syscall_emul.cc revision 11905
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 15311905SBrandon.Potter@amd.com std::shared_ptr<MemState> mem_state = p->memState; 15411905SBrandon.Potter@amd.com Addr brk_point = mem_state->getBrkPoint(); 15511905SBrandon.Potter@amd.com 1565748SSteve.Reinhardt@amd.com // in Linux at least, brk(0) returns the current break value 1575748SSteve.Reinhardt@amd.com // (note that the syscall and the glibc function have different behavior) 1585748SSteve.Reinhardt@amd.com if (new_brk == 0) 15911905SBrandon.Potter@amd.com return brk_point; 1605748SSteve.Reinhardt@amd.com 16111905SBrandon.Potter@amd.com if (new_brk > brk_point) { 1625748SSteve.Reinhardt@amd.com // might need to allocate some new pages 16311905SBrandon.Potter@amd.com for (ChunkGenerator gen(brk_point, 16411905SBrandon.Potter@amd.com new_brk - brk_point, 16510318Sandreas.hansson@arm.com PageBytes); !gen.done(); gen.next()) { 1665748SSteve.Reinhardt@amd.com if (!p->pTable->translate(gen.addr())) 16710318Sandreas.hansson@arm.com p->allocateMem(roundDown(gen.addr(), PageBytes), PageBytes); 1686687Stjones1@inf.ed.ac.uk 1696687Stjones1@inf.ed.ac.uk // if the address is already there, zero it out 1706687Stjones1@inf.ed.ac.uk else { 17111905SBrandon.Potter@amd.com uint8_t zero = 0; 1728852Sandreas.hansson@arm.com SETranslatingPortProxy &tp = tc->getMemProxy(); 1736687Stjones1@inf.ed.ac.uk 1746687Stjones1@inf.ed.ac.uk // split non-page aligned accesses 17510318Sandreas.hansson@arm.com Addr next_page = roundUp(gen.addr(), PageBytes); 1766687Stjones1@inf.ed.ac.uk uint32_t size_needed = next_page - gen.addr(); 1778852Sandreas.hansson@arm.com tp.memsetBlob(gen.addr(), zero, size_needed); 17810318Sandreas.hansson@arm.com if (gen.addr() + PageBytes > next_page && 1796687Stjones1@inf.ed.ac.uk next_page < new_brk && 1806687Stjones1@inf.ed.ac.uk p->pTable->translate(next_page)) 1816687Stjones1@inf.ed.ac.uk { 18210318Sandreas.hansson@arm.com size_needed = PageBytes - size_needed; 1838852Sandreas.hansson@arm.com tp.memsetBlob(next_page, zero, size_needed); 1846687Stjones1@inf.ed.ac.uk } 1856687Stjones1@inf.ed.ac.uk } 1862474SN/A } 1871450SN/A } 1885748SSteve.Reinhardt@amd.com 18911905SBrandon.Potter@amd.com mem_state->setBrkPoint(new_brk); 19011380Salexandru.dutu@amd.com DPRINTF_SYSCALL(Verbose, "brk: break point changed to: %#X\n", 19111905SBrandon.Potter@amd.com mem_state->getBrkPoint()); 19211905SBrandon.Potter@amd.com return mem_state->getBrkPoint(); 193360SN/A} 194360SN/A 19511886Sbrandon.potter@amd.comSyscallReturn 19611886Sbrandon.potter@amd.comsetTidAddressFunc(SyscallDesc *desc, int callnum, Process *process, 19711886Sbrandon.potter@amd.com ThreadContext *tc) 19811886Sbrandon.potter@amd.com{ 19911886Sbrandon.potter@amd.com int index = 0; 20011886Sbrandon.potter@amd.com uint64_t tidPtr = process->getSyscallArg(tc, index); 20111886Sbrandon.potter@amd.com 20211886Sbrandon.potter@amd.com process->childClearTID = tidPtr; 20311886Sbrandon.potter@amd.com return process->pid(); 20411886Sbrandon.potter@amd.com} 205360SN/A 2061450SN/ASyscallReturn 20711851Sbrandon.potter@amd.comcloseFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 208360SN/A{ 2096701Sgblack@eecs.umich.edu int index = 0; 21010931Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 21110931Sbrandon.potter@amd.com 21211856Sbrandon.potter@amd.com return p->fds->closeFDEntry(tgt_fd); 213360SN/A} 214360SN/A 215360SN/A 2161450SN/ASyscallReturn 21711851Sbrandon.potter@amd.comreadFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 218360SN/A{ 2196701Sgblack@eecs.umich.edu int index = 0; 22010931Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 2216701Sgblack@eecs.umich.edu Addr bufPtr = p->getSyscallArg(tc, index); 2226701Sgblack@eecs.umich.edu int nbytes = p->getSyscallArg(tc, index); 22311856Sbrandon.potter@amd.com 22411856Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 22511856Sbrandon.potter@amd.com if (!hbfdp) 22611856Sbrandon.potter@amd.com return -EBADF; 22711856Sbrandon.potter@amd.com int sim_fd = hbfdp->getSimFD(); 22811856Sbrandon.potter@amd.com 2296701Sgblack@eecs.umich.edu BufferArg bufArg(bufPtr, nbytes); 23010931Sbrandon.potter@amd.com int bytes_read = read(sim_fd, bufArg.bufferPtr(), nbytes); 231360SN/A 23211684Snderumigny@gmail.com if (bytes_read > 0) 2338706Sandreas.hansson@arm.com bufArg.copyOut(tc->getMemProxy()); 234360SN/A 2351458SN/A return bytes_read; 236360SN/A} 237360SN/A 2381450SN/ASyscallReturn 23911851Sbrandon.potter@amd.comwriteFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 240360SN/A{ 2416701Sgblack@eecs.umich.edu int index = 0; 24210931Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 2436701Sgblack@eecs.umich.edu Addr bufPtr = p->getSyscallArg(tc, index); 2446701Sgblack@eecs.umich.edu int nbytes = p->getSyscallArg(tc, index); 24511856Sbrandon.potter@amd.com 24611856Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 24711856Sbrandon.potter@amd.com