syscall_emul.hh revision 13902
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 <net/if.h> 8211383Sbrandon.potter@amd.com#include <poll.h> 8313568Sbrandon.potter@amd.com#include <sys/ioctl.h> 843113Sgblack@eecs.umich.edu#include <sys/mman.h> 8511799Sbrandon.potter@amd.com#include <sys/socket.h> 8611759Sbrandon.potter@amd.com#include <sys/stat.h> 8711812Sbaz21@cam.ac.uk 8811812Sbaz21@cam.ac.uk#if (NO_STATFS == 0) 8911799Sbrandon.potter@amd.com#include <sys/statfs.h> 908229Snate@binkert.org 9113570Sbrandon.potter@amd.com#else 928229Snate@binkert.org#include <sys/mount.h> 9311594Santhony.gutierrez@amd.com 947075Snate@binkert.org#endif 958229Snate@binkert.org#include <sys/time.h> 9611856Sbrandon.potter@amd.com#include <sys/types.h> 977075Snate@binkert.org#include <sys/uio.h> 98360SN/A#include <unistd.h> 9912461Sgabeblack@google.com 10011886Sbrandon.potter@amd.com#include <cerrno> 10111800Sbrandon.potter@amd.com#include <memory> 10211392Sbrandon.potter@amd.com#include <string> 10312334Sgabeblack@google.com 1041354SN/A#include "arch/generic/tlb.hh" 1056216Snate@binkert.org#include "arch/utility.hh" 1066658Snate@binkert.org#include "base/intmath.hh" 1072474SN/A#include "base/loader/object_file.hh" 1082680Sktlim@umich.edu#include "base/logging.hh" 1098229Snate@binkert.org#include "base/trace.hh" 11011886Sbrandon.potter@amd.com#include "base/types.hh" 11110496Ssteve.reinhardt@amd.com#include "config/the_isa.hh" 11211911SBrandon.Potter@amd.com#include "cpu/base.hh" 1138229Snate@binkert.org#include "cpu/thread_context.hh" 11411794Sbrandon.potter@amd.com#include "mem/page_table.hh" 11511886Sbrandon.potter@amd.com#include "params/Process.hh" 11610497Ssteve.reinhardt@amd.com#include "sim/emul_driver.hh" 11711794Sbrandon.potter@amd.com#include "sim/futex_map.hh" 118360SN/A#include "sim/process.hh" 11913629SAndrea.Mondelli@ucf.edu#include "sim/syscall_debug_macros.hh" 12013629SAndrea.Mondelli@ucf.edu#include "sim/syscall_desc.hh" 12113629SAndrea.Mondelli@ucf.edu#include "sim/syscall_emul_buf.hh" 12213629SAndrea.Mondelli@ucf.edu#include "sim/syscall_return.hh" 123360SN/A 124360SN/A#if defined(__APPLE__) && defined(__MACH__) && !defined(CMSG_ALIGN) 125360SN/A#define CMSG_ALIGN(len) (((len) + sizeof(size_t) - 1) & ~(sizeof(size_t) - 1)) 126360SN/A#endif 127360SN/A 128360SN/A////////////////////////////////////////////////////////////////////// 129360SN/A// 130360SN/A// The following emulation functions are generic enough that they 131360SN/A// don't need to be recompiled for different emulated OS's. They are 132378SN/A// defined in sim/syscall_emul.cc. 1331706SN/A// 13411851Sbrandon.potter@amd.com////////////////////////////////////////////////////////////////////// 135378SN/A 136378SN/A 137378SN/A/// Handler for unimplemented syscalls that we haven't thought about. 138378SN/ASyscallReturn unimplementedFunc(SyscallDesc *desc, int num, 139378SN/A Process *p, ThreadContext *tc); 1401706SN/A 14111851Sbrandon.potter@amd.com/// Handler for unimplemented syscalls that we never intend to 142360SN/A/// implement (signal handling, etc.) and should not affect the correct 14311760Sbrandon.potter@amd.com/// behavior of the program. Print a warning only if the appropriate 14411760Sbrandon.potter@amd.com/// trace flag is enabled. Return success to the target program. 14511851Sbrandon.potter@amd.comSyscallReturn ignoreFunc(SyscallDesc *desc, int num, 14611760Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 1476109Ssanchezd@stanford.edu 1481706SN/A// Target fallocateFunc() handler. 14911851Sbrandon.potter@amd.comSyscallReturn fallocateFunc(SyscallDesc *desc, int num, 150378SN/A Process *p, ThreadContext *tc); 1516109Ssanchezd@stanford.edu 1526109Ssanchezd@stanford.edu/// Target exit() handler: terminate current context. 15311851Sbrandon.potter@amd.comSyscallReturn exitFunc(SyscallDesc *desc, int num, 1546109Ssanchezd@stanford.edu Process *p, ThreadContext *tc); 15511886Sbrandon.potter@amd.com 15611886Sbrandon.potter@amd.com/// Target exit_group() handler: terminate simulation. (exit all threads) 15711886Sbrandon.potter@amd.comSyscallReturn exitGroupFunc(SyscallDesc *desc, int num, 15811886Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 159378SN/A 1601706SN/A/// Target set_tid_address() handler. 16111851Sbrandon.potter@amd.comSyscallReturn setTidAddressFunc(SyscallDesc *desc, int num, 162378SN/A Process *p, ThreadContext *tc); 1635748SSteve.Reinhardt@amd.com 1645748SSteve.Reinhardt@amd.com/// Target getpagesize() handler. 16511851Sbrandon.potter@amd.comSyscallReturn getpagesizeFunc(SyscallDesc *desc, int num, 166378SN/A Process *p, ThreadContext *tc); 167378SN/A 1681706SN/A/// Target brk() handler: set brk address. 16911851Sbrandon.potter@amd.comSyscallReturn brkFunc(SyscallDesc *desc, int num, 170378SN/A Process *p, ThreadContext *tc); 171378SN/A 1721706SN/A/// Target close() handler. 17311851Sbrandon.potter@amd.comSyscallReturn closeFunc(SyscallDesc *desc, int num, 174378SN/A Process *p, ThreadContext *tc); 1754118Sgblack@eecs.umich.edu 1764118Sgblack@eecs.umich.edu/// Target lseek() handler. 17711851Sbrandon.potter@amd.comSyscallReturn lseekFunc(SyscallDesc *desc, int num, 1784118Sgblack@eecs.umich.edu Process *p, ThreadContext *tc); 179378SN/A 1801706SN/A/// Target _llseek() handler. 18111851Sbrandon.potter@amd.comSyscallReturn _llseekFunc(SyscallDesc *desc, int num, 182378SN/A Process *p, ThreadContext *tc); 18313568Sbrandon.potter@amd.com 18413568Sbrandon.potter@amd.com/// Target munmap() handler. 18513568Sbrandon.potter@amd.comSyscallReturn munmapFunc(SyscallDesc *desc, int num, 18613568Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 187378SN/A 1881706SN/A/// Target shutdown() handler. 18911851Sbrandon.potter@amd.comSyscallReturn shutdownFunc(SyscallDesc *desc, int num, 190360SN/A Process *p, ThreadContext *tc); 1915513SMichael.Adler@intel.com 1925513SMichael.Adler@intel.com/// Target gethostname() handler. 19311851Sbrandon.potter@amd.comSyscallReturn gethostnameFunc(SyscallDesc *desc, int num, 1945513SMichael.Adler@intel.com Process *p, ThreadContext *tc); 19510203SAli.Saidi@ARM.com 19610203SAli.Saidi@ARM.com/// Target getcwd() handler. 19711851Sbrandon.potter@amd.comSyscallReturn getcwdFunc(SyscallDesc *desc, int num, 19810203SAli.Saidi@ARM.com Process *p, ThreadContext *tc); 1995513SMichael.Adler@intel.com 20011851Sbrandon.potter@amd.com/// Target readlink() handler. 2015513SMichael.Adler@intel.comSyscallReturn readlinkFunc(SyscallDesc *desc, int num, 202511SN/A Process *p, ThreadContext *tc, 20310633Smichaelupton@gmail.com int index = 0); 20411851Sbrandon.potter@amd.comSyscallReturn readlinkFunc(SyscallDesc *desc, int num, 20510633Smichaelupton@gmail.com Process *p, ThreadContext *tc); 2061706SN/A 20711851Sbrandon.potter@amd.com/// Target unlink() handler. 208511SN/ASyscallReturn unlinkHelper(SyscallDesc *desc, int num, 20912795Smattdsinclair@gmail.com Process *p, ThreadContext *tc, 21012795Smattdsinclair@gmail.com int index); 21112795Smattdsinclair@gmail.comSyscallReturn unlinkFunc(SyscallDesc *desc, int num, 21212795Smattdsinclair@gmail.com Process *p, ThreadContext *tc); 21312796Smattdsinclair@gmail.com 21412796Smattdsinclair@gmail.com/// Target link() handler 21512796Smattdsinclair@gmail.comSyscallReturn linkFunc(SyscallDesc *desc, int num, Process *p, 21612796Smattdsinclair@gmail.com ThreadContext *tc); 2175513SMichael.Adler@intel.com 2185513SMichael.Adler@intel.com/// Target symlink() handler. 21911851Sbrandon.potter@amd.comSyscallReturn symlinkFunc(SyscallDesc *desc, int num, Process *p, 2205513SMichael.Adler@intel.com ThreadContext *tc); 22113031Sbrandon.potter@amd.com 22213031Sbrandon.potter@amd.com/// Target mkdir() handler. 22313031Sbrandon.potter@amd.comSyscallReturn mkdirFunc(SyscallDesc *desc, int num, 22413031Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 22513031Sbrandon.potter@amd.com 22613031Sbrandon.potter@amd.com/// Target mknod() handler. 22713031Sbrandon.potter@amd.comSyscallReturn mknodFunc(SyscallDesc *desc, int num, 22813031Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 22913031Sbrandon.potter@amd.com 23013031Sbrandon.potter@amd.com/// Target chdir() handler. 23113031Sbrandon.potter@amd.comSyscallReturn chdirFunc(SyscallDesc *desc, int num, 23213031Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 233511SN/A 2341706SN/A// Target rmdir() handler. 23511851Sbrandon.potter@amd.comSyscallReturn rmdirFunc(SyscallDesc *desc, int num, 2361706SN/A Process *p, ThreadContext *tc); 2371706SN/A 2381706SN/A/// Target rename() handler. 2391706SN/ASyscallReturn renameFunc(SyscallDesc *desc, int num, 24011851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2411706SN/A 2421706SN/A 2431706SN/A/// Target truncate() handler. 2441706SN/ASyscallReturn truncateFunc(SyscallDesc *desc, int num, 24511851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2461706SN/A 247511SN/A 2486703Svince@csl.cornell.edu/// Target ftruncate() handler. 2496703Svince@csl.cornell.eduSyscallReturn ftruncateFunc(SyscallDesc *desc, int num, 25011851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2516703Svince@csl.cornell.edu 2526685Stjones1@inf.ed.ac.uk 2536685Stjones1@inf.ed.ac.uk/// Target truncate64() handler. 25411851Sbrandon.potter@amd.comSyscallReturn truncate64Func(SyscallDesc *desc, int num, 2556685Stjones1@inf.ed.ac.uk Process *p, ThreadContext *tc); 2566685Stjones1@inf.ed.ac.uk 2575513SMichael.Adler@intel.com/// Target ftruncate64() handler. 2585513SMichael.Adler@intel.comSyscallReturn ftruncate64Func(SyscallDesc *desc, int num, 25911851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2605513SMichael.Adler@intel.com 26111885Sbrandon.potter@amd.com 26211885Sbrandon.potter@amd.com/// Target umask() handler. 26311885Sbrandon.potter@amd.comSyscallReturn umaskFunc(SyscallDesc *desc, int num, 2645513SMichael.Adler@intel.com Process *p, ThreadContext *tc); 2651999SN/A 2661999SN/A/// Target gettid() handler. 26711851Sbrandon.potter@amd.comSyscallReturn gettidFunc(SyscallDesc *desc, int num, 2681999SN/A Process *p, ThreadContext *tc); 26911885Sbrandon.potter@amd.com 27011885Sbrandon.potter@amd.com/// Target chown() handler. 27111885Sbrandon.potter@amd.comSyscallReturn chownFunc(SyscallDesc *desc, int num, 2721999SN/A Process *p, ThreadContext *tc); 2731999SN/A 2741999SN/A/// Target setpgid() handler. 27511851Sbrandon.potter@amd.comSyscallReturn setpgidFunc(SyscallDesc *desc, int num, 2761999SN/A Process *p, ThreadContext *tc); 2773079Sstever@eecs.umich.edu 2783079Sstever@eecs.umich.edu/// Target fchown() handler. 27911851Sbrandon.potter@amd.comSyscallReturn fchownFunc(SyscallDesc *desc, int num, 2803079Sstever@eecs.umich.edu Process *p, ThreadContext *tc); 28111908SBrandon.Potter@amd.com 28211908SBrandon.Potter@amd.com/// Target dup() handler. 28311908SBrandon.Potter@amd.comSyscallReturn dupFunc(SyscallDesc *desc, int num, 28411908SBrandon.Potter@amd.com Process *process, ThreadContext *tc); 28511875Sbrandon.potter@amd.com 2862093SN/A/// Target dup2() handler. 28711851Sbrandon.potter@amd.comSyscallReturn dup2Func(SyscallDesc *desc, int num, 2882093SN/A Process *process, ThreadContext *tc); 2892687Sksewell@umich.edu 2902687Sksewell@umich.edu/// Target fcntl() handler. 29111851Sbrandon.potter@amd.comSyscallReturn fcntlFunc(SyscallDesc *desc, int num, 2922687Sksewell@umich.edu Process *process, ThreadContext *tc); 2932238SN/A 2942238SN/A/// Target fcntl64() handler. 29511851Sbrandon.potter@amd.comSyscallReturn fcntl64Func(SyscallDesc *desc, int num, 2962238SN/A Process *process, ThreadContext *tc); 29711908SBrandon.Potter@amd.com 29811908SBrandon.Potter@amd.com/// Target setuid() handler. 29911908SBrandon.Potter@amd.comSyscallReturn setuidFunc(SyscallDesc *desc, int num, 30011908SBrandon.Potter@amd.com Process *p, ThreadContext *tc); 30111908SBrandon.Potter@amd.com 30211908SBrandon.Potter@amd.com/// Target pipe() handler. 30311908SBrandon.Potter@amd.comSyscallReturn pipeFunc(SyscallDesc *desc, int num, 30411908SBrandon.Potter@amd.com Process *p, ThreadContext *tc); 3052238SN/A 3062238SN/A/// Internal pipe() handler. 30711851Sbrandon.potter@amd.comSyscallReturn pipeImpl(SyscallDesc *desc, int num, Process *p, 3082238SN/A ThreadContext *tc, bool pseudoPipe); 30913571Sbrandon.potter@amd.com 31013571Sbrandon.potter@amd.com/// Target getpid() handler. 31113571Sbrandon.potter@amd.comSyscallReturn getpidFunc(SyscallDesc *desc, int num, 31213571Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 31313568Sbrandon.potter@amd.com 31413568Sbrandon.potter@amd.com// Target getpeername() handler. 31513568Sbrandon.potter@amd.comSyscallReturn getpeernameFunc(SyscallDesc *desc, int num, 31613568Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 31713568Sbrandon.potter@amd.com 31813568Sbrandon.potter@amd.com// Target bind() handler. 31913568Sbrandon.potter@amd.comSyscallReturn bindFunc(SyscallDesc *desc, int num, 32013568Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 32113568Sbrandon.potter@amd.com 32213568Sbrandon.potter@amd.com// Target listen() handler. 32313568Sbrandon.potter@amd.comSyscallReturn listenFunc(SyscallDesc *desc, int num, 32413568Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 32513448Sciro.santilli@arm.com 32613031Sbrandon.potter@amd.com// Target connect() handler. 32713031Sbrandon.potter@amd.comSyscallReturn connectFunc(SyscallDesc *desc, int num, 32813031Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 32913448Sciro.santilli@arm.com 33013031Sbrandon.potter@amd.com#if defined(SYS_getdents) 33113539Sjavier.setoain@arm.com// Target getdents() handler. 33213539Sjavier.setoain@arm.comSyscallReturn getdentsFunc(SyscallDesc *desc, int num, 33313539Sjavier.setoain@arm.com Process *p, ThreadContext *tc); 33413539Sjavier.setoain@arm.com#endif 33513539Sjavier.setoain@arm.com 33613539Sjavier.setoain@arm.com#if defined(SYS_getdents64) 33713569Sbrandon.potter@amd.com// Target getdents() handler. 33813569Sbrandon.potter@amd.comSyscallReturn getdents64Func(SyscallDesc *desc, int num, 33913569Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 34013569Sbrandon.potter@amd.com#endif 34113569Sbrandon.potter@amd.com 34213569Sbrandon.potter@amd.com// Target sendto() handler. 34313569Sbrandon.potter@amd.comSyscallReturn sendtoFunc(SyscallDesc *desc, int num, 34413569Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 34513569Sbrandon.potter@amd.com 34613569Sbrandon.potter@amd.com// Target recvfrom() handler. 34713569Sbrandon.potter@amd.comSyscallReturn recvfromFunc(SyscallDesc *desc, int num, 34813569Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 34913569Sbrandon.potter@amd.com 35013569Sbrandon.potter@amd.com// Target recvmsg() handler. 35113569Sbrandon.potter@amd.comSyscallReturn recvmsgFunc(SyscallDesc *desc, int num, 35213569Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 35313031Sbrandon.potter@amd.com 3542238SN/A// Target sendmsg() handler. 35511851Sbrandon.potter@amd.comSyscallReturn sendmsgFunc(SyscallDesc *desc, int num, 3562238SN/A Process *p, ThreadContext *tc); 3572238SN/A 3582238SN/A// Target getuid() handler. 35911851Sbrandon.potter@amd.comSyscallReturn getuidFunc(SyscallDesc *desc, int num, 3602238SN/A Process *p, ThreadContext *tc); 3612238SN/A 3622238SN/A/// Target getgid() handler. 36311851Sbrandon.potter@amd.comSyscallReturn getgidFunc(SyscallDesc *desc, int num, 3642238SN/A Process *p, ThreadContext *tc); 3652238SN/A 3662238SN/A/// Target getppid() handler. 36711851Sbrandon.potter@amd.comSyscallReturn getppidFunc(SyscallDesc *desc, int num, 3682238SN/A Process *p, ThreadContext *tc); 3692238SN/A 3702238SN/A/// Target geteuid() handler. 37111851Sbrandon.potter@amd.comSyscallReturn geteuidFunc(SyscallDesc *desc, int num, 3722238SN/A Process *p, ThreadContext *tc); 3739455Smitch.hayenga+gem5@gmail.com 3749455Smitch.hayenga+gem5@gmail.com/// Target getegid() handler. 37511851Sbrandon.potter@amd.comSyscallReturn getegidFunc(SyscallDesc *desc, int num, 37610203SAli.Saidi@ARM.com Process *p, ThreadContext *tc); 37711851Sbrandon.potter@amd.com 37811851Sbrandon.potter@amd.com/// Target access() handler 3799455Smitch.hayenga+gem5@gmail.comSyscallReturn accessFunc(SyscallDesc *desc, int num, 38013571Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 38113571Sbrandon.potter@amd.comSyscallReturn accessFunc(SyscallDesc *desc, int num, 38213571Sbrandon.potter@amd.com Process *p, ThreadContext *tc, 38313571Sbrandon.potter@amd.com int index); 38413571Sbrandon.potter@amd.com 38513571Sbrandon.potter@amd.com// Target getsockopt() handler. 38613571Sbrandon.potter@amd.comSyscallReturn getsockoptFunc(SyscallDesc *desc, int num, 38713571Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 38813571Sbrandon.potter@amd.com 38913571Sbrandon.potter@amd.com// Target setsockopt() handler. 39013571Sbrandon.potter@amd.comSyscallReturn setsockoptFunc(SyscallDesc *desc, int num, 39113571Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3929112Smarc.orr@gmail.com 39311906SBrandon.Potter@amd.com// Target getsockname() handler. 39411906SBrandon.Potter@amd.comSyscallReturn getsocknameFunc(SyscallDesc *desc, int num, 3959112Smarc.orr@gmail.com Process *p, ThreadContext *tc); 3969112Smarc.orr@gmail.com 39711851Sbrandon.potter@amd.com/// Futex system call 3989112Smarc.orr@gmail.com/// Implemented by Daniel Sanchez 3999112Smarc.orr@gmail.com/// Used by printf's in multi-threaded apps 40011911SBrandon.Potter@amd.comtemplate <class OS> 4019112Smarc.orr@gmail.comSyscallReturn 40211911SBrandon.Potter@amd.comfutexFunc(SyscallDesc *desc, int callnum, Process *process, 40311911SBrandon.Potter@amd.com ThreadContext *tc) 40411911SBrandon.Potter@amd.com{ 40511911SBrandon.Potter@amd.com using namespace std; 40613642Sqtt2@cornell.edu 40713642Sqtt2@cornell.edu int index = 0; 40813642Sqtt2@cornell.edu Addr uaddr = process->getSyscallArg(tc, index); 4099112Smarc.orr@gmail.com int op = process->getSyscallArg(tc, index); 41011911SBrandon.Potter@amd.com int val = process->getSyscallArg(tc, index); 41111911SBrandon.Potter@amd.com int timeout M5_VAR_USED = process->getSyscallArg(tc, index); 41211911SBrandon.Potter@amd.com Addr uaddr2 M5_VAR_USED = process->getSyscallArg(tc, index); 41311911SBrandon.Potter@amd.com int val3 = process->getSyscallArg(tc, index); 4149238Slluc.alvarez@bsc.es 41513642Sqtt2@cornell.edu /* 4169112Smarc.orr@gmail.com * Unsupported option that does not affect the correctness of the 41711911SBrandon.Potter@amd.com * application. This is a performance optimization utilized by Linux. 4189112Smarc.orr@gmail.com */ 41913642Sqtt2@cornell.edu op &= ~OS::TGT_FUTEX_PRIVATE_FLAG; 42011911SBrandon.Potter@amd.com op &= ~OS::TGT_FUTEX_CLOCK_REALTIME_FLAG; 42111911SBrandon.Potter@amd.com 42211911SBrandon.Potter@amd.com FutexMap &futex_map = tc->getSystemPtr()->futexMap; 42311911SBrandon.Potter@amd.com 4249112Smarc.orr@gmail.com if (OS::TGT_FUTEX_WAIT == op || OS::TGT_FUTEX_WAIT_BITSET == op) { 42511911SBrandon.Potter@amd.com // Ensure futex system call accessed atomically. 42611911SBrandon.Potter@amd.com BufferArg buf(uaddr, sizeof(int)); 42711911SBrandon.Potter@amd.com buf.copyIn(tc->getMemProxy()); 42811911SBrandon.Potter@amd.com int mem_val = *(int*)buf.bufferPtr(); 42911911SBrandon.Potter@amd.com 43011911SBrandon.Potter@amd.com /* 4319112Smarc.orr@gmail.com * The value in memory at uaddr is not equal with the expected val 4329112Smarc.orr@gmail.com * (a different thread must have changed it before the system call was 43313642Sqtt2@cornell.edu * invoked). In this case, we need to throw an error. 