syscall_emul.hh revision 12416
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 9611886Sbrandon.potter@amd.com#include "arch/utility.hh" 9711800Sbrandon.potter@amd.com#include "base/intmath.hh" 9811392Sbrandon.potter@amd.com#include "base/loader/object_file.hh" 9912334Sgabeblack@google.com#include "base/logging.hh" 1001354SN/A#include "base/trace.hh" 1016216Snate@binkert.org#include "base/types.hh" 1026658Snate@binkert.org#include "config/the_isa.hh" 1032474SN/A#include "cpu/base.hh" 1042680Sktlim@umich.edu#include "cpu/thread_context.hh" 1058229Snate@binkert.org#include "mem/page_table.hh" 10611886Sbrandon.potter@amd.com#include "params/Process.hh" 10710496Ssteve.reinhardt@amd.com#include "sim/emul_driver.hh" 10811911SBrandon.Potter@amd.com#include "sim/futex_map.hh" 1098229Snate@binkert.org#include "sim/process.hh" 11011794Sbrandon.potter@amd.com#include "sim/syscall_debug_macros.hh" 11111886Sbrandon.potter@amd.com#include "sim/syscall_desc.hh" 11210497Ssteve.reinhardt@amd.com#include "sim/syscall_emul_buf.hh" 11311794Sbrandon.potter@amd.com#include "sim/syscall_return.hh" 114360SN/A 115360SN/A////////////////////////////////////////////////////////////////////// 116360SN/A// 117360SN/A// The following emulation functions are generic enough that they 118360SN/A// don't need to be recompiled for different emulated OS's. They are 119360SN/A// defined in sim/syscall_emul.cc. 120360SN/A// 121360SN/A////////////////////////////////////////////////////////////////////// 122360SN/A 123360SN/A 124378SN/A/// Handler for unimplemented syscalls that we haven't thought about. 1251706SN/ASyscallReturn unimplementedFunc(SyscallDesc *desc, int num, 12611851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 127378SN/A 128378SN/A/// Handler for unimplemented syscalls that we never intend to 129378SN/A/// implement (signal handling, etc.) and should not affect the correct 130378SN/A/// behavior of the program. Print a warning only if the appropriate 131378SN/A/// trace flag is enabled. Return success to the target program. 1321706SN/ASyscallReturn ignoreFunc(SyscallDesc *desc, int num, 13311851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 134360SN/A 13511760Sbrandon.potter@amd.com// Target fallocateFunc() handler. 13611760Sbrandon.potter@amd.comSyscallReturn fallocateFunc(SyscallDesc *desc, int num, 13711851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 13811760Sbrandon.potter@amd.com 1396109Ssanchezd@stanford.edu/// Target exit() handler: terminate current context. 1401706SN/ASyscallReturn exitFunc(SyscallDesc *desc, int num, 14111851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 142378SN/A 1436109Ssanchezd@stanford.edu/// Target exit_group() handler: terminate simulation. (exit all threads) 1446109Ssanchezd@stanford.eduSyscallReturn exitGroupFunc(SyscallDesc *desc, int num, 14511851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 1466109Ssanchezd@stanford.edu 14711886Sbrandon.potter@amd.com/// Target set_tid_address() handler. 14811886Sbrandon.potter@amd.comSyscallReturn setTidAddressFunc(SyscallDesc *desc, int num, 14911886Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 15011886Sbrandon.potter@amd.com 151378SN/A/// Target getpagesize() handler. 1521706SN/ASyscallReturn getpagesizeFunc(SyscallDesc *desc, int num, 15311851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 154378SN/A 1555748SSteve.Reinhardt@amd.com/// Target brk() handler: set brk address. 1565748SSteve.Reinhardt@amd.comSyscallReturn brkFunc(SyscallDesc *desc, int num, 15711851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 158378SN/A 159378SN/A/// Target close() handler. 1601706SN/ASyscallReturn closeFunc(SyscallDesc *desc, int num, 16111851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 162378SN/A 16311886Sbrandon.potter@amd.com// Target read() handler. 1641706SN/ASyscallReturn readFunc(SyscallDesc *desc, int num, 16511851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 166378SN/A 167378SN/A/// Target write() handler. 1681706SN/ASyscallReturn writeFunc(SyscallDesc *desc, int num, 16911851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 170378SN/A 171378SN/A/// Target lseek() handler. 1721706SN/ASyscallReturn lseekFunc(SyscallDesc *desc, int num, 17311851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 174378SN/A 1754118Sgblack@eecs.umich.edu/// Target _llseek() handler. 1764118Sgblack@eecs.umich.eduSyscallReturn _llseekFunc(SyscallDesc *desc, int num, 17711851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 1784118Sgblack@eecs.umich.edu 179378SN/A/// Target munmap() handler. 1801706SN/ASyscallReturn munmapFunc(SyscallDesc *desc, int num, 18111851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 182378SN/A 183378SN/A/// Target gethostname() handler. 1841706SN/ASyscallReturn gethostnameFunc(SyscallDesc *desc, int num, 18511851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 186360SN/A 1875513SMichael.Adler@intel.com/// Target getcwd() handler. 1885513SMichael.Adler@intel.comSyscallReturn getcwdFunc(SyscallDesc *desc, int num, 18911851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 1905513SMichael.Adler@intel.com 19110203SAli.Saidi@ARM.com/// Target readlink() handler. 19210203SAli.Saidi@ARM.comSyscallReturn readlinkFunc(SyscallDesc *desc, int num, 19311851Sbrandon.potter@amd.com Process *p, ThreadContext *tc, 19410203SAli.Saidi@ARM.com int index = 0); 1955513SMichael.Adler@intel.comSyscallReturn readlinkFunc(SyscallDesc *desc, int num, 19611851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 1975513SMichael.Adler@intel.com 198511SN/A/// Target unlink() handler. 19910633Smichaelupton@gmail.comSyscallReturn unlinkHelper(SyscallDesc *desc, int num, 20011851Sbrandon.potter@amd.com Process *p, ThreadContext *tc, 20110633Smichaelupton@gmail.com int index); 2021706SN/ASyscallReturn unlinkFunc(SyscallDesc *desc, int num, 20311851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 204511SN/A 2055513SMichael.Adler@intel.com/// Target mkdir() handler. 2065513SMichael.Adler@intel.comSyscallReturn mkdirFunc(SyscallDesc *desc, int num, 20711851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2085513SMichael.Adler@intel.com 209511SN/A/// Target rename() handler. 2101706SN/ASyscallReturn renameFunc(SyscallDesc *desc, int num, 21111851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2121706SN/A 2131706SN/A 2141706SN/A/// Target truncate() handler. 2151706SN/ASyscallReturn truncateFunc(SyscallDesc *desc, int num, 21611851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2171706SN/A 2181706SN/A 2191706SN/A/// Target ftruncate() handler. 2201706SN/ASyscallReturn ftruncateFunc(SyscallDesc *desc, int num, 22111851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2221706SN/A 223511SN/A 2246703Svince@csl.cornell.edu/// Target truncate64() handler. 2256703Svince@csl.cornell.eduSyscallReturn truncate64Func(SyscallDesc *desc, int num, 22611851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2276703Svince@csl.cornell.edu 2286685Stjones1@inf.ed.ac.uk/// Target ftruncate64() handler. 2296685Stjones1@inf.ed.ac.ukSyscallReturn ftruncate64Func(SyscallDesc *desc, int num, 23011851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2316685Stjones1@inf.ed.ac.uk 2326685Stjones1@inf.ed.ac.uk 2335513SMichael.Adler@intel.com/// Target umask() handler. 2345513SMichael.Adler@intel.comSyscallReturn umaskFunc(SyscallDesc *desc, int num, 23511851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2365513SMichael.Adler@intel.com 23711885Sbrandon.potter@amd.com/// Target gettid() handler. 23811885Sbrandon.potter@amd.comSyscallReturn gettidFunc(SyscallDesc *desc, int num, 23911885Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2405513SMichael.Adler@intel.com 2411999SN/A/// Target chown() handler. 2421999SN/ASyscallReturn chownFunc(SyscallDesc *desc, int num, 24311851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2441999SN/A 24511885Sbrandon.potter@amd.com/// Target setpgid() handler. 24611885Sbrandon.potter@amd.comSyscallReturn setpgidFunc(SyscallDesc *desc, int num, 24711885Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2481999SN/A 2491999SN/A/// Target fchown() handler. 2501999SN/ASyscallReturn fchownFunc(SyscallDesc *desc, int num, 25111851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2521999SN/A 2533079Sstever@eecs.umich.edu/// Target dup() handler. 2543079Sstever@eecs.umich.eduSyscallReturn dupFunc(SyscallDesc *desc, int num, 25511851Sbrandon.potter@amd.com Process *process, ThreadContext *tc); 2563079Sstever@eecs.umich.edu 25711908SBrandon.Potter@amd.com/// Target dup2() handler. 25811908SBrandon.Potter@amd.comSyscallReturn dup2Func(SyscallDesc *desc, int num, 25911908SBrandon.Potter@amd.com Process *process, ThreadContext *tc); 26011908SBrandon.Potter@amd.com 26111875Sbrandon.potter@amd.com/// Target fcntl() handler. 2622093SN/ASyscallReturn fcntlFunc(SyscallDesc *desc, int num, 26311851Sbrandon.potter@amd.com Process *process, ThreadContext *tc); 2642093SN/A 2652687Sksewell@umich.edu/// Target fcntl64() handler. 2662687Sksewell@umich.eduSyscallReturn fcntl64Func(SyscallDesc *desc, int num, 26711851Sbrandon.potter@amd.com Process *process, ThreadContext *tc); 2682687Sksewell@umich.edu 2692238SN/A/// Target setuid() handler. 2702238SN/ASyscallReturn setuidFunc(SyscallDesc *desc, int num, 27111851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2722238SN/A 27311908SBrandon.Potter@amd.com/// Target pipe() handler. 27411908SBrandon.Potter@amd.comSyscallReturn pipeFunc(SyscallDesc *desc, int num, 27511908SBrandon.Potter@amd.com Process *p, ThreadContext *tc); 27611908SBrandon.Potter@amd.com 27711908SBrandon.Potter@amd.com/// Internal pipe() handler. 27811908SBrandon.Potter@amd.comSyscallReturn pipeImpl(SyscallDesc *desc, int num, Process *p, 27911908SBrandon.Potter@amd.com ThreadContext *tc, bool pseudoPipe); 28011908SBrandon.Potter@amd.com 2812238SN/A/// Target getpid() handler. 2822238SN/ASyscallReturn getpidFunc(SyscallDesc *desc, int num, 28311851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2842238SN/A 2852238SN/A/// Target getuid() handler. 2862238SN/ASyscallReturn getuidFunc(SyscallDesc *desc, int num, 28711851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2882238SN/A 2892238SN/A/// Target getgid() handler. 2902238SN/ASyscallReturn getgidFunc(SyscallDesc *desc, int num, 29111851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2922238SN/A 2932238SN/A/// Target getppid() handler. 2942238SN/ASyscallReturn getppidFunc(SyscallDesc *desc, int num, 29511851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2962238SN/A 2972238SN/A/// Target geteuid() handler. 2982238SN/ASyscallReturn geteuidFunc(SyscallDesc *desc, int num, 29911851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3002238SN/A 3012238SN/A/// Target getegid() handler. 3022238SN/ASyscallReturn getegidFunc(SyscallDesc *desc, int num, 30311851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3042238SN/A 3059455Smitch.hayenga+gem5@gmail.com/// Target access() handler 3069455Smitch.hayenga+gem5@gmail.comSyscallReturn accessFunc(SyscallDesc *desc, int num, 30711851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 30810203SAli.Saidi@ARM.comSyscallReturn accessFunc(SyscallDesc *desc, int num, 30911851Sbrandon.potter@amd.com Process *p, ThreadContext *tc, 31011851Sbrandon.potter@amd.com int index); 3119455Smitch.hayenga+gem5@gmail.com 3129112Smarc.orr@gmail.com/// Futex system call 31311906SBrandon.Potter@amd.com/// Implemented by Daniel Sanchez 31411906SBrandon.Potter@amd.com/// Used by printf's in multi-threaded apps 3159112Smarc.orr@gmail.comtemplate <class OS> 3169112Smarc.orr@gmail.comSyscallReturn 31711851Sbrandon.potter@amd.comfutexFunc(SyscallDesc *desc, int callnum, Process *process, 3189112Smarc.orr@gmail.com ThreadContext *tc) 3199112Smarc.orr@gmail.com{ 32011911SBrandon.Potter@amd.com using namespace std; 3219112Smarc.orr@gmail.com 32211911SBrandon.Potter@amd.com int index = 0; 32311911SBrandon.Potter@amd.com Addr uaddr = process->getSyscallArg(tc, index); 32411911SBrandon.Potter@amd.com int op = process->getSyscallArg(tc, index); 32511911SBrandon.Potter@amd.com int val = process->getSyscallArg(tc, index); 3269112Smarc.orr@gmail.com 32711911SBrandon.Potter@amd.com /* 32811911SBrandon.Potter@amd.com * Unsupported option that does not affect the correctness of the 32911911SBrandon.Potter@amd.com * application. This is a performance optimization utilized by Linux. 33011911SBrandon.Potter@amd.com */ 3319238Slluc.alvarez@bsc.es op &= ~OS::TGT_FUTEX_PRIVATE_FLAG; 3329112Smarc.orr@gmail.com 33311911SBrandon.Potter@amd.com FutexMap &futex_map = tc->getSystemPtr()->futexMap; 3349112Smarc.orr@gmail.com 33511911SBrandon.Potter@amd.com if (OS::TGT_FUTEX_WAIT == op) { 33611911SBrandon.Potter@amd.com // Ensure futex system call accessed atomically. 33711911SBrandon.Potter@amd.com BufferArg buf(uaddr, sizeof(int)); 33811911SBrandon.Potter@amd.com buf.copyIn(tc->getMemProxy()); 33911911SBrandon.Potter@amd.com int mem_val = *(int*)buf.bufferPtr(); 3409112Smarc.orr@gmail.com 34111911SBrandon.Potter@amd.com /* 34211911SBrandon.Potter@amd.com * The value in memory at uaddr is not equal with the expected val 34311911SBrandon.Potter@amd.com * (a different thread must have changed it before the system call was 34411911SBrandon.Potter@amd.com * invoked). In this case, we need to throw an error. 