if (!hbfdp) 24811856Sbrandon.potter@amd.com return -EBADF; 24911856Sbrandon.potter@amd.com int sim_fd = hbfdp->getSimFD(); 25011856Sbrandon.potter@amd.com 2516701Sgblack@eecs.umich.edu BufferArg bufArg(bufPtr, nbytes); 2528706Sandreas.hansson@arm.com bufArg.copyIn(tc->getMemProxy()); 253360SN/A 25410931Sbrandon.potter@amd.com int bytes_written = write(sim_fd, bufArg.bufferPtr(), nbytes); 255360SN/A 25610931Sbrandon.potter@amd.com fsync(sim_fd); 257360SN/A 2581458SN/A return bytes_written; 259360SN/A} 260360SN/A 261360SN/A 2621450SN/ASyscallReturn 26311851Sbrandon.potter@amd.comlseekFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 264360SN/A{ 2656701Sgblack@eecs.umich.edu int index = 0; 26610931Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 2676701Sgblack@eecs.umich.edu uint64_t offs = p->getSyscallArg(tc, index); 2686701Sgblack@eecs.umich.edu int whence = p->getSyscallArg(tc, index); 269360SN/A 27011856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 27111856Sbrandon.potter@amd.com if (!ffdp) 27210931Sbrandon.potter@amd.com return -EBADF; 27311856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 27410931Sbrandon.potter@amd.com 27510931Sbrandon.potter@amd.com off_t result = lseek(sim_fd, offs, whence); 276360SN/A 2771458SN/A return (result == (off_t)-1) ? -errno : result; 278360SN/A} 279360SN/A 280360SN/A 2811450SN/ASyscallReturn 28211851Sbrandon.potter@amd.com_llseekFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 2834118Sgblack@eecs.umich.edu{ 2846701Sgblack@eecs.umich.edu int index = 0; 28510931Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 2866701Sgblack@eecs.umich.edu uint64_t offset_high = p->getSyscallArg(tc, index); 2876701Sgblack@eecs.umich.edu uint32_t offset_low = p->getSyscallArg(tc, index); 2886701Sgblack@eecs.umich.edu Addr result_ptr = p->getSyscallArg(tc, index); 2896701Sgblack@eecs.umich.edu int whence = p->getSyscallArg(tc, index); 2904118Sgblack@eecs.umich.edu 29111856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 29211856Sbrandon.potter@amd.com if (!ffdp) 29310931Sbrandon.potter@amd.com return -EBADF; 29411856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 29510931Sbrandon.potter@amd.com 2964118Sgblack@eecs.umich.edu uint64_t offset = (offset_high << 32) | offset_low; 2974118Sgblack@eecs.umich.edu 29810931Sbrandon.potter@amd.com uint64_t result = lseek(sim_fd, offset, whence); 2994118Sgblack@eecs.umich.edu result = TheISA::htog(result); 3004118Sgblack@eecs.umich.edu 30111379Sbrandon.potter@amd.com if (result == (off_t)-1) 3024118Sgblack@eecs.umich.edu return -errno; 30311379Sbrandon.potter@amd.com // Assuming that the size of loff_t is 64 bits on the target platform 30411379Sbrandon.potter@amd.com BufferArg result_buf(result_ptr, sizeof(result)); 30511379Sbrandon.potter@amd.com memcpy(result_buf.bufferPtr(), &result, sizeof(result)); 30611379Sbrandon.potter@amd.com result_buf.copyOut(tc->getMemProxy()); 30711379Sbrandon.potter@amd.com return 0; 3084118Sgblack@eecs.umich.edu} 3094118Sgblack@eecs.umich.edu 3104118Sgblack@eecs.umich.edu 3114118Sgblack@eecs.umich.eduSyscallReturn 31211851Sbrandon.potter@amd.communmapFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 313360SN/A{ 31411383Sbrandon.potter@amd.com // With mmap more fully implemented, it might be worthwhile to bite 31511383Sbrandon.potter@amd.com // the bullet and implement munmap. Should allow us to reuse simulated 31611383Sbrandon.potter@amd.com // memory. 3171458SN/A return 0; 318360SN/A} 319360SN/A 320360SN/A 321360SN/Aconst char *hostname = "m5.eecs.umich.edu"; 322360SN/A 3231450SN/ASyscallReturn 32411851Sbrandon.potter@amd.comgethostnameFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 325360SN/A{ 3266701Sgblack@eecs.umich.edu int index = 0; 3276701Sgblack@eecs.umich.edu Addr bufPtr = p->getSyscallArg(tc, index); 3286701Sgblack@eecs.umich.edu int name_len = p->getSyscallArg(tc, index); 3296701Sgblack@eecs.umich.edu BufferArg name(bufPtr, name_len); 330360SN/A 331360SN/A strncpy((char *)name.bufferPtr(), hostname, name_len); 332360SN/A 3338706Sandreas.hansson@arm.com name.copyOut(tc->getMemProxy()); 334360SN/A 3351458SN/A return 0; 336360SN/A} 337360SN/A 3381450SN/ASyscallReturn 33911851Sbrandon.potter@amd.comgetcwdFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 3405513SMichael.Adler@intel.com{ 3415513SMichael.Adler@intel.com int result = 0; 3426731Svince@csl.cornell.edu int index = 0; 3436701Sgblack@eecs.umich.edu Addr bufPtr = p->getSyscallArg(tc, index); 3446701Sgblack@eecs.umich.edu unsigned long size = p->getSyscallArg(tc, index); 3456701Sgblack@eecs.umich.edu BufferArg buf(bufPtr, size); 3465513SMichael.Adler@intel.com 3475513SMichael.Adler@intel.com // Is current working directory defined? 