syscall_emul.hh revision 13629
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> 8113570Sbrandon.potter@amd.com#include <poll.h> 8211383Sbrandon.potter@amd.com#include <sys/mman.h> 8313568Sbrandon.potter@amd.com#include <sys/socket.h> 843113Sgblack@eecs.umich.edu#include <sys/stat.h> 8511799Sbrandon.potter@amd.com#if (NO_STATFS == 0) 8611759Sbrandon.potter@amd.com#include <sys/statfs.h> 8711812Sbaz21@cam.ac.uk#else 8811812Sbaz21@cam.ac.uk#include <sys/mount.h> 8911799Sbrandon.potter@amd.com#endif 908229Snate@binkert.org#include <sys/time.h> 9113570Sbrandon.potter@amd.com#include <sys/types.h> 928229Snate@binkert.org#include <sys/uio.h> 9311594Santhony.gutierrez@amd.com#include <unistd.h> 947075Snate@binkert.org 958229Snate@binkert.org#include <cerrno> 9611856Sbrandon.potter@amd.com#include <memory> 977075Snate@binkert.org#include <string> 98360SN/A 9912461Sgabeblack@google.com#include "arch/generic/tlb.hh" 10011886Sbrandon.potter@amd.com#include "arch/utility.hh" 10111800Sbrandon.potter@amd.com#include "base/intmath.hh" 10211392Sbrandon.potter@amd.com#include "base/loader/object_file.hh" 10312334Sgabeblack@google.com#include "base/logging.hh" 1041354SN/A#include "base/trace.hh" 1056216Snate@binkert.org#include "base/types.hh" 1066658Snate@binkert.org#include "config/the_isa.hh" 1072474SN/A#include "cpu/base.hh" 1082680Sktlim@umich.edu#include "cpu/thread_context.hh" 1098229Snate@binkert.org#include "mem/page_table.hh" 11011886Sbrandon.potter@amd.com#include "params/Process.hh" 11110496Ssteve.reinhardt@amd.com#include "sim/emul_driver.hh" 11211911SBrandon.Potter@amd.com#include "sim/futex_map.hh" 1138229Snate@binkert.org#include "sim/process.hh" 11411794Sbrandon.potter@amd.com#include "sim/syscall_debug_macros.hh" 11511886Sbrandon.potter@amd.com#include "sim/syscall_desc.hh" 11610497Ssteve.reinhardt@amd.com#include "sim/syscall_emul_buf.hh" 11711794Sbrandon.potter@amd.com#include "sim/syscall_return.hh" 118360SN/A 11913629SAndrea.Mondelli@ucf.edu#if defined(__APPLE__) && defined(__MACH__) && !defined(CMSG_ALIGN) 12013629SAndrea.Mondelli@ucf.edu#define CMSG_ALIGN(len) (((len) + sizeof(size_t) - 1) & ~(sizeof(size_t) - 1)) 12113629SAndrea.Mondelli@ucf.edu#endif 12213629SAndrea.Mondelli@ucf.edu 123360SN/A////////////////////////////////////////////////////////////////////// 124360SN/A// 125360SN/A// The following emulation functions are generic enough that they 126360SN/A// don't need to be recompiled for different emulated OS's. They are 127360SN/A// defined in sim/syscall_emul.cc. 128360SN/A// 129360SN/A////////////////////////////////////////////////////////////////////// 130360SN/A 131360SN/A 132378SN/A/// Handler for unimplemented syscalls that we haven't thought about. 1331706SN/ASyscallReturn unimplementedFunc(SyscallDesc *desc, int num, 13411851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 135378SN/A 136378SN/A/// Handler for unimplemented syscalls that we never intend to 137378SN/A/// implement (signal handling, etc.) and should not affect the correct 138378SN/A/// behavior of the program. Print a warning only if the appropriate 139378SN/A/// trace flag is enabled. Return success to the target program. 1401706SN/ASyscallReturn ignoreFunc(SyscallDesc *desc, int num, 14111851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 142360SN/A 14311760Sbrandon.potter@amd.com// Target fallocateFunc() handler. 14411760Sbrandon.potter@amd.comSyscallReturn fallocateFunc(SyscallDesc *desc, int num, 14511851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 14611760Sbrandon.potter@amd.com 1476109Ssanchezd@stanford.edu/// Target exit() handler: terminate current context. 1481706SN/ASyscallReturn exitFunc(SyscallDesc *desc, int num, 14911851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 150378SN/A 1516109Ssanchezd@stanford.edu/// Target exit_group() handler: terminate simulation. (exit all threads) 1526109Ssanchezd@stanford.eduSyscallReturn exitGroupFunc(SyscallDesc *desc, int num, 15311851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 1546109Ssanchezd@stanford.edu 15511886Sbrandon.potter@amd.com/// Target set_tid_address() handler. 15611886Sbrandon.potter@amd.comSyscallReturn setTidAddressFunc(SyscallDesc *desc, int num, 15711886Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 15811886Sbrandon.potter@amd.com 159378SN/A/// Target getpagesize() handler. 1601706SN/ASyscallReturn getpagesizeFunc(SyscallDesc *desc, int num, 16111851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 162378SN/A 1635748SSteve.Reinhardt@amd.com/// Target brk() handler: set brk address. 1645748SSteve.Reinhardt@amd.comSyscallReturn brkFunc(SyscallDesc *desc, int num, 16511851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 166378SN/A 167378SN/A/// Target close() handler. 1681706SN/ASyscallReturn closeFunc(SyscallDesc *desc, int num, 16911851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 170378SN/A 171378SN/A/// Target lseek() handler. 1721706SN/ASyscallReturn lseekFunc(SyscallDesc *desc, int num, 17311851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 174378SN/A 1754118Sgblack@eecs.umich.edu/// Target _llseek() handler. 1764118Sgblack@eecs.umich.eduSyscallReturn _llseekFunc(SyscallDesc *desc, int num, 17711851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 1784118Sgblack@eecs.umich.edu 179378SN/A/// Target munmap() handler. 1801706SN/ASyscallReturn munmapFunc(SyscallDesc *desc, int num, 18111851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 182378SN/A 18313568Sbrandon.potter@amd.com/// Target shutdown() handler. 18413568Sbrandon.potter@amd.comSyscallReturn shutdownFunc(SyscallDesc *desc, int num, 18513568Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 18613568Sbrandon.potter@amd.com 187378SN/A/// Target gethostname() handler. 1881706SN/ASyscallReturn gethostnameFunc(SyscallDesc *desc, int num, 18911851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 190360SN/A 1915513SMichael.Adler@intel.com/// Target getcwd() handler. 1925513SMichael.Adler@intel.comSyscallReturn getcwdFunc(SyscallDesc *desc, int num, 19311851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 1945513SMichael.Adler@intel.com 19510203SAli.Saidi@ARM.com/// Target readlink() handler. 19610203SAli.Saidi@ARM.comSyscallReturn readlinkFunc(SyscallDesc *desc, int num, 19711851Sbrandon.potter@amd.com Process *p, ThreadContext *tc, 19810203SAli.Saidi@ARM.com int index = 0); 1995513SMichael.Adler@intel.comSyscallReturn readlinkFunc(SyscallDesc *desc, int num, 20011851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2015513SMichael.Adler@intel.com 202511SN/A/// Target unlink() handler. 20310633Smichaelupton@gmail.comSyscallReturn unlinkHelper(SyscallDesc *desc, int num, 20411851Sbrandon.potter@amd.com Process *p, ThreadContext *tc, 20510633Smichaelupton@gmail.com int index); 2061706SN/ASyscallReturn unlinkFunc(SyscallDesc *desc, int num, 20711851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 208511SN/A 20912795Smattdsinclair@gmail.com/// Target link() handler 21012795Smattdsinclair@gmail.comSyscallReturn linkFunc(SyscallDesc *desc, int num, Process *p, 21112795Smattdsinclair@gmail.com ThreadContext *tc); 21212795Smattdsinclair@gmail.com 21312796Smattdsinclair@gmail.com/// Target symlink() handler. 21412796Smattdsinclair@gmail.comSyscallReturn symlinkFunc(SyscallDesc *desc, int num, Process *p, 21512796Smattdsinclair@gmail.com ThreadContext *tc); 21612796Smattdsinclair@gmail.com 2175513SMichael.Adler@intel.com/// Target mkdir() handler. 2185513SMichael.Adler@intel.comSyscallReturn mkdirFunc(SyscallDesc *desc, int num, 21911851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2205513SMichael.Adler@intel.com 22113031Sbrandon.potter@amd.com/// Target mknod() handler. 22213031Sbrandon.potter@amd.comSyscallReturn mknodFunc(SyscallDesc *desc, int num, 22313031Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 22413031Sbrandon.potter@amd.com 22513031Sbrandon.potter@amd.com/// Target chdir() handler. 22613031Sbrandon.potter@amd.comSyscallReturn chdirFunc(SyscallDesc *desc, int num, 22713031Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 22813031Sbrandon.potter@amd.com 22913031Sbrandon.potter@amd.com// Target rmdir() handler. 23013031Sbrandon.potter@amd.comSyscallReturn rmdirFunc(SyscallDesc *desc, int num, 23113031Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 23213031Sbrandon.potter@amd.com 233511SN/A/// Target rename() handler. 2341706SN/ASyscallReturn renameFunc(SyscallDesc *desc, int num, 23511851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2361706SN/A 2371706SN/A 2381706SN/A/// Target truncate() handler. 2391706SN/ASyscallReturn truncateFunc(SyscallDesc *desc, int num, 24011851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2411706SN/A 2421706SN/A 2431706SN/A/// Target ftruncate() handler. 2441706SN/ASyscallReturn ftruncateFunc(SyscallDesc *desc, int num, 24511851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2461706SN/A 247511SN/A 2486703Svince@csl.cornell.edu/// Target truncate64() handler. 2496703Svince@csl.cornell.eduSyscallReturn truncate64Func(SyscallDesc *desc, int num, 25011851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2516703Svince@csl.cornell.edu 2526685Stjones1@inf.ed.ac.uk/// Target ftruncate64() handler. 2536685Stjones1@inf.ed.ac.ukSyscallReturn ftruncate64Func(SyscallDesc *desc, int num, 25411851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2556685Stjones1@inf.ed.ac.uk 2566685Stjones1@inf.ed.ac.uk 2575513SMichael.Adler@intel.com/// Target umask() handler. 2585513SMichael.Adler@intel.comSyscallReturn umaskFunc(SyscallDesc *desc, int num, 25911851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2605513SMichael.Adler@intel.com 26111885Sbrandon.potter@amd.com/// Target gettid() handler. 26211885Sbrandon.potter@amd.comSyscallReturn gettidFunc(SyscallDesc *desc, int num, 26311885Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2645513SMichael.Adler@intel.com 2651999SN/A/// Target chown() handler. 2661999SN/ASyscallReturn chownFunc(SyscallDesc *desc, int num, 26711851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2681999SN/A 26911885Sbrandon.potter@amd.com/// Target setpgid() handler. 27011885Sbrandon.potter@amd.comSyscallReturn setpgidFunc(SyscallDesc *desc, int num, 27111885Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2721999SN/A 2731999SN/A/// Target fchown() handler. 2741999SN/ASyscallReturn fchownFunc(SyscallDesc *desc, int num, 27511851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2761999SN/A 2773079Sstever@eecs.umich.edu/// Target dup() handler. 2783079Sstever@eecs.umich.eduSyscallReturn dupFunc(SyscallDesc *desc, int num, 27911851Sbrandon.potter@amd.com Process *process, ThreadContext *tc); 2803079Sstever@eecs.umich.edu 28111908SBrandon.Potter@amd.com/// Target dup2() handler. 28211908SBrandon.Potter@amd.comSyscallReturn dup2Func(SyscallDesc *desc, int num, 28311908SBrandon.Potter@amd.com Process *process, ThreadContext *tc); 28411908SBrandon.Potter@amd.com 28511875Sbrandon.potter@amd.com/// Target fcntl() handler. 2862093SN/ASyscallReturn fcntlFunc(SyscallDesc *desc, int num, 28711851Sbrandon.potter@amd.com Process *process, ThreadContext *tc); 2882093SN/A 2892687Sksewell@umich.edu/// Target fcntl64() handler. 2902687Sksewell@umich.eduSyscallReturn fcntl64Func(SyscallDesc *desc, int num, 29111851Sbrandon.potter@amd.com Process *process, ThreadContext *tc); 2922687Sksewell@umich.edu 2932238SN/A/// Target setuid() handler. 2942238SN/ASyscallReturn setuidFunc(SyscallDesc *desc, int num, 29511851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2962238SN/A 29711908SBrandon.Potter@amd.com/// Target pipe() handler. 29811908SBrandon.Potter@amd.comSyscallReturn pipeFunc(SyscallDesc *desc, int num, 29911908SBrandon.Potter@amd.com Process *p, ThreadContext *tc); 30011908SBrandon.Potter@amd.com 30111908SBrandon.Potter@amd.com/// Internal pipe() handler. 30211908SBrandon.Potter@amd.comSyscallReturn pipeImpl(SyscallDesc *desc, int num, Process *p, 30311908SBrandon.Potter@amd.com ThreadContext *tc, bool pseudoPipe); 30411908SBrandon.Potter@amd.com 3052238SN/A/// Target getpid() handler. 3062238SN/ASyscallReturn getpidFunc(SyscallDesc *desc, int num, 30711851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3082238SN/A 30913571Sbrandon.potter@amd.com// Target getpeername() handler. 31013571Sbrandon.potter@amd.comSyscallReturn getpeernameFunc(SyscallDesc *desc, int num, 31113571Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 31213571Sbrandon.potter@amd.com 31313568Sbrandon.potter@amd.com// Target bind() handler. 31413568Sbrandon.potter@amd.comSyscallReturn bindFunc(SyscallDesc *desc, int num, 31513568Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 31613568Sbrandon.potter@amd.com 31713568Sbrandon.potter@amd.com// Target listen() handler. 31813568Sbrandon.potter@amd.comSyscallReturn listenFunc(SyscallDesc *desc, int num, 31913568Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 32013568Sbrandon.potter@amd.com 32113568Sbrandon.potter@amd.com// Target connect() handler. 32213568Sbrandon.potter@amd.comSyscallReturn connectFunc(SyscallDesc *desc, int num, 32313568Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 32413568Sbrandon.potter@amd.com 32513448Sciro.santilli@arm.com#if defined(SYS_getdents) 32613031Sbrandon.potter@amd.com// Target getdents() handler. 32713031Sbrandon.potter@amd.comSyscallReturn getdentsFunc(SyscallDesc *desc, int num, 32813031Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 32913448Sciro.santilli@arm.com#endif 33013031Sbrandon.potter@amd.com 33113539Sjavier.setoain@arm.com#if defined(SYS_getdents64) 33213539Sjavier.setoain@arm.com// Target getdents() handler. 33313539Sjavier.setoain@arm.comSyscallReturn getdents64Func(SyscallDesc *desc, int num, 33413539Sjavier.setoain@arm.com Process *p, ThreadContext *tc); 33513539Sjavier.setoain@arm.com#endif 33613539Sjavier.setoain@arm.com 33713569Sbrandon.potter@amd.com// Target sendto() handler. 33813569Sbrandon.potter@amd.comSyscallReturn sendtoFunc(SyscallDesc *desc, int num, 33913569Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 34013569Sbrandon.potter@amd.com 34113569Sbrandon.potter@amd.com// Target recvfrom() handler. 34213569Sbrandon.potter@amd.comSyscallReturn recvfromFunc(SyscallDesc *desc, int num, 34313569Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 34413569Sbrandon.potter@amd.com 34513569Sbrandon.potter@amd.com// Target recvmsg() handler. 34613569Sbrandon.potter@amd.comSyscallReturn recvmsgFunc(SyscallDesc *desc, int num, 34713569Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 34813569Sbrandon.potter@amd.com 34913569Sbrandon.potter@amd.com// Target sendmsg() handler. 35013569Sbrandon.potter@amd.comSyscallReturn sendmsgFunc(SyscallDesc *desc, int num, 35113569Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 35213569Sbrandon.potter@amd.com 35313031Sbrandon.potter@amd.com// Target getuid() handler. 3542238SN/ASyscallReturn getuidFunc(SyscallDesc *desc, int num, 35511851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3562238SN/A 3572238SN/A/// Target getgid() handler. 3582238SN/ASyscallReturn getgidFunc(SyscallDesc *desc, int num, 35911851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3602238SN/A 3612238SN/A/// Target getppid() handler. 3622238SN/ASyscallReturn getppidFunc(SyscallDesc *desc, int num, 36311851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3642238SN/A 3652238SN/A/// Target geteuid() handler. 3662238SN/ASyscallReturn geteuidFunc(SyscallDesc *desc, int num, 36711851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3682238SN/A 3692238SN/A/// Target getegid() handler. 3702238SN/ASyscallReturn getegidFunc(SyscallDesc *desc, int num, 37111851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3722238SN/A 3739455Smitch.hayenga+gem5@gmail.com/// Target access() handler 3749455Smitch.hayenga+gem5@gmail.comSyscallReturn accessFunc(SyscallDesc *desc, int num, 37511851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 37610203SAli.Saidi@ARM.comSyscallReturn accessFunc(SyscallDesc *desc, int num, 37711851Sbrandon.potter@amd.com Process *p, ThreadContext *tc, 37811851Sbrandon.potter@amd.com int index); 3799455Smitch.hayenga+gem5@gmail.com 38013571Sbrandon.potter@amd.com// Target getsockopt() handler. 38113571Sbrandon.potter@amd.comSyscallReturn getsockoptFunc(SyscallDesc *desc, int num, 38213571Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 38313571Sbrandon.potter@amd.com 38413571Sbrandon.potter@amd.com// Target setsockopt() handler. 38513571Sbrandon.potter@amd.comSyscallReturn setsockoptFunc(SyscallDesc *desc, int num, 38613571Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 38713571Sbrandon.potter@amd.com 38813571Sbrandon.potter@amd.com// Target getsockname() handler. 38913571Sbrandon.potter@amd.comSyscallReturn getsocknameFunc(SyscallDesc *desc, int num, 39013571Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 39113571Sbrandon.potter@amd.com 3929112Smarc.orr@gmail.com/// Futex system call 39311906SBrandon.Potter@amd.com/// Implemented by Daniel Sanchez 39411906SBrandon.Potter@amd.com/// Used by printf's in multi-threaded apps 3959112Smarc.orr@gmail.comtemplate <class OS> 3969112Smarc.orr@gmail.comSyscallReturn 39711851Sbrandon.potter@amd.comfutexFunc(SyscallDesc *desc, int callnum, Process *process, 3989112Smarc.orr@gmail.com ThreadContext *tc) 3999112Smarc.orr@gmail.com{ 40011911SBrandon.Potter@amd.com using namespace std; 4019112Smarc.orr@gmail.com 40211911SBrandon.Potter@amd.com int index = 0; 40311911SBrandon.Potter@amd.com Addr uaddr = process->getSyscallArg(tc, index); 40411911SBrandon.Potter@amd.com int op = process->getSyscallArg(tc, index); 40511911SBrandon.Potter@amd.com int val = process->getSyscallArg(tc, index); 4069112Smarc.orr@gmail.com 40711911SBrandon.Potter@amd.com /* 40811911SBrandon.Potter@amd.com * Unsupported option that does not affect the correctness of the 40911911SBrandon.Potter@amd.com * application. This is a performance optimization utilized by Linux. 41011911SBrandon.Potter@amd.com */ 4119238Slluc.alvarez@bsc.es op &= ~OS::TGT_FUTEX_PRIVATE_FLAG; 4129112Smarc.orr@gmail.com 41311911SBrandon.Potter@amd.com FutexMap &futex_map = tc->getSystemPtr()->futexMap; 4149112Smarc.orr@gmail.com 41511911SBrandon.Potter@amd.com if (OS::TGT_FUTEX_WAIT == op) { 41611911SBrandon.Potter@amd.com // Ensure futex system call accessed atomically. 