syscall_emul.hh revision 11911
1360SN/A/* 210850SGiacomo.Gabrielli@arm.com * Copyright (c) 2012-2013, 2015 ARM Limited 310796Sbrandon.potter@amd.com * Copyright (c) 2015 Advanced Micro Devices, Inc. 410027SChris.Adeniyi-Jones@arm.com * All rights reserved 510027SChris.Adeniyi-Jones@arm.com * 610027SChris.Adeniyi-Jones@arm.com * The license below extends only to copyright in the software and shall 710027SChris.Adeniyi-Jones@arm.com * not be construed as granting a license to any other intellectual 810027SChris.Adeniyi-Jones@arm.com * property including but not limited to intellectual property relating 910027SChris.Adeniyi-Jones@arm.com * to a hardware implementation of the functionality of the software 1010027SChris.Adeniyi-Jones@arm.com * licensed hereunder. You may use the software subject to the license 1110027SChris.Adeniyi-Jones@arm.com * terms below provided that you ensure that this notice is replicated 1210027SChris.Adeniyi-Jones@arm.com * unmodified and in its entirety in all distributions of the software, 1310027SChris.Adeniyi-Jones@arm.com * modified or unmodified, in source code or in binary form. 1410027SChris.Adeniyi-Jones@arm.com * 151458SN/A * Copyright (c) 2003-2005 The Regents of The University of Michigan 16360SN/A * All rights reserved. 17360SN/A * 18360SN/A * Redistribution and use in source and binary forms, with or without 19360SN/A * modification, are permitted provided that the following conditions are 20360SN/A * met: redistributions of source code must retain the above copyright 21360SN/A * notice, this list of conditions and the following disclaimer; 22360SN/A * redistributions in binary form must reproduce the above copyright 23360SN/A * notice, this list of conditions and the following disclaimer in the 24360SN/A * documentation and/or other materials provided with the distribution; 25360SN/A * neither the name of the copyright holders nor the names of its 26360SN/A * contributors may be used to endorse or promote products derived from 27360SN/A * this software without specific prior written permission. 28360SN/A * 29360SN/A * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 30360SN/A * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 31360SN/A * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 32360SN/A * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 33360SN/A * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 34360SN/A * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 35360SN/A * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 36360SN/A * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 37360SN/A * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 38360SN/A * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 39360SN/A * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 402665Ssaidi@eecs.umich.edu * 412665Ssaidi@eecs.umich.edu * Authors: Steve Reinhardt 422665Ssaidi@eecs.umich.edu * Kevin Lim 43360SN/A */ 44360SN/A 451354SN/A#ifndef __SIM_SYSCALL_EMUL_HH__ 461354SN/A#define __SIM_SYSCALL_EMUL_HH__ 47360SN/A 482764Sstever@eecs.umich.edu#define NO_STAT64 (defined(__APPLE__) || defined(__OpenBSD__) || \ 499202Spalle@lyckegaard.dk defined(__FreeBSD__) || defined(__CYGWIN__) || \ 509202Spalle@lyckegaard.dk defined(__NetBSD__)) 512064SN/A 5211799Sbrandon.potter@amd.com#define NO_STATFS (defined(__APPLE__) || defined(__OpenBSD__) || \ 5311799Sbrandon.potter@amd.com defined(__FreeBSD__) || defined(__NetBSD__)) 5411799Sbrandon.potter@amd.com 5511799Sbrandon.potter@amd.com#define NO_FALLOCATE (defined(__APPLE__) || defined(__OpenBSD__) || \ 5611799Sbrandon.potter@amd.com defined(__FreeBSD__) || defined(__NetBSD__)) 5711799Sbrandon.potter@amd.com 58360SN/A/// 59360SN/A/// @file syscall_emul.hh 60360SN/A/// 61360SN/A/// This file defines objects used to emulate syscalls from the target 62360SN/A/// application on the host machine. 63360SN/A 641809SN/A#ifdef __CYGWIN32__ 6511800Sbrandon.potter@amd.com#include <sys/fcntl.h> 6611392Sbrandon.potter@amd.com 671809SN/A#endif 6811392Sbrandon.potter@amd.com#include <fcntl.h> 6911383Sbrandon.potter@amd.com#include <sys/mman.h> 703113Sgblack@eecs.umich.edu#include <sys/stat.h> 7111799Sbrandon.potter@amd.com#if (NO_STATFS == 0) 7211759Sbrandon.potter@amd.com#include <sys/statfs.h> 7311812Sbaz21@cam.ac.uk#else 7411812Sbaz21@cam.ac.uk#include <sys/mount.h> 7511799Sbrandon.potter@amd.com#endif 768229Snate@binkert.org#include <sys/time.h> 778229Snate@binkert.org#include <sys/uio.h> 7811594Santhony.gutierrez@amd.com#include <unistd.h> 797075Snate@binkert.org 808229Snate@binkert.org#include <cerrno> 8111856Sbrandon.potter@amd.com#include <memory> 827075Snate@binkert.org#include <string> 83360SN/A 8411886Sbrandon.potter@amd.com#include "arch/utility.hh" 8511800Sbrandon.potter@amd.com#include "base/intmath.hh" 8611392Sbrandon.potter@amd.com#include "base/loader/object_file.hh" 872462SN/A#include "base/misc.hh" 881354SN/A#include "base/trace.hh" 896216Snate@binkert.org#include "base/types.hh" 906658Snate@binkert.org#include "config/the_isa.hh" 912474SN/A#include "cpu/base.hh" 922680Sktlim@umich.edu#include "cpu/thread_context.hh" 938229Snate@binkert.org#include "mem/page_table.hh" 9411886Sbrandon.potter@amd.com#include "params/Process.hh" 9510496Ssteve.reinhardt@amd.com#include "sim/emul_driver.hh" 9611911SBrandon.Potter@amd.com#include "sim/futex_map.hh" 978229Snate@binkert.org#include "sim/process.hh" 9811794Sbrandon.potter@amd.com#include "sim/syscall_debug_macros.hh" 9911886Sbrandon.potter@amd.com#include "sim/syscall_desc.hh" 10010497Ssteve.reinhardt@amd.com#include "sim/syscall_emul_buf.hh" 10111794Sbrandon.potter@amd.com#include "sim/syscall_return.hh" 102360SN/A 103360SN/A////////////////////////////////////////////////////////////////////// 104360SN/A// 105360SN/A// The following emulation functions are generic enough that they 106360SN/A// don't need to be recompiled for different emulated OS's. They are 107360SN/A// defined in sim/syscall_emul.cc. 108360SN/A// 109360SN/A////////////////////////////////////////////////////////////////////// 110360SN/A 111360SN/A 112378SN/A/// Handler for unimplemented syscalls that we haven't thought about. 1131706SN/ASyscallReturn unimplementedFunc(SyscallDesc *desc, int num, 11411851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 115378SN/A 116378SN/A/// Handler for unimplemented syscalls that we never intend to 117378SN/A/// implement (signal handling, etc.) and should not affect the correct 118378SN/A/// behavior of the program. Print a warning only if the appropriate 119378SN/A/// trace flag is enabled. Return success to the target program. 1201706SN/ASyscallReturn ignoreFunc(SyscallDesc *desc, int num, 12111851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 122360SN/A 12311760Sbrandon.potter@amd.com// Target fallocateFunc() handler. 12411760Sbrandon.potter@amd.comSyscallReturn fallocateFunc(SyscallDesc *desc, int num, 12511851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 12611760Sbrandon.potter@amd.com 1276109Ssanchezd@stanford.edu/// Target exit() handler: terminate current context. 1281706SN/ASyscallReturn exitFunc(SyscallDesc *desc, int num, 12911851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 130378SN/A 1316109Ssanchezd@stanford.edu/// Target exit_group() handler: terminate simulation. (exit all threads) 1326109Ssanchezd@stanford.eduSyscallReturn exitGroupFunc(SyscallDesc *desc, int num, 13311851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 1346109Ssanchezd@stanford.edu 13511886Sbrandon.potter@amd.com/// Target set_tid_address() handler. 13611886Sbrandon.potter@amd.comSyscallReturn setTidAddressFunc(SyscallDesc *desc, int num, 13711886Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 13811886Sbrandon.potter@amd.com 139378SN/A/// Target getpagesize() handler. 1401706SN/ASyscallReturn getpagesizeFunc(SyscallDesc *desc, int num, 14111851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 142378SN/A 1435748SSteve.Reinhardt@amd.com/// Target brk() handler: set brk address. 1445748SSteve.Reinhardt@amd.comSyscallReturn brkFunc(SyscallDesc *desc, int num, 14511851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 146378SN/A 147378SN/A/// Target close() handler. 1481706SN/ASyscallReturn closeFunc(SyscallDesc *desc, int num, 14911851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 150378SN/A 15111886Sbrandon.potter@amd.com// Target read() handler. 1521706SN/ASyscallReturn readFunc(SyscallDesc *desc, int num, 15311851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 154378SN/A 155378SN/A/// Target write() handler. 1561706SN/ASyscallReturn writeFunc(SyscallDesc *desc, int num, 15711851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 158378SN/A 159378SN/A/// Target lseek() handler. 1601706SN/ASyscallReturn lseekFunc(SyscallDesc *desc, int num, 16111851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 162378SN/A 1634118Sgblack@eecs.umich.edu/// Target _llseek() handler. 1644118Sgblack@eecs.umich.eduSyscallReturn _llseekFunc(SyscallDesc *desc, int num, 16511851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 1664118Sgblack@eecs.umich.edu 167378SN/A/// Target munmap() handler. 1681706SN/ASyscallReturn munmapFunc(SyscallDesc *desc, int num, 16911851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 170378SN/A 171378SN/A/// Target gethostname() handler. 1721706SN/ASyscallReturn gethostnameFunc(SyscallDesc *desc, int num, 17311851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 174360SN/A 1755513SMichael.Adler@intel.com/// Target getcwd() handler. 1765513SMichael.Adler@intel.comSyscallReturn getcwdFunc(SyscallDesc *desc, int num, 17711851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 1785513SMichael.Adler@intel.com 17910203SAli.Saidi@ARM.com/// Target readlink() handler. 18010203SAli.Saidi@ARM.comSyscallReturn readlinkFunc(SyscallDesc *desc, int num, 18111851Sbrandon.potter@amd.com Process *p, ThreadContext *tc, 18210203SAli.Saidi@ARM.com int index = 0); 1835513SMichael.Adler@intel.comSyscallReturn readlinkFunc(SyscallDesc *desc, int num, 18411851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 1855513SMichael.Adler@intel.com 186511SN/A/// Target unlink() handler. 18710633Smichaelupton@gmail.comSyscallReturn unlinkHelper(SyscallDesc *desc, int num, 18811851Sbrandon.potter@amd.com Process *p, ThreadContext *tc, 18910633Smichaelupton@gmail.com int index); 1901706SN/ASyscallReturn unlinkFunc(SyscallDesc *desc, int num, 19111851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 192511SN/A 1935513SMichael.Adler@intel.com/// Target mkdir() handler. 1945513SMichael.Adler@intel.comSyscallReturn mkdirFunc(SyscallDesc *desc, int num, 19511851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 1965513SMichael.Adler@intel.com 197511SN/A/// Target rename() handler. 1981706SN/ASyscallReturn renameFunc(SyscallDesc *desc, int num, 19911851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2001706SN/A 2011706SN/A 2021706SN/A/// Target truncate() handler. 2031706SN/ASyscallReturn truncateFunc(SyscallDesc *desc, int num, 20411851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2051706SN/A 2061706SN/A 2071706SN/A/// Target ftruncate() handler. 2081706SN/ASyscallReturn ftruncateFunc(SyscallDesc *desc, int num, 20911851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2101706SN/A 211511SN/A 2126703Svince@csl.cornell.edu/// Target truncate64() handler. 2136703Svince@csl.cornell.eduSyscallReturn truncate64Func(SyscallDesc *desc, int num, 21411851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2156703Svince@csl.cornell.edu 2166685Stjones1@inf.ed.ac.uk/// Target ftruncate64() handler. 2176685Stjones1@inf.ed.ac.ukSyscallReturn ftruncate64Func(SyscallDesc *desc, int num, 21811851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2196685Stjones1@inf.ed.ac.uk 2206685Stjones1@inf.ed.ac.uk 2215513SMichael.Adler@intel.com/// Target umask() handler. 2225513SMichael.Adler@intel.comSyscallReturn umaskFunc(SyscallDesc *desc, int num, 22311851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2245513SMichael.Adler@intel.com 22511885Sbrandon.potter@amd.com/// Target gettid() handler. 22611885Sbrandon.potter@amd.comSyscallReturn gettidFunc(SyscallDesc *desc, int num, 22711885Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2285513SMichael.Adler@intel.com 2291999SN/A/// Target chown() handler. 2301999SN/ASyscallReturn chownFunc(SyscallDesc *desc, int num, 23111851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2321999SN/A 23311885Sbrandon.potter@amd.com/// Target setpgid() handler. 23411885Sbrandon.potter@amd.comSyscallReturn setpgidFunc(SyscallDesc *desc, int num, 23511885Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2361999SN/A 2371999SN/A/// Target fchown() handler. 2381999SN/ASyscallReturn fchownFunc(SyscallDesc *desc, int num, 23911851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2401999SN/A 2413079Sstever@eecs.umich.edu/// Target dup() handler. 2423079Sstever@eecs.umich.eduSyscallReturn dupFunc(SyscallDesc *desc, int num, 24311851Sbrandon.potter@amd.com Process *process, ThreadContext *tc); 2443079Sstever@eecs.umich.edu 24511908SBrandon.Potter@amd.com/// Target dup2() handler. 24611908SBrandon.Potter@amd.comSyscallReturn dup2Func(SyscallDesc *desc, int num, 24711908SBrandon.Potter@amd.com Process *process, ThreadContext *tc); 24811908SBrandon.Potter@amd.com 24911875Sbrandon.potter@amd.com/// Target fcntl() handler. 2502093SN/ASyscallReturn fcntlFunc(SyscallDesc *desc, int num, 25111851Sbrandon.potter@amd.com Process *process, ThreadContext *tc); 2522093SN/A 2532687Sksewell@umich.edu/// Target fcntl64() handler. 2542687Sksewell@umich.eduSyscallReturn fcntl64Func(SyscallDesc *desc, int num, 25511851Sbrandon.potter@amd.com Process *process, ThreadContext *tc); 2562687Sksewell@umich.edu 2572238SN/A/// Target setuid() handler. 