3485513SMichael.Adler@intel.com string cwd = p->getcwd(); 3495513SMichael.Adler@intel.com if (!cwd.empty()) { 3505513SMichael.Adler@intel.com if (cwd.length() >= size) { 3515513SMichael.Adler@intel.com // Buffer too small 3525513SMichael.Adler@intel.com return -ERANGE; 3535513SMichael.Adler@intel.com } 3545513SMichael.Adler@intel.com strncpy((char *)buf.bufferPtr(), cwd.c_str(), size); 3555513SMichael.Adler@intel.com result = cwd.length(); 35610955Sdavid.hashe@amd.com } else { 35711856Sbrandon.potter@amd.com if (getcwd((char *)buf.bufferPtr(), size)) { 3585513SMichael.Adler@intel.com result = strlen((char *)buf.bufferPtr()); 35910955Sdavid.hashe@amd.com } else { 3605513SMichael.Adler@intel.com result = -1; 3615513SMichael.Adler@intel.com } 3625513SMichael.Adler@intel.com } 3635513SMichael.Adler@intel.com 3648706Sandreas.hansson@arm.com buf.copyOut(tc->getMemProxy()); 3655513SMichael.Adler@intel.com 3665513SMichael.Adler@intel.com return (result == -1) ? -errno : result; 3675513SMichael.Adler@intel.com} 3685513SMichael.Adler@intel.com 36910203SAli.Saidi@ARM.com/// Target open() handler. 37010203SAli.Saidi@ARM.comSyscallReturn 37111851Sbrandon.potter@amd.comreadlinkFunc(SyscallDesc *desc, int callnum, Process *process, 37211851Sbrandon.potter@amd.com ThreadContext *tc) 37310203SAli.Saidi@ARM.com{ 37410203SAli.Saidi@ARM.com return readlinkFunc(desc, callnum, process, tc, 0); 37510203SAli.Saidi@ARM.com} 3765513SMichael.Adler@intel.com 3775513SMichael.Adler@intel.comSyscallReturn 37811851Sbrandon.potter@amd.comreadlinkFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc, 37911851Sbrandon.potter@amd.com int index) 3805513SMichael.Adler@intel.com{ 3815513SMichael.Adler@intel.com string path; 3825513SMichael.Adler@intel.com 3838852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, p->getSyscallArg(tc, index))) 38410223Ssteve.reinhardt@amd.com return -EFAULT; 3855513SMichael.Adler@intel.com 3865513SMichael.Adler@intel.com // Adjust path for current working directory 3875513SMichael.Adler@intel.com path = p->fullPath(path); 3885513SMichael.Adler@intel.com 3896701Sgblack@eecs.umich.edu Addr bufPtr = p->getSyscallArg(tc, index); 3906701Sgblack@eecs.umich.edu size_t bufsiz = p->getSyscallArg(tc, index); 3916701Sgblack@eecs.umich.edu 3926701Sgblack@eecs.umich.edu BufferArg buf(bufPtr, bufsiz); 3935513SMichael.Adler@intel.com 39410955Sdavid.hashe@amd.com int result = -1; 39510955Sdavid.hashe@amd.com if (path != "/proc/self/exe") { 39610955Sdavid.hashe@amd.com result = readlink(path.c_str(), (char *)buf.bufferPtr(), bufsiz); 39710955Sdavid.hashe@amd.com } else { 39811140Sjthestness@gmail.com // Emulate readlink() called on '/proc/self/exe' should return the 39911140Sjthestness@gmail.com // absolute path of the binary running in the simulated system (the 40011851Sbrandon.potter@amd.com // Process' executable). It is possible that using this path in 40111140Sjthestness@gmail.com // the simulated system will result in unexpected behavior if: 40211140Sjthestness@gmail.com // 1) One binary runs another (e.g., -c time -o "my_binary"), and 40311140Sjthestness@gmail.com // called binary calls readlink(). 40411140Sjthestness@gmail.com // 2) The host's full path to the running benchmark changes from one 40511140Sjthestness@gmail.com // simulation to another. This can result in different simulated 40611140Sjthestness@gmail.com // performance since the simulated system will process the binary 40711140Sjthestness@gmail.com // path differently, even if the binary itself does not change. 40811140Sjthestness@gmail.com 40911140Sjthestness@gmail.com // Get the absolute canonical path to the running application 41011140Sjthestness@gmail.com char real_path[PATH_MAX]; 41111140Sjthestness@gmail.com char *check_real_path = realpath(p->progName(), real_path); 41211140Sjthestness@gmail.com if (!check_real_path) { 41311140Sjthestness@gmail.com fatal("readlink('/proc/self/exe') unable to resolve path to " 41411140Sjthestness@gmail.com "executable: %s", p->progName()); 41511140Sjthestness@gmail.com } 41611140Sjthestness@gmail.com strncpy((char*)buf.bufferPtr(), real_path, bufsiz); 41711140Sjthestness@gmail.com size_t real_path_len = strlen(real_path); 41811140Sjthestness@gmail.com if (real_path_len > bufsiz) { 41910955Sdavid.hashe@amd.com // readlink will truncate the contents of the 42010955Sdavid.hashe@amd.com // path to ensure it is no more than bufsiz 42110955Sdavid.hashe@amd.com result = bufsiz; 42210955Sdavid.hashe@amd.com } else { 42311140Sjthestness@gmail.com result = real_path_len; 42410955Sdavid.hashe@amd.com } 42511140Sjthestness@gmail.com 42611140Sjthestness@gmail.com // Issue a warning about potential unexpected results 42711140Sjthestness@gmail.com warn_once("readlink() called on '/proc/self/exe' may yield unexpected " 42811140Sjthestness@gmail.com "results in various settings.