syscall_emul.hh revision 14130
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 22914130Sbrandon.potter@amd.com/// Target getpgrpFunc() handler. 23014130Sbrandon.potter@amd.comSyscallReturn getpgrpFunc(SyscallDesc *desc, int num, ThreadContext *tc); 23114130Sbrandon.potter@amd.com 23211885Sbrandon.potter@amd.com/// Target setpgid() handler. 23313995Sbrandon.potter@amd.comSyscallReturn setpgidFunc(SyscallDesc *desc, int num, ThreadContext *tc); 2341999SN/A 2351999SN/A/// Target fchown() handler. 23613995Sbrandon.potter@amd.comSyscallReturn fchownFunc(SyscallDesc *desc, int num, ThreadContext *tc); 2371999SN/A 2383079Sstever@eecs.umich.edu/// Target dup() handler. 23913995Sbrandon.potter@amd.comSyscallReturn dupFunc(SyscallDesc *desc, int num, ThreadContext *tc); 2403079Sstever@eecs.umich.edu 24111908SBrandon.Potter@amd.com/// Target dup2() handler. 24213995Sbrandon.potter@amd.comSyscallReturn dup2Func(SyscallDesc *desc, int num, ThreadContext *tc); 24311908SBrandon.Potter@amd.com 24411875Sbrandon.potter@amd.com/// Target fcntl() handler. 24513995Sbrandon.potter@amd.comSyscallReturn fcntlFunc(SyscallDesc *desc, int num, ThreadContext *tc); 2462093SN/A 2472687Sksewell@umich.edu/// Target fcntl64() handler. 24813995Sbrandon.potter@amd.comSyscallReturn fcntl64Func(SyscallDesc *desc, int num, ThreadContext *tc); 2492687Sksewell@umich.edu 2502238SN/A/// Target setuid() handler. 25113995Sbrandon.potter@amd.comSyscallReturn setuidFunc(SyscallDesc *desc, int num, ThreadContext *tc); 2522238SN/A 25311908SBrandon.Potter@amd.com/// Target pipe() handler. 25413995Sbrandon.potter@amd.comSyscallReturn pipeFunc(SyscallDesc *desc, int num, ThreadContext *tc); 25511908SBrandon.Potter@amd.com 25611908SBrandon.Potter@amd.com/// Internal pipe() handler. 25713995Sbrandon.potter@amd.comSyscallReturn pipeImpl(SyscallDesc *desc, int num, ThreadContext *tc, 25814129Smatthew.sinclair@amd.com bool pseudo_pipe, bool is_pipe2=false); 25914129Smatthew.sinclair@amd.com 26014129Smatthew.sinclair@amd.com/// Target pipe() handler. 26114129Smatthew.sinclair@amd.comSyscallReturn pipe2Func(SyscallDesc *desc, int num, ThreadContext *tc); 26211908SBrandon.Potter@amd.com 2632238SN/A/// Target getpid() handler. 26413995Sbrandon.potter@amd.comSyscallReturn getpidFunc(SyscallDesc *desc, int num, ThreadContext *tc); 2652238SN/A 26613571Sbrandon.potter@amd.com// Target getpeername() handler. 26713995Sbrandon.potter@amd.comSyscallReturn getpeernameFunc(SyscallDesc *desc, int num, ThreadContext *tc); 26813571Sbrandon.potter@amd.com 26913568Sbrandon.potter@amd.com// Target bind() handler. 27013995Sbrandon.potter@amd.comSyscallReturn bindFunc(SyscallDesc *desc, int num, ThreadContext *tc); 27113568Sbrandon.potter@amd.com 27213568Sbrandon.potter@amd.com// Target listen() handler. 27313995Sbrandon.potter@amd.comSyscallReturn listenFunc(SyscallDesc *desc, int num, ThreadContext *tc); 27413568Sbrandon.potter@amd.com 27513568Sbrandon.potter@amd.com// Target connect() handler. 27613995Sbrandon.potter@amd.comSyscallReturn connectFunc(SyscallDesc *desc, int num, ThreadContext *tc); 27713568Sbrandon.potter@amd.com 27813448Sciro.santilli@arm.com#if defined(SYS_getdents) 27913031Sbrandon.potter@amd.com// Target getdents() handler. 28013995Sbrandon.potter@amd.comSyscallReturn getdentsFunc(SyscallDesc *desc, int num, ThreadContext *tc); 28113448Sciro.santilli@arm.com#endif 28213031Sbrandon.potter@amd.com 28313539Sjavier.setoain@arm.com#if defined(SYS_getdents64) 28413539Sjavier.setoain@arm.com// Target getdents() handler. 28513995Sbrandon.potter@amd.comSyscallReturn getdents64Func(SyscallDesc *desc, int num, ThreadContext *tc); 28613539Sjavier.setoain@arm.com#endif 28713539Sjavier.setoain@arm.com 28813569Sbrandon.potter@amd.com// Target sendto() handler. 28913995Sbrandon.potter@amd.comSyscallReturn sendtoFunc(SyscallDesc *desc, int num, ThreadContext *tc); 29013569Sbrandon.potter@amd.com 29113569Sbrandon.potter@amd.com// Target recvfrom() handler. 29213995Sbrandon.potter@amd.comSyscallReturn recvfromFunc(SyscallDesc *desc, int num, ThreadContext *tc); 29313569Sbrandon.potter@amd.com 29413569Sbrandon.potter@amd.com// Target recvmsg() handler. 29513995Sbrandon.potter@amd.comSyscallReturn recvmsgFunc(SyscallDesc *desc, int num, ThreadContext *tc); 29613569Sbrandon.potter@amd.com 29713569Sbrandon.potter@amd.com// Target sendmsg() handler. 29813995Sbrandon.potter@amd.comSyscallReturn sendmsgFunc(SyscallDesc *desc, int num, ThreadContext *tc); 29913569Sbrandon.potter@amd.com 30013031Sbrandon.potter@amd.com// Target getuid() handler. 30113995Sbrandon.potter@amd.comSyscallReturn getuidFunc(SyscallDesc *desc, int num, ThreadContext *tc); 3022238SN/A 3032238SN/A/// Target getgid() handler. 30413995Sbrandon.potter@amd.comSyscallReturn getgidFunc(SyscallDesc *desc, int num, ThreadContext *tc); 3052238SN/A 3062238SN/A/// Target getppid() handler. 30713995Sbrandon.potter@amd.comSyscallReturn getppidFunc(SyscallDesc *desc, int num, ThreadContext *tc); 3082238SN/A 3092238SN/A/// Target geteuid() handler. 31013995Sbrandon.potter@amd.comSyscallReturn geteuidFunc(SyscallDesc *desc, int num, ThreadContext *tc); 3112238SN/A 3122238SN/A/// Target getegid() handler. 31313995Sbrandon.potter@amd.comSyscallReturn getegidFunc(SyscallDesc *desc, int num, ThreadContext *tc); 3142238SN/A 3159455Smitch.hayenga+gem5@gmail.com/// Target access() handler 31613995Sbrandon.potter@amd.comSyscallReturn accessFunc(SyscallDesc *desc, int num, ThreadContext *tc); 31713995Sbrandon.potter@amd.comSyscallReturn accessFunc(SyscallDesc *desc, int num, ThreadContext *tc, 31811851Sbrandon.potter@amd.com int index); 3199455Smitch.hayenga+gem5@gmail.com 32013571Sbrandon.potter@amd.com// Target getsockopt() handler. 32113995Sbrandon.potter@amd.comSyscallReturn getsockoptFunc(SyscallDesc *desc, int num, ThreadContext *tc); 32213571Sbrandon.potter@amd.com 32313571Sbrandon.potter@amd.com// Target setsockopt() handler. 32413995Sbrandon.potter@amd.comSyscallReturn setsockoptFunc(SyscallDesc *desc, int num, ThreadContext *tc); 32513571Sbrandon.potter@amd.com 32613571Sbrandon.potter@amd.com// Target getsockname() handler. 32713995Sbrandon.potter@amd.comSyscallReturn getsocknameFunc(SyscallDesc *desc, int num, ThreadContext *tc); 32813571Sbrandon.potter@amd.com 3299112Smarc.orr@gmail.com/// Futex system call 33011906SBrandon.Potter@amd.com/// Implemented by Daniel Sanchez 33111906SBrandon.Potter@amd.com/// Used by printf's in multi-threaded apps 3329112Smarc.orr@gmail.comtemplate <class OS> 3339112Smarc.orr@gmail.comSyscallReturn 33413995Sbrandon.potter@amd.comfutexFunc(SyscallDesc *desc, int callnum, ThreadContext *tc) 3359112Smarc.orr@gmail.com{ 33611911SBrandon.Potter@amd.com using namespace std; 3379112Smarc.orr@gmail.com 33811911SBrandon.Potter@amd.com int index = 0; 33913995Sbrandon.potter@amd.com auto process = tc->getProcessPtr(); 34013995Sbrandon.potter@amd.com 34111911SBrandon.Potter@amd.com Addr uaddr = process->getSyscallArg(tc, index); 34211911SBrandon.Potter@amd.com int op = process->getSyscallArg(tc, index); 34311911SBrandon.Potter@amd.com int val = process->getSyscallArg(tc, index); 34413642Sqtt2@cornell.edu int timeout M5_VAR_USED = process->getSyscallArg(tc, index); 34513642Sqtt2@cornell.edu Addr uaddr2 M5_VAR_USED = process->getSyscallArg(tc, index); 34613642Sqtt2@cornell.edu int val3 = process->getSyscallArg(tc, index); 3479112Smarc.orr@gmail.com 34811911SBrandon.Potter@amd.com /* 34911911SBrandon.Potter@amd.com * Unsupported option that does not affect the correctness of the 35011911SBrandon.Potter@amd.com * application. This is a performance optimization utilized by Linux. 35111911SBrandon.Potter@amd.com */ 3529238Slluc.alvarez@bsc.es op &= ~OS::TGT_FUTEX_PRIVATE_FLAG; 35313642Sqtt2@cornell.edu op &= ~OS::TGT_FUTEX_CLOCK_REALTIME_FLAG; 3549112Smarc.orr@gmail.com 35511911SBrandon.Potter@amd.com FutexMap &futex_map = tc->getSystemPtr()->futexMap; 3569112Smarc.orr@gmail.com 35713642Sqtt2@cornell.edu if (OS::TGT_FUTEX_WAIT == op || OS::TGT_FUTEX_WAIT_BITSET == op) { 35811911SBrandon.Potter@amd.com // Ensure futex system call accessed atomically. 35911911SBrandon.Potter@amd.com BufferArg buf(uaddr, sizeof(int)); 36014024Sgabeblack@google.com buf.copyIn(tc->getVirtProxy()); 36111911SBrandon.Potter@amd.com int mem_val = *(int*)buf.bufferPtr(); 3629112Smarc.orr@gmail.com 36311911SBrandon.Potter@amd.com /* 36411911SBrandon.Potter@amd.com * The value in memory at uaddr is not equal with the expected val 36511911SBrandon.Potter@amd.com * (a different thread must have changed it before the system call was 36611911SBrandon.Potter@amd.com * invoked). In this case, we need to throw an error. 36711911SBrandon.Potter@amd.com */ 36811911SBrandon.Potter@amd.com if (val != mem_val) 3699112Smarc.orr@gmail.com return -OS::TGT_EWOULDBLOCK; 3709112Smarc.orr@gmail.com 37113642Sqtt2@cornell.edu if (OS::TGT_FUTEX_WAIT) { 37213642Sqtt2@cornell.edu futex_map.suspend(uaddr, process->tgid(), tc); 37313642Sqtt2@cornell.edu } else { 37413642Sqtt2@cornell.edu futex_map.suspend_bitset(uaddr, process->tgid(), tc, val3); 37513642Sqtt2@cornell.edu } 37611911SBrandon.Potter@amd.com 3779112Smarc.orr@gmail.com return 0; 37811911SBrandon.Potter@amd.com } else if (OS::TGT_FUTEX_WAKE == op) { 37911911SBrandon.Potter@amd.com return futex_map.wakeup(uaddr, process->tgid(), val); 38013642Sqtt2@cornell.edu } else if (OS::TGT_FUTEX_WAKE_BITSET == op) { 38113642Sqtt2@cornell.edu return futex_map.wakeup_bitset(uaddr, process->tgid(), val3); 38213650Smw828@cornell.edu } else if (OS::TGT_FUTEX_REQUEUE == op || 38313650Smw828@cornell.edu OS::TGT_FUTEX_CMP_REQUEUE == op) { 38413650Smw828@cornell.edu 38513650Smw828@cornell.edu // Ensure futex system call accessed atomically. 38613650Smw828@cornell.edu BufferArg buf(uaddr, sizeof(int)); 38714024Sgabeblack@google.com buf.copyIn(tc->getVirtProxy()); 38813650Smw828@cornell.edu int mem_val = *(int*)buf.bufferPtr(); 38913650Smw828@cornell.edu /* 39013650Smw828@cornell.edu * For CMP_REQUEUE, the whole operation is only started only if 39113650Smw828@cornell.edu * val3 is still the value of the futex pointed to by uaddr. 39213650Smw828@cornell.edu */ 39313650Smw828@cornell.edu if (OS::TGT_FUTEX_CMP_REQUEUE && val3 != mem_val) 39413650Smw828@cornell.edu return -OS::TGT_EWOULDBLOCK; 39513650Smw828@cornell.edu return futex_map.requeue(uaddr, process->tgid(), val, timeout, uaddr2); 39613651Smw828@cornell.edu } else if (OS::TGT_FUTEX_WAKE_OP == op) { 39713651Smw828@cornell.edu /* 39813651Smw828@cornell.edu * The FUTEX_WAKE_OP operation is equivalent to executing the 39913651Smw828@cornell.edu * following code atomically and totally ordered with respect to 40013651Smw828@cornell.edu * other futex operations on any of the two supplied futex words: 40113651Smw828@cornell.edu * 40213651Smw828@cornell.edu * int oldval = *(int *) addr2; 40313651Smw828@cornell.edu * *(int *) addr2 = oldval op oparg; 40413651Smw828@cornell.edu * futex(addr1, FUTEX_WAKE, val, 0, 0, 0); 40513651Smw828@cornell.edu * if (oldval cmp cmparg) 40613651Smw828@cornell.edu * futex(addr2, FUTEX_WAKE, val2, 0, 0, 0); 40713651Smw828@cornell.edu * 40813651Smw828@cornell.edu * (op, oparg, cmp, cmparg are encoded in val3) 40913651Smw828@cornell.edu * 41013651Smw828@cornell.edu * +---+---+-----------+-----------+ 41113651Smw828@cornell.edu * |op |cmp| oparg | cmparg | 41213651Smw828@cornell.edu * +---+---+-----------+-----------+ 41313651Smw828@cornell.edu * 4 4 12 12 <== # of bits 41413651Smw828@cornell.edu * 41513651Smw828@cornell.edu * reference: http://man7.org/linux/man-pages/man2/futex.2.html 41613651Smw828@cornell.edu * 41713651Smw828@cornell.edu */ 41813651Smw828@cornell.edu // get value from simulated-space 41913651Smw828@cornell.edu BufferArg buf(uaddr2, sizeof(int)); 42014024Sgabeblack@google.com buf.copyIn(tc->getVirtProxy()); 42113651Smw828@cornell.edu int oldval = *(int*)buf.bufferPtr(); 42213651Smw828@cornell.edu int newval = oldval; 42313651Smw828@cornell.edu // extract op, oparg, cmp, cmparg from val3 42413651Smw828@cornell.edu int wake_cmparg = val3 & 0xfff; 42513651Smw828@cornell.edu int wake_oparg = (val3 & 0xfff000) >> 12; 42613651Smw828@cornell.edu int wake_cmp = (val3 & 0xf000000) >> 24; 42713651Smw828@cornell.edu int wake_op = (val3 & 0xf0000000) >> 28; 42813651Smw828@cornell.edu if ((wake_op & OS::TGT_FUTEX_OP_ARG_SHIFT) >> 3 == 1) 42913651Smw828@cornell.edu wake_oparg = (1 << wake_oparg); 43013651Smw828@cornell.edu wake_op &= ~OS::TGT_FUTEX_OP_ARG_SHIFT; 43113651Smw828@cornell.edu // perform operation on the value of the second futex 43213651Smw828@cornell.edu if (wake_op == OS::TGT_FUTEX_OP_SET) 43313651Smw828@cornell.edu newval = wake_oparg; 43413651Smw828@cornell.edu else if (wake_op == OS::TGT_FUTEX_OP_ADD) 43513651Smw828@cornell.edu newval += wake_oparg; 43613651Smw828@cornell.edu else if (wake_op == OS::TGT_FUTEX_OP_OR) 43713651Smw828@cornell.edu newval |= wake_oparg; 43813651Smw828@cornell.edu else if (wake_op == OS::TGT_FUTEX_OP_ANDN) 43913651Smw828@cornell.edu newval &= ~wake_oparg; 44013651Smw828@cornell.edu else if (wake_op == OS::TGT_FUTEX_OP_XOR) 44113651Smw828@cornell.edu newval ^= wake_oparg; 44213651Smw828@cornell.edu // copy updated value back to simulated-space 44313651Smw828@cornell.edu *(int*)buf.bufferPtr() = newval; 44414024Sgabeblack@google.com buf.copyOut(tc->getVirtProxy()); 44513651Smw828@cornell.edu // perform the first wake-up 44613651Smw828@cornell.edu int woken1 = futex_map.wakeup(uaddr, process->tgid(), val); 44713651Smw828@cornell.edu int woken2 = 0; 44813651Smw828@cornell.edu // calculate the condition of the second wake-up 44913651Smw828@cornell.edu bool is_wake2 = false; 45013651Smw828@cornell.edu if (wake_cmp == OS::TGT_FUTEX_OP_CMP_EQ) 45113651Smw828@cornell.edu is_wake2 = oldval == wake_cmparg; 45213651Smw828@cornell.edu else if (wake_cmp == OS::TGT_FUTEX_OP_CMP_NE) 45313651Smw828@cornell.edu is_wake2 = oldval != wake_cmparg; 45413651Smw828@cornell.edu else if (wake_cmp == OS::TGT_FUTEX_OP_CMP_LT) 45513651Smw828@cornell.edu is_wake2 = oldval < wake_cmparg; 45613651Smw828@cornell.edu else if (wake_cmp == OS::TGT_FUTEX_OP_CMP_LE) 45713651Smw828@cornell.edu is_wake2 = oldval <= wake_cmparg; 45813651Smw828@cornell.edu else if (wake_cmp == OS::TGT_FUTEX_OP_CMP_GT) 45913651Smw828@cornell.edu is_wake2 = oldval > wake_cmparg; 46013651Smw828@cornell.edu else if (wake_cmp == OS::TGT_FUTEX_OP_CMP_GE) 46113651Smw828@cornell.edu is_wake2 = oldval >= wake_cmparg; 46213651Smw828@cornell.edu // perform the second wake-up 46313651Smw828@cornell.edu if (is_wake2) 46413651Smw828@cornell.edu woken2 = futex_map.wakeup(uaddr2, process->tgid(), timeout); 46513651Smw828@cornell.edu 46613651Smw828@cornell.edu return woken1 + woken2; 4679112Smarc.orr@gmail.com } 46811911SBrandon.Potter@amd.com warn("futex: op %d not implemented; ignoring.", op); 46911911SBrandon.Potter@amd.com return -ENOSYS; 4709112Smarc.orr@gmail.com} 4719112Smarc.orr@gmail.com 4722238SN/A 4732238SN/A/// Pseudo Funcs - These functions use a different return convension, 4742238SN/A/// returning a second value in a register other than the normal return register 47513995Sbrandon.potter@amd.comSyscallReturn pipePseudoFunc(SyscallDesc *desc, int num, ThreadContext *tc); 4762238SN/A 4772238SN/A/// Target getpidPseudo() handler. 47813995Sbrandon.potter@amd.comSyscallReturn getpidPseudoFunc(SyscallDesc *desc, int num, ThreadContext *tc); 4792238SN/A 4802238SN/A/// Target getuidPseudo() handler. 48113995Sbrandon.potter@amd.comSyscallReturn getuidPseudoFunc(SyscallDesc *desc, int num, ThreadContext *tc); 4822238SN/A 4832238SN/A/// Target getgidPseudo() handler. 48413995Sbrandon.potter@amd.comSyscallReturn getgidPseudoFunc(SyscallDesc *desc, int num, ThreadContext *tc); 4852238SN/A 4862238SN/A 4871354SN/A/// A readable name for 1,000,000, for converting microseconds to seconds. 4881354SN/Aconst int one_million = 1000000; 48910796Sbrandon.potter@amd.com/// A readable name for 1,000,000,000, for converting nanoseconds to seconds. 49010796Sbrandon.potter@amd.comconst int one_billion = 1000000000; 4911354SN/A 4921354SN/A/// Approximate seconds since the epoch (1/1/1970). About a billion, 4931354SN/A/// by my reckoning. We want to keep this a constant (not use the 4941354SN/A/// real-world time) to keep simulations repeatable. 4951354SN/Aconst unsigned seconds_since_epoch = 1000000000; 4961354SN/A 4971354SN/A/// Helper function to convert current elapsed time to seconds and 4981354SN/A/// microseconds. 4991354SN/Atemplate <class T1, class T2> 5001354SN/Avoid 50110796Sbrandon.potter@amd.comgetElapsedTimeMicro(T1 &sec, T2 &usec) 5021354SN/A{ 50310796Sbrandon.potter@amd.com uint64_t elapsed_usecs = curTick() / SimClock::Int::us; 5041354SN/A sec = elapsed_usecs / one_million; 5051354SN/A usec = elapsed_usecs % one_million; 5061354SN/A} 5071354SN/A 50810796Sbrandon.potter@amd.com/// Helper function to convert current elapsed time to seconds and 50910796Sbrandon.potter@amd.com/// nanoseconds. 51010796Sbrandon.potter@amd.comtemplate <class T1, class T2> 51110796Sbrandon.potter@amd.comvoid 51210796Sbrandon.potter@amd.comgetElapsedTimeNano(T1 &sec, T2 &nsec) 51310796Sbrandon.potter@amd.com{ 51410796Sbrandon.potter@amd.com uint64_t elapsed_nsecs = curTick() / SimClock::Int::ns; 51510796Sbrandon.potter@amd.com sec = elapsed_nsecs / one_billion; 51610796Sbrandon.potter@amd.com nsec = elapsed_nsecs % one_billion; 51710796Sbrandon.potter@amd.com} 51810796Sbrandon.potter@amd.com 519360SN/A////////////////////////////////////////////////////////////////////// 520360SN/A// 521360SN/A// The following emulation functions are generic, but need to be 522360SN/A// templated to account for differences in types, constants, etc. 523360SN/A// 524360SN/A////////////////////////////////////////////////////////////////////// 525360SN/A 52611759Sbrandon.potter@amd.com typedef struct statfs hst_statfs; 5273113Sgblack@eecs.umich.edu#if NO_STAT64 5283113Sgblack@eecs.umich.edu typedef struct stat hst_stat; 5293113Sgblack@eecs.umich.edu typedef struct stat hst_stat64; 5303113Sgblack@eecs.umich.edu#else 5313113Sgblack@eecs.umich.edu typedef struct stat hst_stat; 5323113Sgblack@eecs.umich.edu typedef struct stat64 hst_stat64; 5333113Sgblack@eecs.umich.edu#endif 5343113Sgblack@eecs.umich.edu 5353113Sgblack@eecs.umich.edu//// Helper function to convert a host stat buffer to a target stat 5363113Sgblack@eecs.umich.edu//// buffer. Also copies the target buffer out to the simulated 5373113Sgblack@eecs.umich.edu//// memory space. Used by stat(), fstat(), and lstat(). 