syscall_emul.hh revision 13031
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 4812018Sandreas.sandberg@arm.com#if (defined(__APPLE__) || defined(__OpenBSD__) || \ 4912018Sandreas.sandberg@arm.com defined(__FreeBSD__) || defined(__CYGWIN__) || \ 5012018Sandreas.sandberg@arm.com defined(__NetBSD__)) 5112018Sandreas.sandberg@arm.com#define NO_STAT64 1 5212018Sandreas.sandberg@arm.com#else 5312018Sandreas.sandberg@arm.com#define NO_STAT64 0 5412018Sandreas.sandberg@arm.com#endif 552064SN/A 5612018Sandreas.sandberg@arm.com#if (defined(__APPLE__) || defined(__OpenBSD__) || \ 5712018Sandreas.sandberg@arm.com defined(__FreeBSD__) || defined(__NetBSD__)) 5812018Sandreas.sandberg@arm.com#define NO_STATFS 1 5912018Sandreas.sandberg@arm.com#else 6012018Sandreas.sandberg@arm.com#define NO_STATFS 0 6112018Sandreas.sandberg@arm.com#endif 6211799Sbrandon.potter@amd.com 6312018Sandreas.sandberg@arm.com#if (defined(__APPLE__) || defined(__OpenBSD__) || \ 6412018Sandreas.sandberg@arm.com defined(__FreeBSD__) || defined(__NetBSD__)) 6512018Sandreas.sandberg@arm.com#define NO_FALLOCATE 1 6612018Sandreas.sandberg@arm.com#else 6712018Sandreas.sandberg@arm.com#define NO_FALLOCATE 0 6812018Sandreas.sandberg@arm.com#endif 6911799Sbrandon.potter@amd.com 70360SN/A/// 71360SN/A/// @file syscall_emul.hh 72360SN/A/// 73360SN/A/// This file defines objects used to emulate syscalls from the target 74360SN/A/// application on the host machine. 75360SN/A 761809SN/A#ifdef __CYGWIN32__ 7711800Sbrandon.potter@amd.com#include <sys/fcntl.h> 7811392Sbrandon.potter@amd.com 791809SN/A#endif 8011392Sbrandon.potter@amd.com#include <fcntl.h> 8111383Sbrandon.potter@amd.com#include <sys/mman.h> 823113Sgblack@eecs.umich.edu#include <sys/stat.h> 8311799Sbrandon.potter@amd.com#if (NO_STATFS == 0) 8411759Sbrandon.potter@amd.com#include <sys/statfs.h> 8511812Sbaz21@cam.ac.uk#else 8611812Sbaz21@cam.ac.uk#include <sys/mount.h> 8711799Sbrandon.potter@amd.com#endif 888229Snate@binkert.org#include <sys/time.h> 898229Snate@binkert.org#include <sys/uio.h> 9011594Santhony.gutierrez@amd.com#include <unistd.h> 917075Snate@binkert.org 928229Snate@binkert.org#include <cerrno> 9311856Sbrandon.potter@amd.com#include <memory> 947075Snate@binkert.org#include <string> 95360SN/A 9612461Sgabeblack@google.com#include "arch/generic/tlb.hh" 9711886Sbrandon.potter@amd.com#include "arch/utility.hh" 9811800Sbrandon.potter@amd.com#include "base/intmath.hh" 9911392Sbrandon.potter@amd.com#include "base/loader/object_file.hh" 10012334Sgabeblack@google.com#include "base/logging.hh" 1011354SN/A#include "base/trace.hh" 1026216Snate@binkert.org#include "base/types.hh" 1036658Snate@binkert.org#include "config/the_isa.hh" 1042474SN/A#include "cpu/base.hh" 1052680Sktlim@umich.edu#include "cpu/thread_context.hh" 1068229Snate@binkert.org#include "mem/page_table.hh" 10711886Sbrandon.potter@amd.com#include "params/Process.hh" 10810496Ssteve.reinhardt@amd.com#include "sim/emul_driver.hh" 10911911SBrandon.Potter@amd.com#include "sim/futex_map.hh" 1108229Snate@binkert.org#include "sim/process.hh" 11111794Sbrandon.potter@amd.com#include "sim/syscall_debug_macros.hh" 11211886Sbrandon.potter@amd.com#include "sim/syscall_desc.hh" 11310497Ssteve.reinhardt@amd.com#include "sim/syscall_emul_buf.hh" 11411794Sbrandon.potter@amd.com#include "sim/syscall_return.hh" 115360SN/A 116360SN/A////////////////////////////////////////////////////////////////////// 117360SN/A// 118360SN/A// The following emulation functions are generic enough that they 119360SN/A// don't need to be recompiled for different emulated OS's. They are 120360SN/A// defined in sim/syscall_emul.cc. 121360SN/A// 122360SN/A////////////////////////////////////////////////////////////////////// 123360SN/A 124360SN/A 125378SN/A/// Handler for unimplemented syscalls that we haven't thought about. 1261706SN/ASyscallReturn unimplementedFunc(SyscallDesc *desc, int num, 12711851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 128378SN/A 129378SN/A/// Handler for unimplemented syscalls that we never intend to 130378SN/A/// implement (signal handling, etc.) and should not affect the correct 131378SN/A/// behavior of the program. Print a warning only if the appropriate 132378SN/A/// trace flag is enabled. Return success to the target program. 1331706SN/ASyscallReturn ignoreFunc(SyscallDesc *desc, int num, 13411851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 135360SN/A 13611760Sbrandon.potter@amd.com// Target fallocateFunc() handler. 13711760Sbrandon.potter@amd.comSyscallReturn fallocateFunc(SyscallDesc *desc, int num, 13811851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 13911760Sbrandon.potter@amd.com 1406109Ssanchezd@stanford.edu/// Target exit() handler: terminate current context. 1411706SN/ASyscallReturn exitFunc(SyscallDesc *desc, int num, 14211851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 143378SN/A 1446109Ssanchezd@stanford.edu/// Target exit_group() handler: terminate simulation. (exit all threads) 1456109Ssanchezd@stanford.eduSyscallReturn exitGroupFunc(SyscallDesc *desc, int num, 14611851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 1476109Ssanchezd@stanford.edu 14811886Sbrandon.potter@amd.com/// Target set_tid_address() handler. 14911886Sbrandon.potter@amd.comSyscallReturn setTidAddressFunc(SyscallDesc *desc, int num, 15011886Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 15111886Sbrandon.potter@amd.com 152378SN/A/// Target getpagesize() handler. 1531706SN/ASyscallReturn getpagesizeFunc(SyscallDesc *desc, int num, 15411851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 155378SN/A 1565748SSteve.Reinhardt@amd.com/// Target brk() handler: set brk address. 1575748SSteve.Reinhardt@amd.comSyscallReturn brkFunc(SyscallDesc *desc, int num, 15811851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 159378SN/A 160378SN/A/// Target close() handler. 1611706SN/ASyscallReturn closeFunc(SyscallDesc *desc, int num, 16211851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 163378SN/A 16411886Sbrandon.potter@amd.com// Target read() handler. 1651706SN/ASyscallReturn readFunc(SyscallDesc *desc, int num, 16611851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 167378SN/A 168378SN/A/// Target write() handler. 1691706SN/ASyscallReturn writeFunc(SyscallDesc *desc, int num, 17011851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 171378SN/A 172378SN/A/// Target lseek() handler. 1731706SN/ASyscallReturn lseekFunc(SyscallDesc *desc, int num, 17411851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 175378SN/A 1764118Sgblack@eecs.umich.edu/// Target _llseek() handler. 1774118Sgblack@eecs.umich.eduSyscallReturn _llseekFunc(SyscallDesc *desc, int num, 17811851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 1794118Sgblack@eecs.umich.edu 180378SN/A/// Target munmap() handler. 1811706SN/ASyscallReturn munmapFunc(SyscallDesc *desc, int num, 18211851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 183378SN/A 184378SN/A/// Target gethostname() handler. 1851706SN/ASyscallReturn gethostnameFunc(SyscallDesc *desc, int num, 18611851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 187360SN/A 1885513SMichael.Adler@intel.com/// Target getcwd() handler. 1895513SMichael.Adler@intel.comSyscallReturn getcwdFunc(SyscallDesc *desc, int num, 19011851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 1915513SMichael.Adler@intel.com 19210203SAli.Saidi@ARM.com/// Target readlink() handler. 19310203SAli.Saidi@ARM.comSyscallReturn readlinkFunc(SyscallDesc *desc, int num, 19411851Sbrandon.potter@amd.com Process *p, ThreadContext *tc, 19510203SAli.Saidi@ARM.com int index = 0); 1965513SMichael.Adler@intel.comSyscallReturn readlinkFunc(SyscallDesc *desc, int num, 19711851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 1985513SMichael.Adler@intel.com 199511SN/A/// Target unlink() handler. 20010633Smichaelupton@gmail.comSyscallReturn unlinkHelper(SyscallDesc *desc, int num, 20111851Sbrandon.potter@amd.com Process *p, ThreadContext *tc, 20210633Smichaelupton@gmail.com int index); 2031706SN/ASyscallReturn unlinkFunc(SyscallDesc *desc, int num, 20411851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 205511SN/A 2065513SMichael.Adler@intel.com/// Target link() handler 2075513SMichael.Adler@intel.comSyscallReturn linkFunc(SyscallDesc *desc, int num, Process *p, 20811851Sbrandon.potter@amd.com ThreadContext *tc); 2095513SMichael.Adler@intel.com 210511SN/A/// Target symlink() handler. 2111706SN/ASyscallReturn symlinkFunc(SyscallDesc *desc, int num, Process *p, 21211851Sbrandon.potter@amd.com ThreadContext *tc); 2131706SN/A 2141706SN/A/// Target mkdir() handler. 2151706SN/ASyscallReturn mkdirFunc(SyscallDesc *desc, int num, 2161706SN/A Process *p, ThreadContext *tc); 21711851Sbrandon.potter@amd.com 2181706SN/A/// Target mknod() handler. 2191706SN/ASyscallReturn mknodFunc(SyscallDesc *desc, int num, 2201706SN/A Process *p, ThreadContext *tc); 2211706SN/A 22211851Sbrandon.potter@amd.com/// Target chdir() handler. 2231706SN/ASyscallReturn chdirFunc(SyscallDesc *desc, int num, 224511SN/A Process *p, ThreadContext *tc); 2256703Svince@csl.cornell.edu 2266703Svince@csl.cornell.edu// Target rmdir() handler. 22711851Sbrandon.potter@amd.comSyscallReturn rmdirFunc(SyscallDesc *desc, int num, 2286703Svince@csl.cornell.edu Process *p, ThreadContext *tc); 2296685Stjones1@inf.ed.ac.uk 2306685Stjones1@inf.ed.ac.uk/// Target rename() handler. 23111851Sbrandon.potter@amd.comSyscallReturn renameFunc(SyscallDesc *desc, int num, 2326685Stjones1@inf.ed.ac.uk Process *p, ThreadContext *tc); 2336685Stjones1@inf.ed.ac.uk 2345513SMichael.Adler@intel.com 2355513SMichael.Adler@intel.com/// Target truncate() handler. 23611851Sbrandon.potter@amd.comSyscallReturn truncateFunc(SyscallDesc *desc, int num, 2375513SMichael.Adler@intel.com Process *p, ThreadContext *tc); 23811885Sbrandon.potter@amd.com 23911885Sbrandon.potter@amd.com 24011885Sbrandon.potter@amd.com/// Target ftruncate() handler. 2415513SMichael.Adler@intel.comSyscallReturn ftruncateFunc(SyscallDesc *desc, int num, 2421999SN/A Process *p, ThreadContext *tc); 2431999SN/A 24411851Sbrandon.potter@amd.com 2451999SN/A/// Target truncate64() handler. 24611885Sbrandon.potter@amd.comSyscallReturn truncate64Func(SyscallDesc *desc, int num, 24711885Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 24811885Sbrandon.potter@amd.com 2491999SN/A/// Target ftruncate64() handler. 2501999SN/ASyscallReturn ftruncate64Func(SyscallDesc *desc, int num, 2511999SN/A Process *p, ThreadContext *tc); 25211851Sbrandon.potter@amd.com 2531999SN/A 2543079Sstever@eecs.umich.edu/// Target umask() handler. 2553079Sstever@eecs.umich.eduSyscallReturn umaskFunc(SyscallDesc *desc, int num, 25611851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2573079Sstever@eecs.umich.edu 25811908SBrandon.Potter@amd.com/// Target gettid() handler. 25911908SBrandon.Potter@amd.comSyscallReturn gettidFunc(SyscallDesc *desc, int num, 26011908SBrandon.Potter@amd.com Process *p, ThreadContext *tc); 26111908SBrandon.Potter@amd.com 26211875Sbrandon.potter@amd.com/// Target chown() handler. 2632093SN/ASyscallReturn chownFunc(SyscallDesc *desc, int num, 26411851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2652093SN/A 2662687Sksewell@umich.edu/// Target setpgid() handler. 2672687Sksewell@umich.eduSyscallReturn setpgidFunc(SyscallDesc *desc, int num, 26811851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2692687Sksewell@umich.edu 2702238SN/A/// Target fchown() handler. 2712238SN/ASyscallReturn fchownFunc(SyscallDesc *desc, int num, 27211851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2732238SN/A 27411908SBrandon.Potter@amd.com/// Target dup() handler. 27511908SBrandon.Potter@amd.comSyscallReturn dupFunc(SyscallDesc *desc, int num, 27611908SBrandon.Potter@amd.com Process *process, ThreadContext *tc); 27711908SBrandon.Potter@amd.com 27811908SBrandon.Potter@amd.com/// Target dup2() handler. 27911908SBrandon.Potter@amd.comSyscallReturn dup2Func(SyscallDesc *desc, int num, 28011908SBrandon.Potter@amd.com Process *process, ThreadContext *tc); 28111908SBrandon.Potter@amd.com 2822238SN/A/// Target fcntl() handler. 2832238SN/ASyscallReturn fcntlFunc(SyscallDesc *desc, int num, 28411851Sbrandon.potter@amd.com Process *process, ThreadContext *tc); 2852238SN/A 2862238SN/A/// Target fcntl64() handler. 2872238SN/ASyscallReturn fcntl64Func(SyscallDesc *desc, int num, 28811851Sbrandon.potter@amd.com Process *process, ThreadContext *tc); 2892238SN/A 2902238SN/A/// Target setuid() handler. 2912238SN/ASyscallReturn setuidFunc(SyscallDesc *desc, int num, 29211851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2932238SN/A 2942238SN/A/// Target pipe() handler. 2952238SN/ASyscallReturn pipeFunc(SyscallDesc *desc, int num, 29611851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2972238SN/A 2982238SN/A/// Internal pipe() handler. 2992238SN/ASyscallReturn pipeImpl(SyscallDesc *desc, int num, Process *p, 30011851Sbrandon.potter@amd.com ThreadContext *tc, bool pseudoPipe); 3012238SN/A 3022238SN/A/// Target getpid() handler. 3032238SN/ASyscallReturn getpidFunc(SyscallDesc *desc, int num, 30411851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3052238SN/A 3069455Smitch.hayenga+gem5@gmail.com// Target getdents() handler. 3079455Smitch.hayenga+gem5@gmail.comSyscallReturn getdentsFunc(SyscallDesc *desc, int num, 30811851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 30910203SAli.Saidi@ARM.com 31011851Sbrandon.potter@amd.com// Target getuid() handler. 31111851Sbrandon.potter@amd.comSyscallReturn getuidFunc(SyscallDesc *desc, int num, 3129455Smitch.hayenga+gem5@gmail.com Process *p, ThreadContext *tc); 3139112Smarc.orr@gmail.com 31411906SBrandon.Potter@amd.com/// Target getgid() handler. 31511906SBrandon.Potter@amd.comSyscallReturn getgidFunc(SyscallDesc *desc, int num, 3169112Smarc.orr@gmail.com Process *p, ThreadContext *tc); 3179112Smarc.orr@gmail.com 31811851Sbrandon.potter@amd.com/// Target getppid() handler. 