2582238SN/ASyscallReturn setuidFunc(SyscallDesc *desc, int num, 25911851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2602238SN/A 26111908SBrandon.Potter@amd.com/// Target pipe() handler. 26211908SBrandon.Potter@amd.comSyscallReturn pipeFunc(SyscallDesc *desc, int num, 26311908SBrandon.Potter@amd.com Process *p, ThreadContext *tc); 26411908SBrandon.Potter@amd.com 26511908SBrandon.Potter@amd.com/// Internal pipe() handler. 26611908SBrandon.Potter@amd.comSyscallReturn pipeImpl(SyscallDesc *desc, int num, Process *p, 26711908SBrandon.Potter@amd.com ThreadContext *tc, bool pseudoPipe); 26811908SBrandon.Potter@amd.com 2692238SN/A/// Target getpid() handler. 2702238SN/ASyscallReturn getpidFunc(SyscallDesc *desc, int num, 27111851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2722238SN/A 2732238SN/A/// Target getuid() handler. 2742238SN/ASyscallReturn getuidFunc(SyscallDesc *desc, int num, 27511851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2762238SN/A 2772238SN/A/// Target getgid() handler. 2782238SN/ASyscallReturn getgidFunc(SyscallDesc *desc, int num, 27911851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2802238SN/A 2812238SN/A/// Target getppid() handler. 2822238SN/ASyscallReturn getppidFunc(SyscallDesc *desc, int num, 28311851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2842238SN/A 2852238SN/A/// Target geteuid() handler. 2862238SN/ASyscallReturn geteuidFunc(SyscallDesc *desc, int num, 28711851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2882238SN/A 2892238SN/A/// Target getegid() handler. 2902238SN/ASyscallReturn getegidFunc(SyscallDesc *desc, int num, 29111851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2922238SN/A 2939455Smitch.hayenga+gem5@gmail.com/// Target access() handler 2949455Smitch.hayenga+gem5@gmail.comSyscallReturn accessFunc(SyscallDesc *desc, int num, 29511851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 29610203SAli.Saidi@ARM.comSyscallReturn accessFunc(SyscallDesc *desc, int num, 29711851Sbrandon.potter@amd.com Process *p, ThreadContext *tc, 29811851Sbrandon.potter@amd.com int index); 2999455Smitch.hayenga+gem5@gmail.com 3009112Smarc.orr@gmail.com/// Futex system call 30111906SBrandon.Potter@amd.com/// Implemented by Daniel Sanchez 30211906SBrandon.Potter@amd.com/// Used by printf's in multi-threaded apps 3039112Smarc.orr@gmail.comtemplate <class OS> 3049112Smarc.orr@gmail.comSyscallReturn 30511851Sbrandon.potter@amd.comfutexFunc(SyscallDesc *desc, int callnum, Process *process, 3069112Smarc.orr@gmail.com ThreadContext *tc) 3079112Smarc.orr@gmail.com{ 30811911SBrandon.Potter@amd.com using namespace std; 3099112Smarc.orr@gmail.com 31011911SBrandon.Potter@amd.com int index = 0; 31111911SBrandon.Potter@amd.com Addr uaddr = process->getSyscallArg(tc, index); 31211911SBrandon.Potter@amd.com int op = process->getSyscallArg(tc, index); 31311911SBrandon.Potter@amd.com int val = process->getSyscallArg(tc, index); 3149112Smarc.orr@gmail.com 31511911SBrandon.Potter@amd.com /* 31611911SBrandon.Potter@amd.com * Unsupported option that does not affect the correctness of the 31711911SBrandon.Potter@amd.com * application. This is a performance optimization utilized by Linux. 31811911SBrandon.Potter@amd.com */ 3199238Slluc.alvarez@bsc.es op &= ~OS::TGT_FUTEX_PRIVATE_FLAG; 3209112Smarc.orr@gmail.com 32111911SBrandon.Potter@amd.com FutexMap &futex_map = tc->getSystemPtr()->futexMap; 3229112Smarc.orr@gmail.com 32311911SBrandon.Potter@amd.com if (OS::TGT_FUTEX_WAIT == op) { 32411911SBrandon.Potter@amd.com // Ensure futex system call accessed atomically. 32511911SBrandon.Potter@amd.com BufferArg buf(uaddr, sizeof(int)); 32611911SBrandon.Potter@amd.com buf.copyIn(tc->getMemProxy()); 32711911SBrandon.Potter@amd.com int mem_val = *(int*)buf.bufferPtr(); 3289112Smarc.orr@gmail.com 32911911SBrandon.Potter@amd.com /* 33011911SBrandon.Potter@amd.com * The value in memory at uaddr is not equal with the expected val 33111911SBrandon.Potter@amd.com * (a different thread must have changed it before the system call was 33211911SBrandon.Potter@amd.com * invoked). In this case, we need to throw an error. 33311911SBrandon.Potter@amd.com */ 33411911SBrandon.Potter@amd.com if (val != mem_val) 3359112Smarc.orr@gmail.com return -OS::TGT_EWOULDBLOCK; 3369112Smarc.orr@gmail.com 33711911SBrandon.Potter@amd.com futex_map.suspend(uaddr, process->tgid(), tc); 33811911SBrandon.Potter@amd.com 3399112Smarc.orr@gmail.com return 0; 34011911SBrandon.Potter@amd.com } else if (OS::TGT_FUTEX_WAKE == op) { 34111911SBrandon.Potter@amd.com return futex_map.wakeup(uaddr, process->tgid(), val); 3429112Smarc.orr@gmail.com } 3439112Smarc.orr@gmail.com 34411911SBrandon.Potter@amd.com warn("futex: op %d not implemented; ignoring.", op); 34511911SBrandon.Potter@amd.com return -ENOSYS; 3469112Smarc.orr@gmail.com} 3479112Smarc.orr@gmail.com 3482238SN/A 3492238SN/A/// Pseudo Funcs - These functions use a different return convension, 3502238SN/A/// returning a second value in a register other than the normal return register 3512238SN/ASyscallReturn pipePseudoFunc(SyscallDesc *desc, int num, 35211851Sbrandon.potter@amd.com Process *process, ThreadContext *tc); 3532238SN/A 3542238SN/A/// Target getpidPseudo() handler. 3552238SN/ASyscallReturn getpidPseudoFunc(SyscallDesc *desc, int num, 35611851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3572238SN/A 3582238SN/A/// Target getuidPseudo() handler. 3592238SN/ASyscallReturn getuidPseudoFunc(SyscallDesc *desc, int num, 36011851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3612238SN/A 3622238SN/A/// Target getgidPseudo() handler. 3632238SN/ASyscallReturn getgidPseudoFunc(SyscallDesc *desc, int num, 36411851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3652238SN/A 3662238SN/A 3671354SN/A/// A readable name for 1,000,000, for converting microseconds to seconds. 3681354SN/Aconst int one_million = 1000000; 36910796Sbrandon.potter@amd.com/// A readable name for 1,000,000,000, for converting nanoseconds to seconds. 37010796Sbrandon.potter@amd.comconst int one_billion = 1000000000; 3711354SN/A 3721354SN/A/// Approximate seconds since the epoch (1/1/1970). About a billion, 3731354SN/A/// by my reckoning. We want to keep this a constant (not use the 3741354SN/A/// real-world time) to keep simulations repeatable. 3751354SN/Aconst unsigned seconds_since_epoch = 1000000000; 3761354SN/A 3771354SN/A/// Helper function to convert current elapsed time to seconds and 3781354SN/A/// microseconds. 3791354SN/Atemplate <class T1, class T2> 3801354SN/Avoid 38110796Sbrandon.potter@amd.comgetElapsedTimeMicro(T1 &sec, T2 &usec) 3821354SN/A{ 38310796Sbrandon.potter@amd.com uint64_t elapsed_usecs = curTick() / SimClock::Int::us; 3841354SN/A sec = elapsed_usecs / one_million; 3851354SN/A usec = elapsed_usecs % one_million; 3861354SN/A} 3871354SN/A 38810796Sbrandon.potter@amd.com/// Helper function to convert current elapsed time to seconds and 38910796Sbrandon.potter@amd.com/// nanoseconds. 39010796Sbrandon.potter@amd.comtemplate <class T1, class T2> 39110796Sbrandon.potter@amd.comvoid 39210796Sbrandon.potter@amd.comgetElapsedTimeNano(T1 &sec, T2 &nsec) 39310796Sbrandon.potter@amd.com{ 39410796Sbrandon.potter@amd.com uint64_t elapsed_nsecs = curTick() / SimClock::Int::ns; 39510796Sbrandon.potter@amd.com sec = elapsed_nsecs / one_billion; 39610796Sbrandon.potter@amd.com nsec = elapsed_nsecs % one_billion; 39710796Sbrandon.potter@amd.com} 39810796Sbrandon.potter@amd.com 399360SN/A////////////////////////////////////////////////////////////////////// 400360SN/A// 401360SN/A// The following emulation functions are generic, but need to be 402360SN/A// templated to account for differences in types, constants, etc. 403360SN/A// 404360SN/A////////////////////////////////////////////////////////////////////// 405360SN/A 40611759Sbrandon.potter@amd.com typedef struct statfs hst_statfs; 4073113Sgblack@eecs.umich.edu#if NO_STAT64 4083113Sgblack@eecs.umich.edu typedef struct stat hst_stat; 4093113Sgblack@eecs.umich.edu typedef struct stat hst_stat64; 4103113Sgblack@eecs.umich.edu#else 4113113Sgblack@eecs.umich.edu typedef struct stat hst_stat; 4123113Sgblack@eecs.umich.edu typedef struct stat64 hst_stat64; 4133113Sgblack@eecs.umich.edu#endif 4143113Sgblack@eecs.umich.edu 4153113Sgblack@eecs.umich.edu//// Helper function to convert a host stat buffer to a target stat 4163113Sgblack@eecs.umich.edu//// buffer. Also copies the target buffer out to the simulated 4173113Sgblack@eecs.umich.edu//// memory space. Used by stat(), fstat(), and lstat(). 4183113Sgblack@eecs.umich.edu 4193113Sgblack@eecs.umich.edutemplate <typename target_stat, typename host_stat> 4203113Sgblack@eecs.umich.edustatic void 4213113Sgblack@eecs.umich.educonvertStatBuf(target_stat &tgt, host_stat *host, bool fakeTTY = false) 4223113Sgblack@eecs.umich.edu{ 4234189Sgblack@eecs.umich.edu using namespace TheISA; 4244189Sgblack@eecs.umich.edu 4253113Sgblack@eecs.umich.edu if (fakeTTY) 4263113Sgblack@eecs.umich.edu tgt->st_dev = 0xA; 4273113Sgblack@eecs.umich.edu else 4283113Sgblack@eecs.umich.edu tgt->st_dev = host->st_dev; 4298737Skoansin.tan@gmail.com tgt->st_dev = TheISA::htog(tgt->st_dev); 4303113Sgblack@eecs.umich.edu tgt->st_ino = host->st_ino; 4318737Skoansin.tan@gmail.com tgt->st_ino = TheISA::htog(tgt->st_ino); 4323277Sgblack@eecs.umich.edu tgt->st_mode = host->st_mode; 4335515SMichael.Adler@intel.com if (fakeTTY) { 4345515SMichael.Adler@intel.com // Claim to be a character device 4355515SMichael.Adler@intel.com tgt->st_mode &= ~S_IFMT; // Clear S_IFMT 4365515SMichael.Adler@intel.com tgt->st_mode |= S_IFCHR; // Set S_IFCHR 4375515SMichael.Adler@intel.com } 4388737Skoansin.tan@gmail.com tgt->st_mode = TheISA::htog(tgt->st_mode); 4393277Sgblack@eecs.umich.edu tgt->st_nlink = host->st_nlink; 4408737Skoansin.tan@gmail.com tgt->st_nlink = TheISA::htog(tgt->st_nlink); 4413277Sgblack@eecs.umich.edu tgt->st_uid = host->st_uid; 4428737Skoansin.tan@gmail.com tgt->st_uid = TheISA::htog(tgt->st_uid); 4433277Sgblack@eecs.umich.edu tgt->st_gid = host->st_gid; 4448737Skoansin.tan@gmail.com tgt->st_gid = TheISA::htog(tgt->st_gid); 4453113Sgblack@eecs.umich.edu if (fakeTTY) 4463113Sgblack@eecs.umich.edu tgt->st_rdev = 0x880d; 4473113Sgblack@eecs.umich.edu else 4483113Sgblack@eecs.umich.edu tgt->st_rdev = host->st_rdev; 4498737Skoansin.tan@gmail.com tgt->st_rdev = TheISA::htog(tgt->st_rdev); 4503113Sgblack@eecs.umich.edu tgt->st_size = host->st_size; 4518737Skoansin.tan@gmail.com tgt->st_size = TheISA::htog(tgt->st_size); 4523114Sgblack@eecs.umich.edu tgt->st_atimeX = host->st_atime; 4538737Skoansin.tan@gmail.com tgt->st_atimeX = TheISA::htog(tgt->st_atimeX); 4543114Sgblack@eecs.umich.edu tgt->st_mtimeX = host->st_mtime; 4558737Skoansin.tan@gmail.com tgt->st_mtimeX = TheISA::htog(tgt->st_mtimeX); 4563114Sgblack@eecs.umich.edu tgt->st_ctimeX = host->st_ctime; 4578737Skoansin.tan@gmail.com tgt->st_ctimeX = TheISA::htog(tgt->st_ctimeX); 45811906SBrandon.Potter@amd.com // Force the block size to be 8KB. This helps to ensure buffered io works 4594061Sgblack@eecs.umich.edu // consistently across different hosts. 4604061Sgblack@eecs.umich.edu tgt->st_blksize = 0x2000; 4618737Skoansin.tan@gmail.com tgt->st_blksize = TheISA::htog(tgt->st_blksize); 4623113Sgblack@eecs.umich.edu tgt->st_blocks = host->st_blocks; 4638737Skoansin.tan@gmail.com tgt->st_blocks = TheISA::htog(tgt->st_blocks); 4643113Sgblack@eecs.umich.edu} 4653113Sgblack@eecs.umich.edu 4663113Sgblack@eecs.umich.edu// Same for stat64 4673113Sgblack@eecs.umich.edu 4683113Sgblack@eecs.umich.edutemplate <typename target_stat, typename host_stat64> 4693113Sgblack@eecs.umich.edustatic void 4703113Sgblack@eecs.umich.educonvertStat64Buf(target_stat &tgt, host_stat64 *host, bool fakeTTY = false) 4713113Sgblack@eecs.umich.edu{ 4724189Sgblack@eecs.umich.edu using namespace TheISA; 4734189Sgblack@eecs.umich.edu 4743113Sgblack@eecs.umich.edu convertStatBuf<target_stat, host_stat64>(tgt, host, fakeTTY); 4753113Sgblack@eecs.umich.edu#if defined(STAT_HAVE_NSEC) 4763113Sgblack@eecs.umich.edu tgt->st_atime_nsec = host->st_atime_nsec; 4778737Skoansin.tan@gmail.com tgt->st_atime_nsec = TheISA::htog(tgt->st_atime_nsec); 4783113Sgblack@eecs.umich.edu tgt->st_mtime_nsec = host->st_mtime_nsec; 4798737Skoansin.tan@gmail.com tgt->st_mtime_nsec = TheISA::htog(tgt->st_mtime_nsec); 4803113Sgblack@eecs.umich.edu tgt->st_ctime_nsec = host->st_ctime_nsec; 4818737Skoansin.tan@gmail.com tgt->st_ctime_nsec = TheISA::htog(tgt->st_ctime_nsec); 4823113Sgblack@eecs.umich.edu#else 4833113Sgblack@eecs.umich.edu tgt->st_atime_nsec = 0; 4843113Sgblack@eecs.umich.edu tgt->st_mtime_nsec = 0; 4853113Sgblack@eecs.umich.edu tgt->st_ctime_nsec = 0; 4863113Sgblack@eecs.umich.edu#endif 4873113Sgblack@eecs.umich.edu} 4883113Sgblack@eecs.umich.edu 48911906SBrandon.Potter@amd.com// Here are a couple of convenience functions 4903113Sgblack@eecs.umich.edutemplate<class OS> 4913113Sgblack@eecs.umich.edustatic void 4928852Sandreas.hansson@arm.comcopyOutStatBuf(SETranslatingPortProxy &mem, Addr addr, 49311906SBrandon.Potter@amd.com hst_stat *host, bool fakeTTY = false) 4943113Sgblack@eecs.umich.edu{ 4953113Sgblack@eecs.umich.edu typedef TypedBufferArg<typename OS::tgt_stat> tgt_stat_buf; 4963113Sgblack@eecs.umich.edu tgt_stat_buf tgt(addr); 4973113Sgblack@eecs.umich.edu convertStatBuf<tgt_stat_buf, hst_stat>(tgt, host, fakeTTY); 4983113Sgblack@eecs.umich.edu tgt.copyOut(mem); 4993113Sgblack@eecs.umich.edu} 5003113Sgblack@eecs.umich.edu 5013113Sgblack@eecs.umich.edutemplate<class OS> 5023113Sgblack@eecs.umich.edustatic void 5038852Sandreas.hansson@arm.comcopyOutStat64Buf(SETranslatingPortProxy &mem, Addr addr, 50411906SBrandon.Potter@amd.com hst_stat64 *host, bool fakeTTY = false) 5053113Sgblack@eecs.umich.edu{ 5063113Sgblack@eecs.umich.edu typedef TypedBufferArg<typename OS::tgt_stat64> tgt_stat_buf; 5073113Sgblack@eecs.umich.edu tgt_stat_buf tgt(addr); 5086686Stjones1@inf.ed.ac.uk convertStat64Buf<tgt_stat_buf, hst_stat64>(tgt, host, fakeTTY); 5093113Sgblack@eecs.umich.edu tgt.copyOut(mem); 5103113Sgblack@eecs.umich.edu} 5113113Sgblack@eecs.umich.edu 51211759Sbrandon.potter@amd.comtemplate <class OS> 51311759Sbrandon.potter@amd.comstatic void 51411759Sbrandon.potter@amd.comcopyOutStatfsBuf(SETranslatingPortProxy &mem, Addr addr, 51511759Sbrandon.potter@amd.com hst_statfs *host) 51611759Sbrandon.potter@amd.com{ 51711759Sbrandon.potter@amd.com TypedBufferArg<typename OS::tgt_statfs> tgt(addr); 51811759Sbrandon.potter@amd.com 51911812Sbaz21@cam.ac.uk tgt->f_type = TheISA::htog(host->f_type); 52011812Sbaz21@cam.ac.uk#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) 52111812Sbaz21@cam.ac.uk tgt->f_bsize = TheISA::htog(host->f_iosize); 52211759Sbrandon.potter@amd.com#else 52311812Sbaz21@cam.ac.uk tgt->f_bsize = TheISA::htog(host->f_bsize); 52411759Sbrandon.potter@amd.com#endif 52511759Sbrandon.potter@amd.com tgt->f_blocks = TheISA::htog(host->f_blocks); 52611759Sbrandon.potter@amd.com tgt->f_bfree = TheISA::htog(host->f_bfree); 52711759Sbrandon.potter@amd.com tgt->f_bavail = TheISA::htog(host->f_bavail); 52811759Sbrandon.potter@amd.com tgt->f_files = TheISA::htog(host->f_files); 52911759Sbrandon.potter@amd.com tgt->f_ffree = TheISA::htog(host->f_ffree); 53011759Sbrandon.potter@amd.com memcpy(&tgt->f_fsid, &host->f_fsid, sizeof(host->f_fsid)); 53111812Sbaz21@cam.ac.uk#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) 53211812Sbaz21@cam.ac.uk tgt->f_namelen = TheISA::htog(host->f_namemax); 53311812Sbaz21@cam.ac.uk tgt->f_frsize = TheISA::htog(host->f_bsize); 53411812Sbaz21@cam.ac.uk#elif defined(__APPLE__) 53511812Sbaz21@cam.ac.uk tgt->f_namelen = 0; 53611812Sbaz21@cam.ac.uk tgt->f_frsize = 0; 53711812Sbaz21@cam.ac.uk#else 53811759Sbrandon.potter@amd.com tgt->f_namelen = TheISA::htog(host->f_namelen); 53911759Sbrandon.potter@amd.com tgt->f_frsize = TheISA::htog(host->f_frsize); 54011812Sbaz21@cam.ac.uk#endif 54111812Sbaz21@cam.ac.uk#if defined(__linux__) 54211759Sbrandon.potter@amd.com memcpy(&tgt->f_spare, &host->f_spare, sizeof(host->f_spare)); 54311812Sbaz21@cam.ac.uk#else 54411812Sbaz21@cam.ac.uk /* 54511812Sbaz21@cam.ac.uk * The fields are different sizes per OS. Don't bother with 54611812Sbaz21@cam.ac.uk * f_spare or f_reserved on non-Linux for now. 54711812Sbaz21@cam.ac.uk */ 54811812Sbaz21@cam.ac.uk memset(&tgt->f_spare, 0, sizeof(tgt->f_spare)); 54911812Sbaz21@cam.ac.uk#endif 55011759Sbrandon.potter@amd.com 55111759Sbrandon.potter@amd.com tgt.copyOut(mem); 55211759Sbrandon.potter@amd.com} 55311759Sbrandon.potter@amd.com 554378SN/A/// Target ioctl() handler. For the most part, programs call ioctl() 555378SN/A/// only to find out if their stdout is a tty, to determine whether to 5569141Smarc.orr@gmail.com/// do line or block buffering. We always claim that output fds are 5579141Smarc.orr@gmail.com/// not TTYs to provide repeatable results. 558360SN/Atemplate <class OS> 5591450SN/ASyscallReturn 56011856Sbrandon.potter@amd.comioctlFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 561360SN/A{ 5626701Sgblack@eecs.umich.edu int index = 0; 56311856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 56411856Sbrandon.potter@amd.com unsigned req = p->getSyscallArg(tc, index); 565360SN/A 56610930Sbrandon.potter@amd.com DPRINTF(SyscallVerbose, "ioctl(%d, 0x%x, ...)\n", tgt_fd, req); 567360SN/A 56811856Sbrandon.potter@amd.com if (OS::isTtyReq(req)) 56911856Sbrandon.potter@amd.com return -ENOTTY; 57010496Ssteve.reinhardt@amd.com 57111856Sbrandon.potter@amd.com auto dfdp = std::dynamic_pointer_cast<DeviceFDEntry>((*p->fds)[tgt_fd]); 57211856Sbrandon.potter@amd.com if (!dfdp) 5731458SN/A return -EBADF; 574360SN/A 57511856Sbrandon.potter@amd.com /** 57611856Sbrandon.potter@amd.com * If the driver is valid, issue the ioctl through it. Otherwise, 57711856Sbrandon.potter@amd.com * there's an implicit assumption that the device is a TTY type and we 57811856Sbrandon.potter@amd.com * return that we do not have a valid TTY. 57911856Sbrandon.potter@amd.com */ 58011856Sbrandon.potter@amd.com EmulatedDriver *emul_driver = dfdp->getDriver(); 58111856Sbrandon.potter@amd.com if (emul_driver) 58211856Sbrandon.potter@amd.com return emul_driver->ioctl(p, tc, req); 58310496Ssteve.reinhardt@amd.com 58411856Sbrandon.potter@amd.com /** 58511856Sbrandon.potter@amd.com * For lack of a better return code, return ENOTTY. Ideally, we should 58611856Sbrandon.potter@amd.com * return something better here, but at least we issue the warning. 58711856Sbrandon.potter@amd.com */ 58811856Sbrandon.potter@amd.com warn("Unsupported ioctl call (return ENOTTY): ioctl(%d, 0x%x, ...) @ \n", 58910930Sbrandon.potter@amd.com tgt_fd, req, tc->pcState()); 5909141Smarc.orr@gmail.com return -ENOTTY; 591360SN/A} 592360SN/A 593360SN/Atemplate <class OS> 59411907SBrandon.Potter@amd.comSyscallReturn 59511907SBrandon.Potter@amd.comopenImpl(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc, 59611907SBrandon.Potter@amd.com bool isopenat) 597360SN/A{ 59811907SBrandon.Potter@amd.com int index = 0; 59911907SBrandon.Potter@amd.com int tgt_dirfd = -1; 60011907SBrandon.Potter@amd.com 60111907SBrandon.Potter@amd.com /** 60211907SBrandon.Potter@amd.com * If using the openat variant, read in the target directory file 60311907SBrandon.Potter@amd.com * descriptor from the simulated process. 60411907SBrandon.Potter@amd.com */ 60511907SBrandon.Potter@amd.com if (isopenat) 60611907SBrandon.Potter@amd.com tgt_dirfd = p->getSyscallArg(tc, index); 60711907SBrandon.Potter@amd.com 60811907SBrandon.Potter@amd.com /** 60911907SBrandon.Potter@amd.com * Retrieve the simulated process' memory proxy and then read in the path 61011907SBrandon.Potter@amd.com * string from that memory space into the host's working memory space. 61111907SBrandon.Potter@amd.com */ 612360SN/A std::string path; 61311907SBrandon.Potter@amd.com if (!tc->getMemProxy().tryReadString(path, p->getSyscallArg(tc, index))) 6141458SN/A return -EFAULT; 615360SN/A 61611907SBrandon.Potter@amd.com#ifdef __CYGWIN32__ 61711907SBrandon.Potter@amd.com int host_flags = O_BINARY; 61811907SBrandon.Potter@amd.com#else 61911907SBrandon.Potter@amd.com int host_flags = 0; 62011907SBrandon.Potter@amd.com#endif 62111907SBrandon.Potter@amd.com /** 62211907SBrandon.Potter@amd.com * Translate target flags into host flags. Flags exist which are not 62311907SBrandon.Potter@amd.com * ported between architectures which can cause check failures. 62411907SBrandon.Potter@amd.com */ 62511907SBrandon.Potter@amd.com int tgt_flags = p->getSyscallArg(tc, index); 626360SN/A for (int i = 0; i < OS::NUM_OPEN_FLAGS; i++) { 62711907SBrandon.Potter@amd.com if (tgt_flags & OS::openFlagTable[i].tgtFlag) { 62811907SBrandon.Potter@amd.com tgt_flags &= ~OS::openFlagTable[i].tgtFlag; 62911907SBrandon.Potter@amd.com host_flags |= OS::openFlagTable[i].hostFlag; 630360SN/A } 631360SN/A } 63211907SBrandon.Potter@amd.com if (tgt_flags) { 63311907SBrandon.Potter@amd.com warn("open%s: cannot decode flags 0x%x", 63411907SBrandon.Potter@amd.com isopenat ? "at" : "", tgt_flags); 63511907SBrandon.Potter@amd.com } 636360SN/A#ifdef __CYGWIN32__ 63711907SBrandon.Potter@amd.com host_flags |= O_BINARY; 638360SN/A#endif 639360SN/A 64011907SBrandon.Potter@amd.com int mode = p->getSyscallArg(tc, index); 6413669Sbinkertn@umich.edu 64211907SBrandon.Potter@amd.com /** 64311907SBrandon.Potter@amd.com * If the simulated process called open or openat with AT_FDCWD specified, 64411907SBrandon.Potter@amd.com * take the current working directory value which was passed into the 64511907SBrandon.Potter@amd.com * process class as a Python parameter and append the current path to 64611907SBrandon.Potter@amd.com * create a full path. 64711907SBrandon.Potter@amd.com * Otherwise, openat with a valid target directory file descriptor has 64811907SBrandon.Potter@amd.com * been called. If the path option, which was passed in as a parameter, 64911907SBrandon.Potter@amd.com * is not absolute, retrieve the directory file descriptor's path and 65011907SBrandon.Potter@amd.com * prepend it to the path passed in as a parameter. 65111907SBrandon.Potter@amd.com * In every case, we should have a full path (which is relevant to the 65211907SBrandon.Potter@amd.com * host) to work with after this block has been passed. 65311907SBrandon.Potter@amd.com */ 65411907SBrandon.Potter@amd.com if (!isopenat || (isopenat && tgt_dirfd == OS::TGT_AT_FDCWD)) { 65511907SBrandon.Potter@amd.com path = p->fullPath(path); 65611907SBrandon.Potter@amd.com } else if (!startswith(path, "/")) { 65711907SBrandon.Potter@amd.com std::shared_ptr<FDEntry> fdep = ((*p->fds)[tgt_dirfd]); 65811907SBrandon.Potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(fdep); 65911907SBrandon.Potter@amd.com if (!ffdp) 66011907SBrandon.Potter@amd.com return -EBADF; 66111907SBrandon.Potter@amd.com path.insert(0, ffdp->getFileName()); 66211907SBrandon.Potter@amd.com } 6631706SN/A 66411907SBrandon.Potter@amd.com /** 66511907SBrandon.Potter@amd.com * Since this is an emulated environment, we create pseudo file 66611907SBrandon.Potter@amd.com * descriptors for device requests that have been registered with 66711907SBrandon.Potter@amd.com * the process class through Python; this allows us to create a file 66811907SBrandon.Potter@amd.com * descriptor for subsequent ioctl or mmap calls. 66911907SBrandon.Potter@amd.com */ 67010496Ssteve.reinhardt@amd.com if (startswith(path, "/dev/")) { 67110496Ssteve.reinhardt@amd.com std::string filename = path.substr(strlen("/dev/")); 67211907SBrandon.Potter@amd.com EmulatedDriver *drv = p->findDriver(filename); 67311907SBrandon.Potter@amd.com if (drv) { 67411907SBrandon.Potter@amd.com DPRINTF_SYSCALL(Verbose, "open%s: passing call to " 67511907SBrandon.Potter@amd.com "driver open with path[%s]\n", 67611907SBrandon.Potter@amd.com isopenat ? "at" : "", path.c_str()); 67711907SBrandon.Potter@amd.com return drv->open(p, tc, mode, host_flags); 67810496Ssteve.reinhardt@amd.com } 67911907SBrandon.Potter@amd.com /** 68011907SBrandon.Potter@amd.com * Fall through here for pass through to host devices, such 68111907SBrandon.Potter@amd.com * as /dev/zero 68211907SBrandon.Potter@amd.com */ 68310496Ssteve.reinhardt@amd.com } 68410496Ssteve.reinhardt@amd.com 68511907SBrandon.Potter@amd.com /** 68611907SBrandon.Potter@amd.com * Some special paths and files cannot be called on the host and need 68711907SBrandon.Potter@amd.com * to be handled as special cases inside the simulator. 68811907SBrandon.Potter@amd.com * If the full path that was created above does not match any of the 68911907SBrandon.Potter@amd.com * special cases, pass it through to the open call on the host to let 69011907SBrandon.Potter@amd.com * the host open the file on our behalf. 69111907SBrandon.Potter@amd.com * If the host cannot open the file, return the host's error code back 69211907SBrandon.Potter@amd.com * through the system call to the simulated process. 69311907SBrandon.Potter@amd.com */ 69411907SBrandon.Potter@amd.com int sim_fd = -1; 69511907SBrandon.Potter@amd.com std::vector<std::string> special_paths = 69611907SBrandon.Potter@amd.com { "/proc/", "/system/", "/sys/", "/platform/", "/etc/passwd" }; 69711907SBrandon.Potter@amd.com for (auto entry : special_paths) { 69811907SBrandon.Potter@amd.com if (startswith(path, entry)) 69911907SBrandon.Potter@amd.com sim_fd = OS::openSpecialFile(path, p, tc); 70011907SBrandon.Potter@amd.com } 70111907SBrandon.Potter@amd.com if (sim_fd == -1) { 70211907SBrandon.Potter@amd.com sim_fd = open(path.c_str(), host_flags, mode); 70311907SBrandon.Potter@amd.com } 70411907SBrandon.Potter@amd.com if (sim_fd == -1) { 70511907SBrandon.Potter@amd.com int local = -errno; 70611907SBrandon.Potter@amd.com DPRINTF_SYSCALL(Verbose, "open%s: failed -> path:%s\n", 70711907SBrandon.Potter@amd.com isopenat ? "at" : "", path.c_str()); 70811907SBrandon.Potter@amd.com return local; 70911907SBrandon.Potter@amd.com } 710360SN/A 71111907SBrandon.Potter@amd.com /** 71211907SBrandon.Potter@amd.com * The file was opened successfully and needs to be recorded in the 71311907SBrandon.Potter@amd.com * process' file descriptor array so that it can be retrieved later. 71411907SBrandon.Potter@amd.com * The target file descriptor that is chosen will be the lowest unused 71511907SBrandon.Potter@amd.com * file descriptor. 71611907SBrandon.Potter@amd.com * Return the indirect target file descriptor back to the simulated 71711907SBrandon.Potter@amd.com * process to act as a handle for the opened file. 71811907SBrandon.Potter@amd.com */ 71911907SBrandon.Potter@amd.com auto ffdp = std::make_shared<FileFDEntry>(sim_fd, host_flags, path, 0); 72011907SBrandon.Potter@amd.com int tgt_fd = p->fds->allocFD(ffdp); 72111907SBrandon.Potter@amd.com DPRINTF_SYSCALL(Verbose, "open%s: sim_fd[%d], target_fd[%d] -> path:%s\n", 72211907SBrandon.Potter@amd.com isopenat ? "at" : "", sim_fd, tgt_fd, path.c_str()); 72311907SBrandon.Potter@amd.com return tgt_fd; 724360SN/A} 725360SN/A 72610027SChris.Adeniyi-Jones@arm.com/// Target open() handler. 72710027SChris.Adeniyi-Jones@arm.comtemplate <class OS> 72810027SChris.Adeniyi-Jones@arm.comSyscallReturn 72911851Sbrandon.potter@amd.comopenFunc(SyscallDesc *desc, int callnum, Process *process, 73010027SChris.Adeniyi-Jones@arm.com ThreadContext *tc) 73110027SChris.Adeniyi-Jones@arm.com{ 73211907SBrandon.Potter@amd.com return openImpl<OS>(desc, callnum, process, tc, false); 73310027SChris.Adeniyi-Jones@arm.com} 73410027SChris.Adeniyi-Jones@arm.com 73510027SChris.Adeniyi-Jones@arm.com/// Target openat() handler. 