syscall_emul.hh revision 12796
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 218511SN/A/// Target rename() handler. 2191706SN/ASyscallReturn renameFunc(SyscallDesc *desc, int num, 22011851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2211706SN/A 2221706SN/A 2231706SN/A/// Target truncate() handler. 2241706SN/ASyscallReturn truncateFunc(SyscallDesc *desc, int num, 22511851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2261706SN/A 2271706SN/A 2281706SN/A/// Target ftruncate() handler. 2291706SN/ASyscallReturn ftruncateFunc(SyscallDesc *desc, int num, 23011851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2311706SN/A 232511SN/A 2336703Svince@csl.cornell.edu/// Target truncate64() handler. 2346703Svince@csl.cornell.eduSyscallReturn truncate64Func(SyscallDesc *desc, int num, 23511851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2366703Svince@csl.cornell.edu 2376685Stjones1@inf.ed.ac.uk/// Target ftruncate64() handler. 2386685Stjones1@inf.ed.ac.ukSyscallReturn ftruncate64Func(SyscallDesc *desc, int num, 23911851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2406685Stjones1@inf.ed.ac.uk 2416685Stjones1@inf.ed.ac.uk 2425513SMichael.Adler@intel.com/// Target umask() handler. 2435513SMichael.Adler@intel.comSyscallReturn umaskFunc(SyscallDesc *desc, int num, 24411851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2455513SMichael.Adler@intel.com 24611885Sbrandon.potter@amd.com/// Target gettid() handler. 24711885Sbrandon.potter@amd.comSyscallReturn gettidFunc(SyscallDesc *desc, int num, 24811885Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2495513SMichael.Adler@intel.com 2501999SN/A/// Target chown() handler. 2511999SN/ASyscallReturn chownFunc(SyscallDesc *desc, int num, 25211851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2531999SN/A 25411885Sbrandon.potter@amd.com/// Target setpgid() handler. 25511885Sbrandon.potter@amd.comSyscallReturn setpgidFunc(SyscallDesc *desc, int num, 25611885Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2571999SN/A 2581999SN/A/// Target fchown() handler. 2591999SN/ASyscallReturn fchownFunc(SyscallDesc *desc, int num, 26011851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2611999SN/A 2623079Sstever@eecs.umich.edu/// Target dup() handler. 2633079Sstever@eecs.umich.eduSyscallReturn dupFunc(SyscallDesc *desc, int num, 26411851Sbrandon.potter@amd.com Process *process, ThreadContext *tc); 2653079Sstever@eecs.umich.edu 26611908SBrandon.Potter@amd.com/// Target dup2() handler. 26711908SBrandon.Potter@amd.comSyscallReturn dup2Func(SyscallDesc *desc, int num, 26811908SBrandon.Potter@amd.com Process *process, ThreadContext *tc); 26911908SBrandon.Potter@amd.com 27011875Sbrandon.potter@amd.com/// Target fcntl() handler. 2712093SN/ASyscallReturn fcntlFunc(SyscallDesc *desc, int num, 27211851Sbrandon.potter@amd.com Process *process, ThreadContext *tc); 2732093SN/A 2742687Sksewell@umich.edu/// Target fcntl64() handler. 2752687Sksewell@umich.eduSyscallReturn fcntl64Func(SyscallDesc *desc, int num, 27611851Sbrandon.potter@amd.com Process *process, ThreadContext *tc); 2772687Sksewell@umich.edu 2782238SN/A/// Target setuid() handler. 2792238SN/ASyscallReturn setuidFunc(SyscallDesc *desc, int num, 28011851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2812238SN/A 28211908SBrandon.Potter@amd.com/// Target pipe() handler. 28311908SBrandon.Potter@amd.comSyscallReturn pipeFunc(SyscallDesc *desc, int num, 28411908SBrandon.Potter@amd.com Process *p, ThreadContext *tc); 28511908SBrandon.Potter@amd.com 28611908SBrandon.Potter@amd.com/// Internal pipe() handler. 28711908SBrandon.Potter@amd.comSyscallReturn pipeImpl(SyscallDesc *desc, int num, Process *p, 28811908SBrandon.Potter@amd.com ThreadContext *tc, bool pseudoPipe); 28911908SBrandon.Potter@amd.com 2902238SN/A/// Target getpid() handler. 2912238SN/ASyscallReturn getpidFunc(SyscallDesc *desc, int num, 29211851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2932238SN/A 2942238SN/A/// Target getuid() handler. 2952238SN/ASyscallReturn getuidFunc(SyscallDesc *desc, int num, 29611851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2972238SN/A 2982238SN/A/// Target getgid() handler. 2992238SN/ASyscallReturn getgidFunc(SyscallDesc *desc, int num, 30011851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3012238SN/A 3022238SN/A/// Target getppid() handler. 3032238SN/ASyscallReturn getppidFunc(SyscallDesc *desc, int num, 30411851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3052238SN/A 3062238SN/A/// Target geteuid() handler. 3072238SN/ASyscallReturn geteuidFunc(SyscallDesc *desc, int num, 30811851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3092238SN/A 3102238SN/A/// Target getegid() handler. 3112238SN/ASyscallReturn getegidFunc(SyscallDesc *desc, int num, 31211851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3132238SN/A 3149455Smitch.hayenga+gem5@gmail.com/// Target access() handler 3159455Smitch.hayenga+gem5@gmail.comSyscallReturn accessFunc(SyscallDesc *desc, int num, 31611851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 31710203SAli.Saidi@ARM.comSyscallReturn accessFunc(SyscallDesc *desc, int num, 31811851Sbrandon.potter@amd.com Process *p, ThreadContext *tc, 31911851Sbrandon.potter@amd.com int index); 3209455Smitch.hayenga+gem5@gmail.com 3219112Smarc.orr@gmail.com/// Futex system call 32211906SBrandon.Potter@amd.com/// Implemented by Daniel Sanchez 32311906SBrandon.Potter@amd.com/// Used by printf's in multi-threaded apps 3249112Smarc.orr@gmail.comtemplate <class OS> 3259112Smarc.orr@gmail.comSyscallReturn 32611851Sbrandon.potter@amd.comfutexFunc(SyscallDesc *desc, int callnum, Process *process, 3279112Smarc.orr@gmail.com ThreadContext *tc) 3289112Smarc.orr@gmail.com{ 32911911SBrandon.Potter@amd.com using namespace std; 3309112Smarc.orr@gmail.com 33111911SBrandon.Potter@amd.com int index = 0; 33211911SBrandon.Potter@amd.com Addr uaddr = process->getSyscallArg(tc, index); 33311911SBrandon.Potter@amd.com int op = process->getSyscallArg(tc, index); 33411911SBrandon.Potter@amd.com int val = process->getSyscallArg(tc, index); 3359112Smarc.orr@gmail.com 33611911SBrandon.Potter@amd.com /* 33711911SBrandon.Potter@amd.com * Unsupported option that does not affect the correctness of the 33811911SBrandon.Potter@amd.com * application. This is a performance optimization utilized by Linux. 33911911SBrandon.Potter@amd.com */ 3409238Slluc.alvarez@bsc.es op &= ~OS::TGT_FUTEX_PRIVATE_FLAG; 3419112Smarc.orr@gmail.com 34211911SBrandon.Potter@amd.com FutexMap &futex_map = tc->getSystemPtr()->futexMap; 3439112Smarc.orr@gmail.com 34411911SBrandon.Potter@amd.com if (OS::TGT_FUTEX_WAIT == op) { 34511911SBrandon.Potter@amd.com // Ensure futex system call accessed atomically. 34611911SBrandon.Potter@amd.com BufferArg buf(uaddr, sizeof(int)); 34711911SBrandon.Potter@amd.com buf.copyIn(tc->getMemProxy()); 34811911SBrandon.Potter@amd.com int mem_val = *(int*)buf.bufferPtr(); 3499112Smarc.orr@gmail.com 35011911SBrandon.Potter@amd.com /* 35111911SBrandon.Potter@amd.com * The value in memory at uaddr is not equal with the expected val 35211911SBrandon.Potter@amd.com * (a different thread must have changed it before the system call was 35311911SBrandon.Potter@amd.com * invoked). In this case, we need to throw an error. 35411911SBrandon.Potter@amd.com */ 35511911SBrandon.Potter@amd.com if (val != mem_val) 3569112Smarc.orr@gmail.com return -OS::TGT_EWOULDBLOCK; 3579112Smarc.orr@gmail.com 35811911SBrandon.Potter@amd.com futex_map.suspend(uaddr, process->tgid(), tc); 35911911SBrandon.Potter@amd.com 3609112Smarc.orr@gmail.com return 0; 36111911SBrandon.Potter@amd.com } else if (OS::TGT_FUTEX_WAKE == op) { 36211911SBrandon.Potter@amd.com return futex_map.wakeup(uaddr, process->tgid(), val); 3639112Smarc.orr@gmail.com } 3649112Smarc.orr@gmail.com 36511911SBrandon.Potter@amd.com warn("futex: op %d not implemented; ignoring.", op); 36611911SBrandon.Potter@amd.com return -ENOSYS; 3679112Smarc.orr@gmail.com} 3689112Smarc.orr@gmail.com 3692238SN/A 3702238SN/A/// Pseudo Funcs - These functions use a different return convension, 3712238SN/A/// returning a second value in a register other than the normal return register 3722238SN/ASyscallReturn pipePseudoFunc(SyscallDesc *desc, int num, 37311851Sbrandon.potter@amd.com Process *process, ThreadContext *tc); 3742238SN/A 3752238SN/A/// Target getpidPseudo() handler. 