3199112Smarc.orr@gmail.comSyscallReturn getppidFunc(SyscallDesc *desc, int num, 3209112Smarc.orr@gmail.com Process *p, ThreadContext *tc); 32111911SBrandon.Potter@amd.com 3229112Smarc.orr@gmail.com/// Target geteuid() handler. 32311911SBrandon.Potter@amd.comSyscallReturn geteuidFunc(SyscallDesc *desc, int num, 32411911SBrandon.Potter@amd.com Process *p, ThreadContext *tc); 32511911SBrandon.Potter@amd.com 32611911SBrandon.Potter@amd.com/// Target getegid() handler. 3279112Smarc.orr@gmail.comSyscallReturn getegidFunc(SyscallDesc *desc, int num, 32811911SBrandon.Potter@amd.com Process *p, ThreadContext *tc); 32911911SBrandon.Potter@amd.com 33011911SBrandon.Potter@amd.com/// Target access() handler 33111911SBrandon.Potter@amd.comSyscallReturn accessFunc(SyscallDesc *desc, int num, 3329238Slluc.alvarez@bsc.es Process *p, ThreadContext *tc); 3339112Smarc.orr@gmail.comSyscallReturn accessFunc(SyscallDesc *desc, int num, 33411911SBrandon.Potter@amd.com Process *p, ThreadContext *tc, 3359112Smarc.orr@gmail.com int index); 33611911SBrandon.Potter@amd.com 33711911SBrandon.Potter@amd.com/// Futex system call 33811911SBrandon.Potter@amd.com/// Implemented by Daniel Sanchez 33911911SBrandon.Potter@amd.com/// Used by printf's in multi-threaded apps 34011911SBrandon.Potter@amd.comtemplate <class OS> 3419112Smarc.orr@gmail.comSyscallReturn 34211911SBrandon.Potter@amd.comfutexFunc(SyscallDesc *desc, int callnum, Process *process, 34311911SBrandon.Potter@amd.com ThreadContext *tc) 34411911SBrandon.Potter@amd.com{ 34511911SBrandon.Potter@amd.com using namespace std; 34611911SBrandon.Potter@amd.com 34711911SBrandon.Potter@amd.com int index = 0; 3489112Smarc.orr@gmail.com Addr uaddr = process->getSyscallArg(tc, index); 3499112Smarc.orr@gmail.com int op = process->getSyscallArg(tc, index); 35011911SBrandon.Potter@amd.com int val = process->getSyscallArg(tc, index); 35111911SBrandon.Potter@amd.com 3529112Smarc.orr@gmail.com /* 35311911SBrandon.Potter@amd.com * Unsupported option that does not affect the correctness of the 35411911SBrandon.Potter@amd.com * application. This is a performance optimization utilized by Linux. 3559112Smarc.orr@gmail.com */ 3569112Smarc.orr@gmail.com op &= ~OS::TGT_FUTEX_PRIVATE_FLAG; 35711911SBrandon.Potter@amd.com 35811911SBrandon.Potter@amd.com FutexMap &futex_map = tc->getSystemPtr()->futexMap; 3599112Smarc.orr@gmail.com 3609112Smarc.orr@gmail.com if (OS::TGT_FUTEX_WAIT == op) { 3612238SN/A // Ensure futex system call accessed atomically. 3622238SN/A BufferArg buf(uaddr, sizeof(int)); 3632238SN/A buf.copyIn(tc->getMemProxy()); 3642238SN/A int mem_val = *(int*)buf.bufferPtr(); 36511851Sbrandon.potter@amd.com 3662238SN/A /* 3672238SN/A * The value in memory at uaddr is not equal with the expected val 3682238SN/A * (a different thread must have changed it before the system call was 36911851Sbrandon.potter@amd.com * invoked). In this case, we need to throw an error. 3702238SN/A */ 3712238SN/A if (val != mem_val) 3722238SN/A return -OS::TGT_EWOULDBLOCK; 37311851Sbrandon.potter@amd.com 3742238SN/A futex_map.suspend(uaddr, process->tgid(), tc); 3752238SN/A 3762238SN/A return 0; 37711851Sbrandon.potter@amd.com } else if (OS::TGT_FUTEX_WAKE == op) { 3782238SN/A return futex_map.wakeup(uaddr, process->tgid(), val); 3792238SN/A } 3801354SN/A 3811354SN/A warn("futex: op %d not implemented; ignoring.", op); 38210796Sbrandon.potter@amd.com return -ENOSYS; 38310796Sbrandon.potter@amd.com} 3841354SN/A 3851354SN/A 3861354SN/A/// Pseudo Funcs - These functions use a different return convension, 3871354SN/A/// returning a second value in a register other than the normal return register 3881354SN/ASyscallReturn pipePseudoFunc(SyscallDesc *desc, int num, 3891354SN/A Process *process, ThreadContext *tc); 3901354SN/A 3911354SN/A/// Target getpidPseudo() handler. 3921354SN/ASyscallReturn getpidPseudoFunc(SyscallDesc *desc, int num, 3931354SN/A Process *p, ThreadContext *tc); 39410796Sbrandon.potter@amd.com 3951354SN/A/// Target getuidPseudo() handler. 39610796Sbrandon.potter@amd.comSyscallReturn getuidPseudoFunc(SyscallDesc *desc, int num, 3971354SN/A Process *p, ThreadContext *tc); 3981354SN/A 3991354SN/A/// Target getgidPseudo() handler. 4001354SN/ASyscallReturn getgidPseudoFunc(SyscallDesc *desc, int num, 40110796Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 40210796Sbrandon.potter@amd.com 40310796Sbrandon.potter@amd.com 40410796Sbrandon.potter@amd.com/// A readable name for 1,000,000, for converting microseconds to seconds. 40510796Sbrandon.potter@amd.comconst int one_million = 1000000; 40610796Sbrandon.potter@amd.com/// A readable name for 1,000,000,000, for converting nanoseconds to seconds. 40710796Sbrandon.potter@amd.comconst int one_billion = 1000000000; 40810796Sbrandon.potter@amd.com 40910796Sbrandon.potter@amd.com/// Approximate seconds since the epoch (1/1/1970). About a billion, 41010796Sbrandon.potter@amd.com/// by my reckoning. We want to keep this a constant (not use the 41110796Sbrandon.potter@amd.com/// real-world time) to keep simulations repeatable. 412360SN/Aconst unsigned seconds_since_epoch = 1000000000; 413360SN/A 414360SN/A/// Helper function to convert current elapsed time to seconds and 415360SN/A/// microseconds. 416360SN/Atemplate <class T1, class T2> 417360SN/Avoid 418360SN/AgetElapsedTimeMicro(T1 &sec, T2 &usec) 41911759Sbrandon.potter@amd.com{ 4203113Sgblack@eecs.umich.edu uint64_t elapsed_usecs = curTick() / SimClock::Int::us; 4213113Sgblack@eecs.umich.edu sec = elapsed_usecs / one_million; 4223113Sgblack@eecs.umich.edu usec = elapsed_usecs % one_million; 4233113Sgblack@eecs.umich.edu} 4243113Sgblack@eecs.umich.edu 4253113Sgblack@eecs.umich.edu/// Helper function to convert current elapsed time to seconds and 4263113Sgblack@eecs.umich.edu/// nanoseconds. 4273113Sgblack@eecs.umich.edutemplate <class T1, class T2> 4283113Sgblack@eecs.umich.eduvoid 4293113Sgblack@eecs.umich.edugetElapsedTimeNano(T1 &sec, T2 &nsec) 4303113Sgblack@eecs.umich.edu{ 4313113Sgblack@eecs.umich.edu uint64_t elapsed_nsecs = curTick() / SimClock::Int::ns; 4323113Sgblack@eecs.umich.edu sec = elapsed_nsecs / one_billion; 43312032Sandreas.sandberg@arm.com nsec = elapsed_nsecs % one_billion; 4343113Sgblack@eecs.umich.edu} 4353113Sgblack@eecs.umich.edu 4364189Sgblack@eecs.umich.edu////////////////////////////////////////////////////////////////////// 4374189Sgblack@eecs.umich.edu// 4383113Sgblack@eecs.umich.edu// The following emulation functions are generic, but need to be 4393113Sgblack@eecs.umich.edu// templated to account for differences in types, constants, etc. 4403113Sgblack@eecs.umich.edu// 4413113Sgblack@eecs.umich.edu////////////////////////////////////////////////////////////////////// 4428737Skoansin.tan@gmail.com 4433113Sgblack@eecs.umich.edu typedef struct statfs hst_statfs; 4448737Skoansin.tan@gmail.com#if NO_STAT64 4453277Sgblack@eecs.umich.edu typedef struct stat hst_stat; 4465515SMichael.Adler@intel.com typedef struct stat hst_stat64; 4475515SMichael.Adler@intel.com#else 4485515SMichael.Adler@intel.com typedef struct stat hst_stat; 4495515SMichael.Adler@intel.com typedef struct stat64 hst_stat64; 4505515SMichael.Adler@intel.com#endif 4518737Skoansin.tan@gmail.com 4523277Sgblack@eecs.umich.edu//// Helper function to convert a host stat buffer to a target stat 4538737Skoansin.tan@gmail.com//// buffer. Also copies the target buffer out to the simulated 4543277Sgblack@eecs.umich.edu//// memory space. Used by stat(), fstat(), and lstat(). 4558737Skoansin.tan@gmail.com 4563277Sgblack@eecs.umich.edutemplate <typename target_stat, typename host_stat> 4578737Skoansin.tan@gmail.comvoid 4583113Sgblack@eecs.umich.educonvertStatBuf(target_stat &tgt, host_stat *host, bool fakeTTY = false) 4593113Sgblack@eecs.umich.edu{ 4603113Sgblack@eecs.umich.edu using namespace TheISA; 4613113Sgblack@eecs.umich.edu 4628737Skoansin.tan@gmail.com if (fakeTTY) 4633113Sgblack@eecs.umich.edu tgt->st_dev = 0xA; 4648737Skoansin.tan@gmail.com else 4653114Sgblack@eecs.umich.edu tgt->st_dev = host->st_dev; 4668737Skoansin.tan@gmail.com tgt->st_dev = TheISA::htog(tgt->st_dev); 4673114Sgblack@eecs.umich.edu tgt->st_ino = host->st_ino; 4688737Skoansin.tan@gmail.com tgt->st_ino = TheISA::htog(tgt->st_ino); 4693114Sgblack@eecs.umich.edu tgt->st_mode = host->st_mode; 4708737Skoansin.tan@gmail.com if (fakeTTY) { 47111906SBrandon.Potter@amd.com // Claim to be a character device 4724061Sgblack@eecs.umich.edu tgt->st_mode &= ~S_IFMT; // Clear S_IFMT 4734061Sgblack@eecs.umich.edu tgt->st_mode |= S_IFCHR; // Set S_IFCHR 4748737Skoansin.tan@gmail.com } 4753113Sgblack@eecs.umich.edu tgt->st_mode = TheISA::htog(tgt->st_mode); 4768737Skoansin.tan@gmail.com tgt->st_nlink = host->st_nlink; 4773113Sgblack@eecs.umich.edu tgt->st_nlink = TheISA::htog(tgt->st_nlink); 4783113Sgblack@eecs.umich.edu tgt->st_uid = host->st_uid; 4793113Sgblack@eecs.umich.edu tgt->st_uid = TheISA::htog(tgt->st_uid); 4803113Sgblack@eecs.umich.edu tgt->st_gid = host->st_gid; 4813113Sgblack@eecs.umich.edu tgt->st_gid = TheISA::htog(tgt->st_gid); 48212032Sandreas.sandberg@arm.com if (fakeTTY) 4833113Sgblack@eecs.umich.edu tgt->st_rdev = 0x880d; 4843113Sgblack@eecs.umich.edu else 4854189Sgblack@eecs.umich.edu tgt->st_rdev = host->st_rdev; 4864189Sgblack@eecs.umich.edu tgt->st_rdev = TheISA::htog(tgt->st_rdev); 4873113Sgblack@eecs.umich.edu tgt->st_size = host->st_size; 4883113Sgblack@eecs.umich.edu tgt->st_size = TheISA::htog(tgt->st_size); 4893113Sgblack@eecs.umich.edu tgt->st_atimeX = host->st_atime; 4908737Skoansin.tan@gmail.com tgt->st_atimeX = TheISA::htog(tgt->st_atimeX); 4913113Sgblack@eecs.umich.edu tgt->st_mtimeX = host->st_mtime; 4928737Skoansin.tan@gmail.com tgt->st_mtimeX = TheISA::htog(tgt->st_mtimeX); 4933113Sgblack@eecs.umich.edu tgt->st_ctimeX = host->st_ctime; 4948737Skoansin.tan@gmail.com tgt->st_ctimeX = TheISA::htog(tgt->st_ctimeX); 4953113Sgblack@eecs.umich.edu // Force the block size to be 8KB. This helps to ensure buffered io works 4963113Sgblack@eecs.umich.edu // consistently across different hosts. 4973113Sgblack@eecs.umich.edu tgt->st_blksize = 0x2000; 4983113Sgblack@eecs.umich.edu tgt->st_blksize = TheISA::htog(tgt->st_blksize); 4993113Sgblack@eecs.umich.edu tgt->st_blocks = host->st_blocks; 5003113Sgblack@eecs.umich.edu tgt->st_blocks = TheISA::htog(tgt->st_blocks); 5013113Sgblack@eecs.umich.edu} 50211906SBrandon.Potter@amd.com 5033113Sgblack@eecs.umich.edu// Same for stat64 50412032Sandreas.sandberg@arm.com 5058852Sandreas.hansson@arm.comtemplate <typename target_stat, typename host_stat64> 50611906SBrandon.Potter@amd.comvoid 5073113Sgblack@eecs.umich.educonvertStat64Buf(target_stat &tgt, host_stat64 *host, bool fakeTTY = false) 5083113Sgblack@eecs.umich.edu{ 5093113Sgblack@eecs.umich.edu using namespace TheISA; 5103113Sgblack@eecs.umich.edu 5113113Sgblack@eecs.umich.edu convertStatBuf<target_stat, host_stat64>(tgt, host, fakeTTY); 5123113Sgblack@eecs.umich.edu#if defined(STAT_HAVE_NSEC) 5133113Sgblack@eecs.umich.edu tgt->st_atime_nsec = host->st_atime_nsec; 5143113Sgblack@eecs.umich.edu tgt->st_atime_nsec = TheISA::htog(tgt->st_atime_nsec); 51512032Sandreas.sandberg@arm.com tgt->st_mtime_nsec = host->st_mtime_nsec; 5168852Sandreas.hansson@arm.com tgt->st_mtime_nsec = TheISA::htog(tgt->st_mtime_nsec); 51711906SBrandon.Potter@amd.com tgt->st_ctime_nsec = host->st_ctime_nsec; 5183113Sgblack@eecs.umich.edu tgt->st_ctime_nsec = TheISA::htog(tgt->st_ctime_nsec); 5193113Sgblack@eecs.umich.edu#else 5203113Sgblack@eecs.umich.edu tgt->st_atime_nsec = 0; 5216686Stjones1@inf.ed.ac.uk tgt->st_mtime_nsec = 0; 5223113Sgblack@eecs.umich.edu tgt->st_ctime_nsec = 0; 5233113Sgblack@eecs.umich.edu#endif 5243113Sgblack@eecs.umich.edu} 52511759Sbrandon.potter@amd.com 52612032Sandreas.sandberg@arm.com// Here are a couple of convenience functions 52711759Sbrandon.potter@amd.comtemplate<class OS> 52811759Sbrandon.potter@amd.comvoid 52911759Sbrandon.potter@amd.comcopyOutStatBuf(SETranslatingPortProxy &mem, Addr addr, 53011759Sbrandon.potter@amd.com hst_stat *host, bool fakeTTY = false) 53111759Sbrandon.potter@amd.com{ 53211812Sbaz21@cam.ac.uk typedef TypedBufferArg<typename OS::tgt_stat> tgt_stat_buf; 53311812Sbaz21@cam.ac.uk tgt_stat_buf tgt(addr); 53411812Sbaz21@cam.ac.uk convertStatBuf<tgt_stat_buf, hst_stat>(tgt, host, fakeTTY); 53511759Sbrandon.potter@amd.com tgt.copyOut(mem); 53611812Sbaz21@cam.ac.uk} 53711759Sbrandon.potter@amd.com 53811759Sbrandon.potter@amd.comtemplate<class OS> 53911759Sbrandon.potter@amd.comvoid 54011759Sbrandon.potter@amd.comcopyOutStat64Buf(SETranslatingPortProxy &mem, Addr addr, 54111759Sbrandon.potter@amd.com hst_stat64 *host, bool fakeTTY = false) 54211759Sbrandon.potter@amd.com{ 54311759Sbrandon.potter@amd.com typedef TypedBufferArg<typename OS::tgt_stat64> tgt_stat_buf; 54411812Sbaz21@cam.ac.uk tgt_stat_buf tgt(addr); 54511812Sbaz21@cam.ac.uk convertStat64Buf<tgt_stat_buf, hst_stat64>(tgt, host, fakeTTY); 54611812Sbaz21@cam.ac.uk tgt.copyOut(mem); 54711812Sbaz21@cam.ac.uk} 54811812Sbaz21@cam.ac.uk 54911812Sbaz21@cam.ac.uktemplate <class OS> 55011812Sbaz21@cam.ac.ukvoid 55111759Sbrandon.potter@amd.comcopyOutStatfsBuf(SETranslatingPortProxy &mem, Addr addr, 55211759Sbrandon.potter@amd.com hst_statfs *host) 55311812Sbaz21@cam.ac.uk{ 55411812Sbaz21@cam.ac.uk TypedBufferArg<typename OS::tgt_statfs> tgt(addr); 55511759Sbrandon.potter@amd.com 55611812Sbaz21@cam.ac.uk tgt->f_type = TheISA::htog(host->f_type); 55711812Sbaz21@cam.ac.uk#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) 55811812Sbaz21@cam.ac.uk tgt->f_bsize = TheISA::htog(host->f_iosize); 55911812Sbaz21@cam.ac.uk#else 56011812Sbaz21@cam.ac.uk tgt->f_bsize = TheISA::htog(host->f_bsize); 56111812Sbaz21@cam.ac.uk#endif 56211812Sbaz21@cam.ac.uk tgt->f_blocks = TheISA::htog(host->f_blocks); 56311759Sbrandon.potter@amd.com tgt->f_bfree = TheISA::htog(host->f_bfree); 56411759Sbrandon.potter@amd.com tgt->f_bavail = TheISA::htog(host->f_bavail); 56511759Sbrandon.potter@amd.com tgt->f_files = TheISA::htog(host->f_files); 56611759Sbrandon.potter@amd.com tgt->f_ffree = TheISA::htog(host->f_ffree); 567378SN/A memcpy(&tgt->f_fsid, &host->f_fsid, sizeof(host->f_fsid)); 568378SN/A#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) 5699141Smarc.orr@gmail.com tgt->f_namelen = TheISA::htog(host->f_namemax); 5709141Smarc.orr@gmail.com tgt->f_frsize = TheISA::htog(host->f_bsize); 571360SN/A#elif defined(__APPLE__) 5721450SN/A tgt->f_namelen = 0; 57311856Sbrandon.potter@amd.com tgt->f_frsize = 0; 574360SN/A#else 5756701Sgblack@eecs.umich.edu tgt->f_namelen = TheISA::htog(host->f_namelen); 57611856Sbrandon.potter@amd.com tgt->f_frsize = TheISA::htog(host->f_frsize); 57711856Sbrandon.potter@amd.com#endif 578360SN/A#if defined(__linux__) 57910930Sbrandon.potter@amd.com memcpy(&tgt->f_spare, &host->f_spare, sizeof(host->f_spare)); 580360SN/A#else 58111856Sbrandon.potter@amd.com /* 58211856Sbrandon.potter@amd.com * The fields are different sizes per OS. Don't bother with 58310496Ssteve.reinhardt@amd.com * f_spare or f_reserved on non-Linux for now. 58411856Sbrandon.potter@amd.com */ 58511856Sbrandon.potter@amd.com memset(&tgt->f_spare, 0, sizeof(tgt->f_spare)); 5861458SN/A#endif 587360SN/A 58811856Sbrandon.potter@amd.com tgt.copyOut(mem); 58911856Sbrandon.potter@amd.com} 59011856Sbrandon.potter@amd.com 59111856Sbrandon.potter@amd.com/// Target ioctl() handler. For the most part, programs call ioctl() 59211856Sbrandon.potter@amd.com/// only to find out if their stdout is a tty, to determine whether to 59311856Sbrandon.potter@amd.com/// do line or block buffering. We always claim that output fds are 59411856Sbrandon.potter@amd.com/// not TTYs to provide repeatable results. 