syscall_emul.hh revision 13883
1360SN/A/* 210850SGiacomo.Gabrielli@arm.com * Copyright (c) 2012-2013, 2015 ARM Limited 310796Sbrandon.potter@amd.com * Copyright (c) 2015 Advanced Micro Devices, Inc. 410027SChris.Adeniyi-Jones@arm.com * All rights reserved 510027SChris.Adeniyi-Jones@arm.com * 610027SChris.Adeniyi-Jones@arm.com * The license below extends only to copyright in the software and shall 710027SChris.Adeniyi-Jones@arm.com * not be construed as granting a license to any other intellectual 810027SChris.Adeniyi-Jones@arm.com * property including but not limited to intellectual property relating 910027SChris.Adeniyi-Jones@arm.com * to a hardware implementation of the functionality of the software 1010027SChris.Adeniyi-Jones@arm.com * licensed hereunder. You may use the software subject to the license 1110027SChris.Adeniyi-Jones@arm.com * terms below provided that you ensure that this notice is replicated 1210027SChris.Adeniyi-Jones@arm.com * unmodified and in its entirety in all distributions of the software, 1310027SChris.Adeniyi-Jones@arm.com * modified or unmodified, in source code or in binary form. 1410027SChris.Adeniyi-Jones@arm.com * 151458SN/A * Copyright (c) 2003-2005 The Regents of The University of Michigan 16360SN/A * All rights reserved. 17360SN/A * 18360SN/A * Redistribution and use in source and binary forms, with or without 19360SN/A * modification, are permitted provided that the following conditions are 20360SN/A * met: redistributions of source code must retain the above copyright 21360SN/A * notice, this list of conditions and the following disclaimer; 22360SN/A * redistributions in binary form must reproduce the above copyright 23360SN/A * notice, this list of conditions and the following disclaimer in the 24360SN/A * documentation and/or other materials provided with the distribution; 25360SN/A * neither the name of the copyright holders nor the names of its 26360SN/A * contributors may be used to endorse or promote products derived from 27360SN/A * this software without specific prior written permission. 28360SN/A * 29360SN/A * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 30360SN/A * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 31360SN/A * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 32360SN/A * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 33360SN/A * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 34360SN/A * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 35360SN/A * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 36360SN/A * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 37360SN/A * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 38360SN/A * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 39360SN/A * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 402665Ssaidi@eecs.umich.edu * 412665Ssaidi@eecs.umich.edu * Authors: Steve Reinhardt 422665Ssaidi@eecs.umich.edu * Kevin Lim 43360SN/A */ 44360SN/A 451354SN/A#ifndef __SIM_SYSCALL_EMUL_HH__ 461354SN/A#define __SIM_SYSCALL_EMUL_HH__ 47360SN/A 4812018Sandreas.sandberg@arm.com#if (defined(__APPLE__) || defined(__OpenBSD__) || \ 4912018Sandreas.sandberg@arm.com defined(__FreeBSD__) || defined(__CYGWIN__) || \ 5012018Sandreas.sandberg@arm.com defined(__NetBSD__)) 5112018Sandreas.sandberg@arm.com#define NO_STAT64 1 5212018Sandreas.sandberg@arm.com#else 5312018Sandreas.sandberg@arm.com#define NO_STAT64 0 5412018Sandreas.sandberg@arm.com#endif 552064SN/A 5612018Sandreas.sandberg@arm.com#if (defined(__APPLE__) || defined(__OpenBSD__) || \ 5712018Sandreas.sandberg@arm.com defined(__FreeBSD__) || defined(__NetBSD__)) 5812018Sandreas.sandberg@arm.com#define NO_STATFS 1 5912018Sandreas.sandberg@arm.com#else 6012018Sandreas.sandberg@arm.com#define NO_STATFS 0 6112018Sandreas.sandberg@arm.com#endif 6211799Sbrandon.potter@amd.com 6312018Sandreas.sandberg@arm.com#if (defined(__APPLE__) || defined(__OpenBSD__) || \ 6412018Sandreas.sandberg@arm.com defined(__FreeBSD__) || defined(__NetBSD__)) 6512018Sandreas.sandberg@arm.com#define NO_FALLOCATE 1 6612018Sandreas.sandberg@arm.com#else 6712018Sandreas.sandberg@arm.com#define NO_FALLOCATE 0 6812018Sandreas.sandberg@arm.com#endif 6911799Sbrandon.potter@amd.com 70360SN/A/// 71360SN/A/// @file syscall_emul.hh 72360SN/A/// 73360SN/A/// This file defines objects used to emulate syscalls from the target 74360SN/A/// application on the host machine. 75360SN/A 761809SN/A#ifdef __CYGWIN32__ 7711800Sbrandon.potter@amd.com#include <sys/fcntl.h> 7811392Sbrandon.potter@amd.com 791809SN/A#endif 8011392Sbrandon.potter@amd.com#include <fcntl.h> 8113570Sbrandon.potter@amd.com#include <poll.h> 8211383Sbrandon.potter@amd.com#include <sys/mman.h> 8313568Sbrandon.potter@amd.com#include <sys/socket.h> 843113Sgblack@eecs.umich.edu#include <sys/stat.h> 8511799Sbrandon.potter@amd.com#if (NO_STATFS == 0) 8611759Sbrandon.potter@amd.com#include <sys/statfs.h> 8711812Sbaz21@cam.ac.uk#else 8811812Sbaz21@cam.ac.uk#include <sys/mount.h> 8911799Sbrandon.potter@amd.com#endif 908229Snate@binkert.org#include <sys/time.h> 9113570Sbrandon.potter@amd.com#include <sys/types.h> 928229Snate@binkert.org#include <sys/uio.h> 9311594Santhony.gutierrez@amd.com#include <unistd.h> 947075Snate@binkert.org 958229Snate@binkert.org#include <cerrno> 9611856Sbrandon.potter@amd.com#include <memory> 977075Snate@binkert.org#include <string> 98360SN/A 9912461Sgabeblack@google.com#include "arch/generic/tlb.hh" 10011886Sbrandon.potter@amd.com#include "arch/utility.hh" 10111800Sbrandon.potter@amd.com#include "base/intmath.hh" 10211392Sbrandon.potter@amd.com#include "base/loader/object_file.hh" 10312334Sgabeblack@google.com#include "base/logging.hh" 1041354SN/A#include "base/trace.hh" 1056216Snate@binkert.org#include "base/types.hh" 1066658Snate@binkert.org#include "config/the_isa.hh" 1072474SN/A#include "cpu/base.hh" 1082680Sktlim@umich.edu#include "cpu/thread_context.hh" 1098229Snate@binkert.org#include "mem/page_table.hh" 11011886Sbrandon.potter@amd.com#include "params/Process.hh" 11110496Ssteve.reinhardt@amd.com#include "sim/emul_driver.hh" 11211911SBrandon.Potter@amd.com#include "sim/futex_map.hh" 1138229Snate@binkert.org#include "sim/process.hh" 11411794Sbrandon.potter@amd.com#include "sim/syscall_debug_macros.hh" 11511886Sbrandon.potter@amd.com#include "sim/syscall_desc.hh" 11610497Ssteve.reinhardt@amd.com#include "sim/syscall_emul_buf.hh" 11711794Sbrandon.potter@amd.com#include "sim/syscall_return.hh" 118360SN/A 11913629SAndrea.Mondelli@ucf.edu#if defined(__APPLE__) && defined(__MACH__) && !defined(CMSG_ALIGN) 12013629SAndrea.Mondelli@ucf.edu#define CMSG_ALIGN(len) (((len) + sizeof(size_t) - 1) & ~(sizeof(size_t) - 1)) 12113629SAndrea.Mondelli@ucf.edu#endif 12213629SAndrea.Mondelli@ucf.edu 123360SN/A////////////////////////////////////////////////////////////////////// 124360SN/A// 125360SN/A// The following emulation functions are generic enough that they 126360SN/A// don't need to be recompiled for different emulated OS's. They are 127360SN/A// defined in sim/syscall_emul.cc. 128360SN/A// 129360SN/A////////////////////////////////////////////////////////////////////// 130360SN/A 131360SN/A 132378SN/A/// Handler for unimplemented syscalls that we haven't thought about. 1331706SN/ASyscallReturn unimplementedFunc(SyscallDesc *desc, int num, 13411851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 135378SN/A 136378SN/A/// Handler for unimplemented syscalls that we never intend to 137378SN/A/// implement (signal handling, etc.) and should not affect the correct 138378SN/A/// behavior of the program. Print a warning only if the appropriate 139378SN/A/// trace flag is enabled. Return success to the target program. 1401706SN/ASyscallReturn ignoreFunc(SyscallDesc *desc, int num, 14111851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 142360SN/A 14311760Sbrandon.potter@amd.com// Target fallocateFunc() handler. 14411760Sbrandon.potter@amd.comSyscallReturn fallocateFunc(SyscallDesc *desc, int num, 14511851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 14611760Sbrandon.potter@amd.com 1476109Ssanchezd@stanford.edu/// Target exit() handler: terminate current context. 1481706SN/ASyscallReturn exitFunc(SyscallDesc *desc, int num, 14911851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 150378SN/A 1516109Ssanchezd@stanford.edu/// Target exit_group() handler: terminate simulation. (exit all threads) 1526109Ssanchezd@stanford.eduSyscallReturn exitGroupFunc(SyscallDesc *desc, int num, 15311851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 1546109Ssanchezd@stanford.edu 15511886Sbrandon.potter@amd.com/// Target set_tid_address() handler. 15611886Sbrandon.potter@amd.comSyscallReturn setTidAddressFunc(SyscallDesc *desc, int num, 15711886Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 15811886Sbrandon.potter@amd.com 159378SN/A/// Target getpagesize() handler. 1601706SN/ASyscallReturn getpagesizeFunc(SyscallDesc *desc, int num, 16111851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 162378SN/A 1635748SSteve.Reinhardt@amd.com/// Target brk() handler: set brk address. 1645748SSteve.Reinhardt@amd.comSyscallReturn brkFunc(SyscallDesc *desc, int num, 16511851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 166378SN/A 167378SN/A/// Target close() handler. 1681706SN/ASyscallReturn closeFunc(SyscallDesc *desc, int num, 16911851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 170378SN/A 171378SN/A/// Target lseek() handler. 1721706SN/ASyscallReturn lseekFunc(SyscallDesc *desc, int num, 17311851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 174378SN/A 1754118Sgblack@eecs.umich.edu/// Target _llseek() handler. 1764118Sgblack@eecs.umich.eduSyscallReturn _llseekFunc(SyscallDesc *desc, int num, 17711851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 1784118Sgblack@eecs.umich.edu 179378SN/A/// Target munmap() handler. 1801706SN/ASyscallReturn munmapFunc(SyscallDesc *desc, int num, 18111851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 182378SN/A 18313568Sbrandon.potter@amd.com/// Target shutdown() handler. 18413568Sbrandon.potter@amd.comSyscallReturn shutdownFunc(SyscallDesc *desc, int num, 18513568Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 18613568Sbrandon.potter@amd.com 187378SN/A/// Target gethostname() handler. 1881706SN/ASyscallReturn gethostnameFunc(SyscallDesc *desc, int num, 18911851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 190360SN/A 1915513SMichael.Adler@intel.com/// Target getcwd() handler. 1925513SMichael.Adler@intel.comSyscallReturn getcwdFunc(SyscallDesc *desc, int num, 19311851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 1945513SMichael.Adler@intel.com 19510203SAli.Saidi@ARM.com/// Target readlink() handler. 19610203SAli.Saidi@ARM.comSyscallReturn readlinkFunc(SyscallDesc *desc, int num, 19711851Sbrandon.potter@amd.com Process *p, ThreadContext *tc, 19810203SAli.Saidi@ARM.com int index = 0); 1995513SMichael.Adler@intel.comSyscallReturn readlinkFunc(SyscallDesc *desc, int num, 20011851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2015513SMichael.Adler@intel.com 202511SN/A/// Target unlink() handler. 20310633Smichaelupton@gmail.comSyscallReturn unlinkHelper(SyscallDesc *desc, int num, 20411851Sbrandon.potter@amd.com Process *p, ThreadContext *tc, 20510633Smichaelupton@gmail.com int index); 2061706SN/ASyscallReturn unlinkFunc(SyscallDesc *desc, int num, 20711851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 208511SN/A 20912795Smattdsinclair@gmail.com/// Target link() handler 21012795Smattdsinclair@gmail.comSyscallReturn linkFunc(SyscallDesc *desc, int num, Process *p, 21112795Smattdsinclair@gmail.com ThreadContext *tc); 21212795Smattdsinclair@gmail.com 21312796Smattdsinclair@gmail.com/// Target symlink() handler. 21412796Smattdsinclair@gmail.comSyscallReturn symlinkFunc(SyscallDesc *desc, int num, Process *p, 21512796Smattdsinclair@gmail.com ThreadContext *tc); 21612796Smattdsinclair@gmail.com 2175513SMichael.Adler@intel.com/// Target mkdir() handler. 2185513SMichael.Adler@intel.comSyscallReturn mkdirFunc(SyscallDesc *desc, int num, 21911851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2205513SMichael.Adler@intel.com 22113031Sbrandon.potter@amd.com/// Target mknod() handler. 22213031Sbrandon.potter@amd.comSyscallReturn mknodFunc(SyscallDesc *desc, int num, 22313031Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 22413031Sbrandon.potter@amd.com 22513031Sbrandon.potter@amd.com/// Target chdir() handler. 22613031Sbrandon.potter@amd.comSyscallReturn chdirFunc(SyscallDesc *desc, int num, 22713031Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 22813031Sbrandon.potter@amd.com 22913031Sbrandon.potter@amd.com// Target rmdir() handler. 23013031Sbrandon.potter@amd.comSyscallReturn rmdirFunc(SyscallDesc *desc, int num, 23113031Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 23213031Sbrandon.potter@amd.com 233511SN/A/// Target rename() handler. 2341706SN/ASyscallReturn renameFunc(SyscallDesc *desc, int num, 23511851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2361706SN/A 2371706SN/A 2381706SN/A/// Target truncate() handler. 2391706SN/ASyscallReturn truncateFunc(SyscallDesc *desc, int num, 24011851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2411706SN/A 2421706SN/A 2431706SN/A/// Target ftruncate() handler. 2441706SN/ASyscallReturn ftruncateFunc(SyscallDesc *desc, int num, 24511851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2461706SN/A 247511SN/A 2486703Svince@csl.cornell.edu/// Target truncate64() handler. 2496703Svince@csl.cornell.eduSyscallReturn truncate64Func(SyscallDesc *desc, int num, 25011851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2516703Svince@csl.cornell.edu 2526685Stjones1@inf.ed.ac.uk/// Target ftruncate64() handler. 2536685Stjones1@inf.ed.ac.ukSyscallReturn ftruncate64Func(SyscallDesc *desc, int num, 25411851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2556685Stjones1@inf.ed.ac.uk 2566685Stjones1@inf.ed.ac.uk 2575513SMichael.Adler@intel.com/// Target umask() handler. 2585513SMichael.Adler@intel.comSyscallReturn umaskFunc(SyscallDesc *desc, int num, 25911851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2605513SMichael.Adler@intel.com 26111885Sbrandon.potter@amd.com/// Target gettid() handler. 26211885Sbrandon.potter@amd.comSyscallReturn gettidFunc(SyscallDesc *desc, int num, 26311885Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2645513SMichael.Adler@intel.com 2651999SN/A/// Target chown() handler. 2661999SN/ASyscallReturn chownFunc(SyscallDesc *desc, int num, 26711851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2681999SN/A 26911885Sbrandon.potter@amd.com/// Target setpgid() handler. 27011885Sbrandon.potter@amd.comSyscallReturn setpgidFunc(SyscallDesc *desc, int num, 27111885Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2721999SN/A 2731999SN/A/// Target fchown() handler. 2741999SN/ASyscallReturn fchownFunc(SyscallDesc *desc, int num, 27511851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2761999SN/A 2773079Sstever@eecs.umich.edu/// Target dup() handler. 2783079Sstever@eecs.umich.eduSyscallReturn dupFunc(SyscallDesc *desc, int num, 27911851Sbrandon.potter@amd.com Process *process, ThreadContext *tc); 2803079Sstever@eecs.umich.edu 28111908SBrandon.Potter@amd.com/// Target dup2() handler. 28211908SBrandon.Potter@amd.comSyscallReturn dup2Func(SyscallDesc *desc, int num, 28311908SBrandon.Potter@amd.com Process *process, ThreadContext *tc); 28411908SBrandon.Potter@amd.com 28511875Sbrandon.potter@amd.com/// Target fcntl() handler. 2862093SN/ASyscallReturn fcntlFunc(SyscallDesc *desc, int num, 28711851Sbrandon.potter@amd.com Process *process, ThreadContext *tc); 2882093SN/A 2892687Sksewell@umich.edu/// Target fcntl64() handler. 2902687Sksewell@umich.eduSyscallReturn fcntl64Func(SyscallDesc *desc, int num, 29111851Sbrandon.potter@amd.com Process *process, ThreadContext *tc); 2922687Sksewell@umich.edu 2932238SN/A/// Target setuid() handler. 2942238SN/ASyscallReturn setuidFunc(SyscallDesc *desc, int num, 29511851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2962238SN/A 29711908SBrandon.Potter@amd.com/// Target pipe() handler. 29811908SBrandon.Potter@amd.comSyscallReturn pipeFunc(SyscallDesc *desc, int num, 29911908SBrandon.Potter@amd.com Process *p, ThreadContext *tc); 30011908SBrandon.Potter@amd.com 30111908SBrandon.Potter@amd.com/// Internal pipe() handler. 30211908SBrandon.Potter@amd.comSyscallReturn pipeImpl(SyscallDesc *desc, int num, Process *p, 30311908SBrandon.Potter@amd.com ThreadContext *tc, bool pseudoPipe); 30411908SBrandon.Potter@amd.com 3052238SN/A/// Target getpid() handler. 3062238SN/ASyscallReturn getpidFunc(SyscallDesc *desc, int num, 30711851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3082238SN/A 30913571Sbrandon.potter@amd.com// Target getpeername() handler. 31013571Sbrandon.potter@amd.comSyscallReturn getpeernameFunc(SyscallDesc *desc, int num, 31113571Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 31213571Sbrandon.potter@amd.com 31313568Sbrandon.potter@amd.com// Target bind() handler. 31413568Sbrandon.potter@amd.comSyscallReturn bindFunc(SyscallDesc *desc, int num, 31513568Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 31613568Sbrandon.potter@amd.com 31713568Sbrandon.potter@amd.com// Target listen() handler. 31813568Sbrandon.potter@amd.comSyscallReturn listenFunc(SyscallDesc *desc, int num, 31913568Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 32013568Sbrandon.potter@amd.com 32113568Sbrandon.potter@amd.com// Target connect() handler. 32213568Sbrandon.potter@amd.comSyscallReturn connectFunc(SyscallDesc *desc, int num, 32313568Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 32413568Sbrandon.potter@amd.com 32513448Sciro.santilli@arm.com#if defined(SYS_getdents) 32613031Sbrandon.potter@amd.com// Target getdents() handler. 32713031Sbrandon.potter@amd.comSyscallReturn getdentsFunc(SyscallDesc *desc, int num, 32813031Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 32913448Sciro.santilli@arm.com#endif 33013031Sbrandon.potter@amd.com 33113539Sjavier.setoain@arm.com#if defined(SYS_getdents64) 33213539Sjavier.setoain@arm.com// Target getdents() handler. 33313539Sjavier.setoain@arm.comSyscallReturn getdents64Func(SyscallDesc *desc, int num, 33413539Sjavier.setoain@arm.com Process *p, ThreadContext *tc); 33513539Sjavier.setoain@arm.com#endif 33613539Sjavier.setoain@arm.com 33713569Sbrandon.potter@amd.com// Target sendto() handler. 33813569Sbrandon.potter@amd.comSyscallReturn sendtoFunc(SyscallDesc *desc, int num, 33913569Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 34013569Sbrandon.potter@amd.com 34113569Sbrandon.potter@amd.com// Target recvfrom() handler. 34213569Sbrandon.potter@amd.comSyscallReturn recvfromFunc(SyscallDesc *desc, int num, 34313569Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 34413569Sbrandon.potter@amd.com 34513569Sbrandon.potter@amd.com// Target recvmsg() handler. 34613569Sbrandon.potter@amd.comSyscallReturn recvmsgFunc(SyscallDesc *desc, int num, 34713569Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 34813569Sbrandon.potter@amd.com 34913569Sbrandon.potter@amd.com// Target sendmsg() handler. 35013569Sbrandon.potter@amd.comSyscallReturn sendmsgFunc(SyscallDesc *desc, int num, 35113569Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 35213569Sbrandon.potter@amd.com 35313031Sbrandon.potter@amd.com// Target getuid() handler. 3542238SN/ASyscallReturn getuidFunc(SyscallDesc *desc, int num, 35511851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3562238SN/A 3572238SN/A/// Target getgid() handler. 3582238SN/ASyscallReturn getgidFunc(SyscallDesc *desc, int num, 35911851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3602238SN/A 3612238SN/A/// Target getppid() handler. 3622238SN/ASyscallReturn getppidFunc(SyscallDesc *desc, int num, 36311851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3642238SN/A 3652238SN/A/// Target geteuid() handler. 