3762238SN/ASyscallReturn getpidPseudoFunc(SyscallDesc *desc, int num, 37711851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3782238SN/A 3792238SN/A/// Target getuidPseudo() handler. 3802238SN/ASyscallReturn getuidPseudoFunc(SyscallDesc *desc, int num, 38111851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3822238SN/A 3832238SN/A/// Target getgidPseudo() handler. 3842238SN/ASyscallReturn getgidPseudoFunc(SyscallDesc *desc, int num, 38511851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3862238SN/A 3872238SN/A 3881354SN/A/// A readable name for 1,000,000, for converting microseconds to seconds. 3891354SN/Aconst int one_million = 1000000; 39010796Sbrandon.potter@amd.com/// A readable name for 1,000,000,000, for converting nanoseconds to seconds. 39110796Sbrandon.potter@amd.comconst int one_billion = 1000000000; 3921354SN/A 3931354SN/A/// Approximate seconds since the epoch (1/1/1970). About a billion, 3941354SN/A/// by my reckoning. We want to keep this a constant (not use the 3951354SN/A/// real-world time) to keep simulations repeatable. 3961354SN/Aconst unsigned seconds_since_epoch = 1000000000; 3971354SN/A 3981354SN/A/// Helper function to convert current elapsed time to seconds and 3991354SN/A/// microseconds. 4001354SN/Atemplate <class T1, class T2> 4011354SN/Avoid 40210796Sbrandon.potter@amd.comgetElapsedTimeMicro(T1 &sec, T2 &usec) 4031354SN/A{ 40410796Sbrandon.potter@amd.com uint64_t elapsed_usecs = curTick() / SimClock::Int::us; 4051354SN/A sec = elapsed_usecs / one_million; 4061354SN/A usec = elapsed_usecs % one_million; 4071354SN/A} 4081354SN/A 40910796Sbrandon.potter@amd.com/// Helper function to convert current elapsed time to seconds and 41010796Sbrandon.potter@amd.com/// nanoseconds. 41110796Sbrandon.potter@amd.comtemplate <class T1, class T2> 41210796Sbrandon.potter@amd.comvoid 41310796Sbrandon.potter@amd.comgetElapsedTimeNano(T1 &sec, T2 &nsec) 41410796Sbrandon.potter@amd.com{ 41510796Sbrandon.potter@amd.com uint64_t elapsed_nsecs = curTick() / SimClock::Int::ns; 41610796Sbrandon.potter@amd.com sec = elapsed_nsecs / one_billion; 41710796Sbrandon.potter@amd.com nsec = elapsed_nsecs % one_billion; 41810796Sbrandon.potter@amd.com} 41910796Sbrandon.potter@amd.com 420360SN/A////////////////////////////////////////////////////////////////////// 421360SN/A// 422360SN/A// The following emulation functions are generic, but need to be 423360SN/A// templated to account for differences in types, constants, etc. 424360SN/A// 425360SN/A////////////////////////////////////////////////////////////////////// 426360SN/A 42711759Sbrandon.potter@amd.com typedef struct statfs hst_statfs; 4283113Sgblack@eecs.umich.edu#if NO_STAT64 4293113Sgblack@eecs.umich.edu typedef struct stat hst_stat; 4303113Sgblack@eecs.umich.edu typedef struct stat hst_stat64; 4313113Sgblack@eecs.umich.edu#else 4323113Sgblack@eecs.umich.edu typedef struct stat hst_stat; 4333113Sgblack@eecs.umich.edu typedef struct stat64 hst_stat64; 4343113Sgblack@eecs.umich.edu#endif 4353113Sgblack@eecs.umich.edu 4363113Sgblack@eecs.umich.edu//// Helper function to convert a host stat buffer to a target stat 4373113Sgblack@eecs.umich.edu//// buffer. Also copies the target buffer out to the simulated 4383113Sgblack@eecs.umich.edu//// memory space. Used by stat(), fstat(), and lstat(). 4393113Sgblack@eecs.umich.edu 4403113Sgblack@eecs.umich.edutemplate <typename target_stat, typename host_stat> 44112032Sandreas.sandberg@arm.comvoid 4423113Sgblack@eecs.umich.educonvertStatBuf(target_stat &tgt, host_stat *host, bool fakeTTY = false) 4433113Sgblack@eecs.umich.edu{ 4444189Sgblack@eecs.umich.edu using namespace TheISA; 4454189Sgblack@eecs.umich.edu 4463113Sgblack@eecs.umich.edu if (fakeTTY) 4473113Sgblack@eecs.umich.edu tgt->st_dev = 0xA; 4483113Sgblack@eecs.umich.edu else 4493113Sgblack@eecs.umich.edu tgt->st_dev = host->st_dev; 4508737Skoansin.tan@gmail.com tgt->st_dev = TheISA::htog(tgt->st_dev); 4513113Sgblack@eecs.umich.edu tgt->st_ino = host->st_ino; 4528737Skoansin.tan@gmail.com tgt->st_ino = TheISA::htog(tgt->st_ino); 4533277Sgblack@eecs.umich.edu tgt->st_mode = host->st_mode; 4545515SMichael.Adler@intel.com if (fakeTTY) { 4555515SMichael.Adler@intel.com // Claim to be a character device 4565515SMichael.Adler@intel.com tgt->st_mode &= ~S_IFMT; // Clear S_IFMT 4575515SMichael.Adler@intel.com tgt->st_mode |= S_IFCHR; // Set S_IFCHR 4585515SMichael.Adler@intel.com } 4598737Skoansin.tan@gmail.com tgt->st_mode = TheISA::htog(tgt->st_mode); 4603277Sgblack@eecs.umich.edu tgt->st_nlink = host->st_nlink; 4618737Skoansin.tan@gmail.com tgt->st_nlink = TheISA::htog(tgt->st_nlink); 4623277Sgblack@eecs.umich.edu tgt->st_uid = host->st_uid; 4638737Skoansin.tan@gmail.com tgt->st_uid = TheISA::htog(tgt->st_uid); 4643277Sgblack@eecs.umich.edu tgt->st_gid = host->st_gid; 4658737Skoansin.tan@gmail.com tgt->st_gid = TheISA::htog(tgt->st_gid); 4663113Sgblack@eecs.umich.edu if (fakeTTY) 4673113Sgblack@eecs.umich.edu tgt->st_rdev = 0x880d; 4683113Sgblack@eecs.umich.edu else 4693113Sgblack@eecs.umich.edu tgt->st_rdev = host->st_rdev; 4708737Skoansin.tan@gmail.com tgt->st_rdev = TheISA::htog(tgt->st_rdev); 4713113Sgblack@eecs.umich.edu tgt->st_size = host->st_size; 4728737Skoansin.tan@gmail.com tgt->st_size = TheISA::htog(tgt->st_size); 4733114Sgblack@eecs.umich.edu tgt->st_atimeX = host->st_atime; 4748737Skoansin.tan@gmail.com tgt->st_atimeX = TheISA::htog(tgt->st_atimeX); 4753114Sgblack@eecs.umich.edu tgt->st_mtimeX = host->st_mtime; 4768737Skoansin.tan@gmail.com tgt->st_mtimeX = TheISA::htog(tgt->st_mtimeX); 4773114Sgblack@eecs.umich.edu tgt->st_ctimeX = host->st_ctime; 4788737Skoansin.tan@gmail.com tgt->st_ctimeX = TheISA::htog(tgt->st_ctimeX); 47911906SBrandon.Potter@amd.com // Force the block size to be 8KB. This helps to ensure buffered io works 4804061Sgblack@eecs.umich.edu // consistently across different hosts. 4814061Sgblack@eecs.umich.edu tgt->st_blksize = 0x2000; 4828737Skoansin.tan@gmail.com tgt->st_blksize = TheISA::htog(tgt->st_blksize); 4833113Sgblack@eecs.umich.edu tgt->st_blocks = host->st_blocks; 4848737Skoansin.tan@gmail.com tgt->st_blocks = TheISA::htog(tgt->st_blocks); 4853113Sgblack@eecs.umich.edu} 4863113Sgblack@eecs.umich.edu 4873113Sgblack@eecs.umich.edu// Same for stat64 4883113Sgblack@eecs.umich.edu 4893113Sgblack@eecs.umich.edutemplate <typename target_stat, typename host_stat64> 49012032Sandreas.sandberg@arm.comvoid 4913113Sgblack@eecs.umich.educonvertStat64Buf(target_stat &tgt, host_stat64 *host, bool fakeTTY = false) 4923113Sgblack@eecs.umich.edu{ 4934189Sgblack@eecs.umich.edu using namespace TheISA; 4944189Sgblack@eecs.umich.edu 4953113Sgblack@eecs.umich.edu convertStatBuf<target_stat, host_stat64>(tgt, host, fakeTTY); 4963113Sgblack@eecs.umich.edu#if defined(STAT_HAVE_NSEC) 4973113Sgblack@eecs.umich.edu tgt->st_atime_nsec = host->st_atime_nsec; 4988737Skoansin.tan@gmail.com tgt->st_atime_nsec = TheISA::htog(tgt->st_atime_nsec); 4993113Sgblack@eecs.umich.edu tgt->st_mtime_nsec = host->st_mtime_nsec; 5008737Skoansin.tan@gmail.com tgt->st_mtime_nsec = TheISA::htog(tgt->st_mtime_nsec); 5013113Sgblack@eecs.umich.edu tgt->st_ctime_nsec = host->st_ctime_nsec; 5028737Skoansin.tan@gmail.com tgt->st_ctime_nsec = TheISA::htog(tgt->st_ctime_nsec); 5033113Sgblack@eecs.umich.edu#else 5043113Sgblack@eecs.umich.edu tgt->st_atime_nsec = 0; 5053113Sgblack@eecs.umich.edu tgt->st_mtime_nsec = 0; 5063113Sgblack@eecs.umich.edu tgt->st_ctime_nsec = 0; 5073113Sgblack@eecs.umich.edu#endif 5083113Sgblack@eecs.umich.edu} 5093113Sgblack@eecs.umich.edu 