43413642Sqtt2@cornell.edu */ 43513642Sqtt2@cornell.edu if (val != mem_val) 43613642Sqtt2@cornell.edu return -OS::TGT_EWOULDBLOCK; 43713642Sqtt2@cornell.edu 43811911SBrandon.Potter@amd.com if (OS::TGT_FUTEX_WAIT) { 4399112Smarc.orr@gmail.com futex_map.suspend(uaddr, process->tgid(), tc); 44011911SBrandon.Potter@amd.com } else { 44111911SBrandon.Potter@amd.com futex_map.suspend_bitset(uaddr, process->tgid(), tc, val3); 44213642Sqtt2@cornell.edu } 44313642Sqtt2@cornell.edu 4449112Smarc.orr@gmail.com return 0; 4459112Smarc.orr@gmail.com } else if (OS::TGT_FUTEX_WAKE == op) { 44611911SBrandon.Potter@amd.com return futex_map.wakeup(uaddr, process->tgid(), val); 44711911SBrandon.Potter@amd.com } else if (OS::TGT_FUTEX_WAKE_BITSET == op) { 4489112Smarc.orr@gmail.com return futex_map.wakeup_bitset(uaddr, process->tgid(), val3); 4499112Smarc.orr@gmail.com } else if (OS::TGT_FUTEX_REQUEUE == op || 4502238SN/A OS::TGT_FUTEX_CMP_REQUEUE == op) { 4512238SN/A 4522238SN/A // Ensure futex system call accessed atomically. 4532238SN/A BufferArg buf(uaddr, sizeof(int)); 45411851Sbrandon.potter@amd.com buf.copyIn(tc->getMemProxy()); 4552238SN/A int mem_val = *(int*)buf.bufferPtr(); 4562238SN/A /* 4572238SN/A * For CMP_REQUEUE, the whole operation is only started only if 45811851Sbrandon.potter@amd.com * val3 is still the value of the futex pointed to by uaddr. 4592238SN/A */ 4602238SN/A if (OS::TGT_FUTEX_CMP_REQUEUE && val3 != mem_val) 4612238SN/A return -OS::TGT_EWOULDBLOCK; 46211851Sbrandon.potter@amd.com return futex_map.requeue(uaddr, process->tgid(), val, timeout, uaddr2); 4632238SN/A } else if (OS::TGT_FUTEX_WAKE_OP == op) { 4642238SN/A /* 4652238SN/A * The FUTEX_WAKE_OP operation is equivalent to executing the 46611851Sbrandon.potter@amd.com * following code atomically and totally ordered with respect to 4672238SN/A * other futex operations on any of the two supplied futex words: 4682238SN/A * 4691354SN/A * int oldval = *(int *) addr2; 4701354SN/A * *(int *) addr2 = oldval op oparg; 47110796Sbrandon.potter@amd.com * futex(addr1, FUTEX_WAKE, val, 0, 0, 0); 47210796Sbrandon.potter@amd.com * if (oldval cmp cmparg) 4731354SN/A * futex(addr2, FUTEX_WAKE, val2, 0, 0, 0); 4741354SN/A * 4751354SN/A * (op, oparg, cmp, cmparg are encoded in val3) 4761354SN/A * 4771354SN/A * +---+---+-----------+-----------+ 4781354SN/A * |op |cmp| oparg | cmparg | 4791354SN/A * +---+---+-----------+-----------+ 4801354SN/A * 4 4 12 12 <== # of bits 4811354SN/A * 4821354SN/A * reference: http://man7.org/linux/man-pages/man2/futex.2.html 48310796Sbrandon.potter@amd.com * 4841354SN/A */ 48510796Sbrandon.potter@amd.com // get value from simulated-space 4861354SN/A BufferArg buf(uaddr2, sizeof(int)); 4871354SN/A buf.copyIn(tc->getMemProxy()); 4881354SN/A int oldval = *(int*)buf.bufferPtr(); 4891354SN/A int newval = oldval; 49010796Sbrandon.potter@amd.com // extract op, oparg, cmp, cmparg from val3 49110796Sbrandon.potter@amd.com int wake_cmparg = val3 & 0xfff; 49210796Sbrandon.potter@amd.com int wake_oparg = (val3 & 0xfff000) >> 12; 49310796Sbrandon.potter@amd.com int wake_cmp = (val3 & 0xf000000) >> 24; 49410796Sbrandon.potter@amd.com int wake_op = (val3 & 0xf0000000) >> 28; 49510796Sbrandon.potter@amd.com if ((wake_op & OS::TGT_FUTEX_OP_ARG_SHIFT) >> 3 == 1) 49610796Sbrandon.potter@amd.com wake_oparg = (1 << wake_oparg); 49710796Sbrandon.potter@amd.com wake_op &= ~OS::TGT_FUTEX_OP_ARG_SHIFT; 49810796Sbrandon.potter@amd.com // perform operation on the value of the second futex 49910796Sbrandon.potter@amd.com if (wake_op == OS::TGT_FUTEX_OP_SET) 50010796Sbrandon.potter@amd.com newval = wake_oparg; 501360SN/A else if (wake_op == OS::TGT_FUTEX_OP_ADD) 502360SN/A newval += wake_oparg; 503360SN/A else if (wake_op == OS::TGT_FUTEX_OP_OR) 504360SN/A newval |= wake_oparg; 505360SN/A else if (wake_op == OS::TGT_FUTEX_OP_ANDN) 506360SN/A newval &= ~wake_oparg; 507360SN/A else if (wake_op == OS::TGT_FUTEX_OP_XOR) 50811759Sbrandon.potter@amd.com newval ^= wake_oparg; 5093113Sgblack@eecs.umich.edu // copy updated value back to simulated-space 5103113Sgblack@eecs.umich.edu *(int*)buf.bufferPtr() = newval; 5113113Sgblack@eecs.umich.edu buf.copyOut(tc->getMemProxy()); 5123113Sgblack@eecs.umich.edu // perform the first wake-up 5133113Sgblack@eecs.umich.edu int woken1 = futex_map.wakeup(uaddr, process->tgid(), val); 5143113Sgblack@eecs.umich.edu int woken2 = 0; 5153113Sgblack@eecs.umich.edu // calculate the condition of the second wake-up 5163113Sgblack@eecs.umich.edu bool is_wake2 = false; 5173113Sgblack@eecs.umich.edu if (wake_cmp == OS::TGT_FUTEX_OP_CMP_EQ) 5183113Sgblack@eecs.umich.edu is_wake2 = oldval == wake_cmparg; 5193113Sgblack@eecs.umich.edu else if (wake_cmp == OS::TGT_FUTEX_OP_CMP_NE) 5203113Sgblack@eecs.umich.edu is_wake2 = oldval != wake_cmparg; 5213113Sgblack@eecs.umich.edu else if (wake_cmp == OS::TGT_FUTEX_OP_CMP_LT) 52212032Sandreas.sandberg@arm.com is_wake2 = oldval < wake_cmparg; 5233113Sgblack@eecs.umich.edu else if (wake_cmp == OS::TGT_FUTEX_OP_CMP_LE) 5243113Sgblack@eecs.umich.edu is_wake2 = oldval <= wake_cmparg; 5254189Sgblack@eecs.umich.edu else if (wake_cmp == OS::TGT_FUTEX_OP_CMP_GT) 5264189Sgblack@eecs.umich.edu is_wake2 = oldval > wake_cmparg; 5273113Sgblack@eecs.umich.edu else if (wake_cmp == OS::TGT_FUTEX_OP_CMP_GE) 5283113Sgblack@eecs.umich.edu is_wake2 = oldval >= wake_cmparg; 5293113Sgblack@eecs.umich.edu // perform the second wake-up 5303113Sgblack@eecs.umich.edu if (is_wake2) 5318737Skoansin.tan@gmail.com woken2 = futex_map.wakeup(uaddr2, process->tgid(), timeout); 5323113Sgblack@eecs.umich.edu 5338737Skoansin.tan@gmail.com return woken1 + woken2; 5343277Sgblack@eecs.umich.edu } 5355515SMichael.Adler@intel.com warn("futex: op %d not implemented; ignoring.", op); 5365515SMichael.Adler@intel.com return -ENOSYS; 5375515SMichael.Adler@intel.com} 5385515SMichael.Adler@intel.com 5395515SMichael.Adler@intel.com 5408737Skoansin.tan@gmail.com/// Pseudo Funcs - These functions use a different return convension, 5413277Sgblack@eecs.umich.edu/// returning a second value in a register other than the normal return register 5428737Skoansin.tan@gmail.comSyscallReturn pipePseudoFunc(SyscallDesc *desc, int num, 5433277Sgblack@eecs.umich.edu Process *process, ThreadContext *tc); 5448737Skoansin.tan@gmail.com 5453277Sgblack@eecs.umich.edu/// Target getpidPseudo() handler. 5468737Skoansin.tan@gmail.comSyscallReturn getpidPseudoFunc(SyscallDesc *desc, int num, 5473113Sgblack@eecs.umich.edu Process *p, ThreadContext *tc); 5483113Sgblack@eecs.umich.edu 5493113Sgblack@eecs.umich.edu/// Target getuidPseudo() handler. 5503113Sgblack@eecs.umich.eduSyscallReturn getuidPseudoFunc(SyscallDesc *desc, int num, 5518737Skoansin.tan@gmail.com Process *p, ThreadContext *tc); 5523113Sgblack@eecs.umich.edu 5538737Skoansin.tan@gmail.com/// Target getgidPseudo() handler. 5543114Sgblack@eecs.umich.eduSyscallReturn getgidPseudoFunc(SyscallDesc *desc, int num, 5558737Skoansin.tan@gmail.com Process *p, ThreadContext *tc); 5563114Sgblack@eecs.umich.edu 5578737Skoansin.tan@gmail.com 5583114Sgblack@eecs.umich.edu/// A readable name for 1,000,000, for converting microseconds to seconds. 5598737Skoansin.tan@gmail.comconst int one_million = 1000000; 56011906SBrandon.Potter@amd.com/// A readable name for 1,000,000,000, for converting nanoseconds to seconds. 5614061Sgblack@eecs.umich.educonst int one_billion = 1000000000; 5624061Sgblack@eecs.umich.edu 5638737Skoansin.tan@gmail.com/// Approximate seconds since the epoch (1/1/1970). About a billion, 5643113Sgblack@eecs.umich.edu/// by my reckoning. We want to keep this a constant (not use the 5658737Skoansin.tan@gmail.com/// real-world time) to keep simulations repeatable. 5663113Sgblack@eecs.umich.educonst unsigned seconds_since_epoch = 1000000000; 5673113Sgblack@eecs.umich.edu 5683113Sgblack@eecs.umich.edu/// Helper function to convert current elapsed time to seconds and 5693113Sgblack@eecs.umich.edu/// microseconds. 5703113Sgblack@eecs.umich.edutemplate <class T1, class T2> 57112032Sandreas.sandberg@arm.comvoid 5723113Sgblack@eecs.umich.edugetElapsedTimeMicro(T1 &sec, T2 &usec) 5733113Sgblack@eecs.umich.edu{ 5744189Sgblack@eecs.umich.edu uint64_t elapsed_usecs = curTick() / SimClock::Int::us; 5754189Sgblack@eecs.umich.edu sec = elapsed_usecs / one_million; 5763113Sgblack@eecs.umich.edu usec = elapsed_usecs % one_million; 5773113Sgblack@eecs.umich.edu} 5783113Sgblack@eecs.umich.edu 5798737Skoansin.tan@gmail.com/// Helper function to convert current elapsed time to seconds and 5803113Sgblack@eecs.umich.edu/// nanoseconds. 5818737Skoansin.tan@gmail.comtemplate <class T1, class T2> 5823113Sgblack@eecs.umich.eduvoid 5838737Skoansin.tan@gmail.comgetElapsedTimeNano(T1 &sec, T2 &nsec) 5843113Sgblack@eecs.umich.edu{ 5853113Sgblack@eecs.umich.edu uint64_t elapsed_nsecs = curTick() / SimClock::Int::ns; 5863113Sgblack@eecs.umich.edu sec = elapsed_nsecs / one_billion; 5873113Sgblack@eecs.umich.edu nsec = elapsed_nsecs % one_billion; 5883113Sgblack@eecs.umich.edu} 5893113Sgblack@eecs.umich.edu 5903113Sgblack@eecs.umich.edu////////////////////////////////////////////////////////////////////// 59111906SBrandon.Potter@amd.com// 5923113Sgblack@eecs.umich.edu// The following emulation functions are generic, but need to be 59312032Sandreas.sandberg@arm.com// templated to account for differences in types, constants, etc. 5948852Sandreas.hansson@arm.com// 59511906SBrandon.Potter@amd.com////////////////////////////////////////////////////////////////////// 5963113Sgblack@eecs.umich.edu 5973113Sgblack@eecs.umich.edu typedef struct statfs hst_statfs; 5983113Sgblack@eecs.umich.edu#if NO_STAT64 5993113Sgblack@eecs.umich.edu typedef struct stat hst_stat; 6003113Sgblack@eecs.umich.edu typedef struct stat hst_stat64; 6013113Sgblack@eecs.umich.edu#else 6023113Sgblack@eecs.umich.edu typedef struct stat hst_stat; 6033113Sgblack@eecs.umich.edu typedef struct stat64 hst_stat64; 60412032Sandreas.sandberg@arm.com#endif 6058852Sandreas.hansson@arm.com 60611906SBrandon.Potter@amd.com//// Helper function to convert a host stat buffer to a target stat 6073113Sgblack@eecs.umich.edu//// buffer. Also copies the target buffer out to the simulated 6083113Sgblack@eecs.umich.edu//// memory space. Used by stat(), fstat(), and lstat(). 6093113Sgblack@eecs.umich.edu 6106686Stjones1@inf.ed.ac.uktemplate <typename target_stat, typename host_stat> 6113113Sgblack@eecs.umich.eduvoid 6123113Sgblack@eecs.umich.educonvertStatBuf(target_stat &tgt, host_stat *host, bool fakeTTY = false) 6133113Sgblack@eecs.umich.edu{ 61411759Sbrandon.potter@amd.com using namespace TheISA; 61512032Sandreas.sandberg@arm.com 61611759Sbrandon.potter@amd.com if (fakeTTY) 61711759Sbrandon.potter@amd.com tgt->st_dev = 0xA; 61811759Sbrandon.potter@amd.com else 61911759Sbrandon.potter@amd.com tgt->st_dev = host->st_dev; 62011759Sbrandon.potter@amd.com tgt->st_dev = TheISA::htog(tgt->st_dev); 62111812Sbaz21@cam.ac.uk tgt->st_ino = host->st_ino; 62211812Sbaz21@cam.ac.uk tgt->st_ino = TheISA::htog(tgt->st_ino); 62311812Sbaz21@cam.ac.uk tgt->st_mode = host->st_mode; 62411759Sbrandon.potter@amd.com if (fakeTTY) { 62511812Sbaz21@cam.ac.uk // Claim to be a character device 62611759Sbrandon.potter@amd.com tgt->st_mode &= ~S_IFMT; // Clear S_IFMT 62711759Sbrandon.potter@amd.com tgt->st_mode |= S_IFCHR; // Set S_IFCHR 62811759Sbrandon.potter@amd.com } 62911759Sbrandon.potter@amd.com tgt->st_mode = TheISA::htog(tgt->st_mode); 63011759Sbrandon.potter@amd.com tgt->st_nlink = host->st_nlink; 63111759Sbrandon.potter@amd.com tgt->st_nlink = TheISA::htog(tgt->st_nlink); 63211759Sbrandon.potter@amd.com tgt->st_uid = host->st_uid; 63311812Sbaz21@cam.ac.uk tgt->st_uid = TheISA::htog(tgt->st_uid); 63411812Sbaz21@cam.ac.uk tgt->st_gid = host->st_gid; 63511812Sbaz21@cam.ac.uk tgt->st_gid = TheISA::htog(tgt->st_gid); 63611812Sbaz21@cam.ac.uk if (fakeTTY) 63711812Sbaz21@cam.ac.uk tgt->st_rdev = 0x880d; 63811812Sbaz21@cam.ac.uk else 63911812Sbaz21@cam.ac.uk tgt->st_rdev = host->st_rdev; 64011759Sbrandon.potter@amd.com tgt->st_rdev = TheISA::htog(tgt->st_rdev); 64111759Sbrandon.potter@amd.com tgt->st_size = host->st_size; 64211812Sbaz21@cam.ac.uk tgt->st_size = TheISA::htog(tgt->st_size); 64311812Sbaz21@cam.ac.uk tgt->st_atimeX = host->st_atime; 64411759Sbrandon.potter@amd.com tgt->st_atimeX = TheISA::htog(tgt->st_atimeX); 64511812Sbaz21@cam.ac.uk tgt->st_mtimeX = host->st_mtime; 64611812Sbaz21@cam.ac.uk tgt->st_mtimeX = TheISA::htog(tgt->st_mtimeX); 64711812Sbaz21@cam.ac.uk tgt->st_ctimeX = host->st_ctime; 64811812Sbaz21@cam.ac.uk tgt->st_ctimeX = TheISA::htog(tgt->st_ctimeX); 64911812Sbaz21@cam.ac.uk // Force the block size to be 8KB. This helps to ensure buffered io works 65011812Sbaz21@cam.ac.uk // consistently across different hosts. 65111812Sbaz21@cam.ac.uk tgt->st_blksize = 0x2000; 65211759Sbrandon.potter@amd.com tgt->st_blksize = TheISA::htog(tgt->st_blksize); 65311759Sbrandon.potter@amd.com tgt->st_blocks = host->st_blocks; 65411759Sbrandon.potter@amd.com tgt->st_blocks = TheISA::htog(tgt->st_blocks); 65511759Sbrandon.potter@amd.com} 656378SN/A 657378SN/A// Same for stat64 6589141Smarc.orr@gmail.com 6599141Smarc.orr@gmail.comtemplate <typename target_stat, typename host_stat64> 660360SN/Avoid 6611450SN/AconvertStat64Buf(target_stat &tgt, host_stat64 *host, bool fakeTTY = false) 66211856Sbrandon.potter@amd.com{ 663360SN/A using namespace TheISA; 6646701Sgblack@eecs.umich.edu 66511856Sbrandon.potter@amd.com convertStatBuf<target_stat, host_stat64>(tgt, host, fakeTTY); 66611856Sbrandon.potter@amd.com#if defined(STAT_HAVE_NSEC) 667360SN/A tgt->st_atime_nsec = host->st_atime_nsec; 66810930Sbrandon.potter@amd.com tgt->st_atime_nsec = TheISA::htog(tgt->st_atime_nsec); 669360SN/A tgt->st_mtime_nsec = host->st_mtime_nsec; 67011856Sbrandon.potter@amd.com tgt->st_mtime_nsec = TheISA::htog(tgt->st_mtime_nsec); 67111856Sbrandon.potter@amd.com tgt->st_ctime_nsec = host->st_ctime_nsec; 67210496Ssteve.reinhardt@amd.com tgt->st_ctime_nsec = TheISA::htog(tgt->st_ctime_nsec); 67311856Sbrandon.potter@amd.com#else 67411856Sbrandon.potter@amd.com tgt->st_atime_nsec = 0; 6751458SN/A tgt->st_mtime_nsec = 0; 676360SN/A tgt->st_ctime_nsec = 0; 67711856Sbrandon.potter@amd.com#endif 67811856Sbrandon.potter@amd.com} 67911856Sbrandon.potter@amd.com 68011856Sbrandon.potter@amd.com// Here are a couple of convenience functions 68111856Sbrandon.potter@amd.comtemplate<class OS> 68211856Sbrandon.potter@amd.comvoid 68311856Sbrandon.potter@amd.comcopyOutStatBuf(SETranslatingPortProxy &mem, Addr addr, 68411856Sbrandon.potter@amd.com hst_stat *host, bool fakeTTY = false) 68510496Ssteve.reinhardt@amd.com{ 68611856Sbrandon.potter@amd.com typedef TypedBufferArg<typename OS::tgt_stat> tgt_stat_buf; 68711856Sbrandon.potter@amd.com tgt_stat_buf tgt(addr); 68811856Sbrandon.potter@amd.com convertStatBuf<tgt_stat_buf, hst_stat>(tgt, host, fakeTTY); 68911856Sbrandon.potter@amd.com tgt.copyOut(mem); 69011856Sbrandon.potter@amd.com} 69110930Sbrandon.potter@amd.com 6929141Smarc.orr@gmail.comtemplate<class OS> 693360SN/Avoid 694360SN/AcopyOutStat64Buf(SETranslatingPortProxy &mem, Addr addr, 695360SN/A hst_stat64 *host, bool fakeTTY = false) 69611907SBrandon.Potter@amd.com{ 69711907SBrandon.Potter@amd.com typedef TypedBufferArg<typename OS::tgt_stat64> tgt_stat_buf; 69811907SBrandon.Potter@amd.com tgt_stat_buf tgt(addr); 699360SN/A convertStat64Buf<tgt_stat_buf, hst_stat64>(tgt, host, fakeTTY); 70011907SBrandon.Potter@amd.com tgt.copyOut(mem); 70111907SBrandon.Potter@amd.com} 70211907SBrandon.Potter@amd.com 70311907SBrandon.Potter@amd.comtemplate <class OS> 70411907SBrandon.Potter@amd.comvoid 70511907SBrandon.Potter@amd.comcopyOutStatfsBuf(SETranslatingPortProxy &mem, Addr addr, 70611907SBrandon.Potter@amd.com hst_statfs *host) 70711907SBrandon.Potter@amd.com{ 70811907SBrandon.Potter@amd.com TypedBufferArg<typename OS::tgt_statfs> tgt(addr); 70911907SBrandon.Potter@amd.com 71011907SBrandon.Potter@amd.com tgt->f_type = TheISA::htog(host->f_type); 71111907SBrandon.Potter@amd.com#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) 71211907SBrandon.Potter@amd.com tgt->f_bsize = TheISA::htog(host->f_iosize); 71311907SBrandon.Potter@amd.com#else 714360SN/A tgt->f_bsize = TheISA::htog(host->f_bsize); 71511907SBrandon.Potter@amd.com#endif 7161458SN/A tgt->f_blocks = TheISA::htog(host->f_blocks); 717360SN/A tgt->f_bfree = TheISA::htog(host->f_bfree); 71811907SBrandon.Potter@amd.com tgt->f_bavail = TheISA::htog(host->f_bavail); 71911907SBrandon.Potter@amd.com tgt->f_files = TheISA::htog(host->f_files); 72011907SBrandon.Potter@amd.com tgt->f_ffree = TheISA::htog(host->f_ffree); 72111907SBrandon.Potter@amd.com memcpy(&tgt->f_fsid, &host->f_fsid, sizeof(host->f_fsid)); 72211907SBrandon.Potter@amd.com#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) 72311907SBrandon.Potter@amd.com tgt->f_namelen = TheISA::htog(host->f_namemax); 72411907SBrandon.Potter@amd.com tgt->f_frsize = TheISA::htog(host->f_bsize); 72511907SBrandon.Potter@amd.com#elif defined(__APPLE__) 72611907SBrandon.Potter@amd.com tgt->f_namelen = 0; 72711907SBrandon.Potter@amd.com tgt->f_frsize = 0; 728360SN/A#else 72911907SBrandon.Potter@amd.com tgt->f_namelen = TheISA::htog(host->f_namelen); 73011907SBrandon.Potter@amd.com tgt->f_frsize = TheISA::htog(host->f_frsize); 73111907SBrandon.Potter@amd.com#endif 732360SN/A#if defined(__linux__) 733360SN/A memcpy(&tgt->f_spare, &host->f_spare, sizeof(host->f_spare)); 73411907SBrandon.Potter@amd.com#else 73511907SBrandon.Potter@amd.com /* 73611907SBrandon.Potter@amd.com * The fields are different sizes per OS. Don't bother with 73711907SBrandon.Potter@amd.com * f_spare or f_reserved on non-Linux for now. 738360SN/A */ 73911907SBrandon.Potter@amd.com memset(&tgt->f_spare, 0, sizeof(tgt->f_spare)); 740360SN/A#endif 741360SN/A 74211907SBrandon.Potter@amd.com tgt.copyOut(mem); 7433669Sbinkertn@umich.edu} 74411907SBrandon.Potter@amd.com 74511907SBrandon.Potter@amd.com/// Target ioctl() handler. For the most part, programs call ioctl() 74611907SBrandon.Potter@amd.com/// only to find out if their stdout is a tty, to determine whether to 74711907SBrandon.Potter@amd.com/// do line or block buffering. We always claim that output fds are 74811907SBrandon.Potter@amd.com/// not TTYs to provide repeatable results. 74911907SBrandon.Potter@amd.comtemplate <class OS> 75011907SBrandon.Potter@amd.comSyscallReturn 75111907SBrandon.Potter@amd.comioctlFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 75211907SBrandon.Potter@amd.com{ 75311907SBrandon.Potter@amd.com int index = 0; 75411907SBrandon.Potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 75511907SBrandon.Potter@amd.com unsigned req = p->getSyscallArg(tc, index); 75611907SBrandon.Potter@amd.com 75711907SBrandon.Potter@amd.com DPRINTF(SyscallVerbose, "ioctl(%d, 0x%x, ...)