34511911SBrandon.Potter@amd.com */ 34611911SBrandon.Potter@amd.com if (val != mem_val) 3479112Smarc.orr@gmail.com return -OS::TGT_EWOULDBLOCK; 3489112Smarc.orr@gmail.com 34911911SBrandon.Potter@amd.com futex_map.suspend(uaddr, process->tgid(), tc); 35011911SBrandon.Potter@amd.com 3519112Smarc.orr@gmail.com return 0; 35211911SBrandon.Potter@amd.com } else if (OS::TGT_FUTEX_WAKE == op) { 35311911SBrandon.Potter@amd.com return futex_map.wakeup(uaddr, process->tgid(), val); 3549112Smarc.orr@gmail.com } 3559112Smarc.orr@gmail.com 35611911SBrandon.Potter@amd.com warn("futex: op %d not implemented; ignoring.", op); 35711911SBrandon.Potter@amd.com return -ENOSYS; 3589112Smarc.orr@gmail.com} 3599112Smarc.orr@gmail.com 3602238SN/A 3612238SN/A/// Pseudo Funcs - These functions use a different return convension, 3622238SN/A/// returning a second value in a register other than the normal return register 3632238SN/ASyscallReturn pipePseudoFunc(SyscallDesc *desc, int num, 36411851Sbrandon.potter@amd.com Process *process, ThreadContext *tc); 3652238SN/A 3662238SN/A/// Target getpidPseudo() handler. 3672238SN/ASyscallReturn getpidPseudoFunc(SyscallDesc *desc, int num, 36811851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3692238SN/A 3702238SN/A/// Target getuidPseudo() handler. 3712238SN/ASyscallReturn getuidPseudoFunc(SyscallDesc *desc, int num, 37211851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3732238SN/A 3742238SN/A/// Target getgidPseudo() handler. 3752238SN/ASyscallReturn getgidPseudoFunc(SyscallDesc *desc, int num, 37611851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3772238SN/A 3782238SN/A 3791354SN/A/// A readable name for 1,000,000, for converting microseconds to seconds. 3801354SN/Aconst int one_million = 1000000; 38110796Sbrandon.potter@amd.com/// A readable name for 1,000,000,000, for converting nanoseconds to seconds. 38210796Sbrandon.potter@amd.comconst int one_billion = 1000000000; 3831354SN/A 3841354SN/A/// Approximate seconds since the epoch (1/1/1970). About a billion, 3851354SN/A/// by my reckoning. We want to keep this a constant (not use the 3861354SN/A/// real-world time) to keep simulations repeatable. 3871354SN/Aconst unsigned seconds_since_epoch = 1000000000; 3881354SN/A 3891354SN/A/// Helper function to convert current elapsed time to seconds and 3901354SN/A/// microseconds. 3911354SN/Atemplate <class T1, class T2> 3921354SN/Avoid 39310796Sbrandon.potter@amd.comgetElapsedTimeMicro(T1 &sec, T2 &usec) 3941354SN/A{ 39510796Sbrandon.potter@amd.com uint64_t elapsed_usecs = curTick() / SimClock::Int::us; 3961354SN/A sec = elapsed_usecs / one_million; 3971354SN/A usec = elapsed_usecs % one_million; 3981354SN/A} 3991354SN/A 40010796Sbrandon.potter@amd.com/// Helper function to convert current elapsed time to seconds and 40110796Sbrandon.potter@amd.com/// nanoseconds. 40210796Sbrandon.potter@amd.comtemplate <class T1, class T2> 40310796Sbrandon.potter@amd.comvoid 40410796Sbrandon.potter@amd.comgetElapsedTimeNano(T1 &sec, T2 &nsec) 40510796Sbrandon.potter@amd.com{ 40610796Sbrandon.potter@amd.com uint64_t elapsed_nsecs = curTick() / SimClock::Int::ns; 40710796Sbrandon.potter@amd.com sec = elapsed_nsecs / one_billion; 40810796Sbrandon.potter@amd.com nsec = elapsed_nsecs % one_billion; 40910796Sbrandon.potter@amd.com} 41010796Sbrandon.potter@amd.com 411360SN/A////////////////////////////////////////////////////////////////////// 412360SN/A// 413360SN/A// The following emulation functions are generic, but need to be 414360SN/A// templated to account for differences in types, constants, etc. 415360SN/A// 416360SN/A////////////////////////////////////////////////////////////////////// 417360SN/A 41811759Sbrandon.potter@amd.com typedef struct statfs hst_statfs; 4193113Sgblack@eecs.umich.edu#if NO_STAT64 4203113Sgblack@eecs.umich.edu typedef struct stat hst_stat; 4213113Sgblack@eecs.umich.edu typedef struct stat hst_stat64; 4223113Sgblack@eecs.umich.edu#else 4233113Sgblack@eecs.umich.edu typedef struct stat hst_stat; 4243113Sgblack@eecs.umich.edu typedef struct stat64 hst_stat64; 4253113Sgblack@eecs.umich.edu#endif 4263113Sgblack@eecs.umich.edu 4273113Sgblack@eecs.umich.edu//// Helper function to convert a host stat buffer to a target stat 4283113Sgblack@eecs.umich.edu//// buffer. Also copies the target buffer out to the simulated 4293113Sgblack@eecs.umich.edu//// memory space. Used by stat(), fstat(), and lstat(). 4303113Sgblack@eecs.umich.edu 4313113Sgblack@eecs.umich.edutemplate <typename target_stat, typename host_stat> 43212032Sandreas.sandberg@arm.comvoid 4333113Sgblack@eecs.umich.educonvertStatBuf(target_stat &tgt, host_stat *host, bool fakeTTY = false) 4343113Sgblack@eecs.umich.edu{ 4354189Sgblack@eecs.umich.edu using namespace TheISA; 4364189Sgblack@eecs.umich.edu 4373113Sgblack@eecs.umich.edu if (fakeTTY) 4383113Sgblack@eecs.umich.edu tgt->st_dev = 0xA; 4393113Sgblack@eecs.umich.edu else 4403113Sgblack@eecs.umich.edu tgt->st_dev = host->st_dev; 4418737Skoansin.tan@gmail.com tgt->st_dev = TheISA::htog(tgt->st_dev); 4423113Sgblack@eecs.umich.edu tgt->st_ino = host->st_ino; 4438737Skoansin.tan@gmail.com tgt->st_ino = TheISA::htog(tgt->st_ino); 4443277Sgblack@eecs.umich.edu tgt->st_mode = host->st_mode; 4455515SMichael.Adler@intel.com if (fakeTTY) { 4465515SMichael.Adler@intel.com // Claim to be a character device 4475515SMichael.Adler@intel.com tgt->st_mode &= ~S_IFMT; // Clear S_IFMT 4485515SMichael.Adler@intel.com tgt->st_mode |= S_IFCHR; // Set S_IFCHR 4495515SMichael.Adler@intel.com } 4508737Skoansin.tan@gmail.com tgt->st_mode = TheISA::htog(tgt->st_mode); 4513277Sgblack@eecs.umich.edu tgt->st_nlink = host->st_nlink; 4528737Skoansin.tan@gmail.com tgt->st_nlink = TheISA::htog(tgt->st_nlink); 4533277Sgblack@eecs.umich.edu tgt->st_uid = host->st_uid; 4548737Skoansin.tan@gmail.com tgt->st_uid = TheISA::htog(tgt->st_uid); 4553277Sgblack@eecs.umich.edu tgt->st_gid = host->st_gid; 4568737Skoansin.tan@gmail.com tgt->st_gid = TheISA::htog(tgt->st_gid); 4573113Sgblack@eecs.umich.edu if (fakeTTY) 4583113Sgblack@eecs.umich.edu tgt->st_rdev = 0x880d; 4593113Sgblack@eecs.umich.edu else 4603113Sgblack@eecs.umich.edu tgt->st_rdev = host->st_rdev; 4618737Skoansin.tan@gmail.com tgt->st_rdev = TheISA::htog(tgt->st_rdev); 4623113Sgblack@eecs.umich.edu tgt->st_size = host->st_size; 4638737Skoansin.tan@gmail.com tgt->st_size = TheISA::htog(tgt->st_size); 4643114Sgblack@eecs.umich.edu tgt->st_atimeX = host->st_atime; 4658737Skoansin.tan@gmail.com tgt->st_atimeX = TheISA::htog(tgt->st_atimeX); 4663114Sgblack@eecs.umich.edu tgt->st_mtimeX = host->st_mtime; 4678737Skoansin.tan@gmail.com tgt->st_mtimeX = TheISA::htog(tgt->st_mtimeX); 4683114Sgblack@eecs.umich.edu tgt->st_ctimeX = host->st_ctime; 4698737Skoansin.tan@gmail.com tgt->st_ctimeX = TheISA::htog(tgt->st_ctimeX); 47011906SBrandon.Potter@amd.com // Force the block size to be 8KB. This helps to ensure buffered io works 4714061Sgblack@eecs.umich.edu // consistently across different hosts. 4724061Sgblack@eecs.umich.edu tgt->st_blksize = 0x2000; 4738737Skoansin.tan@gmail.com tgt->st_blksize = TheISA::htog(tgt->st_blksize); 4743113Sgblack@eecs.umich.edu tgt->st_blocks = host->st_blocks; 4758737Skoansin.tan@gmail.com tgt->st_blocks = TheISA::htog(tgt->st_blocks); 4763113Sgblack@eecs.umich.edu} 4773113Sgblack@eecs.umich.edu 4783113Sgblack@eecs.umich.edu// Same for stat64 4793113Sgblack@eecs.umich.edu 4803113Sgblack@eecs.umich.edutemplate <typename target_stat, typename host_stat64> 48112032Sandreas.sandberg@arm.comvoid 4823113Sgblack@eecs.umich.educonvertStat64Buf(target_stat &tgt, host_stat64 *host, bool fakeTTY = false) 4833113Sgblack@eecs.umich.edu{ 4844189Sgblack@eecs.umich.edu using namespace TheISA; 4854189Sgblack@eecs.umich.edu 4863113Sgblack@eecs.umich.edu convertStatBuf<target_stat, host_stat64>(tgt, host, fakeTTY); 4873113Sgblack@eecs.umich.edu#if defined(STAT_HAVE_NSEC) 4883113Sgblack@eecs.umich.edu tgt->st_atime_nsec = host->st_atime_nsec; 4898737Skoansin.tan@gmail.com tgt->st_atime_nsec = TheISA::htog(tgt->st_atime_nsec); 4903113Sgblack@eecs.umich.edu tgt->st_mtime_nsec = host->st_mtime_nsec; 4918737Skoansin.tan@gmail.com tgt->st_mtime_nsec = TheISA::htog(tgt->st_mtime_nsec); 4923113Sgblack@eecs.umich.edu tgt->st_ctime_nsec = host->st_ctime_nsec; 4938737Skoansin.tan@gmail.com tgt->st_ctime_nsec = TheISA::htog(tgt->st_ctime_nsec); 4943113Sgblack@eecs.umich.edu#else 4953113Sgblack@eecs.umich.edu tgt->st_atime_nsec = 0; 4963113Sgblack@eecs.umich.edu tgt->st_mtime_nsec = 0; 4973113Sgblack@eecs.umich.edu tgt->st_ctime_nsec = 0; 4983113Sgblack@eecs.umich.edu#endif 4993113Sgblack@eecs.umich.edu} 5003113Sgblack@eecs.umich.edu 50111906SBrandon.Potter@amd.com// Here are a couple of convenience functions 5023113Sgblack@eecs.umich.edutemplate<class OS> 50312032Sandreas.sandberg@arm.comvoid 5048852Sandreas.hansson@arm.comcopyOutStatBuf(SETranslatingPortProxy &mem, Addr addr, 50511906SBrandon.Potter@amd.com hst_stat *host, bool fakeTTY = false) 5063113Sgblack@eecs.umich.edu{ 5073113Sgblack@eecs.umich.edu typedef TypedBufferArg<typename OS::tgt_stat> tgt_stat_buf; 5083113Sgblack@eecs.umich.edu tgt_stat_buf tgt(addr); 5093113Sgblack@eecs.umich.edu convertStatBuf<tgt_stat_buf, hst_stat>(tgt, host, fakeTTY); 5103113Sgblack@eecs.umich.edu tgt.copyOut(mem); 5113113Sgblack@eecs.umich.edu} 5123113Sgblack@eecs.umich.edu 5133113Sgblack@eecs.umich.edutemplate<class OS> 51412032Sandreas.sandberg@arm.comvoid 5158852Sandreas.hansson@arm.comcopyOutStat64Buf(SETranslatingPortProxy &mem, Addr addr, 51611906SBrandon.Potter@amd.com hst_stat64 *host, bool fakeTTY = false) 5173113Sgblack@eecs.umich.edu{ 5183113Sgblack@eecs.umich.edu typedef TypedBufferArg<typename OS::tgt_stat64> tgt_stat_buf; 5193113Sgblack@eecs.umich.edu tgt_stat_buf tgt(addr); 5206686Stjones1@inf.ed.ac.uk convertStat64Buf<tgt_stat_buf, hst_stat64>(tgt, host, fakeTTY); 5213113Sgblack@eecs.umich.edu tgt.copyOut(mem); 5223113Sgblack@eecs.umich.edu} 5233113Sgblack@eecs.umich.edu 52411759Sbrandon.potter@amd.comtemplate <class OS> 52512032Sandreas.sandberg@arm.comvoid 52611759Sbrandon.potter@amd.comcopyOutStatfsBuf(SETranslatingPortProxy &mem, Addr addr, 52711759Sbrandon.potter@amd.com hst_statfs *host) 52811759Sbrandon.potter@amd.com{ 52911759Sbrandon.potter@amd.com TypedBufferArg<typename OS::tgt_statfs> tgt(addr); 53011759Sbrandon.potter@amd.com 53111812Sbaz21@cam.ac.uk tgt->f_type = TheISA::htog(host->f_type); 53211812Sbaz21@cam.ac.uk#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) 53311812Sbaz21@cam.ac.uk tgt->f_bsize = TheISA::htog(host->f_iosize); 53411759Sbrandon.potter@amd.com#else 53511812Sbaz21@cam.ac.uk tgt->f_bsize = TheISA::htog(host->f_bsize); 53611759Sbrandon.potter@amd.com#endif 53711759Sbrandon.potter@amd.com tgt->f_blocks = TheISA::htog(host->f_blocks); 53811759Sbrandon.potter@amd.com tgt->f_bfree = TheISA::htog(host->f_bfree); 53911759Sbrandon.potter@amd.com tgt->f_bavail = TheISA::htog(host->f_bavail); 54011759Sbrandon.potter@amd.com tgt->f_files = TheISA::htog(host->f_files); 54111759Sbrandon.potter@amd.com tgt->f_ffree = TheISA::htog(host->f_ffree); 54211759Sbrandon.potter@amd.com memcpy(&tgt->f_fsid, &host->f_fsid, sizeof(host->f_fsid)); 54311812Sbaz21@cam.ac.uk#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) 54411812Sbaz21@cam.ac.uk tgt->f_namelen = TheISA::htog(host->f_namemax); 54511812Sbaz21@cam.ac.uk tgt->f_frsize = TheISA::htog(host->f_bsize); 54611812Sbaz21@cam.ac.uk#elif defined(__APPLE__) 54711812Sbaz21@cam.ac.uk tgt->f_namelen = 0; 54811812Sbaz21@cam.ac.uk tgt->f_frsize = 0; 54911812Sbaz21@cam.ac.uk#else 55011759Sbrandon.potter@amd.com tgt->f_namelen = TheISA::htog(host->f_namelen); 55111759Sbrandon.potter@amd.com tgt->f_frsize = TheISA::htog(host->f_frsize); 55211812Sbaz21@cam.ac.uk#endif 55311812Sbaz21@cam.ac.uk#if defined(__linux__) 55411759Sbrandon.potter@amd.com memcpy(&tgt->f_spare, &host->f_spare, sizeof(host->f_spare)); 55511812Sbaz21@cam.ac.uk#else 55611812Sbaz21@cam.ac.uk /* 55711812Sbaz21@cam.ac.uk * The fields are different sizes per OS. Don't bother with 55811812Sbaz21@cam.ac.uk * f_spare or f_reserved on non-Linux for now. 55911812Sbaz21@cam.ac.uk */ 56011812Sbaz21@cam.ac.uk memset(&tgt->f_spare, 0, sizeof(tgt->f_spare)); 56111812Sbaz21@cam.ac.uk#endif 56211759Sbrandon.potter@amd.com 56311759Sbrandon.potter@amd.com tgt.copyOut(mem); 56411759Sbrandon.potter@amd.com} 56511759Sbrandon.potter@amd.com 566378SN/A/// Target ioctl() handler. For the most part, programs call ioctl() 567378SN/A/// only to find out if their stdout is a tty, to determine whether to 5689141Smarc.orr@gmail.com/// do line or block buffering. We always claim that output fds are 5699141Smarc.orr@gmail.com/// not TTYs to provide repeatable results. 570360SN/Atemplate <class OS> 5711450SN/ASyscallReturn 57211856Sbrandon.potter@amd.comioctlFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 573360SN/A{ 5746701Sgblack@eecs.umich.edu int index = 0; 57511856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 57611856Sbrandon.potter@amd.com unsigned req = p->getSyscallArg(tc, index); 577360SN/A 57810930Sbrandon.potter@amd.com DPRINTF(SyscallVerbose, "ioctl(%d, 0x%x, ...)