51011906SBrandon.Potter@amd.com// Here are a couple of convenience functions 5113113Sgblack@eecs.umich.edutemplate<class OS> 51212032Sandreas.sandberg@arm.comvoid 5138852Sandreas.hansson@arm.comcopyOutStatBuf(SETranslatingPortProxy &mem, Addr addr, 51411906SBrandon.Potter@amd.com hst_stat *host, bool fakeTTY = false) 5153113Sgblack@eecs.umich.edu{ 5163113Sgblack@eecs.umich.edu typedef TypedBufferArg<typename OS::tgt_stat> tgt_stat_buf; 5173113Sgblack@eecs.umich.edu tgt_stat_buf tgt(addr); 5183113Sgblack@eecs.umich.edu convertStatBuf<tgt_stat_buf, hst_stat>(tgt, host, fakeTTY); 5193113Sgblack@eecs.umich.edu tgt.copyOut(mem); 5203113Sgblack@eecs.umich.edu} 5213113Sgblack@eecs.umich.edu 5223113Sgblack@eecs.umich.edutemplate<class OS> 52312032Sandreas.sandberg@arm.comvoid 5248852Sandreas.hansson@arm.comcopyOutStat64Buf(SETranslatingPortProxy &mem, Addr addr, 52511906SBrandon.Potter@amd.com hst_stat64 *host, bool fakeTTY = false) 5263113Sgblack@eecs.umich.edu{ 5273113Sgblack@eecs.umich.edu typedef TypedBufferArg<typename OS::tgt_stat64> tgt_stat_buf; 5283113Sgblack@eecs.umich.edu tgt_stat_buf tgt(addr); 5296686Stjones1@inf.ed.ac.uk convertStat64Buf<tgt_stat_buf, hst_stat64>(tgt, host, fakeTTY); 5303113Sgblack@eecs.umich.edu tgt.copyOut(mem); 5313113Sgblack@eecs.umich.edu} 5323113Sgblack@eecs.umich.edu 53311759Sbrandon.potter@amd.comtemplate <class OS> 53412032Sandreas.sandberg@arm.comvoid 53511759Sbrandon.potter@amd.comcopyOutStatfsBuf(SETranslatingPortProxy &mem, Addr addr, 53611759Sbrandon.potter@amd.com hst_statfs *host) 53711759Sbrandon.potter@amd.com{ 53811759Sbrandon.potter@amd.com TypedBufferArg<typename OS::tgt_statfs> tgt(addr); 53911759Sbrandon.potter@amd.com 54011812Sbaz21@cam.ac.uk tgt->f_type = TheISA::htog(host->f_type); 54111812Sbaz21@cam.ac.uk#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) 54211812Sbaz21@cam.ac.uk tgt->f_bsize = TheISA::htog(host->f_iosize); 54311759Sbrandon.potter@amd.com#else 54411812Sbaz21@cam.ac.uk tgt->f_bsize = TheISA::htog(host->f_bsize); 54511759Sbrandon.potter@amd.com#endif 54611759Sbrandon.potter@amd.com tgt->f_blocks = TheISA::htog(host->f_blocks); 54711759Sbrandon.potter@amd.com tgt->f_bfree = TheISA::htog(host->f_bfree); 54811759Sbrandon.potter@amd.com tgt->f_bavail = TheISA::htog(host->f_bavail); 54911759Sbrandon.potter@amd.com tgt->f_files = TheISA::htog(host->f_files); 55011759Sbrandon.potter@amd.com tgt->f_ffree = TheISA::htog(host->f_ffree); 55111759Sbrandon.potter@amd.com memcpy(&tgt->f_fsid, &host->f_fsid, sizeof(host->f_fsid)); 55211812Sbaz21@cam.ac.uk#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) 55311812Sbaz21@cam.ac.uk tgt->f_namelen = TheISA::htog(host->f_namemax); 55411812Sbaz21@cam.ac.uk tgt->f_frsize = TheISA::htog(host->f_bsize); 55511812Sbaz21@cam.ac.uk#elif defined(__APPLE__) 55611812Sbaz21@cam.ac.uk tgt->f_namelen = 0; 55711812Sbaz21@cam.ac.uk tgt->f_frsize = 0; 55811812Sbaz21@cam.ac.uk#else 55911759Sbrandon.potter@amd.com tgt->f_namelen = TheISA::htog(host->f_namelen); 56011759Sbrandon.potter@amd.com tgt->f_frsize = TheISA::htog(host->f_frsize); 56111812Sbaz21@cam.ac.uk#endif 56211812Sbaz21@cam.ac.uk#if defined(__linux__) 56311759Sbrandon.potter@amd.com memcpy(&tgt->f_spare, &host->f_spare, sizeof(host->f_spare)); 56411812Sbaz21@cam.ac.uk#else 56511812Sbaz21@cam.ac.uk /* 56611812Sbaz21@cam.ac.uk * The fields are different sizes per OS. Don't bother with 56711812Sbaz21@cam.ac.uk * f_spare or f_reserved on non-Linux for now. 56811812Sbaz21@cam.ac.uk */ 56911812Sbaz21@cam.ac.uk memset(&tgt->f_spare, 0, sizeof(tgt->f_spare)); 57011812Sbaz21@cam.ac.uk#endif 57111759Sbrandon.potter@amd.com 57211759Sbrandon.potter@amd.com tgt.copyOut(mem); 57311759Sbrandon.potter@amd.com} 57411759Sbrandon.potter@amd.com 575378SN/A/// Target ioctl() handler. For the most part, programs call ioctl() 576378SN/A/// only to find out if their stdout is a tty, to determine whether to 5779141Smarc.orr@gmail.com/// do line or block buffering. We always claim that output fds are 5789141Smarc.orr@gmail.com/// not TTYs to provide repeatable results. 579360SN/Atemplate <class OS> 5801450SN/ASyscallReturn 58111856Sbrandon.potter@amd.comioctlFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 582360SN/A{ 5836701Sgblack@eecs.umich.edu int index = 0; 58411856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 58511856Sbrandon.potter@amd.com unsigned req = p->getSyscallArg(tc, index); 586360SN/A 58710930Sbrandon.potter@amd.com DPRINTF(SyscallVerbose, "ioctl(%d, 0x%x, ...)\n", tgt_fd, req); 588360SN/A 58911856Sbrandon.potter@amd.com if (OS::isTtyReq(req)) 59011856Sbrandon.potter@amd.com return -ENOTTY; 59110496Ssteve.reinhardt@amd.com 59211856Sbrandon.potter@amd.com auto dfdp = std::dynamic_pointer_cast<DeviceFDEntry>((*p->fds)[tgt_fd]); 59311856Sbrandon.potter@amd.com if (!dfdp) 5941458SN/A return -EBADF; 595360SN/A 59611856Sbrandon.potter@amd.com /** 59711856Sbrandon.potter@amd.com * If the driver is valid, issue the ioctl through it. Otherwise, 59811856Sbrandon.potter@amd.com * there's an implicit assumption that the device is a TTY type and we 59911856Sbrandon.potter@amd.com * return that we do not have a valid TTY. 60011856Sbrandon.potter@amd.com */ 60111856Sbrandon.potter@amd.com EmulatedDriver *emul_driver = dfdp->getDriver(); 60211856Sbrandon.potter@amd.com if (emul_driver) 60311856Sbrandon.potter@amd.com return emul_driver->ioctl(p, tc, req); 60410496Ssteve.reinhardt@amd.com 60511856Sbrandon.potter@amd.com /** 60611856Sbrandon.potter@amd.com * For lack of a better return code, return ENOTTY. Ideally, we should 60711856Sbrandon.potter@amd.com * return something better here, but at least we issue the warning. 60811856Sbrandon.potter@amd.com */ 60911856Sbrandon.potter@amd.com warn("Unsupported ioctl call (return ENOTTY): ioctl(%d, 0x%x, ...) @ \n", 61010930Sbrandon.potter@amd.com tgt_fd, req, tc->pcState()); 6119141Smarc.orr@gmail.com return -ENOTTY; 612360SN/A} 613360SN/A 614360SN/Atemplate <class OS> 61511907SBrandon.Potter@amd.comSyscallReturn 61611907SBrandon.Potter@amd.comopenImpl(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc, 61711907SBrandon.Potter@amd.com bool isopenat) 618360SN/A{ 61911907SBrandon.Potter@amd.com int index = 0; 62011907SBrandon.Potter@amd.com int tgt_dirfd = -1; 62111907SBrandon.Potter@amd.com 62211907SBrandon.Potter@amd.com /** 62311907SBrandon.Potter@amd.com * If using the openat variant, read in the target directory file 62411907SBrandon.Potter@amd.com * descriptor from the simulated process. 62511907SBrandon.Potter@amd.com */ 62611907SBrandon.Potter@amd.com if (isopenat) 62711907SBrandon.Potter@amd.com tgt_dirfd = p->getSyscallArg(tc, index); 62811907SBrandon.Potter@amd.com 62911907SBrandon.Potter@amd.com /** 63011907SBrandon.Potter@amd.com * Retrieve the simulated process' memory proxy and then read in the path 63111907SBrandon.Potter@amd.com * string from that memory space into the host's working memory space. 63211907SBrandon.Potter@amd.com */ 633360SN/A std::string path; 63411907SBrandon.Potter@amd.com if (!tc->getMemProxy().tryReadString(path, p->getSyscallArg(tc, index))) 6351458SN/A return -EFAULT; 636360SN/A 63711907SBrandon.Potter@amd.com#ifdef __CYGWIN32__ 63811907SBrandon.Potter@amd.com int host_flags = O_BINARY; 63911907SBrandon.Potter@amd.com#else 64011907SBrandon.Potter@amd.com int host_flags = 0; 64111907SBrandon.Potter@amd.com#endif 64211907SBrandon.Potter@amd.com /** 64311907SBrandon.Potter@amd.com * Translate target flags into host flags. Flags exist which are not 64411907SBrandon.Potter@amd.com * ported between architectures which can cause check failures. 