\n", tgt_fd, req); 75811907SBrandon.Potter@amd.com 75911907SBrandon.Potter@amd.com if (OS::isTtyReq(req)) 76011907SBrandon.Potter@amd.com return -ENOTTY; 76111907SBrandon.Potter@amd.com 76211907SBrandon.Potter@amd.com auto dfdp = std::dynamic_pointer_cast<DeviceFDEntry>((*p->fds)[tgt_fd]); 76313371Sciro.santilli@arm.com if (dfdp) { 76411907SBrandon.Potter@amd.com EmulatedDriver *emul_driver = dfdp->getDriver(); 7651706SN/A if (emul_driver) 76611907SBrandon.Potter@amd.com return emul_driver->ioctl(p, tc, req); 76711907SBrandon.Potter@amd.com } 76811907SBrandon.Potter@amd.com 76911907SBrandon.Potter@amd.com auto sfdp = std::dynamic_pointer_cast<SocketFDEntry>((*p->fds)[tgt_fd]); 77011907SBrandon.Potter@amd.com if (sfdp) { 77111907SBrandon.Potter@amd.com int status; 77210496Ssteve.reinhardt@amd.com 77310496Ssteve.reinhardt@amd.com switch (req) { 77411907SBrandon.Potter@amd.com case SIOCGIFCONF: { 77511907SBrandon.Potter@amd.com Addr conf_addr = p->getSyscallArg(tc, index); 77611907SBrandon.Potter@amd.com BufferArg conf_arg(conf_addr, sizeof(ifconf)); 77711907SBrandon.Potter@amd.com conf_arg.copyIn(tc->getMemProxy()); 77811907SBrandon.Potter@amd.com 77911907SBrandon.Potter@amd.com ifconf *conf = (ifconf*)conf_arg.bufferPtr(); 78010496Ssteve.reinhardt@amd.com Addr ifc_buf_addr = (Addr)conf->ifc_buf; 78111907SBrandon.Potter@amd.com BufferArg ifc_buf_arg(ifc_buf_addr, conf->ifc_len); 78211907SBrandon.Potter@amd.com ifc_buf_arg.copyIn(tc->getMemProxy()); 78311907SBrandon.Potter@amd.com 78411907SBrandon.Potter@amd.com conf->ifc_buf = (char*)ifc_buf_arg.bufferPtr(); 78510496Ssteve.reinhardt@amd.com 78610496Ssteve.reinhardt@amd.com status = ioctl(sfdp->getSimFD(), req, conf_arg.bufferPtr()); 78711907SBrandon.Potter@amd.com if (status != -1) { 78811907SBrandon.Potter@amd.com conf->ifc_buf = (char*)ifc_buf_addr; 78911907SBrandon.Potter@amd.com ifc_buf_arg.copyOut(tc->getMemProxy()); 79011907SBrandon.Potter@amd.com conf_arg.copyOut(tc->getMemProxy()); 79111907SBrandon.Potter@amd.com } 79211907SBrandon.Potter@amd.com 79311907SBrandon.Potter@amd.com return status; 79411907SBrandon.Potter@amd.com } 79511907SBrandon.Potter@amd.com case SIOCGIFFLAGS: 79611907SBrandon.Potter@amd.com#ifdef __linux__ 79711907SBrandon.Potter@amd.com case SIOCGIFINDEX: 79811907SBrandon.Potter@amd.com#endif 79911907SBrandon.Potter@amd.com case SIOCGIFNETMASK: 80011907SBrandon.Potter@amd.com case SIOCGIFADDR: 80111907SBrandon.Potter@amd.com#ifdef __linux__ 80211907SBrandon.Potter@amd.com case SIOCGIFHWADDR: 80311907SBrandon.Potter@amd.com#endif 80411907SBrandon.Potter@amd.com case SIOCGIFMTU: { 80511907SBrandon.Potter@amd.com Addr req_addr = p->getSyscallArg(tc, index); 80611907SBrandon.Potter@amd.com BufferArg req_arg(req_addr, sizeof(ifreq)); 80711907SBrandon.Potter@amd.com req_arg.copyIn(tc->getMemProxy()); 80811907SBrandon.Potter@amd.com 80911907SBrandon.Potter@amd.com status = ioctl(sfdp->getSimFD(), req, req_arg.bufferPtr()); 81011907SBrandon.Potter@amd.com if (status != -1) 81111907SBrandon.Potter@amd.com req_arg.copyOut(tc->getMemProxy()); 812360SN/A return status; 81311907SBrandon.Potter@amd.com } 81411907SBrandon.Potter@amd.com } 81511907SBrandon.Potter@amd.com } 81611907SBrandon.Potter@amd.com 81711907SBrandon.Potter@amd.com /** 81811907SBrandon.Potter@amd.com * For lack of a better return code, return ENOTTY. Ideally, we should 81911907SBrandon.Potter@amd.com * return something better here, but at least we issue the warning. 82011907SBrandon.Potter@amd.com */ 82111907SBrandon.Potter@amd.com warn("Unsupported ioctl call (return ENOTTY): ioctl(%d, 0x%x, ...) @ \n", 82211907SBrandon.Potter@amd.com tgt_fd, req, tc->pcState()); 82311907SBrandon.Potter@amd.com return -ENOTTY; 82411907SBrandon.Potter@amd.com} 82511907SBrandon.Potter@amd.com 826360SN/Atemplate <class OS> 827360SN/ASyscallReturn 82810027SChris.Adeniyi-Jones@arm.comopenImpl(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc, 82910027SChris.Adeniyi-Jones@arm.com bool isopenat) 83010027SChris.Adeniyi-Jones@arm.com{ 83111851Sbrandon.potter@amd.com int index = 0; 83210027SChris.Adeniyi-Jones@arm.com int tgt_dirfd = -1; 83310027SChris.Adeniyi-Jones@arm.com 83411907SBrandon.Potter@amd.com /** 83510027SChris.Adeniyi-Jones@arm.com * If using the openat variant, read in the target directory file 83610027SChris.Adeniyi-Jones@arm.com * descriptor from the simulated process. 83710027SChris.Adeniyi-Jones@arm.com */ 83810027SChris.Adeniyi-Jones@arm.com if (isopenat) 83910027SChris.Adeniyi-Jones@arm.com tgt_dirfd = p->getSyscallArg(tc, index); 84011851Sbrandon.potter@amd.com 84111851Sbrandon.potter@amd.com /** 84210027SChris.Adeniyi-Jones@arm.com * Retrieve the simulated process' memory proxy and then read in the path 84311907SBrandon.Potter@amd.com * string from that memory space into the host's working memory space. 84410027SChris.Adeniyi-Jones@arm.com */ 84510027SChris.Adeniyi-Jones@arm.com std::string path; 84610633Smichaelupton@gmail.com if (!tc->getMemProxy().tryReadString(path, p->getSyscallArg(tc, index))) 84710633Smichaelupton@gmail.com return -EFAULT; 84810633Smichaelupton@gmail.com 84911851Sbrandon.potter@amd.com#ifdef __CYGWIN32__ 85010633Smichaelupton@gmail.com int host_flags = O_BINARY; 85110633Smichaelupton@gmail.com#else 85210633Smichaelupton@gmail.com int host_flags = 0; 85310633Smichaelupton@gmail.com#endif 85410633Smichaelupton@gmail.com /** 85510633Smichaelupton@gmail.com * Translate target flags into host flags. Flags exist which are not 85610633Smichaelupton@gmail.com * ported between architectures which can cause check failures. 85710633Smichaelupton@gmail.com */ 85810633Smichaelupton@gmail.com int tgt_flags = p->getSyscallArg(tc, index); 85910633Smichaelupton@gmail.com for (int i = 0; i < OS::NUM_OPEN_FLAGS; i++) { 86010203SAli.Saidi@ARM.com if (tgt_flags & OS::openFlagTable[i].tgtFlag) { 86110203SAli.Saidi@ARM.com tgt_flags &= ~OS::openFlagTable[i].tgtFlag; 86210203SAli.Saidi@ARM.com host_flags |= OS::openFlagTable[i].hostFlag; 86311851Sbrandon.potter@amd.com } 86411851Sbrandon.potter@amd.com } 86510203SAli.Saidi@ARM.com if (tgt_flags) { 86610203SAli.Saidi@ARM.com warn("open%s: cannot decode flags 0x%x", 86710203SAli.Saidi@ARM.com isopenat ? "at" : "", tgt_flags); 86810203SAli.Saidi@ARM.com } 86910203SAli.Saidi@ARM.com#ifdef __CYGWIN32__ 87010203SAli.Saidi@ARM.com host_flags |= O_BINARY; 87110203SAli.Saidi@ARM.com#endif 87210203SAli.Saidi@ARM.com 87310203SAli.Saidi@ARM.com int mode = p->getSyscallArg(tc, index); 87410203SAli.Saidi@ARM.com 87510203SAli.Saidi@ARM.com /** 87611851Sbrandon.potter@amd.com * If the simulated process called open or openat with AT_FDCWD specified, 87711851Sbrandon.potter@amd.com * take the current working directory value which was passed into the 87810203SAli.Saidi@ARM.com * process class as a Python parameter and append the current path to 87910203SAli.Saidi@ARM.com * create a full path. 88010203SAli.Saidi@ARM.com * Otherwise, openat with a valid target directory file descriptor has 88110203SAli.Saidi@ARM.com * been called. If the path option, which was passed in as a parameter, 88210203SAli.Saidi@ARM.com * is not absolute, retrieve the directory file descriptor's path and 88310203SAli.Saidi@ARM.com * prepend it to the path passed in as a parameter. 88410203SAli.Saidi@ARM.com * In every case, we should have a full path (which is relevant to the 88510203SAli.Saidi@ARM.com * host) to work with after this block has been passed. 88610850SGiacomo.Gabrielli@arm.com */ 88710850SGiacomo.Gabrielli@arm.com std::string redir_path = path; 88810850SGiacomo.Gabrielli@arm.com std::string abs_path = path; 88911851Sbrandon.potter@amd.com if (!isopenat || tgt_dirfd == OS::TGT_AT_FDCWD) { 89010850SGiacomo.Gabrielli@arm.com abs_path = p->absolutePath(path, true); 89110850SGiacomo.Gabrielli@arm.com redir_path = p->checkPathRedirect(path); 89210850SGiacomo.Gabrielli@arm.com } else if (!startswith(path, "/")) { 89310850SGiacomo.Gabrielli@arm.com std::shared_ptr<FDEntry> fdep = ((*p->fds)[tgt_dirfd]); 89410850SGiacomo.Gabrielli@arm.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(fdep); 89510850SGiacomo.Gabrielli@arm.com if (!ffdp) 89610850SGiacomo.Gabrielli@arm.com return -EBADF; 89710850SGiacomo.Gabrielli@arm.com abs_path = ffdp->getFileName() + path; 89810850SGiacomo.Gabrielli@arm.com redir_path = p->checkPathRedirect(abs_path); 89910850SGiacomo.Gabrielli@arm.com } 90010850SGiacomo.Gabrielli@arm.com 90110850SGiacomo.Gabrielli@arm.com /** 90210850SGiacomo.Gabrielli@arm.com * Since this is an emulated environment, we create pseudo file 90310850SGiacomo.Gabrielli@arm.com * descriptors for device requests that have been registered with 90410850SGiacomo.Gabrielli@arm.com * the process class through Python; this allows us to create a file 90510850SGiacomo.Gabrielli@arm.com * descriptor for subsequent ioctl or mmap calls. 90610850SGiacomo.Gabrielli@arm.com */ 90710850SGiacomo.Gabrielli@arm.com if (startswith(abs_path, "/dev/")) { 90810850SGiacomo.Gabrielli@arm.com std::string filename = abs_path.substr(strlen("/dev/")); 90910850SGiacomo.Gabrielli@arm.com EmulatedDriver *drv = p->findDriver(filename); 91010850SGiacomo.Gabrielli@arm.com if (drv) { 91110850SGiacomo.Gabrielli@arm.com DPRINTF_SYSCALL(Verbose, "open%s: passing call to " 91210850SGiacomo.Gabrielli@arm.com "driver open with path[%s]\n", 91310850SGiacomo.Gabrielli@arm.com isopenat ? "at" : "", abs_path.c_str()); 91410850SGiacomo.Gabrielli@arm.com return drv->open(p, tc, mode, host_flags); 91510850SGiacomo.Gabrielli@arm.com } 91610850SGiacomo.Gabrielli@arm.com /** 91710850SGiacomo.Gabrielli@arm.com * Fall through here for pass through to host devices, such 91810850SGiacomo.Gabrielli@arm.com * as /dev/zero 91910850SGiacomo.Gabrielli@arm.com */ 92010850SGiacomo.Gabrielli@arm.com } 92110850SGiacomo.Gabrielli@arm.com 9226640Svince@csl.cornell.edu /** 9236640Svince@csl.cornell.edu * We make several attempts resolve a call to open. 9246640Svince@csl.cornell.edu * 92511851Sbrandon.potter@amd.com * 1) Resolve any path redirection before hand. This will set the path 92611851Sbrandon.potter@amd.com * up with variable 'redir_path' which may contain a modified path or 9276640Svince@csl.cornell.edu * the original path value. This should already be done in prior code. 9286640Svince@csl.cornell.edu * 2) Try to handle the access using 'special_paths'. Some special_paths 9296701Sgblack@eecs.umich.edu * and files cannot be called on the host and need to be handled as 9306701Sgblack@eecs.umich.edu * special cases inside the simulator. These special_paths are handled by 93110793Sbrandon.potter@amd.com * C++ routines to provide output back to userspace. 9326640Svince@csl.cornell.edu * 3) If the full path that was created above does not match any of the 93311758Sbrandon.potter@amd.com * special cases, pass it through to the open call on the __HOST__ to let 93411758Sbrandon.potter@amd.com * the host open the file on our behalf. Again, the openImpl tries to 93511758Sbrandon.potter@amd.com * USE_THE_HOST_FILESYSTEM_OPEN (with a possible redirection to the 9366640Svince@csl.cornell.edu * faux-filesystem files). The faux-filesystem is dynamically created 9378706Sandreas.hansson@arm.com * during simulator configuration using Python functions. 9386640Svince@csl.cornell.edu * 4) If the host cannot open the file, the open attempt failed in "3)". 9396701Sgblack@eecs.umich.edu * Return the host's error code back through the system call to the 9406640Svince@csl.cornell.edu * simulated process. If running a debug trace, also notify the user that 941360SN/A * the open call failed. 9421999SN/A * 9431999SN/A * Any success will set sim_fd to something other than -1 and skip the 9441999SN/A * next conditions effectively bypassing them. 94511851Sbrandon.potter@amd.com */ 9462680Sktlim@umich.edu int sim_fd = -1; 9471999SN/A std::string used_path; 9481999SN/A std::vector<std::string> special_paths = 9491999SN/A { "/proc/meminfo/", "/system/", "/sys/", "/platform/", 9506701Sgblack@eecs.umich.edu "/etc/passwd" }; 9518852Sandreas.hansson@arm.com for (auto entry : special_paths) { 9526701Sgblack@eecs.umich.edu if (startswith(path, entry)) { 9531999SN/A sim_fd = OS::openSpecialFile(abs_path, p, tc); 9546701Sgblack@eecs.umich.edu used_path = abs_path; 9551999SN/A } 9566701Sgblack@eecs.umich.edu } 9571999SN/A if (sim_fd == -1) { 9581999SN/A sim_fd = open(redir_path.c_str(), host_flags, mode); 9591999SN/A used_path = redir_path; 9601999SN/A } 9611999SN/A if (sim_fd == -1) { 9623669Sbinkertn@umich.edu int local = -errno; 9633669Sbinkertn@umich.edu DPRINTF_SYSCALL(Verbose, "open%s: failed -> path:%s " 9643669Sbinkertn@umich.edu "(inferred from:%s)\n", isopenat ? "at" : "", 9651999SN/A used_path.c_str(), path.c_str()); 9661999SN/A return local; 9671999SN/A } 9682218SN/A 9691999SN/A /** 9701999SN/A * The file was opened successfully and needs to be recorded in the 9711999SN/A * process' file descriptor array so that it can be retrieved later. 9721999SN/A * The target file descriptor that is chosen will be the lowest unused 97313570Sbrandon.potter@amd.com * file descriptor. 97413570Sbrandon.potter@amd.com * Return the indirect target file descriptor back to the simulated 97513570Sbrandon.potter@amd.com * process to act as a handle for the opened file. 97613570Sbrandon.potter@amd.com */ 97713570Sbrandon.potter@amd.com auto ffdp = std::make_shared<FileFDEntry>(sim_fd, host_flags, path, 0); 97813570Sbrandon.potter@amd.com int tgt_fd = p->fds->allocFD(ffdp); 97913570Sbrandon.potter@amd.com DPRINTF_SYSCALL(Verbose, "open%s: sim_fd[%d], target_fd[%d] -> path:%s\n" 98013570Sbrandon.potter@amd.com "(inferred from:%s)\n", isopenat ? "at" : "", 98113570Sbrandon.potter@amd.com sim_fd, tgt_fd, used_path.c_str(), path.c_str()); 98213570Sbrandon.potter@amd.com return tgt_fd; 98313570Sbrandon.potter@amd.com} 98413570Sbrandon.potter@amd.com 98513570Sbrandon.potter@amd.com/// Target open() handler. 98613570Sbrandon.potter@amd.comtemplate <class OS> 98713570Sbrandon.potter@amd.comSyscallReturn 98813570Sbrandon.potter@amd.comopenFunc(SyscallDesc *desc, int callnum, Process *process, 98913570Sbrandon.potter@amd.com ThreadContext *tc) 99013570Sbrandon.potter@amd.com{ 99113570Sbrandon.potter@amd.com return openImpl<OS>(desc, callnum, process, tc, false); 99213570Sbrandon.potter@amd.com} 99313570Sbrandon.potter@amd.com 99413570Sbrandon.potter@amd.com/// Target openat() handler. 99513570Sbrandon.potter@amd.comtemplate <class OS> 99613570Sbrandon.potter@amd.comSyscallReturn 99713570Sbrandon.potter@amd.comopenatFunc(SyscallDesc *desc, int callnum, Process *process, 99813570Sbrandon.potter@amd.com ThreadContext *tc) 99913570Sbrandon.potter@amd.com{ 100013570Sbrandon.potter@amd.com return openImpl<OS>(desc, callnum, process, tc, true); 100113570Sbrandon.potter@amd.com} 100213570Sbrandon.potter@amd.com 100313570Sbrandon.potter@amd.com/// Target unlinkat() handler. 100413570Sbrandon.potter@amd.comtemplate <class OS> 100513570Sbrandon.potter@amd.comSyscallReturn 100613570Sbrandon.potter@amd.comunlinkatFunc(SyscallDesc *desc, int callnum, Process *process, 100713570Sbrandon.potter@amd.com ThreadContext *tc) 100813570Sbrandon.potter@amd.com{ 100913570Sbrandon.potter@amd.com int index = 0; 101013570Sbrandon.potter@amd.com int dirfd = process->getSyscallArg(tc, index); 101113570Sbrandon.potter@amd.com if (dirfd != OS::TGT_AT_FDCWD) 101213570Sbrandon.potter@amd.com warn("unlinkat: first argument not AT_FDCWD; unlikely to work"); 101313570Sbrandon.potter@amd.com 101413570Sbrandon.potter@amd.com return unlinkHelper(desc, callnum, process, tc, 1); 101513570Sbrandon.potter@amd.com} 101613570Sbrandon.potter@amd.com 101713570Sbrandon.potter@amd.com/// Target facessat() handler 101813570Sbrandon.potter@amd.comtemplate <class OS> 101913570Sbrandon.potter@amd.comSyscallReturn 102013570Sbrandon.potter@amd.comfaccessatFunc(SyscallDesc *desc, int callnum, Process *process, 102113570Sbrandon.potter@amd.com ThreadContext *tc) 102213570Sbrandon.potter@amd.com{ 102313570Sbrandon.potter@amd.com int index = 0; 102413570Sbrandon.potter@amd.com int dirfd = process->getSyscallArg(tc, index); 102513570Sbrandon.potter@amd.com if (dirfd != OS::TGT_AT_FDCWD) 102613570Sbrandon.potter@amd.com warn("faccessat: first argument not AT_FDCWD; unlikely to work"); 102713570Sbrandon.potter@amd.com return accessFunc(desc, callnum, process, tc, 1); 102813570Sbrandon.potter@amd.com} 102913570Sbrandon.potter@amd.com 103013570Sbrandon.potter@amd.com/// Target readlinkat() handler 103113570Sbrandon.potter@amd.comtemplate <class OS> 103213570Sbrandon.potter@amd.comSyscallReturn 103313570Sbrandon.potter@amd.comreadlinkatFunc(SyscallDesc *desc, int callnum, Process *process, 103413570Sbrandon.potter@amd.com ThreadContext *tc) 103513570Sbrandon.potter@amd.com{ 103613570Sbrandon.potter@amd.com int index = 0; 103713570Sbrandon.potter@amd.com int dirfd = process->getSyscallArg(tc, index); 103813570Sbrandon.potter@amd.com if (dirfd != OS::TGT_AT_FDCWD) 103913570Sbrandon.potter@amd.com warn("openat: first argument not AT_FDCWD; unlikely to work"); 104013570Sbrandon.potter@amd.com return readlinkFunc(desc, callnum, process, tc, 1); 104113570Sbrandon.potter@amd.com} 104213570Sbrandon.potter@amd.com 104313570Sbrandon.potter@amd.com/// Target renameat() handler. 104413570Sbrandon.potter@amd.comtemplate <class OS> 104513570Sbrandon.potter@amd.comSyscallReturn 104613570Sbrandon.potter@amd.comrenameatFunc(SyscallDesc *desc, int callnum, Process *process, 10471999SN/A ThreadContext *tc) 10481999SN/A{ 10491999SN/A int index = 0; 10501999SN/A 105111856Sbrandon.potter@amd.com int olddirfd = process->getSyscallArg(tc, index); 10521999SN/A if (olddirfd != OS::TGT_AT_FDCWD) 10536701Sgblack@eecs.umich.edu warn("renameat: first argument not AT_FDCWD; unlikely to work"); 105411856Sbrandon.potter@amd.com 105511856Sbrandon.potter@amd.com std::string old_name; 105610931Sbrandon.potter@amd.com 105711856Sbrandon.potter@amd.com if (!tc->getMemProxy().tryReadString(old_name, 105811856Sbrandon.potter@amd.com process->getSyscallArg(tc, index))) 10591999SN/A return -EFAULT; 106011856Sbrandon.potter@amd.com 10611999SN/A int newdirfd = process->getSyscallArg(tc, index); 106211856Sbrandon.potter@amd.com if (newdirfd != OS::TGT_AT_FDCWD) 10631999SN/A warn("renameat: third argument not AT_FDCWD; unlikely to work"); 106411856Sbrandon.potter@amd.com 10651999SN/A std::string new_name; 106611856Sbrandon.potter@amd.com 10671999SN/A if (!tc->getMemProxy().tryReadString(new_name, 10681999SN/A process->getSyscallArg(tc, index))) 10695877Shsul@eecs.umich.edu return -EFAULT; 10705877Shsul@eecs.umich.edu 10715877Shsul@eecs.umich.edu // Adjust path for cwd and redirection 107211851Sbrandon.potter@amd.com old_name = process->checkPathRedirect(old_name); 10735877Shsul@eecs.umich.edu new_name = process->checkPathRedirect(new_name); 10746701Sgblack@eecs.umich.edu 10756701Sgblack@eecs.umich.edu int result = rename(old_name.c_str(), new_name.c_str()); 10766701Sgblack@eecs.umich.edu return (result == -1) ? -errno : result; 10776701Sgblack@eecs.umich.edu} 10786701Sgblack@eecs.umich.edu 107910027SChris.Adeniyi-Jones@arm.com/// Target sysinfo() handler. 