syscall_emul.cc revision 5543
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 35360SN/A#include <string> 36360SN/A#include <iostream> 37360SN/A 38360SN/A#include "sim/syscall_emul.hh" 392474SN/A#include "base/chunk_generator.hh" 40360SN/A#include "base/trace.hh" 412680Sktlim@umich.edu#include "cpu/thread_context.hh" 421717SN/A#include "cpu/base.hh" 432474SN/A#include "mem/page_table.hh" 44360SN/A#include "sim/process.hh" 45360SN/A 462667Sstever@eecs.umich.edu#include "sim/sim_exit.hh" 47360SN/A 48360SN/Ausing namespace std; 492107SN/Ausing namespace TheISA; 50360SN/A 51360SN/Avoid 523114Sgblack@eecs.umich.eduSyscallDesc::doSyscall(int callnum, LiveProcess *process, ThreadContext *tc) 53360SN/A{ 542495SN/A DPRINTFR(SyscallVerbose, "%d: %s: syscall %s called w/arguments %d,%d,%d,%d\n", 552680Sktlim@umich.edu curTick,tc->getCpuPtr()->name(), name, 562680Sktlim@umich.edu tc->getSyscallArg(0),tc->getSyscallArg(1), 572680Sktlim@umich.edu tc->getSyscallArg(2),tc->getSyscallArg(3)); 58360SN/A 592680Sktlim@umich.edu SyscallReturn retval = (*funcPtr)(this, callnum, process, tc); 60360SN/A 612495SN/A DPRINTFR(SyscallVerbose, "%d: %s: syscall %s returns %d\n", 622680Sktlim@umich.edu curTick,tc->getCpuPtr()->name(), name, retval.value()); 63360SN/A 641450SN/A if (!(flags & SyscallDesc::SuppressReturnValue)) 652680Sktlim@umich.edu tc->setSyscallReturn(retval); 66360SN/A} 67360SN/A 68360SN/A 691450SN/ASyscallReturn 703114Sgblack@eecs.umich.eduunimplementedFunc(SyscallDesc *desc, int callnum, LiveProcess *process, 712680Sktlim@umich.edu ThreadContext *tc) 72360SN/A{ 731969SN/A fatal("syscall %s (#%d) unimplemented.", desc->name, callnum); 742484SN/A 752484SN/A return 1; 76360SN/A} 77360SN/A 78360SN/A 791450SN/ASyscallReturn 803114Sgblack@eecs.umich.eduignoreFunc(SyscallDesc *desc, int callnum, LiveProcess *process, 812680Sktlim@umich.edu ThreadContext *tc) 82360SN/A{ 831969SN/A warn("ignoring syscall %s(%d, %d, ...)", desc->name, 842680Sktlim@umich.edu tc->getSyscallArg(0), tc->getSyscallArg(1)); 85360SN/A 861458SN/A return 0; 87360SN/A} 88360SN/A 89360SN/A 901450SN/ASyscallReturn 913114Sgblack@eecs.umich.eduexitFunc(SyscallDesc *desc, int callnum, LiveProcess *process, 922680Sktlim@umich.edu ThreadContext *tc) 93360SN/A{ 942834Sksewell@umich.edu if (tc->exit()) { 952834Sksewell@umich.edu exitSimLoop("target called exit()", tc->getSyscallArg(0) & 0xff); 962834Sksewell@umich.edu } 97360SN/A 981458SN/A return 1; 99360SN/A} 100360SN/A 101360SN/A 1021450SN/ASyscallReturn 1033114Sgblack@eecs.umich.edugetpagesizeFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc) 104360SN/A{ 1052107SN/A return (int)VMPageSize; 106360SN/A} 107360SN/A 108360SN/A 1091450SN/ASyscallReturn 1103114Sgblack@eecs.umich.eduobreakFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc) 111360SN/A{ 1122474SN/A Addr junk; 1132474SN/A 114360SN/A // change brk addr to first arg 1152680Sktlim@umich.edu Addr new_brk = tc->getSyscallArg(0); 1162474SN/A if (new_brk != 0) { 1172474SN/A for (ChunkGenerator gen(p->brk_point, new_brk - p->brk_point, 1182474SN/A VMPageSize); !gen.done(); gen.next()) { 1192474SN/A if (!p->pTable->translate(gen.addr(), junk)) 1202474SN/A p->pTable->allocate(roundDown(gen.addr(), VMPageSize), 1212474SN/A VMPageSize); 1222474SN/A } 1232474SN/A p->brk_point = new_brk; 1241450SN/A } 1251458SN/A DPRINTF(SyscallVerbose, "Break Point changed to: %#X\n", p->brk_point); 1261458SN/A return p->brk_point; 127360SN/A} 128360SN/A 129360SN/A 1301450SN/ASyscallReturn 1313114Sgblack@eecs.umich.educloseFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc) 132360SN/A{ 1332680Sktlim@umich.edu int target_fd = tc->getSyscallArg(0); 1341970SN/A int status = close(p->sim_fd(target_fd)); 1351970SN/A if (status >= 0) 1361970SN/A p->free_fd(target_fd); 1371970SN/A return status; 138360SN/A} 139360SN/A 140360SN/A 1411450SN/ASyscallReturn 1423114Sgblack@eecs.umich.edureadFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc) 143360SN/A{ 1442680Sktlim@umich.edu int fd = p->sim_fd(tc->getSyscallArg(0)); 1452680Sktlim@umich.edu int nbytes = tc->getSyscallArg(2); 1462680Sktlim@umich.edu BufferArg bufArg(tc->getSyscallArg(1), nbytes); 147360SN/A 148360SN/A int bytes_read = read(fd, bufArg.bufferPtr(), nbytes); 149360SN/A 150360SN/A if (bytes_read != -1) 1512680Sktlim@umich.edu bufArg.copyOut(tc->getMemPort()); 152360SN/A 1531458SN/A return bytes_read; 154360SN/A} 155360SN/A 1561450SN/ASyscallReturn 1573114Sgblack@eecs.umich.eduwriteFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc) 158360SN/A{ 1592680Sktlim@umich.edu int fd = p->sim_fd(tc->getSyscallArg(0)); 1602680Sktlim@umich.edu int nbytes = tc->getSyscallArg(2); 1612680Sktlim@umich.edu BufferArg bufArg(tc->getSyscallArg(1), nbytes); 162360SN/A 1632680Sktlim@umich.edu bufArg.copyIn(tc->getMemPort()); 164360SN/A 165360SN/A int bytes_written = write(fd, bufArg.bufferPtr(), nbytes); 166360SN/A 167360SN/A fsync(fd); 168360SN/A 1691458SN/A return bytes_written; 170360SN/A} 171360SN/A 172360SN/A 1731450SN/ASyscallReturn 1743114Sgblack@eecs.umich.edulseekFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc) 175360SN/A{ 1762680Sktlim@umich.edu int fd = p->sim_fd(tc->getSyscallArg(0)); 1772680Sktlim@umich.edu uint64_t offs = tc->getSyscallArg(1); 1782680Sktlim@umich.edu int whence = tc->getSyscallArg(2); 179360SN/A 180360SN/A off_t result = lseek(fd, offs, whence); 181360SN/A 1821458SN/A return (result == (off_t)-1) ? -errno : result; 183360SN/A} 184360SN/A 185360SN/A 1861450SN/ASyscallReturn 1874118Sgblack@eecs.umich.edu_llseekFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc) 1884118Sgblack@eecs.umich.edu{ 1894118Sgblack@eecs.umich.edu int fd = p->sim_fd(tc->getSyscallArg(0)); 1904118Sgblack@eecs.umich.edu uint64_t offset_high = tc->getSyscallArg(1); 1914118Sgblack@eecs.umich.edu uint32_t offset_low = tc->getSyscallArg(2); 1924118Sgblack@eecs.umich.edu Addr result_ptr = tc->getSyscallArg(3); 1934118Sgblack@eecs.umich.edu int whence = tc->getSyscallArg(4); 1944118Sgblack@eecs.umich.edu 1954118Sgblack@eecs.umich.edu uint64_t offset = (offset_high << 32) | offset_low; 1964118Sgblack@eecs.umich.edu 1974118Sgblack@eecs.umich.edu uint64_t result = lseek(fd, offset, whence); 1984118Sgblack@eecs.umich.edu result = TheISA::htog(result); 1994118Sgblack@eecs.umich.edu 2004118Sgblack@eecs.umich.edu if (result == (off_t)-1) { 2014118Sgblack@eecs.umich.edu //The seek failed. 