syscall_emul.cc revision 11886
1360SN/A/* 21458SN/A * Copyright (c) 2003-2005 The Regents of The University of Michigan 3360SN/A * All rights reserved. 4360SN/A * 5360SN/A * Redistribution and use in source and binary forms, with or without 6360SN/A * modification, are permitted provided that the following conditions are 7360SN/A * met: redistributions of source code must retain the above copyright 8360SN/A * notice, this list of conditions and the following disclaimer; 9360SN/A * redistributions in binary form must reproduce the above copyright 10360SN/A * notice, this list of conditions and the following disclaimer in the 11360SN/A * documentation and/or other materials provided with the distribution; 12360SN/A * neither the name of the copyright holders nor the names of its 13360SN/A * contributors may be used to endorse or promote products derived from 14360SN/A * this software without specific prior written permission. 15360SN/A * 16360SN/A * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17360SN/A * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18360SN/A * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19360SN/A * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20360SN/A * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21360SN/A * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22360SN/A * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23360SN/A * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24360SN/A * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25360SN/A * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26360SN/A * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 272665Ssaidi@eecs.umich.edu * 282665Ssaidi@eecs.umich.edu * Authors: Steve Reinhardt 292665Ssaidi@eecs.umich.edu * Ali Saidi 30360SN/A */ 31360SN/A 3211793Sbrandon.potter@amd.com#include "sim/syscall_emul.hh" 3311793Sbrandon.potter@amd.com 342093SN/A#include <fcntl.h> 35360SN/A#include <unistd.h> 36360SN/A 376712Snate@binkert.org#include <iostream> 38360SN/A#include <string> 39360SN/A 407680Sgblack@eecs.umich.edu#include "arch/utility.hh" 412474SN/A#include "base/chunk_generator.hh" 42360SN/A#include "base/trace.hh" 436658Snate@binkert.org#include "config/the_isa.hh" 442680Sktlim@umich.edu#include "cpu/thread_context.hh" 452474SN/A#include "mem/page_table.hh" 46360SN/A#include "sim/process.hh" 478229Snate@binkert.org#include "sim/sim_exit.hh" 4811794Sbrandon.potter@amd.com#include "sim/syscall_debug_macros.hh" 4911794Sbrandon.potter@amd.com#include "sim/syscall_desc.hh" 506029Ssteve.reinhardt@amd.com#include "sim/system.hh" 51360SN/A 52360SN/Ausing namespace std; 532107SN/Ausing namespace TheISA; 54360SN/A 551450SN/ASyscallReturn 5611851Sbrandon.potter@amd.comunimplementedFunc(SyscallDesc *desc, int callnum, Process *process, 572680Sktlim@umich.edu ThreadContext *tc) 58360SN/A{ 5911794Sbrandon.potter@amd.com fatal("syscall %s (#%d) unimplemented.", desc->name(), callnum); 602484SN/A 612484SN/A return 1; 62360SN/A} 63360SN/A 64360SN/A 651450SN/ASyscallReturn 6611851Sbrandon.potter@amd.comignoreFunc(SyscallDesc *desc, int callnum, Process *process, 672680Sktlim@umich.edu ThreadContext *tc) 68360SN/A{ 6911794Sbrandon.potter@amd.com if (desc->needWarning()) { 7011794Sbrandon.potter@amd.com warn("ignoring syscall %s(...)%s", desc->name(), desc->warnOnce() ? 7111794Sbrandon.potter@amd.com "\n (further warnings will be suppressed)" : ""); 7210831Ssteve.reinhardt@amd.com } 73360SN/A 748149SChris.Emmons@ARM.com return 0; 758149SChris.Emmons@ARM.com} 768149SChris.Emmons@ARM.com 7711886Sbrandon.potter@amd.comstatic void 7811886Sbrandon.potter@amd.comexitFutexWake(ThreadContext *tc, uint64_t uaddr) 7911886Sbrandon.potter@amd.com{ 8011886Sbrandon.potter@amd.com std::map<uint64_t, std::list<ThreadContext *> * > 8111886Sbrandon.potter@amd.com &futex_map = tc->getSystemPtr()->futexMap; 8211886Sbrandon.potter@amd.com 8311886Sbrandon.potter@amd.com int wokenUp = 0; 8411886Sbrandon.potter@amd.com std::list<ThreadContext *> * tcWaitList; 8511886Sbrandon.potter@amd.com if (futex_map.count(uaddr)) { 8611886Sbrandon.potter@amd.com tcWaitList = futex_map.find(uaddr)->second; 8711886Sbrandon.potter@amd.com if (tcWaitList->size() > 0) { 8811886Sbrandon.potter@amd.com tcWaitList->front()->activate(); 8911886Sbrandon.potter@amd.com tcWaitList->pop_front(); 9011886Sbrandon.potter@amd.com wokenUp++; 9111886Sbrandon.potter@amd.com } 9211886Sbrandon.potter@amd.com if (tcWaitList->empty()) { 9311886Sbrandon.potter@amd.com futex_map.erase(uaddr); 9411886Sbrandon.potter@amd.com delete tcWaitList; 9511886Sbrandon.potter@amd.com } 9611886Sbrandon.potter@amd.com } 9711886Sbrandon.potter@amd.com DPRINTF(SyscallVerbose, "exit: FUTEX_WAKE, activated %d waiting " 9811886Sbrandon.potter@amd.com "thread contexts\n", wokenUp); 9911886Sbrandon.potter@amd.com} 1008149SChris.Emmons@ARM.com 1018149SChris.Emmons@ARM.comSyscallReturn 10211886Sbrandon.potter@amd.comexitFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 103360SN/A{ 10411886Sbrandon.potter@amd.com if (p->system->numRunningContexts() == 1 && !p->childClearTID) { 10511886Sbrandon.potter@amd.com // Last running free-parent context; exit simulator. 