108010027SChris.Adeniyi-Jones@arm.comtemplate <class OS> 108110027SChris.Adeniyi-Jones@arm.comSyscallReturn 108210027SChris.Adeniyi-Jones@arm.comsysinfoFunc(SyscallDesc *desc, int callnum, Process *process, 108310027SChris.Adeniyi-Jones@arm.com ThreadContext *tc) 10845877Shsul@eecs.umich.edu{ 108510318Sandreas.hansson@arm.com 108610318Sandreas.hansson@arm.com int index = 0; 10875877Shsul@eecs.umich.edu TypedBufferArg<typename OS::tgt_sysinfo> 10885877Shsul@eecs.umich.edu sysinfo(process->getSyscallArg(tc, index)); 10895877Shsul@eecs.umich.edu 10905877Shsul@eecs.umich.edu sysinfo->uptime = seconds_since_epoch; 109110486Stjablin@gmail.com sysinfo->totalram = process->system->memSize(); 109210486Stjablin@gmail.com sysinfo->mem_unit = 1; 10935877Shsul@eecs.umich.edu 109411905SBrandon.Potter@amd.com sysinfo.copyOut(tc->getMemProxy()); 109511905SBrandon.Potter@amd.com 109611905SBrandon.Potter@amd.com return 0; 109711905SBrandon.Potter@amd.com} 109810027SChris.Adeniyi-Jones@arm.com 109912206Srico.amslinger@informatik.uni-augsburg.de/// Target chmod() handler. 110012206Srico.amslinger@informatik.uni-augsburg.detemplate <class OS> 11015877Shsul@eecs.umich.eduSyscallReturn 110211905SBrandon.Potter@amd.comchmodFunc(SyscallDesc *desc, int callnum, Process *process, 110311905SBrandon.Potter@amd.com ThreadContext *tc) 11045877Shsul@eecs.umich.edu{ 11055877Shsul@eecs.umich.edu std::string path; 110610027SChris.Adeniyi-Jones@arm.com 11075877Shsul@eecs.umich.edu int index = 0; 11085877Shsul@eecs.umich.edu if (!tc->getMemProxy().tryReadString(path, 11095877Shsul@eecs.umich.edu process->getSyscallArg(tc, index))) { 111012206Srico.amslinger@informatik.uni-augsburg.de return -EFAULT; 111112206Srico.amslinger@informatik.uni-augsburg.de } 111212206Srico.amslinger@informatik.uni-augsburg.de 111312206Srico.amslinger@informatik.uni-augsburg.de uint32_t mode = process->getSyscallArg(tc, index); 111412206Srico.amslinger@informatik.uni-augsburg.de mode_t hostMode = 0; 111512206Srico.amslinger@informatik.uni-augsburg.de 111612206Srico.amslinger@informatik.uni-augsburg.de // XXX translate mode flags via OS::something??? 111712206Srico.amslinger@informatik.uni-augsburg.de hostMode = mode; 111812206Srico.amslinger@informatik.uni-augsburg.de 111910027SChris.Adeniyi-Jones@arm.com // Adjust path for cwd and redirection 112010027SChris.Adeniyi-Jones@arm.com path = process->checkPathRedirect(path); 112110027SChris.Adeniyi-Jones@arm.com 112210027SChris.Adeniyi-Jones@arm.com // do the chmod 11235877Shsul@eecs.umich.edu int result = chmod(path.c_str(), hostMode); 112410027SChris.Adeniyi-Jones@arm.com if (result < 0) 112510027SChris.Adeniyi-Jones@arm.com return -errno; 112610027SChris.Adeniyi-Jones@arm.com 112710027SChris.Adeniyi-Jones@arm.com return 0; 112812206Srico.amslinger@informatik.uni-augsburg.de} 112912206Srico.amslinger@informatik.uni-augsburg.de 113012206Srico.amslinger@informatik.uni-augsburg.detemplate <class OS> 113112206Srico.amslinger@informatik.uni-augsburg.deSyscallReturn 113210027SChris.Adeniyi-Jones@arm.compollFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 113310027SChris.Adeniyi-Jones@arm.com{ 113410027SChris.Adeniyi-Jones@arm.com int index = 0; 113510027SChris.Adeniyi-Jones@arm.com Addr fdsPtr = p->getSyscallArg(tc, index); 113610027SChris.Adeniyi-Jones@arm.com int nfds = p->getSyscallArg(tc, index); 113710027SChris.Adeniyi-Jones@arm.com int tmout = p->getSyscallArg(tc, index); 11385877Shsul@eecs.umich.edu 11395877Shsul@eecs.umich.edu BufferArg fdsBuf(fdsPtr, sizeof(struct pollfd) * nfds); 11405877Shsul@eecs.umich.edu fdsBuf.copyIn(tc->getMemProxy()); 114110027SChris.Adeniyi-Jones@arm.com 114210027SChris.Adeniyi-Jones@arm.com /** 11438601Ssteve.reinhardt@amd.com * Record the target file descriptors in a local variable. We need to 114410027SChris.Adeniyi-Jones@arm.com * replace them with host file descriptors but we need a temporary copy 11455877Shsul@eecs.umich.edu * for later. Afterwards, replace each target file descriptor in the 11465877Shsul@eecs.umich.edu * poll_fd array with its host_fd. 11471999SN/A */ 1148378SN/A int temp_tgt_fds[nfds]; 1149360SN/A for (index = 0; index < nfds; index++) { 11501450SN/A temp_tgt_fds[index] = ((struct pollfd *)fdsBuf.bufferPtr())[index].fd; 115111851Sbrandon.potter@amd.com auto tgt_fd = temp_tgt_fds[index]; 11522680Sktlim@umich.edu auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 1153360SN/A if (!hbfdp) 1154360SN/A return -EBADF; 1155360SN/A auto host_fd = hbfdp->getSimFD(); 11566701Sgblack@eecs.umich.edu ((struct pollfd *)fdsBuf.bufferPtr())[index].fd = host_fd; 11578852Sandreas.hansson@arm.com } 11586701Sgblack@eecs.umich.edu 11596701Sgblack@eecs.umich.edu /** 11606701Sgblack@eecs.umich.edu * We cannot allow an infinite poll to occur or it will inevitably cause 11616701Sgblack@eecs.umich.edu * a deadlock in the gem5 simulator with clone. We must pass in tmout with 1162360SN/A * a non-negative value, however it also makes no sense to poll on the 11633669Sbinkertn@umich.edu * underlying host for any other time than tmout a zero timeout. 11643669Sbinkertn@umich.edu */ 11653669Sbinkertn@umich.edu int status; 1166360SN/A if (tmout < 0) { 1167360SN/A status = poll((struct pollfd *)fdsBuf.bufferPtr(), nfds, 0); 1168360SN/A if (status == 0) { 1169360SN/A /** 11702218SN/A * If blocking indefinitely, check the signal list to see if a 1171360SN/A * signal would break the poll out of the retry cycle and try 11728706Sandreas.hansson@arm.com * to return the signal interrupt instead. 1173360SN/A */ 11741458SN/A System *sysh = tc->getSystemPtr(); 1175360SN/A std::list<BasicSignal>::iterator it; 1176360SN/A for (it=sysh->signalList.begin(); it!=sysh->signalList.end(); it++) 1177360SN/A if (it->receiver == p) 11785074Ssaidi@eecs.umich.edu return -EINTR; 11795074Ssaidi@eecs.umich.edu return SyscallReturn::retry(); 11805074Ssaidi@eecs.umich.edu } 118111851Sbrandon.potter@amd.com } else 11825074Ssaidi@eecs.umich.edu status = poll((struct pollfd *)fdsBuf.bufferPtr(), nfds, 0); 11835074Ssaidi@eecs.umich.edu 11845074Ssaidi@eecs.umich.edu if (status == -1) 11855074Ssaidi@eecs.umich.edu return -errno; 11866701Sgblack@eecs.umich.edu 11878852Sandreas.hansson@arm.com /** 11886701Sgblack@eecs.umich.edu * Replace each host_fd in the returned poll_fd array with its original 11895074Ssaidi@eecs.umich.edu * target file descriptor. 11906701Sgblack@eecs.umich.edu */ 11915074Ssaidi@eecs.umich.edu for (index = 0; index < nfds; index++) { 11925074Ssaidi@eecs.umich.edu auto tgt_fd = temp_tgt_fds[index]; 11935074Ssaidi@eecs.umich.edu ((struct pollfd *)fdsBuf.bufferPtr())[index].fd = tgt_fd; 11945074Ssaidi@eecs.umich.edu } 11955208Ssaidi@eecs.umich.edu 11965208Ssaidi@eecs.umich.edu /** 11975208Ssaidi@eecs.umich.edu * Copy out the pollfd struct because the host may have updated fields 11985208Ssaidi@eecs.umich.edu * in the structure. 11995074Ssaidi@eecs.umich.edu */ 12005074Ssaidi@eecs.umich.edu fdsBuf.copyOut(tc->getMemProxy()); 12015208Ssaidi@eecs.umich.edu 12025074Ssaidi@eecs.umich.edu return status; 12035074Ssaidi@eecs.umich.edu} 12045074Ssaidi@eecs.umich.edu 12055074Ssaidi@eecs.umich.edu/// Target fchmod() handler. 12068706Sandreas.hansson@arm.comtemplate <class OS> 12075074Ssaidi@eecs.umich.eduSyscallReturn 12085074Ssaidi@eecs.umich.edufchmodFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 12095074Ssaidi@eecs.umich.edu{ 12105074Ssaidi@eecs.umich.edu int index = 0; 12115074Ssaidi@eecs.umich.edu int tgt_fd = p->getSyscallArg(tc, index); 121210027SChris.Adeniyi-Jones@arm.com uint32_t mode = p->getSyscallArg(tc, index); 121310027SChris.Adeniyi-Jones@arm.com 121410027SChris.Adeniyi-Jones@arm.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 121511851Sbrandon.potter@amd.com if (!ffdp) 121610027SChris.Adeniyi-Jones@arm.com return -EBADF; 121710027SChris.Adeniyi-Jones@arm.com int sim_fd = ffdp->getSimFD(); 121810027SChris.Adeniyi-Jones@arm.com 121910027SChris.Adeniyi-Jones@arm.com mode_t hostMode = mode; 122010027SChris.Adeniyi-Jones@arm.com 122110793Sbrandon.potter@amd.com int result = fchmod(sim_fd, hostMode); 122210027SChris.Adeniyi-Jones@arm.com 122310027SChris.Adeniyi-Jones@arm.com return (result < 0) ? -errno : 0; 122410027SChris.Adeniyi-Jones@arm.com} 122510027SChris.Adeniyi-Jones@arm.com 122610027SChris.Adeniyi-Jones@arm.com/// Target mremap() handler. 122710027SChris.Adeniyi-Jones@arm.comtemplate <class OS> 122810027SChris.Adeniyi-Jones@arm.comSyscallReturn 122910027SChris.Adeniyi-Jones@arm.commremapFunc(SyscallDesc *desc, int callnum, Process *process, ThreadContext *tc) 123010027SChris.Adeniyi-Jones@arm.com{ 123110027SChris.Adeniyi-Jones@arm.com int index = 0; 123210027SChris.Adeniyi-Jones@arm.com Addr start = process->getSyscallArg(tc, index); 123310027SChris.Adeniyi-Jones@arm.com uint64_t old_length = process->getSyscallArg(tc, index); 123410027SChris.Adeniyi-Jones@arm.com uint64_t new_length = process->getSyscallArg(tc, index); 123510027SChris.Adeniyi-Jones@arm.com uint64_t flags = process->getSyscallArg(tc, index); 123610027SChris.Adeniyi-Jones@arm.com uint64_t provided_address = 0; 123710027SChris.Adeniyi-Jones@arm.com bool use_provided_address = flags & OS::TGT_MREMAP_FIXED; 123810027SChris.Adeniyi-Jones@arm.com 123910027SChris.Adeniyi-Jones@arm.com if (use_provided_address) 124010027SChris.Adeniyi-Jones@arm.com provided_address = process->getSyscallArg(tc, index); 124110027SChris.Adeniyi-Jones@arm.com 124210027SChris.Adeniyi-Jones@arm.com if ((start % TheISA::PageBytes != 0) || 124310027SChris.Adeniyi-Jones@arm.com (provided_address % TheISA::PageBytes != 0)) { 124410027SChris.Adeniyi-Jones@arm.com warn("mremap failing: arguments not page aligned"); 124510027SChris.Adeniyi-Jones@arm.com return -EINVAL; 124610027SChris.Adeniyi-Jones@arm.com } 124710027SChris.Adeniyi-Jones@arm.com 124810027SChris.Adeniyi-Jones@arm.com new_length = roundUp(new_length, TheISA::PageBytes); 12491999SN/A 12501999SN/A if (new_length > old_length) { 12511999SN/A std::shared_ptr<MemState> mem_state = process->memState; 125211856Sbrandon.potter@amd.com Addr mmap_end = mem_state->getMmapEnd(); 12531999SN/A 12546701Sgblack@eecs.umich.edu if ((start + old_length) == mmap_end && 125511856Sbrandon.potter@amd.com (!use_provided_address || provided_address == start)) { 125611856Sbrandon.potter@amd.com // This case cannot occur when growing downward, as 125710931Sbrandon.potter@amd.com // start is greater than or equal to mmap_end. 125811856Sbrandon.potter@amd.com uint64_t diff = new_length - old_length; 125911856Sbrandon.potter@amd.com process->allocateMem(mmap_end, diff); 12601999SN/A mem_state->setMmapEnd(mmap_end + diff); 126111856Sbrandon.potter@amd.com return start; 12621999SN/A } else { 12632764Sstever@eecs.umich.edu if (!use_provided_address && !(flags & OS::TGT_MREMAP_MAYMOVE)) { 12642064SN/A warn("can't remap here and MREMAP_MAYMOVE flag not set\n"); 126510931Sbrandon.potter@amd.com return -ENOMEM; 12662064SN/A } else { 12672064SN/A uint64_t new_start = provided_address; 126810931Sbrandon.potter@amd.com if (!use_provided_address) { 12692064SN/A new_start = process->mmapGrowsDown() ? 12701999SN/A mmap_end - new_length : mmap_end; 12711999SN/A mmap_end = process->mmapGrowsDown() ? 12722218SN/A new_start : mmap_end + new_length; 12731999SN/A mem_state->setMmapEnd(mmap_end); 127410931Sbrandon.potter@amd.com } 12751999SN/A 12761999SN/A process->pTable->remap(start, old_length, new_start); 12771999SN/A warn("mremapping to new vaddr %08p-%08p, adding %d\n", 12781999SN/A new_start, new_start + new_length, 12791999SN/A new_length - old_length); 1280378SN/A // add on the remaining unallocated pages 1281360SN/A process->allocateMem(new_start + old_length, 12821450SN/A new_length - old_length, 128311851Sbrandon.potter@amd.com use_provided_address /* clobber */); 12842680Sktlim@umich.edu if (use_provided_address && 1285360SN/A ((new_start + new_length > mem_state->getMmapEnd() && 1286360SN/A !process->mmapGrowsDown()) || 1287360SN/A (new_start < mem_state->getMmapEnd() && 12886701Sgblack@eecs.umich.edu process->mmapGrowsDown()))) { 12898852Sandreas.hansson@arm.com // something fishy going on here, at least notify the user 12906701Sgblack@eecs.umich.edu // @todo: increase mmap_end? 12916701Sgblack@eecs.umich.edu warn("mmap region limit exceeded with MREMAP_FIXED\n"); 12926701Sgblack@eecs.umich.edu } 12936701Sgblack@eecs.umich.edu warn("returning %08p as start\n", new_start); 1294360SN/A return new_start; 12953669Sbinkertn@umich.edu } 12963669Sbinkertn@umich.edu } 12973669Sbinkertn@umich.edu } else { 1298360SN/A if (use_provided_address && provided_address != start) 1299360SN/A process->pTable->remap(start, new_length, provided_address); 1300360SN/A process->pTable->unmap(start + new_length, old_length - new_length); 1301360SN/A return use_provided_address ? provided_address : start; 13021458SN/A } 1303360SN/A} 13048706Sandreas.hansson@arm.com 1305360SN/A/// Target stat() handler. 13061458SN/Atemplate <class OS> 1307360SN/ASyscallReturn 1308360SN/AstatFunc(SyscallDesc *desc, int callnum, Process *process, 13091999SN/A ThreadContext *tc) 13101999SN/A{ 13111999SN/A std::string path; 131211851Sbrandon.potter@amd.com 13132680Sktlim@umich.edu int index = 0; 13141999SN/A if (!tc->getMemProxy().tryReadString(path, 13151999SN/A process->getSyscallArg(tc, index))) { 13161999SN/A return -EFAULT; 13176701Sgblack@eecs.umich.edu } 13188852Sandreas.hansson@arm.com Addr bufPtr = process->getSyscallArg(tc, index); 13196701Sgblack@eecs.umich.edu 13206701Sgblack@eecs.umich.edu // Adjust path for cwd and redirection 13216701Sgblack@eecs.umich.edu path = process->checkPathRedirect(path); 13226701Sgblack@eecs.umich.edu 13231999SN/A struct stat hostBuf; 13243669Sbinkertn@umich.edu int result = stat(path.c_str(), &hostBuf); 13253669Sbinkertn@umich.edu 13263669Sbinkertn@umich.edu if (result < 0) 13272764Sstever@eecs.umich.edu return -errno; 13282064SN/A 13292064SN/A copyOutStatBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 13302064SN/A 13311999SN/A return 0; 13321999SN/A} 13332064SN/A 13341999SN/A 13351999SN/A/// Target stat64() handler. 13361999SN/Atemplate <class OS> 13371999SN/ASyscallReturn 13388706Sandreas.hansson@arm.comstat64Func(SyscallDesc *desc, int callnum, Process *process, 13391999SN/A ThreadContext *tc) 13401999SN/A{ 13411999SN/A std::string path; 13421999SN/A 1343378SN/A int index = 0; 1344360SN/A if (!tc->getMemProxy().tryReadString(path, 13451450SN/A process->getSyscallArg(tc, index))) 134611856Sbrandon.potter@amd.com return -EFAULT; 1347360SN/A Addr bufPtr = process->getSyscallArg(tc, index); 13486701Sgblack@eecs.umich.edu 134911856Sbrandon.potter@amd.com // Adjust path for cwd and redirection 135011856Sbrandon.potter@amd.com path = process->checkPathRedirect(path); 1351360SN/A 135211380Salexandru.dutu@amd.com#if NO_STAT64 1353360SN/A struct stat hostBuf; 135411856Sbrandon.potter@amd.com int result = stat(path.c_str(), &hostBuf); 135511856Sbrandon.potter@amd.com#else 13561458SN/A struct stat64 hostBuf; 135711856Sbrandon.potter@amd.com int result = stat64(path.c_str(), &hostBuf); 1358360SN/A#endif 1359360SN/A 136010931Sbrandon.potter@amd.com if (result < 0) 1361360SN/A return -errno; 1362360SN/A 13631458SN/A copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 1364360SN/A 136510931Sbrandon.potter@amd.com return 0; 13662021SN/A} 13671458SN/A 1368360SN/A 1369360SN/A/// Target fstatat64() handler. 13701706SN/Atemplate <class OS> 13711706SN/ASyscallReturn 13721706SN/Afstatat64Func(SyscallDesc *desc, int callnum, Process *process, 137311851Sbrandon.potter@amd.com ThreadContext *tc) 13742680Sktlim@umich.edu{ 13751706SN/A int index = 0; 137611799Sbrandon.potter@amd.com int dirfd = process->getSyscallArg(tc, index); 137711799Sbrandon.potter@amd.com if (dirfd != OS::TGT_AT_FDCWD) 137811799Sbrandon.potter@amd.com warn("fstatat64: first argument not AT_FDCWD; unlikely to work"); 13791706SN/A 13801706SN/A std::string path; 13816701Sgblack@eecs.umich.edu if (!tc->getMemProxy().tryReadString(path, 13828852Sandreas.hansson@arm.com process->getSyscallArg(tc, index))) 13836701Sgblack@eecs.umich.edu return -EFAULT; 13846701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 13856701Sgblack@eecs.umich.edu 13866701Sgblack@eecs.umich.edu // Adjust path for cwd and redirection 13871706SN/A path = process->checkPathRedirect(path); 13883669Sbinkertn@umich.edu 13893669Sbinkertn@umich.edu#if NO_STAT64 13903669Sbinkertn@umich.edu struct stat hostBuf; 13911706SN/A int result = stat(path.c_str(), &hostBuf); 13921706SN/A#else 13931706SN/A struct stat64 hostBuf; 13941706SN/A int result = stat64(path.c_str(), &hostBuf); 13952218SN/A#endif 13961706SN/A 139711759Sbrandon.potter@amd.com if (result < 0) 139811799Sbrandon.potter@amd.com return -errno; 13991706SN/A 14001706SN/A copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 14011706SN/A 140211886Sbrandon.potter@amd.com return 0; 140311886Sbrandon.potter@amd.com} 140411886Sbrandon.potter@amd.com 140511886Sbrandon.potter@amd.com 140611886Sbrandon.potter@amd.com/// Target fstat64() handler. 140712426Sqtt2@cornell.edutemplate <class OS> 140813557Sgabeblack@google.comSyscallReturn 140913557Sgabeblack@google.comfstat64Func(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 141011886Sbrandon.potter@amd.com{ 141112426Sqtt2@cornell.edu int index = 0; 141213534Sandreas.sandberg@arm.com int tgt_fd = p->getSyscallArg(tc, index); 141312426Sqtt2@cornell.edu Addr bufPtr = p->getSyscallArg(tc, index); 141413534Sandreas.sandberg@arm.com 141512426Sqtt2@cornell.edu auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 141612426Sqtt2@cornell.edu if (!ffdp) 141712426Sqtt2@cornell.edu return -EBADF; 141813536Sandreas.sandberg@arm.com int sim_fd = ffdp->getSimFD(); 141912426Sqtt2@cornell.edu 142012426Sqtt2@cornell.edu#if NO_STAT64 142111886Sbrandon.potter@amd.com struct stat hostBuf; 142213536Sandreas.sandberg@arm.com int result = fstat(sim_fd, &hostBuf); 142312426Sqtt2@cornell.edu#else 142411886Sbrandon.potter@amd.com struct stat64 hostBuf; 142511886Sbrandon.potter@amd.com int result = fstat64(sim_fd, &hostBuf); 142611886Sbrandon.potter@amd.com#endif 142711886Sbrandon.potter@amd.com 142811886Sbrandon.potter@amd.com if (result < 0) 142911886Sbrandon.potter@amd.com return -errno; 143011886Sbrandon.potter@amd.com 143111886Sbrandon.potter@amd.com copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf, (sim_fd == 1)); 143211886Sbrandon.potter@amd.com 143311886Sbrandon.potter@amd.com return 0; 143413649Sqtt2@cornell.edu} 143513649Sqtt2@cornell.edu 143613649Sqtt2@cornell.edu 143713649Sqtt2@cornell.edu/// Target lstat() handler. 143813649Sqtt2@cornell.edutemplate <class OS> 143911886Sbrandon.potter@amd.comSyscallReturn 144011886Sbrandon.potter@amd.comlstatFunc(SyscallDesc *desc, int callnum, Process *process, 144111886Sbrandon.potter@amd.com ThreadContext *tc) 144211886Sbrandon.potter@amd.com{ 144311886Sbrandon.potter@amd.com std::string path; 144411886Sbrandon.potter@amd.com 144511886Sbrandon.potter@amd.com int index = 0; 144611886Sbrandon.potter@amd.com if (!tc->getMemProxy().tryReadString(path, 144711886Sbrandon.potter@amd.com process->getSyscallArg(tc, index))) { 144811886Sbrandon.potter@amd.com return -EFAULT; 144911886Sbrandon.potter@amd.com } 145011886Sbrandon.potter@amd.com Addr bufPtr = process->getSyscallArg(tc, index); 145111886Sbrandon.potter@amd.com 145211886Sbrandon.potter@amd.com // Adjust path for cwd and redirection 145311886Sbrandon.potter@amd.com path = process->checkPathRedirect(path); 145411886Sbrandon.potter@amd.com 145511886Sbrandon.potter@amd.com struct stat hostBuf; 145611886Sbrandon.potter@amd.com int result = lstat(path.c_str(), &hostBuf); 145711886Sbrandon.potter@amd.com 145811886Sbrandon.potter@amd.com if (result < 0) 145911886Sbrandon.potter@amd.com return -errno; 146011886Sbrandon.potter@amd.com 146111886Sbrandon.potter@amd.com copyOutStatBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 146211886Sbrandon.potter@amd.com 146311886Sbrandon.potter@amd.com return 0; 146411886Sbrandon.potter@amd.com} 146511886Sbrandon.potter@amd.com 146611886Sbrandon.potter@amd.com/// Target lstat64() handler. 