3662238SN/ASyscallReturn geteuidFunc(SyscallDesc *desc, int num, 36711851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3682238SN/A 3692238SN/A/// Target getegid() handler. 3702238SN/ASyscallReturn getegidFunc(SyscallDesc *desc, int num, 37111851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3722238SN/A 3739455Smitch.hayenga+gem5@gmail.com/// Target access() handler 3749455Smitch.hayenga+gem5@gmail.comSyscallReturn accessFunc(SyscallDesc *desc, int num, 37511851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 37610203SAli.Saidi@ARM.comSyscallReturn accessFunc(SyscallDesc *desc, int num, 37711851Sbrandon.potter@amd.com Process *p, ThreadContext *tc, 37811851Sbrandon.potter@amd.com int index); 3799455Smitch.hayenga+gem5@gmail.com 38013571Sbrandon.potter@amd.com// Target getsockopt() handler. 38113571Sbrandon.potter@amd.comSyscallReturn getsockoptFunc(SyscallDesc *desc, int num, 38213571Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 38313571Sbrandon.potter@amd.com 38413571Sbrandon.potter@amd.com// Target setsockopt() handler. 38513571Sbrandon.potter@amd.comSyscallReturn setsockoptFunc(SyscallDesc *desc, int num, 38613571Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 38713571Sbrandon.potter@amd.com 38813571Sbrandon.potter@amd.com// Target getsockname() handler. 38913571Sbrandon.potter@amd.comSyscallReturn getsocknameFunc(SyscallDesc *desc, int num, 39013571Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 39113571Sbrandon.potter@amd.com 3929112Smarc.orr@gmail.com/// Futex system call 39311906SBrandon.Potter@amd.com/// Implemented by Daniel Sanchez 39411906SBrandon.Potter@amd.com/// Used by printf's in multi-threaded apps 3959112Smarc.orr@gmail.comtemplate <class OS> 3969112Smarc.orr@gmail.comSyscallReturn 39711851Sbrandon.potter@amd.comfutexFunc(SyscallDesc *desc, int callnum, Process *process, 3989112Smarc.orr@gmail.com ThreadContext *tc) 3999112Smarc.orr@gmail.com{ 40011911SBrandon.Potter@amd.com using namespace std; 4019112Smarc.orr@gmail.com 40211911SBrandon.Potter@amd.com int index = 0; 40311911SBrandon.Potter@amd.com Addr uaddr = process->getSyscallArg(tc, index); 40411911SBrandon.Potter@amd.com int op = process->getSyscallArg(tc, index); 40511911SBrandon.Potter@amd.com int val = process->getSyscallArg(tc, index); 40613642Sqtt2@cornell.edu int timeout M5_VAR_USED = process->getSyscallArg(tc, index); 40713642Sqtt2@cornell.edu Addr uaddr2 M5_VAR_USED = process->getSyscallArg(tc, index); 40813642Sqtt2@cornell.edu int val3 = process->getSyscallArg(tc, index); 4099112Smarc.orr@gmail.com 41011911SBrandon.Potter@amd.com /* 41111911SBrandon.Potter@amd.com * Unsupported option that does not affect the correctness of the 41211911SBrandon.Potter@amd.com * application. This is a performance optimization utilized by Linux. 41311911SBrandon.Potter@amd.com */ 4149238Slluc.alvarez@bsc.es op &= ~OS::TGT_FUTEX_PRIVATE_FLAG; 41513642Sqtt2@cornell.edu op &= ~OS::TGT_FUTEX_CLOCK_REALTIME_FLAG; 4169112Smarc.orr@gmail.com 41711911SBrandon.Potter@amd.com FutexMap &futex_map = tc->getSystemPtr()->futexMap; 4189112Smarc.orr@gmail.com 41913642Sqtt2@cornell.edu if (OS::TGT_FUTEX_WAIT == op || OS::TGT_FUTEX_WAIT_BITSET == op) { 42011911SBrandon.Potter@amd.com // Ensure futex system call accessed atomically. 42111911SBrandon.Potter@amd.com BufferArg buf(uaddr, sizeof(int)); 42211911SBrandon.Potter@amd.com buf.copyIn(tc->getMemProxy()); 42311911SBrandon.Potter@amd.com int mem_val = *(int*)buf.bufferPtr(); 4249112Smarc.orr@gmail.com 42511911SBrandon.Potter@amd.com /* 42611911SBrandon.Potter@amd.com * The value in memory at uaddr is not equal with the expected val 42711911SBrandon.Potter@amd.com * (a different thread must have changed it before the system call was 42811911SBrandon.Potter@amd.com * invoked). In this case, we need to throw an error. 42911911SBrandon.Potter@amd.com */ 43011911SBrandon.Potter@amd.com if (val != mem_val) 4319112Smarc.orr@gmail.com return -OS::TGT_EWOULDBLOCK; 4329112Smarc.orr@gmail.com 43313642Sqtt2@cornell.edu if (OS::TGT_FUTEX_WAIT) { 43413642Sqtt2@cornell.edu futex_map.suspend(uaddr, process->tgid(), tc); 43513642Sqtt2@cornell.edu } else { 43613642Sqtt2@cornell.edu futex_map.suspend_bitset(uaddr, process->tgid(), tc, val3); 43713642Sqtt2@cornell.edu } 43811911SBrandon.Potter@amd.com 4399112Smarc.orr@gmail.com return 0; 44011911SBrandon.Potter@amd.com } else if (OS::TGT_FUTEX_WAKE == op) { 44111911SBrandon.Potter@amd.com return futex_map.wakeup(uaddr, process->tgid(), val); 44213642Sqtt2@cornell.edu } else if (OS::TGT_FUTEX_WAKE_BITSET == op) { 44313642Sqtt2@cornell.edu return futex_map.wakeup_bitset(uaddr, process->tgid(), val3); 44413650Smw828@cornell.edu } else if (OS::TGT_FUTEX_REQUEUE == op || 44513650Smw828@cornell.edu OS::TGT_FUTEX_CMP_REQUEUE == op) { 44613650Smw828@cornell.edu 44713650Smw828@cornell.edu // Ensure futex system call accessed atomically. 44813650Smw828@cornell.edu BufferArg buf(uaddr, sizeof(int)); 44913650Smw828@cornell.edu buf.copyIn(tc->getMemProxy()); 45013650Smw828@cornell.edu int mem_val = *(int*)buf.bufferPtr(); 45113650Smw828@cornell.edu /* 45213650Smw828@cornell.edu * For CMP_REQUEUE, the whole operation is only started only if 45313650Smw828@cornell.edu * val3 is still the value of the futex pointed to by uaddr. 45413650Smw828@cornell.edu */ 45513650Smw828@cornell.edu if (OS::TGT_FUTEX_CMP_REQUEUE && val3 != mem_val) 45613650Smw828@cornell.edu return -OS::TGT_EWOULDBLOCK; 45713650Smw828@cornell.edu return futex_map.requeue(uaddr, process->tgid(), val, timeout, uaddr2); 45813651Smw828@cornell.edu } else if (OS::TGT_FUTEX_WAKE_OP == op) { 45913651Smw828@cornell.edu /* 46013651Smw828@cornell.edu * The FUTEX_WAKE_OP operation is equivalent to executing the 46113651Smw828@cornell.edu * following code atomically and totally ordered with respect to 46213651Smw828@cornell.edu * other futex operations on any of the two supplied futex words: 46313651Smw828@cornell.edu * 46413651Smw828@cornell.edu * int oldval = *(int *) addr2; 46513651Smw828@cornell.edu * *(int *) addr2 = oldval op oparg; 46613651Smw828@cornell.edu * futex(addr1, FUTEX_WAKE, val, 0, 0, 0); 46713651Smw828@cornell.edu * if (oldval cmp cmparg) 46813651Smw828@cornell.edu * futex(addr2, FUTEX_WAKE, val2, 0, 0, 0); 46913651Smw828@cornell.edu * 47013651Smw828@cornell.edu * (op, oparg, cmp, cmparg are encoded in val3) 47113651Smw828@cornell.edu * 47213651Smw828@cornell.edu * +---+---+-----------+-----------+ 47313651Smw828@cornell.edu * |op |cmp| oparg | cmparg | 47413651Smw828@cornell.edu * +---+---+-----------+-----------+ 47513651Smw828@cornell.edu * 4 4 12 12 <== # of bits 47613651Smw828@cornell.edu * 47713651Smw828@cornell.edu * reference: http://man7.org/linux/man-pages/man2/futex.2.html 47813651Smw828@cornell.edu * 47913651Smw828@cornell.edu */ 48013651Smw828@cornell.edu // get value from simulated-space 48113651Smw828@cornell.edu BufferArg buf(uaddr2, sizeof(int)); 48213651Smw828@cornell.edu buf.copyIn(tc->getMemProxy()); 48313651Smw828@cornell.edu int oldval = *(int*)buf.bufferPtr(); 48413651Smw828@cornell.edu int newval = oldval; 48513651Smw828@cornell.edu // extract op, oparg, cmp, cmparg from val3 48613651Smw828@cornell.edu int wake_cmparg = val3 & 0xfff; 48713651Smw828@cornell.edu int wake_oparg = (val3 & 0xfff000) >> 12; 48813651Smw828@cornell.edu int wake_cmp = (val3 & 0xf000000) >> 24; 48913651Smw828@cornell.edu int wake_op = (val3 & 0xf0000000) >> 28; 49013651Smw828@cornell.edu if ((wake_op & OS::TGT_FUTEX_OP_ARG_SHIFT) >> 3 == 1) 49113651Smw828@cornell.edu wake_oparg = (1 << wake_oparg); 49213651Smw828@cornell.edu wake_op &= ~OS::TGT_FUTEX_OP_ARG_SHIFT; 49313651Smw828@cornell.edu // perform operation on the value of the second futex 49413651Smw828@cornell.edu if (wake_op == OS::TGT_FUTEX_OP_SET) 49513651Smw828@cornell.edu newval = wake_oparg; 49613651Smw828@cornell.edu else if (wake_op == OS::TGT_FUTEX_OP_ADD) 49713651Smw828@cornell.edu newval += wake_oparg; 49813651Smw828@cornell.edu else if (wake_op == OS::TGT_FUTEX_OP_OR) 49913651Smw828@cornell.edu newval |= wake_oparg; 50013651Smw828@cornell.edu else if (wake_op == OS::TGT_FUTEX_OP_ANDN) 50113651Smw828@cornell.edu newval &= ~wake_oparg; 50213651Smw828@cornell.edu else if (wake_op == OS::TGT_FUTEX_OP_XOR) 50313651Smw828@cornell.edu newval ^= wake_oparg; 50413651Smw828@cornell.edu // copy updated value back to simulated-space 50513651Smw828@cornell.edu *(int*)buf.bufferPtr() = newval; 50613651Smw828@cornell.edu buf.copyOut(tc->getMemProxy()); 50713651Smw828@cornell.edu // perform the first wake-up 50813651Smw828@cornell.edu int woken1 = futex_map.wakeup(uaddr, process->tgid(), val); 50913651Smw828@cornell.edu int woken2 = 0; 51013651Smw828@cornell.edu // calculate the condition of the second wake-up 51113651Smw828@cornell.edu bool is_wake2 = false; 51213651Smw828@cornell.edu if (wake_cmp == OS::TGT_FUTEX_OP_CMP_EQ) 51313651Smw828@cornell.edu is_wake2 = oldval == wake_cmparg; 51413651Smw828@cornell.edu else if (wake_cmp == OS::TGT_FUTEX_OP_CMP_NE) 51513651Smw828@cornell.edu is_wake2 = oldval != wake_cmparg; 51613651Smw828@cornell.edu else if (wake_cmp == OS::TGT_FUTEX_OP_CMP_LT) 51713651Smw828@cornell.edu is_wake2 = oldval < wake_cmparg; 51813651Smw828@cornell.edu else if (wake_cmp == OS::TGT_FUTEX_OP_CMP_LE) 51913651Smw828@cornell.edu is_wake2 = oldval <= wake_cmparg; 52013651Smw828@cornell.edu else if (wake_cmp == OS::TGT_FUTEX_OP_CMP_GT) 52113651Smw828@cornell.edu is_wake2 = oldval > wake_cmparg; 52213651Smw828@cornell.edu else if (wake_cmp == OS::TGT_FUTEX_OP_CMP_GE) 52313651Smw828@cornell.edu is_wake2 = oldval >= wake_cmparg; 52413651Smw828@cornell.edu // perform the second wake-up 52513651Smw828@cornell.edu if (is_wake2) 52613651Smw828@cornell.edu woken2 = futex_map.wakeup(uaddr2, process->tgid(), timeout); 52713651Smw828@cornell.edu 52813651Smw828@cornell.edu return woken1 + woken2; 5299112Smarc.orr@gmail.com } 53011911SBrandon.Potter@amd.com warn("futex: op %d not implemented; ignoring.", op); 53111911SBrandon.Potter@amd.com return -ENOSYS; 5329112Smarc.orr@gmail.com} 5339112Smarc.orr@gmail.com 5342238SN/A 5352238SN/A/// Pseudo Funcs - These functions use a different return convension, 5362238SN/A/// returning a second value in a register other than the normal return register 5372238SN/ASyscallReturn pipePseudoFunc(SyscallDesc *desc, int num, 53811851Sbrandon.potter@amd.com Process *process, ThreadContext *tc); 5392238SN/A 5402238SN/A/// Target getpidPseudo() handler. 5412238SN/ASyscallReturn getpidPseudoFunc(SyscallDesc *desc, int num, 54211851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 5432238SN/A 5442238SN/A/// Target getuidPseudo() handler. 5452238SN/ASyscallReturn getuidPseudoFunc(SyscallDesc *desc, int num, 54611851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 5472238SN/A 5482238SN/A/// Target getgidPseudo() handler. 5492238SN/ASyscallReturn getgidPseudoFunc(SyscallDesc *desc, int num, 55011851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 5512238SN/A 5522238SN/A 5531354SN/A/// A readable name for 1,000,000, for converting microseconds to seconds. 5541354SN/Aconst int one_million = 1000000; 55510796Sbrandon.potter@amd.com/// A readable name for 1,000,000,000, for converting nanoseconds to seconds. 55610796Sbrandon.potter@amd.comconst int one_billion = 1000000000; 5571354SN/A 5581354SN/A/// Approximate seconds since the epoch (1/1/1970). About a billion, 5591354SN/A/// by my reckoning. We want to keep this a constant (not use the 5601354SN/A/// real-world time) to keep simulations repeatable. 5611354SN/Aconst unsigned seconds_since_epoch = 1000000000; 5621354SN/A 5631354SN/A/// Helper function to convert current elapsed time to seconds and 5641354SN/A/// microseconds. 5651354SN/Atemplate <class T1, class T2> 5661354SN/Avoid 56710796Sbrandon.potter@amd.comgetElapsedTimeMicro(T1 &sec, T2 &usec) 5681354SN/A{ 56910796Sbrandon.potter@amd.com uint64_t elapsed_usecs = curTick() / SimClock::Int::us; 5701354SN/A sec = elapsed_usecs / one_million; 5711354SN/A usec = elapsed_usecs % one_million; 5721354SN/A} 5731354SN/A 57410796Sbrandon.potter@amd.com/// Helper function to convert current elapsed time to seconds and 57510796Sbrandon.potter@amd.com/// nanoseconds. 57610796Sbrandon.potter@amd.comtemplate <class T1, class T2> 57710796Sbrandon.potter@amd.comvoid 57810796Sbrandon.potter@amd.comgetElapsedTimeNano(T1 &sec, T2 &nsec) 57910796Sbrandon.potter@amd.com{ 58010796Sbrandon.potter@amd.com uint64_t elapsed_nsecs = curTick() / SimClock::Int::ns; 58110796Sbrandon.potter@amd.com sec = elapsed_nsecs / one_billion; 58210796Sbrandon.potter@amd.com nsec = elapsed_nsecs % one_billion; 58310796Sbrandon.potter@amd.com} 58410796Sbrandon.potter@amd.com 585360SN/A////////////////////////////////////////////////////////////////////// 586360SN/A// 587360SN/A// The following emulation functions are generic, but need to be 588360SN/A// templated to account for differences in types, constants, etc. 589360SN/A// 590360SN/A////////////////////////////////////////////////////////////////////// 591360SN/A 59211759Sbrandon.potter@amd.com typedef struct statfs hst_statfs; 5933113Sgblack@eecs.umich.edu#if NO_STAT64 5943113Sgblack@eecs.umich.edu typedef struct stat hst_stat; 5953113Sgblack@eecs.umich.edu typedef struct stat hst_stat64; 5963113Sgblack@eecs.umich.edu#else 5973113Sgblack@eecs.umich.edu typedef struct stat hst_stat; 5983113Sgblack@eecs.umich.edu typedef struct stat64 hst_stat64; 5993113Sgblack@eecs.umich.edu#endif 6003113Sgblack@eecs.umich.edu 6013113Sgblack@eecs.umich.edu//// Helper function to convert a host stat buffer to a target stat 6023113Sgblack@eecs.umich.edu//// buffer. Also copies the target buffer out to the simulated 6033113Sgblack@eecs.umich.edu//// memory space. Used by stat(), fstat(), and lstat(). 6043113Sgblack@eecs.umich.edu 6053113Sgblack@eecs.umich.edutemplate <typename target_stat, typename host_stat> 60612032Sandreas.sandberg@arm.comvoid 6073113Sgblack@eecs.umich.educonvertStatBuf(target_stat &tgt, host_stat *host, bool fakeTTY = false) 6083113Sgblack@eecs.umich.edu{ 6094189Sgblack@eecs.umich.edu using namespace TheISA; 6104189Sgblack@eecs.umich.edu 6113113Sgblack@eecs.umich.edu if (fakeTTY) 6123113Sgblack@eecs.umich.edu tgt->st_dev = 0xA; 6133113Sgblack@eecs.umich.edu else 6143113Sgblack@eecs.umich.edu tgt->st_dev = host->st_dev; 6158737Skoansin.tan@gmail.com tgt->st_dev = TheISA::htog(tgt->st_dev); 6163113Sgblack@eecs.umich.edu tgt->st_ino = host->st_ino; 6178737Skoansin.tan@gmail.com tgt->st_ino = TheISA::htog(tgt->st_ino); 6183277Sgblack@eecs.umich.edu tgt->st_mode = host->st_mode; 6195515SMichael.Adler@intel.com if (fakeTTY) { 6205515SMichael.Adler@intel.com // Claim to be a character device 6215515SMichael.Adler@intel.com tgt->st_mode &= ~S_IFMT; // Clear S_IFMT 6225515SMichael.Adler@intel.com tgt->st_mode |= S_IFCHR; // Set S_IFCHR 6235515SMichael.Adler@intel.com } 6248737Skoansin.tan@gmail.com tgt->st_mode = TheISA::htog(tgt->st_mode); 6253277Sgblack@eecs.umich.edu tgt->st_nlink = host->st_nlink; 6268737Skoansin.tan@gmail.com tgt->st_nlink = TheISA::htog(tgt->st_nlink); 6273277Sgblack@eecs.umich.edu tgt->st_uid = host->st_uid; 6288737Skoansin.tan@gmail.com tgt->st_uid = TheISA::htog(tgt->st_uid); 6293277Sgblack@eecs.umich.edu tgt->st_gid = host->st_gid; 6308737Skoansin.tan@gmail.com tgt->st_gid = TheISA::htog(tgt->st_gid); 6313113Sgblack@eecs.umich.edu if (fakeTTY) 6323113Sgblack@eecs.umich.edu tgt->st_rdev = 0x880d; 6333113Sgblack@eecs.umich.edu else 6343113Sgblack@eecs.umich.edu tgt->st_rdev = host->st_rdev; 6358737Skoansin.tan@gmail.com tgt->st_rdev = TheISA::htog(tgt->st_rdev); 6363113Sgblack@eecs.umich.edu tgt->st_size = host->st_size; 6378737Skoansin.tan@gmail.com tgt->st_size = TheISA::htog(tgt->st_size); 6383114Sgblack@eecs.umich.edu tgt->st_atimeX = host->st_atime; 6398737Skoansin.tan@gmail.com tgt->st_atimeX = TheISA::htog(tgt->st_atimeX); 6403114Sgblack@eecs.umich.edu tgt->st_mtimeX = host->st_mtime; 6418737Skoansin.tan@gmail.com tgt->st_mtimeX = TheISA::htog(tgt->st_mtimeX); 6423114Sgblack@eecs.umich.edu tgt->st_ctimeX = host->st_ctime; 6438737Skoansin.tan@gmail.com tgt->st_ctimeX = TheISA::htog(tgt->st_ctimeX); 64411906SBrandon.Potter@amd.com // Force the block size to be 8KB. This helps to ensure buffered io works 6454061Sgblack@eecs.umich.edu // consistently across different hosts. 6464061Sgblack@eecs.umich.edu tgt->st_blksize = 0x2000; 6478737Skoansin.tan@gmail.com tgt->st_blksize = TheISA::htog(tgt->st_blksize); 6483113Sgblack@eecs.umich.edu tgt->st_blocks = host->st_blocks; 6498737Skoansin.tan@gmail.com tgt->st_blocks = TheISA::htog(tgt->st_blocks); 6503113Sgblack@eecs.umich.edu} 6513113Sgblack@eecs.umich.edu 6523113Sgblack@eecs.umich.edu// Same for stat64 6533113Sgblack@eecs.umich.edu 6543113Sgblack@eecs.umich.edutemplate <typename target_stat, typename host_stat64> 65512032Sandreas.sandberg@arm.comvoid 6563113Sgblack@eecs.umich.educonvertStat64Buf(target_stat &tgt, host_stat64 *host, bool fakeTTY = false) 6573113Sgblack@eecs.umich.edu{ 6584189Sgblack@eecs.umich.edu using namespace TheISA; 6594189Sgblack@eecs.umich.edu 6603113Sgblack@eecs.umich.edu convertStatBuf<target_stat, host_stat64>(tgt, host, fakeTTY); 6613113Sgblack@eecs.umich.edu#if defined(STAT_HAVE_NSEC) 6623113Sgblack@eecs.umich.edu tgt->st_atime_nsec = host->st_atime_nsec; 6638737Skoansin.tan@gmail.com tgt->st_atime_nsec = TheISA::htog(tgt->st_atime_nsec); 6643113Sgblack@eecs.umich.edu tgt->st_mtime_nsec = host->st_mtime_nsec; 6658737Skoansin.tan@gmail.com tgt->st_mtime_nsec = TheISA::htog(tgt->st_mtime_nsec); 6663113Sgblack@eecs.umich.edu tgt->st_ctime_nsec = host->st_ctime_nsec; 6678737Skoansin.tan@gmail.com tgt->st_ctime_nsec = TheISA::htog(tgt->st_ctime_nsec); 6683113Sgblack@eecs.umich.edu#else 6693113Sgblack@eecs.umich.edu tgt->st_atime_nsec = 0; 6703113Sgblack@eecs.umich.edu tgt->st_mtime_nsec = 0; 6713113Sgblack@eecs.umich.edu tgt->st_ctime_nsec = 0; 6723113Sgblack@eecs.umich.edu#endif 6733113Sgblack@eecs.umich.edu} 6743113Sgblack@eecs.umich.edu 67511906SBrandon.Potter@amd.com// Here are a couple of convenience functions 6763113Sgblack@eecs.umich.edutemplate<class OS> 67712032Sandreas.sandberg@arm.comvoid 6788852Sandreas.hansson@arm.comcopyOutStatBuf(SETranslatingPortProxy &mem, Addr addr, 67911906SBrandon.Potter@amd.com hst_stat *host, bool fakeTTY = false) 6803113Sgblack@eecs.umich.edu{ 6813113Sgblack@eecs.umich.edu typedef TypedBufferArg<typename OS::tgt_stat> tgt_stat_buf; 6823113Sgblack@eecs.umich.edu tgt_stat_buf tgt(addr); 6833113Sgblack@eecs.umich.edu convertStatBuf<tgt_stat_buf, hst_stat>(tgt, host, fakeTTY); 6843113Sgblack@eecs.umich.edu tgt.copyOut(mem); 6853113Sgblack@eecs.umich.edu} 6863113Sgblack@eecs.umich.edu 6873113Sgblack@eecs.umich.edutemplate<class OS> 68812032Sandreas.sandberg@arm.comvoid 6898852Sandreas.hansson@arm.comcopyOutStat64Buf(SETranslatingPortProxy &mem, Addr addr, 69011906SBrandon.Potter@amd.com hst_stat64 *host, bool fakeTTY = false) 6913113Sgblack@eecs.umich.edu{ 6923113Sgblack@eecs.umich.edu typedef TypedBufferArg<typename OS::tgt_stat64> tgt_stat_buf; 6933113Sgblack@eecs.umich.edu tgt_stat_buf tgt(addr); 6946686Stjones1@inf.ed.ac.uk convertStat64Buf<tgt_stat_buf, hst_stat64>(tgt, host, fakeTTY); 6953113Sgblack@eecs.umich.edu tgt.copyOut(mem); 6963113Sgblack@eecs.umich.edu} 6973113Sgblack@eecs.umich.edu 69811759Sbrandon.potter@amd.comtemplate <class OS> 69912032Sandreas.sandberg@arm.comvoid 70011759Sbrandon.potter@amd.comcopyOutStatfsBuf(SETranslatingPortProxy &mem, Addr addr, 70111759Sbrandon.potter@amd.com hst_statfs *host) 70211759Sbrandon.potter@amd.com{ 70311759Sbrandon.potter@amd.com TypedBufferArg<typename OS::tgt_statfs> tgt(addr); 70411759Sbrandon.potter@amd.com 70511812Sbaz21@cam.ac.uk tgt->f_type = TheISA::htog(host->f_type); 70611812Sbaz21@cam.ac.uk#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) 70711812Sbaz21@cam.ac.uk tgt->f_bsize = TheISA::htog(host->f_iosize); 70811759Sbrandon.potter@amd.com#else 70911812Sbaz21@cam.ac.uk tgt->f_bsize = TheISA::htog(host->f_bsize); 71011759Sbrandon.potter@amd.com#endif 71111759Sbrandon.potter@amd.com tgt->f_blocks = TheISA::htog(host->f_blocks); 71211759Sbrandon.potter@amd.com tgt->f_bfree = TheISA::htog(host->f_bfree); 71311759Sbrandon.potter@amd.com tgt->f_bavail = TheISA::htog(host->f_bavail); 71411759Sbrandon.potter@amd.com tgt->f_files = TheISA::htog(host->f_files); 71511759Sbrandon.potter@amd.com tgt->f_ffree = TheISA::htog(host->f_ffree); 71611759Sbrandon.potter@amd.com memcpy(&tgt->f_fsid, &host->f_fsid, sizeof(host->f_fsid)); 71711812Sbaz21@cam.ac.uk#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) 71811812Sbaz21@cam.ac.uk tgt->f_namelen = TheISA::htog(host->f_namemax); 71911812Sbaz21@cam.ac.uk tgt->f_frsize = TheISA::htog(host->f_bsize); 72011812Sbaz21@cam.ac.uk#elif defined(__APPLE__) 72111812Sbaz21@cam.ac.uk tgt->f_namelen = 0; 72211812Sbaz21@cam.ac.uk tgt->f_frsize = 0; 72311812Sbaz21@cam.ac.uk#else 72411759Sbrandon.potter@amd.com tgt->f_namelen = TheISA::htog(host->f_namelen); 72511759Sbrandon.potter@amd.com tgt->f_frsize = TheISA::htog(host->f_frsize); 72611812Sbaz21@cam.ac.uk#endif 72711812Sbaz21@cam.ac.uk#if defined(__linux__) 72811759Sbrandon.potter@amd.com memcpy(&tgt->f_spare, &host->f_spare, sizeof(host->f_spare)); 72911812Sbaz21@cam.ac.uk#else 73011812Sbaz21@cam.ac.uk /* 73111812Sbaz21@cam.ac.uk * The fields are different sizes per OS. Don't bother with 73211812Sbaz21@cam.ac.uk * f_spare or f_reserved on non-Linux for now. 73311812Sbaz21@cam.ac.uk */ 73411812Sbaz21@cam.ac.uk memset(&tgt->f_spare, 0, sizeof(tgt->f_spare)); 73511812Sbaz21@cam.ac.uk#endif 73611759Sbrandon.potter@amd.com 73711759Sbrandon.potter@amd.com tgt.copyOut(mem); 73811759Sbrandon.potter@amd.com} 73911759Sbrandon.potter@amd.com 740378SN/A/// Target ioctl() handler. For the most part, programs call ioctl() 741378SN/A/// only to find out if their stdout is a tty, to determine whether to 7429141Smarc.orr@gmail.com/// do line or block buffering. We always claim that output fds are 7439141Smarc.orr@gmail.com/// not TTYs to provide repeatable results. 