59511856Sbrandon.potter@amd.comtemplate <class OS> 59610496Ssteve.reinhardt@amd.comSyscallReturn 59711856Sbrandon.potter@amd.comioctlFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 59811856Sbrandon.potter@amd.com{ 59911856Sbrandon.potter@amd.com int index = 0; 60011856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 60111856Sbrandon.potter@amd.com unsigned req = p->getSyscallArg(tc, index); 60210930Sbrandon.potter@amd.com 6039141Smarc.orr@gmail.com DPRINTF(SyscallVerbose, "ioctl(%d, 0x%x, ...)\n", tgt_fd, req); 604360SN/A 605360SN/A if (OS::isTtyReq(req)) 606360SN/A return -ENOTTY; 60711907SBrandon.Potter@amd.com 60811907SBrandon.Potter@amd.com auto dfdp = std::dynamic_pointer_cast<DeviceFDEntry>((*p->fds)[tgt_fd]); 60911907SBrandon.Potter@amd.com if (!dfdp) 610360SN/A return -EBADF; 61111907SBrandon.Potter@amd.com 61211907SBrandon.Potter@amd.com /** 61311907SBrandon.Potter@amd.com * If the driver is valid, issue the ioctl through it. Otherwise, 61411907SBrandon.Potter@amd.com * there's an implicit assumption that the device is a TTY type and we 61511907SBrandon.Potter@amd.com * return that we do not have a valid TTY. 61611907SBrandon.Potter@amd.com */ 61711907SBrandon.Potter@amd.com EmulatedDriver *emul_driver = dfdp->getDriver(); 61811907SBrandon.Potter@amd.com if (emul_driver) 61911907SBrandon.Potter@amd.com return emul_driver->ioctl(p, tc, req); 62011907SBrandon.Potter@amd.com 62111907SBrandon.Potter@amd.com /** 62211907SBrandon.Potter@amd.com * For lack of a better return code, return ENOTTY. Ideally, we should 62311907SBrandon.Potter@amd.com * return something better here, but at least we issue the warning. 62411907SBrandon.Potter@amd.com */ 625360SN/A warn("Unsupported ioctl call (return ENOTTY): ioctl(%d, 0x%x, ...) @ \n", 62611907SBrandon.Potter@amd.com tgt_fd, req, tc->pcState()); 6271458SN/A return -ENOTTY; 628360SN/A} 62911907SBrandon.Potter@amd.com 63011907SBrandon.Potter@amd.comtemplate <class OS> 63111907SBrandon.Potter@amd.comSyscallReturn 63211907SBrandon.Potter@amd.comopenImpl(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc, 63311907SBrandon.Potter@amd.com bool isopenat) 63411907SBrandon.Potter@amd.com{ 63511907SBrandon.Potter@amd.com int index = 0; 63611907SBrandon.Potter@amd.com int tgt_dirfd = -1; 63711907SBrandon.Potter@amd.com 63811907SBrandon.Potter@amd.com /** 639360SN/A * If using the openat variant, read in the target directory file 64011907SBrandon.Potter@amd.com * descriptor from the simulated process. 64111907SBrandon.Potter@amd.com */ 64211907SBrandon.Potter@amd.com if (isopenat) 643360SN/A tgt_dirfd = p->getSyscallArg(tc, index); 644360SN/A 64511907SBrandon.Potter@amd.com /** 64611907SBrandon.Potter@amd.com * Retrieve the simulated process' memory proxy and then read in the path 64711907SBrandon.Potter@amd.com * string from that memory space into the host's working memory space. 64811907SBrandon.Potter@amd.com */ 649360SN/A std::string path; 65011907SBrandon.Potter@amd.com if (!tc->getMemProxy().tryReadString(path, p->getSyscallArg(tc, index))) 651360SN/A return -EFAULT; 652360SN/A 65311907SBrandon.Potter@amd.com#ifdef __CYGWIN32__ 6543669Sbinkertn@umich.edu int host_flags = O_BINARY; 65511907SBrandon.Potter@amd.com#else 65611907SBrandon.Potter@amd.com int host_flags = 0; 65711907SBrandon.Potter@amd.com#endif 65811907SBrandon.Potter@amd.com /** 65911907SBrandon.Potter@amd.com * Translate target flags into host flags. Flags exist which are not 66011907SBrandon.Potter@amd.com * ported between architectures which can cause check failures. 66111907SBrandon.Potter@amd.com */ 66211907SBrandon.Potter@amd.com int tgt_flags = p->getSyscallArg(tc, index); 66311907SBrandon.Potter@amd.com for (int i = 0; i < OS::NUM_OPEN_FLAGS; i++) { 66411907SBrandon.Potter@amd.com if (tgt_flags & OS::openFlagTable[i].tgtFlag) { 66511907SBrandon.Potter@amd.com tgt_flags &= ~OS::openFlagTable[i].tgtFlag; 66611907SBrandon.Potter@amd.com host_flags |= OS::openFlagTable[i].hostFlag; 66711907SBrandon.Potter@amd.com } 66811907SBrandon.Potter@amd.com } 66911907SBrandon.Potter@amd.com if (tgt_flags) { 67011907SBrandon.Potter@amd.com warn("open%s: cannot decode flags 0x%x", 67111907SBrandon.Potter@amd.com isopenat ? "at" : "", tgt_flags); 67211907SBrandon.Potter@amd.com } 67311907SBrandon.Potter@amd.com#ifdef __CYGWIN32__ 67411907SBrandon.Potter@amd.com host_flags |= O_BINARY; 67511907SBrandon.Potter@amd.com#endif 6761706SN/A 67711907SBrandon.Potter@amd.com int mode = p->getSyscallArg(tc, index); 67811907SBrandon.Potter@amd.com 67911907SBrandon.Potter@amd.com /** 68011907SBrandon.Potter@amd.com * If the simulated process called open or openat with AT_FDCWD specified, 68111907SBrandon.Potter@amd.com * take the current working directory value which was passed into the 68211907SBrandon.Potter@amd.com * process class as a Python parameter and append the current path to 68310496Ssteve.reinhardt@amd.com * create a full path. 68410496Ssteve.reinhardt@amd.com * Otherwise, openat with a valid target directory file descriptor has 68511907SBrandon.Potter@amd.com * been called. If the path option, which was passed in as a parameter, 68611907SBrandon.Potter@amd.com * is not absolute, retrieve the directory file descriptor's path and 68711907SBrandon.Potter@amd.com * prepend it to the path passed in as a parameter. 68811907SBrandon.Potter@amd.com * In every case, we should have a full path (which is relevant to the 68911907SBrandon.Potter@amd.com * host) to work with after this block has been passed. 69011907SBrandon.Potter@amd.com */ 69110496Ssteve.reinhardt@amd.com if (!isopenat || (isopenat && tgt_dirfd == OS::TGT_AT_FDCWD)) { 69211907SBrandon.Potter@amd.com path = p->fullPath(path); 69311907SBrandon.Potter@amd.com } else if (!startswith(path, "/")) { 69411907SBrandon.Potter@amd.com std::shared_ptr<FDEntry> fdep = ((*p->fds)[tgt_dirfd]); 69511907SBrandon.Potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(fdep); 69610496Ssteve.reinhardt@amd.com if (!ffdp) 69710496Ssteve.reinhardt@amd.com return -EBADF; 69811907SBrandon.Potter@amd.com path.insert(0, ffdp->getFileName()); 69911907SBrandon.Potter@amd.com } 70011907SBrandon.Potter@amd.com 70111907SBrandon.Potter@amd.com /** 70211907SBrandon.Potter@amd.com * Since this is an emulated environment, we create pseudo file 70311907SBrandon.Potter@amd.com * descriptors for device requests that have been registered with 70411907SBrandon.Potter@amd.com * the process class through Python; this allows us to create a file 70511907SBrandon.Potter@amd.com * descriptor for subsequent ioctl or mmap calls. 70611907SBrandon.Potter@amd.com */ 70711907SBrandon.Potter@amd.com if (startswith(path, "/dev/")) { 70811907SBrandon.Potter@amd.com std::string filename = path.substr(strlen("/dev/")); 70911907SBrandon.Potter@amd.com EmulatedDriver *drv = p->findDriver(filename); 71011907SBrandon.Potter@amd.com if (drv) { 71111907SBrandon.Potter@amd.com DPRINTF_SYSCALL(Verbose, "open%s: passing call to " 71211907SBrandon.Potter@amd.com "driver open with path[%s]\n", 71311907SBrandon.Potter@amd.com isopenat ? "at" : "", path.c_str()); 71411907SBrandon.Potter@amd.com return drv->open(p, tc, mode, host_flags); 71511907SBrandon.Potter@amd.com } 71611907SBrandon.Potter@amd.com /** 71711907SBrandon.Potter@amd.com * Fall through here for pass through to host devices, such 71811907SBrandon.Potter@amd.com * as /dev/zero 71911907SBrandon.Potter@amd.com */ 72011907SBrandon.Potter@amd.com } 72111907SBrandon.Potter@amd.com 72211907SBrandon.Potter@amd.com /** 723360SN/A * Some special paths and files cannot be called on the host and need 72411907SBrandon.Potter@amd.com * to be handled as special cases inside the simulator. 72511907SBrandon.Potter@amd.com * If the full path that was created above does not match any of the 72611907SBrandon.Potter@amd.com * special cases, pass it through to the open call on the host to let 72711907SBrandon.Potter@amd.com * the host open the file on our behalf. 72811907SBrandon.Potter@amd.com * If the host cannot open the file, return the host's error code back 72911907SBrandon.Potter@amd.com * through the system call to the simulated process. 73011907SBrandon.Potter@amd.com */ 73111907SBrandon.Potter@amd.com int sim_fd = -1; 73211907SBrandon.Potter@amd.com std::vector<std::string> special_paths = 73311907SBrandon.Potter@amd.com { "/proc/", "/system/", "/sys/", "/platform/", "/etc/passwd" }; 73411907SBrandon.Potter@amd.com for (auto entry : special_paths) { 73511907SBrandon.Potter@amd.com if (startswith(path, entry)) 73611907SBrandon.Potter@amd.com sim_fd = OS::openSpecialFile(path, p, tc); 737360SN/A } 738360SN/A if (sim_fd == -1) { 73910027SChris.Adeniyi-Jones@arm.com sim_fd = open(path.c_str(), host_flags, mode); 74010027SChris.Adeniyi-Jones@arm.com } 74110027SChris.Adeniyi-Jones@arm.com if (sim_fd == -1) { 74211851Sbrandon.potter@amd.com int local = -errno; 74310027SChris.Adeniyi-Jones@arm.com DPRINTF_SYSCALL(Verbose, "open%s: failed -> path:%s\n", 74410027SChris.Adeniyi-Jones@arm.com isopenat ? "at" : "", path.c_str()); 74511907SBrandon.Potter@amd.com return local; 74610027SChris.Adeniyi-Jones@arm.com } 74710027SChris.Adeniyi-Jones@arm.com 74810027SChris.Adeniyi-Jones@arm.com /** 74910027SChris.Adeniyi-Jones@arm.com * The file was opened successfully and needs to be recorded in the 75010027SChris.Adeniyi-Jones@arm.com * process' file descriptor array so that it can be retrieved later. 75111851Sbrandon.potter@amd.com * The target file descriptor that is chosen will be the lowest unused 75211851Sbrandon.potter@amd.com * file descriptor. 75310027SChris.Adeniyi-Jones@arm.com * Return the indirect target file descriptor back to the simulated 75411907SBrandon.Potter@amd.com * process to act as a handle for the opened file. 75510027SChris.Adeniyi-Jones@arm.com */ 75610027SChris.Adeniyi-Jones@arm.com auto ffdp = std::make_shared<FileFDEntry>(sim_fd, host_flags, path, 0); 75710633Smichaelupton@gmail.com int tgt_fd = p->fds->allocFD(ffdp); 75810633Smichaelupton@gmail.com DPRINTF_SYSCALL(Verbose, "open%s: sim_fd[%d], target_fd[%d] -> path:%s\n", 75910633Smichaelupton@gmail.com isopenat ? "at" : "", sim_fd, tgt_fd, path.c_str()); 76011851Sbrandon.potter@amd.com return tgt_fd; 76110633Smichaelupton@gmail.com} 76210633Smichaelupton@gmail.com 76310633Smichaelupton@gmail.com/// Target open() handler. 76410633Smichaelupton@gmail.comtemplate <class OS> 76510633Smichaelupton@gmail.comSyscallReturn 76610633Smichaelupton@gmail.comopenFunc(SyscallDesc *desc, int callnum, Process *process, 76710633Smichaelupton@gmail.com ThreadContext *tc) 76810633Smichaelupton@gmail.com{ 76910633Smichaelupton@gmail.com return openImpl<OS>(desc, callnum, process, tc, false); 77010633Smichaelupton@gmail.com} 77110203SAli.Saidi@ARM.com 77210203SAli.Saidi@ARM.com/// Target openat() handler. 77310203SAli.Saidi@ARM.comtemplate <class OS> 77411851Sbrandon.potter@amd.comSyscallReturn 77511851Sbrandon.potter@amd.comopenatFunc(SyscallDesc *desc, int callnum, Process *process, 77610203SAli.Saidi@ARM.com ThreadContext *tc) 77710203SAli.Saidi@ARM.com{ 77810203SAli.Saidi@ARM.com return openImpl<OS>(desc, callnum, process, tc, true); 77910203SAli.Saidi@ARM.com} 78010203SAli.Saidi@ARM.com 78110203SAli.Saidi@ARM.com/// Target unlinkat() handler. 78210203SAli.Saidi@ARM.comtemplate <class OS> 78310203SAli.Saidi@ARM.comSyscallReturn 78410203SAli.Saidi@ARM.comunlinkatFunc(SyscallDesc *desc, int callnum, Process *process, 78510203SAli.Saidi@ARM.com ThreadContext *tc) 78610203SAli.Saidi@ARM.com{ 78711851Sbrandon.potter@amd.com int index = 0; 78811851Sbrandon.potter@amd.com int dirfd = process->getSyscallArg(tc, index); 78910203SAli.Saidi@ARM.com if (dirfd != OS::TGT_AT_FDCWD) 79010203SAli.Saidi@ARM.com warn("unlinkat: first argument not AT_FDCWD; unlikely to work"); 79110203SAli.Saidi@ARM.com 79210203SAli.Saidi@ARM.com return unlinkHelper(desc, callnum, process, tc, 1); 79310203SAli.Saidi@ARM.com} 79410203SAli.Saidi@ARM.com 79510203SAli.Saidi@ARM.com/// Target facessat() handler 79610203SAli.Saidi@ARM.comtemplate <class OS> 79710850SGiacomo.Gabrielli@arm.comSyscallReturn 79810850SGiacomo.Gabrielli@arm.comfaccessatFunc(SyscallDesc *desc, int callnum, Process *process, 79910850SGiacomo.Gabrielli@arm.com ThreadContext *tc) 80011851Sbrandon.potter@amd.com{ 80110850SGiacomo.Gabrielli@arm.com int index = 0; 80210850SGiacomo.Gabrielli@arm.com int dirfd = process->getSyscallArg(tc, index); 80310850SGiacomo.Gabrielli@arm.com if (dirfd != OS::TGT_AT_FDCWD) 80410850SGiacomo.Gabrielli@arm.com warn("faccessat: first argument not AT_FDCWD; unlikely to work"); 80510850SGiacomo.Gabrielli@arm.com return accessFunc(desc, callnum, process, tc, 1); 80610850SGiacomo.Gabrielli@arm.com} 80710850SGiacomo.Gabrielli@arm.com 80810850SGiacomo.Gabrielli@arm.com/// Target readlinkat() handler 80910850SGiacomo.Gabrielli@arm.comtemplate <class OS> 81010850SGiacomo.Gabrielli@arm.comSyscallReturn 81110850SGiacomo.Gabrielli@arm.comreadlinkatFunc(SyscallDesc *desc, int callnum, Process *process, 81210850SGiacomo.Gabrielli@arm.com ThreadContext *tc) 81310850SGiacomo.Gabrielli@arm.com{ 81410850SGiacomo.Gabrielli@arm.com int index = 0; 81510850SGiacomo.Gabrielli@arm.com int dirfd = process->getSyscallArg(tc, index); 81610850SGiacomo.Gabrielli@arm.com if (dirfd != OS::TGT_AT_FDCWD) 81710850SGiacomo.Gabrielli@arm.com warn("openat: first argument not AT_FDCWD; unlikely to work"); 81810850SGiacomo.Gabrielli@arm.com return readlinkFunc(desc, callnum, process, tc, 1); 81910850SGiacomo.Gabrielli@arm.com} 82010850SGiacomo.Gabrielli@arm.com 82110850SGiacomo.Gabrielli@arm.com/// Target renameat() handler. 