5383113Sgblack@eecs.umich.edu 5393113Sgblack@eecs.umich.edutemplate <typename target_stat, typename host_stat> 54012032Sandreas.sandberg@arm.comvoid 5413113Sgblack@eecs.umich.educonvertStatBuf(target_stat &tgt, host_stat *host, bool fakeTTY = false) 5423113Sgblack@eecs.umich.edu{ 5434189Sgblack@eecs.umich.edu using namespace TheISA; 5444189Sgblack@eecs.umich.edu 5453113Sgblack@eecs.umich.edu if (fakeTTY) 5463113Sgblack@eecs.umich.edu tgt->st_dev = 0xA; 5473113Sgblack@eecs.umich.edu else 5483113Sgblack@eecs.umich.edu tgt->st_dev = host->st_dev; 5498737Skoansin.tan@gmail.com tgt->st_dev = TheISA::htog(tgt->st_dev); 5503113Sgblack@eecs.umich.edu tgt->st_ino = host->st_ino; 5518737Skoansin.tan@gmail.com tgt->st_ino = TheISA::htog(tgt->st_ino); 5523277Sgblack@eecs.umich.edu tgt->st_mode = host->st_mode; 5535515SMichael.Adler@intel.com if (fakeTTY) { 5545515SMichael.Adler@intel.com // Claim to be a character device 5555515SMichael.Adler@intel.com tgt->st_mode &= ~S_IFMT; // Clear S_IFMT 5565515SMichael.Adler@intel.com tgt->st_mode |= S_IFCHR; // Set S_IFCHR 5575515SMichael.Adler@intel.com } 5588737Skoansin.tan@gmail.com tgt->st_mode = TheISA::htog(tgt->st_mode); 5593277Sgblack@eecs.umich.edu tgt->st_nlink = host->st_nlink; 5608737Skoansin.tan@gmail.com tgt->st_nlink = TheISA::htog(tgt->st_nlink); 5613277Sgblack@eecs.umich.edu tgt->st_uid = host->st_uid; 5628737Skoansin.tan@gmail.com tgt->st_uid = TheISA::htog(tgt->st_uid); 5633277Sgblack@eecs.umich.edu tgt->st_gid = host->st_gid; 5648737Skoansin.tan@gmail.com tgt->st_gid = TheISA::htog(tgt->st_gid); 5653113Sgblack@eecs.umich.edu if (fakeTTY) 5663113Sgblack@eecs.umich.edu tgt->st_rdev = 0x880d; 5673113Sgblack@eecs.umich.edu else 5683113Sgblack@eecs.umich.edu tgt->st_rdev = host->st_rdev; 5698737Skoansin.tan@gmail.com tgt->st_rdev = TheISA::htog(tgt->st_rdev); 5703113Sgblack@eecs.umich.edu tgt->st_size = host->st_size; 5718737Skoansin.tan@gmail.com tgt->st_size = TheISA::htog(tgt->st_size); 5723114Sgblack@eecs.umich.edu tgt->st_atimeX = host->st_atime; 5738737Skoansin.tan@gmail.com tgt->st_atimeX = TheISA::htog(tgt->st_atimeX); 5743114Sgblack@eecs.umich.edu tgt->st_mtimeX = host->st_mtime; 5758737Skoansin.tan@gmail.com tgt->st_mtimeX = TheISA::htog(tgt->st_mtimeX); 5763114Sgblack@eecs.umich.edu tgt->st_ctimeX = host->st_ctime; 5778737Skoansin.tan@gmail.com tgt->st_ctimeX = TheISA::htog(tgt->st_ctimeX); 57811906SBrandon.Potter@amd.com // Force the block size to be 8KB. This helps to ensure buffered io works 5794061Sgblack@eecs.umich.edu // consistently across different hosts. 5804061Sgblack@eecs.umich.edu tgt->st_blksize = 0x2000; 5818737Skoansin.tan@gmail.com tgt->st_blksize = TheISA::htog(tgt->st_blksize); 5823113Sgblack@eecs.umich.edu tgt->st_blocks = host->st_blocks; 5838737Skoansin.tan@gmail.com tgt->st_blocks = TheISA::htog(tgt->st_blocks); 5843113Sgblack@eecs.umich.edu} 5853113Sgblack@eecs.umich.edu 5863113Sgblack@eecs.umich.edu// Same for stat64 5873113Sgblack@eecs.umich.edu 5883113Sgblack@eecs.umich.edutemplate <typename target_stat, typename host_stat64> 58912032Sandreas.sandberg@arm.comvoid 5903113Sgblack@eecs.umich.educonvertStat64Buf(target_stat &tgt, host_stat64 *host, bool fakeTTY = false) 5913113Sgblack@eecs.umich.edu{ 5924189Sgblack@eecs.umich.edu using namespace TheISA; 5934189Sgblack@eecs.umich.edu 5943113Sgblack@eecs.umich.edu convertStatBuf<target_stat, host_stat64>(tgt, host, fakeTTY); 5953113Sgblack@eecs.umich.edu#if defined(STAT_HAVE_NSEC) 5963113Sgblack@eecs.umich.edu tgt->st_atime_nsec = host->st_atime_nsec; 5978737Skoansin.tan@gmail.com tgt->st_atime_nsec = TheISA::htog(tgt->st_atime_nsec); 5983113Sgblack@eecs.umich.edu tgt->st_mtime_nsec = host->st_mtime_nsec; 5998737Skoansin.tan@gmail.com tgt->st_mtime_nsec = TheISA::htog(tgt->st_mtime_nsec); 6003113Sgblack@eecs.umich.edu tgt->st_ctime_nsec = host->st_ctime_nsec; 6018737Skoansin.tan@gmail.com tgt->st_ctime_nsec = TheISA::htog(tgt->st_ctime_nsec); 6023113Sgblack@eecs.umich.edu#else 6033113Sgblack@eecs.umich.edu tgt->st_atime_nsec = 0; 6043113Sgblack@eecs.umich.edu tgt->st_mtime_nsec = 0; 6053113Sgblack@eecs.umich.edu tgt->st_ctime_nsec = 0; 6063113Sgblack@eecs.umich.edu#endif 6073113Sgblack@eecs.umich.edu} 6083113Sgblack@eecs.umich.edu 60911906SBrandon.Potter@amd.com// Here are a couple of convenience functions 6103113Sgblack@eecs.umich.edutemplate<class OS> 61112032Sandreas.sandberg@arm.comvoid 61214020Sgabeblack@google.comcopyOutStatBuf(PortProxy &mem, Addr addr, 61311906SBrandon.Potter@amd.com hst_stat *host, bool fakeTTY = false) 6143113Sgblack@eecs.umich.edu{ 6153113Sgblack@eecs.umich.edu typedef TypedBufferArg<typename OS::tgt_stat> tgt_stat_buf; 6163113Sgblack@eecs.umich.edu tgt_stat_buf tgt(addr); 6173113Sgblack@eecs.umich.edu convertStatBuf<tgt_stat_buf, hst_stat>(tgt, host, fakeTTY); 6183113Sgblack@eecs.umich.edu tgt.copyOut(mem); 6193113Sgblack@eecs.umich.edu} 6203113Sgblack@eecs.umich.edu 6213113Sgblack@eecs.umich.edutemplate<class OS> 62212032Sandreas.sandberg@arm.comvoid 62314020Sgabeblack@google.comcopyOutStat64Buf(PortProxy &mem, Addr addr, 62411906SBrandon.Potter@amd.com hst_stat64 *host, bool fakeTTY = false) 6253113Sgblack@eecs.umich.edu{ 6263113Sgblack@eecs.umich.edu typedef TypedBufferArg<typename OS::tgt_stat64> tgt_stat_buf; 6273113Sgblack@eecs.umich.edu tgt_stat_buf tgt(addr); 6286686Stjones1@inf.ed.ac.uk convertStat64Buf<tgt_stat_buf, hst_stat64>(tgt, host, fakeTTY); 6293113Sgblack@eecs.umich.edu tgt.copyOut(mem); 6303113Sgblack@eecs.umich.edu} 6313113Sgblack@eecs.umich.edu 63211759Sbrandon.potter@amd.comtemplate <class OS> 63312032Sandreas.sandberg@arm.comvoid 63414020Sgabeblack@google.comcopyOutStatfsBuf(PortProxy &mem, Addr addr, 63511759Sbrandon.potter@amd.com hst_statfs *host) 63611759Sbrandon.potter@amd.com{ 63711759Sbrandon.potter@amd.com TypedBufferArg<typename OS::tgt_statfs> tgt(addr); 63811759Sbrandon.potter@amd.com 63911812Sbaz21@cam.ac.uk tgt->f_type = TheISA::htog(host->f_type); 64011812Sbaz21@cam.ac.uk#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) 64111812Sbaz21@cam.ac.uk tgt->f_bsize = TheISA::htog(host->f_iosize); 64211759Sbrandon.potter@amd.com#else 64311812Sbaz21@cam.ac.uk tgt->f_bsize = TheISA::htog(host->f_bsize); 64411759Sbrandon.potter@amd.com#endif 64511759Sbrandon.potter@amd.com tgt->f_blocks = TheISA::htog(host->f_blocks); 64611759Sbrandon.potter@amd.com tgt->f_bfree = TheISA::htog(host->f_bfree); 64711759Sbrandon.potter@amd.com tgt->f_bavail = TheISA::htog(host->f_bavail); 64811759Sbrandon.potter@amd.com tgt->f_files = TheISA::htog(host->f_files); 64911759Sbrandon.potter@amd.com tgt->f_ffree = TheISA::htog(host->f_ffree); 65011759Sbrandon.potter@amd.com memcpy(&tgt->f_fsid, &host->f_fsid, sizeof(host->f_fsid)); 65111812Sbaz21@cam.ac.uk#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) 65211812Sbaz21@cam.ac.uk tgt->f_namelen = TheISA::htog(host->f_namemax); 65311812Sbaz21@cam.ac.uk tgt->f_frsize = TheISA::htog(host->f_bsize); 65411812Sbaz21@cam.ac.uk#elif defined(__APPLE__) 65511812Sbaz21@cam.ac.uk tgt->f_namelen = 0; 65611812Sbaz21@cam.ac.uk tgt->f_frsize = 0; 65711812Sbaz21@cam.ac.uk#else 65811759Sbrandon.potter@amd.com tgt->f_namelen = TheISA::htog(host->f_namelen); 65911759Sbrandon.potter@amd.com tgt->f_frsize = TheISA::htog(host->f_frsize); 66011812Sbaz21@cam.ac.uk#endif 66111812Sbaz21@cam.ac.uk#if defined(__linux__) 66211759Sbrandon.potter@amd.com memcpy(&tgt->f_spare, &host->f_spare, sizeof(host->f_spare)); 66311812Sbaz21@cam.ac.uk#else 66411812Sbaz21@cam.ac.uk /* 66511812Sbaz21@cam.ac.uk * The fields are different sizes per OS. Don't bother with 66611812Sbaz21@cam.ac.uk * f_spare or f_reserved on non-Linux for now. 66711812Sbaz21@cam.ac.uk */ 66811812Sbaz21@cam.ac.uk memset(&tgt->f_spare, 0, sizeof(tgt->f_spare)); 66911812Sbaz21@cam.ac.uk#endif 67011759Sbrandon.potter@amd.com 67111759Sbrandon.potter@amd.com tgt.copyOut(mem); 67211759Sbrandon.potter@amd.com} 67311759Sbrandon.potter@amd.com 674378SN/A/// Target ioctl() handler. For the most part, programs call ioctl() 675378SN/A/// only to find out if their stdout is a tty, to determine whether to 6769141Smarc.orr@gmail.com/// do line or block buffering. We always claim that output fds are 6779141Smarc.orr@gmail.com/// not TTYs to provide repeatable results. 678360SN/Atemplate <class OS> 6791450SN/ASyscallReturn 68013995Sbrandon.potter@amd.comioctlFunc(SyscallDesc *desc, int callnum, ThreadContext *tc) 681360SN/A{ 6826701Sgblack@eecs.umich.edu int index = 0; 68313995Sbrandon.potter@amd.com auto p = tc->getProcessPtr(); 68413995Sbrandon.potter@amd.com 68511856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 68611856Sbrandon.potter@amd.com unsigned req = p->getSyscallArg(tc, index); 687360SN/A 68813907Salexandru.dutu@amd.com DPRINTF_SYSCALL(Verbose, "ioctl(%d, 0x%x, ...)\n", tgt_fd, req); 689360SN/A 69011856Sbrandon.potter@amd.com if (OS::isTtyReq(req)) 69111856Sbrandon.potter@amd.com return -ENOTTY; 69210496Ssteve.reinhardt@amd.com 69311856Sbrandon.potter@amd.com auto dfdp = std::dynamic_pointer_cast<DeviceFDEntry>((*p->fds)[tgt_fd]); 69413902Sbrandon.potter@amd.com if (dfdp) { 69513902Sbrandon.potter@amd.com EmulatedDriver *emul_driver = dfdp->getDriver(); 69613902Sbrandon.potter@amd.com if (emul_driver) 69713995Sbrandon.potter@amd.com return emul_driver->ioctl(tc, req); 69813902Sbrandon.potter@amd.com } 69913902Sbrandon.potter@amd.com 70013902Sbrandon.potter@amd.com auto sfdp = std::dynamic_pointer_cast<SocketFDEntry>((*p->fds)[tgt_fd]); 70113902Sbrandon.potter@amd.com if (sfdp) { 70213902Sbrandon.potter@amd.com int status; 70313902Sbrandon.potter@amd.com 70413902Sbrandon.potter@amd.com switch (req) { 70513902Sbrandon.potter@amd.com case SIOCGIFCONF: { 70613902Sbrandon.potter@amd.com Addr conf_addr = p->getSyscallArg(tc, index); 70713902Sbrandon.potter@amd.com BufferArg conf_arg(conf_addr, sizeof(ifconf)); 70814024Sgabeblack@google.com conf_arg.copyIn(tc->getVirtProxy()); 70913902Sbrandon.potter@amd.com 71013902Sbrandon.potter@amd.com ifconf *conf = (ifconf*)conf_arg.bufferPtr(); 71113902Sbrandon.potter@amd.com Addr ifc_buf_addr = (Addr)conf->ifc_buf; 71213902Sbrandon.potter@amd.com BufferArg ifc_buf_arg(ifc_buf_addr, conf->ifc_len); 71314024Sgabeblack@google.com ifc_buf_arg.copyIn(tc->getVirtProxy()); 71413902Sbrandon.potter@amd.com 71513902Sbrandon.potter@amd.com conf->ifc_buf = (char*)ifc_buf_arg.bufferPtr(); 71613902Sbrandon.potter@amd.com 71713902Sbrandon.potter@amd.com status = ioctl(sfdp->getSimFD(), req, conf_arg.bufferPtr()); 71813902Sbrandon.potter@amd.com if (status != -1) { 71913902Sbrandon.potter@amd.com conf->ifc_buf = (char*)ifc_buf_addr; 72014024Sgabeblack@google.com ifc_buf_arg.copyOut(tc->getVirtProxy()); 72114024Sgabeblack@google.com conf_arg.copyOut(tc->getVirtProxy()); 72213902Sbrandon.potter@amd.com } 72313902Sbrandon.potter@amd.com 72413902Sbrandon.potter@amd.com return status; 72513902Sbrandon.potter@amd.com } 72613902Sbrandon.potter@amd.com case SIOCGIFFLAGS: 72713936SAndrea.Mondelli@ucf.edu#if defined(__linux__) 72813902Sbrandon.potter@amd.com case SIOCGIFINDEX: 72913902Sbrandon.potter@amd.com#endif 73013902Sbrandon.potter@amd.com case SIOCGIFNETMASK: 73113902Sbrandon.potter@amd.com case SIOCGIFADDR: 73213936SAndrea.Mondelli@ucf.edu#if defined(__linux__) 73313902Sbrandon.potter@amd.com case SIOCGIFHWADDR: 73413902Sbrandon.potter@amd.com#endif 73513902Sbrandon.potter@amd.com case SIOCGIFMTU: { 73613902Sbrandon.potter@amd.com Addr req_addr = p->getSyscallArg(tc, index); 73713902Sbrandon.potter@amd.com BufferArg req_arg(req_addr, sizeof(ifreq)); 73814024Sgabeblack@google.com req_arg.copyIn(tc->getVirtProxy()); 73913902Sbrandon.potter@amd.com 74013902Sbrandon.potter@amd.com status = ioctl(sfdp->getSimFD(), req, req_arg.bufferPtr()); 74113902Sbrandon.potter@amd.com if (status != -1) 74214024Sgabeblack@google.com req_arg.copyOut(tc->getVirtProxy()); 74313902Sbrandon.potter@amd.com return status; 74413902Sbrandon.potter@amd.com } 74513902Sbrandon.potter@amd.com } 74613902Sbrandon.potter@amd.com } 74710496Ssteve.reinhardt@amd.com 74811856Sbrandon.potter@amd.com /** 74911856Sbrandon.potter@amd.com * For lack of a better return code, return ENOTTY. Ideally, we should 75011856Sbrandon.potter@amd.com * return something better here, but at least we issue the warning. 75111856Sbrandon.potter@amd.com */ 75211856Sbrandon.potter@amd.com warn("Unsupported ioctl call (return ENOTTY): ioctl(%d, 0x%x, ...) @ \n", 75310930Sbrandon.potter@amd.com tgt_fd, req, tc->pcState()); 7549141Smarc.orr@gmail.com return -ENOTTY; 755360SN/A} 756360SN/A 757360SN/Atemplate <class OS> 75811907SBrandon.Potter@amd.comSyscallReturn 75913995Sbrandon.potter@amd.comopenImpl(SyscallDesc *desc, int callnum, ThreadContext *tc, bool isopenat) 760360SN/A{ 76111907SBrandon.Potter@amd.com int index = 0; 76213995Sbrandon.potter@amd.com auto p = tc->getProcessPtr(); 76311907SBrandon.Potter@amd.com int tgt_dirfd = -1; 76411907SBrandon.Potter@amd.com 76511907SBrandon.Potter@amd.com /** 76611907SBrandon.Potter@amd.com * If using the openat variant, read in the target directory file 76711907SBrandon.Potter@amd.com * descriptor from the simulated process. 76811907SBrandon.Potter@amd.com */ 76911907SBrandon.Potter@amd.com if (isopenat) 77011907SBrandon.Potter@amd.com tgt_dirfd = p->getSyscallArg(tc, index); 77111907SBrandon.Potter@amd.com 77211907SBrandon.Potter@amd.com /** 77311907SBrandon.Potter@amd.com * Retrieve the simulated process' memory proxy and then read in the path 77411907SBrandon.Potter@amd.com * string from that memory space into the host's working memory space. 77511907SBrandon.Potter@amd.com */ 776360SN/A std::string path; 77714024Sgabeblack@google.com if (!tc->getVirtProxy().tryReadString(path, p->getSyscallArg(tc, index))) 7781458SN/A return -EFAULT; 779360SN/A 78011907SBrandon.Potter@amd.com#ifdef __CYGWIN32__ 78111907SBrandon.Potter@amd.com int host_flags = O_BINARY; 78211907SBrandon.Potter@amd.com#else 78311907SBrandon.Potter@amd.com int host_flags = 0; 78411907SBrandon.Potter@amd.com#endif 78511907SBrandon.Potter@amd.com /** 78611907SBrandon.Potter@amd.com * Translate target flags into host flags. Flags exist which are not 78711907SBrandon.Potter@amd.com * ported between architectures which can cause check failures. 78811907SBrandon.Potter@amd.com */ 78911907SBrandon.Potter@amd.com int tgt_flags = p->getSyscallArg(tc, index); 790360SN/A for (int i = 0; i < OS::NUM_OPEN_FLAGS; i++) { 79111907SBrandon.Potter@amd.com if (tgt_flags & OS::openFlagTable[i].tgtFlag) { 79211907SBrandon.Potter@amd.com tgt_flags &= ~OS::openFlagTable[i].tgtFlag; 79311907SBrandon.Potter@amd.com host_flags |= OS::openFlagTable[i].hostFlag; 794360SN/A } 795360SN/A } 79611907SBrandon.Potter@amd.com if (tgt_flags) { 79711907SBrandon.Potter@amd.com warn("open%s: cannot decode flags 0x%x", 79811907SBrandon.Potter@amd.com isopenat ? "at" : "", tgt_flags); 79911907SBrandon.Potter@amd.com } 800360SN/A#ifdef __CYGWIN32__ 80111907SBrandon.Potter@amd.com host_flags |= O_BINARY; 802360SN/A#endif 803360SN/A 80411907SBrandon.Potter@amd.com int mode = p->getSyscallArg(tc, index); 8053669Sbinkertn@umich.edu 80611907SBrandon.Potter@amd.com /** 80711907SBrandon.Potter@amd.com * If the simulated process called open or openat with AT_FDCWD specified, 80811907SBrandon.Potter@amd.com * take the current working directory value which was passed into the 80911907SBrandon.Potter@amd.com * process class as a Python parameter and append the current path to 81011907SBrandon.Potter@amd.com * create a full path. 81111907SBrandon.Potter@amd.com * Otherwise, openat with a valid target directory file descriptor has 81211907SBrandon.Potter@amd.com * been called. If the path option, which was passed in as a parameter, 81311907SBrandon.Potter@amd.com * is not absolute, retrieve the directory file descriptor's path and 81411907SBrandon.Potter@amd.com * prepend it to the path passed in as a parameter. 81511907SBrandon.Potter@amd.com * In every case, we should have a full path (which is relevant to the 81611907SBrandon.Potter@amd.com * host) to work with after this block has been passed. 81711907SBrandon.Potter@amd.com */ 81813883Sdavid.hashe@amd.com std::string redir_path = path; 81913883Sdavid.hashe@amd.com std::string abs_path = path; 82013883Sdavid.hashe@amd.com if (!isopenat || tgt_dirfd == OS::TGT_AT_FDCWD) { 82113883Sdavid.hashe@amd.com abs_path = p->absolutePath(path, true); 82213883Sdavid.hashe@amd.com redir_path = p->checkPathRedirect(path); 82311907SBrandon.Potter@amd.com } else if (!startswith(path, "/")) { 82411907SBrandon.Potter@amd.com std::shared_ptr<FDEntry> fdep = ((*p->fds)[tgt_dirfd]); 82511907SBrandon.Potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(fdep); 82611907SBrandon.Potter@amd.com if (!ffdp) 82711907SBrandon.Potter@amd.com return -EBADF; 82813883Sdavid.hashe@amd.com abs_path = ffdp->getFileName() + path; 82913883Sdavid.hashe@amd.com redir_path = p->checkPathRedirect(abs_path); 83011907SBrandon.Potter@amd.com } 8311706SN/A 83211907SBrandon.Potter@amd.com /** 83311907SBrandon.Potter@amd.com * Since this is an emulated environment, we create pseudo file 83411907SBrandon.Potter@amd.com * descriptors for device requests that have been registered with 83511907SBrandon.Potter@amd.com * the process class through Python; this allows us to create a file 83611907SBrandon.Potter@amd.com * descriptor for subsequent ioctl or mmap calls. 83711907SBrandon.Potter@amd.com */ 83813883Sdavid.hashe@amd.com if (startswith(abs_path, "/dev/")) { 83913883Sdavid.hashe@amd.com std::string filename = abs_path.substr(strlen("/dev/")); 84011907SBrandon.Potter@amd.com EmulatedDriver *drv = p->findDriver(filename); 84111907SBrandon.Potter@amd.com if (drv) { 84211907SBrandon.Potter@amd.com DPRINTF_SYSCALL(Verbose, "open%s: passing call to " 84311907SBrandon.Potter@amd.com "driver open with path[%s]\n", 84413883Sdavid.hashe@amd.com isopenat ? "at" : "", abs_path.c_str()); 84513995Sbrandon.potter@amd.com return drv->open(tc, mode, host_flags); 84610496Ssteve.reinhardt@amd.com } 84711907SBrandon.Potter@amd.com /** 84811907SBrandon.Potter@amd.com * Fall through here for pass through to host devices, such 84911907SBrandon.Potter@amd.com * as /dev/zero 85011907SBrandon.Potter@amd.com */ 85110496Ssteve.reinhardt@amd.com } 85210496Ssteve.reinhardt@amd.com 85311907SBrandon.Potter@amd.com /** 85413883Sdavid.hashe@amd.com * We make several attempts resolve a call to open. 85513883Sdavid.hashe@amd.com * 85613883Sdavid.hashe@amd.com * 1) Resolve any path redirection before hand. This will set the path 85713883Sdavid.hashe@amd.com * up with variable 'redir_path' which may contain a modified path or 85813883Sdavid.hashe@amd.com * the original path value. This should already be done in prior code. 85913883Sdavid.hashe@amd.com * 2) Try to handle the access using 'special_paths'. Some special_paths 86013883Sdavid.hashe@amd.com * and files cannot be called on the host and need to be handled as 86113883Sdavid.hashe@amd.com * special cases inside the simulator. These special_paths are handled by 86213883Sdavid.hashe@amd.com * C++ routines to provide output back to userspace. 