syscall_emul.hh revision 13649
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); 4449112Smarc.orr@gmail.com } 4459112Smarc.orr@gmail.com 44611911SBrandon.Potter@amd.com warn("futex: op %d not implemented; ignoring.", op); 44711911SBrandon.Potter@amd.com return -ENOSYS; 4489112Smarc.orr@gmail.com} 4499112Smarc.orr@gmail.com 4502238SN/A 4512238SN/A/// Pseudo Funcs - These functions use a different return convension, 4522238SN/A/// returning a second value in a register other than the normal return register 4532238SN/ASyscallReturn pipePseudoFunc(SyscallDesc *desc, int num, 45411851Sbrandon.potter@amd.com Process *process, ThreadContext *tc); 4552238SN/A 4562238SN/A/// Target getpidPseudo() handler. 4572238SN/ASyscallReturn getpidPseudoFunc(SyscallDesc *desc, int num, 45811851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 4592238SN/A 4602238SN/A/// Target getuidPseudo() handler. 4612238SN/ASyscallReturn getuidPseudoFunc(SyscallDesc *desc, int num, 46211851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 4632238SN/A 4642238SN/A/// Target getgidPseudo() handler. 4652238SN/ASyscallReturn getgidPseudoFunc(SyscallDesc *desc, int num, 46611851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 4672238SN/A 4682238SN/A 4691354SN/A/// A readable name for 1,000,000, for converting microseconds to seconds. 4701354SN/Aconst int one_million = 1000000; 47110796Sbrandon.potter@amd.com/// A readable name for 1,000,000,000, for converting nanoseconds to seconds. 47210796Sbrandon.potter@amd.comconst int one_billion = 1000000000; 4731354SN/A 4741354SN/A/// Approximate seconds since the epoch (1/1/1970). About a billion, 4751354SN/A/// by my reckoning. We want to keep this a constant (not use the 4761354SN/A/// real-world time) to keep simulations repeatable. 4771354SN/Aconst unsigned seconds_since_epoch = 1000000000; 4781354SN/A 4791354SN/A/// Helper function to convert current elapsed time to seconds and 4801354SN/A/// microseconds. 4811354SN/Atemplate <class T1, class T2> 4821354SN/Avoid 48310796Sbrandon.potter@amd.comgetElapsedTimeMicro(T1 &sec, T2 &usec) 4841354SN/A{ 48510796Sbrandon.potter@amd.com uint64_t elapsed_usecs = curTick() / SimClock::Int::us; 4861354SN/A sec = elapsed_usecs / one_million; 4871354SN/A usec = elapsed_usecs % one_million; 4881354SN/A} 4891354SN/A 49010796Sbrandon.potter@amd.com/// Helper function to convert current elapsed time to seconds and 49110796Sbrandon.potter@amd.com/// nanoseconds. 49210796Sbrandon.potter@amd.comtemplate <class T1, class T2> 49310796Sbrandon.potter@amd.comvoid 49410796Sbrandon.potter@amd.comgetElapsedTimeNano(T1 &sec, T2 &nsec) 49510796Sbrandon.potter@amd.com{ 49610796Sbrandon.potter@amd.com uint64_t elapsed_nsecs = curTick() / SimClock::Int::ns; 49710796Sbrandon.potter@amd.com sec = elapsed_nsecs / one_billion; 49810796Sbrandon.potter@amd.com nsec = elapsed_nsecs % one_billion; 49910796Sbrandon.potter@amd.com} 50010796Sbrandon.potter@amd.com 501360SN/A////////////////////////////////////////////////////////////////////// 502360SN/A// 503360SN/A// The following emulation functions are generic, but need to be 504360SN/A// templated to account for differences in types, constants, etc. 505360SN/A// 506360SN/A////////////////////////////////////////////////////////////////////// 507360SN/A 50811759Sbrandon.potter@amd.com typedef struct statfs hst_statfs; 5093113Sgblack@eecs.umich.edu#if NO_STAT64 5103113Sgblack@eecs.umich.edu typedef struct stat hst_stat; 5113113Sgblack@eecs.umich.edu typedef struct stat hst_stat64; 5123113Sgblack@eecs.umich.edu#else 5133113Sgblack@eecs.umich.edu typedef struct stat hst_stat; 5143113Sgblack@eecs.umich.edu typedef struct stat64 hst_stat64; 5153113Sgblack@eecs.umich.edu#endif 5163113Sgblack@eecs.umich.edu 5173113Sgblack@eecs.umich.edu//// Helper function to convert a host stat buffer to a target stat 5183113Sgblack@eecs.umich.edu//// buffer. Also copies the target buffer out to the simulated 5193113Sgblack@eecs.umich.edu//// memory space. Used by stat(), fstat(), and lstat(). 5203113Sgblack@eecs.umich.edu 5213113Sgblack@eecs.umich.edutemplate <typename target_stat, typename host_stat> 52212032Sandreas.sandberg@arm.comvoid 5233113Sgblack@eecs.umich.educonvertStatBuf(target_stat &tgt, host_stat *host, bool fakeTTY = false) 5243113Sgblack@eecs.umich.edu{ 5254189Sgblack@eecs.umich.edu using namespace TheISA; 5264189Sgblack@eecs.umich.edu 5273113Sgblack@eecs.umich.edu if (fakeTTY) 5283113Sgblack@eecs.umich.edu tgt->st_dev = 0xA; 5293113Sgblack@eecs.umich.edu else 5303113Sgblack@eecs.umich.edu tgt->st_dev = host->st_dev; 5318737Skoansin.tan@gmail.com tgt->st_dev = TheISA::htog(tgt->st_dev); 5323113Sgblack@eecs.umich.edu tgt->st_ino = host->st_ino; 5338737Skoansin.tan@gmail.com tgt->st_ino = TheISA::htog(tgt->st_ino); 5343277Sgblack@eecs.umich.edu tgt->st_mode = host->st_mode; 5355515SMichael.Adler@intel.com if (fakeTTY) { 5365515SMichael.Adler@intel.com // Claim to be a character device 5375515SMichael.Adler@intel.com tgt->st_mode &= ~S_IFMT; // Clear S_IFMT 5385515SMichael.Adler@intel.com tgt->st_mode |= S_IFCHR; // Set S_IFCHR 5395515SMichael.Adler@intel.com } 5408737Skoansin.tan@gmail.com tgt->st_mode = TheISA::htog(tgt->st_mode); 5413277Sgblack@eecs.umich.edu tgt->st_nlink = host->st_nlink; 5428737Skoansin.tan@gmail.com tgt->st_nlink = TheISA::htog(tgt->st_nlink); 5433277Sgblack@eecs.umich.edu tgt->st_uid = host->st_uid; 5448737Skoansin.tan@gmail.com tgt->st_uid = TheISA::htog(tgt->st_uid); 5453277Sgblack@eecs.umich.edu tgt->st_gid = host->st_gid; 5468737Skoansin.tan@gmail.com tgt->st_gid = TheISA::htog(tgt->st_gid); 5473113Sgblack@eecs.umich.edu if (fakeTTY) 5483113Sgblack@eecs.umich.edu tgt->st_rdev = 0x880d; 5493113Sgblack@eecs.umich.edu else 5503113Sgblack@eecs.umich.edu tgt->st_rdev = host->st_rdev; 5518737Skoansin.tan@gmail.com tgt->st_rdev = TheISA::htog(tgt->st_rdev); 5523113Sgblack@eecs.umich.edu tgt->st_size = host->st_size; 5538737Skoansin.tan@gmail.com tgt->st_size = TheISA::htog(tgt->st_size); 5543114Sgblack@eecs.umich.edu tgt->st_atimeX = host->st_atime; 5558737Skoansin.tan@gmail.com tgt->st_atimeX = TheISA::htog(tgt->st_atimeX); 5563114Sgblack@eecs.umich.edu tgt->st_mtimeX = host->st_mtime; 5578737Skoansin.tan@gmail.com tgt->st_mtimeX = TheISA::htog(tgt->st_mtimeX); 5583114Sgblack@eecs.umich.edu tgt->st_ctimeX = host->st_ctime; 5598737Skoansin.tan@gmail.com tgt->st_ctimeX = TheISA::htog(tgt->st_ctimeX); 56011906SBrandon.Potter@amd.com // Force the block size to be 8KB. This helps to ensure buffered io works 5614061Sgblack@eecs.umich.edu // consistently across different hosts. 5624061Sgblack@eecs.umich.edu tgt->st_blksize = 0x2000; 5638737Skoansin.tan@gmail.com tgt->st_blksize = TheISA::htog(tgt->st_blksize); 5643113Sgblack@eecs.umich.edu tgt->st_blocks = host->st_blocks; 5658737Skoansin.tan@gmail.com tgt->st_blocks = TheISA::htog(tgt->st_blocks); 5663113Sgblack@eecs.umich.edu} 5673113Sgblack@eecs.umich.edu 5683113Sgblack@eecs.umich.edu// Same for stat64 5693113Sgblack@eecs.umich.edu 5703113Sgblack@eecs.umich.edutemplate <typename target_stat, typename host_stat64> 57112032Sandreas.sandberg@arm.comvoid 5723113Sgblack@eecs.umich.educonvertStat64Buf(target_stat &tgt, host_stat64 *host, bool fakeTTY = false) 5733113Sgblack@eecs.umich.edu{ 5744189Sgblack@eecs.umich.edu using namespace TheISA; 5754189Sgblack@eecs.umich.edu 5763113Sgblack@eecs.umich.edu convertStatBuf<target_stat, host_stat64>(tgt, host, fakeTTY); 5773113Sgblack@eecs.umich.edu#if defined(STAT_HAVE_NSEC) 5783113Sgblack@eecs.umich.edu tgt->st_atime_nsec = host->st_atime_nsec; 5798737Skoansin.tan@gmail.com tgt->st_atime_nsec = TheISA::htog(tgt->st_atime_nsec); 5803113Sgblack@eecs.umich.edu tgt->st_mtime_nsec = host->st_mtime_nsec; 5818737Skoansin.tan@gmail.com tgt->st_mtime_nsec = TheISA::htog(tgt->st_mtime_nsec); 5823113Sgblack@eecs.umich.edu tgt->st_ctime_nsec = host->st_ctime_nsec; 5838737Skoansin.tan@gmail.com tgt->st_ctime_nsec = TheISA::htog(tgt->st_ctime_nsec); 5843113Sgblack@eecs.umich.edu#else 5853113Sgblack@eecs.umich.edu tgt->st_atime_nsec = 0; 5863113Sgblack@eecs.umich.edu tgt->st_mtime_nsec = 0; 5873113Sgblack@eecs.umich.edu tgt->st_ctime_nsec = 0; 5883113Sgblack@eecs.umich.edu#endif 5893113Sgblack@eecs.umich.edu} 5903113Sgblack@eecs.umich.edu 59111906SBrandon.Potter@amd.com// Here are a couple of convenience functions 5923113Sgblack@eecs.umich.edutemplate<class OS> 59312032Sandreas.sandberg@arm.comvoid 5948852Sandreas.hansson@arm.comcopyOutStatBuf(SETranslatingPortProxy &mem, Addr addr, 59511906SBrandon.Potter@amd.com hst_stat *host, bool fakeTTY = false) 5963113Sgblack@eecs.umich.edu{ 5973113Sgblack@eecs.umich.edu typedef TypedBufferArg<typename OS::tgt_stat> tgt_stat_buf; 5983113Sgblack@eecs.umich.edu tgt_stat_buf tgt(addr); 5993113Sgblack@eecs.umich.edu convertStatBuf<tgt_stat_buf, hst_stat>(tgt, host, fakeTTY); 6003113Sgblack@eecs.umich.edu tgt.copyOut(mem); 6013113Sgblack@eecs.umich.edu} 6023113Sgblack@eecs.umich.edu 6033113Sgblack@eecs.umich.edutemplate<class OS> 60412032Sandreas.sandberg@arm.comvoid 6058852Sandreas.hansson@arm.comcopyOutStat64Buf(SETranslatingPortProxy &mem, Addr addr, 60611906SBrandon.Potter@amd.com hst_stat64 *host, bool fakeTTY = false) 6073113Sgblack@eecs.umich.edu{ 6083113Sgblack@eecs.umich.edu typedef TypedBufferArg<typename OS::tgt_stat64> tgt_stat_buf; 6093113Sgblack@eecs.umich.edu tgt_stat_buf tgt(addr); 6106686Stjones1@inf.ed.ac.uk convertStat64Buf<tgt_stat_buf, hst_stat64>(tgt, host, fakeTTY); 6113113Sgblack@eecs.umich.edu tgt.copyOut(mem); 6123113Sgblack@eecs.umich.edu} 6133113Sgblack@eecs.umich.edu 61411759Sbrandon.potter@amd.comtemplate <class OS> 61512032Sandreas.sandberg@arm.comvoid 61611759Sbrandon.potter@amd.comcopyOutStatfsBuf(SETranslatingPortProxy &mem, Addr addr, 61711759Sbrandon.potter@amd.com hst_statfs *host) 61811759Sbrandon.potter@amd.com{ 61911759Sbrandon.potter@amd.com TypedBufferArg<typename OS::tgt_statfs> tgt(addr); 62011759Sbrandon.potter@amd.com 62111812Sbaz21@cam.ac.uk tgt->f_type = TheISA::htog(host->f_type); 62211812Sbaz21@cam.ac.uk#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) 62311812Sbaz21@cam.ac.uk tgt->f_bsize = TheISA::htog(host->f_iosize); 62411759Sbrandon.potter@amd.com#else 62511812Sbaz21@cam.ac.uk tgt->f_bsize = TheISA::htog(host->f_bsize); 62611759Sbrandon.potter@amd.com#endif 62711759Sbrandon.potter@amd.com tgt->f_blocks = TheISA::htog(host->f_blocks); 62811759Sbrandon.potter@amd.com tgt->f_bfree = TheISA::htog(host->f_bfree); 62911759Sbrandon.potter@amd.com tgt->f_bavail = TheISA::htog(host->f_bavail); 63011759Sbrandon.potter@amd.com tgt->f_files = TheISA::htog(host->f_files); 63111759Sbrandon.potter@amd.com tgt->f_ffree = TheISA::htog(host->f_ffree); 63211759Sbrandon.potter@amd.com memcpy(&tgt->f_fsid, &host->f_fsid, sizeof(host->f_fsid)); 63311812Sbaz21@cam.ac.uk#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) 63411812Sbaz21@cam.ac.uk tgt->f_namelen = TheISA::htog(host->f_namemax); 63511812Sbaz21@cam.ac.uk tgt->f_frsize = TheISA::htog(host->f_bsize); 63611812Sbaz21@cam.ac.uk#elif defined(__APPLE__) 63711812Sbaz21@cam.ac.uk tgt->f_namelen = 0; 63811812Sbaz21@cam.ac.uk tgt->f_frsize = 0; 63911812Sbaz21@cam.ac.uk#else 64011759Sbrandon.potter@amd.com tgt->f_namelen = TheISA::htog(host->f_namelen); 64111759Sbrandon.potter@amd.com tgt->f_frsize = TheISA::htog(host->f_frsize); 64211812Sbaz21@cam.ac.uk#endif 64311812Sbaz21@cam.ac.uk#if defined(__linux__) 64411759Sbrandon.potter@amd.com memcpy(&tgt->f_spare, &host->f_spare, sizeof(host->f_spare)); 64511812Sbaz21@cam.ac.uk#else 64611812Sbaz21@cam.ac.uk /* 64711812Sbaz21@cam.ac.uk * The fields are different sizes per OS. Don't bother with 64811812Sbaz21@cam.ac.uk * f_spare or f_reserved on non-Linux for now. 64911812Sbaz21@cam.ac.uk */ 65011812Sbaz21@cam.ac.uk memset(&tgt->f_spare, 0, sizeof(tgt->f_spare)); 65111812Sbaz21@cam.ac.uk#endif 65211759Sbrandon.potter@amd.com 65311759Sbrandon.potter@amd.com tgt.copyOut(mem); 65411759Sbrandon.potter@amd.com} 65511759Sbrandon.potter@amd.com 656378SN/A/// Target ioctl() handler. For the most part, programs call ioctl() 657378SN/A/// only to find out if their stdout is a tty, to determine whether to 6589141Smarc.orr@gmail.com/// do line or block buffering. We always claim that output fds are 6599141Smarc.orr@gmail.com/// not TTYs to provide repeatable results. 660360SN/Atemplate <class OS> 6611450SN/ASyscallReturn 66211856Sbrandon.potter@amd.comioctlFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 663360SN/A{ 6646701Sgblack@eecs.umich.edu int index = 0; 66511856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 66611856Sbrandon.potter@amd.com unsigned req = p->getSyscallArg(tc, index); 667360SN/A 66810930Sbrandon.potter@amd.com DPRINTF(SyscallVerbose, "ioctl(%d, 0x%x, ...)\n", tgt_fd, req); 669360SN/A 67011856Sbrandon.potter@amd.com if (OS::isTtyReq(req)) 67111856Sbrandon.potter@amd.com return -ENOTTY; 67210496Ssteve.reinhardt@amd.com 67311856Sbrandon.potter@amd.com auto dfdp = std::dynamic_pointer_cast<DeviceFDEntry>((*p->fds)[tgt_fd]); 67411856Sbrandon.potter@amd.com if (!dfdp) 6751458SN/A return -EBADF; 676360SN/A 67711856Sbrandon.potter@amd.com /** 67811856Sbrandon.potter@amd.com * If the driver is valid, issue the ioctl through it. Otherwise, 67911856Sbrandon.potter@amd.com * there's an implicit assumption that the device is a TTY type and we 68011856Sbrandon.potter@amd.com * return that we do not have a valid TTY. 68111856Sbrandon.potter@amd.com */ 68211856Sbrandon.potter@amd.com EmulatedDriver *emul_driver = dfdp->getDriver(); 68311856Sbrandon.potter@amd.com if (emul_driver) 68411856Sbrandon.potter@amd.com return emul_driver->ioctl(p, tc, req); 68510496Ssteve.reinhardt@amd.com 68611856Sbrandon.potter@amd.com /** 68711856Sbrandon.potter@amd.com * For lack of a better return code, return ENOTTY. Ideally, we should 68811856Sbrandon.potter@amd.com * return something better here, but at least we issue the warning. 68911856Sbrandon.potter@amd.com */ 69011856Sbrandon.potter@amd.com warn("Unsupported ioctl call (return ENOTTY): ioctl(%d, 0x%x, ...) @ \n", 69110930Sbrandon.potter@amd.com tgt_fd, req, tc->pcState()); 6929141Smarc.orr@gmail.com return -ENOTTY; 693360SN/A} 694360SN/A 695360SN/Atemplate <class OS> 69611907SBrandon.Potter@amd.comSyscallReturn 69711907SBrandon.Potter@amd.comopenImpl(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc, 69811907SBrandon.Potter@amd.com bool isopenat) 699360SN/A{ 70011907SBrandon.Potter@amd.com int index = 0; 70111907SBrandon.Potter@amd.com int tgt_dirfd = -1; 70211907SBrandon.Potter@amd.com 70311907SBrandon.Potter@amd.com /** 70411907SBrandon.Potter@amd.com * If using the openat variant, read in the target directory file 70511907SBrandon.Potter@amd.com * descriptor from the simulated process. 70611907SBrandon.Potter@amd.com */ 70711907SBrandon.Potter@amd.com if (isopenat) 70811907SBrandon.Potter@amd.com tgt_dirfd = p->getSyscallArg(tc, index); 70911907SBrandon.Potter@amd.com 71011907SBrandon.Potter@amd.com /** 71111907SBrandon.Potter@amd.com * Retrieve the simulated process' memory proxy and then read in the path 71211907SBrandon.Potter@amd.com * string from that memory space into the host's working memory space. 71311907SBrandon.Potter@amd.com */ 714360SN/A std::string path; 71511907SBrandon.Potter@amd.com if (!tc->getMemProxy().tryReadString(path, p->getSyscallArg(tc, index))) 7161458SN/A return -EFAULT; 717360SN/A 71811907SBrandon.Potter@amd.com#ifdef __CYGWIN32__ 71911907SBrandon.Potter@amd.com int host_flags = O_BINARY; 72011907SBrandon.Potter@amd.com#else 72111907SBrandon.Potter@amd.com int host_flags = 0; 72211907SBrandon.Potter@amd.com#endif 72311907SBrandon.Potter@amd.com /** 72411907SBrandon.Potter@amd.com * Translate target flags into host flags. Flags exist which are not 72511907SBrandon.Potter@amd.com * ported between architectures which can cause check failures. 72611907SBrandon.Potter@amd.com */ 72711907SBrandon.Potter@amd.com int tgt_flags = p->getSyscallArg(tc, index); 728360SN/A for (int i = 0; i < OS::NUM_OPEN_FLAGS; i++) { 72911907SBrandon.Potter@amd.com if (tgt_flags & OS::openFlagTable[i].tgtFlag) { 73011907SBrandon.Potter@amd.com tgt_flags &= ~OS::openFlagTable[i].tgtFlag; 73111907SBrandon.Potter@amd.com host_flags |= OS::openFlagTable[i].hostFlag; 732360SN/A } 733360SN/A } 73411907SBrandon.Potter@amd.com if (tgt_flags) { 73511907SBrandon.Potter@amd.com warn("open%s: cannot decode flags 0x%x", 73611907SBrandon.Potter@amd.com isopenat ? "at" : "", tgt_flags); 73711907SBrandon.Potter@amd.com } 738360SN/A#ifdef __CYGWIN32__ 73911907SBrandon.Potter@amd.com host_flags |= O_BINARY; 740360SN/A#endif 741360SN/A 74211907SBrandon.Potter@amd.com int mode = p->getSyscallArg(tc, index); 7433669Sbinkertn@umich.edu 74411907SBrandon.Potter@amd.com /** 74511907SBrandon.Potter@amd.com * If the simulated process called open or openat with AT_FDCWD specified, 74611907SBrandon.Potter@amd.com * take the current working directory value which was passed into the 74711907SBrandon.Potter@amd.com * process class as a Python parameter and append the current path to 74811907SBrandon.Potter@amd.com * create a full path. 74911907SBrandon.Potter@amd.com * Otherwise, openat with a valid target directory file descriptor has 75011907SBrandon.Potter@amd.com * been called. If the path option, which was passed in as a parameter, 75111907SBrandon.Potter@amd.com * is not absolute, retrieve the directory file descriptor's path and 75211907SBrandon.Potter@amd.com * prepend it to the path passed in as a parameter. 75311907SBrandon.Potter@amd.com * In every case, we should have a full path (which is relevant to the 75411907SBrandon.Potter@amd.com * host) to work with after this block has been passed. 75511907SBrandon.Potter@amd.com */ 75611907SBrandon.Potter@amd.com if (!isopenat || (isopenat && tgt_dirfd == OS::TGT_AT_FDCWD)) { 75711907SBrandon.Potter@amd.com path = p->fullPath(path); 75811907SBrandon.Potter@amd.com } else if (!startswith(path, "/")) { 75911907SBrandon.Potter@amd.com std::shared_ptr<FDEntry> fdep = ((*p->fds)[tgt_dirfd]); 76011907SBrandon.Potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(fdep); 76111907SBrandon.Potter@amd.com if (!ffdp) 76211907SBrandon.Potter@amd.com return -EBADF; 76313371Sciro.santilli@arm.com path.insert(0, ffdp->getFileName() + "/"); 76411907SBrandon.Potter@amd.com } 7651706SN/A 76611907SBrandon.Potter@amd.com /** 76711907SBrandon.Potter@amd.com * Since this is an emulated environment, we create pseudo file 76811907SBrandon.Potter@amd.com * descriptors for device requests that have been registered with 76911907SBrandon.Potter@amd.com * the process class through Python; this allows us to create a file 77011907SBrandon.Potter@amd.com * descriptor for subsequent ioctl or mmap calls. 77111907SBrandon.Potter@amd.com */ 77210496Ssteve.reinhardt@amd.com if (startswith(path, "/dev/")) { 77310496Ssteve.reinhardt@amd.com std::string filename = path.substr(strlen("/dev/")); 77411907SBrandon.Potter@amd.com EmulatedDriver *drv = p->findDriver(filename); 77511907SBrandon.Potter@amd.com if (drv) { 77611907SBrandon.Potter@amd.com DPRINTF_SYSCALL(Verbose, "open%s: passing call to " 77711907SBrandon.Potter@amd.com "driver open with path[%s]\n", 77811907SBrandon.Potter@amd.com isopenat ? "at" : "", path.c_str()); 77911907SBrandon.Potter@amd.com return drv->open(p, tc, mode, host_flags); 78010496Ssteve.reinhardt@amd.com } 78111907SBrandon.Potter@amd.com /** 78211907SBrandon.Potter@amd.com * Fall through here for pass through to host devices, such 78311907SBrandon.Potter@amd.com * as /dev/zero 78411907SBrandon.Potter@amd.com */ 78510496Ssteve.reinhardt@amd.com } 78610496Ssteve.reinhardt@amd.com 78711907SBrandon.Potter@amd.com /** 78811907SBrandon.Potter@amd.com * Some special paths and files cannot be called on the host and need 78911907SBrandon.Potter@amd.com * to be handled as special cases inside the simulator. 