syscall_emul.cc revision 10318
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 322093SN/A#include <fcntl.h> 33360SN/A#include <unistd.h> 34360SN/A 356712Snate@binkert.org#include <cstdio> 366712Snate@binkert.org#include <iostream> 37360SN/A#include <string> 38360SN/A 397680Sgblack@eecs.umich.edu#include "arch/utility.hh" 402474SN/A#include "base/chunk_generator.hh" 41360SN/A#include "base/trace.hh" 426658Snate@binkert.org#include "config/the_isa.hh" 438229Snate@binkert.org#include "cpu/base.hh" 442680Sktlim@umich.edu#include "cpu/thread_context.hh" 458232Snate@binkert.org#include "debug/SyscallVerbose.hh" 462474SN/A#include "mem/page_table.hh" 47360SN/A#include "sim/process.hh" 488229Snate@binkert.org#include "sim/sim_exit.hh" 498229Snate@binkert.org#include "sim/syscall_emul.hh" 506029Ssteve.reinhardt@amd.com#include "sim/system.hh" 51360SN/A 52360SN/Ausing namespace std; 532107SN/Ausing namespace TheISA; 54360SN/A 55360SN/Avoid 563114Sgblack@eecs.umich.eduSyscallDesc::doSyscall(int callnum, LiveProcess *process, ThreadContext *tc) 57360SN/A{ 5810253Ssteve.reinhardt@amd.com if (DTRACE(SyscallVerbose)) { 5910253Ssteve.reinhardt@amd.com int index = 0; 6010257Ssteve.reinhardt@amd.com IntReg arg[4] M5_VAR_USED; 6110253Ssteve.reinhardt@amd.com 6210253Ssteve.reinhardt@amd.com // we can't just put the calls to getSyscallArg() in the 6310253Ssteve.reinhardt@amd.com // DPRINTF arg list, because C++ doesn't guarantee their order 6410253Ssteve.reinhardt@amd.com for (int i = 0; i < 4; ++i) 6510253Ssteve.reinhardt@amd.com arg[i] = process->getSyscallArg(tc, index); 6610253Ssteve.reinhardt@amd.com 6710253Ssteve.reinhardt@amd.com DPRINTFNR("%d: %s: syscall %s called w/arguments %d,%d,%d,%d\n", 6810253Ssteve.reinhardt@amd.com curTick(), tc->getCpuPtr()->name(), name, 6910253Ssteve.reinhardt@amd.com arg[0], arg[1], arg[2], arg[3]); 7010253Ssteve.reinhardt@amd.com } 71360SN/A 722680Sktlim@umich.edu SyscallReturn retval = (*funcPtr)(this, callnum, process, tc); 73360SN/A 742495SN/A DPRINTFR(SyscallVerbose, "%d: %s: syscall %s returns %d\n", 7510223Ssteve.reinhardt@amd.com curTick(), tc->getCpuPtr()->name(), name, retval.encodedValue()); 76360SN/A 771450SN/A if (!(flags & SyscallDesc::SuppressReturnValue)) 785958Sgblack@eecs.umich.edu process->setSyscallReturn(tc, retval); 79360SN/A} 80360SN/A 81360SN/A 821450SN/ASyscallReturn 833114Sgblack@eecs.umich.eduunimplementedFunc(SyscallDesc *desc, int callnum, LiveProcess *process, 842680Sktlim@umich.edu ThreadContext *tc) 85360SN/A{ 861969SN/A fatal("syscall %s (#%d) unimplemented.", desc->name, callnum); 872484SN/A 882484SN/A return 1; 89360SN/A} 90360SN/A 91360SN/A 921450SN/ASyscallReturn 933114Sgblack@eecs.umich.eduignoreFunc(SyscallDesc *desc, int callnum, LiveProcess *process, 942680Sktlim@umich.edu ThreadContext *tc) 95360SN/A{ 966701Sgblack@eecs.umich.edu int index = 0; 9710253Ssteve.reinhardt@amd.com warn("ignoring syscall %s(%d, ...)", desc->name, 9810253Ssteve.reinhardt@amd.com process->getSyscallArg(tc, index)); 99360SN/A 1001458SN/A return 0; 101360SN/A} 102360SN/A 103360SN/A 1041450SN/ASyscallReturn 1058149SChris.Emmons@ARM.comignoreWarnOnceFunc(SyscallDesc *desc, int callnum, LiveProcess *process, 1068149SChris.Emmons@ARM.com ThreadContext *tc) 1078149SChris.Emmons@ARM.com{ 1088149SChris.Emmons@ARM.com int index = 0; 10910253Ssteve.reinhardt@amd.com warn_once("ignoring syscall %s(%d, ...)", desc->name, 11010253Ssteve.reinhardt@amd.com process->getSyscallArg(tc, index)); 1118149SChris.Emmons@ARM.com 1128149SChris.Emmons@ARM.com return 0; 1138149SChris.Emmons@ARM.com} 1148149SChris.Emmons@ARM.com 1158149SChris.Emmons@ARM.com 1168149SChris.Emmons@ARM.comSyscallReturn 1173114Sgblack@eecs.umich.eduexitFunc(SyscallDesc *desc, int callnum, LiveProcess *process, 1182680Sktlim@umich.edu ThreadContext *tc) 119360SN/A{ 1206029Ssteve.reinhardt@amd.com if (process->system->numRunningContexts() == 1) { 1216029Ssteve.reinhardt@amd.com // Last running context... exit simulator 1226701Sgblack@eecs.umich.edu int index = 0; 1235958Sgblack@eecs.umich.edu exitSimLoop("target called exit()", 1246701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index) & 0xff); 1256029Ssteve.reinhardt@amd.com } else { 1266029Ssteve.reinhardt@amd.com // other running threads... just halt this one 1276029Ssteve.reinhardt@amd.com tc->halt(); 1282834Sksewell@umich.edu } 129360SN/A 1301458SN/A return 1; 131360SN/A} 132360SN/A 133360SN/A 1341450SN/ASyscallReturn 1356109Ssanchezd@stanford.eduexitGroupFunc(SyscallDesc *desc, int callnum, LiveProcess *process, 1366109Ssanchezd@stanford.edu ThreadContext *tc) 1376109Ssanchezd@stanford.edu{ 1386109Ssanchezd@stanford.edu // really should just halt all thread contexts belonging to this 1396109Ssanchezd@stanford.edu // process in case there's another process running... 