1066701Sgblack@eecs.umich.edu int index = 0; 1075958Sgblack@eecs.umich.edu exitSimLoop("target called exit()", 10811886Sbrandon.potter@amd.com p->getSyscallArg(tc, index) & 0xff); 1096029Ssteve.reinhardt@amd.com } else { 11011886Sbrandon.potter@amd.com if (p->childClearTID) 11111886Sbrandon.potter@amd.com exitFutexWake(tc, p->childClearTID); 1126029Ssteve.reinhardt@amd.com tc->halt(); 1132834Sksewell@umich.edu } 114360SN/A 1151458SN/A return 1; 116360SN/A} 117360SN/A 118360SN/A 1191450SN/ASyscallReturn 12011851Sbrandon.potter@amd.comexitGroupFunc(SyscallDesc *desc, int callnum, Process *process, 1216109Ssanchezd@stanford.edu ThreadContext *tc) 1226109Ssanchezd@stanford.edu{ 12310483Swiseveri@student.ethz.ch // halt all threads belonging to this process 12410483Swiseveri@student.ethz.ch for (auto i: process->contextIds) { 12510483Swiseveri@student.ethz.ch process->system->getThreadContext(i)->halt(); 12610483Swiseveri@student.ethz.ch } 12710483Swiseveri@student.ethz.ch 12810483Swiseveri@student.ethz.ch if (!process->system->numRunningContexts()) { 12910483Swiseveri@student.ethz.ch // all threads belonged to this process... exit simulator 13010483Swiseveri@student.ethz.ch int index = 0; 13110483Swiseveri@student.ethz.ch exitSimLoop("target called exit()", 13210483Swiseveri@student.ethz.ch process->getSyscallArg(tc, index) & 0xff); 13310483Swiseveri@student.ethz.ch } 1346109Ssanchezd@stanford.edu 1356109Ssanchezd@stanford.edu return 1; 1366109Ssanchezd@stanford.edu} 1376109Ssanchezd@stanford.edu 1386109Ssanchezd@stanford.edu 1396109Ssanchezd@stanford.eduSyscallReturn 14011851Sbrandon.potter@amd.comgetpagesizeFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 141360SN/A{ 14210318Sandreas.hansson@arm.com return (int)PageBytes; 143360SN/A} 144360SN/A 145360SN/A 1461450SN/ASyscallReturn 14711851Sbrandon.potter@amd.combrkFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 148360SN/A{ 149360SN/A // change brk addr to first arg 1506701Sgblack@eecs.umich.edu int index = 0; 1516701Sgblack@eecs.umich.edu Addr new_brk = p->getSyscallArg(tc, index); 1525748SSteve.Reinhardt@amd.com 1535748SSteve.Reinhardt@amd.com // in Linux at least, brk(0) returns the current break value 1545748SSteve.Reinhardt@amd.com // (note that the syscall and the glibc function have different behavior) 1555748SSteve.Reinhardt@amd.com if (new_brk == 0) 15611886Sbrandon.potter@amd.com return p->memState->brkPoint; 1575748SSteve.Reinhardt@amd.com 15811886Sbrandon.potter@amd.com if (new_brk > p->memState->brkPoint) { 1595748SSteve.Reinhardt@amd.com // might need to allocate some new pages 16011886Sbrandon.potter@amd.com for (ChunkGenerator gen(p->memState->brkPoint, 16111886Sbrandon.potter@amd.com new_brk - p->memState->brkPoint, 16210318Sandreas.hansson@arm.com PageBytes); !gen.done(); gen.next()) { 1635748SSteve.Reinhardt@amd.com if (!p->pTable->translate(gen.addr())) 16410318Sandreas.hansson@arm.com p->allocateMem(roundDown(gen.addr(), PageBytes), PageBytes); 1656687Stjones1@inf.ed.ac.uk 1666687Stjones1@inf.ed.ac.uk // if the address is already there, zero it out 1676687Stjones1@inf.ed.ac.uk else { 1686687Stjones1@inf.ed.ac.uk uint8_t zero = 0; 1698852Sandreas.hansson@arm.com SETranslatingPortProxy &tp = tc->getMemProxy(); 1706687Stjones1@inf.ed.ac.uk 1716687Stjones1@inf.ed.ac.uk // split non-page aligned accesses 17210318Sandreas.hansson@arm.com Addr next_page = roundUp(gen.addr(), PageBytes); 1736687Stjones1@inf.ed.ac.uk uint32_t size_needed = next_page - gen.addr(); 1748852Sandreas.hansson@arm.com tp.memsetBlob(gen.addr(), zero, size_needed); 17510318Sandreas.hansson@arm.com if (gen.addr() + PageBytes > next_page && 1766687Stjones1@inf.ed.ac.uk next_page < new_brk && 1776687Stjones1@inf.ed.ac.uk p->pTable->translate(next_page)) 1786687Stjones1@inf.ed.ac.uk { 17910318Sandreas.hansson@arm.com size_needed = PageBytes - size_needed; 1808852Sandreas.hansson@arm.com tp.memsetBlob(next_page, zero, size_needed); 1816687Stjones1@inf.ed.ac.uk } 1826687Stjones1@inf.ed.ac.uk } 1832474SN/A } 1841450SN/A } 1855748SSteve.Reinhardt@amd.com 18611886Sbrandon.potter@amd.com p->memState->brkPoint = new_brk; 18711380Salexandru.dutu@amd.com DPRINTF_SYSCALL(Verbose, "brk: break point changed to: %#X\n", 18811886Sbrandon.potter@amd.com p->memState->brkPoint); 18911886Sbrandon.potter@amd.com return p->memState->brkPoint; 190360SN/A} 191360SN/A 19211886Sbrandon.potter@amd.comSyscallReturn 19311886Sbrandon.potter@amd.comsetTidAddressFunc(SyscallDesc *desc, int callnum, Process *process, 19411886Sbrandon.potter@amd.com ThreadContext *tc) 19511886Sbrandon.potter@amd.com{ 19611886Sbrandon.potter@amd.com int index = 0; 19711886Sbrandon.potter@amd.com uint64_t tidPtr = process->getSyscallArg(tc, index); 19811886Sbrandon.potter@amd.com 19911886Sbrandon.potter@amd.com process->childClearTID = tidPtr; 20011886Sbrandon.potter@amd.com return process->pid(); 20111886Sbrandon.potter@amd.com} 202360SN/A 2031450SN/ASyscallReturn 20411851Sbrandon.potter@amd.comcloseFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 205360SN/A{ 2066701Sgblack@eecs.umich.edu int index = 0; 20710931Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 20810931Sbrandon.potter@amd.com 20911856Sbrandon.potter@amd.com return p->fds->closeFDEntry(tgt_fd); 210360SN/A} 211360SN/A 212360SN/A 2131450SN/ASyscallReturn 21411851Sbrandon.potter@amd.comreadFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 215360SN/A{ 2166701Sgblack@eecs.umich.edu int index = 0; 21710931Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 2186701Sgblack@eecs.umich.edu Addr bufPtr = p->getSyscallArg(tc, index); 2196701Sgblack@eecs.umich.edu int nbytes = p->getSyscallArg(tc, index); 22011856Sbrandon.potter@amd.com 22111856Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 22211856Sbrandon.potter@amd.com if (!hbfdp) 22311856Sbrandon.potter@amd.com return -EBADF; 22411856Sbrandon.potter@amd.com int sim_fd = hbfdp->getSimFD(); 22511856Sbrandon.potter@amd.com 2266701Sgblack@eecs.umich.edu BufferArg bufArg(bufPtr, nbytes); 22710931Sbrandon.potter@amd.com int bytes_read = read(sim_fd, bufArg.bufferPtr(), nbytes); 228360SN/A 22911684Snderumigny@gmail.com if (bytes_read > 0) 2308706Sandreas.hansson@arm.com bufArg.copyOut(tc->getMemProxy()); 231360SN/A 2321458SN/A return bytes_read; 233360SN/A} 234360SN/A 2351450SN/ASyscallReturn 23611851Sbrandon.potter@amd.comwriteFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 