syscall_emul.hh revision 13557
1360SN/A/* 210850SGiacomo.Gabrielli@arm.com * Copyright (c) 2012-2013, 2015 ARM Limited 310796Sbrandon.potter@amd.com * Copyright (c) 2015 Advanced Micro Devices, Inc. 410027SChris.Adeniyi-Jones@arm.com * All rights reserved 510027SChris.Adeniyi-Jones@arm.com * 610027SChris.Adeniyi-Jones@arm.com * The license below extends only to copyright in the software and shall 710027SChris.Adeniyi-Jones@arm.com * not be construed as granting a license to any other intellectual 810027SChris.Adeniyi-Jones@arm.com * property including but not limited to intellectual property relating 910027SChris.Adeniyi-Jones@arm.com * to a hardware implementation of the functionality of the software 1010027SChris.Adeniyi-Jones@arm.com * licensed hereunder. You may use the software subject to the license 1110027SChris.Adeniyi-Jones@arm.com * terms below provided that you ensure that this notice is replicated 1210027SChris.Adeniyi-Jones@arm.com * unmodified and in its entirety in all distributions of the software, 1310027SChris.Adeniyi-Jones@arm.com * modified or unmodified, in source code or in binary form. 1410027SChris.Adeniyi-Jones@arm.com * 151458SN/A * Copyright (c) 2003-2005 The Regents of The University of Michigan 16360SN/A * All rights reserved. 17360SN/A * 18360SN/A * Redistribution and use in source and binary forms, with or without 19360SN/A * modification, are permitted provided that the following conditions are 20360SN/A * met: redistributions of source code must retain the above copyright 21360SN/A * notice, this list of conditions and the following disclaimer; 22360SN/A * redistributions in binary form must reproduce the above copyright 23360SN/A * notice, this list of conditions and the following disclaimer in the 24360SN/A * documentation and/or other materials provided with the distribution; 25360SN/A * neither the name of the copyright holders nor the names of its 26360SN/A * contributors may be used to endorse or promote products derived from 27360SN/A * this software without specific prior written permission. 28360SN/A * 29360SN/A * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 30360SN/A * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 31360SN/A * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 32360SN/A * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 33360SN/A * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 34360SN/A * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 35360SN/A * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 36360SN/A * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 37360SN/A * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 38360SN/A * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 39360SN/A * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 402665Ssaidi@eecs.umich.edu * 412665Ssaidi@eecs.umich.edu * Authors: Steve Reinhardt 422665Ssaidi@eecs.umich.edu * Kevin Lim 43360SN/A */ 44360SN/A 451354SN/A#ifndef __SIM_SYSCALL_EMUL_HH__ 461354SN/A#define __SIM_SYSCALL_EMUL_HH__ 47360SN/A 4812018Sandreas.sandberg@arm.com#if (defined(__APPLE__) || defined(__OpenBSD__) || \ 4912018Sandreas.sandberg@arm.com defined(__FreeBSD__) || defined(__CYGWIN__) || \ 5012018Sandreas.sandberg@arm.com defined(__NetBSD__)) 5112018Sandreas.sandberg@arm.com#define NO_STAT64 1 5212018Sandreas.sandberg@arm.com#else 5312018Sandreas.sandberg@arm.com#define NO_STAT64 0 5412018Sandreas.sandberg@arm.com#endif 552064SN/A 5612018Sandreas.sandberg@arm.com#if (defined(__APPLE__) || defined(__OpenBSD__) || \ 5712018Sandreas.sandberg@arm.com defined(__FreeBSD__) || defined(__NetBSD__)) 5812018Sandreas.sandberg@arm.com#define NO_STATFS 1 5912018Sandreas.sandberg@arm.com#else 6012018Sandreas.sandberg@arm.com#define NO_STATFS 0 6112018Sandreas.sandberg@arm.com#endif 6211799Sbrandon.potter@amd.com 6312018Sandreas.sandberg@arm.com#if (defined(__APPLE__) || defined(__OpenBSD__) || \ 6412018Sandreas.sandberg@arm.com defined(__FreeBSD__) || defined(__NetBSD__)) 6512018Sandreas.sandberg@arm.com#define NO_FALLOCATE 1 6612018Sandreas.sandberg@arm.com#else 6712018Sandreas.sandberg@arm.com#define NO_FALLOCATE 0 6812018Sandreas.sandberg@arm.com#endif 6911799Sbrandon.potter@amd.com 70360SN/A/// 71360SN/A/// @file syscall_emul.hh 72360SN/A/// 73360SN/A/// This file defines objects used to emulate syscalls from the target 74360SN/A/// application on the host machine. 75360SN/A 761809SN/A#ifdef __CYGWIN32__ 7711800Sbrandon.potter@amd.com#include <sys/fcntl.h> 7811392Sbrandon.potter@amd.com 791809SN/A#endif 8011392Sbrandon.potter@amd.com#include <fcntl.h> 8111383Sbrandon.potter@amd.com#include <sys/mman.h> 823113Sgblack@eecs.umich.edu#include <sys/stat.h> 8311799Sbrandon.potter@amd.com#if (NO_STATFS == 0) 8411759Sbrandon.potter@amd.com#include <sys/statfs.h> 8511812Sbaz21@cam.ac.uk#else 8611812Sbaz21@cam.ac.uk#include <sys/mount.h> 8711799Sbrandon.potter@amd.com#endif 888229Snate@binkert.org#include <sys/time.h> 898229Snate@binkert.org#include <sys/uio.h> 9011594Santhony.gutierrez@amd.com#include <unistd.h> 917075Snate@binkert.org 928229Snate@binkert.org#include <cerrno> 9311856Sbrandon.potter@amd.com#include <memory> 947075Snate@binkert.org#include <string> 95360SN/A 9612461Sgabeblack@google.com#include "arch/generic/tlb.hh" 9711886Sbrandon.potter@amd.com#include "arch/utility.hh" 9811800Sbrandon.potter@amd.com#include "base/intmath.hh" 9911392Sbrandon.potter@amd.com#include "base/loader/object_file.hh" 10012334Sgabeblack@google.com#include "base/logging.hh" 1011354SN/A#include "base/trace.hh" 1026216Snate@binkert.org#include "base/types.hh" 1036658Snate@binkert.org#include "config/the_isa.hh" 1042474SN/A#include "cpu/base.hh" 1052680Sktlim@umich.edu#include "cpu/thread_context.hh" 1068229Snate@binkert.org#include "mem/page_table.hh" 10711886Sbrandon.potter@amd.com#include "params/Process.hh" 10810496Ssteve.reinhardt@amd.com#include "sim/emul_driver.hh" 10911911SBrandon.Potter@amd.com#include "sim/futex_map.hh" 1108229Snate@binkert.org#include "sim/process.hh" 11111794Sbrandon.potter@amd.com#include "sim/syscall_debug_macros.hh" 11211886Sbrandon.potter@amd.com#include "sim/syscall_desc.hh" 11310497Ssteve.reinhardt@amd.com#include "sim/syscall_emul_buf.hh" 11411794Sbrandon.potter@amd.com#include "sim/syscall_return.hh" 115360SN/A 116360SN/A////////////////////////////////////////////////////////////////////// 117360SN/A// 118360SN/A// The following emulation functions are generic enough that they 119360SN/A// don't need to be recompiled for different emulated OS's. They are 120360SN/A// defined in sim/syscall_emul.cc. 121360SN/A// 122360SN/A////////////////////////////////////////////////////////////////////// 123360SN/A 124360SN/A 125378SN/A/// Handler for unimplemented syscalls that we haven't thought about. 1261706SN/ASyscallReturn unimplementedFunc(SyscallDesc *desc, int num, 12711851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 128378SN/A 129378SN/A/// Handler for unimplemented syscalls that we never intend to 130378SN/A/// implement (signal handling, etc.) and should not affect the correct 131378SN/A/// behavior of the program. Print a warning only if the appropriate 132378SN/A/// trace flag is enabled. Return success to the target program. 1331706SN/ASyscallReturn ignoreFunc(SyscallDesc *desc, int num, 13411851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 135360SN/A 13611760Sbrandon.potter@amd.com// Target fallocateFunc() handler. 13711760Sbrandon.potter@amd.comSyscallReturn fallocateFunc(SyscallDesc *desc, int num, 13811851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 13911760Sbrandon.potter@amd.com 1406109Ssanchezd@stanford.edu/// Target exit() handler: terminate current context. 1411706SN/ASyscallReturn exitFunc(SyscallDesc *desc, int num, 14211851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 143378SN/A 1446109Ssanchezd@stanford.edu/// Target exit_group() handler: terminate simulation. (exit all threads) 1456109Ssanchezd@stanford.eduSyscallReturn exitGroupFunc(SyscallDesc *desc, int num, 14611851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 1476109Ssanchezd@stanford.edu 14811886Sbrandon.potter@amd.com/// Target set_tid_address() handler. 14911886Sbrandon.potter@amd.comSyscallReturn setTidAddressFunc(SyscallDesc *desc, int num, 15011886Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 15111886Sbrandon.potter@amd.com 152378SN/A/// Target getpagesize() handler. 1531706SN/ASyscallReturn getpagesizeFunc(SyscallDesc *desc, int num, 15411851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 155378SN/A 1565748SSteve.Reinhardt@amd.com/// Target brk() handler: set brk address. 1575748SSteve.Reinhardt@amd.comSyscallReturn brkFunc(SyscallDesc *desc, int num, 15811851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 159378SN/A 160378SN/A/// Target close() handler. 1611706SN/ASyscallReturn closeFunc(SyscallDesc *desc, int num, 16211851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 163378SN/A 16411886Sbrandon.potter@amd.com// Target read() handler. 1651706SN/ASyscallReturn readFunc(SyscallDesc *desc, int num, 16611851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 167378SN/A 168378SN/A/// Target write() handler. 1691706SN/ASyscallReturn writeFunc(SyscallDesc *desc, int num, 17011851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 171378SN/A 172378SN/A/// Target lseek() handler. 1731706SN/ASyscallReturn lseekFunc(SyscallDesc *desc, int num, 17411851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 175378SN/A 1764118Sgblack@eecs.umich.edu/// Target _llseek() handler. 1774118Sgblack@eecs.umich.eduSyscallReturn _llseekFunc(SyscallDesc *desc, int num, 17811851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 1794118Sgblack@eecs.umich.edu 180378SN/A/// Target munmap() handler. 1811706SN/ASyscallReturn munmapFunc(SyscallDesc *desc, int num, 18211851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 183378SN/A 184378SN/A/// Target gethostname() handler. 1851706SN/ASyscallReturn gethostnameFunc(SyscallDesc *desc, int num, 18611851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 187360SN/A 1885513SMichael.Adler@intel.com/// Target getcwd() handler. 1895513SMichael.Adler@intel.comSyscallReturn getcwdFunc(SyscallDesc *desc, int num, 19011851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 1915513SMichael.Adler@intel.com 19210203SAli.Saidi@ARM.com/// Target readlink() handler. 19310203SAli.Saidi@ARM.comSyscallReturn readlinkFunc(SyscallDesc *desc, int num, 19411851Sbrandon.potter@amd.com Process *p, ThreadContext *tc, 19510203SAli.Saidi@ARM.com int index = 0); 1965513SMichael.Adler@intel.comSyscallReturn readlinkFunc(SyscallDesc *desc, int num, 19711851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 1985513SMichael.Adler@intel.com 199511SN/A/// Target unlink() handler. 20010633Smichaelupton@gmail.comSyscallReturn unlinkHelper(SyscallDesc *desc, int num, 20111851Sbrandon.potter@amd.com Process *p, ThreadContext *tc, 20210633Smichaelupton@gmail.com int index); 2031706SN/ASyscallReturn unlinkFunc(SyscallDesc *desc, int num, 20411851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 205511SN/A 20612795Smattdsinclair@gmail.com/// Target link() handler 20712795Smattdsinclair@gmail.comSyscallReturn linkFunc(SyscallDesc *desc, int num, Process *p, 20812795Smattdsinclair@gmail.com ThreadContext *tc); 20912795Smattdsinclair@gmail.com 21012796Smattdsinclair@gmail.com/// Target symlink() handler. 21112796Smattdsinclair@gmail.comSyscallReturn symlinkFunc(SyscallDesc *desc, int num, Process *p, 21212796Smattdsinclair@gmail.com ThreadContext *tc); 21312796Smattdsinclair@gmail.com 2145513SMichael.Adler@intel.com/// Target mkdir() handler. 2155513SMichael.Adler@intel.comSyscallReturn mkdirFunc(SyscallDesc *desc, int num, 21611851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2175513SMichael.Adler@intel.com 21813031Sbrandon.potter@amd.com/// Target mknod() handler. 21913031Sbrandon.potter@amd.comSyscallReturn mknodFunc(SyscallDesc *desc, int num, 22013031Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 22113031Sbrandon.potter@amd.com 22213031Sbrandon.potter@amd.com/// Target chdir() handler. 22313031Sbrandon.potter@amd.comSyscallReturn chdirFunc(SyscallDesc *desc, int num, 22413031Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 22513031Sbrandon.potter@amd.com 22613031Sbrandon.potter@amd.com// Target rmdir() handler. 22713031Sbrandon.potter@amd.comSyscallReturn rmdirFunc(SyscallDesc *desc, int num, 22813031Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 22913031Sbrandon.potter@amd.com 230511SN/A/// Target rename() handler. 2311706SN/ASyscallReturn renameFunc(SyscallDesc *desc, int num, 23211851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2331706SN/A 2341706SN/A 2351706SN/A/// Target truncate() handler. 2361706SN/ASyscallReturn truncateFunc(SyscallDesc *desc, int num, 23711851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2381706SN/A 2391706SN/A 2401706SN/A/// Target ftruncate() handler. 2411706SN/ASyscallReturn ftruncateFunc(SyscallDesc *desc, int num, 24211851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2431706SN/A 244511SN/A 2456703Svince@csl.cornell.edu/// Target truncate64() handler. 2466703Svince@csl.cornell.eduSyscallReturn truncate64Func(SyscallDesc *desc, int num, 24711851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2486703Svince@csl.cornell.edu 2496685Stjones1@inf.ed.ac.uk/// Target ftruncate64() handler. 2506685Stjones1@inf.ed.ac.ukSyscallReturn ftruncate64Func(SyscallDesc *desc, int num, 25111851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2526685Stjones1@inf.ed.ac.uk 2536685Stjones1@inf.ed.ac.uk 2545513SMichael.Adler@intel.com/// Target umask() handler. 2555513SMichael.Adler@intel.comSyscallReturn umaskFunc(SyscallDesc *desc, int num, 25611851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2575513SMichael.Adler@intel.com 25811885Sbrandon.potter@amd.com/// Target gettid() handler. 25911885Sbrandon.potter@amd.comSyscallReturn gettidFunc(SyscallDesc *desc, int num, 26011885Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2615513SMichael.Adler@intel.com 2621999SN/A/// Target chown() handler. 2631999SN/ASyscallReturn chownFunc(SyscallDesc *desc, int num, 26411851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2651999SN/A 26611885Sbrandon.potter@amd.com/// Target setpgid() handler. 