73610027SChris.Adeniyi-Jones@arm.comtemplate <class OS> 73710027SChris.Adeniyi-Jones@arm.comSyscallReturn 73811851Sbrandon.potter@amd.comopenatFunc(SyscallDesc *desc, int callnum, Process *process, 73911851Sbrandon.potter@amd.com ThreadContext *tc) 74010027SChris.Adeniyi-Jones@arm.com{ 74111907SBrandon.Potter@amd.com return openImpl<OS>(desc, callnum, process, tc, true); 74210027SChris.Adeniyi-Jones@arm.com} 74310027SChris.Adeniyi-Jones@arm.com 74410633Smichaelupton@gmail.com/// Target unlinkat() handler. 74510633Smichaelupton@gmail.comtemplate <class OS> 74610633Smichaelupton@gmail.comSyscallReturn 74711851Sbrandon.potter@amd.comunlinkatFunc(SyscallDesc *desc, int callnum, Process *process, 74810633Smichaelupton@gmail.com ThreadContext *tc) 74910633Smichaelupton@gmail.com{ 75010633Smichaelupton@gmail.com int index = 0; 75110633Smichaelupton@gmail.com int dirfd = process->getSyscallArg(tc, index); 75210633Smichaelupton@gmail.com if (dirfd != OS::TGT_AT_FDCWD) 75310633Smichaelupton@gmail.com warn("unlinkat: first argument not AT_FDCWD; unlikely to work"); 75410633Smichaelupton@gmail.com 75510633Smichaelupton@gmail.com return unlinkHelper(desc, callnum, process, tc, 1); 75610633Smichaelupton@gmail.com} 75710633Smichaelupton@gmail.com 75810203SAli.Saidi@ARM.com/// Target facessat() handler 75910203SAli.Saidi@ARM.comtemplate <class OS> 76010203SAli.Saidi@ARM.comSyscallReturn 76111851Sbrandon.potter@amd.comfaccessatFunc(SyscallDesc *desc, int callnum, Process *process, 76211851Sbrandon.potter@amd.com ThreadContext *tc) 76310203SAli.Saidi@ARM.com{ 76410203SAli.Saidi@ARM.com int index = 0; 76510203SAli.Saidi@ARM.com int dirfd = process->getSyscallArg(tc, index); 76610203SAli.Saidi@ARM.com if (dirfd != OS::TGT_AT_FDCWD) 76710203SAli.Saidi@ARM.com warn("faccessat: first argument not AT_FDCWD; unlikely to work"); 76810203SAli.Saidi@ARM.com return accessFunc(desc, callnum, process, tc, 1); 76910203SAli.Saidi@ARM.com} 77010203SAli.Saidi@ARM.com 77110203SAli.Saidi@ARM.com/// Target readlinkat() handler 77210203SAli.Saidi@ARM.comtemplate <class OS> 77310203SAli.Saidi@ARM.comSyscallReturn 77411851Sbrandon.potter@amd.comreadlinkatFunc(SyscallDesc *desc, int callnum, Process *process, 77511851Sbrandon.potter@amd.com ThreadContext *tc) 77610203SAli.Saidi@ARM.com{ 77710203SAli.Saidi@ARM.com int index = 0; 77810203SAli.Saidi@ARM.com int dirfd = process->getSyscallArg(tc, index); 77910203SAli.Saidi@ARM.com if (dirfd != OS::TGT_AT_FDCWD) 78010203SAli.Saidi@ARM.com warn("openat: first argument not AT_FDCWD; unlikely to work"); 78110203SAli.Saidi@ARM.com return readlinkFunc(desc, callnum, process, tc, 1); 78210203SAli.Saidi@ARM.com} 78310203SAli.Saidi@ARM.com 78410850SGiacomo.Gabrielli@arm.com/// Target renameat() handler. 78510850SGiacomo.Gabrielli@arm.comtemplate <class OS> 78610850SGiacomo.Gabrielli@arm.comSyscallReturn 78711851Sbrandon.potter@amd.comrenameatFunc(SyscallDesc *desc, int callnum, Process *process, 78810850SGiacomo.Gabrielli@arm.com ThreadContext *tc) 78910850SGiacomo.Gabrielli@arm.com{ 79010850SGiacomo.Gabrielli@arm.com int index = 0; 79110850SGiacomo.Gabrielli@arm.com 79210850SGiacomo.Gabrielli@arm.com int olddirfd = process->getSyscallArg(tc, index); 79310850SGiacomo.Gabrielli@arm.com if (olddirfd != OS::TGT_AT_FDCWD) 79410850SGiacomo.Gabrielli@arm.com warn("renameat: first argument not AT_FDCWD; unlikely to work"); 79510850SGiacomo.Gabrielli@arm.com 79610850SGiacomo.Gabrielli@arm.com std::string old_name; 79710850SGiacomo.Gabrielli@arm.com 79810850SGiacomo.Gabrielli@arm.com if (!tc->getMemProxy().tryReadString(old_name, 79910850SGiacomo.Gabrielli@arm.com process->getSyscallArg(tc, index))) 80010850SGiacomo.Gabrielli@arm.com return -EFAULT; 80110850SGiacomo.Gabrielli@arm.com 80210850SGiacomo.Gabrielli@arm.com int newdirfd = process->getSyscallArg(tc, index); 80310850SGiacomo.Gabrielli@arm.com if (newdirfd != OS::TGT_AT_FDCWD) 80410850SGiacomo.Gabrielli@arm.com warn("renameat: third argument not AT_FDCWD; unlikely to work"); 80510850SGiacomo.Gabrielli@arm.com 80610850SGiacomo.Gabrielli@arm.com std::string new_name; 80710850SGiacomo.Gabrielli@arm.com 80810850SGiacomo.Gabrielli@arm.com if (!tc->getMemProxy().tryReadString(new_name, 80910850SGiacomo.Gabrielli@arm.com process->getSyscallArg(tc, index))) 81010850SGiacomo.Gabrielli@arm.com return -EFAULT; 81110850SGiacomo.Gabrielli@arm.com 81210850SGiacomo.Gabrielli@arm.com // Adjust path for current working directory 81310850SGiacomo.Gabrielli@arm.com old_name = process->fullPath(old_name); 81410850SGiacomo.Gabrielli@arm.com new_name = process->fullPath(new_name); 81510850SGiacomo.Gabrielli@arm.com 81610850SGiacomo.Gabrielli@arm.com int result = rename(old_name.c_str(), new_name.c_str()); 81710850SGiacomo.Gabrielli@arm.com return (result == -1) ? -errno : result; 81810850SGiacomo.Gabrielli@arm.com} 81910850SGiacomo.Gabrielli@arm.com 8206640Svince@csl.cornell.edu/// Target sysinfo() handler. 8216640Svince@csl.cornell.edutemplate <class OS> 8226640Svince@csl.cornell.eduSyscallReturn 82311851Sbrandon.potter@amd.comsysinfoFunc(SyscallDesc *desc, int callnum, Process *process, 82411851Sbrandon.potter@amd.com ThreadContext *tc) 8256640Svince@csl.cornell.edu{ 8266640Svince@csl.cornell.edu 8276701Sgblack@eecs.umich.edu int index = 0; 8286701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::tgt_sysinfo> 82910793Sbrandon.potter@amd.com sysinfo(process->getSyscallArg(tc, index)); 8306640Svince@csl.cornell.edu 83111758Sbrandon.potter@amd.com sysinfo->uptime = seconds_since_epoch; 83211758Sbrandon.potter@amd.com sysinfo->totalram = process->system->memSize(); 83311758Sbrandon.potter@amd.com sysinfo->mem_unit = 1; 8346640Svince@csl.cornell.edu 8358706Sandreas.hansson@arm.com sysinfo.copyOut(tc->getMemProxy()); 8366640Svince@csl.cornell.edu 8376701Sgblack@eecs.umich.edu return 0; 8386640Svince@csl.cornell.edu} 839360SN/A 8401999SN/A/// Target chmod() handler. 8411999SN/Atemplate <class OS> 8421999SN/ASyscallReturn 84311851Sbrandon.potter@amd.comchmodFunc(SyscallDesc *desc, int callnum, Process *process, 8442680Sktlim@umich.edu ThreadContext *tc) 8451999SN/A{ 8461999SN/A std::string path; 8471999SN/A 8486701Sgblack@eecs.umich.edu int index = 0; 8498852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 8506701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 8511999SN/A return -EFAULT; 8526701Sgblack@eecs.umich.edu } 8531999SN/A 8546701Sgblack@eecs.umich.edu uint32_t mode = process->getSyscallArg(tc, index); 8551999SN/A mode_t hostMode = 0; 8561999SN/A 8571999SN/A // XXX translate mode flags via OS::something??? 8581999SN/A hostMode = mode; 8591999SN/A 8603669Sbinkertn@umich.edu // Adjust path for current working directory 8613669Sbinkertn@umich.edu path = process->fullPath(path); 8623669Sbinkertn@umich.edu 8631999SN/A // do the chmod 8641999SN/A int result = chmod(path.c_str(), hostMode); 8651999SN/A if (result < 0) 8662218SN/A return -errno; 8671999SN/A 8681999SN/A return 0; 8691999SN/A} 8701999SN/A 8711999SN/A 8721999SN/A/// Target fchmod() handler. 8731999SN/Atemplate <class OS> 8741999SN/ASyscallReturn 87511856Sbrandon.potter@amd.comfchmodFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 8761999SN/A{ 8776701Sgblack@eecs.umich.edu int index = 0; 87811856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 87911856Sbrandon.potter@amd.com uint32_t mode = p->getSyscallArg(tc, index); 88010931Sbrandon.potter@amd.com 88111856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 88211856Sbrandon.potter@amd.com if (!ffdp) 8831999SN/A return -EBADF; 88411856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 8851999SN/A 88611856Sbrandon.potter@amd.com mode_t hostMode = mode; 8871999SN/A 88811856Sbrandon.potter@amd.com int result = fchmod(sim_fd, hostMode); 8891999SN/A 89011856Sbrandon.potter@amd.com return (result < 0) ? -errno : 0; 8911999SN/A} 8921999SN/A 8935877Shsul@eecs.umich.edu/// Target mremap() handler. 8945877Shsul@eecs.umich.edutemplate <class OS> 8955877Shsul@eecs.umich.eduSyscallReturn 89611851Sbrandon.potter@amd.commremapFunc(SyscallDesc *desc, int callnum, Process *process, ThreadContext *tc) 8975877Shsul@eecs.umich.edu{ 8986701Sgblack@eecs.umich.edu int index = 0; 8996701Sgblack@eecs.umich.edu Addr start = process->getSyscallArg(tc, index); 9006701Sgblack@eecs.umich.edu uint64_t old_length = process->getSyscallArg(tc, index); 9016701Sgblack@eecs.umich.edu uint64_t new_length = process->getSyscallArg(tc, index); 9026701Sgblack@eecs.umich.edu uint64_t flags = process->getSyscallArg(tc, index); 90310027SChris.Adeniyi-Jones@arm.com uint64_t provided_address = 0; 90410027SChris.Adeniyi-Jones@arm.com bool use_provided_address = flags & OS::TGT_MREMAP_FIXED; 90510027SChris.Adeniyi-Jones@arm.com 90610027SChris.Adeniyi-Jones@arm.com if (use_provided_address) 90710027SChris.Adeniyi-Jones@arm.com provided_address = process->getSyscallArg(tc, index); 9085877Shsul@eecs.umich.edu 90910318Sandreas.hansson@arm.com if ((start % TheISA::PageBytes != 0) || 91010318Sandreas.hansson@arm.com (provided_address % TheISA::PageBytes != 0)) { 9115877Shsul@eecs.umich.edu warn("mremap failing: arguments not page aligned"); 9125877Shsul@eecs.umich.edu return -EINVAL; 9135877Shsul@eecs.umich.edu } 9145877Shsul@eecs.umich.edu 91510486Stjablin@gmail.com new_length = roundUp(new_length, TheISA::PageBytes); 91610486Stjablin@gmail.com 9175877Shsul@eecs.umich.edu if (new_length > old_length) { 91811905SBrandon.Potter@amd.com std::shared_ptr<MemState> mem_state = process->memState; 91911905SBrandon.Potter@amd.com Addr mmap_end = mem_state->getMmapEnd(); 92011905SBrandon.Potter@amd.com 92111905SBrandon.Potter@amd.com if ((start + old_length) == mmap_end && 92210027SChris.Adeniyi-Jones@arm.com (!use_provided_address || provided_address == start)) { 9235877Shsul@eecs.umich.edu uint64_t diff = new_length - old_length; 92411905SBrandon.Potter@amd.com process->allocateMem(mmap_end, diff); 92511905SBrandon.Potter@amd.com mem_state->setMmapEnd(mmap_end + diff); 9265877Shsul@eecs.umich.edu return start; 9275877Shsul@eecs.umich.edu } else { 92810027SChris.Adeniyi-Jones@arm.com if (!use_provided_address && !(flags & OS::TGT_MREMAP_MAYMOVE)) { 9295877Shsul@eecs.umich.edu warn("can't remap here and MREMAP_MAYMOVE flag not set\n"); 9305877Shsul@eecs.umich.edu return -ENOMEM; 9315877Shsul@eecs.umich.edu } else { 93210027SChris.Adeniyi-Jones@arm.com uint64_t new_start = use_provided_address ? 93311905SBrandon.Potter@amd.com provided_address : mmap_end; 93410027SChris.Adeniyi-Jones@arm.com process->pTable->remap(start, old_length, new_start); 93510027SChris.Adeniyi-Jones@arm.com warn("mremapping to new vaddr %08p-%08p, adding %d\n", 93610027SChris.Adeniyi-Jones@arm.com new_start, new_start + new_length, 93710027SChris.Adeniyi-Jones@arm.com new_length - old_length); 9385877Shsul@eecs.umich.edu // add on the remaining unallocated pages 93910027SChris.Adeniyi-Jones@arm.com process->allocateMem(new_start + old_length, 94010027SChris.Adeniyi-Jones@arm.com new_length - old_length, 94110027SChris.Adeniyi-Jones@arm.com use_provided_address /* clobber */); 94210027SChris.Adeniyi-Jones@arm.com if (!use_provided_address) 94311905SBrandon.Potter@amd.com mem_state->setMmapEnd(mmap_end + new_length); 94410027SChris.Adeniyi-Jones@arm.com if (use_provided_address && 94511905SBrandon.Potter@amd.com new_start + new_length > mem_state->getMmapEnd()) { 94610027SChris.Adeniyi-Jones@arm.com // something fishy going on here, at least notify the user 94710027SChris.Adeniyi-Jones@arm.com // @todo: increase mmap_end? 94810027SChris.Adeniyi-Jones@arm.com warn("mmap region limit exceeded with MREMAP_FIXED\n"); 94910027SChris.Adeniyi-Jones@arm.com } 95010027SChris.Adeniyi-Jones@arm.com warn("returning %08p as start\n", new_start); 95110027SChris.Adeniyi-Jones@arm.com return new_start; 9525877Shsul@eecs.umich.edu } 9535877Shsul@eecs.umich.edu } 9545877Shsul@eecs.umich.edu } else { 95510027SChris.Adeniyi-Jones@arm.com if (use_provided_address && provided_address != start) 95610027SChris.Adeniyi-Jones@arm.com process->pTable->remap(start, new_length, provided_address); 9578601Ssteve.reinhardt@amd.com process->pTable->unmap(start + new_length, old_length - new_length); 95810027SChris.Adeniyi-Jones@arm.com return use_provided_address ? provided_address : start; 9595877Shsul@eecs.umich.edu } 9605877Shsul@eecs.umich.edu} 9611999SN/A 962378SN/A/// Target stat() handler. 963360SN/Atemplate <class OS> 9641450SN/ASyscallReturn 96511851Sbrandon.potter@amd.comstatFunc(SyscallDesc *desc, int callnum, Process *process, 9662680Sktlim@umich.edu ThreadContext *tc) 967360SN/A{ 968360SN/A std::string path; 969360SN/A 9706701Sgblack@eecs.umich.edu int index = 0; 9718852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 9726701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 9736701Sgblack@eecs.umich.edu return -EFAULT; 9746701Sgblack@eecs.umich.edu } 9756701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 976360SN/A 9773669Sbinkertn@umich.edu // Adjust path for current working directory 9783669Sbinkertn@umich.edu path = process->fullPath(path); 9793669Sbinkertn@umich.edu 980360SN/A struct stat hostBuf; 981360SN/A int result = stat(path.c_str(), &hostBuf); 982360SN/A 983360SN/A if (result < 0) 9842218SN/A return -errno; 985360SN/A 9868706Sandreas.hansson@arm.com copyOutStatBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 987360SN/A 9881458SN/A return 0; 989360SN/A} 990360SN/A 991360SN/A 9925074Ssaidi@eecs.umich.edu/// Target stat64() handler. 