syscall_emul.hh revision 1354
1360SN/A/* 21458SN/A * Copyright (c) 2003-2004 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 292665Ssaidi@eecs.umich.edu#ifndef __SIM_SYSCALL_EMUL_HH__ 30360SN/A#define __SIM_SYSCALL_EMUL_HH__ 31360SN/A 321354SN/A/// 331354SN/A/// @file syscall_emul.hh 34360SN/A/// 352764Sstever@eecs.umich.edu/// This file defines objects used to emulate syscalls from the target 362764Sstever@eecs.umich.edu/// application on the host machine. 372064SN/A 38360SN/A#include <errno.h> 39360SN/A#include <string> 40360SN/A 41360SN/A#include "base/intmath.hh" // for RoundUp 42360SN/A#include "mem/functional_mem/functional_memory.hh" 43360SN/A#include "targetarch/isa_traits.hh" // for Addr 441809SN/A 455543Ssaidi@eecs.umich.edu#include "base/trace.hh" 461809SN/A#include "cpu/exec_context.hh" 473113Sgblack@eecs.umich.edu#include "sim/process.hh" 488229Snate@binkert.org 498229Snate@binkert.org/// 503113Sgblack@eecs.umich.edu/// System call descriptor. 517075Snate@binkert.org/// 528229Snate@binkert.orgclass SyscallDesc { 537075Snate@binkert.org 54360SN/A public: 552474SN/A 565543Ssaidi@eecs.umich.edu /// Typedef for target syscall handler functions. 572462SN/A typedef int (*FuncPtr)(SyscallDesc *, int num, 581354SN/A Process *, ExecContext *); 596216Snate@binkert.org 606658Snate@binkert.org const char *name; //!< Syscall name (e.g., "open"). 612474SN/A FuncPtr funcPtr; //!< Pointer to emulation function. 622680Sktlim@umich.edu int flags; //!< Flags (see Flags enum). 638232Snate@binkert.org 648229Snate@binkert.org /// Flag values for controlling syscall behavior. 652474SN/A enum Flags { 667678Sgblack@eecs.umich.edu /// Don't set return regs according to funcPtr return value. 678229Snate@binkert.org /// Used for syscalls with non-standard return conventions 686640Svince@csl.cornell.edu /// that explicitly set the ExecContext regs (e.g., 69360SN/A /// sigreturn). 70360SN/A SuppressReturnValue = 1 71360SN/A }; 72360SN/A 73360SN/A /// Constructor. 74360SN/A SyscallDesc(const char *_name, FuncPtr _funcPtr, int _flags = 0) 75360SN/A : name(_name), funcPtr(_funcPtr), flags(_flags) 76360SN/A { 77378SN/A } 781450SN/A 793114Sgblack@eecs.umich.edu /// Emulate the syscall. Public interface for calling through funcPtr. 80360SN/A void doSyscall(int callnum, Process *proc, ExecContext *xc); 815543Ssaidi@eecs.umich.edu}; 825543Ssaidi@eecs.umich.edu 835543Ssaidi@eecs.umich.edu 84360SN/Aclass BaseBufferArg { 85360SN/A 86360SN/A public: 87360SN/A 88360SN/A BaseBufferArg(Addr _addr, int _size) : addr(_addr), size(_size) 892680Sktlim@umich.edu { 90360SN/A bufPtr = new uint8_t[size]; 91360SN/A // clear out buffer: in case we only partially populate this, 92360SN/A // and then do a copyOut(), we want to make sure we don't 93360SN/A // introduce any random junk into the simulated address space 94360SN/A memset(bufPtr, 0, size); 95360SN/A } 96360SN/A 97360SN/A virtual ~BaseBufferArg() { delete [] bufPtr; } 98360SN/A 99360SN/A // 100360SN/A // copy data into simulator space (read from target memory) 1013114Sgblack@eecs.umich.edu // 102360SN/A virtual