syscall_emul.hh revision 14129
1360SN/A/*
210850SGiacomo.Gabrielli@arm.com * Copyright (c) 2012-2013, 2015 ARM Limited
310796Sbrandon.potter@amd.com * Copyright (c) 2015 Advanced Micro Devices, Inc.
410027SChris.Adeniyi-Jones@arm.com * All rights reserved
510027SChris.Adeniyi-Jones@arm.com *
610027SChris.Adeniyi-Jones@arm.com * The license below extends only to copyright in the software and shall
710027SChris.Adeniyi-Jones@arm.com * not be construed as granting a license to any other intellectual
810027SChris.Adeniyi-Jones@arm.com * property including but not limited to intellectual property relating
910027SChris.Adeniyi-Jones@arm.com * to a hardware implementation of the functionality of the software
1010027SChris.Adeniyi-Jones@arm.com * licensed hereunder.  You may use the software subject to the license
1110027SChris.Adeniyi-Jones@arm.com * terms below provided that you ensure that this notice is replicated
1210027SChris.Adeniyi-Jones@arm.com * unmodified and in its entirety in all distributions of the software,
1310027SChris.Adeniyi-Jones@arm.com * modified or unmodified, in source code or in binary form.
1410027SChris.Adeniyi-Jones@arm.com *
151458SN/A * Copyright (c) 2003-2005 The Regents of The University of Michigan
16360SN/A * All rights reserved.
17360SN/A *
18360SN/A * Redistribution and use in source and binary forms, with or without
19360SN/A * modification, are permitted provided that the following conditions are
20360SN/A * met: redistributions of source code must retain the above copyright
21360SN/A * notice, this list of conditions and the following disclaimer;
22360SN/A * redistributions in binary form must reproduce the above copyright
23360SN/A * notice, this list of conditions and the following disclaimer in the
24360SN/A * documentation and/or other materials provided with the distribution;
25360SN/A * neither the name of the copyright holders nor the names of its
26360SN/A * contributors may be used to endorse or promote products derived from
27360SN/A * this software without specific prior written permission.
28360SN/A *
29360SN/A * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
30360SN/A * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
31360SN/A * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
32360SN/A * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
33360SN/A * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
34360SN/A * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
35360SN/A * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
36360SN/A * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
37360SN/A * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
38360SN/A * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
39360SN/A * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
402665Ssaidi@eecs.umich.edu *
412665Ssaidi@eecs.umich.edu * Authors: Steve Reinhardt
422665Ssaidi@eecs.umich.edu *          Kevin Lim
43360SN/A */
44360SN/A
451354SN/A#ifndef __SIM_SYSCALL_EMUL_HH__
461354SN/A#define __SIM_SYSCALL_EMUL_HH__
47360SN/A
4812018Sandreas.sandberg@arm.com#if (defined(__APPLE__) || defined(__OpenBSD__) ||      \
4912018Sandreas.sandberg@arm.com     defined(__FreeBSD__) || defined(__CYGWIN__) ||     \
5012018Sandreas.sandberg@arm.com     defined(__NetBSD__))
5112018Sandreas.sandberg@arm.com#define NO_STAT64 1
5212018Sandreas.sandberg@arm.com#else
5312018Sandreas.sandberg@arm.com#define NO_STAT64 0
5412018Sandreas.sandberg@arm.com#endif
552064SN/A
56360SN/A///
57360SN/A/// @file syscall_emul.hh
58360SN/A///
59360SN/A/// This file defines objects used to emulate syscalls from the target
60360SN/A/// application on the host machine.
61360SN/A
6213936SAndrea.Mondelli@ucf.edu#if defined(__linux__)
6313933Sbrandon.potter@amd.com#include <sys/eventfd.h>
6413933Sbrandon.potter@amd.com#include <sys/statfs.h>
6513933Sbrandon.potter@amd.com
6613936SAndrea.Mondelli@ucf.edu#else
6713936SAndrea.Mondelli@ucf.edu#include <sys/mount.h>
6813936SAndrea.Mondelli@ucf.edu
6913933Sbrandon.potter@amd.com#endif
7013933Sbrandon.potter@amd.com
711809SN/A#ifdef __CYGWIN32__
7211800Sbrandon.potter@amd.com#include <sys/fcntl.h>
7311392Sbrandon.potter@amd.com
741809SN/A#endif
7511392Sbrandon.potter@amd.com#include <fcntl.h>
7613902Sbrandon.potter@amd.com#include <net/if.h>
7713570Sbrandon.potter@amd.com#include <poll.h>
7813902Sbrandon.potter@amd.com#include <sys/ioctl.h>
7911383Sbrandon.potter@amd.com#include <sys/mman.h>
8013568Sbrandon.potter@amd.com#include <sys/socket.h>
813113Sgblack@eecs.umich.edu#include <sys/stat.h>
828229Snate@binkert.org#include <sys/time.h>
8313570Sbrandon.potter@amd.com#include <sys/types.h>
848229Snate@binkert.org#include <sys/uio.h>
8511594Santhony.gutierrez@amd.com#include <unistd.h>
867075Snate@binkert.org
878229Snate@binkert.org#include <cerrno>
8811856Sbrandon.potter@amd.com#include <memory>
897075Snate@binkert.org#include <string>
90360SN/A
9112461Sgabeblack@google.com#include "arch/generic/tlb.hh"
9211886Sbrandon.potter@amd.com#include "arch/utility.hh"
9311800Sbrandon.potter@amd.com#include "base/intmath.hh"
9411392Sbrandon.potter@amd.com#include "base/loader/object_file.hh"
9512334Sgabeblack@google.com#include "base/logging.hh"
961354SN/A#include "base/trace.hh"
976216Snate@binkert.org#include "base/types.hh"
986658Snate@binkert.org#include "config/the_isa.hh"
992474SN/A#include "cpu/base.hh"
1002680Sktlim@umich.edu#include "cpu/thread_context.hh"
1018229Snate@binkert.org#include "mem/page_table.hh"
10211886Sbrandon.potter@amd.com#include "params/Process.hh"
10310496Ssteve.reinhardt@amd.com#include "sim/emul_driver.hh"
10411911SBrandon.Potter@amd.com#include "sim/futex_map.hh"
1058229Snate@binkert.org#include "sim/process.hh"
10611794Sbrandon.potter@amd.com#include "sim/syscall_debug_macros.hh"
10711886Sbrandon.potter@amd.com#include "sim/syscall_desc.hh"
10810497Ssteve.reinhardt@amd.com#include "sim/syscall_emul_buf.hh"
10911794Sbrandon.potter@amd.com#include "sim/syscall_return.hh"
110360SN/A
11113629SAndrea.Mondelli@ucf.edu#if defined(__APPLE__) && defined(__MACH__) && !defined(CMSG_ALIGN)
11213629SAndrea.Mondelli@ucf.edu#define CMSG_ALIGN(len) (((len) + sizeof(size_t) - 1) & ~(sizeof(size_t) - 1))
11313629SAndrea.Mondelli@ucf.edu#endif
11413629SAndrea.Mondelli@ucf.edu
115360SN/A//////////////////////////////////////////////////////////////////////
116360SN/A//
117360SN/A// The following emulation functions are generic enough that they
118360SN/A// don't need to be recompiled for different emulated OS's.  They are
119360SN/A// defined in sim/syscall_emul.cc.
120360SN/A//
121360SN/A//////////////////////////////////////////////////////////////////////
122360SN/A
12313933Sbrandon.potter@amd.comvoid warnUnsupportedOS(std::string syscall_name);
124360SN/A
125378SN/A/// Handler for unimplemented syscalls that we haven't thought about.
12613995Sbrandon.potter@amd.comSyscallReturn unimplementedFunc(SyscallDesc *desc, int num, ThreadContext *tc);
127378SN/A
128378SN/A/// Handler for unimplemented syscalls that we never intend to
129378SN/A/// implement (signal handling, etc.) and should not affect the correct
130378SN/A/// behavior of the program.  Print a warning only if the appropriate
131378SN/A/// trace flag is enabled.  Return success to the target program.
13213995Sbrandon.potter@amd.comSyscallReturn ignoreFunc(SyscallDesc *desc, int num, ThreadContext *tc);
133360SN/A
13411760Sbrandon.potter@amd.com// Target fallocateFunc() handler.
13513995Sbrandon.potter@amd.comSyscallReturn fallocateFunc(SyscallDesc *desc, int num, ThreadContext *tc);
13611760Sbrandon.potter@amd.com
1376109Ssanchezd@stanford.edu/// Target exit() handler: terminate current context.
13813995Sbrandon.potter@amd.comSyscallReturn exitFunc(SyscallDesc *desc, int num, ThreadContext *tc);
139378SN/A
1406109Ssanchezd@stanford.edu/// Target exit_group() handler: terminate simulation. (exit all threads)
14113995Sbrandon.potter@amd.comSyscallReturn exitGroupFunc(SyscallDesc *desc, int num, ThreadContext *tc);
1426109Ssanchezd@stanford.edu
14311886Sbrandon.potter@amd.com/// Target set_tid_address() handler.
14413995Sbrandon.potter@amd.comSyscallReturn setTidAddressFunc(SyscallDesc *desc, int num, ThreadContext *tc);
14511886Sbrandon.potter@amd.com
146378SN/A/// Target getpagesize() handler.
14713995Sbrandon.potter@amd.comSyscallReturn getpagesizeFunc(SyscallDesc *desc, int num, ThreadContext *tc);
148378SN/A
1495748SSteve.Reinhardt@amd.com/// Target brk() handler: set brk address.
15013995Sbrandon.potter@amd.comSyscallReturn brkFunc(SyscallDesc *desc, int num, ThreadContext *tc);
151378SN/A
152378SN/A/// Target close() handler.
15313995Sbrandon.potter@amd.comSyscallReturn closeFunc(SyscallDesc *desc, int num, ThreadContext *tc);
154378SN/A
155378SN/A/// Target lseek() handler.
15613995Sbrandon.potter@amd.comSyscallReturn lseekFunc(SyscallDesc *desc, int num, ThreadContext *tc);
157378SN/A
1584118Sgblack@eecs.umich.edu/// Target _llseek() handler.
15913995Sbrandon.potter@amd.comSyscallReturn _llseekFunc(SyscallDesc *desc, int num, ThreadContext *tc);
1604118Sgblack@eecs.umich.edu
161378SN/A/// Target munmap() handler.
16213995Sbrandon.potter@amd.comSyscallReturn munmapFunc(SyscallDesc *desc, int num, ThreadContext *tc);
163378SN/A
16413568Sbrandon.potter@amd.com/// Target shutdown() handler.
16513995Sbrandon.potter@amd.comSyscallReturn shutdownFunc(SyscallDesc *desc, int num, ThreadContext *tc);
16613568Sbrandon.potter@amd.com
167378SN/A/// Target gethostname() handler.
16813995Sbrandon.potter@amd.comSyscallReturn gethostnameFunc(SyscallDesc *desc, int num, ThreadContext *tc);
169360SN/A
1705513SMichael.Adler@intel.com/// Target getcwd() handler.
17113995Sbrandon.potter@amd.comSyscallReturn getcwdFunc(SyscallDesc *desc, int num, ThreadContext *tc);
1725513SMichael.Adler@intel.com
17310203SAli.Saidi@ARM.com/// Target readlink() handler.
17413995Sbrandon.potter@amd.comSyscallReturn readlinkFunc(SyscallDesc *desc, int num, ThreadContext *tc,
17510203SAli.Saidi@ARM.com                           int index = 0);
17613995Sbrandon.potter@amd.comSyscallReturn readlinkFunc(SyscallDesc *desc, int num, ThreadContext *tc);
1775513SMichael.Adler@intel.com
178511SN/A/// Target unlink() handler.
17913995Sbrandon.potter@amd.comSyscallReturn unlinkHelper(SyscallDesc *desc, int num, ThreadContext *tc,
18010633Smichaelupton@gmail.com                           int index);
18113995Sbrandon.potter@amd.comSyscallReturn unlinkFunc(SyscallDesc *desc, int num, ThreadContext *tc);
182511SN/A
18312795Smattdsinclair@gmail.com/// Target link() handler
18413995Sbrandon.potter@amd.comSyscallReturn linkFunc(SyscallDesc *desc, int num, ThreadContext *tc);
18512795Smattdsinclair@gmail.com
18612796Smattdsinclair@gmail.com/// Target symlink() handler.
18713995Sbrandon.potter@amd.comSyscallReturn symlinkFunc(SyscallDesc *desc, int num, ThreadContext *tc);
18812796Smattdsinclair@gmail.com
1895513SMichael.Adler@intel.com/// Target mkdir() handler.
19013995Sbrandon.potter@amd.comSyscallReturn mkdirFunc(SyscallDesc *desc, int num, ThreadContext *tc);
1915513SMichael.Adler@intel.com
19213031Sbrandon.potter@amd.com/// Target mknod() handler.
19313995Sbrandon.potter@amd.comSyscallReturn mknodFunc(SyscallDesc *desc, int num, ThreadContext *tc);
19413031Sbrandon.potter@amd.com
19513031Sbrandon.potter@amd.com/// Target chdir() handler.
19613995Sbrandon.potter@amd.comSyscallReturn chdirFunc(SyscallDesc *desc, int num, ThreadContext *tc);
19713031Sbrandon.potter@amd.com
19813031Sbrandon.potter@amd.com// Target rmdir() handler.
19913995Sbrandon.potter@amd.comSyscallReturn rmdirFunc(SyscallDesc *desc, int num, ThreadContext *tc);
20013031Sbrandon.potter@amd.com
201511SN/A/// Target rename() handler.
20213995Sbrandon.potter@amd.comSyscallReturn renameFunc(SyscallDesc *desc, int num, ThreadContext *tc);
2031706SN/A
2041706SN/A
2051706SN/A/// Target truncate() handler.
20613995Sbrandon.potter@amd.comSyscallReturn truncateFunc(SyscallDesc *desc, int num, ThreadContext *tc);
2071706SN/A
2081706SN/A
2091706SN/A/// Target ftruncate() handler.
21013995Sbrandon.potter@amd.comSyscallReturn ftruncateFunc(SyscallDesc *desc, int num, ThreadContext *tc);
2111706SN/A
212511SN/A
2136703Svince@csl.cornell.edu/// Target truncate64() handler.
21413995Sbrandon.potter@amd.comSyscallReturn truncate64Func(SyscallDesc *desc, int num, ThreadContext *tc);
2156703Svince@csl.cornell.edu
2166685Stjones1@inf.ed.ac.uk/// Target ftruncate64() handler.
21713995Sbrandon.potter@amd.comSyscallReturn ftruncate64Func(SyscallDesc *desc, int num, ThreadContext *tc);
2186685Stjones1@inf.ed.ac.uk
2196685Stjones1@inf.ed.ac.uk
2205513SMichael.Adler@intel.com/// Target umask() handler.
22113995Sbrandon.potter@amd.comSyscallReturn umaskFunc(SyscallDesc *desc, int num, ThreadContext *tc);
2225513SMichael.Adler@intel.com
22311885Sbrandon.potter@amd.com/// Target gettid() handler.
22413995Sbrandon.potter@amd.comSyscallReturn gettidFunc(SyscallDesc *desc, int num, ThreadContext *tc);
2255513SMichael.Adler@intel.com
2261999SN/A/// Target chown() handler.
22713995Sbrandon.potter@amd.comSyscallReturn chownFunc(SyscallDesc *desc, int num, ThreadContext *tc);
2281999SN/A
22911885Sbrandon.potter@amd.com/// Target setpgid() handler.
23013995Sbrandon.potter@amd.comSyscallReturn setpgidFunc(SyscallDesc *desc, int num, ThreadContext *tc);
2311999SN/A
2321999SN/A/// Target fchown() handler.
23313995Sbrandon.potter@amd.comSyscallReturn fchownFunc(SyscallDesc *desc, int num, ThreadContext *tc);
2341999SN/A
2353079Sstever@eecs.umich.edu/// Target dup() handler.
23613995Sbrandon.potter@amd.comSyscallReturn dupFunc(SyscallDesc *desc, int num, ThreadContext *tc);
2373079Sstever@eecs.umich.edu
23811908SBrandon.Potter@amd.com/// Target dup2() handler.
23913995Sbrandon.potter@amd.comSyscallReturn dup2Func(SyscallDesc *desc, int num, ThreadContext *tc);
24011908SBrandon.Potter@amd.com
24111875Sbrandon.potter@amd.com/// Target fcntl() handler.
24213995Sbrandon.potter@amd.comSyscallReturn fcntlFunc(SyscallDesc *desc, int num, ThreadContext *tc);
2432093SN/A
2442687Sksewell@umich.edu/// Target fcntl64() handler.
24513995Sbrandon.potter@amd.comSyscallReturn fcntl64Func(SyscallDesc *desc, int num, ThreadContext *tc);
2462687Sksewell@umich.edu
2472238SN/A/// Target setuid() handler.
24813995Sbrandon.potter@amd.comSyscallReturn setuidFunc(SyscallDesc *desc, int num, ThreadContext *tc);
2492238SN/A
25011908SBrandon.Potter@amd.com/// Target pipe() handler.
25113995Sbrandon.potter@amd.comSyscallReturn pipeFunc(SyscallDesc *desc, int num, ThreadContext *tc);
25211908SBrandon.Potter@amd.com
25311908SBrandon.Potter@amd.com/// Internal pipe() handler.
25413995Sbrandon.potter@amd.comSyscallReturn pipeImpl(SyscallDesc *desc, int num, ThreadContext *tc,
25514129Smatthew.sinclair@amd.com                       bool pseudo_pipe, bool is_pipe2=false);
25614129Smatthew.sinclair@amd.com
25714129Smatthew.sinclair@amd.com/// Target pipe() handler.
25814129Smatthew.sinclair@amd.comSyscallReturn pipe2Func(SyscallDesc *desc, int num, ThreadContext *tc);
25911908SBrandon.Potter@amd.com
2602238SN/A/// Target getpid() handler.
26113995Sbrandon.potter@amd.comSyscallReturn getpidFunc(SyscallDesc *desc, int num, ThreadContext *tc);
2622238SN/A
26313571Sbrandon.potter@amd.com// Target getpeername() handler.
26413995Sbrandon.potter@amd.comSyscallReturn getpeernameFunc(SyscallDesc *desc, int num, ThreadContext *tc);
26513571Sbrandon.potter@amd.com
26613568Sbrandon.potter@amd.com// Target bind() handler.
26713995Sbrandon.potter@amd.comSyscallReturn bindFunc(SyscallDesc *desc, int num, ThreadContext *tc);
26813568Sbrandon.potter@amd.com
26913568Sbrandon.potter@amd.com// Target listen() handler.
27013995Sbrandon.potter@amd.comSyscallReturn listenFunc(SyscallDesc *desc, int num, ThreadContext *tc);
27113568Sbrandon.potter@amd.com
27213568Sbrandon.potter@amd.com// Target connect() handler.
27313995Sbrandon.potter@amd.comSyscallReturn connectFunc(SyscallDesc *desc, int num, ThreadContext *tc);
27413568Sbrandon.potter@amd.com
27513448Sciro.santilli@arm.com#if defined(SYS_getdents)
27613031Sbrandon.potter@amd.com// Target getdents() handler.
27713995Sbrandon.potter@amd.comSyscallReturn getdentsFunc(SyscallDesc *desc, int num, ThreadContext *tc);
27813448Sciro.santilli@arm.com#endif
27913031Sbrandon.potter@amd.com
28013539Sjavier.setoain@arm.com#if defined(SYS_getdents64)
28113539Sjavier.setoain@arm.com// Target getdents() handler.
28213995Sbrandon.potter@amd.comSyscallReturn getdents64Func(SyscallDesc *desc, int num, ThreadContext *tc);
28313539Sjavier.setoain@arm.com#endif
28413539Sjavier.setoain@arm.com
28513569Sbrandon.potter@amd.com// Target sendto() handler.
28613995Sbrandon.potter@amd.comSyscallReturn sendtoFunc(SyscallDesc *desc, int num, ThreadContext *tc);
28713569Sbrandon.potter@amd.com
28813569Sbrandon.potter@amd.com// Target recvfrom() handler.
28913995Sbrandon.potter@amd.comSyscallReturn recvfromFunc(SyscallDesc *desc, int num, ThreadContext *tc);
29013569Sbrandon.potter@amd.com
29113569Sbrandon.potter@amd.com// Target recvmsg() handler.
29213995Sbrandon.potter@amd.comSyscallReturn recvmsgFunc(SyscallDesc *desc, int num, ThreadContext *tc);
29313569Sbrandon.potter@amd.com
29413569Sbrandon.potter@amd.com// Target sendmsg() handler.
29513995Sbrandon.potter@amd.comSyscallReturn sendmsgFunc(SyscallDesc *desc, int num, ThreadContext *tc);
29613569Sbrandon.potter@amd.com
29713031Sbrandon.potter@amd.com// Target getuid() handler.
29813995Sbrandon.potter@amd.comSyscallReturn getuidFunc(SyscallDesc *desc, int num, ThreadContext *tc);
2992238SN/A
3002238SN/A/// Target getgid() handler.
30113995Sbrandon.potter@amd.comSyscallReturn getgidFunc(SyscallDesc *desc, int num, ThreadContext *tc);
3022238SN/A
3032238SN/A/// Target getppid() handler.
30413995Sbrandon.potter@amd.comSyscallReturn getppidFunc(SyscallDesc *desc, int num, ThreadContext *tc);
3052238SN/A
3062238SN/A/// Target geteuid() handler.
30713995Sbrandon.potter@amd.comSyscallReturn geteuidFunc(SyscallDesc *desc, int num, ThreadContext *tc);
3082238SN/A
3092238SN/A/// Target getegid() handler.
31013995Sbrandon.potter@amd.comSyscallReturn getegidFunc(SyscallDesc *desc, int num, ThreadContext *tc);
3112238SN/A
3129455Smitch.hayenga+gem5@gmail.com/// Target access() handler
31313995Sbrandon.potter@amd.comSyscallReturn accessFunc(SyscallDesc *desc, int num, ThreadContext *tc);
31413995Sbrandon.potter@amd.comSyscallReturn accessFunc(SyscallDesc *desc, int num, ThreadContext *tc,
31511851Sbrandon.potter@amd.com                         int index);
3169455Smitch.hayenga+gem5@gmail.com
31713571Sbrandon.potter@amd.com// Target getsockopt() handler.
31813995Sbrandon.potter@amd.comSyscallReturn getsockoptFunc(SyscallDesc *desc, int num, ThreadContext *tc);
31913571Sbrandon.potter@amd.com
32013571Sbrandon.potter@amd.com// Target setsockopt() handler.
32113995Sbrandon.potter@amd.comSyscallReturn setsockoptFunc(SyscallDesc *desc, int num, ThreadContext *tc);
32213571Sbrandon.potter@amd.com
32313571Sbrandon.potter@amd.com// Target getsockname() handler.
32413995Sbrandon.potter@amd.comSyscallReturn getsocknameFunc(SyscallDesc *desc, int num, ThreadContext *tc);
32513571Sbrandon.potter@amd.com
3269112Smarc.orr@gmail.com/// Futex system call
32711906SBrandon.Potter@amd.com/// Implemented by Daniel Sanchez
32811906SBrandon.Potter@amd.com/// Used by printf's in multi-threaded apps
3299112Smarc.orr@gmail.comtemplate <class OS>
3309112Smarc.orr@gmail.comSyscallReturn
33113995Sbrandon.potter@amd.comfutexFunc(SyscallDesc *desc, int callnum, ThreadContext *tc)
3329112Smarc.orr@gmail.com{
33311911SBrandon.Potter@amd.com    using namespace std;
3349112Smarc.orr@gmail.com
33511911SBrandon.Potter@amd.com    int index = 0;
33613995Sbrandon.potter@amd.com    auto process = tc->getProcessPtr();
33713995Sbrandon.potter@amd.com
33811911SBrandon.Potter@amd.com    Addr uaddr = process->getSyscallArg(tc, index);
33911911SBrandon.Potter@amd.com    int op = process->getSyscallArg(tc, index);
34011911SBrandon.Potter@amd.com    int val = process->getSyscallArg(tc, index);
34113642Sqtt2@cornell.edu    int timeout M5_VAR_USED = process->getSyscallArg(tc, index);
34213642Sqtt2@cornell.edu    Addr uaddr2 M5_VAR_USED = process->getSyscallArg(tc, index);
34313642Sqtt2@cornell.edu    int val3 = process->getSyscallArg(tc, index);
3449112Smarc.orr@gmail.com
34511911SBrandon.Potter@amd.com    /*
34611911SBrandon.Potter@amd.com     * Unsupported option that does not affect the correctness of the
34711911SBrandon.Potter@amd.com     * application. This is a performance optimization utilized by Linux.
34811911SBrandon.Potter@amd.com     */
3499238Slluc.alvarez@bsc.es    op &= ~OS::TGT_FUTEX_PRIVATE_FLAG;
35013642Sqtt2@cornell.edu    op &= ~OS::TGT_FUTEX_CLOCK_REALTIME_FLAG;
3519112Smarc.orr@gmail.com
35211911SBrandon.Potter@amd.com    FutexMap &futex_map = tc->getSystemPtr()->futexMap;
3539112Smarc.orr@gmail.com
35413642Sqtt2@cornell.edu    if (OS::TGT_FUTEX_WAIT == op || OS::TGT_FUTEX_WAIT_BITSET == op) {
35511911SBrandon.Potter@amd.com        // Ensure futex system call accessed atomically.
35611911SBrandon.Potter@amd.com        BufferArg buf(uaddr, sizeof(int));
35714024Sgabeblack@google.com        buf.copyIn(tc->getVirtProxy());
35811911SBrandon.Potter@amd.com        int mem_val = *(int*)buf.bufferPtr();
3599112Smarc.orr@gmail.com
36011911SBrandon.Potter@amd.com        /*
36111911SBrandon.Potter@amd.com         * The value in memory at uaddr is not equal with the expected val
36211911SBrandon.Potter@amd.com         * (a different thread must have changed it before the system call was
36311911SBrandon.Potter@amd.com         * invoked). In this case, we need to throw an error.