1406701Sgblack@eecs.umich.edu int index = 0; 1416109Ssanchezd@stanford.edu exitSimLoop("target called exit()", 1426701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index) & 0xff); 1436109Ssanchezd@stanford.edu 1446109Ssanchezd@stanford.edu return 1; 1456109Ssanchezd@stanford.edu} 1466109Ssanchezd@stanford.edu 1476109Ssanchezd@stanford.edu 1486109Ssanchezd@stanford.eduSyscallReturn 1493114Sgblack@eecs.umich.edugetpagesizeFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc) 150360SN/A{ 15110318Sandreas.hansson@arm.com return (int)PageBytes; 152360SN/A} 153360SN/A 154360SN/A 1551450SN/ASyscallReturn 1565748SSteve.Reinhardt@amd.combrkFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc) 157360SN/A{ 158360SN/A // change brk addr to first arg 1596701Sgblack@eecs.umich.edu int index = 0; 1606701Sgblack@eecs.umich.edu Addr new_brk = p->getSyscallArg(tc, index); 1615748SSteve.Reinhardt@amd.com 1625748SSteve.Reinhardt@amd.com // in Linux at least, brk(0) returns the current break value 1635748SSteve.Reinhardt@amd.com // (note that the syscall and the glibc function have different behavior) 1645748SSteve.Reinhardt@amd.com if (new_brk == 0) 1655748SSteve.Reinhardt@amd.com return p->brk_point; 1665748SSteve.Reinhardt@amd.com 1675748SSteve.Reinhardt@amd.com if (new_brk > p->brk_point) { 1685748SSteve.Reinhardt@amd.com // might need to allocate some new pages 1692474SN/A for (ChunkGenerator gen(p->brk_point, new_brk - p->brk_point, 17010318Sandreas.hansson@arm.com PageBytes); !gen.done(); gen.next()) { 1715748SSteve.Reinhardt@amd.com if (!p->pTable->translate(gen.addr())) 17210318Sandreas.hansson@arm.com p->allocateMem(roundDown(gen.addr(), PageBytes), PageBytes); 1736687Stjones1@inf.ed.ac.uk 1746687Stjones1@inf.ed.ac.uk // if the address is already there, zero it out 1756687Stjones1@inf.ed.ac.uk else { 1766687Stjones1@inf.ed.ac.uk uint8_t zero = 0; 1778852Sandreas.hansson@arm.com SETranslatingPortProxy &tp = tc->getMemProxy(); 1786687Stjones1@inf.ed.ac.uk 1796687Stjones1@inf.ed.ac.uk // split non-page aligned accesses 18010318Sandreas.hansson@arm.com Addr next_page = roundUp(gen.addr(), PageBytes); 1816687Stjones1@inf.ed.ac.uk uint32_t size_needed = next_page - gen.addr(); 1828852Sandreas.hansson@arm.com tp.memsetBlob(gen.addr(), zero, size_needed); 18310318Sandreas.hansson@arm.com if (gen.addr() + PageBytes > next_page && 1846687Stjones1@inf.ed.ac.uk next_page < new_brk && 1856687Stjones1@inf.ed.ac.uk p->pTable->translate(next_page)) 1866687Stjones1@inf.ed.ac.uk { 18710318Sandreas.hansson@arm.com size_needed = PageBytes - size_needed; 1888852Sandreas.hansson@arm.com tp.memsetBlob(next_page, zero, size_needed); 1896687Stjones1@inf.ed.ac.uk } 1906687Stjones1@inf.ed.ac.uk } 1912474SN/A } 1921450SN/A } 1935748SSteve.Reinhardt@amd.com 1945748SSteve.Reinhardt@amd.com p->brk_point = new_brk; 1951458SN/A DPRINTF(SyscallVerbose, "Break Point changed to: %#X\n", p->brk_point); 1961458SN/A return p->brk_point; 197360SN/A} 198360SN/A 199360SN/A 2001450SN/ASyscallReturn 2013114Sgblack@eecs.umich.educloseFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc) 202360SN/A{ 2036701Sgblack@eecs.umich.edu int index = 0; 2046701Sgblack@eecs.umich.edu int target_fd = p->getSyscallArg(tc, index); 2057508Stjones1@inf.ed.ac.uk int sim_fd = p->sim_fd(target_fd); 2067508Stjones1@inf.ed.ac.uk int status = 0; 2077508Stjones1@inf.ed.ac.uk if (sim_fd > 2) 2087508Stjones1@inf.ed.ac.uk status = close(sim_fd); 2091970SN/A if (status >= 0) 2101970SN/A p->free_fd(target_fd); 2111970SN/A return status; 212360SN/A} 213360SN/A 214360SN/A 2151450SN/ASyscallReturn 2163114Sgblack@eecs.umich.edureadFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc) 217360SN/A{ 2186701Sgblack@eecs.umich.edu int index = 0; 2196701Sgblack@eecs.umich.edu int fd = p->sim_fd(p->getSyscallArg(tc, index)); 2206701Sgblack@eecs.umich.edu Addr bufPtr = p->getSyscallArg(tc, index); 2216701Sgblack@eecs.umich.edu int nbytes = p->getSyscallArg(tc, index); 2226701Sgblack@eecs.umich.edu BufferArg bufArg(bufPtr, nbytes); 223360SN/A 224360SN/A int bytes_read = read(fd, bufArg.bufferPtr(), nbytes); 225360SN/A 226360SN/A if (bytes_read != -1) 2278706Sandreas.hansson@arm.com bufArg.copyOut(tc->getMemProxy()); 228360SN/A 2291458SN/A return bytes_read; 230360SN/A} 231360SN/A 2321450SN/ASyscallReturn 2333114Sgblack@eecs.umich.eduwriteFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc) 234360SN/A{ 2356701Sgblack@eecs.umich.edu int index = 0; 2366701Sgblack@eecs.umich.edu int fd = p->sim_fd(p->getSyscallArg(tc, index)); 2376701Sgblack@eecs.umich.edu Addr bufPtr = p->getSyscallArg(tc, index); 2386701Sgblack@eecs.umich.edu int nbytes = p->getSyscallArg(tc, index); 2396701Sgblack@eecs.umich.edu BufferArg bufArg(bufPtr, nbytes); 240360SN/A 2418706Sandreas.hansson@arm.com bufArg.copyIn(tc->getMemProxy()); 242360SN/A 243360SN/A int bytes_written = write(fd, bufArg.bufferPtr(), nbytes); 244360SN/A 245360SN/A fsync(fd); 246360SN/A 2471458SN/A return bytes_written; 248360SN/A} 249360SN/A 250360SN/A 2511450SN/ASyscallReturn 2523114Sgblack@eecs.umich.edulseekFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc) 253360SN/A{ 2546701Sgblack@eecs.umich.edu int