237360SN/A{ 2386701Sgblack@eecs.umich.edu int index = 0; 23910931Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 2406701Sgblack@eecs.umich.edu Addr bufPtr = p->getSyscallArg(tc, index); 2416701Sgblack@eecs.umich.edu int nbytes = p->getSyscallArg(tc, index); 24211856Sbrandon.potter@amd.com 24311856Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 24411856Sbrandon.potter@amd.com if (!hbfdp) 24511856Sbrandon.potter@amd.com return -EBADF; 24611856Sbrandon.potter@amd.com int sim_fd = hbfdp->getSimFD(); 24711856Sbrandon.potter@amd.com 2486701Sgblack@eecs.umich.edu BufferArg bufArg(bufPtr, nbytes); 2498706Sandreas.hansson@arm.com bufArg.copyIn(tc->getMemProxy()); 250360SN/A 25110931Sbrandon.potter@amd.com int bytes_written = write(sim_fd, bufArg.bufferPtr(), nbytes); 252360SN/A 25310931Sbrandon.potter@amd.com fsync(sim_fd); 254360SN/A 2551458SN/A return bytes_written; 256360SN/A} 257360SN/A 258360SN/A 2591450SN/ASyscallReturn 26011851Sbrandon.potter@amd.comlseekFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 261360SN/A{ 2626701Sgblack@eecs.umich.edu int index = 0; 26310931Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 2646701Sgblack@eecs.umich.edu uint64_t offs = p->getSyscallArg(tc, index); 2656701Sgblack@eecs.umich.edu int whence = p->getSyscallArg(tc, index); 266360SN/A 26711856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 26811856Sbrandon.potter@amd.com if (!ffdp) 26910931Sbrandon.potter@amd.com return -EBADF; 27011856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 27110931Sbrandon.potter@amd.com 27210931Sbrandon.potter@amd.com off_t result = lseek(sim_fd, offs, whence); 273360SN/A 2741458SN/A return (result == (off_t)-1) ? -errno : result; 275360SN/A} 276360SN/A 277360SN/A 2781450SN/ASyscallReturn 27911851Sbrandon.potter@amd.com_llseekFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 2804118Sgblack@eecs.umich.edu{ 2816701Sgblack@eecs.umich.edu int index = 0; 28210931Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 2836701Sgblack@eecs.umich.edu uint64_t offset_high = p->getSyscallArg(tc, index); 2846701Sgblack@eecs.umich.edu uint32_t offset_low = p->getSyscallArg(tc, index); 2856701Sgblack@eecs.umich.edu Addr result_ptr = p->getSyscallArg(tc, index); 2866701Sgblack@eecs.umich.edu int whence = p->getSyscallArg(tc, index); 2874118Sgblack@eecs.umich.edu 28811856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 28911856Sbrandon.potter@amd.com if (!ffdp) 29010931Sbrandon.potter@amd.com return -EBADF; 29111856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 29210931Sbrandon.potter@amd.com 2934118Sgblack@eecs.umich.edu uint64_t offset = (offset_high << 32) | offset_low; 2944118Sgblack@eecs.umich.edu 29510931Sbrandon.potter@amd.com uint64_t result = lseek(sim_fd, offset, whence); 2964118Sgblack@eecs.umich.edu result = TheISA::htog(result); 2974118Sgblack@eecs.umich.edu 29811379Sbrandon.potter@amd.com if (result == (off_t)-1) 2994118Sgblack@eecs.umich.edu return -errno; 30011379Sbrandon.potter@amd.com // Assuming that the size of loff_t is 64 bits on the target platform 30111379Sbrandon.potter@amd.com BufferArg result_buf(result_ptr, sizeof(result)); 30211379Sbrandon.potter@amd.com memcpy(result_buf.bufferPtr(), &result, sizeof(result)); 30311379Sbrandon.potter@amd.com result_buf.copyOut(tc->getMemProxy()); 30411379Sbrandon.potter@amd.com return 0; 3054118Sgblack@eecs.umich.edu} 3064118Sgblack@eecs.umich.edu 3074118Sgblack@eecs.umich.edu 3084118Sgblack@eecs.umich.eduSyscallReturn 30911851Sbrandon.potter@amd.communmapFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 310360SN/A{ 31111383Sbrandon.potter@amd.com // With mmap more fully implemented, it might be worthwhile to bite 31211383Sbrandon.potter@amd.com // the bullet and implement munmap. Should allow us to reuse simulated 31311383Sbrandon.potter@amd.com // memory. 3141458SN/A return 0; 315360SN/A} 316360SN/A 317360SN/A 318360SN/Aconst char *hostname = "m5.eecs.umich.edu"; 319360SN/A 3201450SN/ASyscallReturn 32111851Sbrandon.potter@amd.comgethostnameFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 322360SN/A{ 3236701Sgblack@eecs.umich.edu int index = 0; 3246701Sgblack@eecs.umich.edu Addr bufPtr = p->getSyscallArg(tc, index); 3256701Sgblack@eecs.umich.edu int name_len = p->getSyscallArg(tc, index); 3266701Sgblack@eecs.umich.edu BufferArg name(bufPtr, name_len); 327360SN/A 328360SN/A strncpy((char *)name.bufferPtr(), hostname, name_len); 329360SN/A 3308706Sandreas.hansson@arm.com name.copyOut(tc->getMemProxy()); 331360SN/A 3321458SN/A return 0; 333360SN/A} 334360SN/A 3351450SN/ASyscallReturn 33611851Sbrandon.potter@amd.comgetcwdFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 3375513SMichael.Adler@intel.com{ 3385513SMichael.Adler@intel.com int result = 0; 3396731Svince@csl.cornell.edu int index = 0; 3406701Sgblack@eecs.umich.edu Addr bufPtr = p->getSyscallArg(tc, index); 3416701Sgblack@eecs.umich.edu unsigned long size = p->getSyscallArg(tc, index); 3426701Sgblack@eecs.umich.edu BufferArg buf(bufPtr, size); 3435513SMichael.Adler@intel.com 3445513SMichael.Adler@intel.com // Is current working directory defined? 3455513SMichael.Adler@intel.com string cwd = p->getcwd(); 3465513SMichael.Adler@intel.com if (!cwd.empty()) { 3475513SMichael.Adler@intel.com if (cwd.length() >= size) { 3485513SMichael.Adler@intel.com // Buffer too small 3495513SMichael.Adler@intel.com return -ERANGE; 3505513SMichael.Adler@intel.com } 3515513SMichael.Adler@intel.com strncpy((char *)buf.bufferPtr(), cwd.c_str(), size); 3525513SMichael.Adler@intel.com result = cwd.length(); 35310955Sdavid.hashe@amd.com } else { 35411856Sbrandon.potter@amd.com if (getcwd((char *)buf.bufferPtr(), size)) { 3555513SMichael.Adler@intel.com result = strlen((char *)buf.bufferPtr()); 35610955Sdavid.hashe@amd.com } else { 3575513SMichael.Adler@intel.com result = -1; 3585513SMichael.Adler@intel.com } 3595513SMichael.Adler@intel.com } 3605513SMichael.Adler@intel.com 3618706Sandreas.hansson@arm.com buf.copyOut(tc->getMemProxy()); 3625513SMichael.Adler@intel.com 3635513SMichael.Adler@intel.com return (result == -1) ? -errno : result; 3645513SMichael.Adler@intel.com} 3655513SMichael.Adler@intel.com 36610203SAli.Saidi@ARM.com/// Target open() handler. 