146711886Sbrandon.potter@amd.comtemplate <class OS> 146811886Sbrandon.potter@amd.comSyscallReturn 146911886Sbrandon.potter@amd.comlstat64Func(SyscallDesc *desc, int callnum, Process *process, 147011886Sbrandon.potter@amd.com ThreadContext *tc) 147111886Sbrandon.potter@amd.com{ 147211886Sbrandon.potter@amd.com std::string path; 147311886Sbrandon.potter@amd.com 147411886Sbrandon.potter@amd.com int index = 0; 147511886Sbrandon.potter@amd.com if (!tc->getMemProxy().tryReadString(path, 147611886Sbrandon.potter@amd.com process->getSyscallArg(tc, index))) { 147711886Sbrandon.potter@amd.com return -EFAULT; 147811886Sbrandon.potter@amd.com } 147911886Sbrandon.potter@amd.com Addr bufPtr = process->getSyscallArg(tc, index); 148011886Sbrandon.potter@amd.com 148111886Sbrandon.potter@amd.com // Adjust path for cwd and redirection 148211886Sbrandon.potter@amd.com path = process->checkPathRedirect(path); 148311886Sbrandon.potter@amd.com 148411886Sbrandon.potter@amd.com#if NO_STAT64 148511886Sbrandon.potter@amd.com struct stat hostBuf; 148611886Sbrandon.potter@amd.com int result = lstat(path.c_str(), &hostBuf); 148711886Sbrandon.potter@amd.com#else 148811911SBrandon.Potter@amd.com struct stat64 hostBuf; 148911911SBrandon.Potter@amd.com int result = lstat64(path.c_str(), &hostBuf); 149011911SBrandon.Potter@amd.com#endif 149111911SBrandon.Potter@amd.com 149211911SBrandon.Potter@amd.com if (result < 0) 149311911SBrandon.Potter@amd.com return -errno; 149411911SBrandon.Potter@amd.com 149511886Sbrandon.potter@amd.com copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 149611886Sbrandon.potter@amd.com 149711886Sbrandon.potter@amd.com return 0; 149811886Sbrandon.potter@amd.com} 149911886Sbrandon.potter@amd.com 150011886Sbrandon.potter@amd.com/// Target fstat() handler. 150111886Sbrandon.potter@amd.comtemplate <class OS> 150211886Sbrandon.potter@amd.comSyscallReturn 150311886Sbrandon.potter@amd.comfstatFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 150411886Sbrandon.potter@amd.com{ 150511886Sbrandon.potter@amd.com int index = 0; 150611886Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 150713536Sandreas.sandberg@arm.com Addr bufPtr = p->getSyscallArg(tc, index); 150811886Sbrandon.potter@amd.com 150911886Sbrandon.potter@amd.com DPRINTF_SYSCALL(Verbose, "fstat(%d, ...)\n", tgt_fd); 151011886Sbrandon.potter@amd.com 151111886Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 151211886Sbrandon.potter@amd.com if (!ffdp) 151311886Sbrandon.potter@amd.com return -EBADF; 151411886Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 151511886Sbrandon.potter@amd.com 151611886Sbrandon.potter@amd.com struct stat hostBuf; 151711886Sbrandon.potter@amd.com int result = fstat(sim_fd, &hostBuf); 151813535Sandreas.sandberg@arm.com 151913535Sandreas.sandberg@arm.com if (result < 0) 152013535Sandreas.sandberg@arm.com return -errno; 152111886Sbrandon.potter@amd.com 152211886Sbrandon.potter@amd.com copyOutStatBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf, (sim_fd == 1)); 152311886Sbrandon.potter@amd.com 152411886Sbrandon.potter@amd.com return 0; 15251706SN/A} 15261706SN/A 15271706SN/A/// Target statfs() handler. 15281706SN/Atemplate <class OS> 152911856Sbrandon.potter@amd.comSyscallReturn 15301706SN/AstatfsFunc(SyscallDesc *desc, int callnum, Process *process, 15316701Sgblack@eecs.umich.edu ThreadContext *tc) 153211856Sbrandon.potter@amd.com{ 153311856Sbrandon.potter@amd.com#if NO_STATFS 15341706SN/A warn("Host OS cannot support calls to statfs. Ignoring syscall"); 153511856Sbrandon.potter@amd.com#else 153611856Sbrandon.potter@amd.com std::string path; 15371706SN/A 153811856Sbrandon.potter@amd.com int index = 0; 15391706SN/A if (!tc->getMemProxy().tryReadString(path, 15401706SN/A process->getSyscallArg(tc, index))) { 154110931Sbrandon.potter@amd.com return -EFAULT; 15421706SN/A } 15431706SN/A Addr bufPtr = process->getSyscallArg(tc, index); 15442218SN/A 15451706SN/A // Adjust path for cwd and redirection 154611759Sbrandon.potter@amd.com path = process->checkPathRedirect(path); 15471706SN/A 15481706SN/A struct statfs hostBuf; 15491706SN/A int result = statfs(path.c_str(), &hostBuf); 15501706SN/A 155113572Sbrandon.potter@amd.com if (result < 0) 155213572Sbrandon.potter@amd.com return -errno; 155313572Sbrandon.potter@amd.com 155413572Sbrandon.potter@amd.com copyOutStatfsBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 155513572Sbrandon.potter@amd.com#endif 155613572Sbrandon.potter@amd.com return 0; 155713572Sbrandon.potter@amd.com} 155813572Sbrandon.potter@amd.com 155913572Sbrandon.potter@amd.comtemplate <class OS> 156013572Sbrandon.potter@amd.comSyscallReturn 156113572Sbrandon.potter@amd.comcloneFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 156213572Sbrandon.potter@amd.com{ 156313572Sbrandon.potter@amd.com int index = 0; 156413572Sbrandon.potter@amd.com 156513572Sbrandon.potter@amd.com RegVal flags = p->getSyscallArg(tc, index); 156613572Sbrandon.potter@amd.com RegVal newStack = p->getSyscallArg(tc, index); 156713572Sbrandon.potter@amd.com Addr ptidPtr = p->getSyscallArg(tc, index); 156813572Sbrandon.potter@amd.com 156913572Sbrandon.potter@amd.com#if THE_ISA == RISCV_ISA or THE_ISA == ARM_ISA 157013572Sbrandon.potter@amd.com /** 157113572Sbrandon.potter@amd.com * Linux sets CLONE_BACKWARDS flag for RISC-V and Arm. 157213572Sbrandon.potter@amd.com * The flag defines the list of clone() arguments in the following 157313572Sbrandon.potter@amd.com * order: flags -> newStack -> ptidPtr -> tlsPtr -> ctidPtr 157413572Sbrandon.potter@amd.com */ 157513572Sbrandon.potter@amd.com Addr tlsPtr = p->getSyscallArg(tc, index); 157613572Sbrandon.potter@amd.com Addr ctidPtr = p->getSyscallArg(tc, index); 157713572Sbrandon.potter@amd.com#else 157813572Sbrandon.potter@amd.com Addr ctidPtr = p->getSyscallArg(tc, index); 157913572Sbrandon.potter@amd.com Addr tlsPtr = p->getSyscallArg(tc, index); 158013572Sbrandon.potter@amd.com#endif 158113572Sbrandon.potter@amd.com 158213572Sbrandon.potter@amd.com if (((flags & OS::TGT_CLONE_SIGHAND)&& !(flags & OS::TGT_CLONE_VM)) || 158313572Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_THREAD) && !(flags & OS::TGT_CLONE_SIGHAND)) || 158413572Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_FS) && (flags & OS::TGT_CLONE_NEWNS)) || 158513572Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_NEWIPC) && (flags & OS::TGT_CLONE_SYSVSEM)) || 158613572Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_NEWPID) && (flags & OS::TGT_CLONE_THREAD)) || 158713572Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_VM) && !(newStack))) 158813572Sbrandon.potter@amd.com return -EINVAL; 15891706SN/A 15901999SN/A ThreadContext *ctc; 15911999SN/A if (!(ctc = p->findFreeContext())) { 15921999SN/A DPRINTF_SYSCALL(Verbose, "clone: no spare thread context in system" 159311856Sbrandon.potter@amd.com "[cpu %d, thread %d]", tc->cpuId(), tc->threadId()); 15941999SN/A return -EAGAIN; 15956701Sgblack@eecs.umich.edu } 159611856Sbrandon.potter@amd.com 159710931Sbrandon.potter@amd.com /** 159811856Sbrandon.potter@amd.com * Note that ProcessParams is generated by swig and there are no other 159911856Sbrandon.potter@amd.com * examples of how to create anything but this default constructor. The 16001999SN/A * fields are manually initialized instead of passing parameters to the 160111856Sbrandon.potter@amd.com * constructor. 16021999SN/A */ 160311856Sbrandon.potter@amd.com ProcessParams *pp = new ProcessParams(); 160411856Sbrandon.potter@amd.com pp->executable.assign(*(new std::string(p->progName()))); 160511856Sbrandon.potter@amd.com pp->cmd.push_back(*(new std::string(p->progName()))); 16061999SN/A pp->system = p->system; 16076227Snate@binkert.org pp->cwd.assign(p->tgtCwd); 16081999SN/A pp->input.assign("stdin"); 16092461SN/A pp->output.assign("stdout"); 161011856Sbrandon.potter@amd.com pp->errout.assign("stderr"); 161111856Sbrandon.potter@amd.com pp->uid = p->uid(); 16128737Skoansin.tan@gmail.com pp->euid = p->euid(); 16131999SN/A pp->gid = p->gid(); 161411856Sbrandon.potter@amd.com pp->egid = p->egid(); 161511856Sbrandon.potter@amd.com 16161999SN/A /* Find the first free PID that's less than the maximum */ 16171999SN/A std::set<int> const& pids = p->system->PIDs; 161810931Sbrandon.potter@amd.com int temp_pid = *pids.begin(); 16191999SN/A do { 16206227Snate@binkert.org temp_pid++; 16211999SN/A } while (pids.find(temp_pid) != pids.end()); 16221999SN/A if (temp_pid >= System::maxPID) 162313572Sbrandon.potter@amd.com fatal("temp_pid is too large: %d", temp_pid); 16241999SN/A 16251999SN/A pp->pid = temp_pid; 162611385Sbrandon.potter@amd.com pp->ppid = (flags & OS::TGT_CLONE_THREAD) ? p->ppid() : p->pid(); 1627360SN/A pp->useArchPT = p->useArchPT; 16281450SN/A pp->kvmInSE = p->kvmInSE; 162911851Sbrandon.potter@amd.com Process *cp = pp->create(); 163011385Sbrandon.potter@amd.com delete pp; 1631360SN/A 16326701Sgblack@eecs.umich.edu Process *owner = ctc->getProcessPtr(); 16336701Sgblack@eecs.umich.edu ctc->setProcessPtr(cp); 16346701Sgblack@eecs.umich.edu cp->assignThreadContext(ctc->contextId()); 163511383Sbrandon.potter@amd.com owner->revokeThreadContext(ctc->contextId()); 163611383Sbrandon.potter@amd.com 16378324Ssteve.reinhardt@amd.com if (flags & OS::TGT_CLONE_PARENT_SETTID) { 163810486Stjablin@gmail.com BufferArg ptidBuf(ptidPtr, sizeof(long)); 1639360SN/A long *ptid = (long *)ptidBuf.bufferPtr(); 164011385Sbrandon.potter@amd.com *ptid = cp->pid(); 164111385Sbrandon.potter@amd.com ptidBuf.copyOut(tc->getMemProxy()); 16429008Sgblack@eecs.umich.edu } 164311383Sbrandon.potter@amd.com 164411383Sbrandon.potter@amd.com if (flags & OS::TGT_CLONE_THREAD) { 164511383Sbrandon.potter@amd.com cp->pTable->shared = true; 164611383Sbrandon.potter@amd.com cp->useForClone = true; 164711383Sbrandon.potter@amd.com } 164811383Sbrandon.potter@amd.com cp->initState(); 164911383Sbrandon.potter@amd.com p->clone(tc, ctc, cp, flags); 165011383Sbrandon.potter@amd.com 165111383Sbrandon.potter@amd.com if (flags & OS::TGT_CLONE_THREAD) { 16528324Ssteve.reinhardt@amd.com delete cp->sigchld; 165311383Sbrandon.potter@amd.com cp->sigchld = p->sigchld; 165411383Sbrandon.potter@amd.com } else if (flags & OS::TGT_SIGCHLD) { 165511383Sbrandon.potter@amd.com *cp->sigchld = true; 165611383Sbrandon.potter@amd.com } 165711383Sbrandon.potter@amd.com 165811383Sbrandon.potter@amd.com if (flags & OS::TGT_CLONE_CHILD_SETTID) { 165911383Sbrandon.potter@amd.com BufferArg ctidBuf(ctidPtr, sizeof(long)); 166011383Sbrandon.potter@amd.com long *ctid = (long *)ctidBuf.bufferPtr(); 166111383Sbrandon.potter@amd.com *ctid = cp->pid(); 166211383Sbrandon.potter@amd.com ctidBuf.copyOut(ctc->getMemProxy()); 166311383Sbrandon.potter@amd.com } 166411383Sbrandon.potter@amd.com 166511383Sbrandon.potter@amd.com if (flags & OS::TGT_CLONE_CHILD_CLEARTID) 166611383Sbrandon.potter@amd.com cp->childClearTID = (uint64_t)ctidPtr; 166711383Sbrandon.potter@amd.com 166811383Sbrandon.potter@amd.com ctc->clearArchRegs(); 166911383Sbrandon.potter@amd.com 167011383Sbrandon.potter@amd.com OS::archClone(flags, p, cp, tc, ctc, newStack, tlsPtr); 167111383Sbrandon.potter@amd.com 167211383Sbrandon.potter@amd.com cp->setSyscallReturn(ctc, 0); 167311383Sbrandon.potter@amd.com 167411383Sbrandon.potter@amd.com#if THE_ISA == ALPHA_ISA 167511383Sbrandon.potter@amd.com ctc->setIntReg(TheISA::SyscallSuccessReg, 0); 167611383Sbrandon.potter@amd.com#elif THE_ISA == SPARC_ISA 16778324Ssteve.reinhardt@amd.com tc->setIntReg(TheISA::SyscallPseudoReturnReg, 0); 16785877Shsul@eecs.umich.edu ctc->setIntReg(TheISA::SyscallPseudoReturnReg, 1); 167910486Stjablin@gmail.com#endif 168010486Stjablin@gmail.com 168111383Sbrandon.potter@amd.com if (p->kvmInSE) { 168211383Sbrandon.potter@amd.com#if THE_ISA == X86_ISA 168311383Sbrandon.potter@amd.com ctc->pcState(tc->readIntReg(TheISA::INTREG_RCX)); 168411856Sbrandon.potter@amd.com#else 168511624Smichael.lebeane@amd.com panic("KVM CPU model is not supported for this ISA"); 168611856Sbrandon.potter@amd.com#endif 168711856Sbrandon.potter@amd.com } else { 168811856Sbrandon.potter@amd.com TheISA::PCState cpc = tc->pcState(); 168911856Sbrandon.potter@amd.com cpc.advance(); 169011624Smichael.lebeane@amd.com ctc->pcState(cpc); 169111624Smichael.lebeane@amd.com } 169211624Smichael.lebeane@amd.com ctc->activate(); 169311856Sbrandon.potter@amd.com 169411856Sbrandon.potter@amd.com return cp->pid(); 169511383Sbrandon.potter@amd.com} 169611856Sbrandon.potter@amd.com 1697360SN/A/// Target fstatfs() handler. 169811913SBrandon.Potter@amd.comtemplate <class OS> 169911383Sbrandon.potter@amd.comSyscallReturn 17008600Ssteve.reinhardt@amd.comfstatfsFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 170111383Sbrandon.potter@amd.com{ 170211383Sbrandon.potter@amd.com int index = 0; 170311383Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 17048600Ssteve.reinhardt@amd.com Addr bufPtr = p->getSyscallArg(tc, index); 17052544SN/A 17062544SN/A auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 170711383Sbrandon.potter@amd.com if (!ffdp) 170811383Sbrandon.potter@amd.com return -EBADF; 170911383Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 171011905SBrandon.Potter@amd.com 171111905SBrandon.Potter@amd.com struct statfs hostBuf; 171211905SBrandon.Potter@amd.com int result = fstatfs(sim_fd, &hostBuf); 171311905SBrandon.Potter@amd.com 171411905SBrandon.Potter@amd.com if (result < 0) 171511905SBrandon.Potter@amd.com return -errno; 171611905SBrandon.Potter@amd.com 171711383Sbrandon.potter@amd.com copyOutStatfsBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 171811383Sbrandon.potter@amd.com 171911383Sbrandon.potter@amd.com return 0; 172011383Sbrandon.potter@amd.com} 172111383Sbrandon.potter@amd.com 172211383Sbrandon.potter@amd.com/// Target readv() handler. 172311383Sbrandon.potter@amd.comtemplate <class OS> 172411383Sbrandon.potter@amd.comSyscallReturn 172511383Sbrandon.potter@amd.comreadvFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 172611383Sbrandon.potter@amd.com{ 172711383Sbrandon.potter@amd.com int index = 0; 172811383Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 172911383Sbrandon.potter@amd.com 173011383Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 173111383Sbrandon.potter@amd.com if (!ffdp) 17328600Ssteve.reinhardt@amd.com return -EBADF; 17336672Sgblack@eecs.umich.edu int sim_fd = ffdp->getSimFD(); 17348600Ssteve.reinhardt@amd.com 173511383Sbrandon.potter@amd.com SETranslatingPortProxy &prox = tc->getMemProxy(); 173611383Sbrandon.potter@amd.com uint64_t tiov_base = p->getSyscallArg(tc, index); 173711383Sbrandon.potter@amd.com size_t count = p->getSyscallArg(tc, index); 17388601Ssteve.reinhardt@amd.com typename OS::tgt_iovec tiov[count]; 17392544SN/A struct iovec hiov[count]; 174011383Sbrandon.potter@amd.com for (size_t i = 0; i < count; ++i) { 174111383Sbrandon.potter@amd.com prox.readBlob(tiov_base + (i * sizeof(typename OS::tgt_iovec)), 174211383Sbrandon.potter@amd.com (uint8_t*)&tiov[i], sizeof(typename OS::tgt_iovec)); 174311383Sbrandon.potter@amd.com hiov[i].iov_len = TheISA::gtoh(tiov[i].iov_len); 174411383Sbrandon.potter@amd.com hiov[i].iov_base = new char [hiov[i].iov_len]; 174511383Sbrandon.potter@amd.com } 174611383Sbrandon.potter@amd.com 174711383Sbrandon.potter@amd.com int result = readv(sim_fd, hiov, count); 174811383Sbrandon.potter@amd.com int local_errno = errno; 174911383Sbrandon.potter@amd.com 175011383Sbrandon.potter@amd.com for (size_t i = 0; i < count; ++i) { 175111383Sbrandon.potter@amd.com if (result != -1) { 175211383Sbrandon.potter@amd.com prox.writeBlob(TheISA::htog(tiov[i].iov_base), 175311383Sbrandon.potter@amd.com (uint8_t*)hiov[i].iov_base, hiov[i].iov_len); 175411383Sbrandon.potter@amd.com } 175511383Sbrandon.potter@amd.com delete [] (char *)hiov[i].iov_base; 175611383Sbrandon.potter@amd.com } 175711383Sbrandon.potter@amd.com 175811383Sbrandon.potter@amd.com return (result == -1) ? -local_errno : result; 175911383Sbrandon.potter@amd.com} 176011383Sbrandon.potter@amd.com 176111383Sbrandon.potter@amd.com/// Target writev() handler. 176211383Sbrandon.potter@amd.comtemplate <class OS> 176311383Sbrandon.potter@amd.comSyscallReturn 176411383Sbrandon.potter@amd.comwritevFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 176511383Sbrandon.potter@amd.com{ 176611383Sbrandon.potter@amd.com int index = 0; 176711383Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 176811383Sbrandon.potter@amd.com 176911383Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 177011383Sbrandon.potter@amd.com if (!hbfdp) 177111383Sbrandon.potter@amd.com return -EBADF; 177211392Sbrandon.potter@amd.com int sim_fd = hbfdp->getSimFD(); 177311392Sbrandon.potter@amd.com 177411392Sbrandon.potter@amd.com SETranslatingPortProxy &prox = tc->getMemProxy(); 177511392Sbrandon.potter@amd.com uint64_t tiov_base = p->getSyscallArg(tc, index); 177611392Sbrandon.potter@amd.com size_t count = p->getSyscallArg(tc, index); 177711392Sbrandon.potter@amd.com struct iovec hiov[count]; 177811392Sbrandon.potter@amd.com for (size_t i = 0; i < count; ++i) { 177911392Sbrandon.potter@amd.com typename OS::tgt_iovec tiov; 178011392Sbrandon.potter@amd.com 178111392Sbrandon.potter@amd.com prox.readBlob(tiov_base + i*sizeof(typename OS::tgt_iovec), 178211392Sbrandon.potter@amd.com (uint8_t*)&tiov, sizeof(typename OS::tgt_iovec)); 178311392Sbrandon.potter@amd.com hiov[i].iov_len = TheISA::gtoh(tiov.iov_len); 178411392Sbrandon.potter@amd.com hiov[i].iov_base = new char [hiov[i].iov_len]; 178511392Sbrandon.potter@amd.com prox.readBlob(TheISA::gtoh(tiov.iov_base), (uint8_t *)hiov[i].iov_base, 178611856Sbrandon.potter@amd.com hiov[i].iov_len); 178711856Sbrandon.potter@amd.com } 178811856Sbrandon.potter@amd.com 178911392Sbrandon.potter@amd.com int result = writev(sim_fd, hiov, count); 179011392Sbrandon.potter@amd.com 179111392Sbrandon.potter@amd.com for (size_t i = 0; i < count; ++i) 179211392Sbrandon.potter@amd.com delete [] (char *)hiov[i].iov_base; 179311392Sbrandon.potter@amd.com 179411392Sbrandon.potter@amd.com return (result == -1) ? -errno : result; 179511392Sbrandon.potter@amd.com} 179611392Sbrandon.potter@amd.com 179711383Sbrandon.potter@amd.com/// Real mmap handler. 