64511907SBrandon.Potter@amd.com */ 64611907SBrandon.Potter@amd.com int tgt_flags = p->getSyscallArg(tc, index); 647360SN/A for (int i = 0; i < OS::NUM_OPEN_FLAGS; i++) { 64811907SBrandon.Potter@amd.com if (tgt_flags & OS::openFlagTable[i].tgtFlag) { 64911907SBrandon.Potter@amd.com tgt_flags &= ~OS::openFlagTable[i].tgtFlag; 65011907SBrandon.Potter@amd.com host_flags |= OS::openFlagTable[i].hostFlag; 651360SN/A } 652360SN/A } 65311907SBrandon.Potter@amd.com if (tgt_flags) { 65411907SBrandon.Potter@amd.com warn("open%s: cannot decode flags 0x%x", 65511907SBrandon.Potter@amd.com isopenat ? "at" : "", tgt_flags); 65611907SBrandon.Potter@amd.com } 657360SN/A#ifdef __CYGWIN32__ 65811907SBrandon.Potter@amd.com host_flags |= O_BINARY; 659360SN/A#endif 660360SN/A 66111907SBrandon.Potter@amd.com int mode = p->getSyscallArg(tc, index); 6623669Sbinkertn@umich.edu 66311907SBrandon.Potter@amd.com /** 66411907SBrandon.Potter@amd.com * If the simulated process called open or openat with AT_FDCWD specified, 66511907SBrandon.Potter@amd.com * take the current working directory value which was passed into the 66611907SBrandon.Potter@amd.com * process class as a Python parameter and append the current path to 66711907SBrandon.Potter@amd.com * create a full path. 66811907SBrandon.Potter@amd.com * Otherwise, openat with a valid target directory file descriptor has 66911907SBrandon.Potter@amd.com * been called. If the path option, which was passed in as a parameter, 67011907SBrandon.Potter@amd.com * is not absolute, retrieve the directory file descriptor's path and 67111907SBrandon.Potter@amd.com * prepend it to the path passed in as a parameter. 67211907SBrandon.Potter@amd.com * In every case, we should have a full path (which is relevant to the 67311907SBrandon.Potter@amd.com * host) to work with after this block has been passed. 67411907SBrandon.Potter@amd.com */ 67511907SBrandon.Potter@amd.com if (!isopenat || (isopenat && tgt_dirfd == OS::TGT_AT_FDCWD)) { 67611907SBrandon.Potter@amd.com path = p->fullPath(path); 67711907SBrandon.Potter@amd.com } else if (!startswith(path, "/")) { 67811907SBrandon.Potter@amd.com std::shared_ptr<FDEntry> fdep = ((*p->fds)[tgt_dirfd]); 67911907SBrandon.Potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(fdep); 68011907SBrandon.Potter@amd.com if (!ffdp) 68111907SBrandon.Potter@amd.com return -EBADF; 68211907SBrandon.Potter@amd.com path.insert(0, ffdp->getFileName()); 68311907SBrandon.Potter@amd.com } 6841706SN/A 68511907SBrandon.Potter@amd.com /** 68611907SBrandon.Potter@amd.com * Since this is an emulated environment, we create pseudo file 68711907SBrandon.Potter@amd.com * descriptors for device requests that have been registered with 68811907SBrandon.Potter@amd.com * the process class through Python; this allows us to create a file 68911907SBrandon.Potter@amd.com * descriptor for subsequent ioctl or mmap calls. 69011907SBrandon.Potter@amd.com */ 69110496Ssteve.reinhardt@amd.com if (startswith(path, "/dev/")) { 69210496Ssteve.reinhardt@amd.com std::string filename = path.substr(strlen("/dev/")); 69311907SBrandon.Potter@amd.com EmulatedDriver *drv = p->findDriver(filename); 69411907SBrandon.Potter@amd.com if (drv) { 69511907SBrandon.Potter@amd.com DPRINTF_SYSCALL(Verbose, "open%s: passing call to " 69611907SBrandon.Potter@amd.com "driver open with path[%s]\n", 69711907SBrandon.Potter@amd.com isopenat ? "at" : "", path.c_str()); 69811907SBrandon.Potter@amd.com return drv->open(p, tc, mode, host_flags); 69910496Ssteve.reinhardt@amd.com } 70011907SBrandon.Potter@amd.com /** 70111907SBrandon.Potter@amd.com * Fall through here for pass through to host devices, such 70211907SBrandon.Potter@amd.com * as /dev/zero 70311907SBrandon.Potter@amd.com */ 70410496Ssteve.reinhardt@amd.com } 70510496Ssteve.reinhardt@amd.com 70611907SBrandon.Potter@amd.com /** 70711907SBrandon.Potter@amd.com * Some special paths and files cannot be called on the host and need 70811907SBrandon.Potter@amd.com * to be handled as special cases inside the simulator. 70911907SBrandon.Potter@amd.com * If the full path that was created above does not match any of the 71011907SBrandon.Potter@amd.com * special cases, pass it through to the open call on the host to let 71111907SBrandon.Potter@amd.com * the host open the file on our behalf. 71211907SBrandon.Potter@amd.com * If the host cannot open the file, return the host's error code back 71311907SBrandon.Potter@amd.com * through the system call to the simulated process. 71411907SBrandon.Potter@amd.com */ 71511907SBrandon.Potter@amd.com int sim_fd = -1; 71611907SBrandon.Potter@amd.com std::vector<std::string> special_paths = 71711907SBrandon.Potter@amd.com { "/proc/", "/system/", "/sys/", "/platform/", "/etc/passwd" }; 71811907SBrandon.Potter@amd.com for (auto entry : special_paths) { 71911907SBrandon.Potter@amd.com if (startswith(path, entry)) 72011907SBrandon.Potter@amd.com sim_fd = OS::openSpecialFile(path, p, tc); 72111907SBrandon.Potter@amd.com } 72211907SBrandon.Potter@amd.com if (sim_fd == -1) { 72311907SBrandon.Potter@amd.com sim_fd = open(path.c_str(), host_flags, mode); 72411907SBrandon.Potter@amd.com } 72511907SBrandon.Potter@amd.com if (sim_fd == -1) { 72611907SBrandon.Potter@amd.com int local = -errno; 72711907SBrandon.Potter@amd.com DPRINTF_SYSCALL(Verbose, "open%s: failed -> path:%s\n", 72811907SBrandon.Potter@amd.com isopenat ? "at" : "", path.c_str()); 72911907SBrandon.Potter@amd.com return local; 73011907SBrandon.Potter@amd.com } 731360SN/A 73211907SBrandon.Potter@amd.com /** 73311907SBrandon.Potter@amd.com * The file was opened successfully and needs to be recorded in the 73411907SBrandon.Potter@amd.com * process' file descriptor array so that it can be retrieved later. 73511907SBrandon.Potter@amd.com * The target file descriptor that is chosen will be the lowest unused 73611907SBrandon.Potter@amd.com * file descriptor. 73711907SBrandon.Potter@amd.com * Return the indirect target file descriptor back to the simulated 73811907SBrandon.Potter@amd.com * process to act as a handle for the opened file. 73911907SBrandon.Potter@amd.com */ 74011907SBrandon.Potter@amd.com auto ffdp = std::make_shared<FileFDEntry>(sim_fd, host_flags, path, 0); 74111907SBrandon.Potter@amd.com int tgt_fd = p->fds->allocFD(ffdp); 74211907SBrandon.Potter@amd.com DPRINTF_SYSCALL(Verbose, "open%s: sim_fd[%d], target_fd[%d] -> path:%s\n", 74311907SBrandon.Potter@amd.com isopenat ? "at" : "", sim_fd, tgt_fd, path.c_str()); 74411907SBrandon.Potter@amd.com return tgt_fd; 745360SN/A} 746360SN/A 74710027SChris.Adeniyi-Jones@arm.com/// Target open() handler. 74810027SChris.Adeniyi-Jones@arm.comtemplate <class OS> 74910027SChris.Adeniyi-Jones@arm.comSyscallReturn 75011851Sbrandon.potter@amd.comopenFunc(SyscallDesc *desc, int callnum, Process *process, 75110027SChris.Adeniyi-Jones@arm.com ThreadContext *tc) 75210027SChris.Adeniyi-Jones@arm.com{ 75311907SBrandon.Potter@amd.com return openImpl<OS>(desc, callnum, process, tc, false); 75410027SChris.Adeniyi-Jones@arm.com} 75510027SChris.Adeniyi-Jones@arm.com 75610027SChris.Adeniyi-Jones@arm.com/// Target openat() handler. 75710027SChris.Adeniyi-Jones@arm.comtemplate <class OS> 75810027SChris.Adeniyi-Jones@arm.comSyscallReturn 75911851Sbrandon.potter@amd.comopenatFunc(SyscallDesc *desc, int callnum, Process *process, 76011851Sbrandon.potter@amd.com ThreadContext *tc) 76110027SChris.Adeniyi-Jones@arm.com{ 76211907SBrandon.Potter@amd.com return openImpl<OS>(desc, callnum, process, tc, true); 76310027SChris.Adeniyi-Jones@arm.com} 76410027SChris.Adeniyi-Jones@arm.com 76510633Smichaelupton@gmail.com/// Target unlinkat() handler. 