2024118Sgblack@eecs.umich.edu return -errno; 2034118Sgblack@eecs.umich.edu } else { 2044118Sgblack@eecs.umich.edu //The seek succeeded. 2054118Sgblack@eecs.umich.edu //Copy "result" to "result_ptr" 2064118Sgblack@eecs.umich.edu //XXX We'll assume that the size of loff_t is 64 bits on the 2074118Sgblack@eecs.umich.edu //target platform 2084118Sgblack@eecs.umich.edu BufferArg result_buf(result_ptr, sizeof(result)); 2094118Sgblack@eecs.umich.edu memcpy(result_buf.bufferPtr(), &result, sizeof(result)); 2104118Sgblack@eecs.umich.edu result_buf.copyOut(tc->getMemPort()); 2114118Sgblack@eecs.umich.edu return 0; 2124118Sgblack@eecs.umich.edu } 2134118Sgblack@eecs.umich.edu 2144118Sgblack@eecs.umich.edu 2154118Sgblack@eecs.umich.edu return (result == (off_t)-1) ? -errno : result; 2164118Sgblack@eecs.umich.edu} 2174118Sgblack@eecs.umich.edu 2184118Sgblack@eecs.umich.edu 2194118Sgblack@eecs.umich.eduSyscallReturn 2203114Sgblack@eecs.umich.edumunmapFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc) 221360SN/A{ 222360SN/A // given that we don't really implement mmap, munmap is really easy 2231458SN/A return 0; 224360SN/A} 225360SN/A 226360SN/A 227360SN/Aconst char *hostname = "m5.eecs.umich.edu"; 228360SN/A 2291450SN/ASyscallReturn 2303114Sgblack@eecs.umich.edugethostnameFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc) 231360SN/A{ 2322680Sktlim@umich.edu int name_len = tc->getSyscallArg(1); 2332680Sktlim@umich.edu BufferArg name(tc->getSyscallArg(0), name_len); 234360SN/A 235360SN/A strncpy((char *)name.bufferPtr(), hostname, name_len); 236360SN/A 2372680Sktlim@umich.edu name.copyOut(tc->getMemPort()); 238360SN/A 2391458SN/A return 0; 240360SN/A} 241360SN/A 2421450SN/ASyscallReturn 2435513SMichael.Adler@intel.comgetcwdFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc) 2445513SMichael.Adler@intel.com{ 2455513SMichael.Adler@intel.com int result = 0; 2465513SMichael.Adler@intel.com unsigned long size = tc->getSyscallArg(1); 2475513SMichael.Adler@intel.com BufferArg buf(tc->getSyscallArg(0), size); 2485513SMichael.Adler@intel.com 2495513SMichael.Adler@intel.com // Is current working directory defined? 2505513SMichael.Adler@intel.com string cwd = p->getcwd(); 2515513SMichael.Adler@intel.com if (!cwd.empty()) { 2525513SMichael.Adler@intel.com if (cwd.length() >= size) { 2535513SMichael.Adler@intel.com // Buffer too small 2545513SMichael.Adler@intel.com return -ERANGE; 2555513SMichael.Adler@intel.com } 2565513SMichael.Adler@intel.com strncpy((char *)buf.bufferPtr(), cwd.c_str(), size); 2575513SMichael.Adler@intel.com result = cwd.length(); 2585513SMichael.Adler@intel.com } 2595513SMichael.Adler@intel.com else { 2605513SMichael.Adler@intel.com if (getcwd((char *)buf.bufferPtr(), size) != NULL) { 2615513SMichael.Adler@intel.com result = strlen((char *)buf.bufferPtr()); 2625513SMichael.Adler@intel.com } 2635513SMichael.Adler@intel.com else { 2645513SMichael.Adler@intel.com result = -1; 2655513SMichael.Adler@intel.com } 2665513SMichael.Adler@intel.com } 2675513SMichael.Adler@intel.com 