744360SN/Atemplate <class OS> 7451450SN/ASyscallReturn 74611856Sbrandon.potter@amd.comioctlFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 747360SN/A{ 7486701Sgblack@eecs.umich.edu int index = 0; 74911856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 75011856Sbrandon.potter@amd.com unsigned req = p->getSyscallArg(tc, index); 751360SN/A 75210930Sbrandon.potter@amd.com DPRINTF(SyscallVerbose, "ioctl(%d, 0x%x, ...)\n", tgt_fd, req); 753360SN/A 75411856Sbrandon.potter@amd.com if (OS::isTtyReq(req)) 75511856Sbrandon.potter@amd.com return -ENOTTY; 75610496Ssteve.reinhardt@amd.com 75711856Sbrandon.potter@amd.com auto dfdp = std::dynamic_pointer_cast<DeviceFDEntry>((*p->fds)[tgt_fd]); 75811856Sbrandon.potter@amd.com if (!dfdp) 7591458SN/A return -EBADF; 760360SN/A 76111856Sbrandon.potter@amd.com /** 76211856Sbrandon.potter@amd.com * If the driver is valid, issue the ioctl through it. Otherwise, 76311856Sbrandon.potter@amd.com * there's an implicit assumption that the device is a TTY type and we 76411856Sbrandon.potter@amd.com * return that we do not have a valid TTY. 76511856Sbrandon.potter@amd.com */ 76611856Sbrandon.potter@amd.com EmulatedDriver *emul_driver = dfdp->getDriver(); 76711856Sbrandon.potter@amd.com if (emul_driver) 76811856Sbrandon.potter@amd.com return emul_driver->ioctl(p, tc, req); 76910496Ssteve.reinhardt@amd.com 77011856Sbrandon.potter@amd.com /** 77111856Sbrandon.potter@amd.com * For lack of a better return code, return ENOTTY. Ideally, we should 77211856Sbrandon.potter@amd.com * return something better here, but at least we issue the warning. 77311856Sbrandon.potter@amd.com */ 77411856Sbrandon.potter@amd.com warn("Unsupported ioctl call (return ENOTTY): ioctl(%d, 0x%x, ...) @ \n", 77510930Sbrandon.potter@amd.com tgt_fd, req, tc->pcState()); 7769141Smarc.orr@gmail.com return -ENOTTY; 777360SN/A} 778360SN/A 779360SN/Atemplate <class OS> 78011907SBrandon.Potter@amd.comSyscallReturn 78111907SBrandon.Potter@amd.comopenImpl(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc, 78211907SBrandon.Potter@amd.com bool isopenat) 783360SN/A{ 78411907SBrandon.Potter@amd.com int index = 0; 78511907SBrandon.Potter@amd.com int tgt_dirfd = -1; 78611907SBrandon.Potter@amd.com 78711907SBrandon.Potter@amd.com /** 78811907SBrandon.Potter@amd.com * If using the openat variant, read in the target directory file 78911907SBrandon.Potter@amd.com * descriptor from the simulated process. 79011907SBrandon.Potter@amd.com */ 79111907SBrandon.Potter@amd.com if (isopenat) 79211907SBrandon.Potter@amd.com tgt_dirfd = p->getSyscallArg(tc, index); 79311907SBrandon.Potter@amd.com 79411907SBrandon.Potter@amd.com /** 79511907SBrandon.Potter@amd.com * Retrieve the simulated process' memory proxy and then read in the path 79611907SBrandon.Potter@amd.com * string from that memory space into the host's working memory space. 79711907SBrandon.Potter@amd.com */ 798360SN/A std::string path; 79911907SBrandon.Potter@amd.com if (!tc->getMemProxy().tryReadString(path, p->getSyscallArg(tc, index))) 8001458SN/A return -EFAULT; 801360SN/A 80211907SBrandon.Potter@amd.com#ifdef __CYGWIN32__ 80311907SBrandon.Potter@amd.com int host_flags = O_BINARY; 80411907SBrandon.Potter@amd.com#else 80511907SBrandon.Potter@amd.com int host_flags = 0; 80611907SBrandon.Potter@amd.com#endif 80711907SBrandon.Potter@amd.com /** 80811907SBrandon.Potter@amd.com * Translate target flags into host flags. Flags exist which are not 80911907SBrandon.Potter@amd.com * ported between architectures which can cause check failures. 81011907SBrandon.Potter@amd.com */ 81111907SBrandon.Potter@amd.com int tgt_flags = p->getSyscallArg(tc, index); 812360SN/A for (int i = 0; i < OS::NUM_OPEN_FLAGS; i++) { 81311907SBrandon.Potter@amd.com if (tgt_flags & OS::openFlagTable[i].tgtFlag) { 81411907SBrandon.Potter@amd.com tgt_flags &= ~OS::openFlagTable[i].tgtFlag; 81511907SBrandon.Potter@amd.com host_flags |= OS::openFlagTable[i].hostFlag; 816360SN/A } 817360SN/A } 81811907SBrandon.Potter@amd.com if (tgt_flags) { 81911907SBrandon.Potter@amd.com warn("open%s: cannot decode flags 0x%x", 82011907SBrandon.Potter@amd.com isopenat ? "at" : "", tgt_flags); 82111907SBrandon.Potter@amd.com } 822360SN/A#ifdef __CYGWIN32__ 82311907SBrandon.Potter@amd.com host_flags |= O_BINARY; 824360SN/A#endif 825360SN/A 82611907SBrandon.Potter@amd.com int mode = p->getSyscallArg(tc, index); 8273669Sbinkertn@umich.edu 82811907SBrandon.Potter@amd.com /** 82911907SBrandon.Potter@amd.com * If the simulated process called open or openat with AT_FDCWD specified, 83011907SBrandon.Potter@amd.com * take the current working directory value which was passed into the 83111907SBrandon.Potter@amd.com * process class as a Python parameter and append the current path to 83211907SBrandon.Potter@amd.com * create a full path. 83311907SBrandon.Potter@amd.com * Otherwise, openat with a valid target directory file descriptor has 83411907SBrandon.Potter@amd.com * been called. If the path option, which was passed in as a parameter, 83511907SBrandon.Potter@amd.com * is not absolute, retrieve the directory file descriptor's path and 83611907SBrandon.Potter@amd.com * prepend it to the path passed in as a parameter. 83711907SBrandon.Potter@amd.com * In every case, we should have a full path (which is relevant to the 83811907SBrandon.Potter@amd.com * host) to work with after this block has been passed. 83911907SBrandon.Potter@amd.com */ 84013883Sdavid.hashe@amd.com std::string redir_path = path; 84113883Sdavid.hashe@amd.com std::string abs_path = path; 84213883Sdavid.hashe@amd.com if (!isopenat || tgt_dirfd == OS::TGT_AT_FDCWD) { 84313883Sdavid.hashe@amd.com abs_path = p->absolutePath(path, true); 84413883Sdavid.hashe@amd.com redir_path = p->checkPathRedirect(path); 84511907SBrandon.Potter@amd.com } else if (!startswith(path, "/")) { 84611907SBrandon.Potter@amd.com std::shared_ptr<FDEntry> fdep = ((*p->fds)[tgt_dirfd]); 84711907SBrandon.Potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(fdep); 84811907SBrandon.Potter@amd.com if (!ffdp) 84911907SBrandon.Potter@amd.com return -EBADF; 85013883Sdavid.hashe@amd.com abs_path = ffdp->getFileName() + path; 85113883Sdavid.hashe@amd.com redir_path = p->checkPathRedirect(abs_path); 85211907SBrandon.Potter@amd.com } 8531706SN/A 85411907SBrandon.Potter@amd.com /** 85511907SBrandon.Potter@amd.com * Since this is an emulated environment, we create pseudo file 85611907SBrandon.Potter@amd.com * descriptors for device requests that have been registered with 85711907SBrandon.Potter@amd.com * the process class through Python; this allows us to create a file 85811907SBrandon.Potter@amd.com * descriptor for subsequent ioctl or mmap calls. 85911907SBrandon.Potter@amd.com */ 86013883Sdavid.hashe@amd.com if (startswith(abs_path, "/dev/")) { 86113883Sdavid.hashe@amd.com std::string filename = abs_path.substr(strlen("/dev/")); 86211907SBrandon.Potter@amd.com EmulatedDriver *drv = p->findDriver(filename); 86311907SBrandon.Potter@amd.com if (drv) { 86411907SBrandon.Potter@amd.com DPRINTF_SYSCALL(Verbose, "open%s: passing call to " 86511907SBrandon.Potter@amd.com "driver open with path[%s]\n", 86613883Sdavid.hashe@amd.com isopenat ? "at" : "", abs_path.c_str()); 86711907SBrandon.Potter@amd.com return drv->open(p, tc, mode, host_flags); 86810496Ssteve.reinhardt@amd.com } 86911907SBrandon.Potter@amd.com /** 87011907SBrandon.Potter@amd.com * Fall through here for pass through to host devices, such 87111907SBrandon.Potter@amd.com * as /dev/zero 87211907SBrandon.Potter@amd.com */ 87310496Ssteve.reinhardt@amd.com } 87410496Ssteve.reinhardt@amd.com 87511907SBrandon.Potter@amd.com /** 87613883Sdavid.hashe@amd.com * We make several attempts resolve a call to open. 87713883Sdavid.hashe@amd.com * 87813883Sdavid.hashe@amd.com * 1) Resolve any path redirection before hand. This will set the path 87913883Sdavid.hashe@amd.com * up with variable 'redir_path' which may contain a modified path or 88013883Sdavid.hashe@amd.com * the original path value. This should already be done in prior code. 88113883Sdavid.hashe@amd.com * 2) Try to handle the access using 'special_paths'. Some special_paths 88213883Sdavid.hashe@amd.com * and files cannot be called on the host and need to be handled as 88313883Sdavid.hashe@amd.com * special cases inside the simulator. These special_paths are handled by 88413883Sdavid.hashe@amd.com * C++ routines to provide output back to userspace. 88513883Sdavid.hashe@amd.com * 3) If the full path that was created above does not match any of the 88613883Sdavid.hashe@amd.com * special cases, pass it through to the open call on the __HOST__ to let 88713883Sdavid.hashe@amd.com * the host open the file on our behalf. Again, the openImpl tries to 88813883Sdavid.hashe@amd.com * USE_THE_HOST_FILESYSTEM_OPEN (with a possible redirection to the 88913883Sdavid.hashe@amd.com * faux-filesystem files). The faux-filesystem is dynamically created 89013883Sdavid.hashe@amd.com * during simulator configuration using Python functions. 89113883Sdavid.hashe@amd.com * 4) If the host cannot open the file, the open attempt failed in "3)". 89213883Sdavid.hashe@amd.com * Return the host's error code back through the system call to the 89313883Sdavid.hashe@amd.com * simulated process. If running a debug trace, also notify the user that 89413883Sdavid.hashe@amd.com * the open call failed. 89513883Sdavid.hashe@amd.com * 89613883Sdavid.hashe@amd.com * Any success will set sim_fd to something other than -1 and skip the 89713883Sdavid.hashe@amd.com * next conditions effectively bypassing them. 89811907SBrandon.Potter@amd.com */ 89911907SBrandon.Potter@amd.com int sim_fd = -1; 90013883Sdavid.hashe@amd.com std::string used_path; 90111907SBrandon.Potter@amd.com std::vector<std::string> special_paths = 90213883Sdavid.hashe@amd.com { "/proc/meminfo/", "/system/", "/sys/", "/platform/", 90313883Sdavid.hashe@amd.com "/etc/passwd" }; 90411907SBrandon.Potter@amd.com for (auto entry : special_paths) { 90513883Sdavid.hashe@amd.com if (startswith(path, entry)) { 90613883Sdavid.hashe@amd.com sim_fd = OS::openSpecialFile(abs_path, p, tc); 90713883Sdavid.hashe@amd.com used_path = abs_path; 90813883Sdavid.hashe@amd.com } 90911907SBrandon.Potter@amd.com } 91011907SBrandon.Potter@amd.com if (sim_fd == -1) { 91113883Sdavid.hashe@amd.com sim_fd = open(redir_path.c_str(), host_flags, mode); 91213883Sdavid.hashe@amd.com used_path = redir_path; 91311907SBrandon.Potter@amd.com } 91411907SBrandon.Potter@amd.com if (sim_fd == -1) { 91511907SBrandon.Potter@amd.com int local = -errno; 91613883Sdavid.hashe@amd.com DPRINTF_SYSCALL(Verbose, "open%s: failed -> path:%s " 91713883Sdavid.hashe@amd.com "(inferred from:%s)\n", isopenat ? "at" : "", 91813883Sdavid.hashe@amd.com used_path.c_str(), path.c_str()); 91911907SBrandon.Potter@amd.com return local; 92011907SBrandon.Potter@amd.com } 921360SN/A 92211907SBrandon.Potter@amd.com /** 92311907SBrandon.Potter@amd.com * The file was opened successfully and needs to be recorded in the 92411907SBrandon.Potter@amd.com * process' file descriptor array so that it can be retrieved later. 92511907SBrandon.Potter@amd.com * The target file descriptor that is chosen will be the lowest unused 92611907SBrandon.Potter@amd.com * file descriptor. 92711907SBrandon.Potter@amd.com * Return the indirect target file descriptor back to the simulated 92811907SBrandon.Potter@amd.com * process to act as a handle for the opened file. 92911907SBrandon.Potter@amd.com */ 93011907SBrandon.Potter@amd.com auto ffdp = std::make_shared<FileFDEntry>(sim_fd, host_flags, path, 0); 93111907SBrandon.Potter@amd.com int tgt_fd = p->fds->allocFD(ffdp); 93213883Sdavid.hashe@amd.com DPRINTF_SYSCALL(Verbose, "open%s: sim_fd[%d], target_fd[%d] -> path:%s\n" 93313883Sdavid.hashe@amd.com "(inferred from:%s)\n", isopenat ? "at" : "", 93413883Sdavid.hashe@amd.com sim_fd, tgt_fd, used_path.c_str(), path.c_str()); 93511907SBrandon.Potter@amd.com return tgt_fd; 936360SN/A} 937360SN/A 93810027SChris.Adeniyi-Jones@arm.com/// Target open() handler. 93910027SChris.Adeniyi-Jones@arm.comtemplate <class OS> 94010027SChris.Adeniyi-Jones@arm.comSyscallReturn 94111851Sbrandon.potter@amd.comopenFunc(SyscallDesc *desc, int callnum, Process *process, 94210027SChris.Adeniyi-Jones@arm.com ThreadContext *tc) 94310027SChris.Adeniyi-Jones@arm.com{ 94411907SBrandon.Potter@amd.com return openImpl<OS>(desc, callnum, process, tc, false); 94510027SChris.Adeniyi-Jones@arm.com} 94610027SChris.Adeniyi-Jones@arm.com 94710027SChris.Adeniyi-Jones@arm.com/// Target openat() handler. 94810027SChris.Adeniyi-Jones@arm.comtemplate <class OS> 94910027SChris.Adeniyi-Jones@arm.comSyscallReturn 95011851Sbrandon.potter@amd.comopenatFunc(SyscallDesc *desc, int callnum, Process *process, 95111851Sbrandon.potter@amd.com ThreadContext *tc) 95210027SChris.Adeniyi-Jones@arm.com{ 95311907SBrandon.Potter@amd.com return openImpl<OS>(desc, callnum, process, tc, true); 95410027SChris.Adeniyi-Jones@arm.com} 95510027SChris.Adeniyi-Jones@arm.com 95610633Smichaelupton@gmail.com/// Target unlinkat() handler. 95710633Smichaelupton@gmail.comtemplate <class OS> 95810633Smichaelupton@gmail.comSyscallReturn 95911851Sbrandon.potter@amd.comunlinkatFunc(SyscallDesc *desc, int callnum, Process *process, 96010633Smichaelupton@gmail.com ThreadContext *tc) 96110633Smichaelupton@gmail.com{ 96210633Smichaelupton@gmail.com int index = 0; 96310633Smichaelupton@gmail.com int dirfd = process->getSyscallArg(tc, index); 96410633Smichaelupton@gmail.com if (dirfd != OS::TGT_AT_FDCWD) 96510633Smichaelupton@gmail.com warn("unlinkat: first argument not AT_FDCWD; unlikely to work"); 96610633Smichaelupton@gmail.com 96710633Smichaelupton@gmail.com return unlinkHelper(desc, callnum, process, tc, 1); 96810633Smichaelupton@gmail.com} 96910633Smichaelupton@gmail.com 97010203SAli.Saidi@ARM.com/// Target facessat() handler 97110203SAli.Saidi@ARM.comtemplate <class OS> 97210203SAli.Saidi@ARM.comSyscallReturn 97311851Sbrandon.potter@amd.comfaccessatFunc(SyscallDesc *desc, int callnum, Process *process, 97411851Sbrandon.potter@amd.com ThreadContext *tc) 97510203SAli.Saidi@ARM.com{ 97610203SAli.Saidi@ARM.com int index = 0; 97710203SAli.Saidi@ARM.com int dirfd = process->getSyscallArg(tc, index); 97810203SAli.Saidi@ARM.com if (dirfd != OS::TGT_AT_FDCWD) 97910203SAli.Saidi@ARM.com warn("faccessat: first argument not AT_FDCWD; unlikely to work"); 98010203SAli.Saidi@ARM.com return accessFunc(desc, callnum, process, tc, 1); 98110203SAli.Saidi@ARM.com} 98210203SAli.Saidi@ARM.com 98310203SAli.Saidi@ARM.com/// Target readlinkat() handler 98410203SAli.Saidi@ARM.comtemplate <class OS> 98510203SAli.Saidi@ARM.comSyscallReturn 98611851Sbrandon.potter@amd.comreadlinkatFunc(SyscallDesc *desc, int callnum, Process *process, 98711851Sbrandon.potter@amd.com ThreadContext *tc) 98810203SAli.Saidi@ARM.com{ 98910203SAli.Saidi@ARM.com int index = 0; 99010203SAli.Saidi@ARM.com int dirfd = process->getSyscallArg(tc, index); 99110203SAli.Saidi@ARM.com if (dirfd != OS::TGT_AT_FDCWD) 99210203SAli.Saidi@ARM.com warn("openat: first argument not AT_FDCWD; unlikely to work"); 99310203SAli.Saidi@ARM.com return readlinkFunc(desc, callnum, process, tc, 1); 99410203SAli.Saidi@ARM.com} 99510203SAli.Saidi@ARM.com 99610850SGiacomo.Gabrielli@arm.com/// Target renameat() handler. 99710850SGiacomo.Gabrielli@arm.comtemplate <class OS> 99810850SGiacomo.Gabrielli@arm.comSyscallReturn 99911851Sbrandon.potter@amd.comrenameatFunc(SyscallDesc *desc, int callnum, Process *process, 100010850SGiacomo.Gabrielli@arm.com ThreadContext *tc) 100110850SGiacomo.Gabrielli@arm.com{ 100210850SGiacomo.Gabrielli@arm.com int index = 0; 100310850SGiacomo.Gabrielli@arm.com 100410850SGiacomo.Gabrielli@arm.com int olddirfd = process->getSyscallArg(tc, index); 100510850SGiacomo.Gabrielli@arm.com if (olddirfd != OS::TGT_AT_FDCWD) 100610850SGiacomo.Gabrielli@arm.com warn("renameat: first argument not AT_FDCWD; unlikely to work"); 100710850SGiacomo.Gabrielli@arm.com 100810850SGiacomo.Gabrielli@arm.com std::string old_name; 100910850SGiacomo.Gabrielli@arm.com 101010850SGiacomo.Gabrielli@arm.com if (!tc->getMemProxy().tryReadString(old_name, 101110850SGiacomo.Gabrielli@arm.com process->getSyscallArg(tc, index))) 101210850SGiacomo.Gabrielli@arm.com return -EFAULT; 101310850SGiacomo.Gabrielli@arm.com 101410850SGiacomo.Gabrielli@arm.com int newdirfd = process->getSyscallArg(tc, index); 101510850SGiacomo.Gabrielli@arm.com if (newdirfd != OS::TGT_AT_FDCWD) 101610850SGiacomo.Gabrielli@arm.com warn("renameat: third argument not AT_FDCWD; unlikely to work"); 101710850SGiacomo.Gabrielli@arm.com 101810850SGiacomo.Gabrielli@arm.com std::string new_name; 101910850SGiacomo.Gabrielli@arm.com 102010850SGiacomo.Gabrielli@arm.com if (!tc->getMemProxy().tryReadString(new_name, 102110850SGiacomo.Gabrielli@arm.com process->getSyscallArg(tc, index))) 102210850SGiacomo.Gabrielli@arm.com return -EFAULT; 102310850SGiacomo.Gabrielli@arm.com 102413883Sdavid.hashe@amd.com // Adjust path for cwd and redirection 102513883Sdavid.hashe@amd.com old_name = process->checkPathRedirect(old_name); 102613883Sdavid.hashe@amd.com new_name = process->checkPathRedirect(new_name); 102710850SGiacomo.Gabrielli@arm.com 102810850SGiacomo.Gabrielli@arm.com int result = rename(old_name.c_str(), new_name.c_str()); 102910850SGiacomo.Gabrielli@arm.com return (result == -1) ? -errno : result; 103010850SGiacomo.Gabrielli@arm.com} 103110850SGiacomo.Gabrielli@arm.com 10326640Svince@csl.cornell.edu/// Target sysinfo() handler. 