syscall_emul.cc revision 12796
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 3711911SBrandon.Potter@amd.com#include <csignal> 386712Snate@binkert.org#include <iostream> 39360SN/A#include <string> 40360SN/A 417680Sgblack@eecs.umich.edu#include "arch/utility.hh" 422474SN/A#include "base/chunk_generator.hh" 43360SN/A#include "base/trace.hh" 446658Snate@binkert.org#include "config/the_isa.hh" 452680Sktlim@umich.edu#include "cpu/thread_context.hh" 4612716Smichael.lebeane@amd.com#include "dev/net/dist_iface.hh" 472474SN/A#include "mem/page_table.hh" 48360SN/A#include "sim/process.hh" 498229Snate@binkert.org#include "sim/sim_exit.hh" 5011794Sbrandon.potter@amd.com#include "sim/syscall_debug_macros.hh" 5111794Sbrandon.potter@amd.com#include "sim/syscall_desc.hh" 526029Ssteve.reinhardt@amd.com#include "sim/system.hh" 53360SN/A 54360SN/Ausing namespace std; 552107SN/Ausing namespace TheISA; 56360SN/A 571450SN/ASyscallReturn 5811851Sbrandon.potter@amd.comunimplementedFunc(SyscallDesc *desc, int callnum, Process *process, 592680Sktlim@umich.edu ThreadContext *tc) 60360SN/A{ 6111794Sbrandon.potter@amd.com fatal("syscall %s (#%d) unimplemented.", desc->name(), callnum); 622484SN/A 632484SN/A return 1; 64360SN/A} 65360SN/A 66360SN/A 671450SN/ASyscallReturn 6811851Sbrandon.potter@amd.comignoreFunc(SyscallDesc *desc, int callnum, Process *process, 692680Sktlim@umich.edu ThreadContext *tc) 70360SN/A{ 7111794Sbrandon.potter@amd.com if (desc->needWarning()) { 7211794Sbrandon.potter@amd.com warn("ignoring syscall %s(...)%s", desc->name(), desc->warnOnce() ? 7311794Sbrandon.potter@amd.com "\n (further warnings will be suppressed)" : ""); 7410831Ssteve.reinhardt@amd.com } 75360SN/A 768149SChris.Emmons@ARM.com return 0; 778149SChris.Emmons@ARM.com} 788149SChris.Emmons@ARM.com 7911886Sbrandon.potter@amd.comstatic void 8011911SBrandon.Potter@amd.comexitFutexWake(ThreadContext *tc, Addr addr, uint64_t tgid) 8111886Sbrandon.potter@amd.com{ 8211911SBrandon.Potter@amd.com // Clear value at address pointed to by thread's childClearTID field. 8311911SBrandon.Potter@amd.com BufferArg ctidBuf(addr, sizeof(long)); 8411911SBrandon.Potter@amd.com long *ctid = (long *)ctidBuf.bufferPtr(); 8511911SBrandon.Potter@amd.com *ctid = 0; 8611911SBrandon.Potter@amd.com ctidBuf.copyOut(tc->getMemProxy()); 8711886Sbrandon.potter@amd.com 8811911SBrandon.Potter@amd.com FutexMap &futex_map = tc->getSystemPtr()->futexMap; 8911911SBrandon.Potter@amd.com // Wake one of the waiting threads. 9011911SBrandon.Potter@amd.com futex_map.wakeup(addr, tgid, 1); 9111911SBrandon.Potter@amd.com} 9211911SBrandon.Potter@amd.com 9311911SBrandon.Potter@amd.comstatic SyscallReturn 9411911SBrandon.Potter@amd.comexitImpl(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc, 9511911SBrandon.Potter@amd.com bool group) 9611911SBrandon.Potter@amd.com{ 9711911SBrandon.Potter@amd.com int index = 0; 9811911SBrandon.Potter@amd.com int status = p->getSyscallArg(tc, index); 9911911SBrandon.Potter@amd.com 10011911SBrandon.Potter@amd.com System *sys = tc->getSystemPtr(); 10111911SBrandon.Potter@amd.com 10211911SBrandon.Potter@amd.com int activeContexts = 0; 10311911SBrandon.Potter@amd.com for (auto &system: sys->systemList) 10411911SBrandon.Potter@amd.com activeContexts += system->numRunningContexts(); 10511911SBrandon.Potter@amd.com if (activeContexts == 1) { 10612716Smichael.lebeane@amd.com /** 10712716Smichael.lebeane@amd.com * Even though we are terminating the final thread context, dist-gem5 10812716Smichael.lebeane@amd.com * requires the simulation to remain active and provide 10912716Smichael.lebeane@amd.com * synchronization messages to the switch process. So we just halt 11012716Smichael.lebeane@amd.com * the last thread context and return. The simulation will be 11112716Smichael.lebeane@amd.com * terminated by dist-gem5 in a coordinated manner once all nodes 11212716Smichael.lebeane@amd.com * have signaled their readiness to exit. For non dist-gem5 11312716Smichael.lebeane@amd.com * simulations, readyToExit() always returns true. 11412716Smichael.lebeane@amd.com */ 11512716Smichael.lebeane@amd.com if (!DistIface::readyToExit(0)) { 11612716Smichael.lebeane@amd.com tc->halt(); 11712716Smichael.lebeane@amd.com return status; 11812716Smichael.lebeane@amd.com } 11912716Smichael.lebeane@amd.com 12011911SBrandon.Potter@amd.com exitSimLoop("exiting with last active thread context", status & 0xff); 12111911SBrandon.Potter@amd.com return status; 12211911SBrandon.Potter@amd.com } 12311911SBrandon.Potter@amd.com 12411911SBrandon.Potter@amd.com if (group) 12511911SBrandon.Potter@amd.com *p->exitGroup = true; 12611911SBrandon.Potter@amd.com 12711911SBrandon.Potter@amd.com if (p->childClearTID) 12811911SBrandon.Potter@amd.com exitFutexWake(tc, p->childClearTID, p->tgid()); 12911911SBrandon.Potter@amd.com 13011911SBrandon.Potter@amd.com bool last_thread = true; 13111911SBrandon.Potter@amd.com Process *parent = nullptr, *tg_lead = nullptr; 13211911SBrandon.Potter@amd.com for (int i = 0; last_thread && i < sys->numContexts(); i++) { 13311911SBrandon.Potter@amd.com Process *walk; 13411911SBrandon.Potter@amd.com if (!(walk = sys->threadContexts[i]->getProcessPtr())) 13511911SBrandon.Potter@amd.com continue; 13611911SBrandon.Potter@amd.com 13711911SBrandon.Potter@amd.com /** 13811911SBrandon.Potter@amd.com * Threads in a thread group require special handing. For instance, 13911911SBrandon.Potter@amd.com * we send the SIGCHLD signal so that it appears that it came from 14011911SBrandon.Potter@amd.com * the head of the group. We also only delete file descriptors if 14111911SBrandon.Potter@amd.com * we are the last thread in the thread group. 14211911SBrandon.Potter@amd.com */ 14311911SBrandon.Potter@amd.com if (walk->pid() == p->tgid()) 14411911SBrandon.Potter@amd.com tg_lead = walk; 14511911SBrandon.Potter@amd.com 14611911SBrandon.Potter@amd.com if ((sys->threadContexts[i]->status() != ThreadContext::Halted) 14711911SBrandon.Potter@amd.com && (walk != p)) { 14811911SBrandon.Potter@amd.com /** 14911911SBrandon.Potter@amd.com * Check if we share thread group with the pointer; this denotes 15011911SBrandon.Potter@amd.com * that we are not the last thread active in the thread group. 15111911SBrandon.Potter@amd.com * Note that setting this to false also prevents further 15211911SBrandon.Potter@amd.com * iterations of the loop. 15311911SBrandon.Potter@amd.com */ 15411911SBrandon.Potter@amd.com if (walk->tgid() == p->tgid()) 15511911SBrandon.Potter@amd.com last_thread = false; 15611911SBrandon.Potter@amd.com 15711911SBrandon.Potter@amd.com /** 15811911SBrandon.Potter@amd.com * A corner case exists which involves execve(). After execve(), 15911911SBrandon.Potter@amd.com * the execve will enable SIGCHLD in the process. The problem 16011911SBrandon.Potter@amd.com * occurs when the exiting process is the root process in the 16111911SBrandon.Potter@amd.com * system; there is no parent to receive the signal. We obviate 16211911SBrandon.Potter@amd.com * this problem by setting the root process' ppid to zero in the 16311911SBrandon.Potter@amd.com * Python configuration files. We really should handle the 16411911SBrandon.Potter@amd.com * root/execve specific case more gracefully. 