2685513SMichael.Adler@intel.com buf.copyOut(tc->getMemPort()); 2695513SMichael.Adler@intel.com 2705513SMichael.Adler@intel.com return (result == -1) ? -errno : result; 2715513SMichael.Adler@intel.com} 2725513SMichael.Adler@intel.com 2735513SMichael.Adler@intel.com 2745513SMichael.Adler@intel.comSyscallReturn 2755513SMichael.Adler@intel.comreadlinkFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc) 2765513SMichael.Adler@intel.com{ 2775513SMichael.Adler@intel.com string path; 2785513SMichael.Adler@intel.com 2795513SMichael.Adler@intel.com if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0))) 2805513SMichael.Adler@intel.com return (TheISA::IntReg)-EFAULT; 2815513SMichael.Adler@intel.com 2825513SMichael.Adler@intel.com // Adjust path for current working directory 2835513SMichael.Adler@intel.com path = p->fullPath(path); 2845513SMichael.Adler@intel.com 2855513SMichael.Adler@intel.com size_t bufsiz = tc->getSyscallArg(2); 2865513SMichael.Adler@intel.com BufferArg buf(tc->getSyscallArg(1), bufsiz); 2875513SMichael.Adler@intel.com 2885513SMichael.Adler@intel.com int result = readlink(path.c_str(), (char *)buf.bufferPtr(), bufsiz); 2895513SMichael.Adler@intel.com 2905513SMichael.Adler@intel.com buf.copyOut(tc->getMemPort()); 2915513SMichael.Adler@intel.com 2925513SMichael.Adler@intel.com return (result == -1) ? -errno : result; 2935513SMichael.Adler@intel.com} 2945513SMichael.Adler@intel.com 2955513SMichael.Adler@intel.comSyscallReturn 2963114Sgblack@eecs.umich.eduunlinkFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc) 297511SN/A{ 2981706SN/A string path; 299360SN/A 3002680Sktlim@umich.edu if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0))) 3011450SN/A return (TheISA::IntReg)-EFAULT; 302511SN/A 3033669Sbinkertn@umich.edu // Adjust path for current working directory 3043669Sbinkertn@umich.edu path = p->fullPath(path); 3053669Sbinkertn@umich.edu 306511SN/A int result = unlink(path.c_str()); 3071458SN/A return (result == -1) ? -errno : result; 308511SN/A} 309511SN/A 3105513SMichael.Adler@intel.com 3115513SMichael.Adler@intel.comSyscallReturn 3125513SMichael.Adler@intel.commkdirFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc) 3135513SMichael.Adler@intel.com{ 3145513SMichael.Adler@intel.com string path; 3155513SMichael.Adler@intel.com 3165513SMichael.Adler@intel.com if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0))) 3175513SMichael.Adler@intel.com return (TheISA::IntReg)-EFAULT; 3185513SMichael.Adler@intel.com 3195513SMichael.Adler@intel.com // Adjust path for current working directory 3205513SMichael.Adler@intel.com path = p->fullPath(path); 3215513SMichael.Adler@intel.com 3225513SMichael.Adler@intel.com mode_t mode = tc->getSyscallArg(1); 3235513SMichael.Adler@intel.com 3245513SMichael.Adler@intel.com int result = mkdir(path.c_str(), mode); 3255513SMichael.Adler@intel.com return (result == -1) ? -errno : result; 3265513SMichael.Adler@intel.com} 3275513SMichael.Adler@intel.com 3281450SN/ASyscallReturn 3293114Sgblack@eecs.umich.edurenameFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc) 330511SN/A{ 3311706SN/A string old_name; 332511SN/A 