9935074Ssaidi@eecs.umich.edutemplate <class OS> 9945074Ssaidi@eecs.umich.eduSyscallReturn 99511851Sbrandon.potter@amd.comstat64Func(SyscallDesc *desc, int callnum, Process *process, 9965074Ssaidi@eecs.umich.edu ThreadContext *tc) 9975074Ssaidi@eecs.umich.edu{ 9985074Ssaidi@eecs.umich.edu std::string path; 9995074Ssaidi@eecs.umich.edu 10006701Sgblack@eecs.umich.edu int index = 0; 10018852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 10026701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) 10035074Ssaidi@eecs.umich.edu return -EFAULT; 10046701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 10055074Ssaidi@eecs.umich.edu 10065074Ssaidi@eecs.umich.edu // Adjust path for current working directory 10075074Ssaidi@eecs.umich.edu path = process->fullPath(path); 10085074Ssaidi@eecs.umich.edu 10095208Ssaidi@eecs.umich.edu#if NO_STAT64 10105208Ssaidi@eecs.umich.edu struct stat hostBuf; 10115208Ssaidi@eecs.umich.edu int result = stat(path.c_str(), &hostBuf); 10125208Ssaidi@eecs.umich.edu#else 10135074Ssaidi@eecs.umich.edu struct stat64 hostBuf; 10145074Ssaidi@eecs.umich.edu int result = stat64(path.c_str(), &hostBuf); 10155208Ssaidi@eecs.umich.edu#endif 10165074Ssaidi@eecs.umich.edu 10175074Ssaidi@eecs.umich.edu if (result < 0) 10185074Ssaidi@eecs.umich.edu return -errno; 10195074Ssaidi@eecs.umich.edu 10208706Sandreas.hansson@arm.com copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 10215074Ssaidi@eecs.umich.edu 10225074Ssaidi@eecs.umich.edu return 0; 10235074Ssaidi@eecs.umich.edu} 10245074Ssaidi@eecs.umich.edu 10255074Ssaidi@eecs.umich.edu 102610027SChris.Adeniyi-Jones@arm.com/// Target fstatat64() handler. 102710027SChris.Adeniyi-Jones@arm.comtemplate <class OS> 102810027SChris.Adeniyi-Jones@arm.comSyscallReturn 102911851Sbrandon.potter@amd.comfstatat64Func(SyscallDesc *desc, int callnum, Process *process, 103010027SChris.Adeniyi-Jones@arm.com ThreadContext *tc) 103110027SChris.Adeniyi-Jones@arm.com{ 103210027SChris.Adeniyi-Jones@arm.com int index = 0; 103310027SChris.Adeniyi-Jones@arm.com int dirfd = process->getSyscallArg(tc, index); 103410027SChris.Adeniyi-Jones@arm.com if (dirfd != OS::TGT_AT_FDCWD) 103510793Sbrandon.potter@amd.com warn("fstatat64: first argument not AT_FDCWD; unlikely to work"); 103610027SChris.Adeniyi-Jones@arm.com 103710027SChris.Adeniyi-Jones@arm.com std::string path; 103810027SChris.Adeniyi-Jones@arm.com if (!tc->getMemProxy().tryReadString(path, 103910027SChris.Adeniyi-Jones@arm.com process->getSyscallArg(tc, index))) 104010027SChris.Adeniyi-Jones@arm.com return -EFAULT; 104110027SChris.Adeniyi-Jones@arm.com Addr bufPtr = process->getSyscallArg(tc, index); 104210027SChris.Adeniyi-Jones@arm.com 104310027SChris.Adeniyi-Jones@arm.com // Adjust path for current working directory 104410027SChris.Adeniyi-Jones@arm.com path = process->fullPath(path); 104510027SChris.Adeniyi-Jones@arm.com 104610027SChris.Adeniyi-Jones@arm.com#if NO_STAT64 104710027SChris.Adeniyi-Jones@arm.com struct stat hostBuf; 104810027SChris.Adeniyi-Jones@arm.com int result = stat(path.c_str(), &hostBuf); 104910027SChris.Adeniyi-Jones@arm.com#else 105010027SChris.Adeniyi-Jones@arm.com struct stat64 hostBuf; 105110027SChris.Adeniyi-Jones@arm.com int result = stat64(path.c_str(), &hostBuf); 105210027SChris.Adeniyi-Jones@arm.com#endif 105310027SChris.Adeniyi-Jones@arm.com 105410027SChris.Adeniyi-Jones@arm.com if (result < 0) 105510027SChris.Adeniyi-Jones@arm.com return -errno; 105610027SChris.Adeniyi-Jones@arm.com 105710027SChris.Adeniyi-Jones@arm.com copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 105810027SChris.Adeniyi-Jones@arm.com 105910027SChris.Adeniyi-Jones@arm.com return 0; 106010027SChris.Adeniyi-Jones@arm.com} 106110027SChris.Adeniyi-Jones@arm.com 106210027SChris.Adeniyi-Jones@arm.com 10631999SN/A/// Target fstat64() handler. 10641999SN/Atemplate <class OS> 10651999SN/ASyscallReturn 106611856Sbrandon.potter@amd.comfstat64Func(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 10671999SN/A{ 10686701Sgblack@eecs.umich.edu int index = 0; 106911856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 107011856Sbrandon.potter@amd.com Addr bufPtr = p->getSyscallArg(tc, index); 107110931Sbrandon.potter@amd.com 107211856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 107311856Sbrandon.potter@amd.com if (!ffdp) 10741999SN/A return -EBADF; 107511856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 10761999SN/A 10772764Sstever@eecs.umich.edu#if NO_STAT64 10782064SN/A struct stat hostBuf; 107910931Sbrandon.potter@amd.com int result = fstat(sim_fd, &hostBuf); 10802064SN/A#else 10812064SN/A struct stat64 hostBuf; 108210931Sbrandon.potter@amd.com int result = fstat64(sim_fd, &hostBuf); 10832064SN/A#endif 10841999SN/A 10851999SN/A if (result < 0) 10862218SN/A return -errno; 10871999SN/A 108810931Sbrandon.potter@amd.com copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf, (sim_fd == 1)); 10891999SN/A 10901999SN/A return 0; 10911999SN/A} 10921999SN/A 10931999SN/A 1094378SN/A/// Target lstat() handler. 1095360SN/Atemplate <class OS> 10961450SN/ASyscallReturn 109711851Sbrandon.potter@amd.comlstatFunc(SyscallDesc *desc, int callnum, Process *process, 10982680Sktlim@umich.edu ThreadContext *tc) 1099360SN/A{ 1100360SN/A std::string path; 1101360SN/A 11026701Sgblack@eecs.umich.edu int index = 0; 11038852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 11046701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 11056701Sgblack@eecs.umich.edu return -EFAULT; 11066701Sgblack@eecs.umich.edu } 11076701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 1108360SN/A 11093669Sbinkertn@umich.edu // Adjust path for current working directory 11103669Sbinkertn@umich.edu path = process->fullPath(path); 11113669Sbinkertn@umich.edu 1112360SN/A struct stat hostBuf; 1113360SN/A int result = lstat(path.c_str(), &hostBuf); 1114360SN/A 1115360SN/A if (result < 0) 11161458SN/A return -errno; 1117360SN/A 11188706Sandreas.hansson@arm.com copyOutStatBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 1119360SN/A 11201458SN/A return 0; 1121360SN/A} 1122360SN/A 11231999SN/A/// Target lstat64() handler. 11241999SN/Atemplate <class OS> 11251999SN/ASyscallReturn 112611851Sbrandon.potter@amd.comlstat64Func(SyscallDesc *desc, int callnum, Process *process, 11272680Sktlim@umich.edu ThreadContext *tc) 11281999SN/A{ 11291999SN/A std::string path; 11301999SN/A 11316701Sgblack@eecs.umich.edu int index = 0; 11328852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 11336701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 11346701Sgblack@eecs.umich.edu return -EFAULT; 11356701Sgblack@eecs.umich.edu } 11366701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 11371999SN/A 11383669Sbinkertn@umich.edu // Adjust path for current working directory 11393669Sbinkertn@umich.edu path = process->fullPath(path); 11403669Sbinkertn@umich.edu 11412764Sstever@eecs.umich.edu#if NO_STAT64 11422064SN/A struct stat hostBuf; 11432064SN/A int result = lstat(path.c_str(), &hostBuf); 11442064SN/A#else 11451999SN/A struct stat64 hostBuf; 11461999SN/A int result = lstat64(path.c_str(), &hostBuf); 11472064SN/A#endif 11481999SN/A 11491999SN/A if (result < 0) 11501999SN/A return -errno; 11511999SN/A 11528706Sandreas.hansson@arm.com copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 11531999SN/A 11541999SN/A return 0; 11551999SN/A} 11561999SN/A 1157378SN/A/// Target fstat() handler. 1158360SN/Atemplate <class OS> 11591450SN/ASyscallReturn 116011856Sbrandon.potter@amd.comfstatFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 1161360SN/A{ 11626701Sgblack@eecs.umich.edu int index = 0; 116311856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 116411856Sbrandon.potter@amd.com Addr bufPtr = p->getSyscallArg(tc, index); 1165360SN/A 116611380Salexandru.dutu@amd.com DPRINTF_SYSCALL(Verbose, "fstat(%d, ...)\n", tgt_fd); 1167360SN/A 116811856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 116911856Sbrandon.potter@amd.com if (!ffdp) 11701458SN/A return -EBADF; 117111856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 1172360SN/A 1173360SN/A struct stat hostBuf; 117410931Sbrandon.potter@amd.com int result = fstat(sim_fd, &hostBuf); 1175360SN/A 1176360SN/A if (result < 0) 11771458SN/A return -errno; 1178360SN/A 117910931Sbrandon.potter@amd.com copyOutStatBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf, (sim_fd == 1)); 11802021SN/A 11811458SN/A return 0; 1182360SN/A} 1183360SN/A 1184360SN/A 11851706SN/A/// Target statfs() handler. 11861706SN/Atemplate <class OS> 11871706SN/ASyscallReturn 118811851Sbrandon.potter@amd.comstatfsFunc(SyscallDesc *desc, int callnum, Process *process, 11892680Sktlim@umich.edu ThreadContext *tc) 11901706SN/A{ 119111799Sbrandon.potter@amd.com#if NO_STATFS 119211799Sbrandon.potter@amd.com warn("Host OS cannot support calls to statfs. Ignoring syscall"); 119311799Sbrandon.potter@amd.com#else 11941706SN/A std::string path; 11951706SN/A 11966701Sgblack@eecs.umich.edu int index = 0; 11978852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 11986701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 11996701Sgblack@eecs.umich.edu return -EFAULT; 12006701Sgblack@eecs.umich.edu } 12016701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 12021706SN/A 12033669Sbinkertn@umich.edu // Adjust path for current working directory 12043669Sbinkertn@umich.edu path = process->fullPath(path); 12053669Sbinkertn@umich.edu 12061706SN/A struct statfs hostBuf; 12071706SN/A int result = statfs(path.c_str(), &hostBuf); 12081706SN/A 12091706SN/A if (result < 0) 12102218SN/A return -errno; 12111706SN/A 121211759Sbrandon.potter@amd.com copyOutStatfsBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 121311799Sbrandon.potter@amd.com#endif 12141706SN/A return 0; 12151706SN/A} 12161706SN/A 121711886Sbrandon.potter@amd.comtemplate <class OS> 121811886Sbrandon.potter@amd.comSyscallReturn 121911886Sbrandon.potter@amd.comcloneFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 122011886Sbrandon.potter@amd.com{ 122111886Sbrandon.potter@amd.com int index = 0; 122211886Sbrandon.potter@amd.com TheISA::IntReg flags = p->getSyscallArg(tc, index); 122311886Sbrandon.potter@amd.com TheISA::IntReg newStack = p->getSyscallArg(tc, index); 122411886Sbrandon.potter@amd.com Addr ptidPtr = p->getSyscallArg(tc, index); 122511886Sbrandon.potter@amd.com Addr ctidPtr = p->getSyscallArg(tc, index); 122611886Sbrandon.potter@amd.com Addr tlsPtr M5_VAR_USED = p->getSyscallArg(tc, index); 122711886Sbrandon.potter@amd.com 122811886Sbrandon.potter@amd.com if (((flags & OS::TGT_CLONE_SIGHAND)&& !(flags & OS::TGT_CLONE_VM)) || 122911886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_THREAD) && !(flags & OS::TGT_CLONE_SIGHAND)) || 123011886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_FS) && (flags & OS::TGT_CLONE_NEWNS)) || 123111886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_NEWIPC) && (flags & OS::TGT_CLONE_SYSVSEM)) || 123211886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_NEWPID) && (flags & OS::TGT_CLONE_THREAD)) || 123311886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_VM) && !(newStack))) 123411886Sbrandon.potter@amd.com return -EINVAL; 123511886Sbrandon.potter@amd.com 123611886Sbrandon.potter@amd.com ThreadContext *ctc; 123711886Sbrandon.potter@amd.com if (!(ctc = p->findFreeContext())) 123811886Sbrandon.potter@amd.com fatal("clone: no spare thread context in system"); 123911886Sbrandon.potter@amd.com 124011886Sbrandon.potter@amd.com /** 124111886Sbrandon.potter@amd.com * Note that ProcessParams is generated by swig and there are no other 124211886Sbrandon.potter@amd.com * examples of how to create anything but this default constructor. The 124311886Sbrandon.potter@amd.com * fields are manually initialized instead of passing parameters to the 124411886Sbrandon.potter@amd.com * constructor. 