86313883Sdavid.hashe@amd.com * 3) If the full path that was created above does not match any of the 86413883Sdavid.hashe@amd.com * special cases, pass it through to the open call on the __HOST__ to let 86513883Sdavid.hashe@amd.com * the host open the file on our behalf. Again, the openImpl tries to 86613883Sdavid.hashe@amd.com * USE_THE_HOST_FILESYSTEM_OPEN (with a possible redirection to the 86713883Sdavid.hashe@amd.com * faux-filesystem files). The faux-filesystem is dynamically created 86813883Sdavid.hashe@amd.com * during simulator configuration using Python functions. 86913883Sdavid.hashe@amd.com * 4) If the host cannot open the file, the open attempt failed in "3)". 87013883Sdavid.hashe@amd.com * Return the host's error code back through the system call to the 87113883Sdavid.hashe@amd.com * simulated process. If running a debug trace, also notify the user that 87213883Sdavid.hashe@amd.com * the open call failed. 87313883Sdavid.hashe@amd.com * 87413883Sdavid.hashe@amd.com * Any success will set sim_fd to something other than -1 and skip the 87513883Sdavid.hashe@amd.com * next conditions effectively bypassing them. 87611907SBrandon.Potter@amd.com */ 87711907SBrandon.Potter@amd.com int sim_fd = -1; 87813883Sdavid.hashe@amd.com std::string used_path; 87911907SBrandon.Potter@amd.com std::vector<std::string> special_paths = 88013994Santhony.gutierrez@amd.com { "/proc/meminfo/", "/system/", "/platform/", "/etc/passwd" }; 88111907SBrandon.Potter@amd.com for (auto entry : special_paths) { 88213883Sdavid.hashe@amd.com if (startswith(path, entry)) { 88313883Sdavid.hashe@amd.com sim_fd = OS::openSpecialFile(abs_path, p, tc); 88413883Sdavid.hashe@amd.com used_path = abs_path; 88513883Sdavid.hashe@amd.com } 88611907SBrandon.Potter@amd.com } 88711907SBrandon.Potter@amd.com if (sim_fd == -1) { 88813883Sdavid.hashe@amd.com sim_fd = open(redir_path.c_str(), host_flags, mode); 88913883Sdavid.hashe@amd.com used_path = redir_path; 89011907SBrandon.Potter@amd.com } 89111907SBrandon.Potter@amd.com if (sim_fd == -1) { 89211907SBrandon.Potter@amd.com int local = -errno; 89313883Sdavid.hashe@amd.com DPRINTF_SYSCALL(Verbose, "open%s: failed -> path:%s " 89413883Sdavid.hashe@amd.com "(inferred from:%s)\n", isopenat ? "at" : "", 89513883Sdavid.hashe@amd.com used_path.c_str(), path.c_str()); 89611907SBrandon.Potter@amd.com return local; 89711907SBrandon.Potter@amd.com } 898360SN/A 89911907SBrandon.Potter@amd.com /** 90011907SBrandon.Potter@amd.com * The file was opened successfully and needs to be recorded in the 90111907SBrandon.Potter@amd.com * process' file descriptor array so that it can be retrieved later. 90211907SBrandon.Potter@amd.com * The target file descriptor that is chosen will be the lowest unused 90311907SBrandon.Potter@amd.com * file descriptor. 90411907SBrandon.Potter@amd.com * Return the indirect target file descriptor back to the simulated 90511907SBrandon.Potter@amd.com * process to act as a handle for the opened file. 90611907SBrandon.Potter@amd.com */ 90711907SBrandon.Potter@amd.com auto ffdp = std::make_shared<FileFDEntry>(sim_fd, host_flags, path, 0); 90811907SBrandon.Potter@amd.com int tgt_fd = p->fds->allocFD(ffdp); 90913883Sdavid.hashe@amd.com DPRINTF_SYSCALL(Verbose, "open%s: sim_fd[%d], target_fd[%d] -> path:%s\n" 91013883Sdavid.hashe@amd.com "(inferred from:%s)\n", isopenat ? "at" : "", 91113883Sdavid.hashe@amd.com sim_fd, tgt_fd, used_path.c_str(), path.c_str()); 91211907SBrandon.Potter@amd.com return tgt_fd; 913360SN/A} 914360SN/A 91510027SChris.Adeniyi-Jones@arm.com/// Target open() handler. 91610027SChris.Adeniyi-Jones@arm.comtemplate <class OS> 91710027SChris.Adeniyi-Jones@arm.comSyscallReturn 91813995Sbrandon.potter@amd.comopenFunc(SyscallDesc *desc, int callnum, ThreadContext *tc) 91910027SChris.Adeniyi-Jones@arm.com{ 92013995Sbrandon.potter@amd.com return openImpl<OS>(desc, callnum, tc, false); 92110027SChris.Adeniyi-Jones@arm.com} 92210027SChris.Adeniyi-Jones@arm.com 92310027SChris.Adeniyi-Jones@arm.com/// Target openat() handler. 92410027SChris.Adeniyi-Jones@arm.comtemplate <class OS> 92510027SChris.Adeniyi-Jones@arm.comSyscallReturn 92613995Sbrandon.potter@amd.comopenatFunc(SyscallDesc *desc, int callnum, ThreadContext *tc) 92710027SChris.Adeniyi-Jones@arm.com{ 92813995Sbrandon.potter@amd.com return openImpl<OS>(desc, callnum, tc, true); 92910027SChris.Adeniyi-Jones@arm.com} 93010027SChris.Adeniyi-Jones@arm.com 93110633Smichaelupton@gmail.com/// Target unlinkat() handler. 93210633Smichaelupton@gmail.comtemplate <class OS> 93310633Smichaelupton@gmail.comSyscallReturn 93413995Sbrandon.potter@amd.comunlinkatFunc(SyscallDesc *desc, int callnum, ThreadContext *tc) 93510633Smichaelupton@gmail.com{ 93610633Smichaelupton@gmail.com int index = 0; 93713995Sbrandon.potter@amd.com auto process = tc->getProcessPtr(); 93810633Smichaelupton@gmail.com int dirfd = process->getSyscallArg(tc, index); 93910633Smichaelupton@gmail.com if (dirfd != OS::TGT_AT_FDCWD) 94010633Smichaelupton@gmail.com warn("unlinkat: first argument not AT_FDCWD; unlikely to work"); 94110633Smichaelupton@gmail.com 94213995Sbrandon.potter@amd.com return unlinkHelper(desc, callnum, tc, 1); 94310633Smichaelupton@gmail.com} 94410633Smichaelupton@gmail.com 94510203SAli.Saidi@ARM.com/// Target facessat() handler 94610203SAli.Saidi@ARM.comtemplate <class OS> 94710203SAli.Saidi@ARM.comSyscallReturn 94813995Sbrandon.potter@amd.comfaccessatFunc(SyscallDesc *desc, int callnum, ThreadContext *tc) 94910203SAli.Saidi@ARM.com{ 95010203SAli.Saidi@ARM.com int index = 0; 95113995Sbrandon.potter@amd.com auto process = tc->getProcessPtr(); 95210203SAli.Saidi@ARM.com int dirfd = process->getSyscallArg(tc, index); 95310203SAli.Saidi@ARM.com if (dirfd != OS::TGT_AT_FDCWD) 95410203SAli.Saidi@ARM.com warn("faccessat: first argument not AT_FDCWD; unlikely to work"); 95513995Sbrandon.potter@amd.com return accessFunc(desc, callnum, tc, 1); 95610203SAli.Saidi@ARM.com} 95710203SAli.Saidi@ARM.com 95810203SAli.Saidi@ARM.com/// Target readlinkat() handler 95910203SAli.Saidi@ARM.comtemplate <class OS> 96010203SAli.Saidi@ARM.comSyscallReturn 96113995Sbrandon.potter@amd.comreadlinkatFunc(SyscallDesc *desc, int callnum, ThreadContext *tc) 96210203SAli.Saidi@ARM.com{ 96310203SAli.Saidi@ARM.com int index = 0; 96413995Sbrandon.potter@amd.com auto process = tc->getProcessPtr(); 96510203SAli.Saidi@ARM.com int dirfd = process->getSyscallArg(tc, index); 96610203SAli.Saidi@ARM.com if (dirfd != OS::TGT_AT_FDCWD) 96710203SAli.Saidi@ARM.com warn("openat: first argument not AT_FDCWD; unlikely to work"); 96813995Sbrandon.potter@amd.com return readlinkFunc(desc, callnum, tc, 1); 96910203SAli.Saidi@ARM.com} 97010203SAli.Saidi@ARM.com 97110850SGiacomo.Gabrielli@arm.com/// Target renameat() handler. 97210850SGiacomo.Gabrielli@arm.comtemplate <class OS> 97310850SGiacomo.Gabrielli@arm.comSyscallReturn 97413995Sbrandon.potter@amd.comrenameatFunc(SyscallDesc *desc, int callnum, ThreadContext *tc) 97510850SGiacomo.Gabrielli@arm.com{ 97610850SGiacomo.Gabrielli@arm.com int index = 0; 97713995Sbrandon.potter@amd.com auto process = tc->getProcessPtr(); 97810850SGiacomo.Gabrielli@arm.com 97910850SGiacomo.Gabrielli@arm.com int olddirfd = process->getSyscallArg(tc, index); 98010850SGiacomo.Gabrielli@arm.com if (olddirfd != OS::TGT_AT_FDCWD) 98110850SGiacomo.Gabrielli@arm.com warn("renameat: first argument not AT_FDCWD; unlikely to work"); 98210850SGiacomo.Gabrielli@arm.com 98310850SGiacomo.Gabrielli@arm.com std::string old_name; 98410850SGiacomo.Gabrielli@arm.com 98514024Sgabeblack@google.com if (!tc->getVirtProxy().tryReadString(old_name, 98610850SGiacomo.Gabrielli@arm.com process->getSyscallArg(tc, index))) 98710850SGiacomo.Gabrielli@arm.com return -EFAULT; 98810850SGiacomo.Gabrielli@arm.com 98910850SGiacomo.Gabrielli@arm.com int newdirfd = process->getSyscallArg(tc, index); 99010850SGiacomo.Gabrielli@arm.com if (newdirfd != OS::TGT_AT_FDCWD) 99110850SGiacomo.Gabrielli@arm.com warn("renameat: third argument not AT_FDCWD; unlikely to work"); 99210850SGiacomo.Gabrielli@arm.com 99310850SGiacomo.Gabrielli@arm.com std::string new_name; 99410850SGiacomo.Gabrielli@arm.com 99514024Sgabeblack@google.com if (!tc->getVirtProxy().tryReadString(new_name, 99610850SGiacomo.Gabrielli@arm.com process->getSyscallArg(tc, index))) 99710850SGiacomo.Gabrielli@arm.com return -EFAULT; 99810850SGiacomo.Gabrielli@arm.com 99913883Sdavid.hashe@amd.com // Adjust path for cwd and redirection 100013883Sdavid.hashe@amd.com old_name = process->checkPathRedirect(old_name); 100113883Sdavid.hashe@amd.com new_name = process->checkPathRedirect(new_name); 100210850SGiacomo.Gabrielli@arm.com 100310850SGiacomo.Gabrielli@arm.com int result = rename(old_name.c_str(), new_name.c_str()); 100410850SGiacomo.Gabrielli@arm.com return (result == -1) ? -errno : result; 100510850SGiacomo.Gabrielli@arm.com} 100610850SGiacomo.Gabrielli@arm.com 10076640Svince@csl.cornell.edu/// Target sysinfo() handler. 10086640Svince@csl.cornell.edutemplate <class OS> 10096640Svince@csl.cornell.eduSyscallReturn 101013995Sbrandon.potter@amd.comsysinfoFunc(SyscallDesc *desc, int callnum, ThreadContext *tc) 10116640Svince@csl.cornell.edu{ 10126701Sgblack@eecs.umich.edu int index = 0; 101313995Sbrandon.potter@amd.com auto process = tc->getProcessPtr(); 101413995Sbrandon.potter@amd.com 10156701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::tgt_sysinfo> 101610793Sbrandon.potter@amd.com sysinfo(process->getSyscallArg(tc, index)); 10176640Svince@csl.cornell.edu 101811758Sbrandon.potter@amd.com sysinfo->uptime = seconds_since_epoch; 101911758Sbrandon.potter@amd.com sysinfo->totalram = process->system->memSize(); 102011758Sbrandon.potter@amd.com sysinfo->mem_unit = 1; 10216640Svince@csl.cornell.edu 102214024Sgabeblack@google.com sysinfo.copyOut(tc->getVirtProxy()); 10236640Svince@csl.cornell.edu 10246701Sgblack@eecs.umich.edu return 0; 10256640Svince@csl.cornell.edu} 1026360SN/A 10271999SN/A/// Target chmod() handler. 10281999SN/Atemplate <class OS> 10291999SN/ASyscallReturn 103013995Sbrandon.potter@amd.comchmodFunc(SyscallDesc *desc, int callnum, ThreadContext *tc) 10311999SN/A{ 10321999SN/A std::string path; 103313995Sbrandon.potter@amd.com auto process = tc->getProcessPtr(); 10341999SN/A 10356701Sgblack@eecs.umich.edu int index = 0; 103614024Sgabeblack@google.com if (!tc->getVirtProxy().tryReadString(path, 10376701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 10381999SN/A return -EFAULT; 10396701Sgblack@eecs.umich.edu } 10401999SN/A 10416701Sgblack@eecs.umich.edu uint32_t mode = process->getSyscallArg(tc, index); 10421999SN/A mode_t hostMode = 0; 10431999SN/A 10441999SN/A // XXX translate mode flags via OS::something??? 10451999SN/A hostMode = mode; 10461999SN/A 104713883Sdavid.hashe@amd.com // Adjust path for cwd and redirection 104813883Sdavid.hashe@amd.com path = process->checkPathRedirect(path); 10493669Sbinkertn@umich.edu 10501999SN/A // do the chmod 10511999SN/A int result = chmod(path.c_str(), hostMode); 10521999SN/A if (result < 0) 10532218SN/A return -errno; 10541999SN/A 10551999SN/A return 0; 10561999SN/A} 10571999SN/A 105813570Sbrandon.potter@amd.comtemplate <class OS> 105913570Sbrandon.potter@amd.comSyscallReturn 106013995Sbrandon.potter@amd.compollFunc(SyscallDesc *desc, int num, ThreadContext *tc) 106113570Sbrandon.potter@amd.com{ 106213570Sbrandon.potter@amd.com int index = 0; 106313995Sbrandon.potter@amd.com auto p = tc->getProcessPtr(); 106413570Sbrandon.potter@amd.com Addr fdsPtr = p->getSyscallArg(tc, index); 106513570Sbrandon.potter@amd.com int nfds = p->getSyscallArg(tc, index); 106613570Sbrandon.potter@amd.com int tmout = p->getSyscallArg(tc, index); 106713570Sbrandon.potter@amd.com 106813570Sbrandon.potter@amd.com BufferArg fdsBuf(fdsPtr, sizeof(struct pollfd) * nfds); 106914024Sgabeblack@google.com fdsBuf.copyIn(tc->getVirtProxy()); 107013570Sbrandon.potter@amd.com 107113570Sbrandon.potter@amd.com /** 107213570Sbrandon.potter@amd.com * Record the target file descriptors in a local variable. We need to 107313570Sbrandon.potter@amd.com * replace them with host file descriptors but we need a temporary copy 107413570Sbrandon.potter@amd.com * for later. Afterwards, replace each target file descriptor in the 107513570Sbrandon.potter@amd.com * poll_fd array with its host_fd. 107613570Sbrandon.potter@amd.com */ 107713570Sbrandon.potter@amd.com int temp_tgt_fds[nfds]; 107813570Sbrandon.potter@amd.com for (index = 0; index < nfds; index++) { 107913570Sbrandon.potter@amd.com temp_tgt_fds[index] = ((struct pollfd *)fdsBuf.bufferPtr())[index].fd; 108013570Sbrandon.potter@amd.com auto tgt_fd = temp_tgt_fds[index]; 108113570Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 108213570Sbrandon.potter@amd.com if (!hbfdp) 108313570Sbrandon.potter@amd.com return -EBADF; 108413570Sbrandon.potter@amd.com auto host_fd = hbfdp->getSimFD(); 108513570Sbrandon.potter@amd.com ((struct pollfd *)fdsBuf.bufferPtr())[index].fd = host_fd; 108613570Sbrandon.potter@amd.com } 108713570Sbrandon.potter@amd.com 108813570Sbrandon.potter@amd.com /** 108913570Sbrandon.potter@amd.com * We cannot allow an infinite poll to occur or it will inevitably cause 109013570Sbrandon.potter@amd.com * a deadlock in the gem5 simulator with clone. We must pass in tmout with 109113570Sbrandon.potter@amd.com * a non-negative value, however it also makes no sense to poll on the 109213570Sbrandon.potter@amd.com * underlying host for any other time than tmout a zero timeout. 109313570Sbrandon.potter@amd.com */ 109413570Sbrandon.potter@amd.com int status; 109513570Sbrandon.potter@amd.com if (tmout < 0) { 109613570Sbrandon.potter@amd.com status = poll((struct pollfd *)fdsBuf.bufferPtr(), nfds, 0); 109713570Sbrandon.potter@amd.com if (status == 0) { 109813570Sbrandon.potter@amd.com /** 109913570Sbrandon.potter@amd.com * If blocking indefinitely, check the signal list to see if a 110013570Sbrandon.potter@amd.com * signal would break the poll out of the retry cycle and try 110113570Sbrandon.potter@amd.com * to return the signal interrupt instead. 110213570Sbrandon.potter@amd.com */ 110313570Sbrandon.potter@amd.com System *sysh = tc->getSystemPtr(); 110413570Sbrandon.potter@amd.com std::list<BasicSignal>::iterator it; 110513570Sbrandon.potter@amd.com for (it=sysh->signalList.begin(); it!=sysh->signalList.end(); it++) 110613570Sbrandon.potter@amd.com if (it->receiver == p) 110713570Sbrandon.potter@amd.com return -EINTR; 110813570Sbrandon.potter@amd.com return SyscallReturn::retry(); 110913570Sbrandon.potter@amd.com } 111013570Sbrandon.potter@amd.com } else 111113570Sbrandon.potter@amd.com status = poll((struct pollfd *)fdsBuf.bufferPtr(), nfds, 0); 111213570Sbrandon.potter@amd.com 111313570Sbrandon.potter@amd.com if (status == -1) 111413570Sbrandon.potter@amd.com return -errno; 111513570Sbrandon.potter@amd.com 111613570Sbrandon.potter@amd.com /** 111713570Sbrandon.potter@amd.com * Replace each host_fd in the returned poll_fd array with its original 111813570Sbrandon.potter@amd.com * target file descriptor. 111913570Sbrandon.potter@amd.com */ 112013570Sbrandon.potter@amd.com for (index = 0; index < nfds; index++) { 112113570Sbrandon.potter@amd.com auto tgt_fd = temp_tgt_fds[index]; 112213570Sbrandon.potter@amd.com ((struct pollfd *)fdsBuf.bufferPtr())[index].fd = tgt_fd; 112313570Sbrandon.potter@amd.com } 112413570Sbrandon.potter@amd.com 112513570Sbrandon.potter@amd.com /** 112613570Sbrandon.potter@amd.com * Copy out the pollfd struct because the host may have updated fields 112713570Sbrandon.potter@amd.com * in the structure. 112813570Sbrandon.potter@amd.com */ 112914024Sgabeblack@google.com fdsBuf.copyOut(tc->getVirtProxy()); 113013570Sbrandon.potter@amd.com 113113570Sbrandon.potter@amd.com return status; 113213570Sbrandon.potter@amd.com} 11331999SN/A 11341999SN/A/// Target fchmod() handler. 11351999SN/Atemplate <class OS> 11361999SN/ASyscallReturn 113713995Sbrandon.potter@amd.comfchmodFunc(SyscallDesc *desc, int callnum, ThreadContext *tc) 11381999SN/A{ 11396701Sgblack@eecs.umich.edu int index = 0; 114013995Sbrandon.potter@amd.com auto p = tc->getProcessPtr(); 114111856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 114211856Sbrandon.potter@amd.com uint32_t mode = p->getSyscallArg(tc, index); 114310931Sbrandon.potter@amd.com 114411856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 114511856Sbrandon.potter@amd.com if (!ffdp) 11461999SN/A return -EBADF; 114711856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 11481999SN/A 114911856Sbrandon.potter@amd.com mode_t hostMode = mode; 11501999SN/A 115111856Sbrandon.potter@amd.com int result = fchmod(sim_fd, hostMode); 11521999SN/A 115311856Sbrandon.potter@amd.com return (result < 0) ? -errno : 0; 11541999SN/A} 11551999SN/A 11565877Shsul@eecs.umich.edu/// Target mremap() handler. 11575877Shsul@eecs.umich.edutemplate <class OS> 11585877Shsul@eecs.umich.eduSyscallReturn 115913995Sbrandon.potter@amd.commremapFunc(SyscallDesc *desc, int callnum, ThreadContext *tc) 11605877Shsul@eecs.umich.edu{ 11616701Sgblack@eecs.umich.edu int index = 0; 116213995Sbrandon.potter@amd.com auto process = tc->getProcessPtr(); 11636701Sgblack@eecs.umich.edu Addr start = process->getSyscallArg(tc, index); 11646701Sgblack@eecs.umich.edu uint64_t old_length = process->getSyscallArg(tc, index); 11656701Sgblack@eecs.umich.edu uint64_t new_length = process->getSyscallArg(tc, index); 11666701Sgblack@eecs.umich.edu uint64_t flags = process->getSyscallArg(tc, index); 116710027SChris.Adeniyi-Jones@arm.com uint64_t provided_address = 0; 116810027SChris.Adeniyi-Jones@arm.com bool use_provided_address = flags & OS::TGT_MREMAP_FIXED; 116910027SChris.Adeniyi-Jones@arm.com 117010027SChris.Adeniyi-Jones@arm.com if (use_provided_address) 117110027SChris.Adeniyi-Jones@arm.com provided_address = process->getSyscallArg(tc, index); 11725877Shsul@eecs.umich.edu 117310318Sandreas.hansson@arm.com if ((start % TheISA::PageBytes != 0) || 117410318Sandreas.hansson@arm.com (provided_address % TheISA::PageBytes != 0)) { 11755877Shsul@eecs.umich.edu warn("mremap failing: arguments not page aligned"); 11765877Shsul@eecs.umich.edu return -EINVAL; 11775877Shsul@eecs.umich.edu } 11785877Shsul@eecs.umich.edu 117910486Stjablin@gmail.com new_length = roundUp(new_length, TheISA::PageBytes); 118010486Stjablin@gmail.com 11815877Shsul@eecs.umich.edu if (new_length > old_length) { 118211905SBrandon.Potter@amd.com std::shared_ptr<MemState> mem_state = process->memState; 118311905SBrandon.Potter@amd.com Addr mmap_end = mem_state->getMmapEnd(); 118411905SBrandon.Potter@amd.com 118511905SBrandon.Potter@amd.com if ((start + old_length) == mmap_end && 118610027SChris.Adeniyi-Jones@arm.com (!use_provided_address || provided_address == start)) { 118712206Srico.amslinger@informatik.uni-augsburg.de // This case cannot occur when growing downward, as 118812206Srico.amslinger@informatik.uni-augsburg.de // start is greater than or equal to mmap_end. 11895877Shsul@eecs.umich.edu uint64_t diff = new_length - old_length; 119011905SBrandon.Potter@amd.com process->allocateMem(mmap_end, diff); 119111905SBrandon.Potter@amd.com mem_state->setMmapEnd(mmap_end + diff); 11925877Shsul@eecs.umich.edu return start; 11935877Shsul@eecs.umich.edu } else { 119410027SChris.Adeniyi-Jones@arm.com if (!use_provided_address && !