3332680Sktlim@umich.edu if (!tc->getMemPort()->tryReadString(old_name, tc->getSyscallArg(0))) 3341458SN/A return -EFAULT; 335511SN/A 3361706SN/A string new_name; 337511SN/A 3382680Sktlim@umich.edu if (!tc->getMemPort()->tryReadString(new_name, tc->getSyscallArg(1))) 3391458SN/A return -EFAULT; 340511SN/A 3413669Sbinkertn@umich.edu // Adjust path for current working directory 3423669Sbinkertn@umich.edu old_name = p->fullPath(old_name); 3433669Sbinkertn@umich.edu new_name = p->fullPath(new_name); 3443669Sbinkertn@umich.edu 3451706SN/A int64_t result = rename(old_name.c_str(), new_name.c_str()); 3461458SN/A return (result == -1) ? -errno : result; 347511SN/A} 348511SN/A 3491706SN/ASyscallReturn 3503114Sgblack@eecs.umich.edutruncateFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc) 3511706SN/A{ 3521706SN/A string path; 3531706SN/A 3542680Sktlim@umich.edu if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0))) 3551706SN/A return -EFAULT; 3561706SN/A 3572680Sktlim@umich.edu off_t length = tc->getSyscallArg(1); 3581706SN/A 3593669Sbinkertn@umich.edu // Adjust path for current working directory 3603669Sbinkertn@umich.edu path = p->fullPath(path); 3613669Sbinkertn@umich.edu 3621706SN/A int result = truncate(path.c_str(), length); 3631706SN/A return (result == -1) ? -errno : result; 3641706SN/A} 3651706SN/A 3661706SN/ASyscallReturn 3673114Sgblack@eecs.umich.eduftruncateFunc(SyscallDesc *desc, int num, LiveProcess *process, ThreadContext *tc) 3681706SN/A{ 3692680Sktlim@umich.edu int fd = process->sim_fd(tc->getSyscallArg(0)); 3701706SN/A 3711706SN/A if (fd < 0) 3721706SN/A return -EBADF; 3731706SN/A 3742680Sktlim@umich.edu off_t length = tc->getSyscallArg(1); 3751706SN/A 3761706SN/A int result = ftruncate(fd, length); 3771706SN/A return (result == -1) ? -errno : result; 3781706SN/A} 3791999SN/A 3801999SN/ASyscallReturn 3815513SMichael.Adler@intel.comumaskFunc(SyscallDesc *desc, int num, LiveProcess *process, ThreadContext *tc) 3825513SMichael.Adler@intel.com{ 3835513SMichael.Adler@intel.com // Letting the simulated program change the simulator's umask seems like 3845513SMichael.Adler@intel.com // a bad idea. Compromise by just returning the current umask but not 3855513SMichael.Adler@intel.com // changing anything. 3865513SMichael.Adler@intel.com mode_t oldMask = umask(0); 3875513SMichael.Adler@intel.com umask(oldMask); 3885521Snate@binkert.org return (int)oldMask; 3895513SMichael.Adler@intel.com} 3905513SMichael.Adler@intel.com 3915513SMichael.Adler@intel.comSyscallReturn 3923114Sgblack@eecs.umich.educhownFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc) 3931999SN/A{ 3941999SN/A string path; 3951999SN/A 3962680Sktlim@umich.edu if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0))) 3971999SN/A return -EFAULT; 3981999SN/A 3991999SN/A /* XXX endianess */ 4002680Sktlim@umich.edu uint32_t owner = tc->getSyscallArg(1); 4011999SN/A uid_t hostOwner = owner; 4022680Sktlim@umich.edu uint32_t group = tc->getSyscallArg(2); 4031999SN/A gid_t hostGroup = group; 4041999SN/A 4053669Sbinkertn@umich.edu // Adjust path for current working directory 4063669Sbinkertn@umich.edu path = p->fullPath(path); 4073669Sbinkertn@umich.edu 4081999SN/A int result = chown(path.c_str(), hostOwner, hostGroup); 4091999SN/A return (result == -1) ? -errno : result; 4101999SN/A} 4111999SN/A 4121999SN/ASyscallReturn 4133114Sgblack@eecs.umich.edufchownFunc(SyscallDesc *desc, int num, LiveProcess *process, ThreadContext *tc) 4141999SN/A{ 4152680Sktlim@umich.edu int fd = process->sim_fd(tc->getSyscallArg(0)); 4161999SN/A 4171999SN/A if (fd < 0) 4181999SN/A return -EBADF; 4191999SN/A 4201999SN/A /* XXX endianess */ 4212680Sktlim@umich.edu uint32_t owner = tc->getSyscallArg(1); 4221999SN/A uid_t hostOwner = owner; 4232680Sktlim@umich.edu uint32_t group = tc->getSyscallArg(2); 4241999SN/A gid_t hostGroup = group; 4251999SN/A 4261999SN/A int result = fchown(fd, hostOwner, hostGroup); 4271999SN/A return (result == -1) ? -errno : result; 4281999SN/A} 4292093SN/A 4302093SN/A 4312093SN/ASyscallReturn 4323114Sgblack@eecs.umich.edudupFunc(SyscallDesc *desc, int num, LiveProcess *process, ThreadContext *tc) 4333079Sstever@eecs.umich.edu{ 4343079Sstever@eecs.umich.edu int fd = process->sim_fd(tc->getSyscallArg(0)); 4353079Sstever@eecs.umich.edu if (fd < 0) 4363079Sstever@eecs.umich.edu return -EBADF; 4373079Sstever@eecs.umich.edu 4385282Srstrong@cs.ucsd.edu Process::FdMap *fdo = process->sim_fd_obj(tc->getSyscallArg(0)); 4395282Srstrong@cs.ucsd.edu 4403079Sstever@eecs.umich.edu int result = dup(fd); 4415282Srstrong@cs.ucsd.edu return (result == -1) ? -errno : process->alloc_fd(result, fdo->filename, fdo->flags, fdo->mode, false); 4423079Sstever@eecs.umich.edu} 4433079Sstever@eecs.umich.edu 4443079Sstever@eecs.umich.edu 4453079Sstever@eecs.umich.eduSyscallReturn 4463114Sgblack@eecs.umich.edufcntlFunc(SyscallDesc *desc, int num, LiveProcess *process, 4472680Sktlim@umich.edu ThreadContext *tc) 4482093SN/A{ 4492680Sktlim@umich.edu int fd = tc->getSyscallArg(0); 4502093SN/A 4512093SN/A if (fd < 0 || process->sim_fd(fd) < 0) 4522093SN/A return -EBADF; 4532093SN/A 4542680Sktlim@umich.edu int cmd = tc->getSyscallArg(1); 4552093SN/A switch (cmd) { 4562093SN/A case 0: // F_DUPFD 4572093SN/A // if we really wanted to support this, we'd need to do it 4582093SN/A // in the target fd space. 4592093SN/A warn("fcntl(%d, F_DUPFD) not supported, error returned\n", fd); 4602093SN/A return -EMFILE; 4612093SN/A 4622093SN/A case 1: // F_GETFD (get close-on-exec flag) 4632093SN/A case 2: // F_SETFD (set close-on-exec flag) 4642093SN/A return 0; 4652093SN/A 4662093SN/A case 3: // F_GETFL (get file flags) 4672093SN/A case 4: // F_SETFL (set file flags) 4682093SN/A // not sure if this is totally valid, but we'll pass it through 4692093SN/A // to the underlying OS 4702093SN/A warn("fcntl(%d, %d) passed through to host\n", fd, cmd); 4712093SN/A return fcntl(process->sim_fd(fd), cmd); 4722093SN/A // return 0; 4732093SN/A 4742093SN/A case 7: // F_GETLK (get lock) 4752093SN/A case 8: // F_SETLK (set lock) 4762093SN/A case 9: // F_SETLKW (set lock and wait) 4772093SN/A // don't mess with file locking... just act like it's OK 4782093SN/A warn("File lock call (fcntl(%d, %d)) ignored.