26711885Sbrandon.potter@amd.comSyscallReturn setpgidFunc(SyscallDesc *desc, int num, 26811885Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2691999SN/A 2701999SN/A/// Target fchown() handler. 2711999SN/ASyscallReturn fchownFunc(SyscallDesc *desc, int num, 27211851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2731999SN/A 2743079Sstever@eecs.umich.edu/// Target dup() handler. 2753079Sstever@eecs.umich.eduSyscallReturn dupFunc(SyscallDesc *desc, int num, 27611851Sbrandon.potter@amd.com Process *process, ThreadContext *tc); 2773079Sstever@eecs.umich.edu 27811908SBrandon.Potter@amd.com/// Target dup2() handler. 27911908SBrandon.Potter@amd.comSyscallReturn dup2Func(SyscallDesc *desc, int num, 28011908SBrandon.Potter@amd.com Process *process, ThreadContext *tc); 28111908SBrandon.Potter@amd.com 28211875Sbrandon.potter@amd.com/// Target fcntl() handler. 2832093SN/ASyscallReturn fcntlFunc(SyscallDesc *desc, int num, 28411851Sbrandon.potter@amd.com Process *process, ThreadContext *tc); 2852093SN/A 2862687Sksewell@umich.edu/// Target fcntl64() handler. 2872687Sksewell@umich.eduSyscallReturn fcntl64Func(SyscallDesc *desc, int num, 28811851Sbrandon.potter@amd.com Process *process, ThreadContext *tc); 2892687Sksewell@umich.edu 2902238SN/A/// Target setuid() handler. 2912238SN/ASyscallReturn setuidFunc(SyscallDesc *desc, int num, 29211851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2932238SN/A 29411908SBrandon.Potter@amd.com/// Target pipe() handler. 29511908SBrandon.Potter@amd.comSyscallReturn pipeFunc(SyscallDesc *desc, int num, 29611908SBrandon.Potter@amd.com Process *p, ThreadContext *tc); 29711908SBrandon.Potter@amd.com 29811908SBrandon.Potter@amd.com/// Internal pipe() handler. 29911908SBrandon.Potter@amd.comSyscallReturn pipeImpl(SyscallDesc *desc, int num, Process *p, 30011908SBrandon.Potter@amd.com ThreadContext *tc, bool pseudoPipe); 30111908SBrandon.Potter@amd.com 3022238SN/A/// Target getpid() handler. 3032238SN/ASyscallReturn getpidFunc(SyscallDesc *desc, int num, 30411851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3052238SN/A 30613448Sciro.santilli@arm.com#if defined(SYS_getdents) 30713031Sbrandon.potter@amd.com// Target getdents() handler. 30813031Sbrandon.potter@amd.comSyscallReturn getdentsFunc(SyscallDesc *desc, int num, 30913031Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 31013448Sciro.santilli@arm.com#endif 31113031Sbrandon.potter@amd.com 31213539Sjavier.setoain@arm.com#if defined(SYS_getdents64) 31313539Sjavier.setoain@arm.com// Target getdents() handler. 31413539Sjavier.setoain@arm.comSyscallReturn getdents64Func(SyscallDesc *desc, int num, 31513539Sjavier.setoain@arm.com Process *p, ThreadContext *tc); 31613539Sjavier.setoain@arm.com#endif 31713539Sjavier.setoain@arm.com 31813031Sbrandon.potter@amd.com// Target getuid() handler. 3192238SN/ASyscallReturn getuidFunc(SyscallDesc *desc, int num, 32011851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3212238SN/A 3222238SN/A/// Target getgid() handler. 3232238SN/ASyscallReturn getgidFunc(SyscallDesc *desc, int num, 32411851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3252238SN/A 3262238SN/A/// Target getppid() handler. 3272238SN/ASyscallReturn getppidFunc(SyscallDesc *desc, int num, 32811851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3292238SN/A 3302238SN/A/// Target geteuid() handler. 3312238SN/ASyscallReturn geteuidFunc(SyscallDesc *desc, int num, 33211851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3332238SN/A 3342238SN/A/// Target getegid() handler. 3352238SN/ASyscallReturn getegidFunc(SyscallDesc *desc, int num, 33611851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3372238SN/A 3389455Smitch.hayenga+gem5@gmail.com/// Target access() handler 3399455Smitch.hayenga+gem5@gmail.comSyscallReturn accessFunc(SyscallDesc *desc, int num, 34011851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 34110203SAli.Saidi@ARM.comSyscallReturn accessFunc(SyscallDesc *desc, int num, 34211851Sbrandon.potter@amd.com Process *p, ThreadContext *tc, 34311851Sbrandon.potter@amd.com int index); 3449455Smitch.hayenga+gem5@gmail.com 3459112Smarc.orr@gmail.com/// Futex system call 34611906SBrandon.Potter@amd.com/// Implemented by Daniel Sanchez 34711906SBrandon.Potter@amd.com/// Used by printf's in multi-threaded apps 3489112Smarc.orr@gmail.comtemplate <class OS> 3499112Smarc.orr@gmail.comSyscallReturn 35011851Sbrandon.potter@amd.comfutexFunc(SyscallDesc *desc, int callnum, Process *process, 3519112Smarc.orr@gmail.com ThreadContext *tc) 3529112Smarc.orr@gmail.com{ 35311911SBrandon.Potter@amd.com using namespace std; 3549112Smarc.orr@gmail.com 35511911SBrandon.Potter@amd.com int index = 0; 35611911SBrandon.Potter@amd.com Addr uaddr = process->getSyscallArg(tc, index); 35711911SBrandon.Potter@amd.com int op = process->getSyscallArg(tc, index); 35811911SBrandon.Potter@amd.com int val = process->getSyscallArg(tc, index); 3599112Smarc.orr@gmail.com 36011911SBrandon.Potter@amd.com /* 36111911SBrandon.Potter@amd.com * Unsupported option that does not affect the correctness of the 36211911SBrandon.Potter@amd.com * application. This is a performance optimization utilized by Linux. 36311911SBrandon.Potter@amd.com */ 3649238Slluc.alvarez@bsc.es op &= ~OS::TGT_FUTEX_PRIVATE_FLAG; 3659112Smarc.orr@gmail.com 36611911SBrandon.Potter@amd.com FutexMap &futex_map = tc->getSystemPtr()->futexMap; 3679112Smarc.orr@gmail.com 36811911SBrandon.Potter@amd.com if (OS::TGT_FUTEX_WAIT == op) { 36911911SBrandon.Potter@amd.com // Ensure futex system call accessed atomically. 37011911SBrandon.Potter@amd.com BufferArg buf(uaddr, sizeof(int)); 37111911SBrandon.Potter@amd.com buf.copyIn(tc->getMemProxy()); 37211911SBrandon.Potter@amd.com int mem_val = *(int*)buf.bufferPtr(); 3739112Smarc.orr@gmail.com 37411911SBrandon.Potter@amd.com /* 37511911SBrandon.Potter@amd.com * The value in memory at uaddr is not equal with the expected val 37611911SBrandon.Potter@amd.com * (a different thread must have changed it before the system call was 37711911SBrandon.Potter@amd.com * invoked). In this case, we need to throw an error. 37811911SBrandon.Potter@amd.com */ 37911911SBrandon.Potter@amd.com if (val != mem_val) 3809112Smarc.orr@gmail.com return -OS::TGT_EWOULDBLOCK; 3819112Smarc.orr@gmail.com 38211911SBrandon.Potter@amd.com futex_map.suspend(uaddr, process->tgid(), tc); 38311911SBrandon.Potter@amd.com 3849112Smarc.orr@gmail.com return 0; 38511911SBrandon.Potter@amd.com } else if (OS::TGT_FUTEX_WAKE == op) { 38611911SBrandon.Potter@amd.com return futex_map.wakeup(uaddr, process->tgid(), val); 3879112Smarc.orr@gmail.com } 3889112Smarc.orr@gmail.com 38911911SBrandon.Potter@amd.com warn("futex: op %d not implemented; ignoring.", op); 39011911SBrandon.Potter@amd.com return -ENOSYS; 3919112Smarc.orr@gmail.com} 3929112Smarc.orr@gmail.com 3932238SN/A 3942238SN/A/// Pseudo Funcs - These functions use a different return convension, 3952238SN/A/// returning a second value in a register other than the normal return register 3962238SN/ASyscallReturn pipePseudoFunc(SyscallDesc *desc, int num, 39711851Sbrandon.potter@amd.com Process *process, ThreadContext *tc); 3982238SN/A 3992238SN/A/// Target getpidPseudo() handler. 4002238SN/ASyscallReturn getpidPseudoFunc(SyscallDesc *desc, int num, 40111851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 4022238SN/A 4032238SN/A/// Target getuidPseudo() handler. 4042238SN/ASyscallReturn getuidPseudoFunc(SyscallDesc *desc, int num, 40511851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 4062238SN/A 4072238SN/A/// Target getgidPseudo() handler. 4082238SN/ASyscallReturn getgidPseudoFunc(SyscallDesc *desc, int num, 40911851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 4102238SN/A 4112238SN/A 4121354SN/A/// A readable name for 1,000,000, for converting microseconds to seconds. 4131354SN/Aconst int one_million = 1000000; 41410796Sbrandon.potter@amd.com/// A readable name for 1,000,000,000, for converting nanoseconds to seconds. 41510796Sbrandon.potter@amd.comconst int one_billion = 1000000000; 4161354SN/A 4171354SN/A/// Approximate seconds since the epoch (1/1/1970). About a billion, 4181354SN/A/// by my reckoning. We want to keep this a constant (not use the 4191354SN/A/// real-world time) to keep simulations repeatable. 4201354SN/Aconst unsigned seconds_since_epoch = 1000000000; 4211354SN/A 4221354SN/A/// Helper function to convert current elapsed time to seconds and 4231354SN/A/// microseconds. 4241354SN/Atemplate <class T1, class T2> 4251354SN/Avoid 42610796Sbrandon.potter@amd.comgetElapsedTimeMicro(T1 &sec, T2 &usec) 4271354SN/A{ 42810796Sbrandon.potter@amd.com uint64_t elapsed_usecs = curTick() / SimClock::Int::us; 4291354SN/A sec = elapsed_usecs / one_million; 4301354SN/A usec = elapsed_usecs % one_million; 4311354SN/A} 4321354SN/A 43310796Sbrandon.potter@amd.com/// Helper function to convert current elapsed time to seconds and 43410796Sbrandon.potter@amd.com/// nanoseconds. 43510796Sbrandon.potter@amd.comtemplate <class T1, class T2> 43610796Sbrandon.potter@amd.comvoid 43710796Sbrandon.potter@amd.comgetElapsedTimeNano(T1 &sec, T2 &nsec) 43810796Sbrandon.potter@amd.com{ 43910796Sbrandon.potter@amd.com uint64_t elapsed_nsecs = curTick() / SimClock::Int::ns; 44010796Sbrandon.potter@amd.com sec = elapsed_nsecs / one_billion; 44110796Sbrandon.potter@amd.com nsec = elapsed_nsecs % one_billion; 44210796Sbrandon.potter@amd.com} 44310796Sbrandon.potter@amd.com 444360SN/A////////////////////////////////////////////////////////////////////// 445360SN/A// 446360SN/A// The following emulation functions are generic, but need to be 447360SN/A// templated to account for differences in types, constants, etc. 448360SN/A// 449360SN/A////////////////////////////////////////////////////////////////////// 450360SN/A 45111759Sbrandon.potter@amd.com typedef struct statfs hst_statfs; 4523113Sgblack@eecs.umich.edu#if NO_STAT64 4533113Sgblack@eecs.umich.edu typedef struct stat hst_stat; 4543113Sgblack@eecs.umich.edu typedef struct stat hst_stat64; 4553113Sgblack@eecs.umich.edu#else 4563113Sgblack@eecs.umich.edu typedef struct stat hst_stat; 4573113Sgblack@eecs.umich.edu typedef struct stat64 hst_stat64; 4583113Sgblack@eecs.umich.edu#endif 4593113Sgblack@eecs.umich.edu 4603113Sgblack@eecs.umich.edu//// Helper function to convert a host stat buffer to a target stat 4613113Sgblack@eecs.umich.edu//// buffer. Also copies the target buffer out to the simulated 4623113Sgblack@eecs.umich.edu//// memory space. Used by stat(), fstat(), and lstat(). 4633113Sgblack@eecs.umich.edu 4643113Sgblack@eecs.umich.edutemplate <typename target_stat, typename host_stat> 46512032Sandreas.sandberg@arm.comvoid 4663113Sgblack@eecs.umich.educonvertStatBuf(target_stat &tgt, host_stat *host, bool fakeTTY = false) 4673113Sgblack@eecs.umich.edu{ 4684189Sgblack@eecs.umich.edu using namespace TheISA; 4694189Sgblack@eecs.umich.edu 4703113Sgblack@eecs.umich.edu if (fakeTTY) 4713113Sgblack@eecs.umich.edu tgt->st_dev = 0xA; 4723113Sgblack@eecs.umich.edu else 4733113Sgblack@eecs.umich.edu tgt->st_dev = host->st_dev; 4748737Skoansin.tan@gmail.com tgt->st_dev = TheISA::htog(tgt->st_dev); 4753113Sgblack@eecs.umich.edu tgt->st_ino = host->st_ino; 4768737Skoansin.tan@gmail.com tgt->st_ino = TheISA::htog(tgt->st_ino); 4773277Sgblack@eecs.umich.edu tgt->st_mode = host->st_mode; 4785515SMichael.Adler@intel.com if (fakeTTY) { 4795515SMichael.Adler@intel.com // Claim to be a character device 4805515SMichael.Adler@intel.com tgt->st_mode &= ~S_IFMT; // Clear S_IFMT 4815515SMichael.Adler@intel.com tgt->st_mode |= S_IFCHR; // Set S_IFCHR 4825515SMichael.Adler@intel.com } 4838737Skoansin.tan@gmail.com tgt->st_mode = TheISA::htog(tgt->st_mode); 4843277Sgblack@eecs.umich.edu tgt->st_nlink = host->st_nlink; 4858737Skoansin.tan@gmail.com tgt->st_nlink = TheISA::htog(tgt->st_nlink); 4863277Sgblack@eecs.umich.edu tgt->st_uid = host->st_uid; 4878737Skoansin.tan@gmail.com tgt->st_uid = TheISA::htog(tgt->st_uid); 4883277Sgblack@eecs.umich.edu tgt->st_gid = host->st_gid; 4898737Skoansin.tan@gmail.com tgt->st_gid = TheISA::htog(tgt->st_gid); 4903113Sgblack@eecs.umich.edu if (fakeTTY) 4913113Sgblack@eecs.umich.edu tgt->st_rdev = 0x880d; 4923113Sgblack@eecs.umich.edu else 4933113Sgblack@eecs.umich.edu tgt->st_rdev = host->st_rdev; 4948737Skoansin.tan@gmail.com tgt->st_rdev = TheISA::htog(tgt->st_rdev); 4953113Sgblack@eecs.umich.edu tgt->st_size = host->st_size; 4968737Skoansin.tan@gmail.com tgt->st_size = TheISA::htog(tgt->st_size); 4973114Sgblack@eecs.umich.edu tgt->st_atimeX = host->st_atime; 4988737Skoansin.tan@gmail.com tgt->st_atimeX = TheISA::htog(tgt->st_atimeX); 4993114Sgblack@eecs.umich.edu tgt->st_mtimeX = host->st_mtime; 5008737Skoansin.tan@gmail.com tgt->st_mtimeX = TheISA::htog(tgt->st_mtimeX); 5013114Sgblack@eecs.umich.edu tgt->st_ctimeX = host->st_ctime; 5028737Skoansin.tan@gmail.com tgt->st_ctimeX = TheISA::htog(tgt->st_ctimeX); 50311906SBrandon.Potter@amd.com // Force the block size to be 8KB. This helps to ensure buffered io works 5044061Sgblack@eecs.umich.edu // consistently across different hosts. 