124511886Sbrandon.potter@amd.com */ 124611886Sbrandon.potter@amd.com ProcessParams *pp = new ProcessParams(); 124711886Sbrandon.potter@amd.com pp->executable.assign(*(new std::string(p->progName()))); 124811886Sbrandon.potter@amd.com pp->cmd.push_back(*(new std::string(p->progName()))); 124911886Sbrandon.potter@amd.com pp->system = p->system; 125011886Sbrandon.potter@amd.com pp->cwd.assign(p->getcwd()); 125111886Sbrandon.potter@amd.com pp->input.assign("stdin"); 125211886Sbrandon.potter@amd.com pp->output.assign("stdout"); 125311886Sbrandon.potter@amd.com pp->errout.assign("stderr"); 125411886Sbrandon.potter@amd.com pp->uid = p->uid(); 125511886Sbrandon.potter@amd.com pp->euid = p->euid(); 125611886Sbrandon.potter@amd.com pp->gid = p->gid(); 125711886Sbrandon.potter@amd.com pp->egid = p->egid(); 125811886Sbrandon.potter@amd.com 125911886Sbrandon.potter@amd.com /* Find the first free PID that's less than the maximum */ 126011886Sbrandon.potter@amd.com std::set<int> const& pids = p->system->PIDs; 126111886Sbrandon.potter@amd.com int temp_pid = *pids.begin(); 126211886Sbrandon.potter@amd.com do { 126311886Sbrandon.potter@amd.com temp_pid++; 126411886Sbrandon.potter@amd.com } while (pids.find(temp_pid) != pids.end()); 126511886Sbrandon.potter@amd.com if (temp_pid >= System::maxPID) 126611886Sbrandon.potter@amd.com fatal("temp_pid is too large: %d", temp_pid); 126711886Sbrandon.potter@amd.com 126811886Sbrandon.potter@amd.com pp->pid = temp_pid; 126911886Sbrandon.potter@amd.com pp->ppid = (flags & OS::TGT_CLONE_THREAD) ? p->ppid() : p->pid(); 127011886Sbrandon.potter@amd.com Process *cp = pp->create(); 127111886Sbrandon.potter@amd.com delete pp; 127211886Sbrandon.potter@amd.com 127311886Sbrandon.potter@amd.com Process *owner = ctc->getProcessPtr(); 127411886Sbrandon.potter@amd.com ctc->setProcessPtr(cp); 127511886Sbrandon.potter@amd.com cp->assignThreadContext(ctc->contextId()); 127611886Sbrandon.potter@amd.com owner->revokeThreadContext(ctc->contextId()); 127711886Sbrandon.potter@amd.com 127811886Sbrandon.potter@amd.com if (flags & OS::TGT_CLONE_PARENT_SETTID) { 127911886Sbrandon.potter@amd.com BufferArg ptidBuf(ptidPtr, sizeof(long)); 128011886Sbrandon.potter@amd.com long *ptid = (long *)ptidBuf.bufferPtr(); 128111886Sbrandon.potter@amd.com *ptid = cp->pid(); 128211886Sbrandon.potter@amd.com ptidBuf.copyOut(tc->getMemProxy()); 128311886Sbrandon.potter@amd.com } 128411886Sbrandon.potter@amd.com 128511886Sbrandon.potter@amd.com cp->initState(); 128611886Sbrandon.potter@amd.com p->clone(tc, ctc, cp, flags); 128711886Sbrandon.potter@amd.com 128811911SBrandon.Potter@amd.com if (flags & OS::TGT_CLONE_THREAD) { 128911911SBrandon.Potter@amd.com delete cp->sigchld; 129011911SBrandon.Potter@amd.com cp->sigchld = p->sigchld; 129111911SBrandon.Potter@amd.com } else if (flags & OS::TGT_SIGCHLD) { 129211911SBrandon.Potter@amd.com *cp->sigchld = true; 129311911SBrandon.Potter@amd.com } 129411911SBrandon.Potter@amd.com 129511886Sbrandon.potter@amd.com if (flags & OS::TGT_CLONE_CHILD_SETTID) { 129611886Sbrandon.potter@amd.com BufferArg ctidBuf(ctidPtr, sizeof(long)); 129711886Sbrandon.potter@amd.com long *ctid = (long *)ctidBuf.bufferPtr(); 129811886Sbrandon.potter@amd.com *ctid = cp->pid(); 129911886Sbrandon.potter@amd.com ctidBuf.copyOut(ctc->getMemProxy()); 130011886Sbrandon.potter@amd.com } 130111886Sbrandon.potter@amd.com 130211886Sbrandon.potter@amd.com if (flags & OS::TGT_CLONE_CHILD_CLEARTID) 130311886Sbrandon.potter@amd.com cp->childClearTID = (uint64_t)ctidPtr; 130411886Sbrandon.potter@amd.com 130511886Sbrandon.potter@amd.com ctc->clearArchRegs(); 130611886Sbrandon.potter@amd.com 130711886Sbrandon.potter@amd.com#if THE_ISA == ALPHA_ISA 130811886Sbrandon.potter@amd.com TheISA::copyMiscRegs(tc, ctc); 130911886Sbrandon.potter@amd.com#elif THE_ISA == SPARC_ISA 131011886Sbrandon.potter@amd.com TheISA::copyRegs(tc, ctc); 131111886Sbrandon.potter@amd.com ctc->setIntReg(TheISA::NumIntArchRegs + 6, 0); 131211886Sbrandon.potter@amd.com ctc->setIntReg(TheISA::NumIntArchRegs + 4, 0); 131311886Sbrandon.potter@amd.com ctc->setIntReg(TheISA::NumIntArchRegs + 3, TheISA::NWindows - 2); 131411886Sbrandon.potter@amd.com ctc->setIntReg(TheISA::NumIntArchRegs + 5, TheISA::NWindows); 131511886Sbrandon.potter@amd.com ctc->setMiscReg(TheISA::MISCREG_CWP, 0); 131611886Sbrandon.potter@amd.com ctc->setIntReg(TheISA::NumIntArchRegs + 7, 0); 131711886Sbrandon.potter@amd.com ctc->setMiscRegNoEffect(TheISA::MISCREG_TL, 0); 131811886Sbrandon.potter@amd.com ctc->setMiscReg(TheISA::MISCREG_ASI, TheISA::ASI_PRIMARY); 131911886Sbrandon.potter@amd.com for (int y = 8; y < 32; y++) 132011886Sbrandon.potter@amd.com ctc->setIntReg(y, tc->readIntReg(y)); 132111886Sbrandon.potter@amd.com#elif THE_ISA == ARM_ISA or THE_ISA == X86_ISA 132211886Sbrandon.potter@amd.com TheISA::copyRegs(tc, ctc); 132311886Sbrandon.potter@amd.com#endif 132411886Sbrandon.potter@amd.com 132511886Sbrandon.potter@amd.com#if THE_ISA == X86_ISA 132611886Sbrandon.potter@amd.com if (flags & OS::TGT_CLONE_SETTLS) { 132711886Sbrandon.potter@amd.com ctc->setMiscRegNoEffect(TheISA::MISCREG_FS_BASE, tlsPtr); 132811886Sbrandon.potter@amd.com ctc->setMiscRegNoEffect(TheISA::MISCREG_FS_EFF_BASE, tlsPtr); 132911886Sbrandon.potter@amd.com } 133011886Sbrandon.potter@amd.com#endif 133111886Sbrandon.potter@amd.com 133211886Sbrandon.potter@amd.com if (newStack) 133311886Sbrandon.potter@amd.com ctc->setIntReg(TheISA::StackPointerReg, newStack); 133411886Sbrandon.potter@amd.com 133511886Sbrandon.potter@amd.com cp->setSyscallReturn(ctc, 0); 133611886Sbrandon.potter@amd.com 133711886Sbrandon.potter@amd.com#if THE_ISA == ALPHA_ISA 133811886Sbrandon.potter@amd.com ctc->setIntReg(TheISA::SyscallSuccessReg, 0); 133911886Sbrandon.potter@amd.com#elif THE_ISA == SPARC_ISA 134011886Sbrandon.potter@amd.com tc->setIntReg(TheISA::SyscallPseudoReturnReg, 0); 134111886Sbrandon.potter@amd.com ctc->setIntReg(TheISA::SyscallPseudoReturnReg, 1); 134211886Sbrandon.potter@amd.com#endif 134311886Sbrandon.potter@amd.com 134411886Sbrandon.potter@amd.com ctc->pcState(tc->nextInstAddr()); 134511886Sbrandon.potter@amd.com ctc->activate(); 134611886Sbrandon.potter@amd.com 134711886Sbrandon.potter@amd.com return cp->pid(); 134811886Sbrandon.potter@amd.com} 13491706SN/A 13501706SN/A/// Target fstatfs() handler. 13511706SN/Atemplate <class OS> 13521706SN/ASyscallReturn 135311856Sbrandon.potter@amd.comfstatfsFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 13541706SN/A{ 13556701Sgblack@eecs.umich.edu int index = 0; 135611856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 135711856Sbrandon.potter@amd.com Addr bufPtr = p->getSyscallArg(tc, index); 13581706SN/A 135911856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 136011856Sbrandon.potter@amd.com if (!ffdp) 13611706SN/A return -EBADF; 136211856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 13631706SN/A 13641706SN/A struct statfs hostBuf; 136510931Sbrandon.potter@amd.com int result = fstatfs(sim_fd, &hostBuf); 13661706SN/A 13671706SN/A if (result < 0) 13682218SN/A return -errno; 13691706SN/A 137011759Sbrandon.potter@amd.com copyOutStatfsBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 13711706SN/A 13721706SN/A return 0; 13731706SN/A} 13741706SN/A 13751706SN/A 13761999SN/A/// Target writev() handler. 13771999SN/Atemplate <class OS> 13781999SN/ASyscallReturn 137911856Sbrandon.potter@amd.comwritevFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 13801999SN/A{ 13816701Sgblack@eecs.umich.edu int index = 0; 138211856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 138310931Sbrandon.potter@amd.com 138411856Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 138511856Sbrandon.potter@amd.com if (!hbfdp) 13861999SN/A return -EBADF; 138711856Sbrandon.potter@amd.com int sim_fd = hbfdp->getSimFD(); 13881999SN/A 138911856Sbrandon.potter@amd.com SETranslatingPortProxy &prox = tc->getMemProxy(); 139011856Sbrandon.potter@amd.com uint64_t tiov_base = p->getSyscallArg(tc, index); 139111856Sbrandon.potter@amd.com size_t count = p->getSyscallArg(tc, index); 13921999SN/A struct iovec hiov[count]; 13936227Snate@binkert.org for (size_t i = 0; i < count; ++i) { 13941999SN/A typename OS::tgt_iovec tiov; 13952461SN/A 139611856Sbrandon.potter@amd.com prox.readBlob(tiov_base + i*sizeof(typename OS::tgt_iovec), 139711856Sbrandon.potter@amd.com (uint8_t*)&tiov, sizeof(typename OS::tgt_iovec)); 13988737Skoansin.tan@gmail.com hiov[i].iov_len = TheISA::gtoh(tiov.iov_len); 13991999SN/A hiov[i].iov_base = new char [hiov[i].iov_len]; 140011856Sbrandon.potter@amd.com prox.readBlob(TheISA::gtoh(tiov.iov_base), (uint8_t *)hiov[i].iov_base, 140111856Sbrandon.potter@amd.com hiov[i].iov_len); 14021999SN/A } 14031999SN/A 140410931Sbrandon.potter@amd.com int result = writev(sim_fd, hiov, count); 14051999SN/A 14066227Snate@binkert.org for (size_t i = 0; i < count; ++i) 14071999SN/A delete [] (char *)hiov[i].iov_base; 14081999SN/A 14091999SN/A if (result < 0) 14102218SN/A return -errno; 14111999SN/A 141210629Sjthestness@gmail.com return result; 14131999SN/A} 14141999SN/A 141511385Sbrandon.potter@amd.com/// Real mmap handler. 1416360SN/Atemplate <class OS> 14171450SN/ASyscallReturn 141811851Sbrandon.potter@amd.commmapImpl(SyscallDesc *desc, int num, Process *p, ThreadContext *tc, 141911385Sbrandon.potter@amd.com bool is_mmap2) 1420360SN/A{ 14216701Sgblack@eecs.umich.edu int index = 0; 14226701Sgblack@eecs.umich.edu Addr start = p->getSyscallArg(tc, index); 14236701Sgblack@eecs.umich.edu uint64_t length = p->getSyscallArg(tc, index); 142411383Sbrandon.potter@amd.com int prot = p->getSyscallArg(tc, index); 142511383Sbrandon.potter@amd.com int tgt_flags = p->getSyscallArg(tc, index); 14268324Ssteve.reinhardt@amd.com int tgt_fd = p->getSyscallArg(tc, index); 142710486Stjablin@gmail.com int offset = p->getSyscallArg(tc, index); 1428360SN/A 142911385Sbrandon.potter@amd.com if (is_mmap2) 143011385Sbrandon.potter@amd.com offset *= TheISA::PageBytes; 14319008Sgblack@eecs.umich.edu 143211383Sbrandon.potter@amd.com if (start & (TheISA::PageBytes - 1) || 143311383Sbrandon.potter@amd.com offset & (TheISA::PageBytes - 1) || 143411383Sbrandon.potter@amd.com (tgt_flags & OS::TGT_MAP_PRIVATE && 143511383Sbrandon.potter@amd.com tgt_flags & OS::TGT_MAP_SHARED) || 143611383Sbrandon.potter@amd.com (!(tgt_flags & OS::TGT_MAP_PRIVATE) && 143711383Sbrandon.potter@amd.com !(tgt_flags & OS::TGT_MAP_SHARED)) || 143811383Sbrandon.potter@amd.com !length) { 143911383Sbrandon.potter@amd.com return -EINVAL; 144011383Sbrandon.potter@amd.com } 14418324Ssteve.reinhardt@amd.com 144211383Sbrandon.potter@amd.com if ((prot & PROT_WRITE) && (tgt_flags & OS::TGT_MAP_SHARED)) { 144311383Sbrandon.potter@amd.com // With shared mmaps, there are two cases to consider: 144411383Sbrandon.potter@amd.com // 1) anonymous: writes should modify the mapping and this should be 144511383Sbrandon.potter@amd.com // visible to observers who share the mapping. Currently, it's 144611383Sbrandon.potter@amd.com // difficult to update the shared mapping because there's no 144711383Sbrandon.potter@amd.com // structure which maintains information about the which virtual 144811383Sbrandon.potter@amd.com // memory areas are shared. If that structure existed, it would be 144911383Sbrandon.potter@amd.com // possible to make the translations point to the same frames. 145011383Sbrandon.potter@amd.com // 2) file-backed: writes should modify the mapping and the file 145111383Sbrandon.potter@amd.com // which is backed by the mapping. The shared mapping problem is the 145211383Sbrandon.potter@amd.com // same as what was mentioned about the anonymous mappings. For 145311383Sbrandon.potter@amd.com // file-backed mappings, the writes to the file are difficult 145411383Sbrandon.potter@amd.com // because it requires syncing what the mapping holds with the file 145511383Sbrandon.potter@amd.com // that resides on the host system. So, any write on a real system 145611383Sbrandon.potter@amd.com // would cause the change to be propagated to the file mapping at 145711383Sbrandon.potter@amd.com // some point in the future (the inode is tracked along with the 145811383Sbrandon.potter@amd.com // mapping). This isn't guaranteed to always happen, but it usually 145911383Sbrandon.potter@amd.com // works well enough. The guarantee is provided by the msync system 146011383Sbrandon.potter@amd.com // call. We could force the change through with shared mappings with 146111383Sbrandon.potter@amd.com // a call to msync, but that again would require more information 146211383Sbrandon.potter@amd.com // than we currently maintain. 146311383Sbrandon.potter@amd.com warn("mmap: writing to shared mmap region is currently " 146411383Sbrandon.potter@amd.com "unsupported. The write succeeds on the target, but it " 146511383Sbrandon.potter@amd.com "will not be propagated to the host or shared mappings"); 14668324Ssteve.reinhardt@amd.com } 14675877Shsul@eecs.umich.edu 146810486Stjablin@gmail.com length = roundUp(length, TheISA::PageBytes); 146910486Stjablin@gmail.com 147011383Sbrandon.potter@amd.com int sim_fd = -1; 147111383Sbrandon.potter@amd.com uint8_t *pmap = nullptr; 147211383Sbrandon.potter@amd.com if (!(tgt_flags & OS::TGT_MAP_ANONYMOUS)) { 147311856Sbrandon.potter@amd.com std::shared_ptr<FDEntry> fdep = (*p->fds)[tgt_fd]; 147411624Smichael.lebeane@amd.com 147511856Sbrandon.potter@amd.com auto dfdp = std::dynamic_pointer_cast<DeviceFDEntry>(fdep); 147611856Sbrandon.potter@amd.com if (dfdp) { 147711856Sbrandon.potter@amd.com EmulatedDriver *emul_driver = dfdp->getDriver(); 147811856Sbrandon.potter@amd.com return emul_driver->mmap(p, tc, start, length, prot, 147911624Smichael.lebeane@amd.com tgt_flags, tgt_fd, offset); 148011624Smichael.lebeane@amd.com } 148111624Smichael.lebeane@amd.com 148211856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(fdep); 148311856Sbrandon.potter@amd.com if (!ffdp) 148411383Sbrandon.potter@amd.com return -EBADF; 148511856Sbrandon.potter@amd.com sim_fd = ffdp->getSimFD(); 1486360SN/A 148711383Sbrandon.potter@amd.com pmap = (decltype(pmap))mmap(NULL, length, PROT_READ, MAP_PRIVATE, 148811383Sbrandon.potter@amd.com sim_fd, offset); 14898600Ssteve.reinhardt@amd.com 149011383Sbrandon.potter@amd.com if (pmap == (decltype(pmap))-1) { 149111383Sbrandon.potter@amd.com warn("mmap: failed to map file into host address space"); 149211383Sbrandon.potter@amd.com return -errno; 14938600Ssteve.reinhardt@amd.com } 14942544SN/A } 14952544SN/A 149611383Sbrandon.potter@amd.com // Extend global mmap region if necessary. Note that we ignore the 149711383Sbrandon.potter@amd.com // start address unless MAP_FIXED is specified. 149811383Sbrandon.potter@amd.com if (!(tgt_flags & OS::TGT_MAP_FIXED)) { 149911905SBrandon.Potter@amd.com std::shared_ptr<MemState> mem_state = p->memState; 150011905SBrandon.Potter@amd.com Addr mmap_end = mem_state->getMmapEnd(); 150111905SBrandon.Potter@amd.com 150211905SBrandon.Potter@amd.com start = p->mmapGrowsDown() ? mmap_end - length : mmap_end; 150311905SBrandon.Potter@amd.com mmap_end = p->mmapGrowsDown() ? start : mmap_end + length; 150411905SBrandon.Potter@amd.com 150511905SBrandon.Potter@amd.com mem_state->setMmapEnd(mmap_end); 150611383Sbrandon.potter@amd.com } 150711383Sbrandon.potter@amd.com 150811383Sbrandon.potter@amd.com DPRINTF_SYSCALL(Verbose, " mmap range is 0x%x - 0x%x\n", 150911383Sbrandon.potter@amd.com start, start + length - 1); 151011383Sbrandon.potter@amd.com 151111383Sbrandon.potter@amd.com // We only allow mappings to overwrite existing mappings if 151211383Sbrandon.potter@amd.com // TGT_MAP_FIXED is set. Otherwise it shouldn't be a problem 151311383Sbrandon.potter@amd.com // because we ignore the start hint if TGT_MAP_FIXED is not set. 151411383Sbrandon.potter@amd.com int clobber = tgt_flags & OS::TGT_MAP_FIXED; 151511383Sbrandon.potter@amd.com if (clobber) { 151611383Sbrandon.potter@amd.com for (auto tc : p->system->threadContexts) { 151711383Sbrandon.potter@amd.com // If we might be overwriting old mappings, we need to 151811383Sbrandon.potter@amd.com // invalidate potentially stale mappings out of the TLBs. 151911383Sbrandon.potter@amd.com tc->getDTBPtr()->flushAll(); 152011383Sbrandon.potter@amd.com tc->getITBPtr()->flushAll(); 15218600Ssteve.reinhardt@amd.com } 15226672Sgblack@eecs.umich.edu } 15238600Ssteve.reinhardt@amd.com 152411383Sbrandon.potter@amd.com // Allocate physical memory and map it in. If the page table is already 152511383Sbrandon.potter@amd.com // mapped and clobber is not set, the simulator will issue throw a 152611383Sbrandon.potter@amd.com // fatal and bail out of the simulation. 