10336640Svince@csl.cornell.edutemplate <class OS> 10346640Svince@csl.cornell.eduSyscallReturn 103511851Sbrandon.potter@amd.comsysinfoFunc(SyscallDesc *desc, int callnum, Process *process, 103611851Sbrandon.potter@amd.com ThreadContext *tc) 10376640Svince@csl.cornell.edu{ 10386640Svince@csl.cornell.edu 10396701Sgblack@eecs.umich.edu int index = 0; 10406701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::tgt_sysinfo> 104110793Sbrandon.potter@amd.com sysinfo(process->getSyscallArg(tc, index)); 10426640Svince@csl.cornell.edu 104311758Sbrandon.potter@amd.com sysinfo->uptime = seconds_since_epoch; 104411758Sbrandon.potter@amd.com sysinfo->totalram = process->system->memSize(); 104511758Sbrandon.potter@amd.com sysinfo->mem_unit = 1; 10466640Svince@csl.cornell.edu 10478706Sandreas.hansson@arm.com sysinfo.copyOut(tc->getMemProxy()); 10486640Svince@csl.cornell.edu 10496701Sgblack@eecs.umich.edu return 0; 10506640Svince@csl.cornell.edu} 1051360SN/A 10521999SN/A/// Target chmod() handler. 10531999SN/Atemplate <class OS> 10541999SN/ASyscallReturn 105511851Sbrandon.potter@amd.comchmodFunc(SyscallDesc *desc, int callnum, Process *process, 10562680Sktlim@umich.edu ThreadContext *tc) 10571999SN/A{ 10581999SN/A std::string path; 10591999SN/A 10606701Sgblack@eecs.umich.edu int index = 0; 10618852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 10626701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 10631999SN/A return -EFAULT; 10646701Sgblack@eecs.umich.edu } 10651999SN/A 10666701Sgblack@eecs.umich.edu uint32_t mode = process->getSyscallArg(tc, index); 10671999SN/A mode_t hostMode = 0; 10681999SN/A 10691999SN/A // XXX translate mode flags via OS::something??? 10701999SN/A hostMode = mode; 10711999SN/A 107213883Sdavid.hashe@amd.com // Adjust path for cwd and redirection 107313883Sdavid.hashe@amd.com path = process->checkPathRedirect(path); 10743669Sbinkertn@umich.edu 10751999SN/A // do the chmod 10761999SN/A int result = chmod(path.c_str(), hostMode); 10771999SN/A if (result < 0) 10782218SN/A return -errno; 10791999SN/A 10801999SN/A return 0; 10811999SN/A} 10821999SN/A 108313570Sbrandon.potter@amd.comtemplate <class OS> 108413570Sbrandon.potter@amd.comSyscallReturn 108513570Sbrandon.potter@amd.compollFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 108613570Sbrandon.potter@amd.com{ 108713570Sbrandon.potter@amd.com int index = 0; 108813570Sbrandon.potter@amd.com Addr fdsPtr = p->getSyscallArg(tc, index); 108913570Sbrandon.potter@amd.com int nfds = p->getSyscallArg(tc, index); 109013570Sbrandon.potter@amd.com int tmout = p->getSyscallArg(tc, index); 109113570Sbrandon.potter@amd.com 109213570Sbrandon.potter@amd.com BufferArg fdsBuf(fdsPtr, sizeof(struct pollfd) * nfds); 109313570Sbrandon.potter@amd.com fdsBuf.copyIn(tc->getMemProxy()); 109413570Sbrandon.potter@amd.com 109513570Sbrandon.potter@amd.com /** 109613570Sbrandon.potter@amd.com * Record the target file descriptors in a local variable. We need to 109713570Sbrandon.potter@amd.com * replace them with host file descriptors but we need a temporary copy 109813570Sbrandon.potter@amd.com * for later. Afterwards, replace each target file descriptor in the 109913570Sbrandon.potter@amd.com * poll_fd array with its host_fd. 110013570Sbrandon.potter@amd.com */ 110113570Sbrandon.potter@amd.com int temp_tgt_fds[nfds]; 110213570Sbrandon.potter@amd.com for (index = 0; index < nfds; index++) { 110313570Sbrandon.potter@amd.com temp_tgt_fds[index] = ((struct pollfd *)fdsBuf.bufferPtr())[index].fd; 110413570Sbrandon.potter@amd.com auto tgt_fd = temp_tgt_fds[index]; 110513570Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 110613570Sbrandon.potter@amd.com if (!hbfdp) 110713570Sbrandon.potter@amd.com return -EBADF; 110813570Sbrandon.potter@amd.com auto host_fd = hbfdp->getSimFD(); 110913570Sbrandon.potter@amd.com ((struct pollfd *)fdsBuf.bufferPtr())[index].fd = host_fd; 111013570Sbrandon.potter@amd.com } 111113570Sbrandon.potter@amd.com 111213570Sbrandon.potter@amd.com /** 111313570Sbrandon.potter@amd.com * We cannot allow an infinite poll to occur or it will inevitably cause 111413570Sbrandon.potter@amd.com * a deadlock in the gem5 simulator with clone. We must pass in tmout with 111513570Sbrandon.potter@amd.com * a non-negative value, however it also makes no sense to poll on the 111613570Sbrandon.potter@amd.com * underlying host for any other time than tmout a zero timeout. 111713570Sbrandon.potter@amd.com */ 111813570Sbrandon.potter@amd.com int status; 111913570Sbrandon.potter@amd.com if (tmout < 0) { 112013570Sbrandon.potter@amd.com status = poll((struct pollfd *)fdsBuf.bufferPtr(), nfds, 0); 112113570Sbrandon.potter@amd.com if (status == 0) { 112213570Sbrandon.potter@amd.com /** 112313570Sbrandon.potter@amd.com * If blocking indefinitely, check the signal list to see if a 112413570Sbrandon.potter@amd.com * signal would break the poll out of the retry cycle and try 112513570Sbrandon.potter@amd.com * to return the signal interrupt instead. 112613570Sbrandon.potter@amd.com */ 112713570Sbrandon.potter@amd.com System *sysh = tc->getSystemPtr(); 112813570Sbrandon.potter@amd.com std::list<BasicSignal>::iterator it; 112913570Sbrandon.potter@amd.com for (it=sysh->signalList.begin(); it!=sysh->signalList.end(); it++) 113013570Sbrandon.potter@amd.com if (it->receiver == p) 113113570Sbrandon.potter@amd.com return -EINTR; 113213570Sbrandon.potter@amd.com return SyscallReturn::retry(); 113313570Sbrandon.potter@amd.com } 113413570Sbrandon.potter@amd.com } else 113513570Sbrandon.potter@amd.com status = poll((struct pollfd *)fdsBuf.bufferPtr(), nfds, 0); 113613570Sbrandon.potter@amd.com 113713570Sbrandon.potter@amd.com if (status == -1) 113813570Sbrandon.potter@amd.com return -errno; 113913570Sbrandon.potter@amd.com 114013570Sbrandon.potter@amd.com /** 114113570Sbrandon.potter@amd.com * Replace each host_fd in the returned poll_fd array with its original 114213570Sbrandon.potter@amd.com * target file descriptor. 114313570Sbrandon.potter@amd.com */ 114413570Sbrandon.potter@amd.com for (index = 0; index < nfds; index++) { 114513570Sbrandon.potter@amd.com auto tgt_fd = temp_tgt_fds[index]; 114613570Sbrandon.potter@amd.com ((struct pollfd *)fdsBuf.bufferPtr())[index].fd = tgt_fd; 114713570Sbrandon.potter@amd.com } 114813570Sbrandon.potter@amd.com 114913570Sbrandon.potter@amd.com /** 115013570Sbrandon.potter@amd.com * Copy out the pollfd struct because the host may have updated fields 115113570Sbrandon.potter@amd.com * in the structure. 115213570Sbrandon.potter@amd.com */ 115313570Sbrandon.potter@amd.com fdsBuf.copyOut(tc->getMemProxy()); 115413570Sbrandon.potter@amd.com 115513570Sbrandon.potter@amd.com return status; 115613570Sbrandon.potter@amd.com} 11571999SN/A 11581999SN/A/// Target fchmod() handler. 11591999SN/Atemplate <class OS> 11601999SN/ASyscallReturn 116111856Sbrandon.potter@amd.comfchmodFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 11621999SN/A{ 11636701Sgblack@eecs.umich.edu int index = 0; 116411856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 116511856Sbrandon.potter@amd.com uint32_t mode = p->getSyscallArg(tc, index); 116610931Sbrandon.potter@amd.com 116711856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 116811856Sbrandon.potter@amd.com if (!ffdp) 11691999SN/A return -EBADF; 117011856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 11711999SN/A 117211856Sbrandon.potter@amd.com mode_t hostMode = mode; 11731999SN/A 117411856Sbrandon.potter@amd.com int result = fchmod(sim_fd, hostMode); 11751999SN/A 117611856Sbrandon.potter@amd.com return (result < 0) ? -errno : 0; 11771999SN/A} 11781999SN/A 11795877Shsul@eecs.umich.edu/// Target mremap() handler. 11805877Shsul@eecs.umich.edutemplate <class OS> 11815877Shsul@eecs.umich.eduSyscallReturn 118211851Sbrandon.potter@amd.commremapFunc(SyscallDesc *desc, int callnum, Process *process, ThreadContext *tc) 11835877Shsul@eecs.umich.edu{ 11846701Sgblack@eecs.umich.edu int index = 0; 11856701Sgblack@eecs.umich.edu Addr start = process->getSyscallArg(tc, index); 11866701Sgblack@eecs.umich.edu uint64_t old_length = process->getSyscallArg(tc, index); 11876701Sgblack@eecs.umich.edu uint64_t new_length = process->getSyscallArg(tc, index); 11886701Sgblack@eecs.umich.edu uint64_t flags = process->getSyscallArg(tc, index); 118910027SChris.Adeniyi-Jones@arm.com uint64_t provided_address = 0; 119010027SChris.Adeniyi-Jones@arm.com bool use_provided_address = flags & OS::TGT_MREMAP_FIXED; 119110027SChris.Adeniyi-Jones@arm.com 119210027SChris.Adeniyi-Jones@arm.com if (use_provided_address) 119310027SChris.Adeniyi-Jones@arm.com provided_address = process->getSyscallArg(tc, index); 11945877Shsul@eecs.umich.edu 119510318Sandreas.hansson@arm.com if ((start % TheISA::PageBytes != 0) || 119610318Sandreas.hansson@arm.com (provided_address % TheISA::PageBytes != 0)) { 11975877Shsul@eecs.umich.edu warn("mremap failing: arguments not page aligned"); 11985877Shsul@eecs.umich.edu return -EINVAL; 11995877Shsul@eecs.umich.edu } 12005877Shsul@eecs.umich.edu 120110486Stjablin@gmail.com new_length = roundUp(new_length, TheISA::PageBytes); 120210486Stjablin@gmail.com 12035877Shsul@eecs.umich.edu if (new_length > old_length) { 120411905SBrandon.Potter@amd.com std::shared_ptr<MemState> mem_state = process->memState; 120511905SBrandon.Potter@amd.com Addr mmap_end = mem_state->getMmapEnd(); 120611905SBrandon.Potter@amd.com 120711905SBrandon.Potter@amd.com if ((start + old_length) == mmap_end && 120810027SChris.Adeniyi-Jones@arm.com (!use_provided_address || provided_address == start)) { 120912206Srico.amslinger@informatik.uni-augsburg.de // This case cannot occur when growing downward, as 121012206Srico.amslinger@informatik.uni-augsburg.de // start is greater than or equal to mmap_end. 12115877Shsul@eecs.umich.edu uint64_t diff = new_length - old_length; 121211905SBrandon.Potter@amd.com process->allocateMem(mmap_end, diff); 121311905SBrandon.Potter@amd.com mem_state->setMmapEnd(mmap_end + diff); 12145877Shsul@eecs.umich.edu return start; 12155877Shsul@eecs.umich.edu } else { 121610027SChris.Adeniyi-Jones@arm.com if (!use_provided_address && !(flags & OS::TGT_MREMAP_MAYMOVE)) { 12175877Shsul@eecs.umich.edu warn("can't remap here and MREMAP_MAYMOVE flag not set\n"); 12185877Shsul@eecs.umich.edu return -ENOMEM; 12195877Shsul@eecs.umich.edu } else { 122012206Srico.amslinger@informatik.uni-augsburg.de uint64_t new_start = provided_address; 122112206Srico.amslinger@informatik.uni-augsburg.de if (!use_provided_address) { 122212206Srico.amslinger@informatik.uni-augsburg.de new_start = process->mmapGrowsDown() ? 122312206Srico.amslinger@informatik.uni-augsburg.de mmap_end - new_length : mmap_end; 122412206Srico.amslinger@informatik.uni-augsburg.de mmap_end = process->mmapGrowsDown() ? 122512206Srico.amslinger@informatik.uni-augsburg.de new_start : mmap_end + new_length; 122612206Srico.amslinger@informatik.uni-augsburg.de mem_state->setMmapEnd(mmap_end); 122712206Srico.amslinger@informatik.uni-augsburg.de } 122812206Srico.amslinger@informatik.uni-augsburg.de 122910027SChris.Adeniyi-Jones@arm.com process->pTable->remap(start, old_length, new_start); 123010027SChris.Adeniyi-Jones@arm.com warn("mremapping to new vaddr %08p-%08p, adding %d\n", 123110027SChris.Adeniyi-Jones@arm.com new_start, new_start + new_length, 123210027SChris.Adeniyi-Jones@arm.com new_length - old_length); 12335877Shsul@eecs.umich.edu // add on the remaining unallocated pages 123410027SChris.Adeniyi-Jones@arm.com process->allocateMem(new_start + old_length, 123510027SChris.Adeniyi-Jones@arm.com new_length - old_length, 123610027SChris.Adeniyi-Jones@arm.com use_provided_address /* clobber */); 123710027SChris.Adeniyi-Jones@arm.com if (use_provided_address && 123812206Srico.amslinger@informatik.uni-augsburg.de ((new_start + new_length > mem_state->getMmapEnd() && 123912206Srico.amslinger@informatik.uni-augsburg.de !process->mmapGrowsDown()) || 124012206Srico.amslinger@informatik.uni-augsburg.de (new_start < mem_state->getMmapEnd() && 124112206Srico.amslinger@informatik.uni-augsburg.de process->mmapGrowsDown()))) { 124210027SChris.Adeniyi-Jones@arm.com // something fishy going on here, at least notify the user 124310027SChris.Adeniyi-Jones@arm.com // @todo: increase mmap_end? 124410027SChris.Adeniyi-Jones@arm.com warn("mmap region limit exceeded with MREMAP_FIXED\n"); 124510027SChris.Adeniyi-Jones@arm.com } 124610027SChris.Adeniyi-Jones@arm.com warn("returning %08p as start\n", new_start); 124710027SChris.Adeniyi-Jones@arm.com return new_start; 12485877Shsul@eecs.umich.edu } 12495877Shsul@eecs.umich.edu } 12505877Shsul@eecs.umich.edu } else { 125110027SChris.Adeniyi-Jones@arm.com if (use_provided_address && provided_address != start) 125210027SChris.Adeniyi-Jones@arm.com process->pTable->remap(start, new_length, provided_address); 12538601Ssteve.reinhardt@amd.com process->pTable->unmap(start + new_length, old_length - new_length); 125410027SChris.Adeniyi-Jones@arm.com return use_provided_address ? provided_address : start; 12555877Shsul@eecs.umich.edu } 12565877Shsul@eecs.umich.edu} 12571999SN/A 1258378SN/A/// Target stat() handler. 1259360SN/Atemplate <class OS> 12601450SN/ASyscallReturn 126111851Sbrandon.potter@amd.comstatFunc(SyscallDesc *desc, int callnum, Process *process, 12622680Sktlim@umich.edu ThreadContext *tc) 1263360SN/A{ 1264360SN/A std::string path; 1265360SN/A 12666701Sgblack@eecs.umich.edu int index = 0; 12678852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 12686701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 12696701Sgblack@eecs.umich.edu return -EFAULT; 12706701Sgblack@eecs.umich.edu } 12716701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 1272360SN/A 127313883Sdavid.hashe@amd.com // Adjust path for cwd and redirection 127413883Sdavid.hashe@amd.com path = process->checkPathRedirect(path); 12753669Sbinkertn@umich.edu 1276360SN/A struct stat hostBuf; 1277360SN/A int result = stat(path.c_str(), &hostBuf); 1278360SN/A 1279360SN/A if (result < 0) 12802218SN/A return -errno; 1281360SN/A 12828706Sandreas.hansson@arm.com copyOutStatBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 1283360SN/A 12841458SN/A return 0; 1285360SN/A} 1286360SN/A 1287360SN/A 12885074Ssaidi@eecs.umich.edu/// Target stat64() handler. 12895074Ssaidi@eecs.umich.edutemplate <class OS> 12905074Ssaidi@eecs.umich.eduSyscallReturn 129111851Sbrandon.potter@amd.comstat64Func(SyscallDesc *desc, int callnum, Process *process, 12925074Ssaidi@eecs.umich.edu ThreadContext *tc) 12935074Ssaidi@eecs.umich.edu{ 12945074Ssaidi@eecs.umich.edu std::string path; 12955074Ssaidi@eecs.umich.edu 12966701Sgblack@eecs.umich.edu int index = 0; 12978852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 12986701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) 12995074Ssaidi@eecs.umich.edu return -EFAULT; 13006701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 13015074Ssaidi@eecs.umich.edu 130213883Sdavid.hashe@amd.com // Adjust path for cwd and redirection 130313883Sdavid.hashe@amd.com path = process->checkPathRedirect(path); 13045074Ssaidi@eecs.umich.edu 13055208Ssaidi@eecs.umich.edu#if NO_STAT64 13065208Ssaidi@eecs.umich.edu struct stat hostBuf; 13075208Ssaidi@eecs.umich.edu int result = stat(path.c_str(), &hostBuf); 13085208Ssaidi@eecs.umich.edu#else 13095074Ssaidi@eecs.umich.edu struct stat64 hostBuf; 13105074Ssaidi@eecs.umich.edu int result = stat64(path.c_str(), &hostBuf); 13115208Ssaidi@eecs.umich.edu#endif 13125074Ssaidi@eecs.umich.edu 13135074Ssaidi@eecs.umich.edu if (result < 0) 13145074Ssaidi@eecs.umich.edu return -errno; 13155074Ssaidi@eecs.umich.edu 13168706Sandreas.hansson@arm.com copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 13175074Ssaidi@eecs.umich.edu 13185074Ssaidi@eecs.umich.edu return 0; 13195074Ssaidi@eecs.umich.edu} 13205074Ssaidi@eecs.umich.edu 13215074Ssaidi@eecs.umich.edu 132210027SChris.Adeniyi-Jones@arm.com/// Target fstatat64() handler. 132310027SChris.Adeniyi-Jones@arm.comtemplate <class OS> 132410027SChris.Adeniyi-Jones@arm.comSyscallReturn 132511851Sbrandon.potter@amd.comfstatat64Func(SyscallDesc *desc, int callnum, Process *process, 132610027SChris.Adeniyi-Jones@arm.com ThreadContext *tc) 132710027SChris.Adeniyi-Jones@arm.com{ 132810027SChris.Adeniyi-Jones@arm.com int index = 0; 132910027SChris.Adeniyi-Jones@arm.com int dirfd = process->getSyscallArg(tc, index); 133010027SChris.Adeniyi-Jones@arm.com if (dirfd != OS::TGT_AT_FDCWD) 133110793Sbrandon.potter@amd.com warn("fstatat64: first argument not AT_FDCWD; unlikely to work"); 133210027SChris.Adeniyi-Jones@arm.com 133310027SChris.Adeniyi-Jones@arm.com std::string path; 133410027SChris.Adeniyi-Jones@arm.com if (!tc->getMemProxy().tryReadString(path, 133510027SChris.Adeniyi-Jones@arm.com process->getSyscallArg(tc, index))) 133610027SChris.Adeniyi-Jones@arm.com return -EFAULT; 133710027SChris.Adeniyi-Jones@arm.com Addr bufPtr = process->getSyscallArg(tc, index); 133810027SChris.Adeniyi-Jones@arm.com 133913883Sdavid.hashe@amd.com // Adjust path for cwd and redirection 134013883Sdavid.hashe@amd.com path = process->checkPathRedirect(path); 134110027SChris.Adeniyi-Jones@arm.com 134210027SChris.Adeniyi-Jones@arm.com#if NO_STAT64 134310027SChris.Adeniyi-Jones@arm.com struct stat hostBuf; 134410027SChris.Adeniyi-Jones@arm.com int result = stat(path.c_str(), &hostBuf); 134510027SChris.Adeniyi-Jones@arm.com#else 134610027SChris.Adeniyi-Jones@arm.com struct stat64 hostBuf; 134710027SChris.Adeniyi-Jones@arm.com int result = stat64(path.c_str(), &hostBuf); 134810027SChris.Adeniyi-Jones@arm.com#endif 134910027SChris.Adeniyi-Jones@arm.com 135010027SChris.Adeniyi-Jones@arm.com if (result < 0) 135110027SChris.Adeniyi-Jones@arm.com return -errno; 135210027SChris.Adeniyi-Jones@arm.com 135310027SChris.Adeniyi-Jones@arm.com copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 135410027SChris.Adeniyi-Jones@arm.com 135510027SChris.Adeniyi-Jones@arm.com return 0; 135610027SChris.Adeniyi-Jones@arm.com} 135710027SChris.Adeniyi-Jones@arm.com 135810027SChris.Adeniyi-Jones@arm.com 13591999SN/A/// Target fstat64() handler. 13601999SN/Atemplate <class OS> 13611999SN/ASyscallReturn 136211856Sbrandon.potter@amd.comfstat64Func(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 13631999SN/A{ 13646701Sgblack@eecs.umich.edu int index = 0; 136511856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 136611856Sbrandon.potter@amd.com Addr bufPtr = p->getSyscallArg(tc, index); 136710931Sbrandon.potter@amd.com 136811856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 136911856Sbrandon.potter@amd.com if (!ffdp) 13701999SN/A return -EBADF; 137111856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 13721999SN/A 13732764Sstever@eecs.umich.edu#if NO_STAT64 13742064SN/A struct stat hostBuf; 137510931Sbrandon.potter@amd.com int result = fstat(sim_fd, &hostBuf); 13762064SN/A#else 13772064SN/A struct stat64 hostBuf; 137810931Sbrandon.potter@amd.com int result = fstat64(sim_fd, &hostBuf); 13792064SN/A#endif 13801999SN/A 13811999SN/A if (result < 0) 13822218SN/A return -errno; 13831999SN/A 138410931Sbrandon.potter@amd.com copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf, (sim_fd == 1)); 13851999SN/A 13861999SN/A return 0; 13871999SN/A} 13881999SN/A 13891999SN/A 1390378SN/A/// Target lstat() handler. 1391360SN/Atemplate <class OS> 13921450SN/ASyscallReturn 139311851Sbrandon.potter@amd.comlstatFunc(SyscallDesc *desc, int callnum, Process *process, 13942680Sktlim@umich.edu ThreadContext *tc) 1395360SN/A{ 1396360SN/A std::string path; 1397360SN/A 13986701Sgblack@eecs.umich.edu int index = 0; 13998852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 14006701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 14016701Sgblack@eecs.umich.edu return -EFAULT; 14026701Sgblack@eecs.umich.edu } 14036701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 1404360SN/A 140513883Sdavid.hashe@amd.com // Adjust path for cwd and redirection 140613883Sdavid.hashe@amd.com path = process->checkPathRedirect(path); 14073669Sbinkertn@umich.edu 1408360SN/A struct stat hostBuf; 1409360SN/A int result = lstat(path.c_str(), &hostBuf); 1410360SN/A 1411360SN/A if (result < 0) 14121458SN/A return -errno; 1413360SN/A 14148706Sandreas.hansson@arm.com copyOutStatBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 1415360SN/A 14161458SN/A return 0; 1417360SN/A} 1418360SN/A 14191999SN/A/// Target lstat64() handler. 