179811383Sbrandon.potter@amd.comtemplate <class OS> 179911383Sbrandon.potter@amd.comSyscallReturn 180011383Sbrandon.potter@amd.commmapImpl(SyscallDesc *desc, int num, Process *p, ThreadContext *tc, 180111383Sbrandon.potter@amd.com bool is_mmap2) 18021458SN/A{ 1803360SN/A int index = 0; 1804360SN/A Addr start = p->getSyscallArg(tc, index); 180511593Santhony.gutierrez@amd.com uint64_t length = p->getSyscallArg(tc, index); 180611593Santhony.gutierrez@amd.com int prot = p->getSyscallArg(tc, index); 180711851Sbrandon.potter@amd.com int tgt_flags = p->getSyscallArg(tc, index); 180811593Santhony.gutierrez@amd.com int tgt_fd = p->getSyscallArg(tc, index); 180911593Santhony.gutierrez@amd.com int offset = p->getSyscallArg(tc, index); 181011593Santhony.gutierrez@amd.com 181111593Santhony.gutierrez@amd.com if (is_mmap2) 181211593Santhony.gutierrez@amd.com offset *= TheISA::PageBytes; 181311593Santhony.gutierrez@amd.com 181411593Santhony.gutierrez@amd.com if (start & (TheISA::PageBytes - 1) || 181511856Sbrandon.potter@amd.com offset & (TheISA::PageBytes - 1) || 181611856Sbrandon.potter@amd.com (tgt_flags & OS::TGT_MAP_PRIVATE && 181711593Santhony.gutierrez@amd.com tgt_flags & OS::TGT_MAP_SHARED) || 181811856Sbrandon.potter@amd.com (!(tgt_flags & OS::TGT_MAP_PRIVATE) && 181911593Santhony.gutierrez@amd.com !(tgt_flags & OS::TGT_MAP_SHARED)) || 182011593Santhony.gutierrez@amd.com !length) { 182111593Santhony.gutierrez@amd.com return -EINVAL; 182211593Santhony.gutierrez@amd.com } 182311594Santhony.gutierrez@amd.com 182411593Santhony.gutierrez@amd.com if ((prot & PROT_WRITE) && (tgt_flags & OS::TGT_MAP_SHARED)) { 182511593Santhony.gutierrez@amd.com // With shared mmaps, there are two cases to consider: 182611593Santhony.gutierrez@amd.com // 1) anonymous: writes should modify the mapping and this should be 182711593Santhony.gutierrez@amd.com // visible to observers who share the mapping. Currently, it's 182811385Sbrandon.potter@amd.com // difficult to update the shared mapping because there's no 182911385Sbrandon.potter@amd.com // structure which maintains information about the which virtual 183011385Sbrandon.potter@amd.com // memory areas are shared. If that structure existed, it would be 183111851Sbrandon.potter@amd.com // possible to make the translations point to the same frames. 183211385Sbrandon.potter@amd.com // 2) file-backed: writes should modify the mapping and the file 183311385Sbrandon.potter@amd.com // which is backed by the mapping. The shared mapping problem is the 183411385Sbrandon.potter@amd.com // same as what was mentioned about the anonymous mappings. For 183511385Sbrandon.potter@amd.com // file-backed mappings, the writes to the file are difficult 183611385Sbrandon.potter@amd.com // because it requires syncing what the mapping holds with the file 183711385Sbrandon.potter@amd.com // that resides on the host system. So, any write on a real system 183811385Sbrandon.potter@amd.com // would cause the change to be propagated to the file mapping at 183911851Sbrandon.potter@amd.com // some point in the future (the inode is tracked along with the 184011385Sbrandon.potter@amd.com // mapping). This isn't guaranteed to always happen, but it usually 184111385Sbrandon.potter@amd.com // works well enough. The guarantee is provided by the msync system 184211385Sbrandon.potter@amd.com // call. We could force the change through with shared mappings with 184311385Sbrandon.potter@amd.com // a call to msync, but that again would require more information 1844378SN/A // than we currently maintain. 1845360SN/A warn("mmap: writing to shared mmap region is currently " 18461450SN/A "unsupported. The write succeeds on the target, but it " 184711851Sbrandon.potter@amd.com "will not be propagated to the host or shared mappings"); 184811851Sbrandon.potter@amd.com } 1849360SN/A 18506701Sgblack@eecs.umich.edu length = roundUp(length, TheISA::PageBytes); 18516701Sgblack@eecs.umich.edu 18526701Sgblack@eecs.umich.edu int sim_fd = -1; 1853360SN/A uint8_t *pmap = nullptr; 1854360SN/A if (!(tgt_flags & OS::TGT_MAP_ANONYMOUS)) { 185511906SBrandon.Potter@amd.com std::shared_ptr<FDEntry> fdep = (*p->fds)[tgt_fd]; 185611906SBrandon.Potter@amd.com 185711906SBrandon.Potter@amd.com auto dfdp = std::dynamic_pointer_cast<DeviceFDEntry>(fdep); 185811906SBrandon.Potter@amd.com if (dfdp) { 185911906SBrandon.Potter@amd.com EmulatedDriver *emul_driver = dfdp->getDriver(); 186011906SBrandon.Potter@amd.com return emul_driver->mmap(p, tc, start, length, prot, 1861360SN/A tgt_flags, tgt_fd, offset); 186211906SBrandon.Potter@amd.com } 186311906SBrandon.Potter@amd.com 186411906SBrandon.Potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(fdep); 186511906SBrandon.Potter@amd.com if (!ffdp) 186611906SBrandon.Potter@amd.com return -EBADF; 186711906SBrandon.Potter@amd.com sim_fd = ffdp->getSimFD(); 18685877Shsul@eecs.umich.edu 186911906SBrandon.Potter@amd.com pmap = (decltype(pmap))mmap(nullptr, length, PROT_READ, MAP_PRIVATE, 187011906SBrandon.Potter@amd.com sim_fd, offset); 187111906SBrandon.Potter@amd.com 187211906SBrandon.Potter@amd.com if (pmap == (decltype(pmap))-1) { 1873360SN/A warn("mmap: failed to map file into host address space"); 1874360SN/A return -errno; 18758706Sandreas.hansson@arm.com } 18761458SN/A } 1877360SN/A 1878360SN/A // Extend global mmap region if necessary. Note that we ignore the 187912235Sar4jc@virginia.edu // start address unless MAP_FIXED is specified. 188012235Sar4jc@virginia.edu if (!(tgt_flags & OS::TGT_MAP_FIXED)) { 188112235Sar4jc@virginia.edu std::shared_ptr<MemState> mem_state = p->memState; 188212235Sar4jc@virginia.edu Addr mmap_end = mem_state->getMmapEnd(); 188312235Sar4jc@virginia.edu 188412235Sar4jc@virginia.edu start = p->mmapGrowsDown() ? mmap_end - length : mmap_end; 188512235Sar4jc@virginia.edu mmap_end = p->mmapGrowsDown() ? start : mmap_end + length; 188612235Sar4jc@virginia.edu 188712235Sar4jc@virginia.edu mem_state->setMmapEnd(mmap_end); 188812235Sar4jc@virginia.edu } 188912235Sar4jc@virginia.edu 189012235Sar4jc@virginia.edu DPRINTF_SYSCALL(Verbose, " mmap range is 0x%x - 0x%x\n", 189112235Sar4jc@virginia.edu start, start + length - 1); 189212235Sar4jc@virginia.edu 189312235Sar4jc@virginia.edu // We only allow mappings to overwrite existing mappings if 189412235Sar4jc@virginia.edu // TGT_MAP_FIXED is set. Otherwise it shouldn't be a problem 189512235Sar4jc@virginia.edu // because we ignore the start hint if TGT_MAP_FIXED is not set. 189612235Sar4jc@virginia.edu int clobber = tgt_flags & OS::TGT_MAP_FIXED; 189712416Sqtt2@cornell.edu if (clobber) { 189812235Sar4jc@virginia.edu for (auto tc : p->system->threadContexts) { 189912235Sar4jc@virginia.edu // If we might be overwriting old mappings, we need to 190012235Sar4jc@virginia.edu // invalidate potentially stale mappings out of the TLBs. 190112235Sar4jc@virginia.edu tc->getDTBPtr()->flushAll(); 190212235Sar4jc@virginia.edu tc->getITBPtr()->flushAll(); 190312235Sar4jc@virginia.edu } 190412235Sar4jc@virginia.edu } 190512235Sar4jc@virginia.edu 190612235Sar4jc@virginia.edu // Allocate physical memory and map it in. If the page table is already 190712235Sar4jc@virginia.edu // mapped and clobber is not set, the simulator will issue throw a 190812235Sar4jc@virginia.edu // fatal and bail out of the simulation. 190912235Sar4jc@virginia.edu p->allocateMem(start, length, clobber); 191012593Sjason@lowepower.com 191112235Sar4jc@virginia.edu // Transfer content into target address space. 191212235Sar4jc@virginia.edu SETranslatingPortProxy &tp = tc->getMemProxy(); 191312235Sar4jc@virginia.edu if (tgt_flags & OS::TGT_MAP_ANONYMOUS) { 191412235Sar4jc@virginia.edu // In general, we should zero the mapped area for anonymous mappings, 191512235Sar4jc@virginia.edu // with something like: 191612235Sar4jc@virginia.edu // tp.memsetBlob(start, 0, length); 191712235Sar4jc@virginia.edu // However, given that we don't support sparse mappings, and 191812235Sar4jc@virginia.edu // some applications can map a couple of gigabytes of space 191912235Sar4jc@virginia.edu // (intending sparse usage), that can get painfully expensive. 192012235Sar4jc@virginia.edu // Fortunately, since we don't properly implement munmap either, 192110796Sbrandon.potter@amd.com // there's no danger of remapping used memory, so for now all 192210796Sbrandon.potter@amd.com // newly mapped memory should already be zeroed so we can skip it. 192310796Sbrandon.potter@amd.com } else { 192411851Sbrandon.potter@amd.com // It is possible to mmap an area larger than a file, however 192510796Sbrandon.potter@amd.com // accessing unmapped portions the system triggers a "Bus error" 192610796Sbrandon.potter@amd.com // on the host. We must know when to stop copying the file from 192710796Sbrandon.potter@amd.com // the host into the target address space. 192810796Sbrandon.potter@amd.com struct stat file_stat; 192910796Sbrandon.potter@amd.com if (fstat(sim_fd, &file_stat) > 0) 193010796Sbrandon.potter@amd.com fatal("mmap: cannot stat file"); 193110796Sbrandon.potter@amd.com 193210796Sbrandon.potter@amd.com // Copy the portion of the file that is resident. This requires 193310796Sbrandon.potter@amd.com // checking both the mmap size and the filesize that we are 193410796Sbrandon.potter@amd.com // trying to mmap into this space; the mmap size also depends 193510796Sbrandon.potter@amd.com // on the specified offset into the file. 193610796Sbrandon.potter@amd.com uint64_t size = std::min((uint64_t)file_stat.st_size - offset, 193710796Sbrandon.potter@amd.com length); 193810796Sbrandon.potter@amd.com tp.writeBlob(start, pmap, size); 193910796Sbrandon.potter@amd.com 194011337SMichael.Lebeane@amd.com // Cleanup the mmap region before exiting this function. 194111337SMichael.Lebeane@amd.com munmap(pmap, length); 194211337SMichael.Lebeane@amd.com 194311851Sbrandon.potter@amd.com // Maintain the symbol table for dynamic executables. 194411337SMichael.Lebeane@amd.com // The loader will call mmap to map the images into its address 194511337SMichael.Lebeane@amd.com // space and we intercept that here. We can verify that we are 194611337SMichael.Lebeane@amd.com // executing inside the loader by checking the program counter value. 194711337SMichael.Lebeane@amd.com // XXX: with multiprogrammed workloads or multi-node configurations, 194811337SMichael.Lebeane@amd.com // this will not work since there is a single global symbol table. 194911337SMichael.Lebeane@amd.com ObjectFile *interpreter = p->getInterpreter(); 195011337SMichael.Lebeane@amd.com if (interpreter) { 195111337SMichael.Lebeane@amd.com Addr text_start = interpreter->textBase(); 195211337SMichael.Lebeane@amd.com Addr text_end = text_start + interpreter->textSize(); 195311337SMichael.Lebeane@amd.com 195411337SMichael.Lebeane@amd.com Addr pc = tc->pcState().pc(); 195511337SMichael.Lebeane@amd.com 195611337SMichael.Lebeane@amd.com if (pc >= text_start && pc < text_end) { 1957378SN/A std::shared_ptr<FDEntry> fdep = (*p->fds)[tgt_fd]; 1958360SN/A auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(fdep); 19591450SN/A ObjectFile *lib = createObjectFile(ffdp->getFileName()); 196011851Sbrandon.potter@amd.com 196111851Sbrandon.potter@amd.com if (lib) { 1962360SN/A lib->loadAllSymbols(debugSymbolTable, 19636701Sgblack@eecs.umich.edu lib->textBase(), start); 19646701Sgblack@eecs.umich.edu } 1965360SN/A } 196610796Sbrandon.potter@amd.com } 1967360SN/A 19686109Ssanchezd@stanford.edu // Note that we do not zero out the remainder of the mapping. This 19696109Ssanchezd@stanford.edu // is done by a real system, but it probably will not affect 1970360SN/A // execution (hopefully). 19718706Sandreas.hansson@arm.com } 1972360SN/A 19731458SN/A return start; 1974360SN/A} 1975360SN/A 1976360SN/Atemplate <class OS> 19771999SN/ASyscallReturn 19781999SN/Apwrite64Func(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 19791999SN/A{ 198011851Sbrandon.potter@amd.com int index = 0; 19812680Sktlim@umich.edu int tgt_fd = p->getSyscallArg(tc, index); 19821999SN/A Addr bufPtr = p->getSyscallArg(tc, index); 19831999SN/A int nbytes = p->getSyscallArg(tc, index); 19841999SN/A int offset = p->getSyscallArg(tc, index); 19856701Sgblack@eecs.umich.edu 19868852Sandreas.hansson@arm.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 19876701Sgblack@eecs.umich.edu if (!ffdp) 19886701Sgblack@eecs.umich.edu return -EBADF; 19896701Sgblack@eecs.umich.edu int sim_fd = ffdp->getSimFD(); 19901999SN/A 19916701Sgblack@eecs.umich.edu BufferArg bufArg(bufPtr, nbytes); 19926701Sgblack@eecs.umich.edu bufArg.copyIn(tc->getMemProxy()); 19938706Sandreas.hansson@arm.com 19941999SN/A int bytes_written = pwrite(sim_fd, bufArg.bufferPtr(), nbytes, offset); 19951999SN/A 199611906SBrandon.Potter@amd.com return (bytes_written == -1) ? -errno : bytes_written; 19978737Skoansin.tan@gmail.com} 19988737Skoansin.tan@gmail.com 19991999SN/A/// Target mmap() handler. 20003669Sbinkertn@umich.edutemplate <class OS> 20013669Sbinkertn@umich.eduSyscallReturn 20023669Sbinkertn@umich.edummapFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 20033669Sbinkertn@umich.edu{ 20041999SN/A return mmapImpl<OS>(desc, num, p, tc, false); 20051999SN/A} 20061999SN/A 20071999SN/A/// Target mmap2() handler. 20081999SN/Atemplate <class OS> 20091999SN/ASyscallReturn 20101999SN/Ammap2Func(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 201111886Sbrandon.potter@amd.com{ 201211886Sbrandon.potter@amd.com return mmapImpl<OS>(desc, num, p, tc, true); 201311886Sbrandon.potter@amd.com} 201411886Sbrandon.potter@amd.com 201511886Sbrandon.potter@amd.com/// Target getrlimit() handler. 201611886Sbrandon.potter@amd.comtemplate <class OS> 201711886Sbrandon.potter@amd.comSyscallReturn 201811886Sbrandon.potter@amd.comgetrlimitFunc(SyscallDesc *desc, int callnum, Process *process, 201911886Sbrandon.potter@amd.com ThreadContext *tc) 202011886Sbrandon.potter@amd.com{ 202111886Sbrandon.potter@amd.com int index = 0; 202211886Sbrandon.potter@amd.com unsigned resource = process->getSyscallArg(tc, index); 202311886Sbrandon.potter@amd.com TypedBufferArg<typename OS::rlimit> rlp(process->getSyscallArg(tc, index)); 202411886Sbrandon.potter@amd.com 202511886Sbrandon.potter@amd.com switch (resource) { 202611886Sbrandon.potter@amd.com case OS::TGT_RLIMIT_STACK: 202711886Sbrandon.potter@amd.com // max stack size in bytes: make up a number (8MB for now) 202811886Sbrandon.potter@amd.com rlp->rlim_cur = rlp->rlim_max = 8 * 1024 * 1024; 202911886Sbrandon.potter@amd.com rlp->rlim_cur = TheISA::htog(rlp->rlim_cur); 203011886Sbrandon.potter@amd.com rlp->rlim_max = TheISA::htog(rlp->rlim_max); 203111886Sbrandon.potter@amd.com break; 203211886Sbrandon.potter@amd.com 203311886Sbrandon.potter@amd.com case OS::TGT_RLIMIT_DATA: 203411886Sbrandon.potter@amd.com // max data segment size in bytes: make up a number 203511886Sbrandon.potter@amd.com rlp->rlim_cur = rlp->rlim_max = 256 * 1024 * 1024; 203611886Sbrandon.potter@amd.com rlp->rlim_cur = TheISA::htog(rlp->rlim_cur); 203711886Sbrandon.potter@amd.com rlp->rlim_max = TheISA::htog(rlp->rlim_max); 203811886Sbrandon.potter@amd.com break; 203911886Sbrandon.potter@amd.com 204011886Sbrandon.potter@amd.com default: 204111886Sbrandon.potter@amd.com warn("getrlimit: unimplemented resource %d", resource); 204211886Sbrandon.potter@amd.com return -EINVAL; 204311886Sbrandon.potter@amd.com break; 204411886Sbrandon.potter@amd.com } 204511886Sbrandon.potter@amd.com 204611886Sbrandon.potter@amd.com rlp.copyOut(tc->getMemProxy()); 204711886Sbrandon.potter@amd.com return 0; 204811886Sbrandon.potter@amd.com} 204911886Sbrandon.potter@amd.com 205011886Sbrandon.potter@amd.comtemplate <class OS> 205111886Sbrandon.potter@amd.comSyscallReturn 205211886Sbrandon.potter@amd.comprlimitFunc(SyscallDesc *desc, int callnum, Process *process, 205311886Sbrandon.potter@amd.com ThreadContext *tc) 205411886Sbrandon.potter@amd.com{ 205511886Sbrandon.potter@amd.com int index = 0; 205611886Sbrandon.potter@amd.com if (process->getSyscallArg(tc, index) != 0) 205711886Sbrandon.potter@amd.com { 205811886Sbrandon.potter@amd.com warn("prlimit: ignoring rlimits for nonzero pid"); 205911886Sbrandon.potter@amd.com return -EPERM; 206011886Sbrandon.potter@amd.com } 206111886Sbrandon.potter@amd.com int resource = process->getSyscallArg(tc, index); 206211886Sbrandon.potter@amd.com Addr n = process->getSyscallArg(tc, index); 206311886Sbrandon.potter@amd.com if (n != 0) 206411886Sbrandon.potter@amd.com warn("prlimit: ignoring new rlimit"); 206511886Sbrandon.potter@amd.com Addr o = process->getSyscallArg(tc, index); 206611886Sbrandon.potter@amd.com if (o != 0) 206711886Sbrandon.potter@amd.com { 206811886Sbrandon.potter@amd.com TypedBufferArg<typename OS::rlimit> rlp(o); 206911886Sbrandon.potter@amd.com switch (resource) { 207011886Sbrandon.potter@amd.com case OS::TGT_RLIMIT_STACK: 207111886Sbrandon.potter@amd.com // max stack size in bytes: make up a number (8MB for now) 207211886Sbrandon.potter@amd.com rlp->rlim_cur = rlp->rlim_max = 8 * 1024 * 1024; 207311886Sbrandon.potter@amd.com rlp->rlim_cur = TheISA::htog(rlp->rlim_cur); 207411886Sbrandon.potter@amd.com rlp->rlim_max = TheISA::htog(rlp->rlim_max); 207511886Sbrandon.potter@amd.com break; 207611886Sbrandon.potter@amd.com case OS::TGT_RLIMIT_DATA: 207711886Sbrandon.potter@amd.com // max data segment size in bytes: make up a number 207811886Sbrandon.potter@amd.com rlp->rlim_cur = rlp->rlim_max = 256*1024*1024; 207911886Sbrandon.potter@amd.com rlp->rlim_cur = TheISA::htog(rlp->rlim_cur); 208011886Sbrandon.potter@amd.com rlp->rlim_max = TheISA::htog(rlp->rlim_max); 208111886Sbrandon.potter@amd.com break; 208211886Sbrandon.potter@amd.com default: 208311886Sbrandon.potter@amd.com warn("prlimit: unimplemented resource %d", resource); 208411886Sbrandon.potter@amd.com return -EINVAL; 208511886Sbrandon.potter@amd.com break; 208611886Sbrandon.potter@amd.com } 208711886Sbrandon.potter@amd.com rlp.copyOut(tc->getMemProxy()); 208811886Sbrandon.potter@amd.com } 208911886Sbrandon.potter@amd.com return 0; 209011886Sbrandon.potter@amd.com} 209111886Sbrandon.potter@amd.com 209211886Sbrandon.potter@amd.com/// Target clock_gettime() function. 209311886Sbrandon.potter@amd.comtemplate <class OS> 209411886Sbrandon.potter@amd.comSyscallReturn 209511886Sbrandon.potter@amd.comclock_gettimeFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 209611886Sbrandon.potter@amd.com{ 209711886Sbrandon.potter@amd.com int index = 1; 209811886Sbrandon.potter@amd.com //int clk_id = p->getSyscallArg(tc, index); 209911886Sbrandon.potter@amd.com TypedBufferArg<typename OS::timespec> tp(p->getSyscallArg(tc, index)); 210011886Sbrandon.potter@amd.com 210111886Sbrandon.potter@amd.com getElapsedTimeNano(tp->tv_sec, tp->tv_nsec); 210211886Sbrandon.potter@amd.com tp->tv_sec += seconds_since_epoch; 210311886Sbrandon.potter@amd.com tp->tv_sec = TheISA::htog(tp->tv_sec); 2104378SN/A tp->tv_nsec = TheISA::htog(tp->tv_nsec); 2105360SN/A 21061450SN/A tp.copyOut(tc->getMemProxy()); 210711851Sbrandon.potter@amd.com 21082680Sktlim@umich.edu return 0; 2109360SN/A} 21106701Sgblack@eecs.umich.edu 21116701Sgblack@eecs.umich.edu/// Target clock_getres() function. 21126701Sgblack@eecs.umich.edutemplate <class OS> 2113360SN/ASyscallReturn 21143670Sbinkertn@umich.educlock_getresFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 21153670Sbinkertn@umich.edu{ 2116360SN/A int index = 1; 2117360SN/A TypedBufferArg<typename OS::timespec> tp(p->getSyscallArg(tc, index)); 2118360SN/A 2119360SN/A // Set resolution at ns, which is what clock_gettime() returns 2120360SN/A tp->tv_sec = 0; 2121360SN/A tp->tv_nsec = 1; 2122360SN/A 2123360SN/A tp.copyOut(tc->getMemProxy()); 2124360SN/A 2125360SN/A return 0; 2126360SN/A} 2127360SN/A 2128360SN/A/// Target gettimeofday() handler. 