(flags & OS::TGT_MREMAP_MAYMOVE)) { 11955877Shsul@eecs.umich.edu warn("can't remap here and MREMAP_MAYMOVE flag not set\n"); 11965877Shsul@eecs.umich.edu return -ENOMEM; 11975877Shsul@eecs.umich.edu } else { 119812206Srico.amslinger@informatik.uni-augsburg.de uint64_t new_start = provided_address; 119912206Srico.amslinger@informatik.uni-augsburg.de if (!use_provided_address) { 120012206Srico.amslinger@informatik.uni-augsburg.de new_start = process->mmapGrowsDown() ? 120112206Srico.amslinger@informatik.uni-augsburg.de mmap_end - new_length : mmap_end; 120212206Srico.amslinger@informatik.uni-augsburg.de mmap_end = process->mmapGrowsDown() ? 120312206Srico.amslinger@informatik.uni-augsburg.de new_start : mmap_end + new_length; 120412206Srico.amslinger@informatik.uni-augsburg.de mem_state->setMmapEnd(mmap_end); 120512206Srico.amslinger@informatik.uni-augsburg.de } 120612206Srico.amslinger@informatik.uni-augsburg.de 120710027SChris.Adeniyi-Jones@arm.com process->pTable->remap(start, old_length, new_start); 120810027SChris.Adeniyi-Jones@arm.com warn("mremapping to new vaddr %08p-%08p, adding %d\n", 120910027SChris.Adeniyi-Jones@arm.com new_start, new_start + new_length, 121010027SChris.Adeniyi-Jones@arm.com new_length - old_length); 12115877Shsul@eecs.umich.edu // add on the remaining unallocated pages 121210027SChris.Adeniyi-Jones@arm.com process->allocateMem(new_start + old_length, 121310027SChris.Adeniyi-Jones@arm.com new_length - old_length, 121410027SChris.Adeniyi-Jones@arm.com use_provided_address /* clobber */); 121510027SChris.Adeniyi-Jones@arm.com if (use_provided_address && 121612206Srico.amslinger@informatik.uni-augsburg.de ((new_start + new_length > mem_state->getMmapEnd() && 121712206Srico.amslinger@informatik.uni-augsburg.de !process->mmapGrowsDown()) || 121812206Srico.amslinger@informatik.uni-augsburg.de (new_start < mem_state->getMmapEnd() && 121912206Srico.amslinger@informatik.uni-augsburg.de process->mmapGrowsDown()))) { 122010027SChris.Adeniyi-Jones@arm.com // something fishy going on here, at least notify the user 122110027SChris.Adeniyi-Jones@arm.com // @todo: increase mmap_end? 122210027SChris.Adeniyi-Jones@arm.com warn("mmap region limit exceeded with MREMAP_FIXED\n"); 122310027SChris.Adeniyi-Jones@arm.com } 122410027SChris.Adeniyi-Jones@arm.com warn("returning %08p as start\n", new_start); 122510027SChris.Adeniyi-Jones@arm.com return new_start; 12265877Shsul@eecs.umich.edu } 12275877Shsul@eecs.umich.edu } 12285877Shsul@eecs.umich.edu } else { 122910027SChris.Adeniyi-Jones@arm.com if (use_provided_address && provided_address != start) 123010027SChris.Adeniyi-Jones@arm.com process->pTable->remap(start, new_length, provided_address); 12318601Ssteve.reinhardt@amd.com process->pTable->unmap(start + new_length, old_length - new_length); 123210027SChris.Adeniyi-Jones@arm.com return use_provided_address ? provided_address : start; 12335877Shsul@eecs.umich.edu } 12345877Shsul@eecs.umich.edu} 12351999SN/A 1236378SN/A/// Target stat() handler. 1237360SN/Atemplate <class OS> 12381450SN/ASyscallReturn 123913995Sbrandon.potter@amd.comstatFunc(SyscallDesc *desc, int callnum, ThreadContext *tc) 1240360SN/A{ 1241360SN/A std::string path; 124213995Sbrandon.potter@amd.com auto process = tc->getProcessPtr(); 1243360SN/A 12446701Sgblack@eecs.umich.edu int index = 0; 124514024Sgabeblack@google.com if (!tc->getVirtProxy().tryReadString(path, 12466701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 12476701Sgblack@eecs.umich.edu return -EFAULT; 12486701Sgblack@eecs.umich.edu } 12496701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 1250360SN/A 125113883Sdavid.hashe@amd.com // Adjust path for cwd and redirection 125213883Sdavid.hashe@amd.com path = process->checkPathRedirect(path); 12533669Sbinkertn@umich.edu 1254360SN/A struct stat hostBuf; 1255360SN/A int result = stat(path.c_str(), &hostBuf); 1256360SN/A 1257360SN/A if (result < 0) 12582218SN/A return -errno; 1259360SN/A 126014024Sgabeblack@google.com copyOutStatBuf<OS>(tc->getVirtProxy(), bufPtr, &hostBuf); 1261360SN/A 12621458SN/A return 0; 1263360SN/A} 1264360SN/A 1265360SN/A 12665074Ssaidi@eecs.umich.edu/// Target stat64() handler. 12675074Ssaidi@eecs.umich.edutemplate <class OS> 12685074Ssaidi@eecs.umich.eduSyscallReturn 126913995Sbrandon.potter@amd.comstat64Func(SyscallDesc *desc, int callnum, ThreadContext *tc) 12705074Ssaidi@eecs.umich.edu{ 12715074Ssaidi@eecs.umich.edu std::string path; 127213995Sbrandon.potter@amd.com auto process = tc->getProcessPtr(); 12735074Ssaidi@eecs.umich.edu 12746701Sgblack@eecs.umich.edu int index = 0; 127514024Sgabeblack@google.com if (!tc->getVirtProxy().tryReadString(path, 12766701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) 12775074Ssaidi@eecs.umich.edu return -EFAULT; 12786701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 12795074Ssaidi@eecs.umich.edu 128013883Sdavid.hashe@amd.com // Adjust path for cwd and redirection 128113883Sdavid.hashe@amd.com path = process->checkPathRedirect(path); 12825074Ssaidi@eecs.umich.edu 12835208Ssaidi@eecs.umich.edu#if NO_STAT64 12845208Ssaidi@eecs.umich.edu struct stat hostBuf; 12855208Ssaidi@eecs.umich.edu int result = stat(path.c_str(), &hostBuf); 12865208Ssaidi@eecs.umich.edu#else 12875074Ssaidi@eecs.umich.edu struct stat64 hostBuf; 12885074Ssaidi@eecs.umich.edu int result = stat64(path.c_str(), &hostBuf); 12895208Ssaidi@eecs.umich.edu#endif 12905074Ssaidi@eecs.umich.edu 12915074Ssaidi@eecs.umich.edu if (result < 0) 12925074Ssaidi@eecs.umich.edu return -errno; 12935074Ssaidi@eecs.umich.edu 129414024Sgabeblack@google.com copyOutStat64Buf<OS>(tc->getVirtProxy(), bufPtr, &hostBuf); 12955074Ssaidi@eecs.umich.edu 12965074Ssaidi@eecs.umich.edu return 0; 12975074Ssaidi@eecs.umich.edu} 12985074Ssaidi@eecs.umich.edu 12995074Ssaidi@eecs.umich.edu 130010027SChris.Adeniyi-Jones@arm.com/// Target fstatat64() handler. 130110027SChris.Adeniyi-Jones@arm.comtemplate <class OS> 130210027SChris.Adeniyi-Jones@arm.comSyscallReturn 130313995Sbrandon.potter@amd.comfstatat64Func(SyscallDesc *desc, int callnum, ThreadContext *tc) 130410027SChris.Adeniyi-Jones@arm.com{ 130510027SChris.Adeniyi-Jones@arm.com int index = 0; 130613995Sbrandon.potter@amd.com auto process = tc->getProcessPtr(); 130710027SChris.Adeniyi-Jones@arm.com int dirfd = process->getSyscallArg(tc, index); 130810027SChris.Adeniyi-Jones@arm.com if (dirfd != OS::TGT_AT_FDCWD) 130910793Sbrandon.potter@amd.com warn("fstatat64: first argument not AT_FDCWD; unlikely to work"); 131010027SChris.Adeniyi-Jones@arm.com 131110027SChris.Adeniyi-Jones@arm.com std::string path; 131214024Sgabeblack@google.com if (!tc->getVirtProxy().tryReadString(path, 131310027SChris.Adeniyi-Jones@arm.com process->getSyscallArg(tc, index))) 131410027SChris.Adeniyi-Jones@arm.com return -EFAULT; 131510027SChris.Adeniyi-Jones@arm.com Addr bufPtr = process->getSyscallArg(tc, index); 131610027SChris.Adeniyi-Jones@arm.com 131713883Sdavid.hashe@amd.com // Adjust path for cwd and redirection 131813883Sdavid.hashe@amd.com path = process->checkPathRedirect(path); 131910027SChris.Adeniyi-Jones@arm.com 132010027SChris.Adeniyi-Jones@arm.com#if NO_STAT64 132110027SChris.Adeniyi-Jones@arm.com struct stat hostBuf; 132210027SChris.Adeniyi-Jones@arm.com int result = stat(path.c_str(), &hostBuf); 132310027SChris.Adeniyi-Jones@arm.com#else 132410027SChris.Adeniyi-Jones@arm.com struct stat64 hostBuf; 132510027SChris.Adeniyi-Jones@arm.com int result = stat64(path.c_str(), &hostBuf); 132610027SChris.Adeniyi-Jones@arm.com#endif 132710027SChris.Adeniyi-Jones@arm.com 132810027SChris.Adeniyi-Jones@arm.com if (result < 0) 132910027SChris.Adeniyi-Jones@arm.com return -errno; 133010027SChris.Adeniyi-Jones@arm.com 133114024Sgabeblack@google.com copyOutStat64Buf<OS>(tc->getVirtProxy(), bufPtr, &hostBuf); 133210027SChris.Adeniyi-Jones@arm.com 133310027SChris.Adeniyi-Jones@arm.com return 0; 133410027SChris.Adeniyi-Jones@arm.com} 133510027SChris.Adeniyi-Jones@arm.com 133610027SChris.Adeniyi-Jones@arm.com 13371999SN/A/// Target fstat64() handler. 13381999SN/Atemplate <class OS> 13391999SN/ASyscallReturn 134013995Sbrandon.potter@amd.comfstat64Func(SyscallDesc *desc, int callnum, ThreadContext *tc) 13411999SN/A{ 13426701Sgblack@eecs.umich.edu int index = 0; 134313995Sbrandon.potter@amd.com auto p = tc->getProcessPtr(); 134411856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 134511856Sbrandon.potter@amd.com Addr bufPtr = p->getSyscallArg(tc, index); 134610931Sbrandon.potter@amd.com 134714120Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 134811856Sbrandon.potter@amd.com if (!ffdp) 13491999SN/A return -EBADF; 135011856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 13511999SN/A 13522764Sstever@eecs.umich.edu#if NO_STAT64 13532064SN/A struct stat hostBuf; 135410931Sbrandon.potter@amd.com int result = fstat(sim_fd, &hostBuf); 13552064SN/A#else 13562064SN/A struct stat64 hostBuf; 135710931Sbrandon.potter@amd.com int result = fstat64(sim_fd, &hostBuf); 13582064SN/A#endif 13591999SN/A 13601999SN/A if (result < 0) 13612218SN/A return -errno; 13621999SN/A 136314024Sgabeblack@google.com copyOutStat64Buf<OS>(tc->getVirtProxy(), bufPtr, &hostBuf, (sim_fd == 1)); 13641999SN/A 13651999SN/A return 0; 13661999SN/A} 13671999SN/A 13681999SN/A 1369378SN/A/// Target lstat() handler. 1370360SN/Atemplate <class OS> 13711450SN/ASyscallReturn 137213995Sbrandon.potter@amd.comlstatFunc(SyscallDesc *desc, int callnum, ThreadContext *tc) 1373360SN/A{ 1374360SN/A std::string path; 137513995Sbrandon.potter@amd.com auto process = tc->getProcessPtr(); 1376360SN/A 13776701Sgblack@eecs.umich.edu int index = 0; 137814024Sgabeblack@google.com if (!tc->getVirtProxy().tryReadString(path, 13796701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 13806701Sgblack@eecs.umich.edu return -EFAULT; 13816701Sgblack@eecs.umich.edu } 13826701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 1383360SN/A 138413883Sdavid.hashe@amd.com // Adjust path for cwd and redirection 138513883Sdavid.hashe@amd.com path = process->checkPathRedirect(path); 13863669Sbinkertn@umich.edu 1387360SN/A struct stat hostBuf; 1388360SN/A int result = lstat(path.c_str(), &hostBuf); 1389360SN/A 1390360SN/A if (result < 0) 13911458SN/A return -errno; 1392360SN/A 139314024Sgabeblack@google.com copyOutStatBuf<OS>(tc->getVirtProxy(), bufPtr, &hostBuf); 1394360SN/A 13951458SN/A return 0; 1396360SN/A} 1397360SN/A 13981999SN/A/// Target lstat64() handler. 13991999SN/Atemplate <class OS> 14001999SN/ASyscallReturn 140113995Sbrandon.potter@amd.comlstat64Func(SyscallDesc *desc, int callnum, ThreadContext *tc) 14021999SN/A{ 14031999SN/A std::string path; 140413995Sbrandon.potter@amd.com auto process = tc->getProcessPtr(); 14051999SN/A 14066701Sgblack@eecs.umich.edu int index = 0; 140714024Sgabeblack@google.com if (!tc->getVirtProxy().tryReadString(path, 14086701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 14096701Sgblack@eecs.umich.edu return -EFAULT; 14106701Sgblack@eecs.umich.edu } 14116701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 14121999SN/A 141313883Sdavid.hashe@amd.com // Adjust path for cwd and redirection 141413883Sdavid.hashe@amd.com path = process->checkPathRedirect(path); 14153669Sbinkertn@umich.edu 14162764Sstever@eecs.umich.edu#if NO_STAT64 14172064SN/A struct stat hostBuf; 14182064SN/A int result = lstat(path.c_str(), &hostBuf); 14192064SN/A#else 14201999SN/A struct stat64 hostBuf; 14211999SN/A int result = lstat64(path.c_str(), &hostBuf); 14222064SN/A#endif 14231999SN/A 14241999SN/A if (result < 0) 14251999SN/A return -errno; 14261999SN/A 142714024Sgabeblack@google.com copyOutStat64Buf<OS>(tc->getVirtProxy(), bufPtr, &hostBuf); 14281999SN/A 14291999SN/A return 0; 14301999SN/A} 14311999SN/A 1432378SN/A/// Target fstat() handler. 1433360SN/Atemplate <class OS> 14341450SN/ASyscallReturn 143513995Sbrandon.potter@amd.comfstatFunc(SyscallDesc *desc, int callnum, ThreadContext *tc) 1436360SN/A{ 14376701Sgblack@eecs.umich.edu int index = 0; 143813995Sbrandon.potter@amd.com auto p = tc->getProcessPtr(); 143911856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 144011856Sbrandon.potter@amd.com Addr bufPtr = p->getSyscallArg(tc, index); 1441360SN/A 144211380Salexandru.dutu@amd.com DPRINTF_SYSCALL(Verbose, "fstat(%d, ...)\n", tgt_fd); 1443360SN/A 144411856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 144511856Sbrandon.potter@amd.com if (!ffdp) 14461458SN/A return -EBADF; 144711856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 1448360SN/A 1449360SN/A struct stat hostBuf; 145010931Sbrandon.potter@amd.com int result = fstat(sim_fd, &hostBuf); 1451360SN/A 1452360SN/A if (result < 0) 14531458SN/A return -errno; 1454360SN/A 145514024Sgabeblack@google.com copyOutStatBuf<OS>(tc->getVirtProxy(), bufPtr, &hostBuf, (sim_fd == 1)); 14562021SN/A 14571458SN/A return 0; 1458360SN/A} 1459360SN/A 14601706SN/A/// Target statfs() handler. 14611706SN/Atemplate <class OS> 14621706SN/ASyscallReturn 146313995Sbrandon.potter@amd.comstatfsFunc(SyscallDesc *desc, int callnum, ThreadContext *tc) 14641706SN/A{ 146513936SAndrea.Mondelli@ucf.edu#if defined(__linux__) 14661706SN/A std::string path; 146713995Sbrandon.potter@amd.com auto process = tc->getProcessPtr(); 14681706SN/A 14696701Sgblack@eecs.umich.edu int index = 0; 147014024Sgabeblack@google.com if (!tc->getVirtProxy().tryReadString(path, 14716701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 14726701Sgblack@eecs.umich.edu return -EFAULT; 14736701Sgblack@eecs.umich.edu } 14746701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 14751706SN/A 147613883Sdavid.hashe@amd.com // Adjust path for cwd and redirection 147713883Sdavid.hashe@amd.com path = process->checkPathRedirect(path); 14783669Sbinkertn@umich.edu 14791706SN/A struct statfs hostBuf; 14801706SN/A int result = statfs(path.c_str(), &hostBuf); 14811706SN/A 14821706SN/A if (result < 0) 14832218SN/A return -errno; 14841706SN/A 148514024Sgabeblack@google.com copyOutStatfsBuf<OS>(tc->getVirtProxy(), bufPtr, &hostBuf); 148613933Sbrandon.potter@amd.com return 0; 148713933Sbrandon.potter@amd.com#else 148813933Sbrandon.potter@amd.com warnUnsupportedOS("statfs"); 148913933Sbrandon.potter@amd.com return -1; 149011799Sbrandon.potter@amd.com#endif 14911706SN/A} 14921706SN/A 149311886Sbrandon.potter@amd.comtemplate <class OS> 149411886Sbrandon.potter@amd.comSyscallReturn 149513995Sbrandon.potter@amd.comcloneFunc(SyscallDesc *desc, int callnum, ThreadContext *tc) 149611886Sbrandon.potter@amd.com{ 149711886Sbrandon.potter@amd.com int index = 0; 149812426Sqtt2@cornell.edu 149913995Sbrandon.potter@amd.com auto p = tc->getProcessPtr(); 150013557Sgabeblack@google.com RegVal flags = p->getSyscallArg(tc, index); 150113557Sgabeblack@google.com RegVal newStack = p->getSyscallArg(tc, index); 150211886Sbrandon.potter@amd.com Addr ptidPtr = p->getSyscallArg(tc, index); 150312426Sqtt2@cornell.edu 150413534Sandreas.sandberg@arm.com#if THE_ISA == RISCV_ISA or THE_ISA == ARM_ISA 150512426Sqtt2@cornell.edu /** 150613534Sandreas.sandberg@arm.com * Linux sets CLONE_BACKWARDS flag for RISC-V and Arm. 150712426Sqtt2@cornell.edu * The flag defines the list of clone() arguments in the following 150812426Sqtt2@cornell.edu * order: flags -> newStack -> ptidPtr -> tlsPtr -> ctidPtr 150912426Sqtt2@cornell.edu */ 151013536Sandreas.sandberg@arm.com Addr tlsPtr = p->getSyscallArg(tc, index); 151112426Sqtt2@cornell.edu Addr ctidPtr = p->getSyscallArg(tc, index); 151212426Sqtt2@cornell.edu#else 151311886Sbrandon.potter@amd.com Addr ctidPtr = p->getSyscallArg(tc, index); 151413536Sandreas.sandberg@arm.com Addr tlsPtr = p->getSyscallArg(tc, index); 151512426Sqtt2@cornell.edu#endif 151611886Sbrandon.potter@amd.com 151711886Sbrandon.potter@amd.com if (((flags & OS::TGT_CLONE_SIGHAND)&& !(flags & OS::TGT_CLONE_VM)) || 151811886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_THREAD) && !(flags & OS::TGT_CLONE_SIGHAND)) || 151911886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_FS) && (flags & OS::TGT_CLONE_NEWNS)) || 152011886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_NEWIPC) && (flags & OS::TGT_CLONE_SYSVSEM)) || 152111886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_NEWPID) && (flags & OS::TGT_CLONE_THREAD)) || 152211886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_VM) && !(newStack))) 152311886Sbrandon.potter@amd.com return -EINVAL; 152411886Sbrandon.potter@amd.com 152511886Sbrandon.potter@amd.com ThreadContext *ctc; 152613649Sqtt2@cornell.edu if (!(ctc = p->findFreeContext())) { 152713649Sqtt2@cornell.edu DPRINTF_SYSCALL(Verbose, "clone: no spare thread context in system" 152813649Sqtt2@cornell.edu "[cpu %d, thread %d]", tc->cpuId(), tc->threadId()); 152913649Sqtt2@cornell.edu return -EAGAIN; 153013649Sqtt2@cornell.edu } 153111886Sbrandon.potter@amd.com 153211886Sbrandon.potter@amd.com /** 153311886Sbrandon.potter@amd.com * Note that ProcessParams is generated by swig and there are no other 153411886Sbrandon.potter@amd.com * examples of how to create anything but this default constructor. The 153511886Sbrandon.potter@amd.com * fields are manually initialized instead of passing parameters to the 153611886Sbrandon.potter@amd.com * constructor. 