5054061Sgblack@eecs.umich.edu tgt->st_blksize = 0x2000; 5068737Skoansin.tan@gmail.com tgt->st_blksize = TheISA::htog(tgt->st_blksize); 5073113Sgblack@eecs.umich.edu tgt->st_blocks = host->st_blocks; 5088737Skoansin.tan@gmail.com tgt->st_blocks = TheISA::htog(tgt->st_blocks); 5093113Sgblack@eecs.umich.edu} 5103113Sgblack@eecs.umich.edu 5113113Sgblack@eecs.umich.edu// Same for stat64 5123113Sgblack@eecs.umich.edu 5133113Sgblack@eecs.umich.edutemplate <typename target_stat, typename host_stat64> 51412032Sandreas.sandberg@arm.comvoid 5153113Sgblack@eecs.umich.educonvertStat64Buf(target_stat &tgt, host_stat64 *host, bool fakeTTY = false) 5163113Sgblack@eecs.umich.edu{ 5174189Sgblack@eecs.umich.edu using namespace TheISA; 5184189Sgblack@eecs.umich.edu 5193113Sgblack@eecs.umich.edu convertStatBuf<target_stat, host_stat64>(tgt, host, fakeTTY); 5203113Sgblack@eecs.umich.edu#if defined(STAT_HAVE_NSEC) 5213113Sgblack@eecs.umich.edu tgt->st_atime_nsec = host->st_atime_nsec; 5228737Skoansin.tan@gmail.com tgt->st_atime_nsec = TheISA::htog(tgt->st_atime_nsec); 5233113Sgblack@eecs.umich.edu tgt->st_mtime_nsec = host->st_mtime_nsec; 5248737Skoansin.tan@gmail.com tgt->st_mtime_nsec = TheISA::htog(tgt->st_mtime_nsec); 5253113Sgblack@eecs.umich.edu tgt->st_ctime_nsec = host->st_ctime_nsec; 5268737Skoansin.tan@gmail.com tgt->st_ctime_nsec = TheISA::htog(tgt->st_ctime_nsec); 5273113Sgblack@eecs.umich.edu#else 5283113Sgblack@eecs.umich.edu tgt->st_atime_nsec = 0; 5293113Sgblack@eecs.umich.edu tgt->st_mtime_nsec = 0; 5303113Sgblack@eecs.umich.edu tgt->st_ctime_nsec = 0; 5313113Sgblack@eecs.umich.edu#endif 5323113Sgblack@eecs.umich.edu} 5333113Sgblack@eecs.umich.edu 53411906SBrandon.Potter@amd.com// Here are a couple of convenience functions 5353113Sgblack@eecs.umich.edutemplate<class OS> 53612032Sandreas.sandberg@arm.comvoid 5378852Sandreas.hansson@arm.comcopyOutStatBuf(SETranslatingPortProxy &mem, Addr addr, 53811906SBrandon.Potter@amd.com hst_stat *host, bool fakeTTY = false) 5393113Sgblack@eecs.umich.edu{ 5403113Sgblack@eecs.umich.edu typedef TypedBufferArg<typename OS::tgt_stat> tgt_stat_buf; 5413113Sgblack@eecs.umich.edu tgt_stat_buf tgt(addr); 5423113Sgblack@eecs.umich.edu convertStatBuf<tgt_stat_buf, hst_stat>(tgt, host, fakeTTY); 5433113Sgblack@eecs.umich.edu tgt.copyOut(mem); 5443113Sgblack@eecs.umich.edu} 5453113Sgblack@eecs.umich.edu 5463113Sgblack@eecs.umich.edutemplate<class OS> 54712032Sandreas.sandberg@arm.comvoid 5488852Sandreas.hansson@arm.comcopyOutStat64Buf(SETranslatingPortProxy &mem, Addr addr, 54911906SBrandon.Potter@amd.com hst_stat64 *host, bool fakeTTY = false) 5503113Sgblack@eecs.umich.edu{ 5513113Sgblack@eecs.umich.edu typedef TypedBufferArg<typename OS::tgt_stat64> tgt_stat_buf; 5523113Sgblack@eecs.umich.edu tgt_stat_buf tgt(addr); 5536686Stjones1@inf.ed.ac.uk convertStat64Buf<tgt_stat_buf, hst_stat64>(tgt, host, fakeTTY); 5543113Sgblack@eecs.umich.edu tgt.copyOut(mem); 5553113Sgblack@eecs.umich.edu} 5563113Sgblack@eecs.umich.edu 55711759Sbrandon.potter@amd.comtemplate <class OS> 55812032Sandreas.sandberg@arm.comvoid 55911759Sbrandon.potter@amd.comcopyOutStatfsBuf(SETranslatingPortProxy &mem, Addr addr, 56011759Sbrandon.potter@amd.com hst_statfs *host) 56111759Sbrandon.potter@amd.com{ 56211759Sbrandon.potter@amd.com TypedBufferArg<typename OS::tgt_statfs> tgt(addr); 56311759Sbrandon.potter@amd.com 56411812Sbaz21@cam.ac.uk tgt->f_type = TheISA::htog(host->f_type); 56511812Sbaz21@cam.ac.uk#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) 56611812Sbaz21@cam.ac.uk tgt->f_bsize = TheISA::htog(host->f_iosize); 56711759Sbrandon.potter@amd.com#else 56811812Sbaz21@cam.ac.uk tgt->f_bsize = TheISA::htog(host->f_bsize); 56911759Sbrandon.potter@amd.com#endif 57011759Sbrandon.potter@amd.com tgt->f_blocks = TheISA::htog(host->f_blocks); 57111759Sbrandon.potter@amd.com tgt->f_bfree = TheISA::htog(host->f_bfree); 57211759Sbrandon.potter@amd.com tgt->f_bavail = TheISA::htog(host->f_bavail); 57311759Sbrandon.potter@amd.com tgt->f_files = TheISA::htog(host->f_files); 57411759Sbrandon.potter@amd.com tgt->f_ffree = TheISA::htog(host->f_ffree); 57511759Sbrandon.potter@amd.com memcpy(&tgt->f_fsid, &host->f_fsid, sizeof(host->f_fsid)); 57611812Sbaz21@cam.ac.uk#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) 57711812Sbaz21@cam.ac.uk tgt->f_namelen = TheISA::htog(host->f_namemax); 57811812Sbaz21@cam.ac.uk tgt->f_frsize = TheISA::htog(host->f_bsize); 57911812Sbaz21@cam.ac.uk#elif defined(__APPLE__) 58011812Sbaz21@cam.ac.uk tgt->f_namelen = 0; 58111812Sbaz21@cam.ac.uk tgt->f_frsize = 0; 58211812Sbaz21@cam.ac.uk#else 58311759Sbrandon.potter@amd.com tgt->f_namelen = TheISA::htog(host->f_namelen); 58411759Sbrandon.potter@amd.com tgt->f_frsize = TheISA::htog(host->f_frsize); 58511812Sbaz21@cam.ac.uk#endif 58611812Sbaz21@cam.ac.uk#if defined(__linux__) 58711759Sbrandon.potter@amd.com memcpy(&tgt->f_spare, &host->f_spare, sizeof(host->f_spare)); 58811812Sbaz21@cam.ac.uk#else 58911812Sbaz21@cam.ac.uk /* 59011812Sbaz21@cam.ac.uk * The fields are different sizes per OS. Don't bother with 59111812Sbaz21@cam.ac.uk * f_spare or f_reserved on non-Linux for now. 59211812Sbaz21@cam.ac.uk */ 59311812Sbaz21@cam.ac.uk memset(&tgt->f_spare, 0, sizeof(tgt->f_spare)); 59411812Sbaz21@cam.ac.uk#endif 59511759Sbrandon.potter@amd.com 59611759Sbrandon.potter@amd.com tgt.copyOut(mem); 59711759Sbrandon.potter@amd.com} 59811759Sbrandon.potter@amd.com 599378SN/A/// Target ioctl() handler. For the most part, programs call ioctl() 600378SN/A/// only to find out if their stdout is a tty, to determine whether to 6019141Smarc.orr@gmail.com/// do line or block buffering. We always claim that output fds are 6029141Smarc.orr@gmail.com/// not TTYs to provide repeatable results. 603360SN/Atemplate <class OS> 6041450SN/ASyscallReturn 60511856Sbrandon.potter@amd.comioctlFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 606360SN/A{ 6076701Sgblack@eecs.umich.edu int index = 0; 60811856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 60911856Sbrandon.potter@amd.com unsigned req = p->getSyscallArg(tc, index); 610360SN/A 61110930Sbrandon.potter@amd.com DPRINTF(SyscallVerbose, "ioctl(%d, 0x%x, ...)\n", tgt_fd, req); 612360SN/A 61311856Sbrandon.potter@amd.com if (OS::isTtyReq(req)) 61411856Sbrandon.potter@amd.com return -ENOTTY; 61510496Ssteve.reinhardt@amd.com 61611856Sbrandon.potter@amd.com auto dfdp = std::dynamic_pointer_cast<DeviceFDEntry>((*p->fds)[tgt_fd]); 61711856Sbrandon.potter@amd.com if (!dfdp) 6181458SN/A return -EBADF; 619360SN/A 62011856Sbrandon.potter@amd.com /** 62111856Sbrandon.potter@amd.com * If the driver is valid, issue the ioctl through it. Otherwise, 62211856Sbrandon.potter@amd.com * there's an implicit assumption that the device is a TTY type and we 62311856Sbrandon.potter@amd.com * return that we do not have a valid TTY. 62411856Sbrandon.potter@amd.com */ 62511856Sbrandon.potter@amd.com EmulatedDriver *emul_driver = dfdp->getDriver(); 62611856Sbrandon.potter@amd.com if (emul_driver) 62711856Sbrandon.potter@amd.com return emul_driver->ioctl(p, tc, req); 62810496Ssteve.reinhardt@amd.com 62911856Sbrandon.potter@amd.com /** 63011856Sbrandon.potter@amd.com * For lack of a better return code, return ENOTTY. Ideally, we should 63111856Sbrandon.potter@amd.com * return something better here, but at least we issue the warning. 63211856Sbrandon.potter@amd.com */ 63311856Sbrandon.potter@amd.com warn("Unsupported ioctl call (return ENOTTY): ioctl(%d, 0x%x, ...) @ \n", 63410930Sbrandon.potter@amd.com tgt_fd, req, tc->pcState()); 6359141Smarc.orr@gmail.com return -ENOTTY; 636360SN/A} 637360SN/A 638360SN/Atemplate <class OS> 63911907SBrandon.Potter@amd.comSyscallReturn 64011907SBrandon.Potter@amd.comopenImpl(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc, 64111907SBrandon.Potter@amd.com bool isopenat) 642360SN/A{ 64311907SBrandon.Potter@amd.com int index = 0; 64411907SBrandon.Potter@amd.com int tgt_dirfd = -1; 64511907SBrandon.Potter@amd.com 64611907SBrandon.Potter@amd.com /** 64711907SBrandon.Potter@amd.com * If using the openat variant, read in the target directory file 64811907SBrandon.Potter@amd.com * descriptor from the simulated process. 64911907SBrandon.Potter@amd.com */ 65011907SBrandon.Potter@amd.com if (isopenat) 65111907SBrandon.Potter@amd.com tgt_dirfd = p->getSyscallArg(tc, index); 65211907SBrandon.Potter@amd.com 65311907SBrandon.Potter@amd.com /** 65411907SBrandon.Potter@amd.com * Retrieve the simulated process' memory proxy and then read in the path 65511907SBrandon.Potter@amd.com * string from that memory space into the host's working memory space. 65611907SBrandon.Potter@amd.com */ 657360SN/A std::string path; 65811907SBrandon.Potter@amd.com if (!tc->getMemProxy().tryReadString(path, p->getSyscallArg(tc, index))) 6591458SN/A return -EFAULT; 660360SN/A 66111907SBrandon.Potter@amd.com#ifdef __CYGWIN32__ 66211907SBrandon.Potter@amd.com int host_flags = O_BINARY; 66311907SBrandon.Potter@amd.com#else 66411907SBrandon.Potter@amd.com int host_flags = 0; 66511907SBrandon.Potter@amd.com#endif 66611907SBrandon.Potter@amd.com /** 66711907SBrandon.Potter@amd.com * Translate target flags into host flags. Flags exist which are not 66811907SBrandon.Potter@amd.com * ported between architectures which can cause check failures. 66911907SBrandon.Potter@amd.com */ 67011907SBrandon.Potter@amd.com int tgt_flags = p->getSyscallArg(tc, index); 671360SN/A for (int i = 0; i < OS::NUM_OPEN_FLAGS; i++) { 67211907SBrandon.Potter@amd.com if (tgt_flags & OS::openFlagTable[i].tgtFlag) { 67311907SBrandon.Potter@amd.com tgt_flags &= ~OS::openFlagTable[i].tgtFlag; 67411907SBrandon.Potter@amd.com host_flags |= OS::openFlagTable[i].hostFlag; 675360SN/A } 676360SN/A } 67711907SBrandon.Potter@amd.com if (tgt_flags) { 67811907SBrandon.Potter@amd.com warn("open%s: cannot decode flags 0x%x", 67911907SBrandon.Potter@amd.com isopenat ? "at" : "", tgt_flags); 68011907SBrandon.Potter@amd.com } 681360SN/A#ifdef __CYGWIN32__ 68211907SBrandon.Potter@amd.com host_flags |= O_BINARY; 683360SN/A#endif 684360SN/A 68511907SBrandon.Potter@amd.com int mode = p->getSyscallArg(tc, index); 6863669Sbinkertn@umich.edu 68711907SBrandon.Potter@amd.com /** 68811907SBrandon.Potter@amd.com * If the simulated process called open or openat with AT_FDCWD specified, 68911907SBrandon.Potter@amd.com * take the current working directory value which was passed into the 69011907SBrandon.Potter@amd.com * process class as a Python parameter and append the current path to 69111907SBrandon.Potter@amd.com * create a full path. 69211907SBrandon.Potter@amd.com * Otherwise, openat with a valid target directory file descriptor has 69311907SBrandon.Potter@amd.com * been called. If the path option, which was passed in as a parameter, 69411907SBrandon.Potter@amd.com * is not absolute, retrieve the directory file descriptor's path and 69511907SBrandon.Potter@amd.com * prepend it to the path passed in as a parameter. 69611907SBrandon.Potter@amd.com * In every case, we should have a full path (which is relevant to the 69711907SBrandon.Potter@amd.com * host) to work with after this block has been passed. 69811907SBrandon.Potter@amd.com */ 69911907SBrandon.Potter@amd.com if (!isopenat || (isopenat && tgt_dirfd == OS::TGT_AT_FDCWD)) { 70011907SBrandon.Potter@amd.com path = p->fullPath(path); 70111907SBrandon.Potter@amd.com } else if (!startswith(path, "/")) { 70211907SBrandon.Potter@amd.com std::shared_ptr<FDEntry> fdep = ((*p->fds)[tgt_dirfd]); 70311907SBrandon.Potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(fdep); 70411907SBrandon.Potter@amd.com if (!ffdp) 70511907SBrandon.Potter@amd.com return -EBADF; 70613371Sciro.santilli@arm.com path.insert(0, ffdp->getFileName() + "/"); 70711907SBrandon.Potter@amd.com } 7081706SN/A 70911907SBrandon.Potter@amd.com /** 71011907SBrandon.Potter@amd.com * Since this is an emulated environment, we create pseudo file 71111907SBrandon.Potter@amd.com * descriptors for device requests that have been registered with 71211907SBrandon.Potter@amd.com * the process class through Python; this allows us to create a file 71311907SBrandon.Potter@amd.com * descriptor for subsequent ioctl or mmap calls. 71411907SBrandon.Potter@amd.com */ 71510496Ssteve.reinhardt@amd.com if (startswith(path, "/dev/")) { 71610496Ssteve.reinhardt@amd.com std::string filename = path.substr(strlen("/dev/")); 71711907SBrandon.Potter@amd.com EmulatedDriver *drv = p->findDriver(filename); 71811907SBrandon.Potter@amd.com if (drv) { 71911907SBrandon.Potter@amd.com DPRINTF_SYSCALL(Verbose, "open%s: passing call to " 72011907SBrandon.Potter@amd.com "driver open with path[%s]\n", 72111907SBrandon.Potter@amd.com isopenat ? "at" : "", path.c_str()); 72211907SBrandon.Potter@amd.com return drv->open(p, tc, mode, host_flags); 72310496Ssteve.reinhardt@amd.com } 72411907SBrandon.Potter@amd.com /** 72511907SBrandon.Potter@amd.com * Fall through here for pass through to host devices, such 72611907SBrandon.Potter@amd.com * as /dev/zero 72711907SBrandon.Potter@amd.com */ 72810496Ssteve.reinhardt@amd.com } 72910496Ssteve.reinhardt@amd.com 73011907SBrandon.Potter@amd.com /** 73111907SBrandon.Potter@amd.com * Some special paths and files cannot be called on the host and need 73211907SBrandon.Potter@amd.com * to be handled as special cases inside the simulator. 73311907SBrandon.Potter@amd.com * If the full path that was created above does not match any of the 73411907SBrandon.Potter@amd.com * special cases, pass it through to the open call on the host to let 73511907SBrandon.Potter@amd.com * the host open the file on our behalf. 73611907SBrandon.Potter@amd.com * If the host cannot open the file, return the host's error code back 73711907SBrandon.Potter@amd.com * through the system call to the simulated process. 73811907SBrandon.Potter@amd.com */ 73911907SBrandon.Potter@amd.com int sim_fd = -1; 74011907SBrandon.Potter@amd.com std::vector<std::string> special_paths = 74111907SBrandon.Potter@amd.com { "/proc/", "/system/", "/sys/", "/platform/", "/etc/passwd" }; 74211907SBrandon.Potter@amd.com for (auto entry : special_paths) { 74311907SBrandon.Potter@amd.com if (startswith(path, entry)) 74411907SBrandon.Potter@amd.com sim_fd = OS::openSpecialFile(path, p, tc); 74511907SBrandon.Potter@amd.com } 74611907SBrandon.Potter@amd.com if (sim_fd == -1) { 74711907SBrandon.Potter@amd.com sim_fd = open(path.c_str(), host_flags, mode); 74811907SBrandon.Potter@amd.com } 74911907SBrandon.Potter@amd.com if (sim_fd == -1) { 75011907SBrandon.Potter@amd.com int local = -errno; 75111907SBrandon.Potter@amd.com DPRINTF_SYSCALL(Verbose, "open%s: failed -> path:%s\n", 75211907SBrandon.Potter@amd.com isopenat ? "at" : "", path.c_str()); 75311907SBrandon.Potter@amd.com return local; 75411907SBrandon.Potter@amd.com } 755360SN/A 75611907SBrandon.Potter@amd.com /** 75711907SBrandon.Potter@amd.com * The file was opened successfully and needs to be recorded in the 75811907SBrandon.Potter@amd.com * process' file descriptor array so that it can be retrieved later. 75911907SBrandon.Potter@amd.com * The target file descriptor that is chosen will be the lowest unused 76011907SBrandon.Potter@amd.com * file descriptor. 76111907SBrandon.Potter@amd.com * Return the indirect target file descriptor back to the simulated 76211907SBrandon.Potter@amd.com * process to act as a handle for the opened file. 76311907SBrandon.Potter@amd.com */ 76411907SBrandon.Potter@amd.com auto ffdp = std::make_shared<FileFDEntry>(sim_fd, host_flags, path, 0); 76511907SBrandon.Potter@amd.com int tgt_fd = p->fds->allocFD(ffdp); 76611907SBrandon.Potter@amd.com DPRINTF_SYSCALL(Verbose, "open%s: sim_fd[%d], target_fd[%d] -> path:%s\n", 76711907SBrandon.Potter@amd.com isopenat ? "at" : "", sim_fd, tgt_fd, path.c_str()); 76811907SBrandon.Potter@amd.com return tgt_fd; 769360SN/A} 770360SN/A 77110027SChris.Adeniyi-Jones@arm.com/// Target open() handler. 