bool copyIn(FunctionalMemory *mem) 103360SN/A { 104360SN/A mem->access(Read, addr, bufPtr, size); 105360SN/A return true; // no EFAULT detection for now 106360SN/A } 107360SN/A 108360SN/A // 109360SN/A // copy data out of simulator space (write to target memory) 110360SN/A // 111360SN/A virtual bool copyOut(FunctionalMemory *mem) 112360SN/A { 113360SN/A mem->access(Write, addr, bufPtr, size); 114360SN/A return true; // no EFAULT detection for now 115360SN/A } 116360SN/A 117360SN/A protected: 118360SN/A Addr addr; 119360SN/A int size; 120360SN/A uint8_t *bufPtr; 121360SN/A}; 122360SN/A 1232400SN/A 124360SN/Aclass BufferArg : public BaseBufferArg 1252461SN/A{ 1265543Ssaidi@eecs.umich.edu public: 127360SN/A BufferArg(Addr _addr, int _size) : BaseBufferArg(_addr, _size) { } 128360SN/A void *bufferPtr() { return bufPtr; } 129360SN/A}; 130360SN/A 131360SN/Atemplate <class T> 1322400SN/Aclass TypedBufferArg : public BaseBufferArg 133360SN/A{ 1342461SN/A public: 1355543Ssaidi@eecs.umich.edu // user can optionally specify a specific number of bytes to 136360SN/A // allocate to deal with those structs that have variable-size 137360SN/A // arrays at the end 138360SN/A TypedBufferArg(Addr _addr, int _size = sizeof(T)) 139360SN/A : BaseBufferArg(_addr, _size) 140360SN/A { } 141360SN/A 142360SN/A // type case 143360SN/A operator T*() { return (T *)bufPtr; } 144360SN/A 145360SN/A // dereference operators 146360SN/A T &operator*() { return *((T *)bufPtr); } 147360SN/A T* operator->() { return (T *)bufPtr; } 148360SN/A T &operator[](int i) { return ((T *)bufPtr)[i]; } 1495543Ssaidi@eecs.umich.edu}; 150360SN/A 151360SN/A////////////////////////////////////////////////////////////////////// 152360SN/A// 153360SN/A// The following emulation functions are generic enough that they 154360SN/A// don't need to be recompiled for different emulated OS's. They are 155360SN/A// defined in sim/syscall_emul.cc. 156360SN/A// 157360SN/A////////////////////////////////////////////////////////////////////// 158360SN/A 159360SN/A 160360SN/A/// Handler for unimplemented syscalls that we haven't thought about. 161360SN/Aint unimplementedFunc(SyscallDesc *desc, int num, Process *p, ExecContext *xc); 162360SN/A 163360SN/A/// Handler for unimplemented syscalls that we never intend to 164360SN/A/// implement (signal handling, etc.) and should not affect the correct 165360SN/A/// behavior of the program. Print a warning only if the appropriate 166360SN/A/// trace flag is enabled. Return success to the target program. 1675543Ssaidi@eecs.umich.eduint ignoreFunc(SyscallDesc *desc, int num, Process *p, ExecContext *xc); 1685543Ssaidi@eecs.umich.edu 169502SN/A/// Target exit() handler: terminate simulation. 170360SN/Aint exitFunc(SyscallDesc *desc, int num, Process *p, ExecContext *xc); 171360SN/A 172360SN/A/// Target getpagesize() handler. 173360SN/Aint getpagesizeFunc(SyscallDesc *desc, int num, Process *p, ExecContext *xc); 174360SN/A 175360SN/A/// Target obreak() handler: set brk address. 176360SN/Aint obreakFunc(SyscallDesc *desc, int num, Process *p, ExecContext *xc); 177360SN/A 178360SN/A/// Target close() handler. 