\n Returning '%s'\n", 42911140Sjthestness@gmail.com (char*)buf.bufferPtr()); 43010955Sdavid.hashe@amd.com } 4315513SMichael.Adler@intel.com 4328706Sandreas.hansson@arm.com buf.copyOut(tc->getMemProxy()); 4335513SMichael.Adler@intel.com 4345513SMichael.Adler@intel.com return (result == -1) ? -errno : result; 4355513SMichael.Adler@intel.com} 4365513SMichael.Adler@intel.com 4375513SMichael.Adler@intel.comSyscallReturn 43811851Sbrandon.potter@amd.comunlinkFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 439511SN/A{ 44010633Smichaelupton@gmail.com return unlinkHelper(desc, num, p, tc, 0); 44110633Smichaelupton@gmail.com} 44210633Smichaelupton@gmail.com 44310633Smichaelupton@gmail.comSyscallReturn 44411851Sbrandon.potter@amd.comunlinkHelper(SyscallDesc *desc, int num, Process *p, ThreadContext *tc, 44511851Sbrandon.potter@amd.com int index) 44610633Smichaelupton@gmail.com{ 4471706SN/A string path; 448360SN/A 4498852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, p->getSyscallArg(tc, index))) 45010223Ssteve.reinhardt@amd.com return -EFAULT; 451511SN/A 4523669Sbinkertn@umich.edu // Adjust path for current working directory 4533669Sbinkertn@umich.edu path = p->fullPath(path); 4543669Sbinkertn@umich.edu 455511SN/A int result = unlink(path.c_str()); 4561458SN/A return (result == -1) ? -errno : result; 457511SN/A} 458511SN/A 4595513SMichael.Adler@intel.com 4605513SMichael.Adler@intel.comSyscallReturn 46111851Sbrandon.potter@amd.commkdirFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 4625513SMichael.Adler@intel.com{ 4635513SMichael.Adler@intel.com string path; 4645513SMichael.Adler@intel.com 4656701Sgblack@eecs.umich.edu int index = 0; 4668852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, p->getSyscallArg(tc, index))) 46710223Ssteve.reinhardt@amd.com return -EFAULT; 4685513SMichael.Adler@intel.com 4695513SMichael.Adler@intel.com // Adjust path for current working directory 4705513SMichael.Adler@intel.com path = p->fullPath(path); 4715513SMichael.Adler@intel.com 4726701Sgblack@eecs.umich.edu mode_t mode = p->getSyscallArg(tc, index); 4735513SMichael.Adler@intel.com 4745513SMichael.Adler@intel.com int result = mkdir(path.c_str(), mode); 4755513SMichael.Adler@intel.com return (result == -1) ? -errno : result; 4765513SMichael.Adler@intel.com} 4775513SMichael.Adler@intel.com 4781450SN/ASyscallReturn 47911851Sbrandon.potter@amd.comrenameFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 480511SN/A{ 4811706SN/A string old_name; 482511SN/A 4836701Sgblack@eecs.umich.edu int index = 0; 4848852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(old_name, p->getSyscallArg(tc, index))) 4851458SN/A return -EFAULT; 486511SN/A 4871706SN/A string new_name; 488511SN/A 4898852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(new_name, p->getSyscallArg(tc, index))) 4901458SN/A return -EFAULT; 491511SN/A 4923669Sbinkertn@umich.edu // Adjust path for current working directory 4933669Sbinkertn@umich.edu old_name = p->fullPath(old_name); 4943669Sbinkertn@umich.edu new_name = p->fullPath(new_name); 4953669Sbinkertn@umich.edu 4961706SN/A int64_t result = rename(old_name.c_str(), new_name.c_str()); 4971458SN/A return (result == -1) ? -errno : result; 498511SN/A} 499511SN/A 5001706SN/ASyscallReturn 50111851Sbrandon.potter@amd.comtruncateFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 5021706SN/A{ 5031706SN/A string path; 5041706SN/A 5056701Sgblack@eecs.umich.edu int index = 0; 5068852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, p->getSyscallArg(tc, index))) 5071706SN/A return -EFAULT; 5081706SN/A 5096701Sgblack@eecs.umich.edu off_t length = p->getSyscallArg(tc, index); 5101706SN/A 5113669Sbinkertn@umich.edu // Adjust path for current working directory 5123669Sbinkertn@umich.edu path = p->fullPath(path); 5133669Sbinkertn@umich.edu 5141706SN/A int result = truncate(path.c_str(), length); 5151706SN/A return (result == -1) ? -errno : result; 5161706SN/A} 5171706SN/A 5181706SN/ASyscallReturn 51911856Sbrandon.potter@amd.comftruncateFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 5201706SN/A{ 5216701Sgblack@eecs.umich.edu int index = 0; 52211856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 52311856Sbrandon.potter@amd.com off_t length = p->getSyscallArg(tc, index); 5241706SN/A 52511856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 52611856Sbrandon.potter@amd.com if (!ffdp) 5271706SN/A return -EBADF; 52811856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 5291706SN/A 53010931Sbrandon.potter@amd.com int result = ftruncate(sim_fd, length); 5311706SN/A return (result == -1) ? -errno : result; 5321706SN/A} 5331999SN/A 5341999SN/ASyscallReturn 5356703Svince@csl.cornell.edutruncate64Func(SyscallDesc *desc, int num, 53611851Sbrandon.potter@amd.com Process *process, ThreadContext *tc) 5376703Svince@csl.cornell.edu{ 5386703Svince@csl.cornell.edu int index = 0; 5396703Svince@csl.cornell.edu string path; 5406703Svince@csl.cornell.edu 5418852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, process->getSyscallArg(tc, index))) 5426703Svince@csl.cornell.edu return -EFAULT; 5436703Svince@csl.cornell.edu 5446744SAli.Saidi@arm.com int64_t length = process->getSyscallArg(tc, index, 64); 5456703Svince@csl.cornell.edu 5466703Svince@csl.cornell.edu // Adjust path for current working directory 5476703Svince@csl.cornell.edu path = process->fullPath(path); 5486703Svince@csl.cornell.edu 5496744SAli.Saidi@arm.com#if NO_STAT64 5506744SAli.Saidi@arm.com int result = truncate(path.c_str(), length); 5516744SAli.Saidi@arm.com#else 5526703Svince@csl.cornell.edu int result = truncate64(path.c_str(), length); 5536744SAli.Saidi@arm.com#endif 5546703Svince@csl.cornell.edu return (result == -1) ? -errno : result; 5556703Svince@csl.cornell.edu} 5566703Svince@csl.cornell.edu 5576703Svince@csl.cornell.eduSyscallReturn 55811856Sbrandon.potter@amd.comftruncate64Func(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 5596685Stjones1@inf.ed.ac.uk{ 5606701Sgblack@eecs.umich.edu int index = 0; 56111856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 56211856Sbrandon.potter@amd.com int64_t length = p->getSyscallArg(tc, index, 64); 5636685Stjones1@inf.ed.ac.uk 56411856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 56511856Sbrandon.potter@amd.com if (!ffdp) 5666685Stjones1@inf.ed.ac.uk return -EBADF; 56711856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 5686685Stjones1@inf.ed.ac.uk 5696744SAli.Saidi@arm.com#if NO_STAT64 57010931Sbrandon.potter@amd.com int result = ftruncate(sim_fd, length); 5716744SAli.Saidi@arm.com#else 57210931Sbrandon.potter@amd.com int result = ftruncate64(sim_fd, length); 5736744SAli.Saidi@arm.com#endif 5746685Stjones1@inf.ed.ac.uk return (result == -1) ? -errno : result; 5756685Stjones1@inf.ed.ac.uk} 5766685Stjones1@inf.ed.ac.uk 5776685Stjones1@inf.ed.ac.ukSyscallReturn 57811851Sbrandon.potter@amd.comumaskFunc(SyscallDesc *desc, int num, Process *process, ThreadContext *tc) 5795513SMichael.Adler@intel.com{ 5805513SMichael.Adler@intel.com // Letting the simulated program change the simulator's umask seems like 5815513SMichael.Adler@intel.com // a bad idea. Compromise by just returning the current umask but not 5825513SMichael.Adler@intel.com // changing anything. 5835513SMichael.Adler@intel.com mode_t oldMask = umask(0); 5845513SMichael.Adler@intel.com umask(oldMask); 5855521Snate@binkert.org return (int)oldMask; 5865513SMichael.Adler@intel.com} 5875513SMichael.Adler@intel.com 5885513SMichael.Adler@intel.comSyscallReturn 58911851Sbrandon.potter@amd.comchownFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 5901999SN/A{ 5911999SN/A string path; 5921999SN/A 5936701Sgblack@eecs.umich.edu int index = 0; 5948852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, p->getSyscallArg(tc, index))) 5951999SN/A return -EFAULT; 5961999SN/A 5971999SN/A /* XXX endianess */ 5986701Sgblack@eecs.umich.edu uint32_t owner = p->getSyscallArg(tc, index); 5991999SN/A uid_t hostOwner = owner; 6006701Sgblack@eecs.umich.edu uint32_t group = p->getSyscallArg(tc, index); 6011999SN/A gid_t hostGroup = group; 6021999SN/A 6033669Sbinkertn@umich.edu // Adjust path for current working directory 6043669Sbinkertn@umich.edu path = p->fullPath(path); 6053669Sbinkertn@umich.edu 6061999SN/A int result = chown(path.c_str(), hostOwner, hostGroup); 6071999SN/A return (result == -1) ? -errno : result; 6081999SN/A} 6091999SN/A 6101999SN/ASyscallReturn 61111856Sbrandon.potter@amd.comfchownFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 6121999SN/A{ 6136701Sgblack@eecs.umich.edu int index = 0; 61411856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 6151999SN/A 61611856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 61711856Sbrandon.potter@amd.com if (!ffdp) 6181999SN/A return -EBADF; 61911856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 6201999SN/A 6211999SN/A /* XXX endianess */ 62211856Sbrandon.potter@amd.com uint32_t owner = p->getSyscallArg(tc, index); 6231999SN/A uid_t hostOwner = owner; 62411856Sbrandon.potter@amd.com uint32_t group = p->getSyscallArg(tc, index); 6251999SN/A gid_t hostGroup = group; 6261999SN/A 62710931Sbrandon.potter@amd.com int result = fchown(sim_fd, hostOwner, hostGroup); 6281999SN/A return (result == -1) ? -errno : result; 6291999SN/A} 6302093SN/A 6312093SN/A 63211856Sbrandon.potter@amd.com/** 63311856Sbrandon.potter@amd.com * TODO: there's a bit more involved here since file descriptors created with 63411856Sbrandon.potter@amd.com * dup are supposed to share a file description. So, there is a problem with 63511856Sbrandon.potter@amd.com * maintaining fields like file offset or flags since an update to such a 63611856Sbrandon.potter@amd.com * field won't be reflected in the metadata for the fd entries that we 63711856Sbrandon.potter@amd.com * maintain to hold metadata for checkpoint restoration. 