14201999SN/Atemplate <class OS> 14211999SN/ASyscallReturn 142211851Sbrandon.potter@amd.comlstat64Func(SyscallDesc *desc, int callnum, Process *process, 14232680Sktlim@umich.edu ThreadContext *tc) 14241999SN/A{ 14251999SN/A std::string path; 14261999SN/A 14276701Sgblack@eecs.umich.edu int index = 0; 14288852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 14296701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 14306701Sgblack@eecs.umich.edu return -EFAULT; 14316701Sgblack@eecs.umich.edu } 14326701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 14331999SN/A 143413883Sdavid.hashe@amd.com // Adjust path for cwd and redirection 143513883Sdavid.hashe@amd.com path = process->checkPathRedirect(path); 14363669Sbinkertn@umich.edu 14372764Sstever@eecs.umich.edu#if NO_STAT64 14382064SN/A struct stat hostBuf; 14392064SN/A int result = lstat(path.c_str(), &hostBuf); 14402064SN/A#else 14411999SN/A struct stat64 hostBuf; 14421999SN/A int result = lstat64(path.c_str(), &hostBuf); 14432064SN/A#endif 14441999SN/A 14451999SN/A if (result < 0) 14461999SN/A return -errno; 14471999SN/A 14488706Sandreas.hansson@arm.com copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 14491999SN/A 14501999SN/A return 0; 14511999SN/A} 14521999SN/A 1453378SN/A/// Target fstat() handler. 1454360SN/Atemplate <class OS> 14551450SN/ASyscallReturn 145611856Sbrandon.potter@amd.comfstatFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 1457360SN/A{ 14586701Sgblack@eecs.umich.edu int index = 0; 145911856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 146011856Sbrandon.potter@amd.com Addr bufPtr = p->getSyscallArg(tc, index); 1461360SN/A 146211380Salexandru.dutu@amd.com DPRINTF_SYSCALL(Verbose, "fstat(%d, ...)\n", tgt_fd); 1463360SN/A 146411856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 146511856Sbrandon.potter@amd.com if (!ffdp) 14661458SN/A return -EBADF; 146711856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 1468360SN/A 1469360SN/A struct stat hostBuf; 147010931Sbrandon.potter@amd.com int result = fstat(sim_fd, &hostBuf); 1471360SN/A 1472360SN/A if (result < 0) 14731458SN/A return -errno; 1474360SN/A 147510931Sbrandon.potter@amd.com copyOutStatBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf, (sim_fd == 1)); 14762021SN/A 14771458SN/A return 0; 1478360SN/A} 1479360SN/A 14801706SN/A/// Target statfs() handler. 14811706SN/Atemplate <class OS> 14821706SN/ASyscallReturn 148311851Sbrandon.potter@amd.comstatfsFunc(SyscallDesc *desc, int callnum, Process *process, 14842680Sktlim@umich.edu ThreadContext *tc) 14851706SN/A{ 148611799Sbrandon.potter@amd.com#if NO_STATFS 148711799Sbrandon.potter@amd.com warn("Host OS cannot support calls to statfs. Ignoring syscall"); 148811799Sbrandon.potter@amd.com#else 14891706SN/A std::string path; 14901706SN/A 14916701Sgblack@eecs.umich.edu int index = 0; 14928852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 14936701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 14946701Sgblack@eecs.umich.edu return -EFAULT; 14956701Sgblack@eecs.umich.edu } 14966701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 14971706SN/A 149813883Sdavid.hashe@amd.com // Adjust path for cwd and redirection 149913883Sdavid.hashe@amd.com path = process->checkPathRedirect(path); 15003669Sbinkertn@umich.edu 15011706SN/A struct statfs hostBuf; 15021706SN/A int result = statfs(path.c_str(), &hostBuf); 15031706SN/A 15041706SN/A if (result < 0) 15052218SN/A return -errno; 15061706SN/A 150711759Sbrandon.potter@amd.com copyOutStatfsBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 150811799Sbrandon.potter@amd.com#endif 15091706SN/A return 0; 15101706SN/A} 15111706SN/A 151211886Sbrandon.potter@amd.comtemplate <class OS> 151311886Sbrandon.potter@amd.comSyscallReturn 151411886Sbrandon.potter@amd.comcloneFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 151511886Sbrandon.potter@amd.com{ 151611886Sbrandon.potter@amd.com int index = 0; 151712426Sqtt2@cornell.edu 151813557Sgabeblack@google.com RegVal flags = p->getSyscallArg(tc, index); 151913557Sgabeblack@google.com RegVal newStack = p->getSyscallArg(tc, index); 152011886Sbrandon.potter@amd.com Addr ptidPtr = p->getSyscallArg(tc, index); 152112426Sqtt2@cornell.edu 152213534Sandreas.sandberg@arm.com#if THE_ISA == RISCV_ISA or THE_ISA == ARM_ISA 152312426Sqtt2@cornell.edu /** 152413534Sandreas.sandberg@arm.com * Linux sets CLONE_BACKWARDS flag for RISC-V and Arm. 152512426Sqtt2@cornell.edu * The flag defines the list of clone() arguments in the following 152612426Sqtt2@cornell.edu * order: flags -> newStack -> ptidPtr -> tlsPtr -> ctidPtr 152712426Sqtt2@cornell.edu */ 152813536Sandreas.sandberg@arm.com Addr tlsPtr = p->getSyscallArg(tc, index); 152912426Sqtt2@cornell.edu Addr ctidPtr = p->getSyscallArg(tc, index); 153012426Sqtt2@cornell.edu#else 153111886Sbrandon.potter@amd.com Addr ctidPtr = p->getSyscallArg(tc, index); 153213536Sandreas.sandberg@arm.com Addr tlsPtr = p->getSyscallArg(tc, index); 153312426Sqtt2@cornell.edu#endif 153411886Sbrandon.potter@amd.com 153511886Sbrandon.potter@amd.com if (((flags & OS::TGT_CLONE_SIGHAND)&& !(flags & OS::TGT_CLONE_VM)) || 153611886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_THREAD) && !(flags & OS::TGT_CLONE_SIGHAND)) || 153711886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_FS) && (flags & OS::TGT_CLONE_NEWNS)) || 153811886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_NEWIPC) && (flags & OS::TGT_CLONE_SYSVSEM)) || 153911886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_NEWPID) && (flags & OS::TGT_CLONE_THREAD)) || 154011886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_VM) && !(newStack))) 154111886Sbrandon.potter@amd.com return -EINVAL; 154211886Sbrandon.potter@amd.com 154311886Sbrandon.potter@amd.com ThreadContext *ctc; 154413649Sqtt2@cornell.edu if (!(ctc = p->findFreeContext())) { 154513649Sqtt2@cornell.edu DPRINTF_SYSCALL(Verbose, "clone: no spare thread context in system" 154613649Sqtt2@cornell.edu "[cpu %d, thread %d]", tc->cpuId(), tc->threadId()); 154713649Sqtt2@cornell.edu return -EAGAIN; 154813649Sqtt2@cornell.edu } 154911886Sbrandon.potter@amd.com 155011886Sbrandon.potter@amd.com /** 155111886Sbrandon.potter@amd.com * Note that ProcessParams is generated by swig and there are no other 155211886Sbrandon.potter@amd.com * examples of how to create anything but this default constructor. The 155311886Sbrandon.potter@amd.com * fields are manually initialized instead of passing parameters to the 155411886Sbrandon.potter@amd.com * constructor. 155511886Sbrandon.potter@amd.com */ 155611886Sbrandon.potter@amd.com ProcessParams *pp = new ProcessParams(); 155711886Sbrandon.potter@amd.com pp->executable.assign(*(new std::string(p->progName()))); 155811886Sbrandon.potter@amd.com pp->cmd.push_back(*(new std::string(p->progName()))); 155911886Sbrandon.potter@amd.com pp->system = p->system; 156013883Sdavid.hashe@amd.com pp->cwd.assign(p->tgtCwd); 156111886Sbrandon.potter@amd.com pp->input.assign("stdin"); 156211886Sbrandon.potter@amd.com pp->output.assign("stdout"); 156311886Sbrandon.potter@amd.com pp->errout.assign("stderr"); 156411886Sbrandon.potter@amd.com pp->uid = p->uid(); 156511886Sbrandon.potter@amd.com pp->euid = p->euid(); 156611886Sbrandon.potter@amd.com pp->gid = p->gid(); 156711886Sbrandon.potter@amd.com pp->egid = p->egid(); 156811886Sbrandon.potter@amd.com 156911886Sbrandon.potter@amd.com /* Find the first free PID that's less than the maximum */ 157011886Sbrandon.potter@amd.com std::set<int> const& pids = p->system->PIDs; 157111886Sbrandon.potter@amd.com int temp_pid = *pids.begin(); 157211886Sbrandon.potter@amd.com do { 157311886Sbrandon.potter@amd.com temp_pid++; 157411886Sbrandon.potter@amd.com } while (pids.find(temp_pid) != pids.end()); 157511886Sbrandon.potter@amd.com if (temp_pid >= System::maxPID) 157611886Sbrandon.potter@amd.com fatal("temp_pid is too large: %d", temp_pid); 157711886Sbrandon.potter@amd.com 157811886Sbrandon.potter@amd.com pp->pid = temp_pid; 157911886Sbrandon.potter@amd.com pp->ppid = (flags & OS::TGT_CLONE_THREAD) ? p->ppid() : p->pid(); 158013867Salexandru.dutu@amd.com pp->useArchPT = p->useArchPT; 158113867Salexandru.dutu@amd.com pp->kvmInSE = p->kvmInSE; 158211886Sbrandon.potter@amd.com Process *cp = pp->create(); 158311886Sbrandon.potter@amd.com delete pp; 158411886Sbrandon.potter@amd.com 158511886Sbrandon.potter@amd.com Process *owner = ctc->getProcessPtr(); 158611886Sbrandon.potter@amd.com ctc->setProcessPtr(cp); 158711886Sbrandon.potter@amd.com cp->assignThreadContext(ctc->contextId()); 158811886Sbrandon.potter@amd.com owner->revokeThreadContext(ctc->contextId()); 158911886Sbrandon.potter@amd.com 159011886Sbrandon.potter@amd.com if (flags & OS::TGT_CLONE_PARENT_SETTID) { 159111886Sbrandon.potter@amd.com BufferArg ptidBuf(ptidPtr, sizeof(long)); 159211886Sbrandon.potter@amd.com long *ptid = (long *)ptidBuf.bufferPtr(); 159311886Sbrandon.potter@amd.com *ptid = cp->pid(); 159411886Sbrandon.potter@amd.com ptidBuf.copyOut(tc->getMemProxy()); 159511886Sbrandon.potter@amd.com } 159611886Sbrandon.potter@amd.com 159713867Salexandru.dutu@amd.com if (flags & OS::TGT_CLONE_THREAD) { 159813867Salexandru.dutu@amd.com cp->pTable->shared = true; 159913867Salexandru.dutu@amd.com cp->useForClone = true; 160013867Salexandru.dutu@amd.com } 160111886Sbrandon.potter@amd.com cp->initState(); 160211886Sbrandon.potter@amd.com p->clone(tc, ctc, cp, flags); 160311886Sbrandon.potter@amd.com 160411911SBrandon.Potter@amd.com if (flags & OS::TGT_CLONE_THREAD) { 160511911SBrandon.Potter@amd.com delete cp->sigchld; 160611911SBrandon.Potter@amd.com cp->sigchld = p->sigchld; 160711911SBrandon.Potter@amd.com } else if (flags & OS::TGT_SIGCHLD) { 160811911SBrandon.Potter@amd.com *cp->sigchld = true; 160911911SBrandon.Potter@amd.com } 161011911SBrandon.Potter@amd.com 161111886Sbrandon.potter@amd.com if (flags & OS::TGT_CLONE_CHILD_SETTID) { 161211886Sbrandon.potter@amd.com BufferArg ctidBuf(ctidPtr, sizeof(long)); 161311886Sbrandon.potter@amd.com long *ctid = (long *)ctidBuf.bufferPtr(); 161411886Sbrandon.potter@amd.com *ctid = cp->pid(); 161511886Sbrandon.potter@amd.com ctidBuf.copyOut(ctc->getMemProxy()); 161611886Sbrandon.potter@amd.com } 161711886Sbrandon.potter@amd.com 161811886Sbrandon.potter@amd.com if (flags & OS::TGT_CLONE_CHILD_CLEARTID) 161911886Sbrandon.potter@amd.com cp->childClearTID = (uint64_t)ctidPtr; 162011886Sbrandon.potter@amd.com 162111886Sbrandon.potter@amd.com ctc->clearArchRegs(); 162211886Sbrandon.potter@amd.com 162313536Sandreas.sandberg@arm.com OS::archClone(flags, p, cp, tc, ctc, newStack, tlsPtr); 162411886Sbrandon.potter@amd.com 162511886Sbrandon.potter@amd.com cp->setSyscallReturn(ctc, 0); 162611886Sbrandon.potter@amd.com 162711886Sbrandon.potter@amd.com#if THE_ISA == ALPHA_ISA 162811886Sbrandon.potter@amd.com ctc->setIntReg(TheISA::SyscallSuccessReg, 0); 162911886Sbrandon.potter@amd.com#elif THE_ISA == SPARC_ISA 163011886Sbrandon.potter@amd.com tc->setIntReg(TheISA::SyscallPseudoReturnReg, 0); 163111886Sbrandon.potter@amd.com ctc->setIntReg(TheISA::SyscallPseudoReturnReg, 1); 163211886Sbrandon.potter@amd.com#endif 163311886Sbrandon.potter@amd.com 163413867Salexandru.dutu@amd.com if (p->kvmInSE) { 163513867Salexandru.dutu@amd.com#if THE_ISA == X86_ISA 163613867Salexandru.dutu@amd.com ctc->pcState(tc->readIntReg(TheISA::INTREG_RCX)); 163713867Salexandru.dutu@amd.com#else 163813867Salexandru.dutu@amd.com panic("KVM CPU model is not supported for this ISA"); 163913867Salexandru.dutu@amd.com#endif 164013867Salexandru.dutu@amd.com } else { 164113867Salexandru.dutu@amd.com TheISA::PCState cpc = tc->pcState(); 164213867Salexandru.dutu@amd.com cpc.advance(); 164313867Salexandru.dutu@amd.com ctc->pcState(cpc); 164413867Salexandru.dutu@amd.com } 164511886Sbrandon.potter@amd.com ctc->activate(); 164611886Sbrandon.potter@amd.com 164711886Sbrandon.potter@amd.com return cp->pid(); 164811886Sbrandon.potter@amd.com} 16491706SN/A 16501706SN/A/// Target fstatfs() handler. 16511706SN/Atemplate <class OS> 16521706SN/ASyscallReturn 165311856Sbrandon.potter@amd.comfstatfsFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 16541706SN/A{ 16556701Sgblack@eecs.umich.edu int index = 0; 165611856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 165711856Sbrandon.potter@amd.com Addr bufPtr = p->getSyscallArg(tc, index); 16581706SN/A 165911856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 166011856Sbrandon.potter@amd.com if (!ffdp) 16611706SN/A return -EBADF; 166211856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 16631706SN/A 16641706SN/A struct statfs hostBuf; 166510931Sbrandon.potter@amd.com int result = fstatfs(sim_fd, &hostBuf); 16661706SN/A 16671706SN/A if (result < 0) 16682218SN/A return -errno; 16691706SN/A 167011759Sbrandon.potter@amd.com copyOutStatfsBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 16711706SN/A 16721706SN/A return 0; 16731706SN/A} 16741706SN/A 167513572Sbrandon.potter@amd.com/// Target readv() handler. 167613572Sbrandon.potter@amd.comtemplate <class OS> 167713572Sbrandon.potter@amd.comSyscallReturn 167813572Sbrandon.potter@amd.comreadvFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 167913572Sbrandon.potter@amd.com{ 168013572Sbrandon.potter@amd.com int index = 0; 168113572Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 168213572Sbrandon.potter@amd.com 168313572Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 168413572Sbrandon.potter@amd.com if (!ffdp) 168513572Sbrandon.potter@amd.com return -EBADF; 168613572Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 168713572Sbrandon.potter@amd.com 168813572Sbrandon.potter@amd.com SETranslatingPortProxy &prox = tc->getMemProxy(); 168913572Sbrandon.potter@amd.com uint64_t tiov_base = p->getSyscallArg(tc, index); 169013572Sbrandon.potter@amd.com size_t count = p->getSyscallArg(tc, index); 169113572Sbrandon.potter@amd.com typename OS::tgt_iovec tiov[count]; 169213572Sbrandon.potter@amd.com struct iovec hiov[count]; 169313572Sbrandon.potter@amd.com for (size_t i = 0; i < count; ++i) { 169413572Sbrandon.potter@amd.com prox.readBlob(tiov_base + (i * sizeof(typename OS::tgt_iovec)), 169513572Sbrandon.potter@amd.com (uint8_t*)&tiov[i], sizeof(typename OS::tgt_iovec)); 169613572Sbrandon.potter@amd.com hiov[i].iov_len = TheISA::gtoh(tiov[i].iov_len); 169713572Sbrandon.potter@amd.com hiov[i].iov_base = new char [hiov[i].iov_len]; 169813572Sbrandon.potter@amd.com } 169913572Sbrandon.potter@amd.com 170013572Sbrandon.potter@amd.com int result = readv(sim_fd, hiov, count); 170113572Sbrandon.potter@amd.com int local_errno = errno; 170213572Sbrandon.potter@amd.com 170313572Sbrandon.potter@amd.com for (size_t i = 0; i < count; ++i) { 170413572Sbrandon.potter@amd.com if (result != -1) { 170513572Sbrandon.potter@amd.com prox.writeBlob(TheISA::htog(tiov[i].iov_base), 170613572Sbrandon.potter@amd.com (uint8_t*)hiov[i].iov_base, hiov[i].iov_len); 170713572Sbrandon.potter@amd.com } 170813572Sbrandon.potter@amd.com delete [] (char *)hiov[i].iov_base; 170913572Sbrandon.potter@amd.com } 171013572Sbrandon.potter@amd.com 171113572Sbrandon.potter@amd.com return (result == -1) ? -local_errno : result; 171213572Sbrandon.potter@amd.com} 17131706SN/A 17141999SN/A/// Target writev() handler. 17151999SN/Atemplate <class OS> 17161999SN/ASyscallReturn 171711856Sbrandon.potter@amd.comwritevFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 17181999SN/A{ 17196701Sgblack@eecs.umich.edu int index = 0; 172011856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 172110931Sbrandon.potter@amd.com 172211856Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 172311856Sbrandon.potter@amd.com if (!hbfdp) 17241999SN/A return -EBADF; 172511856Sbrandon.potter@amd.com int sim_fd = hbfdp->getSimFD(); 17261999SN/A 172711856Sbrandon.potter@amd.com SETranslatingPortProxy &prox = tc->getMemProxy(); 172811856Sbrandon.potter@amd.com uint64_t tiov_base = p->getSyscallArg(tc, index); 172911856Sbrandon.potter@amd.com size_t count = p->getSyscallArg(tc, index); 17301999SN/A struct iovec hiov[count]; 17316227Snate@binkert.org for (size_t i = 0; i < count; ++i) { 17321999SN/A typename OS::tgt_iovec tiov; 17332461SN/A 173411856Sbrandon.potter@amd.com prox.readBlob(tiov_base + i*sizeof(typename OS::tgt_iovec), 173511856Sbrandon.potter@amd.com (uint8_t*)&tiov, sizeof(typename OS::tgt_iovec)); 17368737Skoansin.tan@gmail.com hiov[i].iov_len = TheISA::gtoh(tiov.iov_len); 17371999SN/A hiov[i].iov_base = new char [hiov[i].iov_len]; 173811856Sbrandon.potter@amd.com prox.readBlob(TheISA::gtoh(tiov.iov_base), (uint8_t *)hiov[i].iov_base, 173911856Sbrandon.potter@amd.com hiov[i].iov_len); 17401999SN/A } 17411999SN/A 174210931Sbrandon.potter@amd.com int result = writev(sim_fd, hiov, count); 17431999SN/A 17446227Snate@binkert.org for (size_t i = 0; i < count; ++i) 17451999SN/A delete [] (char *)hiov[i].iov_base; 17461999SN/A 174713572Sbrandon.potter@amd.com return (result == -1) ? -errno : result; 17481999SN/A} 17491999SN/A 175011385Sbrandon.potter@amd.com/// Real mmap handler. 1751360SN/Atemplate <class OS> 17521450SN/ASyscallReturn 175311851Sbrandon.potter@amd.commmapImpl(SyscallDesc *desc, int num, Process *p, ThreadContext *tc, 175411385Sbrandon.potter@amd.com bool is_mmap2) 1755360SN/A{ 17566701Sgblack@eecs.umich.edu int index = 0; 17576701Sgblack@eecs.umich.edu Addr start = p->getSyscallArg(tc, index); 17586701Sgblack@eecs.umich.edu uint64_t length = p->getSyscallArg(tc, index); 175911383Sbrandon.potter@amd.com int prot = p->getSyscallArg(tc, index); 176011383Sbrandon.potter@amd.com int tgt_flags = p->getSyscallArg(tc, index); 17618324Ssteve.reinhardt@amd.com int tgt_fd = p->getSyscallArg(tc, index); 176210486Stjablin@gmail.com int offset = p->getSyscallArg(tc, index); 1763360SN/A 176411385Sbrandon.potter@amd.com if (is_mmap2) 176511385Sbrandon.potter@amd.com offset *= TheISA::PageBytes; 17669008Sgblack@eecs.umich.edu 176711383Sbrandon.potter@amd.com if (start & (TheISA::PageBytes - 1) || 176811383Sbrandon.potter@amd.com offset & (TheISA::PageBytes - 1) || 176911383Sbrandon.potter@amd.com (tgt_flags & OS::TGT_MAP_PRIVATE && 177011383Sbrandon.potter@amd.com tgt_flags & OS::TGT_MAP_SHARED) || 177111383Sbrandon.potter@amd.com (!(tgt_flags & OS::TGT_MAP_PRIVATE) && 177211383Sbrandon.potter@amd.com !(tgt_flags & OS::TGT_MAP_SHARED)) || 177311383Sbrandon.potter@amd.com !length) { 177411383Sbrandon.potter@amd.com return -EINVAL; 177511383Sbrandon.potter@amd.com } 17768324Ssteve.reinhardt@amd.com 177711383Sbrandon.potter@amd.com if ((prot & PROT_WRITE) && (tgt_flags & OS::TGT_MAP_SHARED)) { 177811383Sbrandon.potter@amd.com // With shared mmaps, there are two cases to consider: 177911383Sbrandon.potter@amd.com // 1) anonymous: writes should modify the mapping and this should be 178011383Sbrandon.potter@amd.com // visible to observers who share the mapping. Currently, it's 178111383Sbrandon.potter@amd.com // difficult to update the shared mapping because there's no 178211383Sbrandon.potter@amd.com // structure which maintains information about the which virtual 178311383Sbrandon.potter@amd.com // memory areas are shared. If that structure existed, it would be 178411383Sbrandon.potter@amd.com // possible to make the translations point to the same frames. 