36411911SBrandon.Potter@amd.com         */
36511911SBrandon.Potter@amd.com        if (val != mem_val)
3669112Smarc.orr@gmail.com            return -OS::TGT_EWOULDBLOCK;
3679112Smarc.orr@gmail.com
36813642Sqtt2@cornell.edu        if (OS::TGT_FUTEX_WAIT) {
36913642Sqtt2@cornell.edu            futex_map.suspend(uaddr, process->tgid(), tc);
37013642Sqtt2@cornell.edu        } else {
37113642Sqtt2@cornell.edu            futex_map.suspend_bitset(uaddr, process->tgid(), tc, val3);
37213642Sqtt2@cornell.edu        }
37311911SBrandon.Potter@amd.com
3749112Smarc.orr@gmail.com        return 0;
37511911SBrandon.Potter@amd.com    } else if (OS::TGT_FUTEX_WAKE == op) {
37611911SBrandon.Potter@amd.com        return futex_map.wakeup(uaddr, process->tgid(), val);
37713642Sqtt2@cornell.edu    } else if (OS::TGT_FUTEX_WAKE_BITSET == op) {
37813642Sqtt2@cornell.edu        return futex_map.wakeup_bitset(uaddr, process->tgid(), val3);
37913650Smw828@cornell.edu    } else if (OS::TGT_FUTEX_REQUEUE == op ||
38013650Smw828@cornell.edu               OS::TGT_FUTEX_CMP_REQUEUE == op) {
38113650Smw828@cornell.edu
38213650Smw828@cornell.edu        // Ensure futex system call accessed atomically.
38313650Smw828@cornell.edu        BufferArg buf(uaddr, sizeof(int));
38414024Sgabeblack@google.com        buf.copyIn(tc->getVirtProxy());
38513650Smw828@cornell.edu        int mem_val = *(int*)buf.bufferPtr();
38613650Smw828@cornell.edu        /*
38713650Smw828@cornell.edu         * For CMP_REQUEUE, the whole operation is only started only if
38813650Smw828@cornell.edu         * val3 is still the value of the futex pointed to by uaddr.
38913650Smw828@cornell.edu         */
39013650Smw828@cornell.edu        if (OS::TGT_FUTEX_CMP_REQUEUE && val3 != mem_val)
39113650Smw828@cornell.edu            return -OS::TGT_EWOULDBLOCK;
39213650Smw828@cornell.edu        return futex_map.requeue(uaddr, process->tgid(), val, timeout, uaddr2);
39313651Smw828@cornell.edu    } else if (OS::TGT_FUTEX_WAKE_OP == op) {
39413651Smw828@cornell.edu        /*
39513651Smw828@cornell.edu         * The FUTEX_WAKE_OP operation is equivalent to executing the
39613651Smw828@cornell.edu         * following code atomically and totally ordered with respect to
39713651Smw828@cornell.edu         * other futex operations on any of the two supplied futex words:
39813651Smw828@cornell.edu         *
39913651Smw828@cornell.edu         *   int oldval = *(int *) addr2;
40013651Smw828@cornell.edu         *   *(int *) addr2 = oldval op oparg;
40113651Smw828@cornell.edu         *   futex(addr1, FUTEX_WAKE, val, 0, 0, 0);
40213651Smw828@cornell.edu         *   if (oldval cmp cmparg)
40313651Smw828@cornell.edu         *        futex(addr2, FUTEX_WAKE, val2, 0, 0, 0);
40413651Smw828@cornell.edu         *
40513651Smw828@cornell.edu         * (op, oparg, cmp, cmparg are encoded in val3)
40613651Smw828@cornell.edu         *
40713651Smw828@cornell.edu         * +---+---+-----------+-----------+
40813651Smw828@cornell.edu         * |op |cmp|   oparg   |  cmparg   |
40913651Smw828@cornell.edu         * +---+---+-----------+-----------+
41013651Smw828@cornell.edu         *   4   4       12          12    <== # of bits
41113651Smw828@cornell.edu         *
41213651Smw828@cornell.edu         * reference: http://man7.org/linux/man-pages/man2/futex.2.html
41313651Smw828@cornell.edu         *
41413651Smw828@cornell.edu         */
41513651Smw828@cornell.edu        // get value from simulated-space
41613651Smw828@cornell.edu        BufferArg buf(uaddr2, sizeof(int));
41714024Sgabeblack@google.com        buf.copyIn(tc->getVirtProxy());
41813651Smw828@cornell.edu        int oldval = *(int*)buf.bufferPtr();
41913651Smw828@cornell.edu        int newval = oldval;
42013651Smw828@cornell.edu        // extract op, oparg, cmp, cmparg from val3
42113651Smw828@cornell.edu        int wake_cmparg =  val3 & 0xfff;
42213651Smw828@cornell.edu        int wake_oparg  = (val3 & 0xfff000)   >> 12;
42313651Smw828@cornell.edu        int wake_cmp    = (val3 & 0xf000000)  >> 24;
42413651Smw828@cornell.edu        int wake_op     = (val3 & 0xf0000000) >> 28;
42513651Smw828@cornell.edu        if ((wake_op & OS::TGT_FUTEX_OP_ARG_SHIFT) >> 3 == 1)
42613651Smw828@cornell.edu            wake_oparg = (1 << wake_oparg);
42713651Smw828@cornell.edu        wake_op &= ~OS::TGT_FUTEX_OP_ARG_SHIFT;
42813651Smw828@cornell.edu        // perform operation on the value of the second futex
42913651Smw828@cornell.edu        if (wake_op == OS::TGT_FUTEX_OP_SET)
43013651Smw828@cornell.edu            newval = wake_oparg;
43113651Smw828@cornell.edu        else if (wake_op == OS::TGT_FUTEX_OP_ADD)
43213651Smw828@cornell.edu            newval += wake_oparg;
43313651Smw828@cornell.edu        else if (wake_op == OS::TGT_FUTEX_OP_OR)
43413651Smw828@cornell.edu            newval |= wake_oparg;
43513651Smw828@cornell.edu        else if (wake_op == OS::TGT_FUTEX_OP_ANDN)
43613651Smw828@cornell.edu            newval &= ~wake_oparg;
43713651Smw828@cornell.edu        else if (wake_op == OS::TGT_FUTEX_OP_XOR)
43813651Smw828@cornell.edu            newval ^= wake_oparg;
43913651Smw828@cornell.edu        // copy updated value back to simulated-space
44013651Smw828@cornell.edu        *(int*)buf.bufferPtr() = newval;
44114024Sgabeblack@google.com        buf.copyOut(tc->getVirtProxy());
44213651Smw828@cornell.edu        // perform the first wake-up
44313651Smw828@cornell.edu        int woken1 = futex_map.wakeup(uaddr, process->tgid(), val);
44413651Smw828@cornell.edu        int woken2 = 0;
44513651Smw828@cornell.edu        // calculate the condition of the second wake-up
44613651Smw828@cornell.edu        bool is_wake2 = false;
44713651Smw828@cornell.edu        if (wake_cmp == OS::TGT_FUTEX_OP_CMP_EQ)
44813651Smw828@cornell.edu            is_wake2 = oldval == wake_cmparg;
44913651Smw828@cornell.edu        else if (wake_cmp == OS::TGT_FUTEX_OP_CMP_NE)
45013651Smw828@cornell.edu            is_wake2 = oldval != wake_cmparg;
45113651Smw828@cornell.edu        else if (wake_cmp == OS::TGT_FUTEX_OP_CMP_LT)
45213651Smw828@cornell.edu            is_wake2 = oldval < wake_cmparg;
45313651Smw828@cornell.edu        else if (wake_cmp == OS::TGT_FUTEX_OP_CMP_LE)
45413651Smw828@cornell.edu            is_wake2 = oldval <= wake_cmparg;
45513651Smw828@cornell.edu        else if (wake_cmp == OS::TGT_FUTEX_OP_CMP_GT)
45613651Smw828@cornell.edu            is_wake2 = oldval > wake_cmparg;
45713651Smw828@cornell.edu        else if (wake_cmp == OS::TGT_FUTEX_OP_CMP_GE)
45813651Smw828@cornell.edu            is_wake2 = oldval >= wake_cmparg;
45913651Smw828@cornell.edu        // perform the second wake-up
46013651Smw828@cornell.edu        if (is_wake2)
46113651Smw828@cornell.edu            woken2 = futex_map.wakeup(uaddr2, process->tgid(), timeout);
46213651Smw828@cornell.edu
46313651Smw828@cornell.edu        return woken1 + woken2;
4649112Smarc.orr@gmail.com    }
46511911SBrandon.Potter@amd.com    warn("futex: op %d not implemented; ignoring.", op);
46611911SBrandon.Potter@amd.com    return -ENOSYS;
4679112Smarc.orr@gmail.com}
4689112Smarc.orr@gmail.com
4692238SN/A
4702238SN/A/// Pseudo Funcs  - These functions use a different return convension,
4712238SN/A/// returning a second value in a register other than the normal return register
47213995Sbrandon.potter@amd.comSyscallReturn pipePseudoFunc(SyscallDesc *desc, int num, ThreadContext *tc);
4732238SN/A
4742238SN/A/// Target getpidPseudo() handler.
47513995Sbrandon.potter@amd.comSyscallReturn getpidPseudoFunc(SyscallDesc *desc, int num, ThreadContext *tc);
4762238SN/A
4772238SN/A/// Target getuidPseudo() handler.
47813995Sbrandon.potter@amd.comSyscallReturn getuidPseudoFunc(SyscallDesc *desc, int num, ThreadContext *tc);
4792238SN/A
4802238SN/A/// Target getgidPseudo() handler.
48113995Sbrandon.potter@amd.comSyscallReturn getgidPseudoFunc(SyscallDesc *desc, int num, ThreadContext *tc);
4822238SN/A
4832238SN/A
4841354SN/A/// A readable name for 1,000,000, for converting microseconds to seconds.
4851354SN/Aconst int one_million = 1000000;
48610796Sbrandon.potter@amd.com/// A readable name for 1,000,000,000, for converting nanoseconds to seconds.
48710796Sbrandon.potter@amd.comconst int one_billion = 1000000000;
4881354SN/A
4891354SN/A/// Approximate seconds since the epoch (1/1/1970).  About a billion,
4901354SN/A/// by my reckoning.  We want to keep this a constant (not use the
4911354SN/A/// real-world time) to keep simulations repeatable.
4921354SN/Aconst unsigned seconds_since_epoch = 1000000000;
4931354SN/A
4941354SN/A/// Helper function to convert current elapsed time to seconds and
4951354SN/A/// microseconds.
4961354SN/Atemplate <class T1, class T2>
4971354SN/Avoid
49810796Sbrandon.potter@amd.comgetElapsedTimeMicro(T1 &sec, T2 &usec)
4991354SN/A{
50010796Sbrandon.potter@amd.com    uint64_t elapsed_usecs = curTick() / SimClock::Int::us;
5011354SN/A    sec = elapsed_usecs / one_million;
5021354SN/A    usec = elapsed_usecs % one_million;
5031354SN/A}
5041354SN/A
50510796Sbrandon.potter@amd.com/// Helper function to convert current elapsed time to seconds and
50610796Sbrandon.potter@amd.com/// nanoseconds.
50710796Sbrandon.potter@amd.comtemplate <class T1, class T2>
50810796Sbrandon.potter@amd.comvoid
50910796Sbrandon.potter@amd.comgetElapsedTimeNano(T1 &sec, T2 &nsec)
51010796Sbrandon.potter@amd.com{
51110796Sbrandon.potter@amd.com    uint64_t elapsed_nsecs = curTick() / SimClock::Int::ns;
51210796Sbrandon.potter@amd.com    sec = elapsed_nsecs / one_billion;
51310796Sbrandon.potter@amd.com    nsec = elapsed_nsecs % one_billion;
51410796Sbrandon.potter@amd.com}
51510796Sbrandon.potter@amd.com
516360SN/A//////////////////////////////////////////////////////////////////////
517360SN/A//
518360SN/A// The following emulation functions are generic, but need to be
519360SN/A// templated to account for differences in types, constants, etc.
520360SN/A//
521360SN/A//////////////////////////////////////////////////////////////////////
522360SN/A
52311759Sbrandon.potter@amd.com    typedef struct statfs hst_statfs;
5243113Sgblack@eecs.umich.edu#if NO_STAT64
5253113Sgblack@eecs.umich.edu    typedef struct stat hst_stat;
5263113Sgblack@eecs.umich.edu    typedef struct stat hst_stat64;
5273113Sgblack@eecs.umich.edu#else
5283113Sgblack@eecs.umich.edu    typedef struct stat hst_stat;
5293113Sgblack@eecs.umich.edu    typedef struct stat64 hst_stat64;
5303113Sgblack@eecs.umich.edu#endif
5313113Sgblack@eecs.umich.edu
5323113Sgblack@eecs.umich.edu//// Helper function to convert a host stat buffer to a target stat
5333113Sgblack@eecs.umich.edu//// buffer.  Also copies the target buffer out to the simulated
5343113Sgblack@eecs.umich.edu//// memory space.  Used by stat(), fstat(), and lstat().
5353113Sgblack@eecs.umich.edu
5363113Sgblack@eecs.umich.edutemplate <typename target_stat, typename host_stat>
53712032Sandreas.sandberg@arm.comvoid
5383113Sgblack@eecs.umich.educonvertStatBuf(target_stat &tgt, host_stat *host, bool fakeTTY = false)
5393113Sgblack@eecs.umich.edu{
5404189Sgblack@eecs.umich.edu    using namespace TheISA;
5414189Sgblack@eecs.umich.edu
5423113Sgblack@eecs.umich.edu    if (fakeTTY)
5433113Sgblack@eecs.umich.edu        tgt->st_dev = 0xA;
5443113Sgblack@eecs.umich.edu    else
5453113Sgblack@eecs.umich.edu        tgt->st_dev = host->st_dev;
5468737Skoansin.tan@gmail.com    tgt->st_dev = TheISA::htog(tgt->st_dev);
5473113Sgblack@eecs.umich.edu    tgt->st_ino = host->st_ino;
5488737Skoansin.tan@gmail.com    tgt->st_ino = TheISA::htog(tgt->st_ino);
5493277Sgblack@eecs.umich.edu    tgt->st_mode = host->st_mode;
5505515SMichael.Adler@intel.com    if (fakeTTY) {
5515515SMichael.Adler@intel.com        // Claim to be a character device
5525515SMichael.Adler@intel.com        tgt->st_mode &= ~S_IFMT;    // Clear S_IFMT
5535515SMichael.Adler@intel.com        tgt->st_mode |= S_IFCHR;    // Set S_IFCHR
5545515SMichael.Adler@intel.com    }
5558737Skoansin.tan@gmail.com    tgt->st_mode = TheISA::htog(tgt->st_mode);
5563277Sgblack@eecs.umich.edu    tgt->st_nlink = host->st_nlink;
5578737Skoansin.tan@gmail.com    tgt->st_nlink = TheISA::htog(tgt->st_nlink);
5583277Sgblack@eecs.umich.edu    tgt->st_uid = host->st_uid;
5598737Skoansin.tan@gmail.com    tgt->st_uid = TheISA::htog(tgt->st_uid);
5603277Sgblack@eecs.umich.edu    tgt->st_gid = host->st_gid;
5618737Skoansin.tan@gmail.com    tgt->st_gid = TheISA::htog(tgt->st_gid);
5623113Sgblack@eecs.umich.edu    if (fakeTTY)
5633113Sgblack@eecs.umich.edu        tgt->st_rdev = 0x880d;
5643113Sgblack@eecs.umich.edu    else
5653113Sgblack@eecs.umich.edu        tgt->st_rdev = host->st_rdev;
5668737Skoansin.tan@gmail.com    tgt->st_rdev = TheISA::htog(tgt->st_rdev);
5673113Sgblack@eecs.umich.edu    tgt->st_size = host->st_size;
5688737Skoansin.tan@gmail.com    tgt->st_size = TheISA::htog(tgt->st_size);
5693114Sgblack@eecs.umich.edu    tgt->st_atimeX = host->st_atime;
5708737Skoansin.tan@gmail.com    tgt->st_atimeX = TheISA::htog(tgt->st_atimeX);
5713114Sgblack@eecs.umich.edu    tgt->st_mtimeX = host->st_mtime;
5728737Skoansin.tan@gmail.com    tgt->st_mtimeX = TheISA::htog(tgt->st_mtimeX);
5733114Sgblack@eecs.umich.edu    tgt->st_ctimeX = host->st_ctime;
5748737Skoansin.tan@gmail.com    tgt->st_ctimeX = TheISA::htog(tgt->st_ctimeX);
57511906SBrandon.Potter@amd.com    // Force the block size to be 8KB. This helps to ensure buffered io works
5764061Sgblack@eecs.umich.edu    // consistently across different hosts.
5774061Sgblack@eecs.umich.edu    tgt->st_blksize = 0x2000;
5788737Skoansin.tan@gmail.com    tgt->st_blksize = TheISA::htog(tgt->st_blksize);
5793113Sgblack@eecs.umich.edu    tgt->st_blocks = host->st_blocks;
5808737Skoansin.tan@gmail.com    tgt->st_blocks = TheISA::htog(tgt->st_blocks);
5813113Sgblack@eecs.umich.edu}
5823113Sgblack@eecs.umich.edu
5833113Sgblack@eecs.umich.edu// Same for stat64
5843113Sgblack@eecs.umich.edu
5853113Sgblack@eecs.umich.edutemplate <typename target_stat, typename host_stat64>
58612032Sandreas.sandberg@arm.comvoid
5873113Sgblack@eecs.umich.educonvertStat64Buf(target_stat &tgt, host_stat64 *host, bool fakeTTY = false)
5883113Sgblack@eecs.umich.edu{
5894189Sgblack@eecs.umich.edu    using namespace TheISA;
5904189Sgblack@eecs.umich.edu
5913113Sgblack@eecs.umich.edu    convertStatBuf<target_stat, host_stat64>(tgt, host, fakeTTY);
5923113Sgblack@eecs.umich.edu#if defined(STAT_HAVE_NSEC)
5933113Sgblack@eecs.umich.edu    tgt->st_atime_nsec = host->st_atime_nsec;
5948737Skoansin.tan@gmail.com    tgt->st_atime_nsec = TheISA::htog(tgt->st_atime_nsec);
5953113Sgblack@eecs.umich.edu    tgt->st_mtime_nsec = host->st_mtime_nsec;
5968737Skoansin.tan@gmail.com    tgt->st_mtime_nsec = TheISA::htog(tgt->st_mtime_nsec);
5973113Sgblack@eecs.umich.edu    tgt->st_ctime_nsec = host->st_ctime_nsec;
5988737Skoansin.tan@gmail.com    tgt->st_ctime_nsec = TheISA::htog(tgt->st_ctime_nsec);
5993113Sgblack@eecs.umich.edu#else
6003113Sgblack@eecs.umich.edu    tgt->st_atime_nsec = 0;
6013113Sgblack@eecs.umich.edu    tgt->st_mtime_nsec = 0;
6023113Sgblack@eecs.umich.edu    tgt->st_ctime_nsec = 0;
6033113Sgblack@eecs.umich.edu#endif
6043113Sgblack@eecs.umich.edu}
6053113Sgblack@eecs.umich.edu
60611906SBrandon.Potter@amd.com// Here are a couple of convenience functions
6073113Sgblack@eecs.umich.edutemplate<class OS>
60812032Sandreas.sandberg@arm.comvoid
60914020Sgabeblack@google.comcopyOutStatBuf(PortProxy &mem, Addr addr,
61011906SBrandon.Potter@amd.com               hst_stat *host, bool fakeTTY = false)
6113113Sgblack@eecs.umich.edu{
6123113Sgblack@eecs.umich.edu    typedef TypedBufferArg<typename OS::tgt_stat> tgt_stat_buf;
6133113Sgblack@eecs.umich.edu    tgt_stat_buf tgt(addr);
6143113Sgblack@eecs.umich.edu    convertStatBuf<tgt_stat_buf, hst_stat>(tgt, host, fakeTTY);
6153113Sgblack@eecs.umich.edu    tgt.copyOut(mem);
6163113Sgblack@eecs.umich.edu}
6173113Sgblack@eecs.umich.edu
6183113Sgblack@eecs.umich.edutemplate<class OS>
61912032Sandreas.sandberg@arm.comvoid
62014020Sgabeblack@google.comcopyOutStat64Buf(PortProxy &mem, Addr addr,
62111906SBrandon.Potter@amd.com                 hst_stat64 *host, bool fakeTTY = false)
6223113Sgblack@eecs.umich.edu{
6233113Sgblack@eecs.umich.edu    typedef TypedBufferArg<typename OS::tgt_stat64> tgt_stat_buf;
6243113Sgblack@eecs.umich.edu    tgt_stat_buf tgt(addr);
6256686Stjones1@inf.ed.ac.uk    convertStat64Buf<tgt_stat_buf, hst_stat64>(tgt, host, fakeTTY);
6263113Sgblack@eecs.umich.edu    tgt.copyOut(mem);
6273113Sgblack@eecs.umich.edu}
6283113Sgblack@eecs.umich.edu
62911759Sbrandon.potter@amd.comtemplate <class OS>
63012032Sandreas.sandberg@arm.comvoid
63114020Sgabeblack@google.comcopyOutStatfsBuf(PortProxy &mem, Addr addr,
63211759Sbrandon.potter@amd.com                 hst_statfs *host)
63311759Sbrandon.potter@amd.com{
63411759Sbrandon.potter@amd.com    TypedBufferArg<typename OS::tgt_statfs> tgt(addr);
63511759Sbrandon.potter@amd.com
63611812Sbaz21@cam.ac.uk    tgt->f_type = TheISA::htog(host->f_type);
63711812Sbaz21@cam.ac.uk#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)
63811812Sbaz21@cam.ac.uk    tgt->f_bsize = TheISA::htog(host->f_iosize);
63911759Sbrandon.potter@amd.com#else
64011812Sbaz21@cam.ac.uk    tgt->f_bsize = TheISA::htog(host->f_bsize);
64111759Sbrandon.potter@amd.com#endif
64211759Sbrandon.potter@amd.com    tgt->f_blocks = TheISA::htog(host->f_blocks);
64311759Sbrandon.potter@amd.com    tgt->f_bfree = TheISA::htog(host->f_bfree);
64411759Sbrandon.potter@amd.com    tgt->f_bavail = TheISA::htog(host->f_bavail);
64511759Sbrandon.potter@amd.com    tgt->f_files = TheISA::htog(host->f_files);
64611759Sbrandon.potter@amd.com    tgt->f_ffree = TheISA::htog(host->f_ffree);
64711759Sbrandon.potter@amd.com    memcpy(&tgt->f_fsid, &host->f_fsid, sizeof(host->f_fsid));
64811812Sbaz21@cam.ac.uk#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)
64911812Sbaz21@cam.ac.uk    tgt->f_namelen = TheISA::htog(host->f_namemax);
65011812Sbaz21@cam.ac.uk    tgt->f_frsize = TheISA::htog(host->f_bsize);
65111812Sbaz21@cam.ac.uk#elif defined(__APPLE__)
65211812Sbaz21@cam.ac.uk    tgt->f_namelen = 0;
65311812Sbaz21@cam.ac.uk    tgt->f_frsize = 0;
65411812Sbaz21@cam.ac.uk#else
65511759Sbrandon.potter@amd.com    tgt->f_namelen = TheISA::htog(host->f_namelen);
65611759Sbrandon.potter@amd.com    tgt->f_frsize = TheISA::htog(host->f_frsize);
65711812Sbaz21@cam.ac.uk#endif
65811812Sbaz21@cam.ac.uk#if defined(__linux__)
65911759Sbrandon.potter@amd.com    memcpy(&tgt->f_spare, &host->f_spare, sizeof(host->f_spare));
66011812Sbaz21@cam.ac.uk#else
66111812Sbaz21@cam.ac.uk    /*
66211812Sbaz21@cam.ac.uk     * The fields are different sizes per OS. Don't bother with
66311812Sbaz21@cam.ac.uk     * f_spare or f_reserved on non-Linux for now.
66411812Sbaz21@cam.ac.uk     */
66511812Sbaz21@cam.ac.uk    memset(&tgt->f_spare, 0, sizeof(tgt->f_spare));
66611812Sbaz21@cam.ac.uk#endif
66711759Sbrandon.potter@amd.com
66811759Sbrandon.potter@amd.com    tgt.copyOut(mem);
66911759Sbrandon.potter@amd.com}
67011759Sbrandon.potter@amd.com
671378SN/A/// Target ioctl() handler.  For the most part, programs call ioctl()
672378SN/A/// only to find out if their stdout is a tty, to determine whether to
6739141Smarc.orr@gmail.com/// do line or block buffering.  We always claim that output fds are
6749141Smarc.orr@gmail.com/// not TTYs to provide repeatable results.