41711911SBrandon.Potter@amd.com BufferArg buf(uaddr, sizeof(int)); 41811911SBrandon.Potter@amd.com buf.copyIn(tc->getMemProxy()); 41911911SBrandon.Potter@amd.com int mem_val = *(int*)buf.bufferPtr(); 4209112Smarc.orr@gmail.com 42111911SBrandon.Potter@amd.com /* 42211911SBrandon.Potter@amd.com * The value in memory at uaddr is not equal with the expected val 42311911SBrandon.Potter@amd.com * (a different thread must have changed it before the system call was 42411911SBrandon.Potter@amd.com * invoked). In this case, we need to throw an error. 42511911SBrandon.Potter@amd.com */ 42611911SBrandon.Potter@amd.com if (val != mem_val) 4279112Smarc.orr@gmail.com return -OS::TGT_EWOULDBLOCK; 4289112Smarc.orr@gmail.com 42911911SBrandon.Potter@amd.com futex_map.suspend(uaddr, process->tgid(), tc); 43011911SBrandon.Potter@amd.com 4319112Smarc.orr@gmail.com return 0; 43211911SBrandon.Potter@amd.com } else if (OS::TGT_FUTEX_WAKE == op) { 43311911SBrandon.Potter@amd.com return futex_map.wakeup(uaddr, process->tgid(), val); 4349112Smarc.orr@gmail.com } 4359112Smarc.orr@gmail.com 43611911SBrandon.Potter@amd.com warn("futex: op %d not implemented; ignoring.", op); 43711911SBrandon.Potter@amd.com return -ENOSYS; 4389112Smarc.orr@gmail.com} 4399112Smarc.orr@gmail.com 4402238SN/A 4412238SN/A/// Pseudo Funcs - These functions use a different return convension, 4422238SN/A/// returning a second value in a register other than the normal return register 4432238SN/ASyscallReturn pipePseudoFunc(SyscallDesc *desc, int num, 44411851Sbrandon.potter@amd.com Process *process, ThreadContext *tc); 4452238SN/A 4462238SN/A/// Target getpidPseudo() handler. 4472238SN/ASyscallReturn getpidPseudoFunc(SyscallDesc *desc, int num, 44811851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 4492238SN/A 4502238SN/A/// Target getuidPseudo() handler. 4512238SN/ASyscallReturn getuidPseudoFunc(SyscallDesc *desc, int num, 45211851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 4532238SN/A 4542238SN/A/// Target getgidPseudo() handler. 4552238SN/ASyscallReturn getgidPseudoFunc(SyscallDesc *desc, int num, 45611851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 4572238SN/A 4582238SN/A 4591354SN/A/// A readable name for 1,000,000, for converting microseconds to seconds. 4601354SN/Aconst int one_million = 1000000; 46110796Sbrandon.potter@amd.com/// A readable name for 1,000,000,000, for converting nanoseconds to seconds. 46210796Sbrandon.potter@amd.comconst int one_billion = 1000000000; 4631354SN/A 4641354SN/A/// Approximate seconds since the epoch (1/1/1970). About a billion, 4651354SN/A/// by my reckoning. We want to keep this a constant (not use the 4661354SN/A/// real-world time) to keep simulations repeatable. 4671354SN/Aconst unsigned seconds_since_epoch = 1000000000; 4681354SN/A 4691354SN/A/// Helper function to convert current elapsed time to seconds and 4701354SN/A/// microseconds. 4711354SN/Atemplate <class T1, class T2> 4721354SN/Avoid 47310796Sbrandon.potter@amd.comgetElapsedTimeMicro(T1 &sec, T2 &usec) 4741354SN/A{ 47510796Sbrandon.potter@amd.com uint64_t elapsed_usecs = curTick() / SimClock::Int::us; 4761354SN/A sec = elapsed_usecs / one_million; 4771354SN/A usec = elapsed_usecs % one_million; 4781354SN/A} 4791354SN/A 48010796Sbrandon.potter@amd.com/// Helper function to convert current elapsed time to seconds and 48110796Sbrandon.potter@amd.com/// nanoseconds. 48210796Sbrandon.potter@amd.comtemplate <class T1, class T2> 48310796Sbrandon.potter@amd.comvoid 48410796Sbrandon.potter@amd.comgetElapsedTimeNano(T1 &sec, T2 &nsec) 48510796Sbrandon.potter@amd.com{ 48610796Sbrandon.potter@amd.com uint64_t elapsed_nsecs = curTick() / SimClock::Int::ns; 48710796Sbrandon.potter@amd.com sec = elapsed_nsecs / one_billion; 48810796Sbrandon.potter@amd.com nsec = elapsed_nsecs % one_billion; 48910796Sbrandon.potter@amd.com} 49010796Sbrandon.potter@amd.com 491360SN/A////////////////////////////////////////////////////////////////////// 492360SN/A// 493360SN/A// The following emulation functions are generic, but need to be 494360SN/A// templated to account for differences in types, constants, etc. 495360SN/A// 496360SN/A////////////////////////////////////////////////////////////////////// 497360SN/A 49811759Sbrandon.potter@amd.com typedef struct statfs hst_statfs; 4993113Sgblack@eecs.umich.edu#if NO_STAT64 5003113Sgblack@eecs.umich.edu typedef struct stat hst_stat; 5013113Sgblack@eecs.umich.edu typedef struct stat hst_stat64; 5023113Sgblack@eecs.umich.edu#else 5033113Sgblack@eecs.umich.edu typedef struct stat hst_stat; 5043113Sgblack@eecs.umich.edu typedef struct stat64 hst_stat64; 5053113Sgblack@eecs.umich.edu#endif 5063113Sgblack@eecs.umich.edu 5073113Sgblack@eecs.umich.edu//// Helper function to convert a host stat buffer to a target stat 5083113Sgblack@eecs.umich.edu//// buffer. Also copies the target buffer out to the simulated 5093113Sgblack@eecs.umich.edu//// memory space. Used by stat(), fstat(), and lstat(). 5103113Sgblack@eecs.umich.edu 5113113Sgblack@eecs.umich.edutemplate <typename target_stat, typename host_stat> 51212032Sandreas.sandberg@arm.comvoid 5133113Sgblack@eecs.umich.educonvertStatBuf(target_stat &tgt, host_stat *host, bool fakeTTY = false) 5143113Sgblack@eecs.umich.edu{ 5154189Sgblack@eecs.umich.edu using namespace TheISA; 5164189Sgblack@eecs.umich.edu 5173113Sgblack@eecs.umich.edu if (fakeTTY) 5183113Sgblack@eecs.umich.edu tgt->st_dev = 0xA; 5193113Sgblack@eecs.umich.edu else 5203113Sgblack@eecs.umich.edu tgt->st_dev = host->st_dev; 5218737Skoansin.tan@gmail.com tgt->st_dev = TheISA::htog(tgt->st_dev); 5223113Sgblack@eecs.umich.edu tgt->st_ino = host->st_ino; 5238737Skoansin.tan@gmail.com tgt->st_ino = TheISA::htog(tgt->st_ino); 5243277Sgblack@eecs.umich.edu tgt->st_mode = host->st_mode; 5255515SMichael.Adler@intel.com if (fakeTTY) { 5265515SMichael.Adler@intel.com // Claim to be a character device 5275515SMichael.Adler@intel.com tgt->st_mode &= ~S_IFMT; // Clear S_IFMT 5285515SMichael.Adler@intel.com tgt->st_mode |= S_IFCHR; // Set S_IFCHR 5295515SMichael.Adler@intel.com } 5308737Skoansin.tan@gmail.com tgt->st_mode = TheISA::htog(tgt->st_mode); 5313277Sgblack@eecs.umich.edu tgt->st_nlink = host->st_nlink; 5328737Skoansin.tan@gmail.com tgt->st_nlink = TheISA::htog(tgt->st_nlink); 5333277Sgblack@eecs.umich.edu tgt->st_uid = host->st_uid; 5348737Skoansin.tan@gmail.com tgt->st_uid = TheISA::htog(tgt->st_uid); 5353277Sgblack@eecs.umich.edu tgt->st_gid = host->st_gid; 5368737Skoansin.tan@gmail.com tgt->st_gid = TheISA::htog(tgt->st_gid); 5373113Sgblack@eecs.umich.edu if (fakeTTY) 5383113Sgblack@eecs.umich.edu tgt->st_rdev = 0x880d; 5393113Sgblack@eecs.umich.edu else 5403113Sgblack@eecs.umich.edu tgt->st_rdev = host->st_rdev; 5418737Skoansin.tan@gmail.com tgt->st_rdev = TheISA::htog(tgt->st_rdev); 5423113Sgblack@eecs.umich.edu tgt->st_size = host->st_size; 5438737Skoansin.tan@gmail.com tgt->st_size = TheISA::htog(tgt->st_size); 5443114Sgblack@eecs.umich.edu tgt->st_atimeX = host->st_atime; 5458737Skoansin.tan@gmail.com tgt->st_atimeX = TheISA::htog(tgt->st_atimeX); 5463114Sgblack@eecs.umich.edu tgt->st_mtimeX = host->st_mtime; 5478737Skoansin.tan@gmail.com tgt->st_mtimeX = TheISA::htog(tgt->st_mtimeX); 5483114Sgblack@eecs.umich.edu tgt->st_ctimeX = host->st_ctime; 5498737Skoansin.tan@gmail.com tgt->st_ctimeX = TheISA::htog(tgt->st_ctimeX); 55011906SBrandon.Potter@amd.com // Force the block size to be 8KB. This helps to ensure buffered io works 5514061Sgblack@eecs.umich.edu // consistently across different hosts. 5524061Sgblack@eecs.umich.edu tgt->st_blksize = 0x2000; 5538737Skoansin.tan@gmail.com tgt->st_blksize = TheISA::htog(tgt->st_blksize); 5543113Sgblack@eecs.umich.edu tgt->st_blocks = host->st_blocks; 5558737Skoansin.tan@gmail.com tgt->st_blocks = TheISA::htog(tgt->st_blocks); 5563113Sgblack@eecs.umich.edu} 5573113Sgblack@eecs.umich.edu 5583113Sgblack@eecs.umich.edu// Same for stat64 5593113Sgblack@eecs.umich.edu 5603113Sgblack@eecs.umich.edutemplate <typename target_stat, typename host_stat64> 56112032Sandreas.sandberg@arm.comvoid 5623113Sgblack@eecs.umich.educonvertStat64Buf(target_stat &tgt, host_stat64 *host, bool fakeTTY = false) 5633113Sgblack@eecs.umich.edu{ 5644189Sgblack@eecs.umich.edu using namespace TheISA; 5654189Sgblack@eecs.umich.edu 5663113Sgblack@eecs.umich.edu convertStatBuf<target_stat, host_stat64>(tgt, host, fakeTTY); 5673113Sgblack@eecs.umich.edu#if defined(STAT_HAVE_NSEC) 5683113Sgblack@eecs.umich.edu tgt->st_atime_nsec = host->st_atime_nsec; 5698737Skoansin.tan@gmail.com tgt->st_atime_nsec = TheISA::htog(tgt->st_atime_nsec); 5703113Sgblack@eecs.umich.edu tgt->st_mtime_nsec = host->st_mtime_nsec; 5718737Skoansin.tan@gmail.com tgt->st_mtime_nsec = TheISA::htog(tgt->st_mtime_nsec); 5723113Sgblack@eecs.umich.edu tgt->st_ctime_nsec = host->st_ctime_nsec; 5738737Skoansin.tan@gmail.com tgt->st_ctime_nsec = TheISA::htog(tgt->st_ctime_nsec); 5743113Sgblack@eecs.umich.edu#else 5753113Sgblack@eecs.umich.edu tgt->st_atime_nsec = 0; 5763113Sgblack@eecs.umich.edu tgt->st_mtime_nsec = 0; 5773113Sgblack@eecs.umich.edu tgt->st_ctime_nsec = 0; 5783113Sgblack@eecs.umich.edu#endif 5793113Sgblack@eecs.umich.edu} 5803113Sgblack@eecs.umich.edu 58111906SBrandon.Potter@amd.com// Here are a couple of convenience functions 5823113Sgblack@eecs.umich.edutemplate<class OS> 58312032Sandreas.sandberg@arm.comvoid 5848852Sandreas.hansson@arm.comcopyOutStatBuf(SETranslatingPortProxy &mem, Addr addr, 58511906SBrandon.Potter@amd.com hst_stat *host, bool fakeTTY = false) 5863113Sgblack@eecs.umich.edu{ 5873113Sgblack@eecs.umich.edu typedef TypedBufferArg<typename OS::tgt_stat> tgt_stat_buf; 5883113Sgblack@eecs.umich.edu tgt_stat_buf tgt(addr); 5893113Sgblack@eecs.umich.edu convertStatBuf<tgt_stat_buf, hst_stat>(tgt, host, fakeTTY); 5903113Sgblack@eecs.umich.edu tgt.copyOut(mem); 5913113Sgblack@eecs.umich.edu} 5923113Sgblack@eecs.umich.edu 5933113Sgblack@eecs.umich.edutemplate<class OS> 59412032Sandreas.sandberg@arm.comvoid 5958852Sandreas.hansson@arm.comcopyOutStat64Buf(SETranslatingPortProxy &mem, Addr addr, 59611906SBrandon.Potter@amd.com hst_stat64 *host, bool fakeTTY = false) 5973113Sgblack@eecs.umich.edu{ 5983113Sgblack@eecs.umich.edu typedef TypedBufferArg<typename OS::tgt_stat64> tgt_stat_buf; 5993113Sgblack@eecs.umich.edu tgt_stat_buf tgt(addr); 6006686Stjones1@inf.ed.ac.uk convertStat64Buf<tgt_stat_buf, hst_stat64>(tgt, host, fakeTTY); 6013113Sgblack@eecs.umich.edu tgt.copyOut(mem); 6023113Sgblack@eecs.umich.edu} 6033113Sgblack@eecs.umich.edu 60411759Sbrandon.potter@amd.comtemplate <class OS> 60512032Sandreas.sandberg@arm.comvoid 60611759Sbrandon.potter@amd.comcopyOutStatfsBuf(SETranslatingPortProxy &mem, Addr addr, 60711759Sbrandon.potter@amd.com hst_statfs *host) 60811759Sbrandon.potter@amd.com{ 60911759Sbrandon.potter@amd.com TypedBufferArg<typename OS::tgt_statfs> tgt(addr); 61011759Sbrandon.potter@amd.com 61111812Sbaz21@cam.ac.uk tgt->f_type = TheISA::htog(host->f_type); 61211812Sbaz21@cam.ac.uk#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) 61311812Sbaz21@cam.ac.uk tgt->f_bsize = TheISA::htog(host->f_iosize); 61411759Sbrandon.potter@amd.com#else 61511812Sbaz21@cam.ac.uk tgt->f_bsize = TheISA::htog(host->f_bsize); 61611759Sbrandon.potter@amd.com#endif 61711759Sbrandon.potter@amd.com tgt->f_blocks = TheISA::htog(host->f_blocks); 61811759Sbrandon.potter@amd.com tgt->f_bfree = TheISA::htog(host->f_bfree); 61911759Sbrandon.potter@amd.com tgt->f_bavail = TheISA::htog(host->f_bavail); 62011759Sbrandon.potter@amd.com tgt->f_files = TheISA::htog(host->f_files); 62111759Sbrandon.potter@amd.com tgt->f_ffree = TheISA::htog(host->f_ffree); 62211759Sbrandon.potter@amd.com memcpy(&tgt->f_fsid, &host->f_fsid, sizeof(host->f_fsid)); 62311812Sbaz21@cam.ac.uk#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) 62411812Sbaz21@cam.ac.uk tgt->f_namelen = TheISA::htog(host->f_namemax); 62511812Sbaz21@cam.ac.uk tgt->f_frsize = TheISA::htog(host->f_bsize); 62611812Sbaz21@cam.ac.uk#elif defined(__APPLE__) 62711812Sbaz21@cam.ac.uk tgt->f_namelen = 0; 62811812Sbaz21@cam.ac.uk tgt->f_frsize = 0; 62911812Sbaz21@cam.ac.uk#else 63011759Sbrandon.potter@amd.com tgt->f_namelen = TheISA::htog(host->f_namelen); 63111759Sbrandon.potter@amd.com tgt->f_frsize = TheISA::htog(host->f_frsize); 63211812Sbaz21@cam.ac.uk#endif 63311812Sbaz21@cam.ac.uk#if defined(__linux__) 63411759Sbrandon.potter@amd.com memcpy(&tgt->f_spare, &host->f_spare, sizeof(host->f_spare)); 63511812Sbaz21@cam.ac.uk#else 63611812Sbaz21@cam.ac.uk /* 63711812Sbaz21@cam.ac.uk * The fields are different sizes per OS. Don't bother with 63811812Sbaz21@cam.ac.uk * f_spare or f_reserved on non-Linux for now. 63911812Sbaz21@cam.ac.uk */ 64011812Sbaz21@cam.ac.uk memset(&tgt->f_spare, 0, sizeof(tgt->f_spare)); 64111812Sbaz21@cam.ac.uk#endif 64211759Sbrandon.potter@amd.com 64311759Sbrandon.potter@amd.com tgt.copyOut(mem); 64411759Sbrandon.potter@amd.com} 64511759Sbrandon.potter@amd.com 646378SN/A/// Target ioctl() handler. For the most part, programs call ioctl() 647378SN/A/// only to find out if their stdout is a tty, to determine whether to 6489141Smarc.orr@gmail.com/// do line or block buffering. We always claim that output fds are 6499141Smarc.orr@gmail.com/// not TTYs to provide repeatable results. 650360SN/Atemplate <class OS> 6511450SN/ASyscallReturn 65211856Sbrandon.potter@amd.comioctlFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 653360SN/A{ 6546701Sgblack@eecs.umich.edu int index = 0; 65511856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 65611856Sbrandon.potter@amd.com unsigned req = p->getSyscallArg(tc, index); 657360SN/A 65810930Sbrandon.potter@amd.com DPRINTF(SyscallVerbose, "ioctl(%d, 0x%x, ...)\n", tgt_fd, req); 659360SN/A 66011856Sbrandon.potter@amd.com if (OS::isTtyReq(req)) 66111856Sbrandon.potter@amd.com return -ENOTTY; 66210496Ssteve.reinhardt@amd.com 66311856Sbrandon.potter@amd.com auto dfdp = std::dynamic_pointer_cast<DeviceFDEntry>((*p->fds)[tgt_fd]); 66411856Sbrandon.potter@amd.com if (!dfdp) 6651458SN/A return -EBADF; 666360SN/A 66711856Sbrandon.potter@amd.com /** 66811856Sbrandon.potter@amd.com * If the driver is valid, issue the ioctl through it. Otherwise, 66911856Sbrandon.potter@amd.com * there's an implicit assumption that the device is a TTY type and we 67011856Sbrandon.potter@amd.com * return that we do not have a valid TTY. 67111856Sbrandon.potter@amd.com */ 67211856Sbrandon.potter@amd.com EmulatedDriver *emul_driver = dfdp->getDriver(); 67311856Sbrandon.potter@amd.com if (emul_driver) 67411856Sbrandon.potter@amd.com return emul_driver->ioctl(p, tc, req); 67510496Ssteve.reinhardt@amd.com 67611856Sbrandon.potter@amd.com /** 67711856Sbrandon.potter@amd.com * For lack of a better return code, return ENOTTY. Ideally, we should 67811856Sbrandon.potter@amd.com * return something better here, but at least we issue the warning. 67911856Sbrandon.potter@amd.com */ 68011856Sbrandon.potter@amd.com warn("Unsupported ioctl call (return ENOTTY): ioctl(%d, 0x%x, ...) @ \n", 68110930Sbrandon.potter@amd.com tgt_fd, req, tc->pcState()); 6829141Smarc.orr@gmail.com return -ENOTTY; 683360SN/A} 684360SN/A 685360SN/Atemplate <class OS> 68611907SBrandon.Potter@amd.comSyscallReturn 68711907SBrandon.Potter@amd.comopenImpl(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc, 68811907SBrandon.Potter@amd.com bool isopenat) 689360SN/A{ 69011907SBrandon.Potter@amd.com int index = 0; 69111907SBrandon.Potter@amd.com int tgt_dirfd = -1; 69211907SBrandon.Potter@amd.com 69311907SBrandon.Potter@amd.com /** 69411907SBrandon.Potter@amd.com * If using the openat variant, read in the target directory file 69511907SBrandon.Potter@amd.com * descriptor from the simulated process. 69611907SBrandon.Potter@amd.com */ 69711907SBrandon.Potter@amd.com if (isopenat) 69811907SBrandon.Potter@amd.com tgt_dirfd = p->getSyscallArg(tc, index); 69911907SBrandon.Potter@amd.com 70011907SBrandon.Potter@amd.com /** 70111907SBrandon.Potter@amd.com * Retrieve the simulated process' memory proxy and then read in the path 70211907SBrandon.Potter@amd.com * string from that memory space into the host's working memory space. 70311907SBrandon.Potter@amd.com */ 704360SN/A std::string path; 70511907SBrandon.Potter@amd.com if (!tc->getMemProxy().tryReadString(path, p->getSyscallArg(tc, index))) 7061458SN/A return -EFAULT; 707360SN/A 70811907SBrandon.Potter@amd.com#ifdef __CYGWIN32__ 70911907SBrandon.Potter@amd.com int host_flags = O_BINARY; 71011907SBrandon.Potter@amd.com#else 71111907SBrandon.Potter@amd.com int host_flags = 0; 71211907SBrandon.Potter@amd.com#endif 71311907SBrandon.Potter@amd.com /** 71411907SBrandon.Potter@amd.com * Translate target flags into host flags. Flags exist which are not 71511907SBrandon.Potter@amd.com * ported between architectures which can cause check failures. 71611907SBrandon.Potter@amd.com */ 71711907SBrandon.Potter@amd.com int tgt_flags = p->getSyscallArg(tc, index); 718360SN/A for (int i = 0; i < OS::NUM_OPEN_FLAGS; i++) { 71911907SBrandon.Potter@amd.com if (tgt_flags & OS::openFlagTable[i].tgtFlag) { 72011907SBrandon.Potter@amd.com tgt_flags &= ~OS::openFlagTable[i].tgtFlag; 72111907SBrandon.Potter@amd.com host_flags |= OS::openFlagTable[i].hostFlag; 722360SN/A } 723360SN/A } 72411907SBrandon.Potter@amd.com if (tgt_flags) { 72511907SBrandon.Potter@amd.com warn("open%s: cannot decode flags 0x%x", 72611907SBrandon.Potter@amd.com isopenat ? "at" : "", tgt_flags); 72711907SBrandon.Potter@amd.com } 728360SN/A#ifdef __CYGWIN32__ 72911907SBrandon.Potter@amd.com host_flags |= O_BINARY; 730360SN/A#endif 731360SN/A 73211907SBrandon.Potter@amd.com int mode = p->getSyscallArg(tc, index); 7333669Sbinkertn@umich.edu 73411907SBrandon.Potter@amd.com /** 73511907SBrandon.Potter@amd.com * If the simulated process called open or openat with AT_FDCWD specified, 73611907SBrandon.Potter@amd.com * take the current working directory value which was passed into the 73711907SBrandon.Potter@amd.com * process class as a Python parameter and append the current path to 73811907SBrandon.Potter@amd.com * create a full path. 73911907SBrandon.Potter@amd.com * Otherwise, openat with a valid target directory file descriptor has 74011907SBrandon.Potter@amd.com * been called. If the path option, which was passed in as a parameter, 74111907SBrandon.Potter@amd.com * is not absolute, retrieve the directory file descriptor's path and 74211907SBrandon.Potter@amd.com * prepend it to the path passed in as a parameter. 