178511383Sbrandon.potter@amd.com // 2) file-backed: writes should modify the mapping and the file 178611383Sbrandon.potter@amd.com // which is backed by the mapping. The shared mapping problem is the 178711383Sbrandon.potter@amd.com // same as what was mentioned about the anonymous mappings. For 178811383Sbrandon.potter@amd.com // file-backed mappings, the writes to the file are difficult 178911383Sbrandon.potter@amd.com // because it requires syncing what the mapping holds with the file 179011383Sbrandon.potter@amd.com // that resides on the host system. So, any write on a real system 179111383Sbrandon.potter@amd.com // would cause the change to be propagated to the file mapping at 179211383Sbrandon.potter@amd.com // some point in the future (the inode is tracked along with the 179311383Sbrandon.potter@amd.com // mapping). This isn't guaranteed to always happen, but it usually 179411383Sbrandon.potter@amd.com // works well enough. The guarantee is provided by the msync system 179511383Sbrandon.potter@amd.com // call. We could force the change through with shared mappings with 179611383Sbrandon.potter@amd.com // a call to msync, but that again would require more information 179711383Sbrandon.potter@amd.com // than we currently maintain. 179811383Sbrandon.potter@amd.com warn("mmap: writing to shared mmap region is currently " 179911383Sbrandon.potter@amd.com "unsupported. The write succeeds on the target, but it " 180011383Sbrandon.potter@amd.com "will not be propagated to the host or shared mappings"); 18018324Ssteve.reinhardt@amd.com } 18025877Shsul@eecs.umich.edu 180310486Stjablin@gmail.com length = roundUp(length, TheISA::PageBytes); 180410486Stjablin@gmail.com 180511383Sbrandon.potter@amd.com int sim_fd = -1; 180611383Sbrandon.potter@amd.com uint8_t *pmap = nullptr; 180711383Sbrandon.potter@amd.com if (!(tgt_flags & OS::TGT_MAP_ANONYMOUS)) { 180811856Sbrandon.potter@amd.com std::shared_ptr<FDEntry> fdep = (*p->fds)[tgt_fd]; 180911624Smichael.lebeane@amd.com 181011856Sbrandon.potter@amd.com auto dfdp = std::dynamic_pointer_cast<DeviceFDEntry>(fdep); 181111856Sbrandon.potter@amd.com if (dfdp) { 181211856Sbrandon.potter@amd.com EmulatedDriver *emul_driver = dfdp->getDriver(); 181311856Sbrandon.potter@amd.com return emul_driver->mmap(p, tc, start, length, prot, 181411624Smichael.lebeane@amd.com tgt_flags, tgt_fd, offset); 181511624Smichael.lebeane@amd.com } 181611624Smichael.lebeane@amd.com 181711856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(fdep); 181811856Sbrandon.potter@amd.com if (!ffdp) 181911383Sbrandon.potter@amd.com return -EBADF; 182011856Sbrandon.potter@amd.com sim_fd = ffdp->getSimFD(); 1821360SN/A 182211913SBrandon.Potter@amd.com pmap = (decltype(pmap))mmap(nullptr, length, PROT_READ, MAP_PRIVATE, 182311383Sbrandon.potter@amd.com sim_fd, offset); 18248600Ssteve.reinhardt@amd.com 182511383Sbrandon.potter@amd.com if (pmap == (decltype(pmap))-1) { 182611383Sbrandon.potter@amd.com warn("mmap: failed to map file into host address space"); 182711383Sbrandon.potter@amd.com return -errno; 18288600Ssteve.reinhardt@amd.com } 18292544SN/A } 18302544SN/A 183111383Sbrandon.potter@amd.com // Extend global mmap region if necessary. Note that we ignore the 183211383Sbrandon.potter@amd.com // start address unless MAP_FIXED is specified. 183311383Sbrandon.potter@amd.com if (!(tgt_flags & OS::TGT_MAP_FIXED)) { 183411905SBrandon.Potter@amd.com std::shared_ptr<MemState> mem_state = p->memState; 183511905SBrandon.Potter@amd.com Addr mmap_end = mem_state->getMmapEnd(); 183611905SBrandon.Potter@amd.com 183711905SBrandon.Potter@amd.com start = p->mmapGrowsDown() ? mmap_end - length : mmap_end; 183811905SBrandon.Potter@amd.com mmap_end = p->mmapGrowsDown() ? start : mmap_end + length; 183911905SBrandon.Potter@amd.com 184011905SBrandon.Potter@amd.com mem_state->setMmapEnd(mmap_end); 184111383Sbrandon.potter@amd.com } 184211383Sbrandon.potter@amd.com 184311383Sbrandon.potter@amd.com DPRINTF_SYSCALL(Verbose, " mmap range is 0x%x - 0x%x\n", 184411383Sbrandon.potter@amd.com start, start + length - 1); 184511383Sbrandon.potter@amd.com 184611383Sbrandon.potter@amd.com // We only allow mappings to overwrite existing mappings if 184711383Sbrandon.potter@amd.com // TGT_MAP_FIXED is set. Otherwise it shouldn't be a problem 184811383Sbrandon.potter@amd.com // because we ignore the start hint if TGT_MAP_FIXED is not set. 184911383Sbrandon.potter@amd.com int clobber = tgt_flags & OS::TGT_MAP_FIXED; 185011383Sbrandon.potter@amd.com if (clobber) { 185111383Sbrandon.potter@amd.com for (auto tc : p->system->threadContexts) { 185211383Sbrandon.potter@amd.com // If we might be overwriting old mappings, we need to 185311383Sbrandon.potter@amd.com // invalidate potentially stale mappings out of the TLBs. 185411383Sbrandon.potter@amd.com tc->getDTBPtr()->flushAll(); 185511383Sbrandon.potter@amd.com tc->getITBPtr()->flushAll(); 18568600Ssteve.reinhardt@amd.com } 18576672Sgblack@eecs.umich.edu } 18588600Ssteve.reinhardt@amd.com 185911383Sbrandon.potter@amd.com // Allocate physical memory and map it in. If the page table is already 186011383Sbrandon.potter@amd.com // mapped and clobber is not set, the simulator will issue throw a 186111383Sbrandon.potter@amd.com // fatal and bail out of the simulation. 18628601Ssteve.reinhardt@amd.com p->allocateMem(start, length, clobber); 18632544SN/A 186411383Sbrandon.potter@amd.com // Transfer content into target address space. 186511383Sbrandon.potter@amd.com SETranslatingPortProxy &tp = tc->getMemProxy(); 186611383Sbrandon.potter@amd.com if (tgt_flags & OS::TGT_MAP_ANONYMOUS) { 186711383Sbrandon.potter@amd.com // In general, we should zero the mapped area for anonymous mappings, 186811383Sbrandon.potter@amd.com // with something like: 186911383Sbrandon.potter@amd.com // tp.memsetBlob(start, 0, length); 187011383Sbrandon.potter@amd.com // However, given that we don't support sparse mappings, and 187111383Sbrandon.potter@amd.com // some applications can map a couple of gigabytes of space 187211383Sbrandon.potter@amd.com // (intending sparse usage), that can get painfully expensive. 187311383Sbrandon.potter@amd.com // Fortunately, since we don't properly implement munmap either, 187411383Sbrandon.potter@amd.com // there's no danger of remapping used memory, so for now all 187511383Sbrandon.potter@amd.com // newly mapped memory should already be zeroed so we can skip it. 187611383Sbrandon.potter@amd.com } else { 187711383Sbrandon.potter@amd.com // It is possible to mmap an area larger than a file, however 187811383Sbrandon.potter@amd.com // accessing unmapped portions the system triggers a "Bus error" 187911383Sbrandon.potter@amd.com // on the host. We must know when to stop copying the file from 188011383Sbrandon.potter@amd.com // the host into the target address space. 188111383Sbrandon.potter@amd.com struct stat file_stat; 188211383Sbrandon.potter@amd.com if (fstat(sim_fd, &file_stat) > 0) 188311383Sbrandon.potter@amd.com fatal("mmap: cannot stat file"); 188411383Sbrandon.potter@amd.com 188511383Sbrandon.potter@amd.com // Copy the portion of the file that is resident. This requires 188611383Sbrandon.potter@amd.com // checking both the mmap size and the filesize that we are 188711383Sbrandon.potter@amd.com // trying to mmap into this space; the mmap size also depends 188811383Sbrandon.potter@amd.com // on the specified offset into the file. 188911383Sbrandon.potter@amd.com uint64_t size = std::min((uint64_t)file_stat.st_size - offset, 189011383Sbrandon.potter@amd.com length); 189111383Sbrandon.potter@amd.com tp.writeBlob(start, pmap, size); 189211383Sbrandon.potter@amd.com 189311383Sbrandon.potter@amd.com // Cleanup the mmap region before exiting this function. 189411383Sbrandon.potter@amd.com munmap(pmap, length); 189511383Sbrandon.potter@amd.com 189611392Sbrandon.potter@amd.com // Maintain the symbol table for dynamic executables. 189711392Sbrandon.potter@amd.com // The loader will call mmap to map the images into its address 189811392Sbrandon.potter@amd.com // space and we intercept that here. We can verify that we are 189911392Sbrandon.potter@amd.com // executing inside the loader by checking the program counter value. 190011392Sbrandon.potter@amd.com // XXX: with multiprogrammed workloads or multi-node configurations, 190111392Sbrandon.potter@amd.com // this will not work since there is a single global symbol table. 190211392Sbrandon.potter@amd.com ObjectFile *interpreter = p->getInterpreter(); 190311392Sbrandon.potter@amd.com if (interpreter) { 190411392Sbrandon.potter@amd.com Addr text_start = interpreter->textBase(); 190511392Sbrandon.potter@amd.com Addr text_end = text_start + interpreter->textSize(); 190611392Sbrandon.potter@amd.com 190711392Sbrandon.potter@amd.com Addr pc = tc->pcState().pc(); 190811392Sbrandon.potter@amd.com 190911392Sbrandon.potter@amd.com if (pc >= text_start && pc < text_end) { 191011856Sbrandon.potter@amd.com std::shared_ptr<FDEntry> fdep = (*p->fds)[tgt_fd]; 191111856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(fdep); 191211856Sbrandon.potter@amd.com ObjectFile *lib = createObjectFile(ffdp->getFileName()); 191311392Sbrandon.potter@amd.com 191411392Sbrandon.potter@amd.com if (lib) { 191511392Sbrandon.potter@amd.com lib->loadAllSymbols(debugSymbolTable, 191611392Sbrandon.potter@amd.com lib->textBase(), start); 191711392Sbrandon.potter@amd.com } 191811392Sbrandon.potter@amd.com } 191911392Sbrandon.potter@amd.com } 192011392Sbrandon.potter@amd.com 192111383Sbrandon.potter@amd.com // Note that we do not zero out the remainder of the mapping. This 192211383Sbrandon.potter@amd.com // is done by a real system, but it probably will not affect 192311383Sbrandon.potter@amd.com // execution (hopefully). 192411383Sbrandon.potter@amd.com } 192511383Sbrandon.potter@amd.com 19261458SN/A return start; 1927360SN/A} 1928360SN/A 192911593Santhony.gutierrez@amd.comtemplate <class OS> 193011593Santhony.gutierrez@amd.comSyscallReturn 193111851Sbrandon.potter@amd.compwrite64Func(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 193211593Santhony.gutierrez@amd.com{ 193311593Santhony.gutierrez@amd.com int index = 0; 193411593Santhony.gutierrez@amd.com int tgt_fd = p->getSyscallArg(tc, index); 193511593Santhony.gutierrez@amd.com Addr bufPtr = p->getSyscallArg(tc, index); 193611593Santhony.gutierrez@amd.com int nbytes = p->getSyscallArg(tc, index); 193711593Santhony.gutierrez@amd.com int offset = p->getSyscallArg(tc, index); 193811593Santhony.gutierrez@amd.com 193911856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 194011856Sbrandon.potter@amd.com if (!ffdp) 194111593Santhony.gutierrez@amd.com return -EBADF; 194211856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 194311593Santhony.gutierrez@amd.com 194411593Santhony.gutierrez@amd.com BufferArg bufArg(bufPtr, nbytes); 194511593Santhony.gutierrez@amd.com bufArg.copyIn(tc->getMemProxy()); 194611593Santhony.gutierrez@amd.com 194711594Santhony.gutierrez@amd.com int bytes_written = pwrite(sim_fd, bufArg.bufferPtr(), nbytes, offset); 194811593Santhony.gutierrez@amd.com 194911593Santhony.gutierrez@amd.com return (bytes_written == -1) ? -errno : bytes_written; 195011593Santhony.gutierrez@amd.com} 195111593Santhony.gutierrez@amd.com 195211385Sbrandon.potter@amd.com/// Target mmap() handler. 195311385Sbrandon.potter@amd.comtemplate <class OS> 195411385Sbrandon.potter@amd.comSyscallReturn 195511851Sbrandon.potter@amd.commmapFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 195611385Sbrandon.potter@amd.com{ 195711385Sbrandon.potter@amd.com return mmapImpl<OS>(desc, num, p, tc, false); 195811385Sbrandon.potter@amd.com} 195911385Sbrandon.potter@amd.com 196011385Sbrandon.potter@amd.com/// Target mmap2() handler. 196111385Sbrandon.potter@amd.comtemplate <class OS> 196211385Sbrandon.potter@amd.comSyscallReturn 196311851Sbrandon.potter@amd.commmap2Func(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 196411385Sbrandon.potter@amd.com{ 196511385Sbrandon.potter@amd.com return mmapImpl<OS>(desc, num, p, tc, true); 196611385Sbrandon.potter@amd.com} 196711385Sbrandon.potter@amd.com 1968378SN/A/// Target getrlimit() handler. 1969360SN/Atemplate <class OS> 19701450SN/ASyscallReturn 197111851Sbrandon.potter@amd.comgetrlimitFunc(SyscallDesc *desc, int callnum, Process *process, 197211851Sbrandon.potter@amd.com ThreadContext *tc) 1973360SN/A{ 19746701Sgblack@eecs.umich.edu int index = 0; 19756701Sgblack@eecs.umich.edu unsigned resource = process->getSyscallArg(tc, index); 19766701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::rlimit> rlp(process->getSyscallArg(tc, index)); 1977360SN/A 1978360SN/A switch (resource) { 197911906SBrandon.Potter@amd.com case OS::TGT_RLIMIT_STACK: 198011906SBrandon.Potter@amd.com // max stack size in bytes: make up a number (8MB for now) 198111906SBrandon.Potter@amd.com rlp->rlim_cur = rlp->rlim_max = 8 * 1024 * 1024; 198211906SBrandon.Potter@amd.com rlp->rlim_cur = TheISA::htog(rlp->rlim_cur); 198311906SBrandon.Potter@amd.com rlp->rlim_max = TheISA::htog(rlp->rlim_max); 198411906SBrandon.Potter@amd.com break; 1985360SN/A 198611906SBrandon.Potter@amd.com case OS::TGT_RLIMIT_DATA: 198711906SBrandon.Potter@amd.com // max data segment size in bytes: make up a number 198811906SBrandon.Potter@amd.com rlp->rlim_cur = rlp->rlim_max = 256 * 1024 * 1024; 198911906SBrandon.Potter@amd.com rlp->rlim_cur = TheISA::htog(rlp->rlim_cur); 199011906SBrandon.Potter@amd.com rlp->rlim_max = TheISA::htog(rlp->rlim_max); 199111906SBrandon.Potter@amd.com break; 19925877Shsul@eecs.umich.edu 199311906SBrandon.Potter@amd.com default: 199411906SBrandon.Potter@amd.com warn("getrlimit: unimplemented resource %d", resource); 199511906SBrandon.Potter@amd.com return -EINVAL; 199611906SBrandon.Potter@amd.com break; 1997360SN/A } 1998360SN/A 19998706Sandreas.hansson@arm.com rlp.copyOut(tc->getMemProxy()); 20001458SN/A return 0; 2001360SN/A} 2002360SN/A 200312235Sar4jc@virginia.edutemplate <class OS> 200412235Sar4jc@virginia.eduSyscallReturn 200512235Sar4jc@virginia.eduprlimitFunc(SyscallDesc *desc, int callnum, Process *process, 200612235Sar4jc@virginia.edu ThreadContext *tc) 200712235Sar4jc@virginia.edu{ 200812235Sar4jc@virginia.edu int index = 0; 200912235Sar4jc@virginia.edu if (process->getSyscallArg(tc, index) != 0) 201012235Sar4jc@virginia.edu { 201112235Sar4jc@virginia.edu warn("prlimit: ignoring rlimits for nonzero pid"); 201212235Sar4jc@virginia.edu return -EPERM; 201312235Sar4jc@virginia.edu } 201412235Sar4jc@virginia.edu int resource = process->getSyscallArg(tc, index); 201512235Sar4jc@virginia.edu Addr n = process->getSyscallArg(tc, index); 201612235Sar4jc@virginia.edu if (n != 0) 201712235Sar4jc@virginia.edu warn("prlimit: ignoring new rlimit"); 201812235Sar4jc@virginia.edu Addr o = process->getSyscallArg(tc, index); 201912235Sar4jc@virginia.edu if (o != 0) 202012235Sar4jc@virginia.edu { 202112416Sqtt2@cornell.edu TypedBufferArg<typename OS::rlimit> rlp(o); 202212235Sar4jc@virginia.edu switch (resource) { 202312235Sar4jc@virginia.edu case OS::TGT_RLIMIT_STACK: 202412235Sar4jc@virginia.edu // max stack size in bytes: make up a number (8MB for now) 202512235Sar4jc@virginia.edu rlp->rlim_cur = rlp->rlim_max = 8 * 1024 * 1024; 202612235Sar4jc@virginia.edu rlp->rlim_cur = TheISA::htog(rlp->rlim_cur); 202712235Sar4jc@virginia.edu rlp->rlim_max = TheISA::htog(rlp->rlim_max); 202812235Sar4jc@virginia.edu break; 202912235Sar4jc@virginia.edu case OS::TGT_RLIMIT_DATA: 203012235Sar4jc@virginia.edu // max data segment size in bytes: make up a number 203112235Sar4jc@virginia.edu rlp->rlim_cur = rlp->rlim_max = 256*1024*1024; 203212235Sar4jc@virginia.edu rlp->rlim_cur = TheISA::htog(rlp->rlim_cur); 203312235Sar4jc@virginia.edu rlp->rlim_max = TheISA::htog(rlp->rlim_max); 203412593Sjason@lowepower.com break; 203512235Sar4jc@virginia.edu default: 203612235Sar4jc@virginia.edu warn("prlimit: unimplemented resource %d", resource); 203712235Sar4jc@virginia.edu return -EINVAL; 203812235Sar4jc@virginia.edu break; 203912235Sar4jc@virginia.edu } 204012235Sar4jc@virginia.edu rlp.copyOut(tc->getMemProxy()); 204112235Sar4jc@virginia.edu } 204212235Sar4jc@virginia.edu return 0; 204312235Sar4jc@virginia.edu} 204412235Sar4jc@virginia.edu 204510796Sbrandon.potter@amd.com/// Target clock_gettime() function. 204610796Sbrandon.potter@amd.comtemplate <class OS> 204710796Sbrandon.potter@amd.comSyscallReturn 204811851Sbrandon.potter@amd.comclock_gettimeFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 204910796Sbrandon.potter@amd.com{ 205010796Sbrandon.potter@amd.com int index = 1; 205110796Sbrandon.potter@amd.com //int clk_id = p->getSyscallArg(tc, index); 205210796Sbrandon.potter@amd.com TypedBufferArg<typename OS::timespec> tp(p->getSyscallArg(tc, index)); 205310796Sbrandon.potter@amd.com 205410796Sbrandon.potter@amd.com getElapsedTimeNano(tp->tv_sec, tp->tv_nsec); 205510796Sbrandon.potter@amd.com tp->tv_sec += seconds_since_epoch; 205610796Sbrandon.potter@amd.com tp->tv_sec = TheISA::htog(tp->tv_sec); 205710796Sbrandon.potter@amd.com tp->tv_nsec = TheISA::htog(tp->tv_nsec); 205810796Sbrandon.potter@amd.com 205910796Sbrandon.potter@amd.com tp.copyOut(tc->getMemProxy()); 206010796Sbrandon.potter@amd.com 206110796Sbrandon.potter@amd.com return 0; 206210796Sbrandon.potter@amd.com} 206310796Sbrandon.potter@amd.com 206411337SMichael.Lebeane@amd.com/// Target clock_getres() function. 206511337SMichael.Lebeane@amd.comtemplate <class OS> 206611337SMichael.Lebeane@amd.comSyscallReturn 206711851Sbrandon.potter@amd.comclock_getresFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 206811337SMichael.Lebeane@amd.com{ 206911337SMichael.Lebeane@amd.com int index = 1; 207011337SMichael.Lebeane@amd.com TypedBufferArg<typename OS::timespec> tp(p->getSyscallArg(tc, index)); 207111337SMichael.Lebeane@amd.com 207211337SMichael.Lebeane@amd.com // Set resolution at ns, which is what clock_gettime() returns 207311337SMichael.Lebeane@amd.com tp->tv_sec = 0; 207411337SMichael.Lebeane@amd.com tp->tv_nsec = 1; 207511337SMichael.Lebeane@amd.com 207611337SMichael.Lebeane@amd.com tp.copyOut(tc->getMemProxy()); 207711337SMichael.Lebeane@amd.com 207811337SMichael.Lebeane@amd.com return 0; 207911337SMichael.Lebeane@amd.com} 208011337SMichael.Lebeane@amd.com 2081378SN/A/// Target gettimeofday() handler. 2082360SN/Atemplate <class OS> 20831450SN/ASyscallReturn 208411851Sbrandon.potter@amd.comgettimeofdayFunc(SyscallDesc *desc, int callnum, Process *process, 208511851Sbrandon.potter@amd.com ThreadContext *tc) 2086360SN/A{ 20876701Sgblack@eecs.umich.edu int index = 0; 20886701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::timeval> tp(process->getSyscallArg(tc, index)); 2089360SN/A 209010796Sbrandon.potter@amd.com getElapsedTimeMicro(tp->tv_sec, tp->tv_usec); 2091360SN/A tp->tv_sec += seconds_since_epoch; 20926109Ssanchezd@stanford.edu tp->tv_sec = TheISA::htog(tp->tv_sec); 20936109Ssanchezd@stanford.edu tp->tv_usec = TheISA::htog(tp->tv_usec); 2094360SN/A 20958706Sandreas.hansson@arm.com tp.copyOut(tc->getMemProxy()); 2096360SN/A 20971458SN/A return 0; 2098360SN/A} 2099360SN/A 2100360SN/A 21011999SN/A/// Target utimes() handler. 