79011907SBrandon.Potter@amd.com * If the full path that was created above does not match any of the 79111907SBrandon.Potter@amd.com * special cases, pass it through to the open call on the host to let 79211907SBrandon.Potter@amd.com * the host open the file on our behalf. 79311907SBrandon.Potter@amd.com * If the host cannot open the file, return the host's error code back 79411907SBrandon.Potter@amd.com * through the system call to the simulated process. 79511907SBrandon.Potter@amd.com */ 79611907SBrandon.Potter@amd.com int sim_fd = -1; 79711907SBrandon.Potter@amd.com std::vector<std::string> special_paths = 79811907SBrandon.Potter@amd.com { "/proc/", "/system/", "/sys/", "/platform/", "/etc/passwd" }; 79911907SBrandon.Potter@amd.com for (auto entry : special_paths) { 80011907SBrandon.Potter@amd.com if (startswith(path, entry)) 80111907SBrandon.Potter@amd.com sim_fd = OS::openSpecialFile(path, p, tc); 80211907SBrandon.Potter@amd.com } 80311907SBrandon.Potter@amd.com if (sim_fd == -1) { 80411907SBrandon.Potter@amd.com sim_fd = open(path.c_str(), host_flags, mode); 80511907SBrandon.Potter@amd.com } 80611907SBrandon.Potter@amd.com if (sim_fd == -1) { 80711907SBrandon.Potter@amd.com int local = -errno; 80811907SBrandon.Potter@amd.com DPRINTF_SYSCALL(Verbose, "open%s: failed -> path:%s\n", 80911907SBrandon.Potter@amd.com isopenat ? "at" : "", path.c_str()); 81011907SBrandon.Potter@amd.com return local; 81111907SBrandon.Potter@amd.com } 812360SN/A 81311907SBrandon.Potter@amd.com /** 81411907SBrandon.Potter@amd.com * The file was opened successfully and needs to be recorded in the 81511907SBrandon.Potter@amd.com * process' file descriptor array so that it can be retrieved later. 81611907SBrandon.Potter@amd.com * The target file descriptor that is chosen will be the lowest unused 81711907SBrandon.Potter@amd.com * file descriptor. 81811907SBrandon.Potter@amd.com * Return the indirect target file descriptor back to the simulated 81911907SBrandon.Potter@amd.com * process to act as a handle for the opened file. 82011907SBrandon.Potter@amd.com */ 82111907SBrandon.Potter@amd.com auto ffdp = std::make_shared<FileFDEntry>(sim_fd, host_flags, path, 0); 82211907SBrandon.Potter@amd.com int tgt_fd = p->fds->allocFD(ffdp); 82311907SBrandon.Potter@amd.com DPRINTF_SYSCALL(Verbose, "open%s: sim_fd[%d], target_fd[%d] -> path:%s\n", 82411907SBrandon.Potter@amd.com isopenat ? "at" : "", sim_fd, tgt_fd, path.c_str()); 82511907SBrandon.Potter@amd.com return tgt_fd; 826360SN/A} 827360SN/A 82810027SChris.Adeniyi-Jones@arm.com/// Target open() handler. 82910027SChris.Adeniyi-Jones@arm.comtemplate <class OS> 83010027SChris.Adeniyi-Jones@arm.comSyscallReturn 83111851Sbrandon.potter@amd.comopenFunc(SyscallDesc *desc, int callnum, Process *process, 83210027SChris.Adeniyi-Jones@arm.com ThreadContext *tc) 83310027SChris.Adeniyi-Jones@arm.com{ 83411907SBrandon.Potter@amd.com return openImpl<OS>(desc, callnum, process, tc, false); 83510027SChris.Adeniyi-Jones@arm.com} 83610027SChris.Adeniyi-Jones@arm.com 83710027SChris.Adeniyi-Jones@arm.com/// Target openat() handler. 83810027SChris.Adeniyi-Jones@arm.comtemplate <class OS> 83910027SChris.Adeniyi-Jones@arm.comSyscallReturn 84011851Sbrandon.potter@amd.comopenatFunc(SyscallDesc *desc, int callnum, Process *process, 84111851Sbrandon.potter@amd.com ThreadContext *tc) 84210027SChris.Adeniyi-Jones@arm.com{ 84311907SBrandon.Potter@amd.com return openImpl<OS>(desc, callnum, process, tc, true); 84410027SChris.Adeniyi-Jones@arm.com} 84510027SChris.Adeniyi-Jones@arm.com 84610633Smichaelupton@gmail.com/// Target unlinkat() handler. 84710633Smichaelupton@gmail.comtemplate <class OS> 84810633Smichaelupton@gmail.comSyscallReturn 84911851Sbrandon.potter@amd.comunlinkatFunc(SyscallDesc *desc, int callnum, Process *process, 85010633Smichaelupton@gmail.com ThreadContext *tc) 85110633Smichaelupton@gmail.com{ 85210633Smichaelupton@gmail.com int index = 0; 85310633Smichaelupton@gmail.com int dirfd = process->getSyscallArg(tc, index); 85410633Smichaelupton@gmail.com if (dirfd != OS::TGT_AT_FDCWD) 85510633Smichaelupton@gmail.com warn("unlinkat: first argument not AT_FDCWD; unlikely to work"); 85610633Smichaelupton@gmail.com 85710633Smichaelupton@gmail.com return unlinkHelper(desc, callnum, process, tc, 1); 85810633Smichaelupton@gmail.com} 85910633Smichaelupton@gmail.com 86010203SAli.Saidi@ARM.com/// Target facessat() handler 86110203SAli.Saidi@ARM.comtemplate <class OS> 86210203SAli.Saidi@ARM.comSyscallReturn 86311851Sbrandon.potter@amd.comfaccessatFunc(SyscallDesc *desc, int callnum, Process *process, 86411851Sbrandon.potter@amd.com ThreadContext *tc) 86510203SAli.Saidi@ARM.com{ 86610203SAli.Saidi@ARM.com int index = 0; 86710203SAli.Saidi@ARM.com int dirfd = process->getSyscallArg(tc, index); 86810203SAli.Saidi@ARM.com if (dirfd != OS::TGT_AT_FDCWD) 86910203SAli.Saidi@ARM.com warn("faccessat: first argument not AT_FDCWD; unlikely to work"); 87010203SAli.Saidi@ARM.com return accessFunc(desc, callnum, process, tc, 1); 87110203SAli.Saidi@ARM.com} 87210203SAli.Saidi@ARM.com 87310203SAli.Saidi@ARM.com/// Target readlinkat() handler 87410203SAli.Saidi@ARM.comtemplate <class OS> 87510203SAli.Saidi@ARM.comSyscallReturn 87611851Sbrandon.potter@amd.comreadlinkatFunc(SyscallDesc *desc, int callnum, Process *process, 87711851Sbrandon.potter@amd.com ThreadContext *tc) 87810203SAli.Saidi@ARM.com{ 87910203SAli.Saidi@ARM.com int index = 0; 88010203SAli.Saidi@ARM.com int dirfd = process->getSyscallArg(tc, index); 88110203SAli.Saidi@ARM.com if (dirfd != OS::TGT_AT_FDCWD) 88210203SAli.Saidi@ARM.com warn("openat: first argument not AT_FDCWD; unlikely to work"); 88310203SAli.Saidi@ARM.com return readlinkFunc(desc, callnum, process, tc, 1); 88410203SAli.Saidi@ARM.com} 88510203SAli.Saidi@ARM.com 88610850SGiacomo.Gabrielli@arm.com/// Target renameat() handler. 88710850SGiacomo.Gabrielli@arm.comtemplate <class OS> 88810850SGiacomo.Gabrielli@arm.comSyscallReturn 88911851Sbrandon.potter@amd.comrenameatFunc(SyscallDesc *desc, int callnum, Process *process, 89010850SGiacomo.Gabrielli@arm.com ThreadContext *tc) 89110850SGiacomo.Gabrielli@arm.com{ 89210850SGiacomo.Gabrielli@arm.com int index = 0; 89310850SGiacomo.Gabrielli@arm.com 89410850SGiacomo.Gabrielli@arm.com int olddirfd = process->getSyscallArg(tc, index); 89510850SGiacomo.Gabrielli@arm.com if (olddirfd != OS::TGT_AT_FDCWD) 89610850SGiacomo.Gabrielli@arm.com warn("renameat: first argument not AT_FDCWD; unlikely to work"); 89710850SGiacomo.Gabrielli@arm.com 89810850SGiacomo.Gabrielli@arm.com std::string old_name; 89910850SGiacomo.Gabrielli@arm.com 90010850SGiacomo.Gabrielli@arm.com if (!tc->getMemProxy().tryReadString(old_name, 90110850SGiacomo.Gabrielli@arm.com process->getSyscallArg(tc, index))) 90210850SGiacomo.Gabrielli@arm.com return -EFAULT; 90310850SGiacomo.Gabrielli@arm.com 90410850SGiacomo.Gabrielli@arm.com int newdirfd = process->getSyscallArg(tc, index); 90510850SGiacomo.Gabrielli@arm.com if (newdirfd != OS::TGT_AT_FDCWD) 90610850SGiacomo.Gabrielli@arm.com warn("renameat: third argument not AT_FDCWD; unlikely to work"); 90710850SGiacomo.Gabrielli@arm.com 90810850SGiacomo.Gabrielli@arm.com std::string new_name; 90910850SGiacomo.Gabrielli@arm.com 91010850SGiacomo.Gabrielli@arm.com if (!tc->getMemProxy().tryReadString(new_name, 91110850SGiacomo.Gabrielli@arm.com process->getSyscallArg(tc, index))) 91210850SGiacomo.Gabrielli@arm.com return -EFAULT; 91310850SGiacomo.Gabrielli@arm.com 91410850SGiacomo.Gabrielli@arm.com // Adjust path for current working directory 91510850SGiacomo.Gabrielli@arm.com old_name = process->fullPath(old_name); 91610850SGiacomo.Gabrielli@arm.com new_name = process->fullPath(new_name); 91710850SGiacomo.Gabrielli@arm.com 91810850SGiacomo.Gabrielli@arm.com int result = rename(old_name.c_str(), new_name.c_str()); 91910850SGiacomo.Gabrielli@arm.com return (result == -1) ? -errno : result; 92010850SGiacomo.Gabrielli@arm.com} 92110850SGiacomo.Gabrielli@arm.com 9226640Svince@csl.cornell.edu/// Target sysinfo() handler. 9236640Svince@csl.cornell.edutemplate <class OS> 9246640Svince@csl.cornell.eduSyscallReturn 92511851Sbrandon.potter@amd.comsysinfoFunc(SyscallDesc *desc, int callnum, Process *process, 92611851Sbrandon.potter@amd.com ThreadContext *tc) 9276640Svince@csl.cornell.edu{ 9286640Svince@csl.cornell.edu 9296701Sgblack@eecs.umich.edu int index = 0; 9306701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::tgt_sysinfo> 93110793Sbrandon.potter@amd.com sysinfo(process->getSyscallArg(tc, index)); 9326640Svince@csl.cornell.edu 93311758Sbrandon.potter@amd.com sysinfo->uptime = seconds_since_epoch; 93411758Sbrandon.potter@amd.com sysinfo->totalram = process->system->memSize(); 93511758Sbrandon.potter@amd.com sysinfo->mem_unit = 1; 9366640Svince@csl.cornell.edu 9378706Sandreas.hansson@arm.com sysinfo.copyOut(tc->getMemProxy()); 9386640Svince@csl.cornell.edu 9396701Sgblack@eecs.umich.edu return 0; 9406640Svince@csl.cornell.edu} 941360SN/A 9421999SN/A/// Target chmod() handler. 