\n", tgt_fd, req); 579360SN/A 58011856Sbrandon.potter@amd.com if (OS::isTtyReq(req)) 58111856Sbrandon.potter@amd.com return -ENOTTY; 58210496Ssteve.reinhardt@amd.com 58311856Sbrandon.potter@amd.com auto dfdp = std::dynamic_pointer_cast<DeviceFDEntry>((*p->fds)[tgt_fd]); 58411856Sbrandon.potter@amd.com if (!dfdp) 5851458SN/A return -EBADF; 586360SN/A 58711856Sbrandon.potter@amd.com /** 58811856Sbrandon.potter@amd.com * If the driver is valid, issue the ioctl through it. Otherwise, 58911856Sbrandon.potter@amd.com * there's an implicit assumption that the device is a TTY type and we 59011856Sbrandon.potter@amd.com * return that we do not have a valid TTY. 59111856Sbrandon.potter@amd.com */ 59211856Sbrandon.potter@amd.com EmulatedDriver *emul_driver = dfdp->getDriver(); 59311856Sbrandon.potter@amd.com if (emul_driver) 59411856Sbrandon.potter@amd.com return emul_driver->ioctl(p, tc, req); 59510496Ssteve.reinhardt@amd.com 59611856Sbrandon.potter@amd.com /** 59711856Sbrandon.potter@amd.com * For lack of a better return code, return ENOTTY. Ideally, we should 59811856Sbrandon.potter@amd.com * return something better here, but at least we issue the warning. 59911856Sbrandon.potter@amd.com */ 60011856Sbrandon.potter@amd.com warn("Unsupported ioctl call (return ENOTTY): ioctl(%d, 0x%x, ...) @ \n", 60110930Sbrandon.potter@amd.com tgt_fd, req, tc->pcState()); 6029141Smarc.orr@gmail.com return -ENOTTY; 603360SN/A} 604360SN/A 605360SN/Atemplate <class OS> 60611907SBrandon.Potter@amd.comSyscallReturn 60711907SBrandon.Potter@amd.comopenImpl(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc, 60811907SBrandon.Potter@amd.com bool isopenat) 609360SN/A{ 61011907SBrandon.Potter@amd.com int index = 0; 61111907SBrandon.Potter@amd.com int tgt_dirfd = -1; 61211907SBrandon.Potter@amd.com 61311907SBrandon.Potter@amd.com /** 61411907SBrandon.Potter@amd.com * If using the openat variant, read in the target directory file 61511907SBrandon.Potter@amd.com * descriptor from the simulated process. 61611907SBrandon.Potter@amd.com */ 61711907SBrandon.Potter@amd.com if (isopenat) 61811907SBrandon.Potter@amd.com tgt_dirfd = p->getSyscallArg(tc, index); 61911907SBrandon.Potter@amd.com 62011907SBrandon.Potter@amd.com /** 62111907SBrandon.Potter@amd.com * Retrieve the simulated process' memory proxy and then read in the path 62211907SBrandon.Potter@amd.com * string from that memory space into the host's working memory space. 62311907SBrandon.Potter@amd.com */ 624360SN/A std::string path; 62511907SBrandon.Potter@amd.com if (!tc->getMemProxy().tryReadString(path, p->getSyscallArg(tc, index))) 6261458SN/A return -EFAULT; 627360SN/A 62811907SBrandon.Potter@amd.com#ifdef __CYGWIN32__ 62911907SBrandon.Potter@amd.com int host_flags = O_BINARY; 63011907SBrandon.Potter@amd.com#else 63111907SBrandon.Potter@amd.com int host_flags = 0; 63211907SBrandon.Potter@amd.com#endif 63311907SBrandon.Potter@amd.com /** 63411907SBrandon.Potter@amd.com * Translate target flags into host flags. Flags exist which are not 63511907SBrandon.Potter@amd.com * ported between architectures which can cause check failures. 63611907SBrandon.Potter@amd.com */ 63711907SBrandon.Potter@amd.com int tgt_flags = p->getSyscallArg(tc, index); 638360SN/A for (int i = 0; i < OS::NUM_OPEN_FLAGS; i++) { 63911907SBrandon.Potter@amd.com if (tgt_flags & OS::openFlagTable[i].tgtFlag) { 64011907SBrandon.Potter@amd.com tgt_flags &= ~OS::openFlagTable[i].tgtFlag; 64111907SBrandon.Potter@amd.com host_flags |= OS::openFlagTable[i].hostFlag; 642360SN/A } 643360SN/A } 64411907SBrandon.Potter@amd.com if (tgt_flags) { 64511907SBrandon.Potter@amd.com warn("open%s: cannot decode flags 0x%x", 64611907SBrandon.Potter@amd.com isopenat ? "at" : "", tgt_flags); 64711907SBrandon.Potter@amd.com } 648360SN/A#ifdef __CYGWIN32__ 64911907SBrandon.Potter@amd.com host_flags |= O_BINARY; 650360SN/A#endif 651360SN/A 65211907SBrandon.Potter@amd.com int mode = p->getSyscallArg(tc, index); 6533669Sbinkertn@umich.edu 65411907SBrandon.Potter@amd.com /** 65511907SBrandon.Potter@amd.com * If the simulated process called open or openat with AT_FDCWD specified, 65611907SBrandon.Potter@amd.com * take the current working directory value which was passed into the 65711907SBrandon.Potter@amd.com * process class as a Python parameter and append the current path to 65811907SBrandon.Potter@amd.com * create a full path. 65911907SBrandon.Potter@amd.com * Otherwise, openat with a valid target directory file descriptor has 66011907SBrandon.Potter@amd.com * been called. If the path option, which was passed in as a parameter, 66111907SBrandon.Potter@amd.com * is not absolute, retrieve the directory file descriptor's path and 66211907SBrandon.Potter@amd.com * prepend it to the path passed in as a parameter. 66311907SBrandon.Potter@amd.com * In every case, we should have a full path (which is relevant to the 66411907SBrandon.Potter@amd.com * host) to work with after this block has been passed. 66511907SBrandon.Potter@amd.com */ 66611907SBrandon.Potter@amd.com if (!isopenat || (isopenat && tgt_dirfd == OS::TGT_AT_FDCWD)) { 66711907SBrandon.Potter@amd.com path = p->fullPath(path); 66811907SBrandon.Potter@amd.com } else if (!startswith(path, "/")) { 66911907SBrandon.Potter@amd.com std::shared_ptr<FDEntry> fdep = ((*p->fds)[tgt_dirfd]); 67011907SBrandon.Potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(fdep); 67111907SBrandon.Potter@amd.com if (!ffdp) 67211907SBrandon.Potter@amd.com return -EBADF; 67311907SBrandon.Potter@amd.com path.insert(0, ffdp->getFileName()); 67411907SBrandon.Potter@amd.com } 6751706SN/A 67611907SBrandon.Potter@amd.com /** 67711907SBrandon.Potter@amd.com * Since this is an emulated environment, we create pseudo file 67811907SBrandon.Potter@amd.com * descriptors for device requests that have been registered with 67911907SBrandon.Potter@amd.com * the process class through Python; this allows us to create a file 68011907SBrandon.Potter@amd.com * descriptor for subsequent ioctl or mmap calls. 68111907SBrandon.Potter@amd.com */ 68210496Ssteve.reinhardt@amd.com if (startswith(path, "/dev/")) { 68310496Ssteve.reinhardt@amd.com std::string filename = path.substr(strlen("/dev/")); 68411907SBrandon.Potter@amd.com EmulatedDriver *drv = p->findDriver(filename); 68511907SBrandon.Potter@amd.com if (drv) { 68611907SBrandon.Potter@amd.com DPRINTF_SYSCALL(Verbose, "open%s: passing call to " 68711907SBrandon.Potter@amd.com "driver open with path[%s]\n", 68811907SBrandon.Potter@amd.com isopenat ? "at" : "", path.c_str()); 68911907SBrandon.Potter@amd.com return drv->open(p, tc, mode, host_flags); 69010496Ssteve.reinhardt@amd.com } 69111907SBrandon.Potter@amd.com /** 69211907SBrandon.Potter@amd.com * Fall through here for pass through to host devices, such 69311907SBrandon.Potter@amd.com * as /dev/zero 69411907SBrandon.Potter@amd.com */ 69510496Ssteve.reinhardt@amd.com } 69610496Ssteve.reinhardt@amd.com 69711907SBrandon.Potter@amd.com /** 69811907SBrandon.Potter@amd.com * Some special paths and files cannot be called on the host and need 69911907SBrandon.Potter@amd.com * to be handled as special cases inside the simulator. 70011907SBrandon.Potter@amd.com * If the full path that was created above does not match any of the 70111907SBrandon.Potter@amd.com * special cases, pass it through to the open call on the host to let 70211907SBrandon.Potter@amd.com * the host open the file on our behalf. 70311907SBrandon.Potter@amd.com * If the host cannot open the file, return the host's error code back 70411907SBrandon.Potter@amd.com * through the system call to the simulated process. 70511907SBrandon.Potter@amd.com */ 70611907SBrandon.Potter@amd.com int sim_fd = -1; 70711907SBrandon.Potter@amd.com std::vector<std::string> special_paths = 70811907SBrandon.Potter@amd.com { "/proc/", "/system/", "/sys/", "/platform/", "/etc/passwd" }; 70911907SBrandon.Potter@amd.com for (auto entry : special_paths) { 71011907SBrandon.Potter@amd.com if (startswith(path, entry)) 71111907SBrandon.Potter@amd.com sim_fd = OS::openSpecialFile(path, p, tc); 71211907SBrandon.Potter@amd.com } 71311907SBrandon.Potter@amd.com if (sim_fd == -1) { 71411907SBrandon.Potter@amd.com sim_fd = open(path.c_str(), host_flags, mode); 71511907SBrandon.Potter@amd.com } 71611907SBrandon.Potter@amd.com if (sim_fd == -1) { 71711907SBrandon.Potter@amd.com int local = -errno; 71811907SBrandon.Potter@amd.com DPRINTF_SYSCALL(Verbose, "open%s: failed -> path:%s\n", 71911907SBrandon.Potter@amd.com isopenat ? "at" : "", path.c_str()); 72011907SBrandon.Potter@amd.com return local; 72111907SBrandon.Potter@amd.com } 722360SN/A 72311907SBrandon.Potter@amd.com /** 72411907SBrandon.Potter@amd.com * The file was opened successfully and needs to be recorded in the 72511907SBrandon.Potter@amd.com * process' file descriptor array so that it can be retrieved later. 72611907SBrandon.Potter@amd.com * The target file descriptor that is chosen will be the lowest unused 72711907SBrandon.Potter@amd.com * file descriptor. 72811907SBrandon.Potter@amd.com * Return the indirect target file descriptor back to the simulated 72911907SBrandon.Potter@amd.com * process to act as a handle for the opened file. 73011907SBrandon.Potter@amd.com */ 73111907SBrandon.Potter@amd.com auto ffdp = std::make_shared<FileFDEntry>(sim_fd, host_flags, path, 0); 73211907SBrandon.Potter@amd.com int tgt_fd = p->fds->allocFD(ffdp); 73311907SBrandon.Potter@amd.com DPRINTF_SYSCALL(Verbose, "open%s: sim_fd[%d], target_fd[%d] -> path:%s\n", 73411907SBrandon.Potter@amd.com isopenat ? "at" : "", sim_fd, tgt_fd, path.c_str()); 73511907SBrandon.Potter@amd.com return tgt_fd; 736360SN/A} 737360SN/A 73810027SChris.Adeniyi-Jones@arm.com/// Target open() handler. 73910027SChris.Adeniyi-Jones@arm.comtemplate <class OS> 74010027SChris.Adeniyi-Jones@arm.comSyscallReturn 74111851Sbrandon.potter@amd.comopenFunc(SyscallDesc *desc, int callnum, Process *process, 74210027SChris.Adeniyi-Jones@arm.com ThreadContext *tc) 74310027SChris.Adeniyi-Jones@arm.com{ 74411907SBrandon.Potter@amd.com return openImpl<OS>(desc, callnum, process, tc, false); 74510027SChris.Adeniyi-Jones@arm.com} 74610027SChris.Adeniyi-Jones@arm.com 74710027SChris.Adeniyi-Jones@arm.com/// Target openat() handler. 74810027SChris.Adeniyi-Jones@arm.comtemplate <class OS> 74910027SChris.Adeniyi-Jones@arm.comSyscallReturn 75011851Sbrandon.potter@amd.comopenatFunc(SyscallDesc *desc, int callnum, Process *process, 75111851Sbrandon.potter@amd.com ThreadContext *tc) 75210027SChris.Adeniyi-Jones@arm.com{ 75311907SBrandon.Potter@amd.com return openImpl<OS>(desc, callnum, process, tc, true); 75410027SChris.Adeniyi-Jones@arm.com} 75510027SChris.Adeniyi-Jones@arm.com 75610633Smichaelupton@gmail.com/// Target unlinkat() handler. 75710633Smichaelupton@gmail.comtemplate <class OS> 75810633Smichaelupton@gmail.comSyscallReturn 75911851Sbrandon.potter@amd.comunlinkatFunc(SyscallDesc *desc, int callnum, Process *process, 76010633Smichaelupton@gmail.com ThreadContext *tc) 76110633Smichaelupton@gmail.com{ 76210633Smichaelupton@gmail.com int index = 0; 76310633Smichaelupton@gmail.com int dirfd = process->getSyscallArg(tc, index); 76410633Smichaelupton@gmail.com if (dirfd != OS::TGT_AT_FDCWD) 76510633Smichaelupton@gmail.com warn("unlinkat: first argument not AT_FDCWD; unlikely to work"); 76610633Smichaelupton@gmail.com 76710633Smichaelupton@gmail.com return unlinkHelper(desc, callnum, process, tc, 1); 76810633Smichaelupton@gmail.com} 76910633Smichaelupton@gmail.com 77010203SAli.Saidi@ARM.com/// Target facessat() handler 77110203SAli.Saidi@ARM.comtemplate <class OS> 77210203SAli.Saidi@ARM.comSyscallReturn 77311851Sbrandon.potter@amd.comfaccessatFunc(SyscallDesc *desc, int callnum, Process *process, 77411851Sbrandon.potter@amd.com ThreadContext *tc) 77510203SAli.Saidi@ARM.com{ 77610203SAli.Saidi@ARM.com int index = 0; 77710203SAli.Saidi@ARM.com int dirfd = process->getSyscallArg(tc, index); 77810203SAli.Saidi@ARM.com if (dirfd != OS::TGT_AT_FDCWD) 77910203SAli.Saidi@ARM.com warn("faccessat: first argument not AT_FDCWD; unlikely to work"); 78010203SAli.Saidi@ARM.com return accessFunc(desc, callnum, process, tc, 1); 78110203SAli.Saidi@ARM.com} 78210203SAli.Saidi@ARM.com 78310203SAli.Saidi@ARM.com/// Target readlinkat() handler 78410203SAli.Saidi@ARM.comtemplate <class OS> 78510203SAli.Saidi@ARM.comSyscallReturn 78611851Sbrandon.potter@amd.comreadlinkatFunc(SyscallDesc *desc, int callnum, Process *process, 78711851Sbrandon.potter@amd.com ThreadContext *tc) 78810203SAli.Saidi@ARM.com{ 78910203SAli.Saidi@ARM.com int index = 0; 79010203SAli.Saidi@ARM.com int dirfd = process->getSyscallArg(tc, index); 79110203SAli.Saidi@ARM.com if (dirfd != OS::TGT_AT_FDCWD) 79210203SAli.Saidi@ARM.com warn("openat: first argument not AT_FDCWD; unlikely to work"); 79310203SAli.Saidi@ARM.com return readlinkFunc(desc, callnum, process, tc, 1); 79410203SAli.Saidi@ARM.com} 79510203SAli.Saidi@ARM.com 79610850SGiacomo.Gabrielli@arm.com/// Target renameat() handler. 