82210850SGiacomo.Gabrielli@arm.comtemplate <class OS> 82310850SGiacomo.Gabrielli@arm.comSyscallReturn 82410850SGiacomo.Gabrielli@arm.comrenameatFunc(SyscallDesc *desc, int callnum, Process *process, 82510850SGiacomo.Gabrielli@arm.com ThreadContext *tc) 82610850SGiacomo.Gabrielli@arm.com{ 82710850SGiacomo.Gabrielli@arm.com int index = 0; 82810850SGiacomo.Gabrielli@arm.com 82910850SGiacomo.Gabrielli@arm.com int olddirfd = process->getSyscallArg(tc, index); 83010850SGiacomo.Gabrielli@arm.com if (olddirfd != OS::TGT_AT_FDCWD) 83110850SGiacomo.Gabrielli@arm.com warn("renameat: first argument not AT_FDCWD; unlikely to work"); 83210850SGiacomo.Gabrielli@arm.com 8336640Svince@csl.cornell.edu std::string old_name; 8346640Svince@csl.cornell.edu 8356640Svince@csl.cornell.edu if (!tc->getMemProxy().tryReadString(old_name, 83611851Sbrandon.potter@amd.com process->getSyscallArg(tc, index))) 83711851Sbrandon.potter@amd.com return -EFAULT; 8386640Svince@csl.cornell.edu 8396640Svince@csl.cornell.edu int newdirfd = process->getSyscallArg(tc, index); 8406701Sgblack@eecs.umich.edu if (newdirfd != OS::TGT_AT_FDCWD) 8416701Sgblack@eecs.umich.edu warn("renameat: third argument not AT_FDCWD; unlikely to work"); 84210793Sbrandon.potter@amd.com 8436640Svince@csl.cornell.edu std::string new_name; 84411758Sbrandon.potter@amd.com 84511758Sbrandon.potter@amd.com if (!tc->getMemProxy().tryReadString(new_name, 84611758Sbrandon.potter@amd.com process->getSyscallArg(tc, index))) 8476640Svince@csl.cornell.edu return -EFAULT; 8488706Sandreas.hansson@arm.com 8496640Svince@csl.cornell.edu // Adjust path for current working directory 8506701Sgblack@eecs.umich.edu old_name = process->fullPath(old_name); 8516640Svince@csl.cornell.edu new_name = process->fullPath(new_name); 852360SN/A 8531999SN/A int result = rename(old_name.c_str(), new_name.c_str()); 8541999SN/A return (result == -1) ? -errno : result; 8551999SN/A} 85611851Sbrandon.potter@amd.com 8572680Sktlim@umich.edu/// Target sysinfo() handler. 8581999SN/Atemplate <class OS> 8591999SN/ASyscallReturn 8601999SN/AsysinfoFunc(SyscallDesc *desc, int callnum, Process *process, 8616701Sgblack@eecs.umich.edu ThreadContext *tc) 8628852Sandreas.hansson@arm.com{ 8636701Sgblack@eecs.umich.edu 8641999SN/A int index = 0; 8656701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::tgt_sysinfo> 8661999SN/A sysinfo(process->getSyscallArg(tc, index)); 8676701Sgblack@eecs.umich.edu 8681999SN/A sysinfo->uptime = seconds_since_epoch; 8691999SN/A sysinfo->totalram = process->system->memSize(); 8701999SN/A sysinfo->mem_unit = 1; 8711999SN/A 8721999SN/A sysinfo.copyOut(tc->getMemProxy()); 8733669Sbinkertn@umich.edu 8743669Sbinkertn@umich.edu return 0; 8753669Sbinkertn@umich.edu} 8761999SN/A 8771999SN/A/// Target chmod() handler. 8781999SN/Atemplate <class OS> 8792218SN/ASyscallReturn 8801999SN/AchmodFunc(SyscallDesc *desc, int callnum, Process *process, 8811999SN/A ThreadContext *tc) 8821999SN/A{ 8831999SN/A std::string path; 8841999SN/A 8851999SN/A int index = 0; 8861999SN/A if (!tc->getMemProxy().tryReadString(path, 8871999SN/A process->getSyscallArg(tc, index))) { 88811856Sbrandon.potter@amd.com return -EFAULT; 8891999SN/A } 8906701Sgblack@eecs.umich.edu 89111856Sbrandon.potter@amd.com uint32_t mode = process->getSyscallArg(tc, index); 89211856Sbrandon.potter@amd.com mode_t hostMode = 0; 89310931Sbrandon.potter@amd.com 89411856Sbrandon.potter@amd.com // XXX translate mode flags via OS::something??? 89511856Sbrandon.potter@amd.com hostMode = mode; 8961999SN/A 89711856Sbrandon.potter@amd.com // Adjust path for current working directory 8981999SN/A path = process->fullPath(path); 89911856Sbrandon.potter@amd.com 9001999SN/A // do the chmod 90111856Sbrandon.potter@amd.com int result = chmod(path.c_str(), hostMode); 9021999SN/A if (result < 0) 90311856Sbrandon.potter@amd.com return -errno; 9041999SN/A 9051999SN/A return 0; 9065877Shsul@eecs.umich.edu} 9075877Shsul@eecs.umich.edu 9085877Shsul@eecs.umich.edu 90911851Sbrandon.potter@amd.com/// Target fchmod() handler. 9105877Shsul@eecs.umich.edutemplate <class OS> 9116701Sgblack@eecs.umich.eduSyscallReturn 9126701Sgblack@eecs.umich.edufchmodFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 9136701Sgblack@eecs.umich.edu{ 9146701Sgblack@eecs.umich.edu int index = 0; 9156701Sgblack@eecs.umich.edu int tgt_fd = p->getSyscallArg(tc, index); 91610027SChris.Adeniyi-Jones@arm.com uint32_t mode = p->getSyscallArg(tc, index); 91710027SChris.Adeniyi-Jones@arm.com 91810027SChris.Adeniyi-Jones@arm.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 91910027SChris.Adeniyi-Jones@arm.com if (!ffdp) 92010027SChris.Adeniyi-Jones@arm.com return -EBADF; 9215877Shsul@eecs.umich.edu int sim_fd = ffdp->getSimFD(); 92210318Sandreas.hansson@arm.com 92310318Sandreas.hansson@arm.com mode_t hostMode = mode; 9245877Shsul@eecs.umich.edu 9255877Shsul@eecs.umich.edu int result = fchmod(sim_fd, hostMode); 9265877Shsul@eecs.umich.edu 9275877Shsul@eecs.umich.edu return (result < 0) ? -errno : 0; 92810486Stjablin@gmail.com} 92910486Stjablin@gmail.com 9305877Shsul@eecs.umich.edu/// Target mremap() handler. 93111905SBrandon.Potter@amd.comtemplate <class OS> 93211905SBrandon.Potter@amd.comSyscallReturn 93311905SBrandon.Potter@amd.commremapFunc(SyscallDesc *desc, int callnum, Process *process, ThreadContext *tc) 93411905SBrandon.Potter@amd.com{ 93510027SChris.Adeniyi-Jones@arm.com int index = 0; 93612206Srico.amslinger@informatik.uni-augsburg.de Addr start = process->getSyscallArg(tc, index); 93712206Srico.amslinger@informatik.uni-augsburg.de uint64_t old_length = process->getSyscallArg(tc, index); 9385877Shsul@eecs.umich.edu uint64_t new_length = process->getSyscallArg(tc, index); 93911905SBrandon.Potter@amd.com uint64_t flags = process->getSyscallArg(tc, index); 94011905SBrandon.Potter@amd.com uint64_t provided_address = 0; 9415877Shsul@eecs.umich.edu bool use_provided_address = flags & OS::TGT_MREMAP_FIXED; 9425877Shsul@eecs.umich.edu 94310027SChris.Adeniyi-Jones@arm.com if (use_provided_address) 9445877Shsul@eecs.umich.edu provided_address = process->getSyscallArg(tc, index); 9455877Shsul@eecs.umich.edu 9465877Shsul@eecs.umich.edu if ((start % TheISA::PageBytes != 0) || 94712206Srico.amslinger@informatik.uni-augsburg.de (provided_address % TheISA::PageBytes != 0)) { 94812206Srico.amslinger@informatik.uni-augsburg.de warn("mremap failing: arguments not page aligned"); 94912206Srico.amslinger@informatik.uni-augsburg.de return -EINVAL; 95012206Srico.amslinger@informatik.uni-augsburg.de } 95112206Srico.amslinger@informatik.uni-augsburg.de 95212206Srico.amslinger@informatik.uni-augsburg.de new_length = roundUp(new_length, TheISA::PageBytes); 95312206Srico.amslinger@informatik.uni-augsburg.de 95412206Srico.amslinger@informatik.uni-augsburg.de if (new_length > old_length) { 95512206Srico.amslinger@informatik.uni-augsburg.de std::shared_ptr<MemState> mem_state = process->memState; 95610027SChris.Adeniyi-Jones@arm.com Addr mmap_end = mem_state->getMmapEnd(); 95710027SChris.Adeniyi-Jones@arm.com 95810027SChris.Adeniyi-Jones@arm.com if ((start + old_length) == mmap_end && 95910027SChris.Adeniyi-Jones@arm.com (!use_provided_address || provided_address == start)) { 9605877Shsul@eecs.umich.edu // This case cannot occur when growing downward, as 96110027SChris.Adeniyi-Jones@arm.com // start is greater than or equal to mmap_end. 96210027SChris.Adeniyi-Jones@arm.com uint64_t diff = new_length - old_length; 96310027SChris.Adeniyi-Jones@arm.com process->allocateMem(mmap_end, diff); 96410027SChris.Adeniyi-Jones@arm.com mem_state->setMmapEnd(mmap_end + diff); 96512206Srico.amslinger@informatik.uni-augsburg.de return start; 96612206Srico.amslinger@informatik.uni-augsburg.de } else { 96712206Srico.amslinger@informatik.uni-augsburg.de if (!use_provided_address && !(flags & OS::TGT_MREMAP_MAYMOVE)) { 96812206Srico.amslinger@informatik.uni-augsburg.de warn("can't remap here and MREMAP_MAYMOVE flag not set\n"); 96910027SChris.Adeniyi-Jones@arm.com return -ENOMEM; 97010027SChris.Adeniyi-Jones@arm.com } else { 97110027SChris.Adeniyi-Jones@arm.com uint64_t new_start = provided_address; 97210027SChris.Adeniyi-Jones@arm.com if (!use_provided_address) { 97310027SChris.Adeniyi-Jones@arm.com new_start = process->mmapGrowsDown() ? 97410027SChris.Adeniyi-Jones@arm.com mmap_end - new_length : mmap_end; 9755877Shsul@eecs.umich.edu mmap_end = process->mmapGrowsDown() ? 9765877Shsul@eecs.umich.edu new_start : mmap_end + new_length; 9775877Shsul@eecs.umich.edu mem_state->setMmapEnd(mmap_end); 97810027SChris.Adeniyi-Jones@arm.com } 97910027SChris.Adeniyi-Jones@arm.com 9808601Ssteve.reinhardt@amd.com process->pTable->remap(start, old_length, new_start); 98110027SChris.Adeniyi-Jones@arm.com warn("mremapping to new vaddr %08p-%08p, adding %d\n", 9825877Shsul@eecs.umich.edu new_start, new_start + new_length, 9835877Shsul@eecs.umich.edu new_length - old_length); 9841999SN/A // add on the remaining unallocated pages 985378SN/A process->allocateMem(new_start + old_length, 986360SN/A new_length - old_length, 9871450SN/A use_provided_address /* clobber */); 98811851Sbrandon.potter@amd.com if (use_provided_address && 9892680Sktlim@umich.edu ((new_start + new_length > mem_state->getMmapEnd() && 990360SN/A !process->mmapGrowsDown()) || 991360SN/A (new_start < mem_state->getMmapEnd() && 992360SN/A process->mmapGrowsDown()))) { 9936701Sgblack@eecs.umich.edu // something fishy going on here, at least notify the user 9948852Sandreas.hansson@arm.com // @todo: increase mmap_end? 9956701Sgblack@eecs.umich.edu warn("mmap region limit exceeded with MREMAP_FIXED\n"); 9966701Sgblack@eecs.umich.edu } 9976701Sgblack@eecs.umich.edu warn("returning %08p as start\n", new_start); 9986701Sgblack@eecs.umich.edu return new_start; 999360SN/A } 10003669Sbinkertn@umich.edu } 10013669Sbinkertn@umich.edu } else { 10023669Sbinkertn@umich.edu if (use_provided_address && provided_address != start) 1003360SN/A process->pTable->remap(start, new_length, provided_address); 1004360SN/A process->pTable->unmap(start + new_length, old_length - new_length); 1005360SN/A return use_provided_address ? provided_address : start; 1006360SN/A } 10072218SN/A} 1008360SN/A 10098706Sandreas.hansson@arm.com/// Target stat() handler. 1010360SN/Atemplate <class OS> 10111458SN/ASyscallReturn 1012360SN/AstatFunc(SyscallDesc *desc, int callnum, Process *process, 1013360SN/A ThreadContext *tc) 1014360SN/A{ 10155074Ssaidi@eecs.umich.edu std::string path; 10165074Ssaidi@eecs.umich.edu 10175074Ssaidi@eecs.umich.edu int index = 0; 101811851Sbrandon.potter@amd.com if (!tc->getMemProxy().tryReadString(path, 10195074Ssaidi@eecs.umich.edu process->getSyscallArg(tc, index))) { 10205074Ssaidi@eecs.umich.edu return -EFAULT; 10215074Ssaidi@eecs.umich.edu } 10225074Ssaidi@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 10236701Sgblack@eecs.umich.edu 10248852Sandreas.hansson@arm.com // Adjust path for current working directory 10256701Sgblack@eecs.umich.edu path = process->fullPath(path); 10265074Ssaidi@eecs.umich.edu 10276701Sgblack@eecs.umich.edu struct stat hostBuf; 10285074Ssaidi@eecs.umich.edu int result = stat(path.c_str(), &hostBuf); 10295074Ssaidi@eecs.umich.edu 10305074Ssaidi@eecs.umich.edu if (result < 0) 10315074Ssaidi@eecs.umich.edu return -errno; 10325208Ssaidi@eecs.umich.edu 10335208Ssaidi@eecs.umich.edu copyOutStatBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 10345208Ssaidi@eecs.umich.edu 10355208Ssaidi@eecs.umich.edu return 0; 10365074Ssaidi@eecs.umich.edu} 10375074Ssaidi@eecs.umich.edu 10385208Ssaidi@eecs.umich.edu 10395074Ssaidi@eecs.umich.edu/// Target stat64() handler. 10405074Ssaidi@eecs.umich.edutemplate <class OS> 10415074Ssaidi@eecs.umich.eduSyscallReturn 10425074Ssaidi@eecs.umich.edustat64Func(SyscallDesc *desc, int callnum, Process *process, 10438706Sandreas.hansson@arm.com ThreadContext *tc) 10445074Ssaidi@eecs.umich.edu{ 10455074Ssaidi@eecs.umich.edu std::string path; 10465074Ssaidi@eecs.umich.edu 10475074Ssaidi@eecs.umich.edu int index = 0; 10485074Ssaidi@eecs.umich.edu if (!tc->getMemProxy().tryReadString(path, 104910027SChris.Adeniyi-Jones@arm.com process->getSyscallArg(tc, index))) 105010027SChris.Adeniyi-Jones@arm.com return -EFAULT; 105110027SChris.Adeniyi-Jones@arm.com Addr bufPtr = process->getSyscallArg(tc, index); 105211851Sbrandon.potter@amd.com 105310027SChris.Adeniyi-Jones@arm.com // Adjust path for current working directory 105410027SChris.Adeniyi-Jones@arm.com path = process->fullPath(path); 105510027SChris.Adeniyi-Jones@arm.com 105610027SChris.Adeniyi-Jones@arm.com#if NO_STAT64 105710027SChris.Adeniyi-Jones@arm.com struct stat hostBuf; 105810793Sbrandon.potter@amd.com int result = stat(path.c_str(), &hostBuf); 105910027SChris.Adeniyi-Jones@arm.com#else 106010027SChris.Adeniyi-Jones@arm.com struct stat64 hostBuf; 106110027SChris.Adeniyi-Jones@arm.com int result = stat64(path.c_str(), &hostBuf); 106210027SChris.Adeniyi-Jones@arm.com#endif 106310027SChris.Adeniyi-Jones@arm.com 106410027SChris.Adeniyi-Jones@arm.com if (result < 0) 106510027SChris.Adeniyi-Jones@arm.com return -errno; 106610027SChris.Adeniyi-Jones@arm.com 106710027SChris.Adeniyi-Jones@arm.com copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 106810027SChris.Adeniyi-Jones@arm.com 106910027SChris.Adeniyi-Jones@arm.com return 0; 107010027SChris.Adeniyi-Jones@arm.com} 107110027SChris.Adeniyi-Jones@arm.com 107210027SChris.Adeniyi-Jones@arm.com 107310027SChris.Adeniyi-Jones@arm.com/// Target fstatat64() handler. 