36710203SAli.Saidi@ARM.comSyscallReturn 36811851Sbrandon.potter@amd.comreadlinkFunc(SyscallDesc *desc, int callnum, Process *process, 36911851Sbrandon.potter@amd.com ThreadContext *tc) 37010203SAli.Saidi@ARM.com{ 37110203SAli.Saidi@ARM.com return readlinkFunc(desc, callnum, process, tc, 0); 37210203SAli.Saidi@ARM.com} 3735513SMichael.Adler@intel.com 3745513SMichael.Adler@intel.comSyscallReturn 37511851Sbrandon.potter@amd.comreadlinkFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc, 37611851Sbrandon.potter@amd.com int index) 3775513SMichael.Adler@intel.com{ 3785513SMichael.Adler@intel.com string path; 3795513SMichael.Adler@intel.com 3808852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, p->getSyscallArg(tc, index))) 38110223Ssteve.reinhardt@amd.com return -EFAULT; 3825513SMichael.Adler@intel.com 3835513SMichael.Adler@intel.com // Adjust path for current working directory 3845513SMichael.Adler@intel.com path = p->fullPath(path); 3855513SMichael.Adler@intel.com 3866701Sgblack@eecs.umich.edu Addr bufPtr = p->getSyscallArg(tc, index); 3876701Sgblack@eecs.umich.edu size_t bufsiz = p->getSyscallArg(tc, index); 3886701Sgblack@eecs.umich.edu 3896701Sgblack@eecs.umich.edu BufferArg buf(bufPtr, bufsiz); 3905513SMichael.Adler@intel.com 39110955Sdavid.hashe@amd.com int result = -1; 39210955Sdavid.hashe@amd.com if (path != "/proc/self/exe") { 39310955Sdavid.hashe@amd.com result = readlink(path.c_str(), (char *)buf.bufferPtr(), bufsiz); 39410955Sdavid.hashe@amd.com } else { 39511140Sjthestness@gmail.com // Emulate readlink() called on '/proc/self/exe' should return the 39611140Sjthestness@gmail.com // absolute path of the binary running in the simulated system (the 39711851Sbrandon.potter@amd.com // Process' executable). It is possible that using this path in 39811140Sjthestness@gmail.com // the simulated system will result in unexpected behavior if: 39911140Sjthestness@gmail.com // 1) One binary runs another (e.g., -c time -o "my_binary"), and 40011140Sjthestness@gmail.com // called binary calls readlink(). 40111140Sjthestness@gmail.com // 2) The host's full path to the running benchmark changes from one 40211140Sjthestness@gmail.com // simulation to another. This can result in different simulated 40311140Sjthestness@gmail.com // performance since the simulated system will process the binary 40411140Sjthestness@gmail.com // path differently, even if the binary itself does not change. 40511140Sjthestness@gmail.com 40611140Sjthestness@gmail.com // Get the absolute canonical path to the running application 40711140Sjthestness@gmail.com char real_path[PATH_MAX]; 40811140Sjthestness@gmail.com char *check_real_path = realpath(p->progName(), real_path); 40911140Sjthestness@gmail.com if (!check_real_path) { 41011140Sjthestness@gmail.com fatal("readlink('/proc/self/exe') unable to resolve path to " 41111140Sjthestness@gmail.com "executable: %s", p->progName()); 41211140Sjthestness@gmail.com } 41311140Sjthestness@gmail.com strncpy((char*)buf.bufferPtr(), real_path, bufsiz); 41411140Sjthestness@gmail.com size_t real_path_len = strlen(real_path); 41511140Sjthestness@gmail.com if (real_path_len > bufsiz) { 41610955Sdavid.hashe@amd.com // readlink will truncate the contents of the 41710955Sdavid.hashe@amd.com // path to ensure it is no more than bufsiz 41810955Sdavid.hashe@amd.com result = bufsiz; 41910955Sdavid.hashe@amd.com } else { 42011140Sjthestness@gmail.com result = real_path_len; 42110955Sdavid.hashe@amd.com } 42211140Sjthestness@gmail.com 42311140Sjthestness@gmail.com // Issue a warning about potential unexpected results 42411140Sjthestness@gmail.com warn_once("readlink() called on '/proc/self/exe' may yield unexpected " 42511140Sjthestness@gmail.com "results in various settings.\n Returning '%s'\n", 42611140Sjthestness@gmail.com (char*)buf.bufferPtr()); 42710955Sdavid.hashe@amd.com } 4285513SMichael.Adler@intel.com 4298706Sandreas.hansson@arm.com buf.copyOut(tc->getMemProxy()); 4305513SMichael.Adler@intel.com 4315513SMichael.Adler@intel.com return (result == -1) ? -errno : result; 4325513SMichael.Adler@intel.com} 4335513SMichael.Adler@intel.com 4345513SMichael.Adler@intel.comSyscallReturn 43511851Sbrandon.potter@amd.comunlinkFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 436511SN/A{ 43710633Smichaelupton@gmail.com return unlinkHelper(desc, num, p, tc, 0); 43810633Smichaelupton@gmail.com} 43910633Smichaelupton@gmail.com 44010633Smichaelupton@gmail.comSyscallReturn 44111851Sbrandon.potter@amd.comunlinkHelper(SyscallDesc *desc, int num, Process *p, ThreadContext *tc, 44211851Sbrandon.potter@amd.com int index) 44310633Smichaelupton@gmail.com{ 4441706SN/A string path; 445360SN/A 4468852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, p->getSyscallArg(tc, index))) 44710223Ssteve.reinhardt@amd.com return -EFAULT; 448511SN/A 4493669Sbinkertn@umich.edu // Adjust path for current working directory 4503669Sbinkertn@umich.edu path = p->fullPath(path); 4513669Sbinkertn@umich.edu 452511SN/A int result = unlink(path.c_str()); 4531458SN/A return (result == -1) ? -errno : result; 454511SN/A} 455511SN/A 4565513SMichael.Adler@intel.com 4575513SMichael.Adler@intel.comSyscallReturn 45811851Sbrandon.potter@amd.commkdirFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 4595513SMichael.Adler@intel.com{ 4605513SMichael.Adler@intel.com string path; 4615513SMichael.Adler@intel.com 4626701Sgblack@eecs.umich.edu