16511911SBrandon.Potter@amd.com */ 16611911SBrandon.Potter@amd.com if (*p->sigchld && (p->ppid() != 0) && (walk->pid() == p->ppid())) 16711911SBrandon.Potter@amd.com parent = walk; 16811886Sbrandon.potter@amd.com } 16911886Sbrandon.potter@amd.com } 17011911SBrandon.Potter@amd.com 17111911SBrandon.Potter@amd.com if (last_thread) { 17211911SBrandon.Potter@amd.com if (parent) { 17311911SBrandon.Potter@amd.com assert(tg_lead); 17411911SBrandon.Potter@amd.com sys->signalList.push_back(BasicSignal(tg_lead, parent, SIGCHLD)); 17511911SBrandon.Potter@amd.com } 17611911SBrandon.Potter@amd.com 17711911SBrandon.Potter@amd.com /** 17811911SBrandon.Potter@amd.com * Run though FD array of the exiting process and close all file 17911911SBrandon.Potter@amd.com * descriptors except for the standard file descriptors. 18011911SBrandon.Potter@amd.com * (The standard file descriptors are shared with gem5.) 18111911SBrandon.Potter@amd.com */ 18211911SBrandon.Potter@amd.com for (int i = 0; i < p->fds->getSize(); i++) { 18311911SBrandon.Potter@amd.com if ((*p->fds)[i]) 18411911SBrandon.Potter@amd.com p->fds->closeFDEntry(i); 18511911SBrandon.Potter@amd.com } 18611911SBrandon.Potter@amd.com } 18711911SBrandon.Potter@amd.com 18811911SBrandon.Potter@amd.com tc->halt(); 18911911SBrandon.Potter@amd.com return status; 19011886Sbrandon.potter@amd.com} 1918149SChris.Emmons@ARM.com 1928149SChris.Emmons@ARM.comSyscallReturn 19311886Sbrandon.potter@amd.comexitFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 194360SN/A{ 19511911SBrandon.Potter@amd.com return exitImpl(desc, callnum, p, tc, false); 196360SN/A} 197360SN/A 1981450SN/ASyscallReturn 19911911SBrandon.Potter@amd.comexitGroupFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 2006109Ssanchezd@stanford.edu{ 20111911SBrandon.Potter@amd.com return exitImpl(desc, callnum, p, tc, true); 2026109Ssanchezd@stanford.edu} 2036109Ssanchezd@stanford.edu 2046109Ssanchezd@stanford.eduSyscallReturn 20511851Sbrandon.potter@amd.comgetpagesizeFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 206360SN/A{ 20710318Sandreas.hansson@arm.com return (int)PageBytes; 208360SN/A} 209360SN/A 210360SN/A 2111450SN/ASyscallReturn 21211851Sbrandon.potter@amd.combrkFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 213360SN/A{ 214360SN/A // change brk addr to first arg 2156701Sgblack@eecs.umich.edu int index = 0; 2166701Sgblack@eecs.umich.edu Addr new_brk = p->getSyscallArg(tc, index); 2175748SSteve.Reinhardt@amd.com 21811905SBrandon.Potter@amd.com std::shared_ptr<MemState> mem_state = p->memState; 21911905SBrandon.Potter@amd.com Addr brk_point = mem_state->getBrkPoint(); 22011905SBrandon.Potter@amd.com 2215748SSteve.Reinhardt@amd.com // in Linux at least, brk(0) returns the current break value 2225748SSteve.Reinhardt@amd.com // (note that the syscall and the glibc function have different behavior) 2235748SSteve.Reinhardt@amd.com if (new_brk == 0) 22411905SBrandon.Potter@amd.com return brk_point; 2255748SSteve.Reinhardt@amd.com 22611905SBrandon.Potter@amd.com if (new_brk > brk_point) { 2275748SSteve.Reinhardt@amd.com // might need to allocate some new pages 22811905SBrandon.Potter@amd.com for (ChunkGenerator gen(brk_point, 22911905SBrandon.Potter@amd.com new_brk - brk_point, 23010318Sandreas.hansson@arm.com PageBytes); !gen.done(); gen.next()) { 2315748SSteve.Reinhardt@amd.com if (!p->pTable->translate(gen.addr())) 23210318Sandreas.hansson@arm.com p->allocateMem(roundDown(gen.addr(), PageBytes), PageBytes); 2336687Stjones1@inf.ed.ac.uk 2346687Stjones1@inf.ed.ac.uk // if the address is already there, zero it out 2356687Stjones1@inf.ed.ac.uk else { 23611905SBrandon.Potter@amd.com uint8_t zero = 0; 2378852Sandreas.hansson@arm.com SETranslatingPortProxy &tp = tc->getMemProxy(); 2386687Stjones1@inf.ed.ac.uk 2396687Stjones1@inf.ed.ac.uk // split non-page aligned accesses 24010318Sandreas.hansson@arm.com Addr next_page = roundUp(gen.addr(), PageBytes); 2416687Stjones1@inf.ed.ac.uk uint32_t size_needed = next_page - gen.addr(); 2428852Sandreas.hansson@arm.com tp.memsetBlob(gen.addr(), zero, size_needed); 24310318Sandreas.hansson@arm.com if (gen.addr() + PageBytes > next_page && 2446687Stjones1@inf.ed.ac.uk next_page < new_brk && 24511906SBrandon.Potter@amd.com p->pTable->translate(next_page)) { 24610318Sandreas.hansson@arm.com size_needed = PageBytes - size_needed; 2478852Sandreas.hansson@arm.com tp.memsetBlob(next_page, zero, size_needed); 2486687Stjones1@inf.ed.ac.uk } 2496687Stjones1@inf.ed.ac.uk } 2502474SN/A } 2511450SN/A } 2525748SSteve.Reinhardt@amd.com 25311905SBrandon.Potter@amd.com mem_state->setBrkPoint(new_brk); 25411380Salexandru.dutu@amd.com DPRINTF_SYSCALL(Verbose, "brk: break point changed to: %#X\n", 25511905SBrandon.Potter@amd.com mem_state->getBrkPoint()); 25611905SBrandon.Potter@amd.com return mem_state->getBrkPoint(); 257360SN/A} 258360SN/A 25911886Sbrandon.potter@amd.comSyscallReturn 26011886Sbrandon.potter@amd.comsetTidAddressFunc(SyscallDesc *desc, int callnum, Process *process, 26111886Sbrandon.potter@amd.com ThreadContext *tc) 26211886Sbrandon.potter@amd.com{ 26311886Sbrandon.potter@amd.com int index = 0; 26411886Sbrandon.potter@amd.com uint64_t tidPtr = process->getSyscallArg(tc, index); 26511886Sbrandon.potter@amd.com 26611886Sbrandon.potter@amd.com process->childClearTID = tidPtr; 26711886Sbrandon.potter@amd.com return process->pid(); 26811886Sbrandon.potter@amd.com} 269360SN/A 2701450SN/ASyscallReturn 27111851Sbrandon.potter@amd.comcloseFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 272360SN/A{ 2736701Sgblack@eecs.umich.edu int index = 0; 27410931Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 27510931Sbrandon.potter@amd.com 27611856Sbrandon.potter@amd.com return p->fds->closeFDEntry(tgt_fd); 277360SN/A} 278360SN/A 279360SN/A 2801450SN/ASyscallReturn 28111851Sbrandon.potter@amd.comreadFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 282360SN/A{ 2836701Sgblack@eecs.umich.edu int index = 0; 28410931Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 28511906SBrandon.Potter@amd.com Addr buf_ptr = p->getSyscallArg(tc, index); 2866701Sgblack@eecs.umich.edu int nbytes = p->getSyscallArg(tc, index); 28711856Sbrandon.potter@amd.com 28811856Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 28911856Sbrandon.potter@amd.com if (!hbfdp) 29011856Sbrandon.potter@amd.com return -EBADF; 29111856Sbrandon.potter@amd.com int sim_fd = hbfdp->getSimFD(); 29211856Sbrandon.potter@amd.com 29311906SBrandon.Potter@amd.com