675360SN/Atemplate <class OS>
6761450SN/ASyscallReturn
67713995Sbrandon.potter@amd.comioctlFunc(SyscallDesc *desc, int callnum, ThreadContext *tc)
678360SN/A{
6796701Sgblack@eecs.umich.edu    int index = 0;
68013995Sbrandon.potter@amd.com    auto p = tc->getProcessPtr();
68113995Sbrandon.potter@amd.com
68211856Sbrandon.potter@amd.com    int tgt_fd = p->getSyscallArg(tc, index);
68311856Sbrandon.potter@amd.com    unsigned req = p->getSyscallArg(tc, index);
684360SN/A
68513907Salexandru.dutu@amd.com    DPRINTF_SYSCALL(Verbose, "ioctl(%d, 0x%x, ...)\n", tgt_fd, req);
686360SN/A
68711856Sbrandon.potter@amd.com    if (OS::isTtyReq(req))
68811856Sbrandon.potter@amd.com        return -ENOTTY;
68910496Ssteve.reinhardt@amd.com
69011856Sbrandon.potter@amd.com    auto dfdp = std::dynamic_pointer_cast<DeviceFDEntry>((*p->fds)[tgt_fd]);
69113902Sbrandon.potter@amd.com    if (dfdp) {
69213902Sbrandon.potter@amd.com        EmulatedDriver *emul_driver = dfdp->getDriver();
69313902Sbrandon.potter@amd.com        if (emul_driver)
69413995Sbrandon.potter@amd.com            return emul_driver->ioctl(tc, req);
69513902Sbrandon.potter@amd.com    }
69613902Sbrandon.potter@amd.com
69713902Sbrandon.potter@amd.com    auto sfdp = std::dynamic_pointer_cast<SocketFDEntry>((*p->fds)[tgt_fd]);
69813902Sbrandon.potter@amd.com    if (sfdp) {
69913902Sbrandon.potter@amd.com        int status;
70013902Sbrandon.potter@amd.com
70113902Sbrandon.potter@amd.com        switch (req) {
70213902Sbrandon.potter@amd.com          case SIOCGIFCONF: {
70313902Sbrandon.potter@amd.com            Addr conf_addr = p->getSyscallArg(tc, index);
70413902Sbrandon.potter@amd.com            BufferArg conf_arg(conf_addr, sizeof(ifconf));
70514024Sgabeblack@google.com            conf_arg.copyIn(tc->getVirtProxy());
70613902Sbrandon.potter@amd.com
70713902Sbrandon.potter@amd.com            ifconf *conf = (ifconf*)conf_arg.bufferPtr();
70813902Sbrandon.potter@amd.com            Addr ifc_buf_addr = (Addr)conf->ifc_buf;
70913902Sbrandon.potter@amd.com            BufferArg ifc_buf_arg(ifc_buf_addr, conf->ifc_len);
71014024Sgabeblack@google.com            ifc_buf_arg.copyIn(tc->getVirtProxy());
71113902Sbrandon.potter@amd.com
71213902Sbrandon.potter@amd.com            conf->ifc_buf = (char*)ifc_buf_arg.bufferPtr();
71313902Sbrandon.potter@amd.com
71413902Sbrandon.potter@amd.com            status = ioctl(sfdp->getSimFD(), req, conf_arg.bufferPtr());
71513902Sbrandon.potter@amd.com            if (status != -1) {
71613902Sbrandon.potter@amd.com                conf->ifc_buf = (char*)ifc_buf_addr;
71714024Sgabeblack@google.com                ifc_buf_arg.copyOut(tc->getVirtProxy());
71814024Sgabeblack@google.com                conf_arg.copyOut(tc->getVirtProxy());
71913902Sbrandon.potter@amd.com            }
72013902Sbrandon.potter@amd.com
72113902Sbrandon.potter@amd.com            return status;
72213902Sbrandon.potter@amd.com          }
72313902Sbrandon.potter@amd.com          case SIOCGIFFLAGS:
72413936SAndrea.Mondelli@ucf.edu#if defined(__linux__)
72513902Sbrandon.potter@amd.com          case SIOCGIFINDEX:
72613902Sbrandon.potter@amd.com#endif
72713902Sbrandon.potter@amd.com          case SIOCGIFNETMASK:
72813902Sbrandon.potter@amd.com          case SIOCGIFADDR:
72913936SAndrea.Mondelli@ucf.edu#if defined(__linux__)
73013902Sbrandon.potter@amd.com          case SIOCGIFHWADDR:
73113902Sbrandon.potter@amd.com#endif
73213902Sbrandon.potter@amd.com          case SIOCGIFMTU: {
73313902Sbrandon.potter@amd.com            Addr req_addr = p->getSyscallArg(tc, index);
73413902Sbrandon.potter@amd.com            BufferArg req_arg(req_addr, sizeof(ifreq));
73514024Sgabeblack@google.com            req_arg.copyIn(tc->getVirtProxy());
73613902Sbrandon.potter@amd.com
73713902Sbrandon.potter@amd.com            status = ioctl(sfdp->getSimFD(), req, req_arg.bufferPtr());
73813902Sbrandon.potter@amd.com            if (status != -1)
73914024Sgabeblack@google.com                req_arg.copyOut(tc->getVirtProxy());
74013902Sbrandon.potter@amd.com            return status;
74113902Sbrandon.potter@amd.com          }
74213902Sbrandon.potter@amd.com        }
74313902Sbrandon.potter@amd.com    }
74410496Ssteve.reinhardt@amd.com
74511856Sbrandon.potter@amd.com    /**
74611856Sbrandon.potter@amd.com     * For lack of a better return code, return ENOTTY. Ideally, we should
74711856Sbrandon.potter@amd.com     * return something better here, but at least we issue the warning.
74811856Sbrandon.potter@amd.com     */
74911856Sbrandon.potter@amd.com    warn("Unsupported ioctl call (return ENOTTY): ioctl(%d, 0x%x, ...) @ \n",
75010930Sbrandon.potter@amd.com         tgt_fd, req, tc->pcState());
7519141Smarc.orr@gmail.com    return -ENOTTY;
752360SN/A}
753360SN/A
754360SN/Atemplate <class OS>
75511907SBrandon.Potter@amd.comSyscallReturn
75613995Sbrandon.potter@amd.comopenImpl(SyscallDesc *desc, int callnum, ThreadContext *tc, bool isopenat)
757360SN/A{
75811907SBrandon.Potter@amd.com    int index = 0;
75913995Sbrandon.potter@amd.com    auto p = tc->getProcessPtr();
76011907SBrandon.Potter@amd.com    int tgt_dirfd = -1;
76111907SBrandon.Potter@amd.com
76211907SBrandon.Potter@amd.com    /**
76311907SBrandon.Potter@amd.com     * If using the openat variant, read in the target directory file
76411907SBrandon.Potter@amd.com     * descriptor from the simulated process.
76511907SBrandon.Potter@amd.com     */
76611907SBrandon.Potter@amd.com    if (isopenat)
76711907SBrandon.Potter@amd.com        tgt_dirfd = p->getSyscallArg(tc, index);
76811907SBrandon.Potter@amd.com
76911907SBrandon.Potter@amd.com    /**
77011907SBrandon.Potter@amd.com     * Retrieve the simulated process' memory proxy and then read in the path
77111907SBrandon.Potter@amd.com     * string from that memory space into the host's working memory space.
77211907SBrandon.Potter@amd.com     */
773360SN/A    std::string path;
77414024Sgabeblack@google.com    if (!tc->getVirtProxy().tryReadString(path, p->getSyscallArg(tc, index)))
7751458SN/A        return -EFAULT;
776360SN/A
77711907SBrandon.Potter@amd.com#ifdef __CYGWIN32__
77811907SBrandon.Potter@amd.com    int host_flags = O_BINARY;
77911907SBrandon.Potter@amd.com#else
78011907SBrandon.Potter@amd.com    int host_flags = 0;
78111907SBrandon.Potter@amd.com#endif
78211907SBrandon.Potter@amd.com    /**
78311907SBrandon.Potter@amd.com     * Translate target flags into host flags. Flags exist which are not
78411907SBrandon.Potter@amd.com     * ported between architectures which can cause check failures.
78511907SBrandon.Potter@amd.com     */
78611907SBrandon.Potter@amd.com    int tgt_flags = p->getSyscallArg(tc, index);
787360SN/A    for (int i = 0; i < OS::NUM_OPEN_FLAGS; i++) {
78811907SBrandon.Potter@amd.com        if (tgt_flags & OS::openFlagTable[i].tgtFlag) {
78911907SBrandon.Potter@amd.com            tgt_flags &= ~OS::openFlagTable[i].tgtFlag;
79011907SBrandon.Potter@amd.com            host_flags |= OS::openFlagTable[i].hostFlag;
791360SN/A        }
792360SN/A    }
79311907SBrandon.Potter@amd.com    if (tgt_flags) {
79411907SBrandon.Potter@amd.com        warn("open%s: cannot decode flags 0x%x",
79511907SBrandon.Potter@amd.com             isopenat ? "at" : "", tgt_flags);
79611907SBrandon.Potter@amd.com    }
797360SN/A#ifdef __CYGWIN32__
79811907SBrandon.Potter@amd.com    host_flags |= O_BINARY;
799360SN/A#endif
800360SN/A
80111907SBrandon.Potter@amd.com    int mode = p->getSyscallArg(tc, index);
8023669Sbinkertn@umich.edu
80311907SBrandon.Potter@amd.com    /**
80411907SBrandon.Potter@amd.com     * If the simulated process called open or openat with AT_FDCWD specified,
80511907SBrandon.Potter@amd.com     * take the current working directory value which was passed into the
80611907SBrandon.Potter@amd.com     * process class as a Python parameter and append the current path to
80711907SBrandon.Potter@amd.com     * create a full path.
80811907SBrandon.Potter@amd.com     * Otherwise, openat with a valid target directory file descriptor has
80911907SBrandon.Potter@amd.com     * been called. If the path option, which was passed in as a parameter,
81011907SBrandon.Potter@amd.com     * is not absolute, retrieve the directory file descriptor's path and
81111907SBrandon.Potter@amd.com     * prepend it to the path passed in as a parameter.
81211907SBrandon.Potter@amd.com     * In every case, we should have a full path (which is relevant to the
81311907SBrandon.Potter@amd.com     * host) to work with after this block has been passed.
81411907SBrandon.Potter@amd.com     */
81513883Sdavid.hashe@amd.com    std::string redir_path = path;
81613883Sdavid.hashe@amd.com    std::string abs_path = path;
81713883Sdavid.hashe@amd.com    if (!isopenat || tgt_dirfd == OS::TGT_AT_FDCWD) {
81813883Sdavid.hashe@amd.com        abs_path = p->absolutePath(path, true);
81913883Sdavid.hashe@amd.com        redir_path = p->checkPathRedirect(path);
82011907SBrandon.Potter@amd.com    } else if (!startswith(path, "/")) {
82111907SBrandon.Potter@amd.com        std::shared_ptr<FDEntry> fdep = ((*p->fds)[tgt_dirfd]);
82211907SBrandon.Potter@amd.com        auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(fdep);
82311907SBrandon.Potter@amd.com        if (!ffdp)
82411907SBrandon.Potter@amd.com            return -EBADF;
82513883Sdavid.hashe@amd.com        abs_path = ffdp->getFileName() + path;
82613883Sdavid.hashe@amd.com        redir_path = p->checkPathRedirect(abs_path);
82711907SBrandon.Potter@amd.com    }
8281706SN/A
82911907SBrandon.Potter@amd.com    /**
83011907SBrandon.Potter@amd.com     * Since this is an emulated environment, we create pseudo file
83111907SBrandon.Potter@amd.com     * descriptors for device requests that have been registered with
83211907SBrandon.Potter@amd.com     * the process class through Python; this allows us to create a file
83311907SBrandon.Potter@amd.com     * descriptor for subsequent ioctl or mmap calls.
83411907SBrandon.Potter@amd.com     */
83513883Sdavid.hashe@amd.com    if (startswith(abs_path, "/dev/")) {
83613883Sdavid.hashe@amd.com        std::string filename = abs_path.substr(strlen("/dev/"));
83711907SBrandon.Potter@amd.com        EmulatedDriver *drv = p->findDriver(filename);
83811907SBrandon.Potter@amd.com        if (drv) {
83911907SBrandon.Potter@amd.com            DPRINTF_SYSCALL(Verbose, "open%s: passing call to "
84011907SBrandon.Potter@amd.com                            "driver open with path[%s]\n",
84113883Sdavid.hashe@amd.com                            isopenat ? "at" : "", abs_path.c_str());
84213995Sbrandon.potter@amd.com            return drv->open(tc, mode, host_flags);
84310496Ssteve.reinhardt@amd.com        }
84411907SBrandon.Potter@amd.com        /**
84511907SBrandon.Potter@amd.com         * Fall through here for pass through to host devices, such
84611907SBrandon.Potter@amd.com         * as /dev/zero
84711907SBrandon.Potter@amd.com         */
84810496Ssteve.reinhardt@amd.com    }
84910496Ssteve.reinhardt@amd.com
85011907SBrandon.Potter@amd.com    /**
85113883Sdavid.hashe@amd.com     * We make several attempts resolve a call to open.
85213883Sdavid.hashe@amd.com     *
85313883Sdavid.hashe@amd.com     * 1) Resolve any path redirection before hand. This will set the path
85413883Sdavid.hashe@amd.com     * up with variable 'redir_path' which may contain a modified path or
85513883Sdavid.hashe@amd.com     * the original path value. This should already be done in prior code.
85613883Sdavid.hashe@amd.com     * 2) Try to handle the access using 'special_paths'. Some special_paths
85713883Sdavid.hashe@amd.com     * and files cannot be called on the host and need to be handled as
85813883Sdavid.hashe@amd.com     * special cases inside the simulator. These special_paths are handled by
85913883Sdavid.hashe@amd.com     * C++ routines to provide output back to userspace.
86013883Sdavid.hashe@amd.com     * 3) If the full path that was created above does not match any of the
86113883Sdavid.hashe@amd.com     * special cases, pass it through to the open call on the __HOST__ to let
86213883Sdavid.hashe@amd.com     * the host open the file on our behalf. Again, the openImpl tries to
86313883Sdavid.hashe@amd.com     * USE_THE_HOST_FILESYSTEM_OPEN (with a possible redirection to the
86413883Sdavid.hashe@amd.com     * faux-filesystem files). The faux-filesystem is dynamically created
86513883Sdavid.hashe@amd.com     * during simulator configuration using Python functions.
86613883Sdavid.hashe@amd.com     * 4) If the host cannot open the file, the open attempt failed in "3)".
86713883Sdavid.hashe@amd.com     * Return the host's error code back through the system call to the
86813883Sdavid.hashe@amd.com     * simulated process. If running a debug trace, also notify the user that
86913883Sdavid.hashe@amd.com     * the open call failed.
87013883Sdavid.hashe@amd.com     *
87113883Sdavid.hashe@amd.com     * Any success will set sim_fd to something other than -1 and skip the
87213883Sdavid.hashe@amd.com     * next conditions effectively bypassing them.
87311907SBrandon.Potter@amd.com     */
87411907SBrandon.Potter@amd.com    int sim_fd = -1;
87513883Sdavid.hashe@amd.com    std::string used_path;
87611907SBrandon.Potter@amd.com    std::vector<std::string> special_paths =
87713994Santhony.gutierrez@amd.com            { "/proc/meminfo/", "/system/", "/platform/", "/etc/passwd" };
87811907SBrandon.Potter@amd.com    for (auto entry : special_paths) {
87913883Sdavid.hashe@amd.com        if (startswith(path, entry)) {
88013883Sdavid.hashe@amd.com            sim_fd = OS::openSpecialFile(abs_path, p, tc);
88113883Sdavid.hashe@amd.com            used_path = abs_path;
88213883Sdavid.hashe@amd.com        }
88311907SBrandon.Potter@amd.com    }
88411907SBrandon.Potter@amd.com    if (sim_fd == -1) {
88513883Sdavid.hashe@amd.com        sim_fd = open(redir_path.c_str(), host_flags, mode);
88613883Sdavid.hashe@amd.com        used_path = redir_path;
88711907SBrandon.Potter@amd.com    }
88811907SBrandon.Potter@amd.com    if (sim_fd == -1) {
88911907SBrandon.Potter@amd.com        int local = -errno;
89013883Sdavid.hashe@amd.com        DPRINTF_SYSCALL(Verbose, "open%s: failed -> path:%s "
89113883Sdavid.hashe@amd.com                        "(inferred from:%s)\n", isopenat ? "at" : "",
89213883Sdavid.hashe@amd.com                        used_path.c_str(), path.c_str());
89311907SBrandon.Potter@amd.com        return local;
89411907SBrandon.Potter@amd.com    }
895360SN/A
89611907SBrandon.Potter@amd.com    /**
89711907SBrandon.Potter@amd.com     * The file was opened successfully and needs to be recorded in the
89811907SBrandon.Potter@amd.com     * process' file descriptor array so that it can be retrieved later.
89911907SBrandon.Potter@amd.com     * The target file descriptor that is chosen will be the lowest unused
90011907SBrandon.Potter@amd.com     * file descriptor.
90111907SBrandon.Potter@amd.com     * Return the indirect target file descriptor back to the simulated
90211907SBrandon.Potter@amd.com     * process to act as a handle for the opened file.
90311907SBrandon.Potter@amd.com     */
90411907SBrandon.Potter@amd.com    auto ffdp = std::make_shared<FileFDEntry>(sim_fd, host_flags, path, 0);
90511907SBrandon.Potter@amd.com    int tgt_fd = p->fds->allocFD(ffdp);
90613883Sdavid.hashe@amd.com    DPRINTF_SYSCALL(Verbose, "open%s: sim_fd[%d], target_fd[%d] -> path:%s\n"
90713883Sdavid.hashe@amd.com                    "(inferred from:%s)\n", isopenat ? "at" : "",
90813883Sdavid.hashe@amd.com                    sim_fd, tgt_fd, used_path.c_str(), path.c_str());
90911907SBrandon.Potter@amd.com    return tgt_fd;
910360SN/A}
911360SN/A
91210027SChris.Adeniyi-Jones@arm.com/// Target open() handler.
91310027SChris.Adeniyi-Jones@arm.comtemplate <class OS>
91410027SChris.Adeniyi-Jones@arm.comSyscallReturn
91513995Sbrandon.potter@amd.comopenFunc(SyscallDesc *desc, int callnum, ThreadContext *tc)
91610027SChris.Adeniyi-Jones@arm.com{
91713995Sbrandon.potter@amd.com    return openImpl<OS>(desc, callnum, tc, false);
91810027SChris.Adeniyi-Jones@arm.com}
91910027SChris.Adeniyi-Jones@arm.com
92010027SChris.Adeniyi-Jones@arm.com/// Target openat() handler.
92110027SChris.Adeniyi-Jones@arm.comtemplate <class OS>
92210027SChris.Adeniyi-Jones@arm.comSyscallReturn
92313995Sbrandon.potter@amd.comopenatFunc(SyscallDesc *desc, int callnum, ThreadContext *tc)
92410027SChris.Adeniyi-Jones@arm.com{
92513995Sbrandon.potter@amd.com    return openImpl<OS>(desc, callnum, tc, true);
92610027SChris.Adeniyi-Jones@arm.com}
92710027SChris.Adeniyi-Jones@arm.com
92810633Smichaelupton@gmail.com/// Target unlinkat() handler.
92910633Smichaelupton@gmail.comtemplate <class OS>
93010633Smichaelupton@gmail.comSyscallReturn
93113995Sbrandon.potter@amd.comunlinkatFunc(SyscallDesc *desc, int callnum, ThreadContext *tc)
93210633Smichaelupton@gmail.com{
93310633Smichaelupton@gmail.com    int index = 0;
93413995Sbrandon.potter@amd.com    auto process = tc->getProcessPtr();
93510633Smichaelupton@gmail.com    int dirfd = process->getSyscallArg(tc, index);
93610633Smichaelupton@gmail.com    if (dirfd != OS::TGT_AT_FDCWD)
93710633Smichaelupton@gmail.com        warn("unlinkat: first argument not AT_FDCWD; unlikely to work");
93810633Smichaelupton@gmail.com
93913995Sbrandon.potter@amd.com    return unlinkHelper(desc, callnum, tc, 1);
94010633Smichaelupton@gmail.com}
94110633Smichaelupton@gmail.com
94210203SAli.Saidi@ARM.com/// Target facessat() handler
94310203SAli.Saidi@ARM.comtemplate <class OS>
94410203SAli.Saidi@ARM.comSyscallReturn
94513995Sbrandon.potter@amd.comfaccessatFunc(SyscallDesc *desc, int callnum, ThreadContext *tc)
94610203SAli.Saidi@ARM.com{
94710203SAli.Saidi@ARM.com    int index = 0;
94813995Sbrandon.potter@amd.com    auto process = tc->getProcessPtr();
94910203SAli.Saidi@ARM.com    int dirfd = process->getSyscallArg(tc, index);
95010203SAli.Saidi@ARM.com    if (dirfd != OS::TGT_AT_FDCWD)
95110203SAli.Saidi@ARM.com        warn("faccessat: first argument not AT_FDCWD; unlikely to work");
95213995Sbrandon.potter@amd.com    return accessFunc(desc, callnum, tc, 1);
95310203SAli.Saidi@ARM.com}
95410203SAli.Saidi@ARM.com
95510203SAli.Saidi@ARM.com/// Target readlinkat() handler
95610203SAli.Saidi@ARM.comtemplate <class OS>
95710203SAli.Saidi@ARM.comSyscallReturn
95813995Sbrandon.potter@amd.comreadlinkatFunc(SyscallDesc *desc, int callnum, ThreadContext *tc)
95910203SAli.Saidi@ARM.com{
96010203SAli.Saidi@ARM.com    int index = 0;
96113995Sbrandon.potter@amd.com    auto process = tc->getProcessPtr();
96210203SAli.Saidi@ARM.com    int dirfd = process->getSyscallArg(tc, index);
96310203SAli.Saidi@ARM.com    if (dirfd != OS::TGT_AT_FDCWD)
96410203SAli.Saidi@ARM.com        warn("openat: first argument not AT_FDCWD; unlikely to work");
96513995Sbrandon.potter@amd.com    return readlinkFunc(desc, callnum, tc, 1);
96610203SAli.Saidi@ARM.com}
96710203SAli.Saidi@ARM.com
96810850SGiacomo.Gabrielli@arm.com/// Target renameat() handler.
96910850SGiacomo.Gabrielli@arm.comtemplate <class OS>
97010850SGiacomo.Gabrielli@arm.comSyscallReturn
97113995Sbrandon.potter@amd.comrenameatFunc(SyscallDesc *desc, int callnum, ThreadContext *tc)
97210850SGiacomo.Gabrielli@arm.com{
97310850SGiacomo.Gabrielli@arm.com    int index = 0;
97413995Sbrandon.potter@amd.com    auto process = tc->getProcessPtr();
97510850SGiacomo.Gabrielli@arm.com
97610850SGiacomo.Gabrielli@arm.com    int olddirfd = process->getSyscallArg(tc, index);
97710850SGiacomo.Gabrielli@arm.com    if (olddirfd != OS::TGT_AT_FDCWD)
97810850SGiacomo.Gabrielli@arm.com        warn("renameat: first argument not AT_FDCWD; unlikely to work");
97910850SGiacomo.Gabrielli@arm.com
98010850SGiacomo.Gabrielli@arm.com    std::string old_name;
98110850SGiacomo.Gabrielli@arm.com
98214024Sgabeblack@google.com    if (!tc->getVirtProxy().tryReadString(old_name,
98310850SGiacomo.Gabrielli@arm.com                                         process->getSyscallArg(tc, index)))
98410850SGiacomo.Gabrielli@arm.com        return -EFAULT;
98510850SGiacomo.Gabrielli@arm.com
98610850SGiacomo.Gabrielli@arm.com    int newdirfd = process->getSyscallArg(tc, index);
98710850SGiacomo.Gabrielli@arm.com    if (newdirfd != OS::TGT_AT_FDCWD)
98810850SGiacomo.Gabrielli@arm.com        warn("renameat: third argument not AT_FDCWD; unlikely to work");
98910850SGiacomo.Gabrielli@arm.com
99010850SGiacomo.Gabrielli@arm.com    std::string new_name;
99110850SGiacomo.Gabrielli@arm.com
99214024Sgabeblack@google.com    if (!tc->getVirtProxy().tryReadString(new_name,
99310850SGiacomo.Gabrielli@arm.com                                         process->getSyscallArg(tc, index)))
99410850SGiacomo.Gabrielli@arm.com        return -EFAULT;
99510850SGiacomo.Gabrielli@arm.com
99613883Sdavid.hashe@amd.com    // Adjust path for cwd and redirection
99713883Sdavid.hashe@amd.com    old_name = process->checkPathRedirect(old_name);
99813883Sdavid.hashe@amd.com    new_name = process->checkPathRedirect(new_name);
99910850SGiacomo.Gabrielli@arm.com
100010850SGiacomo.Gabrielli@arm.com    int result = rename(old_name.c_str(), new_name.c_str());
100110850SGiacomo.Gabrielli@arm.com    return (result == -1) ? -errno : result;
100210850SGiacomo.Gabrielli@arm.com}
100310850SGiacomo.Gabrielli@arm.com
10046640Svince@csl.cornell.edu/// Target sysinfo() handler.
10056640Svince@csl.cornell.edutemplate <class OS>
10066640Svince@csl.cornell.eduSyscallReturn
100713995Sbrandon.potter@amd.comsysinfoFunc(SyscallDesc *desc, int callnum, ThreadContext *tc)
10086640Svince@csl.cornell.edu{
10096701Sgblack@eecs.umich.edu    int index = 0;
101013995Sbrandon.potter@amd.com    auto process = tc->getProcessPtr();
101113995Sbrandon.potter@amd.com
10126701Sgblack@eecs.umich.edu    TypedBufferArg<typename OS::tgt_sysinfo>
101310793Sbrandon.potter@amd.com        sysinfo(process->getSyscallArg(tc, index));
10146640Svince@csl.cornell.edu
101511758Sbrandon.potter@amd.com    sysinfo->uptime = seconds_since_epoch;
101611758Sbrandon.potter@amd.com    sysinfo->totalram = process->system->memSize();
101711758Sbrandon.potter@amd.com    sysinfo->mem_unit = 1;
10186640Svince@csl.cornell.edu
101914024Sgabeblack@google.com    sysinfo.copyOut(tc->getVirtProxy());
10206640Svince@csl.cornell.edu
10216701Sgblack@eecs.umich.edu    return 0;
10226640Svince@csl.cornell.edu}
1023360SN/A
10241999SN/A/// Target chmod() handler.
10251999SN/Atemplate <class OS>
10261999SN/ASyscallReturn
102713995Sbrandon.potter@amd.comchmodFunc(SyscallDesc *desc, int callnum, ThreadContext *tc)
10281999SN/A{
10291999SN/A    std::string path;
103013995Sbrandon.potter@amd.com    auto process = tc->getProcessPtr();
10311999SN/A
10326701Sgblack@eecs.umich.edu    int index = 0;
103314024Sgabeblack@google.com    if (!tc->getVirtProxy().tryReadString(path,
10346701Sgblack@eecs.umich.edu                process->getSyscallArg(tc, index))) {
10351999SN/A        return -EFAULT;
10366701Sgblack@eecs.umich.edu    }
10371999SN/A
10386701Sgblack@eecs.umich.edu    uint32_t mode = process->getSyscallArg(tc, index);
10391999SN/A    mode_t hostMode = 0;
10401999SN/A
10411999SN/A    // XXX translate mode flags via OS::something???