index = 0; 2556701Sgblack@eecs.umich.edu int fd = p->sim_fd(p->getSyscallArg(tc, index)); 2566701Sgblack@eecs.umich.edu uint64_t offs = p->getSyscallArg(tc, index); 2576701Sgblack@eecs.umich.edu int whence = p->getSyscallArg(tc, index); 258360SN/A 259360SN/A off_t result = lseek(fd, offs, whence); 260360SN/A 2611458SN/A return (result == (off_t)-1) ? -errno : result; 262360SN/A} 263360SN/A 264360SN/A 2651450SN/ASyscallReturn 2664118Sgblack@eecs.umich.edu_llseekFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc) 2674118Sgblack@eecs.umich.edu{ 2686701Sgblack@eecs.umich.edu int index = 0; 2696701Sgblack@eecs.umich.edu int fd = p->sim_fd(p->getSyscallArg(tc, index)); 2706701Sgblack@eecs.umich.edu uint64_t offset_high = p->getSyscallArg(tc, index); 2716701Sgblack@eecs.umich.edu uint32_t offset_low = p->getSyscallArg(tc, index); 2726701Sgblack@eecs.umich.edu Addr result_ptr = p->getSyscallArg(tc, index); 2736701Sgblack@eecs.umich.edu int whence = p->getSyscallArg(tc, index); 2744118Sgblack@eecs.umich.edu 2754118Sgblack@eecs.umich.edu uint64_t offset = (offset_high << 32) | offset_low; 2764118Sgblack@eecs.umich.edu 2774118Sgblack@eecs.umich.edu uint64_t result = lseek(fd, offset, whence); 2784118Sgblack@eecs.umich.edu result = TheISA::htog(result); 2794118Sgblack@eecs.umich.edu 2804118Sgblack@eecs.umich.edu if (result == (off_t)-1) { 2814118Sgblack@eecs.umich.edu //The seek failed. 2824118Sgblack@eecs.umich.edu return -errno; 2834118Sgblack@eecs.umich.edu } else { 2846111Ssteve.reinhardt@amd.com // The seek succeeded. 2856111Ssteve.reinhardt@amd.com // Copy "result" to "result_ptr" 2866111Ssteve.reinhardt@amd.com // XXX We'll assume that the size of loff_t is 64 bits on the 2876111Ssteve.reinhardt@amd.com // target platform 2884118Sgblack@eecs.umich.edu BufferArg result_buf(result_ptr, sizeof(result)); 2894118Sgblack@eecs.umich.edu memcpy(result_buf.bufferPtr(), &result, sizeof(result)); 2908706Sandreas.hansson@arm.com result_buf.copyOut(tc->getMemProxy()); 2914118Sgblack@eecs.umich.edu return 0; 2924118Sgblack@eecs.umich.edu } 2934118Sgblack@eecs.umich.edu 2944118Sgblack@eecs.umich.edu 2954118Sgblack@eecs.umich.edu return (result == (off_t)-1) ? -errno : result; 2964118Sgblack@eecs.umich.edu} 2974118Sgblack@eecs.umich.edu 2984118Sgblack@eecs.umich.edu 2994118Sgblack@eecs.umich.eduSyscallReturn 3003114Sgblack@eecs.umich.edumunmapFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc) 301360SN/A{ 302360SN/A // given that we don't really implement mmap, munmap is really easy 3031458SN/A return 0; 304360SN/A} 305360SN/A 306360SN/A 307360SN/Aconst char *hostname = "m5.eecs.umich.edu"; 308360SN/A 3091450SN/ASyscallReturn 3103114Sgblack@eecs.umich.edugethostnameFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc) 311360SN/A{ 3126701Sgblack@eecs.umich.edu int index = 0; 3136701Sgblack@eecs.umich.edu Addr bufPtr = p->getSyscallArg(tc, index); 3146701Sgblack@eecs.umich.edu int name_len = p->getSyscallArg(tc, index); 3156701Sgblack@eecs.umich.edu BufferArg name(bufPtr, name_len); 316360SN/A 317360SN/A strncpy((char *)name.bufferPtr(), hostname, name_len); 318360SN/A 3198706Sandreas.hansson@arm.com name.copyOut(tc->getMemProxy()); 320360SN/A 3211458SN/A return 0; 322360SN/A} 323360SN/A 3241450SN/ASyscallReturn 3255513SMichael.Adler@intel.comgetcwdFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc) 3265513SMichael.Adler@intel.com{ 3275513SMichael.Adler@intel.com int result = 0; 3286731Svince@csl.cornell.edu int index = 0; 3296701Sgblack@eecs.umich.edu Addr bufPtr = p->getSyscallArg(tc, index); 3306701Sgblack@eecs.umich.edu unsigned long size = p->getSyscallArg(tc, index); 3316701Sgblack@eecs.umich.edu BufferArg buf(bufPtr, size); 3325513SMichael.Adler@intel.com 3335513SMichael.Adler@intel.com // Is current working directory defined? 3345513SMichael.Adler@intel.com string cwd = p->getcwd(); 3355513SMichael.Adler@intel.com if (!cwd.empty()) { 3365513SMichael.Adler@intel.com if (cwd.length() >= size) { 3375513SMichael.Adler@intel.com // Buffer too small 3385513SMichael.Adler@intel.com return -ERANGE; 3395513SMichael.Adler@intel.com } 3405513SMichael.Adler@intel.com strncpy((char *)buf.bufferPtr(), cwd.c_str(), size); 3415513SMichael.Adler@intel.com result = cwd.length(); 3425513SMichael.Adler@intel.com } 3435513SMichael.Adler@intel.com else { 3445513SMichael.Adler@intel.com if (getcwd((char *)buf.bufferPtr(), size) != NULL) { 3455513SMichael.Adler@intel.com result = strlen((char *)buf.bufferPtr()); 3465513SMichael.Adler@intel.com } 3475513SMichael.Adler@intel.com else { 3485513SMichael.Adler@intel.com result = -1; 3495513SMichael.Adler@intel.com } 3505513SMichael.Adler@intel.com } 3515513SMichael.Adler@intel.com 3528706Sandreas.hansson@arm.com buf.copyOut(tc->getMemProxy()); 3535513SMichael.Adler@intel.com 3545513SMichael.Adler@intel.com return (result == -1) ? -errno : result; 3555513SMichael.Adler@intel.com} 3565513SMichael.Adler@intel.com 35710203SAli.Saidi@ARM.com/// Target open() handler. 