179360SN/Aint closeFunc(SyscallDesc *desc, int num, Process *p, ExecContext *xc); 180360SN/A 181378SN/A/// Target read() handler. 1821706SN/Aint readFunc(SyscallDesc *desc, int num, Process *p, ExecContext *xc); 1833114Sgblack@eecs.umich.edu 184378SN/A/// Target write() handler. 185378SN/Aint writeFunc(SyscallDesc *desc, int num, Process *p, ExecContext *xc); 186378SN/A 187378SN/A/// Target lseek() handler. 188378SN/Aint lseekFunc(SyscallDesc *desc, int num, Process *p, ExecContext *xc); 1891706SN/A 1903114Sgblack@eecs.umich.edu/// Target munmap() handler. 1918149SChris.Emmons@ARM.comint munmapFunc(SyscallDesc *desc, int num, Process *p, ExecContext *xc); 1928149SChris.Emmons@ARM.com 193360SN/A/// Target gethostname() handler. 1946109Ssanchezd@stanford.eduint gethostnameFunc(SyscallDesc *desc, int num, Process *p, ExecContext *xc); 1951706SN/A 1963114Sgblack@eecs.umich.edu/// Target unlink() handler. 197378SN/Aint unlinkFunc(SyscallDesc *desc, int num, Process *p, ExecContext *xc); 1986109Ssanchezd@stanford.edu 1996109Ssanchezd@stanford.edu/// Target rename() handler. 2006109Ssanchezd@stanford.eduint renameFunc(SyscallDesc *desc, int num, Process *p, ExecContext *xc); 2016109Ssanchezd@stanford.edu 202378SN/A/// This struct is used to build an target-OS-dependent table that 2031706SN/A/// maps the target's open() flags to the host open() flags. 2043114Sgblack@eecs.umich.edustruct OpenFlagTransTable { 205378SN/A int tgtFlag; //!< Target system flag value. 2065748SSteve.Reinhardt@amd.com int hostFlag; //!< Corresponding host system flag value. 2075748SSteve.Reinhardt@amd.com}; 2085748SSteve.Reinhardt@amd.com 209378SN/A 210378SN/A 2111706SN/A/// A readable name for 1,000,000, for converting microseconds to seconds. 2123114Sgblack@eecs.umich.educonst int one_million = 1000000; 213378SN/A 214378SN/A/// Approximate seconds since the epoch (1/1/1970). About a billion, 2151706SN/A/// by my reckoning. We want to keep this a constant (not use the 2163114Sgblack@eecs.umich.edu/// real-world time) to keep simulations repeatable. 217378SN/Aconst unsigned seconds_since_epoch = 1000000000; 218378SN/A 2191706SN/A/// Helper function to convert current elapsed time to seconds and 2203114Sgblack@eecs.umich.edu/// microseconds. 221378SN/Atemplate <class T1, class T2> 222378SN/Avoid 2231706SN/AgetElapsedTime(T1 &sec, T2 &usec) 2243114Sgblack@eecs.umich.edu{ 225378SN/A int cycles_per_usec = ticksPerSecond / one_million; 2264118Sgblack@eecs.umich.edu 2274118Sgblack@eecs.umich.edu int elapsed_usecs = curTick / cycles_per_usec; 2284118Sgblack@eecs.umich.edu sec = elapsed_usecs / one_million; 2294118Sgblack@eecs.umich.edu usec = elapsed_usecs % one_million; 230378SN/A} 2311706SN/A 2323114Sgblack@eecs.umich.edu////////////////////////////////////////////////////////////////////// 233378SN/A// 234378SN/A// The following emulation functions are generic, but need to be 2351706SN/A// templated to account for differences in types, constants, etc. 2363114Sgblack@eecs.umich.edu// 237360SN/A////////////////////////////////////////////////////////////////////// 2385513SMichael.Adler@intel.com 2395513SMichael.Adler@intel.com/// Target ioctl() handler. For the most part, programs call ioctl() 2405513SMichael.Adler@intel.com/// only to find out if their stdout is a tty, to determine whether to 2415513SMichael.Adler@intel.com/// do line or block buffering. 