76610633Smichaelupton@gmail.comtemplate <class OS> 76710633Smichaelupton@gmail.comSyscallReturn 76811851Sbrandon.potter@amd.comunlinkatFunc(SyscallDesc *desc, int callnum, Process *process, 76910633Smichaelupton@gmail.com ThreadContext *tc) 77010633Smichaelupton@gmail.com{ 77110633Smichaelupton@gmail.com int index = 0; 77210633Smichaelupton@gmail.com int dirfd = process->getSyscallArg(tc, index); 77310633Smichaelupton@gmail.com if (dirfd != OS::TGT_AT_FDCWD) 77410633Smichaelupton@gmail.com warn("unlinkat: first argument not AT_FDCWD; unlikely to work"); 77510633Smichaelupton@gmail.com 77610633Smichaelupton@gmail.com return unlinkHelper(desc, callnum, process, tc, 1); 77710633Smichaelupton@gmail.com} 77810633Smichaelupton@gmail.com 77910203SAli.Saidi@ARM.com/// Target facessat() handler 78010203SAli.Saidi@ARM.comtemplate <class OS> 78110203SAli.Saidi@ARM.comSyscallReturn 78211851Sbrandon.potter@amd.comfaccessatFunc(SyscallDesc *desc, int callnum, Process *process, 78311851Sbrandon.potter@amd.com ThreadContext *tc) 78410203SAli.Saidi@ARM.com{ 78510203SAli.Saidi@ARM.com int index = 0; 78610203SAli.Saidi@ARM.com int dirfd = process->getSyscallArg(tc, index); 78710203SAli.Saidi@ARM.com if (dirfd != OS::TGT_AT_FDCWD) 78810203SAli.Saidi@ARM.com warn("faccessat: first argument not AT_FDCWD; unlikely to work"); 78910203SAli.Saidi@ARM.com return accessFunc(desc, callnum, process, tc, 1); 79010203SAli.Saidi@ARM.com} 79110203SAli.Saidi@ARM.com 79210203SAli.Saidi@ARM.com/// Target readlinkat() handler 79310203SAli.Saidi@ARM.comtemplate <class OS> 79410203SAli.Saidi@ARM.comSyscallReturn 79511851Sbrandon.potter@amd.comreadlinkatFunc(SyscallDesc *desc, int callnum, Process *process, 79611851Sbrandon.potter@amd.com ThreadContext *tc) 79710203SAli.Saidi@ARM.com{ 79810203SAli.Saidi@ARM.com int index = 0; 79910203SAli.Saidi@ARM.com int dirfd = process->getSyscallArg(tc, index); 80010203SAli.Saidi@ARM.com if (dirfd != OS::TGT_AT_FDCWD) 80110203SAli.Saidi@ARM.com warn("openat: first argument not AT_FDCWD; unlikely to work"); 80210203SAli.Saidi@ARM.com return readlinkFunc(desc, callnum, process, tc, 1); 80310203SAli.Saidi@ARM.com} 80410203SAli.Saidi@ARM.com 80510850SGiacomo.Gabrielli@arm.com/// Target renameat() handler. 80610850SGiacomo.Gabrielli@arm.comtemplate <class OS> 80710850SGiacomo.Gabrielli@arm.comSyscallReturn 80811851Sbrandon.potter@amd.comrenameatFunc(SyscallDesc *desc, int callnum, Process *process, 80910850SGiacomo.Gabrielli@arm.com ThreadContext *tc) 81010850SGiacomo.Gabrielli@arm.com{ 81110850SGiacomo.Gabrielli@arm.com int index = 0; 81210850SGiacomo.Gabrielli@arm.com 81310850SGiacomo.Gabrielli@arm.com int olddirfd = process->getSyscallArg(tc, index); 81410850SGiacomo.Gabrielli@arm.com if (olddirfd != OS::TGT_AT_FDCWD) 81510850SGiacomo.Gabrielli@arm.com warn("renameat: first argument not AT_FDCWD; unlikely to work"); 81610850SGiacomo.Gabrielli@arm.com 81710850SGiacomo.Gabrielli@arm.com std::string old_name; 81810850SGiacomo.Gabrielli@arm.com 81910850SGiacomo.Gabrielli@arm.com if (!tc->getMemProxy().tryReadString(old_name, 82010850SGiacomo.Gabrielli@arm.com process->getSyscallArg(tc, index))) 82110850SGiacomo.Gabrielli@arm.com return -EFAULT; 82210850SGiacomo.Gabrielli@arm.com 82310850SGiacomo.Gabrielli@arm.com int newdirfd = process->getSyscallArg(tc, index); 82410850SGiacomo.Gabrielli@arm.com if (newdirfd != OS::TGT_AT_FDCWD) 82510850SGiacomo.Gabrielli@arm.com warn("renameat: third argument not AT_FDCWD; unlikely to work"); 82610850SGiacomo.Gabrielli@arm.com 82710850SGiacomo.Gabrielli@arm.com std::string new_name; 82810850SGiacomo.Gabrielli@arm.com 82910850SGiacomo.Gabrielli@arm.com if (!tc->getMemProxy().tryReadString(new_name, 83010850SGiacomo.Gabrielli@arm.com process->getSyscallArg(tc, index))) 83110850SGiacomo.Gabrielli@arm.com return -EFAULT; 83210850SGiacomo.Gabrielli@arm.com 83310850SGiacomo.Gabrielli@arm.com // Adjust path for current working directory 83410850SGiacomo.Gabrielli@arm.com old_name = process->fullPath(old_name); 83510850SGiacomo.Gabrielli@arm.com new_name = process->fullPath(new_name); 83610850SGiacomo.Gabrielli@arm.com 83710850SGiacomo.Gabrielli@arm.com int result = rename(old_name.c_str(), new_name.c_str()); 83810850SGiacomo.Gabrielli@arm.com return (result == -1) ? -errno : result; 83910850SGiacomo.Gabrielli@arm.com} 84010850SGiacomo.Gabrielli@arm.com 8416640Svince@csl.cornell.edu/// Target sysinfo() handler. 8426640Svince@csl.cornell.edutemplate <class OS> 8436640Svince@csl.cornell.eduSyscallReturn 84411851Sbrandon.potter@amd.comsysinfoFunc(SyscallDesc *desc, int callnum, Process *process, 84511851Sbrandon.potter@amd.com ThreadContext *tc) 8466640Svince@csl.cornell.edu{ 8476640Svince@csl.cornell.edu 8486701Sgblack@eecs.umich.edu int index = 0; 8496701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::tgt_sysinfo> 85010793Sbrandon.potter@amd.com sysinfo(process->getSyscallArg(tc, index)); 8516640Svince@csl.cornell.edu 85211758Sbrandon.potter@amd.com sysinfo->uptime = seconds_since_epoch; 85311758Sbrandon.potter@amd.com sysinfo->totalram = process->system->memSize(); 85411758Sbrandon.potter@amd.com sysinfo->mem_unit = 1; 8556640Svince@csl.cornell.edu 8568706Sandreas.hansson@arm.com sysinfo.copyOut(tc->getMemProxy()); 8576640Svince@csl.cornell.edu 8586701Sgblack@eecs.umich.edu return 0; 8596640Svince@csl.cornell.edu} 860360SN/A 8611999SN/A/// Target chmod() handler. 8621999SN/Atemplate <class OS> 8631999SN/ASyscallReturn 86411851Sbrandon.potter@amd.comchmodFunc(SyscallDesc *desc, int callnum, Process *process, 8652680Sktlim@umich.edu ThreadContext *tc) 8661999SN/A{ 8671999SN/A std::string path; 8681999SN/A 8696701Sgblack@eecs.umich.edu int index = 0; 8708852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 8716701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 8721999SN/A return -EFAULT; 8736701Sgblack@eecs.umich.edu } 8741999SN/A 8756701Sgblack@eecs.umich.edu uint32_t mode = process->getSyscallArg(tc, index); 8761999SN/A mode_t hostMode = 0; 8771999SN/A 8781999SN/A // XXX translate mode flags via OS::something??? 8791999SN/A hostMode = mode; 8801999SN/A 8813669Sbinkertn@umich.edu // Adjust path for current working directory 8823669Sbinkertn@umich.edu path = process->fullPath(path); 8833669Sbinkertn@umich.edu 8841999SN/A // do the chmod 8851999SN/A int result = chmod(path.c_str(), hostMode); 8861999SN/A if (result < 0) 8872218SN/A return -errno; 8881999SN/A 8891999SN/A return 0; 8901999SN/A} 8911999SN/A 8921999SN/A 8931999SN/A/// Target fchmod() handler. 8941999SN/Atemplate <class OS> 8951999SN/ASyscallReturn 89611856Sbrandon.potter@amd.comfchmodFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 8971999SN/A{ 8986701Sgblack@eecs.umich.edu int index = 0; 89911856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 90011856Sbrandon.potter@amd.com uint32_t mode = p->getSyscallArg(tc, index); 90110931Sbrandon.potter@amd.com 90211856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 90311856Sbrandon.potter@amd.com if (!ffdp) 9041999SN/A return -EBADF; 90511856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 9061999SN/A 90711856Sbrandon.potter@amd.com mode_t hostMode = mode; 9081999SN/A 90911856Sbrandon.potter@amd.com int result = fchmod(sim_fd, hostMode); 9101999SN/A 91111856Sbrandon.potter@amd.com return (result < 0) ? -errno : 0; 9121999SN/A} 9131999SN/A 9145877Shsul@eecs.umich.edu/// Target mremap() handler. 9155877Shsul@eecs.umich.edutemplate <class OS> 9165877Shsul@eecs.umich.eduSyscallReturn 91711851Sbrandon.potter@amd.commremapFunc(SyscallDesc *desc, int callnum, Process *process, ThreadContext *tc) 9185877Shsul@eecs.umich.edu{ 9196701Sgblack@eecs.umich.edu int index = 0; 9206701Sgblack@eecs.umich.edu Addr start = process->getSyscallArg(tc, index); 9216701Sgblack@eecs.umich.edu uint64_t old_length = process->getSyscallArg(tc, index); 9226701Sgblack@eecs.umich.edu uint64_t new_length = process->getSyscallArg(tc, index); 9236701Sgblack@eecs.umich.edu uint64_t flags = process->getSyscallArg(tc, index); 92410027SChris.Adeniyi-Jones@arm.com uint64_t provided_address = 0; 92510027SChris.Adeniyi-Jones@arm.com bool use_provided_address = flags & OS::TGT_MREMAP_FIXED; 92610027SChris.Adeniyi-Jones@arm.com 92710027SChris.Adeniyi-Jones@arm.com if (use_provided_address) 92810027SChris.Adeniyi-Jones@arm.com provided_address = process->getSyscallArg(tc, index); 9295877Shsul@eecs.umich.edu 93010318Sandreas.hansson@arm.com if ((start % TheISA::PageBytes != 0) || 93110318Sandreas.hansson@arm.com (provided_address % TheISA::PageBytes != 0)) { 9325877Shsul@eecs.umich.edu warn("mremap failing: arguments not page aligned"); 9335877Shsul@eecs.umich.edu return -EINVAL; 9345877Shsul@eecs.umich.edu } 9355877Shsul@eecs.umich.edu 93610486Stjablin@gmail.com new_length = roundUp(new_length, TheISA::PageBytes); 93710486Stjablin@gmail.com 9385877Shsul@eecs.umich.edu if (new_length > old_length) { 93911905SBrandon.Potter@amd.com std::shared_ptr<MemState> mem_state = process->memState; 94011905SBrandon.Potter@amd.com Addr mmap_end = mem_state->getMmapEnd(); 94111905SBrandon.Potter@amd.com 94211905SBrandon.Potter@amd.com if ((start + old_length) == mmap_end && 94310027SChris.Adeniyi-Jones@arm.com (!use_provided_address || provided_address == start)) { 94412206Srico.amslinger@informatik.uni-augsburg.de // This case cannot occur when growing downward, as 94512206Srico.amslinger@informatik.uni-augsburg.de // start is greater than or equal to mmap_end. 9465877Shsul@eecs.umich.edu uint64_t diff = new_length - old_length; 94711905SBrandon.Potter@amd.com process->allocateMem(mmap_end, diff); 94811905SBrandon.Potter@amd.com mem_state->setMmapEnd(mmap_end + diff); 9495877Shsul@eecs.umich.edu return start; 9505877Shsul@eecs.umich.edu } else { 95110027SChris.Adeniyi-Jones@arm.com if (!use_provided_address && !