BufferArg bufArg(buf_ptr, nbytes); 29410931Sbrandon.potter@amd.com int bytes_read = read(sim_fd, bufArg.bufferPtr(), nbytes); 295360SN/A 29611684Snderumigny@gmail.com if (bytes_read > 0) 2978706Sandreas.hansson@arm.com bufArg.copyOut(tc->getMemProxy()); 298360SN/A 2991458SN/A return bytes_read; 300360SN/A} 301360SN/A 3021450SN/ASyscallReturn 30311851Sbrandon.potter@amd.comwriteFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 304360SN/A{ 3056701Sgblack@eecs.umich.edu int index = 0; 30610931Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 30711906SBrandon.Potter@amd.com Addr buf_ptr = p->getSyscallArg(tc, index); 3086701Sgblack@eecs.umich.edu int nbytes = p->getSyscallArg(tc, index); 30911856Sbrandon.potter@amd.com 31011856Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 31111856Sbrandon.potter@amd.com if (!hbfdp) 31211856Sbrandon.potter@amd.com return -EBADF; 31311856Sbrandon.potter@amd.com int sim_fd = hbfdp->getSimFD(); 31411856Sbrandon.potter@amd.com 31511906SBrandon.Potter@amd.com BufferArg bufArg(buf_ptr, nbytes); 3168706Sandreas.hansson@arm.com bufArg.copyIn(tc->getMemProxy()); 317360SN/A 31810931Sbrandon.potter@amd.com int bytes_written = write(sim_fd, bufArg.bufferPtr(), nbytes); 319360SN/A 32010931Sbrandon.potter@amd.com fsync(sim_fd); 321360SN/A 3221458SN/A return bytes_written; 323360SN/A} 324360SN/A 325360SN/A 3261450SN/ASyscallReturn 32711851Sbrandon.potter@amd.comlseekFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 328360SN/A{ 3296701Sgblack@eecs.umich.edu int index = 0; 33010931Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 3316701Sgblack@eecs.umich.edu uint64_t offs = p->getSyscallArg(tc, index); 3326701Sgblack@eecs.umich.edu int whence = p->getSyscallArg(tc, index); 333360SN/A 33411856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 33511856Sbrandon.potter@amd.com if (!ffdp) 33610931Sbrandon.potter@amd.com return -EBADF; 33711856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 33810931Sbrandon.potter@amd.com 33910931Sbrandon.potter@amd.com off_t result = lseek(sim_fd, offs, whence); 340360SN/A 3411458SN/A return (result == (off_t)-1) ? -errno : result; 342360SN/A} 343360SN/A 344360SN/A 3451450SN/ASyscallReturn 34611851Sbrandon.potter@amd.com_llseekFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 3474118Sgblack@eecs.umich.edu{ 3486701Sgblack@eecs.umich.edu int index = 0; 34910931Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 3506701Sgblack@eecs.umich.edu uint64_t offset_high = p->getSyscallArg(tc, index); 3516701Sgblack@eecs.umich.edu uint32_t offset_low = p->getSyscallArg(tc, index); 3526701Sgblack@eecs.umich.edu Addr result_ptr = p->getSyscallArg(tc, index); 3536701Sgblack@eecs.umich.edu int whence = p->getSyscallArg(tc, index); 3544118Sgblack@eecs.umich.edu 35511856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 35611856Sbrandon.potter@amd.com if (!ffdp) 35710931Sbrandon.potter@amd.com return -EBADF; 35811856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 35910931Sbrandon.potter@amd.com 3604118Sgblack@eecs.umich.edu uint64_t offset = (offset_high << 32) | offset_low; 3614118Sgblack@eecs.umich.edu 36210931Sbrandon.potter@amd.com uint64_t result = lseek(sim_fd, offset, whence); 3634118Sgblack@eecs.umich.edu result = TheISA::htog(result); 3644118Sgblack@eecs.umich.edu 36511379Sbrandon.potter@amd.com if (result == (off_t)-1) 3664118Sgblack@eecs.umich.edu return -errno; 36711379Sbrandon.potter@amd.com // Assuming that the size of loff_t is 64 bits on the target platform 36811379Sbrandon.potter@amd.com BufferArg result_buf(result_ptr, sizeof(result)); 36911379Sbrandon.potter@amd.com memcpy(result_buf.bufferPtr(), &result, sizeof(result)); 37011379Sbrandon.potter@amd.com result_buf.copyOut(tc->getMemProxy()); 37111379Sbrandon.potter@amd.com return 0; 3724118Sgblack@eecs.umich.edu} 3734118Sgblack@eecs.umich.edu 3744118Sgblack@eecs.umich.edu 3754118Sgblack@eecs.umich.eduSyscallReturn 37611851Sbrandon.potter@amd.communmapFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 377360SN/A{ 37811383Sbrandon.potter@amd.com // With mmap more fully implemented, it might be worthwhile to bite 37911383Sbrandon.potter@amd.com // the bullet and implement munmap. Should allow us to reuse simulated 38011383Sbrandon.potter@amd.com // memory. 3811458SN/A return 0; 382360SN/A} 383360SN/A 384360SN/A 385360SN/Aconst char *hostname = "m5.eecs.umich.edu"; 386360SN/A 3871450SN/ASyscallReturn 38811851Sbrandon.potter@amd.comgethostnameFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 389360SN/A{ 3906701Sgblack@eecs.umich.edu int index = 0; 39111906SBrandon.Potter@amd.com Addr buf_ptr = p->getSyscallArg(tc, index); 3926701Sgblack@eecs.umich.edu int name_len = p->getSyscallArg(tc, index); 39311906SBrandon.Potter@amd.com BufferArg name(buf_ptr, name_len); 394360SN/A 395360SN/A strncpy((char *)name.bufferPtr(), hostname, name_len); 396360SN/A 3978706Sandreas.hansson@arm.com name.copyOut(tc->getMemProxy()); 398360SN/A 3991458SN/A return 0; 400360SN/A} 401360SN/A 4021450SN/ASyscallReturn 40311851Sbrandon.potter@amd.comgetcwdFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 4045513SMichael.Adler@intel.com{ 4055513SMichael.Adler@intel.com int result = 0; 4066731Svince@csl.cornell.edu int index = 0; 40711906SBrandon.Potter@amd.com Addr buf_ptr = p->getSyscallArg(tc, index); 4086701Sgblack@eecs.umich.edu unsigned long size = p->getSyscallArg(tc, index); 40911906SBrandon.Potter@amd.com BufferArg buf(buf_ptr, size); 4105513SMichael.Adler@intel.com 4115513SMichael.Adler@intel.com // Is current working directory defined? 4125513SMichael.Adler@intel.com string cwd = p->getcwd(); 4135513SMichael.Adler@intel.com if (!cwd.empty()) { 4145513SMichael.Adler@intel.com if (cwd.length() >= size) { 4155513SMichael.Adler@intel.com // Buffer too small 4165513SMichael.Adler@intel.com return -ERANGE; 4175513SMichael.Adler@intel.com } 4185513SMichael.Adler@intel.com strncpy((char *)buf.bufferPtr(), cwd.c_str(), size); 4195513SMichael.Adler@intel.com result = cwd.length(); 42010955Sdavid.hashe@amd.com } else { 42111856Sbrandon.potter@amd.com if (getcwd((char *)buf.bufferPtr(), size)) { 4225513SMichael.Adler@intel.com result = strlen((char *)buf.bufferPtr()); 42310955Sdavid.hashe@amd.com } else { 4245513SMichael.Adler@intel.com result = -1; 4255513SMichael.Adler@intel.com } 4265513SMichael.Adler@intel.com } 4275513SMichael.Adler@intel.com 4288706Sandreas.hansson@arm.com buf.copyOut(tc->getMemProxy()); 4295513SMichael.Adler@intel.com 4305513SMichael.Adler@intel.com return (result == -1) ? -errno : result; 4315513SMichael.Adler@intel.com} 4325513SMichael.Adler@intel.com 43310203SAli.Saidi@ARM.comSyscallReturn 43411851Sbrandon.potter@amd.comreadlinkFunc(SyscallDesc *desc, int callnum, Process *process, 43511851Sbrandon.potter@amd.com ThreadContext *tc) 43610203SAli.Saidi@ARM.com{ 