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