2425513SMichael.Adler@intel.comtemplate <class OS> 2435513SMichael.Adler@intel.comint 2445513SMichael.Adler@intel.comioctlFunc(SyscallDesc *desc, int callnum, Process *process, 2455513SMichael.Adler@intel.com ExecContext *xc) 246511SN/A{ 2471706SN/A int fd = xc->getSyscallArg(0); 2483114Sgblack@eecs.umich.edu unsigned req = xc->getSyscallArg(1); 249511SN/A 2505513SMichael.Adler@intel.com // DPRINTFR(SyscallVerbose, "ioctl(%d, 0x%x, ...)\n", fd, req); 2515513SMichael.Adler@intel.com 2525513SMichael.Adler@intel.com if (fd < 0 || process->sim_fd(fd) < 0) { 2535513SMichael.Adler@intel.com // doesn't map to any simulator fd: not a valid target fd 254511SN/A return -EBADF; 2551706SN/A } 2563114Sgblack@eecs.umich.edu 2571706SN/A switch (req) { 2581706SN/A case OS::TIOCISATTY: 2591706SN/A case OS::TIOCGETP: 2601706SN/A case OS::TIOCSETP: 2613114Sgblack@eecs.umich.edu case OS::TIOCSETN: 2621706SN/A case OS::TIOCSETC: 2631706SN/A case OS::TIOCGETC: 2641706SN/A case OS::TIOCGETS: 2651706SN/A case OS::TIOCGETA: 2663114Sgblack@eecs.umich.edu return -ENOTTY; 2671706SN/A 268511SN/A default: 2696703Svince@csl.cornell.edu fatal("Unsupported ioctl call: ioctl(%d, 0x%x, ...) @ 0x%llx\n", fd, req, xc->readPC()); 2706703Svince@csl.cornell.edu } 2716703Svince@csl.cornell.edu} 2726703Svince@csl.cornell.edu 2736685Stjones1@inf.ed.ac.uk/// Target open() handler. 2746685Stjones1@inf.ed.ac.uktemplate <class OS> 2756685Stjones1@inf.ed.ac.ukint 2766685Stjones1@inf.ed.ac.ukopenFunc(SyscallDesc *desc, int callnum, Process *process, 2776685Stjones1@inf.ed.ac.uk ExecContext *xc) 2785513SMichael.Adler@intel.com{ 2795513SMichael.Adler@intel.com std::string path; 2805513SMichael.Adler@intel.com 2815513SMichael.Adler@intel.com if (xc->mem->readString(path, xc->getSyscallArg(0)) != No_Fault) 2825513SMichael.Adler@intel.com return -EFAULT; 2831999SN/A 2841999SN/A if (path == "/dev/sysdev0") { 2853114Sgblack@eecs.umich.edu // This is a memory-mapped high-resolution timer device on Alpha. 2861999SN/A // We don't support it, so just punt. 2871999SN/A DCOUT(SyscallWarnings) << "Ignoring open(" << path << ", ...)" << std::endl; 2881999SN/A return -ENOENT; 2891999SN/A } 2903114Sgblack@eecs.umich.edu 2911999SN/A int tgtFlags = xc->getSyscallArg(1); 2923079Sstever@eecs.umich.edu int mode = xc->getSyscallArg(2); 2933079Sstever@eecs.umich.edu int hostFlags = 0; 2943114Sgblack@eecs.umich.edu 2953079Sstever@eecs.umich.edu // translate open flags 2962093SN/A for (int i = 0; i < OS::NUM_OPEN_FLAGS; i++) { 2972093SN/A if (tgtFlags & OS::openFlagTable[i].tgtFlag) { 2983114Sgblack@eecs.umich.edu tgtFlags &= ~OS::openFlagTable[i].tgtFlag; 2992093SN/A hostFlags |= OS::openFlagTable[i].hostFlag; 3002687Sksewell@umich.edu } 3012687Sksewell@umich.edu } 