43710203SAli.Saidi@ARM.com return readlinkFunc(desc, callnum, process, tc, 0); 43810203SAli.Saidi@ARM.com} 4395513SMichael.Adler@intel.com 4405513SMichael.Adler@intel.comSyscallReturn 44111851Sbrandon.potter@amd.comreadlinkFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc, 44211851Sbrandon.potter@amd.com int index) 4435513SMichael.Adler@intel.com{ 4445513SMichael.Adler@intel.com string path; 4455513SMichael.Adler@intel.com 4468852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, p->getSyscallArg(tc, index))) 44710223Ssteve.reinhardt@amd.com return -EFAULT; 4485513SMichael.Adler@intel.com 4495513SMichael.Adler@intel.com // Adjust path for current working directory 4505513SMichael.Adler@intel.com path = p->fullPath(path); 4515513SMichael.Adler@intel.com 45211906SBrandon.Potter@amd.com Addr buf_ptr = p->getSyscallArg(tc, index); 4536701Sgblack@eecs.umich.edu size_t bufsiz = p->getSyscallArg(tc, index); 4546701Sgblack@eecs.umich.edu 45511906SBrandon.Potter@amd.com BufferArg buf(buf_ptr, bufsiz); 4565513SMichael.Adler@intel.com 45710955Sdavid.hashe@amd.com int result = -1; 45810955Sdavid.hashe@amd.com if (path != "/proc/self/exe") { 45910955Sdavid.hashe@amd.com result = readlink(path.c_str(), (char *)buf.bufferPtr(), bufsiz); 46010955Sdavid.hashe@amd.com } else { 46111140Sjthestness@gmail.com // Emulate readlink() called on '/proc/self/exe' should return the 46211140Sjthestness@gmail.com // absolute path of the binary running in the simulated system (the 46311851Sbrandon.potter@amd.com // Process' executable). It is possible that using this path in 46411140Sjthestness@gmail.com // the simulated system will result in unexpected behavior if: 46511140Sjthestness@gmail.com // 1) One binary runs another (e.g., -c time -o "my_binary"), and 46611140Sjthestness@gmail.com // called binary calls readlink(). 46711140Sjthestness@gmail.com // 2) The host's full path to the running benchmark changes from one 46811140Sjthestness@gmail.com // simulation to another. This can result in different simulated 46911140Sjthestness@gmail.com // performance since the simulated system will process the binary 47011140Sjthestness@gmail.com // path differently, even if the binary itself does not change. 47111140Sjthestness@gmail.com 47211140Sjthestness@gmail.com // Get the absolute canonical path to the running application 47311140Sjthestness@gmail.com char real_path[PATH_MAX]; 47411140Sjthestness@gmail.com char *check_real_path = realpath(p->progName(), real_path); 47511140Sjthestness@gmail.com if (!check_real_path) { 47611140Sjthestness@gmail.com fatal("readlink('/proc/self/exe') unable to resolve path to " 47711140Sjthestness@gmail.com "executable: %s", p->progName()); 47811140Sjthestness@gmail.com } 47911140Sjthestness@gmail.com strncpy((char*)buf.bufferPtr(), real_path, bufsiz); 48011140Sjthestness@gmail.com size_t real_path_len = strlen(real_path); 48111140Sjthestness@gmail.com if (real_path_len > bufsiz) { 48210955Sdavid.hashe@amd.com // readlink will truncate the contents of the 48310955Sdavid.hashe@amd.com // path to ensure it is no more than bufsiz 48410955Sdavid.hashe@amd.com result = bufsiz; 48510955Sdavid.hashe@amd.com } else { 48611140Sjthestness@gmail.com result = real_path_len; 48710955Sdavid.hashe@amd.com } 48811140Sjthestness@gmail.com 48911140Sjthestness@gmail.com // Issue a warning about potential unexpected results 49011140Sjthestness@gmail.com warn_once("readlink() called on '/proc/self/exe' may yield unexpected " 49111140Sjthestness@gmail.com "results in various settings.\n Returning '%s'\n", 49211140Sjthestness@gmail.com (char*)buf.bufferPtr()); 49310955Sdavid.hashe@amd.com } 4945513SMichael.Adler@intel.com 4958706Sandreas.hansson@arm.com buf.copyOut(tc->getMemProxy()); 4965513SMichael.Adler@intel.com 4975513SMichael.Adler@intel.com return (result == -1) ? -errno : result; 4985513SMichael.Adler@intel.com} 4995513SMichael.Adler@intel.com 5005513SMichael.Adler@intel.comSyscallReturn 50111851Sbrandon.potter@amd.comunlinkFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 502511SN/A{ 50310633Smichaelupton@gmail.com return unlinkHelper(desc, num, p, tc, 0); 50410633Smichaelupton@gmail.com} 50510633Smichaelupton@gmail.com 50610633Smichaelupton@gmail.comSyscallReturn 50711851Sbrandon.potter@amd.comunlinkHelper(SyscallDesc *desc, int num, Process *p, ThreadContext *tc, 50811851Sbrandon.potter@amd.com int index) 50910633Smichaelupton@gmail.com{ 5101706SN/A string path; 511360SN/A 5128852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, p->getSyscallArg(tc, index))) 51310223Ssteve.reinhardt@amd.com return -EFAULT; 514511SN/A 5153669Sbinkertn@umich.edu // Adjust path for current working directory 5163669Sbinkertn@umich.edu path = p->fullPath(path); 5173669Sbinkertn@umich.edu 518511SN/A int result = unlink(path.c_str()); 5191458SN/A return (result == -1) ? -errno : result; 520511SN/A} 521511SN/A 52212795Smattdsinclair@gmail.comSyscallReturn 52312795Smattdsinclair@gmail.comlinkFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 52412795Smattdsinclair@gmail.com{ 52512795Smattdsinclair@gmail.com string path; 52612795Smattdsinclair@gmail.com string new_path; 52712795Smattdsinclair@gmail.com 52812795Smattdsinclair@gmail.com int index = 0; 52912795Smattdsinclair@gmail.com auto &virt_mem = tc->getMemProxy(); 53012795Smattdsinclair@gmail.com if (!virt_mem.tryReadString(path, p->getSyscallArg(tc, index))) 53112795Smattdsinclair@gmail.com return -EFAULT; 53212795Smattdsinclair@gmail.com if (!virt_mem.tryReadString(new_path, p->getSyscallArg(tc, index))) 53312795Smattdsinclair@gmail.com return -EFAULT; 53412795Smattdsinclair@gmail.com 53512795Smattdsinclair@gmail.com path = p->fullPath(path); 53612795Smattdsinclair@gmail.com new_path = p->fullPath(new_path); 53712795Smattdsinclair@gmail.com 53812795Smattdsinclair@gmail.com int result = link(path.c_str(), new_path.c_str()); 53912795Smattdsinclair@gmail.com return (result == -1) ? -errno : result; 54012795Smattdsinclair@gmail.com} 5415513SMichael.Adler@intel.com 5425513SMichael.Adler@intel.comSyscallReturn 54312796Smattdsinclair@gmail.comsymlinkFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 54412796Smattdsinclair@gmail.com{ 54512796Smattdsinclair@gmail.com string path; 54612796Smattdsinclair@gmail.com string new_path; 54712796Smattdsinclair@gmail.com 54812796Smattdsinclair@gmail.com int index = 0; 54912796Smattdsinclair@gmail.com auto &virt_mem = tc->getMemProxy(); 55012796Smattdsinclair@gmail.com if (!virt_mem.tryReadString(path, p->getSyscallArg(tc, index))) 55112796Smattdsinclair@gmail.com return -EFAULT; 55212796Smattdsinclair@gmail.com if (!virt_mem.tryReadString(new_path, p->getSyscallArg(tc, index))) 55312796Smattdsinclair@gmail.com return -EFAULT; 55412796Smattdsinclair@gmail.com 55512796Smattdsinclair@gmail.com path = p->fullPath(path); 55612796Smattdsinclair@gmail.com