77210027SChris.Adeniyi-Jones@arm.comtemplate <class OS> 77310027SChris.Adeniyi-Jones@arm.comSyscallReturn 77411851Sbrandon.potter@amd.comopenFunc(SyscallDesc *desc, int callnum, Process *process, 77510027SChris.Adeniyi-Jones@arm.com ThreadContext *tc) 77610027SChris.Adeniyi-Jones@arm.com{ 77711907SBrandon.Potter@amd.com return openImpl<OS>(desc, callnum, process, tc, false); 77810027SChris.Adeniyi-Jones@arm.com} 77910027SChris.Adeniyi-Jones@arm.com 78010027SChris.Adeniyi-Jones@arm.com/// Target openat() handler. 78110027SChris.Adeniyi-Jones@arm.comtemplate <class OS> 78210027SChris.Adeniyi-Jones@arm.comSyscallReturn 78311851Sbrandon.potter@amd.comopenatFunc(SyscallDesc *desc, int callnum, Process *process, 78411851Sbrandon.potter@amd.com ThreadContext *tc) 78510027SChris.Adeniyi-Jones@arm.com{ 78611907SBrandon.Potter@amd.com return openImpl<OS>(desc, callnum, process, tc, true); 78710027SChris.Adeniyi-Jones@arm.com} 78810027SChris.Adeniyi-Jones@arm.com 78910633Smichaelupton@gmail.com/// Target unlinkat() handler. 79010633Smichaelupton@gmail.comtemplate <class OS> 79110633Smichaelupton@gmail.comSyscallReturn 79211851Sbrandon.potter@amd.comunlinkatFunc(SyscallDesc *desc, int callnum, Process *process, 79310633Smichaelupton@gmail.com ThreadContext *tc) 79410633Smichaelupton@gmail.com{ 79510633Smichaelupton@gmail.com int index = 0; 79610633Smichaelupton@gmail.com int dirfd = process->getSyscallArg(tc, index); 79710633Smichaelupton@gmail.com if (dirfd != OS::TGT_AT_FDCWD) 79810633Smichaelupton@gmail.com warn("unlinkat: first argument not AT_FDCWD; unlikely to work"); 79910633Smichaelupton@gmail.com 80010633Smichaelupton@gmail.com return unlinkHelper(desc, callnum, process, tc, 1); 80110633Smichaelupton@gmail.com} 80210633Smichaelupton@gmail.com 80310203SAli.Saidi@ARM.com/// Target facessat() handler 80410203SAli.Saidi@ARM.comtemplate <class OS> 80510203SAli.Saidi@ARM.comSyscallReturn 80611851Sbrandon.potter@amd.comfaccessatFunc(SyscallDesc *desc, int callnum, Process *process, 80711851Sbrandon.potter@amd.com ThreadContext *tc) 80810203SAli.Saidi@ARM.com{ 80910203SAli.Saidi@ARM.com int index = 0; 81010203SAli.Saidi@ARM.com int dirfd = process->getSyscallArg(tc, index); 81110203SAli.Saidi@ARM.com if (dirfd != OS::TGT_AT_FDCWD) 81210203SAli.Saidi@ARM.com warn("faccessat: first argument not AT_FDCWD; unlikely to work"); 81310203SAli.Saidi@ARM.com return accessFunc(desc, callnum, process, tc, 1); 81410203SAli.Saidi@ARM.com} 81510203SAli.Saidi@ARM.com 81610203SAli.Saidi@ARM.com/// Target readlinkat() handler 81710203SAli.Saidi@ARM.comtemplate <class OS> 81810203SAli.Saidi@ARM.comSyscallReturn 81911851Sbrandon.potter@amd.comreadlinkatFunc(SyscallDesc *desc, int callnum, Process *process, 82011851Sbrandon.potter@amd.com ThreadContext *tc) 82110203SAli.Saidi@ARM.com{ 82210203SAli.Saidi@ARM.com int index = 0; 82310203SAli.Saidi@ARM.com int dirfd = process->getSyscallArg(tc, index); 82410203SAli.Saidi@ARM.com if (dirfd != OS::TGT_AT_FDCWD) 82510203SAli.Saidi@ARM.com warn("openat: first argument not AT_FDCWD; unlikely to work"); 82610203SAli.Saidi@ARM.com return readlinkFunc(desc, callnum, process, tc, 1); 82710203SAli.Saidi@ARM.com} 82810203SAli.Saidi@ARM.com 82910850SGiacomo.Gabrielli@arm.com/// Target renameat() handler. 83010850SGiacomo.Gabrielli@arm.comtemplate <class OS> 83110850SGiacomo.Gabrielli@arm.comSyscallReturn 83211851Sbrandon.potter@amd.comrenameatFunc(SyscallDesc *desc, int callnum, Process *process, 83310850SGiacomo.Gabrielli@arm.com ThreadContext *tc) 83410850SGiacomo.Gabrielli@arm.com{ 83510850SGiacomo.Gabrielli@arm.com int index = 0; 83610850SGiacomo.Gabrielli@arm.com 83710850SGiacomo.Gabrielli@arm.com int olddirfd = process->getSyscallArg(tc, index); 83810850SGiacomo.Gabrielli@arm.com if (olddirfd != OS::TGT_AT_FDCWD) 83910850SGiacomo.Gabrielli@arm.com warn("renameat: first argument not AT_FDCWD; unlikely to work"); 84010850SGiacomo.Gabrielli@arm.com 84110850SGiacomo.Gabrielli@arm.com std::string old_name; 84210850SGiacomo.Gabrielli@arm.com 84310850SGiacomo.Gabrielli@arm.com if (!tc->getMemProxy().tryReadString(old_name, 84410850SGiacomo.Gabrielli@arm.com process->getSyscallArg(tc, index))) 84510850SGiacomo.Gabrielli@arm.com return -EFAULT; 84610850SGiacomo.Gabrielli@arm.com 84710850SGiacomo.Gabrielli@arm.com int newdirfd = process->getSyscallArg(tc, index); 84810850SGiacomo.Gabrielli@arm.com if (newdirfd != OS::TGT_AT_FDCWD) 84910850SGiacomo.Gabrielli@arm.com warn("renameat: third argument not AT_FDCWD; unlikely to work"); 85010850SGiacomo.Gabrielli@arm.com 85110850SGiacomo.Gabrielli@arm.com std::string new_name; 85210850SGiacomo.Gabrielli@arm.com 85310850SGiacomo.Gabrielli@arm.com if (!tc->getMemProxy().tryReadString(new_name, 85410850SGiacomo.Gabrielli@arm.com process->getSyscallArg(tc, index))) 85510850SGiacomo.Gabrielli@arm.com return -EFAULT; 85610850SGiacomo.Gabrielli@arm.com 85710850SGiacomo.Gabrielli@arm.com // Adjust path for current working directory 85810850SGiacomo.Gabrielli@arm.com old_name = process->fullPath(old_name); 85910850SGiacomo.Gabrielli@arm.com new_name = process->fullPath(new_name); 86010850SGiacomo.Gabrielli@arm.com 86110850SGiacomo.Gabrielli@arm.com int result = rename(old_name.c_str(), new_name.c_str()); 86210850SGiacomo.Gabrielli@arm.com return (result == -1) ? -errno : result; 86310850SGiacomo.Gabrielli@arm.com} 86410850SGiacomo.Gabrielli@arm.com 8656640Svince@csl.cornell.edu/// Target sysinfo() handler. 8666640Svince@csl.cornell.edutemplate <class OS> 8676640Svince@csl.cornell.eduSyscallReturn 86811851Sbrandon.potter@amd.comsysinfoFunc(SyscallDesc *desc, int callnum, Process *process, 86911851Sbrandon.potter@amd.com ThreadContext *tc) 8706640Svince@csl.cornell.edu{ 8716640Svince@csl.cornell.edu 8726701Sgblack@eecs.umich.edu int index = 0; 8736701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::tgt_sysinfo> 87410793Sbrandon.potter@amd.com sysinfo(process->getSyscallArg(tc, index)); 8756640Svince@csl.cornell.edu 87611758Sbrandon.potter@amd.com sysinfo->uptime = seconds_since_epoch; 87711758Sbrandon.potter@amd.com sysinfo->totalram = process->system->memSize(); 87811758Sbrandon.potter@amd.com sysinfo->mem_unit = 1; 8796640Svince@csl.cornell.edu 8808706Sandreas.hansson@arm.com sysinfo.copyOut(tc->getMemProxy()); 8816640Svince@csl.cornell.edu 8826701Sgblack@eecs.umich.edu return 0; 8836640Svince@csl.cornell.edu} 884360SN/A 8851999SN/A/// Target chmod() handler. 8861999SN/Atemplate <class OS> 8871999SN/ASyscallReturn 88811851Sbrandon.potter@amd.comchmodFunc(SyscallDesc *desc, int callnum, Process *process, 8892680Sktlim@umich.edu ThreadContext *tc) 8901999SN/A{ 8911999SN/A std::string path; 8921999SN/A 8936701Sgblack@eecs.umich.edu int index = 0; 8948852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 8956701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 8961999SN/A return -EFAULT; 8976701Sgblack@eecs.umich.edu } 8981999SN/A 8996701Sgblack@eecs.umich.edu uint32_t mode = process->getSyscallArg(tc, index); 9001999SN/A mode_t hostMode = 0; 9011999SN/A 9021999SN/A // XXX translate mode flags via OS::something??? 9031999SN/A hostMode = mode; 9041999SN/A 9053669Sbinkertn@umich.edu // Adjust path for current working directory 9063669Sbinkertn@umich.edu path = process->fullPath(path); 9073669Sbinkertn@umich.edu 9081999SN/A // do the chmod 9091999SN/A int result = chmod(path.c_str(), hostMode); 9101999SN/A if (result < 0) 9112218SN/A return -errno; 9121999SN/A 9131999SN/A return 0; 9141999SN/A} 9151999SN/A 9161999SN/A 9171999SN/A/// Target fchmod() handler. 9181999SN/Atemplate <class OS> 9191999SN/ASyscallReturn 92011856Sbrandon.potter@amd.comfchmodFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 9211999SN/A{ 9226701Sgblack@eecs.umich.edu int index = 0; 92311856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 92411856Sbrandon.potter@amd.com uint32_t mode = p->getSyscallArg(tc, index); 92510931Sbrandon.potter@amd.com 92611856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 92711856Sbrandon.potter@amd.com if (!ffdp) 9281999SN/A return -EBADF; 92911856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 9301999SN/A 93111856Sbrandon.potter@amd.com mode_t hostMode = mode; 9321999SN/A 93311856Sbrandon.potter@amd.com int result = fchmod(sim_fd, hostMode); 9341999SN/A 93511856Sbrandon.potter@amd.com return (result < 0) ? -errno : 0; 9361999SN/A} 9371999SN/A 9385877Shsul@eecs.umich.edu/// Target mremap() handler. 9395877Shsul@eecs.umich.edutemplate <class OS> 9405877Shsul@eecs.umich.eduSyscallReturn 94111851Sbrandon.potter@amd.commremapFunc(SyscallDesc *desc, int callnum, Process *process, ThreadContext *tc) 9425877Shsul@eecs.umich.edu{ 9436701Sgblack@eecs.umich.edu int index = 0; 9446701Sgblack@eecs.umich.edu Addr start = process->getSyscallArg(tc, index); 9456701Sgblack@eecs.umich.edu uint64_t old_length = process->getSyscallArg(tc, index); 9466701Sgblack@eecs.umich.edu uint64_t new_length = process->getSyscallArg(tc, index); 9476701Sgblack@eecs.umich.edu uint64_t flags = process->getSyscallArg(tc, index); 94810027SChris.Adeniyi-Jones@arm.com uint64_t provided_address = 0; 94910027SChris.Adeniyi-Jones@arm.com bool use_provided_address = flags & OS::TGT_MREMAP_FIXED; 95010027SChris.Adeniyi-Jones@arm.com 95110027SChris.Adeniyi-Jones@arm.com if (use_provided_address) 95210027SChris.Adeniyi-Jones@arm.com provided_address = process->getSyscallArg(tc, index); 9535877Shsul@eecs.umich.edu 95410318Sandreas.hansson@arm.com if ((start % TheISA::PageBytes != 0) || 95510318Sandreas.hansson@arm.com (provided_address % TheISA::PageBytes != 0)) { 9565877Shsul@eecs.umich.edu warn("mremap failing: arguments not page aligned"); 9575877Shsul@eecs.umich.edu return -EINVAL; 9585877Shsul@eecs.umich.edu } 9595877Shsul@eecs.umich.edu 96010486Stjablin@gmail.com new_length = roundUp(new_length, TheISA::PageBytes); 96110486Stjablin@gmail.com 9625877Shsul@eecs.umich.edu if (new_length > old_length) { 96311905SBrandon.Potter@amd.com std::shared_ptr<MemState> mem_state = process->memState; 96411905SBrandon.Potter@amd.com Addr mmap_end = mem_state->getMmapEnd(); 96511905SBrandon.Potter@amd.com 96611905SBrandon.Potter@amd.com if ((start + old_length) == mmap_end && 96710027SChris.Adeniyi-Jones@arm.com (!use_provided_address || provided_address == start)) { 96812206Srico.amslinger@informatik.uni-augsburg.de // This case cannot occur when growing downward, as 96912206Srico.amslinger@informatik.uni-augsburg.de // start is greater than or equal to mmap_end. 9705877Shsul@eecs.umich.edu uint64_t diff = new_length - old_length; 97111905SBrandon.Potter@amd.com process->allocateMem(mmap_end, diff); 97211905SBrandon.Potter@amd.com mem_state->setMmapEnd(mmap_end + diff); 9735877Shsul@eecs.umich.edu return start; 9745877Shsul@eecs.umich.edu } else { 97510027SChris.Adeniyi-Jones@arm.com if (!use_provided_address && !(flags & OS::TGT_MREMAP_MAYMOVE)) { 9765877Shsul@eecs.umich.edu warn("can't remap here and MREMAP_MAYMOVE flag not set\n"); 9775877Shsul@eecs.umich.edu return -ENOMEM; 9785877Shsul@eecs.umich.edu } else { 97912206Srico.amslinger@informatik.uni-augsburg.de uint64_t new_start = provided_address; 98012206Srico.amslinger@informatik.uni-augsburg.de if (!use_provided_address) { 98112206Srico.amslinger@informatik.uni-augsburg.de new_start = process->mmapGrowsDown() ? 98212206Srico.amslinger@informatik.uni-augsburg.de mmap_end - new_length : mmap_end; 98312206Srico.amslinger@informatik.uni-augsburg.de mmap_end = process->mmapGrowsDown() ? 98412206Srico.amslinger@informatik.uni-augsburg.de new_start : mmap_end + new_length; 98512206Srico.amslinger@informatik.uni-augsburg.de mem_state->setMmapEnd(mmap_end); 98612206Srico.amslinger@informatik.uni-augsburg.de } 98712206Srico.amslinger@informatik.uni-augsburg.de 98810027SChris.Adeniyi-Jones@arm.com process->pTable->remap(start, old_length, new_start); 98910027SChris.Adeniyi-Jones@arm.com warn("mremapping to new vaddr %08p-%08p, adding %d\n", 99010027SChris.Adeniyi-Jones@arm.com new_start, new_start + new_length, 99110027SChris.Adeniyi-Jones@arm.com new_length - old_length); 9925877Shsul@eecs.umich.edu // add on the remaining unallocated pages 99310027SChris.Adeniyi-Jones@arm.com process->allocateMem(new_start + old_length, 99410027SChris.Adeniyi-Jones@arm.com new_length - old_length, 99510027SChris.Adeniyi-Jones@arm.com use_provided_address /* clobber */); 99610027SChris.Adeniyi-Jones@arm.com if (use_provided_address && 99712206Srico.amslinger@informatik.uni-augsburg.de ((new_start + new_length > mem_state->getMmapEnd() && 99812206Srico.amslinger@informatik.uni-augsburg.de !process->mmapGrowsDown()) || 99912206Srico.amslinger@informatik.uni-augsburg.de (new_start < mem_state->getMmapEnd() && 100012206Srico.amslinger@informatik.uni-augsburg.de process->mmapGrowsDown()))) { 100110027SChris.Adeniyi-Jones@arm.com // something fishy going on here, at least notify the user 100210027SChris.Adeniyi-Jones@arm.com // @todo: increase mmap_end? 100310027SChris.Adeniyi-Jones@arm.com warn("mmap region limit exceeded with MREMAP_FIXED\n"); 100410027SChris.Adeniyi-Jones@arm.com } 100510027SChris.Adeniyi-Jones@arm.com warn("returning %08p as start\n", new_start); 100610027SChris.Adeniyi-Jones@arm.com return new_start; 10075877Shsul@eecs.umich.edu } 10085877Shsul@eecs.umich.edu } 10095877Shsul@eecs.umich.edu } else { 101010027SChris.Adeniyi-Jones@arm.com if (use_provided_address && provided_address != start) 101110027SChris.Adeniyi-Jones@arm.com process->pTable->remap(start, new_length, provided_address); 10128601Ssteve.reinhardt@amd.com process->pTable->unmap(start + new_length, old_length - new_length); 101310027SChris.Adeniyi-Jones@arm.com return use_provided_address ? provided_address : start; 10145877Shsul@eecs.umich.edu } 10155877Shsul@eecs.umich.edu} 10161999SN/A 1017378SN/A/// Target stat() handler. 