79710850SGiacomo.Gabrielli@arm.comtemplate <class OS> 79810850SGiacomo.Gabrielli@arm.comSyscallReturn 79911851Sbrandon.potter@amd.comrenameatFunc(SyscallDesc *desc, int callnum, Process *process, 80010850SGiacomo.Gabrielli@arm.com ThreadContext *tc) 80110850SGiacomo.Gabrielli@arm.com{ 80210850SGiacomo.Gabrielli@arm.com int index = 0; 80310850SGiacomo.Gabrielli@arm.com 80410850SGiacomo.Gabrielli@arm.com int olddirfd = process->getSyscallArg(tc, index); 80510850SGiacomo.Gabrielli@arm.com if (olddirfd != OS::TGT_AT_FDCWD) 80610850SGiacomo.Gabrielli@arm.com warn("renameat: first argument not AT_FDCWD; unlikely to work"); 80710850SGiacomo.Gabrielli@arm.com 80810850SGiacomo.Gabrielli@arm.com std::string old_name; 80910850SGiacomo.Gabrielli@arm.com 81010850SGiacomo.Gabrielli@arm.com if (!tc->getMemProxy().tryReadString(old_name, 81110850SGiacomo.Gabrielli@arm.com process->getSyscallArg(tc, index))) 81210850SGiacomo.Gabrielli@arm.com return -EFAULT; 81310850SGiacomo.Gabrielli@arm.com 81410850SGiacomo.Gabrielli@arm.com int newdirfd = process->getSyscallArg(tc, index); 81510850SGiacomo.Gabrielli@arm.com if (newdirfd != OS::TGT_AT_FDCWD) 81610850SGiacomo.Gabrielli@arm.com warn("renameat: third argument not AT_FDCWD; unlikely to work"); 81710850SGiacomo.Gabrielli@arm.com 81810850SGiacomo.Gabrielli@arm.com std::string new_name; 81910850SGiacomo.Gabrielli@arm.com 82010850SGiacomo.Gabrielli@arm.com if (!tc->getMemProxy().tryReadString(new_name, 82110850SGiacomo.Gabrielli@arm.com process->getSyscallArg(tc, index))) 82210850SGiacomo.Gabrielli@arm.com return -EFAULT; 82310850SGiacomo.Gabrielli@arm.com 82410850SGiacomo.Gabrielli@arm.com // Adjust path for current working directory 82510850SGiacomo.Gabrielli@arm.com old_name = process->fullPath(old_name); 82610850SGiacomo.Gabrielli@arm.com new_name = process->fullPath(new_name); 82710850SGiacomo.Gabrielli@arm.com 82810850SGiacomo.Gabrielli@arm.com int result = rename(old_name.c_str(), new_name.c_str()); 82910850SGiacomo.Gabrielli@arm.com return (result == -1) ? -errno : result; 83010850SGiacomo.Gabrielli@arm.com} 83110850SGiacomo.Gabrielli@arm.com 8326640Svince@csl.cornell.edu/// Target sysinfo() handler. 8336640Svince@csl.cornell.edutemplate <class OS> 8346640Svince@csl.cornell.eduSyscallReturn 83511851Sbrandon.potter@amd.comsysinfoFunc(SyscallDesc *desc, int callnum, Process *process, 83611851Sbrandon.potter@amd.com ThreadContext *tc) 8376640Svince@csl.cornell.edu{ 8386640Svince@csl.cornell.edu 8396701Sgblack@eecs.umich.edu int index = 0; 8406701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::tgt_sysinfo> 84110793Sbrandon.potter@amd.com sysinfo(process->getSyscallArg(tc, index)); 8426640Svince@csl.cornell.edu 84311758Sbrandon.potter@amd.com sysinfo->uptime = seconds_since_epoch; 84411758Sbrandon.potter@amd.com sysinfo->totalram = process->system->memSize(); 84511758Sbrandon.potter@amd.com sysinfo->mem_unit = 1; 8466640Svince@csl.cornell.edu 8478706Sandreas.hansson@arm.com sysinfo.copyOut(tc->getMemProxy()); 8486640Svince@csl.cornell.edu 8496701Sgblack@eecs.umich.edu return 0; 8506640Svince@csl.cornell.edu} 851360SN/A 8521999SN/A/// Target chmod() handler. 8531999SN/Atemplate <class OS> 8541999SN/ASyscallReturn 85511851Sbrandon.potter@amd.comchmodFunc(SyscallDesc *desc, int callnum, Process *process, 8562680Sktlim@umich.edu ThreadContext *tc) 8571999SN/A{ 8581999SN/A std::string path; 8591999SN/A 8606701Sgblack@eecs.umich.edu int index = 0; 8618852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 8626701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 8631999SN/A return -EFAULT; 8646701Sgblack@eecs.umich.edu } 8651999SN/A 8666701Sgblack@eecs.umich.edu uint32_t mode = process->getSyscallArg(tc, index); 8671999SN/A mode_t hostMode = 0; 8681999SN/A 8691999SN/A // XXX translate mode flags via OS::something??? 8701999SN/A hostMode = mode; 8711999SN/A 8723669Sbinkertn@umich.edu // Adjust path for current working directory 8733669Sbinkertn@umich.edu path = process->fullPath(path); 8743669Sbinkertn@umich.edu 8751999SN/A // do the chmod 8761999SN/A int result = chmod(path.c_str(), hostMode); 8771999SN/A if (result < 0) 8782218SN/A return -errno; 8791999SN/A 8801999SN/A return 0; 8811999SN/A} 8821999SN/A 8831999SN/A 8841999SN/A/// Target fchmod() handler. 8851999SN/Atemplate <class OS> 8861999SN/ASyscallReturn 88711856Sbrandon.potter@amd.comfchmodFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 8881999SN/A{ 8896701Sgblack@eecs.umich.edu int index = 0; 89011856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 89111856Sbrandon.potter@amd.com uint32_t mode = p->getSyscallArg(tc, index); 89210931Sbrandon.potter@amd.com 89311856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 89411856Sbrandon.potter@amd.com if (!ffdp) 8951999SN/A return -EBADF; 89611856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 8971999SN/A 89811856Sbrandon.potter@amd.com mode_t hostMode = mode; 8991999SN/A 90011856Sbrandon.potter@amd.com int result = fchmod(sim_fd, hostMode); 9011999SN/A 90211856Sbrandon.potter@amd.com return (result < 0) ? -errno : 0; 9031999SN/A} 9041999SN/A 9055877Shsul@eecs.umich.edu/// Target mremap() handler. 9065877Shsul@eecs.umich.edutemplate <class OS> 9075877Shsul@eecs.umich.eduSyscallReturn 90811851Sbrandon.potter@amd.commremapFunc(SyscallDesc *desc, int callnum, Process *process, ThreadContext *tc) 9095877Shsul@eecs.umich.edu{ 9106701Sgblack@eecs.umich.edu int index = 0; 9116701Sgblack@eecs.umich.edu Addr start = process->getSyscallArg(tc, index); 9126701Sgblack@eecs.umich.edu uint64_t old_length = process->getSyscallArg(tc, index); 9136701Sgblack@eecs.umich.edu uint64_t new_length = process->getSyscallArg(tc, index); 9146701Sgblack@eecs.umich.edu uint64_t flags = process->getSyscallArg(tc, index); 91510027SChris.Adeniyi-Jones@arm.com uint64_t provided_address = 0; 91610027SChris.Adeniyi-Jones@arm.com bool use_provided_address = flags & OS::TGT_MREMAP_FIXED; 91710027SChris.Adeniyi-Jones@arm.com 91810027SChris.Adeniyi-Jones@arm.com if (use_provided_address) 91910027SChris.Adeniyi-Jones@arm.com provided_address = process->getSyscallArg(tc, index); 9205877Shsul@eecs.umich.edu 92110318Sandreas.hansson@arm.com if ((start % TheISA::PageBytes != 0) || 92210318Sandreas.hansson@arm.com (provided_address % TheISA::PageBytes != 0)) { 9235877Shsul@eecs.umich.edu warn("mremap failing: arguments not page aligned"); 9245877Shsul@eecs.umich.edu return -EINVAL; 9255877Shsul@eecs.umich.edu } 9265877Shsul@eecs.umich.edu 92710486Stjablin@gmail.com new_length = roundUp(new_length, TheISA::PageBytes); 92810486Stjablin@gmail.com 9295877Shsul@eecs.umich.edu if (new_length > old_length) { 93011905SBrandon.Potter@amd.com std::shared_ptr<MemState> mem_state = process->memState; 93111905SBrandon.Potter@amd.com Addr mmap_end = mem_state->getMmapEnd(); 93211905SBrandon.Potter@amd.com 93311905SBrandon.Potter@amd.com if ((start + old_length) == mmap_end && 93410027SChris.Adeniyi-Jones@arm.com (!use_provided_address || provided_address == start)) { 93512206Srico.amslinger@informatik.uni-augsburg.de // This case cannot occur when growing downward, as 93612206Srico.amslinger@informatik.uni-augsburg.de // start is greater than or equal to mmap_end. 9375877Shsul@eecs.umich.edu uint64_t diff = new_length - old_length; 93811905SBrandon.Potter@amd.com process->allocateMem(mmap_end, diff); 93911905SBrandon.Potter@amd.com mem_state->setMmapEnd(mmap_end + diff); 9405877Shsul@eecs.umich.edu return start; 9415877Shsul@eecs.umich.edu } else { 94210027SChris.Adeniyi-Jones@arm.com if (!use_provided_address && !(flags & OS::TGT_MREMAP_MAYMOVE)) { 9435877Shsul@eecs.umich.edu warn("can't remap here and MREMAP_MAYMOVE flag not set\n"); 9445877Shsul@eecs.umich.edu return -ENOMEM; 9455877Shsul@eecs.umich.edu } else { 94612206Srico.amslinger@informatik.uni-augsburg.de uint64_t new_start = provided_address; 94712206Srico.amslinger@informatik.uni-augsburg.de if (!use_provided_address) { 94812206Srico.amslinger@informatik.uni-augsburg.de new_start = process->mmapGrowsDown() ? 94912206Srico.amslinger@informatik.uni-augsburg.de mmap_end - new_length : mmap_end; 95012206Srico.amslinger@informatik.uni-augsburg.de mmap_end = process->mmapGrowsDown() ? 95112206Srico.amslinger@informatik.uni-augsburg.de new_start : mmap_end + new_length; 95212206Srico.amslinger@informatik.uni-augsburg.de mem_state->setMmapEnd(mmap_end); 95312206Srico.amslinger@informatik.uni-augsburg.de } 95412206Srico.amslinger@informatik.uni-augsburg.de 95510027SChris.Adeniyi-Jones@arm.com process->pTable->remap(start, old_length, new_start); 95610027SChris.Adeniyi-Jones@arm.com warn("mremapping to new vaddr %08p-%08p, adding %d\n", 95710027SChris.Adeniyi-Jones@arm.com new_start, new_start + new_length, 95810027SChris.Adeniyi-Jones@arm.com new_length - old_length); 9595877Shsul@eecs.umich.edu // add on the remaining unallocated pages 96010027SChris.Adeniyi-Jones@arm.com process->allocateMem(new_start + old_length, 96110027SChris.Adeniyi-Jones@arm.com new_length - old_length, 96210027SChris.Adeniyi-Jones@arm.com use_provided_address /* clobber */); 96310027SChris.Adeniyi-Jones@arm.com if (use_provided_address && 96412206Srico.amslinger@informatik.uni-augsburg.de ((new_start + new_length > mem_state->getMmapEnd() && 96512206Srico.amslinger@informatik.uni-augsburg.de !process->mmapGrowsDown()) || 96612206Srico.amslinger@informatik.uni-augsburg.de (new_start < mem_state->getMmapEnd() && 96712206Srico.amslinger@informatik.uni-augsburg.de process->mmapGrowsDown()))) { 96810027SChris.Adeniyi-Jones@arm.com // something fishy going on here, at least notify the user 96910027SChris.Adeniyi-Jones@arm.com // @todo: increase mmap_end? 97010027SChris.Adeniyi-Jones@arm.com warn("mmap region limit exceeded with MREMAP_FIXED\n"); 97110027SChris.Adeniyi-Jones@arm.com } 97210027SChris.Adeniyi-Jones@arm.com warn("returning %08p as start\n", new_start); 97310027SChris.Adeniyi-Jones@arm.com return new_start; 9745877Shsul@eecs.umich.edu } 9755877Shsul@eecs.umich.edu } 9765877Shsul@eecs.umich.edu } else { 97710027SChris.Adeniyi-Jones@arm.com if (use_provided_address && provided_address != start) 97810027SChris.Adeniyi-Jones@arm.com process->pTable->remap(start, new_length, provided_address); 9798601Ssteve.reinhardt@amd.com process->pTable->unmap(start + new_length, old_length - new_length); 98010027SChris.Adeniyi-Jones@arm.com return use_provided_address ? provided_address : start; 9815877Shsul@eecs.umich.edu } 9825877Shsul@eecs.umich.edu} 9831999SN/A 984378SN/A/// Target stat() handler. 985360SN/Atemplate <class OS> 9861450SN/ASyscallReturn 98711851Sbrandon.potter@amd.comstatFunc(SyscallDesc *desc, int callnum, Process *process, 9882680Sktlim@umich.edu ThreadContext *tc) 989360SN/A{ 990360SN/A std::string path; 991360SN/A 9926701Sgblack@eecs.umich.edu int index = 0; 9938852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 9946701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 9956701Sgblack@eecs.umich.edu return -EFAULT; 9966701Sgblack@eecs.umich.edu } 9976701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 998360SN/A 9993669Sbinkertn@umich.edu // Adjust path for current working directory 10003669Sbinkertn@umich.edu path = process->fullPath(path); 10013669Sbinkertn@umich.edu 1002360SN/A struct stat hostBuf; 1003360SN/A int result = stat(path.c_str(), &hostBuf); 1004360SN/A 1005360SN/A if (result < 0) 10062218SN/A return -errno; 1007360SN/A 10088706Sandreas.hansson@arm.com copyOutStatBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 1009360SN/A 10101458SN/A return 0; 1011360SN/A} 1012360SN/A 1013360SN/A 10145074Ssaidi@eecs.umich.edu/// Target stat64() handler. 10155074Ssaidi@eecs.umich.edutemplate <class OS> 10165074Ssaidi@eecs.umich.eduSyscallReturn 101711851Sbrandon.potter@amd.comstat64Func(SyscallDesc *desc, int callnum, Process *process, 10185074Ssaidi@eecs.umich.edu ThreadContext *tc) 10195074Ssaidi@eecs.umich.edu{ 10205074Ssaidi@eecs.umich.edu std::string path; 10215074Ssaidi@eecs.umich.edu 10226701Sgblack@eecs.umich.edu int index = 0; 10238852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 10246701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) 10255074Ssaidi@eecs.umich.edu return -EFAULT; 10266701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 10275074Ssaidi@eecs.umich.edu 10285074Ssaidi@eecs.umich.edu // Adjust path for current working directory 10295074Ssaidi@eecs.umich.edu path = process->fullPath(path); 10305074Ssaidi@eecs.umich.edu 10315208Ssaidi@eecs.umich.edu#if NO_STAT64 10325208Ssaidi@eecs.umich.edu struct stat hostBuf; 10335208Ssaidi@eecs.umich.edu int result = stat(path.c_str(), &hostBuf); 10345208Ssaidi@eecs.umich.edu#else 10355074Ssaidi@eecs.umich.edu struct stat64 hostBuf; 10365074Ssaidi@eecs.umich.edu int result = stat64(path.c_str(), &hostBuf); 10375208Ssaidi@eecs.umich.edu#endif 10385074Ssaidi@eecs.umich.edu 10395074Ssaidi@eecs.umich.edu if (result < 0) 10405074Ssaidi@eecs.umich.edu return -errno; 10415074Ssaidi@eecs.umich.edu 10428706Sandreas.hansson@arm.com copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 10435074Ssaidi@eecs.umich.edu 10445074Ssaidi@eecs.umich.edu return 0; 10455074Ssaidi@eecs.umich.edu} 10465074Ssaidi@eecs.umich.edu 10475074Ssaidi@eecs.umich.edu 104810027SChris.Adeniyi-Jones@arm.com/// Target fstatat64() handler. 104910027SChris.Adeniyi-Jones@arm.comtemplate <class OS> 105010027SChris.Adeniyi-Jones@arm.comSyscallReturn 105111851Sbrandon.potter@amd.comfstatat64Func(SyscallDesc *desc, int callnum, Process *process, 105210027SChris.Adeniyi-Jones@arm.com ThreadContext *tc) 105310027SChris.Adeniyi-Jones@arm.com{ 105410027SChris.Adeniyi-Jones@arm.com int index = 0; 105510027SChris.Adeniyi-Jones@arm.com int dirfd = process->getSyscallArg(tc, index); 105610027SChris.Adeniyi-Jones@arm.com if (dirfd != OS::TGT_AT_FDCWD) 105710793Sbrandon.potter@amd.com warn("fstatat64: first argument not AT_FDCWD; unlikely to work"); 105810027SChris.Adeniyi-Jones@arm.com 105910027SChris.Adeniyi-Jones@arm.com std::string path; 106010027SChris.Adeniyi-Jones@arm.com if (!tc->getMemProxy().tryReadString(path, 106110027SChris.Adeniyi-Jones@arm.com process->getSyscallArg(tc, index))) 106210027SChris.Adeniyi-Jones@arm.com return -EFAULT; 106310027SChris.Adeniyi-Jones@arm.com Addr bufPtr = process->getSyscallArg(tc, index); 106410027SChris.Adeniyi-Jones@arm.com 106510027SChris.Adeniyi-Jones@arm.com // Adjust path for current working directory 106610027SChris.Adeniyi-Jones@arm.com path = process->fullPath(path); 106710027SChris.Adeniyi-Jones@arm.com 106810027SChris.Adeniyi-Jones@arm.com#if NO_STAT64 106910027SChris.Adeniyi-Jones@arm.com struct stat hostBuf; 107010027SChris.Adeniyi-Jones@arm.com int result = stat(path.c_str(), &hostBuf); 107110027SChris.Adeniyi-Jones@arm.com#else 107210027SChris.Adeniyi-Jones@arm.com struct stat64 hostBuf; 107310027SChris.Adeniyi-Jones@arm.com int result = stat64(path.c_str(), &hostBuf); 107410027SChris.Adeniyi-Jones@arm.com#endif 107510027SChris.Adeniyi-Jones@arm.com 107610027SChris.Adeniyi-Jones@arm.com if (result < 0) 107710027SChris.Adeniyi-Jones@arm.com return -errno; 107810027SChris.Adeniyi-Jones@arm.com 107910027SChris.Adeniyi-Jones@arm.com copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 108010027SChris.Adeniyi-Jones@arm.com 108110027SChris.Adeniyi-Jones@arm.com return 0; 108210027SChris.Adeniyi-Jones@arm.com} 108310027SChris.Adeniyi-Jones@arm.com 108410027SChris.Adeniyi-Jones@arm.com 10851999SN/A/// Target fstat64() handler. 