153711886Sbrandon.potter@amd.com */ 153811886Sbrandon.potter@amd.com ProcessParams *pp = new ProcessParams(); 153911886Sbrandon.potter@amd.com pp->executable.assign(*(new std::string(p->progName()))); 154011886Sbrandon.potter@amd.com pp->cmd.push_back(*(new std::string(p->progName()))); 154111886Sbrandon.potter@amd.com pp->system = p->system; 154213883Sdavid.hashe@amd.com pp->cwd.assign(p->tgtCwd); 154311886Sbrandon.potter@amd.com pp->input.assign("stdin"); 154411886Sbrandon.potter@amd.com pp->output.assign("stdout"); 154511886Sbrandon.potter@amd.com pp->errout.assign("stderr"); 154611886Sbrandon.potter@amd.com pp->uid = p->uid(); 154711886Sbrandon.potter@amd.com pp->euid = p->euid(); 154811886Sbrandon.potter@amd.com pp->gid = p->gid(); 154911886Sbrandon.potter@amd.com pp->egid = p->egid(); 155011886Sbrandon.potter@amd.com 155111886Sbrandon.potter@amd.com /* Find the first free PID that's less than the maximum */ 155211886Sbrandon.potter@amd.com std::set<int> const& pids = p->system->PIDs; 155311886Sbrandon.potter@amd.com int temp_pid = *pids.begin(); 155411886Sbrandon.potter@amd.com do { 155511886Sbrandon.potter@amd.com temp_pid++; 155611886Sbrandon.potter@amd.com } while (pids.find(temp_pid) != pids.end()); 155711886Sbrandon.potter@amd.com if (temp_pid >= System::maxPID) 155811886Sbrandon.potter@amd.com fatal("temp_pid is too large: %d", temp_pid); 155911886Sbrandon.potter@amd.com 156011886Sbrandon.potter@amd.com pp->pid = temp_pid; 156111886Sbrandon.potter@amd.com pp->ppid = (flags & OS::TGT_CLONE_THREAD) ? p->ppid() : p->pid(); 156213867Salexandru.dutu@amd.com pp->useArchPT = p->useArchPT; 156313867Salexandru.dutu@amd.com pp->kvmInSE = p->kvmInSE; 156411886Sbrandon.potter@amd.com Process *cp = pp->create(); 156511886Sbrandon.potter@amd.com delete pp; 156611886Sbrandon.potter@amd.com 156711886Sbrandon.potter@amd.com Process *owner = ctc->getProcessPtr(); 156811886Sbrandon.potter@amd.com ctc->setProcessPtr(cp); 156911886Sbrandon.potter@amd.com cp->assignThreadContext(ctc->contextId()); 157011886Sbrandon.potter@amd.com owner->revokeThreadContext(ctc->contextId()); 157111886Sbrandon.potter@amd.com 157211886Sbrandon.potter@amd.com if (flags & OS::TGT_CLONE_PARENT_SETTID) { 157311886Sbrandon.potter@amd.com BufferArg ptidBuf(ptidPtr, sizeof(long)); 157411886Sbrandon.potter@amd.com long *ptid = (long *)ptidBuf.bufferPtr(); 157511886Sbrandon.potter@amd.com *ptid = cp->pid(); 157614024Sgabeblack@google.com ptidBuf.copyOut(tc->getVirtProxy()); 157711886Sbrandon.potter@amd.com } 157811886Sbrandon.potter@amd.com 157913867Salexandru.dutu@amd.com if (flags & OS::TGT_CLONE_THREAD) { 158013867Salexandru.dutu@amd.com cp->pTable->shared = true; 158113867Salexandru.dutu@amd.com cp->useForClone = true; 158213867Salexandru.dutu@amd.com } 158311886Sbrandon.potter@amd.com cp->initState(); 158411886Sbrandon.potter@amd.com p->clone(tc, ctc, cp, flags); 158511886Sbrandon.potter@amd.com 158611911SBrandon.Potter@amd.com if (flags & OS::TGT_CLONE_THREAD) { 158711911SBrandon.Potter@amd.com delete cp->sigchld; 158811911SBrandon.Potter@amd.com cp->sigchld = p->sigchld; 158911911SBrandon.Potter@amd.com } else if (flags & OS::TGT_SIGCHLD) { 159011911SBrandon.Potter@amd.com *cp->sigchld = true; 159111911SBrandon.Potter@amd.com } 159211911SBrandon.Potter@amd.com 159311886Sbrandon.potter@amd.com if (flags & OS::TGT_CLONE_CHILD_SETTID) { 159411886Sbrandon.potter@amd.com BufferArg ctidBuf(ctidPtr, sizeof(long)); 159511886Sbrandon.potter@amd.com long *ctid = (long *)ctidBuf.bufferPtr(); 159611886Sbrandon.potter@amd.com *ctid = cp->pid(); 159714024Sgabeblack@google.com ctidBuf.copyOut(ctc->getVirtProxy()); 159811886Sbrandon.potter@amd.com } 159911886Sbrandon.potter@amd.com 160011886Sbrandon.potter@amd.com if (flags & OS::TGT_CLONE_CHILD_CLEARTID) 160111886Sbrandon.potter@amd.com cp->childClearTID = (uint64_t)ctidPtr; 160211886Sbrandon.potter@amd.com 160311886Sbrandon.potter@amd.com ctc->clearArchRegs(); 160411886Sbrandon.potter@amd.com 160513536Sandreas.sandberg@arm.com OS::archClone(flags, p, cp, tc, ctc, newStack, tlsPtr); 160611886Sbrandon.potter@amd.com 160711886Sbrandon.potter@amd.com cp->setSyscallReturn(ctc, 0); 160811886Sbrandon.potter@amd.com 160911886Sbrandon.potter@amd.com#if THE_ISA == ALPHA_ISA 161011886Sbrandon.potter@amd.com ctc->setIntReg(TheISA::SyscallSuccessReg, 0); 161111886Sbrandon.potter@amd.com#elif THE_ISA == SPARC_ISA 161211886Sbrandon.potter@amd.com tc->setIntReg(TheISA::SyscallPseudoReturnReg, 0); 161311886Sbrandon.potter@amd.com ctc->setIntReg(TheISA::SyscallPseudoReturnReg, 1); 161411886Sbrandon.potter@amd.com#endif 161511886Sbrandon.potter@amd.com 161613867Salexandru.dutu@amd.com if (p->kvmInSE) { 161713867Salexandru.dutu@amd.com#if THE_ISA == X86_ISA 161813867Salexandru.dutu@amd.com ctc->pcState(tc->readIntReg(TheISA::INTREG_RCX)); 161913867Salexandru.dutu@amd.com#else 162013867Salexandru.dutu@amd.com panic("KVM CPU model is not supported for this ISA"); 162113867Salexandru.dutu@amd.com#endif 162213867Salexandru.dutu@amd.com } else { 162313867Salexandru.dutu@amd.com TheISA::PCState cpc = tc->pcState(); 162413867Salexandru.dutu@amd.com cpc.advance(); 162513867Salexandru.dutu@amd.com ctc->pcState(cpc); 162613867Salexandru.dutu@amd.com } 162711886Sbrandon.potter@amd.com ctc->activate(); 162811886Sbrandon.potter@amd.com 162911886Sbrandon.potter@amd.com return cp->pid(); 163011886Sbrandon.potter@amd.com} 16311706SN/A 16321706SN/A/// Target fstatfs() handler. 16331706SN/Atemplate <class OS> 16341706SN/ASyscallReturn 163513995Sbrandon.potter@amd.comfstatfsFunc(SyscallDesc *desc, int callnum, ThreadContext *tc) 16361706SN/A{ 16376701Sgblack@eecs.umich.edu int index = 0; 163813995Sbrandon.potter@amd.com auto p = tc->getProcessPtr(); 163911856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 164011856Sbrandon.potter@amd.com Addr bufPtr = p->getSyscallArg(tc, index); 16411706SN/A 164211856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 164311856Sbrandon.potter@amd.com if (!ffdp) 16441706SN/A return -EBADF; 164511856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 16461706SN/A 16471706SN/A struct statfs hostBuf; 164810931Sbrandon.potter@amd.com int result = fstatfs(sim_fd, &hostBuf); 16491706SN/A 16501706SN/A if (result < 0) 16512218SN/A return -errno; 16521706SN/A 165314024Sgabeblack@google.com copyOutStatfsBuf<OS>(tc->getVirtProxy(), bufPtr, &hostBuf); 16541706SN/A 16551706SN/A return 0; 16561706SN/A} 16571706SN/A 165813572Sbrandon.potter@amd.com/// Target readv() handler. 165913572Sbrandon.potter@amd.comtemplate <class OS> 166013572Sbrandon.potter@amd.comSyscallReturn 166113995Sbrandon.potter@amd.comreadvFunc(SyscallDesc *desc, int callnum, ThreadContext *tc) 166213572Sbrandon.potter@amd.com{ 166313572Sbrandon.potter@amd.com int index = 0; 166413995Sbrandon.potter@amd.com auto p = tc->getProcessPtr(); 166513572Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 166613572Sbrandon.potter@amd.com 166713572Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 166813572Sbrandon.potter@amd.com if (!ffdp) 166913572Sbrandon.potter@amd.com return -EBADF; 167013572Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 167113572Sbrandon.potter@amd.com 167214024Sgabeblack@google.com PortProxy &prox = tc->getVirtProxy(); 167313572Sbrandon.potter@amd.com uint64_t tiov_base = p->getSyscallArg(tc, index); 167413572Sbrandon.potter@amd.com size_t count = p->getSyscallArg(tc, index); 167513572Sbrandon.potter@amd.com typename OS::tgt_iovec tiov[count]; 167613572Sbrandon.potter@amd.com struct iovec hiov[count]; 167713572Sbrandon.potter@amd.com for (size_t i = 0; i < count; ++i) { 167813572Sbrandon.potter@amd.com prox.readBlob(tiov_base + (i * sizeof(typename OS::tgt_iovec)), 167914010Sgabeblack@google.com &tiov[i], sizeof(typename OS::tgt_iovec)); 168013572Sbrandon.potter@amd.com hiov[i].iov_len = TheISA::gtoh(tiov[i].iov_len); 168113572Sbrandon.potter@amd.com hiov[i].iov_base = new char [hiov[i].iov_len]; 168213572Sbrandon.potter@amd.com } 168313572Sbrandon.potter@amd.com 168413572Sbrandon.potter@amd.com int result = readv(sim_fd, hiov, count); 168513572Sbrandon.potter@amd.com int local_errno = errno; 168613572Sbrandon.potter@amd.com 168713572Sbrandon.potter@amd.com for (size_t i = 0; i < count; ++i) { 168813572Sbrandon.potter@amd.com if (result != -1) { 168913572Sbrandon.potter@amd.com prox.writeBlob(TheISA::htog(tiov[i].iov_base), 169014010Sgabeblack@google.com hiov[i].iov_base, hiov[i].iov_len); 169113572Sbrandon.potter@amd.com } 169213572Sbrandon.potter@amd.com delete [] (char *)hiov[i].iov_base; 169313572Sbrandon.potter@amd.com } 169413572Sbrandon.potter@amd.com 169513572Sbrandon.potter@amd.com return (result == -1) ? -local_errno : result; 169613572Sbrandon.potter@amd.com} 16971706SN/A 16981999SN/A/// Target writev() handler. 16991999SN/Atemplate <class OS> 17001999SN/ASyscallReturn 170113995Sbrandon.potter@amd.comwritevFunc(SyscallDesc *desc, int callnum, ThreadContext *tc) 17021999SN/A{ 17036701Sgblack@eecs.umich.edu int index = 0; 170413995Sbrandon.potter@amd.com auto p = tc->getProcessPtr(); 170511856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 170610931Sbrandon.potter@amd.com 170711856Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 170811856Sbrandon.potter@amd.com if (!hbfdp) 17091999SN/A return -EBADF; 171011856Sbrandon.potter@amd.com int sim_fd = hbfdp->getSimFD(); 17111999SN/A 171214024Sgabeblack@google.com PortProxy &prox = tc->getVirtProxy(); 171311856Sbrandon.potter@amd.com uint64_t tiov_base = p->getSyscallArg(tc, index); 171411856Sbrandon.potter@amd.com size_t count = p->getSyscallArg(tc, index); 17151999SN/A struct iovec hiov[count]; 17166227Snate@binkert.org for (size_t i = 0; i < count; ++i) { 17171999SN/A typename OS::tgt_iovec tiov; 17182461SN/A 171911856Sbrandon.potter@amd.com prox.readBlob(tiov_base + i*sizeof(typename OS::tgt_iovec), 172014010Sgabeblack@google.com &tiov, sizeof(typename OS::tgt_iovec)); 17218737Skoansin.tan@gmail.com hiov[i].iov_len = TheISA::gtoh(tiov.iov_len); 17221999SN/A hiov[i].iov_base = new char [hiov[i].iov_len]; 172314010Sgabeblack@google.com prox.readBlob(TheISA::gtoh(tiov.iov_base), hiov[i].iov_base, 172411856Sbrandon.potter@amd.com hiov[i].iov_len); 17251999SN/A } 17261999SN/A 172710931Sbrandon.potter@amd.com int result = writev(sim_fd, hiov, count); 17281999SN/A 17296227Snate@binkert.org for (size_t i = 0; i < count; ++i) 17301999SN/A delete [] (char *)hiov[i].iov_base; 17311999SN/A 173213572Sbrandon.potter@amd.com return (result == -1) ? -errno : result; 17331999SN/A} 17341999SN/A 173511385Sbrandon.potter@amd.com/// Real mmap handler. 1736360SN/Atemplate <class OS> 17371450SN/ASyscallReturn 173813995Sbrandon.potter@amd.commmapImpl(SyscallDesc *desc, int num, ThreadContext *tc, bool is_mmap2) 1739360SN/A{ 17406701Sgblack@eecs.umich.edu int index = 0; 174113995Sbrandon.potter@amd.com auto p = tc->getProcessPtr(); 17426701Sgblack@eecs.umich.edu Addr start = p->getSyscallArg(tc, index); 17436701Sgblack@eecs.umich.edu uint64_t length = p->getSyscallArg(tc, index); 174411383Sbrandon.potter@amd.com int prot = p->getSyscallArg(tc, index); 174511383Sbrandon.potter@amd.com int tgt_flags = p->getSyscallArg(tc, index); 17468324Ssteve.reinhardt@amd.com int tgt_fd = p->getSyscallArg(tc, index); 174710486Stjablin@gmail.com int offset = p->getSyscallArg(tc, index); 1748360SN/A 174911385Sbrandon.potter@amd.com if (is_mmap2) 175011385Sbrandon.potter@amd.com offset *= TheISA::PageBytes; 17519008Sgblack@eecs.umich.edu 175211383Sbrandon.potter@amd.com if (start & (TheISA::PageBytes - 1) || 175311383Sbrandon.potter@amd.com offset & (TheISA::PageBytes - 1) || 175411383Sbrandon.potter@amd.com (tgt_flags & OS::TGT_MAP_PRIVATE && 175511383Sbrandon.potter@amd.com tgt_flags & OS::TGT_MAP_SHARED) || 175611383Sbrandon.potter@amd.com (!(tgt_flags & OS::TGT_MAP_PRIVATE) && 175711383Sbrandon.potter@amd.com !(tgt_flags & OS::TGT_MAP_SHARED)) || 175811383Sbrandon.potter@amd.com !length) { 175911383Sbrandon.potter@amd.com return -EINVAL; 176011383Sbrandon.potter@amd.com } 17618324Ssteve.reinhardt@amd.com 176211383Sbrandon.potter@amd.com if ((prot & PROT_WRITE) && (tgt_flags & OS::TGT_MAP_SHARED)) { 176311383Sbrandon.potter@amd.com // With shared mmaps, there are two cases to consider: 176411383Sbrandon.potter@amd.com // 1) anonymous: writes should modify the mapping and this should be 176511383Sbrandon.potter@amd.com // visible to observers who share the mapping. Currently, it's 176611383Sbrandon.potter@amd.com // difficult to update the shared mapping because there's no 176711383Sbrandon.potter@amd.com // structure which maintains information about the which virtual 176811383Sbrandon.potter@amd.com // memory areas are shared. If that structure existed, it would be 176911383Sbrandon.potter@amd.com // possible to make the translations point to the same frames. 177011383Sbrandon.potter@amd.com // 2) file-backed: writes should modify the mapping and the file 177111383Sbrandon.potter@amd.com // which is backed by the mapping. The shared mapping problem is the 177211383Sbrandon.potter@amd.com // same as what was mentioned about the anonymous mappings. For 177311383Sbrandon.potter@amd.com // file-backed mappings, the writes to the file are difficult 177411383Sbrandon.potter@amd.com // because it requires syncing what the mapping holds with the file 177511383Sbrandon.potter@amd.com // that resides on the host system. So, any write on a real system 177611383Sbrandon.potter@amd.com // would cause the change to be propagated to the file mapping at 177711383Sbrandon.potter@amd.com // some point in the future (the inode is tracked along with the 177811383Sbrandon.potter@amd.com // mapping). This isn't guaranteed to always happen, but it usually 177911383Sbrandon.potter@amd.com // works well enough. The guarantee is provided by the msync system 178011383Sbrandon.potter@amd.com // call. We could force the change through with shared mappings with 178111383Sbrandon.potter@amd.com // a call to msync, but that again would require more information 178211383Sbrandon.potter@amd.com // than we currently maintain. 178311383Sbrandon.potter@amd.com warn("mmap: writing to shared mmap region is currently " 178411383Sbrandon.potter@amd.com "unsupported. The write succeeds on the target, but it " 178511383Sbrandon.potter@amd.com "will not be propagated to the host or shared mappings"); 17868324Ssteve.reinhardt@amd.com } 17875877Shsul@eecs.umich.edu 178810486Stjablin@gmail.com length = roundUp(length, TheISA::PageBytes); 178910486Stjablin@gmail.com 179011383Sbrandon.potter@amd.com int sim_fd = -1; 179111383Sbrandon.potter@amd.com uint8_t *pmap = nullptr; 179211383Sbrandon.potter@amd.com if (!(tgt_flags & OS::TGT_MAP_ANONYMOUS)) { 179311856Sbrandon.potter@amd.com std::shared_ptr<FDEntry> fdep = (*p->fds)[tgt_fd]; 179411624Smichael.lebeane@amd.com 179511856Sbrandon.potter@amd.com auto dfdp = std::dynamic_pointer_cast<DeviceFDEntry>(fdep); 179611856Sbrandon.potter@amd.com if (dfdp) { 179711856Sbrandon.potter@amd.com EmulatedDriver *emul_driver = dfdp->getDriver(); 179813995Sbrandon.potter@amd.com return emul_driver->mmap(tc, start, length, prot, tgt_flags, 179913995Sbrandon.potter@amd.com tgt_fd, offset); 180011624Smichael.lebeane@amd.com } 180111624Smichael.lebeane@amd.com 180211856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(fdep); 180311856Sbrandon.potter@amd.com if (!ffdp) 180411383Sbrandon.potter@amd.com return -EBADF; 180511856Sbrandon.potter@amd.com sim_fd = ffdp->getSimFD(); 1806360SN/A 180711913SBrandon.Potter@amd.com pmap = (decltype(pmap))mmap(nullptr, length, PROT_READ, MAP_PRIVATE, 180811383Sbrandon.potter@amd.com sim_fd, offset); 18098600Ssteve.reinhardt@amd.com 181011383Sbrandon.potter@amd.com if (pmap == (decltype(pmap))-1) { 181111383Sbrandon.potter@amd.com warn("mmap: failed to map file into host address space"); 181211383Sbrandon.potter@amd.com return -errno; 18138600Ssteve.reinhardt@amd.com } 18142544SN/A } 18152544SN/A 181611383Sbrandon.potter@amd.com // Extend global mmap region if necessary. Note that we ignore the 181711383Sbrandon.potter@amd.com // start address unless MAP_FIXED is specified. 181811383Sbrandon.potter@amd.com if (!(tgt_flags & OS::TGT_MAP_FIXED)) { 181911905SBrandon.Potter@amd.com std::shared_ptr<MemState> mem_state = p->memState; 182011905SBrandon.Potter@amd.com Addr mmap_end = mem_state->getMmapEnd(); 182111905SBrandon.Potter@amd.com 182211905SBrandon.Potter@amd.com start = p->mmapGrowsDown() ? mmap_end - length : mmap_end; 182311905SBrandon.Potter@amd.com mmap_end = p->mmapGrowsDown() ? start : mmap_end + length; 182411905SBrandon.Potter@amd.com 182511905SBrandon.Potter@amd.com mem_state->setMmapEnd(mmap_end); 182611383Sbrandon.potter@amd.com } 182711383Sbrandon.potter@amd.com 182811383Sbrandon.potter@amd.com DPRINTF_SYSCALL(Verbose, " mmap range is 0x%x - 0x%x\n", 182911383Sbrandon.potter@amd.com start, start + length - 1); 183011383Sbrandon.potter@amd.com 183111383Sbrandon.potter@amd.com // We only allow mappings to overwrite existing mappings if 183211383Sbrandon.potter@amd.com // TGT_MAP_FIXED is set. Otherwise it shouldn't be a problem 183311383Sbrandon.potter@amd.com // because we ignore the start hint if TGT_MAP_FIXED is not set. 183411383Sbrandon.potter@amd.com int clobber = tgt_flags & OS::TGT_MAP_FIXED; 183511383Sbrandon.potter@amd.com if (clobber) { 183611383Sbrandon.potter@amd.com for (auto tc : p->system->threadContexts) { 183711383Sbrandon.potter@amd.com // If we might be overwriting old mappings, we need to 183811383Sbrandon.potter@amd.com // invalidate potentially stale mappings out of the TLBs. 183911383Sbrandon.potter@amd.com tc->getDTBPtr()->flushAll(); 184011383Sbrandon.potter@amd.com tc->getITBPtr()->flushAll(); 18418600Ssteve.reinhardt@amd.com } 18426672Sgblack@eecs.umich.edu } 18438600Ssteve.reinhardt@amd.com 184411383Sbrandon.potter@amd.com // Allocate physical memory and map it in. If the page table is already 184511383Sbrandon.potter@amd.com // mapped and clobber is not set, the simulator will issue throw a 184611383Sbrandon.potter@amd.com // fatal and bail out of the simulation. 18478601Ssteve.reinhardt@amd.com p->allocateMem(start, length, clobber); 18482544SN/A 184911383Sbrandon.potter@amd.com // Transfer content into target address space. 185014024Sgabeblack@google.com PortProxy &tp = tc->getVirtProxy(); 185111383Sbrandon.potter@amd.com if (tgt_flags & OS::TGT_MAP_ANONYMOUS) { 185211383Sbrandon.potter@amd.com // In general, we should zero the mapped area for anonymous mappings, 185311383Sbrandon.potter@amd.com // with something like: 185411383Sbrandon.potter@amd.com // tp.memsetBlob(start, 0, length); 185511383Sbrandon.potter@amd.com // However, given that we don't support sparse mappings, and 185611383Sbrandon.potter@amd.com // some applications can map a couple of gigabytes of space 185711383Sbrandon.potter@amd.com // (intending sparse usage), that can get painfully expensive. 185811383Sbrandon.potter@amd.com // Fortunately, since we don't properly implement munmap either, 185911383Sbrandon.potter@amd.com // there's no danger of remapping used memory, so for now all 186011383Sbrandon.potter@amd.com // newly mapped memory should already be zeroed so we can skip it. 186111383Sbrandon.potter@amd.com } else { 186211383Sbrandon.potter@amd.com // It is possible to mmap an area larger than a file, however 186311383Sbrandon.potter@amd.com // accessing unmapped portions the system triggers a "Bus error" 186411383Sbrandon.potter@amd.com // on the host. We must know when to stop copying the file from 186511383Sbrandon.potter@amd.com // the host into the target address space. 