15278601Ssteve.reinhardt@amd.com p->allocateMem(start, length, clobber); 15282544SN/A 152911383Sbrandon.potter@amd.com // Transfer content into target address space. 153011383Sbrandon.potter@amd.com SETranslatingPortProxy &tp = tc->getMemProxy(); 153111383Sbrandon.potter@amd.com if (tgt_flags & OS::TGT_MAP_ANONYMOUS) { 153211383Sbrandon.potter@amd.com // In general, we should zero the mapped area for anonymous mappings, 153311383Sbrandon.potter@amd.com // with something like: 153411383Sbrandon.potter@amd.com // tp.memsetBlob(start, 0, length); 153511383Sbrandon.potter@amd.com // However, given that we don't support sparse mappings, and 153611383Sbrandon.potter@amd.com // some applications can map a couple of gigabytes of space 153711383Sbrandon.potter@amd.com // (intending sparse usage), that can get painfully expensive. 153811383Sbrandon.potter@amd.com // Fortunately, since we don't properly implement munmap either, 153911383Sbrandon.potter@amd.com // there's no danger of remapping used memory, so for now all 154011383Sbrandon.potter@amd.com // newly mapped memory should already be zeroed so we can skip it. 154111383Sbrandon.potter@amd.com } else { 154211383Sbrandon.potter@amd.com // It is possible to mmap an area larger than a file, however 154311383Sbrandon.potter@amd.com // accessing unmapped portions the system triggers a "Bus error" 154411383Sbrandon.potter@amd.com // on the host. We must know when to stop copying the file from 154511383Sbrandon.potter@amd.com // the host into the target address space. 154611383Sbrandon.potter@amd.com struct stat file_stat; 154711383Sbrandon.potter@amd.com if (fstat(sim_fd, &file_stat) > 0) 154811383Sbrandon.potter@amd.com fatal("mmap: cannot stat file"); 154911383Sbrandon.potter@amd.com 155011383Sbrandon.potter@amd.com // Copy the portion of the file that is resident. This requires 155111383Sbrandon.potter@amd.com // checking both the mmap size and the filesize that we are 155211383Sbrandon.potter@amd.com // trying to mmap into this space; the mmap size also depends 155311383Sbrandon.potter@amd.com // on the specified offset into the file. 155411383Sbrandon.potter@amd.com uint64_t size = std::min((uint64_t)file_stat.st_size - offset, 155511383Sbrandon.potter@amd.com length); 155611383Sbrandon.potter@amd.com tp.writeBlob(start, pmap, size); 155711383Sbrandon.potter@amd.com 155811383Sbrandon.potter@amd.com // Cleanup the mmap region before exiting this function. 155911383Sbrandon.potter@amd.com munmap(pmap, length); 156011383Sbrandon.potter@amd.com 156111392Sbrandon.potter@amd.com // Maintain the symbol table for dynamic executables. 156211392Sbrandon.potter@amd.com // The loader will call mmap to map the images into its address 156311392Sbrandon.potter@amd.com // space and we intercept that here. We can verify that we are 156411392Sbrandon.potter@amd.com // executing inside the loader by checking the program counter value. 156511392Sbrandon.potter@amd.com // XXX: with multiprogrammed workloads or multi-node configurations, 156611392Sbrandon.potter@amd.com // this will not work since there is a single global symbol table. 156711392Sbrandon.potter@amd.com ObjectFile *interpreter = p->getInterpreter(); 156811392Sbrandon.potter@amd.com if (interpreter) { 156911392Sbrandon.potter@amd.com Addr text_start = interpreter->textBase(); 157011392Sbrandon.potter@amd.com Addr text_end = text_start + interpreter->textSize(); 157111392Sbrandon.potter@amd.com 157211392Sbrandon.potter@amd.com Addr pc = tc->pcState().pc(); 157311392Sbrandon.potter@amd.com 157411392Sbrandon.potter@amd.com if (pc >= text_start && pc < text_end) { 157511856Sbrandon.potter@amd.com std::shared_ptr<FDEntry> fdep = (*p->fds)[tgt_fd]; 157611856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(fdep); 157711856Sbrandon.potter@amd.com ObjectFile *lib = createObjectFile(ffdp->getFileName()); 157811392Sbrandon.potter@amd.com 157911392Sbrandon.potter@amd.com if (lib) { 158011392Sbrandon.potter@amd.com lib->loadAllSymbols(debugSymbolTable, 158111392Sbrandon.potter@amd.com lib->textBase(), start); 158211392Sbrandon.potter@amd.com } 158311392Sbrandon.potter@amd.com } 158411392Sbrandon.potter@amd.com } 158511392Sbrandon.potter@amd.com 158611383Sbrandon.potter@amd.com // Note that we do not zero out the remainder of the mapping. This 158711383Sbrandon.potter@amd.com // is done by a real system, but it probably will not affect 158811383Sbrandon.potter@amd.com // execution (hopefully). 158911383Sbrandon.potter@amd.com } 159011383Sbrandon.potter@amd.com 15911458SN/A return start; 1592360SN/A} 1593360SN/A 159411593Santhony.gutierrez@amd.comtemplate <class OS> 159511593Santhony.gutierrez@amd.comSyscallReturn 159611851Sbrandon.potter@amd.compwrite64Func(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 159711593Santhony.gutierrez@amd.com{ 159811593Santhony.gutierrez@amd.com int index = 0; 159911593Santhony.gutierrez@amd.com int tgt_fd = p->getSyscallArg(tc, index); 160011593Santhony.gutierrez@amd.com Addr bufPtr = p->getSyscallArg(tc, index); 160111593Santhony.gutierrez@amd.com int nbytes = p->getSyscallArg(tc, index); 160211593Santhony.gutierrez@amd.com int offset = p->getSyscallArg(tc, index); 160311593Santhony.gutierrez@amd.com 160411856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 160511856Sbrandon.potter@amd.com if (!ffdp) 160611593Santhony.gutierrez@amd.com return -EBADF; 160711856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 160811593Santhony.gutierrez@amd.com 160911593Santhony.gutierrez@amd.com BufferArg bufArg(bufPtr, nbytes); 161011593Santhony.gutierrez@amd.com bufArg.copyIn(tc->getMemProxy()); 161111593Santhony.gutierrez@amd.com 161211594Santhony.gutierrez@amd.com int bytes_written = pwrite(sim_fd, bufArg.bufferPtr(), nbytes, offset); 161311593Santhony.gutierrez@amd.com 161411593Santhony.gutierrez@amd.com return (bytes_written == -1) ? -errno : bytes_written; 161511593Santhony.gutierrez@amd.com} 161611593Santhony.gutierrez@amd.com 161711385Sbrandon.potter@amd.com/// Target mmap() handler. 161811385Sbrandon.potter@amd.comtemplate <class OS> 161911385Sbrandon.potter@amd.comSyscallReturn 162011851Sbrandon.potter@amd.commmapFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 162111385Sbrandon.potter@amd.com{ 162211385Sbrandon.potter@amd.com return mmapImpl<OS>(desc, num, p, tc, false); 162311385Sbrandon.potter@amd.com} 162411385Sbrandon.potter@amd.com 162511385Sbrandon.potter@amd.com/// Target mmap2() handler. 162611385Sbrandon.potter@amd.comtemplate <class OS> 162711385Sbrandon.potter@amd.comSyscallReturn 162811851Sbrandon.potter@amd.commmap2Func(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 162911385Sbrandon.potter@amd.com{ 163011385Sbrandon.potter@amd.com return mmapImpl<OS>(desc, num, p, tc, true); 163111385Sbrandon.potter@amd.com} 163211385Sbrandon.potter@amd.com 1633378SN/A/// Target getrlimit() handler. 1634360SN/Atemplate <class OS> 16351450SN/ASyscallReturn 163611851Sbrandon.potter@amd.comgetrlimitFunc(SyscallDesc *desc, int callnum, Process *process, 163711851Sbrandon.potter@amd.com ThreadContext *tc) 1638360SN/A{ 16396701Sgblack@eecs.umich.edu int index = 0; 16406701Sgblack@eecs.umich.edu unsigned resource = process->getSyscallArg(tc, index); 16416701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::rlimit> rlp(process->getSyscallArg(tc, index)); 1642360SN/A 1643360SN/A switch (resource) { 164411906SBrandon.Potter@amd.com case OS::TGT_RLIMIT_STACK: 164511906SBrandon.Potter@amd.com // max stack size in bytes: make up a number (8MB for now) 164611906SBrandon.Potter@amd.com rlp->rlim_cur = rlp->rlim_max = 8 * 1024 * 1024; 164711906SBrandon.Potter@amd.com rlp->rlim_cur = TheISA::htog(rlp->rlim_cur); 164811906SBrandon.Potter@amd.com rlp->rlim_max = TheISA::htog(rlp->rlim_max); 164911906SBrandon.Potter@amd.com break; 1650360SN/A 165111906SBrandon.Potter@amd.com case OS::TGT_RLIMIT_DATA: 165211906SBrandon.Potter@amd.com // max data segment size in bytes: make up a number 165311906SBrandon.Potter@amd.com rlp->rlim_cur = rlp->rlim_max = 256 * 1024 * 1024; 165411906SBrandon.Potter@amd.com rlp->rlim_cur = TheISA::htog(rlp->rlim_cur); 165511906SBrandon.Potter@amd.com rlp->rlim_max = TheISA::htog(rlp->rlim_max); 165611906SBrandon.Potter@amd.com break; 16575877Shsul@eecs.umich.edu 165811906SBrandon.Potter@amd.com default: 165911906SBrandon.Potter@amd.com warn("getrlimit: unimplemented resource %d", resource); 166011906SBrandon.Potter@amd.com return -EINVAL; 166111906SBrandon.Potter@amd.com break; 1662360SN/A } 1663360SN/A 16648706Sandreas.hansson@arm.com rlp.copyOut(tc->getMemProxy()); 16651458SN/A return 0; 1666360SN/A} 1667360SN/A 166810796Sbrandon.potter@amd.com/// Target clock_gettime() function. 166910796Sbrandon.potter@amd.comtemplate <class OS> 167010796Sbrandon.potter@amd.comSyscallReturn 167111851Sbrandon.potter@amd.comclock_gettimeFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 167210796Sbrandon.potter@amd.com{ 167310796Sbrandon.potter@amd.com int index = 1; 167410796Sbrandon.potter@amd.com //int clk_id = p->getSyscallArg(tc, index); 167510796Sbrandon.potter@amd.com TypedBufferArg<typename OS::timespec> tp(p->getSyscallArg(tc, index)); 167610796Sbrandon.potter@amd.com 167710796Sbrandon.potter@amd.com getElapsedTimeNano(tp->tv_sec, tp->tv_nsec); 167810796Sbrandon.potter@amd.com tp->tv_sec += seconds_since_epoch; 167910796Sbrandon.potter@amd.com tp->tv_sec = TheISA::htog(tp->tv_sec); 168010796Sbrandon.potter@amd.com tp->tv_nsec = TheISA::htog(tp->tv_nsec); 168110796Sbrandon.potter@amd.com 168210796Sbrandon.potter@amd.com tp.copyOut(tc->getMemProxy()); 168310796Sbrandon.potter@amd.com 168410796Sbrandon.potter@amd.com return 0; 168510796Sbrandon.potter@amd.com} 168610796Sbrandon.potter@amd.com 168711337SMichael.Lebeane@amd.com/// Target clock_getres() function. 168811337SMichael.Lebeane@amd.comtemplate <class OS> 168911337SMichael.Lebeane@amd.comSyscallReturn 169011851Sbrandon.potter@amd.comclock_getresFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 169111337SMichael.Lebeane@amd.com{ 169211337SMichael.Lebeane@amd.com int index = 1; 169311337SMichael.Lebeane@amd.com TypedBufferArg<typename OS::timespec> tp(p->getSyscallArg(tc, index)); 169411337SMichael.Lebeane@amd.com 169511337SMichael.Lebeane@amd.com // Set resolution at ns, which is what clock_gettime() returns 169611337SMichael.Lebeane@amd.com tp->tv_sec = 0; 169711337SMichael.Lebeane@amd.com tp->tv_nsec = 1; 169811337SMichael.Lebeane@amd.com 169911337SMichael.Lebeane@amd.com tp.copyOut(tc->getMemProxy()); 170011337SMichael.Lebeane@amd.com 170111337SMichael.Lebeane@amd.com return 0; 170211337SMichael.Lebeane@amd.com} 170311337SMichael.Lebeane@amd.com 1704378SN/A/// Target gettimeofday() handler. 1705360SN/Atemplate <class OS> 17061450SN/ASyscallReturn 170711851Sbrandon.potter@amd.comgettimeofdayFunc(SyscallDesc *desc, int callnum, Process *process, 170811851Sbrandon.potter@amd.com ThreadContext *tc) 1709360SN/A{ 17106701Sgblack@eecs.umich.edu int index = 0; 17116701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::timeval> tp(process->getSyscallArg(tc, index)); 1712360SN/A 171310796Sbrandon.potter@amd.com getElapsedTimeMicro(tp->tv_sec, tp->tv_usec); 1714360SN/A tp->tv_sec += seconds_since_epoch; 17156109Ssanchezd@stanford.edu tp->tv_sec = TheISA::htog(tp->tv_sec); 17166109Ssanchezd@stanford.edu tp->tv_usec = TheISA::htog(tp->tv_usec); 1717360SN/A 17188706Sandreas.hansson@arm.com tp.copyOut(tc->getMemProxy()); 1719360SN/A 17201458SN/A return 0; 1721360SN/A} 1722360SN/A 1723360SN/A 17241999SN/A/// Target utimes() handler. 