int index = 0; 4638852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, p->getSyscallArg(tc, index))) 46410223Ssteve.reinhardt@amd.com return -EFAULT; 4655513SMichael.Adler@intel.com 4665513SMichael.Adler@intel.com // Adjust path for current working directory 4675513SMichael.Adler@intel.com path = p->fullPath(path); 4685513SMichael.Adler@intel.com 4696701Sgblack@eecs.umich.edu mode_t mode = p->getSyscallArg(tc, index); 4705513SMichael.Adler@intel.com 4715513SMichael.Adler@intel.com int result = mkdir(path.c_str(), mode); 4725513SMichael.Adler@intel.com return (result == -1) ? -errno : result; 4735513SMichael.Adler@intel.com} 4745513SMichael.Adler@intel.com 4751450SN/ASyscallReturn 47611851Sbrandon.potter@amd.comrenameFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 477511SN/A{ 4781706SN/A string old_name; 479511SN/A 4806701Sgblack@eecs.umich.edu int index = 0; 4818852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(old_name, p->getSyscallArg(tc, index))) 4821458SN/A return -EFAULT; 483511SN/A 4841706SN/A string new_name; 485511SN/A 4868852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(new_name, p->getSyscallArg(tc, index))) 4871458SN/A return -EFAULT; 488511SN/A 4893669Sbinkertn@umich.edu // Adjust path for current working directory 4903669Sbinkertn@umich.edu old_name = p->fullPath(old_name); 4913669Sbinkertn@umich.edu new_name = p->fullPath(new_name); 4923669Sbinkertn@umich.edu 4931706SN/A int64_t result = rename(old_name.c_str(), new_name.c_str()); 4941458SN/A return (result == -1) ? -errno : result; 495511SN/A} 496511SN/A 4971706SN/ASyscallReturn 49811851Sbrandon.potter@amd.comtruncateFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 4991706SN/A{ 5001706SN/A string path; 5011706SN/A 5026701Sgblack@eecs.umich.edu int index = 0; 5038852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, p->getSyscallArg(tc, index))) 5041706SN/A return -EFAULT; 5051706SN/A 5066701Sgblack@eecs.umich.edu off_t length = p->getSyscallArg(tc, index); 5071706SN/A 5083669Sbinkertn@umich.edu // Adjust path for current working directory 5093669Sbinkertn@umich.edu path = p->fullPath(path); 5103669Sbinkertn@umich.edu 5111706SN/A int result = truncate(path.c_str(), length); 5121706SN/A return (result == -1) ? -errno : result; 5131706SN/A} 5141706SN/A 5151706SN/ASyscallReturn 51611856Sbrandon.potter@amd.comftruncateFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 5171706SN/A{ 5186701Sgblack@eecs.umich.edu int index = 0; 51911856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 52011856Sbrandon.potter@amd.com off_t length = p->getSyscallArg(tc, index); 5211706SN/A 52211856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 52311856Sbrandon.potter@amd.com if (!ffdp) 5241706SN/A return -EBADF; 52511856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 5261706SN/A 52710931Sbrandon.potter@amd.com int result = ftruncate(sim_fd, length); 5281706SN/A return (result == -1) ? -errno : result; 5291706SN/A} 5301999SN/A 5311999SN/ASyscallReturn 5326703Svince@csl.cornell.edutruncate64Func(SyscallDesc *desc, int num, 53311851Sbrandon.potter@amd.com Process *process, ThreadContext *tc) 5346703Svince@csl.cornell.edu{ 5356703Svince@csl.cornell.edu int index = 0; 5366703Svince@csl.cornell.edu string path; 5376703Svince@csl.cornell.edu 5388852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, process->getSyscallArg(tc, index))) 5396703Svince@csl.cornell.edu return -EFAULT; 5406703Svince@csl.cornell.edu 5416744SAli.Saidi@arm.com int64_t length = process->getSyscallArg(tc, index, 64); 5426703Svince@csl.cornell.edu 5436703Svince@csl.cornell.edu // Adjust path for current working directory 5446703Svince@csl.cornell.edu path = process->fullPath(path); 5456703Svince@csl.cornell.edu 5466744SAli.Saidi@arm.com#if NO_STAT64 5476744SAli.Saidi@arm.com int result = truncate(path.c_str(), length); 5486744SAli.Saidi@arm.com#else 5496703Svince@csl.cornell.edu int result = truncate64(path.c_str(), length); 5506744SAli.Saidi@arm.com#endif 5516703Svince@csl.cornell.edu return (result == -1) ? -errno : result; 5526703Svince@csl.cornell.edu} 5536703Svince@csl.cornell.edu 5546703Svince@csl.cornell.eduSyscallReturn 55511856Sbrandon.potter@amd.comftruncate64Func(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 5566685Stjones1@inf.ed.ac.uk{ 5576701Sgblack@eecs.umich.edu int index = 0; 55811856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 55911856Sbrandon.potter@amd.com int64_t length = p->getSyscallArg(tc, index, 64); 5606685Stjones1@inf.ed.ac.uk 56111856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 56211856Sbrandon.potter@amd.com if (!ffdp) 5636685Stjones1@inf.ed.ac.uk return -EBADF; 56411856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 5656685Stjones1@inf.ed.ac.uk 5666744SAli.Saidi@arm.com#if NO_STAT64 56710931Sbrandon.potter@amd.com int result = ftruncate(sim_fd, length); 5686744SAli.Saidi@arm.com#else 56910931Sbrandon.potter@amd.com int result = ftruncate64(sim_fd, length); 5706744SAli.Saidi@arm.com#endif 5716685Stjones1@inf.ed.ac.uk return (result == -1) ? -errno : result; 5726685Stjones1@inf.ed.ac.uk} 5736685Stjones1@inf.ed.ac.uk 5746685Stjones1@inf.ed.ac.ukSyscallReturn 57511851Sbrandon.potter@amd.comumaskFunc(SyscallDesc *desc, int num, Process *process, ThreadContext *tc) 5765513SMichael.Adler@intel.com{ 5775513SMichael.Adler@intel.com // Letting the simulated program change the simulator's umask seems like 5785513SMichael.Adler@intel.com // a bad idea. Compromise by just returning the current umask but not 5795513SMichael.Adler@intel.com // changing anything. 