2129360SN/Atemplate <class OS> 2130360SN/ASyscallReturn 2131360SN/AgettimeofdayFunc(SyscallDesc *desc, int callnum, Process *process, 2132360SN/A ThreadContext *tc) 21333670Sbinkertn@umich.edu{ 21343670Sbinkertn@umich.edu int index = 0; 213510796Sbrandon.potter@amd.com TypedBufferArg<typename OS::timeval> tp(process->getSyscallArg(tc, index)); 21368737Skoansin.tan@gmail.com 21378737Skoansin.tan@gmail.com getElapsedTimeMicro(tp->tv_sec, tp->tv_usec); 21383670Sbinkertn@umich.edu tp->tv_sec += seconds_since_epoch; 21393670Sbinkertn@umich.edu tp->tv_sec = TheISA::htog(tp->tv_sec); 21403670Sbinkertn@umich.edu tp->tv_usec = TheISA::htog(tp->tv_usec); 21413670Sbinkertn@umich.edu 21423670Sbinkertn@umich.edu tp.copyOut(tc->getMemProxy()); 21433670Sbinkertn@umich.edu 21443670Sbinkertn@umich.edu return 0; 21453670Sbinkertn@umich.edu} 21463670Sbinkertn@umich.edu 21473670Sbinkertn@umich.edu 21483670Sbinkertn@umich.edu/// Target utimes() handler. 21493670Sbinkertn@umich.edutemplate <class OS> 21503670Sbinkertn@umich.eduSyscallReturn 21518706Sandreas.hansson@arm.comutimesFunc(SyscallDesc *desc, int callnum, Process *process, 2152360SN/A ThreadContext *tc) 21531458SN/A{ 2154360SN/A std::string path; 2155360SN/A 21566683Stjones1@inf.ed.ac.uk int index = 0; 21576683Stjones1@inf.ed.ac.uk if (!tc->getMemProxy().tryReadString(path, 21586683Stjones1@inf.ed.ac.uk process->getSyscallArg(tc, index))) { 215911851Sbrandon.potter@amd.com return -EFAULT; 216011851Sbrandon.potter@amd.com } 21616683Stjones1@inf.ed.ac.uk 21626701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::timeval [2]> 21636701Sgblack@eecs.umich.edu tp(process->getSyscallArg(tc, index)); 21646683Stjones1@inf.ed.ac.uk tp.copyIn(tc->getMemProxy()); 21656683Stjones1@inf.ed.ac.uk 21667823Ssteve.reinhardt@amd.com struct timeval hostTimeval[2]; 21676683Stjones1@inf.ed.ac.uk for (int i = 0; i < 2; ++i) { 21686683Stjones1@inf.ed.ac.uk hostTimeval[i].tv_sec = TheISA::gtoh((*tp)[i].tv_sec); 21696683Stjones1@inf.ed.ac.uk hostTimeval[i].tv_usec = TheISA::gtoh((*tp)[i].tv_usec); 21706683Stjones1@inf.ed.ac.uk } 21716683Stjones1@inf.ed.ac.uk 21726683Stjones1@inf.ed.ac.uk // Adjust path for cwd and redirection 21738737Skoansin.tan@gmail.com path = process->checkPathRedirect(path); 21746683Stjones1@inf.ed.ac.uk 21756683Stjones1@inf.ed.ac.uk int result = utimes(path.c_str(), hostTimeval); 21768706Sandreas.hansson@arm.com 21776683Stjones1@inf.ed.ac.uk if (result < 0) 21786683Stjones1@inf.ed.ac.uk return -errno; 21796683Stjones1@inf.ed.ac.uk 21806683Stjones1@inf.ed.ac.uk return 0; 21812553SN/A} 21826684Stjones1@inf.ed.ac.uk 21836684Stjones1@inf.ed.ac.uktemplate <class OS> 21846684Stjones1@inf.ed.ac.ukSyscallReturn 218511851Sbrandon.potter@amd.comexecveFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 21866684Stjones1@inf.ed.ac.uk{ 21876684Stjones1@inf.ed.ac.uk desc->setFlags(0); 218810796Sbrandon.potter@amd.com 21896684Stjones1@inf.ed.ac.uk int index = 0; 21906684Stjones1@inf.ed.ac.uk std::string path; 21916701Sgblack@eecs.umich.edu SETranslatingPortProxy & mem_proxy = tc->getMemProxy(); 21926701Sgblack@eecs.umich.edu if (!mem_proxy.tryReadString(path, p->getSyscallArg(tc, index))) 219311321Ssteve.reinhardt@amd.com return -EFAULT; 21946684Stjones1@inf.ed.ac.uk 21958737Skoansin.tan@gmail.com if (access(path.c_str(), F_OK) == -1) 21968852Sandreas.hansson@arm.com return -EACCES; 21978852Sandreas.hansson@arm.com 21986684Stjones1@inf.ed.ac.uk auto read_in = [](std::vector<std::string> & vect, 21996684Stjones1@inf.ed.ac.uk SETranslatingPortProxy & mem_proxy, 22006684Stjones1@inf.ed.ac.uk Addr mem_loc) 22012553SN/A { 220211910SBrandon.Potter@amd.com for (int inc = 0; ; inc++) { 220311910SBrandon.Potter@amd.com BufferArg b((mem_loc + sizeof(Addr) * inc), sizeof(Addr)); 220411910SBrandon.Potter@amd.com b.copyIn(mem_proxy); 220511910SBrandon.Potter@amd.com 220611910SBrandon.Potter@amd.com if (!*(Addr*)b.bufferPtr()) 220711910SBrandon.Potter@amd.com break; 220811910SBrandon.Potter@amd.com 220911910SBrandon.Potter@amd.com vect.push_back(std::string()); 221011910SBrandon.Potter@amd.com mem_proxy.tryReadString(vect[inc], *(Addr*)b.bufferPtr()); 221111910SBrandon.Potter@amd.com } 221211910SBrandon.Potter@amd.com }; 221311910SBrandon.Potter@amd.com 221411910SBrandon.Potter@amd.com /** 221511910SBrandon.Potter@amd.com * Note that ProcessParams is generated by swig and there are no other 221611910SBrandon.Potter@amd.com * examples of how to create anything but this default constructor. The 221711910SBrandon.Potter@amd.com * fields are manually initialized instead of passing parameters to the 221811910SBrandon.Potter@amd.com * constructor. 221911910SBrandon.Potter@amd.com */ 222011910SBrandon.Potter@amd.com ProcessParams *pp = new ProcessParams(); 222111910SBrandon.Potter@amd.com pp->executable = path; 222211910SBrandon.Potter@amd.com Addr argv_mem_loc = p->getSyscallArg(tc, index); 222311910SBrandon.Potter@amd.com read_in(pp->cmd, mem_proxy, argv_mem_loc); 222411910SBrandon.Potter@amd.com Addr envp_mem_loc = p->getSyscallArg(tc, index); 222511910SBrandon.Potter@amd.com read_in(pp->env, mem_proxy, envp_mem_loc); 222611910SBrandon.Potter@amd.com pp->uid = p->uid(); 222711910SBrandon.Potter@amd.com pp->egid = p->egid(); 222811910SBrandon.Potter@amd.com pp->euid = p->euid(); 222911910SBrandon.Potter@amd.com pp->gid = p->gid(); 223011910SBrandon.Potter@amd.com pp->ppid = p->ppid(); 223111910SBrandon.Potter@amd.com pp->pid = p->pid(); 223211910SBrandon.Potter@amd.com pp->input.assign("cin"); 223311910SBrandon.Potter@amd.com pp->output.assign("cout"); 223411910SBrandon.Potter@amd.com pp->errout.assign("cerr"); 223511910SBrandon.Potter@amd.com pp->cwd.assign(p->tgtCwd); 223611910SBrandon.Potter@amd.com pp->system = p->system; 223711910SBrandon.Potter@amd.com /** 223811910SBrandon.Potter@amd.com * Prevent process object creation with identical PIDs (which will trip 223911910SBrandon.Potter@amd.com * a fatal check in Process constructor). The execve call is supposed to 224011910SBrandon.Potter@amd.com * take over the currently executing process' identity but replace 224111910SBrandon.Potter@amd.com * whatever it is doing with a new process image. Instead of hijacking 224211910SBrandon.Potter@amd.com * the process object in the simulator, we create a new process object 224311910SBrandon.Potter@amd.com * and bind to the previous process' thread below (hijacking the thread). 224411910SBrandon.Potter@amd.com */ 224511910SBrandon.Potter@amd.com p->system->PIDs.erase(p->pid()); 224611910SBrandon.Potter@amd.com Process *new_p = pp->create(); 224711910SBrandon.Potter@amd.com delete pp; 224811910SBrandon.Potter@amd.com 224911910SBrandon.Potter@amd.com /** 225011910SBrandon.Potter@amd.com * Work through the file descriptor array and close any files marked 225113568Sbrandon.potter@amd.com * close-on-exec. 225213568Sbrandon.potter@amd.com */ 225313568Sbrandon.potter@amd.com new_p->fds = p->fds; 225413568Sbrandon.potter@amd.com for (int i = 0; i < new_p->fds->getSize(); i++) { 225513568Sbrandon.potter@amd.com std::shared_ptr<FDEntry> fdep = (*new_p->fds)[i]; 225613568Sbrandon.potter@amd.com if (fdep && fdep->getCOE()) 225713568Sbrandon.potter@amd.com new_p->fds->closeFDEntry(i); 225813568Sbrandon.potter@amd.com } 225913568Sbrandon.potter@amd.com 226013568Sbrandon.potter@amd.com *new_p->sigchld = true; 226113568Sbrandon.potter@amd.com 226213568Sbrandon.potter@amd.com delete p; 226313568Sbrandon.potter@amd.com tc->clearArchRegs(); 226413568Sbrandon.potter@amd.com tc->setProcessPtr(new_p); 226513568Sbrandon.potter@amd.com new_p->assignThreadContext(tc->contextId()); 226613568Sbrandon.potter@amd.com new_p->initState(); 226713568Sbrandon.potter@amd.com tc->activate(); 226813568Sbrandon.potter@amd.com TheISA::PCState pcState = tc->pcState(); 226913568Sbrandon.potter@amd.com tc->setNPC(pcState.instAddr()); 227013568Sbrandon.potter@amd.com 227113568Sbrandon.potter@amd.com desc->setFlags(SyscallDesc::SuppressReturnValue); 227213568Sbrandon.potter@amd.com return 0; 227313568Sbrandon.potter@amd.com} 227413568Sbrandon.potter@amd.com 227513568Sbrandon.potter@amd.com/// Target getrusage() function. 227613568Sbrandon.potter@amd.comtemplate <class OS> 227713568Sbrandon.potter@amd.comSyscallReturn 227813568Sbrandon.potter@amd.comgetrusageFunc(SyscallDesc *desc, int callnum, Process *process, 227913568Sbrandon.potter@amd.com ThreadContext *tc) 228013568Sbrandon.potter@amd.com{ 228113568Sbrandon.potter@amd.com int index = 0; 228213568Sbrandon.potter@amd.com int who = process->getSyscallArg(tc, index); // THREAD, SELF, or CHILDREN 228313568Sbrandon.potter@amd.com TypedBufferArg<typename OS::rusage> rup(process->getSyscallArg(tc, index)); 228413568Sbrandon.potter@amd.com 228513568Sbrandon.potter@amd.com rup->ru_utime.tv_sec = 0; 228613568Sbrandon.potter@amd.com rup->ru_utime.tv_usec = 0; 228713568Sbrandon.potter@amd.com rup->ru_stime.tv_sec = 0; 228813568Sbrandon.potter@amd.com rup->ru_stime.tv_usec = 0; 228913568Sbrandon.potter@amd.com rup->ru_maxrss = 0; 229013568Sbrandon.potter@amd.com rup->ru_ixrss = 0; 229113568Sbrandon.potter@amd.com rup->ru_idrss = 0; 229213568Sbrandon.potter@amd.com rup->ru_isrss = 0; 229313568Sbrandon.potter@amd.com rup->ru_minflt = 0; 229413568Sbrandon.potter@amd.com rup->ru_majflt = 0; 22952553SN/A rup->ru_nswap = 0; 229613570Sbrandon.potter@amd.com rup->ru_inblock = 0; 229713570Sbrandon.potter@amd.com rup->ru_oublock = 0; 229813570Sbrandon.potter@amd.com rup->ru_msgsnd = 0; 229913570Sbrandon.potter@amd.com rup->ru_msgrcv = 0; 230013570Sbrandon.potter@amd.com rup->ru_nsignals = 0; 230113570Sbrandon.potter@amd.com rup->ru_nvcsw = 0; 230213570Sbrandon.potter@amd.com rup->ru_nivcsw = 0; 230313570Sbrandon.potter@amd.com 230413570Sbrandon.potter@amd.com switch (who) { 230513570Sbrandon.potter@amd.com case OS::TGT_RUSAGE_SELF: 230613570Sbrandon.potter@amd.com getElapsedTimeMicro(rup->ru_utime.tv_sec, rup->ru_utime.tv_usec); 230713570Sbrandon.potter@amd.com rup->ru_utime.tv_sec = TheISA::htog(rup->ru_utime.tv_sec); 230813570Sbrandon.potter@amd.com rup->ru_utime.tv_usec = TheISA::htog(rup->ru_utime.tv_usec); 230913570Sbrandon.potter@amd.com break; 231013570Sbrandon.potter@amd.com 231113570Sbrandon.potter@amd.com case OS::TGT_RUSAGE_CHILDREN: 231213570Sbrandon.potter@amd.com // do nothing. We have no child processes, so they take no time. 231313570Sbrandon.potter@amd.com break; 231413570Sbrandon.potter@amd.com 231513570Sbrandon.potter@amd.com default: 231613570Sbrandon.potter@amd.com // don't really handle THREAD or CHILDREN, but just warn and 231713570Sbrandon.potter@amd.com // plow ahead 231813570Sbrandon.potter@amd.com warn("getrusage() only supports RUSAGE_SELF. Parameter %d ignored.", 231913570Sbrandon.potter@amd.com who); 232013570Sbrandon.potter@amd.com } 232113570Sbrandon.potter@amd.com 232213570Sbrandon.potter@amd.com rup.copyOut(tc->getMemProxy()); 232313570Sbrandon.potter@amd.com 232413570Sbrandon.potter@amd.com return 0; 232513570Sbrandon.potter@amd.com} 232613570Sbrandon.potter@amd.com 232713570Sbrandon.potter@amd.com/// Target times() function. 232813570Sbrandon.potter@amd.comtemplate <class OS> 232913570Sbrandon.potter@amd.comSyscallReturn 233013570Sbrandon.potter@amd.comtimesFunc(SyscallDesc *desc, int callnum, Process *process, 233113570Sbrandon.potter@amd.com ThreadContext *tc) 233213570Sbrandon.potter@amd.com{ 233313570Sbrandon.potter@amd.com int index = 0; 233413570Sbrandon.potter@amd.com TypedBufferArg<typename OS::tms> bufp(process->getSyscallArg(tc, index)); 233513570Sbrandon.potter@amd.com 233613570Sbrandon.potter@amd.com // Fill in the time structure (in clocks) 233713570Sbrandon.potter@amd.com int64_t clocks = curTick() * OS::M5_SC_CLK_TCK / SimClock::Int::s; 233813570Sbrandon.potter@amd.com bufp->tms_utime = clocks; 233913570Sbrandon.potter@amd.com bufp->tms_stime = 0; 234013570Sbrandon.potter@amd.com bufp->tms_cutime = 0; 234113570Sbrandon.potter@amd.com bufp->tms_cstime = 0; 234213570Sbrandon.potter@amd.com 234313570Sbrandon.potter@amd.com // Convert to host endianness 234413570Sbrandon.potter@amd.com bufp->tms_utime = TheISA::htog(bufp->tms_utime); 234513570Sbrandon.potter@amd.com 234613570Sbrandon.potter@amd.com // Write back 234713570Sbrandon.potter@amd.com bufp.copyOut(tc->getMemProxy()); 234813570Sbrandon.potter@amd.com 234913570Sbrandon.potter@amd.com // Return clock ticks since system boot 235013570Sbrandon.potter@amd.com return clocks; 235113570Sbrandon.potter@amd.com} 235213570Sbrandon.potter@amd.com 235313570Sbrandon.potter@amd.com/// Target time() function. 235413570Sbrandon.potter@amd.comtemplate <class OS> 235513570Sbrandon.potter@amd.comSyscallReturn 235613570Sbrandon.potter@amd.comtimeFunc(SyscallDesc *desc, int callnum, Process *process, ThreadContext *tc) 235713570Sbrandon.potter@amd.com{ 235813570Sbrandon.potter@amd.com typename OS::time_t sec, usec; 235913570Sbrandon.potter@amd.com getElapsedTimeMicro(sec, usec); 236013570Sbrandon.potter@amd.com sec += seconds_since_epoch; 236113570Sbrandon.potter@amd.com 236213570Sbrandon.potter@amd.com int index = 0; 236313570Sbrandon.potter@amd.com Addr taddr = (Addr)process->getSyscallArg(tc, index); 236413570Sbrandon.potter@amd.com if (taddr != 0) { 236513570Sbrandon.potter@amd.com typename OS::time_t t = sec; 236613570Sbrandon.potter@amd.com t = TheISA::htog(t); 236713570Sbrandon.potter@amd.com SETranslatingPortProxy &p = tc->getMemProxy(); 236813570Sbrandon.potter@amd.com p.writeBlob(taddr, (uint8_t*)&t, (int)sizeof(typename OS::time_t)); 236913570Sbrandon.potter@amd.com } 237013570Sbrandon.potter@amd.com return sec; 237113570Sbrandon.potter@amd.com} 237213570Sbrandon.potter@amd.com 237313570Sbrandon.potter@amd.comtemplate <class OS> 237413570Sbrandon.potter@amd.comSyscallReturn 237513570Sbrandon.potter@amd.comtgkillFunc(SyscallDesc *desc, int num, Process *process, ThreadContext *tc) 237613570Sbrandon.potter@amd.com{ 237713570Sbrandon.potter@amd.com int index = 0; 237813570Sbrandon.potter@amd.com int tgid = process->getSyscallArg(tc, index); 237913570Sbrandon.potter@amd.com int tid = process->getSyscallArg(tc, index); 238013570Sbrandon.potter@amd.com int sig = process->getSyscallArg(tc, index); 238113570Sbrandon.potter@amd.com 238213570Sbrandon.potter@amd.com /** 238313570Sbrandon.potter@amd.com * This system call is intended to allow killing a specific thread 238413570Sbrandon.potter@amd.com * within an arbitrary thread group if sanctioned with permission checks. 238513570Sbrandon.potter@amd.com * It's usually true that threads share the termination signal as pointed 238613570Sbrandon.potter@amd.com * out by the pthread_kill man page and this seems to be the intended 238713570Sbrandon.potter@amd.com * usage. Due to this being an emulated environment, assume the following: 238813570Sbrandon.potter@amd.com * Threads are allowed to call tgkill because the EUID for all threads 238913570Sbrandon.potter@amd.com * should be the same. There is no signal handling mechanism for kernel 239013570Sbrandon.potter@amd.com * registration of signal handlers since signals are poorly supported in 239113570Sbrandon.potter@amd.com * emulation mode. Since signal handlers cannot be registered, all 239213570Sbrandon.potter@amd.com * threads within in a thread group must share the termination signal. 239313570Sbrandon.potter@amd.com * We never exhaust PIDs so there's no chance of finding the wrong one 239413570Sbrandon.potter@amd.com * due to PID rollover. 239513570Sbrandon.potter@amd.com */ 239613570Sbrandon.potter@amd.com 239713570Sbrandon.potter@amd.com System *sys = tc->getSystemPtr(); 239813570Sbrandon.potter@amd.com Process *tgt_proc = nullptr; 239913570Sbrandon.potter@amd.com for (int i = 0; i < sys->numContexts(); i++) { 240013570Sbrandon.potter@amd.com Process *temp = sys->threadContexts[i]->getProcessPtr(); 240113570Sbrandon.potter@amd.com if (temp->pid() == tid) { 240213570Sbrandon.potter@amd.com tgt_proc = temp; 240313570Sbrandon.potter@amd.com break; 240413570Sbrandon.potter@amd.com } 240513570Sbrandon.potter@amd.com } 240613570Sbrandon.potter@amd.com 240713570Sbrandon.potter@amd.com if (sig != 0 || sig != OS::TGT_SIGABRT) 240813570Sbrandon.potter@amd.com return -EINVAL; 240913570Sbrandon.potter@amd.com 241013570Sbrandon.potter@amd.com if (tgt_proc == nullptr) 241113570Sbrandon.potter@amd.com return -ESRCH; 241213570Sbrandon.potter@amd.com 241313570Sbrandon.potter@amd.com if (tgid != -1 && tgt_proc->tgid() != tgid) 241413570Sbrandon.potter@amd.com return -ESRCH; 241513570Sbrandon.potter@amd.com 241613570Sbrandon.potter@amd.com if (sig == OS::TGT_SIGABRT) 241713570Sbrandon.potter@amd.com exitGroupFunc(desc, 252, process, tc); 241813570Sbrandon.potter@amd.com 241913570Sbrandon.potter@amd.com return 0; 242013570Sbrandon.potter@amd.com} 242113570Sbrandon.potter@amd.com 242213570Sbrandon.potter@amd.comtemplate <class OS> 242313570Sbrandon.potter@amd.comSyscallReturn 242413570Sbrandon.potter@amd.comsocketFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 242513570Sbrandon.potter@amd.com{ 242613570Sbrandon.potter@amd.com int index = 0; 242713570Sbrandon.potter@amd.com int domain = p->getSyscallArg(tc, index); 242813570Sbrandon.potter@amd.com int type = p->getSyscallArg(tc, index); 242913570Sbrandon.potter@amd.com int prot = p->getSyscallArg(tc, index); 243013570Sbrandon.potter@amd.com 243113570Sbrandon.potter@amd.com int sim_fd = socket(domain, type, prot); 243213570Sbrandon.potter@amd.com if (sim_fd == -1) 243313570Sbrandon.potter@amd.com return -errno; 243413570Sbrandon.potter@amd.com 243513570Sbrandon.potter@amd.com auto sfdp = std::make_shared<SocketFDEntry>(sim_fd, domain, type, prot); 243613570Sbrandon.potter@amd.com int tgt_fd = p->fds->allocFD(sfdp); 243713570Sbrandon.potter@amd.com 243813570Sbrandon.potter@amd.com return tgt_fd; 243913570Sbrandon.potter@amd.com} 244013570Sbrandon.potter@amd.com 244113570Sbrandon.potter@amd.comtemplate <class OS> 244213570Sbrandon.potter@amd.comSyscallReturn 244313570Sbrandon.potter@amd.comsocketpairFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 244413570Sbrandon.potter@amd.com{ 244513570Sbrandon.potter@amd.com int index = 0; 244613570Sbrandon.potter@amd.com int domain = p->getSyscallArg(tc, index); 244713570Sbrandon.potter@amd.com int type = p->getSyscallArg(tc, index); 244813570Sbrandon.potter@amd.com int prot = p->getSyscallArg(tc, index); 244913570Sbrandon.potter@amd.com Addr svPtr = p->getSyscallArg(tc, index); 245013570Sbrandon.potter@amd.com 245113570Sbrandon.potter@amd.com BufferArg svBuf((Addr)svPtr, 2 * sizeof(int)); 245213570Sbrandon.potter@amd.com int status = socketpair(domain, type, prot, (int *)svBuf.bufferPtr()); 245313570Sbrandon.potter@amd.com if (status == -1) 245413570Sbrandon.potter@amd.com return -errno; 245513570Sbrandon.potter@amd.com 245613570Sbrandon.potter@amd.com int *fds = (int *)svBuf.bufferPtr(); 245713570Sbrandon.potter@amd.com 245813570Sbrandon.potter@amd.com auto sfdp1 = std::make_shared<SocketFDEntry>(fds[0], domain, type, prot); 245913570Sbrandon.potter@amd.com fds[0] = p->fds->allocFD(sfdp1); 246013570Sbrandon.potter@amd.com auto sfdp2 = std::make_shared<SocketFDEntry>(fds[1], domain, type, prot); 246113570Sbrandon.potter@amd.com fds[1] = p->fds->allocFD(sfdp2); 246213570Sbrandon.potter@amd.com svBuf.copyOut(tc->getMemProxy()); 246313570Sbrandon.potter@amd.com 246413570Sbrandon.potter@amd.com return status; 246513570Sbrandon.potter@amd.com} 246613570Sbrandon.potter@amd.com 246713570Sbrandon.potter@amd.comtemplate <class OS> 246813570Sbrandon.potter@amd.comSyscallReturn 246913570Sbrandon.potter@amd.comselectFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 247013570Sbrandon.potter@amd.com{ 247113570Sbrandon.potter@amd.com int retval; 247213570Sbrandon.potter@amd.com 247313570Sbrandon.potter@amd.com int index = 0; 247413570Sbrandon.potter@amd.com int nfds_t = p->getSyscallArg(tc, index); 247513570Sbrandon.potter@amd.com Addr fds_read_ptr = p->getSyscallArg(tc, index); 247613570Sbrandon.potter@amd.com Addr fds_writ_ptr = p->getSyscallArg(tc, index); 247713570Sbrandon.potter@amd.com Addr fds_excp_ptr = p->getSyscallArg(tc, index); 247813570Sbrandon.potter@amd.com Addr time_val_ptr = p->getSyscallArg(tc, index); 247913570Sbrandon.potter@amd.com 248013570Sbrandon.potter@amd.com TypedBufferArg<typename OS::fd_set> rd_t(fds_read_ptr); 248113570Sbrandon.potter@amd.com TypedBufferArg<typename OS::fd_set> wr_t(fds_writ_ptr); 248213570Sbrandon.potter@amd.com TypedBufferArg<typename OS::fd_set> ex_t(fds_excp_ptr); 248313570Sbrandon.potter@amd.com TypedBufferArg<typename OS::timeval> tp(time_val_ptr); 248413570Sbrandon.potter@amd.com 248513570Sbrandon.potter@amd.com /** 248613570Sbrandon.potter@amd.com * Host fields. Notice that these use the definitions from the system 248713570Sbrandon.potter@amd.com * headers instead of the gem5 headers and libraries. If the host and 248813570Sbrandon.potter@amd.com * target have different header file definitions, this will not work. 248913570Sbrandon.potter@amd.com */ 249013570Sbrandon.potter@amd.com fd_set rd_h; 249113570Sbrandon.potter@amd.com FD_ZERO(&rd_h); 249213570Sbrandon.potter@amd.com fd_set wr_h; 249313570Sbrandon.potter@amd.com FD_ZERO(&wr_h); 249413570Sbrandon.potter@amd.com fd_set ex_h; 249513570Sbrandon.potter@amd.com FD_ZERO(&ex_h); 249613570Sbrandon.potter@amd.com 249713570Sbrandon.potter@amd.com /** 249813570Sbrandon.potter@amd.com * Copy in the fd_set from the target. 