186611383Sbrandon.potter@amd.com struct stat file_stat; 186711383Sbrandon.potter@amd.com if (fstat(sim_fd, &file_stat) > 0) 186811383Sbrandon.potter@amd.com fatal("mmap: cannot stat file"); 186911383Sbrandon.potter@amd.com 187011383Sbrandon.potter@amd.com // Copy the portion of the file that is resident. This requires 187111383Sbrandon.potter@amd.com // checking both the mmap size and the filesize that we are 187211383Sbrandon.potter@amd.com // trying to mmap into this space; the mmap size also depends 187311383Sbrandon.potter@amd.com // on the specified offset into the file. 187411383Sbrandon.potter@amd.com uint64_t size = std::min((uint64_t)file_stat.st_size - offset, 187511383Sbrandon.potter@amd.com length); 187611383Sbrandon.potter@amd.com tp.writeBlob(start, pmap, size); 187711383Sbrandon.potter@amd.com 187811383Sbrandon.potter@amd.com // Cleanup the mmap region before exiting this function. 187911383Sbrandon.potter@amd.com munmap(pmap, length); 188011383Sbrandon.potter@amd.com 188111392Sbrandon.potter@amd.com // Maintain the symbol table for dynamic executables. 188211392Sbrandon.potter@amd.com // The loader will call mmap to map the images into its address 188311392Sbrandon.potter@amd.com // space and we intercept that here. We can verify that we are 188411392Sbrandon.potter@amd.com // executing inside the loader by checking the program counter value. 188511392Sbrandon.potter@amd.com // XXX: with multiprogrammed workloads or multi-node configurations, 188611392Sbrandon.potter@amd.com // this will not work since there is a single global symbol table. 188711392Sbrandon.potter@amd.com ObjectFile *interpreter = p->getInterpreter(); 188811392Sbrandon.potter@amd.com if (interpreter) { 188911392Sbrandon.potter@amd.com Addr text_start = interpreter->textBase(); 189011392Sbrandon.potter@amd.com Addr text_end = text_start + interpreter->textSize(); 189111392Sbrandon.potter@amd.com 189211392Sbrandon.potter@amd.com Addr pc = tc->pcState().pc(); 189311392Sbrandon.potter@amd.com 189411392Sbrandon.potter@amd.com if (pc >= text_start && pc < text_end) { 189511856Sbrandon.potter@amd.com std::shared_ptr<FDEntry> fdep = (*p->fds)[tgt_fd]; 189611856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(fdep); 189711856Sbrandon.potter@amd.com ObjectFile *lib = createObjectFile(ffdp->getFileName()); 189811392Sbrandon.potter@amd.com 189911392Sbrandon.potter@amd.com if (lib) { 190011392Sbrandon.potter@amd.com lib->loadAllSymbols(debugSymbolTable, 190111392Sbrandon.potter@amd.com lib->textBase(), start); 190211392Sbrandon.potter@amd.com } 190311392Sbrandon.potter@amd.com } 190411392Sbrandon.potter@amd.com } 190511392Sbrandon.potter@amd.com 190611383Sbrandon.potter@amd.com // Note that we do not zero out the remainder of the mapping. This 190711383Sbrandon.potter@amd.com // is done by a real system, but it probably will not affect 190811383Sbrandon.potter@amd.com // execution (hopefully). 190911383Sbrandon.potter@amd.com } 191011383Sbrandon.potter@amd.com 19111458SN/A return start; 1912360SN/A} 1913360SN/A 191411593Santhony.gutierrez@amd.comtemplate <class OS> 191511593Santhony.gutierrez@amd.comSyscallReturn 191613995Sbrandon.potter@amd.compwrite64Func(SyscallDesc *desc, int num, ThreadContext *tc) 191711593Santhony.gutierrez@amd.com{ 191811593Santhony.gutierrez@amd.com int index = 0; 191913995Sbrandon.potter@amd.com auto p = tc->getProcessPtr(); 192011593Santhony.gutierrez@amd.com int tgt_fd = p->getSyscallArg(tc, index); 192111593Santhony.gutierrez@amd.com Addr bufPtr = p->getSyscallArg(tc, index); 192211593Santhony.gutierrez@amd.com int nbytes = p->getSyscallArg(tc, index); 192311593Santhony.gutierrez@amd.com int offset = p->getSyscallArg(tc, index); 192411593Santhony.gutierrez@amd.com 192511856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 192611856Sbrandon.potter@amd.com if (!ffdp) 192711593Santhony.gutierrez@amd.com return -EBADF; 192811856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 192911593Santhony.gutierrez@amd.com 193011593Santhony.gutierrez@amd.com BufferArg bufArg(bufPtr, nbytes); 193114024Sgabeblack@google.com bufArg.copyIn(tc->getVirtProxy()); 193211593Santhony.gutierrez@amd.com 193311594Santhony.gutierrez@amd.com int bytes_written = pwrite(sim_fd, bufArg.bufferPtr(), nbytes, offset); 193411593Santhony.gutierrez@amd.com 193511593Santhony.gutierrez@amd.com return (bytes_written == -1) ? -errno : bytes_written; 193611593Santhony.gutierrez@amd.com} 193711593Santhony.gutierrez@amd.com 193811385Sbrandon.potter@amd.com/// Target mmap() handler. 193911385Sbrandon.potter@amd.comtemplate <class OS> 194011385Sbrandon.potter@amd.comSyscallReturn 194113995Sbrandon.potter@amd.commmapFunc(SyscallDesc *desc, int num, ThreadContext *tc) 194211385Sbrandon.potter@amd.com{ 194313995Sbrandon.potter@amd.com return mmapImpl<OS>(desc, num, tc, false); 194411385Sbrandon.potter@amd.com} 194511385Sbrandon.potter@amd.com 194611385Sbrandon.potter@amd.com/// Target mmap2() handler. 194711385Sbrandon.potter@amd.comtemplate <class OS> 194811385Sbrandon.potter@amd.comSyscallReturn 194913995Sbrandon.potter@amd.commmap2Func(SyscallDesc *desc, int num, ThreadContext *tc) 195011385Sbrandon.potter@amd.com{ 195113995Sbrandon.potter@amd.com return mmapImpl<OS>(desc, num, tc, true); 195211385Sbrandon.potter@amd.com} 195311385Sbrandon.potter@amd.com 1954378SN/A/// Target getrlimit() handler. 1955360SN/Atemplate <class OS> 19561450SN/ASyscallReturn 195713995Sbrandon.potter@amd.comgetrlimitFunc(SyscallDesc *desc, int callnum, ThreadContext *tc) 1958360SN/A{ 19596701Sgblack@eecs.umich.edu int index = 0; 196013995Sbrandon.potter@amd.com auto process = tc->getProcessPtr(); 19616701Sgblack@eecs.umich.edu unsigned resource = process->getSyscallArg(tc, index); 19626701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::rlimit> rlp(process->getSyscallArg(tc, index)); 1963360SN/A 1964360SN/A switch (resource) { 196511906SBrandon.Potter@amd.com case OS::TGT_RLIMIT_STACK: 196611906SBrandon.Potter@amd.com // max stack size in bytes: make up a number (8MB for now) 196711906SBrandon.Potter@amd.com rlp->rlim_cur = rlp->rlim_max = 8 * 1024 * 1024; 196811906SBrandon.Potter@amd.com rlp->rlim_cur = TheISA::htog(rlp->rlim_cur); 196911906SBrandon.Potter@amd.com rlp->rlim_max = TheISA::htog(rlp->rlim_max); 197011906SBrandon.Potter@amd.com break; 1971360SN/A 197211906SBrandon.Potter@amd.com case OS::TGT_RLIMIT_DATA: 197311906SBrandon.Potter@amd.com // max data segment size in bytes: make up a number 197411906SBrandon.Potter@amd.com rlp->rlim_cur = rlp->rlim_max = 256 * 1024 * 1024; 197511906SBrandon.Potter@amd.com rlp->rlim_cur = TheISA::htog(rlp->rlim_cur); 197611906SBrandon.Potter@amd.com rlp->rlim_max = TheISA::htog(rlp->rlim_max); 197711906SBrandon.Potter@amd.com break; 19785877Shsul@eecs.umich.edu 197914119Sbrandon.potter@amd.com case OS::TGT_RLIMIT_NPROC: 198014119Sbrandon.potter@amd.com rlp->rlim_cur = rlp->rlim_max = tc->getSystemPtr()->numContexts(); 198114119Sbrandon.potter@amd.com rlp->rlim_cur = TheISA::htog(rlp->rlim_cur); 198214119Sbrandon.potter@amd.com rlp->rlim_max = TheISA::htog(rlp->rlim_max); 198314119Sbrandon.potter@amd.com break; 198414119Sbrandon.potter@amd.com 198511906SBrandon.Potter@amd.com default: 198611906SBrandon.Potter@amd.com warn("getrlimit: unimplemented resource %d", resource); 198711906SBrandon.Potter@amd.com return -EINVAL; 198811906SBrandon.Potter@amd.com break; 1989360SN/A } 1990360SN/A 199114024Sgabeblack@google.com rlp.copyOut(tc->getVirtProxy()); 19921458SN/A return 0; 1993360SN/A} 1994360SN/A 199512235Sar4jc@virginia.edutemplate <class OS> 199612235Sar4jc@virginia.eduSyscallReturn 199713995Sbrandon.potter@amd.comprlimitFunc(SyscallDesc *desc, int callnum, ThreadContext *tc) 199812235Sar4jc@virginia.edu{ 199912235Sar4jc@virginia.edu int index = 0; 200013995Sbrandon.potter@amd.com auto process = tc->getProcessPtr(); 200112235Sar4jc@virginia.edu if (process->getSyscallArg(tc, index) != 0) 200212235Sar4jc@virginia.edu { 200312235Sar4jc@virginia.edu warn("prlimit: ignoring rlimits for nonzero pid"); 200412235Sar4jc@virginia.edu return -EPERM; 200512235Sar4jc@virginia.edu } 200612235Sar4jc@virginia.edu int resource = process->getSyscallArg(tc, index); 200712235Sar4jc@virginia.edu Addr n = process->getSyscallArg(tc, index); 200812235Sar4jc@virginia.edu if (n != 0) 200912235Sar4jc@virginia.edu warn("prlimit: ignoring new rlimit"); 201012235Sar4jc@virginia.edu Addr o = process->getSyscallArg(tc, index); 201112235Sar4jc@virginia.edu if (o != 0) 201212235Sar4jc@virginia.edu { 201312416Sqtt2@cornell.edu TypedBufferArg<typename OS::rlimit> rlp(o); 201412235Sar4jc@virginia.edu switch (resource) { 201512235Sar4jc@virginia.edu case OS::TGT_RLIMIT_STACK: 201612235Sar4jc@virginia.edu // max stack size in bytes: make up a number (8MB for now) 201712235Sar4jc@virginia.edu rlp->rlim_cur = rlp->rlim_max = 8 * 1024 * 1024; 201812235Sar4jc@virginia.edu rlp->rlim_cur = TheISA::htog(rlp->rlim_cur); 201912235Sar4jc@virginia.edu rlp->rlim_max = TheISA::htog(rlp->rlim_max); 202012235Sar4jc@virginia.edu break; 202112235Sar4jc@virginia.edu case OS::TGT_RLIMIT_DATA: 202212235Sar4jc@virginia.edu // max data segment size in bytes: make up a number 202312235Sar4jc@virginia.edu rlp->rlim_cur = rlp->rlim_max = 256*1024*1024; 202412235Sar4jc@virginia.edu rlp->rlim_cur = TheISA::htog(rlp->rlim_cur); 202512235Sar4jc@virginia.edu rlp->rlim_max = TheISA::htog(rlp->rlim_max); 202612593Sjason@lowepower.com break; 202712235Sar4jc@virginia.edu default: 202812235Sar4jc@virginia.edu warn("prlimit: unimplemented resource %d", resource); 202912235Sar4jc@virginia.edu return -EINVAL; 203012235Sar4jc@virginia.edu break; 203112235Sar4jc@virginia.edu } 203214024Sgabeblack@google.com rlp.copyOut(tc->getVirtProxy()); 203312235Sar4jc@virginia.edu } 203412235Sar4jc@virginia.edu return 0; 203512235Sar4jc@virginia.edu} 203612235Sar4jc@virginia.edu 203710796Sbrandon.potter@amd.com/// Target clock_gettime() function. 203810796Sbrandon.potter@amd.comtemplate <class OS> 203910796Sbrandon.potter@amd.comSyscallReturn 204013995Sbrandon.potter@amd.comclock_gettimeFunc(SyscallDesc *desc, int num, ThreadContext *tc) 204110796Sbrandon.potter@amd.com{ 204210796Sbrandon.potter@amd.com int index = 1; 204313995Sbrandon.potter@amd.com auto p = tc->getProcessPtr(); 204410796Sbrandon.potter@amd.com //int clk_id = p->getSyscallArg(tc, index); 204510796Sbrandon.potter@amd.com TypedBufferArg<typename OS::timespec> tp(p->getSyscallArg(tc, index)); 204610796Sbrandon.potter@amd.com 204710796Sbrandon.potter@amd.com getElapsedTimeNano(tp->tv_sec, tp->tv_nsec); 204810796Sbrandon.potter@amd.com tp->tv_sec += seconds_since_epoch; 204910796Sbrandon.potter@amd.com tp->tv_sec = TheISA::htog(tp->tv_sec); 205010796Sbrandon.potter@amd.com tp->tv_nsec = TheISA::htog(tp->tv_nsec); 205110796Sbrandon.potter@amd.com 205214024Sgabeblack@google.com tp.copyOut(tc->getVirtProxy()); 205310796Sbrandon.potter@amd.com 205410796Sbrandon.potter@amd.com return 0; 205510796Sbrandon.potter@amd.com} 205610796Sbrandon.potter@amd.com 205711337SMichael.Lebeane@amd.com/// Target clock_getres() function. 205811337SMichael.Lebeane@amd.comtemplate <class OS> 205911337SMichael.Lebeane@amd.comSyscallReturn 206013995Sbrandon.potter@amd.comclock_getresFunc(SyscallDesc *desc, int num, ThreadContext *tc) 206111337SMichael.Lebeane@amd.com{ 206211337SMichael.Lebeane@amd.com int index = 1; 206313995Sbrandon.potter@amd.com auto p = tc->getProcessPtr(); 206411337SMichael.Lebeane@amd.com TypedBufferArg<typename OS::timespec> tp(p->getSyscallArg(tc, index)); 206511337SMichael.Lebeane@amd.com 206611337SMichael.Lebeane@amd.com // Set resolution at ns, which is what clock_gettime() returns 206711337SMichael.Lebeane@amd.com tp->tv_sec = 0; 206811337SMichael.Lebeane@amd.com tp->tv_nsec = 1; 206911337SMichael.Lebeane@amd.com 207014024Sgabeblack@google.com tp.copyOut(tc->getVirtProxy()); 207111337SMichael.Lebeane@amd.com 207211337SMichael.Lebeane@amd.com return 0; 207311337SMichael.Lebeane@amd.com} 207411337SMichael.Lebeane@amd.com 2075378SN/A/// Target gettimeofday() handler. 2076360SN/Atemplate <class OS> 20771450SN/ASyscallReturn 207813995Sbrandon.potter@amd.comgettimeofdayFunc(SyscallDesc *desc, int callnum, ThreadContext *tc) 2079360SN/A{ 20806701Sgblack@eecs.umich.edu int index = 0; 208113995Sbrandon.potter@amd.com auto process = tc->getProcessPtr(); 20826701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::timeval> tp(process->getSyscallArg(tc, index)); 2083360SN/A 208410796Sbrandon.potter@amd.com getElapsedTimeMicro(tp->tv_sec, tp->tv_usec); 2085360SN/A tp->tv_sec += seconds_since_epoch; 20866109Ssanchezd@stanford.edu tp->tv_sec = TheISA::htog(tp->tv_sec); 20876109Ssanchezd@stanford.edu tp->tv_usec = TheISA::htog(tp->tv_usec); 2088360SN/A 208914024Sgabeblack@google.com tp.copyOut(tc->getVirtProxy()); 2090360SN/A 20911458SN/A return 0; 2092360SN/A} 2093360SN/A 2094360SN/A 20951999SN/A/// Target utimes() handler. 20961999SN/Atemplate <class OS> 20971999SN/ASyscallReturn 209813995Sbrandon.potter@amd.comutimesFunc(SyscallDesc *desc, int callnum, ThreadContext *tc) 20991999SN/A{ 21001999SN/A std::string path; 210113995Sbrandon.potter@amd.com auto process = tc->getProcessPtr(); 21021999SN/A 21036701Sgblack@eecs.umich.edu int index = 0; 210414024Sgabeblack@google.com if (!tc->getVirtProxy().tryReadString(path, 21056701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 21066701Sgblack@eecs.umich.edu return -EFAULT; 21076701Sgblack@eecs.umich.edu } 21081999SN/A 21096701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::timeval [2]> 21106701Sgblack@eecs.umich.edu tp(process->getSyscallArg(tc, index)); 211114024Sgabeblack@google.com tp.copyIn(tc->getVirtProxy()); 21121999SN/A 21131999SN/A struct timeval hostTimeval[2]; 211411906SBrandon.Potter@amd.com for (int i = 0; i < 2; ++i) { 21158737Skoansin.tan@gmail.com hostTimeval[i].tv_sec = TheISA::gtoh((*tp)[i].tv_sec); 21168737Skoansin.tan@gmail.com hostTimeval[i].tv_usec = TheISA::gtoh((*tp)[i].tv_usec); 21171999SN/A } 21183669Sbinkertn@umich.edu 211913883Sdavid.hashe@amd.com // Adjust path for cwd and redirection 212013883Sdavid.hashe@amd.com path = process->checkPathRedirect(path); 21213669Sbinkertn@umich.edu 21221999SN/A int result = utimes(path.c_str(), hostTimeval); 21231999SN/A 21241999SN/A if (result < 0) 21251999SN/A return -errno; 21261999SN/A 21271999SN/A return 0; 21281999SN/A} 212911886Sbrandon.potter@amd.com 213011886Sbrandon.potter@amd.comtemplate <class OS> 213111886Sbrandon.potter@amd.comSyscallReturn 213213995Sbrandon.potter@amd.comexecveFunc(SyscallDesc *desc, int callnum, ThreadContext *tc) 213311886Sbrandon.potter@amd.com{ 213411886Sbrandon.potter@amd.com desc->setFlags(0); 213513995Sbrandon.potter@amd.com auto p = tc->getProcessPtr(); 213611886Sbrandon.potter@amd.com 213711886Sbrandon.potter@amd.com int index = 0; 213811886Sbrandon.potter@amd.com std::string path; 213914024Sgabeblack@google.com PortProxy & mem_proxy = tc->getVirtProxy(); 214011886Sbrandon.potter@amd.com if (!mem_proxy.tryReadString(path, p->getSyscallArg(tc, index))) 214111886Sbrandon.potter@amd.com return -EFAULT; 214211886Sbrandon.potter@amd.com 214311886Sbrandon.potter@amd.com if (access(path.c_str(), F_OK) == -1) 214411886Sbrandon.potter@amd.com return -EACCES; 214511886Sbrandon.potter@amd.com 214614020Sgabeblack@google.com auto read_in = [](std::vector<std::string> &vect, 214714020Sgabeblack@google.com PortProxy &mem_proxy, Addr mem_loc) 214811886Sbrandon.potter@amd.com { 214911886Sbrandon.potter@amd.com for (int inc = 0; ; inc++) { 215011886Sbrandon.potter@amd.com BufferArg b((mem_loc + sizeof(Addr) * inc), sizeof(Addr)); 215111886Sbrandon.potter@amd.com b.copyIn(mem_proxy); 215211886Sbrandon.potter@amd.com 215311886Sbrandon.potter@amd.com if (!*(Addr*)b.bufferPtr()) 215411886Sbrandon.potter@amd.com break; 215511886Sbrandon.potter@amd.com 215611886Sbrandon.potter@amd.com vect.push_back(std::string()); 215711886Sbrandon.potter@amd.com mem_proxy.tryReadString(vect[inc], *(Addr*)b.bufferPtr()); 215811886Sbrandon.potter@amd.com } 215911886Sbrandon.potter@amd.com }; 216011886Sbrandon.potter@amd.com 216111886Sbrandon.potter@amd.com /** 216211886Sbrandon.potter@amd.com * Note that ProcessParams is generated by swig and there are no other 216311886Sbrandon.potter@amd.com * examples of how to create anything but this default constructor. The 216411886Sbrandon.potter@amd.com * fields are manually initialized instead of passing parameters to the 216511886Sbrandon.potter@amd.com * constructor. 216611886Sbrandon.potter@amd.com */ 216711886Sbrandon.potter@amd.com ProcessParams *pp = new ProcessParams(); 216811886Sbrandon.potter@amd.com pp->executable = path; 216911886Sbrandon.potter@amd.com Addr argv_mem_loc = p->getSyscallArg(tc, index); 217011886Sbrandon.potter@amd.com read_in(pp->cmd, mem_proxy, argv_mem_loc); 217111886Sbrandon.potter@amd.com Addr envp_mem_loc = p->getSyscallArg(tc, index); 217211886Sbrandon.potter@amd.com read_in(pp->env, mem_proxy, envp_mem_loc); 217311886Sbrandon.potter@amd.com pp->uid = p->uid(); 217411886Sbrandon.potter@amd.com pp->egid = p->egid(); 217511886Sbrandon.potter@amd.com pp->euid = p->euid(); 217611886Sbrandon.potter@amd.com pp->gid = p->gid(); 217711886Sbrandon.potter@amd.com pp->ppid = p->ppid(); 217811886Sbrandon.potter@amd.com pp->pid = p->pid(); 217911886Sbrandon.potter@amd.com pp->input.assign("cin"); 218011886Sbrandon.potter@amd.com pp->output.assign("cout"); 218111886Sbrandon.potter@amd.com pp->errout.assign("cerr"); 218213883Sdavid.hashe@amd.com pp->cwd.assign(p->tgtCwd); 218311886Sbrandon.potter@amd.com pp->system = p->system; 218411886Sbrandon.potter@amd.com /** 218511886Sbrandon.potter@amd.com * Prevent process object creation with identical PIDs (which will trip 218611886Sbrandon.potter@amd.com * a fatal check in Process constructor). The execve call is supposed to 218711886Sbrandon.potter@amd.com * take over the currently executing process' identity but replace 218811886Sbrandon.potter@amd.com * whatever it is doing with a new process image. Instead of hijacking 218911886Sbrandon.potter@amd.com * the process object in the simulator, we create a new process object 219011886Sbrandon.potter@amd.com * and bind to the previous process' thread below (hijacking the thread). 