5805513SMichael.Adler@intel.com mode_t oldMask = umask(0); 5815513SMichael.Adler@intel.com umask(oldMask); 5825521Snate@binkert.org return (int)oldMask; 5835513SMichael.Adler@intel.com} 5845513SMichael.Adler@intel.com 5855513SMichael.Adler@intel.comSyscallReturn 58611851Sbrandon.potter@amd.comchownFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 5871999SN/A{ 5881999SN/A string path; 5891999SN/A 5906701Sgblack@eecs.umich.edu int index = 0; 5918852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, p->getSyscallArg(tc, index))) 5921999SN/A return -EFAULT; 5931999SN/A 5941999SN/A /* XXX endianess */ 5956701Sgblack@eecs.umich.edu uint32_t owner = p->getSyscallArg(tc, index); 5961999SN/A uid_t hostOwner = owner; 5976701Sgblack@eecs.umich.edu uint32_t group = p->getSyscallArg(tc, index); 5981999SN/A gid_t hostGroup = group; 5991999SN/A 6003669Sbinkertn@umich.edu // Adjust path for current working directory 6013669Sbinkertn@umich.edu path = p->fullPath(path); 6023669Sbinkertn@umich.edu 6031999SN/A int result = chown(path.c_str(), hostOwner, hostGroup); 6041999SN/A return (result == -1) ? -errno : result; 6051999SN/A} 6061999SN/A 6071999SN/ASyscallReturn 60811856Sbrandon.potter@amd.comfchownFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 6091999SN/A{ 6106701Sgblack@eecs.umich.edu int index = 0; 61111856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 6121999SN/A 61311856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 61411856Sbrandon.potter@amd.com if (!ffdp) 6151999SN/A return -EBADF; 61611856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 6171999SN/A 6181999SN/A /* XXX endianess */ 61911856Sbrandon.potter@amd.com uint32_t owner = p->getSyscallArg(tc, index); 6201999SN/A uid_t hostOwner = owner; 62111856Sbrandon.potter@amd.com uint32_t group = p->getSyscallArg(tc, index); 6221999SN/A gid_t hostGroup = group; 6231999SN/A 62410931Sbrandon.potter@amd.com int result = fchown(sim_fd, hostOwner, hostGroup); 6251999SN/A return (result == -1) ? -errno : result; 6261999SN/A} 6272093SN/A 6282093SN/A 62911856Sbrandon.potter@amd.com/** 63011856Sbrandon.potter@amd.com * TODO: there's a bit more involved here since file descriptors created with 63111856Sbrandon.potter@amd.com * dup are supposed to share a file description. So, there is a problem with 63211856Sbrandon.potter@amd.com * maintaining fields like file offset or flags since an update to such a 63311856Sbrandon.potter@amd.com * field won't be reflected in the metadata for the fd entries that we 63411856Sbrandon.potter@amd.com * maintain to hold metadata for checkpoint restoration. 63511856Sbrandon.potter@amd.com */ 6362093SN/ASyscallReturn 63711856Sbrandon.potter@amd.comdupFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 6383079Sstever@eecs.umich.edu{ 6396701Sgblack@eecs.umich.edu int index = 0; 64011856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 64110931Sbrandon.potter@amd.com 64211856Sbrandon.potter@amd.com auto old_hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 64311856Sbrandon.potter@amd.com if (!old_hbfdp) 6443079Sstever@eecs.umich.edu return -EBADF; 64511856Sbrandon.potter@amd.com int sim_fd = old_hbfdp->getSimFD(); 6465282Srstrong@cs.ucsd.edu 64710781Snilay@cs.wisc.edu int result = dup(sim_fd); 64811856Sbrandon.potter@amd.com int local_errno = errno; 64911856Sbrandon.potter@amd.com 65011856Sbrandon.potter@amd.com std::shared_ptr<FDEntry> new_fdep = old_hbfdp->clone(); 65111856Sbrandon.potter@amd.com auto new_hbfdp = std::dynamic_pointer_cast<HBFDEntry>(new_fdep); 65211856Sbrandon.potter@amd.com new_hbfdp->setSimFD(result); 65311856Sbrandon.potter@amd.com 65411856Sbrandon.potter@amd.com return (result == -1) ? -local_errno : p->fds->allocFD(new_fdep); 6553079Sstever@eecs.umich.edu} 6563079Sstever@eecs.umich.edu 6573079Sstever@eecs.umich.eduSyscallReturn 65811856Sbrandon.potter@amd.comfcntlFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 6592093SN/A{ 66011875Sbrandon.potter@amd.com int arg; 6616701Sgblack@eecs.umich.edu int index = 0; 66211856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 66311875Sbrandon.potter@amd.com int cmd = p->getSyscallArg(tc, index); 6642093SN/A 66511856Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 66611856Sbrandon.potter@amd.com if (!hbfdp) 6672093SN/A return -EBADF; 66811856Sbrandon.potter@amd.com int sim_fd = hbfdp->getSimFD(); 6692093SN/A 67011875Sbrandon.potter@amd.com int coe = hbfdp->getCOE(); 67111875Sbrandon.potter@amd.com 6722093SN/A switch (cmd) { 67311875Sbrandon.potter@amd.com case F_GETFD: 67411875Sbrandon.potter@amd.com return coe & FD_CLOEXEC; 6752093SN/A 67611875Sbrandon.potter@amd.com case F_SETFD: { 67711875Sbrandon.potter@amd.com arg = p->getSyscallArg(tc, index); 67811875Sbrandon.potter@amd.com arg ? hbfdp->setCOE(true) : hbfdp->setCOE(false); 6792093SN/A return 0; 68011875Sbrandon.potter@amd.com } 6812093SN/A 68211875Sbrandon.potter@amd.com // Rely on the host to maintain the file status flags for this file 68311875Sbrandon.potter@amd.com // description rather than maintain it ourselves. Admittedly, this 68411875Sbrandon.potter@amd.com // is suboptimal (and possibly error prone), but it is difficult to 68511875Sbrandon.potter@amd.com // maintain the flags by tracking them across the different descriptors 68611875Sbrandon.potter@amd.com // (that refer to this file description) caused by clone, dup, and 68711875Sbrandon.potter@amd.com // subsequent fcntls. 