249913570Sbrandon.potter@amd.com */ 250013570Sbrandon.potter@amd.com if (fds_read_ptr) 250113570Sbrandon.potter@amd.com rd_t.copyIn(tc->getMemProxy()); 250213570Sbrandon.potter@amd.com if (fds_writ_ptr) 250313570Sbrandon.potter@amd.com wr_t.copyIn(tc->getMemProxy()); 250413570Sbrandon.potter@amd.com if (fds_excp_ptr) 250513570Sbrandon.potter@amd.com ex_t.copyIn(tc->getMemProxy()); 250613570Sbrandon.potter@amd.com 250713570Sbrandon.potter@amd.com /** 250813570Sbrandon.potter@amd.com * We need to translate the target file descriptor set into a host file 250913570Sbrandon.potter@amd.com * descriptor set. This involves both our internal process fd array 251013570Sbrandon.potter@amd.com * and the fd_set defined in Linux header files. The nfds field also 251113570Sbrandon.potter@amd.com * needs to be updated as it will be only target specific after 251213570Sbrandon.potter@amd.com * retrieving it from the target; the nfds value is expected to be the 251313570Sbrandon.potter@amd.com * highest file descriptor that needs to be checked, so we need to extend 251413570Sbrandon.potter@amd.com * it out for nfds_h when we do the update. 251513570Sbrandon.potter@amd.com */ 251613570Sbrandon.potter@amd.com int nfds_h = 0; 251713570Sbrandon.potter@amd.com std::map<int, int> trans_map; 251813570Sbrandon.potter@amd.com auto try_add_host_set = [&](fd_set *tgt_set_entry, 251913570Sbrandon.potter@amd.com fd_set *hst_set_entry, 252013570Sbrandon.potter@amd.com int iter) -> bool 252113570Sbrandon.potter@amd.com { 252213570Sbrandon.potter@amd.com /** 252313570Sbrandon.potter@amd.com * By this point, we know that we are looking at a valid file 252413570Sbrandon.potter@amd.com * descriptor set on the target. We need to check if the target file 252513570Sbrandon.potter@amd.com * descriptor value passed in as iter is part of the set. 252613570Sbrandon.potter@amd.com */ 252713570Sbrandon.potter@amd.com if (FD_ISSET(iter, tgt_set_entry)) { 252813570Sbrandon.potter@amd.com /** 252913570Sbrandon.potter@amd.com * We know that the target file descriptor belongs to the set, 253013570Sbrandon.potter@amd.com * but we do not yet know if the file descriptor is valid or 253113570Sbrandon.potter@amd.com * that we have a host mapping. Check that now. 253213570Sbrandon.potter@amd.com */ 253313570Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[iter]); 253413570Sbrandon.potter@amd.com if (!hbfdp) 253513570Sbrandon.potter@amd.com return true; 253613570Sbrandon.potter@amd.com auto sim_fd = hbfdp->getSimFD(); 253713570Sbrandon.potter@amd.com 253813570Sbrandon.potter@amd.com /** 253913570Sbrandon.potter@amd.com * Add the sim_fd to tgt_fd translation into trans_map for use 254013570Sbrandon.potter@amd.com * later when we need to zero the target fd_set structures and 254113570Sbrandon.potter@amd.com * then update them with hits returned from the host select call. 254213570Sbrandon.potter@amd.com */ 254313570Sbrandon.potter@amd.com trans_map[sim_fd] = iter; 254413570Sbrandon.potter@amd.com 254513570Sbrandon.potter@amd.com /** 254613570Sbrandon.potter@amd.com * We know that the host file descriptor exists so now we check 254713570Sbrandon.potter@amd.com * if we need to update the max count for nfds_h before passing 254813570Sbrandon.potter@amd.com * the duplicated structure into the host. 254913570Sbrandon.potter@amd.com */ 255013570Sbrandon.potter@amd.com nfds_h = std::max(nfds_h - 1, sim_fd + 1); 255113570Sbrandon.potter@amd.com 255213570Sbrandon.potter@amd.com /** 255313570Sbrandon.potter@amd.com * Add the host file descriptor to the set that we are going to 255413570Sbrandon.potter@amd.com * pass into the host. 255513570Sbrandon.potter@amd.com */ 255613570Sbrandon.potter@amd.com FD_SET(sim_fd, hst_set_entry); 255713570Sbrandon.potter@amd.com } 255813570Sbrandon.potter@amd.com return false; 255913570Sbrandon.potter@amd.com }; 256013570Sbrandon.potter@amd.com 256113570Sbrandon.potter@amd.com for (int i = 0; i < nfds_t; i++) { 256213570Sbrandon.potter@amd.com if (fds_read_ptr) { 256313570Sbrandon.potter@amd.com bool ebadf = try_add_host_set((fd_set*)&*rd_t, &rd_h, i); 256413570Sbrandon.potter@amd.com if (ebadf) return -EBADF; 256513570Sbrandon.potter@amd.com } 256613570Sbrandon.potter@amd.com if (fds_writ_ptr) { 256713570Sbrandon.potter@amd.com bool ebadf = try_add_host_set((fd_set*)&*wr_t, &wr_h, i); 256813570Sbrandon.potter@amd.com if (ebadf) return -EBADF; 256913570Sbrandon.potter@amd.com } 257013570Sbrandon.potter@amd.com if (fds_excp_ptr) { 257113570Sbrandon.potter@amd.com bool ebadf = try_add_host_set((fd_set*)&*ex_t, &ex_h, i); 257213570Sbrandon.potter@amd.com if (ebadf) return -EBADF; 257313570Sbrandon.potter@amd.com } 257413570Sbrandon.potter@amd.com } 257513570Sbrandon.potter@amd.com 257613570Sbrandon.potter@amd.com if (time_val_ptr) { 257713570Sbrandon.potter@amd.com /** 257813570Sbrandon.potter@amd.com * It might be possible to decrement the timeval based on some 257913570Sbrandon.potter@amd.com * derivation of wall clock determined from elapsed simulator ticks 258013570Sbrandon.potter@amd.com * but that seems like overkill. Rather, we just set the timeval with 258113570Sbrandon.potter@amd.com * zero timeout. (There is no reason to block during the simulation 258213570Sbrandon.potter@amd.com * as it only decreases simulator performance.) 258313570Sbrandon.potter@amd.com */ 258413570Sbrandon.potter@amd.com tp->tv_sec = 0; 258513570Sbrandon.potter@amd.com tp->tv_usec = 0; 258613570Sbrandon.potter@amd.com 258713570Sbrandon.potter@amd.com retval = select(nfds_h, 258813570Sbrandon.potter@amd.com fds_read_ptr ? &rd_h : nullptr, 258913570Sbrandon.potter@amd.com fds_writ_ptr ? &wr_h : nullptr, 259013570Sbrandon.potter@amd.com fds_excp_ptr ? &ex_h : nullptr, 259113570Sbrandon.potter@amd.com (timeval*)&*tp); 259213570Sbrandon.potter@amd.com } else { 259313570Sbrandon.potter@amd.com /** 259413570Sbrandon.potter@amd.com * If the timeval pointer is null, setup a new timeval structure to 259513570Sbrandon.potter@amd.com * pass into the host select call. Unfortunately, we will need to 259613570Sbrandon.potter@amd.com * manually check the return value and throw a retry fault if the 259713570Sbrandon.potter@amd.com * return value is zero. Allowing the system call to block will 259813570Sbrandon.potter@amd.com * likely deadlock the event queue. 259913570Sbrandon.potter@amd.com */ 260013570Sbrandon.potter@amd.com struct timeval tv = { 0, 0 }; 260113570Sbrandon.potter@amd.com 260213570Sbrandon.potter@amd.com retval = select(nfds_h, 260313570Sbrandon.potter@amd.com fds_read_ptr ? &rd_h : nullptr, 260413570Sbrandon.potter@amd.com fds_writ_ptr ? &wr_h : nullptr, 260513570Sbrandon.potter@amd.com fds_excp_ptr ? &ex_h : nullptr, 260613570Sbrandon.potter@amd.com &tv); 260713570Sbrandon.potter@amd.com 260813570Sbrandon.potter@amd.com if (retval == 0) { 260913570Sbrandon.potter@amd.com /** 261013570Sbrandon.potter@amd.com * If blocking indefinitely, check the signal list to see if a 261113570Sbrandon.potter@amd.com * signal would break the poll out of the retry cycle and try to 261213570Sbrandon.potter@amd.com * return the signal interrupt instead. 261313570Sbrandon.potter@amd.com */ 261413570Sbrandon.potter@amd.com for (auto sig : tc->getSystemPtr()->signalList) 261513570Sbrandon.potter@amd.com if (sig.receiver == p) 261613570Sbrandon.potter@amd.com return -EINTR; 261713570Sbrandon.potter@amd.com return SyscallReturn::retry(); 261813570Sbrandon.potter@amd.com } 261913570Sbrandon.potter@amd.com } 262013570Sbrandon.potter@amd.com 262113570Sbrandon.potter@amd.com if (retval == -1) 262213570Sbrandon.potter@amd.com return -errno; 262313570Sbrandon.potter@amd.com 262413570Sbrandon.potter@amd.com FD_ZERO((fd_set*)&*rd_t); 262513570Sbrandon.potter@amd.com FD_ZERO((fd_set*)&*wr_t); 262613570Sbrandon.potter@amd.com FD_ZERO((fd_set*)&*ex_t); 262713570Sbrandon.potter@amd.com 262813570Sbrandon.potter@amd.com /** 262913570Sbrandon.potter@amd.com * We need to translate the host file descriptor set into a target file 263013570Sbrandon.potter@amd.com * descriptor set. This involves both our internal process fd array 263113570Sbrandon.potter@amd.com * and the fd_set defined in header files. 263213570Sbrandon.potter@amd.com */ 263313570Sbrandon.potter@amd.com for (int i = 0; i < nfds_h; i++) { 263413570Sbrandon.potter@amd.com if (fds_read_ptr) { 263513570Sbrandon.potter@amd.com if (FD_ISSET(i, &rd_h)) 263613570Sbrandon.potter@amd.com FD_SET(trans_map[i], (fd_set*)&*rd_t); 263713570Sbrandon.potter@amd.com } 263813570Sbrandon.potter@amd.com 263913570Sbrandon.potter@amd.com if (fds_writ_ptr) { 264013570Sbrandon.potter@amd.com if (FD_ISSET(i, &wr_h)) 264113570Sbrandon.potter@amd.com FD_SET(trans_map[i], (fd_set*)&*wr_t); 264213570Sbrandon.potter@amd.com } 264313570Sbrandon.potter@amd.com 264413570Sbrandon.potter@amd.com if (fds_excp_ptr) { 264513570Sbrandon.potter@amd.com if (FD_ISSET(i, &ex_h)) 264613570Sbrandon.potter@amd.com FD_SET(trans_map[i], (fd_set*)&*ex_t); 264713570Sbrandon.potter@amd.com } 264813570Sbrandon.potter@amd.com } 264913570Sbrandon.potter@amd.com 265013570Sbrandon.potter@amd.com if (fds_read_ptr) 265113570Sbrandon.potter@amd.com rd_t.copyOut(tc->getMemProxy()); 265213570Sbrandon.potter@amd.com if (fds_writ_ptr) 265313570Sbrandon.potter@amd.com wr_t.copyOut(tc->getMemProxy()); 265413570Sbrandon.potter@amd.com if (fds_excp_ptr) 265513570Sbrandon.potter@amd.com ex_t.copyOut(tc->getMemProxy()); 265613570Sbrandon.potter@amd.com if (time_val_ptr) 265713570Sbrandon.potter@amd.com tp.copyOut(tc->getMemProxy()); 265813570Sbrandon.potter@amd.com 265913570Sbrandon.potter@amd.com return retval; 266013570Sbrandon.potter@amd.com} 266113570Sbrandon.potter@amd.com 266213570Sbrandon.potter@amd.comtemplate <class OS> 266313570Sbrandon.potter@amd.comSyscallReturn 266413570Sbrandon.potter@amd.comreadFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 266513570Sbrandon.potter@amd.com{ 266613570Sbrandon.potter@amd.com int index = 0; 266713570Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 266813570Sbrandon.potter@amd.com Addr buf_ptr = p->getSyscallArg(tc, index); 266913570Sbrandon.potter@amd.com int nbytes = p->getSyscallArg(tc, index); 267013570Sbrandon.potter@amd.com 267113570Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 267213570Sbrandon.potter@amd.com if (!hbfdp) 267313570Sbrandon.potter@amd.com return -EBADF; 267413570Sbrandon.potter@amd.com int sim_fd = hbfdp->getSimFD(); 267513570Sbrandon.potter@amd.com 267613570Sbrandon.potter@amd.com struct pollfd pfd; 267713570Sbrandon.potter@amd.com pfd.fd = sim_fd; 267813570Sbrandon.potter@amd.com pfd.events = POLLIN | POLLPRI; 267913570Sbrandon.potter@amd.com if ((poll(&pfd, 1, 0) == 0) 268013570Sbrandon.potter@amd.com && !(hbfdp->getFlags() & OS::TGT_O_NONBLOCK)) 268113570Sbrandon.potter@amd.com return SyscallReturn::retry(); 268213570Sbrandon.potter@amd.com 268313570Sbrandon.potter@amd.com BufferArg buf_arg(buf_ptr, nbytes); 268413570Sbrandon.potter@amd.com int bytes_read = read(sim_fd, buf_arg.bufferPtr(), nbytes); 268513570Sbrandon.potter@amd.com 268613570Sbrandon.potter@amd.com if (bytes_read > 0) 268713570Sbrandon.potter@amd.com buf_arg.copyOut(tc->getMemProxy()); 268813570Sbrandon.potter@amd.com 268913570Sbrandon.potter@amd.com return (bytes_read == -1) ? -errno : bytes_read; 269013570Sbrandon.potter@amd.com} 269113570Sbrandon.potter@amd.com 269213570Sbrandon.potter@amd.comtemplate <class OS> 26931354SN/ASyscallReturn 2694writeFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 2695{ 2696 int index = 0; 2697 int tgt_fd = p->getSyscallArg(tc, index); 2698 Addr buf_ptr = p->getSyscallArg(tc, index); 2699 int nbytes = p->getSyscallArg(tc, index); 2700 2701 auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 2702 if (!hbfdp) 2703 return -EBADF; 2704 int sim_fd = hbfdp->getSimFD(); 2705 2706 BufferArg buf_arg(buf_ptr, nbytes); 2707 buf_arg.copyIn(tc->getMemProxy()); 2708 2709 struct pollfd pfd; 2710 pfd.fd = sim_fd; 2711 pfd.events = POLLOUT; 2712 2713 /** 2714 * We don't want to poll on /dev/random. The kernel will not enable the 2715 * file descriptor for writing unless the entropy in the system falls 2716 * below write_wakeup_threshold. This is not guaranteed to happen 2717 * depending on host settings. 2718 */ 2719 auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(hbfdp); 2720 if (ffdp && (ffdp->getFileName() != "/dev/random")) { 2721 if (!poll(&pfd, 1, 0) && !(ffdp->getFlags() & OS::TGT_O_NONBLOCK)) 2722 return SyscallReturn::retry(); 2723 } 2724 2725 int bytes_written = write(sim_fd, buf_arg.bufferPtr(), nbytes); 2726 2727 if (bytes_written != -1) 2728 fsync(sim_fd); 2729 2730 return (bytes_written == -1) ? -errno : bytes_written; 2731} 2732 2733template <class OS> 2734SyscallReturn 2735wait4Func(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 2736{ 2737 int index = 0; 2738 pid_t pid = p->getSyscallArg(tc, index); 2739 Addr statPtr = p->getSyscallArg(tc, index); 2740 int options = p->getSyscallArg(tc, index); 2741 Addr rusagePtr = p->getSyscallArg(tc, index); 2742 2743 if (rusagePtr) 2744 DPRINTFR(SyscallVerbose, 2745 "%d: %s: syscall wait4: rusage pointer provided however " 2746 "functionality not supported. Ignoring rusage pointer.\n", 2747 curTick(), tc->getCpuPtr()->name()); 2748 2749 /** 2750 * Currently, wait4 is only implemented so that it will wait for children 2751 * exit conditions which are denoted by a SIGCHLD signals posted into the 2752 * system signal list. We return no additional information via any of the 2753 * parameters supplied to wait4. If nothing is found in the system signal 2754 * list, we will wait indefinitely for SIGCHLD to post by retrying the 2755 * call. 2756 */ 2757 System *sysh = tc->getSystemPtr(); 2758 std::list<BasicSignal>::iterator iter; 2759 for (iter=sysh->signalList.begin(); iter!=sysh->signalList.end(); iter++) { 2760 if (iter->receiver == p) { 2761 if (pid < -1) { 2762 if ((iter->sender->pgid() == -pid) 2763 && (iter->signalValue == OS::TGT_SIGCHLD)) 2764 goto success; 2765 } else if (pid == -1) { 2766 if (iter->signalValue == OS::TGT_SIGCHLD) 2767 goto success; 2768 } else if (pid == 0) { 2769 if ((iter->sender->pgid() == p->pgid()) 2770 && (iter->signalValue == OS::TGT_SIGCHLD)) 2771 goto success; 2772 } else { 2773 if ((iter->sender->pid() == pid) 2774 && (iter->signalValue == OS::TGT_SIGCHLD)) 2775 goto success; 2776 } 2777 } 2778 } 2779 2780 return (options & OS::TGT_WNOHANG) ? 0 : SyscallReturn::retry(); 2781 2782success: 2783 // Set status to EXITED for WIFEXITED evaluations. 2784 const int EXITED = 0; 2785 BufferArg statusBuf(statPtr, sizeof(int)); 2786 *(int *)statusBuf.bufferPtr() = EXITED; 2787 statusBuf.copyOut(tc->getMemProxy()); 2788 2789 // Return the child PID. 2790 pid_t retval = iter->sender->pid(); 2791 sysh->signalList.erase(iter); 2792 return retval; 2793} 2794 2795template <class OS> 2796SyscallReturn 2797acceptFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 2798{ 2799 struct sockaddr sa; 2800 socklen_t addrLen; 2801 int host_fd; 2802 int index = 0; 2803 int tgt_fd = p->getSyscallArg(tc, index); 2804 Addr addrPtr = p->getSyscallArg(tc, index); 2805 Addr lenPtr = p->getSyscallArg(tc, index); 2806 2807 BufferArg *lenBufPtr = nullptr; 2808 BufferArg *addrBufPtr = nullptr; 2809 2810 auto sfdp = std::dynamic_pointer_cast<SocketFDEntry>((*p->fds)[tgt_fd]); 2811 if (!sfdp) 2812 return -EBADF; 2813 int sim_fd = sfdp->getSimFD(); 2814 2815 /** 2816 * We poll the socket file descriptor first to guarantee that we do not 2817 * block on our accept call. The socket can be opened without the 2818 * non-blocking flag (it blocks). This will cause deadlocks between 2819 * communicating processes. 2820 */ 2821 struct pollfd pfd; 2822 pfd.fd = sim_fd; 2823 pfd.events = POLLIN | POLLPRI; 2824 if ((poll(&pfd, 1, 0) == 0) 2825 && !(sfdp->getFlags() & OS::TGT_O_NONBLOCK)) 2826 return SyscallReturn::retry(); 2827 2828 if (lenPtr) { 2829 lenBufPtr = new BufferArg(lenPtr, sizeof(socklen_t)); 2830 lenBufPtr->copyIn(tc->getMemProxy()); 2831 memcpy(&addrLen, (socklen_t *)lenBufPtr->bufferPtr(), 2832 sizeof(socklen_t)); 2833 } 2834 2835 if (addrPtr) { 2836 addrBufPtr = new BufferArg(addrPtr, sizeof(struct sockaddr)); 2837 addrBufPtr->copyIn(tc->getMemProxy()); 2838 memcpy(&sa, (struct sockaddr *)addrBufPtr->bufferPtr(), 2839 sizeof(struct sockaddr)); 2840 } 2841 2842 host_fd = accept(sim_fd, &sa, &addrLen); 2843 2844 if (host_fd == -1) 2845 return -errno; 2846 2847 if (addrPtr) { 2848 memcpy(addrBufPtr->bufferPtr(), &sa, sizeof(sa)); 2849 addrBufPtr->copyOut(tc->getMemProxy()); 2850 delete(addrBufPtr); 2851 } 2852 2853 if (lenPtr) { 2854 *(socklen_t *)lenBufPtr->bufferPtr() = addrLen; 2855 lenBufPtr->copyOut(tc->getMemProxy()); 2856 delete(lenBufPtr); 2857 } 2858 2859 auto afdp = std::make_shared<SocketFDEntry>(host_fd, sfdp->_domain, 2860 sfdp->_type, sfdp->_protocol); 2861 return p->fds->allocFD(afdp); 2862} 2863 2864#endif // __SIM_SYSCALL_EMUL_HH__ 2865