10861999SN/Atemplate <class OS> 10871999SN/ASyscallReturn 108811856Sbrandon.potter@amd.comfstat64Func(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 10891999SN/A{ 10906701Sgblack@eecs.umich.edu int index = 0; 109111856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 109211856Sbrandon.potter@amd.com Addr bufPtr = p->getSyscallArg(tc, index); 109310931Sbrandon.potter@amd.com 109411856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 109511856Sbrandon.potter@amd.com if (!ffdp) 10961999SN/A return -EBADF; 109711856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 10981999SN/A 10992764Sstever@eecs.umich.edu#if NO_STAT64 11002064SN/A struct stat hostBuf; 110110931Sbrandon.potter@amd.com int result = fstat(sim_fd, &hostBuf); 11022064SN/A#else 11032064SN/A struct stat64 hostBuf; 110410931Sbrandon.potter@amd.com int result = fstat64(sim_fd, &hostBuf); 11052064SN/A#endif 11061999SN/A 11071999SN/A if (result < 0) 11082218SN/A return -errno; 11091999SN/A 111010931Sbrandon.potter@amd.com copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf, (sim_fd == 1)); 11111999SN/A 11121999SN/A return 0; 11131999SN/A} 11141999SN/A 11151999SN/A 1116378SN/A/// Target lstat() handler. 1117360SN/Atemplate <class OS> 11181450SN/ASyscallReturn 111911851Sbrandon.potter@amd.comlstatFunc(SyscallDesc *desc, int callnum, Process *process, 11202680Sktlim@umich.edu ThreadContext *tc) 1121360SN/A{ 1122360SN/A std::string path; 1123360SN/A 11246701Sgblack@eecs.umich.edu int index = 0; 11258852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 11266701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 11276701Sgblack@eecs.umich.edu return -EFAULT; 11286701Sgblack@eecs.umich.edu } 11296701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 1130360SN/A 11313669Sbinkertn@umich.edu // Adjust path for current working directory 11323669Sbinkertn@umich.edu path = process->fullPath(path); 11333669Sbinkertn@umich.edu 1134360SN/A struct stat hostBuf; 1135360SN/A int result = lstat(path.c_str(), &hostBuf); 1136360SN/A 1137360SN/A if (result < 0) 11381458SN/A return -errno; 1139360SN/A 11408706Sandreas.hansson@arm.com copyOutStatBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 1141360SN/A 11421458SN/A return 0; 1143360SN/A} 1144360SN/A 11451999SN/A/// Target lstat64() handler. 11461999SN/Atemplate <class OS> 11471999SN/ASyscallReturn 114811851Sbrandon.potter@amd.comlstat64Func(SyscallDesc *desc, int callnum, Process *process, 11492680Sktlim@umich.edu ThreadContext *tc) 11501999SN/A{ 11511999SN/A std::string path; 11521999SN/A 11536701Sgblack@eecs.umich.edu int index = 0; 11548852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 11556701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 11566701Sgblack@eecs.umich.edu return -EFAULT; 11576701Sgblack@eecs.umich.edu } 11586701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 11591999SN/A 11603669Sbinkertn@umich.edu // Adjust path for current working directory 11613669Sbinkertn@umich.edu path = process->fullPath(path); 11623669Sbinkertn@umich.edu 11632764Sstever@eecs.umich.edu#if NO_STAT64 11642064SN/A struct stat hostBuf; 11652064SN/A int result = lstat(path.c_str(), &hostBuf); 11662064SN/A#else 11671999SN/A struct stat64 hostBuf; 11681999SN/A int result = lstat64(path.c_str(), &hostBuf); 11692064SN/A#endif 11701999SN/A 11711999SN/A if (result < 0) 11721999SN/A return -errno; 11731999SN/A 11748706Sandreas.hansson@arm.com copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 11751999SN/A 11761999SN/A return 0; 11771999SN/A} 11781999SN/A 1179378SN/A/// Target fstat() handler. 1180360SN/Atemplate <class OS> 11811450SN/ASyscallReturn 118211856Sbrandon.potter@amd.comfstatFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 1183360SN/A{ 11846701Sgblack@eecs.umich.edu int index = 0; 118511856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 118611856Sbrandon.potter@amd.com Addr bufPtr = p->getSyscallArg(tc, index); 1187360SN/A 118811380Salexandru.dutu@amd.com DPRINTF_SYSCALL(Verbose, "fstat(%d, ...)\n", tgt_fd); 1189360SN/A 119011856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 119111856Sbrandon.potter@amd.com if (!ffdp) 11921458SN/A return -EBADF; 119311856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 1194360SN/A 1195360SN/A struct stat hostBuf; 119610931Sbrandon.potter@amd.com int result = fstat(sim_fd, &hostBuf); 1197360SN/A 1198360SN/A if (result < 0) 11991458SN/A return -errno; 1200360SN/A 120110931Sbrandon.potter@amd.com copyOutStatBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf, (sim_fd == 1)); 12022021SN/A 12031458SN/A return 0; 1204360SN/A} 1205360SN/A 1206360SN/A 12071706SN/A/// Target statfs() handler. 12081706SN/Atemplate <class OS> 12091706SN/ASyscallReturn 121011851Sbrandon.potter@amd.comstatfsFunc(SyscallDesc *desc, int callnum, Process *process, 12112680Sktlim@umich.edu ThreadContext *tc) 12121706SN/A{ 121311799Sbrandon.potter@amd.com#if NO_STATFS 121411799Sbrandon.potter@amd.com warn("Host OS cannot support calls to statfs. Ignoring syscall"); 121511799Sbrandon.potter@amd.com#else 12161706SN/A std::string path; 12171706SN/A 12186701Sgblack@eecs.umich.edu int index = 0; 12198852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 12206701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 12216701Sgblack@eecs.umich.edu return -EFAULT; 12226701Sgblack@eecs.umich.edu } 12236701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 12241706SN/A 12253669Sbinkertn@umich.edu // Adjust path for current working directory 12263669Sbinkertn@umich.edu path = process->fullPath(path); 12273669Sbinkertn@umich.edu 12281706SN/A struct statfs hostBuf; 12291706SN/A int result = statfs(path.c_str(), &hostBuf); 12301706SN/A 12311706SN/A if (result < 0) 12322218SN/A return -errno; 12331706SN/A 123411759Sbrandon.potter@amd.com copyOutStatfsBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 123511799Sbrandon.potter@amd.com#endif 12361706SN/A return 0; 12371706SN/A} 12381706SN/A 123911886Sbrandon.potter@amd.comtemplate <class OS> 124011886Sbrandon.potter@amd.comSyscallReturn 124111886Sbrandon.potter@amd.comcloneFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 124211886Sbrandon.potter@amd.com{ 124311886Sbrandon.potter@amd.com int index = 0; 124411886Sbrandon.potter@amd.com TheISA::IntReg flags = p->getSyscallArg(tc, index); 124511886Sbrandon.potter@amd.com TheISA::IntReg newStack = p->getSyscallArg(tc, index); 124611886Sbrandon.potter@amd.com Addr ptidPtr = p->getSyscallArg(tc, index); 124711886Sbrandon.potter@amd.com Addr ctidPtr = p->getSyscallArg(tc, index); 124811886Sbrandon.potter@amd.com Addr tlsPtr M5_VAR_USED = p->getSyscallArg(tc, index); 124911886Sbrandon.potter@amd.com 125011886Sbrandon.potter@amd.com if (((flags & OS::TGT_CLONE_SIGHAND)&& !(flags & OS::TGT_CLONE_VM)) || 125111886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_THREAD) && !(flags & OS::TGT_CLONE_SIGHAND)) || 125211886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_FS) && (flags & OS::TGT_CLONE_NEWNS)) || 125311886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_NEWIPC) && (flags & OS::TGT_CLONE_SYSVSEM)) || 125411886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_NEWPID) && (flags & OS::TGT_CLONE_THREAD)) || 125511886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_VM) && !(newStack))) 125611886Sbrandon.potter@amd.com return -EINVAL; 125711886Sbrandon.potter@amd.com 125811886Sbrandon.potter@amd.com ThreadContext *ctc; 125911886Sbrandon.potter@amd.com if (!(ctc = p->findFreeContext())) 126011886Sbrandon.potter@amd.com fatal("clone: no spare thread context in system"); 126111886Sbrandon.potter@amd.com 126211886Sbrandon.potter@amd.com /** 126311886Sbrandon.potter@amd.com * Note that ProcessParams is generated by swig and there are no other 126411886Sbrandon.potter@amd.com * examples of how to create anything but this default constructor. The 126511886Sbrandon.potter@amd.com * fields are manually initialized instead of passing parameters to the 126611886Sbrandon.potter@amd.com * constructor. 126711886Sbrandon.potter@amd.com */ 126811886Sbrandon.potter@amd.com ProcessParams *pp = new ProcessParams(); 126911886Sbrandon.potter@amd.com pp->executable.assign(*(new std::string(p->progName()))); 127011886Sbrandon.potter@amd.com pp->cmd.push_back(*(new std::string(p->progName()))); 127111886Sbrandon.potter@amd.com pp->system = p->system; 127211886Sbrandon.potter@amd.com pp->cwd.assign(p->getcwd()); 127311886Sbrandon.potter@amd.com pp->input.assign("stdin"); 127411886Sbrandon.potter@amd.com pp->output.assign("stdout"); 127511886Sbrandon.potter@amd.com pp->errout.assign("stderr"); 127611886Sbrandon.potter@amd.com pp->uid = p->uid(); 127711886Sbrandon.potter@amd.com pp->euid = p->euid(); 127811886Sbrandon.potter@amd.com pp->gid = p->gid(); 127911886Sbrandon.potter@amd.com pp->egid = p->egid(); 128011886Sbrandon.potter@amd.com 128111886Sbrandon.potter@amd.com /* Find the first free PID that's less than the maximum */ 128211886Sbrandon.potter@amd.com std::set<int> const& pids = p->system->PIDs; 128311886Sbrandon.potter@amd.com int temp_pid = *pids.begin(); 128411886Sbrandon.potter@amd.com do { 128511886Sbrandon.potter@amd.com temp_pid++; 128611886Sbrandon.potter@amd.com } while (pids.find(temp_pid) != pids.end()); 128711886Sbrandon.potter@amd.com if (temp_pid >= System::maxPID) 128811886Sbrandon.potter@amd.com fatal("temp_pid is too large: %d", temp_pid); 128911886Sbrandon.potter@amd.com 129011886Sbrandon.potter@amd.com pp->pid = temp_pid; 129111886Sbrandon.potter@amd.com pp->ppid = (flags & OS::TGT_CLONE_THREAD) ? p->ppid() : p->pid(); 129211886Sbrandon.potter@amd.com Process *cp = pp->create(); 129311886Sbrandon.potter@amd.com delete pp; 129411886Sbrandon.potter@amd.com 129511886Sbrandon.potter@amd.com Process *owner = ctc->getProcessPtr(); 129611886Sbrandon.potter@amd.com ctc->setProcessPtr(cp); 129711886Sbrandon.potter@amd.com cp->assignThreadContext(ctc->contextId()); 129811886Sbrandon.potter@amd.com owner->revokeThreadContext(ctc->contextId()); 129911886Sbrandon.potter@amd.com 130011886Sbrandon.potter@amd.com if (flags & OS::TGT_CLONE_PARENT_SETTID) { 130111886Sbrandon.potter@amd.com BufferArg ptidBuf(ptidPtr, sizeof(long)); 130211886Sbrandon.potter@amd.com long *ptid = (long *)ptidBuf.bufferPtr(); 130311886Sbrandon.potter@amd.com *ptid = cp->pid(); 130411886Sbrandon.potter@amd.com ptidBuf.copyOut(tc->getMemProxy()); 130511886Sbrandon.potter@amd.com } 130611886Sbrandon.potter@amd.com 130711886Sbrandon.potter@amd.com cp->initState(); 130811886Sbrandon.potter@amd.com p->clone(tc, ctc, cp, flags); 130911886Sbrandon.potter@amd.com 131011911SBrandon.Potter@amd.com if (flags & OS::TGT_CLONE_THREAD) { 131111911SBrandon.Potter@amd.com delete cp->sigchld; 131211911SBrandon.Potter@amd.com cp->sigchld = p->sigchld; 131311911SBrandon.Potter@amd.com } else if (flags & OS::TGT_SIGCHLD) { 131411911SBrandon.Potter@amd.com *cp->sigchld = true; 131511911SBrandon.Potter@amd.com } 131611911SBrandon.Potter@amd.com 131711886Sbrandon.potter@amd.com if (flags & OS::TGT_CLONE_CHILD_SETTID) { 131811886Sbrandon.potter@amd.com BufferArg ctidBuf(ctidPtr, sizeof(long)); 131911886Sbrandon.potter@amd.com long *ctid = (long *)ctidBuf.bufferPtr(); 132011886Sbrandon.potter@amd.com *ctid = cp->pid(); 132111886Sbrandon.potter@amd.com ctidBuf.copyOut(ctc->getMemProxy()); 132211886Sbrandon.potter@amd.com } 132311886Sbrandon.potter@amd.com 132411886Sbrandon.potter@amd.com if (flags & OS::TGT_CLONE_CHILD_CLEARTID) 132511886Sbrandon.potter@amd.com cp->childClearTID = (uint64_t)ctidPtr; 132611886Sbrandon.potter@amd.com 132711886Sbrandon.potter@amd.com ctc->clearArchRegs(); 132811886Sbrandon.potter@amd.com 132911886Sbrandon.potter@amd.com#if THE_ISA == ALPHA_ISA 133011886Sbrandon.potter@amd.com TheISA::copyMiscRegs(tc, ctc); 133111886Sbrandon.potter@amd.com#elif THE_ISA == SPARC_ISA 133211886Sbrandon.potter@amd.com TheISA::copyRegs(tc, ctc); 133311886Sbrandon.potter@amd.com ctc->setIntReg(TheISA::NumIntArchRegs + 6, 0); 133411886Sbrandon.potter@amd.com ctc->setIntReg(TheISA::NumIntArchRegs + 4, 0); 133511886Sbrandon.potter@amd.com ctc->setIntReg(TheISA::NumIntArchRegs + 3, TheISA::NWindows - 2); 133611886Sbrandon.potter@amd.com ctc->setIntReg(TheISA::NumIntArchRegs + 5, TheISA::NWindows); 133711886Sbrandon.potter@amd.com ctc->setMiscReg(TheISA::MISCREG_CWP, 0); 133811886Sbrandon.potter@amd.com ctc->setIntReg(TheISA::NumIntArchRegs + 7, 0); 133911886Sbrandon.potter@amd.com ctc->setMiscRegNoEffect(TheISA::MISCREG_TL, 0); 134011886Sbrandon.potter@amd.com ctc->setMiscReg(TheISA::MISCREG_ASI, TheISA::ASI_PRIMARY); 134111886Sbrandon.potter@amd.com for (int y = 8; y < 32; y++) 134211886Sbrandon.potter@amd.com ctc->setIntReg(y, tc->readIntReg(y)); 134311886Sbrandon.potter@amd.com#elif THE_ISA == ARM_ISA or THE_ISA == X86_ISA 134411886Sbrandon.potter@amd.com TheISA::copyRegs(tc, ctc); 134511886Sbrandon.potter@amd.com#endif 134611886Sbrandon.potter@amd.com 134711886Sbrandon.potter@amd.com#if THE_ISA == X86_ISA 134811886Sbrandon.potter@amd.com if (flags & OS::TGT_CLONE_SETTLS) { 134911886Sbrandon.potter@amd.com ctc->setMiscRegNoEffect(TheISA::MISCREG_FS_BASE, tlsPtr); 135011886Sbrandon.potter@amd.com ctc->setMiscRegNoEffect(TheISA::MISCREG_FS_EFF_BASE, tlsPtr); 135111886Sbrandon.potter@amd.com } 135211886Sbrandon.potter@amd.com#endif 135311886Sbrandon.potter@amd.com 135411886Sbrandon.potter@amd.com if (newStack) 135511886Sbrandon.potter@amd.com ctc->setIntReg(TheISA::StackPointerReg, newStack); 135611886Sbrandon.potter@amd.com 135711886Sbrandon.potter@amd.com cp->setSyscallReturn(ctc, 0); 135811886Sbrandon.potter@amd.com 135911886Sbrandon.potter@amd.com#if THE_ISA == ALPHA_ISA 136011886Sbrandon.potter@amd.com ctc->setIntReg(TheISA::SyscallSuccessReg, 0); 136111886Sbrandon.potter@amd.com#elif THE_ISA == SPARC_ISA 136211886Sbrandon.potter@amd.com tc->setIntReg(TheISA::SyscallPseudoReturnReg, 0); 136311886Sbrandon.potter@amd.com ctc->setIntReg(TheISA::SyscallPseudoReturnReg, 1); 136411886Sbrandon.potter@amd.com#endif 136511886Sbrandon.potter@amd.com 136611886Sbrandon.potter@amd.com ctc->pcState(tc->nextInstAddr()); 136711886Sbrandon.potter@amd.com ctc->activate(); 136811886Sbrandon.potter@amd.com 136911886Sbrandon.potter@amd.com return cp->pid(); 137011886Sbrandon.potter@amd.com} 13711706SN/A 13721706SN/A/// Target fstatfs() handler. 