(flags & OS::TGT_MREMAP_MAYMOVE)) { 9525877Shsul@eecs.umich.edu warn("can't remap here and MREMAP_MAYMOVE flag not set\n"); 9535877Shsul@eecs.umich.edu return -ENOMEM; 9545877Shsul@eecs.umich.edu } else { 95512206Srico.amslinger@informatik.uni-augsburg.de uint64_t new_start = provided_address; 95612206Srico.amslinger@informatik.uni-augsburg.de if (!use_provided_address) { 95712206Srico.amslinger@informatik.uni-augsburg.de new_start = process->mmapGrowsDown() ? 95812206Srico.amslinger@informatik.uni-augsburg.de mmap_end - new_length : mmap_end; 95912206Srico.amslinger@informatik.uni-augsburg.de mmap_end = process->mmapGrowsDown() ? 96012206Srico.amslinger@informatik.uni-augsburg.de new_start : mmap_end + new_length; 96112206Srico.amslinger@informatik.uni-augsburg.de mem_state->setMmapEnd(mmap_end); 96212206Srico.amslinger@informatik.uni-augsburg.de } 96312206Srico.amslinger@informatik.uni-augsburg.de 96410027SChris.Adeniyi-Jones@arm.com process->pTable->remap(start, old_length, new_start); 96510027SChris.Adeniyi-Jones@arm.com warn("mremapping to new vaddr %08p-%08p, adding %d\n", 96610027SChris.Adeniyi-Jones@arm.com new_start, new_start + new_length, 96710027SChris.Adeniyi-Jones@arm.com new_length - old_length); 9685877Shsul@eecs.umich.edu // add on the remaining unallocated pages 96910027SChris.Adeniyi-Jones@arm.com process->allocateMem(new_start + old_length, 97010027SChris.Adeniyi-Jones@arm.com new_length - old_length, 97110027SChris.Adeniyi-Jones@arm.com use_provided_address /* clobber */); 97210027SChris.Adeniyi-Jones@arm.com if (use_provided_address && 97312206Srico.amslinger@informatik.uni-augsburg.de ((new_start + new_length > mem_state->getMmapEnd() && 97412206Srico.amslinger@informatik.uni-augsburg.de !process->mmapGrowsDown()) || 97512206Srico.amslinger@informatik.uni-augsburg.de (new_start < mem_state->getMmapEnd() && 97612206Srico.amslinger@informatik.uni-augsburg.de process->mmapGrowsDown()))) { 97710027SChris.Adeniyi-Jones@arm.com // something fishy going on here, at least notify the user 97810027SChris.Adeniyi-Jones@arm.com // @todo: increase mmap_end? 97910027SChris.Adeniyi-Jones@arm.com warn("mmap region limit exceeded with MREMAP_FIXED\n"); 98010027SChris.Adeniyi-Jones@arm.com } 98110027SChris.Adeniyi-Jones@arm.com warn("returning %08p as start\n", new_start); 98210027SChris.Adeniyi-Jones@arm.com return new_start; 9835877Shsul@eecs.umich.edu } 9845877Shsul@eecs.umich.edu } 9855877Shsul@eecs.umich.edu } else { 98610027SChris.Adeniyi-Jones@arm.com if (use_provided_address && provided_address != start) 98710027SChris.Adeniyi-Jones@arm.com process->pTable->remap(start, new_length, provided_address); 9888601Ssteve.reinhardt@amd.com process->pTable->unmap(start + new_length, old_length - new_length); 98910027SChris.Adeniyi-Jones@arm.com return use_provided_address ? provided_address : start; 9905877Shsul@eecs.umich.edu } 9915877Shsul@eecs.umich.edu} 9921999SN/A 993378SN/A/// Target stat() handler. 994360SN/Atemplate <class OS> 9951450SN/ASyscallReturn 99611851Sbrandon.potter@amd.comstatFunc(SyscallDesc *desc, int callnum, Process *process, 9972680Sktlim@umich.edu ThreadContext *tc) 998360SN/A{ 999360SN/A std::string path; 1000360SN/A 10016701Sgblack@eecs.umich.edu int index = 0; 10028852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 10036701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 10046701Sgblack@eecs.umich.edu return -EFAULT; 10056701Sgblack@eecs.umich.edu } 10066701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 1007360SN/A 10083669Sbinkertn@umich.edu // Adjust path for current working directory 10093669Sbinkertn@umich.edu path = process->fullPath(path); 10103669Sbinkertn@umich.edu 1011360SN/A struct stat hostBuf; 1012360SN/A int result = stat(path.c_str(), &hostBuf); 1013360SN/A 1014360SN/A if (result < 0) 10152218SN/A return -errno; 1016360SN/A 10178706Sandreas.hansson@arm.com copyOutStatBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 1018360SN/A 10191458SN/A return 0; 1020360SN/A} 1021360SN/A 1022360SN/A 10235074Ssaidi@eecs.umich.edu/// Target stat64() handler. 10245074Ssaidi@eecs.umich.edutemplate <class OS> 10255074Ssaidi@eecs.umich.eduSyscallReturn 102611851Sbrandon.potter@amd.comstat64Func(SyscallDesc *desc, int callnum, Process *process, 10275074Ssaidi@eecs.umich.edu ThreadContext *tc) 10285074Ssaidi@eecs.umich.edu{ 10295074Ssaidi@eecs.umich.edu std::string path; 10305074Ssaidi@eecs.umich.edu 10316701Sgblack@eecs.umich.edu int index = 0; 10328852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 10336701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) 10345074Ssaidi@eecs.umich.edu return -EFAULT; 10356701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 10365074Ssaidi@eecs.umich.edu 10375074Ssaidi@eecs.umich.edu // Adjust path for current working directory 10385074Ssaidi@eecs.umich.edu path = process->fullPath(path); 10395074Ssaidi@eecs.umich.edu 10405208Ssaidi@eecs.umich.edu#if NO_STAT64 10415208Ssaidi@eecs.umich.edu struct stat hostBuf; 10425208Ssaidi@eecs.umich.edu int result = stat(path.c_str(), &hostBuf); 10435208Ssaidi@eecs.umich.edu#else 10445074Ssaidi@eecs.umich.edu struct stat64 hostBuf; 10455074Ssaidi@eecs.umich.edu int result = stat64(path.c_str(), &hostBuf); 10465208Ssaidi@eecs.umich.edu#endif 10475074Ssaidi@eecs.umich.edu 10485074Ssaidi@eecs.umich.edu if (result < 0) 10495074Ssaidi@eecs.umich.edu return -errno; 10505074Ssaidi@eecs.umich.edu 10518706Sandreas.hansson@arm.com copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 10525074Ssaidi@eecs.umich.edu 10535074Ssaidi@eecs.umich.edu return 0; 10545074Ssaidi@eecs.umich.edu} 10555074Ssaidi@eecs.umich.edu 10565074Ssaidi@eecs.umich.edu 105710027SChris.Adeniyi-Jones@arm.com/// Target fstatat64() handler. 