1018360SN/Atemplate <class OS> 10191450SN/ASyscallReturn 102011851Sbrandon.potter@amd.comstatFunc(SyscallDesc *desc, int callnum, Process *process, 10212680Sktlim@umich.edu ThreadContext *tc) 1022360SN/A{ 1023360SN/A std::string path; 1024360SN/A 10256701Sgblack@eecs.umich.edu int index = 0; 10268852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 10276701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 10286701Sgblack@eecs.umich.edu return -EFAULT; 10296701Sgblack@eecs.umich.edu } 10306701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 1031360SN/A 10323669Sbinkertn@umich.edu // Adjust path for current working directory 10333669Sbinkertn@umich.edu path = process->fullPath(path); 10343669Sbinkertn@umich.edu 1035360SN/A struct stat hostBuf; 1036360SN/A int result = stat(path.c_str(), &hostBuf); 1037360SN/A 1038360SN/A if (result < 0) 10392218SN/A return -errno; 1040360SN/A 10418706Sandreas.hansson@arm.com copyOutStatBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 1042360SN/A 10431458SN/A return 0; 1044360SN/A} 1045360SN/A 1046360SN/A 10475074Ssaidi@eecs.umich.edu/// Target stat64() handler. 10485074Ssaidi@eecs.umich.edutemplate <class OS> 10495074Ssaidi@eecs.umich.eduSyscallReturn 105011851Sbrandon.potter@amd.comstat64Func(SyscallDesc *desc, int callnum, Process *process, 10515074Ssaidi@eecs.umich.edu ThreadContext *tc) 10525074Ssaidi@eecs.umich.edu{ 10535074Ssaidi@eecs.umich.edu std::string path; 10545074Ssaidi@eecs.umich.edu 10556701Sgblack@eecs.umich.edu int index = 0; 10568852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 10576701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) 10585074Ssaidi@eecs.umich.edu return -EFAULT; 10596701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 10605074Ssaidi@eecs.umich.edu 10615074Ssaidi@eecs.umich.edu // Adjust path for current working directory 10625074Ssaidi@eecs.umich.edu path = process->fullPath(path); 10635074Ssaidi@eecs.umich.edu 10645208Ssaidi@eecs.umich.edu#if NO_STAT64 10655208Ssaidi@eecs.umich.edu struct stat hostBuf; 10665208Ssaidi@eecs.umich.edu int result = stat(path.c_str(), &hostBuf); 10675208Ssaidi@eecs.umich.edu#else 10685074Ssaidi@eecs.umich.edu struct stat64 hostBuf; 10695074Ssaidi@eecs.umich.edu int result = stat64(path.c_str(), &hostBuf); 10705208Ssaidi@eecs.umich.edu#endif 10715074Ssaidi@eecs.umich.edu 10725074Ssaidi@eecs.umich.edu if (result < 0) 10735074Ssaidi@eecs.umich.edu return -errno; 10745074Ssaidi@eecs.umich.edu 10758706Sandreas.hansson@arm.com copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 10765074Ssaidi@eecs.umich.edu 10775074Ssaidi@eecs.umich.edu return 0; 10785074Ssaidi@eecs.umich.edu} 10795074Ssaidi@eecs.umich.edu 10805074Ssaidi@eecs.umich.edu 108110027SChris.Adeniyi-Jones@arm.com/// Target fstatat64() handler. 108210027SChris.Adeniyi-Jones@arm.comtemplate <class OS> 108310027SChris.Adeniyi-Jones@arm.comSyscallReturn 108411851Sbrandon.potter@amd.comfstatat64Func(SyscallDesc *desc, int callnum, Process *process, 108510027SChris.Adeniyi-Jones@arm.com ThreadContext *tc) 108610027SChris.Adeniyi-Jones@arm.com{ 108710027SChris.Adeniyi-Jones@arm.com int index = 0; 108810027SChris.Adeniyi-Jones@arm.com int dirfd = process->getSyscallArg(tc, index); 108910027SChris.Adeniyi-Jones@arm.com if (dirfd != OS::TGT_AT_FDCWD) 109010793Sbrandon.potter@amd.com warn("fstatat64: first argument not AT_FDCWD; unlikely to work"); 109110027SChris.Adeniyi-Jones@arm.com 109210027SChris.Adeniyi-Jones@arm.com std::string path; 109310027SChris.Adeniyi-Jones@arm.com if (!tc->getMemProxy().tryReadString(path, 109410027SChris.Adeniyi-Jones@arm.com process->getSyscallArg(tc, index))) 109510027SChris.Adeniyi-Jones@arm.com return -EFAULT; 109610027SChris.Adeniyi-Jones@arm.com Addr bufPtr = process->getSyscallArg(tc, index); 109710027SChris.Adeniyi-Jones@arm.com 109810027SChris.Adeniyi-Jones@arm.com // Adjust path for current working directory 109910027SChris.Adeniyi-Jones@arm.com path = process->fullPath(path); 110010027SChris.Adeniyi-Jones@arm.com 110110027SChris.Adeniyi-Jones@arm.com#if NO_STAT64 110210027SChris.Adeniyi-Jones@arm.com struct stat hostBuf; 110310027SChris.Adeniyi-Jones@arm.com int result = stat(path.c_str(), &hostBuf); 110410027SChris.Adeniyi-Jones@arm.com#else 110510027SChris.Adeniyi-Jones@arm.com struct stat64 hostBuf; 110610027SChris.Adeniyi-Jones@arm.com int result = stat64(path.c_str(), &hostBuf); 110710027SChris.Adeniyi-Jones@arm.com#endif 110810027SChris.Adeniyi-Jones@arm.com 110910027SChris.Adeniyi-Jones@arm.com if (result < 0) 111010027SChris.Adeniyi-Jones@arm.com return -errno; 111110027SChris.Adeniyi-Jones@arm.com 111210027SChris.Adeniyi-Jones@arm.com copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 111310027SChris.Adeniyi-Jones@arm.com 111410027SChris.Adeniyi-Jones@arm.com return 0; 111510027SChris.Adeniyi-Jones@arm.com} 111610027SChris.Adeniyi-Jones@arm.com 111710027SChris.Adeniyi-Jones@arm.com 11181999SN/A/// Target fstat64() handler. 11191999SN/Atemplate <class OS> 11201999SN/ASyscallReturn 112111856Sbrandon.potter@amd.comfstat64Func(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 11221999SN/A{ 11236701Sgblack@eecs.umich.edu int index = 0; 112411856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 112511856Sbrandon.potter@amd.com Addr bufPtr = p->getSyscallArg(tc, index); 112610931Sbrandon.potter@amd.com 112711856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 112811856Sbrandon.potter@amd.com if (!ffdp) 11291999SN/A return -EBADF; 113011856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 11311999SN/A 11322764Sstever@eecs.umich.edu#if NO_STAT64 11332064SN/A struct stat hostBuf; 113410931Sbrandon.potter@amd.com int result = fstat(sim_fd, &hostBuf); 11352064SN/A#else 11362064SN/A struct stat64 hostBuf; 113710931Sbrandon.potter@amd.com int result = fstat64(sim_fd, &hostBuf); 11382064SN/A#endif 11391999SN/A 11401999SN/A if (result < 0) 11412218SN/A return -errno; 11421999SN/A 114310931Sbrandon.potter@amd.com copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf, (sim_fd == 1)); 11441999SN/A 11451999SN/A return 0; 11461999SN/A} 11471999SN/A 11481999SN/A 1149378SN/A/// Target lstat() handler. 1150360SN/Atemplate <class OS> 11511450SN/ASyscallReturn 115211851Sbrandon.potter@amd.comlstatFunc(SyscallDesc *desc, int callnum, Process *process, 11532680Sktlim@umich.edu ThreadContext *tc) 1154360SN/A{ 1155360SN/A std::string path; 1156360SN/A 11576701Sgblack@eecs.umich.edu int index = 0; 11588852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 11596701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 11606701Sgblack@eecs.umich.edu return -EFAULT; 11616701Sgblack@eecs.umich.edu } 11626701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 1163360SN/A 11643669Sbinkertn@umich.edu // Adjust path for current working directory 11653669Sbinkertn@umich.edu path = process->fullPath(path); 11663669Sbinkertn@umich.edu 1167360SN/A struct stat hostBuf; 1168360SN/A int result = lstat(path.c_str(), &hostBuf); 1169360SN/A 1170360SN/A if (result < 0) 11711458SN/A return -errno; 1172360SN/A 11738706Sandreas.hansson@arm.com copyOutStatBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 1174360SN/A 11751458SN/A return 0; 1176360SN/A} 1177360SN/A 11781999SN/A/// Target lstat64() handler. 11791999SN/Atemplate <class OS> 11801999SN/ASyscallReturn 118111851Sbrandon.potter@amd.comlstat64Func(SyscallDesc *desc, int callnum, Process *process, 11822680Sktlim@umich.edu ThreadContext *tc) 11831999SN/A{ 11841999SN/A std::string path; 11851999SN/A 11866701Sgblack@eecs.umich.edu int index = 0; 11878852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 11886701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 11896701Sgblack@eecs.umich.edu return -EFAULT; 11906701Sgblack@eecs.umich.edu } 11916701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 11921999SN/A 11933669Sbinkertn@umich.edu // Adjust path for current working directory 11943669Sbinkertn@umich.edu path = process->fullPath(path); 11953669Sbinkertn@umich.edu 11962764Sstever@eecs.umich.edu#if NO_STAT64 11972064SN/A struct stat hostBuf; 11982064SN/A int result = lstat(path.c_str(), &hostBuf); 11992064SN/A#else 12001999SN/A struct stat64 hostBuf; 12011999SN/A int result = lstat64(path.c_str(), &hostBuf); 12022064SN/A#endif 12031999SN/A 12041999SN/A if (result < 0) 12051999SN/A return -errno; 12061999SN/A 12078706Sandreas.hansson@arm.com copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 12081999SN/A 12091999SN/A return 0; 12101999SN/A} 12111999SN/A 1212378SN/A/// Target fstat() handler. 1213360SN/Atemplate <class OS> 12141450SN/ASyscallReturn 121511856Sbrandon.potter@amd.comfstatFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 1216360SN/A{ 12176701Sgblack@eecs.umich.edu int index = 0; 121811856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 121911856Sbrandon.potter@amd.com Addr bufPtr = p->getSyscallArg(tc, index); 1220360SN/A 122111380Salexandru.dutu@amd.com DPRINTF_SYSCALL(Verbose, "fstat(%d, ...)\n", tgt_fd); 1222360SN/A 122311856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 122411856Sbrandon.potter@amd.com if (!ffdp) 12251458SN/A return -EBADF; 122611856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 1227360SN/A 1228360SN/A struct stat hostBuf; 122910931Sbrandon.potter@amd.com int result = fstat(sim_fd, &hostBuf); 1230360SN/A 1231360SN/A if (result < 0) 12321458SN/A return -errno; 1233360SN/A 123410931Sbrandon.potter@amd.com copyOutStatBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf, (sim_fd == 1)); 12352021SN/A 12361458SN/A return 0; 1237360SN/A} 1238360SN/A 1239360SN/A 12401706SN/A/// Target statfs() handler. 12411706SN/Atemplate <class OS> 12421706SN/ASyscallReturn 124311851Sbrandon.potter@amd.comstatfsFunc(SyscallDesc *desc, int callnum, Process *process, 12442680Sktlim@umich.edu ThreadContext *tc) 12451706SN/A{ 124611799Sbrandon.potter@amd.com#if NO_STATFS 124711799Sbrandon.potter@amd.com warn("Host OS cannot support calls to statfs. Ignoring syscall"); 124811799Sbrandon.potter@amd.com#else 12491706SN/A std::string path; 12501706SN/A 12516701Sgblack@eecs.umich.edu int index = 0; 12528852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 12536701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 12546701Sgblack@eecs.umich.edu return -EFAULT; 12556701Sgblack@eecs.umich.edu } 12566701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 12571706SN/A 12583669Sbinkertn@umich.edu // Adjust path for current working directory 12593669Sbinkertn@umich.edu path = process->fullPath(path); 12603669Sbinkertn@umich.edu 12611706SN/A struct statfs hostBuf; 12621706SN/A int result = statfs(path.c_str(), &hostBuf); 12631706SN/A 12641706SN/A if (result < 0) 12652218SN/A return -errno; 12661706SN/A 126711759Sbrandon.potter@amd.com copyOutStatfsBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 126811799Sbrandon.potter@amd.com#endif 12691706SN/A return 0; 12701706SN/A} 12711706SN/A 127211886Sbrandon.potter@amd.comtemplate <class OS> 127311886Sbrandon.potter@amd.comSyscallReturn 127411886Sbrandon.potter@amd.comcloneFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 127511886Sbrandon.potter@amd.com{ 127611886Sbrandon.potter@amd.com int index = 0; 127712426Sqtt2@cornell.edu 127813557Sgabeblack@google.com RegVal flags = p->getSyscallArg(tc, index); 127913557Sgabeblack@google.com RegVal newStack = p->getSyscallArg(tc, index); 128011886Sbrandon.potter@amd.com Addr ptidPtr = p->getSyscallArg(tc, index); 128112426Sqtt2@cornell.edu 128213534Sandreas.sandberg@arm.com#if THE_ISA == RISCV_ISA or THE_ISA == ARM_ISA 128312426Sqtt2@cornell.edu /** 128413534Sandreas.sandberg@arm.com * Linux sets CLONE_BACKWARDS flag for RISC-V and Arm. 128512426Sqtt2@cornell.edu * The flag defines the list of clone() arguments in the following 128612426Sqtt2@cornell.edu * order: flags -> newStack -> ptidPtr -> tlsPtr -> ctidPtr 128712426Sqtt2@cornell.edu */ 128813536Sandreas.sandberg@arm.com Addr tlsPtr = p->getSyscallArg(tc, index); 128912426Sqtt2@cornell.edu Addr ctidPtr = p->getSyscallArg(tc, index); 129012426Sqtt2@cornell.edu#else 129111886Sbrandon.potter@amd.com Addr ctidPtr = p->getSyscallArg(tc, index); 129213536Sandreas.sandberg@arm.com Addr tlsPtr = p->getSyscallArg(tc, index); 129312426Sqtt2@cornell.edu#endif 129411886Sbrandon.potter@amd.com 129511886Sbrandon.potter@amd.com if (((flags & OS::TGT_CLONE_SIGHAND)&& !(flags & OS::TGT_CLONE_VM)) || 129611886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_THREAD) && !(flags & OS::TGT_CLONE_SIGHAND)) || 129711886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_FS) && (flags & OS::TGT_CLONE_NEWNS)) || 129811886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_NEWIPC) && (flags & OS::TGT_CLONE_SYSVSEM)) || 129911886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_NEWPID) && (flags & OS::TGT_CLONE_THREAD)) || 130011886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_VM) && !(newStack))) 130111886Sbrandon.potter@amd.com return -EINVAL; 130211886Sbrandon.potter@amd.com 130311886Sbrandon.potter@amd.com ThreadContext *ctc; 130411886Sbrandon.potter@amd.com if (!(ctc = p->findFreeContext())) 130511886Sbrandon.potter@amd.com fatal("clone: no spare thread context in system"); 130611886Sbrandon.potter@amd.com 130711886Sbrandon.potter@amd.com /** 130811886Sbrandon.potter@amd.com * Note that ProcessParams is generated by swig and there are no other 130911886Sbrandon.potter@amd.com * examples of how to create anything but this default constructor. The 131011886Sbrandon.potter@amd.com * fields are manually initialized instead of passing parameters to the 131111886Sbrandon.potter@amd.com * constructor. 