10421999SN/A    hostMode = mode;
10431999SN/A
104413883Sdavid.hashe@amd.com    // Adjust path for cwd and redirection
104513883Sdavid.hashe@amd.com    path = process->checkPathRedirect(path);
10463669Sbinkertn@umich.edu
10471999SN/A    // do the chmod
10481999SN/A    int result = chmod(path.c_str(), hostMode);
10491999SN/A    if (result < 0)
10502218SN/A        return -errno;
10511999SN/A
10521999SN/A    return 0;
10531999SN/A}
10541999SN/A
105513570Sbrandon.potter@amd.comtemplate <class OS>
105613570Sbrandon.potter@amd.comSyscallReturn
105713995Sbrandon.potter@amd.compollFunc(SyscallDesc *desc, int num, ThreadContext *tc)
105813570Sbrandon.potter@amd.com{
105913570Sbrandon.potter@amd.com    int index = 0;
106013995Sbrandon.potter@amd.com    auto p = tc->getProcessPtr();
106113570Sbrandon.potter@amd.com    Addr fdsPtr = p->getSyscallArg(tc, index);
106213570Sbrandon.potter@amd.com    int nfds = p->getSyscallArg(tc, index);
106313570Sbrandon.potter@amd.com    int tmout = p->getSyscallArg(tc, index);
106413570Sbrandon.potter@amd.com
106513570Sbrandon.potter@amd.com    BufferArg fdsBuf(fdsPtr, sizeof(struct pollfd) * nfds);
106614024Sgabeblack@google.com    fdsBuf.copyIn(tc->getVirtProxy());
106713570Sbrandon.potter@amd.com
106813570Sbrandon.potter@amd.com    /**
106913570Sbrandon.potter@amd.com     * Record the target file descriptors in a local variable. We need to
107013570Sbrandon.potter@amd.com     * replace them with host file descriptors but we need a temporary copy
107113570Sbrandon.potter@amd.com     * for later. Afterwards, replace each target file descriptor in the
107213570Sbrandon.potter@amd.com     * poll_fd array with its host_fd.
107313570Sbrandon.potter@amd.com     */
107413570Sbrandon.potter@amd.com    int temp_tgt_fds[nfds];
107513570Sbrandon.potter@amd.com    for (index = 0; index < nfds; index++) {
107613570Sbrandon.potter@amd.com        temp_tgt_fds[index] = ((struct pollfd *)fdsBuf.bufferPtr())[index].fd;
107713570Sbrandon.potter@amd.com        auto tgt_fd = temp_tgt_fds[index];
107813570Sbrandon.potter@amd.com        auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]);
107913570Sbrandon.potter@amd.com        if (!hbfdp)
108013570Sbrandon.potter@amd.com            return -EBADF;
108113570Sbrandon.potter@amd.com        auto host_fd = hbfdp->getSimFD();
108213570Sbrandon.potter@amd.com        ((struct pollfd *)fdsBuf.bufferPtr())[index].fd = host_fd;
108313570Sbrandon.potter@amd.com    }
108413570Sbrandon.potter@amd.com
108513570Sbrandon.potter@amd.com    /**
108613570Sbrandon.potter@amd.com     * We cannot allow an infinite poll to occur or it will inevitably cause
108713570Sbrandon.potter@amd.com     * a deadlock in the gem5 simulator with clone. We must pass in tmout with
108813570Sbrandon.potter@amd.com     * a non-negative value, however it also makes no sense to poll on the
108913570Sbrandon.potter@amd.com     * underlying host for any other time than tmout a zero timeout.
109013570Sbrandon.potter@amd.com     */
109113570Sbrandon.potter@amd.com    int status;
109213570Sbrandon.potter@amd.com    if (tmout < 0) {
109313570Sbrandon.potter@amd.com        status = poll((struct pollfd *)fdsBuf.bufferPtr(), nfds, 0);
109413570Sbrandon.potter@amd.com        if (status == 0) {
109513570Sbrandon.potter@amd.com            /**
109613570Sbrandon.potter@amd.com             * If blocking indefinitely, check the signal list to see if a
109713570Sbrandon.potter@amd.com             * signal would break the poll out of the retry cycle and try
109813570Sbrandon.potter@amd.com             * to return the signal interrupt instead.
109913570Sbrandon.potter@amd.com             */
110013570Sbrandon.potter@amd.com            System *sysh = tc->getSystemPtr();
110113570Sbrandon.potter@amd.com            std::list<BasicSignal>::iterator it;
110213570Sbrandon.potter@amd.com            for (it=sysh->signalList.begin(); it!=sysh->signalList.end(); it++)
110313570Sbrandon.potter@amd.com                if (it->receiver == p)
110413570Sbrandon.potter@amd.com                    return -EINTR;
110513570Sbrandon.potter@amd.com            return SyscallReturn::retry();
110613570Sbrandon.potter@amd.com        }
110713570Sbrandon.potter@amd.com    } else
110813570Sbrandon.potter@amd.com        status = poll((struct pollfd *)fdsBuf.bufferPtr(), nfds, 0);
110913570Sbrandon.potter@amd.com
111013570Sbrandon.potter@amd.com    if (status == -1)
111113570Sbrandon.potter@amd.com        return -errno;
111213570Sbrandon.potter@amd.com
111313570Sbrandon.potter@amd.com    /**
111413570Sbrandon.potter@amd.com     * Replace each host_fd in the returned poll_fd array with its original
111513570Sbrandon.potter@amd.com     * target file descriptor.
111613570Sbrandon.potter@amd.com     */
111713570Sbrandon.potter@amd.com    for (index = 0; index < nfds; index++) {
111813570Sbrandon.potter@amd.com        auto tgt_fd = temp_tgt_fds[index];
111913570Sbrandon.potter@amd.com        ((struct pollfd *)fdsBuf.bufferPtr())[index].fd = tgt_fd;
112013570Sbrandon.potter@amd.com    }
112113570Sbrandon.potter@amd.com
112213570Sbrandon.potter@amd.com    /**
112313570Sbrandon.potter@amd.com     * Copy out the pollfd struct because the host may have updated fields
112413570Sbrandon.potter@amd.com     * in the structure.
112513570Sbrandon.potter@amd.com     */
112614024Sgabeblack@google.com    fdsBuf.copyOut(tc->getVirtProxy());
112713570Sbrandon.potter@amd.com
112813570Sbrandon.potter@amd.com    return status;
112913570Sbrandon.potter@amd.com}
11301999SN/A
11311999SN/A/// Target fchmod() handler.
11321999SN/Atemplate <class OS>
11331999SN/ASyscallReturn
113413995Sbrandon.potter@amd.comfchmodFunc(SyscallDesc *desc, int callnum, ThreadContext *tc)
11351999SN/A{
11366701Sgblack@eecs.umich.edu    int index = 0;
113713995Sbrandon.potter@amd.com    auto p = tc->getProcessPtr();
113811856Sbrandon.potter@amd.com    int tgt_fd = p->getSyscallArg(tc, index);
113911856Sbrandon.potter@amd.com    uint32_t mode = p->getSyscallArg(tc, index);
114010931Sbrandon.potter@amd.com
114111856Sbrandon.potter@amd.com    auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]);
114211856Sbrandon.potter@amd.com    if (!ffdp)
11431999SN/A        return -EBADF;
114411856Sbrandon.potter@amd.com    int sim_fd = ffdp->getSimFD();
11451999SN/A
114611856Sbrandon.potter@amd.com    mode_t hostMode = mode;
11471999SN/A
114811856Sbrandon.potter@amd.com    int result = fchmod(sim_fd, hostMode);
11491999SN/A
115011856Sbrandon.potter@amd.com    return (result < 0) ? -errno : 0;
11511999SN/A}
11521999SN/A
11535877Shsul@eecs.umich.edu/// Target mremap() handler.
11545877Shsul@eecs.umich.edutemplate <class OS>
11555877Shsul@eecs.umich.eduSyscallReturn
115613995Sbrandon.potter@amd.commremapFunc(SyscallDesc *desc, int callnum, ThreadContext *tc)
11575877Shsul@eecs.umich.edu{
11586701Sgblack@eecs.umich.edu    int index = 0;
115913995Sbrandon.potter@amd.com    auto process = tc->getProcessPtr();
11606701Sgblack@eecs.umich.edu    Addr start = process->getSyscallArg(tc, index);
11616701Sgblack@eecs.umich.edu    uint64_t old_length = process->getSyscallArg(tc, index);
11626701Sgblack@eecs.umich.edu    uint64_t new_length = process->getSyscallArg(tc, index);
11636701Sgblack@eecs.umich.edu    uint64_t flags = process->getSyscallArg(tc, index);
116410027SChris.Adeniyi-Jones@arm.com    uint64_t provided_address = 0;
116510027SChris.Adeniyi-Jones@arm.com    bool use_provided_address = flags & OS::TGT_MREMAP_FIXED;
116610027SChris.Adeniyi-Jones@arm.com
116710027SChris.Adeniyi-Jones@arm.com    if (use_provided_address)
116810027SChris.Adeniyi-Jones@arm.com        provided_address = process->getSyscallArg(tc, index);
11695877Shsul@eecs.umich.edu
117010318Sandreas.hansson@arm.com    if ((start % TheISA::PageBytes != 0) ||
117110318Sandreas.hansson@arm.com        (provided_address % TheISA::PageBytes != 0)) {
11725877Shsul@eecs.umich.edu        warn("mremap failing: arguments not page aligned");
11735877Shsul@eecs.umich.edu        return -EINVAL;
11745877Shsul@eecs.umich.edu    }
11755877Shsul@eecs.umich.edu
117610486Stjablin@gmail.com    new_length = roundUp(new_length, TheISA::PageBytes);
117710486Stjablin@gmail.com
11785877Shsul@eecs.umich.edu    if (new_length > old_length) {
117911905SBrandon.Potter@amd.com        std::shared_ptr<MemState> mem_state = process->memState;
118011905SBrandon.Potter@amd.com        Addr mmap_end = mem_state->getMmapEnd();
118111905SBrandon.Potter@amd.com
118211905SBrandon.Potter@amd.com        if ((start + old_length) == mmap_end &&
118310027SChris.Adeniyi-Jones@arm.com            (!use_provided_address || provided_address == start)) {
118412206Srico.amslinger@informatik.uni-augsburg.de            // This case cannot occur when growing downward, as
118512206Srico.amslinger@informatik.uni-augsburg.de            // start is greater than or equal to mmap_end.
11865877Shsul@eecs.umich.edu            uint64_t diff = new_length - old_length;
118711905SBrandon.Potter@amd.com            process->allocateMem(mmap_end, diff);
118811905SBrandon.Potter@amd.com            mem_state->setMmapEnd(mmap_end + diff);
11895877Shsul@eecs.umich.edu            return start;
11905877Shsul@eecs.umich.edu        } else {
119110027SChris.Adeniyi-Jones@arm.com            if (!use_provided_address && !(flags & OS::TGT_MREMAP_MAYMOVE)) {
11925877Shsul@eecs.umich.edu                warn("can't remap here and MREMAP_MAYMOVE flag not set\n");
11935877Shsul@eecs.umich.edu                return -ENOMEM;
11945877Shsul@eecs.umich.edu            } else {
119512206Srico.amslinger@informatik.uni-augsburg.de                uint64_t new_start = provided_address;
119612206Srico.amslinger@informatik.uni-augsburg.de                if (!use_provided_address) {
119712206Srico.amslinger@informatik.uni-augsburg.de                    new_start = process->mmapGrowsDown() ?
119812206Srico.amslinger@informatik.uni-augsburg.de                                mmap_end - new_length : mmap_end;
119912206Srico.amslinger@informatik.uni-augsburg.de                    mmap_end = process->mmapGrowsDown() ?
120012206Srico.amslinger@informatik.uni-augsburg.de                               new_start : mmap_end + new_length;
120112206Srico.amslinger@informatik.uni-augsburg.de                    mem_state->setMmapEnd(mmap_end);
120212206Srico.amslinger@informatik.uni-augsburg.de                }
120312206Srico.amslinger@informatik.uni-augsburg.de
120410027SChris.Adeniyi-Jones@arm.com                process->pTable->remap(start, old_length, new_start);
120510027SChris.Adeniyi-Jones@arm.com                warn("mremapping to new vaddr %08p-%08p, adding %d\n",
120610027SChris.Adeniyi-Jones@arm.com                     new_start, new_start + new_length,
120710027SChris.Adeniyi-Jones@arm.com                     new_length - old_length);
12085877Shsul@eecs.umich.edu                // add on the remaining unallocated pages
120910027SChris.Adeniyi-Jones@arm.com                process->allocateMem(new_start + old_length,
121010027SChris.Adeniyi-Jones@arm.com                                     new_length - old_length,
121110027SChris.Adeniyi-Jones@arm.com                                     use_provided_address /* clobber */);
121210027SChris.Adeniyi-Jones@arm.com                if (use_provided_address &&
121312206Srico.amslinger@informatik.uni-augsburg.de                    ((new_start + new_length > mem_state->getMmapEnd() &&
121412206Srico.amslinger@informatik.uni-augsburg.de                      !process->mmapGrowsDown()) ||
121512206Srico.amslinger@informatik.uni-augsburg.de                    (new_start < mem_state->getMmapEnd() &&
121612206Srico.amslinger@informatik.uni-augsburg.de                      process->mmapGrowsDown()))) {
121710027SChris.Adeniyi-Jones@arm.com                    // something fishy going on here, at least notify the user
121810027SChris.Adeniyi-Jones@arm.com                    // @todo: increase mmap_end?
121910027SChris.Adeniyi-Jones@arm.com                    warn("mmap region limit exceeded with MREMAP_FIXED\n");
122010027SChris.Adeniyi-Jones@arm.com                }
122110027SChris.Adeniyi-Jones@arm.com                warn("returning %08p as start\n", new_start);
122210027SChris.Adeniyi-Jones@arm.com                return new_start;
12235877Shsul@eecs.umich.edu            }
12245877Shsul@eecs.umich.edu        }
12255877Shsul@eecs.umich.edu    } else {
122610027SChris.Adeniyi-Jones@arm.com        if (use_provided_address && provided_address != start)
122710027SChris.Adeniyi-Jones@arm.com            process->pTable->remap(start, new_length, provided_address);
12288601Ssteve.reinhardt@amd.com        process->pTable->unmap(start + new_length, old_length - new_length);
122910027SChris.Adeniyi-Jones@arm.com        return use_provided_address ? provided_address : start;
12305877Shsul@eecs.umich.edu    }
12315877Shsul@eecs.umich.edu}
12321999SN/A
1233378SN/A/// Target stat() handler.
1234360SN/Atemplate <class OS>
12351450SN/ASyscallReturn
123613995Sbrandon.potter@amd.comstatFunc(SyscallDesc *desc, int callnum, ThreadContext *tc)
1237360SN/A{
1238360SN/A    std::string path;
123913995Sbrandon.potter@amd.com    auto process = tc->getProcessPtr();
1240360SN/A
12416701Sgblack@eecs.umich.edu    int index = 0;
124214024Sgabeblack@google.com    if (!tc->getVirtProxy().tryReadString(path,
12436701Sgblack@eecs.umich.edu                process->getSyscallArg(tc, index))) {
12446701Sgblack@eecs.umich.edu        return -EFAULT;
12456701Sgblack@eecs.umich.edu    }
12466701Sgblack@eecs.umich.edu    Addr bufPtr = process->getSyscallArg(tc, index);
1247360SN/A
124813883Sdavid.hashe@amd.com    // Adjust path for cwd and redirection
124913883Sdavid.hashe@amd.com    path = process->checkPathRedirect(path);
12503669Sbinkertn@umich.edu
1251360SN/A    struct stat hostBuf;
1252360SN/A    int result = stat(path.c_str(), &hostBuf);
1253360SN/A
1254360SN/A    if (result < 0)
12552218SN/A        return -errno;
1256360SN/A
125714024Sgabeblack@google.com    copyOutStatBuf<OS>(tc->getVirtProxy(), bufPtr, &hostBuf);
1258360SN/A
12591458SN/A    return 0;
1260360SN/A}
1261360SN/A
1262360SN/A
12635074Ssaidi@eecs.umich.edu/// Target stat64() handler.
12645074Ssaidi@eecs.umich.edutemplate <class OS>
12655074Ssaidi@eecs.umich.eduSyscallReturn
126613995Sbrandon.potter@amd.comstat64Func(SyscallDesc *desc, int callnum, ThreadContext *tc)
12675074Ssaidi@eecs.umich.edu{
12685074Ssaidi@eecs.umich.edu    std::string path;
126913995Sbrandon.potter@amd.com    auto process = tc->getProcessPtr();
12705074Ssaidi@eecs.umich.edu
12716701Sgblack@eecs.umich.edu    int index = 0;
127214024Sgabeblack@google.com    if (!tc->getVirtProxy().tryReadString(path,
12736701Sgblack@eecs.umich.edu                process->getSyscallArg(tc, index)))
12745074Ssaidi@eecs.umich.edu        return -EFAULT;
12756701Sgblack@eecs.umich.edu    Addr bufPtr = process->getSyscallArg(tc, index);
12765074Ssaidi@eecs.umich.edu
127713883Sdavid.hashe@amd.com    // Adjust path for cwd and redirection
127813883Sdavid.hashe@amd.com    path = process->checkPathRedirect(path);
12795074Ssaidi@eecs.umich.edu
12805208Ssaidi@eecs.umich.edu#if NO_STAT64
12815208Ssaidi@eecs.umich.edu    struct stat  hostBuf;
12825208Ssaidi@eecs.umich.edu    int result = stat(path.c_str(), &hostBuf);
12835208Ssaidi@eecs.umich.edu#else
12845074Ssaidi@eecs.umich.edu    struct stat64 hostBuf;
12855074Ssaidi@eecs.umich.edu    int result = stat64(path.c_str(), &hostBuf);
12865208Ssaidi@eecs.umich.edu#endif
12875074Ssaidi@eecs.umich.edu
12885074Ssaidi@eecs.umich.edu    if (result < 0)
12895074Ssaidi@eecs.umich.edu        return -errno;
12905074Ssaidi@eecs.umich.edu
129114024Sgabeblack@google.com    copyOutStat64Buf<OS>(tc->getVirtProxy(), bufPtr, &hostBuf);
12925074Ssaidi@eecs.umich.edu
12935074Ssaidi@eecs.umich.edu    return 0;
12945074Ssaidi@eecs.umich.edu}
12955074Ssaidi@eecs.umich.edu
12965074Ssaidi@eecs.umich.edu
129710027SChris.Adeniyi-Jones@arm.com/// Target fstatat64() handler.
129810027SChris.Adeniyi-Jones@arm.comtemplate <class OS>
129910027SChris.Adeniyi-Jones@arm.comSyscallReturn
130013995Sbrandon.potter@amd.comfstatat64Func(SyscallDesc *desc, int callnum, ThreadContext *tc)
130110027SChris.Adeniyi-Jones@arm.com{
130210027SChris.Adeniyi-Jones@arm.com    int index = 0;
130313995Sbrandon.potter@amd.com    auto process = tc->getProcessPtr();
130410027SChris.Adeniyi-Jones@arm.com    int dirfd = process->getSyscallArg(tc, index);
130510027SChris.Adeniyi-Jones@arm.com    if (dirfd != OS::TGT_AT_FDCWD)
130610793Sbrandon.potter@amd.com        warn("fstatat64: first argument not AT_FDCWD; unlikely to work");
130710027SChris.Adeniyi-Jones@arm.com
130810027SChris.Adeniyi-Jones@arm.com    std::string path;
130914024Sgabeblack@google.com    if (!tc->getVirtProxy().tryReadString(path,
131010027SChris.Adeniyi-Jones@arm.com                process->getSyscallArg(tc, index)))
131110027SChris.Adeniyi-Jones@arm.com        return -EFAULT;
131210027SChris.Adeniyi-Jones@arm.com    Addr bufPtr = process->getSyscallArg(tc, index);
131310027SChris.Adeniyi-Jones@arm.com
131413883Sdavid.hashe@amd.com    // Adjust path for cwd and redirection
131513883Sdavid.hashe@amd.com    path = process->checkPathRedirect(path);
131610027SChris.Adeniyi-Jones@arm.com
131710027SChris.Adeniyi-Jones@arm.com#if NO_STAT64
131810027SChris.Adeniyi-Jones@arm.com    struct stat  hostBuf;
131910027SChris.Adeniyi-Jones@arm.com    int result = stat(path.c_str(), &hostBuf);
132010027SChris.Adeniyi-Jones@arm.com#else
132110027SChris.Adeniyi-Jones@arm.com    struct stat64 hostBuf;
132210027SChris.Adeniyi-Jones@arm.com    int result = stat64(path.c_str(), &hostBuf);
132310027SChris.Adeniyi-Jones@arm.com#endif
132410027SChris.Adeniyi-Jones@arm.com
132510027SChris.Adeniyi-Jones@arm.com    if (result < 0)
132610027SChris.Adeniyi-Jones@arm.com        return -errno;
132710027SChris.Adeniyi-Jones@arm.com
132814024Sgabeblack@google.com    copyOutStat64Buf<OS>(tc->getVirtProxy(), bufPtr, &hostBuf);
132910027SChris.Adeniyi-Jones@arm.com
133010027SChris.Adeniyi-Jones@arm.com    return 0;
133110027SChris.Adeniyi-Jones@arm.com}
133210027SChris.Adeniyi-Jones@arm.com
133310027SChris.Adeniyi-Jones@arm.com
13341999SN/A/// Target fstat64() handler.
13351999SN/Atemplate <class OS>
13361999SN/ASyscallReturn
133713995Sbrandon.potter@amd.comfstat64Func(SyscallDesc *desc, int callnum, ThreadContext *tc)
13381999SN/A{
13396701Sgblack@eecs.umich.edu    int index = 0;
134013995Sbrandon.potter@amd.com    auto p = tc->getProcessPtr();
134111856Sbrandon.potter@amd.com    int tgt_fd = p->getSyscallArg(tc, index);
134211856Sbrandon.potter@amd.com    Addr bufPtr = p->getSyscallArg(tc, index);
134310931Sbrandon.potter@amd.com
134414120Sbrandon.potter@amd.com    auto ffdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]);
134511856Sbrandon.potter@amd.com    if (!ffdp)
13461999SN/A        return -EBADF;
134711856Sbrandon.potter@amd.com    int sim_fd = ffdp->getSimFD();
13481999SN/A
13492764Sstever@eecs.umich.edu#if NO_STAT64
13502064SN/A    struct stat  hostBuf;
135110931Sbrandon.potter@amd.com    int result = fstat(sim_fd, &hostBuf);
13522064SN/A#else
13532064SN/A    struct stat64  hostBuf;
135410931Sbrandon.potter@amd.com    int result = fstat64(sim_fd, &hostBuf);
13552064SN/A#endif
13561999SN/A
13571999SN/A    if (result < 0)
13582218SN/A        return -errno;
13591999SN/A
136014024Sgabeblack@google.com    copyOutStat64Buf<OS>(tc->getVirtProxy(), bufPtr, &hostBuf, (sim_fd == 1));
13611999SN/A
13621999SN/A    return 0;
13631999SN/A}
13641999SN/A
13651999SN/A
1366378SN/A/// Target lstat() handler.
1367360SN/Atemplate <class OS>
13681450SN/ASyscallReturn
136913995Sbrandon.potter@amd.comlstatFunc(SyscallDesc *desc, int callnum, ThreadContext *tc)
1370360SN/A{
1371360SN/A    std::string path;
137213995Sbrandon.potter@amd.com    auto process = tc->getProcessPtr();
1373360SN/A
13746701Sgblack@eecs.umich.edu    int index = 0;
137514024Sgabeblack@google.com    if (!tc->getVirtProxy().tryReadString(path,
13766701Sgblack@eecs.umich.edu                process->getSyscallArg(tc, index))) {
13776701Sgblack@eecs.umich.edu        return -EFAULT;
13786701Sgblack@eecs.umich.edu    }
13796701Sgblack@eecs.umich.edu    Addr bufPtr = process->getSyscallArg(tc, index);
1380360SN/A
138113883Sdavid.hashe@amd.com    // Adjust path for cwd and redirection
138213883Sdavid.hashe@amd.com    path = process->checkPathRedirect(path);
13833669Sbinkertn@umich.edu
1384360SN/A    struct stat hostBuf;
1385360SN/A    int result = lstat(path.c_str(), &hostBuf);
1386360SN/A
1387360SN/A    if (result < 0)
13881458SN/A        return -errno;
1389360SN/A
139014024Sgabeblack@google.com    copyOutStatBuf<OS>(tc->getVirtProxy(), bufPtr, &hostBuf);
1391360SN/A
13921458SN/A    return 0;
1393360SN/A}
1394360SN/A
13951999SN/A/// Target lstat64() handler.
13961999SN/Atemplate <class OS>
13971999SN/ASyscallReturn
139813995Sbrandon.potter@amd.comlstat64Func(SyscallDesc *desc, int callnum, ThreadContext *tc)
13991999SN/A{
14001999SN/A    std::string path;
140113995Sbrandon.potter@amd.com    auto process = tc->getProcessPtr();
14021999SN/A
14036701Sgblack@eecs.umich.edu    int index = 0;
140414024Sgabeblack@google.com    if (!tc->getVirtProxy().tryReadString(path,
14056701Sgblack@eecs.umich.edu                process->getSyscallArg(tc, index))) {
14066701Sgblack@eecs.umich.edu        return -EFAULT;
14076701Sgblack@eecs.umich.edu    }
14086701Sgblack@eecs.umich.edu    Addr bufPtr = process->getSyscallArg(tc, index);
14091999SN/A
141013883Sdavid.hashe@amd.com    // Adjust path for cwd and redirection
141113883Sdavid.hashe@amd.com    path = process->checkPathRedirect(path);
14123669Sbinkertn@umich.edu
14132764Sstever@eecs.umich.edu#if NO_STAT64
14142064SN/A    struct stat hostBuf;
14152064SN/A    int result = lstat(path.c_str(), &hostBuf);
14162064SN/A#else
14171999SN/A    struct stat64 hostBuf;
14181999SN/A    int result = lstat64(path.c_str(), &hostBuf);
14192064SN/A#endif
14201999SN/A
14211999SN/A    if (result < 0)
14221999SN/A        return -errno;
14231999SN/A
142414024Sgabeblack@google.com    copyOutStat64Buf<OS>(tc->getVirtProxy(), bufPtr, &hostBuf);
14251999SN/A
14261999SN/A    return 0;
14271999SN/A}
14281999SN/A
1429378SN/A/// Target fstat() handler.