68811875Sbrandon.potter@amd.com case F_GETFL: 68911875Sbrandon.potter@amd.com case F_SETFL: { 69011875Sbrandon.potter@amd.com arg = p->getSyscallArg(tc, index); 69111875Sbrandon.potter@amd.com int rv = fcntl(sim_fd, cmd, arg); 69211875Sbrandon.potter@amd.com return (rv == -1) ? -errno : rv; 69311875Sbrandon.potter@amd.com } 6942093SN/A 6952093SN/A default: 69611875Sbrandon.potter@amd.com warn("fcntl: unsupported command %d\n", cmd); 6972093SN/A return 0; 6982093SN/A } 6992093SN/A} 7002093SN/A 7012238SN/ASyscallReturn 70211856Sbrandon.potter@amd.comfcntl64Func(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 7032687Sksewell@umich.edu{ 7046701Sgblack@eecs.umich.edu int index = 0; 70511856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 7062687Sksewell@umich.edu 70711856Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 70811856Sbrandon.potter@amd.com if (!hbfdp) 7092687Sksewell@umich.edu return -EBADF; 71011856Sbrandon.potter@amd.com int sim_fd = hbfdp->getSimFD(); 7112687Sksewell@umich.edu 71211856Sbrandon.potter@amd.com int cmd = p->getSyscallArg(tc, index); 7132687Sksewell@umich.edu switch (cmd) { 7142687Sksewell@umich.edu case 33: //F_GETLK64 71510931Sbrandon.potter@amd.com warn("fcntl64(%d, F_GETLK64) not supported, error returned\n", tgt_fd); 7162687Sksewell@umich.edu return -EMFILE; 7172687Sksewell@umich.edu 7182687Sksewell@umich.edu case 34: // F_SETLK64 7192687Sksewell@umich.edu case 35: // F_SETLKW64 72010931Sbrandon.potter@amd.com warn("fcntl64(%d, F_SETLK(W)64) not supported, error returned\n", 72110931Sbrandon.potter@amd.com tgt_fd); 7222687Sksewell@umich.edu return -EMFILE; 7232687Sksewell@umich.edu 7242687Sksewell@umich.edu default: 7252687Sksewell@umich.edu // not sure if this is totally valid, but we'll pass it through 7262687Sksewell@umich.edu // to the underlying OS 72710931Sbrandon.potter@amd.com warn("fcntl64(%d, %d) passed through to host\n", tgt_fd, cmd); 72810931Sbrandon.potter@amd.com return fcntl(sim_fd, cmd); 7292687Sksewell@umich.edu // return 0; 7302687Sksewell@umich.edu } 7312687Sksewell@umich.edu} 7322687Sksewell@umich.edu 7332687Sksewell@umich.eduSyscallReturn 73411851Sbrandon.potter@amd.compipePseudoFunc(SyscallDesc *desc, int callnum, Process *process, 73511851Sbrandon.potter@amd.com ThreadContext *tc) 7362238SN/A{ 73711856Sbrandon.potter@amd.com int sim_fds[2], tgt_fds[2]; 7382093SN/A 73911856Sbrandon.potter@amd.com int pipe_retval = pipe(sim_fds); 74011856Sbrandon.potter@amd.com if (pipe_retval < 0) 7412238SN/A return pipe_retval; 7422238SN/A 74311856Sbrandon.potter@amd.com auto rend = PipeFDEntry::EndType::read; 74411856Sbrandon.potter@amd.com auto rpfd = std::make_shared<PipeFDEntry>(sim_fds[0], O_WRONLY, rend); 7452238SN/A 74611856Sbrandon.potter@amd.com auto wend = PipeFDEntry::EndType::write; 74711856Sbrandon.potter@amd.com auto wpfd = std::make_shared<PipeFDEntry>(sim_fds[1], O_RDONLY, wend); 74811856Sbrandon.potter@amd.com 74911856Sbrandon.potter@amd.com tgt_fds[0] = process->fds->allocFD(rpfd); 75011856Sbrandon.potter@amd.com tgt_fds[1] = process->fds->allocFD(wpfd); 75111856Sbrandon.potter@amd.com 75211856Sbrandon.potter@amd.com /** 75311856Sbrandon.potter@amd.com * Now patch the read object to record the target file descriptor chosen 75411856Sbrandon.potter@amd.com * as the write end of the pipe. 75511856Sbrandon.potter@amd.com */ 75611856Sbrandon.potter@amd.com rpfd->setPipeReadSource(tgt_fds[1]); 75711856Sbrandon.potter@amd.com 75811856Sbrandon.potter@amd.com /** 75911856Sbrandon.potter@amd.com * Alpha Linux convention for pipe() is that fd[0] is returned as 76011856Sbrandon.potter@amd.com * the return value of the function, and fd[1] is returned in r20. 76111856Sbrandon.potter@amd.com */ 76211856Sbrandon.potter@amd.com tc->setIntReg(SyscallPseudoReturnReg, tgt_fds[1]); 7632238SN/A return sim_fds[0]; 7642238SN/A} 7652238SN/A 76611885Sbrandon.potter@amd.comSyscallReturn 76711885Sbrandon.potter@amd.comsetpgidFunc(SyscallDesc *desc, int callnum, Process *process, 76811885Sbrandon.potter@amd.com ThreadContext *tc) 76911885Sbrandon.potter@amd.com{ 77011885Sbrandon.potter@amd.com int index = 0; 77111885Sbrandon.potter@amd.com int pid = process->getSyscallArg(tc, index); 77211885Sbrandon.potter@amd.com int pgid = process->getSyscallArg(tc, index); 77311885Sbrandon.potter@amd.com 77411885Sbrandon.potter@amd.com if (pgid < 0) 77511885Sbrandon.potter@amd.com return -EINVAL; 77611885Sbrandon.potter@amd.com 77711885Sbrandon.potter@amd.com if (pid == 0) { 77811885Sbrandon.potter@amd.com process->setpgid(process->pid()); 77911885Sbrandon.potter@amd.com return 0; 78011885Sbrandon.potter@amd.com } 78111885Sbrandon.potter@amd.com 78211885Sbrandon.potter@amd.com Process *matched_ph = NULL; 78311885Sbrandon.potter@amd.com System *sysh = tc->getSystemPtr(); 78411885Sbrandon.potter@amd.com 78511885Sbrandon.potter@amd.com // Retrieves process pointer from active/suspended thread contexts. 78611885Sbrandon.potter@amd.com for (int i = 0; i < sysh->numContexts(); i++) { 78711885Sbrandon.potter@amd.com if (sysh->threadContexts[i]->status() != ThreadContext::Halted) { 78811885Sbrandon.potter@amd.com Process *temp_h = sysh->threadContexts[i]->getProcessPtr(); 78911885Sbrandon.potter@amd.com Process *walk_ph = (Process*)temp_h; 79011885Sbrandon.potter@amd.com 79111885Sbrandon.potter@amd.com if (walk_ph && walk_ph->pid() == process->pid()) 79211885Sbrandon.potter@amd.com matched_ph = walk_ph; 79311885Sbrandon.potter@amd.com } 79411885Sbrandon.potter@amd.com } 79511885Sbrandon.potter@amd.com 79611885Sbrandon.potter@amd.com assert(matched_ph != NULL); 79711885Sbrandon.potter@amd.com matched_ph->setpgid((pgid == 0) ? matched_ph->pid() : pgid); 79811885Sbrandon.potter@amd.com 79911885Sbrandon.potter@amd.com return 0; 80011885Sbrandon.potter@amd.com} 8012238SN/A 8022238SN/ASyscallReturn 80311851Sbrandon.potter@amd.comgetpidPseudoFunc(SyscallDesc *desc, int callnum, Process *process, 80411851Sbrandon.potter@amd.com ThreadContext *tc) 8052238SN/A{ 8062238SN/A // Make up a PID. There's no interprocess communication in 8072238SN/A // fake_syscall mode, so there's no way for a process to know it's 8082238SN/A // not getting a unique value. 