105810027SChris.Adeniyi-Jones@arm.comtemplate <class OS> 105910027SChris.Adeniyi-Jones@arm.comSyscallReturn 106011851Sbrandon.potter@amd.comfstatat64Func(SyscallDesc *desc, int callnum, Process *process, 106110027SChris.Adeniyi-Jones@arm.com ThreadContext *tc) 106210027SChris.Adeniyi-Jones@arm.com{ 106310027SChris.Adeniyi-Jones@arm.com int index = 0; 106410027SChris.Adeniyi-Jones@arm.com int dirfd = process->getSyscallArg(tc, index); 106510027SChris.Adeniyi-Jones@arm.com if (dirfd != OS::TGT_AT_FDCWD) 106610793Sbrandon.potter@amd.com warn("fstatat64: first argument not AT_FDCWD; unlikely to work"); 106710027SChris.Adeniyi-Jones@arm.com 106810027SChris.Adeniyi-Jones@arm.com std::string path; 106910027SChris.Adeniyi-Jones@arm.com if (!tc->getMemProxy().tryReadString(path, 107010027SChris.Adeniyi-Jones@arm.com process->getSyscallArg(tc, index))) 107110027SChris.Adeniyi-Jones@arm.com return -EFAULT; 107210027SChris.Adeniyi-Jones@arm.com Addr bufPtr = process->getSyscallArg(tc, index); 107310027SChris.Adeniyi-Jones@arm.com 107410027SChris.Adeniyi-Jones@arm.com // Adjust path for current working directory 107510027SChris.Adeniyi-Jones@arm.com path = process->fullPath(path); 107610027SChris.Adeniyi-Jones@arm.com 107710027SChris.Adeniyi-Jones@arm.com#if NO_STAT64 107810027SChris.Adeniyi-Jones@arm.com struct stat hostBuf; 107910027SChris.Adeniyi-Jones@arm.com int result = stat(path.c_str(), &hostBuf); 108010027SChris.Adeniyi-Jones@arm.com#else 108110027SChris.Adeniyi-Jones@arm.com struct stat64 hostBuf; 108210027SChris.Adeniyi-Jones@arm.com int result = stat64(path.c_str(), &hostBuf); 108310027SChris.Adeniyi-Jones@arm.com#endif 108410027SChris.Adeniyi-Jones@arm.com 108510027SChris.Adeniyi-Jones@arm.com if (result < 0) 108610027SChris.Adeniyi-Jones@arm.com return -errno; 108710027SChris.Adeniyi-Jones@arm.com 108810027SChris.Adeniyi-Jones@arm.com copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 108910027SChris.Adeniyi-Jones@arm.com 109010027SChris.Adeniyi-Jones@arm.com return 0; 109110027SChris.Adeniyi-Jones@arm.com} 109210027SChris.Adeniyi-Jones@arm.com 109310027SChris.Adeniyi-Jones@arm.com 10941999SN/A/// Target fstat64() handler. 10951999SN/Atemplate <class OS> 10961999SN/ASyscallReturn 109711856Sbrandon.potter@amd.comfstat64Func(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 10981999SN/A{ 10996701Sgblack@eecs.umich.edu int index = 0; 110011856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 110111856Sbrandon.potter@amd.com Addr bufPtr = p->getSyscallArg(tc, index); 110210931Sbrandon.potter@amd.com 110311856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 110411856Sbrandon.potter@amd.com if (!ffdp) 11051999SN/A return -EBADF; 110611856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 11071999SN/A 11082764Sstever@eecs.umich.edu#if NO_STAT64 11092064SN/A struct stat hostBuf; 111010931Sbrandon.potter@amd.com int result = fstat(sim_fd, &hostBuf); 11112064SN/A#else 11122064SN/A struct stat64 hostBuf; 111310931Sbrandon.potter@amd.com int result = fstat64(sim_fd, &hostBuf); 11142064SN/A#endif 11151999SN/A 11161999SN/A if (result < 0) 11172218SN/A return -errno; 11181999SN/A 111910931Sbrandon.potter@amd.com copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf, (sim_fd == 1)); 11201999SN/A 11211999SN/A return 0; 11221999SN/A} 11231999SN/A 11241999SN/A 1125378SN/A/// Target lstat() handler. 1126360SN/Atemplate <class OS> 11271450SN/ASyscallReturn 112811851Sbrandon.potter@amd.comlstatFunc(SyscallDesc *desc, int callnum, Process *process, 11292680Sktlim@umich.edu ThreadContext *tc) 1130360SN/A{ 1131360SN/A std::string path; 1132360SN/A 11336701Sgblack@eecs.umich.edu int index = 0; 11348852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 11356701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 11366701Sgblack@eecs.umich.edu return -EFAULT; 11376701Sgblack@eecs.umich.edu } 11386701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 1139360SN/A 11403669Sbinkertn@umich.edu // Adjust path for current working directory 11413669Sbinkertn@umich.edu path = process->fullPath(path); 11423669Sbinkertn@umich.edu 1143360SN/A struct stat hostBuf; 1144360SN/A int result = lstat(path.c_str(), &hostBuf); 1145360SN/A 1146360SN/A if (result < 0) 11471458SN/A return -errno; 1148360SN/A 11498706Sandreas.hansson@arm.com copyOutStatBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 1150360SN/A 11511458SN/A return 0; 1152360SN/A} 1153360SN/A 11541999SN/A/// Target lstat64() handler. 11551999SN/Atemplate <class OS> 11561999SN/ASyscallReturn 115711851Sbrandon.potter@amd.comlstat64Func(SyscallDesc *desc, int callnum, Process *process, 11582680Sktlim@umich.edu ThreadContext *tc) 11591999SN/A{ 11601999SN/A std::string path; 11611999SN/A 11626701Sgblack@eecs.umich.edu int index = 0; 11638852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 11646701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 11656701Sgblack@eecs.umich.edu return -EFAULT; 11666701Sgblack@eecs.umich.edu } 11676701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 11681999SN/A 11693669Sbinkertn@umich.edu // Adjust path for current working directory 11703669Sbinkertn@umich.edu path = process->fullPath(path); 11713669Sbinkertn@umich.edu 11722764Sstever@eecs.umich.edu#if NO_STAT64 11732064SN/A struct stat hostBuf; 11742064SN/A int result = lstat(path.c_str(), &hostBuf); 11752064SN/A#else 11761999SN/A struct stat64 hostBuf; 11771999SN/A int result = lstat64(path.c_str(), &hostBuf); 11782064SN/A#endif 11791999SN/A 11801999SN/A if (result < 0) 11811999SN/A return -errno; 11821999SN/A 11838706Sandreas.hansson@arm.com copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 11841999SN/A 11851999SN/A return 0; 11861999SN/A} 11871999SN/A 1188378SN/A/// Target fstat() handler. 1189360SN/Atemplate <class OS> 11901450SN/ASyscallReturn 119111856Sbrandon.potter@amd.comfstatFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 1192360SN/A{ 11936701Sgblack@eecs.umich.edu int index = 0; 119411856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 119511856Sbrandon.potter@amd.com Addr bufPtr = p->getSyscallArg(tc, index); 1196360SN/A 119711380Salexandru.dutu@amd.com DPRINTF_SYSCALL(Verbose, "fstat(%d, ...)\n", tgt_fd); 1198360SN/A 119911856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 120011856Sbrandon.potter@amd.com if (!ffdp) 12011458SN/A return -EBADF; 120211856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 1203360SN/A 1204360SN/A struct stat hostBuf; 120510931Sbrandon.potter@amd.com int result = fstat(sim_fd, &hostBuf); 1206360SN/A 1207360SN/A if (result < 0) 12081458SN/A return -errno; 1209360SN/A 121010931Sbrandon.potter@amd.com copyOutStatBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf, (sim_fd == 1)); 12112021SN/A 12121458SN/A return 0; 1213360SN/A} 1214360SN/A 1215360SN/A 12161706SN/A/// Target statfs() handler. 12171706SN/Atemplate <class OS> 12181706SN/ASyscallReturn 121911851Sbrandon.potter@amd.comstatfsFunc(SyscallDesc *desc, int callnum, Process *process, 12202680Sktlim@umich.edu ThreadContext *tc) 12211706SN/A{ 122211799Sbrandon.potter@amd.com#if NO_STATFS 122311799Sbrandon.potter@amd.com warn("Host OS cannot support calls to statfs. Ignoring syscall"); 122411799Sbrandon.potter@amd.com#else 12251706SN/A std::string path; 12261706SN/A 12276701Sgblack@eecs.umich.edu int index = 0; 12288852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 12296701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 12306701Sgblack@eecs.umich.edu return -EFAULT; 12316701Sgblack@eecs.umich.edu } 12326701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 12331706SN/A 12343669Sbinkertn@umich.edu // Adjust path for current working directory 12353669Sbinkertn@umich.edu path = process->fullPath(path); 12363669Sbinkertn@umich.edu 12371706SN/A struct statfs hostBuf; 12381706SN/A int result = statfs(path.c_str(), &hostBuf); 12391706SN/A 12401706SN/A if (result < 0) 12412218SN/A return -errno; 12421706SN/A 124311759Sbrandon.potter@amd.com copyOutStatfsBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 124411799Sbrandon.potter@amd.com#endif 12451706SN/A return 0; 12461706SN/A} 12471706SN/A 124811886Sbrandon.potter@amd.comtemplate <class OS> 124911886Sbrandon.potter@amd.comSyscallReturn 125011886Sbrandon.potter@amd.comcloneFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 125111886Sbrandon.potter@amd.com{ 125211886Sbrandon.potter@amd.com int index = 0; 125312426Sqtt2@cornell.edu 125411886Sbrandon.potter@amd.com TheISA::IntReg flags = p->getSyscallArg(tc, index); 125511886Sbrandon.potter@amd.com TheISA::IntReg newStack = p->getSyscallArg(tc, index); 125611886Sbrandon.potter@amd.com Addr ptidPtr = p->getSyscallArg(tc, index); 125712426Sqtt2@cornell.edu 125812426Sqtt2@cornell.edu#if THE_ISA == RISCV_ISA 125912426Sqtt2@cornell.edu /** 126012426Sqtt2@cornell.edu * Linux kernel 4.15 sets CLONE_BACKWARDS flag for RISC-V. 126112426Sqtt2@cornell.edu * The flag defines the list of clone() arguments in the following 126212426Sqtt2@cornell.edu * order: flags -> newStack -> ptidPtr -> tlsPtr -> ctidPtr 126312426Sqtt2@cornell.edu */ 126412426Sqtt2@cornell.edu Addr tlsPtr M5_VAR_USED = p->getSyscallArg(tc, index); 126512426Sqtt2@cornell.edu Addr ctidPtr = p->getSyscallArg(tc, index); 126612426Sqtt2@cornell.edu#else 126711886Sbrandon.potter@amd.com Addr ctidPtr = p->getSyscallArg(tc, index); 126811886Sbrandon.potter@amd.com Addr tlsPtr M5_VAR_USED = p->getSyscallArg(tc, index); 126912426Sqtt2@cornell.edu#endif 127011886Sbrandon.potter@amd.com 127111886Sbrandon.potter@amd.com if (((flags & OS::TGT_CLONE_SIGHAND)&& !