1430360SN/Atemplate <class OS>
14311450SN/ASyscallReturn
143213995Sbrandon.potter@amd.comfstatFunc(SyscallDesc *desc, int callnum, ThreadContext *tc)
1433360SN/A{
14346701Sgblack@eecs.umich.edu    int index = 0;
143513995Sbrandon.potter@amd.com    auto p = tc->getProcessPtr();
143611856Sbrandon.potter@amd.com    int tgt_fd = p->getSyscallArg(tc, index);
143711856Sbrandon.potter@amd.com    Addr bufPtr = p->getSyscallArg(tc, index);
1438360SN/A
143911380Salexandru.dutu@amd.com    DPRINTF_SYSCALL(Verbose, "fstat(%d, ...)\n", tgt_fd);
1440360SN/A
144111856Sbrandon.potter@amd.com    auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]);
144211856Sbrandon.potter@amd.com    if (!ffdp)
14431458SN/A        return -EBADF;
144411856Sbrandon.potter@amd.com    int sim_fd = ffdp->getSimFD();
1445360SN/A
1446360SN/A    struct stat hostBuf;
144710931Sbrandon.potter@amd.com    int result = fstat(sim_fd, &hostBuf);
1448360SN/A
1449360SN/A    if (result < 0)
14501458SN/A        return -errno;
1451360SN/A
145214024Sgabeblack@google.com    copyOutStatBuf<OS>(tc->getVirtProxy(), bufPtr, &hostBuf, (sim_fd == 1));
14532021SN/A
14541458SN/A    return 0;
1455360SN/A}
1456360SN/A
14571706SN/A/// Target statfs() handler.
14581706SN/Atemplate <class OS>
14591706SN/ASyscallReturn
146013995Sbrandon.potter@amd.comstatfsFunc(SyscallDesc *desc, int callnum, ThreadContext *tc)
14611706SN/A{
146213936SAndrea.Mondelli@ucf.edu#if defined(__linux__)
14631706SN/A    std::string path;
146413995Sbrandon.potter@amd.com    auto process = tc->getProcessPtr();
14651706SN/A
14666701Sgblack@eecs.umich.edu    int index = 0;
146714024Sgabeblack@google.com    if (!tc->getVirtProxy().tryReadString(path,
14686701Sgblack@eecs.umich.edu                process->getSyscallArg(tc, index))) {
14696701Sgblack@eecs.umich.edu        return -EFAULT;
14706701Sgblack@eecs.umich.edu    }
14716701Sgblack@eecs.umich.edu    Addr bufPtr = process->getSyscallArg(tc, index);
14721706SN/A
147313883Sdavid.hashe@amd.com    // Adjust path for cwd and redirection
147413883Sdavid.hashe@amd.com    path = process->checkPathRedirect(path);
14753669Sbinkertn@umich.edu
14761706SN/A    struct statfs hostBuf;
14771706SN/A    int result = statfs(path.c_str(), &hostBuf);
14781706SN/A
14791706SN/A    if (result < 0)
14802218SN/A        return -errno;
14811706SN/A
148214024Sgabeblack@google.com    copyOutStatfsBuf<OS>(tc->getVirtProxy(), bufPtr, &hostBuf);
148313933Sbrandon.potter@amd.com    return 0;
148413933Sbrandon.potter@amd.com#else
148513933Sbrandon.potter@amd.com    warnUnsupportedOS("statfs");
148613933Sbrandon.potter@amd.com    return -1;
148711799Sbrandon.potter@amd.com#endif
14881706SN/A}
14891706SN/A
149011886Sbrandon.potter@amd.comtemplate <class OS>
149111886Sbrandon.potter@amd.comSyscallReturn
149213995Sbrandon.potter@amd.comcloneFunc(SyscallDesc *desc, int callnum, ThreadContext *tc)
149311886Sbrandon.potter@amd.com{
149411886Sbrandon.potter@amd.com    int index = 0;
149512426Sqtt2@cornell.edu
149613995Sbrandon.potter@amd.com    auto p = tc->getProcessPtr();
149713557Sgabeblack@google.com    RegVal flags = p->getSyscallArg(tc, index);
149813557Sgabeblack@google.com    RegVal newStack = p->getSyscallArg(tc, index);
149911886Sbrandon.potter@amd.com    Addr ptidPtr = p->getSyscallArg(tc, index);
150012426Sqtt2@cornell.edu
150113534Sandreas.sandberg@arm.com#if THE_ISA == RISCV_ISA or THE_ISA == ARM_ISA
150212426Sqtt2@cornell.edu    /**
150313534Sandreas.sandberg@arm.com     * Linux sets CLONE_BACKWARDS flag for RISC-V and Arm.
150412426Sqtt2@cornell.edu     * The flag defines the list of clone() arguments in the following
150512426Sqtt2@cornell.edu     * order: flags -> newStack -> ptidPtr -> tlsPtr -> ctidPtr
150612426Sqtt2@cornell.edu     */
150713536Sandreas.sandberg@arm.com    Addr tlsPtr = p->getSyscallArg(tc, index);
150812426Sqtt2@cornell.edu    Addr ctidPtr = p->getSyscallArg(tc, index);
150912426Sqtt2@cornell.edu#else
151011886Sbrandon.potter@amd.com    Addr ctidPtr = p->getSyscallArg(tc, index);
151113536Sandreas.sandberg@arm.com    Addr tlsPtr = p->getSyscallArg(tc, index);
151212426Sqtt2@cornell.edu#endif
151311886Sbrandon.potter@amd.com
151411886Sbrandon.potter@amd.com    if (((flags & OS::TGT_CLONE_SIGHAND)&& !(flags & OS::TGT_CLONE_VM)) ||
151511886Sbrandon.potter@amd.com        ((flags & OS::TGT_CLONE_THREAD) && !(flags & OS::TGT_CLONE_SIGHAND)) ||
151611886Sbrandon.potter@amd.com        ((flags & OS::TGT_CLONE_FS)     &&  (flags & OS::TGT_CLONE_NEWNS)) ||
151711886Sbrandon.potter@amd.com        ((flags & OS::TGT_CLONE_NEWIPC) &&  (flags & OS::TGT_CLONE_SYSVSEM)) ||
151811886Sbrandon.potter@amd.com        ((flags & OS::TGT_CLONE_NEWPID) &&  (flags & OS::TGT_CLONE_THREAD)) ||
151911886Sbrandon.potter@amd.com        ((flags & OS::TGT_CLONE_VM)     && !(newStack)))
152011886Sbrandon.potter@amd.com        return -EINVAL;
152111886Sbrandon.potter@amd.com
152211886Sbrandon.potter@amd.com    ThreadContext *ctc;
152313649Sqtt2@cornell.edu    if (!(ctc = p->findFreeContext())) {
152413649Sqtt2@cornell.edu        DPRINTF_SYSCALL(Verbose, "clone: no spare thread context in system"
152513649Sqtt2@cornell.edu                        "[cpu %d, thread %d]", tc->cpuId(), tc->threadId());
152613649Sqtt2@cornell.edu        return -EAGAIN;
152713649Sqtt2@cornell.edu    }
152811886Sbrandon.potter@amd.com
152911886Sbrandon.potter@amd.com    /**
153011886Sbrandon.potter@amd.com     * Note that ProcessParams is generated by swig and there are no other
153111886Sbrandon.potter@amd.com     * examples of how to create anything but this default constructor. The
153211886Sbrandon.potter@amd.com     * fields are manually initialized instead of passing parameters to the
153311886Sbrandon.potter@amd.com     * constructor.
153411886Sbrandon.potter@amd.com     */
153511886Sbrandon.potter@amd.com    ProcessParams *pp = new ProcessParams();
153611886Sbrandon.potter@amd.com    pp->executable.assign(*(new std::string(p->progName())));
153711886Sbrandon.potter@amd.com    pp->cmd.push_back(*(new std::string(p->progName())));
153811886Sbrandon.potter@amd.com    pp->system = p->system;
153913883Sdavid.hashe@amd.com    pp->cwd.assign(p->tgtCwd);
154011886Sbrandon.potter@amd.com    pp->input.assign("stdin");
154111886Sbrandon.potter@amd.com    pp->output.assign("stdout");
154211886Sbrandon.potter@amd.com    pp->errout.assign("stderr");
154311886Sbrandon.potter@amd.com    pp->uid = p->uid();
154411886Sbrandon.potter@amd.com    pp->euid = p->euid();
154511886Sbrandon.potter@amd.com    pp->gid = p->gid();
154611886Sbrandon.potter@amd.com    pp->egid = p->egid();
154711886Sbrandon.potter@amd.com
154811886Sbrandon.potter@amd.com    /* Find the first free PID that's less than the maximum */
154911886Sbrandon.potter@amd.com    std::set<int> const& pids = p->system->PIDs;
155011886Sbrandon.potter@amd.com    int temp_pid = *pids.begin();
155111886Sbrandon.potter@amd.com    do {
155211886Sbrandon.potter@amd.com        temp_pid++;
155311886Sbrandon.potter@amd.com    } while (pids.find(temp_pid) != pids.end());
155411886Sbrandon.potter@amd.com    if (temp_pid >= System::maxPID)
155511886Sbrandon.potter@amd.com        fatal("temp_pid is too large: %d", temp_pid);
155611886Sbrandon.potter@amd.com
155711886Sbrandon.potter@amd.com    pp->pid = temp_pid;
155811886Sbrandon.potter@amd.com    pp->ppid = (flags & OS::TGT_CLONE_THREAD) ? p->ppid() : p->pid();
155913867Salexandru.dutu@amd.com    pp->useArchPT = p->useArchPT;
156013867Salexandru.dutu@amd.com    pp->kvmInSE = p->kvmInSE;
156111886Sbrandon.potter@amd.com    Process *cp = pp->create();
156211886Sbrandon.potter@amd.com    delete pp;
156311886Sbrandon.potter@amd.com
156411886Sbrandon.potter@amd.com    Process *owner = ctc->getProcessPtr();
156511886Sbrandon.potter@amd.com    ctc->setProcessPtr(cp);
156611886Sbrandon.potter@amd.com    cp->assignThreadContext(ctc->contextId());
156711886Sbrandon.potter@amd.com    owner->revokeThreadContext(ctc->contextId());
156811886Sbrandon.potter@amd.com
156911886Sbrandon.potter@amd.com    if (flags & OS::TGT_CLONE_PARENT_SETTID) {
157011886Sbrandon.potter@amd.com        BufferArg ptidBuf(ptidPtr, sizeof(long));
157111886Sbrandon.potter@amd.com        long *ptid = (long *)ptidBuf.bufferPtr();
157211886Sbrandon.potter@amd.com        *ptid = cp->pid();
157314024Sgabeblack@google.com        ptidBuf.copyOut(tc->getVirtProxy());
157411886Sbrandon.potter@amd.com    }
157511886Sbrandon.potter@amd.com
157613867Salexandru.dutu@amd.com    if (flags & OS::TGT_CLONE_THREAD) {
157713867Salexandru.dutu@amd.com        cp->pTable->shared = true;
157813867Salexandru.dutu@amd.com        cp->useForClone = true;
157913867Salexandru.dutu@amd.com    }
158011886Sbrandon.potter@amd.com    cp->initState();
158111886Sbrandon.potter@amd.com    p->clone(tc, ctc, cp, flags);
158211886Sbrandon.potter@amd.com
158311911SBrandon.Potter@amd.com    if (flags & OS::TGT_CLONE_THREAD) {
158411911SBrandon.Potter@amd.com        delete cp->sigchld;
158511911SBrandon.Potter@amd.com        cp->sigchld = p->sigchld;
158611911SBrandon.Potter@amd.com    } else if (flags & OS::TGT_SIGCHLD) {
158711911SBrandon.Potter@amd.com        *cp->sigchld = true;
158811911SBrandon.Potter@amd.com    }
158911911SBrandon.Potter@amd.com
159011886Sbrandon.potter@amd.com    if (flags & OS::TGT_CLONE_CHILD_SETTID) {
159111886Sbrandon.potter@amd.com        BufferArg ctidBuf(ctidPtr, sizeof(long));
159211886Sbrandon.potter@amd.com        long *ctid = (long *)ctidBuf.bufferPtr();
159311886Sbrandon.potter@amd.com        *ctid = cp->pid();
159414024Sgabeblack@google.com        ctidBuf.copyOut(ctc->getVirtProxy());
159511886Sbrandon.potter@amd.com    }
159611886Sbrandon.potter@amd.com
159711886Sbrandon.potter@amd.com    if (flags & OS::TGT_CLONE_CHILD_CLEARTID)
159811886Sbrandon.potter@amd.com        cp->childClearTID = (uint64_t)ctidPtr;
159911886Sbrandon.potter@amd.com
160011886Sbrandon.potter@amd.com    ctc->clearArchRegs();
160111886Sbrandon.potter@amd.com
160213536Sandreas.sandberg@arm.com    OS::archClone(flags, p, cp, tc, ctc, newStack, tlsPtr);
160311886Sbrandon.potter@amd.com
160411886Sbrandon.potter@amd.com    cp->setSyscallReturn(ctc, 0);
160511886Sbrandon.potter@amd.com
160611886Sbrandon.potter@amd.com#if THE_ISA == ALPHA_ISA
160711886Sbrandon.potter@amd.com    ctc->setIntReg(TheISA::SyscallSuccessReg, 0);
160811886Sbrandon.potter@amd.com#elif THE_ISA == SPARC_ISA
160911886Sbrandon.potter@amd.com    tc->setIntReg(TheISA::SyscallPseudoReturnReg, 0);
161011886Sbrandon.potter@amd.com    ctc->setIntReg(TheISA::SyscallPseudoReturnReg, 1);
161111886Sbrandon.potter@amd.com#endif
161211886Sbrandon.potter@amd.com
161313867Salexandru.dutu@amd.com    if (p->kvmInSE) {
161413867Salexandru.dutu@amd.com#if THE_ISA == X86_ISA
161513867Salexandru.dutu@amd.com        ctc->pcState(tc->readIntReg(TheISA::INTREG_RCX));
161613867Salexandru.dutu@amd.com#else
161713867Salexandru.dutu@amd.com        panic("KVM CPU model is not supported for this ISA");
161813867Salexandru.dutu@amd.com#endif
161913867Salexandru.dutu@amd.com    } else {
162013867Salexandru.dutu@amd.com        TheISA::PCState cpc = tc->pcState();
162113867Salexandru.dutu@amd.com        cpc.advance();
162213867Salexandru.dutu@amd.com        ctc->pcState(cpc);
162313867Salexandru.dutu@amd.com    }
162411886Sbrandon.potter@amd.com    ctc->activate();
162511886Sbrandon.potter@amd.com
162611886Sbrandon.potter@amd.com    return cp->pid();
162711886Sbrandon.potter@amd.com}
16281706SN/A
16291706SN/A/// Target fstatfs() handler.
16301706SN/Atemplate <class OS>
16311706SN/ASyscallReturn
163213995Sbrandon.potter@amd.comfstatfsFunc(SyscallDesc *desc, int callnum, ThreadContext *tc)
16331706SN/A{
16346701Sgblack@eecs.umich.edu    int index = 0;
163513995Sbrandon.potter@amd.com    auto p = tc->getProcessPtr();
163611856Sbrandon.potter@amd.com    int tgt_fd = p->getSyscallArg(tc, index);
163711856Sbrandon.potter@amd.com    Addr bufPtr = p->getSyscallArg(tc, index);
16381706SN/A
163911856Sbrandon.potter@amd.com    auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]);
164011856Sbrandon.potter@amd.com    if (!ffdp)
16411706SN/A        return -EBADF;
164211856Sbrandon.potter@amd.com    int sim_fd = ffdp->getSimFD();
16431706SN/A
16441706SN/A    struct statfs hostBuf;
164510931Sbrandon.potter@amd.com    int result = fstatfs(sim_fd, &hostBuf);
16461706SN/A
16471706SN/A    if (result < 0)
16482218SN/A        return -errno;
16491706SN/A
165014024Sgabeblack@google.com    copyOutStatfsBuf<OS>(tc->getVirtProxy(), bufPtr, &hostBuf);
16511706SN/A
16521706SN/A    return 0;
16531706SN/A}
16541706SN/A
165513572Sbrandon.potter@amd.com/// Target readv() handler.
165613572Sbrandon.potter@amd.comtemplate <class OS>
165713572Sbrandon.potter@amd.comSyscallReturn
165813995Sbrandon.potter@amd.comreadvFunc(SyscallDesc *desc, int callnum, ThreadContext *tc)
165913572Sbrandon.potter@amd.com{
166013572Sbrandon.potter@amd.com    int index = 0;
166113995Sbrandon.potter@amd.com    auto p = tc->getProcessPtr();
166213572Sbrandon.potter@amd.com    int tgt_fd = p->getSyscallArg(tc, index);
166313572Sbrandon.potter@amd.com
166413572Sbrandon.potter@amd.com    auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]);
166513572Sbrandon.potter@amd.com    if (!ffdp)
166613572Sbrandon.potter@amd.com        return -EBADF;
166713572Sbrandon.potter@amd.com    int sim_fd = ffdp->getSimFD();
166813572Sbrandon.potter@amd.com
166914024Sgabeblack@google.com    PortProxy &prox = tc->getVirtProxy();
167013572Sbrandon.potter@amd.com    uint64_t tiov_base = p->getSyscallArg(tc, index);
167113572Sbrandon.potter@amd.com    size_t count = p->getSyscallArg(tc, index);
167213572Sbrandon.potter@amd.com    typename OS::tgt_iovec tiov[count];
167313572Sbrandon.potter@amd.com    struct iovec hiov[count];
167413572Sbrandon.potter@amd.com    for (size_t i = 0; i < count; ++i) {
167513572Sbrandon.potter@amd.com        prox.readBlob(tiov_base + (i * sizeof(typename OS::tgt_iovec)),
167614010Sgabeblack@google.com                      &tiov[i], sizeof(typename OS::tgt_iovec));
167713572Sbrandon.potter@amd.com        hiov[i].iov_len = TheISA::gtoh(tiov[i].iov_len);
167813572Sbrandon.potter@amd.com        hiov[i].iov_base = new char [hiov[i].iov_len];
167913572Sbrandon.potter@amd.com    }
168013572Sbrandon.potter@amd.com
168113572Sbrandon.potter@amd.com    int result = readv(sim_fd, hiov, count);
168213572Sbrandon.potter@amd.com    int local_errno = errno;
168313572Sbrandon.potter@amd.com
168413572Sbrandon.potter@amd.com    for (size_t i = 0; i < count; ++i) {
168513572Sbrandon.potter@amd.com        if (result != -1) {
168613572Sbrandon.potter@amd.com            prox.writeBlob(TheISA::htog(tiov[i].iov_base),
168714010Sgabeblack@google.com                           hiov[i].iov_base, hiov[i].iov_len);
168813572Sbrandon.potter@amd.com        }
168913572Sbrandon.potter@amd.com        delete [] (char *)hiov[i].iov_base;
169013572Sbrandon.potter@amd.com    }
169113572Sbrandon.potter@amd.com
169213572Sbrandon.potter@amd.com    return (result == -1) ? -local_errno : result;
169313572Sbrandon.potter@amd.com}
16941706SN/A
16951999SN/A/// Target writev() handler.
16961999SN/Atemplate <class OS>
16971999SN/ASyscallReturn
169813995Sbrandon.potter@amd.comwritevFunc(SyscallDesc *desc, int callnum, ThreadContext *tc)
16991999SN/A{
17006701Sgblack@eecs.umich.edu    int index = 0;
170113995Sbrandon.potter@amd.com    auto p = tc->getProcessPtr();
170211856Sbrandon.potter@amd.com    int tgt_fd = p->getSyscallArg(tc, index);
170310931Sbrandon.potter@amd.com
170411856Sbrandon.potter@amd.com    auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]);
170511856Sbrandon.potter@amd.com    if (!hbfdp)
17061999SN/A        return -EBADF;
170711856Sbrandon.potter@amd.com    int sim_fd = hbfdp->getSimFD();
17081999SN/A
170914024Sgabeblack@google.com    PortProxy &prox = tc->getVirtProxy();
171011856Sbrandon.potter@amd.com    uint64_t tiov_base = p->getSyscallArg(tc, index);
171111856Sbrandon.potter@amd.com    size_t count = p->getSyscallArg(tc, index);
17121999SN/A    struct iovec hiov[count];
17136227Snate@binkert.org    for (size_t i = 0; i < count; ++i) {
17141999SN/A        typename OS::tgt_iovec tiov;
17152461SN/A
171611856Sbrandon.potter@amd.com        prox.readBlob(tiov_base + i*sizeof(typename OS::tgt_iovec),
171714010Sgabeblack@google.com                      &tiov, sizeof(typename OS::tgt_iovec));
17188737Skoansin.tan@gmail.com        hiov[i].iov_len = TheISA::gtoh(tiov.iov_len);
17191999SN/A        hiov[i].iov_base = new char [hiov[i].iov_len];
172014010Sgabeblack@google.com        prox.readBlob(TheISA::gtoh(tiov.iov_base), hiov[i].iov_base,
172111856Sbrandon.potter@amd.com                      hiov[i].iov_len);
17221999SN/A    }
17231999SN/A
172410931Sbrandon.potter@amd.com    int result = writev(sim_fd, hiov, count);
17251999SN/A
17266227Snate@binkert.org    for (size_t i = 0; i < count; ++i)
17271999SN/A        delete [] (char *)hiov[i].iov_base;
17281999SN/A
172913572Sbrandon.potter@amd.com    return (result == -1) ? -errno : result;
17301999SN/A}
17311999SN/A
173211385Sbrandon.potter@amd.com/// Real mmap handler.
1733360SN/Atemplate <class OS>
17341450SN/ASyscallReturn
173513995Sbrandon.potter@amd.commmapImpl(SyscallDesc *desc, int num, ThreadContext *tc, bool is_mmap2)
1736360SN/A{
17376701Sgblack@eecs.umich.edu    int index = 0;
173813995Sbrandon.potter@amd.com    auto p = tc->getProcessPtr();
17396701Sgblack@eecs.umich.edu    Addr start = p->getSyscallArg(tc, index);
17406701Sgblack@eecs.umich.edu    uint64_t length = p->getSyscallArg(tc, index);
174111383Sbrandon.potter@amd.com    int prot = p->getSyscallArg(tc, index);
174211383Sbrandon.potter@amd.com    int tgt_flags = p->getSyscallArg(tc, index);
17438324Ssteve.reinhardt@amd.com    int tgt_fd = p->getSyscallArg(tc, index);
174410486Stjablin@gmail.com    int offset = p->getSyscallArg(tc, index);
1745360SN/A
174611385Sbrandon.potter@amd.com    if (is_mmap2)
174711385Sbrandon.potter@amd.com        offset *= TheISA::PageBytes;
17489008Sgblack@eecs.umich.edu
174911383Sbrandon.potter@amd.com    if (start & (TheISA::PageBytes - 1) ||
175011383Sbrandon.potter@amd.com        offset & (TheISA::PageBytes - 1) ||
175111383Sbrandon.potter@amd.com        (tgt_flags & OS::TGT_MAP_PRIVATE &&
175211383Sbrandon.potter@amd.com         tgt_flags & OS::TGT_MAP_SHARED) ||
175311383Sbrandon.potter@amd.com        (!(tgt_flags & OS::TGT_MAP_PRIVATE) &&
175411383Sbrandon.potter@amd.com         !(tgt_flags & OS::TGT_MAP_SHARED)) ||
175511383Sbrandon.potter@amd.com        !length) {
175611383Sbrandon.potter@amd.com        return -EINVAL;
175711383Sbrandon.potter@amd.com    }
17588324Ssteve.reinhardt@amd.com
175911383Sbrandon.potter@amd.com    if ((prot & PROT_WRITE) && (tgt_flags & OS::TGT_MAP_SHARED)) {
176011383Sbrandon.potter@amd.com        // With shared mmaps, there are two cases to consider:
176111383Sbrandon.potter@amd.com        // 1) anonymous: writes should modify the mapping and this should be
176211383Sbrandon.potter@amd.com        // visible to observers who share the mapping. Currently, it's
176311383Sbrandon.potter@amd.com        // difficult to update the shared mapping because there's no
176411383Sbrandon.potter@amd.com        // structure which maintains information about the which virtual
176511383Sbrandon.potter@amd.com        // memory areas are shared. If that structure existed, it would be
176611383Sbrandon.potter@amd.com        // possible to make the translations point to the same frames.
176711383Sbrandon.potter@amd.com        // 2) file-backed: writes should modify the mapping and the file
176811383Sbrandon.potter@amd.com        // which is backed by the mapping. The shared mapping problem is the
176911383Sbrandon.potter@amd.com        // same as what was mentioned about the anonymous mappings. For
177011383Sbrandon.potter@amd.com        // file-backed mappings, the writes to the file are difficult
177111383Sbrandon.potter@amd.com        // because it requires syncing what the mapping holds with the file
177211383Sbrandon.potter@amd.com        // that resides on the host system. So, any write on a real system
177311383Sbrandon.potter@amd.com        // would cause the change to be propagated to the file mapping at
177411383Sbrandon.potter@amd.com        // some point in the future (the inode is tracked along with the
177511383Sbrandon.potter@amd.com        // mapping). This isn't guaranteed to always happen, but it usually
177611383Sbrandon.potter@amd.com        // works well enough. The guarantee is provided by the msync system
177711383Sbrandon.potter@amd.com        // call. We could force the change through with shared mappings with
177811383Sbrandon.potter@amd.com        // a call to msync, but that again would require more information
177911383Sbrandon.potter@amd.com        // than we currently maintain.