3023114Sgblack@eecs.umich.edu 3032687Sksewell@umich.edu // any target flags left? 3042238SN/A if (tgtFlags != 0) 3052238SN/A std::cerr << "Syscall: open: cannot decode flags: " << tgtFlags << std::endl; 3063114Sgblack@eecs.umich.edu 3072238SN/A#ifdef __CYGWIN32__ 3082238SN/A hostFlags |= O_BINARY; 3092238SN/A#endif 3103114Sgblack@eecs.umich.edu 3112238SN/A // open the file 3122238SN/A int fd = open(path.c_str(), hostFlags, mode); 3132238SN/A 3143114Sgblack@eecs.umich.edu return (fd == -1) ? -errno : process->open_fd(fd); 3152238SN/A} 3162238SN/A 3172238SN/A 3183114Sgblack@eecs.umich.edu/// Target stat() handler. 3192238SN/Atemplate <class OS> 3202238SN/Aint 3212238SN/AstatFunc(SyscallDesc *desc, int callnum, Process *process, 3223114Sgblack@eecs.umich.edu ExecContext *xc) 3232238SN/A{ 3242238SN/A std::string path; 3252238SN/A 3263114Sgblack@eecs.umich.edu if (xc->mem->readString(path, xc->getSyscallArg(0)) != No_Fault) 3272238SN/A return -EFAULT; 3282238SN/A 3292238SN/A struct stat hostBuf; 3303114Sgblack@eecs.umich.edu int result = stat(path.c_str(), &hostBuf); 3312238SN/A 3326109Ssanchezd@stanford.edu if (result < 0) 3336109Ssanchezd@stanford.edu return -errno; 3346109Ssanchezd@stanford.edu 3352238SN/A OS::copyOutStatBuf(xc->mem, xc->getSyscallArg(1), &hostBuf); 3362238SN/A 3372238SN/A return 0; 3382238SN/A} 3392238SN/A 3403114Sgblack@eecs.umich.edu 3412238SN/A/// Target lstat() handler. 3422238SN/Atemplate <class OS> 3432238SN/Aint 3443114Sgblack@eecs.umich.edulstatFunc(SyscallDesc *desc, int callnum, Process *process, 3452238SN/A ExecContext *xc) 3462238SN/A{ 3472238SN/A std::string path; 3483114Sgblack@eecs.umich.edu 3492238SN/A if (xc->mem->readString(path, xc->getSyscallArg(0)) != No_Fault) 3502238SN/A return -EFAULT; 3512238SN/A 3523114Sgblack@eecs.umich.edu struct stat hostBuf; 3532238SN/A int result = lstat(path.c_str(), &hostBuf); 3542238SN/A 3551354SN/A if (result < 0) 3561354SN/A return -errno; 3571354SN/A 3581354SN/A OS::copyOutStatBuf(xc->mem, xc->getSyscallArg(1), &hostBuf); 3591354SN/A 3601354SN/A return 0; 3611354SN/A} 3621354SN/A 3631354SN/A/// Target fstat() handler. 3641354SN/Atemplate <class OS> 3651354SN/Aint 3661354SN/AfstatFunc(SyscallDesc *desc, int callnum, Process *process, 3671354SN/A ExecContext *xc) 3681354SN/A{ 3697823Ssteve.reinhardt@amd.com int fd = process->sim_fd(xc->getSyscallArg(0)); 3701354SN/A 3711354SN/A // DPRINTFR(SyscallVerbose, "fstat(%d, ...)\n", fd); 3721354SN/A 3731354SN/A if (fd < 0) 374360SN/A return -EBADF; 375360SN/A 376360SN/A struct stat hostBuf; 377360SN/A int result = fstat(fd, &hostBuf); 378360SN/A 379360SN/A if (result < 0) 380360SN/A return -errno; 3813113Sgblack@eecs.umich.edu 3823113Sgblack@eecs.umich.edu OS::copyOutStatBuf(xc->mem, xc->getSyscallArg(1), &hostBuf); 3833113Sgblack@eecs.umich.edu 3843113Sgblack@eecs.umich.edu return 0; 3853113Sgblack@eecs.umich.edu} 3863113Sgblack@eecs.umich.edu 3873113Sgblack@eecs.umich.edu 3883113Sgblack@eecs.umich.edu/// Target mmap() handler. 