74311907SBrandon.Potter@amd.com * In every case, we should have a full path (which is relevant to the 74411907SBrandon.Potter@amd.com * host) to work with after this block has been passed. 74511907SBrandon.Potter@amd.com */ 74611907SBrandon.Potter@amd.com if (!isopenat || (isopenat && tgt_dirfd == OS::TGT_AT_FDCWD)) { 74711907SBrandon.Potter@amd.com path = p->fullPath(path); 74811907SBrandon.Potter@amd.com } else if (!startswith(path, "/")) { 74911907SBrandon.Potter@amd.com std::shared_ptr<FDEntry> fdep = ((*p->fds)[tgt_dirfd]); 75011907SBrandon.Potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(fdep); 75111907SBrandon.Potter@amd.com if (!ffdp) 75211907SBrandon.Potter@amd.com return -EBADF; 75313371Sciro.santilli@arm.com path.insert(0, ffdp->getFileName() + "/"); 75411907SBrandon.Potter@amd.com } 7551706SN/A 75611907SBrandon.Potter@amd.com /** 75711907SBrandon.Potter@amd.com * Since this is an emulated environment, we create pseudo file 75811907SBrandon.Potter@amd.com * descriptors for device requests that have been registered with 75911907SBrandon.Potter@amd.com * the process class through Python; this allows us to create a file 76011907SBrandon.Potter@amd.com * descriptor for subsequent ioctl or mmap calls. 76111907SBrandon.Potter@amd.com */ 76210496Ssteve.reinhardt@amd.com if (startswith(path, "/dev/")) { 76310496Ssteve.reinhardt@amd.com std::string filename = path.substr(strlen("/dev/")); 76411907SBrandon.Potter@amd.com EmulatedDriver *drv = p->findDriver(filename); 76511907SBrandon.Potter@amd.com if (drv) { 76611907SBrandon.Potter@amd.com DPRINTF_SYSCALL(Verbose, "open%s: passing call to " 76711907SBrandon.Potter@amd.com "driver open with path[%s]\n", 76811907SBrandon.Potter@amd.com isopenat ? "at" : "", path.c_str()); 76911907SBrandon.Potter@amd.com return drv->open(p, tc, mode, host_flags); 77010496Ssteve.reinhardt@amd.com } 77111907SBrandon.Potter@amd.com /** 77211907SBrandon.Potter@amd.com * Fall through here for pass through to host devices, such 77311907SBrandon.Potter@amd.com * as /dev/zero 77411907SBrandon.Potter@amd.com */ 77510496Ssteve.reinhardt@amd.com } 77610496Ssteve.reinhardt@amd.com 77711907SBrandon.Potter@amd.com /** 77811907SBrandon.Potter@amd.com * Some special paths and files cannot be called on the host and need 77911907SBrandon.Potter@amd.com * to be handled as special cases inside the simulator. 78011907SBrandon.Potter@amd.com * If the full path that was created above does not match any of the 78111907SBrandon.Potter@amd.com * special cases, pass it through to the open call on the host to let 78211907SBrandon.Potter@amd.com * the host open the file on our behalf. 78311907SBrandon.Potter@amd.com * If the host cannot open the file, return the host's error code back 78411907SBrandon.Potter@amd.com * through the system call to the simulated process. 78511907SBrandon.Potter@amd.com */ 78611907SBrandon.Potter@amd.com int sim_fd = -1; 78711907SBrandon.Potter@amd.com std::vector<std::string> special_paths = 78811907SBrandon.Potter@amd.com { "/proc/", "/system/", "/sys/", "/platform/", "/etc/passwd" }; 78911907SBrandon.Potter@amd.com for (auto entry : special_paths) { 79011907SBrandon.Potter@amd.com if (startswith(path, entry)) 79111907SBrandon.Potter@amd.com sim_fd = OS::openSpecialFile(path, p, tc); 79211907SBrandon.Potter@amd.com } 79311907SBrandon.Potter@amd.com if (sim_fd == -1) { 79411907SBrandon.Potter@amd.com sim_fd = open(path.c_str(), host_flags, mode); 79511907SBrandon.Potter@amd.com } 79611907SBrandon.Potter@amd.com if (sim_fd == -1) { 79711907SBrandon.Potter@amd.com int local = -errno; 79811907SBrandon.Potter@amd.com DPRINTF_SYSCALL(Verbose, "open%s: failed -> path:%s\n", 79911907SBrandon.Potter@amd.com isopenat ? "at" : "", path.c_str()); 80011907SBrandon.Potter@amd.com return local; 80111907SBrandon.Potter@amd.com } 802360SN/A 80311907SBrandon.Potter@amd.com /** 80411907SBrandon.Potter@amd.com * The file was opened successfully and needs to be recorded in the 80511907SBrandon.Potter@amd.com * process' file descriptor array so that it can be retrieved later. 80611907SBrandon.Potter@amd.com * The target file descriptor that is chosen will be the lowest unused 80711907SBrandon.Potter@amd.com * file descriptor. 80811907SBrandon.Potter@amd.com * Return the indirect target file descriptor back to the simulated 80911907SBrandon.Potter@amd.com * process to act as a handle for the opened file. 81011907SBrandon.Potter@amd.com */ 81111907SBrandon.Potter@amd.com auto ffdp = std::make_shared<FileFDEntry>(sim_fd, host_flags, path, 0); 81211907SBrandon.Potter@amd.com int tgt_fd = p->fds->allocFD(ffdp); 81311907SBrandon.Potter@amd.com DPRINTF_SYSCALL(Verbose, "open%s: sim_fd[%d], target_fd[%d] -> path:%s\n", 81411907SBrandon.Potter@amd.com isopenat ? "at" : "", sim_fd, tgt_fd, path.c_str()); 81511907SBrandon.Potter@amd.com return tgt_fd; 816360SN/A} 817360SN/A 81810027SChris.Adeniyi-Jones@arm.com/// Target open() handler. 81910027SChris.Adeniyi-Jones@arm.comtemplate <class OS> 82010027SChris.Adeniyi-Jones@arm.comSyscallReturn 82111851Sbrandon.potter@amd.comopenFunc(SyscallDesc *desc, int callnum, Process *process, 82210027SChris.Adeniyi-Jones@arm.com ThreadContext *tc) 82310027SChris.Adeniyi-Jones@arm.com{ 82411907SBrandon.Potter@amd.com return openImpl<OS>(desc, callnum, process, tc, false); 82510027SChris.Adeniyi-Jones@arm.com} 82610027SChris.Adeniyi-Jones@arm.com 82710027SChris.Adeniyi-Jones@arm.com/// Target openat() handler. 82810027SChris.Adeniyi-Jones@arm.comtemplate <class OS> 82910027SChris.Adeniyi-Jones@arm.comSyscallReturn 83011851Sbrandon.potter@amd.comopenatFunc(SyscallDesc *desc, int callnum, Process *process, 83111851Sbrandon.potter@amd.com ThreadContext *tc) 83210027SChris.Adeniyi-Jones@arm.com{ 83311907SBrandon.Potter@amd.com return openImpl<OS>(desc, callnum, process, tc, true); 83410027SChris.Adeniyi-Jones@arm.com} 83510027SChris.Adeniyi-Jones@arm.com 83610633Smichaelupton@gmail.com/// Target unlinkat() handler. 83710633Smichaelupton@gmail.comtemplate <class OS> 83810633Smichaelupton@gmail.comSyscallReturn 83911851Sbrandon.potter@amd.comunlinkatFunc(SyscallDesc *desc, int callnum, Process *process, 84010633Smichaelupton@gmail.com ThreadContext *tc) 84110633Smichaelupton@gmail.com{ 84210633Smichaelupton@gmail.com int index = 0; 84310633Smichaelupton@gmail.com int dirfd = process->getSyscallArg(tc, index); 84410633Smichaelupton@gmail.com if (dirfd != OS::TGT_AT_FDCWD) 84510633Smichaelupton@gmail.com warn("unlinkat: first argument not AT_FDCWD; unlikely to work"); 84610633Smichaelupton@gmail.com 84710633Smichaelupton@gmail.com return unlinkHelper(desc, callnum, process, tc, 1); 84810633Smichaelupton@gmail.com} 84910633Smichaelupton@gmail.com 85010203SAli.Saidi@ARM.com/// Target facessat() handler 85110203SAli.Saidi@ARM.comtemplate <class OS> 85210203SAli.Saidi@ARM.comSyscallReturn 85311851Sbrandon.potter@amd.comfaccessatFunc(SyscallDesc *desc, int callnum, Process *process, 85411851Sbrandon.potter@amd.com ThreadContext *tc) 85510203SAli.Saidi@ARM.com{ 85610203SAli.Saidi@ARM.com int index = 0; 85710203SAli.Saidi@ARM.com int dirfd = process->getSyscallArg(tc, index); 85810203SAli.Saidi@ARM.com if (dirfd != OS::TGT_AT_FDCWD) 85910203SAli.Saidi@ARM.com warn("faccessat: first argument not AT_FDCWD; unlikely to work"); 86010203SAli.Saidi@ARM.com return accessFunc(desc, callnum, process, tc, 1); 86110203SAli.Saidi@ARM.com} 86210203SAli.Saidi@ARM.com 86310203SAli.Saidi@ARM.com/// Target readlinkat() handler 86410203SAli.Saidi@ARM.comtemplate <class OS> 86510203SAli.Saidi@ARM.comSyscallReturn 86611851Sbrandon.potter@amd.comreadlinkatFunc(SyscallDesc *desc, int callnum, Process *process, 86711851Sbrandon.potter@amd.com ThreadContext *tc) 86810203SAli.Saidi@ARM.com{ 86910203SAli.Saidi@ARM.com int index = 0; 87010203SAli.Saidi@ARM.com int dirfd = process->getSyscallArg(tc, index); 87110203SAli.Saidi@ARM.com if (dirfd != OS::TGT_AT_FDCWD) 87210203SAli.Saidi@ARM.com warn("openat: first argument not AT_FDCWD; unlikely to work"); 87310203SAli.Saidi@ARM.com return readlinkFunc(desc, callnum, process, tc, 1); 87410203SAli.Saidi@ARM.com} 87510203SAli.Saidi@ARM.com 87610850SGiacomo.Gabrielli@arm.com/// Target renameat() handler. 87710850SGiacomo.Gabrielli@arm.comtemplate <class OS> 87810850SGiacomo.Gabrielli@arm.comSyscallReturn 87911851Sbrandon.potter@amd.comrenameatFunc(SyscallDesc *desc, int callnum, Process *process, 88010850SGiacomo.Gabrielli@arm.com ThreadContext *tc) 88110850SGiacomo.Gabrielli@arm.com{ 88210850SGiacomo.Gabrielli@arm.com int index = 0; 88310850SGiacomo.Gabrielli@arm.com 88410850SGiacomo.Gabrielli@arm.com int olddirfd = process->getSyscallArg(tc, index); 88510850SGiacomo.Gabrielli@arm.com if (olddirfd != OS::TGT_AT_FDCWD) 88610850SGiacomo.Gabrielli@arm.com warn("renameat: first argument not AT_FDCWD; unlikely to work"); 88710850SGiacomo.Gabrielli@arm.com 88810850SGiacomo.Gabrielli@arm.com std::string old_name; 88910850SGiacomo.Gabrielli@arm.com 89010850SGiacomo.Gabrielli@arm.com if (!tc->getMemProxy().tryReadString(old_name, 89110850SGiacomo.Gabrielli@arm.com process->getSyscallArg(tc, index))) 89210850SGiacomo.Gabrielli@arm.com return -EFAULT; 89310850SGiacomo.Gabrielli@arm.com 89410850SGiacomo.Gabrielli@arm.com int newdirfd = process->getSyscallArg(tc, index); 89510850SGiacomo.Gabrielli@arm.com if (newdirfd != OS::TGT_AT_FDCWD) 89610850SGiacomo.Gabrielli@arm.com warn("renameat: third argument not AT_FDCWD; unlikely to work"); 89710850SGiacomo.Gabrielli@arm.com 89810850SGiacomo.Gabrielli@arm.com std::string new_name; 89910850SGiacomo.Gabrielli@arm.com 90010850SGiacomo.Gabrielli@arm.com if (!tc->getMemProxy().tryReadString(new_name, 90110850SGiacomo.Gabrielli@arm.com process->getSyscallArg(tc, index))) 90210850SGiacomo.Gabrielli@arm.com return -EFAULT; 90310850SGiacomo.Gabrielli@arm.com 90410850SGiacomo.Gabrielli@arm.com // Adjust path for current working directory 90510850SGiacomo.Gabrielli@arm.com old_name = process->fullPath(old_name); 90610850SGiacomo.Gabrielli@arm.com new_name = process->fullPath(new_name); 90710850SGiacomo.Gabrielli@arm.com 90810850SGiacomo.Gabrielli@arm.com int result = rename(old_name.c_str(), new_name.c_str()); 90910850SGiacomo.Gabrielli@arm.com return (result == -1) ? -errno : result; 91010850SGiacomo.Gabrielli@arm.com} 91110850SGiacomo.Gabrielli@arm.com 9126640Svince@csl.cornell.edu/// Target sysinfo() handler. 9136640Svince@csl.cornell.edutemplate <class OS> 9146640Svince@csl.cornell.eduSyscallReturn 91511851Sbrandon.potter@amd.comsysinfoFunc(SyscallDesc *desc, int callnum, Process *process, 91611851Sbrandon.potter@amd.com ThreadContext *tc) 9176640Svince@csl.cornell.edu{ 9186640Svince@csl.cornell.edu 9196701Sgblack@eecs.umich.edu int index = 0; 9206701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::tgt_sysinfo> 92110793Sbrandon.potter@amd.com sysinfo(process->getSyscallArg(tc, index)); 9226640Svince@csl.cornell.edu 92311758Sbrandon.potter@amd.com sysinfo->uptime = seconds_since_epoch; 92411758Sbrandon.potter@amd.com sysinfo->totalram = process->system->memSize(); 92511758Sbrandon.potter@amd.com sysinfo->mem_unit = 1; 9266640Svince@csl.cornell.edu 9278706Sandreas.hansson@arm.com sysinfo.copyOut(tc->getMemProxy()); 9286640Svince@csl.cornell.edu 9296701Sgblack@eecs.umich.edu return 0; 9306640Svince@csl.cornell.edu} 931360SN/A 9321999SN/A/// Target chmod() handler. 9331999SN/Atemplate <class OS> 9341999SN/ASyscallReturn 93511851Sbrandon.potter@amd.comchmodFunc(SyscallDesc *desc, int callnum, Process *process, 9362680Sktlim@umich.edu ThreadContext *tc) 9371999SN/A{ 9381999SN/A std::string path; 9391999SN/A 9406701Sgblack@eecs.umich.edu int index = 0; 9418852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 9426701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 9431999SN/A return -EFAULT; 9446701Sgblack@eecs.umich.edu } 9451999SN/A 9466701Sgblack@eecs.umich.edu uint32_t mode = process->getSyscallArg(tc, index); 9471999SN/A mode_t hostMode = 0; 9481999SN/A 9491999SN/A // XXX translate mode flags via OS::something??? 9501999SN/A hostMode = mode; 9511999SN/A 9523669Sbinkertn@umich.edu // Adjust path for current working directory 9533669Sbinkertn@umich.edu path = process->fullPath(path); 9543669Sbinkertn@umich.edu 9551999SN/A // do the chmod 9561999SN/A int result = chmod(path.c_str(), hostMode); 9571999SN/A if (result < 0) 9582218SN/A return -errno; 9591999SN/A 9601999SN/A return 0; 9611999SN/A} 9621999SN/A 96313570Sbrandon.potter@amd.comtemplate <class OS> 96413570Sbrandon.potter@amd.comSyscallReturn 96513570Sbrandon.potter@amd.compollFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 96613570Sbrandon.potter@amd.com{ 96713570Sbrandon.potter@amd.com int index = 0; 96813570Sbrandon.potter@amd.com Addr fdsPtr = p->getSyscallArg(tc, index); 96913570Sbrandon.potter@amd.com int nfds = p->getSyscallArg(tc, index); 97013570Sbrandon.potter@amd.com int tmout = p->getSyscallArg(tc, index); 97113570Sbrandon.potter@amd.com 97213570Sbrandon.potter@amd.com BufferArg fdsBuf(fdsPtr, sizeof(struct pollfd) * nfds); 97313570Sbrandon.potter@amd.com fdsBuf.copyIn(tc->getMemProxy()); 97413570Sbrandon.potter@amd.com 97513570Sbrandon.potter@amd.com /** 97613570Sbrandon.potter@amd.com * Record the target file descriptors in a local variable. We need to 97713570Sbrandon.potter@amd.com * replace them with host file descriptors but we need a temporary copy 97813570Sbrandon.potter@amd.com * for later. Afterwards, replace each target file descriptor in the 97913570Sbrandon.potter@amd.com * poll_fd array with its host_fd. 98013570Sbrandon.potter@amd.com */ 98113570Sbrandon.potter@amd.com int temp_tgt_fds[nfds]; 98213570Sbrandon.potter@amd.com for (index = 0; index < nfds; index++) { 98313570Sbrandon.potter@amd.com temp_tgt_fds[index] = ((struct pollfd *)fdsBuf.bufferPtr())[index].fd; 98413570Sbrandon.potter@amd.com auto tgt_fd = temp_tgt_fds[index]; 98513570Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 98613570Sbrandon.potter@amd.com if (!hbfdp) 98713570Sbrandon.potter@amd.com return -EBADF; 98813570Sbrandon.potter@amd.com auto host_fd = hbfdp->getSimFD(); 98913570Sbrandon.potter@amd.com ((struct pollfd *)fdsBuf.bufferPtr())[index].fd = host_fd; 99013570Sbrandon.potter@amd.com } 99113570Sbrandon.potter@amd.com 99213570Sbrandon.potter@amd.com /** 99313570Sbrandon.potter@amd.com * We cannot allow an infinite poll to occur or it will inevitably cause 99413570Sbrandon.potter@amd.com * a deadlock in the gem5 simulator with clone. We must pass in tmout with 99513570Sbrandon.potter@amd.com * a non-negative value, however it also makes no sense to poll on the 99613570Sbrandon.potter@amd.com * underlying host for any other time than tmout a zero timeout. 99713570Sbrandon.potter@amd.com */ 99813570Sbrandon.potter@amd.com int status; 99913570Sbrandon.potter@amd.com if (tmout < 0) { 100013570Sbrandon.potter@amd.com status = poll((struct pollfd *)fdsBuf.bufferPtr(), nfds, 0); 100113570Sbrandon.potter@amd.com if (status == 0) { 100213570Sbrandon.potter@amd.com /** 100313570Sbrandon.potter@amd.com * If blocking indefinitely, check the signal list to see if a 100413570Sbrandon.potter@amd.com * signal would break the poll out of the retry cycle and try 100513570Sbrandon.potter@amd.com * to return the signal interrupt instead. 100613570Sbrandon.potter@amd.com */ 100713570Sbrandon.potter@amd.com System *sysh = tc->getSystemPtr(); 100813570Sbrandon.potter@amd.com std::list<BasicSignal>::iterator it; 100913570Sbrandon.potter@amd.com for (it=sysh->signalList.begin(); it!=sysh->signalList.end(); it++) 101013570Sbrandon.potter@amd.com if (it->receiver == p) 101113570Sbrandon.potter@amd.com return -EINTR; 101213570Sbrandon.potter@amd.com return SyscallReturn::retry(); 101313570Sbrandon.potter@amd.com } 101413570Sbrandon.potter@amd.com } else 101513570Sbrandon.potter@amd.com status = poll((struct pollfd *)fdsBuf.bufferPtr(), nfds, 0); 101613570Sbrandon.potter@amd.com 101713570Sbrandon.potter@amd.com if (status == -1) 101813570Sbrandon.potter@amd.com return -errno; 101913570Sbrandon.potter@amd.com 102013570Sbrandon.potter@amd.com /** 102113570Sbrandon.potter@amd.com * Replace each host_fd in the returned poll_fd array with its original 102213570Sbrandon.potter@amd.com * target file descriptor. 102313570Sbrandon.potter@amd.com */ 102413570Sbrandon.potter@amd.com for (index = 0; index < nfds; index++) { 102513570Sbrandon.potter@amd.com auto tgt_fd = temp_tgt_fds[index]; 102613570Sbrandon.potter@amd.com ((struct pollfd *)fdsBuf.bufferPtr())[index].fd = tgt_fd; 102713570Sbrandon.potter@amd.com } 102813570Sbrandon.potter@amd.com 102913570Sbrandon.potter@amd.com /** 103013570Sbrandon.potter@amd.com * Copy out the pollfd struct because the host may have updated fields 103113570Sbrandon.potter@amd.com * in the structure. 103213570Sbrandon.potter@amd.com */ 103313570Sbrandon.potter@amd.com fdsBuf.copyOut(tc->getMemProxy()); 103413570Sbrandon.potter@amd.com 103513570Sbrandon.potter@amd.com return status; 103613570Sbrandon.potter@amd.com} 10371999SN/A 10381999SN/A/// Target fchmod() handler. 10391999SN/Atemplate <class OS> 10401999SN/ASyscallReturn 104111856Sbrandon.potter@amd.comfchmodFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 10421999SN/A{ 10436701Sgblack@eecs.umich.edu int index = 0; 104411856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 104511856Sbrandon.potter@amd.com uint32_t mode = p->getSyscallArg(tc, index); 104610931Sbrandon.potter@amd.com 104711856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 104811856Sbrandon.potter@amd.com if (!ffdp) 10491999SN/A return -EBADF; 105011856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 10511999SN/A 105211856Sbrandon.potter@amd.com mode_t hostMode = mode; 10531999SN/A 105411856Sbrandon.potter@amd.com int result = fchmod(sim_fd, hostMode); 10551999SN/A 105611856Sbrandon.potter@amd.com return (result < 0) ? -errno : 0; 10571999SN/A} 10581999SN/A 10595877Shsul@eecs.umich.edu/// Target mremap() handler. 