178011383Sbrandon.potter@amd.com        warn("mmap: writing to shared mmap region is currently "
178111383Sbrandon.potter@amd.com             "unsupported. The write succeeds on the target, but it "
178211383Sbrandon.potter@amd.com             "will not be propagated to the host or shared mappings");
17838324Ssteve.reinhardt@amd.com    }
17845877Shsul@eecs.umich.edu
178510486Stjablin@gmail.com    length = roundUp(length, TheISA::PageBytes);
178610486Stjablin@gmail.com
178711383Sbrandon.potter@amd.com    int sim_fd = -1;
178811383Sbrandon.potter@amd.com    uint8_t *pmap = nullptr;
178911383Sbrandon.potter@amd.com    if (!(tgt_flags & OS::TGT_MAP_ANONYMOUS)) {
179011856Sbrandon.potter@amd.com        std::shared_ptr<FDEntry> fdep = (*p->fds)[tgt_fd];
179111624Smichael.lebeane@amd.com
179211856Sbrandon.potter@amd.com        auto dfdp = std::dynamic_pointer_cast<DeviceFDEntry>(fdep);
179311856Sbrandon.potter@amd.com        if (dfdp) {
179411856Sbrandon.potter@amd.com            EmulatedDriver *emul_driver = dfdp->getDriver();
179513995Sbrandon.potter@amd.com            return emul_driver->mmap(tc, start, length, prot, tgt_flags,
179613995Sbrandon.potter@amd.com                                     tgt_fd, offset);
179711624Smichael.lebeane@amd.com        }
179811624Smichael.lebeane@amd.com
179911856Sbrandon.potter@amd.com        auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(fdep);
180011856Sbrandon.potter@amd.com        if (!ffdp)
180111383Sbrandon.potter@amd.com            return -EBADF;
180211856Sbrandon.potter@amd.com        sim_fd = ffdp->getSimFD();
1803360SN/A
180411913SBrandon.Potter@amd.com        pmap = (decltype(pmap))mmap(nullptr, length, PROT_READ, MAP_PRIVATE,
180511383Sbrandon.potter@amd.com                                    sim_fd, offset);
18068600Ssteve.reinhardt@amd.com
180711383Sbrandon.potter@amd.com        if (pmap == (decltype(pmap))-1) {
180811383Sbrandon.potter@amd.com            warn("mmap: failed to map file into host address space");
180911383Sbrandon.potter@amd.com            return -errno;
18108600Ssteve.reinhardt@amd.com        }
18112544SN/A    }
18122544SN/A
181311383Sbrandon.potter@amd.com    // Extend global mmap region if necessary. Note that we ignore the
181411383Sbrandon.potter@amd.com    // start address unless MAP_FIXED is specified.
181511383Sbrandon.potter@amd.com    if (!(tgt_flags & OS::TGT_MAP_FIXED)) {
181611905SBrandon.Potter@amd.com        std::shared_ptr<MemState> mem_state = p->memState;
181711905SBrandon.Potter@amd.com        Addr mmap_end = mem_state->getMmapEnd();
181811905SBrandon.Potter@amd.com
181911905SBrandon.Potter@amd.com        start = p->mmapGrowsDown() ? mmap_end - length : mmap_end;
182011905SBrandon.Potter@amd.com        mmap_end = p->mmapGrowsDown() ? start : mmap_end + length;
182111905SBrandon.Potter@amd.com
182211905SBrandon.Potter@amd.com        mem_state->setMmapEnd(mmap_end);
182311383Sbrandon.potter@amd.com    }
182411383Sbrandon.potter@amd.com
182511383Sbrandon.potter@amd.com    DPRINTF_SYSCALL(Verbose, " mmap range is 0x%x - 0x%x\n",
182611383Sbrandon.potter@amd.com                    start, start + length - 1);
182711383Sbrandon.potter@amd.com
182811383Sbrandon.potter@amd.com    // We only allow mappings to overwrite existing mappings if
182911383Sbrandon.potter@amd.com    // TGT_MAP_FIXED is set. Otherwise it shouldn't be a problem
183011383Sbrandon.potter@amd.com    // because we ignore the start hint if TGT_MAP_FIXED is not set.
183111383Sbrandon.potter@amd.com    int clobber = tgt_flags & OS::TGT_MAP_FIXED;
183211383Sbrandon.potter@amd.com    if (clobber) {
183311383Sbrandon.potter@amd.com        for (auto tc : p->system->threadContexts) {
183411383Sbrandon.potter@amd.com            // If we might be overwriting old mappings, we need to
183511383Sbrandon.potter@amd.com            // invalidate potentially stale mappings out of the TLBs.
183611383Sbrandon.potter@amd.com            tc->getDTBPtr()->flushAll();
183711383Sbrandon.potter@amd.com            tc->getITBPtr()->flushAll();
18388600Ssteve.reinhardt@amd.com        }
18396672Sgblack@eecs.umich.edu    }
18408600Ssteve.reinhardt@amd.com
184111383Sbrandon.potter@amd.com    // Allocate physical memory and map it in. If the page table is already
184211383Sbrandon.potter@amd.com    // mapped and clobber is not set, the simulator will issue throw a
184311383Sbrandon.potter@amd.com    // fatal and bail out of the simulation.
18448601Ssteve.reinhardt@amd.com    p->allocateMem(start, length, clobber);
18452544SN/A
184611383Sbrandon.potter@amd.com    // Transfer content into target address space.
184714024Sgabeblack@google.com    PortProxy &tp = tc->getVirtProxy();
184811383Sbrandon.potter@amd.com    if (tgt_flags & OS::TGT_MAP_ANONYMOUS) {
184911383Sbrandon.potter@amd.com        // In general, we should zero the mapped area for anonymous mappings,
185011383Sbrandon.potter@amd.com        // with something like:
185111383Sbrandon.potter@amd.com        //     tp.memsetBlob(start, 0, length);
185211383Sbrandon.potter@amd.com        // However, given that we don't support sparse mappings, and
185311383Sbrandon.potter@amd.com        // some applications can map a couple of gigabytes of space
185411383Sbrandon.potter@amd.com        // (intending sparse usage), that can get painfully expensive.
185511383Sbrandon.potter@amd.com        // Fortunately, since we don't properly implement munmap either,
185611383Sbrandon.potter@amd.com        // there's no danger of remapping used memory, so for now all
185711383Sbrandon.potter@amd.com        // newly mapped memory should already be zeroed so we can skip it.
185811383Sbrandon.potter@amd.com    } else {
185911383Sbrandon.potter@amd.com        // It is possible to mmap an area larger than a file, however
186011383Sbrandon.potter@amd.com        // accessing unmapped portions the system triggers a "Bus error"
186111383Sbrandon.potter@amd.com        // on the host. We must know when to stop copying the file from
186211383Sbrandon.potter@amd.com        // the host into the target address space.
186311383Sbrandon.potter@amd.com        struct stat file_stat;
186411383Sbrandon.potter@amd.com        if (fstat(sim_fd, &file_stat) > 0)
186511383Sbrandon.potter@amd.com            fatal("mmap: cannot stat file");
186611383Sbrandon.potter@amd.com
186711383Sbrandon.potter@amd.com        // Copy the portion of the file that is resident. This requires
186811383Sbrandon.potter@amd.com        // checking both the mmap size and the filesize that we are
186911383Sbrandon.potter@amd.com        // trying to mmap into this space; the mmap size also depends
187011383Sbrandon.potter@amd.com        // on the specified offset into the file.
187111383Sbrandon.potter@amd.com        uint64_t size = std::min((uint64_t)file_stat.st_size - offset,
187211383Sbrandon.potter@amd.com                                 length);
187311383Sbrandon.potter@amd.com        tp.writeBlob(start, pmap, size);
187411383Sbrandon.potter@amd.com
187511383Sbrandon.potter@amd.com        // Cleanup the mmap region before exiting this function.
187611383Sbrandon.potter@amd.com        munmap(pmap, length);
187711383Sbrandon.potter@amd.com
187811392Sbrandon.potter@amd.com        // Maintain the symbol table for dynamic executables.
187911392Sbrandon.potter@amd.com        // The loader will call mmap to map the images into its address
188011392Sbrandon.potter@amd.com        // space and we intercept that here. We can verify that we are
188111392Sbrandon.potter@amd.com        // executing inside the loader by checking the program counter value.
188211392Sbrandon.potter@amd.com        // XXX: with multiprogrammed workloads or multi-node configurations,
188311392Sbrandon.potter@amd.com        // this will not work since there is a single global symbol table.
188411392Sbrandon.potter@amd.com        ObjectFile *interpreter = p->getInterpreter();
188511392Sbrandon.potter@amd.com        if (interpreter) {
188611392Sbrandon.potter@amd.com            Addr text_start = interpreter->textBase();
188711392Sbrandon.potter@amd.com            Addr text_end = text_start + interpreter->textSize();
188811392Sbrandon.potter@amd.com
188911392Sbrandon.potter@amd.com            Addr pc = tc->pcState().pc();
189011392Sbrandon.potter@amd.com
189111392Sbrandon.potter@amd.com            if (pc >= text_start && pc < text_end) {
189211856Sbrandon.potter@amd.com                std::shared_ptr<FDEntry> fdep = (*p->fds)[tgt_fd];
189311856Sbrandon.potter@amd.com                auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(fdep);
189411856Sbrandon.potter@amd.com                ObjectFile *lib = createObjectFile(ffdp->getFileName());
189511392Sbrandon.potter@amd.com
189611392Sbrandon.potter@amd.com                if (lib) {
189711392Sbrandon.potter@amd.com                    lib->loadAllSymbols(debugSymbolTable,
189811392Sbrandon.potter@amd.com                                        lib->textBase(), start);
189911392Sbrandon.potter@amd.com                }
190011392Sbrandon.potter@amd.com            }
190111392Sbrandon.potter@amd.com        }
190211392Sbrandon.potter@amd.com
190311383Sbrandon.potter@amd.com        // Note that we do not zero out the remainder of the mapping. This
190411383Sbrandon.potter@amd.com        // is done by a real system, but it probably will not affect
190511383Sbrandon.potter@amd.com        // execution (hopefully).
190611383Sbrandon.potter@amd.com    }
190711383Sbrandon.potter@amd.com
19081458SN/A    return start;
1909360SN/A}
1910360SN/A
191111593Santhony.gutierrez@amd.comtemplate <class OS>
191211593Santhony.gutierrez@amd.comSyscallReturn
191313995Sbrandon.potter@amd.compwrite64Func(SyscallDesc *desc, int num, ThreadContext *tc)
191411593Santhony.gutierrez@amd.com{
191511593Santhony.gutierrez@amd.com    int index = 0;
191613995Sbrandon.potter@amd.com    auto p = tc->getProcessPtr();
191711593Santhony.gutierrez@amd.com    int tgt_fd = p->getSyscallArg(tc, index);
191811593Santhony.gutierrez@amd.com    Addr bufPtr = p->getSyscallArg(tc, index);
191911593Santhony.gutierrez@amd.com    int nbytes = p->getSyscallArg(tc, index);
192011593Santhony.gutierrez@amd.com    int offset = p->getSyscallArg(tc, index);
192111593Santhony.gutierrez@amd.com
192211856Sbrandon.potter@amd.com    auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]);
192311856Sbrandon.potter@amd.com    if (!ffdp)
192411593Santhony.gutierrez@amd.com        return -EBADF;
192511856Sbrandon.potter@amd.com    int sim_fd = ffdp->getSimFD();
192611593Santhony.gutierrez@amd.com
192711593Santhony.gutierrez@amd.com    BufferArg bufArg(bufPtr, nbytes);
192814024Sgabeblack@google.com    bufArg.copyIn(tc->getVirtProxy());
192911593Santhony.gutierrez@amd.com
193011594Santhony.gutierrez@amd.com    int bytes_written = pwrite(sim_fd, bufArg.bufferPtr(), nbytes, offset);
193111593Santhony.gutierrez@amd.com
193211593Santhony.gutierrez@amd.com    return (bytes_written == -1) ? -errno : bytes_written;
193311593Santhony.gutierrez@amd.com}
193411593Santhony.gutierrez@amd.com
193511385Sbrandon.potter@amd.com/// Target mmap() handler.
193611385Sbrandon.potter@amd.comtemplate <class OS>
193711385Sbrandon.potter@amd.comSyscallReturn
193813995Sbrandon.potter@amd.commmapFunc(SyscallDesc *desc, int num, ThreadContext *tc)
193911385Sbrandon.potter@amd.com{
194013995Sbrandon.potter@amd.com    return mmapImpl<OS>(desc, num, tc, false);
194111385Sbrandon.potter@amd.com}
194211385Sbrandon.potter@amd.com
194311385Sbrandon.potter@amd.com/// Target mmap2() handler.
194411385Sbrandon.potter@amd.comtemplate <class OS>
194511385Sbrandon.potter@amd.comSyscallReturn
194613995Sbrandon.potter@amd.commmap2Func(SyscallDesc *desc, int num, ThreadContext *tc)
194711385Sbrandon.potter@amd.com{
194813995Sbrandon.potter@amd.com    return mmapImpl<OS>(desc, num, tc, true);
194911385Sbrandon.potter@amd.com}
195011385Sbrandon.potter@amd.com
1951378SN/A/// Target getrlimit() handler.
1952360SN/Atemplate <class OS>
19531450SN/ASyscallReturn
195413995Sbrandon.potter@amd.comgetrlimitFunc(SyscallDesc *desc, int callnum, ThreadContext *tc)
1955360SN/A{
19566701Sgblack@eecs.umich.edu    int index = 0;
195713995Sbrandon.potter@amd.com    auto process = tc->getProcessPtr();
19586701Sgblack@eecs.umich.edu    unsigned resource = process->getSyscallArg(tc, index);
19596701Sgblack@eecs.umich.edu    TypedBufferArg<typename OS::rlimit> rlp(process->getSyscallArg(tc, index));
1960360SN/A
1961360SN/A    switch (resource) {
196211906SBrandon.Potter@amd.com      case OS::TGT_RLIMIT_STACK:
196311906SBrandon.Potter@amd.com        // max stack size in bytes: make up a number (8MB for now)
196411906SBrandon.Potter@amd.com        rlp->rlim_cur = rlp->rlim_max = 8 * 1024 * 1024;
196511906SBrandon.Potter@amd.com        rlp->rlim_cur = TheISA::htog(rlp->rlim_cur);
196611906SBrandon.Potter@amd.com        rlp->rlim_max = TheISA::htog(rlp->rlim_max);
196711906SBrandon.Potter@amd.com        break;
1968360SN/A
196911906SBrandon.Potter@amd.com      case OS::TGT_RLIMIT_DATA:
197011906SBrandon.Potter@amd.com        // max data segment size in bytes: make up a number
197111906SBrandon.Potter@amd.com        rlp->rlim_cur = rlp->rlim_max = 256 * 1024 * 1024;
197211906SBrandon.Potter@amd.com        rlp->rlim_cur = TheISA::htog(rlp->rlim_cur);
197311906SBrandon.Potter@amd.com        rlp->rlim_max = TheISA::htog(rlp->rlim_max);
197411906SBrandon.Potter@amd.com        break;
19755877Shsul@eecs.umich.edu
197614119Sbrandon.potter@amd.com      case OS::TGT_RLIMIT_NPROC:
197714119Sbrandon.potter@amd.com        rlp->rlim_cur = rlp->rlim_max = tc->getSystemPtr()->numContexts();
197814119Sbrandon.potter@amd.com        rlp->rlim_cur = TheISA::htog(rlp->rlim_cur);
197914119Sbrandon.potter@amd.com        rlp->rlim_max = TheISA::htog(rlp->rlim_max);
198014119Sbrandon.potter@amd.com        break;
198114119Sbrandon.potter@amd.com
198211906SBrandon.Potter@amd.com      default:
198311906SBrandon.Potter@amd.com        warn("getrlimit: unimplemented resource %d", resource);
198411906SBrandon.Potter@amd.com        return -EINVAL;
198511906SBrandon.Potter@amd.com        break;
1986360SN/A    }
1987360SN/A
198814024Sgabeblack@google.com    rlp.copyOut(tc->getVirtProxy());
19891458SN/A    return 0;
1990360SN/A}
1991360SN/A
199212235Sar4jc@virginia.edutemplate <class OS>
199312235Sar4jc@virginia.eduSyscallReturn
199413995Sbrandon.potter@amd.comprlimitFunc(SyscallDesc *desc, int callnum, ThreadContext *tc)
199512235Sar4jc@virginia.edu{
199612235Sar4jc@virginia.edu    int index = 0;
199713995Sbrandon.potter@amd.com    auto process = tc->getProcessPtr();
199812235Sar4jc@virginia.edu    if (process->getSyscallArg(tc, index) != 0)
199912235Sar4jc@virginia.edu    {
200012235Sar4jc@virginia.edu        warn("prlimit: ignoring rlimits for nonzero pid");
200112235Sar4jc@virginia.edu        return -EPERM;
200212235Sar4jc@virginia.edu    }
200312235Sar4jc@virginia.edu    int resource = process->getSyscallArg(tc, index);
200412235Sar4jc@virginia.edu    Addr n = process->getSyscallArg(tc, index);
200512235Sar4jc@virginia.edu    if (n != 0)
200612235Sar4jc@virginia.edu        warn("prlimit: ignoring new rlimit");
200712235Sar4jc@virginia.edu    Addr o = process->getSyscallArg(tc, index);
200812235Sar4jc@virginia.edu    if (o != 0)
200912235Sar4jc@virginia.edu    {
201012416Sqtt2@cornell.edu        TypedBufferArg<typename OS::rlimit> rlp(o);
201112235Sar4jc@virginia.edu        switch (resource) {
201212235Sar4jc@virginia.edu          case OS::TGT_RLIMIT_STACK:
201312235Sar4jc@virginia.edu            // max stack size in bytes: make up a number (8MB for now)
201412235Sar4jc@virginia.edu            rlp->rlim_cur = rlp->rlim_max = 8 * 1024 * 1024;
201512235Sar4jc@virginia.edu            rlp->rlim_cur = TheISA::htog(rlp->rlim_cur);
201612235Sar4jc@virginia.edu            rlp->rlim_max = TheISA::htog(rlp->rlim_max);
201712235Sar4jc@virginia.edu            break;
201812235Sar4jc@virginia.edu          case OS::TGT_RLIMIT_DATA:
201912235Sar4jc@virginia.edu            // max data segment size in bytes: make up a number
202012235Sar4jc@virginia.edu            rlp->rlim_cur = rlp->rlim_max = 256*1024*1024;
202112235Sar4jc@virginia.edu            rlp->rlim_cur = TheISA::htog(rlp->rlim_cur);
202212235Sar4jc@virginia.edu            rlp->rlim_max = TheISA::htog(rlp->rlim_max);
202312593Sjason@lowepower.com            break;
202412235Sar4jc@virginia.edu          default:
202512235Sar4jc@virginia.edu            warn("prlimit: unimplemented resource %d", resource);
202612235Sar4jc@virginia.edu            return -EINVAL;
202712235Sar4jc@virginia.edu            break;
202812235Sar4jc@virginia.edu        }
202914024Sgabeblack@google.com        rlp.copyOut(tc->getVirtProxy());
203012235Sar4jc@virginia.edu    }
203112235Sar4jc@virginia.edu    return 0;
203212235Sar4jc@virginia.edu}
203312235Sar4jc@virginia.edu
203410796Sbrandon.potter@amd.com/// Target clock_gettime() function.
203510796Sbrandon.potter@amd.comtemplate <class OS>
203610796Sbrandon.potter@amd.comSyscallReturn
203713995Sbrandon.potter@amd.comclock_gettimeFunc(SyscallDesc *desc, int num, ThreadContext *tc)
203810796Sbrandon.potter@amd.com{
203910796Sbrandon.potter@amd.com    int index = 1;
204013995Sbrandon.potter@amd.com    auto p = tc->getProcessPtr();
204110796Sbrandon.potter@amd.com    //int clk_id = p->getSyscallArg(tc, index);
204210796Sbrandon.potter@amd.com    TypedBufferArg<typename OS::timespec> tp(p->getSyscallArg(tc, index));
204310796Sbrandon.potter@amd.com
204410796Sbrandon.potter@amd.com    getElapsedTimeNano(tp->tv_sec, tp->tv_nsec);
204510796Sbrandon.potter@amd.com    tp->tv_sec += seconds_since_epoch;
204610796Sbrandon.potter@amd.com    tp->tv_sec = TheISA::htog(tp->tv_sec);
204710796Sbrandon.potter@amd.com    tp->tv_nsec = TheISA::htog(tp->tv_nsec);
204810796Sbrandon.potter@amd.com
204914024Sgabeblack@google.com    tp.copyOut(tc->getVirtProxy());
205010796Sbrandon.potter@amd.com
205110796Sbrandon.potter@amd.com    return 0;
205210796Sbrandon.potter@amd.com}
205310796Sbrandon.potter@amd.com
205411337SMichael.Lebeane@amd.com/// Target clock_getres() function.
205511337SMichael.Lebeane@amd.comtemplate <class OS>
205611337SMichael.Lebeane@amd.comSyscallReturn
205713995Sbrandon.potter@amd.comclock_getresFunc(SyscallDesc *desc, int num, ThreadContext *tc)
205811337SMichael.Lebeane@amd.com{
205911337SMichael.Lebeane@amd.com    int index = 1;
206013995Sbrandon.potter@amd.com    auto p = tc->getProcessPtr();
206111337SMichael.Lebeane@amd.com    TypedBufferArg<typename OS::timespec> tp(p->getSyscallArg(tc, index));
206211337SMichael.Lebeane@amd.com
206311337SMichael.Lebeane@amd.com    // Set resolution at ns, which is what clock_gettime() returns
206411337SMichael.Lebeane@amd.com    tp->tv_sec = 0;
206511337SMichael.Lebeane@amd.com    tp->tv_nsec = 1;
206611337SMichael.Lebeane@amd.com
206714024Sgabeblack@google.com    tp.copyOut(tc->getVirtProxy());
206811337SMichael.Lebeane@amd.com
206911337SMichael.Lebeane@amd.com    return 0;
207011337SMichael.Lebeane@amd.com}
207111337SMichael.Lebeane@amd.com
2072378SN/A/// Target gettimeofday() handler.
2073360SN/Atemplate <class OS>
20741450SN/ASyscallReturn
207513995Sbrandon.potter@amd.comgettimeofdayFunc(SyscallDesc *desc, int callnum, ThreadContext *tc)
2076360SN/A{
20776701Sgblack@eecs.umich.edu    int index = 0;
207813995Sbrandon.potter@amd.com    auto process = tc->getProcessPtr();
20796701Sgblack@eecs.umich.edu    TypedBufferArg<typename OS::timeval> tp(process->getSyscallArg(tc, index));
2080360SN/A
208110796Sbrandon.potter@amd.com    getElapsedTimeMicro(tp->tv_sec, tp->tv_usec);
2082360SN/A    tp->tv_sec += seconds_since_epoch;
20836109Ssanchezd@stanford.edu    tp->tv_sec = TheISA::htog(tp->tv_sec);
20846109Ssanchezd@stanford.edu    tp->tv_usec = TheISA::htog(tp->tv_usec);
2085360SN/A
208614024Sgabeblack@google.com    tp.copyOut(tc->getVirtProxy());
2087360SN/A
20881458SN/A    return 0;
2089360SN/A}
2090360SN/A
2091360SN/A
20921999SN/A/// Target utimes() handler.
20931999SN/Atemplate <class OS>
20941999SN/ASyscallReturn
209513995Sbrandon.potter@amd.comutimesFunc(SyscallDesc *desc, int callnum, ThreadContext *tc)
20961999SN/A{
20971999SN/A    std::string path;
209813995Sbrandon.potter@amd.com    auto process = tc->getProcessPtr();
20991999SN/A
21006701Sgblack@eecs.umich.edu    int index = 0;
210114024Sgabeblack@google.com    if (!tc->getVirtProxy().tryReadString(path,
21026701Sgblack@eecs.umich.edu                process->getSyscallArg(tc, index))) {
21036701Sgblack@eecs.umich.edu        return -EFAULT;
21046701Sgblack@eecs.umich.edu    }
21051999SN/A
21066701Sgblack@eecs.umich.edu    TypedBufferArg<typename OS::timeval [2]>
21076701Sgblack@eecs.umich.edu        tp(process->getSyscallArg(tc, index));
210814024Sgabeblack@google.com    tp.copyIn(tc->getVirtProxy());
21091999SN/A
21101999SN/A    struct timeval hostTimeval[2];
211111906SBrandon.Potter@amd.com    for (int i = 0; i < 2; ++i) {
21128737Skoansin.tan@gmail.com        hostTimeval[i].tv_sec = TheISA::gtoh((*tp)[i].tv_sec);
21138737Skoansin.tan@gmail.com        hostTimeval[i].tv_usec = TheISA::gtoh((*tp)[i].tv_usec);
21141999SN/A    }
21153669Sbinkertn@umich.edu
211613883Sdavid.hashe@amd.com    // Adjust path for cwd and redirection
211713883Sdavid.hashe@amd.com    path = process->checkPathRedirect(path);
21183669Sbinkertn@umich.edu
21191999SN/A    int result = utimes(path.c_str(), hostTimeval);
21201999SN/A
21211999SN/A    if (result < 0)
21221999SN/A        return -errno;
21231999SN/A
21241999SN/A    return 0;
21251999SN/A}
212611886Sbrandon.potter@amd.com
212711886Sbrandon.potter@amd.comtemplate <class OS>
212811886Sbrandon.potter@amd.comSyscallReturn
212913995Sbrandon.potter@amd.comexecveFunc(SyscallDesc *desc, int callnum, ThreadContext *tc)
213011886Sbrandon.potter@amd.com{
213111886Sbrandon.potter@amd.com    desc->setFlags(0);
213213995Sbrandon.potter@amd.com    auto p = tc->getProcessPtr();
213311886Sbrandon.potter@amd.com
213411886Sbrandon.potter@amd.com    int index = 0;
213511886Sbrandon.potter@amd.com    std::string path;
213614024Sgabeblack@google.com    PortProxy & mem_proxy = tc->getVirtProxy();
213711886Sbrandon.potter@amd.com    if (!mem_proxy.tryReadString(path, p->getSyscallArg(tc, index)))
213811886Sbrandon.potter@amd.com        return -EFAULT;
213911886Sbrandon.potter@amd.com
214011886Sbrandon.potter@amd.com    if (access(path.c_str(), F_OK) == -1)
214111886Sbrandon.potter@amd.com        return -EACCES;
214211886Sbrandon.potter@amd.com
214314020Sgabeblack@google.com    auto read_in = [](std::vector<std::string> &vect,
214414020Sgabeblack@google.com                      PortProxy &mem_proxy, Addr mem_loc)
214511886Sbrandon.potter@amd.com    {
214611886Sbrandon.potter@amd.com        for (int inc = 0; ; inc++) {
214711886Sbrandon.potter@amd.com            BufferArg b((mem_loc + sizeof(Addr) * inc), sizeof(Addr));
214811886Sbrandon.potter@amd.com            b.copyIn(mem_proxy);
214911886Sbrandon.potter@amd.com
215011886Sbrandon.potter@amd.com            if (!*(Addr*)b.bufferPtr())
215111886Sbrandon.potter@amd.com                break;
215211886Sbrandon.potter@amd.com
215311886Sbrandon.potter@amd.com            vect.push_back(std::string());
215411886Sbrandon.potter@amd.com            mem_proxy.tryReadString(vect[inc], *(Addr*)b.bufferPtr());
215511886Sbrandon.potter@amd.com        }
215611886Sbrandon.potter@amd.com    };
215711886Sbrandon.potter@amd.com
215811886Sbrandon.potter@amd.com    /**
215911886Sbrandon.potter@amd.com     * Note that ProcessParams is generated by swig and there are no other
216011886Sbrandon.potter@amd.com     * examples of how to create anything but this default constructor. The
216111886Sbrandon.potter@amd.com     * fields are manually initialized instead of passing parameters to the
216211886Sbrandon.potter@amd.com     * constructor.