3893113Sgblack@eecs.umich.edu/// 3903113Sgblack@eecs.umich.edu/// We don't really handle mmap(). If the target is mmaping an 3913113Sgblack@eecs.umich.edu/// anonymous region or /dev/zero, we can get away with doing basically 3923113Sgblack@eecs.umich.edu/// nothing (since memory is initialized to zero and the simulator 3933113Sgblack@eecs.umich.edu/// doesn't really check addresses anyway). Always print a warning, 3943113Sgblack@eecs.umich.edu/// since this could be seriously broken if we're not mapping 3953113Sgblack@eecs.umich.edu/// /dev/zero. 3963113Sgblack@eecs.umich.edu// 3974189Sgblack@eecs.umich.edu/// Someday we should explicitly check for /dev/zero in open, flag the 3984189Sgblack@eecs.umich.edu/// file descriptor, and fail (or implement!) a non-anonymous mmap to 3993113Sgblack@eecs.umich.edu/// anything else. 4003113Sgblack@eecs.umich.edutemplate <class OS> 4013113Sgblack@eecs.umich.eduint 4023113Sgblack@eecs.umich.edummapFunc(SyscallDesc *desc, int num, Process *p, ExecContext *xc) 4033113Sgblack@eecs.umich.edu{ 4043113Sgblack@eecs.umich.edu Addr start = xc->getSyscallArg(0); 4053113Sgblack@eecs.umich.edu uint64_t length = xc->getSyscallArg(1); 4063277Sgblack@eecs.umich.edu // int prot = xc->getSyscallArg(2); 4075515SMichael.Adler@intel.com int flags = xc->getSyscallArg(3); 4085515SMichael.Adler@intel.com // int fd = p->sim_fd(xc->getSyscallArg(4)); 4095515SMichael.Adler@intel.com // int offset = xc->getSyscallArg(5); 4105515SMichael.Adler@intel.com 4115515SMichael.Adler@intel.com if (start == 0) { 4123277Sgblack@eecs.umich.edu // user didn't give an address... pick one from our "mmap region" 4133277Sgblack@eecs.umich.edu start = p->mmap_base; 4143277Sgblack@eecs.umich.edu p->mmap_base += RoundUp<Addr>(length, VMPageSize); 4153277Sgblack@eecs.umich.edu } 4163277Sgblack@eecs.umich.edu 4173277Sgblack@eecs.umich.edu if (!(flags & OS::TGT_MAP_ANONYMOUS)) { 4183277Sgblack@eecs.umich.edu DPRINTF(SyscallWarnings, "Warning: allowing mmap of file @ fd %d. " 4193113Sgblack@eecs.umich.edu "This will break if not /dev/zero.", xc->getSyscallArg(4)); 4203113Sgblack@eecs.umich.edu } 4213113Sgblack@eecs.umich.edu 4223113Sgblack@eecs.umich.edu return start; 4233113Sgblack@eecs.umich.edu} 4243113Sgblack@eecs.umich.edu 4253113Sgblack@eecs.umich.edu/// Target getrlimit() handler. 4263114Sgblack@eecs.umich.edutemplate <class OS> 4273113Sgblack@eecs.umich.eduint 4283114Sgblack@eecs.umich.edugetrlimitFunc(SyscallDesc *desc, int callnum, Process *process, 4293113Sgblack@eecs.umich.edu ExecContext *xc) 4303114Sgblack@eecs.umich.edu{ 4313113Sgblack@eecs.umich.edu unsigned resource = xc->getSyscallArg(0); 4324061Sgblack@eecs.umich.edu TypedBufferArg<typename OS::rlimit> rlp(xc->getSyscallArg(1)); 4334061Sgblack@eecs.umich.edu 4344061Sgblack@eecs.umich.edu switch (resource) { 4353113Sgblack@eecs.umich.edu case OS::RLIMIT_STACK: 4363113Sgblack@eecs.umich.edu // max stack size in bytes: make up a number (2MB for now) 4373113Sgblack@eecs.umich.edu rlp->rlim_cur = rlp->rlim_max = 8 * 1024 * 1024; 4383113Sgblack@eecs.umich.edu break; 4393113Sgblack@eecs.umich.edu 4403113Sgblack@eecs.umich.edu default: 4413113Sgblack@eecs.umich.edu std::cerr << "getrlimitFunc: unimplemented resource " << resource << std::endl; 4423113Sgblack@eecs.umich.edu abort(); 4433113Sgblack@eecs.umich.edu break; 4443113Sgblack@eecs.umich.edu } 4453113Sgblack@eecs.umich.edu 4464189Sgblack@eecs.umich.edu rlp.copyOut(xc->mem); 4474189Sgblack@eecs.umich.edu return 0; 4483113Sgblack@eecs.umich.edu} 4493113Sgblack@eecs.umich.edu 4503113Sgblack@eecs.umich.edu/// Target gettimeofday() handler. 