10605877Shsul@eecs.umich.edutemplate <class OS> 10615877Shsul@eecs.umich.eduSyscallReturn 106211851Sbrandon.potter@amd.commremapFunc(SyscallDesc *desc, int callnum, Process *process, ThreadContext *tc) 10635877Shsul@eecs.umich.edu{ 10646701Sgblack@eecs.umich.edu int index = 0; 10656701Sgblack@eecs.umich.edu Addr start = process->getSyscallArg(tc, index); 10666701Sgblack@eecs.umich.edu uint64_t old_length = process->getSyscallArg(tc, index); 10676701Sgblack@eecs.umich.edu uint64_t new_length = process->getSyscallArg(tc, index); 10686701Sgblack@eecs.umich.edu uint64_t flags = process->getSyscallArg(tc, index); 106910027SChris.Adeniyi-Jones@arm.com uint64_t provided_address = 0; 107010027SChris.Adeniyi-Jones@arm.com bool use_provided_address = flags & OS::TGT_MREMAP_FIXED; 107110027SChris.Adeniyi-Jones@arm.com 107210027SChris.Adeniyi-Jones@arm.com if (use_provided_address) 107310027SChris.Adeniyi-Jones@arm.com provided_address = process->getSyscallArg(tc, index); 10745877Shsul@eecs.umich.edu 107510318Sandreas.hansson@arm.com if ((start % TheISA::PageBytes != 0) || 107610318Sandreas.hansson@arm.com (provided_address % TheISA::PageBytes != 0)) { 10775877Shsul@eecs.umich.edu warn("mremap failing: arguments not page aligned"); 10785877Shsul@eecs.umich.edu return -EINVAL; 10795877Shsul@eecs.umich.edu } 10805877Shsul@eecs.umich.edu 108110486Stjablin@gmail.com new_length = roundUp(new_length, TheISA::PageBytes); 108210486Stjablin@gmail.com 10835877Shsul@eecs.umich.edu if (new_length > old_length) { 108411905SBrandon.Potter@amd.com std::shared_ptr<MemState> mem_state = process->memState; 108511905SBrandon.Potter@amd.com Addr mmap_end = mem_state->getMmapEnd(); 108611905SBrandon.Potter@amd.com 108711905SBrandon.Potter@amd.com if ((start + old_length) == mmap_end && 108810027SChris.Adeniyi-Jones@arm.com (!use_provided_address || provided_address == start)) { 108912206Srico.amslinger@informatik.uni-augsburg.de // This case cannot occur when growing downward, as 109012206Srico.amslinger@informatik.uni-augsburg.de // start is greater than or equal to mmap_end. 10915877Shsul@eecs.umich.edu uint64_t diff = new_length - old_length; 109211905SBrandon.Potter@amd.com process->allocateMem(mmap_end, diff); 109311905SBrandon.Potter@amd.com mem_state->setMmapEnd(mmap_end + diff); 10945877Shsul@eecs.umich.edu return start; 10955877Shsul@eecs.umich.edu } else { 109610027SChris.Adeniyi-Jones@arm.com if (!use_provided_address && !(flags & OS::TGT_MREMAP_MAYMOVE)) { 10975877Shsul@eecs.umich.edu warn("can't remap here and MREMAP_MAYMOVE flag not set\n"); 10985877Shsul@eecs.umich.edu return -ENOMEM; 10995877Shsul@eecs.umich.edu } else { 110012206Srico.amslinger@informatik.uni-augsburg.de uint64_t new_start = provided_address; 110112206Srico.amslinger@informatik.uni-augsburg.de if (!use_provided_address) { 110212206Srico.amslinger@informatik.uni-augsburg.de new_start = process->mmapGrowsDown() ? 110312206Srico.amslinger@informatik.uni-augsburg.de mmap_end - new_length : mmap_end; 110412206Srico.amslinger@informatik.uni-augsburg.de mmap_end = process->mmapGrowsDown() ? 110512206Srico.amslinger@informatik.uni-augsburg.de new_start : mmap_end + new_length; 110612206Srico.amslinger@informatik.uni-augsburg.de mem_state->setMmapEnd(mmap_end); 110712206Srico.amslinger@informatik.uni-augsburg.de } 110812206Srico.amslinger@informatik.uni-augsburg.de 110910027SChris.Adeniyi-Jones@arm.com process->pTable->remap(start, old_length, new_start); 111010027SChris.Adeniyi-Jones@arm.com warn("mremapping to new vaddr %08p-%08p, adding %d\n", 111110027SChris.Adeniyi-Jones@arm.com new_start, new_start + new_length, 111210027SChris.Adeniyi-Jones@arm.com new_length - old_length); 11135877Shsul@eecs.umich.edu // add on the remaining unallocated pages 111410027SChris.Adeniyi-Jones@arm.com process->allocateMem(new_start + old_length, 111510027SChris.Adeniyi-Jones@arm.com new_length - old_length, 111610027SChris.Adeniyi-Jones@arm.com use_provided_address /* clobber */); 111710027SChris.Adeniyi-Jones@arm.com if (use_provided_address && 111812206Srico.amslinger@informatik.uni-augsburg.de ((new_start + new_length > mem_state->getMmapEnd() && 111912206Srico.amslinger@informatik.uni-augsburg.de !process->mmapGrowsDown()) || 112012206Srico.amslinger@informatik.uni-augsburg.de (new_start < mem_state->getMmapEnd() && 112112206Srico.amslinger@informatik.uni-augsburg.de process->mmapGrowsDown()))) { 112210027SChris.Adeniyi-Jones@arm.com // something fishy going on here, at least notify the user 112310027SChris.Adeniyi-Jones@arm.com // @todo: increase mmap_end? 112410027SChris.Adeniyi-Jones@arm.com warn("mmap region limit exceeded with MREMAP_FIXED\n"); 112510027SChris.Adeniyi-Jones@arm.com } 112610027SChris.Adeniyi-Jones@arm.com warn("returning %08p as start\n", new_start); 112710027SChris.Adeniyi-Jones@arm.com return new_start; 11285877Shsul@eecs.umich.edu } 11295877Shsul@eecs.umich.edu } 11305877Shsul@eecs.umich.edu } else { 113110027SChris.Adeniyi-Jones@arm.com if (use_provided_address && provided_address != start) 113210027SChris.Adeniyi-Jones@arm.com process->pTable->remap(start, new_length, provided_address); 11338601Ssteve.reinhardt@amd.com process->pTable->unmap(start + new_length, old_length - new_length); 113410027SChris.Adeniyi-Jones@arm.com return use_provided_address ? provided_address : start; 11355877Shsul@eecs.umich.edu } 11365877Shsul@eecs.umich.edu} 11371999SN/A 1138378SN/A/// Target stat() handler. 1139360SN/Atemplate <class OS> 11401450SN/ASyscallReturn 114111851Sbrandon.potter@amd.comstatFunc(SyscallDesc *desc, int callnum, Process *process, 11422680Sktlim@umich.edu ThreadContext *tc) 1143360SN/A{ 1144360SN/A std::string path; 1145360SN/A 11466701Sgblack@eecs.umich.edu int index = 0; 11478852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 11486701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 11496701Sgblack@eecs.umich.edu return -EFAULT; 11506701Sgblack@eecs.umich.edu } 11516701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 1152360SN/A 11533669Sbinkertn@umich.edu // Adjust path for current working directory 11543669Sbinkertn@umich.edu path = process->fullPath(path); 11553669Sbinkertn@umich.edu 1156360SN/A struct stat hostBuf; 1157360SN/A int result = stat(path.c_str(), &hostBuf); 1158360SN/A 1159360SN/A if (result < 0) 11602218SN/A return -errno; 1161360SN/A 11628706Sandreas.hansson@arm.com copyOutStatBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 1163360SN/A 11641458SN/A return 0; 1165360SN/A} 1166360SN/A 1167360SN/A 11685074Ssaidi@eecs.umich.edu/// Target stat64() handler. 11695074Ssaidi@eecs.umich.edutemplate <class OS> 11705074Ssaidi@eecs.umich.eduSyscallReturn 117111851Sbrandon.potter@amd.comstat64Func(SyscallDesc *desc, int callnum, Process *process, 11725074Ssaidi@eecs.umich.edu ThreadContext *tc) 11735074Ssaidi@eecs.umich.edu{ 11745074Ssaidi@eecs.umich.edu std::string path; 11755074Ssaidi@eecs.umich.edu 11766701Sgblack@eecs.umich.edu int index = 0; 11778852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 11786701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) 11795074Ssaidi@eecs.umich.edu return -EFAULT; 11806701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 11815074Ssaidi@eecs.umich.edu 11825074Ssaidi@eecs.umich.edu // Adjust path for current working directory 11835074Ssaidi@eecs.umich.edu path = process->fullPath(path); 11845074Ssaidi@eecs.umich.edu 11855208Ssaidi@eecs.umich.edu#if NO_STAT64 11865208Ssaidi@eecs.umich.edu struct stat hostBuf; 11875208Ssaidi@eecs.umich.edu int result = stat(path.c_str(), &hostBuf); 11885208Ssaidi@eecs.umich.edu#else 11895074Ssaidi@eecs.umich.edu struct stat64 hostBuf; 11905074Ssaidi@eecs.umich.edu int result = stat64(path.c_str(), &hostBuf); 11915208Ssaidi@eecs.umich.edu#endif 11925074Ssaidi@eecs.umich.edu 11935074Ssaidi@eecs.umich.edu if (result < 0) 11945074Ssaidi@eecs.umich.edu return -errno; 11955074Ssaidi@eecs.umich.edu 11968706Sandreas.hansson@arm.com copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 11975074Ssaidi@eecs.umich.edu 11985074Ssaidi@eecs.umich.edu return 0; 11995074Ssaidi@eecs.umich.edu} 12005074Ssaidi@eecs.umich.edu 12015074Ssaidi@eecs.umich.edu 120210027SChris.Adeniyi-Jones@arm.com/// Target fstatat64() handler. 120310027SChris.Adeniyi-Jones@arm.comtemplate <class OS> 120410027SChris.Adeniyi-Jones@arm.comSyscallReturn 120511851Sbrandon.potter@amd.comfstatat64Func(SyscallDesc *desc, int callnum, Process *process, 120610027SChris.Adeniyi-Jones@arm.com ThreadContext *tc) 120710027SChris.Adeniyi-Jones@arm.com{ 120810027SChris.Adeniyi-Jones@arm.com int index = 0; 120910027SChris.Adeniyi-Jones@arm.com int dirfd = process->getSyscallArg(tc, index); 121010027SChris.Adeniyi-Jones@arm.com if (dirfd != OS::TGT_AT_FDCWD) 121110793Sbrandon.potter@amd.com warn("fstatat64: first argument not AT_FDCWD; unlikely to work"); 121210027SChris.Adeniyi-Jones@arm.com 121310027SChris.Adeniyi-Jones@arm.com std::string path; 121410027SChris.Adeniyi-Jones@arm.com if (!tc->getMemProxy().tryReadString(path, 121510027SChris.Adeniyi-Jones@arm.com process->getSyscallArg(tc, index))) 121610027SChris.Adeniyi-Jones@arm.com return -EFAULT; 121710027SChris.Adeniyi-Jones@arm.com Addr bufPtr = process->getSyscallArg(tc, index); 121810027SChris.Adeniyi-Jones@arm.com 121910027SChris.Adeniyi-Jones@arm.com // Adjust path for current working directory 122010027SChris.Adeniyi-Jones@arm.com path = process->fullPath(path); 122110027SChris.Adeniyi-Jones@arm.com 122210027SChris.Adeniyi-Jones@arm.com#if NO_STAT64 122310027SChris.Adeniyi-Jones@arm.com struct stat hostBuf; 122410027SChris.Adeniyi-Jones@arm.com int result = stat(path.c_str(), &hostBuf); 122510027SChris.Adeniyi-Jones@arm.com#else 122610027SChris.Adeniyi-Jones@arm.com struct stat64 hostBuf; 122710027SChris.Adeniyi-Jones@arm.com int result = stat64(path.c_str(), &hostBuf); 122810027SChris.Adeniyi-Jones@arm.com#endif 122910027SChris.Adeniyi-Jones@arm.com 123010027SChris.Adeniyi-Jones@arm.com if (result < 0) 123110027SChris.Adeniyi-Jones@arm.com return -errno; 123210027SChris.Adeniyi-Jones@arm.com 123310027SChris.Adeniyi-Jones@arm.com copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 123410027SChris.Adeniyi-Jones@arm.com 123510027SChris.Adeniyi-Jones@arm.com return 0; 123610027SChris.Adeniyi-Jones@arm.com} 123710027SChris.Adeniyi-Jones@arm.com 123810027SChris.Adeniyi-Jones@arm.com 12391999SN/A/// Target fstat64() handler. 12401999SN/Atemplate <class OS> 12411999SN/ASyscallReturn 124211856Sbrandon.potter@amd.comfstat64Func(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 12431999SN/A{ 12446701Sgblack@eecs.umich.edu int index = 0; 124511856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 124611856Sbrandon.potter@amd.com Addr bufPtr = p->getSyscallArg(tc, index); 124710931Sbrandon.potter@amd.com 124811856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 124911856Sbrandon.potter@amd.com if (!ffdp) 12501999SN/A return -EBADF; 125111856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 12521999SN/A 12532764Sstever@eecs.umich.edu#if NO_STAT64 12542064SN/A struct stat hostBuf; 125510931Sbrandon.potter@amd.com int result = fstat(sim_fd, &hostBuf); 12562064SN/A#else 12572064SN/A struct stat64 hostBuf; 125810931Sbrandon.potter@amd.com int result = fstat64(sim_fd, &hostBuf); 12592064SN/A#endif 12601999SN/A 12611999SN/A if (result < 0) 12622218SN/A return -errno; 12631999SN/A 126410931Sbrandon.potter@amd.com copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf, (sim_fd == 1)); 12651999SN/A 12661999SN/A return 0; 12671999SN/A} 12681999SN/A 12691999SN/A 1270378SN/A/// Target lstat() handler. 1271360SN/Atemplate <class OS> 12721450SN/ASyscallReturn 127311851Sbrandon.potter@amd.comlstatFunc(SyscallDesc *desc, int callnum, Process *process, 12742680Sktlim@umich.edu ThreadContext *tc) 1275360SN/A{ 1276360SN/A std::string path; 1277360SN/A 12786701Sgblack@eecs.umich.edu int index = 0; 12798852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 12806701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 12816701Sgblack@eecs.umich.edu return -EFAULT; 12826701Sgblack@eecs.umich.edu } 12836701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 1284360SN/A 12853669Sbinkertn@umich.edu // Adjust path for current working directory 12863669Sbinkertn@umich.edu path = process->fullPath(path); 12873669Sbinkertn@umich.edu 1288360SN/A struct stat hostBuf; 1289360SN/A int result = lstat(path.c_str(), &hostBuf); 1290360SN/A 1291360SN/A if (result < 0) 12921458SN/A return -errno; 1293360SN/A 12948706Sandreas.hansson@arm.com copyOutStatBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 1295360SN/A 12961458SN/A return 0; 1297360SN/A} 1298360SN/A 12991999SN/A/// Target lstat64() handler. 13001999SN/Atemplate <class OS> 13011999SN/ASyscallReturn 130211851Sbrandon.potter@amd.comlstat64Func(SyscallDesc *desc, int callnum, Process *process, 13032680Sktlim@umich.edu ThreadContext *tc) 13041999SN/A{ 13051999SN/A std::string path; 13061999SN/A 13076701Sgblack@eecs.umich.edu int index = 0; 13088852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 13096701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 13106701Sgblack@eecs.umich.edu return -EFAULT; 13116701Sgblack@eecs.umich.edu } 13126701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 13131999SN/A 13143669Sbinkertn@umich.edu // Adjust path for current working directory 13153669Sbinkertn@umich.edu path = process->fullPath(path); 13163669Sbinkertn@umich.edu 13172764Sstever@eecs.umich.edu#if NO_STAT64 13182064SN/A struct stat hostBuf; 13192064SN/A int result = lstat(path.c_str(), &hostBuf); 13202064SN/A#else 13211999SN/A struct stat64 hostBuf; 13221999SN/A int result = lstat64(path.c_str(), &hostBuf); 13232064SN/A#endif 13241999SN/A 13251999SN/A if (result < 0) 13261999SN/A return -errno; 13271999SN/A 13288706Sandreas.hansson@arm.com copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 13291999SN/A 13301999SN/A return 0; 13311999SN/A} 13321999SN/A 1333378SN/A/// Target fstat() handler. 1334360SN/Atemplate <class OS> 13351450SN/ASyscallReturn 133611856Sbrandon.potter@amd.comfstatFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 1337360SN/A{ 13386701Sgblack@eecs.umich.edu int index = 0; 133911856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 134011856Sbrandon.potter@amd.com Addr bufPtr = p->getSyscallArg(tc, index); 1341360SN/A 134211380Salexandru.dutu@amd.com DPRINTF_SYSCALL(Verbose, "fstat(%d, ...)\n", tgt_fd); 1343360SN/A 134411856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 134511856Sbrandon.potter@amd.com if (!ffdp) 13461458SN/A return -EBADF; 134711856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 1348360SN/A 1349360SN/A struct stat hostBuf; 135010931Sbrandon.potter@amd.com int result = fstat(sim_fd, &hostBuf); 1351360SN/A 1352360SN/A if (result < 0) 13531458SN/A return -errno; 1354360SN/A 135510931Sbrandon.potter@amd.com copyOutStatBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf, (sim_fd == 1)); 13562021SN/A 13571458SN/A return 0; 1358360SN/A} 1359360SN/A 13601706SN/A/// Target statfs() handler. 13611706SN/Atemplate <class OS> 13621706SN/ASyscallReturn 136311851Sbrandon.potter@amd.comstatfsFunc(SyscallDesc *desc, int callnum, Process *process, 13642680Sktlim@umich.edu ThreadContext *tc) 13651706SN/A{ 136611799Sbrandon.potter@amd.com#if NO_STATFS 136711799Sbrandon.potter@amd.com warn("Host OS cannot support calls to statfs. Ignoring syscall"); 136811799Sbrandon.potter@amd.com#else 13691706SN/A std::string path; 13701706SN/A 13716701Sgblack@eecs.umich.edu int index = 0; 13728852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 13736701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 13746701Sgblack@eecs.umich.edu return -EFAULT; 13756701Sgblack@eecs.umich.edu } 13766701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 13771706SN/A 13783669Sbinkertn@umich.edu // Adjust path for current working directory 13793669Sbinkertn@umich.edu path = process->fullPath(path); 13803669Sbinkertn@umich.edu 13811706SN/A struct statfs hostBuf; 13821706SN/A int result = statfs(path.c_str(), &hostBuf); 13831706SN/A 13841706SN/A if (result < 0) 13852218SN/A return -errno; 13861706SN/A 138711759Sbrandon.potter@amd.com copyOutStatfsBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 138811799Sbrandon.potter@amd.com#endif 13891706SN/A return 0; 13901706SN/A} 13911706SN/A 139211886Sbrandon.potter@amd.comtemplate <class OS> 139311886Sbrandon.potter@amd.comSyscallReturn 139411886Sbrandon.potter@amd.comcloneFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 139511886Sbrandon.potter@amd.com{ 139611886Sbrandon.potter@amd.com int index = 0; 139712426Sqtt2@cornell.edu 139813557Sgabeblack@google.com RegVal flags = p->getSyscallArg(tc, index); 139913557Sgabeblack@google.com RegVal newStack = p->getSyscallArg(tc, index); 140011886Sbrandon.potter@amd.com Addr ptidPtr = p->getSyscallArg(tc, index); 140112426Sqtt2@cornell.edu 140213534Sandreas.sandberg@arm.com#if THE_ISA == RISCV_ISA or THE_ISA == ARM_ISA 140312426Sqtt2@cornell.edu /** 140413534Sandreas.sandberg@arm.com * Linux sets CLONE_BACKWARDS flag for RISC-V and Arm. 140512426Sqtt2@cornell.edu * The flag defines the list of clone() arguments in the following 140612426Sqtt2@cornell.edu * order: flags -> newStack -> ptidPtr -> tlsPtr -> ctidPtr 140712426Sqtt2@cornell.edu */ 140813536Sandreas.sandberg@arm.com Addr tlsPtr = p->getSyscallArg(tc, index); 140912426Sqtt2@cornell.edu Addr ctidPtr = p->getSyscallArg(tc, index); 141012426Sqtt2@cornell.edu#else 141111886Sbrandon.potter@amd.com Addr ctidPtr = p->getSyscallArg(tc, index); 141213536Sandreas.sandberg@arm.com Addr tlsPtr = p->getSyscallArg(tc, index); 141312426Sqtt2@cornell.edu#endif 141411886Sbrandon.potter@amd.com 141511886Sbrandon.potter@amd.com if (((flags & OS::TGT_CLONE_SIGHAND)&& !(flags & OS::TGT_CLONE_VM)) || 141611886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_THREAD) && !(flags & OS::TGT_CLONE_SIGHAND)) || 141711886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_FS) && (flags & OS::TGT_CLONE_NEWNS)) || 141811886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_NEWIPC) && (flags & OS::TGT_CLONE_SYSVSEM)) || 141911886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_NEWPID) && (flags & OS::TGT_CLONE_THREAD)) || 142011886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_VM) && !