35810203SAli.Saidi@ARM.comSyscallReturn 35910203SAli.Saidi@ARM.comreadlinkFunc(SyscallDesc *desc, int callnum, LiveProcess *process, 36010203SAli.Saidi@ARM.com ThreadContext *tc) 36110203SAli.Saidi@ARM.com{ 36210203SAli.Saidi@ARM.com return readlinkFunc(desc, callnum, process, tc, 0); 36310203SAli.Saidi@ARM.com} 3645513SMichael.Adler@intel.com 3655513SMichael.Adler@intel.comSyscallReturn 36610203SAli.Saidi@ARM.comreadlinkFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc, 36710203SAli.Saidi@ARM.com int index) 3685513SMichael.Adler@intel.com{ 3695513SMichael.Adler@intel.com string path; 3705513SMichael.Adler@intel.com 3718852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, p->getSyscallArg(tc, index))) 37210223Ssteve.reinhardt@amd.com return -EFAULT; 3735513SMichael.Adler@intel.com 3745513SMichael.Adler@intel.com // Adjust path for current working directory 3755513SMichael.Adler@intel.com path = p->fullPath(path); 3765513SMichael.Adler@intel.com 3776701Sgblack@eecs.umich.edu Addr bufPtr = p->getSyscallArg(tc, index); 3786701Sgblack@eecs.umich.edu size_t bufsiz = p->getSyscallArg(tc, index); 3796701Sgblack@eecs.umich.edu 3806701Sgblack@eecs.umich.edu BufferArg buf(bufPtr, bufsiz); 3815513SMichael.Adler@intel.com 3825513SMichael.Adler@intel.com int result = readlink(path.c_str(), (char *)buf.bufferPtr(), bufsiz); 3835513SMichael.Adler@intel.com 3848706Sandreas.hansson@arm.com buf.copyOut(tc->getMemProxy()); 3855513SMichael.Adler@intel.com 3865513SMichael.Adler@intel.com return (result == -1) ? -errno : result; 3875513SMichael.Adler@intel.com} 3885513SMichael.Adler@intel.com 3895513SMichael.Adler@intel.comSyscallReturn 3903114Sgblack@eecs.umich.eduunlinkFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc) 391511SN/A{ 3921706SN/A string path; 393360SN/A 3946701Sgblack@eecs.umich.edu int index = 0; 3958852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, p->getSyscallArg(tc, index))) 39610223Ssteve.reinhardt@amd.com return -EFAULT; 397511SN/A 3983669Sbinkertn@umich.edu // Adjust path for current working directory 3993669Sbinkertn@umich.edu path = p->fullPath(path); 4003669Sbinkertn@umich.edu 401511SN/A int result = unlink(path.c_str()); 4021458SN/A return (result == -1) ? -errno : result; 403511SN/A} 404511SN/A 4055513SMichael.Adler@intel.com 4065513SMichael.Adler@intel.comSyscallReturn 4075513SMichael.Adler@intel.commkdirFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc) 4085513SMichael.Adler@intel.com{ 4095513SMichael.Adler@intel.com string path; 4105513SMichael.Adler@intel.com 4116701Sgblack@eecs.umich.edu int index = 0; 4128852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, p->getSyscallArg(tc, index))) 41310223Ssteve.reinhardt@amd.com return -EFAULT; 4145513SMichael.Adler@intel.com 4155513SMichael.Adler@intel.com // Adjust path for current working directory 4165513SMichael.Adler@intel.com path = p->fullPath(path); 4175513SMichael.Adler@intel.com 4186701Sgblack@eecs.umich.edu mode_t mode = p->getSyscallArg(tc, index); 4195513SMichael.Adler@intel.com 4205513SMichael.Adler@intel.com int result = mkdir(path.c_str(), mode); 4215513SMichael.Adler@intel.com return (result == -1) ? -errno : result; 4225513SMichael.Adler@intel.com} 4235513SMichael.Adler@intel.com 4241450SN/ASyscallReturn 4253114Sgblack@eecs.umich.edurenameFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc) 426511SN/A{ 4271706SN/A string old_name; 428511SN/A 4296701Sgblack@eecs.umich.edu int index = 0; 4308852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(old_name, p->getSyscallArg(tc, index))) 4311458SN/A return -EFAULT; 432511SN/A 4331706SN/A string new_name; 434511SN/A 4358852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(new_name, p->getSyscallArg(tc, index))) 4361458SN/A return -EFAULT; 437511SN/A 4383669Sbinkertn@umich.edu // Adjust path for current working directory 4393669Sbinkertn@umich.edu old_name = p->fullPath(old_name); 4403669Sbinkertn@umich.edu new_name = p->fullPath(new_name); 4413669Sbinkertn@umich.edu 4421706SN/A int64_t result = rename(old_name.c_str(), new_name.c_str()); 4431458SN/A return (result == -1) ? -errno : result; 444511SN/A} 445511SN/A 4461706SN/ASyscallReturn 4473114Sgblack@eecs.umich.edutruncateFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc) 4481706SN/A{ 4491706SN/A string path; 4501706SN/A 4516701Sgblack@eecs.umich.edu int index = 0; 4528852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, p->getSyscallArg(tc, index))) 4531706SN/A return -EFAULT; 4541706SN/A 4556701Sgblack@eecs.umich.edu off_t length = p->getSyscallArg(tc, index); 4561706SN/A 4573669Sbinkertn@umich.edu // Adjust path for current working directory 4583669Sbinkertn@umich.edu path = p->fullPath(path); 4593669Sbinkertn@umich.edu 4601706SN/A int result = truncate(path.c_str(), length); 4611706SN/A return (result == -1) ? -errno : result; 4621706SN/A} 4631706SN/A 4641706SN/ASyscallReturn 4656111Ssteve.reinhardt@amd.comftruncateFunc(SyscallDesc *desc, int num, 4666111Ssteve.reinhardt@amd.com LiveProcess *process, ThreadContext *tc) 4671706SN/A{ 4686701Sgblack@eecs.umich.edu int index = 0; 4696701Sgblack@eecs.umich.edu int fd = process->sim_fd(process->getSyscallArg(tc, index)); 4701706SN/A 4711706SN/A if (fd < 0) 4721706SN/A return -EBADF; 4731706SN/A 4746701Sgblack@eecs.umich.edu off_t length = process->getSyscallArg(tc, index); 4751706SN/A 4761706SN/A int result = ftruncate(fd, length); 4771706SN/A return (result == -1) ? -errno : result; 4781706SN/A} 4791999SN/A 4801999SN/ASyscallReturn 4816703Svince@csl.cornell.edutruncate64Func(SyscallDesc *desc, int num, 4826703Svince@csl.cornell.edu LiveProcess *process, ThreadContext *tc) 4836703Svince@csl.cornell.edu{ 4846703Svince@csl.cornell.edu int index = 0; 4856703Svince@csl.cornell.edu string path; 4866703Svince@csl.cornell.edu 4878852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, process->getSyscallArg(tc, index))) 4886703Svince@csl.cornell.edu return -EFAULT; 4896703Svince@csl.cornell.edu 4906744SAli.Saidi@arm.com int64_t length = process->getSyscallArg(tc, index, 64); 4916703Svince@csl.cornell.edu 4926703Svince@csl.cornell.edu // Adjust path for current working directory 4936703Svince@csl.cornell.edu path = process->fullPath(path); 4946703Svince@csl.cornell.edu 4956744SAli.Saidi@arm.com#if NO_STAT64 4966744SAli.Saidi@arm.com int result = truncate(path.c_str(), length); 4976744SAli.Saidi@arm.com#else 4986703Svince@csl.cornell.edu int result = truncate64(path.c_str(), length); 4996744SAli.Saidi@arm.com#endif 5006703Svince@csl.cornell.edu return (result == -1) ? -errno : result; 5016703Svince@csl.cornell.edu} 5026703Svince@csl.cornell.edu 5036703Svince@csl.cornell.eduSyscallReturn 5046685Stjones1@inf.ed.ac.ukftruncate64Func(SyscallDesc *desc, int num, 5056685Stjones1@inf.ed.ac.uk LiveProcess *process, ThreadContext *tc) 5066685Stjones1@inf.ed.ac.uk{ 5076701Sgblack@eecs.umich.edu int index = 0; 5086701Sgblack@eecs.umich.edu int fd = process->sim_fd(process->getSyscallArg(tc, index)); 5096685Stjones1@inf.ed.ac.uk 5106685Stjones1@inf.ed.ac.uk if (fd < 0) 5116685Stjones1@inf.ed.ac.uk return -EBADF; 5126685Stjones1@inf.ed.ac.uk 5136744SAli.Saidi@arm.com int64_t length = process->getSyscallArg(tc, index, 64); 5146685Stjones1@inf.ed.ac.uk 5156744SAli.Saidi@arm.com#if NO_STAT64 5166744SAli.Saidi@arm.com int result = ftruncate(fd, length); 5176744SAli.Saidi@arm.com#else 5186685Stjones1@inf.ed.ac.uk int result = ftruncate64(fd, length); 5196744SAli.Saidi@arm.com#endif 5206685Stjones1@inf.ed.ac.uk return (result == -1) ? -errno : result; 5216685Stjones1@inf.ed.ac.uk} 5226685Stjones1@inf.ed.ac.uk 5236685Stjones1@inf.ed.ac.ukSyscallReturn 5245513SMichael.Adler@intel.comumaskFunc(SyscallDesc *desc, int num, LiveProcess *process, ThreadContext *tc) 5255513SMichael.Adler@intel.com{ 5265513SMichael.Adler@intel.com // Letting the simulated program change the simulator's umask seems like 5275513SMichael.Adler@intel.com // a bad idea. Compromise by just returning the current umask but not 5285513SMichael.Adler@intel.com // changing anything. 5295513SMichael.Adler@intel.com mode_t oldMask = umask(0); 5305513SMichael.Adler@intel.com umask(oldMask); 5315521Snate@binkert.org return (int)oldMask; 5325513SMichael.Adler@intel.com} 5335513SMichael.Adler@intel.com 5345513SMichael.Adler@intel.comSyscallReturn 5353114Sgblack@eecs.umich.educhownFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc) 5361999SN/A{ 5371999SN/A string path; 5381999SN/A 5396701Sgblack@eecs.umich.edu int index = 0; 5408852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, p->getSyscallArg(tc, index))) 5411999SN/A return -EFAULT; 5421999SN/A 5431999SN/A /* XXX endianess */ 5446701Sgblack@eecs.umich.edu uint32_t owner = p->getSyscallArg(tc, index); 5451999SN/A uid_t hostOwner = owner; 5466701Sgblack@eecs.umich.edu uint32_t group = p->getSyscallArg(tc, index); 5471999SN/A gid_t hostGroup = group; 5481999SN/A 5493669Sbinkertn@umich.edu // Adjust path for current working directory 5503669Sbinkertn@umich.edu path = p->fullPath(path); 5513669Sbinkertn@umich.edu 5521999SN/A int result = chown(path.c_str(), hostOwner, hostGroup); 5531999SN/A return (result == -1) ? -errno : result; 5541999SN/A} 5551999SN/A 5561999SN/ASyscallReturn 5573114Sgblack@eecs.umich.edufchownFunc(SyscallDesc *desc, int num, LiveProcess *process, ThreadContext *tc) 5581999SN/A{ 5596701Sgblack@eecs.umich.edu int index = 0; 5606701Sgblack@eecs.umich.edu int fd = process->sim_fd(process->getSyscallArg(tc, index)); 5611999SN/A 5621999SN/A if (fd < 0) 5631999SN/A return -EBADF; 5641999SN/A 5651999SN/A /* XXX endianess */ 5666701Sgblack@eecs.umich.edu uint32_t owner = process->getSyscallArg(tc, index); 5671999SN/A uid_t hostOwner = owner; 5686701Sgblack@eecs.umich.edu uint32_t group = process->getSyscallArg(tc, index); 5691999SN/A gid_t hostGroup = group; 5701999SN/A 5711999SN/A int result = fchown(fd, hostOwner, hostGroup); 5721999SN/A return (result == -1) ? -errno : result; 5731999SN/A} 5742093SN/A 5752093SN/A 5762093SN/ASyscallReturn 