131211886Sbrandon.potter@amd.com */ 131311886Sbrandon.potter@amd.com ProcessParams *pp = new ProcessParams(); 131411886Sbrandon.potter@amd.com pp->executable.assign(*(new std::string(p->progName()))); 131511886Sbrandon.potter@amd.com pp->cmd.push_back(*(new std::string(p->progName()))); 131611886Sbrandon.potter@amd.com pp->system = p->system; 131711886Sbrandon.potter@amd.com pp->cwd.assign(p->getcwd()); 131811886Sbrandon.potter@amd.com pp->input.assign("stdin"); 131911886Sbrandon.potter@amd.com pp->output.assign("stdout"); 132011886Sbrandon.potter@amd.com pp->errout.assign("stderr"); 132111886Sbrandon.potter@amd.com pp->uid = p->uid(); 132211886Sbrandon.potter@amd.com pp->euid = p->euid(); 132311886Sbrandon.potter@amd.com pp->gid = p->gid(); 132411886Sbrandon.potter@amd.com pp->egid = p->egid(); 132511886Sbrandon.potter@amd.com 132611886Sbrandon.potter@amd.com /* Find the first free PID that's less than the maximum */ 132711886Sbrandon.potter@amd.com std::set<int> const& pids = p->system->PIDs; 132811886Sbrandon.potter@amd.com int temp_pid = *pids.begin(); 132911886Sbrandon.potter@amd.com do { 133011886Sbrandon.potter@amd.com temp_pid++; 133111886Sbrandon.potter@amd.com } while (pids.find(temp_pid) != pids.end()); 133211886Sbrandon.potter@amd.com if (temp_pid >= System::maxPID) 133311886Sbrandon.potter@amd.com fatal("temp_pid is too large: %d", temp_pid); 133411886Sbrandon.potter@amd.com 133511886Sbrandon.potter@amd.com pp->pid = temp_pid; 133611886Sbrandon.potter@amd.com pp->ppid = (flags & OS::TGT_CLONE_THREAD) ? p->ppid() : p->pid(); 133711886Sbrandon.potter@amd.com Process *cp = pp->create(); 133811886Sbrandon.potter@amd.com delete pp; 133911886Sbrandon.potter@amd.com 134011886Sbrandon.potter@amd.com Process *owner = ctc->getProcessPtr(); 134111886Sbrandon.potter@amd.com ctc->setProcessPtr(cp); 134211886Sbrandon.potter@amd.com cp->assignThreadContext(ctc->contextId()); 134311886Sbrandon.potter@amd.com owner->revokeThreadContext(ctc->contextId()); 134411886Sbrandon.potter@amd.com 134511886Sbrandon.potter@amd.com if (flags & OS::TGT_CLONE_PARENT_SETTID) { 134611886Sbrandon.potter@amd.com BufferArg ptidBuf(ptidPtr, sizeof(long)); 134711886Sbrandon.potter@amd.com long *ptid = (long *)ptidBuf.bufferPtr(); 134811886Sbrandon.potter@amd.com *ptid = cp->pid(); 134911886Sbrandon.potter@amd.com ptidBuf.copyOut(tc->getMemProxy()); 135011886Sbrandon.potter@amd.com } 135111886Sbrandon.potter@amd.com 135211886Sbrandon.potter@amd.com cp->initState(); 135311886Sbrandon.potter@amd.com p->clone(tc, ctc, cp, flags); 135411886Sbrandon.potter@amd.com 135511911SBrandon.Potter@amd.com if (flags & OS::TGT_CLONE_THREAD) { 135611911SBrandon.Potter@amd.com delete cp->sigchld; 135711911SBrandon.Potter@amd.com cp->sigchld = p->sigchld; 135811911SBrandon.Potter@amd.com } else if (flags & OS::TGT_SIGCHLD) { 135911911SBrandon.Potter@amd.com *cp->sigchld = true; 136011911SBrandon.Potter@amd.com } 136111911SBrandon.Potter@amd.com 136211886Sbrandon.potter@amd.com if (flags & OS::TGT_CLONE_CHILD_SETTID) { 136311886Sbrandon.potter@amd.com BufferArg ctidBuf(ctidPtr, sizeof(long)); 136411886Sbrandon.potter@amd.com long *ctid = (long *)ctidBuf.bufferPtr(); 136511886Sbrandon.potter@amd.com *ctid = cp->pid(); 136611886Sbrandon.potter@amd.com ctidBuf.copyOut(ctc->getMemProxy()); 136711886Sbrandon.potter@amd.com } 136811886Sbrandon.potter@amd.com 136911886Sbrandon.potter@amd.com if (flags & OS::TGT_CLONE_CHILD_CLEARTID) 137011886Sbrandon.potter@amd.com cp->childClearTID = (uint64_t)ctidPtr; 137111886Sbrandon.potter@amd.com 137211886Sbrandon.potter@amd.com ctc->clearArchRegs(); 137311886Sbrandon.potter@amd.com 137413536Sandreas.sandberg@arm.com OS::archClone(flags, p, cp, tc, ctc, newStack, tlsPtr); 137511886Sbrandon.potter@amd.com 137611886Sbrandon.potter@amd.com cp->setSyscallReturn(ctc, 0); 137711886Sbrandon.potter@amd.com 137811886Sbrandon.potter@amd.com#if THE_ISA == ALPHA_ISA 137911886Sbrandon.potter@amd.com ctc->setIntReg(TheISA::SyscallSuccessReg, 0); 138011886Sbrandon.potter@amd.com#elif THE_ISA == SPARC_ISA 138111886Sbrandon.potter@amd.com tc->setIntReg(TheISA::SyscallPseudoReturnReg, 0); 138211886Sbrandon.potter@amd.com ctc->setIntReg(TheISA::SyscallPseudoReturnReg, 1); 138311886Sbrandon.potter@amd.com#endif 138411886Sbrandon.potter@amd.com 138513535Sandreas.sandberg@arm.com TheISA::PCState cpc = tc->pcState(); 138613535Sandreas.sandberg@arm.com cpc.advance(); 138713535Sandreas.sandberg@arm.com ctc->pcState(cpc); 138811886Sbrandon.potter@amd.com ctc->activate(); 138911886Sbrandon.potter@amd.com 139011886Sbrandon.potter@amd.com return cp->pid(); 139111886Sbrandon.potter@amd.com} 13921706SN/A 13931706SN/A/// Target fstatfs() handler. 13941706SN/Atemplate <class OS> 13951706SN/ASyscallReturn 139611856Sbrandon.potter@amd.comfstatfsFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 13971706SN/A{ 13986701Sgblack@eecs.umich.edu int index = 0; 139911856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 140011856Sbrandon.potter@amd.com Addr bufPtr = p->getSyscallArg(tc, index); 14011706SN/A 140211856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 140311856Sbrandon.potter@amd.com if (!ffdp) 14041706SN/A return -EBADF; 140511856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 14061706SN/A 14071706SN/A struct statfs hostBuf; 140810931Sbrandon.potter@amd.com int result = fstatfs(sim_fd, &hostBuf); 14091706SN/A 14101706SN/A if (result < 0) 14112218SN/A return -errno; 14121706SN/A 141311759Sbrandon.potter@amd.com copyOutStatfsBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 14141706SN/A 14151706SN/A return 0; 14161706SN/A} 14171706SN/A 14181706SN/A 14191999SN/A/// Target writev() handler. 14201999SN/Atemplate <class OS> 14211999SN/ASyscallReturn 142211856Sbrandon.potter@amd.comwritevFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 14231999SN/A{ 14246701Sgblack@eecs.umich.edu int index = 0; 142511856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 142610931Sbrandon.potter@amd.com 142711856Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 142811856Sbrandon.potter@amd.com if (!hbfdp) 14291999SN/A return -EBADF; 143011856Sbrandon.potter@amd.com int sim_fd = hbfdp->getSimFD(); 14311999SN/A 143211856Sbrandon.potter@amd.com SETranslatingPortProxy &prox = tc->getMemProxy(); 143311856Sbrandon.potter@amd.com uint64_t tiov_base = p->getSyscallArg(tc, index); 143411856Sbrandon.potter@amd.com size_t count = p->getSyscallArg(tc, index); 14351999SN/A struct iovec hiov[count]; 14366227Snate@binkert.org for (size_t i = 0; i < count; ++i) { 14371999SN/A typename OS::tgt_iovec tiov; 14382461SN/A 143911856Sbrandon.potter@amd.com prox.readBlob(tiov_base + i*sizeof(typename OS::tgt_iovec), 144011856Sbrandon.potter@amd.com (uint8_t*)&tiov, sizeof(typename OS::tgt_iovec)); 14418737Skoansin.tan@gmail.com hiov[i].iov_len = TheISA::gtoh(tiov.iov_len); 14421999SN/A hiov[i].iov_base = new char [hiov[i].iov_len]; 144311856Sbrandon.potter@amd.com prox.readBlob(TheISA::gtoh(tiov.iov_base), (uint8_t *)hiov[i].iov_base, 144411856Sbrandon.potter@amd.com hiov[i].iov_len); 14451999SN/A } 14461999SN/A 144710931Sbrandon.potter@amd.com int result = writev(sim_fd, hiov, count); 14481999SN/A 14496227Snate@binkert.org for (size_t i = 0; i < count; ++i) 14501999SN/A delete [] (char *)hiov[i].iov_base; 14511999SN/A 14521999SN/A if (result < 0) 14532218SN/A return -errno; 14541999SN/A 145510629Sjthestness@gmail.com return result; 14561999SN/A} 14571999SN/A 145811385Sbrandon.potter@amd.com/// Real mmap handler. 1459360SN/Atemplate <class OS> 14601450SN/ASyscallReturn 146111851Sbrandon.potter@amd.commmapImpl(SyscallDesc *desc, int num, Process *p, ThreadContext *tc, 146211385Sbrandon.potter@amd.com bool is_mmap2) 1463360SN/A{ 14646701Sgblack@eecs.umich.edu int index = 0; 14656701Sgblack@eecs.umich.edu Addr start = p->getSyscallArg(tc, index); 14666701Sgblack@eecs.umich.edu uint64_t length = p->getSyscallArg(tc, index); 146711383Sbrandon.potter@amd.com int prot = p->getSyscallArg(tc, index); 146811383Sbrandon.potter@amd.com int tgt_flags = p->getSyscallArg(tc, index); 14698324Ssteve.reinhardt@amd.com int tgt_fd = p->getSyscallArg(tc, index); 147010486Stjablin@gmail.com int offset = p->getSyscallArg(tc, index); 1471360SN/A 147211385Sbrandon.potter@amd.com if (is_mmap2) 147311385Sbrandon.potter@amd.com offset *= TheISA::PageBytes; 14749008Sgblack@eecs.umich.edu 147511383Sbrandon.potter@amd.com if (start & (TheISA::PageBytes - 1) || 147611383Sbrandon.potter@amd.com offset & (TheISA::PageBytes - 1) || 147711383Sbrandon.potter@amd.com (tgt_flags & OS::TGT_MAP_PRIVATE && 147811383Sbrandon.potter@amd.com tgt_flags & OS::TGT_MAP_SHARED) || 147911383Sbrandon.potter@amd.com (!(tgt_flags & OS::TGT_MAP_PRIVATE) && 148011383Sbrandon.potter@amd.com !(tgt_flags & OS::TGT_MAP_SHARED)) || 148111383Sbrandon.potter@amd.com !length) { 148211383Sbrandon.potter@amd.com return -EINVAL; 148311383Sbrandon.potter@amd.com } 14848324Ssteve.reinhardt@amd.com 148511383Sbrandon.potter@amd.com if ((prot & PROT_WRITE) && (tgt_flags & OS::TGT_MAP_SHARED)) { 148611383Sbrandon.potter@amd.com // With shared mmaps, there are two cases to consider: 148711383Sbrandon.potter@amd.com // 1) anonymous: writes should modify the mapping and this should be 148811383Sbrandon.potter@amd.com // visible to observers who share the mapping. Currently, it's 148911383Sbrandon.potter@amd.com // difficult to update the shared mapping because there's no 149011383Sbrandon.potter@amd.com // structure which maintains information about the which virtual 149111383Sbrandon.potter@amd.com // memory areas are shared. If that structure existed, it would be 149211383Sbrandon.potter@amd.com // possible to make the translations point to the same frames. 149311383Sbrandon.potter@amd.com // 2) file-backed: writes should modify the mapping and the file 149411383Sbrandon.potter@amd.com // which is backed by the mapping. The shared mapping problem is the 149511383Sbrandon.potter@amd.com // same as what was mentioned about the anonymous mappings. For 149611383Sbrandon.potter@amd.com // file-backed mappings, the writes to the file are difficult 149711383Sbrandon.potter@amd.com // because it requires syncing what the mapping holds with the file 149811383Sbrandon.potter@amd.com // that resides on the host system. So, any write on a real system 149911383Sbrandon.potter@amd.com // would cause the change to be propagated to the file mapping at 150011383Sbrandon.potter@amd.com // some point in the future (the inode is tracked along with the 150111383Sbrandon.potter@amd.com // mapping). This isn't guaranteed to always happen, but it usually 150211383Sbrandon.potter@amd.com // works well enough. The guarantee is provided by the msync system 150311383Sbrandon.potter@amd.com // call. We could force the change through with shared mappings with 150411383Sbrandon.potter@amd.com // a call to msync, but that again would require more information 150511383Sbrandon.potter@amd.com // than we currently maintain. 150611383Sbrandon.potter@amd.com warn("mmap: writing to shared mmap region is currently " 150711383Sbrandon.potter@amd.com "unsupported. The write succeeds on the target, but it " 150811383Sbrandon.potter@amd.com "will not be propagated to the host or shared mappings"); 15098324Ssteve.reinhardt@amd.com } 15105877Shsul@eecs.umich.edu 151110486Stjablin@gmail.com length = roundUp(length, TheISA::PageBytes); 151210486Stjablin@gmail.com 151311383Sbrandon.potter@amd.com int sim_fd = -1; 151411383Sbrandon.potter@amd.com uint8_t *pmap = nullptr; 151511383Sbrandon.potter@amd.com if (!(tgt_flags & OS::TGT_MAP_ANONYMOUS)) { 151611856Sbrandon.potter@amd.com std::shared_ptr<FDEntry> fdep = (*p->fds)[tgt_fd]; 151711624Smichael.lebeane@amd.com 151811856Sbrandon.potter@amd.com auto dfdp = std::dynamic_pointer_cast<DeviceFDEntry>(fdep); 151911856Sbrandon.potter@amd.com if (dfdp) { 152011856Sbrandon.potter@amd.com EmulatedDriver *emul_driver = dfdp->getDriver(); 152111856Sbrandon.potter@amd.com return emul_driver->mmap(p, tc, start, length, prot, 152211624Smichael.lebeane@amd.com tgt_flags, tgt_fd, offset); 152311624Smichael.lebeane@amd.com } 152411624Smichael.lebeane@amd.com 152511856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(fdep); 152611856Sbrandon.potter@amd.com if (!ffdp) 152711383Sbrandon.potter@amd.com return -EBADF; 152811856Sbrandon.potter@amd.com sim_fd = ffdp->getSimFD(); 1529360SN/A 153011913SBrandon.Potter@amd.com pmap = (decltype(pmap))mmap(nullptr, length, PROT_READ, MAP_PRIVATE, 153111383Sbrandon.potter@amd.com sim_fd, offset); 15328600Ssteve.reinhardt@amd.com 153311383Sbrandon.potter@amd.com if (pmap == (decltype(pmap))-1) { 153411383Sbrandon.potter@amd.com warn("mmap: failed to map file into host address space"); 153511383Sbrandon.potter@amd.com return -errno; 15368600Ssteve.reinhardt@amd.com } 15372544SN/A } 15382544SN/A 153911383Sbrandon.potter@amd.com // Extend global mmap region if necessary. Note that we ignore the 154011383Sbrandon.potter@amd.com // start address unless MAP_FIXED is specified. 154111383Sbrandon.potter@amd.com if (!(tgt_flags & OS::TGT_MAP_FIXED)) { 154211905SBrandon.Potter@amd.com std::shared_ptr<MemState> mem_state = p->memState; 154311905SBrandon.Potter@amd.com Addr mmap_end = mem_state->getMmapEnd(); 154411905SBrandon.Potter@amd.com 154511905SBrandon.Potter@amd.com start = p->mmapGrowsDown() ? mmap_end - length : mmap_end; 154611905SBrandon.Potter@amd.com mmap_end = p->mmapGrowsDown() ? start : mmap_end + length; 154711905SBrandon.Potter@amd.com 154811905SBrandon.Potter@amd.com mem_state->setMmapEnd(mmap_end); 154911383Sbrandon.potter@amd.com } 155011383Sbrandon.potter@amd.com 155111383Sbrandon.potter@amd.com DPRINTF_SYSCALL(Verbose, " mmap range is 0x%x - 0x%x\n", 155211383Sbrandon.potter@amd.com start, start + length - 1); 155311383Sbrandon.potter@amd.com 155411383Sbrandon.potter@amd.com // We only allow mappings to overwrite existing mappings if 155511383Sbrandon.potter@amd.com // TGT_MAP_FIXED is set. Otherwise it shouldn't be a problem 155611383Sbrandon.potter@amd.com // because we ignore the start hint if TGT_MAP_FIXED is not set. 155711383Sbrandon.potter@amd.com int clobber = tgt_flags & OS::TGT_MAP_FIXED; 155811383Sbrandon.potter@amd.com if (clobber) { 155911383Sbrandon.potter@amd.com for (auto tc : p->system->threadContexts) { 156011383Sbrandon.potter@amd.com // If we might be overwriting old mappings, we need to 156111383Sbrandon.potter@amd.com // invalidate potentially stale mappings out of the TLBs. 156211383Sbrandon.potter@amd.com tc->getDTBPtr()->flushAll(); 156311383Sbrandon.potter@amd.com tc->getITBPtr()->flushAll(); 15648600Ssteve.reinhardt@amd.com } 15656672Sgblack@eecs.umich.edu } 15668600Ssteve.reinhardt@amd.com 156711383Sbrandon.potter@amd.com // Allocate physical memory and map it in. If the page table is already 156811383Sbrandon.potter@amd.com // mapped and clobber is not set, the simulator will issue throw a 156911383Sbrandon.potter@amd.com // fatal and bail out of the simulation. 15708601Ssteve.reinhardt@amd.com p->allocateMem(start, length, clobber); 15712544SN/A 157211383Sbrandon.potter@amd.com // Transfer content into target address space. 