17251999SN/Atemplate <class OS> 17261999SN/ASyscallReturn 172711851Sbrandon.potter@amd.comutimesFunc(SyscallDesc *desc, int callnum, Process *process, 17282680Sktlim@umich.edu ThreadContext *tc) 17291999SN/A{ 17301999SN/A std::string path; 17311999SN/A 17326701Sgblack@eecs.umich.edu int index = 0; 17338852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 17346701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 17356701Sgblack@eecs.umich.edu return -EFAULT; 17366701Sgblack@eecs.umich.edu } 17371999SN/A 17386701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::timeval [2]> 17396701Sgblack@eecs.umich.edu tp(process->getSyscallArg(tc, index)); 17408706Sandreas.hansson@arm.com tp.copyIn(tc->getMemProxy()); 17411999SN/A 17421999SN/A struct timeval hostTimeval[2]; 174311906SBrandon.Potter@amd.com for (int i = 0; i < 2; ++i) { 17448737Skoansin.tan@gmail.com hostTimeval[i].tv_sec = TheISA::gtoh((*tp)[i].tv_sec); 17458737Skoansin.tan@gmail.com hostTimeval[i].tv_usec = TheISA::gtoh((*tp)[i].tv_usec); 17461999SN/A } 17473669Sbinkertn@umich.edu 17483669Sbinkertn@umich.edu // Adjust path for current working directory 17493669Sbinkertn@umich.edu path = process->fullPath(path); 17503669Sbinkertn@umich.edu 17511999SN/A int result = utimes(path.c_str(), hostTimeval); 17521999SN/A 17531999SN/A if (result < 0) 17541999SN/A return -errno; 17551999SN/A 17561999SN/A return 0; 17571999SN/A} 175811886Sbrandon.potter@amd.com 175911886Sbrandon.potter@amd.comtemplate <class OS> 176011886Sbrandon.potter@amd.comSyscallReturn 176111886Sbrandon.potter@amd.comexecveFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 176211886Sbrandon.potter@amd.com{ 176311886Sbrandon.potter@amd.com desc->setFlags(0); 176411886Sbrandon.potter@amd.com 176511886Sbrandon.potter@amd.com int index = 0; 176611886Sbrandon.potter@amd.com std::string path; 176711886Sbrandon.potter@amd.com SETranslatingPortProxy & mem_proxy = tc->getMemProxy(); 176811886Sbrandon.potter@amd.com if (!mem_proxy.tryReadString(path, p->getSyscallArg(tc, index))) 176911886Sbrandon.potter@amd.com return -EFAULT; 177011886Sbrandon.potter@amd.com 177111886Sbrandon.potter@amd.com if (access(path.c_str(), F_OK) == -1) 177211886Sbrandon.potter@amd.com return -EACCES; 177311886Sbrandon.potter@amd.com 177411886Sbrandon.potter@amd.com auto read_in = [](std::vector<std::string> & vect, 177511886Sbrandon.potter@amd.com SETranslatingPortProxy & mem_proxy, 177611886Sbrandon.potter@amd.com Addr mem_loc) 177711886Sbrandon.potter@amd.com { 177811886Sbrandon.potter@amd.com for (int inc = 0; ; inc++) { 177911886Sbrandon.potter@amd.com BufferArg b((mem_loc + sizeof(Addr) * inc), sizeof(Addr)); 178011886Sbrandon.potter@amd.com b.copyIn(mem_proxy); 178111886Sbrandon.potter@amd.com 178211886Sbrandon.potter@amd.com if (!*(Addr*)b.bufferPtr()) 178311886Sbrandon.potter@amd.com break; 178411886Sbrandon.potter@amd.com 178511886Sbrandon.potter@amd.com vect.push_back(std::string()); 178611886Sbrandon.potter@amd.com mem_proxy.tryReadString(vect[inc], *(Addr*)b.bufferPtr()); 178711886Sbrandon.potter@amd.com } 178811886Sbrandon.potter@amd.com }; 178911886Sbrandon.potter@amd.com 179011886Sbrandon.potter@amd.com /** 179111886Sbrandon.potter@amd.com * Note that ProcessParams is generated by swig and there are no other 179211886Sbrandon.potter@amd.com * examples of how to create anything but this default constructor. The 179311886Sbrandon.potter@amd.com * fields are manually initialized instead of passing parameters to the 179411886Sbrandon.potter@amd.com * constructor. 179511886Sbrandon.potter@amd.com */ 179611886Sbrandon.potter@amd.com ProcessParams *pp = new ProcessParams(); 179711886Sbrandon.potter@amd.com pp->executable = path; 179811886Sbrandon.potter@amd.com Addr argv_mem_loc = p->getSyscallArg(tc, index); 179911886Sbrandon.potter@amd.com read_in(pp->cmd, mem_proxy, argv_mem_loc); 180011886Sbrandon.potter@amd.com Addr envp_mem_loc = p->getSyscallArg(tc, index); 180111886Sbrandon.potter@amd.com read_in(pp->env, mem_proxy, envp_mem_loc); 180211886Sbrandon.potter@amd.com pp->uid = p->uid(); 180311886Sbrandon.potter@amd.com pp->egid = p->egid(); 180411886Sbrandon.potter@amd.com pp->euid = p->euid(); 180511886Sbrandon.potter@amd.com pp->gid = p->gid(); 180611886Sbrandon.potter@amd.com pp->ppid = p->ppid(); 180711886Sbrandon.potter@amd.com pp->pid = p->pid(); 180811886Sbrandon.potter@amd.com pp->input.assign("cin"); 180911886Sbrandon.potter@amd.com pp->output.assign("cout"); 181011886Sbrandon.potter@amd.com pp->errout.assign("cerr"); 181111886Sbrandon.potter@amd.com pp->cwd.assign(p->getcwd()); 181211886Sbrandon.potter@amd.com pp->system = p->system; 181311886Sbrandon.potter@amd.com /** 181411886Sbrandon.potter@amd.com * Prevent process object creation with identical PIDs (which will trip 181511886Sbrandon.potter@amd.com * a fatal check in Process constructor). The execve call is supposed to 181611886Sbrandon.potter@amd.com * take over the currently executing process' identity but replace 181711886Sbrandon.potter@amd.com * whatever it is doing with a new process image. Instead of hijacking 181811886Sbrandon.potter@amd.com * the process object in the simulator, we create a new process object 181911886Sbrandon.potter@amd.com * and bind to the previous process' thread below (hijacking the thread). 182011886Sbrandon.potter@amd.com */ 182111886Sbrandon.potter@amd.com p->system->PIDs.erase(p->pid()); 182211886Sbrandon.potter@amd.com Process *new_p = pp->create(); 182311886Sbrandon.potter@amd.com delete pp; 182411886Sbrandon.potter@amd.com 182511886Sbrandon.potter@amd.com /** 182611886Sbrandon.potter@amd.com * Work through the file descriptor array and close any files marked 182711886Sbrandon.potter@amd.com * close-on-exec. 182811886Sbrandon.potter@amd.com */ 182911886Sbrandon.potter@amd.com new_p->fds = p->fds; 183011886Sbrandon.potter@amd.com for (int i = 0; i < new_p->fds->getSize(); i++) { 183111886Sbrandon.potter@amd.com std::shared_ptr<FDEntry> fdep = (*new_p->fds)[i]; 183211886Sbrandon.potter@amd.com if (fdep && fdep->getCOE()) 183311886Sbrandon.potter@amd.com new_p->fds->closeFDEntry(i); 183411886Sbrandon.potter@amd.com } 183511886Sbrandon.potter@amd.com 183611886Sbrandon.potter@amd.com *new_p->sigchld = true; 183711886Sbrandon.potter@amd.com 183811886Sbrandon.potter@amd.com delete p; 183911886Sbrandon.potter@amd.com tc->clearArchRegs(); 184011886Sbrandon.potter@amd.com tc->setProcessPtr(new_p); 184111886Sbrandon.potter@amd.com new_p->assignThreadContext(tc->contextId()); 184211886Sbrandon.potter@amd.com new_p->initState(); 184311886Sbrandon.potter@amd.com tc->activate(); 184411886Sbrandon.potter@amd.com TheISA::PCState pcState = tc->pcState(); 184511886Sbrandon.potter@amd.com tc->setNPC(pcState.instAddr()); 184611886Sbrandon.potter@amd.com 184711886Sbrandon.potter@amd.com desc->setFlags(SyscallDesc::SuppressReturnValue); 184811886Sbrandon.potter@amd.com return 0; 184911886Sbrandon.potter@amd.com} 185011886Sbrandon.potter@amd.com 1851378SN/A/// Target getrusage() function. 1852360SN/Atemplate <class OS> 18531450SN/ASyscallReturn 185411851Sbrandon.potter@amd.comgetrusageFunc(SyscallDesc *desc, int callnum, Process *process, 18552680Sktlim@umich.edu ThreadContext *tc) 1856360SN/A{ 18576701Sgblack@eecs.umich.edu int index = 0; 18586701Sgblack@eecs.umich.edu int who = process->getSyscallArg(tc, index); // THREAD, SELF, or CHILDREN 18596701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::rusage> rup(process->getSyscallArg(tc, index)); 1860360SN/A 18613670Sbinkertn@umich.edu rup->ru_utime.tv_sec = 0; 18623670Sbinkertn@umich.edu rup->ru_utime.tv_usec = 0; 1863360SN/A rup->ru_stime.tv_sec = 0; 1864360SN/A rup->ru_stime.tv_usec = 0; 1865360SN/A rup->ru_maxrss = 0; 1866360SN/A rup->ru_ixrss = 0; 1867360SN/A rup->ru_idrss = 0; 1868360SN/A rup->ru_isrss = 0; 1869360SN/A rup->ru_minflt = 0; 1870360SN/A rup->ru_majflt = 0; 1871360SN/A rup->ru_nswap = 0; 1872360SN/A rup->ru_inblock = 0; 1873360SN/A rup->ru_oublock = 0; 1874360SN/A rup->ru_msgsnd = 0; 1875360SN/A rup->ru_msgrcv = 0; 1876360SN/A rup->ru_nsignals = 0; 1877360SN/A rup->ru_nvcsw = 0; 1878360SN/A rup->ru_nivcsw = 0; 1879360SN/A 18803670Sbinkertn@umich.edu switch (who) { 18813670Sbinkertn@umich.edu case OS::TGT_RUSAGE_SELF: 188210796Sbrandon.potter@amd.com getElapsedTimeMicro(rup->ru_utime.tv_sec, rup->ru_utime.tv_usec); 18838737Skoansin.tan@gmail.com rup->ru_utime.tv_sec = TheISA::htog(rup->ru_utime.tv_sec); 18848737Skoansin.tan@gmail.com rup->ru_utime.tv_usec = TheISA::htog(rup->ru_utime.tv_usec); 18853670Sbinkertn@umich.edu break; 18863670Sbinkertn@umich.edu 18873670Sbinkertn@umich.edu case OS::TGT_RUSAGE_CHILDREN: 18883670Sbinkertn@umich.edu // do nothing. We have no child processes, so they take no time. 18893670Sbinkertn@umich.edu break; 18903670Sbinkertn@umich.edu 18913670Sbinkertn@umich.edu default: 18923670Sbinkertn@umich.edu // don't really handle THREAD or CHILDREN, but just warn and 18933670Sbinkertn@umich.edu // plow ahead 18943670Sbinkertn@umich.edu warn("getrusage() only supports RUSAGE_SELF. Parameter %d ignored.", 18953670Sbinkertn@umich.edu who); 18963670Sbinkertn@umich.edu } 18973670Sbinkertn@umich.edu 18988706Sandreas.hansson@arm.com rup.copyOut(tc->getMemProxy()); 1899360SN/A 19001458SN/A return 0; 1901360SN/A} 1902360SN/A 19036683Stjones1@inf.ed.ac.uk/// Target times() function. 19046683Stjones1@inf.ed.ac.uktemplate <class OS> 19056683Stjones1@inf.ed.ac.ukSyscallReturn 190611851Sbrandon.potter@amd.comtimesFunc(SyscallDesc *desc, int callnum, Process *process, 190711851Sbrandon.potter@amd.com ThreadContext *tc) 19086683Stjones1@inf.ed.ac.uk{ 19096701Sgblack@eecs.umich.edu int index = 0; 19106701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::tms> bufp(process->getSyscallArg(tc, index)); 19116683Stjones1@inf.ed.ac.uk 19126683Stjones1@inf.ed.ac.uk // Fill in the time structure (in clocks) 19137823Ssteve.reinhardt@amd.com int64_t clocks = curTick() * OS::M5_SC_CLK_TCK / SimClock::Int::s; 19146683Stjones1@inf.ed.ac.uk bufp->tms_utime = clocks; 19156683Stjones1@inf.ed.ac.uk bufp->tms_stime = 0; 19166683Stjones1@inf.ed.ac.uk bufp->tms_cutime = 0; 19176683Stjones1@inf.ed.ac.uk bufp->tms_cstime = 0; 19186683Stjones1@inf.ed.ac.uk 19196683Stjones1@inf.ed.ac.uk // Convert to host endianness 19208737Skoansin.tan@gmail.com bufp->tms_utime = TheISA::htog(bufp->tms_utime); 19216683Stjones1@inf.ed.ac.uk 19226683Stjones1@inf.ed.ac.uk // Write back 19238706Sandreas.hansson@arm.com bufp.copyOut(tc->getMemProxy()); 19246683Stjones1@inf.ed.ac.uk 19256683Stjones1@inf.ed.ac.uk // Return clock ticks since system boot 19266683Stjones1@inf.ed.ac.uk return clocks; 19276683Stjones1@inf.ed.ac.uk} 19282553SN/A 19296684Stjones1@inf.ed.ac.uk/// Target time() function. 19306684Stjones1@inf.ed.ac.uktemplate <class OS> 19316684Stjones1@inf.ed.ac.ukSyscallReturn 193211851Sbrandon.potter@amd.comtimeFunc(SyscallDesc *desc, int callnum, Process *process, ThreadContext *tc) 19336684Stjones1@inf.ed.ac.uk{ 19346684Stjones1@inf.ed.ac.uk typename OS::time_t sec, usec; 193510796Sbrandon.potter@amd.com getElapsedTimeMicro(sec, usec); 19366684Stjones1@inf.ed.ac.uk sec += seconds_since_epoch; 19376684Stjones1@inf.ed.ac.uk 19386701Sgblack@eecs.umich.edu int index = 0; 19396701Sgblack@eecs.umich.edu Addr taddr = (Addr)process->getSyscallArg(tc, index); 194011321Ssteve.reinhardt@amd.com if (taddr != 0) { 19416684Stjones1@inf.ed.ac.uk typename OS::time_t t = sec; 19428737Skoansin.tan@gmail.com t = TheISA::htog(t); 19438852Sandreas.hansson@arm.com SETranslatingPortProxy &p = tc->getMemProxy(); 19448852Sandreas.hansson@arm.com p.writeBlob(taddr, (uint8_t*)&t, (int)sizeof(typename OS::time_t)); 19456684Stjones1@inf.ed.ac.uk } 19466684Stjones1@inf.ed.ac.uk return sec; 19476684Stjones1@inf.ed.ac.uk} 19482553SN/A 194911910SBrandon.Potter@amd.comtemplate <class OS> 195011910SBrandon.Potter@amd.comSyscallReturn 195111910SBrandon.Potter@amd.comtgkillFunc(SyscallDesc *desc, int num, Process *process, ThreadContext *tc) 195211910SBrandon.Potter@amd.com{ 195311910SBrandon.Potter@amd.com int index = 0; 195411910SBrandon.Potter@amd.com int tgid = process->getSyscallArg(tc, index); 195511910SBrandon.Potter@amd.com int tid = process->getSyscallArg(tc, index); 195611910SBrandon.Potter@amd.com int sig = process->getSyscallArg(tc, index); 195711910SBrandon.Potter@amd.com 195811910SBrandon.Potter@amd.com /** 195911910SBrandon.Potter@amd.com * This system call is intended to allow killing a specific thread 196011910SBrandon.Potter@amd.com * within an arbitrary thread group if sanctioned with permission checks. 196111910SBrandon.Potter@amd.com * It's usually true that threads share the termination signal as pointed 196211910SBrandon.Potter@amd.com * out by the pthread_kill man page and this seems to be the intended 196311910SBrandon.Potter@amd.com * usage. Due to this being an emulated environment, assume the following: 196411910SBrandon.Potter@amd.com * Threads are allowed to call tgkill because the EUID for all threads 196511910SBrandon.Potter@amd.com * should be the same. There is no signal handling mechanism for kernel 196611910SBrandon.Potter@amd.com * registration of signal handlers since signals are poorly supported in 196711910SBrandon.Potter@amd.com * emulation mode. Since signal handlers cannot be registered, all 196811910SBrandon.Potter@amd.com * threads within in a thread group must share the termination signal. 196911910SBrandon.Potter@amd.com * We never exhaust PIDs so there's no chance of finding the wrong one 197011910SBrandon.Potter@amd.com * due to PID rollover. 197111910SBrandon.Potter@amd.com */ 197211910SBrandon.Potter@amd.com 197311910SBrandon.Potter@amd.com System *sys = tc->getSystemPtr(); 197411910SBrandon.Potter@amd.com Process *tgt_proc = nullptr; 197511910SBrandon.Potter@amd.com for (int i = 0; i < sys->numContexts(); i++) { 197611910SBrandon.Potter@amd.com Process *temp = sys->threadContexts[i]->getProcessPtr(); 197711910SBrandon.Potter@amd.com if (temp->pid() == tid) { 197811910SBrandon.Potter@amd.com tgt_proc = temp; 197911910SBrandon.Potter@amd.com break; 198011910SBrandon.Potter@amd.com } 198111910SBrandon.Potter@amd.com } 198211910SBrandon.Potter@amd.com 198311910SBrandon.Potter@amd.com if (sig != 0 || sig != OS::TGT_SIGABRT) 198411910SBrandon.Potter@amd.com return -EINVAL; 198511910SBrandon.Potter@amd.com 198611910SBrandon.Potter@amd.com if (tgt_proc == nullptr) 198711910SBrandon.Potter@amd.com return -ESRCH; 198811910SBrandon.Potter@amd.com 198911910SBrandon.Potter@amd.com if (tgid != -1 && tgt_proc->tgid() != tgid) 199011910SBrandon.Potter@amd.com return -ESRCH; 199111910SBrandon.Potter@amd.com 199211910SBrandon.Potter@amd.com if (sig == OS::TGT_SIGABRT) 199311910SBrandon.Potter@amd.com exitGroupFunc(desc, 252, process, tc); 199411910SBrandon.Potter@amd.com 199511910SBrandon.Potter@amd.com return 0; 199611910SBrandon.Potter@amd.com} 199711910SBrandon.Potter@amd.com 19982553SN/A 19991354SN/A#endif // __SIM_SYSCALL_EMUL_HH__ 2000