(newStack))) 142111886Sbrandon.potter@amd.com return -EINVAL; 142211886Sbrandon.potter@amd.com 142311886Sbrandon.potter@amd.com ThreadContext *ctc; 142411886Sbrandon.potter@amd.com if (!(ctc = p->findFreeContext())) 142511886Sbrandon.potter@amd.com fatal("clone: no spare thread context in system"); 142611886Sbrandon.potter@amd.com 142711886Sbrandon.potter@amd.com /** 142811886Sbrandon.potter@amd.com * Note that ProcessParams is generated by swig and there are no other 142911886Sbrandon.potter@amd.com * examples of how to create anything but this default constructor. The 143011886Sbrandon.potter@amd.com * fields are manually initialized instead of passing parameters to the 143111886Sbrandon.potter@amd.com * constructor. 143211886Sbrandon.potter@amd.com */ 143311886Sbrandon.potter@amd.com ProcessParams *pp = new ProcessParams(); 143411886Sbrandon.potter@amd.com pp->executable.assign(*(new std::string(p->progName()))); 143511886Sbrandon.potter@amd.com pp->cmd.push_back(*(new std::string(p->progName()))); 143611886Sbrandon.potter@amd.com pp->system = p->system; 143711886Sbrandon.potter@amd.com pp->cwd.assign(p->getcwd()); 143811886Sbrandon.potter@amd.com pp->input.assign("stdin"); 143911886Sbrandon.potter@amd.com pp->output.assign("stdout"); 144011886Sbrandon.potter@amd.com pp->errout.assign("stderr"); 144111886Sbrandon.potter@amd.com pp->uid = p->uid(); 144211886Sbrandon.potter@amd.com pp->euid = p->euid(); 144311886Sbrandon.potter@amd.com pp->gid = p->gid(); 144411886Sbrandon.potter@amd.com pp->egid = p->egid(); 144511886Sbrandon.potter@amd.com 144611886Sbrandon.potter@amd.com /* Find the first free PID that's less than the maximum */ 144711886Sbrandon.potter@amd.com std::set<int> const& pids = p->system->PIDs; 144811886Sbrandon.potter@amd.com int temp_pid = *pids.begin(); 144911886Sbrandon.potter@amd.com do { 145011886Sbrandon.potter@amd.com temp_pid++; 145111886Sbrandon.potter@amd.com } while (pids.find(temp_pid) != pids.end()); 145211886Sbrandon.potter@amd.com if (temp_pid >= System::maxPID) 145311886Sbrandon.potter@amd.com fatal("temp_pid is too large: %d", temp_pid); 145411886Sbrandon.potter@amd.com 145511886Sbrandon.potter@amd.com pp->pid = temp_pid; 145611886Sbrandon.potter@amd.com pp->ppid = (flags & OS::TGT_CLONE_THREAD) ? p->ppid() : p->pid(); 145711886Sbrandon.potter@amd.com Process *cp = pp->create(); 145811886Sbrandon.potter@amd.com delete pp; 145911886Sbrandon.potter@amd.com 146011886Sbrandon.potter@amd.com Process *owner = ctc->getProcessPtr(); 146111886Sbrandon.potter@amd.com ctc->setProcessPtr(cp); 146211886Sbrandon.potter@amd.com cp->assignThreadContext(ctc->contextId()); 146311886Sbrandon.potter@amd.com owner->revokeThreadContext(ctc->contextId()); 146411886Sbrandon.potter@amd.com 146511886Sbrandon.potter@amd.com if (flags & OS::TGT_CLONE_PARENT_SETTID) { 146611886Sbrandon.potter@amd.com BufferArg ptidBuf(ptidPtr, sizeof(long)); 146711886Sbrandon.potter@amd.com long *ptid = (long *)ptidBuf.bufferPtr(); 146811886Sbrandon.potter@amd.com *ptid = cp->pid(); 146911886Sbrandon.potter@amd.com ptidBuf.copyOut(tc->getMemProxy()); 147011886Sbrandon.potter@amd.com } 147111886Sbrandon.potter@amd.com 147211886Sbrandon.potter@amd.com cp->initState(); 147311886Sbrandon.potter@amd.com p->clone(tc, ctc, cp, flags); 147411886Sbrandon.potter@amd.com 147511911SBrandon.Potter@amd.com if (flags & OS::TGT_CLONE_THREAD) { 147611911SBrandon.Potter@amd.com delete cp->sigchld; 147711911SBrandon.Potter@amd.com cp->sigchld = p->sigchld; 147811911SBrandon.Potter@amd.com } else if (flags & OS::TGT_SIGCHLD) { 147911911SBrandon.Potter@amd.com *cp->sigchld = true; 148011911SBrandon.Potter@amd.com } 148111911SBrandon.Potter@amd.com 148211886Sbrandon.potter@amd.com if (flags & OS::TGT_CLONE_CHILD_SETTID) { 148311886Sbrandon.potter@amd.com BufferArg ctidBuf(ctidPtr, sizeof(long)); 148411886Sbrandon.potter@amd.com long *ctid = (long *)ctidBuf.bufferPtr(); 148511886Sbrandon.potter@amd.com *ctid = cp->pid(); 148611886Sbrandon.potter@amd.com ctidBuf.copyOut(ctc->getMemProxy()); 148711886Sbrandon.potter@amd.com } 148811886Sbrandon.potter@amd.com 148911886Sbrandon.potter@amd.com if (flags & OS::TGT_CLONE_CHILD_CLEARTID) 149011886Sbrandon.potter@amd.com cp->childClearTID = (uint64_t)ctidPtr; 149111886Sbrandon.potter@amd.com 149211886Sbrandon.potter@amd.com ctc->clearArchRegs(); 149311886Sbrandon.potter@amd.com 149413536Sandreas.sandberg@arm.com OS::archClone(flags, p, cp, tc, ctc, newStack, tlsPtr); 149511886Sbrandon.potter@amd.com 149611886Sbrandon.potter@amd.com cp->setSyscallReturn(ctc, 0); 149711886Sbrandon.potter@amd.com 149811886Sbrandon.potter@amd.com#if THE_ISA == ALPHA_ISA 149911886Sbrandon.potter@amd.com ctc->setIntReg(TheISA::SyscallSuccessReg, 0); 150011886Sbrandon.potter@amd.com#elif THE_ISA == SPARC_ISA 150111886Sbrandon.potter@amd.com tc->setIntReg(TheISA::SyscallPseudoReturnReg, 0); 150211886Sbrandon.potter@amd.com ctc->setIntReg(TheISA::SyscallPseudoReturnReg, 1); 150311886Sbrandon.potter@amd.com#endif 150411886Sbrandon.potter@amd.com 150513535Sandreas.sandberg@arm.com TheISA::PCState cpc = tc->pcState(); 150613535Sandreas.sandberg@arm.com cpc.advance(); 150713535Sandreas.sandberg@arm.com ctc->pcState(cpc); 150811886Sbrandon.potter@amd.com ctc->activate(); 150911886Sbrandon.potter@amd.com 151011886Sbrandon.potter@amd.com return cp->pid(); 151111886Sbrandon.potter@amd.com} 15121706SN/A 15131706SN/A/// Target fstatfs() handler. 15141706SN/Atemplate <class OS> 15151706SN/ASyscallReturn 151611856Sbrandon.potter@amd.comfstatfsFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 15171706SN/A{ 15186701Sgblack@eecs.umich.edu int index = 0; 151911856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 152011856Sbrandon.potter@amd.com Addr bufPtr = p->getSyscallArg(tc, index); 15211706SN/A 152211856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 152311856Sbrandon.potter@amd.com if (!ffdp) 15241706SN/A return -EBADF; 152511856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 15261706SN/A 15271706SN/A struct statfs hostBuf; 152810931Sbrandon.potter@amd.com int result = fstatfs(sim_fd, &hostBuf); 15291706SN/A 15301706SN/A if (result < 0) 15312218SN/A return -errno; 15321706SN/A 153311759Sbrandon.potter@amd.com copyOutStatfsBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 15341706SN/A 15351706SN/A return 0; 15361706SN/A} 15371706SN/A 153813572Sbrandon.potter@amd.com/// Target readv() handler. 153913572Sbrandon.potter@amd.comtemplate <class OS> 154013572Sbrandon.potter@amd.comSyscallReturn 154113572Sbrandon.potter@amd.comreadvFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 154213572Sbrandon.potter@amd.com{ 154313572Sbrandon.potter@amd.com int index = 0; 154413572Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 154513572Sbrandon.potter@amd.com 154613572Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 154713572Sbrandon.potter@amd.com if (!ffdp) 154813572Sbrandon.potter@amd.com return -EBADF; 154913572Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 155013572Sbrandon.potter@amd.com 155113572Sbrandon.potter@amd.com SETranslatingPortProxy &prox = tc->getMemProxy(); 155213572Sbrandon.potter@amd.com uint64_t tiov_base = p->getSyscallArg(tc, index); 155313572Sbrandon.potter@amd.com size_t count = p->getSyscallArg(tc, index); 155413572Sbrandon.potter@amd.com typename OS::tgt_iovec tiov[count]; 155513572Sbrandon.potter@amd.com struct iovec hiov[count]; 155613572Sbrandon.potter@amd.com for (size_t i = 0; i < count; ++i) { 155713572Sbrandon.potter@amd.com prox.readBlob(tiov_base + (i * sizeof(typename OS::tgt_iovec)), 155813572Sbrandon.potter@amd.com (uint8_t*)&tiov[i], sizeof(typename OS::tgt_iovec)); 155913572Sbrandon.potter@amd.com hiov[i].iov_len = TheISA::gtoh(tiov[i].iov_len); 156013572Sbrandon.potter@amd.com hiov[i].iov_base = new char [hiov[i].iov_len]; 156113572Sbrandon.potter@amd.com } 156213572Sbrandon.potter@amd.com 156313572Sbrandon.potter@amd.com int result = readv(sim_fd, hiov, count); 156413572Sbrandon.potter@amd.com int local_errno = errno; 156513572Sbrandon.potter@amd.com 156613572Sbrandon.potter@amd.com for (size_t i = 0; i < count; ++i) { 156713572Sbrandon.potter@amd.com if (result != -1) { 156813572Sbrandon.potter@amd.com prox.writeBlob(TheISA::htog(tiov[i].iov_base), 156913572Sbrandon.potter@amd.com (uint8_t*)hiov[i].iov_base, hiov[i].iov_len); 157013572Sbrandon.potter@amd.com } 157113572Sbrandon.potter@amd.com delete [] (char *)hiov[i].iov_base; 157213572Sbrandon.potter@amd.com } 157313572Sbrandon.potter@amd.com 157413572Sbrandon.potter@amd.com return (result == -1) ? -local_errno : result; 157513572Sbrandon.potter@amd.com} 15761706SN/A 15771999SN/A/// Target writev() handler. 15781999SN/Atemplate <class OS> 15791999SN/ASyscallReturn 158011856Sbrandon.potter@amd.comwritevFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 15811999SN/A{ 15826701Sgblack@eecs.umich.edu int index = 0; 158311856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 158410931Sbrandon.potter@amd.com 158511856Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 158611856Sbrandon.potter@amd.com if (!hbfdp) 15871999SN/A return -EBADF; 158811856Sbrandon.potter@amd.com int sim_fd = hbfdp->getSimFD(); 15891999SN/A 159011856Sbrandon.potter@amd.com SETranslatingPortProxy &prox = tc->getMemProxy(); 159111856Sbrandon.potter@amd.com uint64_t tiov_base = p->getSyscallArg(tc, index); 159211856Sbrandon.potter@amd.com size_t count = p->getSyscallArg(tc, index); 15931999SN/A struct iovec hiov[count]; 15946227Snate@binkert.org for (size_t i = 0; i < count; ++i) { 15951999SN/A typename OS::tgt_iovec tiov; 15962461SN/A 159711856Sbrandon.potter@amd.com prox.readBlob(tiov_base + i*sizeof(typename OS::tgt_iovec), 159811856Sbrandon.potter@amd.com (uint8_t*)&tiov, sizeof(typename OS::tgt_iovec)); 15998737Skoansin.tan@gmail.com hiov[i].iov_len = TheISA::gtoh(tiov.iov_len); 16001999SN/A hiov[i].iov_base = new char [hiov[i].iov_len]; 160111856Sbrandon.potter@amd.com prox.readBlob(TheISA::gtoh(tiov.iov_base), (uint8_t *)hiov[i].iov_base, 160211856Sbrandon.potter@amd.com hiov[i].iov_len); 16031999SN/A } 16041999SN/A 160510931Sbrandon.potter@amd.com int result = writev(sim_fd, hiov, count); 16061999SN/A 16076227Snate@binkert.org for (size_t i = 0; i < count; ++i) 16081999SN/A delete [] (char *)hiov[i].iov_base; 16091999SN/A 161013572Sbrandon.potter@amd.com return (result == -1) ? -errno : result; 16111999SN/A} 16121999SN/A 161311385Sbrandon.potter@amd.com/// Real mmap handler. 1614360SN/Atemplate <class OS> 16151450SN/ASyscallReturn 161611851Sbrandon.potter@amd.commmapImpl(SyscallDesc *desc, int num, Process *p, ThreadContext *tc, 161711385Sbrandon.potter@amd.com bool is_mmap2) 1618360SN/A{ 16196701Sgblack@eecs.umich.edu int index = 0; 16206701Sgblack@eecs.umich.edu Addr start = p->getSyscallArg(tc, index); 16216701Sgblack@eecs.umich.edu uint64_t length = p->getSyscallArg(tc, index); 162211383Sbrandon.potter@amd.com int prot = p->getSyscallArg(tc, index); 162311383Sbrandon.potter@amd.com int tgt_flags = p->getSyscallArg(tc, index); 16248324Ssteve.reinhardt@amd.com int tgt_fd = p->getSyscallArg(tc, index); 162510486Stjablin@gmail.com int offset = p->getSyscallArg(tc, index); 1626360SN/A 162711385Sbrandon.potter@amd.com if (is_mmap2) 162811385Sbrandon.potter@amd.com offset *= TheISA::PageBytes; 16299008Sgblack@eecs.umich.edu 163011383Sbrandon.potter@amd.com if (start & (TheISA::PageBytes - 1) || 163111383Sbrandon.potter@amd.com offset & (TheISA::PageBytes - 1) || 163211383Sbrandon.potter@amd.com (tgt_flags & OS::TGT_MAP_PRIVATE && 163311383Sbrandon.potter@amd.com tgt_flags & OS::TGT_MAP_SHARED) || 163411383Sbrandon.potter@amd.com (!(tgt_flags & OS::TGT_MAP_PRIVATE) && 163511383Sbrandon.potter@amd.com !(tgt_flags & OS::TGT_MAP_SHARED)) || 163611383Sbrandon.potter@amd.com !length) { 163711383Sbrandon.potter@amd.com return -EINVAL; 163811383Sbrandon.potter@amd.com } 16398324Ssteve.reinhardt@amd.com 164011383Sbrandon.potter@amd.com if ((prot & PROT_WRITE) && (tgt_flags & OS::TGT_MAP_SHARED)) { 164111383Sbrandon.potter@amd.com // With shared mmaps, there are two cases to consider: 164211383Sbrandon.potter@amd.com // 1) anonymous: writes should modify the mapping and this should be 164311383Sbrandon.potter@amd.com // visible to observers who share the mapping. Currently, it's 164411383Sbrandon.potter@amd.com // difficult to update the shared mapping because there's no 164511383Sbrandon.potter@amd.com // structure which maintains information about the which virtual 164611383Sbrandon.potter@amd.com // memory areas are shared. If that structure existed, it would be 164711383Sbrandon.potter@amd.com // possible to make the translations point to the same frames. 164811383Sbrandon.potter@amd.com // 2) file-backed: writes should modify the mapping and the file 164911383Sbrandon.potter@amd.com // which is backed by the mapping. The shared mapping problem is the 165011383Sbrandon.potter@amd.com // same as what was mentioned about the anonymous mappings. For 165111383Sbrandon.potter@amd.com // file-backed mappings, the writes to the file are difficult 165211383Sbrandon.potter@amd.com // because it requires syncing what the mapping holds with the file 165311383Sbrandon.potter@amd.com // that resides on the host system. So, any write on a real system 165411383Sbrandon.potter@amd.com // would cause the change to be propagated to the file mapping at 165511383Sbrandon.potter@amd.com // some point in the future (the inode is tracked along with the 165611383Sbrandon.potter@amd.com // mapping). This isn't guaranteed to always happen, but it usually 165711383Sbrandon.potter@amd.com // works well enough. The guarantee is provided by the msync system 165811383Sbrandon.potter@amd.com // call. We could force the change through with shared mappings with 165911383Sbrandon.potter@amd.com // a call to msync, but that again would require more information 166011383Sbrandon.potter@amd.com // than we currently maintain. 166111383Sbrandon.potter@amd.com warn("mmap: writing to shared mmap region is currently " 166211383Sbrandon.potter@amd.com "unsupported. The write succeeds on the target, but it " 166311383Sbrandon.potter@amd.com "will not be propagated to the host or shared mappings"); 16648324Ssteve.reinhardt@amd.com } 16655877Shsul@eecs.umich.edu 166610486Stjablin@gmail.com length = roundUp(length, TheISA::PageBytes); 166710486Stjablin@gmail.com 166811383Sbrandon.potter@amd.com int sim_fd = -1; 166911383Sbrandon.potter@amd.com uint8_t *pmap = nullptr; 167011383Sbrandon.potter@amd.com if (!(tgt_flags & OS::TGT_MAP_ANONYMOUS)) { 167111856Sbrandon.potter@amd.com std::shared_ptr<FDEntry> fdep = (*p->fds)[tgt_fd]; 167211624Smichael.lebeane@amd.com 167311856Sbrandon.potter@amd.com auto dfdp = std::dynamic_pointer_cast<DeviceFDEntry>(fdep); 167411856Sbrandon.potter@amd.com if (dfdp) { 167511856Sbrandon.potter@amd.com EmulatedDriver *emul_driver = dfdp->getDriver(); 167611856Sbrandon.potter@amd.com return emul_driver->mmap(p, tc, start, length, prot, 167711624Smichael.lebeane@amd.com tgt_flags, tgt_fd, offset); 167811624Smichael.lebeane@amd.com } 167911624Smichael.lebeane@amd.com 168011856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(fdep); 168111856Sbrandon.potter@amd.com if (!ffdp) 168211383Sbrandon.potter@amd.com return -EBADF; 168311856Sbrandon.potter@amd.com sim_fd = ffdp->getSimFD(); 1684360SN/A 168511913SBrandon.Potter@amd.com pmap = (decltype(pmap))mmap(nullptr, length, PROT_READ, MAP_PRIVATE, 168611383Sbrandon.potter@amd.com sim_fd, offset); 16878600Ssteve.reinhardt@amd.com 168811383Sbrandon.potter@amd.com if (pmap == (decltype(pmap))-1) { 168911383Sbrandon.potter@amd.com warn("mmap: failed to map file into host address space"); 169011383Sbrandon.potter@amd.com return -errno; 16918600Ssteve.reinhardt@amd.com } 16922544SN/A } 16932544SN/A 169411383Sbrandon.potter@amd.com // Extend global mmap region if necessary. Note that we ignore the 169511383Sbrandon.potter@amd.com // start address unless MAP_FIXED is specified. 169611383Sbrandon.potter@amd.com if (!(tgt_flags & OS::TGT_MAP_FIXED)) { 169711905SBrandon.Potter@amd.com std::shared_ptr<MemState> mem_state = p->memState; 169811905SBrandon.Potter@amd.com Addr mmap_end = mem_state->getMmapEnd(); 169911905SBrandon.Potter@amd.com 170011905SBrandon.Potter@amd.com start = p->mmapGrowsDown() ? mmap_end - length : mmap_end; 170111905SBrandon.Potter@amd.com mmap_end = p->mmapGrowsDown() ? start : mmap_end + length; 170211905SBrandon.Potter@amd.com 170311905SBrandon.Potter@amd.com mem_state->setMmapEnd(mmap_end); 170411383Sbrandon.potter@amd.com } 170511383Sbrandon.potter@amd.com 170611383Sbrandon.potter@amd.com DPRINTF_SYSCALL(Verbose, " mmap range is 0x%x - 0x%x\n", 170711383Sbrandon.potter@amd.com start, start + length - 1); 170811383Sbrandon.potter@amd.com 170911383Sbrandon.potter@amd.com // We only allow mappings to overwrite existing mappings if 171011383Sbrandon.potter@amd.com // TGT_MAP_FIXED is set. Otherwise it shouldn't be a problem 171111383Sbrandon.potter@amd.com // because we ignore the start hint if TGT_MAP_FIXED is not set. 171211383Sbrandon.potter@amd.com int clobber = tgt_flags & OS::TGT_MAP_FIXED; 171311383Sbrandon.potter@amd.com if (clobber) { 171411383Sbrandon.potter@amd.com for (auto tc : p->system->threadContexts) { 171511383Sbrandon.potter@amd.com // If we might be overwriting old mappings, we need to 171611383Sbrandon.potter@amd.com // invalidate potentially stale mappings out of the TLBs. 171711383Sbrandon.potter@amd.com tc->getDTBPtr()->flushAll(); 171811383Sbrandon.potter@amd.com tc->getITBPtr()->flushAll(); 17198600Ssteve.reinhardt@amd.com } 17206672Sgblack@eecs.umich.edu } 17218600Ssteve.reinhardt@amd.com 172211383Sbrandon.potter@amd.com // Allocate physical memory and map it in. If the page table is already 172311383Sbrandon.potter@amd.com // mapped and clobber is not set, the simulator will issue throw a 172411383Sbrandon.potter@amd.com // fatal and bail out of the simulation. 17258601Ssteve.reinhardt@amd.com p->allocateMem(start, length, clobber); 17262544SN/A 172711383Sbrandon.potter@amd.com // Transfer content into target address space. 