new_path = p->fullPath(new_path); 55712796Smattdsinclair@gmail.com 55812796Smattdsinclair@gmail.com int result = symlink(path.c_str(), new_path.c_str()); 55912796Smattdsinclair@gmail.com return (result == -1) ? -errno : result; 56012796Smattdsinclair@gmail.com} 56112796Smattdsinclair@gmail.com 56212796Smattdsinclair@gmail.comSyscallReturn 56311851Sbrandon.potter@amd.commkdirFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 5645513SMichael.Adler@intel.com{ 5655513SMichael.Adler@intel.com string path; 5665513SMichael.Adler@intel.com 5676701Sgblack@eecs.umich.edu int index = 0; 5688852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, p->getSyscallArg(tc, index))) 56910223Ssteve.reinhardt@amd.com return -EFAULT; 5705513SMichael.Adler@intel.com 5715513SMichael.Adler@intel.com // Adjust path for current working directory 5725513SMichael.Adler@intel.com path = p->fullPath(path); 5735513SMichael.Adler@intel.com 5746701Sgblack@eecs.umich.edu mode_t mode = p->getSyscallArg(tc, index); 5755513SMichael.Adler@intel.com 5765513SMichael.Adler@intel.com int result = mkdir(path.c_str(), mode); 5775513SMichael.Adler@intel.com return (result == -1) ? -errno : result; 5785513SMichael.Adler@intel.com} 5795513SMichael.Adler@intel.com 5801450SN/ASyscallReturn 58111851Sbrandon.potter@amd.comrenameFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 582511SN/A{ 5831706SN/A string old_name; 584511SN/A 5856701Sgblack@eecs.umich.edu int index = 0; 5868852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(old_name, p->getSyscallArg(tc, index))) 5871458SN/A return -EFAULT; 588511SN/A 5891706SN/A string new_name; 590511SN/A 5918852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(new_name, p->getSyscallArg(tc, index))) 5921458SN/A return -EFAULT; 593511SN/A 5943669Sbinkertn@umich.edu // Adjust path for current working directory 5953669Sbinkertn@umich.edu old_name = p->fullPath(old_name); 5963669Sbinkertn@umich.edu new_name = p->fullPath(new_name); 5973669Sbinkertn@umich.edu 5981706SN/A int64_t result = rename(old_name.c_str(), new_name.c_str()); 5991458SN/A return (result == -1) ? -errno : result; 600511SN/A} 601511SN/A 6021706SN/ASyscallReturn 60311851Sbrandon.potter@amd.comtruncateFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 6041706SN/A{ 6051706SN/A string path; 6061706SN/A 6076701Sgblack@eecs.umich.edu int index = 0; 6088852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, p->getSyscallArg(tc, index))) 6091706SN/A return -EFAULT; 6101706SN/A 6116701Sgblack@eecs.umich.edu off_t length = p->getSyscallArg(tc, index); 6121706SN/A 6133669Sbinkertn@umich.edu // Adjust path for current working directory 6143669Sbinkertn@umich.edu path = p->fullPath(path); 6153669Sbinkertn@umich.edu 6161706SN/A int result = truncate(path.c_str(), length); 6171706SN/A return (result == -1) ? -errno : result; 6181706SN/A} 6191706SN/A 6201706SN/ASyscallReturn 62111856Sbrandon.potter@amd.comftruncateFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 6221706SN/A{ 6236701Sgblack@eecs.umich.edu int index = 0; 62411856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 62511856Sbrandon.potter@amd.com off_t length = p->getSyscallArg(tc, index); 6261706SN/A 62711856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 62811856Sbrandon.potter@amd.com if (!ffdp) 6291706SN/A return -EBADF; 63011856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 6311706SN/A 63210931Sbrandon.potter@amd.com int result = ftruncate(sim_fd, length); 6331706SN/A return (result == -1) ? -errno : result; 6341706SN/A} 6351999SN/A 6361999SN/ASyscallReturn 6376703Svince@csl.cornell.edutruncate64Func(SyscallDesc *desc, int num, 63811851Sbrandon.potter@amd.com Process *process, ThreadContext *tc) 6396703Svince@csl.cornell.edu{ 6406703Svince@csl.cornell.edu int index = 0; 6416703Svince@csl.cornell.edu string path; 6426703Svince@csl.cornell.edu 6438852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, process->getSyscallArg(tc, index))) 64411906SBrandon.Potter@amd.com return -EFAULT; 6456703Svince@csl.cornell.edu 6466744SAli.Saidi@arm.com int64_t length = process->getSyscallArg(tc, index, 64); 6476703Svince@csl.cornell.edu 6486703Svince@csl.cornell.edu // Adjust path for current working directory 6496703Svince@csl.cornell.edu path = process->fullPath(path); 6506703Svince@csl.cornell.edu 6516744SAli.Saidi@arm.com#if NO_STAT64 6526744SAli.Saidi@arm.com int result = truncate(path.c_str(), length); 6536744SAli.Saidi@arm.com#else 6546703Svince@csl.cornell.edu int result = truncate64(path.c_str(), length); 6556744SAli.Saidi@arm.com#endif 6566703Svince@csl.cornell.edu return (result == -1) ? -errno : result; 6576703Svince@csl.cornell.edu} 6586703Svince@csl.cornell.edu 6596703Svince@csl.cornell.eduSyscallReturn 66011856Sbrandon.potter@amd.comftruncate64Func(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 6616685Stjones1@inf.ed.ac.uk{ 6626701Sgblack@eecs.umich.edu int index = 0; 66311856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 66411856Sbrandon.potter@amd.com int64_t length = p->getSyscallArg(tc, index, 64); 6656685Stjones1@inf.ed.ac.uk 66611856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 66711856Sbrandon.potter@amd.com if (!ffdp) 6686685Stjones1@inf.ed.ac.uk return -EBADF; 66911856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 6706685Stjones1@inf.ed.ac.uk 6716744SAli.Saidi@arm.com#if NO_STAT64 67210931Sbrandon.potter@amd.com int result = ftruncate(sim_fd, length); 6736744SAli.Saidi@arm.com#else 67410931Sbrandon.potter@amd.com int result = ftruncate64(sim_fd, length); 6756744SAli.Saidi@arm.com#endif 6766685Stjones1@inf.ed.ac.uk return (result == -1) ? -errno : result; 6776685Stjones1@inf.ed.ac.uk} 6786685Stjones1@inf.ed.ac.uk 6796685Stjones1@inf.ed.ac.ukSyscallReturn 68011851Sbrandon.potter@amd.comumaskFunc(SyscallDesc *desc, int num, Process *process, ThreadContext *tc) 6815513SMichael.Adler@intel.com{ 6825513SMichael.Adler@intel.com // Letting the simulated program change the simulator's umask seems like 6835513SMichael.Adler@intel.com // a bad idea. Compromise by just returning the current umask but not 6845513SMichael.Adler@intel.com // changing anything. 