107410027SChris.Adeniyi-Jones@arm.comtemplate <class OS> 107510027SChris.Adeniyi-Jones@arm.comSyscallReturn 107610027SChris.Adeniyi-Jones@arm.comfstatat64Func(SyscallDesc *desc, int callnum, Process *process, 107710027SChris.Adeniyi-Jones@arm.com ThreadContext *tc) 107810027SChris.Adeniyi-Jones@arm.com{ 107910027SChris.Adeniyi-Jones@arm.com int index = 0; 108010027SChris.Adeniyi-Jones@arm.com int dirfd = process->getSyscallArg(tc, index); 108110027SChris.Adeniyi-Jones@arm.com if (dirfd != OS::TGT_AT_FDCWD) 108210027SChris.Adeniyi-Jones@arm.com warn("fstatat64: first argument not AT_FDCWD; unlikely to work"); 108310027SChris.Adeniyi-Jones@arm.com 108410027SChris.Adeniyi-Jones@arm.com std::string path; 108510027SChris.Adeniyi-Jones@arm.com if (!tc->getMemProxy().tryReadString(path, 10861999SN/A process->getSyscallArg(tc, index))) 10871999SN/A return -EFAULT; 10881999SN/A Addr bufPtr = process->getSyscallArg(tc, index); 108911856Sbrandon.potter@amd.com 10901999SN/A // Adjust path for current working directory 10916701Sgblack@eecs.umich.edu path = process->fullPath(path); 109211856Sbrandon.potter@amd.com 109311856Sbrandon.potter@amd.com#if NO_STAT64 109410931Sbrandon.potter@amd.com struct stat hostBuf; 109511856Sbrandon.potter@amd.com int result = stat(path.c_str(), &hostBuf); 109611856Sbrandon.potter@amd.com#else 10971999SN/A struct stat64 hostBuf; 109811856Sbrandon.potter@amd.com int result = stat64(path.c_str(), &hostBuf); 10991999SN/A#endif 11002764Sstever@eecs.umich.edu 11012064SN/A if (result < 0) 110210931Sbrandon.potter@amd.com return -errno; 11032064SN/A 11042064SN/A copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 110510931Sbrandon.potter@amd.com 11062064SN/A return 0; 11071999SN/A} 11081999SN/A 11092218SN/A 11101999SN/A/// Target fstat64() handler. 111110931Sbrandon.potter@amd.comtemplate <class OS> 11121999SN/ASyscallReturn 11131999SN/Afstat64Func(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 11141999SN/A{ 11151999SN/A int index = 0; 11161999SN/A int tgt_fd = p->getSyscallArg(tc, index); 1117378SN/A Addr bufPtr = p->getSyscallArg(tc, index); 1118360SN/A 11191450SN/A auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 112011851Sbrandon.potter@amd.com if (!ffdp) 11212680Sktlim@umich.edu return -EBADF; 1122360SN/A int sim_fd = ffdp->getSimFD(); 1123360SN/A 1124360SN/A#if NO_STAT64 11256701Sgblack@eecs.umich.edu struct stat hostBuf; 11268852Sandreas.hansson@arm.com int result = fstat(sim_fd, &hostBuf); 11276701Sgblack@eecs.umich.edu#else 11286701Sgblack@eecs.umich.edu struct stat64 hostBuf; 11296701Sgblack@eecs.umich.edu int result = fstat64(sim_fd, &hostBuf); 11306701Sgblack@eecs.umich.edu#endif 1131360SN/A 11323669Sbinkertn@umich.edu if (result < 0) 11333669Sbinkertn@umich.edu return -errno; 11343669Sbinkertn@umich.edu 1135360SN/A copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf, (sim_fd == 1)); 1136360SN/A 1137360SN/A return 0; 1138360SN/A} 11391458SN/A 1140360SN/A 11418706Sandreas.hansson@arm.com/// Target lstat() handler. 1142360SN/Atemplate <class OS> 11431458SN/ASyscallReturn 1144360SN/AlstatFunc(SyscallDesc *desc, int callnum, Process *process, 1145360SN/A ThreadContext *tc) 11461999SN/A{ 11471999SN/A std::string path; 11481999SN/A 114911851Sbrandon.potter@amd.com int index = 0; 11502680Sktlim@umich.edu if (!tc->getMemProxy().tryReadString(path, 11511999SN/A process->getSyscallArg(tc, index))) { 11521999SN/A return -EFAULT; 11531999SN/A } 11546701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 11558852Sandreas.hansson@arm.com 11566701Sgblack@eecs.umich.edu // Adjust path for current working directory 11576701Sgblack@eecs.umich.edu path = process->fullPath(path); 11586701Sgblack@eecs.umich.edu 11596701Sgblack@eecs.umich.edu struct stat hostBuf; 11601999SN/A int result = lstat(path.c_str(), &hostBuf); 11613669Sbinkertn@umich.edu 11623669Sbinkertn@umich.edu if (result < 0) 11633669Sbinkertn@umich.edu return -errno; 11642764Sstever@eecs.umich.edu 11652064SN/A copyOutStatBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 11662064SN/A 11672064SN/A return 0; 11681999SN/A} 11691999SN/A 11702064SN/A/// Target lstat64() handler. 11711999SN/Atemplate <class OS> 11721999SN/ASyscallReturn 11731999SN/Alstat64Func(SyscallDesc *desc, int callnum, Process *process, 11741999SN/A ThreadContext *tc) 11758706Sandreas.hansson@arm.com{ 11761999SN/A std::string path; 11771999SN/A 11781999SN/A int index = 0; 11791999SN/A if (!tc->getMemProxy().tryReadString(path, 1180378SN/A process->getSyscallArg(tc, index))) { 1181360SN/A return -EFAULT; 11821450SN/A } 118311856Sbrandon.potter@amd.com Addr bufPtr = process->getSyscallArg(tc, index); 1184360SN/A 11856701Sgblack@eecs.umich.edu // Adjust path for current working directory 118611856Sbrandon.potter@amd.com path = process->fullPath(path); 118711856Sbrandon.potter@amd.com 1188360SN/A#if NO_STAT64 118911380Salexandru.dutu@amd.com struct stat hostBuf; 1190360SN/A int result = lstat(path.c_str(), &hostBuf); 119111856Sbrandon.potter@amd.com#else 119211856Sbrandon.potter@amd.com struct stat64 hostBuf; 11931458SN/A int result = lstat64(path.c_str(), &hostBuf); 119411856Sbrandon.potter@amd.com#endif 1195360SN/A 1196360SN/A if (result < 0) 119710931Sbrandon.potter@amd.com return -errno; 1198360SN/A 1199360SN/A copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 12001458SN/A 1201360SN/A return 0; 120210931Sbrandon.potter@amd.com} 12032021SN/A 12041458SN/A/// Target fstat() handler. 1205360SN/Atemplate <class OS> 1206360SN/ASyscallReturn 1207360SN/AfstatFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 12081706SN/A{ 12091706SN/A int index = 0; 12101706SN/A int tgt_fd = p->getSyscallArg(tc, index); 121111851Sbrandon.potter@amd.com Addr bufPtr = p->getSyscallArg(tc, index); 12122680Sktlim@umich.edu 12131706SN/A DPRINTF_SYSCALL(Verbose, "fstat(%d, ...)\n", tgt_fd); 121411799Sbrandon.potter@amd.com 121511799Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 121611799Sbrandon.potter@amd.com if (!ffdp) 12171706SN/A return -EBADF; 12181706SN/A int sim_fd = ffdp->getSimFD(); 12196701Sgblack@eecs.umich.edu 12208852Sandreas.hansson@arm.com struct stat hostBuf; 12216701Sgblack@eecs.umich.edu int result = fstat(sim_fd, &hostBuf); 12226701Sgblack@eecs.umich.edu 12236701Sgblack@eecs.umich.edu if (result < 0) 12246701Sgblack@eecs.umich.edu return -errno; 12251706SN/A 12263669Sbinkertn@umich.edu copyOutStatBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf, (sim_fd == 1)); 12273669Sbinkertn@umich.edu 12283669Sbinkertn@umich.edu return 0; 12291706SN/A} 12301706SN/A 12311706SN/A 12321706SN/A/// Target statfs() handler. 12332218SN/Atemplate <class OS> 12341706SN/ASyscallReturn 123511759Sbrandon.potter@amd.comstatfsFunc(SyscallDesc *desc, int callnum, Process *process, 123611799Sbrandon.potter@amd.com ThreadContext *tc) 12371706SN/A{ 12381706SN/A#if NO_STATFS 12391706SN/A warn("Host OS cannot support calls to statfs. Ignoring syscall"); 124011886Sbrandon.potter@amd.com#else 124111886Sbrandon.potter@amd.com std::string path; 124211886Sbrandon.potter@amd.com 124311886Sbrandon.potter@amd.com int index = 0; 124411886Sbrandon.potter@amd.com if (!tc->getMemProxy().tryReadString(path, 124512426Sqtt2@cornell.edu process->getSyscallArg(tc, index))) { 124611886Sbrandon.potter@amd.com return -EFAULT; 124711886Sbrandon.potter@amd.com } 124811886Sbrandon.potter@amd.com Addr bufPtr = process->getSyscallArg(tc, index); 124912426Sqtt2@cornell.edu 125012426Sqtt2@cornell.edu // Adjust path for current working directory 125112426Sqtt2@cornell.edu path = process->fullPath(path); 125212426Sqtt2@cornell.edu 125312426Sqtt2@cornell.edu struct statfs hostBuf; 125412426Sqtt2@cornell.edu int result = statfs(path.c_str(), &hostBuf); 125512426Sqtt2@cornell.edu 125612426Sqtt2@cornell.edu if (result < 0) 125712426Sqtt2@cornell.edu return -errno; 125812426Sqtt2@cornell.edu 125911886Sbrandon.potter@amd.com copyOutStatfsBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 126011886Sbrandon.potter@amd.com#endif 126112426Sqtt2@cornell.edu return 0; 126211886Sbrandon.potter@amd.com} 126311886Sbrandon.potter@amd.com 126411886Sbrandon.potter@amd.comtemplate <class OS> 126511886Sbrandon.potter@amd.comSyscallReturn 126611886Sbrandon.potter@amd.comcloneFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 126711886Sbrandon.potter@amd.com{ 126811886Sbrandon.potter@amd.com int index = 0; 126911886Sbrandon.potter@amd.com 127011886Sbrandon.potter@amd.com TheISA::IntReg flags = p->getSyscallArg(tc, index); 127111886Sbrandon.potter@amd.com TheISA::IntReg newStack = p->getSyscallArg(tc, index); 127211886Sbrandon.potter@amd.com Addr ptidPtr = p->getSyscallArg(tc, index); 127311886Sbrandon.potter@amd.com 127411886Sbrandon.potter@amd.com#if THE_ISA == RISCV_ISA 127511886Sbrandon.potter@amd.com /** 127611886Sbrandon.potter@amd.com * Linux kernel 4.15 sets CLONE_BACKWARDS flag for RISC-V. 127711886Sbrandon.potter@amd.com * The flag defines the list of clone() arguments in the following 127811886Sbrandon.potter@amd.com * order: flags -> newStack -> ptidPtr -> tlsPtr -> ctidPtr 127911886Sbrandon.potter@amd.com */ 128011886Sbrandon.potter@amd.com Addr tlsPtr M5_VAR_USED = p->getSyscallArg(tc, index); 128111886Sbrandon.potter@amd.com Addr ctidPtr = p->getSyscallArg(tc, index); 128211886Sbrandon.potter@amd.com#else 128311886Sbrandon.potter@amd.com Addr ctidPtr = p->getSyscallArg(tc, index); 128411886Sbrandon.potter@amd.com Addr tlsPtr M5_VAR_USED = p->getSyscallArg(tc, index); 128511886Sbrandon.potter@amd.com#endif 128611886Sbrandon.potter@amd.com 128711886Sbrandon.potter@amd.com if (((flags & OS::TGT_CLONE_SIGHAND)&& !(flags & OS::TGT_CLONE_VM)) || 128811886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_THREAD) && !(flags & OS::TGT_CLONE_SIGHAND)) || 128911886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_FS) && (flags & OS::TGT_CLONE_NEWNS)) || 129011886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_NEWIPC) && (flags & OS::TGT_CLONE_SYSVSEM)) || 129111886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_NEWPID) && (flags & OS::TGT_CLONE_THREAD)) || 129211886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_VM) && !(newStack))) 129311886Sbrandon.potter@amd.com return -EINVAL; 129411886Sbrandon.potter@amd.com 129511886Sbrandon.potter@amd.com ThreadContext *ctc; 129611886Sbrandon.potter@amd.com if (!(ctc = p->findFreeContext())) 129711886Sbrandon.potter@amd.com fatal("clone: no spare thread context in system"); 129811886Sbrandon.potter@amd.com 129911886Sbrandon.potter@amd.com /** 130011886Sbrandon.potter@amd.com * Note that ProcessParams is generated by swig and there are no other 130111886Sbrandon.potter@amd.com * examples of how to create anything but this default constructor. The 130211886Sbrandon.potter@amd.com * fields are manually initialized instead of passing parameters to the 130311886Sbrandon.potter@amd.com * constructor. 130411886Sbrandon.potter@amd.com */ 130511886Sbrandon.potter@amd.com ProcessParams *pp = new ProcessParams(); 130611886Sbrandon.potter@amd.com pp->executable.assign(*(new std::string(p->progName()))); 130711886Sbrandon.potter@amd.com pp->cmd.push_back(*(new std::string(p->progName()))); 130811886Sbrandon.potter@amd.com pp->system = p->system; 130911886Sbrandon.potter@amd.com pp->cwd.assign(p->getcwd()); 131011886Sbrandon.potter@amd.com pp->input.assign("stdin"); 131111886Sbrandon.potter@amd.com pp->output.assign("stdout"); 131211886Sbrandon.potter@amd.com pp->errout.assign("stderr"); 131311886Sbrandon.potter@amd.com pp->uid = p->uid(); 131411886Sbrandon.potter@amd.com pp->euid = p->euid(); 131511886Sbrandon.potter@amd.com pp->gid = p->gid(); 131611886Sbrandon.potter@amd.com pp->egid = p->egid(); 131711886Sbrandon.potter@amd.com 131811886Sbrandon.potter@amd.com /* Find the first free PID that's less than the maximum */ 131911886Sbrandon.potter@amd.com std::set<int> const& pids = p->system->PIDs; 132011886Sbrandon.potter@amd.com int temp_pid = *pids.begin(); 132111886Sbrandon.potter@amd.com do { 132211886Sbrandon.potter@amd.com temp_pid++; 132311911SBrandon.Potter@amd.com } while (pids.find(temp_pid) != pids.end()); 132411911SBrandon.Potter@amd.com if (temp_pid >= System::maxPID) 132511911SBrandon.Potter@amd.com fatal("temp_pid is too large: %d", temp_pid); 132611911SBrandon.Potter@amd.com 132711911SBrandon.Potter@amd.com pp->pid = temp_pid; 132811911SBrandon.Potter@amd.com pp->ppid = (flags & OS::TGT_CLONE_THREAD) ? p->ppid() : p->pid(); 132911911SBrandon.Potter@amd.com Process *cp = pp->create(); 133011886Sbrandon.potter@amd.com delete pp; 133111886Sbrandon.potter@amd.com 133211886Sbrandon.potter@amd.com Process *owner = ctc->getProcessPtr(); 133311886Sbrandon.potter@amd.com ctc->setProcessPtr(cp); 133411886Sbrandon.potter@amd.com cp->assignThreadContext(ctc->contextId()); 133511886Sbrandon.potter@amd.com owner->revokeThreadContext(ctc->contextId()); 133611886Sbrandon.potter@amd.com 133711886Sbrandon.potter@amd.com if (flags & OS::TGT_CLONE_PARENT_SETTID) { 133811886Sbrandon.potter@amd.com BufferArg ptidBuf(ptidPtr, sizeof(long)); 133911886Sbrandon.potter@amd.com long *ptid = (long *)ptidBuf.bufferPtr(); 134011886Sbrandon.potter@amd.com *ptid = cp->pid(); 134111886Sbrandon.potter@amd.com ptidBuf.copyOut(tc->getMemProxy()); 134211886Sbrandon.potter@amd.com } 134311886Sbrandon.potter@amd.com 134411886Sbrandon.potter@amd.com cp->initState(); 134511886Sbrandon.potter@amd.com p->clone(tc, ctc, cp, flags); 134611886Sbrandon.potter@amd.com 134711886Sbrandon.potter@amd.com if (flags & OS::TGT_CLONE_THREAD) { 