172811383Sbrandon.potter@amd.com SETranslatingPortProxy &tp = tc->getMemProxy(); 172911383Sbrandon.potter@amd.com if (tgt_flags & OS::TGT_MAP_ANONYMOUS) { 173011383Sbrandon.potter@amd.com // In general, we should zero the mapped area for anonymous mappings, 173111383Sbrandon.potter@amd.com // with something like: 173211383Sbrandon.potter@amd.com // tp.memsetBlob(start, 0, length); 173311383Sbrandon.potter@amd.com // However, given that we don't support sparse mappings, and 173411383Sbrandon.potter@amd.com // some applications can map a couple of gigabytes of space 173511383Sbrandon.potter@amd.com // (intending sparse usage), that can get painfully expensive. 173611383Sbrandon.potter@amd.com // Fortunately, since we don't properly implement munmap either, 173711383Sbrandon.potter@amd.com // there's no danger of remapping used memory, so for now all 173811383Sbrandon.potter@amd.com // newly mapped memory should already be zeroed so we can skip it. 173911383Sbrandon.potter@amd.com } else { 174011383Sbrandon.potter@amd.com // It is possible to mmap an area larger than a file, however 174111383Sbrandon.potter@amd.com // accessing unmapped portions the system triggers a "Bus error" 174211383Sbrandon.potter@amd.com // on the host. We must know when to stop copying the file from 174311383Sbrandon.potter@amd.com // the host into the target address space. 174411383Sbrandon.potter@amd.com struct stat file_stat; 174511383Sbrandon.potter@amd.com if (fstat(sim_fd, &file_stat) > 0) 174611383Sbrandon.potter@amd.com fatal("mmap: cannot stat file"); 174711383Sbrandon.potter@amd.com 174811383Sbrandon.potter@amd.com // Copy the portion of the file that is resident. This requires 174911383Sbrandon.potter@amd.com // checking both the mmap size and the filesize that we are 175011383Sbrandon.potter@amd.com // trying to mmap into this space; the mmap size also depends 175111383Sbrandon.potter@amd.com // on the specified offset into the file. 175211383Sbrandon.potter@amd.com uint64_t size = std::min((uint64_t)file_stat.st_size - offset, 175311383Sbrandon.potter@amd.com length); 175411383Sbrandon.potter@amd.com tp.writeBlob(start, pmap, size); 175511383Sbrandon.potter@amd.com 175611383Sbrandon.potter@amd.com // Cleanup the mmap region before exiting this function. 175711383Sbrandon.potter@amd.com munmap(pmap, length); 175811383Sbrandon.potter@amd.com 175911392Sbrandon.potter@amd.com // Maintain the symbol table for dynamic executables. 176011392Sbrandon.potter@amd.com // The loader will call mmap to map the images into its address 176111392Sbrandon.potter@amd.com // space and we intercept that here. We can verify that we are 176211392Sbrandon.potter@amd.com // executing inside the loader by checking the program counter value. 176311392Sbrandon.potter@amd.com // XXX: with multiprogrammed workloads or multi-node configurations, 176411392Sbrandon.potter@amd.com // this will not work since there is a single global symbol table. 176511392Sbrandon.potter@amd.com ObjectFile *interpreter = p->getInterpreter(); 176611392Sbrandon.potter@amd.com if (interpreter) { 176711392Sbrandon.potter@amd.com Addr text_start = interpreter->textBase(); 176811392Sbrandon.potter@amd.com Addr text_end = text_start + interpreter->textSize(); 176911392Sbrandon.potter@amd.com 177011392Sbrandon.potter@amd.com Addr pc = tc->pcState().pc(); 177111392Sbrandon.potter@amd.com 177211392Sbrandon.potter@amd.com if (pc >= text_start && pc < text_end) { 177311856Sbrandon.potter@amd.com std::shared_ptr<FDEntry> fdep = (*p->fds)[tgt_fd]; 177411856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(fdep); 177511856Sbrandon.potter@amd.com ObjectFile *lib = createObjectFile(ffdp->getFileName()); 177611392Sbrandon.potter@amd.com 177711392Sbrandon.potter@amd.com if (lib) { 177811392Sbrandon.potter@amd.com lib->loadAllSymbols(debugSymbolTable, 177911392Sbrandon.potter@amd.com lib->textBase(), start); 178011392Sbrandon.potter@amd.com } 178111392Sbrandon.potter@amd.com } 178211392Sbrandon.potter@amd.com } 178311392Sbrandon.potter@amd.com 178411383Sbrandon.potter@amd.com // Note that we do not zero out the remainder of the mapping. This 178511383Sbrandon.potter@amd.com // is done by a real system, but it probably will not affect 178611383Sbrandon.potter@amd.com // execution (hopefully). 178711383Sbrandon.potter@amd.com } 178811383Sbrandon.potter@amd.com 17891458SN/A return start; 1790360SN/A} 1791360SN/A 179211593Santhony.gutierrez@amd.comtemplate <class OS> 179311593Santhony.gutierrez@amd.comSyscallReturn 179411851Sbrandon.potter@amd.compwrite64Func(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 179511593Santhony.gutierrez@amd.com{ 179611593Santhony.gutierrez@amd.com int index = 0; 179711593Santhony.gutierrez@amd.com int tgt_fd = p->getSyscallArg(tc, index); 179811593Santhony.gutierrez@amd.com Addr bufPtr = p->getSyscallArg(tc, index); 179911593Santhony.gutierrez@amd.com int nbytes = p->getSyscallArg(tc, index); 180011593Santhony.gutierrez@amd.com int offset = p->getSyscallArg(tc, index); 180111593Santhony.gutierrez@amd.com 180211856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 180311856Sbrandon.potter@amd.com if (!ffdp) 180411593Santhony.gutierrez@amd.com return -EBADF; 180511856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 180611593Santhony.gutierrez@amd.com 180711593Santhony.gutierrez@amd.com BufferArg bufArg(bufPtr, nbytes); 180811593Santhony.gutierrez@amd.com bufArg.copyIn(tc->getMemProxy()); 180911593Santhony.gutierrez@amd.com 181011594Santhony.gutierrez@amd.com int bytes_written = pwrite(sim_fd, bufArg.bufferPtr(), nbytes, offset); 181111593Santhony.gutierrez@amd.com 181211593Santhony.gutierrez@amd.com return (bytes_written == -1) ? -errno : bytes_written; 181311593Santhony.gutierrez@amd.com} 181411593Santhony.gutierrez@amd.com 181511385Sbrandon.potter@amd.com/// Target mmap() handler. 181611385Sbrandon.potter@amd.comtemplate <class OS> 181711385Sbrandon.potter@amd.comSyscallReturn 181811851Sbrandon.potter@amd.commmapFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 181911385Sbrandon.potter@amd.com{ 182011385Sbrandon.potter@amd.com return mmapImpl<OS>(desc, num, p, tc, false); 182111385Sbrandon.potter@amd.com} 182211385Sbrandon.potter@amd.com 182311385Sbrandon.potter@amd.com/// Target mmap2() handler. 182411385Sbrandon.potter@amd.comtemplate <class OS> 182511385Sbrandon.potter@amd.comSyscallReturn 182611851Sbrandon.potter@amd.commmap2Func(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 182711385Sbrandon.potter@amd.com{ 182811385Sbrandon.potter@amd.com return mmapImpl<OS>(desc, num, p, tc, true); 182911385Sbrandon.potter@amd.com} 183011385Sbrandon.potter@amd.com 1831378SN/A/// Target getrlimit() handler. 1832360SN/Atemplate <class OS> 18331450SN/ASyscallReturn 183411851Sbrandon.potter@amd.comgetrlimitFunc(SyscallDesc *desc, int callnum, Process *process, 183511851Sbrandon.potter@amd.com ThreadContext *tc) 1836360SN/A{ 18376701Sgblack@eecs.umich.edu int index = 0; 18386701Sgblack@eecs.umich.edu unsigned resource = process->getSyscallArg(tc, index); 18396701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::rlimit> rlp(process->getSyscallArg(tc, index)); 1840360SN/A 1841360SN/A switch (resource) { 184211906SBrandon.Potter@amd.com case OS::TGT_RLIMIT_STACK: 184311906SBrandon.Potter@amd.com // max stack size in bytes: make up a number (8MB for now) 184411906SBrandon.Potter@amd.com rlp->rlim_cur = rlp->rlim_max = 8 * 1024 * 1024; 184511906SBrandon.Potter@amd.com rlp->rlim_cur = TheISA::htog(rlp->rlim_cur); 184611906SBrandon.Potter@amd.com rlp->rlim_max = TheISA::htog(rlp->rlim_max); 184711906SBrandon.Potter@amd.com break; 1848360SN/A 184911906SBrandon.Potter@amd.com case OS::TGT_RLIMIT_DATA: 185011906SBrandon.Potter@amd.com // max data segment size in bytes: make up a number 185111906SBrandon.Potter@amd.com rlp->rlim_cur = rlp->rlim_max = 256 * 1024 * 1024; 185211906SBrandon.Potter@amd.com rlp->rlim_cur = TheISA::htog(rlp->rlim_cur); 185311906SBrandon.Potter@amd.com rlp->rlim_max = TheISA::htog(rlp->rlim_max); 185411906SBrandon.Potter@amd.com break; 18555877Shsul@eecs.umich.edu 185611906SBrandon.Potter@amd.com default: 185711906SBrandon.Potter@amd.com warn("getrlimit: unimplemented resource %d", resource); 185811906SBrandon.Potter@amd.com return -EINVAL; 185911906SBrandon.Potter@amd.com break; 1860360SN/A } 1861360SN/A 18628706Sandreas.hansson@arm.com rlp.copyOut(tc->getMemProxy()); 18631458SN/A return 0; 1864360SN/A} 1865360SN/A 186612235Sar4jc@virginia.edutemplate <class OS> 186712235Sar4jc@virginia.eduSyscallReturn 186812235Sar4jc@virginia.eduprlimitFunc(SyscallDesc *desc, int callnum, Process *process, 186912235Sar4jc@virginia.edu ThreadContext *tc) 187012235Sar4jc@virginia.edu{ 187112235Sar4jc@virginia.edu int index = 0; 187212235Sar4jc@virginia.edu if (process->getSyscallArg(tc, index) != 0) 187312235Sar4jc@virginia.edu { 187412235Sar4jc@virginia.edu warn("prlimit: ignoring rlimits for nonzero pid"); 187512235Sar4jc@virginia.edu return -EPERM; 187612235Sar4jc@virginia.edu } 187712235Sar4jc@virginia.edu int resource = process->getSyscallArg(tc, index); 187812235Sar4jc@virginia.edu Addr n = process->getSyscallArg(tc, index); 187912235Sar4jc@virginia.edu if (n != 0) 188012235Sar4jc@virginia.edu warn("prlimit: ignoring new rlimit"); 188112235Sar4jc@virginia.edu Addr o = process->getSyscallArg(tc, index); 188212235Sar4jc@virginia.edu if (o != 0) 188312235Sar4jc@virginia.edu { 188412416Sqtt2@cornell.edu TypedBufferArg<typename OS::rlimit> rlp(o); 188512235Sar4jc@virginia.edu switch (resource) { 188612235Sar4jc@virginia.edu case OS::TGT_RLIMIT_STACK: 188712235Sar4jc@virginia.edu // max stack size in bytes: make up a number (8MB for now) 188812235Sar4jc@virginia.edu rlp->rlim_cur = rlp->rlim_max = 8 * 1024 * 1024; 188912235Sar4jc@virginia.edu rlp->rlim_cur = TheISA::htog(rlp->rlim_cur); 189012235Sar4jc@virginia.edu rlp->rlim_max = TheISA::htog(rlp->rlim_max); 189112235Sar4jc@virginia.edu break; 189212235Sar4jc@virginia.edu case OS::TGT_RLIMIT_DATA: 189312235Sar4jc@virginia.edu // max data segment size in bytes: make up a number 189412235Sar4jc@virginia.edu rlp->rlim_cur = rlp->rlim_max = 256*1024*1024; 189512235Sar4jc@virginia.edu rlp->rlim_cur = TheISA::htog(rlp->rlim_cur); 189612235Sar4jc@virginia.edu rlp->rlim_max = TheISA::htog(rlp->rlim_max); 189712593Sjason@lowepower.com break; 189812235Sar4jc@virginia.edu default: 189912235Sar4jc@virginia.edu warn("prlimit: unimplemented resource %d", resource); 190012235Sar4jc@virginia.edu return -EINVAL; 190112235Sar4jc@virginia.edu break; 190212235Sar4jc@virginia.edu } 190312235Sar4jc@virginia.edu rlp.copyOut(tc->getMemProxy()); 190412235Sar4jc@virginia.edu } 190512235Sar4jc@virginia.edu return 0; 190612235Sar4jc@virginia.edu} 190712235Sar4jc@virginia.edu 190810796Sbrandon.potter@amd.com/// Target clock_gettime() function. 190910796Sbrandon.potter@amd.comtemplate <class OS> 191010796Sbrandon.potter@amd.comSyscallReturn 191111851Sbrandon.potter@amd.comclock_gettimeFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 191210796Sbrandon.potter@amd.com{ 191310796Sbrandon.potter@amd.com int index = 1; 191410796Sbrandon.potter@amd.com //int clk_id = p->getSyscallArg(tc, index); 191510796Sbrandon.potter@amd.com TypedBufferArg<typename OS::timespec> tp(p->getSyscallArg(tc, index)); 191610796Sbrandon.potter@amd.com 191710796Sbrandon.potter@amd.com getElapsedTimeNano(tp->tv_sec, tp->tv_nsec); 191810796Sbrandon.potter@amd.com tp->tv_sec += seconds_since_epoch; 191910796Sbrandon.potter@amd.com tp->tv_sec = TheISA::htog(tp->tv_sec); 192010796Sbrandon.potter@amd.com tp->tv_nsec = TheISA::htog(tp->tv_nsec); 192110796Sbrandon.potter@amd.com 192210796Sbrandon.potter@amd.com tp.copyOut(tc->getMemProxy()); 192310796Sbrandon.potter@amd.com 192410796Sbrandon.potter@amd.com return 0; 192510796Sbrandon.potter@amd.com} 192610796Sbrandon.potter@amd.com 192711337SMichael.Lebeane@amd.com/// Target clock_getres() function. 192811337SMichael.Lebeane@amd.comtemplate <class OS> 192911337SMichael.Lebeane@amd.comSyscallReturn 193011851Sbrandon.potter@amd.comclock_getresFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 193111337SMichael.Lebeane@amd.com{ 193211337SMichael.Lebeane@amd.com int index = 1; 193311337SMichael.Lebeane@amd.com TypedBufferArg<typename OS::timespec> tp(p->getSyscallArg(tc, index)); 193411337SMichael.Lebeane@amd.com 193511337SMichael.Lebeane@amd.com // Set resolution at ns, which is what clock_gettime() returns 193611337SMichael.Lebeane@amd.com tp->tv_sec = 0; 193711337SMichael.Lebeane@amd.com tp->tv_nsec = 1; 193811337SMichael.Lebeane@amd.com 193911337SMichael.Lebeane@amd.com tp.copyOut(tc->getMemProxy()); 194011337SMichael.Lebeane@amd.com 194111337SMichael.Lebeane@amd.com return 0; 194211337SMichael.Lebeane@amd.com} 194311337SMichael.Lebeane@amd.com 1944378SN/A/// Target gettimeofday() handler. 1945360SN/Atemplate <class OS> 19461450SN/ASyscallReturn 194711851Sbrandon.potter@amd.comgettimeofdayFunc(SyscallDesc *desc, int callnum, Process *process, 194811851Sbrandon.potter@amd.com ThreadContext *tc) 1949360SN/A{ 19506701Sgblack@eecs.umich.edu int index = 0; 19516701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::timeval> tp(process->getSyscallArg(tc, index)); 1952360SN/A 195310796Sbrandon.potter@amd.com getElapsedTimeMicro(tp->tv_sec, tp->tv_usec); 1954360SN/A tp->tv_sec += seconds_since_epoch; 19556109Ssanchezd@stanford.edu tp->tv_sec = TheISA::htog(tp->tv_sec); 19566109Ssanchezd@stanford.edu tp->tv_usec = TheISA::htog(tp->tv_usec); 1957360SN/A 19588706Sandreas.hansson@arm.com tp.copyOut(tc->getMemProxy()); 1959360SN/A 19601458SN/A return 0; 1961360SN/A} 1962360SN/A 1963360SN/A 19641999SN/A/// Target utimes() handler. 19651999SN/Atemplate <class OS> 19661999SN/ASyscallReturn 196711851Sbrandon.potter@amd.comutimesFunc(SyscallDesc *desc, int callnum, Process *process, 19682680Sktlim@umich.edu ThreadContext *tc) 19691999SN/A{ 19701999SN/A std::string path; 19711999SN/A 19726701Sgblack@eecs.umich.edu int index = 0; 19738852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 19746701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 19756701Sgblack@eecs.umich.edu return -EFAULT; 19766701Sgblack@eecs.umich.edu } 19771999SN/A 19786701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::timeval [2]> 19796701Sgblack@eecs.umich.edu tp(process->getSyscallArg(tc, index)); 19808706Sandreas.hansson@arm.com tp.copyIn(tc->getMemProxy()); 19811999SN/A 19821999SN/A struct timeval hostTimeval[2]; 198311906SBrandon.Potter@amd.com for (int i = 0; i < 2; ++i) { 19848737Skoansin.tan@gmail.com hostTimeval[i].tv_sec = TheISA::gtoh((*tp)[i].tv_sec); 19858737Skoansin.tan@gmail.com hostTimeval[i].tv_usec = TheISA::gtoh((*tp)[i].tv_usec); 19861999SN/A } 19873669Sbinkertn@umich.edu 19883669Sbinkertn@umich.edu // Adjust path for current working directory 19893669Sbinkertn@umich.edu path = process->fullPath(path); 19903669Sbinkertn@umich.edu 19911999SN/A int result = utimes(path.c_str(), hostTimeval); 19921999SN/A 19931999SN/A if (result < 0) 19941999SN/A return -errno; 19951999SN/A 19961999SN/A return 0; 19971999SN/A} 199811886Sbrandon.potter@amd.com 199911886Sbrandon.potter@amd.comtemplate <class OS> 200011886Sbrandon.potter@amd.comSyscallReturn 200111886Sbrandon.potter@amd.comexecveFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 200211886Sbrandon.potter@amd.com{ 200311886Sbrandon.potter@amd.com desc->setFlags(0); 200411886Sbrandon.potter@amd.com 200511886Sbrandon.potter@amd.com int index = 0; 200611886Sbrandon.potter@amd.com std::string path; 200711886Sbrandon.potter@amd.com SETranslatingPortProxy & mem_proxy = tc->getMemProxy(); 200811886Sbrandon.potter@amd.com if (!mem_proxy.tryReadString(path, p->getSyscallArg(tc, index))) 200911886Sbrandon.potter@amd.com return -EFAULT; 201011886Sbrandon.potter@amd.com 201111886Sbrandon.potter@amd.com if (access(path.c_str(), F_OK) == -1) 201211886Sbrandon.potter@amd.com return -EACCES; 201311886Sbrandon.potter@amd.com 201411886Sbrandon.potter@amd.com auto read_in = [](std::vector<std::string> & vect, 201511886Sbrandon.potter@amd.com SETranslatingPortProxy & mem_proxy, 201611886Sbrandon.potter@amd.com Addr mem_loc) 201711886Sbrandon.potter@amd.com { 201811886Sbrandon.potter@amd.com for (int inc = 0; ; inc++) { 201911886Sbrandon.potter@amd.com BufferArg b((mem_loc + sizeof(Addr) * inc), sizeof(Addr)); 202011886Sbrandon.potter@amd.com b.copyIn(mem_proxy); 202111886Sbrandon.potter@amd.com 202211886Sbrandon.potter@amd.com if (!*(Addr*)b.bufferPtr()) 202311886Sbrandon.potter@amd.com break; 202411886Sbrandon.potter@amd.com 202511886Sbrandon.potter@amd.com vect.push_back(std::string()); 202611886Sbrandon.potter@amd.com mem_proxy.tryReadString(vect[inc], *(Addr*)b.bufferPtr()); 202711886Sbrandon.potter@amd.com } 202811886Sbrandon.potter@amd.com }; 202911886Sbrandon.potter@amd.com 203011886Sbrandon.potter@amd.com /** 203111886Sbrandon.potter@amd.com * Note that ProcessParams is generated by swig and there are no other 203211886Sbrandon.potter@amd.com * examples of how to create anything but this default constructor. The 203311886Sbrandon.potter@amd.com * fields are manually initialized instead of passing parameters to the 203411886Sbrandon.potter@amd.com * constructor. 203511886Sbrandon.potter@amd.com */ 203611886Sbrandon.potter@amd.com ProcessParams *pp = new ProcessParams(); 203711886Sbrandon.potter@amd.com pp->executable = path; 203811886Sbrandon.potter@amd.com Addr argv_mem_loc = p->getSyscallArg(tc, index); 203911886Sbrandon.potter@amd.com read_in(pp->cmd, mem_proxy, argv_mem_loc); 204011886Sbrandon.potter@amd.com Addr envp_mem_loc = p->getSyscallArg(tc, index); 204111886Sbrandon.potter@amd.com read_in(pp->env, mem_proxy, envp_mem_loc); 204211886Sbrandon.potter@amd.com pp->uid = p->uid(); 204311886Sbrandon.potter@amd.com pp->egid = p->egid(); 204411886Sbrandon.potter@amd.com pp->euid = p->euid(); 204511886Sbrandon.potter@amd.com pp->gid = p->gid(); 204611886Sbrandon.potter@amd.com pp->ppid = p->ppid(); 204711886Sbrandon.potter@amd.com pp->pid = p->pid(); 204811886Sbrandon.potter@amd.com pp->input.assign("cin"); 204911886Sbrandon.potter@amd.com pp->output.assign("cout"); 205011886Sbrandon.potter@amd.com pp->errout.assign("cerr"); 205111886Sbrandon.potter@amd.com pp->cwd.assign(p->getcwd()); 205211886Sbrandon.potter@amd.com pp->system = p->system; 205311886Sbrandon.potter@amd.com /** 205411886Sbrandon.potter@amd.com * Prevent process object creation with identical PIDs (which will trip 205511886Sbrandon.potter@amd.com * a fatal check in Process constructor). The execve call is supposed to 205611886Sbrandon.potter@amd.com * take over the currently executing process' identity but replace 205711886Sbrandon.potter@amd.com * whatever it is doing with a new process image. Instead of hijacking 205811886Sbrandon.potter@amd.com * the process object in the simulator, we create a new process object 205911886Sbrandon.potter@amd.com * and bind to the previous process' thread below (hijacking the thread). 