\n", fd, cmd); 4792093SN/A return 0; 4802093SN/A 4812093SN/A default: 4822093SN/A warn("Unknown fcntl command %d\n", cmd); 4832093SN/A return 0; 4842093SN/A } 4852093SN/A} 4862093SN/A 4872238SN/ASyscallReturn 4883114Sgblack@eecs.umich.edufcntl64Func(SyscallDesc *desc, int num, LiveProcess *process, 4892687Sksewell@umich.edu ThreadContext *tc) 4902687Sksewell@umich.edu{ 4912687Sksewell@umich.edu int fd = tc->getSyscallArg(0); 4922687Sksewell@umich.edu 4932687Sksewell@umich.edu if (fd < 0 || process->sim_fd(fd) < 0) 4942687Sksewell@umich.edu return -EBADF; 4952687Sksewell@umich.edu 4962687Sksewell@umich.edu int cmd = tc->getSyscallArg(1); 4972687Sksewell@umich.edu switch (cmd) { 4982687Sksewell@umich.edu case 33: //F_GETLK64 4992687Sksewell@umich.edu warn("fcntl64(%d, F_GETLK64) not supported, error returned\n", fd); 5002687Sksewell@umich.edu return -EMFILE; 5012687Sksewell@umich.edu 5022687Sksewell@umich.edu case 34: // F_SETLK64 5032687Sksewell@umich.edu case 35: // F_SETLKW64 5042687Sksewell@umich.edu warn("fcntl64(%d, F_SETLK(W)64) not supported, error returned\n", fd); 5052687Sksewell@umich.edu return -EMFILE; 5062687Sksewell@umich.edu 5072687Sksewell@umich.edu default: 5082687Sksewell@umich.edu // not sure if this is totally valid, but we'll pass it through 5092687Sksewell@umich.edu // to the underlying OS 5102687Sksewell@umich.edu warn("fcntl64(%d, %d) passed through to host\n", fd, cmd); 5112687Sksewell@umich.edu return fcntl(process->sim_fd(fd), cmd); 5122687Sksewell@umich.edu // return 0; 5132687Sksewell@umich.edu } 5142687Sksewell@umich.edu} 5152687Sksewell@umich.edu 5162687Sksewell@umich.eduSyscallReturn 5173114Sgblack@eecs.umich.edupipePseudoFunc(SyscallDesc *desc, int callnum, LiveProcess *process, 5182680Sktlim@umich.edu ThreadContext *tc) 5192238SN/A{ 5202238SN/A int fds[2], sim_fds[2]; 5212238SN/A int pipe_retval = pipe(fds); 5222093SN/A 5232238SN/A if (pipe_retval < 0) { 5242238SN/A // error 5252238SN/A return pipe_retval; 5262238SN/A } 5272238SN/A 5285282Srstrong@cs.ucsd.edu sim_fds[0] = process->alloc_fd(fds[0], "PIPE-READ", O_WRONLY, -1, true); 5295282Srstrong@cs.ucsd.edu sim_fds[1] = process->alloc_fd(fds[1], "PIPE-WRITE", O_RDONLY, -1, true); 5302238SN/A 5315282Srstrong@cs.ucsd.edu process->setReadPipeSource(sim_fds[0], sim_fds[1]); 5322238SN/A // Alpha Linux convention for pipe() is that fd[0] is returned as 5332238SN/A // the return value of the function, and fd[1] is returned in r20. 5342680Sktlim@umich.edu tc->setIntReg(SyscallPseudoReturnReg, sim_fds[1]); 5352238SN/A return sim_fds[0]; 5362238SN/A} 5372238SN/A 5382238SN/A 5392238SN/ASyscallReturn 5403114Sgblack@eecs.umich.edugetpidPseudoFunc(SyscallDesc *desc, int callnum, LiveProcess *process, 5412680Sktlim@umich.edu ThreadContext *tc) 5422238SN/A{ 5432238SN/A // Make up a PID. There's no interprocess communication in 5442238SN/A // fake_syscall mode, so there's no way for a process to know it's 5452238SN/A // not getting a unique value. 