13731706SN/Atemplate <class OS> 13741706SN/ASyscallReturn 137511856Sbrandon.potter@amd.comfstatfsFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 13761706SN/A{ 13776701Sgblack@eecs.umich.edu int index = 0; 137811856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 137911856Sbrandon.potter@amd.com Addr bufPtr = p->getSyscallArg(tc, index); 13801706SN/A 138111856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 138211856Sbrandon.potter@amd.com if (!ffdp) 13831706SN/A return -EBADF; 138411856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 13851706SN/A 13861706SN/A struct statfs hostBuf; 138710931Sbrandon.potter@amd.com int result = fstatfs(sim_fd, &hostBuf); 13881706SN/A 13891706SN/A if (result < 0) 13902218SN/A return -errno; 13911706SN/A 139211759Sbrandon.potter@amd.com copyOutStatfsBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 13931706SN/A 13941706SN/A return 0; 13951706SN/A} 13961706SN/A 13971706SN/A 13981999SN/A/// Target writev() handler. 13991999SN/Atemplate <class OS> 14001999SN/ASyscallReturn 140111856Sbrandon.potter@amd.comwritevFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 14021999SN/A{ 14036701Sgblack@eecs.umich.edu int index = 0; 140411856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 140510931Sbrandon.potter@amd.com 140611856Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 140711856Sbrandon.potter@amd.com if (!hbfdp) 14081999SN/A return -EBADF; 140911856Sbrandon.potter@amd.com int sim_fd = hbfdp->getSimFD(); 14101999SN/A 141111856Sbrandon.potter@amd.com SETranslatingPortProxy &prox = tc->getMemProxy(); 141211856Sbrandon.potter@amd.com uint64_t tiov_base = p->getSyscallArg(tc, index); 141311856Sbrandon.potter@amd.com size_t count = p->getSyscallArg(tc, index); 14141999SN/A struct iovec hiov[count]; 14156227Snate@binkert.org for (size_t i = 0; i < count; ++i) { 14161999SN/A typename OS::tgt_iovec tiov; 14172461SN/A 141811856Sbrandon.potter@amd.com prox.readBlob(tiov_base + i*sizeof(typename OS::tgt_iovec), 141911856Sbrandon.potter@amd.com (uint8_t*)&tiov, sizeof(typename OS::tgt_iovec)); 14208737Skoansin.tan@gmail.com hiov[i].iov_len = TheISA::gtoh(tiov.iov_len); 14211999SN/A hiov[i].iov_base = new char [hiov[i].iov_len]; 142211856Sbrandon.potter@amd.com prox.readBlob(TheISA::gtoh(tiov.iov_base), (uint8_t *)hiov[i].iov_base, 142311856Sbrandon.potter@amd.com hiov[i].iov_len); 14241999SN/A } 14251999SN/A 142610931Sbrandon.potter@amd.com int result = writev(sim_fd, hiov, count); 14271999SN/A 14286227Snate@binkert.org for (size_t i = 0; i < count; ++i) 14291999SN/A delete [] (char *)hiov[i].iov_base; 14301999SN/A 14311999SN/A if (result < 0) 14322218SN/A return -errno; 14331999SN/A 143410629Sjthestness@gmail.com return result; 14351999SN/A} 14361999SN/A 143711385Sbrandon.potter@amd.com/// Real mmap handler. 1438360SN/Atemplate <class OS> 14391450SN/ASyscallReturn 144011851Sbrandon.potter@amd.commmapImpl(SyscallDesc *desc, int num, Process *p, ThreadContext *tc, 144111385Sbrandon.potter@amd.com bool is_mmap2) 1442360SN/A{ 14436701Sgblack@eecs.umich.edu int index = 0; 14446701Sgblack@eecs.umich.edu Addr start = p->getSyscallArg(tc, index); 14456701Sgblack@eecs.umich.edu uint64_t length = p->getSyscallArg(tc, index); 144611383Sbrandon.potter@amd.com int prot = p->getSyscallArg(tc, index); 144711383Sbrandon.potter@amd.com int tgt_flags = p->getSyscallArg(tc, index); 14488324Ssteve.reinhardt@amd.com int tgt_fd = p->getSyscallArg(tc, index); 144910486Stjablin@gmail.com int offset = p->getSyscallArg(tc, index); 1450360SN/A 145111385Sbrandon.potter@amd.com if (is_mmap2) 145211385Sbrandon.potter@amd.com offset *= TheISA::PageBytes; 14539008Sgblack@eecs.umich.edu 145411383Sbrandon.potter@amd.com if (start & (TheISA::PageBytes - 1) || 145511383Sbrandon.potter@amd.com offset & (TheISA::PageBytes - 1) || 145611383Sbrandon.potter@amd.com (tgt_flags & OS::TGT_MAP_PRIVATE && 145711383Sbrandon.potter@amd.com tgt_flags & OS::TGT_MAP_SHARED) || 145811383Sbrandon.potter@amd.com (!(tgt_flags & OS::TGT_MAP_PRIVATE) && 145911383Sbrandon.potter@amd.com !(tgt_flags & OS::TGT_MAP_SHARED)) || 146011383Sbrandon.potter@amd.com !length) { 146111383Sbrandon.potter@amd.com return -EINVAL; 146211383Sbrandon.potter@amd.com } 14638324Ssteve.reinhardt@amd.com 146411383Sbrandon.potter@amd.com if ((prot & PROT_WRITE) && (tgt_flags & OS::TGT_MAP_SHARED)) { 146511383Sbrandon.potter@amd.com // With shared mmaps, there are two cases to consider: 146611383Sbrandon.potter@amd.com // 1) anonymous: writes should modify the mapping and this should be 146711383Sbrandon.potter@amd.com // visible to observers who share the mapping. Currently, it's 146811383Sbrandon.potter@amd.com // difficult to update the shared mapping because there's no 146911383Sbrandon.potter@amd.com // structure which maintains information about the which virtual 147011383Sbrandon.potter@amd.com // memory areas are shared. If that structure existed, it would be 147111383Sbrandon.potter@amd.com // possible to make the translations point to the same frames. 147211383Sbrandon.potter@amd.com // 2) file-backed: writes should modify the mapping and the file 147311383Sbrandon.potter@amd.com // which is backed by the mapping. The shared mapping problem is the 147411383Sbrandon.potter@amd.com // same as what was mentioned about the anonymous mappings. For 147511383Sbrandon.potter@amd.com // file-backed mappings, the writes to the file are difficult 147611383Sbrandon.potter@amd.com // because it requires syncing what the mapping holds with the file 147711383Sbrandon.potter@amd.com // that resides on the host system. So, any write on a real system 147811383Sbrandon.potter@amd.com // would cause the change to be propagated to the file mapping at 147911383Sbrandon.potter@amd.com // some point in the future (the inode is tracked along with the 148011383Sbrandon.potter@amd.com // mapping). This isn't guaranteed to always happen, but it usually 148111383Sbrandon.potter@amd.com // works well enough. The guarantee is provided by the msync system 148211383Sbrandon.potter@amd.com // call. We could force the change through with shared mappings with 148311383Sbrandon.potter@amd.com // a call to msync, but that again would require more information 148411383Sbrandon.potter@amd.com // than we currently maintain. 148511383Sbrandon.potter@amd.com warn("mmap: writing to shared mmap region is currently " 148611383Sbrandon.potter@amd.com "unsupported. The write succeeds on the target, but it " 148711383Sbrandon.potter@amd.com "will not be propagated to the host or shared mappings"); 14888324Ssteve.reinhardt@amd.com } 14895877Shsul@eecs.umich.edu 149010486Stjablin@gmail.com length = roundUp(length, TheISA::PageBytes); 149110486Stjablin@gmail.com 149211383Sbrandon.potter@amd.com int sim_fd = -1; 149311383Sbrandon.potter@amd.com uint8_t *pmap = nullptr; 149411383Sbrandon.potter@amd.com if (!(tgt_flags & OS::TGT_MAP_ANONYMOUS)) { 149511856Sbrandon.potter@amd.com std::shared_ptr<FDEntry> fdep = (*p->fds)[tgt_fd]; 149611624Smichael.lebeane@amd.com 149711856Sbrandon.potter@amd.com auto dfdp = std::dynamic_pointer_cast<DeviceFDEntry>(fdep); 149811856Sbrandon.potter@amd.com if (dfdp) { 149911856Sbrandon.potter@amd.com EmulatedDriver *emul_driver = dfdp->getDriver(); 150011856Sbrandon.potter@amd.com return emul_driver->mmap(p, tc, start, length, prot, 150111624Smichael.lebeane@amd.com tgt_flags, tgt_fd, offset); 150211624Smichael.lebeane@amd.com } 150311624Smichael.lebeane@amd.com 150411856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(fdep); 150511856Sbrandon.potter@amd.com if (!ffdp) 150611383Sbrandon.potter@amd.com return -EBADF; 150711856Sbrandon.potter@amd.com sim_fd = ffdp->getSimFD(); 1508360SN/A 150911913SBrandon.Potter@amd.com pmap = (decltype(pmap))mmap(nullptr, length, PROT_READ, MAP_PRIVATE, 151011383Sbrandon.potter@amd.com sim_fd, offset); 15118600Ssteve.reinhardt@amd.com 151211383Sbrandon.potter@amd.com if (pmap == (decltype(pmap))-1) { 151311383Sbrandon.potter@amd.com warn("mmap: failed to map file into host address space"); 151411383Sbrandon.potter@amd.com return -errno; 15158600Ssteve.reinhardt@amd.com } 15162544SN/A } 15172544SN/A 151811383Sbrandon.potter@amd.com // Extend global mmap region if necessary. Note that we ignore the 151911383Sbrandon.potter@amd.com // start address unless MAP_FIXED is specified. 152011383Sbrandon.potter@amd.com if (!(tgt_flags & OS::TGT_MAP_FIXED)) { 152111905SBrandon.Potter@amd.com std::shared_ptr<MemState> mem_state = p->memState; 152211905SBrandon.Potter@amd.com Addr mmap_end = mem_state->getMmapEnd(); 152311905SBrandon.Potter@amd.com 152411905SBrandon.Potter@amd.com start = p->mmapGrowsDown() ? mmap_end - length : mmap_end; 152511905SBrandon.Potter@amd.com mmap_end = p->mmapGrowsDown() ? start : mmap_end + length; 152611905SBrandon.Potter@amd.com 152711905SBrandon.Potter@amd.com mem_state->setMmapEnd(mmap_end); 152811383Sbrandon.potter@amd.com } 152911383Sbrandon.potter@amd.com 153011383Sbrandon.potter@amd.com DPRINTF_SYSCALL(Verbose, " mmap range is 0x%x - 0x%x\n", 153111383Sbrandon.potter@amd.com start, start + length - 1); 153211383Sbrandon.potter@amd.com 153311383Sbrandon.potter@amd.com // We only allow mappings to overwrite existing mappings if 153411383Sbrandon.potter@amd.com // TGT_MAP_FIXED is set. Otherwise it shouldn't be a problem 153511383Sbrandon.potter@amd.com // because we ignore the start hint if TGT_MAP_FIXED is not set. 153611383Sbrandon.potter@amd.com int clobber = tgt_flags & OS::TGT_MAP_FIXED; 153711383Sbrandon.potter@amd.com if (clobber) { 153811383Sbrandon.potter@amd.com for (auto tc : p->system->threadContexts) { 153911383Sbrandon.potter@amd.com // If we might be overwriting old mappings, we need to 154011383Sbrandon.potter@amd.com // invalidate potentially stale mappings out of the TLBs. 154111383Sbrandon.potter@amd.com tc->getDTBPtr()->flushAll(); 154211383Sbrandon.potter@amd.com tc->getITBPtr()->flushAll(); 15438600Ssteve.reinhardt@amd.com } 15446672Sgblack@eecs.umich.edu } 15458600Ssteve.reinhardt@amd.com 154611383Sbrandon.potter@amd.com // Allocate physical memory and map it in. If the page table is already 154711383Sbrandon.potter@amd.com // mapped and clobber is not set, the simulator will issue throw a 154811383Sbrandon.potter@amd.com // fatal and bail out of the simulation. 15498601Ssteve.reinhardt@amd.com p->allocateMem(start, length, clobber); 15502544SN/A 155111383Sbrandon.potter@amd.com // Transfer content into target address space. 155211383Sbrandon.potter@amd.com SETranslatingPortProxy &tp = tc->getMemProxy(); 155311383Sbrandon.potter@amd.com if (tgt_flags & OS::TGT_MAP_ANONYMOUS) { 155411383Sbrandon.potter@amd.com // In general, we should zero the mapped area for anonymous mappings, 155511383Sbrandon.potter@amd.com // with something like: 155611383Sbrandon.potter@amd.com // tp.memsetBlob(start, 0, length); 155711383Sbrandon.potter@amd.com // However, given that we don't support sparse mappings, and 155811383Sbrandon.potter@amd.com // some applications can map a couple of gigabytes of space 155911383Sbrandon.potter@amd.com // (intending sparse usage), that can get painfully expensive. 156011383Sbrandon.potter@amd.com // Fortunately, since we don't properly implement munmap either, 156111383Sbrandon.potter@amd.com // there's no danger of remapping used memory, so for now all 156211383Sbrandon.potter@amd.com // newly mapped memory should already be zeroed so we can skip it. 156311383Sbrandon.potter@amd.com } else { 156411383Sbrandon.potter@amd.com // It is possible to mmap an area larger than a file, however 156511383Sbrandon.potter@amd.com // accessing unmapped portions the system triggers a "Bus error" 156611383Sbrandon.potter@amd.com // on the host. We must know when to stop copying the file from 156711383Sbrandon.potter@amd.com // the host into the target address space. 