134811886Sbrandon.potter@amd.com delete cp->sigchld; 134911886Sbrandon.potter@amd.com cp->sigchld = p->sigchld; 135011886Sbrandon.potter@amd.com } else if (flags & OS::TGT_SIGCHLD) { 135111886Sbrandon.potter@amd.com *cp->sigchld = true; 135211886Sbrandon.potter@amd.com } 135311886Sbrandon.potter@amd.com 135411886Sbrandon.potter@amd.com if (flags & OS::TGT_CLONE_CHILD_SETTID) { 135511886Sbrandon.potter@amd.com BufferArg ctidBuf(ctidPtr, sizeof(long)); 135612426Sqtt2@cornell.edu long *ctid = (long *)ctidBuf.bufferPtr(); 135711886Sbrandon.potter@amd.com *ctid = cp->pid(); 135811886Sbrandon.potter@amd.com ctidBuf.copyOut(ctc->getMemProxy()); 135911886Sbrandon.potter@amd.com } 136011886Sbrandon.potter@amd.com 136111886Sbrandon.potter@amd.com if (flags & OS::TGT_CLONE_CHILD_CLEARTID) 136211886Sbrandon.potter@amd.com cp->childClearTID = (uint64_t)ctidPtr; 136311886Sbrandon.potter@amd.com 136411886Sbrandon.potter@amd.com ctc->clearArchRegs(); 136511886Sbrandon.potter@amd.com 136611886Sbrandon.potter@amd.com#if THE_ISA == ALPHA_ISA 136711886Sbrandon.potter@amd.com TheISA::copyMiscRegs(tc, ctc); 136811886Sbrandon.potter@amd.com#elif THE_ISA == SPARC_ISA 136911886Sbrandon.potter@amd.com TheISA::copyRegs(tc, ctc); 137011886Sbrandon.potter@amd.com ctc->setIntReg(TheISA::NumIntArchRegs + 6, 0); 137111886Sbrandon.potter@amd.com ctc->setIntReg(TheISA::NumIntArchRegs + 4, 0); 137211886Sbrandon.potter@amd.com ctc->setIntReg(TheISA::NumIntArchRegs + 3, TheISA::NWindows - 2); 137311886Sbrandon.potter@amd.com ctc->setIntReg(TheISA::NumIntArchRegs + 5, TheISA::NWindows); 137411886Sbrandon.potter@amd.com ctc->setMiscReg(TheISA::MISCREG_CWP, 0); 137511886Sbrandon.potter@amd.com ctc->setIntReg(TheISA::NumIntArchRegs + 7, 0); 137611886Sbrandon.potter@amd.com ctc->setMiscRegNoEffect(TheISA::MISCREG_TL, 0); 137711886Sbrandon.potter@amd.com ctc->setMiscReg(TheISA::MISCREG_ASI, TheISA::ASI_PRIMARY); 137811886Sbrandon.potter@amd.com for (int y = 8; y < 32; y++) 137911886Sbrandon.potter@amd.com ctc->setIntReg(y, tc->readIntReg(y)); 138011886Sbrandon.potter@amd.com#elif THE_ISA == ARM_ISA or THE_ISA == X86_ISA or THE_ISA == RISCV_ISA 138111886Sbrandon.potter@amd.com TheISA::copyRegs(tc, ctc); 138211886Sbrandon.potter@amd.com#endif 138311886Sbrandon.potter@amd.com 13841706SN/A#if THE_ISA == X86_ISA 13851706SN/A if (flags & OS::TGT_CLONE_SETTLS) { 13861706SN/A ctc->setMiscRegNoEffect(TheISA::MISCREG_FS_BASE, tlsPtr); 13871706SN/A ctc->setMiscRegNoEffect(TheISA::MISCREG_FS_EFF_BASE, tlsPtr); 138811856Sbrandon.potter@amd.com } 13891706SN/A#endif 13906701Sgblack@eecs.umich.edu 139111856Sbrandon.potter@amd.com if (newStack) 139211856Sbrandon.potter@amd.com ctc->setIntReg(TheISA::StackPointerReg, newStack); 13931706SN/A 139411856Sbrandon.potter@amd.com cp->setSyscallReturn(ctc, 0); 139511856Sbrandon.potter@amd.com 13961706SN/A#if THE_ISA == ALPHA_ISA 139711856Sbrandon.potter@amd.com ctc->setIntReg(TheISA::SyscallSuccessReg, 0); 13981706SN/A#elif THE_ISA == SPARC_ISA 13991706SN/A tc->setIntReg(TheISA::SyscallPseudoReturnReg, 0); 140010931Sbrandon.potter@amd.com ctc->setIntReg(TheISA::SyscallPseudoReturnReg, 1); 14011706SN/A#endif 14021706SN/A 14032218SN/A ctc->pcState(tc->nextInstAddr()); 14041706SN/A ctc->activate(); 140511759Sbrandon.potter@amd.com 14061706SN/A return cp->pid(); 14071706SN/A} 14081706SN/A 14091706SN/A/// Target fstatfs() handler. 14101706SN/Atemplate <class OS> 14111999SN/ASyscallReturn 14121999SN/AfstatfsFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 14131999SN/A{ 141411856Sbrandon.potter@amd.com int index = 0; 14151999SN/A int tgt_fd = p->getSyscallArg(tc, index); 14166701Sgblack@eecs.umich.edu Addr bufPtr = p->getSyscallArg(tc, index); 141711856Sbrandon.potter@amd.com 141810931Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 141911856Sbrandon.potter@amd.com if (!ffdp) 142011856Sbrandon.potter@amd.com return -EBADF; 14211999SN/A int sim_fd = ffdp->getSimFD(); 142211856Sbrandon.potter@amd.com 14231999SN/A struct statfs hostBuf; 142411856Sbrandon.potter@amd.com int result = fstatfs(sim_fd, &hostBuf); 142511856Sbrandon.potter@amd.com 142611856Sbrandon.potter@amd.com if (result < 0) 14271999SN/A return -errno; 14286227Snate@binkert.org 14291999SN/A copyOutStatfsBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 14302461SN/A 143111856Sbrandon.potter@amd.com return 0; 143211856Sbrandon.potter@amd.com} 14338737Skoansin.tan@gmail.com 14341999SN/A 143511856Sbrandon.potter@amd.com/// Target writev() handler. 143611856Sbrandon.potter@amd.comtemplate <class OS> 14371999SN/ASyscallReturn 14381999SN/AwritevFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 143910931Sbrandon.potter@amd.com{ 14401999SN/A int index = 0; 14416227Snate@binkert.org int tgt_fd = p->getSyscallArg(tc, index); 14421999SN/A 14431999SN/A auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 14441999SN/A if (!hbfdp) 14452218SN/A return -EBADF; 14461999SN/A int sim_fd = hbfdp->getSimFD(); 144710629Sjthestness@gmail.com 14481999SN/A SETranslatingPortProxy &prox = tc->getMemProxy(); 14491999SN/A uint64_t tiov_base = p->getSyscallArg(tc, index); 145011385Sbrandon.potter@amd.com size_t count = p->getSyscallArg(tc, index); 1451360SN/A struct iovec hiov[count]; 14521450SN/A for (size_t i = 0; i < count; ++i) { 145311851Sbrandon.potter@amd.com typename OS::tgt_iovec tiov; 145411385Sbrandon.potter@amd.com 1455360SN/A prox.readBlob(tiov_base + i*sizeof(typename OS::tgt_iovec), 14566701Sgblack@eecs.umich.edu (uint8_t*)&tiov, sizeof(typename OS::tgt_iovec)); 14576701Sgblack@eecs.umich.edu hiov[i].iov_len = TheISA::gtoh(tiov.iov_len); 14586701Sgblack@eecs.umich.edu hiov[i].iov_base = new char [hiov[i].iov_len]; 145911383Sbrandon.potter@amd.com prox.readBlob(TheISA::gtoh(tiov.iov_base), (uint8_t *)hiov[i].iov_base, 146011383Sbrandon.potter@amd.com hiov[i].iov_len); 14618324Ssteve.reinhardt@amd.com } 146210486Stjablin@gmail.com 1463360SN/A int result = writev(sim_fd, hiov, count); 146411385Sbrandon.potter@amd.com 146511385Sbrandon.potter@amd.com for (size_t i = 0; i < count; ++i) 14669008Sgblack@eecs.umich.edu delete [] (char *)hiov[i].iov_base; 146711383Sbrandon.potter@amd.com 146811383Sbrandon.potter@amd.com if (result < 0) 146911383Sbrandon.potter@amd.com return -errno; 147011383Sbrandon.potter@amd.com 147111383Sbrandon.potter@amd.com return result; 147211383Sbrandon.potter@amd.com} 147311383Sbrandon.potter@amd.com 147411383Sbrandon.potter@amd.com/// Real mmap handler. 147511383Sbrandon.potter@amd.comtemplate <class OS> 14768324Ssteve.reinhardt@amd.comSyscallReturn 147711383Sbrandon.potter@amd.commmapImpl(SyscallDesc *desc, int num, Process *p, ThreadContext *tc, 147811383Sbrandon.potter@amd.com bool is_mmap2) 147911383Sbrandon.potter@amd.com{ 148011383Sbrandon.potter@amd.com int index = 0; 148111383Sbrandon.potter@amd.com Addr start = p->getSyscallArg(tc, index); 148211383Sbrandon.potter@amd.com uint64_t length = p->getSyscallArg(tc, index); 148311383Sbrandon.potter@amd.com int prot = p->getSyscallArg(tc, index); 148411383Sbrandon.potter@amd.com int tgt_flags = p->getSyscallArg(tc, index); 148511383Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 148611383Sbrandon.potter@amd.com int offset = p->getSyscallArg(tc, index); 148711383Sbrandon.potter@amd.com 148811383Sbrandon.potter@amd.com if (is_mmap2) 148911383Sbrandon.potter@amd.com offset *= TheISA::PageBytes; 149011383Sbrandon.potter@amd.com 149111383Sbrandon.potter@amd.com if (start & (TheISA::PageBytes - 1) || 149211383Sbrandon.potter@amd.com offset & (TheISA::PageBytes - 1) || 149311383Sbrandon.potter@amd.com (tgt_flags & OS::TGT_MAP_PRIVATE && 149411383Sbrandon.potter@amd.com tgt_flags & OS::TGT_MAP_SHARED) || 149511383Sbrandon.potter@amd.com (!(tgt_flags & OS::TGT_MAP_PRIVATE) && 149611383Sbrandon.potter@amd.com !(tgt_flags & OS::TGT_MAP_SHARED)) || 149711383Sbrandon.potter@amd.com !length) { 149811383Sbrandon.potter@amd.com return -EINVAL; 149911383Sbrandon.potter@amd.com } 150011383Sbrandon.potter@amd.com 15018324Ssteve.reinhardt@amd.com if ((prot & PROT_WRITE) && (tgt_flags & OS::TGT_MAP_SHARED)) { 15025877Shsul@eecs.umich.edu // With shared mmaps, there are two cases to consider: 150310486Stjablin@gmail.com // 1) anonymous: writes should modify the mapping and this should be 150410486Stjablin@gmail.com // visible to observers who share the mapping. Currently, it's 150511383Sbrandon.potter@amd.com // difficult to update the shared mapping because there's no 150611383Sbrandon.potter@amd.com // structure which maintains information about the which virtual 150711383Sbrandon.potter@amd.com // memory areas are shared. If that structure existed, it would be 150811856Sbrandon.potter@amd.com // possible to make the translations point to the same frames. 150911624Smichael.lebeane@amd.com // 2) file-backed: writes should modify the mapping and the file 151011856Sbrandon.potter@amd.com // which is backed by the mapping. The shared mapping problem is the 151111856Sbrandon.potter@amd.com // same as what was mentioned about the anonymous mappings. For 151211856Sbrandon.potter@amd.com // file-backed mappings, the writes to the file are difficult 151311856Sbrandon.potter@amd.com // because it requires syncing what the mapping holds with the file 151411624Smichael.lebeane@amd.com // that resides on the host system. So, any write on a real system 151511624Smichael.lebeane@amd.com // would cause the change to be propagated to the file mapping at 151611624Smichael.lebeane@amd.com // some point in the future (the inode is tracked along with the 151711856Sbrandon.potter@amd.com // mapping). This isn't guaranteed to always happen, but it usually 151811856Sbrandon.potter@amd.com // works well enough. The guarantee is provided by the msync system 151911383Sbrandon.potter@amd.com // call. We could force the change through with shared mappings with 152011856Sbrandon.potter@amd.com // a call to msync, but that again would require more information 1521360SN/A // than we currently maintain. 152211913SBrandon.Potter@amd.com warn("mmap: writing to shared mmap region is currently " 152311383Sbrandon.potter@amd.com "unsupported. The write succeeds on the target, but it " 15248600Ssteve.reinhardt@amd.com "will not be propagated to the host or shared mappings"); 152511383Sbrandon.potter@amd.com } 152611383Sbrandon.potter@amd.com 152711383Sbrandon.potter@amd.com length = roundUp(length, TheISA::PageBytes); 15288600Ssteve.reinhardt@amd.com 15292544SN/A int sim_fd = -1; 15302544SN/A uint8_t *pmap = nullptr; 153111383Sbrandon.potter@amd.com if (!(tgt_flags & OS::TGT_MAP_ANONYMOUS)) { 153211383Sbrandon.potter@amd.com std::shared_ptr<FDEntry> fdep = (*p->fds)[tgt_fd]; 153311383Sbrandon.potter@amd.com 153411905SBrandon.Potter@amd.com auto dfdp = std::dynamic_pointer_cast<DeviceFDEntry>(fdep); 153511905SBrandon.Potter@amd.com if (dfdp) { 153611905SBrandon.Potter@amd.com EmulatedDriver *emul_driver = dfdp->getDriver(); 153711905SBrandon.Potter@amd.com return emul_driver->mmap(p, tc, start, length, prot, 153811905SBrandon.Potter@amd.com tgt_flags, tgt_fd, offset); 153911905SBrandon.Potter@amd.com } 154011905SBrandon.Potter@amd.com 154111383Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(fdep); 154211383Sbrandon.potter@amd.com if (!ffdp) 154311383Sbrandon.potter@amd.com return -EBADF; 154411383Sbrandon.potter@amd.com sim_fd = ffdp->getSimFD(); 154511383Sbrandon.potter@amd.com 154611383Sbrandon.potter@amd.com pmap = (decltype(pmap))mmap(nullptr, length, PROT_READ, MAP_PRIVATE, 154711383Sbrandon.potter@amd.com sim_fd, offset); 154811383Sbrandon.potter@amd.com 154911383Sbrandon.potter@amd.com if (pmap == (decltype(pmap))-1) { 155011383Sbrandon.potter@amd.com warn("mmap: failed to map file into host address space"); 155111383Sbrandon.potter@amd.com return -errno; 155211383Sbrandon.potter@amd.com } 155311383Sbrandon.potter@amd.com } 155411383Sbrandon.potter@amd.com 155511383Sbrandon.potter@amd.com // Extend global mmap region if necessary. Note that we ignore the 15568600Ssteve.reinhardt@amd.com // start address unless MAP_FIXED is specified. 15576672Sgblack@eecs.umich.edu if (!(tgt_flags & OS::TGT_MAP_FIXED)) { 15588600Ssteve.reinhardt@amd.com std::shared_ptr<MemState> mem_state = p->memState; 155911383Sbrandon.potter@amd.com Addr mmap_end = mem_state->getMmapEnd(); 156011383Sbrandon.potter@amd.com 156111383Sbrandon.potter@amd.com start = p->mmapGrowsDown() ? mmap_end - length : mmap_end; 15628601Ssteve.reinhardt@amd.com mmap_end = p->mmapGrowsDown() ? start : mmap_end + length; 15632544SN/A 156411383Sbrandon.potter@amd.com mem_state->setMmapEnd(mmap_end); 156511383Sbrandon.potter@amd.com } 156611383Sbrandon.potter@amd.com 156711383Sbrandon.potter@amd.com DPRINTF_SYSCALL(Verbose, " mmap range is 0x%x - 0x%x\n", 156811383Sbrandon.potter@amd.com start, start + length - 1); 156911383Sbrandon.potter@amd.com 157011383Sbrandon.potter@amd.com // We only allow mappings to overwrite existing mappings if 157111383Sbrandon.potter@amd.com // TGT_MAP_FIXED is set. Otherwise it shouldn't be a problem 157211383Sbrandon.potter@amd.com // because we ignore the start hint if TGT_MAP_FIXED is not set. 157311383Sbrandon.potter@amd.com int clobber = tgt_flags & OS::TGT_MAP_FIXED; 157411383Sbrandon.potter@amd.com if (clobber) { 157511383Sbrandon.potter@amd.com for (auto tc : p->system->threadContexts) { 157611383Sbrandon.potter@amd.com // If we might be overwriting old mappings, we need to 157711383Sbrandon.potter@amd.com // invalidate potentially stale mappings out of the TLBs. 157811383Sbrandon.potter@amd.com tc->getDTBPtr()->flushAll(); 157911383Sbrandon.potter@amd.com tc->getITBPtr()->flushAll(); 158011383Sbrandon.potter@amd.com } 158111383Sbrandon.potter@amd.com } 158211383Sbrandon.potter@amd.com 158311383Sbrandon.potter@amd.com // Allocate physical memory and map it in. If the page table is already 158411383Sbrandon.potter@amd.com // mapped and clobber is not set, the simulator will issue throw a 158511383Sbrandon.potter@amd.com // fatal and bail out of the simulation. 