157311383Sbrandon.potter@amd.com SETranslatingPortProxy &tp = tc->getMemProxy(); 157411383Sbrandon.potter@amd.com if (tgt_flags & OS::TGT_MAP_ANONYMOUS) { 157511383Sbrandon.potter@amd.com // In general, we should zero the mapped area for anonymous mappings, 157611383Sbrandon.potter@amd.com // with something like: 157711383Sbrandon.potter@amd.com // tp.memsetBlob(start, 0, length); 157811383Sbrandon.potter@amd.com // However, given that we don't support sparse mappings, and 157911383Sbrandon.potter@amd.com // some applications can map a couple of gigabytes of space 158011383Sbrandon.potter@amd.com // (intending sparse usage), that can get painfully expensive. 158111383Sbrandon.potter@amd.com // Fortunately, since we don't properly implement munmap either, 158211383Sbrandon.potter@amd.com // there's no danger of remapping used memory, so for now all 158311383Sbrandon.potter@amd.com // newly mapped memory should already be zeroed so we can skip it. 158411383Sbrandon.potter@amd.com } else { 158511383Sbrandon.potter@amd.com // It is possible to mmap an area larger than a file, however 158611383Sbrandon.potter@amd.com // accessing unmapped portions the system triggers a "Bus error" 158711383Sbrandon.potter@amd.com // on the host. We must know when to stop copying the file from 158811383Sbrandon.potter@amd.com // the host into the target address space. 158911383Sbrandon.potter@amd.com struct stat file_stat; 159011383Sbrandon.potter@amd.com if (fstat(sim_fd, &file_stat) > 0) 159111383Sbrandon.potter@amd.com fatal("mmap: cannot stat file"); 159211383Sbrandon.potter@amd.com 159311383Sbrandon.potter@amd.com // Copy the portion of the file that is resident. This requires 159411383Sbrandon.potter@amd.com // checking both the mmap size and the filesize that we are 159511383Sbrandon.potter@amd.com // trying to mmap into this space; the mmap size also depends 159611383Sbrandon.potter@amd.com // on the specified offset into the file. 159711383Sbrandon.potter@amd.com uint64_t size = std::min((uint64_t)file_stat.st_size - offset, 159811383Sbrandon.potter@amd.com length); 159911383Sbrandon.potter@amd.com tp.writeBlob(start, pmap, size); 160011383Sbrandon.potter@amd.com 160111383Sbrandon.potter@amd.com // Cleanup the mmap region before exiting this function. 160211383Sbrandon.potter@amd.com munmap(pmap, length); 160311383Sbrandon.potter@amd.com 160411392Sbrandon.potter@amd.com // Maintain the symbol table for dynamic executables. 160511392Sbrandon.potter@amd.com // The loader will call mmap to map the images into its address 160611392Sbrandon.potter@amd.com // space and we intercept that here. We can verify that we are 160711392Sbrandon.potter@amd.com // executing inside the loader by checking the program counter value. 160811392Sbrandon.potter@amd.com // XXX: with multiprogrammed workloads or multi-node configurations, 160911392Sbrandon.potter@amd.com // this will not work since there is a single global symbol table. 161011392Sbrandon.potter@amd.com ObjectFile *interpreter = p->getInterpreter(); 161111392Sbrandon.potter@amd.com if (interpreter) { 161211392Sbrandon.potter@amd.com Addr text_start = interpreter->textBase(); 161311392Sbrandon.potter@amd.com Addr text_end = text_start + interpreter->textSize(); 161411392Sbrandon.potter@amd.com 161511392Sbrandon.potter@amd.com Addr pc = tc->pcState().pc(); 161611392Sbrandon.potter@amd.com 161711392Sbrandon.potter@amd.com if (pc >= text_start && pc < text_end) { 161811856Sbrandon.potter@amd.com std::shared_ptr<FDEntry> fdep = (*p->fds)[tgt_fd]; 161911856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(fdep); 162011856Sbrandon.potter@amd.com ObjectFile *lib = createObjectFile(ffdp->getFileName()); 162111392Sbrandon.potter@amd.com 162211392Sbrandon.potter@amd.com if (lib) { 162311392Sbrandon.potter@amd.com lib->loadAllSymbols(debugSymbolTable, 162411392Sbrandon.potter@amd.com lib->textBase(), start); 162511392Sbrandon.potter@amd.com } 162611392Sbrandon.potter@amd.com } 162711392Sbrandon.potter@amd.com } 162811392Sbrandon.potter@amd.com 162911383Sbrandon.potter@amd.com // Note that we do not zero out the remainder of the mapping. This 163011383Sbrandon.potter@amd.com // is done by a real system, but it probably will not affect 163111383Sbrandon.potter@amd.com // execution (hopefully). 163211383Sbrandon.potter@amd.com } 163311383Sbrandon.potter@amd.com 16341458SN/A return start; 1635360SN/A} 1636360SN/A 163711593Santhony.gutierrez@amd.comtemplate <class OS> 163811593Santhony.gutierrez@amd.comSyscallReturn 163911851Sbrandon.potter@amd.compwrite64Func(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 164011593Santhony.gutierrez@amd.com{ 164111593Santhony.gutierrez@amd.com int index = 0; 164211593Santhony.gutierrez@amd.com int tgt_fd = p->getSyscallArg(tc, index); 164311593Santhony.gutierrez@amd.com Addr bufPtr = p->getSyscallArg(tc, index); 164411593Santhony.gutierrez@amd.com int nbytes = p->getSyscallArg(tc, index); 164511593Santhony.gutierrez@amd.com int offset = p->getSyscallArg(tc, index); 164611593Santhony.gutierrez@amd.com 164711856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 164811856Sbrandon.potter@amd.com if (!ffdp) 164911593Santhony.gutierrez@amd.com return -EBADF; 165011856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 165111593Santhony.gutierrez@amd.com 165211593Santhony.gutierrez@amd.com BufferArg bufArg(bufPtr, nbytes); 165311593Santhony.gutierrez@amd.com bufArg.copyIn(tc->getMemProxy()); 165411593Santhony.gutierrez@amd.com 165511594Santhony.gutierrez@amd.com int bytes_written = pwrite(sim_fd, bufArg.bufferPtr(), nbytes, offset); 165611593Santhony.gutierrez@amd.com 165711593Santhony.gutierrez@amd.com return (bytes_written == -1) ? -errno : bytes_written; 165811593Santhony.gutierrez@amd.com} 165911593Santhony.gutierrez@amd.com 166011385Sbrandon.potter@amd.com/// Target mmap() handler. 166111385Sbrandon.potter@amd.comtemplate <class OS> 166211385Sbrandon.potter@amd.comSyscallReturn 166311851Sbrandon.potter@amd.commmapFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 166411385Sbrandon.potter@amd.com{ 166511385Sbrandon.potter@amd.com return mmapImpl<OS>(desc, num, p, tc, false); 166611385Sbrandon.potter@amd.com} 166711385Sbrandon.potter@amd.com 166811385Sbrandon.potter@amd.com/// Target mmap2() handler. 166911385Sbrandon.potter@amd.comtemplate <class OS> 167011385Sbrandon.potter@amd.comSyscallReturn 167111851Sbrandon.potter@amd.commmap2Func(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 167211385Sbrandon.potter@amd.com{ 167311385Sbrandon.potter@amd.com return mmapImpl<OS>(desc, num, p, tc, true); 167411385Sbrandon.potter@amd.com} 167511385Sbrandon.potter@amd.com 1676378SN/A/// Target getrlimit() handler. 1677360SN/Atemplate <class OS> 16781450SN/ASyscallReturn 167911851Sbrandon.potter@amd.comgetrlimitFunc(SyscallDesc *desc, int callnum, Process *process, 168011851Sbrandon.potter@amd.com ThreadContext *tc) 1681360SN/A{ 16826701Sgblack@eecs.umich.edu int index = 0; 16836701Sgblack@eecs.umich.edu unsigned resource = process->getSyscallArg(tc, index); 16846701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::rlimit> rlp(process->getSyscallArg(tc, index)); 1685360SN/A 1686360SN/A switch (resource) { 168711906SBrandon.Potter@amd.com case OS::TGT_RLIMIT_STACK: 168811906SBrandon.Potter@amd.com // max stack size in bytes: make up a number (8MB for now) 168911906SBrandon.Potter@amd.com rlp->rlim_cur = rlp->rlim_max = 8 * 1024 * 1024; 169011906SBrandon.Potter@amd.com rlp->rlim_cur = TheISA::htog(rlp->rlim_cur); 169111906SBrandon.Potter@amd.com rlp->rlim_max = TheISA::htog(rlp->rlim_max); 169211906SBrandon.Potter@amd.com break; 1693360SN/A 169411906SBrandon.Potter@amd.com case OS::TGT_RLIMIT_DATA: 169511906SBrandon.Potter@amd.com // max data segment size in bytes: make up a number 169611906SBrandon.Potter@amd.com rlp->rlim_cur = rlp->rlim_max = 256 * 1024 * 1024; 169711906SBrandon.Potter@amd.com rlp->rlim_cur = TheISA::htog(rlp->rlim_cur); 169811906SBrandon.Potter@amd.com rlp->rlim_max = TheISA::htog(rlp->rlim_max); 169911906SBrandon.Potter@amd.com break; 17005877Shsul@eecs.umich.edu 170111906SBrandon.Potter@amd.com default: 170211906SBrandon.Potter@amd.com warn("getrlimit: unimplemented resource %d", resource); 170311906SBrandon.Potter@amd.com return -EINVAL; 170411906SBrandon.Potter@amd.com break; 1705360SN/A } 1706360SN/A 17078706Sandreas.hansson@arm.com rlp.copyOut(tc->getMemProxy()); 17081458SN/A return 0; 1709360SN/A} 1710360SN/A 171112235Sar4jc@virginia.edutemplate <class OS> 171212235Sar4jc@virginia.eduSyscallReturn 171312235Sar4jc@virginia.eduprlimitFunc(SyscallDesc *desc, int callnum, Process *process, 171412235Sar4jc@virginia.edu ThreadContext *tc) 171512235Sar4jc@virginia.edu{ 171612235Sar4jc@virginia.edu int index = 0; 171712235Sar4jc@virginia.edu if (process->getSyscallArg(tc, index) != 0) 171812235Sar4jc@virginia.edu { 171912235Sar4jc@virginia.edu warn("prlimit: ignoring rlimits for nonzero pid"); 172012235Sar4jc@virginia.edu return -EPERM; 172112235Sar4jc@virginia.edu } 172212235Sar4jc@virginia.edu int resource = process->getSyscallArg(tc, index); 172312235Sar4jc@virginia.edu Addr n = process->getSyscallArg(tc, index); 172412235Sar4jc@virginia.edu if (n != 0) 172512235Sar4jc@virginia.edu warn("prlimit: ignoring new rlimit"); 172612235Sar4jc@virginia.edu Addr o = process->getSyscallArg(tc, index); 172712235Sar4jc@virginia.edu if (o != 0) 172812235Sar4jc@virginia.edu { 172912416Sqtt2@cornell.edu TypedBufferArg<typename OS::rlimit> rlp(o); 173012235Sar4jc@virginia.edu switch (resource) { 173112235Sar4jc@virginia.edu case OS::TGT_RLIMIT_STACK: 173212235Sar4jc@virginia.edu // max stack size in bytes: make up a number (8MB for now) 173312235Sar4jc@virginia.edu rlp->rlim_cur = rlp->rlim_max = 8 * 1024 * 1024; 173412235Sar4jc@virginia.edu rlp->rlim_cur = TheISA::htog(rlp->rlim_cur); 173512235Sar4jc@virginia.edu rlp->rlim_max = TheISA::htog(rlp->rlim_max); 173612235Sar4jc@virginia.edu break; 173712235Sar4jc@virginia.edu case OS::TGT_RLIMIT_DATA: 173812235Sar4jc@virginia.edu // max data segment size in bytes: make up a number 173912235Sar4jc@virginia.edu rlp->rlim_cur = rlp->rlim_max = 256*1024*1024; 174012235Sar4jc@virginia.edu rlp->rlim_cur = TheISA::htog(rlp->rlim_cur); 174112235Sar4jc@virginia.edu rlp->rlim_max = TheISA::htog(rlp->rlim_max); 174212593Sjason@lowepower.com break; 174312235Sar4jc@virginia.edu default: 174412235Sar4jc@virginia.edu warn("prlimit: unimplemented resource %d", resource); 174512235Sar4jc@virginia.edu return -EINVAL; 174612235Sar4jc@virginia.edu break; 174712235Sar4jc@virginia.edu } 174812235Sar4jc@virginia.edu rlp.copyOut(tc->getMemProxy()); 174912235Sar4jc@virginia.edu } 175012235Sar4jc@virginia.edu return 0; 175112235Sar4jc@virginia.edu} 175212235Sar4jc@virginia.edu 175310796Sbrandon.potter@amd.com/// Target clock_gettime() function. 175410796Sbrandon.potter@amd.comtemplate <class OS> 175510796Sbrandon.potter@amd.comSyscallReturn 175611851Sbrandon.potter@amd.comclock_gettimeFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 175710796Sbrandon.potter@amd.com{ 175810796Sbrandon.potter@amd.com int index = 1; 175910796Sbrandon.potter@amd.com //int clk_id = p->getSyscallArg(tc, index); 176010796Sbrandon.potter@amd.com TypedBufferArg<typename OS::timespec> tp(p->getSyscallArg(tc, index)); 176110796Sbrandon.potter@amd.com 176210796Sbrandon.potter@amd.com getElapsedTimeNano(tp->tv_sec, tp->tv_nsec); 176310796Sbrandon.potter@amd.com tp->tv_sec += seconds_since_epoch; 176410796Sbrandon.potter@amd.com tp->tv_sec = TheISA::htog(tp->tv_sec); 176510796Sbrandon.potter@amd.com tp->tv_nsec = TheISA::htog(tp->tv_nsec); 176610796Sbrandon.potter@amd.com 176710796Sbrandon.potter@amd.com tp.copyOut(tc->getMemProxy()); 176810796Sbrandon.potter@amd.com 176910796Sbrandon.potter@amd.com return 0; 177010796Sbrandon.potter@amd.com} 177110796Sbrandon.potter@amd.com 177211337SMichael.Lebeane@amd.com/// Target clock_getres() function. 177311337SMichael.Lebeane@amd.comtemplate <class OS> 177411337SMichael.Lebeane@amd.comSyscallReturn 177511851Sbrandon.potter@amd.comclock_getresFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 177611337SMichael.Lebeane@amd.com{ 177711337SMichael.Lebeane@amd.com int index = 1; 177811337SMichael.Lebeane@amd.com TypedBufferArg<typename OS::timespec> tp(p->getSyscallArg(tc, index)); 177911337SMichael.Lebeane@amd.com 178011337SMichael.Lebeane@amd.com // Set resolution at ns, which is what clock_gettime() returns 178111337SMichael.Lebeane@amd.com tp->tv_sec = 0; 178211337SMichael.Lebeane@amd.com tp->tv_nsec = 1; 178311337SMichael.Lebeane@amd.com 178411337SMichael.Lebeane@amd.com tp.copyOut(tc->getMemProxy()); 178511337SMichael.Lebeane@amd.com 178611337SMichael.Lebeane@amd.com return 0; 178711337SMichael.Lebeane@amd.com} 178811337SMichael.Lebeane@amd.com 1789378SN/A/// Target gettimeofday() handler. 1790360SN/Atemplate <class OS> 17911450SN/ASyscallReturn 179211851Sbrandon.potter@amd.comgettimeofdayFunc(SyscallDesc *desc, int callnum, Process *process, 179311851Sbrandon.potter@amd.com ThreadContext *tc) 1794360SN/A{ 17956701Sgblack@eecs.umich.edu int index = 0; 17966701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::timeval> tp(process->getSyscallArg(tc, index)); 1797360SN/A 179810796Sbrandon.potter@amd.com getElapsedTimeMicro(tp->tv_sec, tp->tv_usec); 1799360SN/A tp->tv_sec += seconds_since_epoch; 18006109Ssanchezd@stanford.edu tp->tv_sec = TheISA::htog(tp->tv_sec); 18016109Ssanchezd@stanford.edu tp->tv_usec = TheISA::htog(tp->tv_usec); 1802360SN/A 18038706Sandreas.hansson@arm.com tp.copyOut(tc->getMemProxy()); 1804360SN/A 18051458SN/A return 0; 1806360SN/A} 1807360SN/A 1808360SN/A 18091999SN/A/// Target utimes() handler. 