156811383Sbrandon.potter@amd.com struct stat file_stat; 156911383Sbrandon.potter@amd.com if (fstat(sim_fd, &file_stat) > 0) 157011383Sbrandon.potter@amd.com fatal("mmap: cannot stat file"); 157111383Sbrandon.potter@amd.com 157211383Sbrandon.potter@amd.com // Copy the portion of the file that is resident. This requires 157311383Sbrandon.potter@amd.com // checking both the mmap size and the filesize that we are 157411383Sbrandon.potter@amd.com // trying to mmap into this space; the mmap size also depends 157511383Sbrandon.potter@amd.com // on the specified offset into the file. 157611383Sbrandon.potter@amd.com uint64_t size = std::min((uint64_t)file_stat.st_size - offset, 157711383Sbrandon.potter@amd.com length); 157811383Sbrandon.potter@amd.com tp.writeBlob(start, pmap, size); 157911383Sbrandon.potter@amd.com 158011383Sbrandon.potter@amd.com // Cleanup the mmap region before exiting this function. 158111383Sbrandon.potter@amd.com munmap(pmap, length); 158211383Sbrandon.potter@amd.com 158311392Sbrandon.potter@amd.com // Maintain the symbol table for dynamic executables. 158411392Sbrandon.potter@amd.com // The loader will call mmap to map the images into its address 158511392Sbrandon.potter@amd.com // space and we intercept that here. We can verify that we are 158611392Sbrandon.potter@amd.com // executing inside the loader by checking the program counter value. 158711392Sbrandon.potter@amd.com // XXX: with multiprogrammed workloads or multi-node configurations, 158811392Sbrandon.potter@amd.com // this will not work since there is a single global symbol table. 158911392Sbrandon.potter@amd.com ObjectFile *interpreter = p->getInterpreter(); 159011392Sbrandon.potter@amd.com if (interpreter) { 159111392Sbrandon.potter@amd.com Addr text_start = interpreter->textBase(); 159211392Sbrandon.potter@amd.com Addr text_end = text_start + interpreter->textSize(); 159311392Sbrandon.potter@amd.com 159411392Sbrandon.potter@amd.com Addr pc = tc->pcState().pc(); 159511392Sbrandon.potter@amd.com 159611392Sbrandon.potter@amd.com if (pc >= text_start && pc < text_end) { 159711856Sbrandon.potter@amd.com std::shared_ptr<FDEntry> fdep = (*p->fds)[tgt_fd]; 159811856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(fdep); 159911856Sbrandon.potter@amd.com ObjectFile *lib = createObjectFile(ffdp->getFileName()); 160011392Sbrandon.potter@amd.com 160111392Sbrandon.potter@amd.com if (lib) { 160211392Sbrandon.potter@amd.com lib->loadAllSymbols(debugSymbolTable, 160311392Sbrandon.potter@amd.com lib->textBase(), start); 160411392Sbrandon.potter@amd.com } 160511392Sbrandon.potter@amd.com } 160611392Sbrandon.potter@amd.com } 160711392Sbrandon.potter@amd.com 160811383Sbrandon.potter@amd.com // Note that we do not zero out the remainder of the mapping. This 160911383Sbrandon.potter@amd.com // is done by a real system, but it probably will not affect 161011383Sbrandon.potter@amd.com // execution (hopefully). 161111383Sbrandon.potter@amd.com } 161211383Sbrandon.potter@amd.com 16131458SN/A return start; 1614360SN/A} 1615360SN/A 161611593Santhony.gutierrez@amd.comtemplate <class OS> 161711593Santhony.gutierrez@amd.comSyscallReturn 161811851Sbrandon.potter@amd.compwrite64Func(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 161911593Santhony.gutierrez@amd.com{ 162011593Santhony.gutierrez@amd.com int index = 0; 162111593Santhony.gutierrez@amd.com int tgt_fd = p->getSyscallArg(tc, index); 162211593Santhony.gutierrez@amd.com Addr bufPtr = p->getSyscallArg(tc, index); 162311593Santhony.gutierrez@amd.com int nbytes = p->getSyscallArg(tc, index); 162411593Santhony.gutierrez@amd.com int offset = p->getSyscallArg(tc, index); 162511593Santhony.gutierrez@amd.com 162611856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 162711856Sbrandon.potter@amd.com if (!ffdp) 162811593Santhony.gutierrez@amd.com return -EBADF; 162911856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 163011593Santhony.gutierrez@amd.com 163111593Santhony.gutierrez@amd.com BufferArg bufArg(bufPtr, nbytes); 163211593Santhony.gutierrez@amd.com bufArg.copyIn(tc->getMemProxy()); 163311593Santhony.gutierrez@amd.com 163411594Santhony.gutierrez@amd.com int bytes_written = pwrite(sim_fd, bufArg.bufferPtr(), nbytes, offset); 163511593Santhony.gutierrez@amd.com 163611593Santhony.gutierrez@amd.com return (bytes_written == -1) ? -errno : bytes_written; 163711593Santhony.gutierrez@amd.com} 163811593Santhony.gutierrez@amd.com 163911385Sbrandon.potter@amd.com/// Target mmap() handler. 164011385Sbrandon.potter@amd.comtemplate <class OS> 164111385Sbrandon.potter@amd.comSyscallReturn 164211851Sbrandon.potter@amd.commmapFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 164311385Sbrandon.potter@amd.com{ 164411385Sbrandon.potter@amd.com return mmapImpl<OS>(desc, num, p, tc, false); 164511385Sbrandon.potter@amd.com} 164611385Sbrandon.potter@amd.com 164711385Sbrandon.potter@amd.com/// Target mmap2() handler. 164811385Sbrandon.potter@amd.comtemplate <class OS> 164911385Sbrandon.potter@amd.comSyscallReturn 165011851Sbrandon.potter@amd.commmap2Func(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 165111385Sbrandon.potter@amd.com{ 165211385Sbrandon.potter@amd.com return mmapImpl<OS>(desc, num, p, tc, true); 165311385Sbrandon.potter@amd.com} 165411385Sbrandon.potter@amd.com 1655378SN/A/// Target getrlimit() handler. 1656360SN/Atemplate <class OS> 16571450SN/ASyscallReturn 165811851Sbrandon.potter@amd.comgetrlimitFunc(SyscallDesc *desc, int callnum, Process *process, 165911851Sbrandon.potter@amd.com ThreadContext *tc) 1660360SN/A{ 16616701Sgblack@eecs.umich.edu int index = 0; 16626701Sgblack@eecs.umich.edu unsigned resource = process->getSyscallArg(tc, index); 16636701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::rlimit> rlp(process->getSyscallArg(tc, index)); 1664360SN/A 1665360SN/A switch (resource) { 166611906SBrandon.Potter@amd.com case OS::TGT_RLIMIT_STACK: 166711906SBrandon.Potter@amd.com // max stack size in bytes: make up a number (8MB for now) 166811906SBrandon.Potter@amd.com rlp->rlim_cur = rlp->rlim_max = 8 * 1024 * 1024; 166911906SBrandon.Potter@amd.com rlp->rlim_cur = TheISA::htog(rlp->rlim_cur); 167011906SBrandon.Potter@amd.com rlp->rlim_max = TheISA::htog(rlp->rlim_max); 167111906SBrandon.Potter@amd.com break; 1672360SN/A 167311906SBrandon.Potter@amd.com case OS::TGT_RLIMIT_DATA: 167411906SBrandon.Potter@amd.com // max data segment size in bytes: make up a number 167511906SBrandon.Potter@amd.com rlp->rlim_cur = rlp->rlim_max = 256 * 1024 * 1024; 167611906SBrandon.Potter@amd.com rlp->rlim_cur = TheISA::htog(rlp->rlim_cur); 167711906SBrandon.Potter@amd.com rlp->rlim_max = TheISA::htog(rlp->rlim_max); 167811906SBrandon.Potter@amd.com break; 16795877Shsul@eecs.umich.edu 168011906SBrandon.Potter@amd.com default: 168111906SBrandon.Potter@amd.com warn("getrlimit: unimplemented resource %d", resource); 168211906SBrandon.Potter@amd.com return -EINVAL; 168311906SBrandon.Potter@amd.com break; 1684360SN/A } 1685360SN/A 16868706Sandreas.hansson@arm.com rlp.copyOut(tc->getMemProxy()); 16871458SN/A return 0; 1688360SN/A} 1689360SN/A 169012235Sar4jc@virginia.edutemplate <class OS> 169112235Sar4jc@virginia.eduSyscallReturn 169212235Sar4jc@virginia.eduprlimitFunc(SyscallDesc *desc, int callnum, Process *process, 169312235Sar4jc@virginia.edu ThreadContext *tc) 169412235Sar4jc@virginia.edu{ 169512235Sar4jc@virginia.edu int index = 0; 169612235Sar4jc@virginia.edu if (process->getSyscallArg(tc, index) != 0) 169712235Sar4jc@virginia.edu { 169812235Sar4jc@virginia.edu warn("prlimit: ignoring rlimits for nonzero pid"); 169912235Sar4jc@virginia.edu return -EPERM; 170012235Sar4jc@virginia.edu } 170112235Sar4jc@virginia.edu int resource = process->getSyscallArg(tc, index); 170212235Sar4jc@virginia.edu Addr n = process->getSyscallArg(tc, index); 170312235Sar4jc@virginia.edu if (n != 0) 170412235Sar4jc@virginia.edu warn("prlimit: ignoring new rlimit"); 170512235Sar4jc@virginia.edu Addr o = process->getSyscallArg(tc, index); 170612235Sar4jc@virginia.edu if (o != 0) 170712235Sar4jc@virginia.edu { 170812416Sqtt2@cornell.edu TypedBufferArg<typename OS::rlimit> rlp(o); 170912235Sar4jc@virginia.edu switch (resource) { 171012235Sar4jc@virginia.edu case OS::TGT_RLIMIT_STACK: 171112235Sar4jc@virginia.edu // max stack size in bytes: make up a number (8MB for now) 171212235Sar4jc@virginia.edu rlp->rlim_cur = rlp->rlim_max = 8 * 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 case OS::TGT_RLIMIT_DATA: 171712235Sar4jc@virginia.edu // max data segment size in bytes: make up a number 171812235Sar4jc@virginia.edu rlp->rlim_cur = rlp->rlim_max = 256*1024*1024; 171912235Sar4jc@virginia.edu rlp->rlim_cur = TheISA::htog(rlp->rlim_cur); 172012235Sar4jc@virginia.edu rlp->rlim_max = TheISA::htog(rlp->rlim_max); 172112235Sar4jc@virginia.edu default: 172212235Sar4jc@virginia.edu warn("prlimit: unimplemented resource %d", resource); 172312235Sar4jc@virginia.edu return -EINVAL; 172412235Sar4jc@virginia.edu break; 172512235Sar4jc@virginia.edu } 172612235Sar4jc@virginia.edu rlp.copyOut(tc->getMemProxy()); 172712235Sar4jc@virginia.edu } 172812235Sar4jc@virginia.edu return 0; 172912235Sar4jc@virginia.edu} 173012235Sar4jc@virginia.edu 173110796Sbrandon.potter@amd.com/// Target clock_gettime() function. 173210796Sbrandon.potter@amd.comtemplate <class OS> 173310796Sbrandon.potter@amd.comSyscallReturn 173411851Sbrandon.potter@amd.comclock_gettimeFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 173510796Sbrandon.potter@amd.com{ 173610796Sbrandon.potter@amd.com int index = 1; 173710796Sbrandon.potter@amd.com //int clk_id = p->getSyscallArg(tc, index); 173810796Sbrandon.potter@amd.com TypedBufferArg<typename OS::timespec> tp(p->getSyscallArg(tc, index)); 173910796Sbrandon.potter@amd.com 174010796Sbrandon.potter@amd.com getElapsedTimeNano(tp->tv_sec, tp->tv_nsec); 174110796Sbrandon.potter@amd.com tp->tv_sec += seconds_since_epoch; 174210796Sbrandon.potter@amd.com tp->tv_sec = TheISA::htog(tp->tv_sec); 174310796Sbrandon.potter@amd.com tp->tv_nsec = TheISA::htog(tp->tv_nsec); 174410796Sbrandon.potter@amd.com 174510796Sbrandon.potter@amd.com tp.copyOut(tc->getMemProxy()); 174610796Sbrandon.potter@amd.com 174710796Sbrandon.potter@amd.com return 0; 174810796Sbrandon.potter@amd.com} 174910796Sbrandon.potter@amd.com 175011337SMichael.Lebeane@amd.com/// Target clock_getres() function. 175111337SMichael.Lebeane@amd.comtemplate <class OS> 175211337SMichael.Lebeane@amd.comSyscallReturn 175311851Sbrandon.potter@amd.comclock_getresFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 175411337SMichael.Lebeane@amd.com{ 175511337SMichael.Lebeane@amd.com int index = 1; 175611337SMichael.Lebeane@amd.com TypedBufferArg<typename OS::timespec> tp(p->getSyscallArg(tc, index)); 175711337SMichael.Lebeane@amd.com 175811337SMichael.Lebeane@amd.com // Set resolution at ns, which is what clock_gettime() returns 175911337SMichael.Lebeane@amd.com tp->tv_sec = 0; 176011337SMichael.Lebeane@amd.com tp->tv_nsec = 1; 176111337SMichael.Lebeane@amd.com 176211337SMichael.Lebeane@amd.com tp.copyOut(tc->getMemProxy()); 176311337SMichael.Lebeane@amd.com 176411337SMichael.Lebeane@amd.com return 0; 176511337SMichael.Lebeane@amd.com} 176611337SMichael.Lebeane@amd.com 1767378SN/A/// Target gettimeofday() handler. 1768360SN/Atemplate <class OS> 17691450SN/ASyscallReturn 177011851Sbrandon.potter@amd.comgettimeofdayFunc(SyscallDesc *desc, int callnum, Process *process, 177111851Sbrandon.potter@amd.com ThreadContext *tc) 1772360SN/A{ 17736701Sgblack@eecs.umich.edu int index = 0; 17746701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::timeval> tp(process->getSyscallArg(tc, index)); 1775360SN/A 177610796Sbrandon.potter@amd.com getElapsedTimeMicro(tp->tv_sec, tp->tv_usec); 1777360SN/A tp->tv_sec += seconds_since_epoch; 17786109Ssanchezd@stanford.edu tp->tv_sec = TheISA::htog(tp->tv_sec); 17796109Ssanchezd@stanford.edu tp->tv_usec = TheISA::htog(tp->tv_usec); 1780360SN/A 17818706Sandreas.hansson@arm.com tp.copyOut(tc->getMemProxy()); 1782360SN/A 17831458SN/A return 0; 1784360SN/A} 1785360SN/A 1786360SN/A 17871999SN/A/// Target utimes() handler. 17881999SN/Atemplate <class OS> 17891999SN/ASyscallReturn 179011851Sbrandon.potter@amd.comutimesFunc(SyscallDesc *desc, int callnum, Process *process, 17912680Sktlim@umich.edu ThreadContext *tc) 17921999SN/A{ 17931999SN/A std::string path; 17941999SN/A 17956701Sgblack@eecs.umich.edu int index = 0; 17968852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 17976701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 17986701Sgblack@eecs.umich.edu return -EFAULT; 17996701Sgblack@eecs.umich.edu } 18001999SN/A 18016701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::timeval [2]> 18026701Sgblack@eecs.umich.edu tp(process->getSyscallArg(tc, index)); 18038706Sandreas.hansson@arm.com tp.copyIn(tc->getMemProxy()); 18041999SN/A 18051999SN/A struct timeval hostTimeval[2]; 180611906SBrandon.Potter@amd.com for (int i = 0; i < 2; ++i) { 18078737Skoansin.tan@gmail.com hostTimeval[i].tv_sec = TheISA::gtoh((*tp)[i].tv_sec); 18088737Skoansin.tan@gmail.com hostTimeval[i].tv_usec = TheISA::gtoh((*tp)[i].tv_usec); 18091999SN/A } 18103669Sbinkertn@umich.edu 18113669Sbinkertn@umich.edu // Adjust path for current working directory 18123669Sbinkertn@umich.edu path = process->fullPath(path); 18133669Sbinkertn@umich.edu 18141999SN/A int result = utimes(path.c_str(), hostTimeval); 18151999SN/A 18161999SN/A if (result < 0) 18171999SN/A return -errno; 18181999SN/A 18191999SN/A return 0; 18201999SN/A} 182111886Sbrandon.potter@amd.com 182211886Sbrandon.potter@amd.comtemplate <class OS> 182311886Sbrandon.potter@amd.comSyscallReturn 182411886Sbrandon.potter@amd.comexecveFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 182511886Sbrandon.potter@amd.com{ 182611886Sbrandon.potter@amd.com desc->setFlags(0); 182711886Sbrandon.potter@amd.com 182811886Sbrandon.potter@amd.com int index = 0; 182911886Sbrandon.potter@amd.com std::string path; 183011886Sbrandon.potter@amd.com SETranslatingPortProxy & mem_proxy = tc->getMemProxy(); 183111886Sbrandon.potter@amd.com if (!mem_proxy.tryReadString(path, p->getSyscallArg(tc, index))) 183211886Sbrandon.potter@amd.com return -EFAULT; 183311886Sbrandon.potter@amd.com 183411886Sbrandon.potter@amd.com if (access(path.c_str(), F_OK) == -1) 183511886Sbrandon.potter@amd.com return -EACCES; 183611886Sbrandon.potter@amd.com 183711886Sbrandon.potter@amd.com auto read_in = [](std::vector<std::string> & vect, 183811886Sbrandon.potter@amd.com SETranslatingPortProxy & mem_proxy, 183911886Sbrandon.potter@amd.com Addr mem_loc) 184011886Sbrandon.potter@amd.com { 184111886Sbrandon.potter@amd.com for (int inc = 0; ; inc++) { 184211886Sbrandon.potter@amd.com BufferArg b((mem_loc + sizeof(Addr) * inc), sizeof(Addr)); 184311886Sbrandon.potter@amd.com b.copyIn(mem_proxy); 184411886Sbrandon.potter@amd.com 184511886Sbrandon.potter@amd.com if (!