5462238SN/A 5473114Sgblack@eecs.umich.edu tc->setIntReg(SyscallPseudoReturnReg, process->ppid()); 5483114Sgblack@eecs.umich.edu return process->pid(); 5492238SN/A} 5502238SN/A 5512238SN/A 5522238SN/ASyscallReturn 5533114Sgblack@eecs.umich.edugetuidPseudoFunc(SyscallDesc *desc, int callnum, LiveProcess *process, 5542680Sktlim@umich.edu ThreadContext *tc) 5552238SN/A{ 5562238SN/A // Make up a UID and EUID... it shouldn't matter, and we want the 5572238SN/A // simulation to be deterministic. 5582238SN/A 5592238SN/A // EUID goes in r20. 5603114Sgblack@eecs.umich.edu tc->setIntReg(SyscallPseudoReturnReg, process->euid()); //EUID 5615543Ssaidi@eecs.umich.edu return process->uid(); // UID 5622238SN/A} 5632238SN/A 5642238SN/A 5652238SN/ASyscallReturn 5663114Sgblack@eecs.umich.edugetgidPseudoFunc(SyscallDesc *desc, int callnum, LiveProcess *process, 5672680Sktlim@umich.edu ThreadContext *tc) 5682238SN/A{ 5692238SN/A // Get current group ID. EGID goes in r20. 5703114Sgblack@eecs.umich.edu tc->setIntReg(SyscallPseudoReturnReg, process->egid()); //EGID 5713114Sgblack@eecs.umich.edu return process->gid(); 5722238SN/A} 5732238SN/A 5742238SN/A 5752238SN/ASyscallReturn 5763114Sgblack@eecs.umich.edusetuidFunc(SyscallDesc *desc, int callnum, LiveProcess *process, 5772680Sktlim@umich.edu ThreadContext *tc) 5782238SN/A{ 5792238SN/A // can't fathom why a benchmark would call this. 5802680Sktlim@umich.edu warn("Ignoring call to setuid(%d)\n", tc->getSyscallArg(0)); 5812238SN/A return 0; 5822238SN/A} 5832238SN/A 5842238SN/ASyscallReturn 5853114Sgblack@eecs.umich.edugetpidFunc(SyscallDesc *desc, int callnum, LiveProcess *process, 5862680Sktlim@umich.edu ThreadContext *tc) 5872238SN/A{ 5882238SN/A // Make up a PID. There's no interprocess communication in 5892238SN/A // fake_syscall mode, so there's no way for a process to know it's 5902238SN/A // not getting a unique value. 5912238SN/A 5923114Sgblack@eecs.umich.edu tc->setIntReg(SyscallPseudoReturnReg, process->ppid()); //PID 5933114Sgblack@eecs.umich.edu return process->pid(); 5942238SN/A} 5952238SN/A 5962238SN/ASyscallReturn 5973114Sgblack@eecs.umich.edugetppidFunc(SyscallDesc *desc, int callnum, LiveProcess *process, 5982680Sktlim@umich.edu ThreadContext *tc) 5992238SN/A{ 6003114Sgblack@eecs.umich.edu return process->ppid(); 6012238SN/A} 6022238SN/A 6032238SN/ASyscallReturn 6043114Sgblack@eecs.umich.edugetuidFunc(SyscallDesc *desc, int callnum, LiveProcess *process, 6052680Sktlim@umich.edu ThreadContext *tc) 6062238SN/A{ 6075543Ssaidi@eecs.umich.edu return process->uid(); // UID 6082238SN/A} 6092238SN/A 6102238SN/ASyscallReturn 6113114Sgblack@eecs.umich.edugeteuidFunc(SyscallDesc *desc, int callnum, LiveProcess *process, 6122680Sktlim@umich.edu ThreadContext *tc) 6132238SN/A{ 6145543Ssaidi@eecs.umich.edu return process->euid(); // UID 6152238SN/A} 6162238SN/A 6172238SN/ASyscallReturn 6183114Sgblack@eecs.umich.edugetgidFunc(SyscallDesc *desc, int callnum, LiveProcess *process, 6192680Sktlim@umich.edu ThreadContext *tc) 6202238SN/A{ 6213114Sgblack@eecs.umich.edu return process->gid(); 6222238SN/A} 6232238SN/A 6242238SN/ASyscallReturn 6253114Sgblack@eecs.umich.edugetegidFunc(SyscallDesc *desc, int callnum, LiveProcess *process, 6262680Sktlim@umich.edu ThreadContext *tc) 6272238SN/A{ 6283114Sgblack@eecs.umich.edu return process->egid(); 6292238SN/A} 6302238SN/A 6312238SN/A 632