206011886Sbrandon.potter@amd.com */ 206111886Sbrandon.potter@amd.com p->system->PIDs.erase(p->pid()); 206211886Sbrandon.potter@amd.com Process *new_p = pp->create(); 206311886Sbrandon.potter@amd.com delete pp; 206411886Sbrandon.potter@amd.com 206511886Sbrandon.potter@amd.com /** 206611886Sbrandon.potter@amd.com * Work through the file descriptor array and close any files marked 206711886Sbrandon.potter@amd.com * close-on-exec. 206811886Sbrandon.potter@amd.com */ 206911886Sbrandon.potter@amd.com new_p->fds = p->fds; 207011886Sbrandon.potter@amd.com for (int i = 0; i < new_p->fds->getSize(); i++) { 207111886Sbrandon.potter@amd.com std::shared_ptr<FDEntry> fdep = (*new_p->fds)[i]; 207211886Sbrandon.potter@amd.com if (fdep && fdep->getCOE()) 207311886Sbrandon.potter@amd.com new_p->fds->closeFDEntry(i); 207411886Sbrandon.potter@amd.com } 207511886Sbrandon.potter@amd.com 207611886Sbrandon.potter@amd.com *new_p->sigchld = true; 207711886Sbrandon.potter@amd.com 207811886Sbrandon.potter@amd.com delete p; 207911886Sbrandon.potter@amd.com tc->clearArchRegs(); 208011886Sbrandon.potter@amd.com tc->setProcessPtr(new_p); 208111886Sbrandon.potter@amd.com new_p->assignThreadContext(tc->contextId()); 208211886Sbrandon.potter@amd.com new_p->initState(); 208311886Sbrandon.potter@amd.com tc->activate(); 208411886Sbrandon.potter@amd.com TheISA::PCState pcState = tc->pcState(); 208511886Sbrandon.potter@amd.com tc->setNPC(pcState.instAddr()); 208611886Sbrandon.potter@amd.com 208711886Sbrandon.potter@amd.com desc->setFlags(SyscallDesc::SuppressReturnValue); 208811886Sbrandon.potter@amd.com return 0; 208911886Sbrandon.potter@amd.com} 209011886Sbrandon.potter@amd.com 2091378SN/A/// Target getrusage() function. 2092360SN/Atemplate <class OS> 20931450SN/ASyscallReturn 209411851Sbrandon.potter@amd.comgetrusageFunc(SyscallDesc *desc, int callnum, Process *process, 20952680Sktlim@umich.edu ThreadContext *tc) 2096360SN/A{ 20976701Sgblack@eecs.umich.edu int index = 0; 20986701Sgblack@eecs.umich.edu int who = process->getSyscallArg(tc, index); // THREAD, SELF, or CHILDREN 20996701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::rusage> rup(process->getSyscallArg(tc, index)); 2100360SN/A 21013670Sbinkertn@umich.edu rup->ru_utime.tv_sec = 0; 21023670Sbinkertn@umich.edu rup->ru_utime.tv_usec = 0; 2103360SN/A rup->ru_stime.tv_sec = 0; 2104360SN/A rup->ru_stime.tv_usec = 0; 2105360SN/A rup->ru_maxrss = 0; 2106360SN/A rup->ru_ixrss = 0; 2107360SN/A rup->ru_idrss = 0; 2108360SN/A rup->ru_isrss = 0; 2109360SN/A rup->ru_minflt = 0; 2110360SN/A rup->ru_majflt = 0; 2111360SN/A rup->ru_nswap = 0; 2112360SN/A rup->ru_inblock = 0; 2113360SN/A rup->ru_oublock = 0; 2114360SN/A rup->ru_msgsnd = 0; 2115360SN/A rup->ru_msgrcv = 0; 2116360SN/A rup->ru_nsignals = 0; 2117360SN/A rup->ru_nvcsw = 0; 2118360SN/A rup->ru_nivcsw = 0; 2119360SN/A 21203670Sbinkertn@umich.edu switch (who) { 21213670Sbinkertn@umich.edu case OS::TGT_RUSAGE_SELF: 212210796Sbrandon.potter@amd.com getElapsedTimeMicro(rup->ru_utime.tv_sec, rup->ru_utime.tv_usec); 21238737Skoansin.tan@gmail.com rup->ru_utime.tv_sec = TheISA::htog(rup->ru_utime.tv_sec); 21248737Skoansin.tan@gmail.com rup->ru_utime.tv_usec = TheISA::htog(rup->ru_utime.tv_usec); 21253670Sbinkertn@umich.edu break; 21263670Sbinkertn@umich.edu 21273670Sbinkertn@umich.edu case OS::TGT_RUSAGE_CHILDREN: 21283670Sbinkertn@umich.edu // do nothing. We have no child processes, so they take no time. 21293670Sbinkertn@umich.edu break; 21303670Sbinkertn@umich.edu 21313670Sbinkertn@umich.edu default: 21323670Sbinkertn@umich.edu // don't really handle THREAD or CHILDREN, but just warn and 21333670Sbinkertn@umich.edu // plow ahead 21343670Sbinkertn@umich.edu warn("getrusage() only supports RUSAGE_SELF. Parameter %d ignored.", 21353670Sbinkertn@umich.edu who); 21363670Sbinkertn@umich.edu } 21373670Sbinkertn@umich.edu 21388706Sandreas.hansson@arm.com rup.copyOut(tc->getMemProxy()); 2139360SN/A 21401458SN/A return 0; 2141360SN/A} 2142360SN/A 21436683Stjones1@inf.ed.ac.uk/// Target times() function. 21446683Stjones1@inf.ed.ac.uktemplate <class OS> 21456683Stjones1@inf.ed.ac.ukSyscallReturn 214611851Sbrandon.potter@amd.comtimesFunc(SyscallDesc *desc, int callnum, Process *process, 214711851Sbrandon.potter@amd.com ThreadContext *tc) 21486683Stjones1@inf.ed.ac.uk{ 21496701Sgblack@eecs.umich.edu int index = 0; 21506701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::tms> bufp(process->getSyscallArg(tc, index)); 21516683Stjones1@inf.ed.ac.uk 21526683Stjones1@inf.ed.ac.uk // Fill in the time structure (in clocks) 21537823Ssteve.reinhardt@amd.com int64_t clocks = curTick() * OS::M5_SC_CLK_TCK / SimClock::Int::s; 21546683Stjones1@inf.ed.ac.uk bufp->tms_utime = clocks; 21556683Stjones1@inf.ed.ac.uk bufp->tms_stime = 0; 21566683Stjones1@inf.ed.ac.uk bufp->tms_cutime = 0; 21576683Stjones1@inf.ed.ac.uk bufp->tms_cstime = 0; 21586683Stjones1@inf.ed.ac.uk 21596683Stjones1@inf.ed.ac.uk // Convert to host endianness 21608737Skoansin.tan@gmail.com bufp->tms_utime = TheISA::htog(bufp->tms_utime); 21616683Stjones1@inf.ed.ac.uk 21626683Stjones1@inf.ed.ac.uk // Write back 21638706Sandreas.hansson@arm.com bufp.copyOut(tc->getMemProxy()); 21646683Stjones1@inf.ed.ac.uk 21656683Stjones1@inf.ed.ac.uk // Return clock ticks since system boot 21666683Stjones1@inf.ed.ac.uk return clocks; 21676683Stjones1@inf.ed.ac.uk} 21682553SN/A 21696684Stjones1@inf.ed.ac.uk/// Target time() function. 21706684Stjones1@inf.ed.ac.uktemplate <class OS> 21716684Stjones1@inf.ed.ac.ukSyscallReturn 217211851Sbrandon.potter@amd.comtimeFunc(SyscallDesc *desc, int callnum, Process *process, ThreadContext *tc) 21736684Stjones1@inf.ed.ac.uk{ 21746684Stjones1@inf.ed.ac.uk typename OS::time_t sec, usec; 217510796Sbrandon.potter@amd.com getElapsedTimeMicro(sec, usec); 21766684Stjones1@inf.ed.ac.uk sec += seconds_since_epoch; 21776684Stjones1@inf.ed.ac.uk 21786701Sgblack@eecs.umich.edu int index = 0; 21796701Sgblack@eecs.umich.edu Addr taddr = (Addr)process->getSyscallArg(tc, index); 218011321Ssteve.reinhardt@amd.com if (taddr != 0) { 21816684Stjones1@inf.ed.ac.uk typename OS::time_t t = sec; 21828737Skoansin.tan@gmail.com t = TheISA::htog(t); 21838852Sandreas.hansson@arm.com SETranslatingPortProxy &p = tc->getMemProxy(); 21848852Sandreas.hansson@arm.com p.writeBlob(taddr, (uint8_t*)&t, (int)sizeof(typename OS::time_t)); 21856684Stjones1@inf.ed.ac.uk } 21866684Stjones1@inf.ed.ac.uk return sec; 21876684Stjones1@inf.ed.ac.uk} 21882553SN/A 218911910SBrandon.Potter@amd.comtemplate <class OS> 219011910SBrandon.Potter@amd.comSyscallReturn 219111910SBrandon.Potter@amd.comtgkillFunc(SyscallDesc *desc, int num, Process *process, ThreadContext *tc) 219211910SBrandon.Potter@amd.com{ 219311910SBrandon.Potter@amd.com int index = 0; 219411910SBrandon.Potter@amd.com int tgid = process->getSyscallArg(tc, index); 219511910SBrandon.Potter@amd.com int tid = process->getSyscallArg(tc, index); 219611910SBrandon.Potter@amd.com int sig = process->getSyscallArg(tc, index); 219711910SBrandon.Potter@amd.com 219811910SBrandon.Potter@amd.com /** 219911910SBrandon.Potter@amd.com * This system call is intended to allow killing a specific thread 220011910SBrandon.Potter@amd.com * within an arbitrary thread group if sanctioned with permission checks. 220111910SBrandon.Potter@amd.com * It's usually true that threads share the termination signal as pointed 220211910SBrandon.Potter@amd.com * out by the pthread_kill man page and this seems to be the intended 220311910SBrandon.Potter@amd.com * usage. Due to this being an emulated environment, assume the following: 220411910SBrandon.Potter@amd.com * Threads are allowed to call tgkill because the EUID for all threads 220511910SBrandon.Potter@amd.com * should be the same. There is no signal handling mechanism for kernel 220611910SBrandon.Potter@amd.com * registration of signal handlers since signals are poorly supported in 220711910SBrandon.Potter@amd.com * emulation mode. Since signal handlers cannot be registered, all 220811910SBrandon.Potter@amd.com * threads within in a thread group must share the termination signal. 220911910SBrandon.Potter@amd.com * We never exhaust PIDs so there's no chance of finding the wrong one 221011910SBrandon.Potter@amd.com * due to PID rollover. 221111910SBrandon.Potter@amd.com */ 221211910SBrandon.Potter@amd.com 221311910SBrandon.Potter@amd.com System *sys = tc->getSystemPtr(); 221411910SBrandon.Potter@amd.com Process *tgt_proc = nullptr; 221511910SBrandon.Potter@amd.com for (int i = 0; i < sys->numContexts(); i++) { 221611910SBrandon.Potter@amd.com Process *temp = sys->threadContexts[i]->getProcessPtr(); 221711910SBrandon.Potter@amd.com if (temp->pid() == tid) { 221811910SBrandon.Potter@amd.com tgt_proc = temp; 221911910SBrandon.Potter@amd.com break; 222011910SBrandon.Potter@amd.com } 222111910SBrandon.Potter@amd.com } 222211910SBrandon.Potter@amd.com 222311910SBrandon.Potter@amd.com if (sig != 0 || sig != OS::TGT_SIGABRT) 222411910SBrandon.Potter@amd.com return -EINVAL; 222511910SBrandon.Potter@amd.com 222611910SBrandon.Potter@amd.com if (tgt_proc == nullptr) 222711910SBrandon.Potter@amd.com return -ESRCH; 222811910SBrandon.Potter@amd.com 222911910SBrandon.Potter@amd.com if (tgid != -1 && tgt_proc->tgid() != tgid) 223011910SBrandon.Potter@amd.com return -ESRCH; 223111910SBrandon.Potter@amd.com 223211910SBrandon.Potter@amd.com if (sig == OS::TGT_SIGABRT) 223311910SBrandon.Potter@amd.com exitGroupFunc(desc, 252, process, tc); 223411910SBrandon.Potter@amd.com 223511910SBrandon.Potter@amd.com return 0; 223611910SBrandon.Potter@amd.com} 223711910SBrandon.Potter@amd.com 223813568Sbrandon.potter@amd.comtemplate <class OS> 223913568Sbrandon.potter@amd.comSyscallReturn 224013568Sbrandon.potter@amd.comsocketFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 224113568Sbrandon.potter@amd.com{ 224213568Sbrandon.potter@amd.com int index = 0; 224313568Sbrandon.potter@amd.com int domain = p->getSyscallArg(tc, index); 224413568Sbrandon.potter@amd.com int type = p->getSyscallArg(tc, index); 224513568Sbrandon.potter@amd.com int prot = p->getSyscallArg(tc, index); 224613568Sbrandon.potter@amd.com 224713568Sbrandon.potter@amd.com int sim_fd = socket(domain, type, prot); 224813568Sbrandon.potter@amd.com if (sim_fd == -1) 224913568Sbrandon.potter@amd.com return -errno; 225013568Sbrandon.potter@amd.com 225113568Sbrandon.potter@amd.com auto sfdp = std::make_shared<SocketFDEntry>(sim_fd, domain, type, prot); 225213568Sbrandon.potter@amd.com int tgt_fd = p->fds->allocFD(sfdp); 225313568Sbrandon.potter@amd.com 225413568Sbrandon.potter@amd.com return tgt_fd; 225513568Sbrandon.potter@amd.com} 225613568Sbrandon.potter@amd.com 225713568Sbrandon.potter@amd.comtemplate <class OS> 225813568Sbrandon.potter@amd.comSyscallReturn 225913568Sbrandon.potter@amd.comsocketpairFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 226013568Sbrandon.potter@amd.com{ 226113568Sbrandon.potter@amd.com int index = 0; 226213568Sbrandon.potter@amd.com int domain = p->getSyscallArg(tc, index); 226313568Sbrandon.potter@amd.com int type = p->getSyscallArg(tc, index); 226413568Sbrandon.potter@amd.com int prot = p->getSyscallArg(tc, index); 226513568Sbrandon.potter@amd.com Addr svPtr = p->getSyscallArg(tc, index); 226613568Sbrandon.potter@amd.com 226713568Sbrandon.potter@amd.com BufferArg svBuf((Addr)svPtr, 2 * sizeof(int)); 226813568Sbrandon.potter@amd.com int status = socketpair(domain, type, prot, (int *)svBuf.bufferPtr()); 226913568Sbrandon.potter@amd.com if (status == -1) 227013568Sbrandon.potter@amd.com return -errno; 227113568Sbrandon.potter@amd.com 227213568Sbrandon.potter@amd.com int *fds = (int *)svBuf.bufferPtr(); 227313568Sbrandon.potter@amd.com 227413568Sbrandon.potter@amd.com auto sfdp1 = std::make_shared<SocketFDEntry>(fds[0], domain, type, prot); 227513568Sbrandon.potter@amd.com fds[0] = p->fds->allocFD(sfdp1); 227613568Sbrandon.potter@amd.com auto sfdp2 = std::make_shared<SocketFDEntry>(fds[1], domain, type, prot); 227713568Sbrandon.potter@amd.com fds[1] = p->fds->allocFD(sfdp2); 227813568Sbrandon.potter@amd.com svBuf.copyOut(tc->getMemProxy()); 227913568Sbrandon.potter@amd.com 228013568Sbrandon.potter@amd.com return status; 228113568Sbrandon.potter@amd.com} 22822553SN/A 228313570Sbrandon.potter@amd.comtemplate <class OS> 228413570Sbrandon.potter@amd.comSyscallReturn 228513570Sbrandon.potter@amd.comselectFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 228613570Sbrandon.potter@amd.com{ 228713570Sbrandon.potter@amd.com int retval; 228813570Sbrandon.potter@amd.com 228913570Sbrandon.potter@amd.com int index = 0; 229013570Sbrandon.potter@amd.com int nfds_t = p->getSyscallArg(tc, index); 229113570Sbrandon.potter@amd.com Addr fds_read_ptr = p->getSyscallArg(tc, index); 229213570Sbrandon.potter@amd.com Addr fds_writ_ptr = p->getSyscallArg(tc, index); 229313570Sbrandon.potter@amd.com Addr fds_excp_ptr = p->getSyscallArg(tc, index); 229413570Sbrandon.potter@amd.com Addr time_val_ptr = p->getSyscallArg(tc, index); 229513570Sbrandon.potter@amd.com 229613570Sbrandon.potter@amd.com TypedBufferArg<typename OS::fd_set> rd_t(fds_read_ptr); 229713570Sbrandon.potter@amd.com TypedBufferArg<typename OS::fd_set> wr_t(fds_writ_ptr); 229813570Sbrandon.potter@amd.com TypedBufferArg<typename OS::fd_set> ex_t(fds_excp_ptr); 229913570Sbrandon.potter@amd.com TypedBufferArg<typename OS::timeval> tp(time_val_ptr); 230013570Sbrandon.potter@amd.com 230113570Sbrandon.potter@amd.com /** 230213570Sbrandon.potter@amd.com * Host fields. Notice that these use the definitions from the system 230313570Sbrandon.potter@amd.com * headers instead of the gem5 headers and libraries. If the host and 230413570Sbrandon.potter@amd.com * target have different header file definitions, this will not work. 230513570Sbrandon.potter@amd.com */ 230613570Sbrandon.potter@amd.com fd_set rd_h; 230713570Sbrandon.potter@amd.com FD_ZERO(&rd_h); 230813570Sbrandon.potter@amd.com fd_set wr_h; 230913570Sbrandon.potter@amd.com FD_ZERO(&wr_h); 231013570Sbrandon.potter@amd.com fd_set ex_h; 231113570Sbrandon.potter@amd.com FD_ZERO(&ex_h); 231213570Sbrandon.potter@amd.com 231313570Sbrandon.potter@amd.com /** 231413570Sbrandon.potter@amd.com * Copy in the fd_set from the target. 231513570Sbrandon.potter@amd.com */ 231613570Sbrandon.potter@amd.com if (fds_read_ptr) 231713570Sbrandon.potter@amd.com rd_t.copyIn(tc->getMemProxy()); 231813570Sbrandon.potter@amd.com if (fds_writ_ptr) 231913570Sbrandon.potter@amd.com wr_t.copyIn(tc->getMemProxy()); 232013570Sbrandon.potter@amd.com if (fds_excp_ptr) 232113570Sbrandon.potter@amd.com ex_t.copyIn(tc->getMemProxy()); 232213570Sbrandon.potter@amd.com 232313570Sbrandon.potter@amd.com /** 232413570Sbrandon.potter@amd.com * We need to translate the target file descriptor set into a host file 232513570Sbrandon.potter@amd.com * descriptor set. This involves both our internal process fd array 232613570Sbrandon.potter@amd.com * and the fd_set defined in Linux header files. The nfds field also 232713570Sbrandon.potter@amd.com * needs to be updated as it will be only target specific after 232813570Sbrandon.potter@amd.com * retrieving it from the target; the nfds value is expected to be the 232913570Sbrandon.potter@amd.com * highest file descriptor that needs to be checked, so we need to extend 233013570Sbrandon.potter@amd.com * it out for nfds_h when we do the update. 233113570Sbrandon.potter@amd.com */ 233213570Sbrandon.potter@amd.com int nfds_h = 0; 233313570Sbrandon.potter@amd.com std::map<int, int> trans_map; 233413570Sbrandon.potter@amd.com auto try_add_host_set = [&](fd_set *tgt_set_entry, 233513570Sbrandon.potter@amd.com fd_set *hst_set_entry, 233613570Sbrandon.potter@amd.com int iter) -> bool 233713570Sbrandon.potter@amd.com { 233813570Sbrandon.potter@amd.com /** 233913570Sbrandon.potter@amd.com * By this point, we know that we are looking at a valid file 234013570Sbrandon.potter@amd.com * descriptor set on the target. We need to check if the target file 234113570Sbrandon.potter@amd.com * descriptor value passed in as iter is part of the set. 234213570Sbrandon.potter@amd.com */ 234313570Sbrandon.potter@amd.com if (FD_ISSET(iter, tgt_set_entry)) { 234413570Sbrandon.potter@amd.com /** 234513570Sbrandon.potter@amd.com * We know that the target file descriptor belongs to the set, 234613570Sbrandon.potter@amd.com * but we do not yet know if the file descriptor is valid or 234713570Sbrandon.potter@amd.com * that we have a host mapping. Check that now. 234813570Sbrandon.potter@amd.com */ 234913570Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[iter]); 235013570Sbrandon.potter@amd.com if (!hbfdp) 235113570Sbrandon.potter@amd.com return true; 235213570Sbrandon.potter@amd.com auto sim_fd = hbfdp->getSimFD(); 235313570Sbrandon.potter@amd.com 235413570Sbrandon.potter@amd.com /** 235513570Sbrandon.potter@amd.com * Add the sim_fd to tgt_fd translation into trans_map for use 235613570Sbrandon.potter@amd.com * later when we need to zero the target fd_set structures and 235713570Sbrandon.potter@amd.com * then update them with hits returned from the host select call. 235813570Sbrandon.potter@amd.com */ 235913570Sbrandon.potter@amd.com trans_map[sim_fd] = iter; 236013570Sbrandon.potter@amd.com 236113570Sbrandon.potter@amd.com /** 236213570Sbrandon.potter@amd.com * We know that the host file descriptor exists so now we check 236313570Sbrandon.potter@amd.com * if we need to update the max count for nfds_h before passing 236413570Sbrandon.potter@amd.com * the duplicated structure into the host. 236513570Sbrandon.potter@amd.com */ 236613570Sbrandon.potter@amd.com nfds_h = std::max(nfds_h - 1, sim_fd + 1); 236713570Sbrandon.potter@amd.com 236813570Sbrandon.potter@amd.com /** 236913570Sbrandon.potter@amd.com * Add the host file descriptor to the set that we are going to 237013570Sbrandon.potter@amd.com * pass into the host. 237113570Sbrandon.potter@amd.com */ 237213570Sbrandon.potter@amd.com FD_SET(sim_fd, hst_set_entry); 237313570Sbrandon.potter@amd.com } 237413570Sbrandon.potter@amd.com return false; 237513570Sbrandon.potter@amd.com }; 237613570Sbrandon.potter@amd.com 237713570Sbrandon.potter@amd.com for (int i = 0; i < nfds_t; i++) { 237813570Sbrandon.potter@amd.com if (fds_read_ptr) { 237913570Sbrandon.potter@amd.com bool ebadf = try_add_host_set((fd_set*)&*rd_t, &rd_h, i); 238013570Sbrandon.potter@amd.com if (ebadf) return -EBADF; 238113570Sbrandon.potter@amd.com } 238213570Sbrandon.potter@amd.com if (fds_writ_ptr) { 238313570Sbrandon.potter@amd.com bool ebadf = try_add_host_set((fd_set*)&*wr_t, &wr_h, i); 238413570Sbrandon.potter@amd.com if (ebadf) return -EBADF; 238513570Sbrandon.potter@amd.com } 238613570Sbrandon.potter@amd.com if (fds_excp_ptr) { 238713570Sbrandon.potter@amd.com bool ebadf = try_add_host_set((fd_set*)&*ex_t, &ex_h, i); 238813570Sbrandon.potter@amd.com if (ebadf) return -EBADF; 238913570Sbrandon.potter@amd.com } 239013570Sbrandon.potter@amd.com } 239113570Sbrandon.potter@amd.com 239213570Sbrandon.potter@amd.com if (time_val_ptr) { 239313570Sbrandon.potter@amd.com /** 239413570Sbrandon.potter@amd.com * It might be possible to decrement the timeval based on some 239513570Sbrandon.potter@amd.com * derivation of wall clock determined from elapsed simulator ticks 239613570Sbrandon.potter@amd.com * but that seems like overkill. Rather, we just set the timeval with 239713570Sbrandon.potter@amd.com * zero timeout. (There is no reason to block during the simulation 239813570Sbrandon.potter@amd.com * as it only decreases simulator performance.) 