21021999SN/Atemplate <class OS> 21031999SN/ASyscallReturn 210411851Sbrandon.potter@amd.comutimesFunc(SyscallDesc *desc, int callnum, Process *process, 21052680Sktlim@umich.edu ThreadContext *tc) 21061999SN/A{ 21071999SN/A std::string path; 21081999SN/A 21096701Sgblack@eecs.umich.edu int index = 0; 21108852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 21116701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 21126701Sgblack@eecs.umich.edu return -EFAULT; 21136701Sgblack@eecs.umich.edu } 21141999SN/A 21156701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::timeval [2]> 21166701Sgblack@eecs.umich.edu tp(process->getSyscallArg(tc, index)); 21178706Sandreas.hansson@arm.com tp.copyIn(tc->getMemProxy()); 21181999SN/A 21191999SN/A struct timeval hostTimeval[2]; 212011906SBrandon.Potter@amd.com for (int i = 0; i < 2; ++i) { 21218737Skoansin.tan@gmail.com hostTimeval[i].tv_sec = TheISA::gtoh((*tp)[i].tv_sec); 21228737Skoansin.tan@gmail.com hostTimeval[i].tv_usec = TheISA::gtoh((*tp)[i].tv_usec); 21231999SN/A } 21243669Sbinkertn@umich.edu 212513883Sdavid.hashe@amd.com // Adjust path for cwd and redirection 212613883Sdavid.hashe@amd.com path = process->checkPathRedirect(path); 21273669Sbinkertn@umich.edu 21281999SN/A int result = utimes(path.c_str(), hostTimeval); 21291999SN/A 21301999SN/A if (result < 0) 21311999SN/A return -errno; 21321999SN/A 21331999SN/A return 0; 21341999SN/A} 213511886Sbrandon.potter@amd.com 213611886Sbrandon.potter@amd.comtemplate <class OS> 213711886Sbrandon.potter@amd.comSyscallReturn 213811886Sbrandon.potter@amd.comexecveFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 213911886Sbrandon.potter@amd.com{ 214011886Sbrandon.potter@amd.com desc->setFlags(0); 214111886Sbrandon.potter@amd.com 214211886Sbrandon.potter@amd.com int index = 0; 214311886Sbrandon.potter@amd.com std::string path; 214411886Sbrandon.potter@amd.com SETranslatingPortProxy & mem_proxy = tc->getMemProxy(); 214511886Sbrandon.potter@amd.com if (!mem_proxy.tryReadString(path, p->getSyscallArg(tc, index))) 214611886Sbrandon.potter@amd.com return -EFAULT; 214711886Sbrandon.potter@amd.com 214811886Sbrandon.potter@amd.com if (access(path.c_str(), F_OK) == -1) 214911886Sbrandon.potter@amd.com return -EACCES; 215011886Sbrandon.potter@amd.com 215111886Sbrandon.potter@amd.com auto read_in = [](std::vector<std::string> & vect, 215211886Sbrandon.potter@amd.com SETranslatingPortProxy & mem_proxy, 215311886Sbrandon.potter@amd.com Addr mem_loc) 215411886Sbrandon.potter@amd.com { 215511886Sbrandon.potter@amd.com for (int inc = 0; ; inc++) { 215611886Sbrandon.potter@amd.com BufferArg b((mem_loc + sizeof(Addr) * inc), sizeof(Addr)); 215711886Sbrandon.potter@amd.com b.copyIn(mem_proxy); 215811886Sbrandon.potter@amd.com 215911886Sbrandon.potter@amd.com if (!*(Addr*)b.bufferPtr()) 216011886Sbrandon.potter@amd.com break; 216111886Sbrandon.potter@amd.com 216211886Sbrandon.potter@amd.com vect.push_back(std::string()); 216311886Sbrandon.potter@amd.com mem_proxy.tryReadString(vect[inc], *(Addr*)b.bufferPtr()); 216411886Sbrandon.potter@amd.com } 216511886Sbrandon.potter@amd.com }; 216611886Sbrandon.potter@amd.com 216711886Sbrandon.potter@amd.com /** 216811886Sbrandon.potter@amd.com * Note that ProcessParams is generated by swig and there are no other 216911886Sbrandon.potter@amd.com * examples of how to create anything but this default constructor. The 217011886Sbrandon.potter@amd.com * fields are manually initialized instead of passing parameters to the 217111886Sbrandon.potter@amd.com * constructor. 217211886Sbrandon.potter@amd.com */ 217311886Sbrandon.potter@amd.com ProcessParams *pp = new ProcessParams(); 217411886Sbrandon.potter@amd.com pp->executable = path; 217511886Sbrandon.potter@amd.com Addr argv_mem_loc = p->getSyscallArg(tc, index); 217611886Sbrandon.potter@amd.com read_in(pp->cmd, mem_proxy, argv_mem_loc); 217711886Sbrandon.potter@amd.com Addr envp_mem_loc = p->getSyscallArg(tc, index); 217811886Sbrandon.potter@amd.com read_in(pp->env, mem_proxy, envp_mem_loc); 217911886Sbrandon.potter@amd.com pp->uid = p->uid(); 218011886Sbrandon.potter@amd.com pp->egid = p->egid(); 218111886Sbrandon.potter@amd.com pp->euid = p->euid(); 218211886Sbrandon.potter@amd.com pp->gid = p->gid(); 218311886Sbrandon.potter@amd.com pp->ppid = p->ppid(); 218411886Sbrandon.potter@amd.com pp->pid = p->pid(); 218511886Sbrandon.potter@amd.com pp->input.assign("cin"); 218611886Sbrandon.potter@amd.com pp->output.assign("cout"); 218711886Sbrandon.potter@amd.com pp->errout.assign("cerr"); 218813883Sdavid.hashe@amd.com pp->cwd.assign(p->tgtCwd); 218911886Sbrandon.potter@amd.com pp->system = p->system; 219011886Sbrandon.potter@amd.com /** 219111886Sbrandon.potter@amd.com * Prevent process object creation with identical PIDs (which will trip 219211886Sbrandon.potter@amd.com * a fatal check in Process constructor). The execve call is supposed to 219311886Sbrandon.potter@amd.com * take over the currently executing process' identity but replace 219411886Sbrandon.potter@amd.com * whatever it is doing with a new process image. Instead of hijacking 219511886Sbrandon.potter@amd.com * the process object in the simulator, we create a new process object 219611886Sbrandon.potter@amd.com * and bind to the previous process' thread below (hijacking the thread). 219711886Sbrandon.potter@amd.com */ 219811886Sbrandon.potter@amd.com p->system->PIDs.erase(p->pid()); 219911886Sbrandon.potter@amd.com Process *new_p = pp->create(); 220011886Sbrandon.potter@amd.com delete pp; 220111886Sbrandon.potter@amd.com 220211886Sbrandon.potter@amd.com /** 220311886Sbrandon.potter@amd.com * Work through the file descriptor array and close any files marked 220411886Sbrandon.potter@amd.com * close-on-exec. 220511886Sbrandon.potter@amd.com */ 220611886Sbrandon.potter@amd.com new_p->fds = p->fds; 220711886Sbrandon.potter@amd.com for (int i = 0; i < new_p->fds->getSize(); i++) { 220811886Sbrandon.potter@amd.com std::shared_ptr<FDEntry> fdep = (*new_p->fds)[i]; 220911886Sbrandon.potter@amd.com if (fdep && fdep->getCOE()) 221011886Sbrandon.potter@amd.com new_p->fds->closeFDEntry(i); 221111886Sbrandon.potter@amd.com } 221211886Sbrandon.potter@amd.com 221311886Sbrandon.potter@amd.com *new_p->sigchld = true; 221411886Sbrandon.potter@amd.com 221511886Sbrandon.potter@amd.com delete p; 221611886Sbrandon.potter@amd.com tc->clearArchRegs(); 221711886Sbrandon.potter@amd.com tc->setProcessPtr(new_p); 221811886Sbrandon.potter@amd.com new_p->assignThreadContext(tc->contextId()); 221911886Sbrandon.potter@amd.com new_p->initState(); 222011886Sbrandon.potter@amd.com tc->activate(); 222111886Sbrandon.potter@amd.com TheISA::PCState pcState = tc->pcState(); 222211886Sbrandon.potter@amd.com tc->setNPC(pcState.instAddr()); 222311886Sbrandon.potter@amd.com 222411886Sbrandon.potter@amd.com desc->setFlags(SyscallDesc::SuppressReturnValue); 222511886Sbrandon.potter@amd.com return 0; 222611886Sbrandon.potter@amd.com} 222711886Sbrandon.potter@amd.com 2228378SN/A/// Target getrusage() function. 2229360SN/Atemplate <class OS> 22301450SN/ASyscallReturn 223111851Sbrandon.potter@amd.comgetrusageFunc(SyscallDesc *desc, int callnum, Process *process, 22322680Sktlim@umich.edu ThreadContext *tc) 2233360SN/A{ 22346701Sgblack@eecs.umich.edu int index = 0; 22356701Sgblack@eecs.umich.edu int who = process->getSyscallArg(tc, index); // THREAD, SELF, or CHILDREN 22366701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::rusage> rup(process->getSyscallArg(tc, index)); 2237360SN/A 22383670Sbinkertn@umich.edu rup->ru_utime.tv_sec = 0; 22393670Sbinkertn@umich.edu rup->ru_utime.tv_usec = 0; 2240360SN/A rup->ru_stime.tv_sec = 0; 2241360SN/A rup->ru_stime.tv_usec = 0; 2242360SN/A rup->ru_maxrss = 0; 2243360SN/A rup->ru_ixrss = 0; 2244360SN/A rup->ru_idrss = 0; 2245360SN/A rup->ru_isrss = 0; 2246360SN/A rup->ru_minflt = 0; 2247360SN/A rup->ru_majflt = 0; 2248360SN/A rup->ru_nswap = 0; 2249360SN/A rup->ru_inblock = 0; 2250360SN/A rup->ru_oublock = 0; 2251360SN/A rup->ru_msgsnd = 0; 2252360SN/A rup->ru_msgrcv = 0; 2253360SN/A rup->ru_nsignals = 0; 2254360SN/A rup->ru_nvcsw = 0; 2255360SN/A rup->ru_nivcsw = 0; 2256360SN/A 22573670Sbinkertn@umich.edu switch (who) { 22583670Sbinkertn@umich.edu case OS::TGT_RUSAGE_SELF: 225910796Sbrandon.potter@amd.com getElapsedTimeMicro(rup->ru_utime.tv_sec, rup->ru_utime.tv_usec); 22608737Skoansin.tan@gmail.com rup->ru_utime.tv_sec = TheISA::htog(rup->ru_utime.tv_sec); 22618737Skoansin.tan@gmail.com rup->ru_utime.tv_usec = TheISA::htog(rup->ru_utime.tv_usec); 22623670Sbinkertn@umich.edu break; 22633670Sbinkertn@umich.edu 22643670Sbinkertn@umich.edu case OS::TGT_RUSAGE_CHILDREN: 22653670Sbinkertn@umich.edu // do nothing. We have no child processes, so they take no time. 22663670Sbinkertn@umich.edu break; 22673670Sbinkertn@umich.edu 22683670Sbinkertn@umich.edu default: 22693670Sbinkertn@umich.edu // don't really handle THREAD or CHILDREN, but just warn and 22703670Sbinkertn@umich.edu // plow ahead 22713670Sbinkertn@umich.edu warn("getrusage() only supports RUSAGE_SELF. Parameter %d ignored.", 22723670Sbinkertn@umich.edu who); 22733670Sbinkertn@umich.edu } 22743670Sbinkertn@umich.edu 22758706Sandreas.hansson@arm.com rup.copyOut(tc->getMemProxy()); 2276360SN/A 22771458SN/A return 0; 2278360SN/A} 2279360SN/A 22806683Stjones1@inf.ed.ac.uk/// Target times() function. 22816683Stjones1@inf.ed.ac.uktemplate <class OS> 22826683Stjones1@inf.ed.ac.ukSyscallReturn 228311851Sbrandon.potter@amd.comtimesFunc(SyscallDesc *desc, int callnum, Process *process, 228411851Sbrandon.potter@amd.com ThreadContext *tc) 22856683Stjones1@inf.ed.ac.uk{ 22866701Sgblack@eecs.umich.edu int index = 0; 22876701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::tms> bufp(process->getSyscallArg(tc, index)); 22886683Stjones1@inf.ed.ac.uk 22896683Stjones1@inf.ed.ac.uk // Fill in the time structure (in clocks) 22907823Ssteve.reinhardt@amd.com int64_t clocks = curTick() * OS::M5_SC_CLK_TCK / SimClock::Int::s; 22916683Stjones1@inf.ed.ac.uk bufp->tms_utime = clocks; 22926683Stjones1@inf.ed.ac.uk bufp->tms_stime = 0; 22936683Stjones1@inf.ed.ac.uk bufp->tms_cutime = 0; 22946683Stjones1@inf.ed.ac.uk bufp->tms_cstime = 0; 22956683Stjones1@inf.ed.ac.uk 22966683Stjones1@inf.ed.ac.uk // Convert to host endianness 22978737Skoansin.tan@gmail.com bufp->tms_utime = TheISA::htog(bufp->tms_utime); 22986683Stjones1@inf.ed.ac.uk 22996683Stjones1@inf.ed.ac.uk // Write back 23008706Sandreas.hansson@arm.com bufp.copyOut(tc->getMemProxy()); 23016683Stjones1@inf.ed.ac.uk 23026683Stjones1@inf.ed.ac.uk // Return clock ticks since system boot 23036683Stjones1@inf.ed.ac.uk return clocks; 23046683Stjones1@inf.ed.ac.uk} 23052553SN/A 23066684Stjones1@inf.ed.ac.uk/// Target time() function. 23076684Stjones1@inf.ed.ac.uktemplate <class OS> 23086684Stjones1@inf.ed.ac.ukSyscallReturn 230911851Sbrandon.potter@amd.comtimeFunc(SyscallDesc *desc, int callnum, Process *process, ThreadContext *tc) 23106684Stjones1@inf.ed.ac.uk{ 23116684Stjones1@inf.ed.ac.uk typename OS::time_t sec, usec; 231210796Sbrandon.potter@amd.com getElapsedTimeMicro(sec, usec); 23136684Stjones1@inf.ed.ac.uk sec += seconds_since_epoch; 23146684Stjones1@inf.ed.ac.uk 23156701Sgblack@eecs.umich.edu int index = 0; 23166701Sgblack@eecs.umich.edu Addr taddr = (Addr)process->getSyscallArg(tc, index); 231711321Ssteve.reinhardt@amd.com if (taddr != 0) { 23186684Stjones1@inf.ed.ac.uk typename OS::time_t t = sec; 23198737Skoansin.tan@gmail.com t = TheISA::htog(t); 23208852Sandreas.hansson@arm.com SETranslatingPortProxy &p = tc->getMemProxy(); 23218852Sandreas.hansson@arm.com p.writeBlob(taddr, (uint8_t*)&t, (int)sizeof(typename OS::time_t)); 23226684Stjones1@inf.ed.ac.uk } 23236684Stjones1@inf.ed.ac.uk return sec; 23246684Stjones1@inf.ed.ac.uk} 23252553SN/A 232611910SBrandon.Potter@amd.comtemplate <class OS> 232711910SBrandon.Potter@amd.comSyscallReturn 232811910SBrandon.Potter@amd.comtgkillFunc(SyscallDesc *desc, int num, Process *process, ThreadContext *tc) 232911910SBrandon.Potter@amd.com{ 233011910SBrandon.Potter@amd.com int index = 0; 233111910SBrandon.Potter@amd.com int tgid = process->getSyscallArg(tc, index); 233211910SBrandon.Potter@amd.com int tid = process->getSyscallArg(tc, index); 233311910SBrandon.Potter@amd.com int sig = process->getSyscallArg(tc, index); 233411910SBrandon.Potter@amd.com 233511910SBrandon.Potter@amd.com /** 233611910SBrandon.Potter@amd.com * This system call is intended to allow killing a specific thread 233711910SBrandon.Potter@amd.com * within an arbitrary thread group if sanctioned with permission checks. 233811910SBrandon.Potter@amd.com * It's usually true that threads share the termination signal as pointed 233911910SBrandon.Potter@amd.com * out by the pthread_kill man page and this seems to be the intended 234011910SBrandon.Potter@amd.com * usage. Due to this being an emulated environment, assume the following: 234111910SBrandon.Potter@amd.com * Threads are allowed to call tgkill because the EUID for all threads 234211910SBrandon.Potter@amd.com * should be the same. There is no signal handling mechanism for kernel 234311910SBrandon.Potter@amd.com * registration of signal handlers since signals are poorly supported in 234411910SBrandon.Potter@amd.com * emulation mode. Since signal handlers cannot be registered, all 234511910SBrandon.Potter@amd.com * threads within in a thread group must share the termination signal. 234611910SBrandon.Potter@amd.com * We never exhaust PIDs so there's no chance of finding the wrong one 234711910SBrandon.Potter@amd.com * due to PID rollover. 234811910SBrandon.Potter@amd.com */ 234911910SBrandon.Potter@amd.com 235011910SBrandon.Potter@amd.com System *sys = tc->getSystemPtr(); 235111910SBrandon.Potter@amd.com Process *tgt_proc = nullptr; 235211910SBrandon.Potter@amd.com for (int i = 0; i < sys->numContexts(); i++) { 235311910SBrandon.Potter@amd.com Process *temp = sys->threadContexts[i]->getProcessPtr(); 235411910SBrandon.Potter@amd.com if (temp->pid() == tid) { 235511910SBrandon.Potter@amd.com tgt_proc = temp; 235611910SBrandon.Potter@amd.com break; 235711910SBrandon.Potter@amd.com } 235811910SBrandon.Potter@amd.com } 235911910SBrandon.Potter@amd.com 236011910SBrandon.Potter@amd.com if (sig != 0 || sig != OS::TGT_SIGABRT) 236111910SBrandon.Potter@amd.com return -EINVAL; 236211910SBrandon.Potter@amd.com 236311910SBrandon.Potter@amd.com if (tgt_proc == nullptr) 236411910SBrandon.Potter@amd.com return -ESRCH; 236511910SBrandon.Potter@amd.com 236611910SBrandon.Potter@amd.com if (tgid != -1 && tgt_proc->tgid() != tgid) 236711910SBrandon.Potter@amd.com return -ESRCH; 236811910SBrandon.Potter@amd.com 236911910SBrandon.Potter@amd.com if (sig == OS::TGT_SIGABRT) 237011910SBrandon.Potter@amd.com exitGroupFunc(desc, 252, process, tc); 237111910SBrandon.Potter@amd.com 237211910SBrandon.Potter@amd.com return 0; 237311910SBrandon.Potter@amd.com} 237411910SBrandon.Potter@amd.com 237513568Sbrandon.potter@amd.comtemplate <class OS> 237613568Sbrandon.potter@amd.comSyscallReturn 237713568Sbrandon.potter@amd.comsocketFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 237813568Sbrandon.potter@amd.com{ 237913568Sbrandon.potter@amd.com int index = 0; 238013568Sbrandon.potter@amd.com int domain = p->getSyscallArg(tc, index); 238113568Sbrandon.potter@amd.com int type = p->getSyscallArg(tc, index); 238213568Sbrandon.potter@amd.com int prot = p->getSyscallArg(tc, index); 238313568Sbrandon.potter@amd.com 238413568Sbrandon.potter@amd.com int sim_fd = socket(domain, type, prot); 238513568Sbrandon.potter@amd.com if (sim_fd == -1) 238613568Sbrandon.potter@amd.com return -errno; 238713568Sbrandon.potter@amd.com 238813568Sbrandon.potter@amd.com auto sfdp = std::make_shared<SocketFDEntry>(sim_fd, domain, type, prot); 238913568Sbrandon.potter@amd.com int tgt_fd = p->fds->allocFD(sfdp); 239013568Sbrandon.potter@amd.com 239113568Sbrandon.potter@amd.com return tgt_fd; 239213568Sbrandon.potter@amd.com} 239313568Sbrandon.potter@amd.com 239413568Sbrandon.potter@amd.comtemplate <class OS> 239513568Sbrandon.potter@amd.comSyscallReturn 239613568Sbrandon.potter@amd.comsocketpairFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 239713568Sbrandon.potter@amd.com{ 239813568Sbrandon.potter@amd.com int index = 0; 239913568Sbrandon.potter@amd.com int domain = p->getSyscallArg(tc, index); 240013568Sbrandon.potter@amd.com int type = p->getSyscallArg(tc, index); 240113568Sbrandon.potter@amd.com int prot = p->getSyscallArg(tc, index); 240213568Sbrandon.potter@amd.com Addr svPtr = p->getSyscallArg(tc, index); 240313568Sbrandon.potter@amd.com 240413568Sbrandon.potter@amd.com BufferArg svBuf((Addr)svPtr, 2 * sizeof(int)); 240513568Sbrandon.potter@amd.com int status = socketpair(domain, type, prot, (int *)svBuf.bufferPtr()); 240613568Sbrandon.potter@amd.com if (status == -1) 240713568Sbrandon.potter@amd.com return -errno; 240813568Sbrandon.potter@amd.com 240913568Sbrandon.potter@amd.com int *fds = (int *)svBuf.bufferPtr(); 241013568Sbrandon.potter@amd.com 241113568Sbrandon.potter@amd.com auto sfdp1 = std::make_shared<SocketFDEntry>(fds[0], domain, type, prot); 241213568Sbrandon.potter@amd.com fds[0] = p->fds->allocFD(sfdp1); 241313568Sbrandon.potter@amd.com auto sfdp2 = std::make_shared<SocketFDEntry>(fds[1], domain, type, prot); 241413568Sbrandon.potter@amd.com fds[1] = p->fds->allocFD(sfdp2); 241513568Sbrandon.potter@amd.com svBuf.copyOut(tc->getMemProxy()); 241613568Sbrandon.potter@amd.com 241713568Sbrandon.potter@amd.com return status; 241813568Sbrandon.potter@amd.com} 24192553SN/A 242013570Sbrandon.potter@amd.comtemplate <class OS> 242113570Sbrandon.potter@amd.comSyscallReturn 242213570Sbrandon.potter@amd.comselectFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 242313570Sbrandon.potter@amd.com{ 242413570Sbrandon.potter@amd.com int retval; 242513570Sbrandon.potter@amd.com 242613570Sbrandon.potter@amd.com int index = 0; 242713570Sbrandon.potter@amd.com int nfds_t = p->getSyscallArg(tc, index); 242813570Sbrandon.potter@amd.com Addr fds_read_ptr = p->getSyscallArg(tc, index); 242913570Sbrandon.potter@amd.com Addr fds_writ_ptr = p->getSyscallArg(tc, index); 243013570Sbrandon.potter@amd.com Addr fds_excp_ptr = p->getSyscallArg(tc, index); 243113570Sbrandon.potter@amd.com Addr time_val_ptr = p->getSyscallArg(tc, index); 243213570Sbrandon.potter@amd.com 243313570Sbrandon.potter@amd.com TypedBufferArg<typename OS::fd_set> rd_t(fds_read_ptr); 243413570Sbrandon.potter@amd.com TypedBufferArg<typename OS::fd_set> wr_t(fds_writ_ptr); 243513570Sbrandon.potter@amd.com TypedBufferArg<typename OS::fd_set> ex_t(fds_excp_ptr); 243613570Sbrandon.potter@amd.com TypedBufferArg<typename OS::timeval> tp(time_val_ptr); 243713570Sbrandon.potter@amd.com 243813570Sbrandon.potter@amd.com /** 243913570Sbrandon.potter@amd.com * Host fields. Notice that these use the definitions from the system 244013570Sbrandon.potter@amd.com * headers instead of the gem5 headers and libraries. If the host and 244113570Sbrandon.potter@amd.com * target have different header file definitions, this will not work. 244213570Sbrandon.potter@amd.com */ 244313570Sbrandon.potter@amd.com fd_set rd_h; 244413570Sbrandon.potter@amd.com FD_ZERO(&rd_h); 244513570Sbrandon.potter@amd.com fd_set wr_h; 244613570Sbrandon.potter@amd.com FD_ZERO(&wr_h); 244713570Sbrandon.potter@amd.com fd_set ex_h; 244813570Sbrandon.potter@amd.com FD_ZERO(&ex_h); 244913570Sbrandon.potter@amd.com 245013570Sbrandon.potter@amd.com /** 245113570Sbrandon.potter@amd.com * Copy in the fd_set from the target. 245213570Sbrandon.potter@amd.com */ 245313570Sbrandon.potter@amd.com if (fds_read_ptr) 245413570Sbrandon.potter@amd.com rd_t.copyIn(tc->getMemProxy()); 245513570Sbrandon.potter@amd.com if (fds_writ_ptr) 245613570Sbrandon.potter@amd.com wr_t.copyIn(tc->getMemProxy()); 245713570Sbrandon.potter@amd.com if (fds_excp_ptr) 245813570Sbrandon.potter@amd.com ex_t.copyIn(tc->getMemProxy()); 245913570Sbrandon.potter@amd.com 246013570Sbrandon.potter@amd.com /** 246113570Sbrandon.potter@amd.com * We need to translate the target file descriptor set into a host file 246213570Sbrandon.potter@amd.com * descriptor set. This involves both our internal process fd array 246313570Sbrandon.potter@amd.com * and the fd_set defined in Linux header files. The nfds field also 246413570Sbrandon.potter@amd.com * needs to be updated as it will be only target specific after 246513570Sbrandon.potter@amd.com * retrieving it from the target; the nfds value is expected to be the 246613570Sbrandon.potter@amd.com * highest file descriptor that needs to be checked, so we need to extend 246713570Sbrandon.potter@amd.com * it out for nfds_h when we do the update. 