63811856Sbrandon.potter@amd.com */ 6392093SN/ASyscallReturn 64011856Sbrandon.potter@amd.comdupFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 6413079Sstever@eecs.umich.edu{ 6426701Sgblack@eecs.umich.edu int index = 0; 64311856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 64410931Sbrandon.potter@amd.com 64511856Sbrandon.potter@amd.com auto old_hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 64611856Sbrandon.potter@amd.com if (!old_hbfdp) 6473079Sstever@eecs.umich.edu return -EBADF; 64811856Sbrandon.potter@amd.com int sim_fd = old_hbfdp->getSimFD(); 6495282Srstrong@cs.ucsd.edu 65010781Snilay@cs.wisc.edu int result = dup(sim_fd); 65111856Sbrandon.potter@amd.com int local_errno = errno; 65211856Sbrandon.potter@amd.com 65311856Sbrandon.potter@amd.com std::shared_ptr<FDEntry> new_fdep = old_hbfdp->clone(); 65411856Sbrandon.potter@amd.com auto new_hbfdp = std::dynamic_pointer_cast<HBFDEntry>(new_fdep); 65511856Sbrandon.potter@amd.com new_hbfdp->setSimFD(result); 65611856Sbrandon.potter@amd.com 65711856Sbrandon.potter@amd.com return (result == -1) ? -local_errno : p->fds->allocFD(new_fdep); 6583079Sstever@eecs.umich.edu} 6593079Sstever@eecs.umich.edu 6603079Sstever@eecs.umich.eduSyscallReturn 66111856Sbrandon.potter@amd.comfcntlFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 6622093SN/A{ 66311875Sbrandon.potter@amd.com int arg; 6646701Sgblack@eecs.umich.edu int index = 0; 66511856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 66611875Sbrandon.potter@amd.com int cmd = p->getSyscallArg(tc, index); 6672093SN/A 66811856Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 66911856Sbrandon.potter@amd.com if (!hbfdp) 6702093SN/A return -EBADF; 67111856Sbrandon.potter@amd.com int sim_fd = hbfdp->getSimFD(); 6722093SN/A 67311875Sbrandon.potter@amd.com int coe = hbfdp->getCOE(); 67411875Sbrandon.potter@amd.com 6752093SN/A switch (cmd) { 67611875Sbrandon.potter@amd.com case F_GETFD: 67711875Sbrandon.potter@amd.com return coe & FD_CLOEXEC; 6782093SN/A 67911875Sbrandon.potter@amd.com case F_SETFD: { 68011875Sbrandon.potter@amd.com arg = p->getSyscallArg(tc, index); 68111875Sbrandon.potter@amd.com arg ? hbfdp->setCOE(true) : hbfdp->setCOE(false); 6822093SN/A return 0; 68311875Sbrandon.potter@amd.com } 6842093SN/A 68511875Sbrandon.potter@amd.com // Rely on the host to maintain the file status flags for this file 68611875Sbrandon.potter@amd.com // description rather than maintain it ourselves. Admittedly, this 68711875Sbrandon.potter@amd.com // is suboptimal (and possibly error prone), but it is difficult to 68811875Sbrandon.potter@amd.com // maintain the flags by tracking them across the different descriptors 68911875Sbrandon.potter@amd.com // (that refer to this file description) caused by clone, dup, and 69011875Sbrandon.potter@amd.com // subsequent fcntls. 69111875Sbrandon.potter@amd.com case F_GETFL: 69211875Sbrandon.potter@amd.com case F_SETFL: { 69311875Sbrandon.potter@amd.com arg = p->getSyscallArg(tc, index); 69411875Sbrandon.potter@amd.com int rv = fcntl(sim_fd, cmd, arg); 69511875Sbrandon.potter@amd.com return (rv == -1) ? -errno : rv; 69611875Sbrandon.potter@amd.com } 6972093SN/A 6982093SN/A default: 69911875Sbrandon.potter@amd.com warn("fcntl: unsupported command %d\n", cmd); 7002093SN/A return 0; 7012093SN/A } 7022093SN/A} 7032093SN/A 7042238SN/ASyscallReturn 70511856Sbrandon.potter@amd.comfcntl64Func(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 7062687Sksewell@umich.edu{ 7076701Sgblack@eecs.umich.edu int index = 0; 70811856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 7092687Sksewell@umich.edu 71011856Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 71111856Sbrandon.potter@amd.com if (!hbfdp) 7122687Sksewell@umich.edu return -EBADF; 71311856Sbrandon.potter@amd.com int sim_fd = hbfdp->getSimFD(); 7142687Sksewell@umich.edu 71511856Sbrandon.potter@amd.com int cmd = p->getSyscallArg(tc, index); 7162687Sksewell@umich.edu switch (cmd) { 7172687Sksewell@umich.edu case 33: //F_GETLK64 71810931Sbrandon.potter@amd.com warn("fcntl64(%d, F_GETLK64) not supported, error returned\n", tgt_fd); 7192687Sksewell@umich.edu return -EMFILE; 7202687Sksewell@umich.edu 7212687Sksewell@umich.edu case 34: // F_SETLK64 7222687Sksewell@umich.edu case 35: // F_SETLKW64 72310931Sbrandon.potter@amd.com warn("fcntl64(%d, F_SETLK(W)64) not supported, error returned\n", 72410931Sbrandon.potter@amd.com tgt_fd); 7252687Sksewell@umich.edu return -EMFILE; 7262687Sksewell@umich.edu 7272687Sksewell@umich.edu default: 7282687Sksewell@umich.edu // not sure if this is totally valid, but we'll pass it through 7292687Sksewell@umich.edu // to the underlying OS 73010931Sbrandon.potter@amd.com warn("fcntl64(%d, %d) passed through to host\n", tgt_fd, cmd); 73110931Sbrandon.potter@amd.com return fcntl(sim_fd, cmd); 7322687Sksewell@umich.edu // return 0; 7332687Sksewell@umich.edu } 7342687Sksewell@umich.edu} 7352687Sksewell@umich.edu 7362687Sksewell@umich.eduSyscallReturn 73711851Sbrandon.potter@amd.compipePseudoFunc(SyscallDesc *desc, int callnum, Process *process, 73811851Sbrandon.potter@amd.com ThreadContext *tc) 7392238SN/A{ 74011856Sbrandon.potter@amd.com int sim_fds[2], tgt_fds[2]; 