9431999SN/Atemplate <class OS> 9441999SN/ASyscallReturn 94511851Sbrandon.potter@amd.comchmodFunc(SyscallDesc *desc, int callnum, Process *process, 9462680Sktlim@umich.edu ThreadContext *tc) 9471999SN/A{ 9481999SN/A std::string path; 9491999SN/A 9506701Sgblack@eecs.umich.edu int index = 0; 9518852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 9526701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 9531999SN/A return -EFAULT; 9546701Sgblack@eecs.umich.edu } 9551999SN/A 9566701Sgblack@eecs.umich.edu uint32_t mode = process->getSyscallArg(tc, index); 9571999SN/A mode_t hostMode = 0; 9581999SN/A 9591999SN/A // XXX translate mode flags via OS::something??? 9601999SN/A hostMode = mode; 9611999SN/A 9623669Sbinkertn@umich.edu // Adjust path for current working directory 9633669Sbinkertn@umich.edu path = process->fullPath(path); 9643669Sbinkertn@umich.edu 9651999SN/A // do the chmod 9661999SN/A int result = chmod(path.c_str(), hostMode); 9671999SN/A if (result < 0) 9682218SN/A return -errno; 9691999SN/A 9701999SN/A return 0; 9711999SN/A} 9721999SN/A 97313570Sbrandon.potter@amd.comtemplate <class OS> 97413570Sbrandon.potter@amd.comSyscallReturn 97513570Sbrandon.potter@amd.compollFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 97613570Sbrandon.potter@amd.com{ 97713570Sbrandon.potter@amd.com int index = 0; 97813570Sbrandon.potter@amd.com Addr fdsPtr = p->getSyscallArg(tc, index); 97913570Sbrandon.potter@amd.com int nfds = p->getSyscallArg(tc, index); 98013570Sbrandon.potter@amd.com int tmout = p->getSyscallArg(tc, index); 98113570Sbrandon.potter@amd.com 98213570Sbrandon.potter@amd.com BufferArg fdsBuf(fdsPtr, sizeof(struct pollfd) * nfds); 98313570Sbrandon.potter@amd.com fdsBuf.copyIn(tc->getMemProxy()); 98413570Sbrandon.potter@amd.com 98513570Sbrandon.potter@amd.com /** 98613570Sbrandon.potter@amd.com * Record the target file descriptors in a local variable. We need to 98713570Sbrandon.potter@amd.com * replace them with host file descriptors but we need a temporary copy 98813570Sbrandon.potter@amd.com * for later. Afterwards, replace each target file descriptor in the 98913570Sbrandon.potter@amd.com * poll_fd array with its host_fd. 99013570Sbrandon.potter@amd.com */ 99113570Sbrandon.potter@amd.com int temp_tgt_fds[nfds]; 99213570Sbrandon.potter@amd.com for (index = 0; index < nfds; index++) { 99313570Sbrandon.potter@amd.com temp_tgt_fds[index] = ((struct pollfd *)fdsBuf.bufferPtr())[index].fd; 99413570Sbrandon.potter@amd.com auto tgt_fd = temp_tgt_fds[index]; 99513570Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 99613570Sbrandon.potter@amd.com if (!hbfdp) 99713570Sbrandon.potter@amd.com return -EBADF; 99813570Sbrandon.potter@amd.com auto host_fd = hbfdp->getSimFD(); 99913570Sbrandon.potter@amd.com ((struct pollfd *)fdsBuf.bufferPtr())[index].fd = host_fd; 100013570Sbrandon.potter@amd.com } 100113570Sbrandon.potter@amd.com 100213570Sbrandon.potter@amd.com /** 100313570Sbrandon.potter@amd.com * We cannot allow an infinite poll to occur or it will inevitably cause 100413570Sbrandon.potter@amd.com * a deadlock in the gem5 simulator with clone. We must pass in tmout with 100513570Sbrandon.potter@amd.com * a non-negative value, however it also makes no sense to poll on the 100613570Sbrandon.potter@amd.com * underlying host for any other time than tmout a zero timeout. 100713570Sbrandon.potter@amd.com */ 100813570Sbrandon.potter@amd.com int status; 100913570Sbrandon.potter@amd.com if (tmout < 0) { 101013570Sbrandon.potter@amd.com status = poll((struct pollfd *)fdsBuf.bufferPtr(), nfds, 0); 101113570Sbrandon.potter@amd.com if (status == 0) { 101213570Sbrandon.potter@amd.com /** 101313570Sbrandon.potter@amd.com * If blocking indefinitely, check the signal list to see if a 101413570Sbrandon.potter@amd.com * signal would break the poll out of the retry cycle and try 101513570Sbrandon.potter@amd.com * to return the signal interrupt instead. 101613570Sbrandon.potter@amd.com */ 101713570Sbrandon.potter@amd.com System *sysh = tc->getSystemPtr(); 101813570Sbrandon.potter@amd.com std::list<BasicSignal>::iterator it; 101913570Sbrandon.potter@amd.com for (it=sysh->signalList.begin(); it!=sysh->signalList.end(); it++) 102013570Sbrandon.potter@amd.com if (it->receiver == p) 102113570Sbrandon.potter@amd.com return -EINTR; 102213570Sbrandon.potter@amd.com return SyscallReturn::retry(); 102313570Sbrandon.potter@amd.com } 102413570Sbrandon.potter@amd.com } else 102513570Sbrandon.potter@amd.com status = poll((struct pollfd *)fdsBuf.bufferPtr(), nfds, 0); 102613570Sbrandon.potter@amd.com 102713570Sbrandon.potter@amd.com if (status == -1) 102813570Sbrandon.potter@amd.com return -errno; 102913570Sbrandon.potter@amd.com 103013570Sbrandon.potter@amd.com /** 103113570Sbrandon.potter@amd.com * Replace each host_fd in the returned poll_fd array with its original 103213570Sbrandon.potter@amd.com * target file descriptor. 103313570Sbrandon.potter@amd.com */ 103413570Sbrandon.potter@amd.com for (index = 0; index < nfds; index++) { 103513570Sbrandon.potter@amd.com auto tgt_fd = temp_tgt_fds[index]; 103613570Sbrandon.potter@amd.com ((struct pollfd *)fdsBuf.bufferPtr())[index].fd = tgt_fd; 103713570Sbrandon.potter@amd.com } 103813570Sbrandon.potter@amd.com 103913570Sbrandon.potter@amd.com /** 104013570Sbrandon.potter@amd.com * Copy out the pollfd struct because the host may have updated fields 104113570Sbrandon.potter@amd.com * in the structure. 104213570Sbrandon.potter@amd.com */ 104313570Sbrandon.potter@amd.com fdsBuf.copyOut(tc->getMemProxy()); 104413570Sbrandon.potter@amd.com 104513570Sbrandon.potter@amd.com return status; 104613570Sbrandon.potter@amd.com} 10471999SN/A 10481999SN/A/// Target fchmod() handler. 10491999SN/Atemplate <class OS> 10501999SN/ASyscallReturn 105111856Sbrandon.potter@amd.comfchmodFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 10521999SN/A{ 10536701Sgblack@eecs.umich.edu int index = 0; 105411856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 105511856Sbrandon.potter@amd.com uint32_t mode = p->getSyscallArg(tc, index); 105610931Sbrandon.potter@amd.com 105711856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 105811856Sbrandon.potter@amd.com if (!ffdp) 10591999SN/A return -EBADF; 106011856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 10611999SN/A 106211856Sbrandon.potter@amd.com mode_t hostMode = mode; 10631999SN/A 106411856Sbrandon.potter@amd.com int result = fchmod(sim_fd, hostMode); 10651999SN/A 106611856Sbrandon.potter@amd.com return (result < 0) ? -errno : 0; 10671999SN/A} 10681999SN/A 10695877Shsul@eecs.umich.edu/// Target mremap() handler. 10705877Shsul@eecs.umich.edutemplate <class OS> 10715877Shsul@eecs.umich.eduSyscallReturn 107211851Sbrandon.potter@amd.commremapFunc(SyscallDesc *desc, int callnum, Process *process, ThreadContext *tc) 10735877Shsul@eecs.umich.edu{ 10746701Sgblack@eecs.umich.edu int index = 0; 10756701Sgblack@eecs.umich.edu Addr start = process->getSyscallArg(tc, index); 10766701Sgblack@eecs.umich.edu uint64_t old_length = process->getSyscallArg(tc, index); 10776701Sgblack@eecs.umich.edu uint64_t new_length = process->getSyscallArg(tc, index); 10786701Sgblack@eecs.umich.edu uint64_t flags = process->getSyscallArg(tc, index); 107910027SChris.Adeniyi-Jones@arm.com uint64_t provided_address = 0; 108010027SChris.Adeniyi-Jones@arm.com bool use_provided_address = flags & OS::TGT_MREMAP_FIXED; 108110027SChris.Adeniyi-Jones@arm.com 108210027SChris.Adeniyi-Jones@arm.com if (use_provided_address) 108310027SChris.Adeniyi-Jones@arm.com provided_address = process->getSyscallArg(tc, index); 10845877Shsul@eecs.umich.edu 108510318Sandreas.hansson@arm.com if ((start % TheISA::PageBytes != 0) || 108610318Sandreas.hansson@arm.com (provided_address % TheISA::PageBytes != 0)) { 10875877Shsul@eecs.umich.edu warn("mremap failing: arguments not page aligned"); 10885877Shsul@eecs.umich.edu return -EINVAL; 10895877Shsul@eecs.umich.edu } 10905877Shsul@eecs.umich.edu 109110486Stjablin@gmail.com new_length = roundUp(new_length, TheISA::PageBytes); 109210486Stjablin@gmail.com 10935877Shsul@eecs.umich.edu if (new_length > old_length) { 109411905SBrandon.Potter@amd.com std::shared_ptr<MemState> mem_state = process->memState; 109511905SBrandon.Potter@amd.com Addr mmap_end = mem_state->getMmapEnd(); 109611905SBrandon.Potter@amd.com 109711905SBrandon.Potter@amd.com if ((start + old_length) == mmap_end && 109810027SChris.Adeniyi-Jones@arm.com (!use_provided_address || provided_address == start)) { 109912206Srico.amslinger@informatik.uni-augsburg.de // This case cannot occur when growing downward, as 110012206Srico.amslinger@informatik.uni-augsburg.de // start is greater than or equal to mmap_end. 11015877Shsul@eecs.umich.edu uint64_t diff = new_length - old_length; 110211905SBrandon.Potter@amd.com process->allocateMem(mmap_end, diff); 110311905SBrandon.Potter@amd.com mem_state->setMmapEnd(mmap_end + diff); 11045877Shsul@eecs.umich.edu return start; 11055877Shsul@eecs.umich.edu } else { 110610027SChris.Adeniyi-Jones@arm.com if (!use_provided_address && !(flags & OS::TGT_MREMAP_MAYMOVE)) { 11075877Shsul@eecs.umich.edu warn("can't remap here and MREMAP_MAYMOVE flag not set\n"); 11085877Shsul@eecs.umich.edu return -ENOMEM; 11095877Shsul@eecs.umich.edu } else { 111012206Srico.amslinger@informatik.uni-augsburg.de uint64_t new_start = provided_address; 111112206Srico.amslinger@informatik.uni-augsburg.de if (!use_provided_address) { 111212206Srico.amslinger@informatik.uni-augsburg.de new_start = process->mmapGrowsDown() ? 111312206Srico.amslinger@informatik.uni-augsburg.de mmap_end - new_length : mmap_end; 111412206Srico.amslinger@informatik.uni-augsburg.de mmap_end = process->mmapGrowsDown() ? 