5773114Sgblack@eecs.umich.edudupFunc(SyscallDesc *desc, int num, LiveProcess *process, ThreadContext *tc) 5783079Sstever@eecs.umich.edu{ 5796701Sgblack@eecs.umich.edu int index = 0; 5806701Sgblack@eecs.umich.edu int fd = process->sim_fd(process->getSyscallArg(tc, index)); 5813079Sstever@eecs.umich.edu if (fd < 0) 5823079Sstever@eecs.umich.edu return -EBADF; 5833079Sstever@eecs.umich.edu 5846701Sgblack@eecs.umich.edu Process::FdMap *fdo = process->sim_fd_obj(fd); 5855282Srstrong@cs.ucsd.edu 5863079Sstever@eecs.umich.edu int result = dup(fd); 5876111Ssteve.reinhardt@amd.com return (result == -1) ? -errno : 5886111Ssteve.reinhardt@amd.com process->alloc_fd(result, fdo->filename, fdo->flags, fdo->mode, false); 5893079Sstever@eecs.umich.edu} 5903079Sstever@eecs.umich.edu 5913079Sstever@eecs.umich.edu 5923079Sstever@eecs.umich.eduSyscallReturn 5933114Sgblack@eecs.umich.edufcntlFunc(SyscallDesc *desc, int num, LiveProcess *process, 5942680Sktlim@umich.edu ThreadContext *tc) 5952093SN/A{ 5966701Sgblack@eecs.umich.edu int index = 0; 5976701Sgblack@eecs.umich.edu int fd = process->getSyscallArg(tc, index); 5982093SN/A 5992093SN/A if (fd < 0 || process->sim_fd(fd) < 0) 6002093SN/A return -EBADF; 6012093SN/A 6026701Sgblack@eecs.umich.edu int cmd = process->getSyscallArg(tc, index); 6032093SN/A switch (cmd) { 6042093SN/A case 0: // F_DUPFD 6052093SN/A // if we really wanted to support this, we'd need to do it 6062093SN/A // in the target fd space. 6072093SN/A warn("fcntl(%d, F_DUPFD) not supported, error returned\n", fd); 6082093SN/A return -EMFILE; 6092093SN/A 6102093SN/A case 1: // F_GETFD (get close-on-exec flag) 6112093SN/A case 2: // F_SETFD (set close-on-exec flag) 6122093SN/A return 0; 6132093SN/A 6142093SN/A case 3: // F_GETFL (get file flags) 6152093SN/A case 4: // F_SETFL (set file flags) 6162093SN/A // not sure if this is totally valid, but we'll pass it through 6172093SN/A // to the underlying OS 6182093SN/A warn("fcntl(%d, %d) passed through to host\n", fd, cmd); 6192093SN/A return fcntl(process->sim_fd(fd), cmd); 6202093SN/A // return 0; 6212093SN/A 6222093SN/A case 7: // F_GETLK (get lock) 6232093SN/A case 8: // F_SETLK (set lock) 6242093SN/A case 9: // F_SETLKW (set lock and wait) 6252093SN/A // don't mess with file locking... just act like it's OK 6262093SN/A warn("File lock call (fcntl(%d, %d)) ignored.\n", fd, cmd); 6272093SN/A return 0; 6282093SN/A 6292093SN/A default: 6302093SN/A warn("Unknown fcntl command %d\n", cmd); 6312093SN/A return 0; 6322093SN/A } 6332093SN/A} 6342093SN/A 6352238SN/ASyscallReturn 6363114Sgblack@eecs.umich.edufcntl64Func(SyscallDesc *desc, int num, LiveProcess *process, 6372687Sksewell@umich.edu ThreadContext *tc) 6382687Sksewell@umich.edu{ 6396701Sgblack@eecs.umich.edu int index = 0; 6406701Sgblack@eecs.umich.edu int fd = process->getSyscallArg(tc, index); 6412687Sksewell@umich.edu 6422687Sksewell@umich.edu if (fd < 0 || process->sim_fd(fd) < 0) 6432687Sksewell@umich.edu return -EBADF; 6442687Sksewell@umich.edu 6456701Sgblack@eecs.umich.edu int cmd = process->getSyscallArg(tc, index); 6462687Sksewell@umich.edu switch (cmd) { 6472687Sksewell@umich.edu case 33: //F_GETLK64 6482687Sksewell@umich.edu warn("fcntl64(%d, F_GETLK64) not supported, error returned\n", fd); 6492687Sksewell@umich.edu return -EMFILE; 6502687Sksewell@umich.edu 6512687Sksewell@umich.edu case 34: // F_SETLK64 6522687Sksewell@umich.edu case 35: // F_SETLKW64 6532687Sksewell@umich.edu warn("fcntl64(%d, F_SETLK(W)64) not supported, error returned\n", fd); 6542687Sksewell@umich.edu return -EMFILE; 6552687Sksewell@umich.edu 6562687Sksewell@umich.edu default: 6572687Sksewell@umich.edu // not sure if this is totally valid, but we'll pass it through 6582687Sksewell@umich.edu // to the underlying OS 6592687Sksewell@umich.edu warn("fcntl64(%d, %d) passed through to host\n", fd, cmd); 6602687Sksewell@umich.edu return fcntl(process->sim_fd(fd), cmd); 6612687Sksewell@umich.edu // return 0; 6622687Sksewell@umich.edu } 6632687Sksewell@umich.edu} 6642687Sksewell@umich.edu 6652687Sksewell@umich.eduSyscallReturn 6663114Sgblack@eecs.umich.edupipePseudoFunc(SyscallDesc *desc, int callnum, LiveProcess *process, 6672680Sktlim@umich.edu ThreadContext *tc) 6682238SN/A{ 6692238SN/A int fds[2], sim_fds[2]; 6702238SN/A int pipe_retval = pipe(fds); 6712093SN/A 6722238SN/A if (pipe_retval < 0) { 6732238SN/A // error 6742238SN/A return pipe_retval; 6752238SN/A } 6762238SN/A 6775282Srstrong@cs.ucsd.edu sim_fds[0] = process->alloc_fd(fds[0], "PIPE-READ", O_WRONLY, -1, true); 6785282Srstrong@cs.ucsd.edu sim_fds[1] = process->alloc_fd(fds[1], "PIPE-WRITE", O_RDONLY, -1, true); 6792238SN/A 6805282Srstrong@cs.ucsd.edu process->setReadPipeSource(sim_fds[0], sim_fds[1]); 6812238SN/A // Alpha Linux convention for pipe() is that fd[0] is returned as 6822238SN/A // the return value of the function, and fd[1] is returned in r20. 