(flags & OS::TGT_CLONE_VM)) || 127211886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_THREAD) && !(flags & OS::TGT_CLONE_SIGHAND)) || 127311886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_FS) && (flags & OS::TGT_CLONE_NEWNS)) || 127411886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_NEWIPC) && (flags & OS::TGT_CLONE_SYSVSEM)) || 127511886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_NEWPID) && (flags & OS::TGT_CLONE_THREAD)) || 127611886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_VM) && !(newStack))) 127711886Sbrandon.potter@amd.com return -EINVAL; 127811886Sbrandon.potter@amd.com 127911886Sbrandon.potter@amd.com ThreadContext *ctc; 128011886Sbrandon.potter@amd.com if (!(ctc = p->findFreeContext())) 128111886Sbrandon.potter@amd.com fatal("clone: no spare thread context in system"); 128211886Sbrandon.potter@amd.com 128311886Sbrandon.potter@amd.com /** 128411886Sbrandon.potter@amd.com * Note that ProcessParams is generated by swig and there are no other 128511886Sbrandon.potter@amd.com * examples of how to create anything but this default constructor. The 128611886Sbrandon.potter@amd.com * fields are manually initialized instead of passing parameters to the 128711886Sbrandon.potter@amd.com * constructor. 128811886Sbrandon.potter@amd.com */ 128911886Sbrandon.potter@amd.com ProcessParams *pp = new ProcessParams(); 129011886Sbrandon.potter@amd.com pp->executable.assign(*(new std::string(p->progName()))); 129111886Sbrandon.potter@amd.com pp->cmd.push_back(*(new std::string(p->progName()))); 129211886Sbrandon.potter@amd.com pp->system = p->system; 129311886Sbrandon.potter@amd.com pp->cwd.assign(p->getcwd()); 129411886Sbrandon.potter@amd.com pp->input.assign("stdin"); 129511886Sbrandon.potter@amd.com pp->output.assign("stdout"); 129611886Sbrandon.potter@amd.com pp->errout.assign("stderr"); 129711886Sbrandon.potter@amd.com pp->uid = p->uid(); 129811886Sbrandon.potter@amd.com pp->euid = p->euid(); 129911886Sbrandon.potter@amd.com pp->gid = p->gid(); 130011886Sbrandon.potter@amd.com pp->egid = p->egid(); 130111886Sbrandon.potter@amd.com 130211886Sbrandon.potter@amd.com /* Find the first free PID that's less than the maximum */ 130311886Sbrandon.potter@amd.com std::set<int> const& pids = p->system->PIDs; 130411886Sbrandon.potter@amd.com int temp_pid = *pids.begin(); 130511886Sbrandon.potter@amd.com do { 130611886Sbrandon.potter@amd.com temp_pid++; 130711886Sbrandon.potter@amd.com } while (pids.find(temp_pid) != pids.end()); 130811886Sbrandon.potter@amd.com if (temp_pid >= System::maxPID) 130911886Sbrandon.potter@amd.com fatal("temp_pid is too large: %d", temp_pid); 131011886Sbrandon.potter@amd.com 131111886Sbrandon.potter@amd.com pp->pid = temp_pid; 131211886Sbrandon.potter@amd.com pp->ppid = (flags & OS::TGT_CLONE_THREAD) ? p->ppid() : p->pid(); 131311886Sbrandon.potter@amd.com Process *cp = pp->create(); 131411886Sbrandon.potter@amd.com delete pp; 131511886Sbrandon.potter@amd.com 131611886Sbrandon.potter@amd.com Process *owner = ctc->getProcessPtr(); 131711886Sbrandon.potter@amd.com ctc->setProcessPtr(cp); 131811886Sbrandon.potter@amd.com cp->assignThreadContext(ctc->contextId()); 131911886Sbrandon.potter@amd.com owner->revokeThreadContext(ctc->contextId()); 132011886Sbrandon.potter@amd.com 132111886Sbrandon.potter@amd.com if (flags & OS::TGT_CLONE_PARENT_SETTID) { 132211886Sbrandon.potter@amd.com BufferArg ptidBuf(ptidPtr, sizeof(long)); 132311886Sbrandon.potter@amd.com long *ptid = (long *)ptidBuf.bufferPtr(); 132411886Sbrandon.potter@amd.com *ptid = cp->pid(); 132511886Sbrandon.potter@amd.com ptidBuf.copyOut(tc->getMemProxy()); 132611886Sbrandon.potter@amd.com } 132711886Sbrandon.potter@amd.com 132811886Sbrandon.potter@amd.com cp->initState(); 132911886Sbrandon.potter@amd.com p->clone(tc, ctc, cp, flags); 133011886Sbrandon.potter@amd.com 133111911SBrandon.Potter@amd.com if (flags & OS::TGT_CLONE_THREAD) { 133211911SBrandon.Potter@amd.com delete cp->sigchld; 133311911SBrandon.Potter@amd.com cp->sigchld = p->sigchld; 133411911SBrandon.Potter@amd.com } else if (flags & OS::TGT_SIGCHLD) { 133511911SBrandon.Potter@amd.com *cp->sigchld = true; 133611911SBrandon.Potter@amd.com } 133711911SBrandon.Potter@amd.com 133811886Sbrandon.potter@amd.com if (flags & OS::TGT_CLONE_CHILD_SETTID) { 133911886Sbrandon.potter@amd.com BufferArg ctidBuf(ctidPtr, sizeof(long)); 134011886Sbrandon.potter@amd.com long *ctid = (long *)ctidBuf.bufferPtr(); 134111886Sbrandon.potter@amd.com *ctid = cp->pid(); 134211886Sbrandon.potter@amd.com ctidBuf.copyOut(ctc->getMemProxy()); 134311886Sbrandon.potter@amd.com } 134411886Sbrandon.potter@amd.com 134511886Sbrandon.potter@amd.com if (flags & OS::TGT_CLONE_CHILD_CLEARTID) 134611886Sbrandon.potter@amd.com cp->childClearTID = (uint64_t)ctidPtr; 134711886Sbrandon.potter@amd.com 134811886Sbrandon.potter@amd.com ctc->clearArchRegs(); 134911886Sbrandon.potter@amd.com 135011886Sbrandon.potter@amd.com#if THE_ISA == ALPHA_ISA 135111886Sbrandon.potter@amd.com TheISA::copyMiscRegs(tc, ctc); 135211886Sbrandon.potter@amd.com#elif THE_ISA == SPARC_ISA 135311886Sbrandon.potter@amd.com TheISA::copyRegs(tc, ctc); 135411886Sbrandon.potter@amd.com ctc->setIntReg(TheISA::NumIntArchRegs + 6, 0); 135511886Sbrandon.potter@amd.com ctc->setIntReg(TheISA::NumIntArchRegs + 4, 0); 135611886Sbrandon.potter@amd.com ctc->setIntReg(TheISA::NumIntArchRegs + 3, TheISA::NWindows - 2); 135711886Sbrandon.potter@amd.com ctc->setIntReg(TheISA::NumIntArchRegs + 5, TheISA::NWindows); 135811886Sbrandon.potter@amd.com ctc->setMiscReg(TheISA::MISCREG_CWP, 0); 135911886Sbrandon.potter@amd.com ctc->setIntReg(TheISA::NumIntArchRegs + 7, 0); 136011886Sbrandon.potter@amd.com ctc->setMiscRegNoEffect(TheISA::MISCREG_TL, 0); 136111886Sbrandon.potter@amd.com ctc->setMiscReg(TheISA::MISCREG_ASI, TheISA::ASI_PRIMARY); 136211886Sbrandon.potter@amd.com for (int y = 8; y < 32; y++) 136311886Sbrandon.potter@amd.com ctc->setIntReg(y, tc->readIntReg(y)); 136412426Sqtt2@cornell.edu#elif THE_ISA == ARM_ISA or THE_ISA == X86_ISA or THE_ISA == RISCV_ISA 136511886Sbrandon.potter@amd.com TheISA::copyRegs(tc, ctc); 136611886Sbrandon.potter@amd.com#endif 136711886Sbrandon.potter@amd.com 136811886Sbrandon.potter@amd.com#if THE_ISA == X86_ISA 136911886Sbrandon.potter@amd.com if (flags & OS::TGT_CLONE_SETTLS) { 137011886Sbrandon.potter@amd.com ctc->setMiscRegNoEffect(TheISA::MISCREG_FS_BASE, tlsPtr); 137111886Sbrandon.potter@amd.com ctc->setMiscRegNoEffect(TheISA::MISCREG_FS_EFF_BASE, tlsPtr); 137211886Sbrandon.potter@amd.com } 137311886Sbrandon.potter@amd.com#endif 137411886Sbrandon.potter@amd.com 137511886Sbrandon.potter@amd.com if (newStack) 137611886Sbrandon.potter@amd.com ctc->setIntReg(TheISA::StackPointerReg, newStack); 137711886Sbrandon.potter@amd.com 137811886Sbrandon.potter@amd.com cp->setSyscallReturn(ctc, 0); 137911886Sbrandon.potter@amd.com 138011886Sbrandon.potter@amd.com#if THE_ISA == ALPHA_ISA 138111886Sbrandon.potter@amd.com ctc->setIntReg(TheISA::SyscallSuccessReg, 0); 138211886Sbrandon.potter@amd.com#elif THE_ISA == SPARC_ISA 138311886Sbrandon.potter@amd.com tc->setIntReg(TheISA::SyscallPseudoReturnReg, 0); 138411886Sbrandon.potter@amd.com ctc->setIntReg(TheISA::SyscallPseudoReturnReg, 1); 138511886Sbrandon.potter@amd.com#endif 138611886Sbrandon.potter@amd.com 138711886Sbrandon.potter@amd.com ctc->pcState(tc->nextInstAddr()); 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