4513113Sgblack@eecs.umich.edutemplate <class OS> 4523113Sgblack@eecs.umich.eduint 4533113Sgblack@eecs.umich.edugettimeofdayFunc(SyscallDesc *desc, int callnum, Process *process, 4543113Sgblack@eecs.umich.edu ExecContext *xc) 4553113Sgblack@eecs.umich.edu{ 4563113Sgblack@eecs.umich.edu TypedBufferArg<typename OS::timeval> tp(xc->getSyscallArg(0)); 4573113Sgblack@eecs.umich.edu 4583113Sgblack@eecs.umich.edu getElapsedTime(tp->tv_sec, tp->tv_usec); 4593113Sgblack@eecs.umich.edu tp->tv_sec += seconds_since_epoch; 4603113Sgblack@eecs.umich.edu 4613113Sgblack@eecs.umich.edu tp.copyOut(xc->mem); 4623113Sgblack@eecs.umich.edu 4633113Sgblack@eecs.umich.edu return 0; 4643113Sgblack@eecs.umich.edu} 4653113Sgblack@eecs.umich.edu 4663113Sgblack@eecs.umich.edu 4673113Sgblack@eecs.umich.edu/// Target getrusage() function. 4683113Sgblack@eecs.umich.edutemplate <class OS> 4693113Sgblack@eecs.umich.eduint 4703113Sgblack@eecs.umich.edugetrusageFunc(SyscallDesc *desc, int callnum, Process *process, 4713113Sgblack@eecs.umich.edu ExecContext *xc) 4723113Sgblack@eecs.umich.edu{ 4733113Sgblack@eecs.umich.edu int who = xc->getSyscallArg(0); // THREAD, SELF, or CHILDREN 4743113Sgblack@eecs.umich.edu TypedBufferArg<typename OS::rusage> rup(xc->getSyscallArg(1)); 4753113Sgblack@eecs.umich.edu 4763113Sgblack@eecs.umich.edu if (who != OS::RUSAGE_SELF) { 4773113Sgblack@eecs.umich.edu // don't really handle THREAD or CHILDREN, but just warn and 4783113Sgblack@eecs.umich.edu // plow ahead 4793113Sgblack@eecs.umich.edu DCOUT(SyscallWarnings) 4803113Sgblack@eecs.umich.edu << "Warning: getrusage() only supports RUSAGE_SELF." 4813113Sgblack@eecs.umich.edu << " Parameter " << who << " ignored." << std::endl; 4826686Stjones1@inf.ed.ac.uk } 4833113Sgblack@eecs.umich.edu 4843113Sgblack@eecs.umich.edu getElapsedTime(rup->ru_utime.tv_sec, rup->ru_utime.tv_usec); 4853113Sgblack@eecs.umich.edu rup->ru_stime.tv_sec = 0; 486378SN/A rup->ru_stime.tv_usec = 0; 487378SN/A rup->ru_maxrss = 0; 488378SN/A rup->ru_ixrss = 0; 489360SN/A rup->ru_idrss = 0; 4901450SN/A rup->ru_isrss = 0; 4913114Sgblack@eecs.umich.edu rup->ru_minflt = 0; 4922680Sktlim@umich.edu rup->ru_majflt = 0; 493360SN/A rup->ru_nswap = 0; 4946701Sgblack@eecs.umich.edu rup->ru_inblock = 0; 4956701Sgblack@eecs.umich.edu rup->ru_oublock = 0; 4966701Sgblack@eecs.umich.edu rup->ru_msgsnd = 0; 497360SN/A rup->ru_msgrcv = 0; 4981969SN/A rup->ru_nsignals = 0; 499360SN/A rup->ru_nvcsw = 0; 500360SN/A rup->ru_nivcsw = 0; 501360SN/A 5021458SN/A rup.copyOut(xc->mem); 503360SN/A 504360SN/A return 0; 505360SN/A} 5064131Sbinkertn@umich.edu 5074131Sbinkertn@umich.edu#endif // __SIM_SYSCALL_EMUL_HH__ 5084131Sbinkertn@umich.edu