*(Addr*)b.bufferPtr()) 184611886Sbrandon.potter@amd.com break; 184711886Sbrandon.potter@amd.com 184811886Sbrandon.potter@amd.com vect.push_back(std::string()); 184911886Sbrandon.potter@amd.com mem_proxy.tryReadString(vect[inc], *(Addr*)b.bufferPtr()); 185011886Sbrandon.potter@amd.com } 185111886Sbrandon.potter@amd.com }; 185211886Sbrandon.potter@amd.com 185311886Sbrandon.potter@amd.com /** 185411886Sbrandon.potter@amd.com * Note that ProcessParams is generated by swig and there are no other 185511886Sbrandon.potter@amd.com * examples of how to create anything but this default constructor. The 185611886Sbrandon.potter@amd.com * fields are manually initialized instead of passing parameters to the 185711886Sbrandon.potter@amd.com * constructor. 185811886Sbrandon.potter@amd.com */ 185911886Sbrandon.potter@amd.com ProcessParams *pp = new ProcessParams(); 186011886Sbrandon.potter@amd.com pp->executable = path; 186111886Sbrandon.potter@amd.com Addr argv_mem_loc = p->getSyscallArg(tc, index); 186211886Sbrandon.potter@amd.com read_in(pp->cmd, mem_proxy, argv_mem_loc); 186311886Sbrandon.potter@amd.com Addr envp_mem_loc = p->getSyscallArg(tc, index); 186411886Sbrandon.potter@amd.com read_in(pp->env, mem_proxy, envp_mem_loc); 186511886Sbrandon.potter@amd.com pp->uid = p->uid(); 186611886Sbrandon.potter@amd.com pp->egid = p->egid(); 186711886Sbrandon.potter@amd.com pp->euid = p->euid(); 186811886Sbrandon.potter@amd.com pp->gid = p->gid(); 186911886Sbrandon.potter@amd.com pp->ppid = p->ppid(); 187011886Sbrandon.potter@amd.com pp->pid = p->pid(); 187111886Sbrandon.potter@amd.com pp->input.assign("cin"); 187211886Sbrandon.potter@amd.com pp->output.assign("cout"); 187311886Sbrandon.potter@amd.com pp->errout.assign("cerr"); 187411886Sbrandon.potter@amd.com pp->cwd.assign(p->getcwd()); 187511886Sbrandon.potter@amd.com pp->system = p->system; 187611886Sbrandon.potter@amd.com /** 187711886Sbrandon.potter@amd.com * Prevent process object creation with identical PIDs (which will trip 187811886Sbrandon.potter@amd.com * a fatal check in Process constructor). The execve call is supposed to 187911886Sbrandon.potter@amd.com * take over the currently executing process' identity but replace 188011886Sbrandon.potter@amd.com * whatever it is doing with a new process image. Instead of hijacking 188111886Sbrandon.potter@amd.com * the process object in the simulator, we create a new process object 188211886Sbrandon.potter@amd.com * and bind to the previous process' thread below (hijacking the thread). 188311886Sbrandon.potter@amd.com */ 188411886Sbrandon.potter@amd.com p->system->PIDs.erase(p->pid()); 188511886Sbrandon.potter@amd.com Process *new_p = pp->create(); 188611886Sbrandon.potter@amd.com delete pp; 188711886Sbrandon.potter@amd.com 188811886Sbrandon.potter@amd.com /** 188911886Sbrandon.potter@amd.com * Work through the file descriptor array and close any files marked 189011886Sbrandon.potter@amd.com * close-on-exec. 189111886Sbrandon.potter@amd.com */ 189211886Sbrandon.potter@amd.com new_p->fds = p->fds; 189311886Sbrandon.potter@amd.com for (int i = 0; i < new_p->fds->getSize(); i++) { 189411886Sbrandon.potter@amd.com std::shared_ptr<FDEntry> fdep = (*new_p->fds)[i]; 189511886Sbrandon.potter@amd.com if (fdep && fdep->getCOE()) 189611886Sbrandon.potter@amd.com new_p->fds->closeFDEntry(i); 189711886Sbrandon.potter@amd.com } 189811886Sbrandon.potter@amd.com 189911886Sbrandon.potter@amd.com *new_p->sigchld = true; 190011886Sbrandon.potter@amd.com 190111886Sbrandon.potter@amd.com delete p; 190211886Sbrandon.potter@amd.com tc->clearArchRegs(); 190311886Sbrandon.potter@amd.com tc->setProcessPtr(new_p); 190411886Sbrandon.potter@amd.com new_p->assignThreadContext(tc->contextId()); 190511886Sbrandon.potter@amd.com new_p->initState(); 190611886Sbrandon.potter@amd.com tc->activate(); 190711886Sbrandon.potter@amd.com TheISA::PCState pcState = tc->pcState(); 190811886Sbrandon.potter@amd.com tc->setNPC(pcState.instAddr()); 190911886Sbrandon.potter@amd.com 191011886Sbrandon.potter@amd.com desc->setFlags(SyscallDesc::SuppressReturnValue); 191111886Sbrandon.potter@amd.com return 0; 191211886Sbrandon.potter@amd.com} 191311886Sbrandon.potter@amd.com 1914378SN/A/// Target getrusage() function. 1915360SN/Atemplate <class OS> 19161450SN/ASyscallReturn 191711851Sbrandon.potter@amd.comgetrusageFunc(SyscallDesc *desc, int callnum, Process *process, 19182680Sktlim@umich.edu ThreadContext *tc) 1919360SN/A{ 19206701Sgblack@eecs.umich.edu int index = 0; 19216701Sgblack@eecs.umich.edu int who = process->getSyscallArg(tc, index); // THREAD, SELF, or CHILDREN 19226701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::rusage> rup(process->getSyscallArg(tc, index)); 1923360SN/A 19243670Sbinkertn@umich.edu rup->ru_utime.tv_sec = 0; 19253670Sbinkertn@umich.edu rup->ru_utime.tv_usec = 0; 1926360SN/A rup->ru_stime.tv_sec = 0; 1927360SN/A rup->ru_stime.tv_usec = 0; 1928360SN/A rup->ru_maxrss = 0; 1929360SN/A rup->ru_ixrss = 0; 1930360SN/A rup->ru_idrss = 0; 1931360SN/A rup->ru_isrss = 0; 1932360SN/A rup->ru_minflt = 0; 1933360SN/A rup->ru_majflt = 0; 1934360SN/A rup->ru_nswap = 0; 1935360SN/A rup->ru_inblock = 0; 1936360SN/A rup->ru_oublock = 0; 1937360SN/A rup->ru_msgsnd = 0; 1938360SN/A rup->ru_msgrcv = 0; 1939360SN/A rup->ru_nsignals = 0; 1940360SN/A rup->ru_nvcsw = 0; 1941360SN/A rup->ru_nivcsw = 0; 1942360SN/A 19433670Sbinkertn@umich.edu switch (who) { 19443670Sbinkertn@umich.edu case OS::TGT_RUSAGE_SELF: 194510796Sbrandon.potter@amd.com getElapsedTimeMicro(rup->ru_utime.tv_sec, rup->ru_utime.tv_usec); 19468737Skoansin.tan@gmail.com rup->ru_utime.tv_sec = TheISA::htog(rup->ru_utime.tv_sec); 19478737Skoansin.tan@gmail.com rup->ru_utime.tv_usec = TheISA::htog(rup->ru_utime.tv_usec); 19483670Sbinkertn@umich.edu break; 19493670Sbinkertn@umich.edu 19503670Sbinkertn@umich.edu case OS::TGT_RUSAGE_CHILDREN: 19513670Sbinkertn@umich.edu // do nothing. We have no child processes, so they take no time. 19523670Sbinkertn@umich.edu break; 19533670Sbinkertn@umich.edu 19543670Sbinkertn@umich.edu default: 19553670Sbinkertn@umich.edu // don't really handle THREAD or CHILDREN, but just warn and 19563670Sbinkertn@umich.edu // plow ahead 19573670Sbinkertn@umich.edu warn("getrusage() only supports RUSAGE_SELF. Parameter %d ignored.", 19583670Sbinkertn@umich.edu who); 19593670Sbinkertn@umich.edu } 19603670Sbinkertn@umich.edu 19618706Sandreas.hansson@arm.com rup.copyOut(tc->getMemProxy()); 1962360SN/A 19631458SN/A return 0; 1964360SN/A} 1965360SN/A 19666683Stjones1@inf.ed.ac.uk/// Target times() function. 19676683Stjones1@inf.ed.ac.uktemplate <class OS> 19686683Stjones1@inf.ed.ac.ukSyscallReturn 196911851Sbrandon.potter@amd.comtimesFunc(SyscallDesc *desc, int callnum, Process *process, 197011851Sbrandon.potter@amd.com ThreadContext *tc) 19716683Stjones1@inf.ed.ac.uk{ 19726701Sgblack@eecs.umich.edu int index = 0; 19736701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::tms> bufp(process->getSyscallArg(tc, index)); 19746683Stjones1@inf.ed.ac.uk 19756683Stjones1@inf.ed.ac.uk // Fill in the time structure (in clocks) 19767823Ssteve.reinhardt@amd.com int64_t clocks = curTick() * OS::M5_SC_CLK_TCK / SimClock::Int::s; 19776683Stjones1@inf.ed.ac.uk bufp->tms_utime = clocks; 19786683Stjones1@inf.ed.ac.uk bufp->tms_stime = 0; 19796683Stjones1@inf.ed.ac.uk bufp->tms_cutime = 0; 19806683Stjones1@inf.ed.ac.uk bufp->tms_cstime = 0; 19816683Stjones1@inf.ed.ac.uk 19826683Stjones1@inf.ed.ac.uk // Convert to host endianness 19838737Skoansin.tan@gmail.com bufp->tms_utime = TheISA::htog(bufp->tms_utime); 19846683Stjones1@inf.ed.ac.uk 19856683Stjones1@inf.ed.ac.uk // Write back 19868706Sandreas.hansson@arm.com bufp.copyOut(tc->getMemProxy()); 19876683Stjones1@inf.ed.ac.uk 19886683Stjones1@inf.ed.ac.uk // Return clock ticks since system boot 19896683Stjones1@inf.ed.ac.uk return clocks; 19906683Stjones1@inf.ed.ac.uk} 19912553SN/A 19926684Stjones1@inf.ed.ac.uk/// Target time() function. 19936684Stjones1@inf.ed.ac.uktemplate <class OS> 19946684Stjones1@inf.ed.ac.ukSyscallReturn 199511851Sbrandon.potter@amd.comtimeFunc(SyscallDesc *desc, int callnum, Process *process, ThreadContext *tc) 19966684Stjones1@inf.ed.ac.uk{ 19976684Stjones1@inf.ed.ac.uk typename OS::time_t sec, usec; 199810796Sbrandon.potter@amd.com getElapsedTimeMicro(sec, usec); 19996684Stjones1@inf.ed.ac.uk sec += seconds_since_epoch; 20006684Stjones1@inf.ed.ac.uk 20016701Sgblack@eecs.umich.edu int index = 0; 20026701Sgblack@eecs.umich.edu Addr taddr = (Addr)process->getSyscallArg(tc, index); 200311321Ssteve.reinhardt@amd.com if (taddr != 0) { 20046684Stjones1@inf.ed.ac.uk typename OS::time_t t = sec; 20058737Skoansin.tan@gmail.com t = TheISA::htog(t); 20068852Sandreas.hansson@arm.com SETranslatingPortProxy &p = tc->getMemProxy(); 20078852Sandreas.hansson@arm.com p.writeBlob(taddr, (uint8_t*)&t, (int)sizeof(typename OS::time_t)); 20086684Stjones1@inf.ed.ac.uk } 20096684Stjones1@inf.ed.ac.uk return sec; 20106684Stjones1@inf.ed.ac.uk} 20112553SN/A 201211910SBrandon.Potter@amd.comtemplate <class OS> 201311910SBrandon.Potter@amd.comSyscallReturn 201411910SBrandon.Potter@amd.comtgkillFunc(SyscallDesc *desc, int num, Process *process, ThreadContext *tc) 201511910SBrandon.Potter@amd.com{ 201611910SBrandon.Potter@amd.com int index = 0; 201711910SBrandon.Potter@amd.com int tgid = process->getSyscallArg(tc, index); 201811910SBrandon.Potter@amd.com int tid = process->getSyscallArg(tc, index); 201911910SBrandon.Potter@amd.com int sig = process->getSyscallArg(tc, index); 202011910SBrandon.Potter@amd.com 202111910SBrandon.Potter@amd.com /** 202211910SBrandon.Potter@amd.com * This system call is intended to allow killing a specific thread 202311910SBrandon.Potter@amd.com * within an arbitrary thread group if sanctioned with permission checks. 202411910SBrandon.Potter@amd.com * It's usually true that threads share the termination signal as pointed 202511910SBrandon.Potter@amd.com * out by the pthread_kill man page and this seems to be the intended 202611910SBrandon.Potter@amd.com * usage. Due to this being an emulated environment, assume the following: 202711910SBrandon.Potter@amd.com * Threads are allowed to call tgkill because the EUID for all threads 202811910SBrandon.Potter@amd.com * should be the same. There is no signal handling mechanism for kernel 202911910SBrandon.Potter@amd.com * registration of signal handlers since signals are poorly supported in 203011910SBrandon.Potter@amd.com * emulation mode. Since signal handlers cannot be registered, all 203111910SBrandon.Potter@amd.com * threads within in a thread group must share the termination signal. 203211910SBrandon.Potter@amd.com * We never exhaust PIDs so there's no chance of finding the wrong one 203311910SBrandon.Potter@amd.com * due to PID rollover. 203411910SBrandon.Potter@amd.com */ 203511910SBrandon.Potter@amd.com 203611910SBrandon.Potter@amd.com System *sys = tc->getSystemPtr(); 203711910SBrandon.Potter@amd.com Process *tgt_proc = nullptr; 203811910SBrandon.Potter@amd.com for (int i = 0; i < sys->numContexts(); i++) { 203911910SBrandon.Potter@amd.com Process *temp = sys->threadContexts[i]->getProcessPtr(); 204011910SBrandon.Potter@amd.com if (temp->pid() == tid) { 204111910SBrandon.Potter@amd.com tgt_proc = temp; 204211910SBrandon.Potter@amd.com break; 204311910SBrandon.Potter@amd.com } 204411910SBrandon.Potter@amd.com } 204511910SBrandon.Potter@amd.com 204611910SBrandon.Potter@amd.com if (sig != 0 || sig != OS::TGT_SIGABRT) 204711910SBrandon.Potter@amd.com return -EINVAL; 204811910SBrandon.Potter@amd.com 204911910SBrandon.Potter@amd.com if (tgt_proc == nullptr) 205011910SBrandon.Potter@amd.com return -ESRCH; 205111910SBrandon.Potter@amd.com 205211910SBrandon.Potter@amd.com if (tgid != -1 && tgt_proc->tgid() != tgid) 205311910SBrandon.Potter@amd.com return -ESRCH; 205411910SBrandon.Potter@amd.com 205511910SBrandon.Potter@amd.com if (sig == OS::TGT_SIGABRT) 205611910SBrandon.Potter@amd.com exitGroupFunc(desc, 252, process, tc); 205711910SBrandon.Potter@amd.com 205811910SBrandon.Potter@amd.com return 0; 205911910SBrandon.Potter@amd.com} 206011910SBrandon.Potter@amd.com 20612553SN/A 20621354SN/A#endif // __SIM_SYSCALL_EMUL_HH__ 2063