6855513SMichael.Adler@intel.com mode_t oldMask = umask(0); 6865513SMichael.Adler@intel.com umask(oldMask); 6875521Snate@binkert.org return (int)oldMask; 6885513SMichael.Adler@intel.com} 6895513SMichael.Adler@intel.com 6905513SMichael.Adler@intel.comSyscallReturn 69111851Sbrandon.potter@amd.comchownFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 6921999SN/A{ 6931999SN/A string path; 6941999SN/A 6956701Sgblack@eecs.umich.edu int index = 0; 6968852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, p->getSyscallArg(tc, index))) 6971999SN/A return -EFAULT; 6981999SN/A 6991999SN/A /* XXX endianess */ 7006701Sgblack@eecs.umich.edu uint32_t owner = p->getSyscallArg(tc, index); 7011999SN/A uid_t hostOwner = owner; 7026701Sgblack@eecs.umich.edu uint32_t group = p->getSyscallArg(tc, index); 7031999SN/A gid_t hostGroup = group; 7041999SN/A 7053669Sbinkertn@umich.edu // Adjust path for current working directory 7063669Sbinkertn@umich.edu path = p->fullPath(path); 7073669Sbinkertn@umich.edu 7081999SN/A int result = chown(path.c_str(), hostOwner, hostGroup); 7091999SN/A return (result == -1) ? -errno : result; 7101999SN/A} 7111999SN/A 7121999SN/ASyscallReturn 71311856Sbrandon.potter@amd.comfchownFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 7141999SN/A{ 7156701Sgblack@eecs.umich.edu int index = 0; 71611856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 7171999SN/A 71811856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 71911856Sbrandon.potter@amd.com if (!ffdp) 7201999SN/A return -EBADF; 72111856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 7221999SN/A 7231999SN/A /* XXX endianess */ 72411856Sbrandon.potter@amd.com uint32_t owner = p->getSyscallArg(tc, index); 7251999SN/A uid_t hostOwner = owner; 72611856Sbrandon.potter@amd.com uint32_t group = p->getSyscallArg(tc, index); 7271999SN/A gid_t hostGroup = group; 7281999SN/A 72910931Sbrandon.potter@amd.com int result = fchown(sim_fd, hostOwner, hostGroup); 7301999SN/A return (result == -1) ? -errno : result; 7311999SN/A} 7322093SN/A 73311856Sbrandon.potter@amd.com/** 73411908SBrandon.Potter@amd.com * FIXME: The file description is not shared among file descriptors created 73511908SBrandon.Potter@amd.com * with dup. Really, it's difficult to maintain fields like file offset or 73611908SBrandon.Potter@amd.com * flags since an update to such a field won't be reflected in the metadata 73711908SBrandon.Potter@amd.com * for the fd entries that we maintain for checkpoint restoration. 73811856Sbrandon.potter@amd.com */ 7392093SN/ASyscallReturn 74011856Sbrandon.potter@amd.comdupFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 7413079Sstever@eecs.umich.edu{ 7426701Sgblack@eecs.umich.edu int index = 0; 74311856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 74410931Sbrandon.potter@amd.com 74511856Sbrandon.potter@amd.com auto old_hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 74611856Sbrandon.potter@amd.com if (!old_hbfdp) 7473079Sstever@eecs.umich.edu return -EBADF; 74811856Sbrandon.potter@amd.com int sim_fd = old_hbfdp->getSimFD(); 7495282Srstrong@cs.ucsd.edu 75010781Snilay@cs.wisc.edu int result = dup(sim_fd); 75111908SBrandon.Potter@amd.com if (result == -1) 75211908SBrandon.Potter@amd.com return -errno; 75311856Sbrandon.potter@amd.com 75411908SBrandon.Potter@amd.com auto new_hbfdp = std::dynamic_pointer_cast<HBFDEntry>(old_hbfdp->clone()); 75511856Sbrandon.potter@amd.com new_hbfdp->setSimFD(result); 75611908SBrandon.Potter@amd.com new_hbfdp->setCOE(false); 75711908SBrandon.Potter@amd.com return p->fds->allocFD(new_hbfdp); 75811908SBrandon.Potter@amd.com} 75911856Sbrandon.potter@amd.com 76011908SBrandon.Potter@amd.comSyscallReturn 76111908SBrandon.Potter@amd.comdup2Func(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 76211908SBrandon.Potter@amd.com{ 76311908SBrandon.Potter@amd.com int index = 0; 76411908SBrandon.Potter@amd.com 76511908SBrandon.Potter@amd.com int old_tgt_fd = p->getSyscallArg(tc, index); 76611908SBrandon.Potter@amd.com auto old_hbp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[old_tgt_fd]); 76711908SBrandon.Potter@amd.com if (!old_hbp) 76811908SBrandon.Potter@amd.com return -EBADF; 76911908SBrandon.Potter@amd.com int old_sim_fd = old_hbp->getSimFD(); 77011908SBrandon.Potter@amd.com 77111908SBrandon.Potter@amd.com /** 77211908SBrandon.Potter@amd.com * We need a valid host file descriptor number to be able to pass into 77311908SBrandon.Potter@amd.com * the second parameter for dup2 (newfd), but we don't know what the 77411908SBrandon.Potter@amd.com * viable numbers are; we execute the open call to retrieve one. 77511908SBrandon.Potter@amd.com */ 77611908SBrandon.Potter@amd.com int res_fd = dup2(old_sim_fd, open("/dev/null", O_RDONLY)); 77711908SBrandon.Potter@amd.com if (res_fd == -1) 77811908SBrandon.Potter@amd.com return -errno; 77911908SBrandon.Potter@amd.com 78011908SBrandon.Potter@amd.com int new_tgt_fd = p->getSyscallArg(tc, index); 78111908SBrandon.Potter@amd.com auto new_hbp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[new_tgt_fd]); 78211908SBrandon.Potter@amd.com if (new_hbp) 78311908SBrandon.Potter@amd.com p->fds->closeFDEntry(new_tgt_fd); 78411908SBrandon.Potter@amd.com new_hbp = std::dynamic_pointer_cast<HBFDEntry>(old_hbp->clone()); 78511908SBrandon.Potter@amd.com new_hbp->setSimFD(res_fd); 78611908SBrandon.Potter@amd.com new_hbp->setCOE(false); 78711908SBrandon.Potter@amd.com 78811908SBrandon.Potter@amd.com return p->fds->allocFD(new_hbp); 7893079Sstever@eecs.umich.edu} 7903079Sstever@eecs.umich.edu 7913079Sstever@eecs.umich.eduSyscallReturn 79211856Sbrandon.potter@amd.comfcntlFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 7932093SN/A{ 79411875Sbrandon.potter@amd.com int arg; 7956701Sgblack@eecs.umich.edu int index = 0; 79611856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 79711875Sbrandon.potter@amd.com int cmd = p->getSyscallArg(tc, index); 7982093SN/A 79911856Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 80011856Sbrandon.potter@amd.com if (!hbfdp) 8012093SN/A return -EBADF; 80211856Sbrandon.potter@amd.com int sim_fd = hbfdp->getSimFD(); 8032093SN/A 80411875Sbrandon.potter@amd.com int coe = hbfdp->getCOE(); 80511875Sbrandon.potter@amd.com 8062093SN/A switch (cmd) { 80711875Sbrandon.potter@amd.com case F_GETFD: 80811875Sbrandon.potter@amd.com return coe & FD_CLOEXEC; 8092093SN/A 81011875Sbrandon.potter@amd.com case F_SETFD: { 81111875Sbrandon.potter@amd.com arg = p->getSyscallArg(tc, index); 81211875Sbrandon.potter@amd.com arg ? hbfdp->setCOE(true) : hbfdp->setCOE(false); 8132093SN/A return 0; 81411875Sbrandon.potter@amd.com } 8152093SN/A 81611875Sbrandon.potter@amd.com // Rely on the host to maintain the file status flags for this file 81711875Sbrandon.potter@amd.com // description rather than maintain it ourselves. Admittedly, this 81811875Sbrandon.potter@amd.com // is suboptimal (and possibly error prone), but it is difficult to 81911875Sbrandon.potter@amd.com // maintain the flags by tracking them across the different descriptors 82011875Sbrandon.potter@amd.com // (that refer to this file description) caused by clone, dup, and 82111875Sbrandon.potter@amd.com // subsequent fcntls. 