8092238SN/A 8103114Sgblack@eecs.umich.edu tc->setIntReg(SyscallPseudoReturnReg, process->ppid()); 8113114Sgblack@eecs.umich.edu return process->pid(); 8122238SN/A} 8132238SN/A 8142238SN/A 8152238SN/ASyscallReturn 81611851Sbrandon.potter@amd.comgetuidPseudoFunc(SyscallDesc *desc, int callnum, Process *process, 81711851Sbrandon.potter@amd.com ThreadContext *tc) 8182238SN/A{ 8192238SN/A // Make up a UID and EUID... it shouldn't matter, and we want the 8202238SN/A // simulation to be deterministic. 8212238SN/A 8222238SN/A // EUID goes in r20. 8233114Sgblack@eecs.umich.edu tc->setIntReg(SyscallPseudoReturnReg, process->euid()); //EUID 8245543Ssaidi@eecs.umich.edu return process->uid(); // UID 8252238SN/A} 8262238SN/A 8272238SN/A 8282238SN/ASyscallReturn 82911851Sbrandon.potter@amd.comgetgidPseudoFunc(SyscallDesc *desc, int callnum, Process *process, 83011851Sbrandon.potter@amd.com ThreadContext *tc) 8312238SN/A{ 8322238SN/A // Get current group ID. EGID goes in r20. 8333114Sgblack@eecs.umich.edu tc->setIntReg(SyscallPseudoReturnReg, process->egid()); //EGID 8343114Sgblack@eecs.umich.edu return process->gid(); 8352238SN/A} 8362238SN/A 8372238SN/A 8382238SN/ASyscallReturn 83911851Sbrandon.potter@amd.comsetuidFunc(SyscallDesc *desc, int callnum, Process *process, 8402680Sktlim@umich.edu ThreadContext *tc) 8412238SN/A{ 8422238SN/A // can't fathom why a benchmark would call this. 8436701Sgblack@eecs.umich.edu int index = 0; 8446701Sgblack@eecs.umich.edu warn("Ignoring call to setuid(%d)\n", process->getSyscallArg(tc, index)); 8452238SN/A return 0; 8462238SN/A} 8472238SN/A 8482238SN/ASyscallReturn 84911851Sbrandon.potter@amd.comgetpidFunc(SyscallDesc *desc, int callnum, Process *process, 8502680Sktlim@umich.edu ThreadContext *tc) 8512238SN/A{ 85211885Sbrandon.potter@amd.com return process->tgid(); 85311885Sbrandon.potter@amd.com} 8542238SN/A 85511885Sbrandon.potter@amd.comSyscallReturn 85611885Sbrandon.potter@amd.comgettidFunc(SyscallDesc *desc, int callnum, Process *process, 85711885Sbrandon.potter@amd.com ThreadContext *tc) 85811885Sbrandon.potter@amd.com{ 8593114Sgblack@eecs.umich.edu return process->pid(); 8602238SN/A} 8612238SN/A 8622238SN/ASyscallReturn 86311851Sbrandon.potter@amd.comgetppidFunc(SyscallDesc *desc, int callnum, Process *process, 86411851Sbrandon.potter@amd.com ThreadContext *tc) 8652238SN/A{ 8663114Sgblack@eecs.umich.edu return process->ppid(); 8672238SN/A} 8682238SN/A 8692238SN/ASyscallReturn 87011851Sbrandon.potter@amd.comgetuidFunc(SyscallDesc *desc, int callnum, Process *process, 8712680Sktlim@umich.edu ThreadContext *tc) 8722238SN/A{ 8735543Ssaidi@eecs.umich.edu return process->uid(); // UID 8742238SN/A} 8752238SN/A 8762238SN/ASyscallReturn 87711851Sbrandon.potter@amd.comgeteuidFunc(SyscallDesc *desc, int callnum, Process *process, 87811851Sbrandon.potter@amd.com ThreadContext *tc) 8792238SN/A{ 8805543Ssaidi@eecs.umich.edu return process->euid(); // UID 8812238SN/A} 8822238SN/A 8832238SN/ASyscallReturn 88411851Sbrandon.potter@amd.comgetgidFunc(SyscallDesc *desc, int callnum, Process *process, 8852680Sktlim@umich.edu ThreadContext *tc) 8862238SN/A{ 8873114Sgblack@eecs.umich.edu return process->gid(); 8882238SN/A} 8892238SN/A 8902238SN/ASyscallReturn 89111851Sbrandon.potter@amd.comgetegidFunc(SyscallDesc *desc, int callnum, Process *process, 89211851Sbrandon.potter@amd.com ThreadContext *tc) 8932238SN/A{ 8943114Sgblack@eecs.umich.edu return process->egid(); 8952238SN/A} 8962238SN/A 8979455Smitch.hayenga+gem5@gmail.comSyscallReturn 89811856Sbrandon.potter@amd.comfallocateFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 89911760Sbrandon.potter@amd.com{ 90011799Sbrandon.potter@amd.com#if NO_FALLOCATE 90111799Sbrandon.potter@amd.com warn("Host OS cannot support calls to fallocate. Ignoring syscall"); 90211799Sbrandon.potter@amd.com#else 90311760Sbrandon.potter@amd.com int index = 0; 90411856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 90511856Sbrandon.potter@amd.com int mode = p->getSyscallArg(tc, index); 90611856Sbrandon.potter@amd.com off_t offset = p->getSyscallArg(tc, index); 90711856Sbrandon.potter@amd.com off_t len = p->getSyscallArg(tc, index); 90811760Sbrandon.potter@amd.com 90911856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 91011856Sbrandon.potter@amd.com if (!ffdp) 91111760Sbrandon.potter@amd.com return -EBADF; 91211856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 91311760Sbrandon.potter@amd.com 91411760Sbrandon.potter@amd.com int result = fallocate(sim_fd, mode, offset, len); 91511760Sbrandon.potter@amd.com if (result < 0) 91611760Sbrandon.potter@amd.com return -errno; 91711799Sbrandon.potter@amd.com#endif 91811760Sbrandon.potter@amd.com return 0; 91911760Sbrandon.potter@amd.com} 92011760Sbrandon.potter@amd.com 92111760Sbrandon.potter@amd.comSyscallReturn 92211851Sbrandon.potter@amd.comaccessFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc, 92311851Sbrandon.potter@amd.com int index) 9249455Smitch.hayenga+gem5@gmail.com{ 9259455Smitch.hayenga+gem5@gmail.com string path; 9269455Smitch.hayenga+gem5@gmail.com if (!tc->getMemProxy().tryReadString(path, p->getSyscallArg(tc, index))) 92710223Ssteve.reinhardt@amd.com return -EFAULT; 9289455Smitch.hayenga+gem5@gmail.com 9299455Smitch.hayenga+gem5@gmail.com // Adjust path for current working directory 9309455Smitch.hayenga+gem5@gmail.com path = p->fullPath(path); 9319455Smitch.hayenga+gem5@gmail.com 9329455Smitch.hayenga+gem5@gmail.com mode_t mode = p->getSyscallArg(tc, index); 9339455Smitch.hayenga+gem5@gmail.com 9349455Smitch.hayenga+gem5@gmail.com int result = access(path.c_str(), mode); 9359455Smitch.hayenga+gem5@gmail.com return (result == -1) ? -errno : result; 9369455Smitch.hayenga+gem5@gmail.com} 93710203SAli.Saidi@ARM.com 93810203SAli.Saidi@ARM.comSyscallReturn 93911851Sbrandon.potter@amd.comaccessFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 94010203SAli.Saidi@ARM.com{ 94110203SAli.Saidi@ARM.com return accessFunc(desc, callnum, p, tc, 0); 94210203SAli.Saidi@ARM.com} 94310203SAli.Saidi@ARM.com 944