158611383Sbrandon.potter@amd.com p->allocateMem(start, length, clobber); 158711383Sbrandon.potter@amd.com 158811383Sbrandon.potter@amd.com // Transfer content into target address space. 158911383Sbrandon.potter@amd.com SETranslatingPortProxy &tp = tc->getMemProxy(); 159011383Sbrandon.potter@amd.com if (tgt_flags & OS::TGT_MAP_ANONYMOUS) { 159111383Sbrandon.potter@amd.com // In general, we should zero the mapped area for anonymous mappings, 159211383Sbrandon.potter@amd.com // with something like: 159311383Sbrandon.potter@amd.com // tp.memsetBlob(start, 0, length); 159411383Sbrandon.potter@amd.com // However, given that we don't support sparse mappings, and 159511383Sbrandon.potter@amd.com // some applications can map a couple of gigabytes of space 159611392Sbrandon.potter@amd.com // (intending sparse usage), that can get painfully expensive. 159711392Sbrandon.potter@amd.com // Fortunately, since we don't properly implement munmap either, 159811392Sbrandon.potter@amd.com // there's no danger of remapping used memory, so for now all 159911392Sbrandon.potter@amd.com // newly mapped memory should already be zeroed so we can skip it. 160011392Sbrandon.potter@amd.com } else { 160111392Sbrandon.potter@amd.com // It is possible to mmap an area larger than a file, however 160211392Sbrandon.potter@amd.com // accessing unmapped portions the system triggers a "Bus error" 160311392Sbrandon.potter@amd.com // on the host. We must know when to stop copying the file from 160411392Sbrandon.potter@amd.com // the host into the target address space. 160511392Sbrandon.potter@amd.com struct stat file_stat; 160611392Sbrandon.potter@amd.com if (fstat(sim_fd, &file_stat) > 0) 160711392Sbrandon.potter@amd.com fatal("mmap: cannot stat file"); 160811392Sbrandon.potter@amd.com 160911392Sbrandon.potter@amd.com // Copy the portion of the file that is resident. This requires 161011856Sbrandon.potter@amd.com // checking both the mmap size and the filesize that we are 161111856Sbrandon.potter@amd.com // trying to mmap into this space; the mmap size also depends 161211856Sbrandon.potter@amd.com // on the specified offset into the file. 161311392Sbrandon.potter@amd.com uint64_t size = std::min((uint64_t)file_stat.st_size - offset, 161411392Sbrandon.potter@amd.com length); 161511392Sbrandon.potter@amd.com tp.writeBlob(start, pmap, size); 161611392Sbrandon.potter@amd.com 161711392Sbrandon.potter@amd.com // Cleanup the mmap region before exiting this function. 161811392Sbrandon.potter@amd.com munmap(pmap, length); 161911392Sbrandon.potter@amd.com 162011392Sbrandon.potter@amd.com // Maintain the symbol table for dynamic executables. 162111383Sbrandon.potter@amd.com // The loader will call mmap to map the images into its address 162211383Sbrandon.potter@amd.com // space and we intercept that here. We can verify that we are 162311383Sbrandon.potter@amd.com // executing inside the loader by checking the program counter value. 162411383Sbrandon.potter@amd.com // XXX: with multiprogrammed workloads or multi-node configurations, 162511383Sbrandon.potter@amd.com // this will not work since there is a single global symbol table. 16261458SN/A ObjectFile *interpreter = p->getInterpreter(); 1627360SN/A if (interpreter) { 1628360SN/A Addr text_start = interpreter->textBase(); 162911593Santhony.gutierrez@amd.com Addr text_end = text_start + interpreter->textSize(); 163011593Santhony.gutierrez@amd.com 163111851Sbrandon.potter@amd.com Addr pc = tc->pcState().pc(); 163211593Santhony.gutierrez@amd.com 163311593Santhony.gutierrez@amd.com if (pc >= text_start && pc < text_end) { 163411593Santhony.gutierrez@amd.com std::shared_ptr<FDEntry> fdep = (*p->fds)[tgt_fd]; 163511593Santhony.gutierrez@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(fdep); 163611593Santhony.gutierrez@amd.com ObjectFile *lib = createObjectFile(ffdp->getFileName()); 163711593Santhony.gutierrez@amd.com 163811593Santhony.gutierrez@amd.com if (lib) { 163911856Sbrandon.potter@amd.com lib->loadAllSymbols(debugSymbolTable, 164011856Sbrandon.potter@amd.com lib->textBase(), start); 164111593Santhony.gutierrez@amd.com } 164211856Sbrandon.potter@amd.com } 164311593Santhony.gutierrez@amd.com } 164411593Santhony.gutierrez@amd.com 164511593Santhony.gutierrez@amd.com // Note that we do not zero out the remainder of the mapping. This 164611593Santhony.gutierrez@amd.com // is done by a real system, but it probably will not affect 164711594Santhony.gutierrez@amd.com // execution (hopefully). 164811593Santhony.gutierrez@amd.com } 164911593Santhony.gutierrez@amd.com 165011593Santhony.gutierrez@amd.com return start; 165111593Santhony.gutierrez@amd.com} 165211385Sbrandon.potter@amd.com 165311385Sbrandon.potter@amd.comtemplate <class OS> 165411385Sbrandon.potter@amd.comSyscallReturn 165511851Sbrandon.potter@amd.compwrite64Func(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 165611385Sbrandon.potter@amd.com{ 165711385Sbrandon.potter@amd.com int index = 0; 165811385Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 165911385Sbrandon.potter@amd.com Addr bufPtr = p->getSyscallArg(tc, index); 166011385Sbrandon.potter@amd.com int nbytes = p->getSyscallArg(tc, index); 166111385Sbrandon.potter@amd.com int offset = p->getSyscallArg(tc, index); 166211385Sbrandon.potter@amd.com 166311851Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 166411385Sbrandon.potter@amd.com if (!ffdp) 166511385Sbrandon.potter@amd.com return -EBADF; 166611385Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 166711385Sbrandon.potter@amd.com 1668378SN/A BufferArg bufArg(bufPtr, nbytes); 1669360SN/A bufArg.copyIn(tc->getMemProxy()); 16701450SN/A 167111851Sbrandon.potter@amd.com int bytes_written = pwrite(sim_fd, bufArg.bufferPtr(), nbytes, offset); 167211851Sbrandon.potter@amd.com 1673360SN/A return (bytes_written == -1) ? -errno : bytes_written; 16746701Sgblack@eecs.umich.edu} 16756701Sgblack@eecs.umich.edu 16766701Sgblack@eecs.umich.edu/// Target mmap() handler. 1677360SN/Atemplate <class OS> 1678360SN/ASyscallReturn 167911906SBrandon.Potter@amd.commmapFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 168011906SBrandon.Potter@amd.com{ 168111906SBrandon.Potter@amd.com return mmapImpl<OS>(desc, num, p, tc, false); 168211906SBrandon.Potter@amd.com} 168311906SBrandon.Potter@amd.com 168411906SBrandon.Potter@amd.com/// Target mmap2() handler. 1685360SN/Atemplate <class OS> 168611906SBrandon.Potter@amd.comSyscallReturn 168711906SBrandon.Potter@amd.commmap2Func(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 168811906SBrandon.Potter@amd.com{ 168911906SBrandon.Potter@amd.com return mmapImpl<OS>(desc, num, p, tc, true); 169011906SBrandon.Potter@amd.com} 169111906SBrandon.Potter@amd.com 16925877Shsul@eecs.umich.edu/// Target getrlimit() handler. 169311906SBrandon.Potter@amd.comtemplate <class OS> 169411906SBrandon.Potter@amd.comSyscallReturn 169511906SBrandon.Potter@amd.comgetrlimitFunc(SyscallDesc *desc, int callnum, Process *process, 169611906SBrandon.Potter@amd.com ThreadContext *tc) 1697360SN/A{ 1698360SN/A int index = 0; 16998706Sandreas.hansson@arm.com unsigned resource = process->getSyscallArg(tc, index); 17001458SN/A TypedBufferArg<typename OS::rlimit> rlp(process->getSyscallArg(tc, index)); 1701360SN/A 1702360SN/A switch (resource) { 170312235Sar4jc@virginia.edu case OS::TGT_RLIMIT_STACK: 170412235Sar4jc@virginia.edu // max stack size in bytes: make up a number (8MB for now) 170512235Sar4jc@virginia.edu rlp->rlim_cur = rlp->rlim_max = 8 * 1024 * 1024; 170612235Sar4jc@virginia.edu rlp->rlim_cur = TheISA::htog(rlp->rlim_cur); 170712235Sar4jc@virginia.edu rlp->rlim_max = TheISA::htog(rlp->rlim_max); 170812235Sar4jc@virginia.edu break; 170912235Sar4jc@virginia.edu 171012235Sar4jc@virginia.edu case OS::TGT_RLIMIT_DATA: 171112235Sar4jc@virginia.edu // max data segment size in bytes: make up a number 171212235Sar4jc@virginia.edu rlp->rlim_cur = rlp->rlim_max = 256 * 1024 * 1024; 171312235Sar4jc@virginia.edu rlp->rlim_cur = TheISA::htog(rlp->rlim_cur); 171412235Sar4jc@virginia.edu rlp->rlim_max = TheISA::htog(rlp->rlim_max); 171512235Sar4jc@virginia.edu break; 171612235Sar4jc@virginia.edu 171712235Sar4jc@virginia.edu default: 171812235Sar4jc@virginia.edu warn("getrlimit: unimplemented resource %d", resource); 171912235Sar4jc@virginia.edu return -EINVAL; 172012235Sar4jc@virginia.edu break; 172112416Sqtt2@cornell.edu } 172212235Sar4jc@virginia.edu 172312235Sar4jc@virginia.edu rlp.copyOut(tc->getMemProxy()); 172412235Sar4jc@virginia.edu return 0; 172512235Sar4jc@virginia.edu} 172612235Sar4jc@virginia.edu 172712235Sar4jc@virginia.edutemplate <class OS> 172812235Sar4jc@virginia.eduSyscallReturn 172912235Sar4jc@virginia.eduprlimitFunc(SyscallDesc *desc, int callnum, Process *process, 173012235Sar4jc@virginia.edu ThreadContext *tc) 173112235Sar4jc@virginia.edu{ 173212235Sar4jc@virginia.edu int index = 0; 173312235Sar4jc@virginia.edu if (process->getSyscallArg(tc, index) != 0) 173412593Sjason@lowepower.com { 173512235Sar4jc@virginia.edu warn("prlimit: ignoring rlimits for nonzero pid"); 173612235Sar4jc@virginia.edu return -EPERM; 173712235Sar4jc@virginia.edu } 173812235Sar4jc@virginia.edu int resource = process->getSyscallArg(tc, index); 173912235Sar4jc@virginia.edu Addr n = process->getSyscallArg(tc, index); 174012235Sar4jc@virginia.edu if (n != 0) 174112235Sar4jc@virginia.edu warn("prlimit: ignoring new rlimit"); 174212235Sar4jc@virginia.edu Addr o = process->getSyscallArg(tc, index); 174312235Sar4jc@virginia.edu if (o != 0) 174412235Sar4jc@virginia.edu { 174510796Sbrandon.potter@amd.com TypedBufferArg<typename OS::rlimit> rlp(o); 174610796Sbrandon.potter@amd.com switch (resource) { 174710796Sbrandon.potter@amd.com case OS::TGT_RLIMIT_STACK: 174811851Sbrandon.potter@amd.com // max stack size in bytes: make up a number (8MB for now) 174910796Sbrandon.potter@amd.com rlp->rlim_cur = rlp->rlim_max = 8 * 1024 * 1024; 175010796Sbrandon.potter@amd.com rlp->rlim_cur = TheISA::htog(rlp->rlim_cur); 175110796Sbrandon.potter@amd.com rlp->rlim_max = TheISA::htog(rlp->rlim_max); 175210796Sbrandon.potter@amd.com break; 175310796Sbrandon.potter@amd.com case OS::TGT_RLIMIT_DATA: 175410796Sbrandon.potter@amd.com // max data segment size in bytes: make up a number 175510796Sbrandon.potter@amd.com rlp->rlim_cur = rlp->rlim_max = 256*1024*1024; 175610796Sbrandon.potter@amd.com rlp->rlim_cur = TheISA::htog(rlp->rlim_cur); 175710796Sbrandon.potter@amd.com rlp->rlim_max = TheISA::htog(rlp->rlim_max); 175810796Sbrandon.potter@amd.com break; 175910796Sbrandon.potter@amd.com default: 176010796Sbrandon.potter@amd.com warn("prlimit: unimplemented resource %d", resource); 176110796Sbrandon.potter@amd.com return -EINVAL; 176210796Sbrandon.potter@amd.com break; 176310796Sbrandon.potter@amd.com } 176411337SMichael.Lebeane@amd.com rlp.copyOut(tc->getMemProxy()); 176511337SMichael.Lebeane@amd.com } 176611337SMichael.Lebeane@amd.com return 0; 176711851Sbrandon.potter@amd.com} 176811337SMichael.Lebeane@amd.com 176911337SMichael.Lebeane@amd.com/// Target clock_gettime() function. 177011337SMichael.Lebeane@amd.comtemplate <class OS> 177111337SMichael.Lebeane@amd.comSyscallReturn 177211337SMichael.Lebeane@amd.comclock_gettimeFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 177311337SMichael.Lebeane@amd.com{ 177411337SMichael.Lebeane@amd.com int index = 1; 177511337SMichael.Lebeane@amd.com //int clk_id = p->getSyscallArg(tc, index); 177611337SMichael.Lebeane@amd.com TypedBufferArg<typename OS::timespec> tp(p->getSyscallArg(tc, index)); 177711337SMichael.Lebeane@amd.com 177811337SMichael.Lebeane@amd.com getElapsedTimeNano(tp->tv_sec, tp->tv_nsec); 177911337SMichael.Lebeane@amd.com tp->tv_sec += seconds_since_epoch; 178011337SMichael.Lebeane@amd.com tp->tv_sec = TheISA::htog(tp->tv_sec); 1781378SN/A tp->tv_nsec = TheISA::htog(tp->tv_nsec); 1782360SN/A 17831450SN/A tp.copyOut(tc->getMemProxy()); 178411851Sbrandon.potter@amd.com 178511851Sbrandon.potter@amd.com return 0; 1786360SN/A} 17876701Sgblack@eecs.umich.edu 17886701Sgblack@eecs.umich.edu/// Target clock_getres() function. 1789360SN/Atemplate <class OS> 179010796Sbrandon.potter@amd.comSyscallReturn 1791360SN/Aclock_getresFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 17926109Ssanchezd@stanford.edu{ 17936109Ssanchezd@stanford.edu int index = 1; 1794360SN/A TypedBufferArg<typename OS::timespec> tp(p->getSyscallArg(tc, index)); 17958706Sandreas.hansson@arm.com 1796360SN/A // Set resolution at ns, which is what clock_gettime() returns 17971458SN/A tp->tv_sec = 0; 1798360SN/A tp->tv_nsec = 1; 1799360SN/A 1800360SN/A tp.copyOut(tc->getMemProxy()); 18011999SN/A 18021999SN/A return 0; 18031999SN/A} 180411851Sbrandon.potter@amd.com 18052680Sktlim@umich.edu/// Target gettimeofday() handler. 18061999SN/Atemplate <class OS> 18071999SN/ASyscallReturn 18081999SN/AgettimeofdayFunc(SyscallDesc *desc, int callnum, Process *process, 18096701Sgblack@eecs.umich.edu ThreadContext *tc) 18108852Sandreas.hansson@arm.com{ 18116701Sgblack@eecs.umich.edu int index = 0; 18126701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::timeval> tp(process->getSyscallArg(tc, index)); 18136701Sgblack@eecs.umich.edu 18141999SN/A getElapsedTimeMicro(tp->tv_sec, tp->tv_usec); 18156701Sgblack@eecs.umich.edu tp->tv_sec += seconds_since_epoch; 18166701Sgblack@eecs.umich.edu tp->tv_sec = TheISA::htog(tp->tv_sec); 18178706Sandreas.hansson@arm.com tp->tv_usec = TheISA::htog(tp->tv_usec); 18181999SN/A 18191999SN/A tp.copyOut(tc->getMemProxy()); 182011906SBrandon.Potter@amd.com 18218737Skoansin.tan@gmail.com return 0; 18228737Skoansin.tan@gmail.com} 18231999SN/A 18243669Sbinkertn@umich.edu 18253669Sbinkertn@umich.edu/// Target utimes() handler. 