219111886Sbrandon.potter@amd.com */ 219211886Sbrandon.potter@amd.com p->system->PIDs.erase(p->pid()); 219311886Sbrandon.potter@amd.com Process *new_p = pp->create(); 219411886Sbrandon.potter@amd.com delete pp; 219511886Sbrandon.potter@amd.com 219611886Sbrandon.potter@amd.com /** 219711886Sbrandon.potter@amd.com * Work through the file descriptor array and close any files marked 219811886Sbrandon.potter@amd.com * close-on-exec. 219911886Sbrandon.potter@amd.com */ 220011886Sbrandon.potter@amd.com new_p->fds = p->fds; 220111886Sbrandon.potter@amd.com for (int i = 0; i < new_p->fds->getSize(); i++) { 220211886Sbrandon.potter@amd.com std::shared_ptr<FDEntry> fdep = (*new_p->fds)[i]; 220311886Sbrandon.potter@amd.com if (fdep && fdep->getCOE()) 220411886Sbrandon.potter@amd.com new_p->fds->closeFDEntry(i); 220511886Sbrandon.potter@amd.com } 220611886Sbrandon.potter@amd.com 220711886Sbrandon.potter@amd.com *new_p->sigchld = true; 220811886Sbrandon.potter@amd.com 220911886Sbrandon.potter@amd.com delete p; 221011886Sbrandon.potter@amd.com tc->clearArchRegs(); 221111886Sbrandon.potter@amd.com tc->setProcessPtr(new_p); 221211886Sbrandon.potter@amd.com new_p->assignThreadContext(tc->contextId()); 221311886Sbrandon.potter@amd.com new_p->initState(); 221411886Sbrandon.potter@amd.com tc->activate(); 221511886Sbrandon.potter@amd.com TheISA::PCState pcState = tc->pcState(); 221611886Sbrandon.potter@amd.com tc->setNPC(pcState.instAddr()); 221711886Sbrandon.potter@amd.com 221811886Sbrandon.potter@amd.com desc->setFlags(SyscallDesc::SuppressReturnValue); 221911886Sbrandon.potter@amd.com return 0; 222011886Sbrandon.potter@amd.com} 222111886Sbrandon.potter@amd.com 2222378SN/A/// Target getrusage() function. 2223360SN/Atemplate <class OS> 22241450SN/ASyscallReturn 222513995Sbrandon.potter@amd.comgetrusageFunc(SyscallDesc *desc, int callnum, ThreadContext *tc) 2226360SN/A{ 22276701Sgblack@eecs.umich.edu int index = 0; 222813995Sbrandon.potter@amd.com auto process = tc->getProcessPtr(); 22296701Sgblack@eecs.umich.edu int who = process->getSyscallArg(tc, index); // THREAD, SELF, or CHILDREN 22306701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::rusage> rup(process->getSyscallArg(tc, index)); 2231360SN/A 22323670Sbinkertn@umich.edu rup->ru_utime.tv_sec = 0; 22333670Sbinkertn@umich.edu rup->ru_utime.tv_usec = 0; 2234360SN/A rup->ru_stime.tv_sec = 0; 2235360SN/A rup->ru_stime.tv_usec = 0; 2236360SN/A rup->ru_maxrss = 0; 2237360SN/A rup->ru_ixrss = 0; 2238360SN/A rup->ru_idrss = 0; 2239360SN/A rup->ru_isrss = 0; 2240360SN/A rup->ru_minflt = 0; 2241360SN/A rup->ru_majflt = 0; 2242360SN/A rup->ru_nswap = 0; 2243360SN/A rup->ru_inblock = 0; 2244360SN/A rup->ru_oublock = 0; 2245360SN/A rup->ru_msgsnd = 0; 2246360SN/A rup->ru_msgrcv = 0; 2247360SN/A rup->ru_nsignals = 0; 2248360SN/A rup->ru_nvcsw = 0; 2249360SN/A rup->ru_nivcsw = 0; 2250360SN/A 22513670Sbinkertn@umich.edu switch (who) { 22523670Sbinkertn@umich.edu case OS::TGT_RUSAGE_SELF: 225310796Sbrandon.potter@amd.com getElapsedTimeMicro(rup->ru_utime.tv_sec, rup->ru_utime.tv_usec); 22548737Skoansin.tan@gmail.com rup->ru_utime.tv_sec = TheISA::htog(rup->ru_utime.tv_sec); 22558737Skoansin.tan@gmail.com rup->ru_utime.tv_usec = TheISA::htog(rup->ru_utime.tv_usec); 22563670Sbinkertn@umich.edu break; 22573670Sbinkertn@umich.edu 22583670Sbinkertn@umich.edu case OS::TGT_RUSAGE_CHILDREN: 22593670Sbinkertn@umich.edu // do nothing. We have no child processes, so they take no time. 22603670Sbinkertn@umich.edu break; 22613670Sbinkertn@umich.edu 22623670Sbinkertn@umich.edu default: 22633670Sbinkertn@umich.edu // don't really handle THREAD or CHILDREN, but just warn and 22643670Sbinkertn@umich.edu // plow ahead 22653670Sbinkertn@umich.edu warn("getrusage() only supports RUSAGE_SELF. Parameter %d ignored.", 22663670Sbinkertn@umich.edu who); 22673670Sbinkertn@umich.edu } 22683670Sbinkertn@umich.edu 226914024Sgabeblack@google.com rup.copyOut(tc->getVirtProxy()); 2270360SN/A 22711458SN/A return 0; 2272360SN/A} 2273360SN/A 22746683Stjones1@inf.ed.ac.uk/// Target times() function. 22756683Stjones1@inf.ed.ac.uktemplate <class OS> 22766683Stjones1@inf.ed.ac.ukSyscallReturn 227713995Sbrandon.potter@amd.comtimesFunc(SyscallDesc *desc, int callnum, ThreadContext *tc) 22786683Stjones1@inf.ed.ac.uk{ 22796701Sgblack@eecs.umich.edu int index = 0; 228013995Sbrandon.potter@amd.com auto process = tc->getProcessPtr(); 22816701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::tms> bufp(process->getSyscallArg(tc, index)); 22826683Stjones1@inf.ed.ac.uk 22836683Stjones1@inf.ed.ac.uk // Fill in the time structure (in clocks) 22847823Ssteve.reinhardt@amd.com int64_t clocks = curTick() * OS::M5_SC_CLK_TCK / SimClock::Int::s; 22856683Stjones1@inf.ed.ac.uk bufp->tms_utime = clocks; 22866683Stjones1@inf.ed.ac.uk bufp->tms_stime = 0; 22876683Stjones1@inf.ed.ac.uk bufp->tms_cutime = 0; 22886683Stjones1@inf.ed.ac.uk bufp->tms_cstime = 0; 22896683Stjones1@inf.ed.ac.uk 22906683Stjones1@inf.ed.ac.uk // Convert to host endianness 22918737Skoansin.tan@gmail.com bufp->tms_utime = TheISA::htog(bufp->tms_utime); 22926683Stjones1@inf.ed.ac.uk 22936683Stjones1@inf.ed.ac.uk // Write back 229414024Sgabeblack@google.com bufp.copyOut(tc->getVirtProxy()); 22956683Stjones1@inf.ed.ac.uk 22966683Stjones1@inf.ed.ac.uk // Return clock ticks since system boot 22976683Stjones1@inf.ed.ac.uk return clocks; 22986683Stjones1@inf.ed.ac.uk} 22992553SN/A 23006684Stjones1@inf.ed.ac.uk/// Target time() function. 23016684Stjones1@inf.ed.ac.uktemplate <class OS> 23026684Stjones1@inf.ed.ac.ukSyscallReturn 230313995Sbrandon.potter@amd.comtimeFunc(SyscallDesc *desc, int callnum, ThreadContext *tc) 23046684Stjones1@inf.ed.ac.uk{ 23056684Stjones1@inf.ed.ac.uk typename OS::time_t sec, usec; 230610796Sbrandon.potter@amd.com getElapsedTimeMicro(sec, usec); 23076684Stjones1@inf.ed.ac.uk sec += seconds_since_epoch; 23086684Stjones1@inf.ed.ac.uk 23096701Sgblack@eecs.umich.edu int index = 0; 231013995Sbrandon.potter@amd.com auto process = tc->getProcessPtr(); 23116701Sgblack@eecs.umich.edu Addr taddr = (Addr)process->getSyscallArg(tc, index); 231211321Ssteve.reinhardt@amd.com if (taddr != 0) { 23136684Stjones1@inf.ed.ac.uk typename OS::time_t t = sec; 23148737Skoansin.tan@gmail.com t = TheISA::htog(t); 231514024Sgabeblack@google.com PortProxy &p = tc->getVirtProxy(); 231614010Sgabeblack@google.com p.writeBlob(taddr, &t, (int)sizeof(typename OS::time_t)); 23176684Stjones1@inf.ed.ac.uk } 23186684Stjones1@inf.ed.ac.uk return sec; 23196684Stjones1@inf.ed.ac.uk} 23202553SN/A 232111910SBrandon.Potter@amd.comtemplate <class OS> 232211910SBrandon.Potter@amd.comSyscallReturn 232313995Sbrandon.potter@amd.comtgkillFunc(SyscallDesc *desc, int num, ThreadContext *tc) 232411910SBrandon.Potter@amd.com{ 232511910SBrandon.Potter@amd.com int index = 0; 232613995Sbrandon.potter@amd.com auto process = tc->getProcessPtr(); 232711910SBrandon.Potter@amd.com int tgid = process->getSyscallArg(tc, index); 232811910SBrandon.Potter@amd.com int tid = process->getSyscallArg(tc, index); 232911910SBrandon.Potter@amd.com int sig = process->getSyscallArg(tc, index); 233011910SBrandon.Potter@amd.com 233111910SBrandon.Potter@amd.com /** 233211910SBrandon.Potter@amd.com * This system call is intended to allow killing a specific thread 233311910SBrandon.Potter@amd.com * within an arbitrary thread group if sanctioned with permission checks. 233411910SBrandon.Potter@amd.com * It's usually true that threads share the termination signal as pointed 233511910SBrandon.Potter@amd.com * out by the pthread_kill man page and this seems to be the intended 233611910SBrandon.Potter@amd.com * usage. Due to this being an emulated environment, assume the following: 233711910SBrandon.Potter@amd.com * Threads are allowed to call tgkill because the EUID for all threads 233811910SBrandon.Potter@amd.com * should be the same. There is no signal handling mechanism for kernel 233911910SBrandon.Potter@amd.com * registration of signal handlers since signals are poorly supported in 234011910SBrandon.Potter@amd.com * emulation mode. Since signal handlers cannot be registered, all 234111910SBrandon.Potter@amd.com * threads within in a thread group must share the termination signal. 234211910SBrandon.Potter@amd.com * We never exhaust PIDs so there's no chance of finding the wrong one 234311910SBrandon.Potter@amd.com * due to PID rollover. 234411910SBrandon.Potter@amd.com */ 234511910SBrandon.Potter@amd.com 234611910SBrandon.Potter@amd.com System *sys = tc->getSystemPtr(); 234711910SBrandon.Potter@amd.com Process *tgt_proc = nullptr; 234811910SBrandon.Potter@amd.com for (int i = 0; i < sys->numContexts(); i++) { 234911910SBrandon.Potter@amd.com Process *temp = sys->threadContexts[i]->getProcessPtr(); 235011910SBrandon.Potter@amd.com if (temp->pid() == tid) { 235111910SBrandon.Potter@amd.com tgt_proc = temp; 235211910SBrandon.Potter@amd.com break; 235311910SBrandon.Potter@amd.com } 235411910SBrandon.Potter@amd.com } 235511910SBrandon.Potter@amd.com 235611910SBrandon.Potter@amd.com if (sig != 0 || sig != OS::TGT_SIGABRT) 235711910SBrandon.Potter@amd.com return -EINVAL; 235811910SBrandon.Potter@amd.com 235911910SBrandon.Potter@amd.com if (tgt_proc == nullptr) 236011910SBrandon.Potter@amd.com return -ESRCH; 236111910SBrandon.Potter@amd.com 236211910SBrandon.Potter@amd.com if (tgid != -1 && tgt_proc->tgid() != tgid) 236311910SBrandon.Potter@amd.com return -ESRCH; 236411910SBrandon.Potter@amd.com 236511910SBrandon.Potter@amd.com if (sig == OS::TGT_SIGABRT) 236613995Sbrandon.potter@amd.com exitGroupFunc(desc, 252, tc); 236711910SBrandon.Potter@amd.com 236811910SBrandon.Potter@amd.com return 0; 236911910SBrandon.Potter@amd.com} 237011910SBrandon.Potter@amd.com 237113568Sbrandon.potter@amd.comtemplate <class OS> 237213568Sbrandon.potter@amd.comSyscallReturn 237313995Sbrandon.potter@amd.comsocketFunc(SyscallDesc *desc, int num, ThreadContext *tc) 237413568Sbrandon.potter@amd.com{ 237513568Sbrandon.potter@amd.com int index = 0; 237613995Sbrandon.potter@amd.com auto p = tc->getProcessPtr(); 237713568Sbrandon.potter@amd.com int domain = p->getSyscallArg(tc, index); 237813568Sbrandon.potter@amd.com int type = p->getSyscallArg(tc, index); 237913568Sbrandon.potter@amd.com int prot = p->getSyscallArg(tc, index); 238013568Sbrandon.potter@amd.com 238113568Sbrandon.potter@amd.com int sim_fd = socket(domain, type, prot); 238213568Sbrandon.potter@amd.com if (sim_fd == -1) 238313568Sbrandon.potter@amd.com return -errno; 238413568Sbrandon.potter@amd.com 238513568Sbrandon.potter@amd.com auto sfdp = std::make_shared<SocketFDEntry>(sim_fd, domain, type, prot); 238613568Sbrandon.potter@amd.com int tgt_fd = p->fds->allocFD(sfdp); 238713568Sbrandon.potter@amd.com 238813568Sbrandon.potter@amd.com return tgt_fd; 238913568Sbrandon.potter@amd.com} 239013568Sbrandon.potter@amd.com 239113568Sbrandon.potter@amd.comtemplate <class OS> 239213568Sbrandon.potter@amd.comSyscallReturn 239313995Sbrandon.potter@amd.comsocketpairFunc(SyscallDesc *desc, int num, ThreadContext *tc) 239413568Sbrandon.potter@amd.com{ 239513568Sbrandon.potter@amd.com int index = 0; 239613995Sbrandon.potter@amd.com auto p = tc->getProcessPtr(); 239713568Sbrandon.potter@amd.com int domain = p->getSyscallArg(tc, index); 239813568Sbrandon.potter@amd.com int type = p->getSyscallArg(tc, index); 239913568Sbrandon.potter@amd.com int prot = p->getSyscallArg(tc, index); 240013568Sbrandon.potter@amd.com Addr svPtr = p->getSyscallArg(tc, index); 240113568Sbrandon.potter@amd.com 240213568Sbrandon.potter@amd.com BufferArg svBuf((Addr)svPtr, 2 * sizeof(int)); 240313568Sbrandon.potter@amd.com int status = socketpair(domain, type, prot, (int *)svBuf.bufferPtr()); 240413568Sbrandon.potter@amd.com if (status == -1) 240513568Sbrandon.potter@amd.com return -errno; 240613568Sbrandon.potter@amd.com 240713568Sbrandon.potter@amd.com int *fds = (int *)svBuf.bufferPtr(); 240813568Sbrandon.potter@amd.com 240913568Sbrandon.potter@amd.com auto sfdp1 = std::make_shared<SocketFDEntry>(fds[0], domain, type, prot); 241013568Sbrandon.potter@amd.com fds[0] = p->fds->allocFD(sfdp1); 241113568Sbrandon.potter@amd.com auto sfdp2 = std::make_shared<SocketFDEntry>(fds[1], domain, type, prot); 241213568Sbrandon.potter@amd.com fds[1] = p->fds->allocFD(sfdp2); 241314024Sgabeblack@google.com svBuf.copyOut(tc->getVirtProxy()); 241413568Sbrandon.potter@amd.com 241513568Sbrandon.potter@amd.com return status; 241613568Sbrandon.potter@amd.com} 24172553SN/A 241813570Sbrandon.potter@amd.comtemplate <class OS> 241913570Sbrandon.potter@amd.comSyscallReturn 242013995Sbrandon.potter@amd.comselectFunc(SyscallDesc *desc, int callnum, ThreadContext *tc) 242113570Sbrandon.potter@amd.com{ 242213570Sbrandon.potter@amd.com int retval; 242313570Sbrandon.potter@amd.com 242413570Sbrandon.potter@amd.com int index = 0; 242513995Sbrandon.potter@amd.com auto p = tc->getProcessPtr(); 242613570Sbrandon.potter@amd.com int nfds_t = p->getSyscallArg(tc, index); 242713570Sbrandon.potter@amd.com Addr fds_read_ptr = p->getSyscallArg(tc, index); 242813570Sbrandon.potter@amd.com Addr fds_writ_ptr = p->getSyscallArg(tc, index); 242913570Sbrandon.potter@amd.com Addr fds_excp_ptr = p->getSyscallArg(tc, index); 243013570Sbrandon.potter@amd.com Addr time_val_ptr = p->getSyscallArg(tc, index); 243113570Sbrandon.potter@amd.com 243213570Sbrandon.potter@amd.com TypedBufferArg<typename OS::fd_set> rd_t(fds_read_ptr); 243313570Sbrandon.potter@amd.com TypedBufferArg<typename OS::fd_set> wr_t(fds_writ_ptr); 243413570Sbrandon.potter@amd.com TypedBufferArg<typename OS::fd_set> ex_t(fds_excp_ptr); 243513570Sbrandon.potter@amd.com TypedBufferArg<typename OS::timeval> tp(time_val_ptr); 243613570Sbrandon.potter@amd.com 243713570Sbrandon.potter@amd.com /** 243813570Sbrandon.potter@amd.com * Host fields. Notice that these use the definitions from the system 243913570Sbrandon.potter@amd.com * headers instead of the gem5 headers and libraries. If the host and 244013570Sbrandon.potter@amd.com * target have different header file definitions, this will not work. 244113570Sbrandon.potter@amd.com */ 244213570Sbrandon.potter@amd.com fd_set rd_h; 244313570Sbrandon.potter@amd.com FD_ZERO(&rd_h); 244413570Sbrandon.potter@amd.com fd_set wr_h; 244513570Sbrandon.potter@amd.com FD_ZERO(&wr_h); 244613570Sbrandon.potter@amd.com fd_set ex_h; 244713570Sbrandon.potter@amd.com FD_ZERO(&ex_h); 244813570Sbrandon.potter@amd.com 244913570Sbrandon.potter@amd.com /** 245013570Sbrandon.potter@amd.com * Copy in the fd_set from the target. 245113570Sbrandon.potter@amd.com */ 245213570Sbrandon.potter@amd.com if (fds_read_ptr) 245314024Sgabeblack@google.com rd_t.copyIn(tc->getVirtProxy()); 245413570Sbrandon.potter@amd.com if (fds_writ_ptr) 245514024Sgabeblack@google.com wr_t.copyIn(tc->getVirtProxy()); 245613570Sbrandon.potter@amd.com if (fds_excp_ptr) 245714024Sgabeblack@google.com ex_t.copyIn(tc->getVirtProxy()); 245813570Sbrandon.potter@amd.com 245913570Sbrandon.potter@amd.com /** 246013570Sbrandon.potter@amd.com * We need to translate the target file descriptor set into a host file 246113570Sbrandon.potter@amd.com * descriptor set. This involves both our internal process fd array 246213570Sbrandon.potter@amd.com * and the fd_set defined in Linux header files. The nfds field also 246313570Sbrandon.potter@amd.com * needs to be updated as it will be only target specific after 246413570Sbrandon.potter@amd.com * retrieving it from the target; the nfds value is expected to be the 246513570Sbrandon.potter@amd.com * highest file descriptor that needs to be checked, so we need to extend 246613570Sbrandon.potter@amd.com * it out for nfds_h when we do the update. 246713570Sbrandon.potter@amd.com */ 246813570Sbrandon.potter@amd.com int nfds_h = 0; 246913570Sbrandon.potter@amd.com std::map<int, int> trans_map; 247013570Sbrandon.potter@amd.com auto try_add_host_set = [&](fd_set *tgt_set_entry, 247113570Sbrandon.potter@amd.com fd_set *hst_set_entry, 247213570Sbrandon.potter@amd.com int iter) -> bool 247313570Sbrandon.potter@amd.com { 247413570Sbrandon.potter@amd.com /** 247513570Sbrandon.potter@amd.com * By this point, we know that we are looking at a valid file 247613570Sbrandon.potter@amd.com * descriptor set on the target. We need to check if the target file 247713570Sbrandon.potter@amd.com * descriptor value passed in as iter is part of the set. 247813570Sbrandon.potter@amd.com */ 247913570Sbrandon.potter@amd.com if (FD_ISSET(iter, tgt_set_entry)) { 248013570Sbrandon.potter@amd.com /** 248113570Sbrandon.potter@amd.com * We know that the target file descriptor belongs to the set, 248213570Sbrandon.potter@amd.com * but we do not yet know if the file descriptor is valid or 248313570Sbrandon.potter@amd.com * that we have a host mapping. Check that now. 248413570Sbrandon.potter@amd.com */ 248513570Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[iter]); 248613570Sbrandon.potter@amd.com if (!hbfdp) 248713570Sbrandon.potter@amd.com return true; 248813570Sbrandon.potter@amd.com auto sim_fd = hbfdp->getSimFD(); 248913570Sbrandon.potter@amd.com 249013570Sbrandon.potter@amd.com /** 249113570Sbrandon.potter@amd.com * Add the sim_fd to tgt_fd translation into trans_map for use 249213570Sbrandon.potter@amd.com * later when we need to zero the target fd_set structures and 249313570Sbrandon.potter@amd.com * then update them with hits returned from the host select call. 249413570Sbrandon.potter@amd.com */ 249513570Sbrandon.potter@amd.com trans_map[sim_fd] = iter; 249613570Sbrandon.potter@amd.com 249713570Sbrandon.potter@amd.com /** 249813570Sbrandon.potter@amd.com * We know that the host file descriptor exists so now we check 249913570Sbrandon.potter@amd.com * if we need to update the max count for nfds_h before passing 250013570Sbrandon.potter@amd.com * the duplicated structure into the host. 250113570Sbrandon.potter@amd.com */ 250213570Sbrandon.potter@amd.com nfds_h = std::max(nfds_h - 1, sim_fd + 1); 250313570Sbrandon.potter@amd.com 250413570Sbrandon.potter@amd.com /** 250513570Sbrandon.potter@amd.com * Add the host file descriptor to the set that we are going to 250613570Sbrandon.potter@amd.com * pass into the host. 250713570Sbrandon.potter@amd.com */ 250813570Sbrandon.potter@amd.com FD_SET(sim_fd, hst_set_entry); 250913570Sbrandon.potter@amd.com } 251013570Sbrandon.potter@amd.com return false; 251113570Sbrandon.potter@amd.com }; 251213570Sbrandon.potter@amd.com 251313570Sbrandon.potter@amd.com for (int i = 0; i < nfds_t; i++) { 251413570Sbrandon.potter@amd.com if (fds_read_ptr) { 251513570Sbrandon.potter@amd.com bool ebadf = try_add_host_set((fd_set*)&*rd_t, &rd_h, i); 251613570Sbrandon.potter@amd.com if (ebadf) return -EBADF; 251713570Sbrandon.potter@amd.com } 251813570Sbrandon.potter@amd.com if (fds_writ_ptr) { 251913570Sbrandon.potter@amd.com bool ebadf = try_add_host_set((fd_set*)&*wr_t, &wr_h, i); 252013570Sbrandon.potter@amd.com if (ebadf) return -EBADF; 252113570Sbrandon.potter@amd.com } 252213570Sbrandon.potter@amd.com if (fds_excp_ptr) { 252313570Sbrandon.potter@amd.com bool ebadf = try_add_host_set((fd_set*)&*ex_t, &ex_h, i); 252413570Sbrandon.potter@amd.com if (ebadf) return -EBADF; 252513570Sbrandon.potter@amd.com } 252613570Sbrandon.potter@amd.com } 252713570Sbrandon.potter@amd.com 252813570Sbrandon.potter@amd.com if (time_val_ptr) { 252913570Sbrandon.potter@amd.com /** 253013570Sbrandon.potter@amd.com * It might be possible to decrement the timeval based on some 253113570Sbrandon.potter@amd.com * derivation of wall clock determined from elapsed simulator ticks 253213570Sbrandon.potter@amd.com * but that seems like overkill. Rather, we just set the timeval with 253313570Sbrandon.potter@amd.com * zero timeout. (There is no reason to block during the simulation 253413570Sbrandon.potter@amd.com * as it only decreases simulator performance.) 