82211875Sbrandon.potter@amd.com case F_GETFL: 82311875Sbrandon.potter@amd.com case F_SETFL: { 82411875Sbrandon.potter@amd.com arg = p->getSyscallArg(tc, index); 82511875Sbrandon.potter@amd.com int rv = fcntl(sim_fd, cmd, arg); 82611875Sbrandon.potter@amd.com return (rv == -1) ? -errno : rv; 82711875Sbrandon.potter@amd.com } 8282093SN/A 8292093SN/A default: 83011875Sbrandon.potter@amd.com warn("fcntl: unsupported command %d\n", cmd); 8312093SN/A return 0; 8322093SN/A } 8332093SN/A} 8342093SN/A 8352238SN/ASyscallReturn 83611856Sbrandon.potter@amd.comfcntl64Func(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 8372687Sksewell@umich.edu{ 8386701Sgblack@eecs.umich.edu int index = 0; 83911856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 8402687Sksewell@umich.edu 84111856Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 84211856Sbrandon.potter@amd.com if (!hbfdp) 8432687Sksewell@umich.edu return -EBADF; 84411856Sbrandon.potter@amd.com int sim_fd = hbfdp->getSimFD(); 8452687Sksewell@umich.edu 84611856Sbrandon.potter@amd.com int cmd = p->getSyscallArg(tc, index); 8472687Sksewell@umich.edu switch (cmd) { 8482687Sksewell@umich.edu case 33: //F_GETLK64 84910931Sbrandon.potter@amd.com warn("fcntl64(%d, F_GETLK64) not supported, error returned\n", tgt_fd); 8502687Sksewell@umich.edu return -EMFILE; 8512687Sksewell@umich.edu 8522687Sksewell@umich.edu case 34: // F_SETLK64 8532687Sksewell@umich.edu case 35: // F_SETLKW64 85410931Sbrandon.potter@amd.com warn("fcntl64(%d, F_SETLK(W)64) not supported, error returned\n", 85510931Sbrandon.potter@amd.com tgt_fd); 8562687Sksewell@umich.edu return -EMFILE; 8572687Sksewell@umich.edu 8582687Sksewell@umich.edu default: 8592687Sksewell@umich.edu // not sure if this is totally valid, but we'll pass it through 8602687Sksewell@umich.edu // to the underlying OS 86110931Sbrandon.potter@amd.com warn("fcntl64(%d, %d) passed through to host\n", tgt_fd, cmd); 86210931Sbrandon.potter@amd.com return fcntl(sim_fd, cmd); 8632687Sksewell@umich.edu } 8642687Sksewell@umich.edu} 8652687Sksewell@umich.edu 8662687Sksewell@umich.eduSyscallReturn 86711908SBrandon.Potter@amd.compipeImpl(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc, 86811908SBrandon.Potter@amd.com bool pseudoPipe) 8692238SN/A{ 87011908SBrandon.Potter@amd.com Addr tgt_addr = 0; 87111908SBrandon.Potter@amd.com if (!pseudoPipe) { 87211908SBrandon.Potter@amd.com int index = 0; 87311908SBrandon.Potter@amd.com tgt_addr = p->getSyscallArg(tc, index); 87411908SBrandon.Potter@amd.com } 87511908SBrandon.Potter@amd.com 87611856Sbrandon.potter@amd.com int sim_fds[2], tgt_fds[2]; 8772093SN/A 87811856Sbrandon.potter@amd.com int pipe_retval = pipe(sim_fds); 87911908SBrandon.Potter@amd.com if (pipe_retval == -1) 88011908SBrandon.Potter@amd.com return -errno; 8812238SN/A 88211856Sbrandon.potter@amd.com auto rend = PipeFDEntry::EndType::read; 88311856Sbrandon.potter@amd.com auto rpfd = std::make_shared<PipeFDEntry>(sim_fds[0], O_WRONLY, rend); 88411908SBrandon.Potter@amd.com tgt_fds[0] = p->fds->allocFD(rpfd); 8852238SN/A 88611856Sbrandon.potter@amd.com auto wend = PipeFDEntry::EndType::write; 88711856Sbrandon.potter@amd.com auto wpfd = std::make_shared<PipeFDEntry>(sim_fds[1], O_RDONLY, wend); 88811908SBrandon.Potter@amd.com tgt_fds[1] = p->fds->allocFD(wpfd); 88911856Sbrandon.potter@amd.com 89011856Sbrandon.potter@amd.com /** 89111856Sbrandon.potter@amd.com * Now patch the read object to record the target file descriptor chosen 89211856Sbrandon.potter@amd.com * as the write end of the pipe. 89311856Sbrandon.potter@amd.com */ 89411856Sbrandon.potter@amd.com rpfd->setPipeReadSource(tgt_fds[1]); 89511856Sbrandon.potter@amd.com 89611856Sbrandon.potter@amd.com /** 89711856Sbrandon.potter@amd.com * Alpha Linux convention for pipe() is that fd[0] is returned as 89811856Sbrandon.potter@amd.com * the return value of the function, and fd[1] is returned in r20. 89911856Sbrandon.potter@amd.com */ 90011908SBrandon.Potter@amd.com if (pseudoPipe) { 90111908SBrandon.Potter@amd.com tc->setIntReg(SyscallPseudoReturnReg, tgt_fds[1]); 90211908SBrandon.Potter@amd.com return tgt_fds[0]; 90311908SBrandon.Potter@amd.com } 90411908SBrandon.Potter@amd.com 90511908SBrandon.Potter@amd.com /** 90611908SBrandon.Potter@amd.com * Copy the target file descriptors into buffer space and then copy 90711908SBrandon.Potter@amd.com * the buffer space back into the target address space. 90811908SBrandon.Potter@amd.com */ 90911908SBrandon.Potter@amd.com BufferArg tgt_handle(tgt_addr, sizeof(int[2])); 91011908SBrandon.Potter@amd.com int *buf_ptr = (int*)tgt_handle.bufferPtr(); 91111908SBrandon.Potter@amd.com buf_ptr[0] = tgt_fds[0]; 91211908SBrandon.Potter@amd.com buf_ptr[1] = tgt_fds[1]; 91311908SBrandon.Potter@amd.com tgt_handle.copyOut(tc->getMemProxy()); 91411908SBrandon.Potter@amd.com return 0; 91511908SBrandon.Potter@amd.com} 91611908SBrandon.Potter@amd.com 91711908SBrandon.Potter@amd.comSyscallReturn 91811908SBrandon.Potter@amd.compipePseudoFunc(SyscallDesc *desc, int callnum, Process *process, 91911908SBrandon.Potter@amd.com ThreadContext *tc) 92011908SBrandon.Potter@amd.com{ 92111908SBrandon.Potter@amd.com return pipeImpl(desc, callnum, process, tc, true); 92211908SBrandon.Potter@amd.com} 92311908SBrandon.Potter@amd.com 92411908SBrandon.Potter@amd.comSyscallReturn 92511908SBrandon.Potter@amd.compipeFunc(SyscallDesc *desc, int callnum, Process *process, ThreadContext *tc) 92611908SBrandon.Potter@amd.com{ 92711908SBrandon.Potter@amd.com return pipeImpl(desc, callnum, process, tc, false); 9282238SN/A} 9292238SN/A 93011885Sbrandon.potter@amd.comSyscallReturn 93111885Sbrandon.potter@amd.comsetpgidFunc(SyscallDesc *desc, int callnum, Process *process, 93211885Sbrandon.potter@amd.com ThreadContext *tc) 93311885Sbrandon.potter@amd.com{ 93411885Sbrandon.potter@amd.com int index = 0; 93511885Sbrandon.potter@amd.com int pid = process->getSyscallArg(tc, index); 93611885Sbrandon.potter@amd.com int pgid = process->getSyscallArg(tc, index); 93711885Sbrandon.potter@amd.com 93811885Sbrandon.potter@amd.com if (pgid < 0) 93911885Sbrandon.potter@amd.com return -EINVAL; 94011885Sbrandon.potter@amd.com 94111885Sbrandon.potter@amd.com if (pid == 0) { 94211885Sbrandon.potter@amd.com process->setpgid(process->pid()); 94311885Sbrandon.potter@amd.com return 0; 94411885Sbrandon.potter@amd.com } 94511885Sbrandon.potter@amd.com 94611913SBrandon.Potter@amd.com Process *matched_ph = nullptr; 94711885Sbrandon.potter@amd.com System *sysh = tc->getSystemPtr(); 94811885Sbrandon.potter@amd.com 94911885Sbrandon.potter@amd.com // Retrieves process pointer from active/suspended thread contexts. 