111512206Srico.amslinger@informatik.uni-augsburg.de new_start : mmap_end + new_length; 111612206Srico.amslinger@informatik.uni-augsburg.de mem_state->setMmapEnd(mmap_end); 111712206Srico.amslinger@informatik.uni-augsburg.de } 111812206Srico.amslinger@informatik.uni-augsburg.de 111910027SChris.Adeniyi-Jones@arm.com process->pTable->remap(start, old_length, new_start); 112010027SChris.Adeniyi-Jones@arm.com warn("mremapping to new vaddr %08p-%08p, adding %d\n", 112110027SChris.Adeniyi-Jones@arm.com new_start, new_start + new_length, 112210027SChris.Adeniyi-Jones@arm.com new_length - old_length); 11235877Shsul@eecs.umich.edu // add on the remaining unallocated pages 112410027SChris.Adeniyi-Jones@arm.com process->allocateMem(new_start + old_length, 112510027SChris.Adeniyi-Jones@arm.com new_length - old_length, 112610027SChris.Adeniyi-Jones@arm.com use_provided_address /* clobber */); 112710027SChris.Adeniyi-Jones@arm.com if (use_provided_address && 112812206Srico.amslinger@informatik.uni-augsburg.de ((new_start + new_length > mem_state->getMmapEnd() && 112912206Srico.amslinger@informatik.uni-augsburg.de !process->mmapGrowsDown()) || 113012206Srico.amslinger@informatik.uni-augsburg.de (new_start < mem_state->getMmapEnd() && 113112206Srico.amslinger@informatik.uni-augsburg.de process->mmapGrowsDown()))) { 113210027SChris.Adeniyi-Jones@arm.com // something fishy going on here, at least notify the user 113310027SChris.Adeniyi-Jones@arm.com // @todo: increase mmap_end? 113410027SChris.Adeniyi-Jones@arm.com warn("mmap region limit exceeded with MREMAP_FIXED\n"); 113510027SChris.Adeniyi-Jones@arm.com } 113610027SChris.Adeniyi-Jones@arm.com warn("returning %08p as start\n", new_start); 113710027SChris.Adeniyi-Jones@arm.com return new_start; 11385877Shsul@eecs.umich.edu } 11395877Shsul@eecs.umich.edu } 11405877Shsul@eecs.umich.edu } else { 114110027SChris.Adeniyi-Jones@arm.com if (use_provided_address && provided_address != start) 114210027SChris.Adeniyi-Jones@arm.com process->pTable->remap(start, new_length, provided_address); 11438601Ssteve.reinhardt@amd.com process->pTable->unmap(start + new_length, old_length - new_length); 114410027SChris.Adeniyi-Jones@arm.com return use_provided_address ? provided_address : start; 11455877Shsul@eecs.umich.edu } 11465877Shsul@eecs.umich.edu} 11471999SN/A 1148378SN/A/// Target stat() handler. 1149360SN/Atemplate <class OS> 11501450SN/ASyscallReturn 115111851Sbrandon.potter@amd.comstatFunc(SyscallDesc *desc, int callnum, Process *process, 11522680Sktlim@umich.edu ThreadContext *tc) 1153360SN/A{ 1154360SN/A std::string path; 1155360SN/A 11566701Sgblack@eecs.umich.edu int index = 0; 11578852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 11586701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 11596701Sgblack@eecs.umich.edu return -EFAULT; 11606701Sgblack@eecs.umich.edu } 11616701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 1162360SN/A 11633669Sbinkertn@umich.edu // Adjust path for current working directory 11643669Sbinkertn@umich.edu path = process->fullPath(path); 11653669Sbinkertn@umich.edu 1166360SN/A struct stat hostBuf; 1167360SN/A int result = stat(path.c_str(), &hostBuf); 1168360SN/A 1169360SN/A if (result < 0) 11702218SN/A return -errno; 1171360SN/A 11728706Sandreas.hansson@arm.com copyOutStatBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 1173360SN/A 11741458SN/A return 0; 1175360SN/A} 1176360SN/A 1177360SN/A 11785074Ssaidi@eecs.umich.edu/// Target stat64() handler. 11795074Ssaidi@eecs.umich.edutemplate <class OS> 11805074Ssaidi@eecs.umich.eduSyscallReturn 118111851Sbrandon.potter@amd.comstat64Func(SyscallDesc *desc, int callnum, Process *process, 11825074Ssaidi@eecs.umich.edu ThreadContext *tc) 11835074Ssaidi@eecs.umich.edu{ 11845074Ssaidi@eecs.umich.edu std::string path; 11855074Ssaidi@eecs.umich.edu 11866701Sgblack@eecs.umich.edu int index = 0; 11878852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 11886701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) 11895074Ssaidi@eecs.umich.edu return -EFAULT; 11906701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 11915074Ssaidi@eecs.umich.edu 11925074Ssaidi@eecs.umich.edu // Adjust path for current working directory 11935074Ssaidi@eecs.umich.edu path = process->fullPath(path); 11945074Ssaidi@eecs.umich.edu 11955208Ssaidi@eecs.umich.edu#if NO_STAT64 11965208Ssaidi@eecs.umich.edu struct stat hostBuf; 11975208Ssaidi@eecs.umich.edu int result = stat(path.c_str(), &hostBuf); 11985208Ssaidi@eecs.umich.edu#else 11995074Ssaidi@eecs.umich.edu struct stat64 hostBuf; 12005074Ssaidi@eecs.umich.edu int result = stat64(path.c_str(), &hostBuf); 12015208Ssaidi@eecs.umich.edu#endif 12025074Ssaidi@eecs.umich.edu 12035074Ssaidi@eecs.umich.edu if (result < 0) 12045074Ssaidi@eecs.umich.edu return -errno; 12055074Ssaidi@eecs.umich.edu 12068706Sandreas.hansson@arm.com copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 12075074Ssaidi@eecs.umich.edu 12085074Ssaidi@eecs.umich.edu return 0; 12095074Ssaidi@eecs.umich.edu} 12105074Ssaidi@eecs.umich.edu 12115074Ssaidi@eecs.umich.edu 121210027SChris.Adeniyi-Jones@arm.com/// Target fstatat64() handler. 121310027SChris.Adeniyi-Jones@arm.comtemplate <class OS> 121410027SChris.Adeniyi-Jones@arm.comSyscallReturn 121511851Sbrandon.potter@amd.comfstatat64Func(SyscallDesc *desc, int callnum, Process *process, 121610027SChris.Adeniyi-Jones@arm.com ThreadContext *tc) 121710027SChris.Adeniyi-Jones@arm.com{ 121810027SChris.Adeniyi-Jones@arm.com int index = 0; 121910027SChris.Adeniyi-Jones@arm.com int dirfd = process->getSyscallArg(tc, index); 122010027SChris.Adeniyi-Jones@arm.com if (dirfd != OS::TGT_AT_FDCWD) 122110793Sbrandon.potter@amd.com warn("fstatat64: first argument not AT_FDCWD; unlikely to work"); 122210027SChris.Adeniyi-Jones@arm.com 122310027SChris.Adeniyi-Jones@arm.com std::string path; 122410027SChris.Adeniyi-Jones@arm.com if (!tc->getMemProxy().tryReadString(path, 122510027SChris.Adeniyi-Jones@arm.com process->getSyscallArg(tc, index))) 122610027SChris.Adeniyi-Jones@arm.com return -EFAULT; 122710027SChris.Adeniyi-Jones@arm.com Addr bufPtr = process->getSyscallArg(tc, index); 122810027SChris.Adeniyi-Jones@arm.com 122910027SChris.Adeniyi-Jones@arm.com // Adjust path for current working directory 123010027SChris.Adeniyi-Jones@arm.com path = process->fullPath(path); 123110027SChris.Adeniyi-Jones@arm.com 123210027SChris.Adeniyi-Jones@arm.com#if NO_STAT64 123310027SChris.Adeniyi-Jones@arm.com struct stat hostBuf; 123410027SChris.Adeniyi-Jones@arm.com int result = stat(path.c_str(), &hostBuf); 123510027SChris.Adeniyi-Jones@arm.com#else 123610027SChris.Adeniyi-Jones@arm.com struct stat64 hostBuf; 123710027SChris.Adeniyi-Jones@arm.com int result = stat64(path.c_str(), &hostBuf); 123810027SChris.Adeniyi-Jones@arm.com#endif 123910027SChris.Adeniyi-Jones@arm.com 124010027SChris.Adeniyi-Jones@arm.com if (result < 0) 124110027SChris.Adeniyi-Jones@arm.com return -errno; 124210027SChris.Adeniyi-Jones@arm.com 124310027SChris.Adeniyi-Jones@arm.com copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 124410027SChris.Adeniyi-Jones@arm.com 124510027SChris.Adeniyi-Jones@arm.com return 0; 124610027SChris.Adeniyi-Jones@arm.com} 124710027SChris.Adeniyi-Jones@arm.com 124810027SChris.Adeniyi-Jones@arm.com 12491999SN/A/// Target fstat64() handler. 12501999SN/Atemplate <class OS> 12511999SN/ASyscallReturn 125211856Sbrandon.potter@amd.comfstat64Func(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 12531999SN/A{ 12546701Sgblack@eecs.umich.edu int index = 0; 125511856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 125611856Sbrandon.potter@amd.com Addr bufPtr = p->getSyscallArg(tc, index); 125710931Sbrandon.potter@amd.com 125811856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 125911856Sbrandon.potter@amd.com if (!ffdp) 12601999SN/A return -EBADF; 126111856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 12621999SN/A 12632764Sstever@eecs.umich.edu#if NO_STAT64 12642064SN/A struct stat hostBuf; 126510931Sbrandon.potter@amd.com int result = fstat(sim_fd, &hostBuf); 12662064SN/A#else 12672064SN/A struct stat64 hostBuf; 126810931Sbrandon.potter@amd.com int result = fstat64(sim_fd, &hostBuf); 12692064SN/A#endif 12701999SN/A 12711999SN/A if (result < 0) 12722218SN/A return -errno; 12731999SN/A 127410931Sbrandon.potter@amd.com copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf, (sim_fd == 1)); 12751999SN/A 12761999SN/A return 0; 12771999SN/A} 12781999SN/A 12791999SN/A 1280378SN/A/// Target lstat() handler. 1281360SN/Atemplate <class OS> 12821450SN/ASyscallReturn 128311851Sbrandon.potter@amd.comlstatFunc(SyscallDesc *desc, int callnum, Process *process, 12842680Sktlim@umich.edu ThreadContext *tc) 1285360SN/A{ 1286360SN/A std::string path; 1287360SN/A 12886701Sgblack@eecs.umich.edu int index = 0; 12898852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 12906701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 12916701Sgblack@eecs.umich.edu return -EFAULT; 12926701Sgblack@eecs.umich.edu } 12936701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 1294360SN/A 12953669Sbinkertn@umich.edu // Adjust path for current working directory 12963669Sbinkertn@umich.edu path = process->fullPath(path); 12973669Sbinkertn@umich.edu 1298360SN/A struct stat hostBuf; 1299360SN/A int result = lstat(path.c_str(), &hostBuf); 1300360SN/A 1301360SN/A if (result < 0) 13021458SN/A return -errno; 1303360SN/A 13048706Sandreas.hansson@arm.com copyOutStatBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 1305360SN/A 13061458SN/A return 0; 1307360SN/A} 1308360SN/A 13091999SN/A/// Target lstat64() handler. 