7412093SN/A 74211856Sbrandon.potter@amd.com int pipe_retval = pipe(sim_fds); 74311856Sbrandon.potter@amd.com if (pipe_retval < 0) 7442238SN/A return pipe_retval; 7452238SN/A 74611856Sbrandon.potter@amd.com auto rend = PipeFDEntry::EndType::read; 74711856Sbrandon.potter@amd.com auto rpfd = std::make_shared<PipeFDEntry>(sim_fds[0], O_WRONLY, rend); 7482238SN/A 74911856Sbrandon.potter@amd.com auto wend = PipeFDEntry::EndType::write; 75011856Sbrandon.potter@amd.com auto wpfd = std::make_shared<PipeFDEntry>(sim_fds[1], O_RDONLY, wend); 75111856Sbrandon.potter@amd.com 75211856Sbrandon.potter@amd.com tgt_fds[0] = process->fds->allocFD(rpfd); 75311856Sbrandon.potter@amd.com tgt_fds[1] = process->fds->allocFD(wpfd); 75411856Sbrandon.potter@amd.com 75511856Sbrandon.potter@amd.com /** 75611856Sbrandon.potter@amd.com * Now patch the read object to record the target file descriptor chosen 75711856Sbrandon.potter@amd.com * as the write end of the pipe. 75811856Sbrandon.potter@amd.com */ 75911856Sbrandon.potter@amd.com rpfd->setPipeReadSource(tgt_fds[1]); 76011856Sbrandon.potter@amd.com 76111856Sbrandon.potter@amd.com /** 76211856Sbrandon.potter@amd.com * Alpha Linux convention for pipe() is that fd[0] is returned as 76311856Sbrandon.potter@amd.com * the return value of the function, and fd[1] is returned in r20. 76411856Sbrandon.potter@amd.com */ 76511856Sbrandon.potter@amd.com tc->setIntReg(SyscallPseudoReturnReg, tgt_fds[1]); 7662238SN/A return sim_fds[0]; 7672238SN/A} 7682238SN/A 76911885Sbrandon.potter@amd.comSyscallReturn 77011885Sbrandon.potter@amd.comsetpgidFunc(SyscallDesc *desc, int callnum, Process *process, 77111885Sbrandon.potter@amd.com ThreadContext *tc) 77211885Sbrandon.potter@amd.com{ 77311885Sbrandon.potter@amd.com int index = 0; 77411885Sbrandon.potter@amd.com int pid = process->getSyscallArg(tc, index); 77511885Sbrandon.potter@amd.com int pgid = process->getSyscallArg(tc, index); 77611885Sbrandon.potter@amd.com 77711885Sbrandon.potter@amd.com if (pgid < 0) 77811885Sbrandon.potter@amd.com return -EINVAL; 77911885Sbrandon.potter@amd.com 78011885Sbrandon.potter@amd.com if (pid == 0) { 78111885Sbrandon.potter@amd.com process->setpgid(process->pid()); 78211885Sbrandon.potter@amd.com return 0; 78311885Sbrandon.potter@amd.com } 78411885Sbrandon.potter@amd.com 78511885Sbrandon.potter@amd.com Process *matched_ph = NULL; 78611885Sbrandon.potter@amd.com System *sysh = tc->getSystemPtr(); 78711885Sbrandon.potter@amd.com 78811885Sbrandon.potter@amd.com // Retrieves process pointer from active/suspended thread contexts. 78911885Sbrandon.potter@amd.com for (int i = 0; i < sysh->numContexts(); i++) { 79011885Sbrandon.potter@amd.com if (sysh->threadContexts[i]->status() != ThreadContext::Halted) { 79111885Sbrandon.potter@amd.com Process *temp_h = sysh->threadContexts[i]->getProcessPtr(); 79211885Sbrandon.potter@amd.com Process *walk_ph = (Process*)temp_h; 79311885Sbrandon.potter@amd.com 79411885Sbrandon.potter@amd.com if (walk_ph && walk_ph->pid() == process->pid()) 79511885Sbrandon.potter@amd.com matched_ph = walk_ph; 79611885Sbrandon.potter@amd.com } 79711885Sbrandon.potter@amd.com } 79811885Sbrandon.potter@amd.com 79911885Sbrandon.potter@amd.com assert(matched_ph != NULL); 80011885Sbrandon.potter@amd.com matched_ph->setpgid((pgid == 0) ? matched_ph->pid() : pgid); 80111885Sbrandon.potter@amd.com 80211885Sbrandon.potter@amd.com return 0; 80311885Sbrandon.potter@amd.com} 8042238SN/A 8052238SN/ASyscallReturn 80611851Sbrandon.potter@amd.comgetpidPseudoFunc(SyscallDesc *desc, int callnum, Process *process, 80711851Sbrandon.potter@amd.com ThreadContext *tc) 8082238SN/A{ 8092238SN/A // Make up a PID. There's no interprocess communication in 8102238SN/A // fake_syscall mode, so there's no way for a process to know it's 8112238SN/A // not getting a unique value. 8122238SN/A 8133114Sgblack@eecs.umich.edu tc->setIntReg(SyscallPseudoReturnReg, process->ppid()); 8143114Sgblack@eecs.umich.edu return process->pid(); 8152238SN/A} 8162238SN/A 8172238SN/A 8182238SN/ASyscallReturn 81911851Sbrandon.potter@amd.comgetuidPseudoFunc(SyscallDesc *desc, int callnum, Process *process, 82011851Sbrandon.potter@amd.com ThreadContext *tc) 8212238SN/A{ 8222238SN/A // Make up a UID and EUID... it shouldn't matter, and we want the 8232238SN/A // simulation to be deterministic. 8242238SN/A 8252238SN/A // EUID goes in r20. 8263114Sgblack@eecs.umich.edu tc->setIntReg(SyscallPseudoReturnReg, process->euid()); //EUID 8275543Ssaidi@eecs.umich.edu return process->uid(); // UID 8282238SN/A} 8292238SN/A 8302238SN/A 8312238SN/ASyscallReturn 83211851Sbrandon.potter@amd.comgetgidPseudoFunc(SyscallDesc *desc, int callnum, Process *process, 83311851Sbrandon.potter@amd.com ThreadContext *tc) 8342238SN/A{ 8352238SN/A // Get current group ID. EGID goes in r20. 