95011885Sbrandon.potter@amd.com for (int i = 0; i < sysh->numContexts(); i++) { 95111885Sbrandon.potter@amd.com if (sysh->threadContexts[i]->status() != ThreadContext::Halted) { 95211885Sbrandon.potter@amd.com Process *temp_h = sysh->threadContexts[i]->getProcessPtr(); 95311885Sbrandon.potter@amd.com Process *walk_ph = (Process*)temp_h; 95411885Sbrandon.potter@amd.com 95511885Sbrandon.potter@amd.com if (walk_ph && walk_ph->pid() == process->pid()) 95611885Sbrandon.potter@amd.com matched_ph = walk_ph; 95711885Sbrandon.potter@amd.com } 95811885Sbrandon.potter@amd.com } 95911885Sbrandon.potter@amd.com 96011913SBrandon.Potter@amd.com assert(matched_ph); 96111885Sbrandon.potter@amd.com matched_ph->setpgid((pgid == 0) ? matched_ph->pid() : pgid); 96211885Sbrandon.potter@amd.com 96311885Sbrandon.potter@amd.com return 0; 96411885Sbrandon.potter@amd.com} 9652238SN/A 9662238SN/ASyscallReturn 96711851Sbrandon.potter@amd.comgetpidPseudoFunc(SyscallDesc *desc, int callnum, Process *process, 96811851Sbrandon.potter@amd.com ThreadContext *tc) 9692238SN/A{ 9702238SN/A // Make up a PID. There's no interprocess communication in 9712238SN/A // fake_syscall mode, so there's no way for a process to know it's 9722238SN/A // not getting a unique value. 9732238SN/A 9743114Sgblack@eecs.umich.edu tc->setIntReg(SyscallPseudoReturnReg, process->ppid()); 9753114Sgblack@eecs.umich.edu return process->pid(); 9762238SN/A} 9772238SN/A 9782238SN/A 9792238SN/ASyscallReturn 98011851Sbrandon.potter@amd.comgetuidPseudoFunc(SyscallDesc *desc, int callnum, Process *process, 98111851Sbrandon.potter@amd.com ThreadContext *tc) 9822238SN/A{ 9832238SN/A // Make up a UID and EUID... it shouldn't matter, and we want the 9842238SN/A // simulation to be deterministic. 9852238SN/A 9862238SN/A // EUID goes in r20. 98711906SBrandon.Potter@amd.com tc->setIntReg(SyscallPseudoReturnReg, process->euid()); // EUID 98811906SBrandon.Potter@amd.com return process->uid(); // UID 9892238SN/A} 9902238SN/A 9912238SN/A 9922238SN/ASyscallReturn 99311851Sbrandon.potter@amd.comgetgidPseudoFunc(SyscallDesc *desc, int callnum, Process *process, 99411851Sbrandon.potter@amd.com ThreadContext *tc) 9952238SN/A{ 9962238SN/A // Get current group ID. EGID goes in r20. 99711906SBrandon.Potter@amd.com tc->setIntReg(SyscallPseudoReturnReg, process->egid()); // EGID 9983114Sgblack@eecs.umich.edu return process->gid(); 9992238SN/A} 10002238SN/A 10012238SN/A 10022238SN/ASyscallReturn 100311851Sbrandon.potter@amd.comsetuidFunc(SyscallDesc *desc, int callnum, Process *process, 10042680Sktlim@umich.edu ThreadContext *tc) 10052238SN/A{ 10062238SN/A // can't fathom why a benchmark would call this. 10076701Sgblack@eecs.umich.edu int index = 0; 10086701Sgblack@eecs.umich.edu warn("Ignoring call to setuid(%d)\n", process->getSyscallArg(tc, index)); 10092238SN/A return 0; 10102238SN/A} 10112238SN/A 10122238SN/ASyscallReturn 101311851Sbrandon.potter@amd.comgetpidFunc(SyscallDesc *desc, int callnum, Process *process, 10142680Sktlim@umich.edu ThreadContext *tc) 10152238SN/A{ 101611885Sbrandon.potter@amd.com return process->tgid(); 101711885Sbrandon.potter@amd.com} 10182238SN/A 101911885Sbrandon.potter@amd.comSyscallReturn 102011885Sbrandon.potter@amd.comgettidFunc(SyscallDesc *desc, int callnum, Process *process, 102111885Sbrandon.potter@amd.com ThreadContext *tc) 102211885Sbrandon.potter@amd.com{ 10233114Sgblack@eecs.umich.edu return process->pid(); 10242238SN/A} 10252238SN/A 10262238SN/ASyscallReturn 102711851Sbrandon.potter@amd.comgetppidFunc(SyscallDesc *desc, int callnum, Process *process, 102811851Sbrandon.potter@amd.com ThreadContext *tc) 10292238SN/A{ 10303114Sgblack@eecs.umich.edu return process->ppid(); 10312238SN/A} 10322238SN/A 10332238SN/ASyscallReturn 103411851Sbrandon.potter@amd.comgetuidFunc(SyscallDesc *desc, int callnum, Process *process, 10352680Sktlim@umich.edu ThreadContext *tc) 10362238SN/A{ 10375543Ssaidi@eecs.umich.edu return process->uid(); // UID 10382238SN/A} 10392238SN/A 10402238SN/ASyscallReturn 104111851Sbrandon.potter@amd.comgeteuidFunc(SyscallDesc *desc, int callnum, Process *process, 104211851Sbrandon.potter@amd.com ThreadContext *tc) 10432238SN/A{ 10445543Ssaidi@eecs.umich.edu return process->euid(); // UID 10452238SN/A} 10462238SN/A 10472238SN/ASyscallReturn 104811851Sbrandon.potter@amd.comgetgidFunc(SyscallDesc *desc, int callnum, Process *process, 10492680Sktlim@umich.edu ThreadContext *tc) 10502238SN/A{ 10513114Sgblack@eecs.umich.edu return process->gid(); 10522238SN/A} 10532238SN/A 10542238SN/ASyscallReturn 105511851Sbrandon.potter@amd.comgetegidFunc(SyscallDesc *desc, int callnum, Process *process, 105611851Sbrandon.potter@amd.com ThreadContext *tc) 10572238SN/A{ 10583114Sgblack@eecs.umich.edu return process->egid(); 10592238SN/A} 10602238SN/A 10619455Smitch.hayenga+gem5@gmail.comSyscallReturn 106211856Sbrandon.potter@amd.comfallocateFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 106311760Sbrandon.potter@amd.com{ 106411799Sbrandon.potter@amd.com#if NO_FALLOCATE 106511799Sbrandon.potter@amd.com warn("Host OS cannot support calls to fallocate. Ignoring syscall"); 106611799Sbrandon.potter@amd.com#else 106711760Sbrandon.potter@amd.com int index = 0; 106811856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 106911856Sbrandon.potter@amd.com int mode = p->getSyscallArg(tc, index); 107011856Sbrandon.potter@amd.com off_t offset = p->getSyscallArg(tc, index); 107111856Sbrandon.potter@amd.com off_t len = p->getSyscallArg(tc, index); 107211760Sbrandon.potter@amd.com 107311856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 107411856Sbrandon.potter@amd.com if (!ffdp) 107511760Sbrandon.potter@amd.com return -EBADF; 107611856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 107711760Sbrandon.potter@amd.com 107811760Sbrandon.potter@amd.com int result = fallocate(sim_fd, mode, offset, len); 107911760Sbrandon.potter@amd.com if (result < 0) 108011760Sbrandon.potter@amd.com return -errno; 108111799Sbrandon.potter@amd.com#endif 108211760Sbrandon.potter@amd.com return 0; 108311760Sbrandon.potter@amd.com} 108411760Sbrandon.potter@amd.com 108511760Sbrandon.potter@amd.comSyscallReturn 108611851Sbrandon.potter@amd.comaccessFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc, 108711851Sbrandon.potter@amd.com int index) 10889455Smitch.hayenga+gem5@gmail.com{ 10899455Smitch.hayenga+gem5@gmail.com string path; 10909455Smitch.hayenga+gem5@gmail.com if (!tc->getMemProxy().tryReadString(path, p->getSyscallArg(tc, index))) 109110223Ssteve.reinhardt@amd.com return -EFAULT; 10929455Smitch.hayenga+gem5@gmail.com 10939455Smitch.hayenga+gem5@gmail.com // Adjust path for current working directory 10949455Smitch.hayenga+gem5@gmail.com path = p->fullPath(path); 10959455Smitch.hayenga+gem5@gmail.com 10969455Smitch.hayenga+gem5@gmail.com mode_t mode = p->getSyscallArg(tc, index); 10979455Smitch.hayenga+gem5@gmail.com 10989455Smitch.hayenga+gem5@gmail.com int result = access(path.c_str(), mode); 10999455Smitch.hayenga+gem5@gmail.com return (result == -1) ? -errno : result; 11009455Smitch.hayenga+gem5@gmail.com} 110110203SAli.Saidi@ARM.com 110210203SAli.Saidi@ARM.comSyscallReturn 110311851Sbrandon.potter@amd.comaccessFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 110410203SAli.Saidi@ARM.com{ 110510203SAli.Saidi@ARM.com return accessFunc(desc, callnum, p, tc, 0); 110610203SAli.Saidi@ARM.com} 110710203SAli.Saidi@ARM.com 1108