13101999SN/Atemplate <class OS> 13111999SN/ASyscallReturn 131211851Sbrandon.potter@amd.comlstat64Func(SyscallDesc *desc, int callnum, Process *process, 13132680Sktlim@umich.edu ThreadContext *tc) 13141999SN/A{ 13151999SN/A std::string path; 13161999SN/A 13176701Sgblack@eecs.umich.edu int index = 0; 13188852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 13196701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 13206701Sgblack@eecs.umich.edu return -EFAULT; 13216701Sgblack@eecs.umich.edu } 13226701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 13231999SN/A 13243669Sbinkertn@umich.edu // Adjust path for current working directory 13253669Sbinkertn@umich.edu path = process->fullPath(path); 13263669Sbinkertn@umich.edu 13272764Sstever@eecs.umich.edu#if NO_STAT64 13282064SN/A struct stat hostBuf; 13292064SN/A int result = lstat(path.c_str(), &hostBuf); 13302064SN/A#else 13311999SN/A struct stat64 hostBuf; 13321999SN/A int result = lstat64(path.c_str(), &hostBuf); 13332064SN/A#endif 13341999SN/A 13351999SN/A if (result < 0) 13361999SN/A return -errno; 13371999SN/A 13388706Sandreas.hansson@arm.com copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 13391999SN/A 13401999SN/A return 0; 13411999SN/A} 13421999SN/A 1343378SN/A/// Target fstat() handler. 1344360SN/Atemplate <class OS> 13451450SN/ASyscallReturn 134611856Sbrandon.potter@amd.comfstatFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 1347360SN/A{ 13486701Sgblack@eecs.umich.edu int index = 0; 134911856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 135011856Sbrandon.potter@amd.com Addr bufPtr = p->getSyscallArg(tc, index); 1351360SN/A 135211380Salexandru.dutu@amd.com DPRINTF_SYSCALL(Verbose, "fstat(%d, ...)\n", tgt_fd); 1353360SN/A 135411856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 135511856Sbrandon.potter@amd.com if (!ffdp) 13561458SN/A return -EBADF; 135711856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 1358360SN/A 1359360SN/A struct stat hostBuf; 136010931Sbrandon.potter@amd.com int result = fstat(sim_fd, &hostBuf); 1361360SN/A 1362360SN/A if (result < 0) 13631458SN/A return -errno; 1364360SN/A 136510931Sbrandon.potter@amd.com copyOutStatBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf, (sim_fd == 1)); 13662021SN/A 13671458SN/A return 0; 1368360SN/A} 1369360SN/A 13701706SN/A/// Target statfs() handler. 13711706SN/Atemplate <class OS> 13721706SN/ASyscallReturn 137311851Sbrandon.potter@amd.comstatfsFunc(SyscallDesc *desc, int callnum, Process *process, 13742680Sktlim@umich.edu ThreadContext *tc) 13751706SN/A{ 137611799Sbrandon.potter@amd.com#if NO_STATFS 137711799Sbrandon.potter@amd.com warn("Host OS cannot support calls to statfs. Ignoring syscall"); 137811799Sbrandon.potter@amd.com#else 13791706SN/A std::string path; 13801706SN/A 13816701Sgblack@eecs.umich.edu int index = 0; 13828852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 13836701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 13846701Sgblack@eecs.umich.edu return -EFAULT; 13856701Sgblack@eecs.umich.edu } 13866701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 13871706SN/A 13883669Sbinkertn@umich.edu // Adjust path for current working directory 13893669Sbinkertn@umich.edu path = process->fullPath(path); 13903669Sbinkertn@umich.edu 13911706SN/A struct statfs hostBuf; 13921706SN/A int result = statfs(path.c_str(), &hostBuf); 13931706SN/A 13941706SN/A if (result < 0) 13952218SN/A return -errno; 13961706SN/A 139711759Sbrandon.potter@amd.com copyOutStatfsBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 139811799Sbrandon.potter@amd.com#endif 13991706SN/A return 0; 14001706SN/A} 14011706SN/A 140211886Sbrandon.potter@amd.comtemplate <class OS> 140311886Sbrandon.potter@amd.comSyscallReturn 140411886Sbrandon.potter@amd.comcloneFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 140511886Sbrandon.potter@amd.com{ 140611886Sbrandon.potter@amd.com int index = 0; 140712426Sqtt2@cornell.edu 140813557Sgabeblack@google.com RegVal flags = p->getSyscallArg(tc, index); 140913557Sgabeblack@google.com RegVal newStack = p->getSyscallArg(tc, index); 141011886Sbrandon.potter@amd.com Addr ptidPtr = p->getSyscallArg(tc, index); 141112426Sqtt2@cornell.edu 141213534Sandreas.sandberg@arm.com#if THE_ISA == RISCV_ISA or THE_ISA == ARM_ISA 141312426Sqtt2@cornell.edu /** 141413534Sandreas.sandberg@arm.com * Linux sets CLONE_BACKWARDS flag for RISC-V and Arm. 141512426Sqtt2@cornell.edu * The flag defines the list of clone() arguments in the following 141612426Sqtt2@cornell.edu * order: flags -> newStack -> ptidPtr -> tlsPtr -> ctidPtr 141712426Sqtt2@cornell.edu */ 141813536Sandreas.sandberg@arm.com Addr tlsPtr = p->getSyscallArg(tc, index); 141912426Sqtt2@cornell.edu Addr ctidPtr = p->getSyscallArg(tc, index); 142012426Sqtt2@cornell.edu#else 142111886Sbrandon.potter@amd.com Addr ctidPtr = p->getSyscallArg(tc, index); 142213536Sandreas.sandberg@arm.com Addr tlsPtr = p->getSyscallArg(tc, index); 142312426Sqtt2@cornell.edu#endif 142411886Sbrandon.potter@amd.com 142511886Sbrandon.potter@amd.com if (((flags & OS::TGT_CLONE_SIGHAND)&& !(flags & OS::TGT_CLONE_VM)) || 142611886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_THREAD) && !(flags & OS::TGT_CLONE_SIGHAND)) || 142711886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_FS) && (flags & OS::TGT_CLONE_NEWNS)) || 142811886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_NEWIPC) && (flags & OS::TGT_CLONE_SYSVSEM)) || 142911886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_NEWPID) && (flags & OS::TGT_CLONE_THREAD)) || 143011886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_VM) && !(newStack))) 143111886Sbrandon.potter@amd.com return -EINVAL; 143211886Sbrandon.potter@amd.com 143311886Sbrandon.potter@amd.com ThreadContext *ctc; 143413649Sqtt2@cornell.edu if (!(ctc = p->findFreeContext())) { 143513649Sqtt2@cornell.edu DPRINTF_SYSCALL(Verbose, "clone: no spare thread context in system" 143613649Sqtt2@cornell.edu "[cpu %d, thread %d]", tc->cpuId(), tc->threadId()); 143713649Sqtt2@cornell.edu return -EAGAIN; 143813649Sqtt2@cornell.edu } 143911886Sbrandon.potter@amd.com 144011886Sbrandon.potter@amd.com /** 144111886Sbrandon.potter@amd.com * Note that ProcessParams is generated by swig and there are no other 144211886Sbrandon.potter@amd.com * examples of how to create anything but this default constructor. The 144311886Sbrandon.potter@amd.com * fields are manually initialized instead of passing parameters to the 144411886Sbrandon.potter@amd.com * constructor. 144511886Sbrandon.potter@amd.com */ 144611886Sbrandon.potter@amd.com ProcessParams *pp = new ProcessParams(); 144711886Sbrandon.potter@amd.com pp->executable.assign(*(new std::string(p->progName()))); 144811886Sbrandon.potter@amd.com pp->cmd.push_back(*(new std::string(p->progName()))); 144911886Sbrandon.potter@amd.com pp->system = p->system; 145011886Sbrandon.potter@amd.com pp->cwd.assign(p->getcwd()); 145111886Sbrandon.potter@amd.com pp->input.assign("stdin"); 145211886Sbrandon.potter@amd.com pp->output.assign("stdout"); 145311886Sbrandon.potter@amd.com pp->errout.assign("stderr"); 145411886Sbrandon.potter@amd.com pp->uid = p->uid(); 145511886Sbrandon.potter@amd.com pp->euid = p->euid(); 145611886Sbrandon.potter@amd.com pp->gid = p->gid(); 145711886Sbrandon.potter@amd.com pp->egid = p->egid(); 145811886Sbrandon.potter@amd.com 145911886Sbrandon.potter@amd.com /* Find the first free PID that's less than the maximum */ 146011886Sbrandon.potter@amd.com std::set<int> const& pids = p->system->PIDs; 146111886Sbrandon.potter@amd.com int temp_pid = *pids.begin(); 146211886Sbrandon.potter@amd.com do { 146311886Sbrandon.potter@amd.com temp_pid++; 146411886Sbrandon.potter@amd.com } while (pids.find(temp_pid) != pids.end()); 146511886Sbrandon.potter@amd.com if (temp_pid >= System::maxPID) 146611886Sbrandon.potter@amd.com fatal("temp_pid is too large: %d", temp_pid); 146711886Sbrandon.potter@amd.com 146811886Sbrandon.potter@amd.com pp->pid = temp_pid; 146911886Sbrandon.potter@amd.com pp->ppid = (flags & OS::TGT_CLONE_THREAD) ? p->ppid() : p->pid(); 147011886Sbrandon.potter@amd.com Process *cp = pp->create(); 147111886Sbrandon.potter@amd.com delete pp; 147211886Sbrandon.potter@amd.com 147311886Sbrandon.potter@amd.com Process *owner = ctc->getProcessPtr(); 147411886Sbrandon.potter@amd.com ctc->setProcessPtr(cp); 147511886Sbrandon.potter@amd.com cp->assignThreadContext(ctc->contextId()); 147611886Sbrandon.potter@amd.com owner->revokeThreadContext(ctc->contextId()); 147711886Sbrandon.potter@amd.com 147811886Sbrandon.potter@amd.com if (flags & OS::TGT_CLONE_PARENT_SETTID) { 147911886Sbrandon.potter@amd.com BufferArg ptidBuf(ptidPtr, sizeof(long)); 148011886Sbrandon.potter@amd.com long *ptid = (long *)ptidBuf.bufferPtr(); 148111886Sbrandon.potter@amd.com *ptid = cp->pid(); 148211886Sbrandon.potter@amd.com ptidBuf.copyOut(tc->getMemProxy()); 148311886Sbrandon.potter@amd.com } 148411886Sbrandon.potter@amd.com 148511886Sbrandon.potter@amd.com cp->initState(); 148611886Sbrandon.potter@amd.com p->clone(tc, ctc, cp, flags); 148711886Sbrandon.potter@amd.com 148811911SBrandon.Potter@amd.com if (flags & OS::TGT_CLONE_THREAD) { 148911911SBrandon.Potter@amd.com delete cp->sigchld; 149011911SBrandon.Potter@amd.com cp->sigchld = p->sigchld; 149111911SBrandon.Potter@amd.com } else if (flags & OS::TGT_SIGCHLD) { 149211911SBrandon.Potter@amd.com *cp->sigchld = true; 149311911SBrandon.Potter@amd.com } 149411911SBrandon.Potter@amd.com 149511886Sbrandon.potter@amd.com if (flags & OS::TGT_CLONE_CHILD_SETTID) { 149611886Sbrandon.potter@amd.com BufferArg ctidBuf(ctidPtr, sizeof(long)); 149711886Sbrandon.potter@amd.com long *ctid = (long *)ctidBuf.bufferPtr(); 149811886Sbrandon.potter@amd.com *ctid = cp->pid(); 149911886Sbrandon.potter@amd.com ctidBuf.copyOut(ctc->getMemProxy()); 150011886Sbrandon.potter@amd.com } 150111886Sbrandon.potter@amd.com 150211886Sbrandon.potter@amd.com if (flags & OS::TGT_CLONE_CHILD_CLEARTID) 150311886Sbrandon.potter@amd.com cp->childClearTID = (uint64_t)ctidPtr; 150411886Sbrandon.potter@amd.com 150511886Sbrandon.potter@amd.com ctc->clearArchRegs(); 150611886Sbrandon.potter@amd.com 150713536Sandreas.sandberg@arm.com OS::archClone(flags, p, cp, tc, ctc, newStack, tlsPtr); 150811886Sbrandon.potter@amd.com 150911886Sbrandon.potter@amd.com cp->setSyscallReturn(ctc, 0); 151011886Sbrandon.potter@amd.com 151111886Sbrandon.potter@amd.com#if THE_ISA == ALPHA_ISA 151211886Sbrandon.potter@amd.com ctc->setIntReg(TheISA::SyscallSuccessReg, 0); 151311886Sbrandon.potter@amd.com#elif THE_ISA == SPARC_ISA 151411886Sbrandon.potter@amd.com tc->setIntReg(TheISA::SyscallPseudoReturnReg, 0); 151511886Sbrandon.potter@amd.com ctc->setIntReg(TheISA::SyscallPseudoReturnReg, 1); 151611886Sbrandon.potter@amd.com#endif 151711886Sbrandon.potter@amd.com 151813535Sandreas.sandberg@arm.com TheISA::PCState cpc = tc->pcState(); 151913535Sandreas.sandberg@arm.com cpc.advance(); 152013535Sandreas.sandberg@arm.com ctc->pcState(cpc); 152111886Sbrandon.potter@amd.com ctc->activate(); 152211886Sbrandon.potter@amd.com 152311886Sbrandon.potter@amd.com return cp->pid(); 152411886Sbrandon.potter@amd.com} 15251706SN/A 15261706SN/A/// Target fstatfs() handler. 