18101999SN/Atemplate <class OS> 18111999SN/ASyscallReturn 181211851Sbrandon.potter@amd.comutimesFunc(SyscallDesc *desc, int callnum, Process *process, 18132680Sktlim@umich.edu ThreadContext *tc) 18141999SN/A{ 18151999SN/A std::string path; 18161999SN/A 18176701Sgblack@eecs.umich.edu int index = 0; 18188852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 18196701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 18206701Sgblack@eecs.umich.edu return -EFAULT; 18216701Sgblack@eecs.umich.edu } 18221999SN/A 18236701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::timeval [2]> 18246701Sgblack@eecs.umich.edu tp(process->getSyscallArg(tc, index)); 18258706Sandreas.hansson@arm.com tp.copyIn(tc->getMemProxy()); 18261999SN/A 18271999SN/A struct timeval hostTimeval[2]; 182811906SBrandon.Potter@amd.com for (int i = 0; i < 2; ++i) { 18298737Skoansin.tan@gmail.com hostTimeval[i].tv_sec = TheISA::gtoh((*tp)[i].tv_sec); 18308737Skoansin.tan@gmail.com hostTimeval[i].tv_usec = TheISA::gtoh((*tp)[i].tv_usec); 18311999SN/A } 18323669Sbinkertn@umich.edu 18333669Sbinkertn@umich.edu // Adjust path for current working directory 18343669Sbinkertn@umich.edu path = process->fullPath(path); 18353669Sbinkertn@umich.edu 18361999SN/A int result = utimes(path.c_str(), hostTimeval); 18371999SN/A 18381999SN/A if (result < 0) 18391999SN/A return -errno; 18401999SN/A 18411999SN/A return 0; 18421999SN/A} 184311886Sbrandon.potter@amd.com 184411886Sbrandon.potter@amd.comtemplate <class OS> 184511886Sbrandon.potter@amd.comSyscallReturn 184611886Sbrandon.potter@amd.comexecveFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 184711886Sbrandon.potter@amd.com{ 184811886Sbrandon.potter@amd.com desc->setFlags(0); 184911886Sbrandon.potter@amd.com 185011886Sbrandon.potter@amd.com int index = 0; 185111886Sbrandon.potter@amd.com std::string path; 185211886Sbrandon.potter@amd.com SETranslatingPortProxy & mem_proxy = tc->getMemProxy(); 185311886Sbrandon.potter@amd.com if (!mem_proxy.tryReadString(path, p->getSyscallArg(tc, index))) 185411886Sbrandon.potter@amd.com return -EFAULT; 185511886Sbrandon.potter@amd.com 185611886Sbrandon.potter@amd.com if (access(path.c_str(), F_OK) == -1) 185711886Sbrandon.potter@amd.com return -EACCES; 185811886Sbrandon.potter@amd.com 185911886Sbrandon.potter@amd.com auto read_in = [](std::vector<std::string> & vect, 186011886Sbrandon.potter@amd.com SETranslatingPortProxy & mem_proxy, 186111886Sbrandon.potter@amd.com Addr mem_loc) 186211886Sbrandon.potter@amd.com { 186311886Sbrandon.potter@amd.com for (int inc = 0; ; inc++) { 186411886Sbrandon.potter@amd.com BufferArg b((mem_loc + sizeof(Addr) * inc), sizeof(Addr)); 186511886Sbrandon.potter@amd.com b.copyIn(mem_proxy); 186611886Sbrandon.potter@amd.com 186711886Sbrandon.potter@amd.com if (!*(Addr*)b.bufferPtr()) 186811886Sbrandon.potter@amd.com break; 186911886Sbrandon.potter@amd.com 187011886Sbrandon.potter@amd.com vect.push_back(std::string()); 187111886Sbrandon.potter@amd.com mem_proxy.tryReadString(vect[inc], *(Addr*)b.bufferPtr()); 187211886Sbrandon.potter@amd.com } 187311886Sbrandon.potter@amd.com }; 187411886Sbrandon.potter@amd.com 187511886Sbrandon.potter@amd.com /** 187611886Sbrandon.potter@amd.com * Note that ProcessParams is generated by swig and there are no other 187711886Sbrandon.potter@amd.com * examples of how to create anything but this default constructor. The 187811886Sbrandon.potter@amd.com * fields are manually initialized instead of passing parameters to the 187911886Sbrandon.potter@amd.com * constructor. 188011886Sbrandon.potter@amd.com */ 188111886Sbrandon.potter@amd.com ProcessParams *pp = new ProcessParams(); 188211886Sbrandon.potter@amd.com pp->executable = path; 188311886Sbrandon.potter@amd.com Addr argv_mem_loc = p->getSyscallArg(tc, index); 188411886Sbrandon.potter@amd.com read_in(pp->cmd, mem_proxy, argv_mem_loc); 188511886Sbrandon.potter@amd.com Addr envp_mem_loc = p->getSyscallArg(tc, index); 188611886Sbrandon.potter@amd.com read_in(pp->env, mem_proxy, envp_mem_loc); 188711886Sbrandon.potter@amd.com pp->uid = p->uid(); 188811886Sbrandon.potter@amd.com pp->egid = p->egid(); 188911886Sbrandon.potter@amd.com pp->euid = p->euid(); 189011886Sbrandon.potter@amd.com pp->gid = p->gid(); 189111886Sbrandon.potter@amd.com pp->ppid = p->ppid(); 189211886Sbrandon.potter@amd.com pp->pid = p->pid(); 189311886Sbrandon.potter@amd.com pp->input.assign("cin"); 189411886Sbrandon.potter@amd.com pp->output.assign("cout"); 189511886Sbrandon.potter@amd.com pp->errout.assign("cerr"); 189611886Sbrandon.potter@amd.com pp->cwd.assign(p->getcwd()); 189711886Sbrandon.potter@amd.com pp->system = p->system; 189811886Sbrandon.potter@amd.com /** 189911886Sbrandon.potter@amd.com * Prevent process object creation with identical PIDs (which will trip 190011886Sbrandon.potter@amd.com * a fatal check in Process constructor). The execve call is supposed to 190111886Sbrandon.potter@amd.com * take over the currently executing process' identity but replace 190211886Sbrandon.potter@amd.com * whatever it is doing with a new process image. Instead of hijacking 190311886Sbrandon.potter@amd.com * the process object in the simulator, we create a new process object 190411886Sbrandon.potter@amd.com * and bind to the previous process' thread below (hijacking the thread). 190511886Sbrandon.potter@amd.com */ 190611886Sbrandon.potter@amd.com p->system->PIDs.erase(p->pid()); 190711886Sbrandon.potter@amd.com Process *new_p = pp->create(); 190811886Sbrandon.potter@amd.com delete pp; 190911886Sbrandon.potter@amd.com 191011886Sbrandon.potter@amd.com /** 191111886Sbrandon.potter@amd.com * Work through the file descriptor array and close any files marked 191211886Sbrandon.potter@amd.com * close-on-exec. 191311886Sbrandon.potter@amd.com */ 191411886Sbrandon.potter@amd.com new_p->fds = p->fds; 191511886Sbrandon.potter@amd.com for (int i = 0; i < new_p->fds->getSize(); i++) { 191611886Sbrandon.potter@amd.com std::shared_ptr<FDEntry> fdep = (*new_p->fds)[i]; 191711886Sbrandon.potter@amd.com if (fdep && fdep->getCOE()) 191811886Sbrandon.potter@amd.com new_p->fds->closeFDEntry(i); 191911886Sbrandon.potter@amd.com } 192011886Sbrandon.potter@amd.com 192111886Sbrandon.potter@amd.com *new_p->sigchld = true; 192211886Sbrandon.potter@amd.com 192311886Sbrandon.potter@amd.com delete p; 192411886Sbrandon.potter@amd.com tc->clearArchRegs(); 192511886Sbrandon.potter@amd.com tc->setProcessPtr(new_p); 192611886Sbrandon.potter@amd.com new_p->assignThreadContext(tc->contextId()); 192711886Sbrandon.potter@amd.com new_p->initState(); 192811886Sbrandon.potter@amd.com tc->activate(); 192911886Sbrandon.potter@amd.com TheISA::PCState pcState = tc->pcState(); 193011886Sbrandon.potter@amd.com tc->setNPC(pcState.instAddr()); 193111886Sbrandon.potter@amd.com 193211886Sbrandon.potter@amd.com desc->setFlags(SyscallDesc::SuppressReturnValue); 193311886Sbrandon.potter@amd.com return 0; 193411886Sbrandon.potter@amd.com} 193511886Sbrandon.potter@amd.com 1936378SN/A/// Target getrusage() function. 1937360SN/Atemplate <class OS> 19381450SN/ASyscallReturn 193911851Sbrandon.potter@amd.comgetrusageFunc(SyscallDesc *desc, int callnum, Process *process, 19402680Sktlim@umich.edu ThreadContext *tc) 1941360SN/A{ 19426701Sgblack@eecs.umich.edu int index = 0; 19436701Sgblack@eecs.umich.edu int who = process->getSyscallArg(tc, index); // THREAD, SELF, or CHILDREN 19446701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::rusage> rup(process->getSyscallArg(tc, index)); 1945360SN/A 19463670Sbinkertn@umich.edu rup->ru_utime.tv_sec = 0; 19473670Sbinkertn@umich.edu rup->ru_utime.tv_usec = 0; 1948360SN/A rup->ru_stime.tv_sec = 0; 1949360SN/A rup->ru_stime.tv_usec = 0; 1950360SN/A rup->ru_maxrss = 0; 1951360SN/A rup->ru_ixrss = 0; 1952360SN/A rup->ru_idrss = 0; 1953360SN/A rup->ru_isrss = 0; 1954360SN/A rup->ru_minflt = 0; 1955360SN/A rup->ru_majflt = 0; 1956360SN/A rup->ru_nswap = 0; 1957360SN/A rup->ru_inblock = 0; 1958360SN/A rup->ru_oublock = 0; 1959360SN/A rup->ru_msgsnd = 0; 1960360SN/A rup->ru_msgrcv = 0; 1961360SN/A rup->ru_nsignals = 0; 1962360SN/A rup->ru_nvcsw = 0; 1963360SN/A rup->ru_nivcsw = 0; 1964360SN/A 19653670Sbinkertn@umich.edu switch (who) { 19663670Sbinkertn@umich.edu case OS::TGT_RUSAGE_SELF: 196710796Sbrandon.potter@amd.com getElapsedTimeMicro(rup->ru_utime.tv_sec, rup->ru_utime.tv_usec); 19688737Skoansin.tan@gmail.com rup->ru_utime.tv_sec = TheISA::htog(rup->ru_utime.tv_sec); 19698737Skoansin.tan@gmail.com rup->ru_utime.tv_usec = TheISA::htog(rup->ru_utime.tv_usec); 19703670Sbinkertn@umich.edu break; 19713670Sbinkertn@umich.edu 19723670Sbinkertn@umich.edu case OS::TGT_RUSAGE_CHILDREN: 19733670Sbinkertn@umich.edu // do nothing. We have no child processes, so they take no time. 19743670Sbinkertn@umich.edu break; 19753670Sbinkertn@umich.edu 19763670Sbinkertn@umich.edu default: 19773670Sbinkertn@umich.edu // don't really handle THREAD or CHILDREN, but just warn and 19783670Sbinkertn@umich.edu // plow ahead 19793670Sbinkertn@umich.edu warn("getrusage() only supports RUSAGE_SELF. Parameter %d ignored.", 19803670Sbinkertn@umich.edu who); 19813670Sbinkertn@umich.edu } 19823670Sbinkertn@umich.edu 19838706Sandreas.hansson@arm.com rup.copyOut(tc->getMemProxy()); 1984360SN/A 19851458SN/A return 0; 1986360SN/A} 1987360SN/A 19886683Stjones1@inf.ed.ac.uk/// Target times() function. 19896683Stjones1@inf.ed.ac.uktemplate <class OS> 19906683Stjones1@inf.ed.ac.ukSyscallReturn 199111851Sbrandon.potter@amd.comtimesFunc(SyscallDesc *desc, int callnum, Process *process, 199211851Sbrandon.potter@amd.com ThreadContext *tc) 19936683Stjones1@inf.ed.ac.uk{ 19946701Sgblack@eecs.umich.edu int index = 0; 19956701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::tms> bufp(process->getSyscallArg(tc, index)); 19966683Stjones1@inf.ed.ac.uk 19976683Stjones1@inf.ed.ac.uk // Fill in the time structure (in clocks) 19987823Ssteve.reinhardt@amd.com int64_t clocks = curTick() * OS::M5_SC_CLK_TCK / SimClock::Int::s; 19996683Stjones1@inf.ed.ac.uk bufp->tms_utime = clocks; 20006683Stjones1@inf.ed.ac.uk bufp->tms_stime = 0; 20016683Stjones1@inf.ed.ac.uk bufp->tms_cutime = 0; 20026683Stjones1@inf.ed.ac.uk bufp->tms_cstime = 0; 20036683Stjones1@inf.ed.ac.uk 20046683Stjones1@inf.ed.ac.uk // Convert to host endianness 20058737Skoansin.tan@gmail.com bufp->tms_utime = TheISA::htog(bufp->tms_utime); 20066683Stjones1@inf.ed.ac.uk 20076683Stjones1@inf.ed.ac.uk // Write back 20088706Sandreas.hansson@arm.com bufp.copyOut(tc->getMemProxy()); 20096683Stjones1@inf.ed.ac.uk 20106683Stjones1@inf.ed.ac.uk // Return clock ticks since system boot 20116683Stjones1@inf.ed.ac.uk return clocks; 20126683Stjones1@inf.ed.ac.uk} 20132553SN/A 20146684Stjones1@inf.ed.ac.uk/// Target time() function. 20156684Stjones1@inf.ed.ac.uktemplate <class OS> 20166684Stjones1@inf.ed.ac.ukSyscallReturn 201711851Sbrandon.potter@amd.comtimeFunc(SyscallDesc *desc, int callnum, Process *process, ThreadContext *tc) 20186684Stjones1@inf.ed.ac.uk{ 20196684Stjones1@inf.ed.ac.uk typename OS::time_t sec, usec; 202010796Sbrandon.potter@amd.com getElapsedTimeMicro(sec, usec); 20216684Stjones1@inf.ed.ac.uk sec += seconds_since_epoch; 20226684Stjones1@inf.ed.ac.uk 20236701Sgblack@eecs.umich.edu int index = 0; 20246701Sgblack@eecs.umich.edu Addr taddr = (Addr)process->getSyscallArg(tc, index); 202511321Ssteve.reinhardt@amd.com if (taddr != 0) { 20266684Stjones1@inf.ed.ac.uk typename OS::time_t t = sec; 20278737Skoansin.tan@gmail.com t = TheISA::htog(t); 20288852Sandreas.hansson@arm.com SETranslatingPortProxy &p = tc->getMemProxy(); 20298852Sandreas.hansson@arm.com p.writeBlob(taddr, (uint8_t*)&t, (int)sizeof(typename OS::time_t)); 20306684Stjones1@inf.ed.ac.uk } 20316684Stjones1@inf.ed.ac.uk return sec; 20326684Stjones1@inf.ed.ac.uk} 20332553SN/A 203411910SBrandon.Potter@amd.comtemplate <class OS> 203511910SBrandon.Potter@amd.comSyscallReturn 203611910SBrandon.Potter@amd.comtgkillFunc(SyscallDesc *desc, int num, Process *process, ThreadContext *tc) 203711910SBrandon.Potter@amd.com{ 203811910SBrandon.Potter@amd.com int index = 0; 203911910SBrandon.Potter@amd.com int tgid = process->getSyscallArg(tc, index); 204011910SBrandon.Potter@amd.com int tid = process->getSyscallArg(tc, index); 204111910SBrandon.Potter@amd.com int sig = process->getSyscallArg(tc, index); 204211910SBrandon.Potter@amd.com 204311910SBrandon.Potter@amd.com /** 204411910SBrandon.Potter@amd.com * This system call is intended to allow killing a specific thread 204511910SBrandon.Potter@amd.com * within an arbitrary thread group if sanctioned with permission checks. 204611910SBrandon.Potter@amd.com * It's usually true that threads share the termination signal as pointed 204711910SBrandon.Potter@amd.com * out by the pthread_kill man page and this seems to be the intended 204811910SBrandon.Potter@amd.com * usage. Due to this being an emulated environment, assume the following: 204911910SBrandon.Potter@amd.com * Threads are allowed to call tgkill because the EUID for all threads 205011910SBrandon.Potter@amd.com * should be the same. There is no signal handling mechanism for kernel 205111910SBrandon.Potter@amd.com * registration of signal handlers since signals are poorly supported in 205211910SBrandon.Potter@amd.com * emulation mode. Since signal handlers cannot be registered, all 205311910SBrandon.Potter@amd.com * threads within in a thread group must share the termination signal. 205411910SBrandon.Potter@amd.com * We never exhaust PIDs so there's no chance of finding the wrong one 205511910SBrandon.Potter@amd.com * due to PID rollover. 205611910SBrandon.Potter@amd.com */ 205711910SBrandon.Potter@amd.com 205811910SBrandon.Potter@amd.com System *sys = tc->getSystemPtr(); 205911910SBrandon.Potter@amd.com Process *tgt_proc = nullptr; 206011910SBrandon.Potter@amd.com for (int i = 0; i < sys->numContexts(); i++) { 206111910SBrandon.Potter@amd.com Process *temp = sys->threadContexts[i]->getProcessPtr(); 206211910SBrandon.Potter@amd.com if (temp->pid() == tid) { 206311910SBrandon.Potter@amd.com tgt_proc = temp; 206411910SBrandon.Potter@amd.com break; 206511910SBrandon.Potter@amd.com } 206611910SBrandon.Potter@amd.com } 206711910SBrandon.Potter@amd.com 206811910SBrandon.Potter@amd.com if (sig != 0 || sig != OS::TGT_SIGABRT) 206911910SBrandon.Potter@amd.com return -EINVAL; 207011910SBrandon.Potter@amd.com 207111910SBrandon.Potter@amd.com if (tgt_proc == nullptr) 207211910SBrandon.Potter@amd.com return -ESRCH; 207311910SBrandon.Potter@amd.com 207411910SBrandon.Potter@amd.com if (tgid != -1 && tgt_proc->tgid() != tgid) 207511910SBrandon.Potter@amd.com return -ESRCH; 207611910SBrandon.Potter@amd.com 207711910SBrandon.Potter@amd.com if (sig == OS::TGT_SIGABRT) 207811910SBrandon.Potter@amd.com exitGroupFunc(desc, 252, process, tc); 207911910SBrandon.Potter@amd.com 208011910SBrandon.Potter@amd.com return 0; 208111910SBrandon.Potter@amd.com} 208211910SBrandon.Potter@amd.com 20832553SN/A 20841354SN/A#endif // __SIM_SYSCALL_EMUL_HH__ 2085