8363114Sgblack@eecs.umich.edu tc->setIntReg(SyscallPseudoReturnReg, process->egid()); //EGID 8373114Sgblack@eecs.umich.edu return process->gid(); 8382238SN/A} 8392238SN/A 8402238SN/A 8412238SN/ASyscallReturn 84211851Sbrandon.potter@amd.comsetuidFunc(SyscallDesc *desc, int callnum, Process *process, 8432680Sktlim@umich.edu ThreadContext *tc) 8442238SN/A{ 8452238SN/A // can't fathom why a benchmark would call this. 8466701Sgblack@eecs.umich.edu int index = 0; 8476701Sgblack@eecs.umich.edu warn("Ignoring call to setuid(%d)\n", process->getSyscallArg(tc, index)); 8482238SN/A return 0; 8492238SN/A} 8502238SN/A 8512238SN/ASyscallReturn 85211851Sbrandon.potter@amd.comgetpidFunc(SyscallDesc *desc, int callnum, Process *process, 8532680Sktlim@umich.edu ThreadContext *tc) 8542238SN/A{ 85511885Sbrandon.potter@amd.com return process->tgid(); 85611885Sbrandon.potter@amd.com} 8572238SN/A 85811885Sbrandon.potter@amd.comSyscallReturn 85911885Sbrandon.potter@amd.comgettidFunc(SyscallDesc *desc, int callnum, Process *process, 86011885Sbrandon.potter@amd.com ThreadContext *tc) 86111885Sbrandon.potter@amd.com{ 8623114Sgblack@eecs.umich.edu return process->pid(); 8632238SN/A} 8642238SN/A 8652238SN/ASyscallReturn 86611851Sbrandon.potter@amd.comgetppidFunc(SyscallDesc *desc, int callnum, Process *process, 86711851Sbrandon.potter@amd.com ThreadContext *tc) 8682238SN/A{ 8693114Sgblack@eecs.umich.edu return process->ppid(); 8702238SN/A} 8712238SN/A 8722238SN/ASyscallReturn 87311851Sbrandon.potter@amd.comgetuidFunc(SyscallDesc *desc, int callnum, Process *process, 8742680Sktlim@umich.edu ThreadContext *tc) 8752238SN/A{ 8765543Ssaidi@eecs.umich.edu return process->uid(); // UID 8772238SN/A} 8782238SN/A 8792238SN/ASyscallReturn 88011851Sbrandon.potter@amd.comgeteuidFunc(SyscallDesc *desc, int callnum, Process *process, 88111851Sbrandon.potter@amd.com ThreadContext *tc) 8822238SN/A{ 8835543Ssaidi@eecs.umich.edu return process->euid(); // UID 8842238SN/A} 8852238SN/A 8862238SN/ASyscallReturn 88711851Sbrandon.potter@amd.comgetgidFunc(SyscallDesc *desc, int callnum, Process *process, 8882680Sktlim@umich.edu ThreadContext *tc) 8892238SN/A{ 8903114Sgblack@eecs.umich.edu return process->gid(); 8912238SN/A} 8922238SN/A 8932238SN/ASyscallReturn 89411851Sbrandon.potter@amd.comgetegidFunc(SyscallDesc *desc, int callnum, Process *process, 89511851Sbrandon.potter@amd.com ThreadContext *tc) 8962238SN/A{ 8973114Sgblack@eecs.umich.edu return process->egid(); 8982238SN/A} 8992238SN/A 9009455Smitch.hayenga+gem5@gmail.comSyscallReturn 90111856Sbrandon.potter@amd.comfallocateFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 90211760Sbrandon.potter@amd.com{ 90311799Sbrandon.potter@amd.com#if NO_FALLOCATE 90411799Sbrandon.potter@amd.com warn("Host OS cannot support calls to fallocate. Ignoring syscall"); 90511799Sbrandon.potter@amd.com#else 90611760Sbrandon.potter@amd.com int index = 0; 90711856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 90811856Sbrandon.potter@amd.com int mode = p->getSyscallArg(tc, index); 90911856Sbrandon.potter@amd.com off_t offset = p->getSyscallArg(tc, index); 91011856Sbrandon.potter@amd.com off_t len = p->getSyscallArg(tc, index); 91111760Sbrandon.potter@amd.com 91211856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 91311856Sbrandon.potter@amd.com if (!ffdp) 91411760Sbrandon.potter@amd.com return -EBADF; 91511856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 91611760Sbrandon.potter@amd.com 91711760Sbrandon.potter@amd.com int result = fallocate(sim_fd, mode, offset, len); 91811760Sbrandon.potter@amd.com if (result < 0) 91911760Sbrandon.potter@amd.com return -errno; 92011799Sbrandon.potter@amd.com#endif 92111760Sbrandon.potter@amd.com return 0; 92211760Sbrandon.potter@amd.com} 92311760Sbrandon.potter@amd.com 92411760Sbrandon.potter@amd.comSyscallReturn 92511851Sbrandon.potter@amd.comaccessFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc, 92611851Sbrandon.potter@amd.com int index) 9279455Smitch.hayenga+gem5@gmail.com{ 9289455Smitch.hayenga+gem5@gmail.com string path; 9299455Smitch.hayenga+gem5@gmail.com if (!tc->getMemProxy().tryReadString(path, p->getSyscallArg(tc, index))) 93010223Ssteve.reinhardt@amd.com return -EFAULT; 9319455Smitch.hayenga+gem5@gmail.com 9329455Smitch.hayenga+gem5@gmail.com // Adjust path for current working directory 9339455Smitch.hayenga+gem5@gmail.com path = p->fullPath(path); 9349455Smitch.hayenga+gem5@gmail.com 9359455Smitch.hayenga+gem5@gmail.com mode_t mode = p->getSyscallArg(tc, index); 9369455Smitch.hayenga+gem5@gmail.com 9379455Smitch.hayenga+gem5@gmail.com int result = access(path.c_str(), mode); 9389455Smitch.hayenga+gem5@gmail.com return (result == -1) ? -errno : result; 9399455Smitch.hayenga+gem5@gmail.com} 94010203SAli.Saidi@ARM.com 94110203SAli.Saidi@ARM.comSyscallReturn 94211851Sbrandon.potter@amd.comaccessFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 94310203SAli.Saidi@ARM.com{ 94410203SAli.Saidi@ARM.com return accessFunc(desc, callnum, p, tc, 0); 94510203SAli.Saidi@ARM.com} 94610203SAli.Saidi@ARM.com 947