15271706SN/Atemplate <class OS> 15281706SN/ASyscallReturn 152911856Sbrandon.potter@amd.comfstatfsFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 15301706SN/A{ 15316701Sgblack@eecs.umich.edu int index = 0; 153211856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 153311856Sbrandon.potter@amd.com Addr bufPtr = p->getSyscallArg(tc, index); 15341706SN/A 153511856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 153611856Sbrandon.potter@amd.com if (!ffdp) 15371706SN/A return -EBADF; 153811856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 15391706SN/A 15401706SN/A struct statfs hostBuf; 154110931Sbrandon.potter@amd.com int result = fstatfs(sim_fd, &hostBuf); 15421706SN/A 15431706SN/A if (result < 0) 15442218SN/A return -errno; 15451706SN/A 154611759Sbrandon.potter@amd.com copyOutStatfsBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 15471706SN/A 15481706SN/A return 0; 15491706SN/A} 15501706SN/A 155113572Sbrandon.potter@amd.com/// Target readv() handler. 155213572Sbrandon.potter@amd.comtemplate <class OS> 155313572Sbrandon.potter@amd.comSyscallReturn 155413572Sbrandon.potter@amd.comreadvFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 155513572Sbrandon.potter@amd.com{ 155613572Sbrandon.potter@amd.com int index = 0; 155713572Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 155813572Sbrandon.potter@amd.com 155913572Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 156013572Sbrandon.potter@amd.com if (!ffdp) 156113572Sbrandon.potter@amd.com return -EBADF; 156213572Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 156313572Sbrandon.potter@amd.com 156413572Sbrandon.potter@amd.com SETranslatingPortProxy &prox = tc->getMemProxy(); 156513572Sbrandon.potter@amd.com uint64_t tiov_base = p->getSyscallArg(tc, index); 156613572Sbrandon.potter@amd.com size_t count = p->getSyscallArg(tc, index); 156713572Sbrandon.potter@amd.com typename OS::tgt_iovec tiov[count]; 156813572Sbrandon.potter@amd.com struct iovec hiov[count]; 156913572Sbrandon.potter@amd.com for (size_t i = 0; i < count; ++i) { 157013572Sbrandon.potter@amd.com prox.readBlob(tiov_base + (i * sizeof(typename OS::tgt_iovec)), 157113572Sbrandon.potter@amd.com (uint8_t*)&tiov[i], sizeof(typename OS::tgt_iovec)); 157213572Sbrandon.potter@amd.com hiov[i].iov_len = TheISA::gtoh(tiov[i].iov_len); 157313572Sbrandon.potter@amd.com hiov[i].iov_base = new char [hiov[i].iov_len]; 157413572Sbrandon.potter@amd.com } 157513572Sbrandon.potter@amd.com 157613572Sbrandon.potter@amd.com int result = readv(sim_fd, hiov, count); 157713572Sbrandon.potter@amd.com int local_errno = errno; 157813572Sbrandon.potter@amd.com 157913572Sbrandon.potter@amd.com for (size_t i = 0; i < count; ++i) { 158013572Sbrandon.potter@amd.com if (result != -1) { 158113572Sbrandon.potter@amd.com prox.writeBlob(TheISA::htog(tiov[i].iov_base), 158213572Sbrandon.potter@amd.com (uint8_t*)hiov[i].iov_base, hiov[i].iov_len); 158313572Sbrandon.potter@amd.com } 158413572Sbrandon.potter@amd.com delete [] (char *)hiov[i].iov_base; 158513572Sbrandon.potter@amd.com } 158613572Sbrandon.potter@amd.com 158713572Sbrandon.potter@amd.com return (result == -1) ? -local_errno : result; 158813572Sbrandon.potter@amd.com} 15891706SN/A 15901999SN/A/// Target writev() handler. 15911999SN/Atemplate <class OS> 15921999SN/ASyscallReturn 159311856Sbrandon.potter@amd.comwritevFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 15941999SN/A{ 15956701Sgblack@eecs.umich.edu int index = 0; 159611856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 159710931Sbrandon.potter@amd.com 159811856Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 159911856Sbrandon.potter@amd.com if (!hbfdp) 16001999SN/A return -EBADF; 160111856Sbrandon.potter@amd.com int sim_fd = hbfdp->getSimFD(); 16021999SN/A 160311856Sbrandon.potter@amd.com SETranslatingPortProxy &prox = tc->getMemProxy(); 160411856Sbrandon.potter@amd.com uint64_t tiov_base = p->getSyscallArg(tc, index); 160511856Sbrandon.potter@amd.com size_t count = p->getSyscallArg(tc, index); 16061999SN/A struct iovec hiov[count]; 16076227Snate@binkert.org for (size_t i = 0; i < count; ++i) { 16081999SN/A typename OS::tgt_iovec tiov; 16092461SN/A 161011856Sbrandon.potter@amd.com prox.readBlob(tiov_base + i*sizeof(typename OS::tgt_iovec), 161111856Sbrandon.potter@amd.com (uint8_t*)&tiov, sizeof(typename OS::tgt_iovec)); 16128737Skoansin.tan@gmail.com hiov[i].iov_len = TheISA::gtoh(tiov.iov_len); 16131999SN/A hiov[i].iov_base = new char [hiov[i].iov_len]; 161411856Sbrandon.potter@amd.com prox.readBlob(TheISA::gtoh(tiov.iov_base), (uint8_t *)hiov[i].iov_base, 161511856Sbrandon.potter@amd.com hiov[i].iov_len); 16161999SN/A } 16171999SN/A 161810931Sbrandon.potter@amd.com int result = writev(sim_fd, hiov, count); 16191999SN/A 16206227Snate@binkert.org for (size_t i = 0; i < count; ++i) 16211999SN/A delete [] (char *)hiov[i].iov_base; 16221999SN/A 162313572Sbrandon.potter@amd.com return (result == -1) ? -errno : result; 16241999SN/A} 16251999SN/A 162611385Sbrandon.potter@amd.com/// Real mmap handler. 1627360SN/Atemplate <class OS> 16281450SN/ASyscallReturn 162911851Sbrandon.potter@amd.commmapImpl(SyscallDesc *desc, int num, Process *p, ThreadContext *tc, 163011385Sbrandon.potter@amd.com bool is_mmap2) 1631360SN/A{ 16326701Sgblack@eecs.umich.edu int index = 0; 16336701Sgblack@eecs.umich.edu Addr start = p->getSyscallArg(tc, index); 16346701Sgblack@eecs.umich.edu uint64_t length = p->getSyscallArg(tc, index); 163511383Sbrandon.potter@amd.com int prot = p->getSyscallArg(tc, index); 163611383Sbrandon.potter@amd.com int tgt_flags = p->getSyscallArg(tc, index); 16378324Ssteve.reinhardt@amd.com int tgt_fd = p->getSyscallArg(tc, index); 163810486Stjablin@gmail.com int offset = p->getSyscallArg(tc, index); 1639360SN/A 164011385Sbrandon.potter@amd.com if (is_mmap2) 164111385Sbrandon.potter@amd.com offset *= TheISA::PageBytes; 16429008Sgblack@eecs.umich.edu 164311383Sbrandon.potter@amd.com if (start & (TheISA::PageBytes - 1) || 164411383Sbrandon.potter@amd.com offset & (TheISA::PageBytes - 1) || 164511383Sbrandon.potter@amd.com (tgt_flags & OS::TGT_MAP_PRIVATE && 164611383Sbrandon.potter@amd.com tgt_flags & OS::TGT_MAP_SHARED) || 164711383Sbrandon.potter@amd.com (!(tgt_flags & OS::TGT_MAP_PRIVATE) && 164811383Sbrandon.potter@amd.com !(tgt_flags & OS::TGT_MAP_SHARED)) || 164911383Sbrandon.potter@amd.com !length) { 165011383Sbrandon.potter@amd.com return -EINVAL; 165111383Sbrandon.potter@amd.com } 16528324Ssteve.reinhardt@amd.com 165311383Sbrandon.potter@amd.com if ((prot & PROT_WRITE) && (tgt_flags & OS::TGT_MAP_SHARED)) { 165411383Sbrandon.potter@amd.com // With shared mmaps, there are two cases to consider: 165511383Sbrandon.potter@amd.com // 1) anonymous: writes should modify the mapping and this should be 165611383Sbrandon.potter@amd.com // visible to observers who share the mapping. Currently, it's 165711383Sbrandon.potter@amd.com // difficult to update the shared mapping because there's no 165811383Sbrandon.potter@amd.com // structure which maintains information about the which virtual 165911383Sbrandon.potter@amd.com // memory areas are shared. If that structure existed, it would be 166011383Sbrandon.potter@amd.com // possible to make the translations point to the same frames. 166111383Sbrandon.potter@amd.com // 2) file-backed: writes should modify the mapping and the file 166211383Sbrandon.potter@amd.com // which is backed by the mapping. The shared mapping problem is the 166311383Sbrandon.potter@amd.com // same as what was mentioned about the anonymous mappings. For 166411383Sbrandon.potter@amd.com // file-backed mappings, the writes to the file are difficult 166511383Sbrandon.potter@amd.com // because it requires syncing what the mapping holds with the file 166611383Sbrandon.potter@amd.com // that resides on the host system. So, any write on a real system 166711383Sbrandon.potter@amd.com // would cause the change to be propagated to the file mapping at 166811383Sbrandon.potter@amd.com // some point in the future (the inode is tracked along with the 166911383Sbrandon.potter@amd.com // mapping). This isn't guaranteed to always happen, but it usually 167011383Sbrandon.potter@amd.com // works well enough. The guarantee is provided by the msync system 167111383Sbrandon.potter@amd.com // call. We could force the change through with shared mappings with 167211383Sbrandon.potter@amd.com // a call to msync, but that again would require more information 167311383Sbrandon.potter@amd.com // than we currently maintain. 