253513570Sbrandon.potter@amd.com */ 253613570Sbrandon.potter@amd.com tp->tv_sec = 0; 253713570Sbrandon.potter@amd.com tp->tv_usec = 0; 253813570Sbrandon.potter@amd.com 253913570Sbrandon.potter@amd.com retval = select(nfds_h, 254013570Sbrandon.potter@amd.com fds_read_ptr ? &rd_h : nullptr, 254113570Sbrandon.potter@amd.com fds_writ_ptr ? &wr_h : nullptr, 254213570Sbrandon.potter@amd.com fds_excp_ptr ? &ex_h : nullptr, 254313570Sbrandon.potter@amd.com (timeval*)&*tp); 254413570Sbrandon.potter@amd.com } else { 254513570Sbrandon.potter@amd.com /** 254613570Sbrandon.potter@amd.com * If the timeval pointer is null, setup a new timeval structure to 254713570Sbrandon.potter@amd.com * pass into the host select call. Unfortunately, we will need to 254813570Sbrandon.potter@amd.com * manually check the return value and throw a retry fault if the 254913570Sbrandon.potter@amd.com * return value is zero. Allowing the system call to block will 255013570Sbrandon.potter@amd.com * likely deadlock the event queue. 255113570Sbrandon.potter@amd.com */ 255213570Sbrandon.potter@amd.com struct timeval tv = { 0, 0 }; 255313570Sbrandon.potter@amd.com 255413570Sbrandon.potter@amd.com retval = select(nfds_h, 255513570Sbrandon.potter@amd.com fds_read_ptr ? &rd_h : nullptr, 255613570Sbrandon.potter@amd.com fds_writ_ptr ? &wr_h : nullptr, 255713570Sbrandon.potter@amd.com fds_excp_ptr ? &ex_h : nullptr, 255813570Sbrandon.potter@amd.com &tv); 255913570Sbrandon.potter@amd.com 256013570Sbrandon.potter@amd.com if (retval == 0) { 256113570Sbrandon.potter@amd.com /** 256213570Sbrandon.potter@amd.com * If blocking indefinitely, check the signal list to see if a 256313570Sbrandon.potter@amd.com * signal would break the poll out of the retry cycle and try to 256413570Sbrandon.potter@amd.com * return the signal interrupt instead. 256513570Sbrandon.potter@amd.com */ 256613570Sbrandon.potter@amd.com for (auto sig : tc->getSystemPtr()->signalList) 256713570Sbrandon.potter@amd.com if (sig.receiver == p) 256813570Sbrandon.potter@amd.com return -EINTR; 256913570Sbrandon.potter@amd.com return SyscallReturn::retry(); 257013570Sbrandon.potter@amd.com } 257113570Sbrandon.potter@amd.com } 257213570Sbrandon.potter@amd.com 257313570Sbrandon.potter@amd.com if (retval == -1) 257413570Sbrandon.potter@amd.com return -errno; 257513570Sbrandon.potter@amd.com 257613570Sbrandon.potter@amd.com FD_ZERO((fd_set*)&*rd_t); 257713570Sbrandon.potter@amd.com FD_ZERO((fd_set*)&*wr_t); 257813570Sbrandon.potter@amd.com FD_ZERO((fd_set*)&*ex_t); 257913570Sbrandon.potter@amd.com 258013570Sbrandon.potter@amd.com /** 258113570Sbrandon.potter@amd.com * We need to translate the host file descriptor set into a target file 258213570Sbrandon.potter@amd.com * descriptor set. This involves both our internal process fd array 258313570Sbrandon.potter@amd.com * and the fd_set defined in header files. 258413570Sbrandon.potter@amd.com */ 258513570Sbrandon.potter@amd.com for (int i = 0; i < nfds_h; i++) { 258613570Sbrandon.potter@amd.com if (fds_read_ptr) { 258713570Sbrandon.potter@amd.com if (FD_ISSET(i, &rd_h)) 258813570Sbrandon.potter@amd.com FD_SET(trans_map[i], (fd_set*)&*rd_t); 258913570Sbrandon.potter@amd.com } 259013570Sbrandon.potter@amd.com 259113570Sbrandon.potter@amd.com if (fds_writ_ptr) { 259213570Sbrandon.potter@amd.com if (FD_ISSET(i, &wr_h)) 259313570Sbrandon.potter@amd.com FD_SET(trans_map[i], (fd_set*)&*wr_t); 259413570Sbrandon.potter@amd.com } 259513570Sbrandon.potter@amd.com 259613570Sbrandon.potter@amd.com if (fds_excp_ptr) { 259713570Sbrandon.potter@amd.com if (FD_ISSET(i, &ex_h)) 259813570Sbrandon.potter@amd.com FD_SET(trans_map[i], (fd_set*)&*ex_t); 259913570Sbrandon.potter@amd.com } 260013570Sbrandon.potter@amd.com } 260113570Sbrandon.potter@amd.com 260213570Sbrandon.potter@amd.com if (fds_read_ptr) 260314024Sgabeblack@google.com rd_t.copyOut(tc->getVirtProxy()); 260413570Sbrandon.potter@amd.com if (fds_writ_ptr) 260514024Sgabeblack@google.com wr_t.copyOut(tc->getVirtProxy()); 260613570Sbrandon.potter@amd.com if (fds_excp_ptr) 260714024Sgabeblack@google.com ex_t.copyOut(tc->getVirtProxy()); 260813570Sbrandon.potter@amd.com if (time_val_ptr) 260914024Sgabeblack@google.com tp.copyOut(tc->getVirtProxy()); 261013570Sbrandon.potter@amd.com 261113570Sbrandon.potter@amd.com return retval; 261213570Sbrandon.potter@amd.com} 261313570Sbrandon.potter@amd.com 261413570Sbrandon.potter@amd.comtemplate <class OS> 261513570Sbrandon.potter@amd.comSyscallReturn 261613995Sbrandon.potter@amd.comreadFunc(SyscallDesc *desc, int num, ThreadContext *tc) 261713570Sbrandon.potter@amd.com{ 261813570Sbrandon.potter@amd.com int index = 0; 261913995Sbrandon.potter@amd.com auto p = tc->getProcessPtr(); 262013570Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 262113570Sbrandon.potter@amd.com Addr buf_ptr = p->getSyscallArg(tc, index); 262213570Sbrandon.potter@amd.com int nbytes = p->getSyscallArg(tc, index); 262313570Sbrandon.potter@amd.com 262413570Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 262513570Sbrandon.potter@amd.com if (!hbfdp) 262613570Sbrandon.potter@amd.com return -EBADF; 262713570Sbrandon.potter@amd.com int sim_fd = hbfdp->getSimFD(); 262813570Sbrandon.potter@amd.com 262913570Sbrandon.potter@amd.com struct pollfd pfd; 263013570Sbrandon.potter@amd.com pfd.fd = sim_fd; 263113570Sbrandon.potter@amd.com pfd.events = POLLIN | POLLPRI; 263213570Sbrandon.potter@amd.com if ((poll(&pfd, 1, 0) == 0) 263313570Sbrandon.potter@amd.com && !(hbfdp->getFlags() & OS::TGT_O_NONBLOCK)) 263413570Sbrandon.potter@amd.com return SyscallReturn::retry(); 263513570Sbrandon.potter@amd.com 263613570Sbrandon.potter@amd.com BufferArg buf_arg(buf_ptr, nbytes); 263713570Sbrandon.potter@amd.com int bytes_read = read(sim_fd, buf_arg.bufferPtr(), nbytes); 263813570Sbrandon.potter@amd.com 263913570Sbrandon.potter@amd.com if (bytes_read > 0) 264014024Sgabeblack@google.com buf_arg.copyOut(tc->getVirtProxy()); 264113570Sbrandon.potter@amd.com 264213570Sbrandon.potter@amd.com return (bytes_read == -1) ? -errno : bytes_read; 264313570Sbrandon.potter@amd.com} 264413570Sbrandon.potter@amd.com 264513570Sbrandon.potter@amd.comtemplate <class OS> 264613570Sbrandon.potter@amd.comSyscallReturn 264713995Sbrandon.potter@amd.comwriteFunc(SyscallDesc *desc, int num, ThreadContext *tc) 264813570Sbrandon.potter@amd.com{ 264913570Sbrandon.potter@amd.com int index = 0; 265013995Sbrandon.potter@amd.com auto p = tc->getProcessPtr(); 265113570Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 265213570Sbrandon.potter@amd.com Addr buf_ptr = p->getSyscallArg(tc, index); 265313570Sbrandon.potter@amd.com int nbytes = p->getSyscallArg(tc, index); 265413570Sbrandon.potter@amd.com 265513570Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 265613570Sbrandon.potter@amd.com if (!hbfdp) 265713570Sbrandon.potter@amd.com return -EBADF; 265813570Sbrandon.potter@amd.com int sim_fd = hbfdp->getSimFD(); 265913570Sbrandon.potter@amd.com 266013570Sbrandon.potter@amd.com BufferArg buf_arg(buf_ptr, nbytes); 266114024Sgabeblack@google.com buf_arg.copyIn(tc->getVirtProxy()); 266213570Sbrandon.potter@amd.com 266313570Sbrandon.potter@amd.com struct pollfd pfd; 266413570Sbrandon.potter@amd.com pfd.fd = sim_fd; 266513570Sbrandon.potter@amd.com pfd.events = POLLOUT; 266613570Sbrandon.potter@amd.com 266713570Sbrandon.potter@amd.com /** 266813570Sbrandon.potter@amd.com * We don't want to poll on /dev/random. The kernel will not enable the 266913570Sbrandon.potter@amd.com * file descriptor for writing unless the entropy in the system falls 267013570Sbrandon.potter@amd.com * below write_wakeup_threshold. This is not guaranteed to happen 267113570Sbrandon.potter@amd.com * depending on host settings. 267213570Sbrandon.potter@amd.com */ 267313570Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(hbfdp); 267413570Sbrandon.potter@amd.com if (ffdp && (ffdp->getFileName() != "/dev/random")) { 267513570Sbrandon.potter@amd.com if (!poll(&pfd, 1, 0) && !(ffdp->getFlags() & OS::TGT_O_NONBLOCK)) 267613570Sbrandon.potter@amd.com return SyscallReturn::retry(); 267713570Sbrandon.potter@amd.com } 267813570Sbrandon.potter@amd.com 267913570Sbrandon.potter@amd.com int bytes_written = write(sim_fd, buf_arg.bufferPtr(), nbytes); 268013570Sbrandon.potter@amd.com 268113570Sbrandon.potter@amd.com if (bytes_written != -1) 268213570Sbrandon.potter@amd.com fsync(sim_fd); 268313570Sbrandon.potter@amd.com 268413570Sbrandon.potter@amd.com return (bytes_written == -1) ? -errno : bytes_written; 268513570Sbrandon.potter@amd.com} 268613570Sbrandon.potter@amd.com 268713570Sbrandon.potter@amd.comtemplate <class OS> 268813570Sbrandon.potter@amd.comSyscallReturn 268913995Sbrandon.potter@amd.comwait4Func(SyscallDesc *desc, int num, ThreadContext *tc) 269013570Sbrandon.potter@amd.com{ 269113570Sbrandon.potter@amd.com int index = 0; 269213995Sbrandon.potter@amd.com auto p = tc->getProcessPtr(); 269313570Sbrandon.potter@amd.com pid_t pid = p->getSyscallArg(tc, index); 269413570Sbrandon.potter@amd.com Addr statPtr = p->getSyscallArg(tc, index); 269513570Sbrandon.potter@amd.com int options = p->getSyscallArg(tc, index); 269613570Sbrandon.potter@amd.com Addr rusagePtr = p->getSyscallArg(tc, index); 269713570Sbrandon.potter@amd.com 269813570Sbrandon.potter@amd.com if (rusagePtr) 269913907Salexandru.dutu@amd.com DPRINTF_SYSCALL(Verbose, "wait4: rusage pointer provided %lx, however " 270013570Sbrandon.potter@amd.com "functionality not supported. Ignoring rusage pointer.\n", 270113907Salexandru.dutu@amd.com rusagePtr); 270213570Sbrandon.potter@amd.com 270313570Sbrandon.potter@amd.com /** 270413570Sbrandon.potter@amd.com * Currently, wait4 is only implemented so that it will wait for children 270513570Sbrandon.potter@amd.com * exit conditions which are denoted by a SIGCHLD signals posted into the 270613570Sbrandon.potter@amd.com * system signal list. We return no additional information via any of the 270713570Sbrandon.potter@amd.com * parameters supplied to wait4. If nothing is found in the system signal 270813570Sbrandon.potter@amd.com * list, we will wait indefinitely for SIGCHLD to post by retrying the 270913570Sbrandon.potter@amd.com * call. 271013570Sbrandon.potter@amd.com */ 271113570Sbrandon.potter@amd.com System *sysh = tc->getSystemPtr(); 271213570Sbrandon.potter@amd.com std::list<BasicSignal>::iterator iter; 271313570Sbrandon.potter@amd.com for (iter=sysh->signalList.begin(); iter!=sysh->signalList.end(); iter++) { 271413570Sbrandon.potter@amd.com if (iter->receiver == p) { 271513570Sbrandon.potter@amd.com if (pid < -1) { 271613570Sbrandon.potter@amd.com if ((iter->sender->pgid() == -pid) 271713570Sbrandon.potter@amd.com && (iter->signalValue == OS::TGT_SIGCHLD)) 271813570Sbrandon.potter@amd.com goto success; 271913570Sbrandon.potter@amd.com } else if (pid == -1) { 272013570Sbrandon.potter@amd.com if (iter->signalValue == OS::TGT_SIGCHLD) 272113570Sbrandon.potter@amd.com goto success; 272213570Sbrandon.potter@amd.com } else if (pid == 0) { 272313570Sbrandon.potter@amd.com if ((iter->sender->pgid() == p->pgid()) 272413570Sbrandon.potter@amd.com && (iter->signalValue == OS::TGT_SIGCHLD)) 272513570Sbrandon.potter@amd.com goto success; 272613570Sbrandon.potter@amd.com } else { 272713570Sbrandon.potter@amd.com if ((iter->sender->pid() == pid) 272813570Sbrandon.potter@amd.com && (iter->signalValue == OS::TGT_SIGCHLD)) 272913570Sbrandon.potter@amd.com goto success; 273013570Sbrandon.potter@amd.com } 273113570Sbrandon.potter@amd.com } 273213570Sbrandon.potter@amd.com } 273313570Sbrandon.potter@amd.com 273413570Sbrandon.potter@amd.com return (options & OS::TGT_WNOHANG) ? 0 : SyscallReturn::retry(); 273513570Sbrandon.potter@amd.com 273613570Sbrandon.potter@amd.comsuccess: 273713570Sbrandon.potter@amd.com // Set status to EXITED for WIFEXITED evaluations. 273813570Sbrandon.potter@amd.com const int EXITED = 0; 273913570Sbrandon.potter@amd.com BufferArg statusBuf(statPtr, sizeof(int)); 274013570Sbrandon.potter@amd.com *(int *)statusBuf.bufferPtr() = EXITED; 274114024Sgabeblack@google.com statusBuf.copyOut(tc->getVirtProxy()); 274213570Sbrandon.potter@amd.com 274313570Sbrandon.potter@amd.com // Return the child PID. 274413570Sbrandon.potter@amd.com pid_t retval = iter->sender->pid(); 274513570Sbrandon.potter@amd.com sysh->signalList.erase(iter); 274613570Sbrandon.potter@amd.com return retval; 274713570Sbrandon.potter@amd.com} 274813570Sbrandon.potter@amd.com 274913570Sbrandon.potter@amd.comtemplate <class OS> 275013570Sbrandon.potter@amd.comSyscallReturn 275113995Sbrandon.potter@amd.comacceptFunc(SyscallDesc *desc, int num, ThreadContext *tc) 275213570Sbrandon.potter@amd.com{ 275313570Sbrandon.potter@amd.com struct sockaddr sa; 275413570Sbrandon.potter@amd.com socklen_t addrLen; 275513570Sbrandon.potter@amd.com int host_fd; 275613570Sbrandon.potter@amd.com int index = 0; 275713995Sbrandon.potter@amd.com auto p = tc->getProcessPtr(); 275813570Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 275913570Sbrandon.potter@amd.com Addr addrPtr = p->getSyscallArg(tc, index); 276013570Sbrandon.potter@amd.com Addr lenPtr = p->getSyscallArg(tc, index); 276113570Sbrandon.potter@amd.com 276213570Sbrandon.potter@amd.com BufferArg *lenBufPtr = nullptr; 276313570Sbrandon.potter@amd.com BufferArg *addrBufPtr = nullptr; 276413570Sbrandon.potter@amd.com 276513570Sbrandon.potter@amd.com auto sfdp = std::dynamic_pointer_cast<SocketFDEntry>((*p->fds)[tgt_fd]); 276613570Sbrandon.potter@amd.com if (!sfdp) 276713570Sbrandon.potter@amd.com return -EBADF; 276813570Sbrandon.potter@amd.com int sim_fd = sfdp->getSimFD(); 276913570Sbrandon.potter@amd.com 277013570Sbrandon.potter@amd.com /** 277113570Sbrandon.potter@amd.com * We poll the socket file descriptor first to guarantee that we do not 277213570Sbrandon.potter@amd.com * block on our accept call. The socket can be opened without the 277313570Sbrandon.potter@amd.com * non-blocking flag (it blocks). This will cause deadlocks between 277413570Sbrandon.potter@amd.com * communicating processes. 277513570Sbrandon.potter@amd.com */ 277613570Sbrandon.potter@amd.com struct pollfd pfd; 277713570Sbrandon.potter@amd.com pfd.fd = sim_fd; 277813570Sbrandon.potter@amd.com pfd.events = POLLIN | POLLPRI; 277913570Sbrandon.potter@amd.com if ((poll(&pfd, 1, 0) == 0) 278013570Sbrandon.potter@amd.com && !(sfdp->getFlags() & OS::TGT_O_NONBLOCK)) 278113570Sbrandon.potter@amd.com return SyscallReturn::retry(); 278213570Sbrandon.potter@amd.com 278313570Sbrandon.potter@amd.com if (lenPtr) { 278413570Sbrandon.potter@amd.com lenBufPtr = new BufferArg(lenPtr, sizeof(socklen_t)); 278514024Sgabeblack@google.com lenBufPtr->copyIn(tc->getVirtProxy()); 278613570Sbrandon.potter@amd.com memcpy(&addrLen, (socklen_t *)lenBufPtr->bufferPtr(), 278713570Sbrandon.potter@amd.com sizeof(socklen_t)); 278813570Sbrandon.potter@amd.com } 278913570Sbrandon.potter@amd.com 279013570Sbrandon.potter@amd.com if (addrPtr) { 279113570Sbrandon.potter@amd.com addrBufPtr = new BufferArg(addrPtr, sizeof(struct sockaddr)); 279214024Sgabeblack@google.com addrBufPtr->copyIn(tc->getVirtProxy()); 279313570Sbrandon.potter@amd.com memcpy(&sa, (struct sockaddr *)addrBufPtr->bufferPtr(), 279413570Sbrandon.potter@amd.com sizeof(struct sockaddr)); 279513570Sbrandon.potter@amd.com } 279613570Sbrandon.potter@amd.com 279713570Sbrandon.potter@amd.com host_fd = accept(sim_fd, &sa, &addrLen); 279813570Sbrandon.potter@amd.com 279913570Sbrandon.potter@amd.com if (host_fd == -1) 280013570Sbrandon.potter@amd.com return -errno; 280113570Sbrandon.potter@amd.com 280213570Sbrandon.potter@amd.com if (addrPtr) { 280313570Sbrandon.potter@amd.com memcpy(addrBufPtr->bufferPtr(), &sa, sizeof(sa)); 280414024Sgabeblack@google.com addrBufPtr->copyOut(tc->getVirtProxy()); 280513570Sbrandon.potter@amd.com delete(addrBufPtr); 280613570Sbrandon.potter@amd.com } 280713570Sbrandon.potter@amd.com 280813570Sbrandon.potter@amd.com if (lenPtr) { 280913570Sbrandon.potter@amd.com *(socklen_t *)lenBufPtr->bufferPtr() = addrLen; 281014024Sgabeblack@google.com lenBufPtr->copyOut(tc->getVirtProxy()); 281113570Sbrandon.potter@amd.com delete(lenBufPtr); 281213570Sbrandon.potter@amd.com } 281313570Sbrandon.potter@amd.com 281413570Sbrandon.potter@amd.com auto afdp = std::make_shared<SocketFDEntry>(host_fd, sfdp->_domain, 281513570Sbrandon.potter@amd.com sfdp->_type, sfdp->_protocol); 281613570Sbrandon.potter@amd.com return p->fds->allocFD(afdp); 281713570Sbrandon.potter@amd.com} 281813570Sbrandon.potter@amd.com 281913933Sbrandon.potter@amd.com/// Target eventfd() function. 282013933Sbrandon.potter@amd.comtemplate <class OS> 282113933Sbrandon.potter@amd.comSyscallReturn 282213995Sbrandon.potter@amd.comeventfdFunc(SyscallDesc *desc, int num, ThreadContext *tc) 282313933Sbrandon.potter@amd.com{ 282413936SAndrea.Mondelli@ucf.edu#if defined(__linux__) 282513933Sbrandon.potter@amd.com int index = 0; 282613995Sbrandon.potter@amd.com auto p = tc->getProcessPtr(); 282713933Sbrandon.potter@amd.com unsigned initval = p->getSyscallArg(tc, index); 282813933Sbrandon.potter@amd.com int in_flags = p->getSyscallArg(tc, index); 282913933Sbrandon.potter@amd.com 283013933Sbrandon.potter@amd.com int sim_fd = eventfd(initval, in_flags); 283113933Sbrandon.potter@amd.com if (sim_fd == -1) 283213933Sbrandon.potter@amd.com return -errno; 283313933Sbrandon.potter@amd.com 283413933Sbrandon.potter@amd.com bool cloexec = in_flags & OS::TGT_O_CLOEXEC; 283513933Sbrandon.potter@amd.com 283613933Sbrandon.potter@amd.com int flags = cloexec ? OS::TGT_O_CLOEXEC : 0; 283713933Sbrandon.potter@amd.com flags |= (in_flags & OS::TGT_O_NONBLOCK) ? OS::TGT_O_NONBLOCK : 0; 283813933Sbrandon.potter@amd.com 283913933Sbrandon.potter@amd.com auto hbfdp = std::make_shared<HBFDEntry>(flags, sim_fd, cloexec); 284013933Sbrandon.potter@amd.com int tgt_fd = p->fds->allocFD(hbfdp); 284113933Sbrandon.potter@amd.com return tgt_fd; 284213933Sbrandon.potter@amd.com#else 284313933Sbrandon.potter@amd.com warnUnsupportedOS("eventfd"); 284413933Sbrandon.potter@amd.com return -1; 284513933Sbrandon.potter@amd.com#endif 284613933Sbrandon.potter@amd.com} 284713933Sbrandon.potter@amd.com 28481354SN/A#endif // __SIM_SYSCALL_EMUL_HH__ 2849