18263669Sbinkertn@umich.edutemplate <class OS> 18273669Sbinkertn@umich.eduSyscallReturn 18281999SN/AutimesFunc(SyscallDesc *desc, int callnum, Process *process, 18291999SN/A ThreadContext *tc) 18301999SN/A{ 18311999SN/A std::string path; 18321999SN/A 18331999SN/A int index = 0; 18341999SN/A if (!tc->getMemProxy().tryReadString(path, 183511886Sbrandon.potter@amd.com process->getSyscallArg(tc, index))) { 183611886Sbrandon.potter@amd.com return -EFAULT; 183711886Sbrandon.potter@amd.com } 183811886Sbrandon.potter@amd.com 183911886Sbrandon.potter@amd.com TypedBufferArg<typename OS::timeval [2]> 184011886Sbrandon.potter@amd.com tp(process->getSyscallArg(tc, index)); 184111886Sbrandon.potter@amd.com tp.copyIn(tc->getMemProxy()); 184211886Sbrandon.potter@amd.com 184311886Sbrandon.potter@amd.com struct timeval hostTimeval[2]; 184411886Sbrandon.potter@amd.com for (int i = 0; i < 2; ++i) { 184511886Sbrandon.potter@amd.com hostTimeval[i].tv_sec = TheISA::gtoh((*tp)[i].tv_sec); 184611886Sbrandon.potter@amd.com hostTimeval[i].tv_usec = TheISA::gtoh((*tp)[i].tv_usec); 184711886Sbrandon.potter@amd.com } 184811886Sbrandon.potter@amd.com 184911886Sbrandon.potter@amd.com // Adjust path for current working directory 185011886Sbrandon.potter@amd.com path = process->fullPath(path); 185111886Sbrandon.potter@amd.com 185211886Sbrandon.potter@amd.com int result = utimes(path.c_str(), hostTimeval); 185311886Sbrandon.potter@amd.com 185411886Sbrandon.potter@amd.com if (result < 0) 185511886Sbrandon.potter@amd.com return -errno; 185611886Sbrandon.potter@amd.com 185711886Sbrandon.potter@amd.com return 0; 185811886Sbrandon.potter@amd.com} 185911886Sbrandon.potter@amd.com 186011886Sbrandon.potter@amd.comtemplate <class OS> 186111886Sbrandon.potter@amd.comSyscallReturn 186211886Sbrandon.potter@amd.comexecveFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 186311886Sbrandon.potter@amd.com{ 186411886Sbrandon.potter@amd.com desc->setFlags(0); 186511886Sbrandon.potter@amd.com 186611886Sbrandon.potter@amd.com int index = 0; 186711886Sbrandon.potter@amd.com std::string path; 186811886Sbrandon.potter@amd.com SETranslatingPortProxy & mem_proxy = tc->getMemProxy(); 186911886Sbrandon.potter@amd.com if (!mem_proxy.tryReadString(path, p->getSyscallArg(tc, index))) 187011886Sbrandon.potter@amd.com return -EFAULT; 187111886Sbrandon.potter@amd.com 187211886Sbrandon.potter@amd.com if (access(path.c_str(), F_OK) == -1) 187311886Sbrandon.potter@amd.com return -EACCES; 187411886Sbrandon.potter@amd.com 187511886Sbrandon.potter@amd.com auto read_in = [](std::vector<std::string> & vect, 187611886Sbrandon.potter@amd.com SETranslatingPortProxy & mem_proxy, 187711886Sbrandon.potter@amd.com Addr mem_loc) 187811886Sbrandon.potter@amd.com { 187911886Sbrandon.potter@amd.com for (int inc = 0; ; inc++) { 188011886Sbrandon.potter@amd.com BufferArg b((mem_loc + sizeof(Addr) * inc), sizeof(Addr)); 188111886Sbrandon.potter@amd.com b.copyIn(mem_proxy); 188211886Sbrandon.potter@amd.com 188311886Sbrandon.potter@amd.com if (!*(Addr*)b.bufferPtr()) 188411886Sbrandon.potter@amd.com break; 188511886Sbrandon.potter@amd.com 188611886Sbrandon.potter@amd.com vect.push_back(std::string()); 188711886Sbrandon.potter@amd.com mem_proxy.tryReadString(vect[inc], *(Addr*)b.bufferPtr()); 188811886Sbrandon.potter@amd.com } 188911886Sbrandon.potter@amd.com }; 189011886Sbrandon.potter@amd.com 189111886Sbrandon.potter@amd.com /** 189211886Sbrandon.potter@amd.com * Note that ProcessParams is generated by swig and there are no other 189311886Sbrandon.potter@amd.com * examples of how to create anything but this default constructor. The 189411886Sbrandon.potter@amd.com * fields are manually initialized instead of passing parameters to the 189511886Sbrandon.potter@amd.com * constructor. 189611886Sbrandon.potter@amd.com */ 189711886Sbrandon.potter@amd.com ProcessParams *pp = new ProcessParams(); 189811886Sbrandon.potter@amd.com pp->executable = path; 189911886Sbrandon.potter@amd.com Addr argv_mem_loc = p->getSyscallArg(tc, index); 190011886Sbrandon.potter@amd.com read_in(pp->cmd, mem_proxy, argv_mem_loc); 190111886Sbrandon.potter@amd.com Addr envp_mem_loc = p->getSyscallArg(tc, index); 190211886Sbrandon.potter@amd.com read_in(pp->env, mem_proxy, envp_mem_loc); 190311886Sbrandon.potter@amd.com pp->uid = p->uid(); 190411886Sbrandon.potter@amd.com pp->egid = p->egid(); 190511886Sbrandon.potter@amd.com pp->euid = p->euid(); 190611886Sbrandon.potter@amd.com pp->gid = p->gid(); 190711886Sbrandon.potter@amd.com pp->ppid = p->ppid(); 190811886Sbrandon.potter@amd.com pp->pid = p->pid(); 190911886Sbrandon.potter@amd.com pp->input.assign("cin"); 191011886Sbrandon.potter@amd.com pp->output.assign("cout"); 191111886Sbrandon.potter@amd.com pp->errout.assign("cerr"); 191211886Sbrandon.potter@amd.com pp->cwd.assign(p->getcwd()); 191311886Sbrandon.potter@amd.com pp->system = p->system; 191411886Sbrandon.potter@amd.com /** 191511886Sbrandon.potter@amd.com * Prevent process object creation with identical PIDs (which will trip 191611886Sbrandon.potter@amd.com * a fatal check in Process constructor). The execve call is supposed to 191711886Sbrandon.potter@amd.com * take over the currently executing process' identity but replace 191811886Sbrandon.potter@amd.com * whatever it is doing with a new process image. Instead of hijacking 191911886Sbrandon.potter@amd.com * the process object in the simulator, we create a new process object 192011886Sbrandon.potter@amd.com * and bind to the previous process' thread below (hijacking the thread). 192111886Sbrandon.potter@amd.com */ 192211886Sbrandon.potter@amd.com p->system->PIDs.erase(p->pid()); 192311886Sbrandon.potter@amd.com Process *new_p = pp->create(); 192411886Sbrandon.potter@amd.com delete pp; 192511886Sbrandon.potter@amd.com 192611886Sbrandon.potter@amd.com /** 192711886Sbrandon.potter@amd.com * Work through the file descriptor array and close any files marked 1928378SN/A * close-on-exec. 1929360SN/A */ 19301450SN/A new_p->fds = p->fds; 193111851Sbrandon.potter@amd.com for (int i = 0; i < new_p->fds->getSize(); i++) { 19322680Sktlim@umich.edu std::shared_ptr<FDEntry> fdep = (*new_p->fds)[i]; 1933360SN/A if (fdep && fdep->getCOE()) 19346701Sgblack@eecs.umich.edu new_p->fds->closeFDEntry(i); 19356701Sgblack@eecs.umich.edu } 19366701Sgblack@eecs.umich.edu 1937360SN/A *new_p->sigchld = true; 19383670Sbinkertn@umich.edu 19393670Sbinkertn@umich.edu delete p; 1940360SN/A tc->clearArchRegs(); 1941360SN/A tc->setProcessPtr(new_p); 1942360SN/A new_p->assignThreadContext(tc->contextId()); 1943360SN/A new_p->initState(); 1944360SN/A tc->activate(); 1945360SN/A TheISA::PCState pcState = tc->pcState(); 1946360SN/A tc->setNPC(pcState.instAddr()); 1947360SN/A 1948360SN/A desc->setFlags(SyscallDesc::SuppressReturnValue); 1949360SN/A return 0; 1950360SN/A} 1951360SN/A 1952360SN/A/// Target getrusage() function. 1953360SN/Atemplate <class OS> 1954360SN/ASyscallReturn 1955360SN/AgetrusageFunc(SyscallDesc *desc, int callnum, Process *process, 1956360SN/A ThreadContext *tc) 19573670Sbinkertn@umich.edu{ 19583670Sbinkertn@umich.edu int index = 0; 195910796Sbrandon.potter@amd.com int who = process->getSyscallArg(tc, index); // THREAD, SELF, or CHILDREN 19608737Skoansin.tan@gmail.com TypedBufferArg<typename OS::rusage> rup(process->getSyscallArg(tc, index)); 19618737Skoansin.tan@gmail.com 19623670Sbinkertn@umich.edu rup->ru_utime.tv_sec = 0; 19633670Sbinkertn@umich.edu rup->ru_utime.tv_usec = 0; 19643670Sbinkertn@umich.edu rup->ru_stime.tv_sec = 0; 19653670Sbinkertn@umich.edu rup->ru_stime.tv_usec = 0; 19663670Sbinkertn@umich.edu rup->ru_maxrss = 0; 19673670Sbinkertn@umich.edu rup->ru_ixrss = 0; 19683670Sbinkertn@umich.edu rup->ru_idrss = 0; 19693670Sbinkertn@umich.edu rup->ru_isrss = 0; 19703670Sbinkertn@umich.edu rup->ru_minflt = 0; 19713670Sbinkertn@umich.edu rup->ru_majflt = 0; 19723670Sbinkertn@umich.edu rup->ru_nswap = 0; 19733670Sbinkertn@umich.edu rup->ru_inblock = 0; 19743670Sbinkertn@umich.edu rup->ru_oublock = 0; 19758706Sandreas.hansson@arm.com rup->ru_msgsnd = 0; 1976360SN/A rup->ru_msgrcv = 0; 19771458SN/A rup->ru_nsignals = 0; 1978360SN/A rup->ru_nvcsw = 0; 1979360SN/A rup->ru_nivcsw = 0; 19806683Stjones1@inf.ed.ac.uk 19816683Stjones1@inf.ed.ac.uk switch (who) { 19826683Stjones1@inf.ed.ac.uk case OS::TGT_RUSAGE_SELF: 198311851Sbrandon.potter@amd.com getElapsedTimeMicro(rup->ru_utime.tv_sec, rup->ru_utime.tv_usec); 198411851Sbrandon.potter@amd.com rup->ru_utime.tv_sec = TheISA::htog(rup->ru_utime.tv_sec); 19856683Stjones1@inf.ed.ac.uk rup->ru_utime.tv_usec = TheISA::htog(rup->ru_utime.tv_usec); 19866701Sgblack@eecs.umich.edu break; 19876701Sgblack@eecs.umich.edu 19886683Stjones1@inf.ed.ac.uk case OS::TGT_RUSAGE_CHILDREN: 19896683Stjones1@inf.ed.ac.uk // do nothing. We have no child processes, so they take no time. 19907823Ssteve.reinhardt@amd.com break; 19916683Stjones1@inf.ed.ac.uk 19926683Stjones1@inf.ed.ac.uk default: 19936683Stjones1@inf.ed.ac.uk // don't really handle THREAD or CHILDREN, but just warn and 19946683Stjones1@inf.ed.ac.uk // plow ahead 19956683Stjones1@inf.ed.ac.uk warn("getrusage() only supports RUSAGE_SELF. Parameter %d ignored.", 19966683Stjones1@inf.ed.ac.uk who); 19978737Skoansin.tan@gmail.com } 19986683Stjones1@inf.ed.ac.uk 19996683Stjones1@inf.ed.ac.uk rup.copyOut(tc->getMemProxy()); 20008706Sandreas.hansson@arm.com 20016683Stjones1@inf.ed.ac.uk return 0; 20026683Stjones1@inf.ed.ac.uk} 20036683Stjones1@inf.ed.ac.uk 20046683Stjones1@inf.ed.ac.uk/// Target times() function. 20052553SN/Atemplate <class OS> 20066684Stjones1@inf.ed.ac.ukSyscallReturn 20076684Stjones1@inf.ed.ac.uktimesFunc(SyscallDesc *desc, int callnum, Process *process, 20086684Stjones1@inf.ed.ac.uk ThreadContext *tc) 200911851Sbrandon.potter@amd.com{ 20106684Stjones1@inf.ed.ac.uk int index = 0; 20116684Stjones1@inf.ed.ac.uk TypedBufferArg<typename OS::tms> bufp(process->getSyscallArg(tc, index)); 201210796Sbrandon.potter@amd.com 20136684Stjones1@inf.ed.ac.uk // Fill in the time structure (in clocks) 20146684Stjones1@inf.ed.ac.uk int64_t clocks = curTick() * OS::M5_SC_CLK_TCK / SimClock::Int::s; 20156701Sgblack@eecs.umich.edu bufp->tms_utime = clocks; 20166701Sgblack@eecs.umich.edu bufp->tms_stime = 0; 201711321Ssteve.reinhardt@amd.com bufp->tms_cutime = 0; 20186684Stjones1@inf.ed.ac.uk bufp->tms_cstime = 0; 20198737Skoansin.tan@gmail.com 20208852Sandreas.hansson@arm.com // Convert to host endianness 20218852Sandreas.hansson@arm.com bufp->tms_utime = TheISA::htog(bufp->tms_utime); 20226684Stjones1@inf.ed.ac.uk 20236684Stjones1@inf.ed.ac.uk // Write back 20246684Stjones1@inf.ed.ac.uk bufp.copyOut(tc->getMemProxy()); 20252553SN/A 202611910SBrandon.Potter@amd.com // Return clock ticks since system boot 202711910SBrandon.Potter@amd.com return clocks; 202811910SBrandon.Potter@amd.com} 202911910SBrandon.Potter@amd.com 203011910SBrandon.Potter@amd.com/// Target time() function. 203111910SBrandon.Potter@amd.comtemplate <class OS> 203211910SBrandon.Potter@amd.comSyscallReturn 203311910SBrandon.Potter@amd.comtimeFunc(SyscallDesc *desc, int callnum, Process *process, ThreadContext *tc) 203411910SBrandon.Potter@amd.com{ 203511910SBrandon.Potter@amd.com typename OS::time_t sec, usec; 203611910SBrandon.Potter@amd.com getElapsedTimeMicro(sec, usec); 203711910SBrandon.Potter@amd.com sec += seconds_since_epoch; 203811910SBrandon.Potter@amd.com 203911910SBrandon.Potter@amd.com int index = 0; 204011910SBrandon.Potter@amd.com Addr taddr = (Addr)process->getSyscallArg(tc, index); 204111910SBrandon.Potter@amd.com if (taddr != 0) { 204211910SBrandon.Potter@amd.com typename OS::time_t t = sec; 204311910SBrandon.Potter@amd.com t = TheISA::htog(t); 204411910SBrandon.Potter@amd.com SETranslatingPortProxy &p = tc->getMemProxy(); 204511910SBrandon.Potter@amd.com p.writeBlob(taddr, (uint8_t*)&t, (int)sizeof(typename OS::time_t)); 204611910SBrandon.Potter@amd.com } 204711910SBrandon.Potter@amd.com return sec; 204811910SBrandon.Potter@amd.com} 204911910SBrandon.Potter@amd.com 205011910SBrandon.Potter@amd.comtemplate <class OS> 205111910SBrandon.Potter@amd.comSyscallReturn 205211910SBrandon.Potter@amd.comtgkillFunc(SyscallDesc *desc, int num, Process *process, ThreadContext *tc) 205311910SBrandon.Potter@amd.com{ 205411910SBrandon.Potter@amd.com int index = 0; 205511910SBrandon.Potter@amd.com int tgid = process->getSyscallArg(tc, index); 205611910SBrandon.Potter@amd.com int tid = process->getSyscallArg(tc, index); 205711910SBrandon.Potter@amd.com int sig = process->getSyscallArg(tc, index); 205811910SBrandon.Potter@amd.com 205911910SBrandon.Potter@amd.com /** 206011910SBrandon.Potter@amd.com * This system call is intended to allow killing a specific thread 206111910SBrandon.Potter@amd.com * within an arbitrary thread group if sanctioned with permission checks. 206211910SBrandon.Potter@amd.com * It's usually true that threads share the termination signal as pointed 206311910SBrandon.Potter@amd.com * out by the pthread_kill man page and this seems to be the intended 206411910SBrandon.Potter@amd.com * usage. Due to this being an emulated environment, assume the following: 206511910SBrandon.Potter@amd.com * Threads are allowed to call tgkill because the EUID for all threads 206611910SBrandon.Potter@amd.com * should be the same. There is no signal handling mechanism for kernel 206711910SBrandon.Potter@amd.com * registration of signal handlers since signals are poorly supported in 206811910SBrandon.Potter@amd.com * emulation mode. Since signal handlers cannot be registered, all 206911910SBrandon.Potter@amd.com * threads within in a thread group must share the termination signal. 207011910SBrandon.Potter@amd.com * We never exhaust PIDs so there's no chance of finding the wrong one 207111910SBrandon.Potter@amd.com * due to PID rollover. 207211910SBrandon.Potter@amd.com */ 207311910SBrandon.Potter@amd.com 207411910SBrandon.Potter@amd.com System *sys = tc->getSystemPtr(); 20752553SN/A Process *tgt_proc = nullptr; 20761354SN/A for (int i = 0; i < sys->numContexts(); i++) { 2077 Process *temp = sys->threadContexts[i]->getProcessPtr(); 2078 if (temp->pid() == tid) { 2079 tgt_proc = temp; 2080 break; 2081 } 2082 } 2083 2084 if (sig != 0 || sig != OS::TGT_SIGABRT) 2085 return -EINVAL; 2086 2087 if (tgt_proc == nullptr) 2088 return -ESRCH; 2089 2090 if (tgid != -1 && tgt_proc->tgid() != tgid) 2091 return -ESRCH; 2092 2093 if (sig == OS::TGT_SIGABRT) 2094 exitGroupFunc(desc, 252, process, tc); 2095 2096 return 0; 2097} 2098 2099 2100#endif // __SIM_SYSCALL_EMUL_HH__ 2101