6832680Sktlim@umich.edu tc->setIntReg(SyscallPseudoReturnReg, sim_fds[1]); 6842238SN/A return sim_fds[0]; 6852238SN/A} 6862238SN/A 6872238SN/A 6882238SN/ASyscallReturn 6893114Sgblack@eecs.umich.edugetpidPseudoFunc(SyscallDesc *desc, int callnum, LiveProcess *process, 6902680Sktlim@umich.edu ThreadContext *tc) 6912238SN/A{ 6922238SN/A // Make up a PID. There's no interprocess communication in 6932238SN/A // fake_syscall mode, so there's no way for a process to know it's 6942238SN/A // not getting a unique value. 6952238SN/A 6963114Sgblack@eecs.umich.edu tc->setIntReg(SyscallPseudoReturnReg, process->ppid()); 6973114Sgblack@eecs.umich.edu return process->pid(); 6982238SN/A} 6992238SN/A 7002238SN/A 7012238SN/ASyscallReturn 7023114Sgblack@eecs.umich.edugetuidPseudoFunc(SyscallDesc *desc, int callnum, LiveProcess *process, 7032680Sktlim@umich.edu ThreadContext *tc) 7042238SN/A{ 7052238SN/A // Make up a UID and EUID... it shouldn't matter, and we want the 7062238SN/A // simulation to be deterministic. 7072238SN/A 7082238SN/A // EUID goes in r20. 7093114Sgblack@eecs.umich.edu tc->setIntReg(SyscallPseudoReturnReg, process->euid()); //EUID 7105543Ssaidi@eecs.umich.edu return process->uid(); // UID 7112238SN/A} 7122238SN/A 7132238SN/A 7142238SN/ASyscallReturn 7153114Sgblack@eecs.umich.edugetgidPseudoFunc(SyscallDesc *desc, int callnum, LiveProcess *process, 7162680Sktlim@umich.edu ThreadContext *tc) 7172238SN/A{ 7182238SN/A // Get current group ID. EGID goes in r20. 7193114Sgblack@eecs.umich.edu tc->setIntReg(SyscallPseudoReturnReg, process->egid()); //EGID 7203114Sgblack@eecs.umich.edu return process->gid(); 7212238SN/A} 7222238SN/A 7232238SN/A 7242238SN/ASyscallReturn 7253114Sgblack@eecs.umich.edusetuidFunc(SyscallDesc *desc, int callnum, LiveProcess *process, 7262680Sktlim@umich.edu ThreadContext *tc) 7272238SN/A{ 7282238SN/A // can't fathom why a benchmark would call this. 7296701Sgblack@eecs.umich.edu int index = 0; 7306701Sgblack@eecs.umich.edu warn("Ignoring call to setuid(%d)\n", process->getSyscallArg(tc, index)); 7312238SN/A return 0; 7322238SN/A} 7332238SN/A 7342238SN/ASyscallReturn 7353114Sgblack@eecs.umich.edugetpidFunc(SyscallDesc *desc, int callnum, LiveProcess *process, 7362680Sktlim@umich.edu ThreadContext *tc) 7372238SN/A{ 7382238SN/A // Make up a PID. There's no interprocess communication in 7392238SN/A // fake_syscall mode, so there's no way for a process to know it's 7402238SN/A // not getting a unique value. 7412238SN/A 7423114Sgblack@eecs.umich.edu tc->setIntReg(SyscallPseudoReturnReg, process->ppid()); //PID 7433114Sgblack@eecs.umich.edu return process->pid(); 7442238SN/A} 7452238SN/A 7462238SN/ASyscallReturn 7473114Sgblack@eecs.umich.edugetppidFunc(SyscallDesc *desc, int callnum, LiveProcess *process, 7482680Sktlim@umich.edu ThreadContext *tc) 7492238SN/A{ 7503114Sgblack@eecs.umich.edu return process->ppid(); 7512238SN/A} 7522238SN/A 7532238SN/ASyscallReturn 7543114Sgblack@eecs.umich.edugetuidFunc(SyscallDesc *desc, int callnum, LiveProcess *process, 7552680Sktlim@umich.edu ThreadContext *tc) 7562238SN/A{ 7575543Ssaidi@eecs.umich.edu return process->uid(); // UID 7582238SN/A} 7592238SN/A 7602238SN/ASyscallReturn 7613114Sgblack@eecs.umich.edugeteuidFunc(SyscallDesc *desc, int callnum, LiveProcess *process, 7622680Sktlim@umich.edu ThreadContext *tc) 7632238SN/A{ 7645543Ssaidi@eecs.umich.edu return process->euid(); // UID 7652238SN/A} 7662238SN/A 7672238SN/ASyscallReturn 7683114Sgblack@eecs.umich.edugetgidFunc(SyscallDesc *desc, int callnum, LiveProcess *process, 7692680Sktlim@umich.edu ThreadContext *tc) 7702238SN/A{ 7713114Sgblack@eecs.umich.edu return process->gid(); 7722238SN/A} 7732238SN/A 7742238SN/ASyscallReturn 7753114Sgblack@eecs.umich.edugetegidFunc(SyscallDesc *desc, int callnum, LiveProcess *process, 7762680Sktlim@umich.edu ThreadContext *tc) 7772238SN/A{ 7783114Sgblack@eecs.umich.edu return process->egid(); 7792238SN/A} 7802238SN/A 7812238SN/A 7826109Ssanchezd@stanford.eduSyscallReturn 7836109Ssanchezd@stanford.educloneFunc(SyscallDesc *desc, int callnum, LiveProcess *process, 7846109Ssanchezd@stanford.edu ThreadContext *tc) 7856109Ssanchezd@stanford.edu{ 7866701Sgblack@eecs.umich.edu int index = 0; 7876701Sgblack@eecs.umich.edu IntReg flags = process->getSyscallArg(tc, index); 7886701Sgblack@eecs.umich.edu IntReg newStack = process->getSyscallArg(tc, index); 7896701Sgblack@eecs.umich.edu 7906109Ssanchezd@stanford.edu DPRINTF(SyscallVerbose, "In sys_clone:\n"); 7916701Sgblack@eecs.umich.edu DPRINTF(SyscallVerbose, " Flags=%llx\n", flags); 7926701Sgblack@eecs.umich.edu DPRINTF(SyscallVerbose, " Child stack=%llx\n", newStack); 7936109Ssanchezd@stanford.edu 7946109Ssanchezd@stanford.edu 7956701Sgblack@eecs.umich.edu if (flags != 0x10f00) { 7966111Ssteve.reinhardt@amd.com warn("This sys_clone implementation assumes flags " 7976111Ssteve.reinhardt@amd.com "CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD " 7986111Ssteve.reinhardt@amd.com "(0x10f00), and may not work correctly with given flags " 7996701Sgblack@eecs.umich.edu "0x%llx\n", flags); 8006109Ssanchezd@stanford.edu } 