216311886Sbrandon.potter@amd.com     */
216411886Sbrandon.potter@amd.com    ProcessParams *pp = new ProcessParams();
216511886Sbrandon.potter@amd.com    pp->executable = path;
216611886Sbrandon.potter@amd.com    Addr argv_mem_loc = p->getSyscallArg(tc, index);
216711886Sbrandon.potter@amd.com    read_in(pp->cmd, mem_proxy, argv_mem_loc);
216811886Sbrandon.potter@amd.com    Addr envp_mem_loc = p->getSyscallArg(tc, index);
216911886Sbrandon.potter@amd.com    read_in(pp->env, mem_proxy, envp_mem_loc);
217011886Sbrandon.potter@amd.com    pp->uid = p->uid();
217111886Sbrandon.potter@amd.com    pp->egid = p->egid();
217211886Sbrandon.potter@amd.com    pp->euid = p->euid();
217311886Sbrandon.potter@amd.com    pp->gid = p->gid();
217411886Sbrandon.potter@amd.com    pp->ppid = p->ppid();
217511886Sbrandon.potter@amd.com    pp->pid = p->pid();
217611886Sbrandon.potter@amd.com    pp->input.assign("cin");
217711886Sbrandon.potter@amd.com    pp->output.assign("cout");
217811886Sbrandon.potter@amd.com    pp->errout.assign("cerr");
217913883Sdavid.hashe@amd.com    pp->cwd.assign(p->tgtCwd);
218011886Sbrandon.potter@amd.com    pp->system = p->system;
218111886Sbrandon.potter@amd.com    /**
218211886Sbrandon.potter@amd.com     * Prevent process object creation with identical PIDs (which will trip
218311886Sbrandon.potter@amd.com     * a fatal check in Process constructor). The execve call is supposed to
218411886Sbrandon.potter@amd.com     * take over the currently executing process' identity but replace
218511886Sbrandon.potter@amd.com     * whatever it is doing with a new process image. Instead of hijacking
218611886Sbrandon.potter@amd.com     * the process object in the simulator, we create a new process object
218711886Sbrandon.potter@amd.com     * and bind to the previous process' thread below (hijacking the thread).
218811886Sbrandon.potter@amd.com     */
218911886Sbrandon.potter@amd.com    p->system->PIDs.erase(p->pid());
219011886Sbrandon.potter@amd.com    Process *new_p = pp->create();
219111886Sbrandon.potter@amd.com    delete pp;
219211886Sbrandon.potter@amd.com
219311886Sbrandon.potter@amd.com    /**
219411886Sbrandon.potter@amd.com     * Work through the file descriptor array and close any files marked
219511886Sbrandon.potter@amd.com     * close-on-exec.
219611886Sbrandon.potter@amd.com     */
219711886Sbrandon.potter@amd.com    new_p->fds = p->fds;
219811886Sbrandon.potter@amd.com    for (int i = 0; i < new_p->fds->getSize(); i++) {
219911886Sbrandon.potter@amd.com        std::shared_ptr<FDEntry> fdep = (*new_p->fds)[i];
220011886Sbrandon.potter@amd.com        if (fdep && fdep->getCOE())
220111886Sbrandon.potter@amd.com            new_p->fds->closeFDEntry(i);
220211886Sbrandon.potter@amd.com    }
220311886Sbrandon.potter@amd.com
220411886Sbrandon.potter@amd.com    *new_p->sigchld = true;
220511886Sbrandon.potter@amd.com
220611886Sbrandon.potter@amd.com    delete p;
220711886Sbrandon.potter@amd.com    tc->clearArchRegs();
220811886Sbrandon.potter@amd.com    tc->setProcessPtr(new_p);
220911886Sbrandon.potter@amd.com    new_p->assignThreadContext(tc->contextId());
221011886Sbrandon.potter@amd.com    new_p->initState();
221111886Sbrandon.potter@amd.com    tc->activate();
221211886Sbrandon.potter@amd.com    TheISA::PCState pcState = tc->pcState();
221311886Sbrandon.potter@amd.com    tc->setNPC(pcState.instAddr());
221411886Sbrandon.potter@amd.com
221511886Sbrandon.potter@amd.com    desc->setFlags(SyscallDesc::SuppressReturnValue);
221611886Sbrandon.potter@amd.com    return 0;
221711886Sbrandon.potter@amd.com}
221811886Sbrandon.potter@amd.com
2219378SN/A/// Target getrusage() function.
2220360SN/Atemplate <class OS>
22211450SN/ASyscallReturn
222213995Sbrandon.potter@amd.comgetrusageFunc(SyscallDesc *desc, int callnum, ThreadContext *tc)
2223360SN/A{
22246701Sgblack@eecs.umich.edu    int index = 0;
222513995Sbrandon.potter@amd.com    auto process = tc->getProcessPtr();
22266701Sgblack@eecs.umich.edu    int who = process->getSyscallArg(tc, index); // THREAD, SELF, or CHILDREN
22276701Sgblack@eecs.umich.edu    TypedBufferArg<typename OS::rusage> rup(process->getSyscallArg(tc, index));
2228360SN/A
22293670Sbinkertn@umich.edu    rup->ru_utime.tv_sec = 0;
22303670Sbinkertn@umich.edu    rup->ru_utime.tv_usec = 0;
2231360SN/A    rup->ru_stime.tv_sec = 0;
2232360SN/A    rup->ru_stime.tv_usec = 0;
2233360SN/A    rup->ru_maxrss = 0;
2234360SN/A    rup->ru_ixrss = 0;
2235360SN/A    rup->ru_idrss = 0;
2236360SN/A    rup->ru_isrss = 0;
2237360SN/A    rup->ru_minflt = 0;
2238360SN/A    rup->ru_majflt = 0;
2239360SN/A    rup->ru_nswap = 0;
2240360SN/A    rup->ru_inblock = 0;
2241360SN/A    rup->ru_oublock = 0;
2242360SN/A    rup->ru_msgsnd = 0;
2243360SN/A    rup->ru_msgrcv = 0;
2244360SN/A    rup->ru_nsignals = 0;
2245360SN/A    rup->ru_nvcsw = 0;
2246360SN/A    rup->ru_nivcsw = 0;
2247360SN/A
22483670Sbinkertn@umich.edu    switch (who) {
22493670Sbinkertn@umich.edu      case OS::TGT_RUSAGE_SELF:
225010796Sbrandon.potter@amd.com        getElapsedTimeMicro(rup->ru_utime.tv_sec, rup->ru_utime.tv_usec);
22518737Skoansin.tan@gmail.com        rup->ru_utime.tv_sec = TheISA::htog(rup->ru_utime.tv_sec);
22528737Skoansin.tan@gmail.com        rup->ru_utime.tv_usec = TheISA::htog(rup->ru_utime.tv_usec);
22533670Sbinkertn@umich.edu        break;
22543670Sbinkertn@umich.edu
22553670Sbinkertn@umich.edu      case OS::TGT_RUSAGE_CHILDREN:
22563670Sbinkertn@umich.edu        // do nothing.  We have no child processes, so they take no time.
22573670Sbinkertn@umich.edu        break;
22583670Sbinkertn@umich.edu
22593670Sbinkertn@umich.edu      default:
22603670Sbinkertn@umich.edu        // don't really handle THREAD or CHILDREN, but just warn and
22613670Sbinkertn@umich.edu        // plow ahead
22623670Sbinkertn@umich.edu        warn("getrusage() only supports RUSAGE_SELF.  Parameter %d ignored.",
22633670Sbinkertn@umich.edu             who);
22643670Sbinkertn@umich.edu    }
22653670Sbinkertn@umich.edu
226614024Sgabeblack@google.com    rup.copyOut(tc->getVirtProxy());
2267360SN/A
22681458SN/A    return 0;
2269360SN/A}
2270360SN/A
22716683Stjones1@inf.ed.ac.uk/// Target times() function.
22726683Stjones1@inf.ed.ac.uktemplate <class OS>
22736683Stjones1@inf.ed.ac.ukSyscallReturn
227413995Sbrandon.potter@amd.comtimesFunc(SyscallDesc *desc, int callnum, ThreadContext *tc)
22756683Stjones1@inf.ed.ac.uk{
22766701Sgblack@eecs.umich.edu    int index = 0;
227713995Sbrandon.potter@amd.com    auto process = tc->getProcessPtr();
22786701Sgblack@eecs.umich.edu    TypedBufferArg<typename OS::tms> bufp(process->getSyscallArg(tc, index));
22796683Stjones1@inf.ed.ac.uk
22806683Stjones1@inf.ed.ac.uk    // Fill in the time structure (in clocks)
22817823Ssteve.reinhardt@amd.com    int64_t clocks = curTick() * OS::M5_SC_CLK_TCK / SimClock::Int::s;
22826683Stjones1@inf.ed.ac.uk    bufp->tms_utime = clocks;
22836683Stjones1@inf.ed.ac.uk    bufp->tms_stime = 0;
22846683Stjones1@inf.ed.ac.uk    bufp->tms_cutime = 0;
22856683Stjones1@inf.ed.ac.uk    bufp->tms_cstime = 0;
22866683Stjones1@inf.ed.ac.uk
22876683Stjones1@inf.ed.ac.uk    // Convert to host endianness
22888737Skoansin.tan@gmail.com    bufp->tms_utime = TheISA::htog(bufp->tms_utime);
22896683Stjones1@inf.ed.ac.uk
22906683Stjones1@inf.ed.ac.uk    // Write back
229114024Sgabeblack@google.com    bufp.copyOut(tc->getVirtProxy());
22926683Stjones1@inf.ed.ac.uk
22936683Stjones1@inf.ed.ac.uk    // Return clock ticks since system boot
22946683Stjones1@inf.ed.ac.uk    return clocks;
22956683Stjones1@inf.ed.ac.uk}
22962553SN/A
22976684Stjones1@inf.ed.ac.uk/// Target time() function.
22986684Stjones1@inf.ed.ac.uktemplate <class OS>
22996684Stjones1@inf.ed.ac.ukSyscallReturn
230013995Sbrandon.potter@amd.comtimeFunc(SyscallDesc *desc, int callnum, ThreadContext *tc)
23016684Stjones1@inf.ed.ac.uk{
23026684Stjones1@inf.ed.ac.uk    typename OS::time_t sec, usec;
230310796Sbrandon.potter@amd.com    getElapsedTimeMicro(sec, usec);
23046684Stjones1@inf.ed.ac.uk    sec += seconds_since_epoch;
23056684Stjones1@inf.ed.ac.uk
23066701Sgblack@eecs.umich.edu    int index = 0;
230713995Sbrandon.potter@amd.com    auto process = tc->getProcessPtr();
23086701Sgblack@eecs.umich.edu    Addr taddr = (Addr)process->getSyscallArg(tc, index);
230911321Ssteve.reinhardt@amd.com    if (taddr != 0) {
23106684Stjones1@inf.ed.ac.uk        typename OS::time_t t = sec;
23118737Skoansin.tan@gmail.com        t = TheISA::htog(t);
231214024Sgabeblack@google.com        PortProxy &p = tc->getVirtProxy();
231314010Sgabeblack@google.com        p.writeBlob(taddr, &t, (int)sizeof(typename OS::time_t));
23146684Stjones1@inf.ed.ac.uk    }
23156684Stjones1@inf.ed.ac.uk    return sec;
23166684Stjones1@inf.ed.ac.uk}
23172553SN/A
231811910SBrandon.Potter@amd.comtemplate <class OS>
231911910SBrandon.Potter@amd.comSyscallReturn
232013995Sbrandon.potter@amd.comtgkillFunc(SyscallDesc *desc, int num, ThreadContext *tc)
232111910SBrandon.Potter@amd.com{
232211910SBrandon.Potter@amd.com    int index = 0;
232313995Sbrandon.potter@amd.com    auto process = tc->getProcessPtr();
232411910SBrandon.Potter@amd.com    int tgid = process->getSyscallArg(tc, index);
232511910SBrandon.Potter@amd.com    int tid = process->getSyscallArg(tc, index);
232611910SBrandon.Potter@amd.com    int sig = process->getSyscallArg(tc, index);
232711910SBrandon.Potter@amd.com
232811910SBrandon.Potter@amd.com    /**
232911910SBrandon.Potter@amd.com     * This system call is intended to allow killing a specific thread
233011910SBrandon.Potter@amd.com     * within an arbitrary thread group if sanctioned with permission checks.
233111910SBrandon.Potter@amd.com     * It's usually true that threads share the termination signal as pointed
233211910SBrandon.Potter@amd.com     * out by the pthread_kill man page and this seems to be the intended
233311910SBrandon.Potter@amd.com     * usage. Due to this being an emulated environment, assume the following:
233411910SBrandon.Potter@amd.com     * Threads are allowed to call tgkill because the EUID for all threads
233511910SBrandon.Potter@amd.com     * should be the same. There is no signal handling mechanism for kernel
233611910SBrandon.Potter@amd.com     * registration of signal handlers since signals are poorly supported in
233711910SBrandon.Potter@amd.com     * emulation mode. Since signal handlers cannot be registered, all
233811910SBrandon.Potter@amd.com     * threads within in a thread group must share the termination signal.
233911910SBrandon.Potter@amd.com     * We never exhaust PIDs so there's no chance of finding the wrong one
234011910SBrandon.Potter@amd.com     * due to PID rollover.
234111910SBrandon.Potter@amd.com     */
234211910SBrandon.Potter@amd.com
234311910SBrandon.Potter@amd.com    System *sys = tc->getSystemPtr();
234411910SBrandon.Potter@amd.com    Process *tgt_proc = nullptr;
234511910SBrandon.Potter@amd.com    for (int i = 0; i < sys->numContexts(); i++) {
234611910SBrandon.Potter@amd.com        Process *temp = sys->threadContexts[i]->getProcessPtr();
234711910SBrandon.Potter@amd.com        if (temp->pid() == tid) {
234811910SBrandon.Potter@amd.com            tgt_proc = temp;
234911910SBrandon.Potter@amd.com            break;
235011910SBrandon.Potter@amd.com        }
235111910SBrandon.Potter@amd.com    }
235211910SBrandon.Potter@amd.com
235311910SBrandon.Potter@amd.com    if (sig != 0 || sig != OS::TGT_SIGABRT)
235411910SBrandon.Potter@amd.com        return -EINVAL;
235511910SBrandon.Potter@amd.com
235611910SBrandon.Potter@amd.com    if (tgt_proc == nullptr)
235711910SBrandon.Potter@amd.com        return -ESRCH;
235811910SBrandon.Potter@amd.com
235911910SBrandon.Potter@amd.com    if (tgid != -1 && tgt_proc->tgid() != tgid)
236011910SBrandon.Potter@amd.com        return -ESRCH;
236111910SBrandon.Potter@amd.com
236211910SBrandon.Potter@amd.com    if (sig == OS::TGT_SIGABRT)
236313995Sbrandon.potter@amd.com        exitGroupFunc(desc, 252, tc);
236411910SBrandon.Potter@amd.com
236511910SBrandon.Potter@amd.com    return 0;
236611910SBrandon.Potter@amd.com}
236711910SBrandon.Potter@amd.com
236813568Sbrandon.potter@amd.comtemplate <class OS>
236913568Sbrandon.potter@amd.comSyscallReturn
237013995Sbrandon.potter@amd.comsocketFunc(SyscallDesc *desc, int num, ThreadContext *tc)
237113568Sbrandon.potter@amd.com{
237213568Sbrandon.potter@amd.com    int index = 0;
237313995Sbrandon.potter@amd.com    auto p = tc->getProcessPtr();
237413568Sbrandon.potter@amd.com    int domain = p->getSyscallArg(tc, index);
237513568Sbrandon.potter@amd.com    int type = p->getSyscallArg(tc, index);
237613568Sbrandon.potter@amd.com    int prot = p->getSyscallArg(tc, index);
237713568Sbrandon.potter@amd.com
237813568Sbrandon.potter@amd.com    int sim_fd = socket(domain, type, prot);
237913568Sbrandon.potter@amd.com    if (sim_fd == -1)
238013568Sbrandon.potter@amd.com        return -errno;
238113568Sbrandon.potter@amd.com
238213568Sbrandon.potter@amd.com    auto sfdp = std::make_shared<SocketFDEntry>(sim_fd, domain, type, prot);
238313568Sbrandon.potter@amd.com    int tgt_fd = p->fds->allocFD(sfdp);
238413568Sbrandon.potter@amd.com
238513568Sbrandon.potter@amd.com    return tgt_fd;
238613568Sbrandon.potter@amd.com}
238713568Sbrandon.potter@amd.com
238813568Sbrandon.potter@amd.comtemplate <class OS>
238913568Sbrandon.potter@amd.comSyscallReturn
239013995Sbrandon.potter@amd.comsocketpairFunc(SyscallDesc *desc, int num, ThreadContext *tc)
239113568Sbrandon.potter@amd.com{
239213568Sbrandon.potter@amd.com    int index = 0;
239313995Sbrandon.potter@amd.com    auto p = tc->getProcessPtr();
239413568Sbrandon.potter@amd.com    int domain = p->getSyscallArg(tc, index);
239513568Sbrandon.potter@amd.com    int type = p->getSyscallArg(tc, index);
239613568Sbrandon.potter@amd.com    int prot = p->getSyscallArg(tc, index);
239713568Sbrandon.potter@amd.com    Addr svPtr = p->getSyscallArg(tc, index);
239813568Sbrandon.potter@amd.com
239913568Sbrandon.potter@amd.com    BufferArg svBuf((Addr)svPtr, 2 * sizeof(int));
240013568Sbrandon.potter@amd.com    int status = socketpair(domain, type, prot, (int *)svBuf.bufferPtr());
240113568Sbrandon.potter@amd.com    if (status == -1)
240213568Sbrandon.potter@amd.com        return -errno;
240313568Sbrandon.potter@amd.com
240413568Sbrandon.potter@amd.com    int *fds = (int *)svBuf.bufferPtr();
240513568Sbrandon.potter@amd.com
240613568Sbrandon.potter@amd.com    auto sfdp1 = std::make_shared<SocketFDEntry>(fds[0], domain, type, prot);
240713568Sbrandon.potter@amd.com    fds[0] = p->fds->allocFD(sfdp1);
240813568Sbrandon.potter@amd.com    auto sfdp2 = std::make_shared<SocketFDEntry>(fds[1], domain, type, prot);
240913568Sbrandon.potter@amd.com    fds[1] = p->fds->allocFD(sfdp2);
241014024Sgabeblack@google.com    svBuf.copyOut(tc->getVirtProxy());
241113568Sbrandon.potter@amd.com
241213568Sbrandon.potter@amd.com    return status;
241313568Sbrandon.potter@amd.com}
24142553SN/A
241513570Sbrandon.potter@amd.comtemplate <class OS>
241613570Sbrandon.potter@amd.comSyscallReturn
241713995Sbrandon.potter@amd.comselectFunc(SyscallDesc *desc, int callnum, ThreadContext *tc)
241813570Sbrandon.potter@amd.com{
241913570Sbrandon.potter@amd.com    int retval;
242013570Sbrandon.potter@amd.com
242113570Sbrandon.potter@amd.com    int index = 0;
242213995Sbrandon.potter@amd.com    auto p = tc->getProcessPtr();
242313570Sbrandon.potter@amd.com    int nfds_t = p->getSyscallArg(tc, index);
242413570Sbrandon.potter@amd.com    Addr fds_read_ptr = p->getSyscallArg(tc, index);
242513570Sbrandon.potter@amd.com    Addr fds_writ_ptr = p->getSyscallArg(tc, index);
242613570Sbrandon.potter@amd.com    Addr fds_excp_ptr = p->getSyscallArg(tc, index);
242713570Sbrandon.potter@amd.com    Addr time_val_ptr = p->getSyscallArg(tc, index);
242813570Sbrandon.potter@amd.com
242913570Sbrandon.potter@amd.com    TypedBufferArg<typename OS::fd_set> rd_t(fds_read_ptr);
243013570Sbrandon.potter@amd.com    TypedBufferArg<typename OS::fd_set> wr_t(fds_writ_ptr);
243113570Sbrandon.potter@amd.com    TypedBufferArg<typename OS::fd_set> ex_t(fds_excp_ptr);
243213570Sbrandon.potter@amd.com    TypedBufferArg<typename OS::timeval> tp(time_val_ptr);
243313570Sbrandon.potter@amd.com
243413570Sbrandon.potter@amd.com    /**
243513570Sbrandon.potter@amd.com     * Host fields. Notice that these use the definitions from the system
243613570Sbrandon.potter@amd.com     * headers instead of the gem5 headers and libraries. If the host and
243713570Sbrandon.potter@amd.com     * target have different header file definitions, this will not work.
243813570Sbrandon.potter@amd.com     */
243913570Sbrandon.potter@amd.com    fd_set rd_h;
244013570Sbrandon.potter@amd.com    FD_ZERO(&rd_h);
244113570Sbrandon.potter@amd.com    fd_set wr_h;
244213570Sbrandon.potter@amd.com    FD_ZERO(&wr_h);
244313570Sbrandon.potter@amd.com    fd_set ex_h;
244413570Sbrandon.potter@amd.com    FD_ZERO(&ex_h);
244513570Sbrandon.potter@amd.com
244613570Sbrandon.potter@amd.com    /**
244713570Sbrandon.potter@amd.com     * Copy in the fd_set from the target.
244813570Sbrandon.potter@amd.com     */
244913570Sbrandon.potter@amd.com    if (fds_read_ptr)
245014024Sgabeblack@google.com        rd_t.copyIn(tc->getVirtProxy());
245113570Sbrandon.potter@amd.com    if (fds_writ_ptr)
245214024Sgabeblack@google.com        wr_t.copyIn(tc->getVirtProxy());
245313570Sbrandon.potter@amd.com    if (fds_excp_ptr)
245414024Sgabeblack@google.com        ex_t.copyIn(tc->getVirtProxy());
245513570Sbrandon.potter@amd.com
245613570Sbrandon.potter@amd.com    /**
245713570Sbrandon.potter@amd.com     * We need to translate the target file descriptor set into a host file
245813570Sbrandon.potter@amd.com     * descriptor set. This involves both our internal process fd array
245913570Sbrandon.potter@amd.com     * and the fd_set defined in Linux header files. The nfds field also
246013570Sbrandon.potter@amd.com     * needs to be updated as it will be only target specific after
246113570Sbrandon.potter@amd.com     * retrieving it from the target; the nfds value is expected to be the
246213570Sbrandon.potter@amd.com     * highest file descriptor that needs to be checked, so we need to extend
246313570Sbrandon.potter@amd.com     * it out for nfds_h when we do the update.
246413570Sbrandon.potter@amd.com     */
246513570Sbrandon.potter@amd.com    int nfds_h = 0;
246613570Sbrandon.potter@amd.com    std::map<int, int> trans_map;
246713570Sbrandon.potter@amd.com    auto try_add_host_set = [&](fd_set *tgt_set_entry,
246813570Sbrandon.potter@amd.com                                fd_set *hst_set_entry,
246913570Sbrandon.potter@amd.com                                int iter) -> bool
247013570Sbrandon.potter@amd.com    {
247113570Sbrandon.potter@amd.com        /**
247213570Sbrandon.potter@amd.com         * By this point, we know that we are looking at a valid file
247313570Sbrandon.potter@amd.com         * descriptor set on the target. We need to check if the target file
247413570Sbrandon.potter@amd.com         * descriptor value passed in as iter is part of the set.
247513570Sbrandon.potter@amd.com         */
247613570Sbrandon.potter@amd.com        if (FD_ISSET(iter, tgt_set_entry)) {
247713570Sbrandon.potter@amd.com            /**
247813570Sbrandon.potter@amd.com             * We know that the target file descriptor belongs to the set,
247913570Sbrandon.potter@amd.com             * but we do not yet know if the file descriptor is valid or
248013570Sbrandon.potter@amd.com             * that we have a host mapping. Check that now.
248113570Sbrandon.potter@amd.com             */
248213570Sbrandon.potter@amd.com            auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[iter]);
248313570Sbrandon.potter@amd.com            if (!hbfdp)
248413570Sbrandon.potter@amd.com                return true;
248513570Sbrandon.potter@amd.com            auto sim_fd = hbfdp->getSimFD();
248613570Sbrandon.potter@amd.com
248713570Sbrandon.potter@amd.com            /**
248813570Sbrandon.potter@amd.com             * Add the sim_fd to tgt_fd translation into trans_map for use
248913570Sbrandon.potter@amd.com             * later when we need to zero the target fd_set structures and
249013570Sbrandon.potter@amd.com             * then update them with hits returned from the host select call.
249113570Sbrandon.potter@amd.com             */
249213570Sbrandon.potter@amd.com            trans_map[sim_fd] = iter;
249313570Sbrandon.potter@amd.com
249413570Sbrandon.potter@amd.com            /**
249513570Sbrandon.potter@amd.com             * We know that the host file descriptor exists so now we check
249613570Sbrandon.potter@amd.com             * if we need to update the max count for nfds_h before passing
249713570Sbrandon.potter@amd.com             * the duplicated structure into the host.