246813570Sbrandon.potter@amd.com */ 246913570Sbrandon.potter@amd.com int nfds_h = 0; 247013570Sbrandon.potter@amd.com std::map<int, int> trans_map; 247113570Sbrandon.potter@amd.com auto try_add_host_set = [&](fd_set *tgt_set_entry, 247213570Sbrandon.potter@amd.com fd_set *hst_set_entry, 247313570Sbrandon.potter@amd.com int iter) -> bool 247413570Sbrandon.potter@amd.com { 247513570Sbrandon.potter@amd.com /** 247613570Sbrandon.potter@amd.com * By this point, we know that we are looking at a valid file 247713570Sbrandon.potter@amd.com * descriptor set on the target. We need to check if the target file 247813570Sbrandon.potter@amd.com * descriptor value passed in as iter is part of the set. 247913570Sbrandon.potter@amd.com */ 248013570Sbrandon.potter@amd.com if (FD_ISSET(iter, tgt_set_entry)) { 248113570Sbrandon.potter@amd.com /** 248213570Sbrandon.potter@amd.com * We know that the target file descriptor belongs to the set, 248313570Sbrandon.potter@amd.com * but we do not yet know if the file descriptor is valid or 248413570Sbrandon.potter@amd.com * that we have a host mapping. Check that now. 248513570Sbrandon.potter@amd.com */ 248613570Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[iter]); 248713570Sbrandon.potter@amd.com if (!hbfdp) 248813570Sbrandon.potter@amd.com return true; 248913570Sbrandon.potter@amd.com auto sim_fd = hbfdp->getSimFD(); 249013570Sbrandon.potter@amd.com 249113570Sbrandon.potter@amd.com /** 249213570Sbrandon.potter@amd.com * Add the sim_fd to tgt_fd translation into trans_map for use 249313570Sbrandon.potter@amd.com * later when we need to zero the target fd_set structures and 249413570Sbrandon.potter@amd.com * then update them with hits returned from the host select call. 249513570Sbrandon.potter@amd.com */ 249613570Sbrandon.potter@amd.com trans_map[sim_fd] = iter; 249713570Sbrandon.potter@amd.com 249813570Sbrandon.potter@amd.com /** 249913570Sbrandon.potter@amd.com * We know that the host file descriptor exists so now we check 250013570Sbrandon.potter@amd.com * if we need to update the max count for nfds_h before passing 250113570Sbrandon.potter@amd.com * the duplicated structure into the host. 250213570Sbrandon.potter@amd.com */ 250313570Sbrandon.potter@amd.com nfds_h = std::max(nfds_h - 1, sim_fd + 1); 250413570Sbrandon.potter@amd.com 250513570Sbrandon.potter@amd.com /** 250613570Sbrandon.potter@amd.com * Add the host file descriptor to the set that we are going to 250713570Sbrandon.potter@amd.com * pass into the host. 250813570Sbrandon.potter@amd.com */ 250913570Sbrandon.potter@amd.com FD_SET(sim_fd, hst_set_entry); 251013570Sbrandon.potter@amd.com } 251113570Sbrandon.potter@amd.com return false; 251213570Sbrandon.potter@amd.com }; 251313570Sbrandon.potter@amd.com 251413570Sbrandon.potter@amd.com for (int i = 0; i < nfds_t; i++) { 251513570Sbrandon.potter@amd.com if (fds_read_ptr) { 251613570Sbrandon.potter@amd.com bool ebadf = try_add_host_set((fd_set*)&*rd_t, &rd_h, i); 251713570Sbrandon.potter@amd.com if (ebadf) return -EBADF; 251813570Sbrandon.potter@amd.com } 251913570Sbrandon.potter@amd.com if (fds_writ_ptr) { 252013570Sbrandon.potter@amd.com bool ebadf = try_add_host_set((fd_set*)&*wr_t, &wr_h, i); 252113570Sbrandon.potter@amd.com if (ebadf) return -EBADF; 252213570Sbrandon.potter@amd.com } 252313570Sbrandon.potter@amd.com if (fds_excp_ptr) { 252413570Sbrandon.potter@amd.com bool ebadf = try_add_host_set((fd_set*)&*ex_t, &ex_h, i); 252513570Sbrandon.potter@amd.com if (ebadf) return -EBADF; 252613570Sbrandon.potter@amd.com } 252713570Sbrandon.potter@amd.com } 252813570Sbrandon.potter@amd.com 252913570Sbrandon.potter@amd.com if (time_val_ptr) { 253013570Sbrandon.potter@amd.com /** 253113570Sbrandon.potter@amd.com * It might be possible to decrement the timeval based on some 253213570Sbrandon.potter@amd.com * derivation of wall clock determined from elapsed simulator ticks 253313570Sbrandon.potter@amd.com * but that seems like overkill. Rather, we just set the timeval with 253413570Sbrandon.potter@amd.com * zero timeout. (There is no reason to block during the simulation 253513570Sbrandon.potter@amd.com * as it only decreases simulator performance.) 253613570Sbrandon.potter@amd.com */ 253713570Sbrandon.potter@amd.com tp->tv_sec = 0; 253813570Sbrandon.potter@amd.com tp->tv_usec = 0; 253913570Sbrandon.potter@amd.com 254013570Sbrandon.potter@amd.com retval = select(nfds_h, 254113570Sbrandon.potter@amd.com fds_read_ptr ? &rd_h : nullptr, 254213570Sbrandon.potter@amd.com fds_writ_ptr ? &wr_h : nullptr, 254313570Sbrandon.potter@amd.com fds_excp_ptr ? &ex_h : nullptr, 254413570Sbrandon.potter@amd.com (timeval*)&*tp); 254513570Sbrandon.potter@amd.com } else { 254613570Sbrandon.potter@amd.com /** 254713570Sbrandon.potter@amd.com * If the timeval pointer is null, setup a new timeval structure to 254813570Sbrandon.potter@amd.com * pass into the host select call. Unfortunately, we will need to 254913570Sbrandon.potter@amd.com * manually check the return value and throw a retry fault if the 255013570Sbrandon.potter@amd.com * return value is zero. Allowing the system call to block will 255113570Sbrandon.potter@amd.com * likely deadlock the event queue. 255213570Sbrandon.potter@amd.com */ 255313570Sbrandon.potter@amd.com struct timeval tv = { 0, 0 }; 255413570Sbrandon.potter@amd.com 255513570Sbrandon.potter@amd.com retval = select(nfds_h, 255613570Sbrandon.potter@amd.com fds_read_ptr ? &rd_h : nullptr, 255713570Sbrandon.potter@amd.com fds_writ_ptr ? &wr_h : nullptr, 255813570Sbrandon.potter@amd.com fds_excp_ptr ? &ex_h : nullptr, 255913570Sbrandon.potter@amd.com &tv); 256013570Sbrandon.potter@amd.com 256113570Sbrandon.potter@amd.com if (retval == 0) { 256213570Sbrandon.potter@amd.com /** 256313570Sbrandon.potter@amd.com * If blocking indefinitely, check the signal list to see if a 256413570Sbrandon.potter@amd.com * signal would break the poll out of the retry cycle and try to 256513570Sbrandon.potter@amd.com * return the signal interrupt instead. 256613570Sbrandon.potter@amd.com */ 256713570Sbrandon.potter@amd.com for (auto sig : tc->getSystemPtr()->signalList) 256813570Sbrandon.potter@amd.com if (sig.receiver == p) 256913570Sbrandon.potter@amd.com return -EINTR; 257013570Sbrandon.potter@amd.com return SyscallReturn::retry(); 257113570Sbrandon.potter@amd.com } 257213570Sbrandon.potter@amd.com } 257313570Sbrandon.potter@amd.com 257413570Sbrandon.potter@amd.com if (retval == -1) 257513570Sbrandon.potter@amd.com return -errno; 257613570Sbrandon.potter@amd.com 257713570Sbrandon.potter@amd.com FD_ZERO((fd_set*)&*rd_t); 257813570Sbrandon.potter@amd.com FD_ZERO((fd_set*)&*wr_t); 257913570Sbrandon.potter@amd.com FD_ZERO((fd_set*)&*ex_t); 258013570Sbrandon.potter@amd.com 258113570Sbrandon.potter@amd.com /** 258213570Sbrandon.potter@amd.com * We need to translate the host file descriptor set into a target file 258313570Sbrandon.potter@amd.com * descriptor set. This involves both our internal process fd array 258413570Sbrandon.potter@amd.com * and the fd_set defined in header files. 258513570Sbrandon.potter@amd.com */ 258613570Sbrandon.potter@amd.com for (int i = 0; i < nfds_h; i++) { 258713570Sbrandon.potter@amd.com if (fds_read_ptr) { 258813570Sbrandon.potter@amd.com if (FD_ISSET(i, &rd_h)) 258913570Sbrandon.potter@amd.com FD_SET(trans_map[i], (fd_set*)&*rd_t); 259013570Sbrandon.potter@amd.com } 259113570Sbrandon.potter@amd.com 259213570Sbrandon.potter@amd.com if (fds_writ_ptr) { 259313570Sbrandon.potter@amd.com if (FD_ISSET(i, &wr_h)) 259413570Sbrandon.potter@amd.com FD_SET(trans_map[i], (fd_set*)&*wr_t); 259513570Sbrandon.potter@amd.com } 259613570Sbrandon.potter@amd.com 259713570Sbrandon.potter@amd.com if (fds_excp_ptr) { 259813570Sbrandon.potter@amd.com if (FD_ISSET(i, &ex_h)) 259913570Sbrandon.potter@amd.com FD_SET(trans_map[i], (fd_set*)&*ex_t); 260013570Sbrandon.potter@amd.com } 260113570Sbrandon.potter@amd.com } 260213570Sbrandon.potter@amd.com 260313570Sbrandon.potter@amd.com if (fds_read_ptr) 260413570Sbrandon.potter@amd.com rd_t.copyOut(tc->getMemProxy()); 260513570Sbrandon.potter@amd.com if (fds_writ_ptr) 260613570Sbrandon.potter@amd.com wr_t.copyOut(tc->getMemProxy()); 260713570Sbrandon.potter@amd.com if (fds_excp_ptr) 260813570Sbrandon.potter@amd.com ex_t.copyOut(tc->getMemProxy()); 260913570Sbrandon.potter@amd.com if (time_val_ptr) 261013570Sbrandon.potter@amd.com tp.copyOut(tc->getMemProxy()); 261113570Sbrandon.potter@amd.com 261213570Sbrandon.potter@amd.com return retval; 261313570Sbrandon.potter@amd.com} 261413570Sbrandon.potter@amd.com 261513570Sbrandon.potter@amd.comtemplate <class OS> 261613570Sbrandon.potter@amd.comSyscallReturn 261713570Sbrandon.potter@amd.comreadFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 261813570Sbrandon.potter@amd.com{ 261913570Sbrandon.potter@amd.com int index = 0; 262013570Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 262113570Sbrandon.potter@amd.com Addr buf_ptr = p->getSyscallArg(tc, index); 262213570Sbrandon.potter@amd.com int nbytes = p->getSyscallArg(tc, index); 262313570Sbrandon.potter@amd.com 262413570Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 262513570Sbrandon.potter@amd.com if (!hbfdp) 262613570Sbrandon.potter@amd.com return -EBADF; 262713570Sbrandon.potter@amd.com int sim_fd = hbfdp->getSimFD(); 262813570Sbrandon.potter@amd.com 262913570Sbrandon.potter@amd.com struct pollfd pfd; 263013570Sbrandon.potter@amd.com pfd.fd = sim_fd; 263113570Sbrandon.potter@amd.com pfd.events = POLLIN | POLLPRI; 263213570Sbrandon.potter@amd.com if ((poll(&pfd, 1, 0) == 0) 263313570Sbrandon.potter@amd.com && !(hbfdp->getFlags() & OS::TGT_O_NONBLOCK)) 263413570Sbrandon.potter@amd.com return SyscallReturn::retry(); 263513570Sbrandon.potter@amd.com 263613570Sbrandon.potter@amd.com BufferArg buf_arg(buf_ptr, nbytes); 263713570Sbrandon.potter@amd.com int bytes_read = read(sim_fd, buf_arg.bufferPtr(), nbytes); 263813570Sbrandon.potter@amd.com 263913570Sbrandon.potter@amd.com if (bytes_read > 0) 264013570Sbrandon.potter@amd.com buf_arg.copyOut(tc->getMemProxy()); 264113570Sbrandon.potter@amd.com 264213570Sbrandon.potter@amd.com return (bytes_read == -1) ? -errno : bytes_read; 264313570Sbrandon.potter@amd.com} 264413570Sbrandon.potter@amd.com 264513570Sbrandon.potter@amd.comtemplate <class OS> 264613570Sbrandon.potter@amd.comSyscallReturn 264713570Sbrandon.potter@amd.comwriteFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 264813570Sbrandon.potter@amd.com{ 264913570Sbrandon.potter@amd.com int index = 0; 265013570Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 265113570Sbrandon.potter@amd.com Addr buf_ptr = p->getSyscallArg(tc, index); 265213570Sbrandon.potter@amd.com int nbytes = p->getSyscallArg(tc, index); 265313570Sbrandon.potter@amd.com 265413570Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 265513570Sbrandon.potter@amd.com if (!hbfdp) 265613570Sbrandon.potter@amd.com return -EBADF; 265713570Sbrandon.potter@amd.com int sim_fd = hbfdp->getSimFD(); 265813570Sbrandon.potter@amd.com 265913570Sbrandon.potter@amd.com BufferArg buf_arg(buf_ptr, nbytes); 266013570Sbrandon.potter@amd.com buf_arg.copyIn(tc->getMemProxy()); 266113570Sbrandon.potter@amd.com 266213570Sbrandon.potter@amd.com struct pollfd pfd; 266313570Sbrandon.potter@amd.com pfd.fd = sim_fd; 266413570Sbrandon.potter@amd.com pfd.events = POLLOUT; 266513570Sbrandon.potter@amd.com 266613570Sbrandon.potter@amd.com /** 266713570Sbrandon.potter@amd.com * We don't want to poll on /dev/random. The kernel will not enable the 266813570Sbrandon.potter@amd.com * file descriptor for writing unless the entropy in the system falls 266913570Sbrandon.potter@amd.com * below write_wakeup_threshold. This is not guaranteed to happen 267013570Sbrandon.potter@amd.com * depending on host settings. 267113570Sbrandon.potter@amd.com */ 267213570Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(hbfdp); 267313570Sbrandon.potter@amd.com if (ffdp && (ffdp->getFileName() != "/dev/random")) { 267413570Sbrandon.potter@amd.com if (!poll(&pfd, 1, 0) && !(ffdp->getFlags() & OS::TGT_O_NONBLOCK)) 267513570Sbrandon.potter@amd.com return SyscallReturn::retry(); 267613570Sbrandon.potter@amd.com } 267713570Sbrandon.potter@amd.com 267813570Sbrandon.potter@amd.com int bytes_written = write(sim_fd, buf_arg.bufferPtr(), nbytes); 267913570Sbrandon.potter@amd.com 268013570Sbrandon.potter@amd.com if (bytes_written != -1) 268113570Sbrandon.potter@amd.com fsync(sim_fd); 268213570Sbrandon.potter@amd.com 268313570Sbrandon.potter@amd.com return (bytes_written == -1) ? -errno : bytes_written; 268413570Sbrandon.potter@amd.com} 268513570Sbrandon.potter@amd.com 268613570Sbrandon.potter@amd.comtemplate <class OS> 268713570Sbrandon.potter@amd.comSyscallReturn 268813570Sbrandon.potter@amd.comwait4Func(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 268913570Sbrandon.potter@amd.com{ 269013570Sbrandon.potter@amd.com int index = 0; 269113570Sbrandon.potter@amd.com pid_t pid = p->getSyscallArg(tc, index); 269213570Sbrandon.potter@amd.com Addr statPtr = p->getSyscallArg(tc, index); 269313570Sbrandon.potter@amd.com int options = p->getSyscallArg(tc, index); 269413570Sbrandon.potter@amd.com Addr rusagePtr = p->getSyscallArg(tc, index); 269513570Sbrandon.potter@amd.com 269613570Sbrandon.potter@amd.com if (rusagePtr) 269713570Sbrandon.potter@amd.com DPRINTFR(SyscallVerbose, 269813570Sbrandon.potter@amd.com "%d: %s: syscall wait4: rusage pointer provided however " 269913570Sbrandon.potter@amd.com "functionality not supported. Ignoring rusage pointer.\n", 270013570Sbrandon.potter@amd.com curTick(), tc->getCpuPtr()->name()); 270113570Sbrandon.potter@amd.com 270213570Sbrandon.potter@amd.com /** 270313570Sbrandon.potter@amd.com * Currently, wait4 is only implemented so that it will wait for children 270413570Sbrandon.potter@amd.com * exit conditions which are denoted by a SIGCHLD signals posted into the 270513570Sbrandon.potter@amd.com * system signal list. We return no additional information via any of the 270613570Sbrandon.potter@amd.com * parameters supplied to wait4. If nothing is found in the system signal 270713570Sbrandon.potter@amd.com * list, we will wait indefinitely for SIGCHLD to post by retrying the 270813570Sbrandon.potter@amd.com * call. 270913570Sbrandon.potter@amd.com */ 271013570Sbrandon.potter@amd.com System *sysh = tc->getSystemPtr(); 271113570Sbrandon.potter@amd.com std::list<BasicSignal>::iterator iter; 271213570Sbrandon.potter@amd.com for (iter=sysh->signalList.begin(); iter!=sysh->signalList.end(); iter++) { 271313570Sbrandon.potter@amd.com if (iter->receiver == p) { 271413570Sbrandon.potter@amd.com if (pid < -1) { 271513570Sbrandon.potter@amd.com if ((iter->sender->pgid() == -pid) 271613570Sbrandon.potter@amd.com && (iter->signalValue == OS::TGT_SIGCHLD)) 271713570Sbrandon.potter@amd.com goto success; 271813570Sbrandon.potter@amd.com } else if (pid == -1) { 271913570Sbrandon.potter@amd.com if (iter->signalValue == OS::TGT_SIGCHLD) 272013570Sbrandon.potter@amd.com goto success; 272113570Sbrandon.potter@amd.com } else if (pid == 0) { 272213570Sbrandon.potter@amd.com if ((iter->sender->pgid() == p->pgid()) 272313570Sbrandon.potter@amd.com && (iter->signalValue == OS::TGT_SIGCHLD)) 272413570Sbrandon.potter@amd.com goto success; 272513570Sbrandon.potter@amd.com } else { 272613570Sbrandon.potter@amd.com if ((iter->sender->pid() == pid) 272713570Sbrandon.potter@amd.com && (iter->signalValue == OS::TGT_SIGCHLD)) 272813570Sbrandon.potter@amd.com goto success; 272913570Sbrandon.potter@amd.com } 273013570Sbrandon.potter@amd.com } 273113570Sbrandon.potter@amd.com } 273213570Sbrandon.potter@amd.com 273313570Sbrandon.potter@amd.com return (options & OS::TGT_WNOHANG) ? 0 : SyscallReturn::retry(); 273413570Sbrandon.potter@amd.com 273513570Sbrandon.potter@amd.comsuccess: 273613570Sbrandon.potter@amd.com // Set status to EXITED for WIFEXITED evaluations. 273713570Sbrandon.potter@amd.com const int EXITED = 0; 273813570Sbrandon.potter@amd.com BufferArg statusBuf(statPtr, sizeof(int)); 273913570Sbrandon.potter@amd.com *(int *)statusBuf.bufferPtr() = EXITED; 274013570Sbrandon.potter@amd.com statusBuf.copyOut(tc->getMemProxy()); 274113570Sbrandon.potter@amd.com 274213570Sbrandon.potter@amd.com // Return the child PID. 274313570Sbrandon.potter@amd.com pid_t retval = iter->sender->pid(); 274413570Sbrandon.potter@amd.com sysh->signalList.erase(iter); 274513570Sbrandon.potter@amd.com return retval; 274613570Sbrandon.potter@amd.com} 274713570Sbrandon.potter@amd.com 274813570Sbrandon.potter@amd.comtemplate <class OS> 274913570Sbrandon.potter@amd.comSyscallReturn 275013570Sbrandon.potter@amd.comacceptFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 275113570Sbrandon.potter@amd.com{ 275213570Sbrandon.potter@amd.com struct sockaddr sa; 275313570Sbrandon.potter@amd.com socklen_t addrLen; 275413570Sbrandon.potter@amd.com int host_fd; 275513570Sbrandon.potter@amd.com int index = 0; 275613570Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 275713570Sbrandon.potter@amd.com Addr addrPtr = p->getSyscallArg(tc, index); 275813570Sbrandon.potter@amd.com Addr lenPtr = p->getSyscallArg(tc, index); 275913570Sbrandon.potter@amd.com 276013570Sbrandon.potter@amd.com BufferArg *lenBufPtr = nullptr; 276113570Sbrandon.potter@amd.com BufferArg *addrBufPtr = nullptr; 276213570Sbrandon.potter@amd.com 276313570Sbrandon.potter@amd.com auto sfdp = std::dynamic_pointer_cast<SocketFDEntry>((*p->fds)[tgt_fd]); 276413570Sbrandon.potter@amd.com if (!sfdp) 276513570Sbrandon.potter@amd.com return -EBADF; 276613570Sbrandon.potter@amd.com int sim_fd = sfdp->getSimFD(); 276713570Sbrandon.potter@amd.com 276813570Sbrandon.potter@amd.com /** 276913570Sbrandon.potter@amd.com * We poll the socket file descriptor first to guarantee that we do not 277013570Sbrandon.potter@amd.com * block on our accept call. The socket can be opened without the 277113570Sbrandon.potter@amd.com * non-blocking flag (it blocks). This will cause deadlocks between 277213570Sbrandon.potter@amd.com * communicating processes. 277313570Sbrandon.potter@amd.com */ 277413570Sbrandon.potter@amd.com struct pollfd pfd; 277513570Sbrandon.potter@amd.com pfd.fd = sim_fd; 277613570Sbrandon.potter@amd.com pfd.events = POLLIN | POLLPRI; 277713570Sbrandon.potter@amd.com if ((poll(&pfd, 1, 0) == 0) 277813570Sbrandon.potter@amd.com && !(sfdp->getFlags() & OS::TGT_O_NONBLOCK)) 277913570Sbrandon.potter@amd.com return SyscallReturn::retry(); 278013570Sbrandon.potter@amd.com 278113570Sbrandon.potter@amd.com if (lenPtr) { 278213570Sbrandon.potter@amd.com lenBufPtr = new BufferArg(lenPtr, sizeof(socklen_t)); 278313570Sbrandon.potter@amd.com lenBufPtr->copyIn(tc->getMemProxy()); 278413570Sbrandon.potter@amd.com memcpy(&addrLen, (socklen_t *)lenBufPtr->bufferPtr(), 278513570Sbrandon.potter@amd.com sizeof(socklen_t)); 278613570Sbrandon.potter@amd.com } 278713570Sbrandon.potter@amd.com 278813570Sbrandon.potter@amd.com if (addrPtr) { 278913570Sbrandon.potter@amd.com addrBufPtr = new BufferArg(addrPtr, sizeof(struct sockaddr)); 279013570Sbrandon.potter@amd.com addrBufPtr->copyIn(tc->getMemProxy()); 279113570Sbrandon.potter@amd.com memcpy(&sa, (struct sockaddr *)addrBufPtr->bufferPtr(), 279213570Sbrandon.potter@amd.com sizeof(struct sockaddr)); 279313570Sbrandon.potter@amd.com } 279413570Sbrandon.potter@amd.com 279513570Sbrandon.potter@amd.com host_fd = accept(sim_fd, &sa, &addrLen); 279613570Sbrandon.potter@amd.com 279713570Sbrandon.potter@amd.com if (host_fd == -1) 279813570Sbrandon.potter@amd.com return -errno; 279913570Sbrandon.potter@amd.com 280013570Sbrandon.potter@amd.com if (addrPtr) { 280113570Sbrandon.potter@amd.com memcpy(addrBufPtr->bufferPtr(), &sa, sizeof(sa)); 280213570Sbrandon.potter@amd.com addrBufPtr->copyOut(tc->getMemProxy()); 280313570Sbrandon.potter@amd.com delete(addrBufPtr); 280413570Sbrandon.potter@amd.com } 280513570Sbrandon.potter@amd.com 280613570Sbrandon.potter@amd.com if (lenPtr) { 280713570Sbrandon.potter@amd.com *(socklen_t *)lenBufPtr->bufferPtr() = addrLen; 280813570Sbrandon.potter@amd.com lenBufPtr->copyOut(tc->getMemProxy()); 280913570Sbrandon.potter@amd.com delete(lenBufPtr); 281013570Sbrandon.potter@amd.com } 281113570Sbrandon.potter@amd.com 281213570Sbrandon.potter@amd.com auto afdp = std::make_shared<SocketFDEntry>(host_fd, sfdp->_domain, 281313570Sbrandon.potter@amd.com sfdp->_type, sfdp->_protocol); 281413570Sbrandon.potter@amd.com return p->fds->allocFD(afdp); 281513570Sbrandon.potter@amd.com} 281613570Sbrandon.potter@amd.com 28171354SN/A#endif // __SIM_SYSCALL_EMUL_HH__ 2818