239913570Sbrandon.potter@amd.com */ 240013570Sbrandon.potter@amd.com tp->tv_sec = 0; 240113570Sbrandon.potter@amd.com tp->tv_usec = 0; 240213570Sbrandon.potter@amd.com 240313570Sbrandon.potter@amd.com retval = select(nfds_h, 240413570Sbrandon.potter@amd.com fds_read_ptr ? &rd_h : nullptr, 240513570Sbrandon.potter@amd.com fds_writ_ptr ? &wr_h : nullptr, 240613570Sbrandon.potter@amd.com fds_excp_ptr ? &ex_h : nullptr, 240713570Sbrandon.potter@amd.com (timeval*)&*tp); 240813570Sbrandon.potter@amd.com } else { 240913570Sbrandon.potter@amd.com /** 241013570Sbrandon.potter@amd.com * If the timeval pointer is null, setup a new timeval structure to 241113570Sbrandon.potter@amd.com * pass into the host select call. Unfortunately, we will need to 241213570Sbrandon.potter@amd.com * manually check the return value and throw a retry fault if the 241313570Sbrandon.potter@amd.com * return value is zero. Allowing the system call to block will 241413570Sbrandon.potter@amd.com * likely deadlock the event queue. 241513570Sbrandon.potter@amd.com */ 241613570Sbrandon.potter@amd.com struct timeval tv = { 0, 0 }; 241713570Sbrandon.potter@amd.com 241813570Sbrandon.potter@amd.com retval = select(nfds_h, 241913570Sbrandon.potter@amd.com fds_read_ptr ? &rd_h : nullptr, 242013570Sbrandon.potter@amd.com fds_writ_ptr ? &wr_h : nullptr, 242113570Sbrandon.potter@amd.com fds_excp_ptr ? &ex_h : nullptr, 242213570Sbrandon.potter@amd.com &tv); 242313570Sbrandon.potter@amd.com 242413570Sbrandon.potter@amd.com if (retval == 0) { 242513570Sbrandon.potter@amd.com /** 242613570Sbrandon.potter@amd.com * If blocking indefinitely, check the signal list to see if a 242713570Sbrandon.potter@amd.com * signal would break the poll out of the retry cycle and try to 242813570Sbrandon.potter@amd.com * return the signal interrupt instead. 242913570Sbrandon.potter@amd.com */ 243013570Sbrandon.potter@amd.com for (auto sig : tc->getSystemPtr()->signalList) 243113570Sbrandon.potter@amd.com if (sig.receiver == p) 243213570Sbrandon.potter@amd.com return -EINTR; 243313570Sbrandon.potter@amd.com return SyscallReturn::retry(); 243413570Sbrandon.potter@amd.com } 243513570Sbrandon.potter@amd.com } 243613570Sbrandon.potter@amd.com 243713570Sbrandon.potter@amd.com if (retval == -1) 243813570Sbrandon.potter@amd.com return -errno; 243913570Sbrandon.potter@amd.com 244013570Sbrandon.potter@amd.com FD_ZERO((fd_set*)&*rd_t); 244113570Sbrandon.potter@amd.com FD_ZERO((fd_set*)&*wr_t); 244213570Sbrandon.potter@amd.com FD_ZERO((fd_set*)&*ex_t); 244313570Sbrandon.potter@amd.com 244413570Sbrandon.potter@amd.com /** 244513570Sbrandon.potter@amd.com * We need to translate the host file descriptor set into a target file 244613570Sbrandon.potter@amd.com * descriptor set. This involves both our internal process fd array 244713570Sbrandon.potter@amd.com * and the fd_set defined in header files. 244813570Sbrandon.potter@amd.com */ 244913570Sbrandon.potter@amd.com for (int i = 0; i < nfds_h; i++) { 245013570Sbrandon.potter@amd.com if (fds_read_ptr) { 245113570Sbrandon.potter@amd.com if (FD_ISSET(i, &rd_h)) 245213570Sbrandon.potter@amd.com FD_SET(trans_map[i], (fd_set*)&*rd_t); 245313570Sbrandon.potter@amd.com } 245413570Sbrandon.potter@amd.com 245513570Sbrandon.potter@amd.com if (fds_writ_ptr) { 245613570Sbrandon.potter@amd.com if (FD_ISSET(i, &wr_h)) 245713570Sbrandon.potter@amd.com FD_SET(trans_map[i], (fd_set*)&*wr_t); 245813570Sbrandon.potter@amd.com } 245913570Sbrandon.potter@amd.com 246013570Sbrandon.potter@amd.com if (fds_excp_ptr) { 246113570Sbrandon.potter@amd.com if (FD_ISSET(i, &ex_h)) 246213570Sbrandon.potter@amd.com FD_SET(trans_map[i], (fd_set*)&*ex_t); 246313570Sbrandon.potter@amd.com } 246413570Sbrandon.potter@amd.com } 246513570Sbrandon.potter@amd.com 246613570Sbrandon.potter@amd.com if (fds_read_ptr) 246713570Sbrandon.potter@amd.com rd_t.copyOut(tc->getMemProxy()); 246813570Sbrandon.potter@amd.com if (fds_writ_ptr) 246913570Sbrandon.potter@amd.com wr_t.copyOut(tc->getMemProxy()); 247013570Sbrandon.potter@amd.com if (fds_excp_ptr) 247113570Sbrandon.potter@amd.com ex_t.copyOut(tc->getMemProxy()); 247213570Sbrandon.potter@amd.com if (time_val_ptr) 247313570Sbrandon.potter@amd.com tp.copyOut(tc->getMemProxy()); 247413570Sbrandon.potter@amd.com 247513570Sbrandon.potter@amd.com return retval; 247613570Sbrandon.potter@amd.com} 247713570Sbrandon.potter@amd.com 247813570Sbrandon.potter@amd.comtemplate <class OS> 247913570Sbrandon.potter@amd.comSyscallReturn 248013570Sbrandon.potter@amd.comreadFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 248113570Sbrandon.potter@amd.com{ 248213570Sbrandon.potter@amd.com int index = 0; 248313570Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 248413570Sbrandon.potter@amd.com Addr buf_ptr = p->getSyscallArg(tc, index); 248513570Sbrandon.potter@amd.com int nbytes = p->getSyscallArg(tc, index); 248613570Sbrandon.potter@amd.com 248713570Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 248813570Sbrandon.potter@amd.com if (!hbfdp) 248913570Sbrandon.potter@amd.com return -EBADF; 249013570Sbrandon.potter@amd.com int sim_fd = hbfdp->getSimFD(); 249113570Sbrandon.potter@amd.com 249213570Sbrandon.potter@amd.com struct pollfd pfd; 249313570Sbrandon.potter@amd.com pfd.fd = sim_fd; 249413570Sbrandon.potter@amd.com pfd.events = POLLIN | POLLPRI; 249513570Sbrandon.potter@amd.com if ((poll(&pfd, 1, 0) == 0) 249613570Sbrandon.potter@amd.com && !(hbfdp->getFlags() & OS::TGT_O_NONBLOCK)) 249713570Sbrandon.potter@amd.com return SyscallReturn::retry(); 249813570Sbrandon.potter@amd.com 249913570Sbrandon.potter@amd.com BufferArg buf_arg(buf_ptr, nbytes); 250013570Sbrandon.potter@amd.com int bytes_read = read(sim_fd, buf_arg.bufferPtr(), nbytes); 250113570Sbrandon.potter@amd.com 250213570Sbrandon.potter@amd.com if (bytes_read > 0) 250313570Sbrandon.potter@amd.com buf_arg.copyOut(tc->getMemProxy()); 250413570Sbrandon.potter@amd.com 250513570Sbrandon.potter@amd.com return (bytes_read == -1) ? -errno : bytes_read; 250613570Sbrandon.potter@amd.com} 250713570Sbrandon.potter@amd.com 250813570Sbrandon.potter@amd.comtemplate <class OS> 250913570Sbrandon.potter@amd.comSyscallReturn 251013570Sbrandon.potter@amd.comwriteFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 251113570Sbrandon.potter@amd.com{ 251213570Sbrandon.potter@amd.com int index = 0; 251313570Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 251413570Sbrandon.potter@amd.com Addr buf_ptr = p->getSyscallArg(tc, index); 251513570Sbrandon.potter@amd.com int nbytes = p->getSyscallArg(tc, index); 251613570Sbrandon.potter@amd.com 251713570Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 251813570Sbrandon.potter@amd.com if (!hbfdp) 251913570Sbrandon.potter@amd.com return -EBADF; 252013570Sbrandon.potter@amd.com int sim_fd = hbfdp->getSimFD(); 252113570Sbrandon.potter@amd.com 252213570Sbrandon.potter@amd.com BufferArg buf_arg(buf_ptr, nbytes); 252313570Sbrandon.potter@amd.com buf_arg.copyIn(tc->getMemProxy()); 252413570Sbrandon.potter@amd.com 252513570Sbrandon.potter@amd.com struct pollfd pfd; 252613570Sbrandon.potter@amd.com pfd.fd = sim_fd; 252713570Sbrandon.potter@amd.com pfd.events = POLLOUT; 252813570Sbrandon.potter@amd.com 252913570Sbrandon.potter@amd.com /** 253013570Sbrandon.potter@amd.com * We don't want to poll on /dev/random. The kernel will not enable the 253113570Sbrandon.potter@amd.com * file descriptor for writing unless the entropy in the system falls 253213570Sbrandon.potter@amd.com * below write_wakeup_threshold. This is not guaranteed to happen 253313570Sbrandon.potter@amd.com * depending on host settings. 253413570Sbrandon.potter@amd.com */ 253513570Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(hbfdp); 253613570Sbrandon.potter@amd.com if (ffdp && (ffdp->getFileName() != "/dev/random")) { 253713570Sbrandon.potter@amd.com if (!poll(&pfd, 1, 0) && !(ffdp->getFlags() & OS::TGT_O_NONBLOCK)) 253813570Sbrandon.potter@amd.com return SyscallReturn::retry(); 253913570Sbrandon.potter@amd.com } 254013570Sbrandon.potter@amd.com 254113570Sbrandon.potter@amd.com int bytes_written = write(sim_fd, buf_arg.bufferPtr(), nbytes); 254213570Sbrandon.potter@amd.com 254313570Sbrandon.potter@amd.com if (bytes_written != -1) 254413570Sbrandon.potter@amd.com fsync(sim_fd); 254513570Sbrandon.potter@amd.com 254613570Sbrandon.potter@amd.com return (bytes_written == -1) ? -errno : bytes_written; 254713570Sbrandon.potter@amd.com} 254813570Sbrandon.potter@amd.com 254913570Sbrandon.potter@amd.comtemplate <class OS> 255013570Sbrandon.potter@amd.comSyscallReturn 255113570Sbrandon.potter@amd.comwait4Func(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 255213570Sbrandon.potter@amd.com{ 255313570Sbrandon.potter@amd.com int index = 0; 255413570Sbrandon.potter@amd.com pid_t pid = p->getSyscallArg(tc, index); 255513570Sbrandon.potter@amd.com Addr statPtr = p->getSyscallArg(tc, index); 255613570Sbrandon.potter@amd.com int options = p->getSyscallArg(tc, index); 255713570Sbrandon.potter@amd.com Addr rusagePtr = p->getSyscallArg(tc, index); 255813570Sbrandon.potter@amd.com 255913570Sbrandon.potter@amd.com if (rusagePtr) 256013570Sbrandon.potter@amd.com DPRINTFR(SyscallVerbose, 256113570Sbrandon.potter@amd.com "%d: %s: syscall wait4: rusage pointer provided however " 256213570Sbrandon.potter@amd.com "functionality not supported. Ignoring rusage pointer.\n", 256313570Sbrandon.potter@amd.com curTick(), tc->getCpuPtr()->name()); 256413570Sbrandon.potter@amd.com 256513570Sbrandon.potter@amd.com /** 256613570Sbrandon.potter@amd.com * Currently, wait4 is only implemented so that it will wait for children 256713570Sbrandon.potter@amd.com * exit conditions which are denoted by a SIGCHLD signals posted into the 256813570Sbrandon.potter@amd.com * system signal list. We return no additional information via any of the 256913570Sbrandon.potter@amd.com * parameters supplied to wait4. If nothing is found in the system signal 257013570Sbrandon.potter@amd.com * list, we will wait indefinitely for SIGCHLD to post by retrying the 257113570Sbrandon.potter@amd.com * call. 257213570Sbrandon.potter@amd.com */ 257313570Sbrandon.potter@amd.com System *sysh = tc->getSystemPtr(); 257413570Sbrandon.potter@amd.com std::list<BasicSignal>::iterator iter; 257513570Sbrandon.potter@amd.com for (iter=sysh->signalList.begin(); iter!=sysh->signalList.end(); iter++) { 257613570Sbrandon.potter@amd.com if (iter->receiver == p) { 257713570Sbrandon.potter@amd.com if (pid < -1) { 257813570Sbrandon.potter@amd.com if ((iter->sender->pgid() == -pid) 257913570Sbrandon.potter@amd.com && (iter->signalValue == OS::TGT_SIGCHLD)) 258013570Sbrandon.potter@amd.com goto success; 258113570Sbrandon.potter@amd.com } else if (pid == -1) { 258213570Sbrandon.potter@amd.com if (iter->signalValue == OS::TGT_SIGCHLD) 258313570Sbrandon.potter@amd.com goto success; 258413570Sbrandon.potter@amd.com } else if (pid == 0) { 258513570Sbrandon.potter@amd.com if ((iter->sender->pgid() == p->pgid()) 258613570Sbrandon.potter@amd.com && (iter->signalValue == OS::TGT_SIGCHLD)) 258713570Sbrandon.potter@amd.com goto success; 258813570Sbrandon.potter@amd.com } else { 258913570Sbrandon.potter@amd.com if ((iter->sender->pid() == pid) 259013570Sbrandon.potter@amd.com && (iter->signalValue == OS::TGT_SIGCHLD)) 259113570Sbrandon.potter@amd.com goto success; 259213570Sbrandon.potter@amd.com } 259313570Sbrandon.potter@amd.com } 259413570Sbrandon.potter@amd.com } 259513570Sbrandon.potter@amd.com 259613570Sbrandon.potter@amd.com return (options & OS::TGT_WNOHANG) ? 0 : SyscallReturn::retry(); 259713570Sbrandon.potter@amd.com 259813570Sbrandon.potter@amd.comsuccess: 259913570Sbrandon.potter@amd.com // Set status to EXITED for WIFEXITED evaluations. 260013570Sbrandon.potter@amd.com const int EXITED = 0; 260113570Sbrandon.potter@amd.com BufferArg statusBuf(statPtr, sizeof(int)); 260213570Sbrandon.potter@amd.com *(int *)statusBuf.bufferPtr() = EXITED; 260313570Sbrandon.potter@amd.com statusBuf.copyOut(tc->getMemProxy()); 260413570Sbrandon.potter@amd.com 260513570Sbrandon.potter@amd.com // Return the child PID. 260613570Sbrandon.potter@amd.com pid_t retval = iter->sender->pid(); 260713570Sbrandon.potter@amd.com sysh->signalList.erase(iter); 260813570Sbrandon.potter@amd.com return retval; 260913570Sbrandon.potter@amd.com} 261013570Sbrandon.potter@amd.com 261113570Sbrandon.potter@amd.comtemplate <class OS> 261213570Sbrandon.potter@amd.comSyscallReturn 261313570Sbrandon.potter@amd.comacceptFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 261413570Sbrandon.potter@amd.com{ 261513570Sbrandon.potter@amd.com struct sockaddr sa; 261613570Sbrandon.potter@amd.com socklen_t addrLen; 261713570Sbrandon.potter@amd.com int host_fd; 261813570Sbrandon.potter@amd.com int index = 0; 261913570Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 262013570Sbrandon.potter@amd.com Addr addrPtr = p->getSyscallArg(tc, index); 262113570Sbrandon.potter@amd.com Addr lenPtr = p->getSyscallArg(tc, index); 262213570Sbrandon.potter@amd.com 262313570Sbrandon.potter@amd.com BufferArg *lenBufPtr = nullptr; 262413570Sbrandon.potter@amd.com BufferArg *addrBufPtr = nullptr; 262513570Sbrandon.potter@amd.com 262613570Sbrandon.potter@amd.com auto sfdp = std::dynamic_pointer_cast<SocketFDEntry>((*p->fds)[tgt_fd]); 262713570Sbrandon.potter@amd.com if (!sfdp) 262813570Sbrandon.potter@amd.com return -EBADF; 262913570Sbrandon.potter@amd.com int sim_fd = sfdp->getSimFD(); 263013570Sbrandon.potter@amd.com 263113570Sbrandon.potter@amd.com /** 263213570Sbrandon.potter@amd.com * We poll the socket file descriptor first to guarantee that we do not 263313570Sbrandon.potter@amd.com * block on our accept call. The socket can be opened without the 263413570Sbrandon.potter@amd.com * non-blocking flag (it blocks). This will cause deadlocks between 263513570Sbrandon.potter@amd.com * communicating processes. 263613570Sbrandon.potter@amd.com */ 263713570Sbrandon.potter@amd.com struct pollfd pfd; 263813570Sbrandon.potter@amd.com pfd.fd = sim_fd; 263913570Sbrandon.potter@amd.com pfd.events = POLLIN | POLLPRI; 264013570Sbrandon.potter@amd.com if ((poll(&pfd, 1, 0) == 0) 264113570Sbrandon.potter@amd.com && !(sfdp->getFlags() & OS::TGT_O_NONBLOCK)) 264213570Sbrandon.potter@amd.com return SyscallReturn::retry(); 264313570Sbrandon.potter@amd.com 264413570Sbrandon.potter@amd.com if (lenPtr) { 264513570Sbrandon.potter@amd.com lenBufPtr = new BufferArg(lenPtr, sizeof(socklen_t)); 264613570Sbrandon.potter@amd.com lenBufPtr->copyIn(tc->getMemProxy()); 264713570Sbrandon.potter@amd.com memcpy(&addrLen, (socklen_t *)lenBufPtr->bufferPtr(), 264813570Sbrandon.potter@amd.com sizeof(socklen_t)); 264913570Sbrandon.potter@amd.com } 265013570Sbrandon.potter@amd.com 265113570Sbrandon.potter@amd.com if (addrPtr) { 265213570Sbrandon.potter@amd.com addrBufPtr = new BufferArg(addrPtr, sizeof(struct sockaddr)); 265313570Sbrandon.potter@amd.com addrBufPtr->copyIn(tc->getMemProxy()); 265413570Sbrandon.potter@amd.com memcpy(&sa, (struct sockaddr *)addrBufPtr->bufferPtr(), 265513570Sbrandon.potter@amd.com sizeof(struct sockaddr)); 265613570Sbrandon.potter@amd.com } 265713570Sbrandon.potter@amd.com 265813570Sbrandon.potter@amd.com host_fd = accept(sim_fd, &sa, &addrLen); 265913570Sbrandon.potter@amd.com 266013570Sbrandon.potter@amd.com if (host_fd == -1) 266113570Sbrandon.potter@amd.com return -errno; 266213570Sbrandon.potter@amd.com 266313570Sbrandon.potter@amd.com if (addrPtr) { 266413570Sbrandon.potter@amd.com memcpy(addrBufPtr->bufferPtr(), &sa, sizeof(sa)); 266513570Sbrandon.potter@amd.com addrBufPtr->copyOut(tc->getMemProxy()); 266613570Sbrandon.potter@amd.com delete(addrBufPtr); 266713570Sbrandon.potter@amd.com } 266813570Sbrandon.potter@amd.com 266913570Sbrandon.potter@amd.com if (lenPtr) { 267013570Sbrandon.potter@amd.com *(socklen_t *)lenBufPtr->bufferPtr() = addrLen; 267113570Sbrandon.potter@amd.com lenBufPtr->copyOut(tc->getMemProxy()); 267213570Sbrandon.potter@amd.com delete(lenBufPtr); 267313570Sbrandon.potter@amd.com } 267413570Sbrandon.potter@amd.com 267513570Sbrandon.potter@amd.com auto afdp = std::make_shared<SocketFDEntry>(host_fd, sfdp->_domain, 267613570Sbrandon.potter@amd.com sfdp->_type, sfdp->_protocol); 267713570Sbrandon.potter@amd.com return p->fds->allocFD(afdp); 267813570Sbrandon.potter@amd.com} 267913570Sbrandon.potter@amd.com 26801354SN/A#endif // __SIM_SYSCALL_EMUL_HH__ 2681