249813570Sbrandon.potter@amd.com             */
249913570Sbrandon.potter@amd.com            nfds_h = std::max(nfds_h - 1, sim_fd + 1);
250013570Sbrandon.potter@amd.com
250113570Sbrandon.potter@amd.com            /**
250213570Sbrandon.potter@amd.com             * Add the host file descriptor to the set that we are going to
250313570Sbrandon.potter@amd.com             * pass into the host.
250413570Sbrandon.potter@amd.com             */
250513570Sbrandon.potter@amd.com            FD_SET(sim_fd, hst_set_entry);
250613570Sbrandon.potter@amd.com        }
250713570Sbrandon.potter@amd.com        return false;
250813570Sbrandon.potter@amd.com    };
250913570Sbrandon.potter@amd.com
251013570Sbrandon.potter@amd.com    for (int i = 0; i < nfds_t; i++) {
251113570Sbrandon.potter@amd.com        if (fds_read_ptr) {
251213570Sbrandon.potter@amd.com            bool ebadf = try_add_host_set((fd_set*)&*rd_t, &rd_h, i);
251313570Sbrandon.potter@amd.com            if (ebadf) return -EBADF;
251413570Sbrandon.potter@amd.com        }
251513570Sbrandon.potter@amd.com        if (fds_writ_ptr) {
251613570Sbrandon.potter@amd.com            bool ebadf = try_add_host_set((fd_set*)&*wr_t, &wr_h, i);
251713570Sbrandon.potter@amd.com            if (ebadf) return -EBADF;
251813570Sbrandon.potter@amd.com        }
251913570Sbrandon.potter@amd.com        if (fds_excp_ptr) {
252013570Sbrandon.potter@amd.com            bool ebadf = try_add_host_set((fd_set*)&*ex_t, &ex_h, i);
252113570Sbrandon.potter@amd.com            if (ebadf) return -EBADF;
252213570Sbrandon.potter@amd.com        }
252313570Sbrandon.potter@amd.com    }
252413570Sbrandon.potter@amd.com
252513570Sbrandon.potter@amd.com    if (time_val_ptr) {
252613570Sbrandon.potter@amd.com        /**
252713570Sbrandon.potter@amd.com         * It might be possible to decrement the timeval based on some
252813570Sbrandon.potter@amd.com         * derivation of wall clock determined from elapsed simulator ticks
252913570Sbrandon.potter@amd.com         * but that seems like overkill. Rather, we just set the timeval with
253013570Sbrandon.potter@amd.com         * zero timeout. (There is no reason to block during the simulation
253113570Sbrandon.potter@amd.com         * as it only decreases simulator performance.)
253213570Sbrandon.potter@amd.com         */
253313570Sbrandon.potter@amd.com        tp->tv_sec = 0;
253413570Sbrandon.potter@amd.com        tp->tv_usec = 0;
253513570Sbrandon.potter@amd.com
253613570Sbrandon.potter@amd.com        retval = select(nfds_h,
253713570Sbrandon.potter@amd.com                        fds_read_ptr ? &rd_h : nullptr,
253813570Sbrandon.potter@amd.com                        fds_writ_ptr ? &wr_h : nullptr,
253913570Sbrandon.potter@amd.com                        fds_excp_ptr ? &ex_h : nullptr,
254013570Sbrandon.potter@amd.com                        (timeval*)&*tp);
254113570Sbrandon.potter@amd.com    } else {
254213570Sbrandon.potter@amd.com        /**
254313570Sbrandon.potter@amd.com         * If the timeval pointer is null, setup a new timeval structure to
254413570Sbrandon.potter@amd.com         * pass into the host select call. Unfortunately, we will need to
254513570Sbrandon.potter@amd.com         * manually check the return value and throw a retry fault if the
254613570Sbrandon.potter@amd.com         * return value is zero. Allowing the system call to block will
254713570Sbrandon.potter@amd.com         * likely deadlock the event queue.
254813570Sbrandon.potter@amd.com         */
254913570Sbrandon.potter@amd.com        struct timeval tv = { 0, 0 };
255013570Sbrandon.potter@amd.com
255113570Sbrandon.potter@amd.com        retval = select(nfds_h,
255213570Sbrandon.potter@amd.com                        fds_read_ptr ? &rd_h : nullptr,
255313570Sbrandon.potter@amd.com                        fds_writ_ptr ? &wr_h : nullptr,
255413570Sbrandon.potter@amd.com                        fds_excp_ptr ? &ex_h : nullptr,
255513570Sbrandon.potter@amd.com                        &tv);
255613570Sbrandon.potter@amd.com
255713570Sbrandon.potter@amd.com        if (retval == 0) {
255813570Sbrandon.potter@amd.com            /**
255913570Sbrandon.potter@amd.com             * If blocking indefinitely, check the signal list to see if a
256013570Sbrandon.potter@amd.com             * signal would break the poll out of the retry cycle and try to
256113570Sbrandon.potter@amd.com             * return the signal interrupt instead.
256213570Sbrandon.potter@amd.com             */
256313570Sbrandon.potter@amd.com            for (auto sig : tc->getSystemPtr()->signalList)
256413570Sbrandon.potter@amd.com                if (sig.receiver == p)
256513570Sbrandon.potter@amd.com                    return -EINTR;
256613570Sbrandon.potter@amd.com            return SyscallReturn::retry();
256713570Sbrandon.potter@amd.com        }
256813570Sbrandon.potter@amd.com    }
256913570Sbrandon.potter@amd.com
257013570Sbrandon.potter@amd.com    if (retval == -1)
257113570Sbrandon.potter@amd.com        return -errno;
257213570Sbrandon.potter@amd.com
257313570Sbrandon.potter@amd.com    FD_ZERO((fd_set*)&*rd_t);
257413570Sbrandon.potter@amd.com    FD_ZERO((fd_set*)&*wr_t);
257513570Sbrandon.potter@amd.com    FD_ZERO((fd_set*)&*ex_t);
257613570Sbrandon.potter@amd.com
257713570Sbrandon.potter@amd.com    /**
257813570Sbrandon.potter@amd.com     * We need to translate the host file descriptor set into a target file
257913570Sbrandon.potter@amd.com     * descriptor set. This involves both our internal process fd array
258013570Sbrandon.potter@amd.com     * and the fd_set defined in header files.
258113570Sbrandon.potter@amd.com     */
258213570Sbrandon.potter@amd.com    for (int i = 0; i < nfds_h; i++) {
258313570Sbrandon.potter@amd.com        if (fds_read_ptr) {
258413570Sbrandon.potter@amd.com            if (FD_ISSET(i, &rd_h))
258513570Sbrandon.potter@amd.com                FD_SET(trans_map[i], (fd_set*)&*rd_t);
258613570Sbrandon.potter@amd.com        }
258713570Sbrandon.potter@amd.com
258813570Sbrandon.potter@amd.com        if (fds_writ_ptr) {
258913570Sbrandon.potter@amd.com            if (FD_ISSET(i, &wr_h))
259013570Sbrandon.potter@amd.com                FD_SET(trans_map[i], (fd_set*)&*wr_t);
259113570Sbrandon.potter@amd.com        }
259213570Sbrandon.potter@amd.com
259313570Sbrandon.potter@amd.com        if (fds_excp_ptr) {
259413570Sbrandon.potter@amd.com            if (FD_ISSET(i, &ex_h))
259513570Sbrandon.potter@amd.com                FD_SET(trans_map[i], (fd_set*)&*ex_t);
259613570Sbrandon.potter@amd.com        }
259713570Sbrandon.potter@amd.com    }
259813570Sbrandon.potter@amd.com
259913570Sbrandon.potter@amd.com    if (fds_read_ptr)
260014024Sgabeblack@google.com        rd_t.copyOut(tc->getVirtProxy());
260113570Sbrandon.potter@amd.com    if (fds_writ_ptr)
260214024Sgabeblack@google.com        wr_t.copyOut(tc->getVirtProxy());
260313570Sbrandon.potter@amd.com    if (fds_excp_ptr)
260414024Sgabeblack@google.com        ex_t.copyOut(tc->getVirtProxy());
260513570Sbrandon.potter@amd.com    if (time_val_ptr)
260614024Sgabeblack@google.com        tp.copyOut(tc->getVirtProxy());
260713570Sbrandon.potter@amd.com
260813570Sbrandon.potter@amd.com    return retval;
260913570Sbrandon.potter@amd.com}
261013570Sbrandon.potter@amd.com
261113570Sbrandon.potter@amd.comtemplate <class OS>
261213570Sbrandon.potter@amd.comSyscallReturn
261313995Sbrandon.potter@amd.comreadFunc(SyscallDesc *desc, int num, ThreadContext *tc)
261413570Sbrandon.potter@amd.com{
261513570Sbrandon.potter@amd.com    int index = 0;
261613995Sbrandon.potter@amd.com    auto p = tc->getProcessPtr();
261713570Sbrandon.potter@amd.com    int tgt_fd = p->getSyscallArg(tc, index);
261813570Sbrandon.potter@amd.com    Addr buf_ptr = p->getSyscallArg(tc, index);
261913570Sbrandon.potter@amd.com    int nbytes = p->getSyscallArg(tc, index);
262013570Sbrandon.potter@amd.com
262113570Sbrandon.potter@amd.com    auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]);
262213570Sbrandon.potter@amd.com    if (!hbfdp)
262313570Sbrandon.potter@amd.com        return -EBADF;
262413570Sbrandon.potter@amd.com    int sim_fd = hbfdp->getSimFD();
262513570Sbrandon.potter@amd.com
262613570Sbrandon.potter@amd.com    struct pollfd pfd;
262713570Sbrandon.potter@amd.com    pfd.fd = sim_fd;
262813570Sbrandon.potter@amd.com    pfd.events = POLLIN | POLLPRI;
262913570Sbrandon.potter@amd.com    if ((poll(&pfd, 1, 0) == 0)
263013570Sbrandon.potter@amd.com        && !(hbfdp->getFlags() & OS::TGT_O_NONBLOCK))
263113570Sbrandon.potter@amd.com        return SyscallReturn::retry();
263213570Sbrandon.potter@amd.com
263313570Sbrandon.potter@amd.com    BufferArg buf_arg(buf_ptr, nbytes);
263413570Sbrandon.potter@amd.com    int bytes_read = read(sim_fd, buf_arg.bufferPtr(), nbytes);
263513570Sbrandon.potter@amd.com
263613570Sbrandon.potter@amd.com    if (bytes_read > 0)
263714024Sgabeblack@google.com        buf_arg.copyOut(tc->getVirtProxy());
263813570Sbrandon.potter@amd.com
263913570Sbrandon.potter@amd.com    return (bytes_read == -1) ? -errno : bytes_read;
264013570Sbrandon.potter@amd.com}
264113570Sbrandon.potter@amd.com
264213570Sbrandon.potter@amd.comtemplate <class OS>
264313570Sbrandon.potter@amd.comSyscallReturn
264413995Sbrandon.potter@amd.comwriteFunc(SyscallDesc *desc, int num, ThreadContext *tc)
264513570Sbrandon.potter@amd.com{
264613570Sbrandon.potter@amd.com    int index = 0;
264713995Sbrandon.potter@amd.com    auto p = tc->getProcessPtr();
264813570Sbrandon.potter@amd.com    int tgt_fd = p->getSyscallArg(tc, index);
264913570Sbrandon.potter@amd.com    Addr buf_ptr = p->getSyscallArg(tc, index);
265013570Sbrandon.potter@amd.com    int nbytes = p->getSyscallArg(tc, index);
265113570Sbrandon.potter@amd.com
265213570Sbrandon.potter@amd.com    auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]);
265313570Sbrandon.potter@amd.com    if (!hbfdp)
265413570Sbrandon.potter@amd.com        return -EBADF;
265513570Sbrandon.potter@amd.com    int sim_fd = hbfdp->getSimFD();
265613570Sbrandon.potter@amd.com
265713570Sbrandon.potter@amd.com    BufferArg buf_arg(buf_ptr, nbytes);
265814024Sgabeblack@google.com    buf_arg.copyIn(tc->getVirtProxy());
265913570Sbrandon.potter@amd.com
266013570Sbrandon.potter@amd.com    struct pollfd pfd;
266113570Sbrandon.potter@amd.com    pfd.fd = sim_fd;
266213570Sbrandon.potter@amd.com    pfd.events = POLLOUT;
266313570Sbrandon.potter@amd.com
266413570Sbrandon.potter@amd.com    /**
266513570Sbrandon.potter@amd.com     * We don't want to poll on /dev/random. The kernel will not enable the
266613570Sbrandon.potter@amd.com     * file descriptor for writing unless the entropy in the system falls
266713570Sbrandon.potter@amd.com     * below write_wakeup_threshold. This is not guaranteed to happen
266813570Sbrandon.potter@amd.com     * depending on host settings.
266913570Sbrandon.potter@amd.com     */
267013570Sbrandon.potter@amd.com    auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(hbfdp);
267113570Sbrandon.potter@amd.com    if (ffdp && (ffdp->getFileName() != "/dev/random")) {
267213570Sbrandon.potter@amd.com        if (!poll(&pfd, 1, 0) && !(ffdp->getFlags() & OS::TGT_O_NONBLOCK))
267313570Sbrandon.potter@amd.com            return SyscallReturn::retry();
267413570Sbrandon.potter@amd.com    }
267513570Sbrandon.potter@amd.com
267613570Sbrandon.potter@amd.com    int bytes_written = write(sim_fd, buf_arg.bufferPtr(), nbytes);
267713570Sbrandon.potter@amd.com
267813570Sbrandon.potter@amd.com    if (bytes_written != -1)
267913570Sbrandon.potter@amd.com        fsync(sim_fd);
268013570Sbrandon.potter@amd.com
268113570Sbrandon.potter@amd.com    return (bytes_written == -1) ? -errno : bytes_written;
268213570Sbrandon.potter@amd.com}
268313570Sbrandon.potter@amd.com
268413570Sbrandon.potter@amd.comtemplate <class OS>
268513570Sbrandon.potter@amd.comSyscallReturn
268613995Sbrandon.potter@amd.comwait4Func(SyscallDesc *desc, int num, ThreadContext *tc)
268713570Sbrandon.potter@amd.com{
268813570Sbrandon.potter@amd.com    int index = 0;
268913995Sbrandon.potter@amd.com    auto p = tc->getProcessPtr();
269013570Sbrandon.potter@amd.com    pid_t pid = p->getSyscallArg(tc, index);
269113570Sbrandon.potter@amd.com    Addr statPtr = p->getSyscallArg(tc, index);
269213570Sbrandon.potter@amd.com    int options = p->getSyscallArg(tc, index);
269313570Sbrandon.potter@amd.com    Addr rusagePtr = p->getSyscallArg(tc, index);
269413570Sbrandon.potter@amd.com
269513570Sbrandon.potter@amd.com    if (rusagePtr)
269613907Salexandru.dutu@amd.com        DPRINTF_SYSCALL(Verbose, "wait4: rusage pointer provided %lx, however "
269713570Sbrandon.potter@amd.com                 "functionality not supported. Ignoring rusage pointer.\n",
269813907Salexandru.dutu@amd.com                 rusagePtr);
269913570Sbrandon.potter@amd.com
270013570Sbrandon.potter@amd.com    /**
270113570Sbrandon.potter@amd.com     * Currently, wait4 is only implemented so that it will wait for children
270213570Sbrandon.potter@amd.com     * exit conditions which are denoted by a SIGCHLD signals posted into the
270313570Sbrandon.potter@amd.com     * system signal list. We return no additional information via any of the
270413570Sbrandon.potter@amd.com     * parameters supplied to wait4. If nothing is found in the system signal
270513570Sbrandon.potter@amd.com     * list, we will wait indefinitely for SIGCHLD to post by retrying the
270613570Sbrandon.potter@amd.com     * call.
270713570Sbrandon.potter@amd.com     */
270813570Sbrandon.potter@amd.com    System *sysh = tc->getSystemPtr();
270913570Sbrandon.potter@amd.com    std::list<BasicSignal>::iterator iter;
271013570Sbrandon.potter@amd.com    for (iter=sysh->signalList.begin(); iter!=sysh->signalList.end(); iter++) {
271113570Sbrandon.potter@amd.com        if (iter->receiver == p) {
271213570Sbrandon.potter@amd.com            if (pid < -1) {
271313570Sbrandon.potter@amd.com                if ((iter->sender->pgid() == -pid)
271413570Sbrandon.potter@amd.com                    && (iter->signalValue == OS::TGT_SIGCHLD))
271513570Sbrandon.potter@amd.com                    goto success;
271613570Sbrandon.potter@amd.com            } else if (pid == -1) {
271713570Sbrandon.potter@amd.com                if (iter->signalValue == OS::TGT_SIGCHLD)
271813570Sbrandon.potter@amd.com                    goto success;
271913570Sbrandon.potter@amd.com            } else if (pid == 0) {
272013570Sbrandon.potter@amd.com                if ((iter->sender->pgid() == p->pgid())
272113570Sbrandon.potter@amd.com                    && (iter->signalValue == OS::TGT_SIGCHLD))
272213570Sbrandon.potter@amd.com                    goto success;
272313570Sbrandon.potter@amd.com            } else {
272413570Sbrandon.potter@amd.com                if ((iter->sender->pid() == pid)
272513570Sbrandon.potter@amd.com                    && (iter->signalValue == OS::TGT_SIGCHLD))
272613570Sbrandon.potter@amd.com                    goto success;
272713570Sbrandon.potter@amd.com            }
272813570Sbrandon.potter@amd.com        }
272913570Sbrandon.potter@amd.com    }
273013570Sbrandon.potter@amd.com
273113570Sbrandon.potter@amd.com    return (options & OS::TGT_WNOHANG) ? 0 : SyscallReturn::retry();
273213570Sbrandon.potter@amd.com
273313570Sbrandon.potter@amd.comsuccess:
273413570Sbrandon.potter@amd.com    // Set status to EXITED for WIFEXITED evaluations.
273513570Sbrandon.potter@amd.com    const int EXITED = 0;
273613570Sbrandon.potter@amd.com    BufferArg statusBuf(statPtr, sizeof(int));
273713570Sbrandon.potter@amd.com    *(int *)statusBuf.bufferPtr() = EXITED;
273814024Sgabeblack@google.com    statusBuf.copyOut(tc->getVirtProxy());
273913570Sbrandon.potter@amd.com
274013570Sbrandon.potter@amd.com    // Return the child PID.
274113570Sbrandon.potter@amd.com    pid_t retval = iter->sender->pid();
274213570Sbrandon.potter@amd.com    sysh->signalList.erase(iter);
274313570Sbrandon.potter@amd.com    return retval;
274413570Sbrandon.potter@amd.com}
274513570Sbrandon.potter@amd.com
274613570Sbrandon.potter@amd.comtemplate <class OS>
274713570Sbrandon.potter@amd.comSyscallReturn
274813995Sbrandon.potter@amd.comacceptFunc(SyscallDesc *desc, int num, ThreadContext *tc)
274913570Sbrandon.potter@amd.com{
275013570Sbrandon.potter@amd.com    struct sockaddr sa;
275113570Sbrandon.potter@amd.com    socklen_t addrLen;
275213570Sbrandon.potter@amd.com    int host_fd;
275313570Sbrandon.potter@amd.com    int index = 0;
275413995Sbrandon.potter@amd.com    auto p = tc->getProcessPtr();
275513570Sbrandon.potter@amd.com    int tgt_fd = p->getSyscallArg(tc, index);
275613570Sbrandon.potter@amd.com    Addr addrPtr = p->getSyscallArg(tc, index);
275713570Sbrandon.potter@amd.com    Addr lenPtr = p->getSyscallArg(tc, index);
275813570Sbrandon.potter@amd.com
275913570Sbrandon.potter@amd.com    BufferArg *lenBufPtr = nullptr;
276013570Sbrandon.potter@amd.com    BufferArg *addrBufPtr = nullptr;
276113570Sbrandon.potter@amd.com
276213570Sbrandon.potter@amd.com    auto sfdp = std::dynamic_pointer_cast<SocketFDEntry>((*p->fds)[tgt_fd]);
276313570Sbrandon.potter@amd.com    if (!sfdp)
276413570Sbrandon.potter@amd.com        return -EBADF;
276513570Sbrandon.potter@amd.com    int sim_fd = sfdp->getSimFD();
276613570Sbrandon.potter@amd.com
276713570Sbrandon.potter@amd.com    /**
276813570Sbrandon.potter@amd.com     * We poll the socket file descriptor first to guarantee that we do not
276913570Sbrandon.potter@amd.com     * block on our accept call. The socket can be opened without the
277013570Sbrandon.potter@amd.com     * non-blocking flag (it blocks). This will cause deadlocks between
277113570Sbrandon.potter@amd.com     * communicating processes.
277213570Sbrandon.potter@amd.com     */
277313570Sbrandon.potter@amd.com    struct pollfd pfd;
277413570Sbrandon.potter@amd.com    pfd.fd = sim_fd;
277513570Sbrandon.potter@amd.com    pfd.events = POLLIN | POLLPRI;
277613570Sbrandon.potter@amd.com    if ((poll(&pfd, 1, 0) == 0)
277713570Sbrandon.potter@amd.com        && !(sfdp->getFlags() & OS::TGT_O_NONBLOCK))
277813570Sbrandon.potter@amd.com        return SyscallReturn::retry();
277913570Sbrandon.potter@amd.com
278013570Sbrandon.potter@amd.com    if (lenPtr) {
278113570Sbrandon.potter@amd.com        lenBufPtr = new BufferArg(lenPtr, sizeof(socklen_t));
278214024Sgabeblack@google.com        lenBufPtr->copyIn(tc->getVirtProxy());
278313570Sbrandon.potter@amd.com        memcpy(&addrLen, (socklen_t *)lenBufPtr->bufferPtr(),
278413570Sbrandon.potter@amd.com               sizeof(socklen_t));
278513570Sbrandon.potter@amd.com    }
278613570Sbrandon.potter@amd.com
278713570Sbrandon.potter@amd.com    if (addrPtr) {
278813570Sbrandon.potter@amd.com        addrBufPtr = new BufferArg(addrPtr, sizeof(struct sockaddr));
278914024Sgabeblack@google.com        addrBufPtr->copyIn(tc->getVirtProxy());
279013570Sbrandon.potter@amd.com        memcpy(&sa, (struct sockaddr *)addrBufPtr->bufferPtr(),
279113570Sbrandon.potter@amd.com               sizeof(struct sockaddr));
279213570Sbrandon.potter@amd.com    }
279313570Sbrandon.potter@amd.com
279413570Sbrandon.potter@amd.com    host_fd = accept(sim_fd, &sa, &addrLen);
279513570Sbrandon.potter@amd.com
279613570Sbrandon.potter@amd.com    if (host_fd == -1)
279713570Sbrandon.potter@amd.com        return -errno;
279813570Sbrandon.potter@amd.com
279913570Sbrandon.potter@amd.com    if (addrPtr) {
280013570Sbrandon.potter@amd.com        memcpy(addrBufPtr->bufferPtr(), &sa, sizeof(sa));
280114024Sgabeblack@google.com        addrBufPtr->copyOut(tc->getVirtProxy());
280213570Sbrandon.potter@amd.com        delete(addrBufPtr);
280313570Sbrandon.potter@amd.com    }
280413570Sbrandon.potter@amd.com
280513570Sbrandon.potter@amd.com    if (lenPtr) {
280613570Sbrandon.potter@amd.com        *(socklen_t *)lenBufPtr->bufferPtr() = addrLen;
280714024Sgabeblack@google.com        lenBufPtr->copyOut(tc->getVirtProxy());
280813570Sbrandon.potter@amd.com        delete(lenBufPtr);
280913570Sbrandon.potter@amd.com    }
281013570Sbrandon.potter@amd.com
281113570Sbrandon.potter@amd.com    auto afdp = std::make_shared<SocketFDEntry>(host_fd, sfdp->_domain,
281213570Sbrandon.potter@amd.com                                                sfdp->_type, sfdp->_protocol);
281313570Sbrandon.potter@amd.com    return p->fds->allocFD(afdp);
281413570Sbrandon.potter@amd.com}
281513570Sbrandon.potter@amd.com
281613933Sbrandon.potter@amd.com/// Target eventfd() function.
281713933Sbrandon.potter@amd.comtemplate <class OS>
281813933Sbrandon.potter@amd.comSyscallReturn
281913995Sbrandon.potter@amd.comeventfdFunc(SyscallDesc *desc, int num, ThreadContext *tc)
282013933Sbrandon.potter@amd.com{
282113936SAndrea.Mondelli@ucf.edu#if defined(__linux__)
282213933Sbrandon.potter@amd.com    int index = 0;
282313995Sbrandon.potter@amd.com    auto p = tc->getProcessPtr();
282413933Sbrandon.potter@amd.com    unsigned initval = p->getSyscallArg(tc, index);
282513933Sbrandon.potter@amd.com    int in_flags = p->getSyscallArg(tc, index);
282613933Sbrandon.potter@amd.com
282713933Sbrandon.potter@amd.com    int sim_fd = eventfd(initval, in_flags);
282813933Sbrandon.potter@amd.com    if (sim_fd == -1)
282913933Sbrandon.potter@amd.com        return -errno;
283013933Sbrandon.potter@amd.com
283113933Sbrandon.potter@amd.com    bool cloexec = in_flags & OS::TGT_O_CLOEXEC;
283213933Sbrandon.potter@amd.com
283313933Sbrandon.potter@amd.com    int flags = cloexec ? OS::TGT_O_CLOEXEC : 0;
283413933Sbrandon.potter@amd.com    flags |= (in_flags & OS::TGT_O_NONBLOCK) ? OS::TGT_O_NONBLOCK : 0;
283513933Sbrandon.potter@amd.com
283613933Sbrandon.potter@amd.com    auto hbfdp = std::make_shared<HBFDEntry>(flags, sim_fd, cloexec);
283713933Sbrandon.potter@amd.com    int tgt_fd = p->fds->allocFD(hbfdp);
283813933Sbrandon.potter@amd.com    return tgt_fd;
283913933Sbrandon.potter@amd.com#else
284013933Sbrandon.potter@amd.com    warnUnsupportedOS("eventfd");
284113933Sbrandon.potter@amd.com    return -1;
284213933Sbrandon.potter@amd.com#endif
284313933Sbrandon.potter@amd.com}
284413933Sbrandon.potter@amd.com
28451354SN/A#endif // __SIM_SYSCALL_EMUL_HH__
2846