8016109Ssanchezd@stanford.edu 8026111Ssteve.reinhardt@amd.com ThreadContext* ctc; // child thread context 8036109Ssanchezd@stanford.edu if ( ( ctc = process->findFreeContext() ) != NULL ) { 8046109Ssanchezd@stanford.edu DPRINTF(SyscallVerbose, " Found unallocated thread context\n"); 8056109Ssanchezd@stanford.edu 8066109Ssanchezd@stanford.edu ctc->clearArchRegs(); 8076109Ssanchezd@stanford.edu 8086111Ssteve.reinhardt@amd.com // Arch-specific cloning code 8096109Ssanchezd@stanford.edu #if THE_ISA == ALPHA_ISA or THE_ISA == X86_ISA 8106111Ssteve.reinhardt@amd.com // Cloning the misc. regs for these archs is enough 8116109Ssanchezd@stanford.edu TheISA::copyMiscRegs(tc, ctc); 8126109Ssanchezd@stanford.edu #elif THE_ISA == SPARC_ISA 8136109Ssanchezd@stanford.edu TheISA::copyRegs(tc, ctc); 8146109Ssanchezd@stanford.edu 8156111Ssteve.reinhardt@amd.com // TODO: Explain what this code actually does :-) 8166109Ssanchezd@stanford.edu ctc->setIntReg(NumIntArchRegs + 6, 0); 8176109Ssanchezd@stanford.edu ctc->setIntReg(NumIntArchRegs + 4, 0); 8186109Ssanchezd@stanford.edu ctc->setIntReg(NumIntArchRegs + 3, NWindows - 2); 8196109Ssanchezd@stanford.edu ctc->setIntReg(NumIntArchRegs + 5, NWindows); 8206337Sgblack@eecs.umich.edu ctc->setMiscReg(MISCREG_CWP, 0); 8216109Ssanchezd@stanford.edu ctc->setIntReg(NumIntArchRegs + 7, 0); 8226109Ssanchezd@stanford.edu ctc->setMiscRegNoEffect(MISCREG_TL, 0); 8239375Sgblack@eecs.umich.edu ctc->setMiscReg(MISCREG_ASI, ASI_PRIMARY); 8246109Ssanchezd@stanford.edu 8256109Ssanchezd@stanford.edu for (int y = 8; y < 32; y++) 8266109Ssanchezd@stanford.edu ctc->setIntReg(y, tc->readIntReg(y)); 8278149SChris.Emmons@ARM.com #elif THE_ISA == ARM_ISA 8288149SChris.Emmons@ARM.com TheISA::copyRegs(tc, ctc); 8296109Ssanchezd@stanford.edu #else 8306109Ssanchezd@stanford.edu fatal("sys_clone is not implemented for this ISA\n"); 8316109Ssanchezd@stanford.edu #endif 8326109Ssanchezd@stanford.edu 8336111Ssteve.reinhardt@amd.com // Set up stack register 8346701Sgblack@eecs.umich.edu ctc->setIntReg(TheISA::StackPointerReg, newStack); 8356109Ssanchezd@stanford.edu 8366111Ssteve.reinhardt@amd.com // Set up syscall return values in parent and child 8376111Ssteve.reinhardt@amd.com ctc->setIntReg(ReturnValueReg, 0); // return value, child 8386109Ssanchezd@stanford.edu 8396111Ssteve.reinhardt@amd.com // Alpha needs SyscallSuccessReg=0 in child 8406109Ssanchezd@stanford.edu #if THE_ISA == ALPHA_ISA 8416110Ssteve.reinhardt@amd.com ctc->setIntReg(TheISA::SyscallSuccessReg, 0); 8426109Ssanchezd@stanford.edu #endif 8436109Ssanchezd@stanford.edu 8446111Ssteve.reinhardt@amd.com // In SPARC/Linux, clone returns 0 on pseudo-return register if 8456111Ssteve.reinhardt@amd.com // parent, non-zero if child 8466109Ssanchezd@stanford.edu #if THE_ISA == SPARC_ISA 8476109Ssanchezd@stanford.edu tc->setIntReg(TheISA::SyscallPseudoReturnReg, 0); 8486109Ssanchezd@stanford.edu ctc->setIntReg(TheISA::SyscallPseudoReturnReg, 1); 8496109Ssanchezd@stanford.edu #endif 8506109Ssanchezd@stanford.edu 8517720Sgblack@eecs.umich.edu ctc->pcState(tc->nextInstAddr()); 8526109Ssanchezd@stanford.edu 8536109Ssanchezd@stanford.edu ctc->activate(); 8546109Ssanchezd@stanford.edu 8556109Ssanchezd@stanford.edu // Should return nonzero child TID in parent's syscall return register, 8566109Ssanchezd@stanford.edu // but for our pthread library any non-zero value will work 8576109Ssanchezd@stanford.edu return 1; 8586109Ssanchezd@stanford.edu } else { 8596109Ssanchezd@stanford.edu fatal("Called sys_clone, but no unallocated thread contexts found!\n"); 8606109Ssanchezd@stanford.edu return 0; 8616109Ssanchezd@stanford.edu } 8626109Ssanchezd@stanford.edu} 8636109Ssanchezd@stanford.edu 8649455Smitch.hayenga+gem5@gmail.comSyscallReturn 86510203SAli.Saidi@ARM.comaccessFunc(SyscallDesc *desc, int callnum, LiveProcess *p, ThreadContext *tc, 86610203SAli.Saidi@ARM.com int index) 8679455Smitch.hayenga+gem5@gmail.com{ 8689455Smitch.hayenga+gem5@gmail.com string path; 8699455Smitch.hayenga+gem5@gmail.com if (!tc->getMemProxy().tryReadString(path, p->getSyscallArg(tc, index))) 87010223Ssteve.reinhardt@amd.com return -EFAULT; 8719455Smitch.hayenga+gem5@gmail.com 8729455Smitch.hayenga+gem5@gmail.com // Adjust path for current working directory 8739455Smitch.hayenga+gem5@gmail.com path = p->fullPath(path); 8749455Smitch.hayenga+gem5@gmail.com 8759455Smitch.hayenga+gem5@gmail.com mode_t mode = p->getSyscallArg(tc, index); 8769455Smitch.hayenga+gem5@gmail.com 8779455Smitch.hayenga+gem5@gmail.com int result = access(path.c_str(), mode); 8789455Smitch.hayenga+gem5@gmail.com return (result == -1) ? -errno : result; 8799455Smitch.hayenga+gem5@gmail.com} 88010203SAli.Saidi@ARM.com 88110203SAli.Saidi@ARM.comSyscallReturn 88210203SAli.Saidi@ARM.comaccessFunc(SyscallDesc *desc, int callnum, LiveProcess *p, ThreadContext *tc) 88310203SAli.Saidi@ARM.com{ 88410203SAli.Saidi@ARM.com return accessFunc(desc, callnum, p, tc, 0); 88510203SAli.Saidi@ARM.com} 88610203SAli.Saidi@ARM.com 887