167411383Sbrandon.potter@amd.com warn("mmap: writing to shared mmap region is currently " 167511383Sbrandon.potter@amd.com "unsupported. The write succeeds on the target, but it " 167611383Sbrandon.potter@amd.com "will not be propagated to the host or shared mappings"); 16778324Ssteve.reinhardt@amd.com } 16785877Shsul@eecs.umich.edu 167910486Stjablin@gmail.com length = roundUp(length, TheISA::PageBytes); 168010486Stjablin@gmail.com 168111383Sbrandon.potter@amd.com int sim_fd = -1; 168211383Sbrandon.potter@amd.com uint8_t *pmap = nullptr; 168311383Sbrandon.potter@amd.com if (!(tgt_flags & OS::TGT_MAP_ANONYMOUS)) { 168411856Sbrandon.potter@amd.com std::shared_ptr<FDEntry> fdep = (*p->fds)[tgt_fd]; 168511624Smichael.lebeane@amd.com 168611856Sbrandon.potter@amd.com auto dfdp = std::dynamic_pointer_cast<DeviceFDEntry>(fdep); 168711856Sbrandon.potter@amd.com if (dfdp) { 168811856Sbrandon.potter@amd.com EmulatedDriver *emul_driver = dfdp->getDriver(); 168911856Sbrandon.potter@amd.com return emul_driver->mmap(p, tc, start, length, prot, 169011624Smichael.lebeane@amd.com tgt_flags, tgt_fd, offset); 169111624Smichael.lebeane@amd.com } 169211624Smichael.lebeane@amd.com 169311856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(fdep); 169411856Sbrandon.potter@amd.com if (!ffdp) 169511383Sbrandon.potter@amd.com return -EBADF; 169611856Sbrandon.potter@amd.com sim_fd = ffdp->getSimFD(); 1697360SN/A 169811913SBrandon.Potter@amd.com pmap = (decltype(pmap))mmap(nullptr, length, PROT_READ, MAP_PRIVATE, 169911383Sbrandon.potter@amd.com sim_fd, offset); 17008600Ssteve.reinhardt@amd.com 170111383Sbrandon.potter@amd.com if (pmap == (decltype(pmap))-1) { 170211383Sbrandon.potter@amd.com warn("mmap: failed to map file into host address space"); 170311383Sbrandon.potter@amd.com return -errno; 17048600Ssteve.reinhardt@amd.com } 17052544SN/A } 17062544SN/A 170711383Sbrandon.potter@amd.com // Extend global mmap region if necessary. Note that we ignore the 170811383Sbrandon.potter@amd.com // start address unless MAP_FIXED is specified. 170911383Sbrandon.potter@amd.com if (!(tgt_flags & OS::TGT_MAP_FIXED)) { 171011905SBrandon.Potter@amd.com std::shared_ptr<MemState> mem_state = p->memState; 171111905SBrandon.Potter@amd.com Addr mmap_end = mem_state->getMmapEnd(); 171211905SBrandon.Potter@amd.com 171311905SBrandon.Potter@amd.com start = p->mmapGrowsDown() ? mmap_end - length : mmap_end; 171411905SBrandon.Potter@amd.com mmap_end = p->mmapGrowsDown() ? start : mmap_end + length; 171511905SBrandon.Potter@amd.com 171611905SBrandon.Potter@amd.com mem_state->setMmapEnd(mmap_end); 171711383Sbrandon.potter@amd.com } 171811383Sbrandon.potter@amd.com 171911383Sbrandon.potter@amd.com DPRINTF_SYSCALL(Verbose, " mmap range is 0x%x - 0x%x\n", 172011383Sbrandon.potter@amd.com start, start + length - 1); 172111383Sbrandon.potter@amd.com 172211383Sbrandon.potter@amd.com // We only allow mappings to overwrite existing mappings if 172311383Sbrandon.potter@amd.com // TGT_MAP_FIXED is set. Otherwise it shouldn't be a problem 172411383Sbrandon.potter@amd.com // because we ignore the start hint if TGT_MAP_FIXED is not set. 172511383Sbrandon.potter@amd.com int clobber = tgt_flags & OS::TGT_MAP_FIXED; 172611383Sbrandon.potter@amd.com if (clobber) { 172711383Sbrandon.potter@amd.com for (auto tc : p->system->threadContexts) { 172811383Sbrandon.potter@amd.com // If we might be overwriting old mappings, we need to 172911383Sbrandon.potter@amd.com // invalidate potentially stale mappings out of the TLBs. 173011383Sbrandon.potter@amd.com tc->getDTBPtr()->flushAll(); 173111383Sbrandon.potter@amd.com tc->getITBPtr()->flushAll(); 17328600Ssteve.reinhardt@amd.com } 17336672Sgblack@eecs.umich.edu } 17348600Ssteve.reinhardt@amd.com 173511383Sbrandon.potter@amd.com // Allocate physical memory and map it in. If the page table is already 173611383Sbrandon.potter@amd.com // mapped and clobber is not set, the simulator will issue throw a 173711383Sbrandon.potter@amd.com // fatal and bail out of the simulation. 17388601Ssteve.reinhardt@amd.com p->allocateMem(start, length, clobber); 17392544SN/A 174011383Sbrandon.potter@amd.com // Transfer content into target address space. 174111383Sbrandon.potter@amd.com SETranslatingPortProxy &tp = tc->getMemProxy(); 174211383Sbrandon.potter@amd.com if (tgt_flags & OS::TGT_MAP_ANONYMOUS) { 174311383Sbrandon.potter@amd.com // In general, we should zero the mapped area for anonymous mappings, 174411383Sbrandon.potter@amd.com // with something like: 174511383Sbrandon.potter@amd.com // tp.memsetBlob(start, 0, length); 174611383Sbrandon.potter@amd.com // However, given that we don't support sparse mappings, and 174711383Sbrandon.potter@amd.com // some applications can map a couple of gigabytes of space 174811383Sbrandon.potter@amd.com // (intending sparse usage), that can get painfully expensive. 174911383Sbrandon.potter@amd.com // Fortunately, since we don't properly implement munmap either, 175011383Sbrandon.potter@amd.com // there's no danger of remapping used memory, so for now all 175111383Sbrandon.potter@amd.com // newly mapped memory should already be zeroed so we can skip it. 175211383Sbrandon.potter@amd.com } else { 175311383Sbrandon.potter@amd.com // It is possible to mmap an area larger than a file, however 175411383Sbrandon.potter@amd.com // accessing unmapped portions the system triggers a "Bus error" 175511383Sbrandon.potter@amd.com // on the host. We must know when to stop copying the file from 175611383Sbrandon.potter@amd.com // the host into the target address space. 175711383Sbrandon.potter@amd.com struct stat file_stat; 175811383Sbrandon.potter@amd.com if (fstat(sim_fd, &file_stat) > 0) 175911383Sbrandon.potter@amd.com fatal("mmap: cannot stat file"); 176011383Sbrandon.potter@amd.com 176111383Sbrandon.potter@amd.com // Copy the portion of the file that is resident. This requires 176211383Sbrandon.potter@amd.com // checking both the mmap size and the filesize that we are 176311383Sbrandon.potter@amd.com // trying to mmap into this space; the mmap size also depends 176411383Sbrandon.potter@amd.com // on the specified offset into the file. 176511383Sbrandon.potter@amd.com uint64_t size = std::min((uint64_t)file_stat.st_size - offset, 176611383Sbrandon.potter@amd.com length); 176711383Sbrandon.potter@amd.com tp.writeBlob(start, pmap, size); 176811383Sbrandon.potter@amd.com 176911383Sbrandon.potter@amd.com // Cleanup the mmap region before exiting this function. 177011383Sbrandon.potter@amd.com munmap(pmap, length); 177111383Sbrandon.potter@amd.com 177211392Sbrandon.potter@amd.com // Maintain the symbol table for dynamic executables. 177311392Sbrandon.potter@amd.com // The loader will call mmap to map the images into its address 177411392Sbrandon.potter@amd.com // space and we intercept that here. We can verify that we are 177511392Sbrandon.potter@amd.com // executing inside the loader by checking the program counter value. 177611392Sbrandon.potter@amd.com // XXX: with multiprogrammed workloads or multi-node configurations, 177711392Sbrandon.potter@amd.com // this will not work since there is a single global symbol table. 177811392Sbrandon.potter@amd.com ObjectFile *interpreter = p->getInterpreter(); 177911392Sbrandon.potter@amd.com if (interpreter) { 178011392Sbrandon.potter@amd.com Addr text_start = interpreter->textBase(); 178111392Sbrandon.potter@amd.com Addr text_end = text_start + interpreter->textSize(); 178211392Sbrandon.potter@amd.com 178311392Sbrandon.potter@amd.com Addr pc = tc->pcState().pc(); 178411392Sbrandon.potter@amd.com 178511392Sbrandon.potter@amd.com if (pc >= text_start && pc < text_end) { 178611856Sbrandon.potter@amd.com std::shared_ptr<FDEntry> fdep = (*p->fds)[tgt_fd]; 178711856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(fdep); 178811856Sbrandon.potter@amd.com ObjectFile *lib = createObjectFile(ffdp->getFileName()); 178911392Sbrandon.potter@amd.com 179011392Sbrandon.potter@amd.com if (lib) { 179111392Sbrandon.potter@amd.com lib->loadAllSymbols(debugSymbolTable, 179211392Sbrandon.potter@amd.com lib->textBase(), start); 179311392Sbrandon.potter@amd.com } 179411392Sbrandon.potter@amd.com } 179511392Sbrandon.potter@amd.com } 179611392Sbrandon.potter@amd.com 179711383Sbrandon.potter@amd.com // Note that we do not zero out the remainder of the mapping. This 179811383Sbrandon.potter@amd.com // is done by a real system, but it probably will not affect 179911383Sbrandon.potter@amd.com // execution (hopefully). 180011383Sbrandon.potter@amd.com } 180111383Sbrandon.potter@amd.com 18021458SN/A return start; 1803360SN/A} 1804360SN/A 180511593Santhony.gutierrez@amd.comtemplate <class OS> 180611593Santhony.gutierrez@amd.comSyscallReturn 180711851Sbrandon.potter@amd.compwrite64Func(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 180811593Santhony.gutierrez@amd.com{ 180911593Santhony.gutierrez@amd.com int index = 0; 181011593Santhony.gutierrez@amd.com int tgt_fd = p->getSyscallArg(tc, index); 181111593Santhony.gutierrez@amd.com Addr bufPtr = p->getSyscallArg(tc, index); 181211593Santhony.gutierrez@amd.com int nbytes = p->getSyscallArg(tc, index); 181311593Santhony.gutierrez@amd.com int offset = p->getSyscallArg(tc, index); 181411593Santhony.gutierrez@amd.com 181511856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 181611856Sbrandon.potter@amd.com if (!ffdp) 181711593Santhony.gutierrez@amd.com return -EBADF; 181811856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 181911593Santhony.gutierrez@amd.com 182011593Santhony.gutierrez@amd.com BufferArg bufArg(bufPtr, nbytes); 182111593Santhony.gutierrez@amd.com bufArg.copyIn(tc->getMemProxy()); 182211593Santhony.gutierrez@amd.com 182311594Santhony.gutierrez@amd.com int bytes_written = pwrite(sim_fd, bufArg.bufferPtr(), nbytes, offset); 182411593Santhony.gutierrez@amd.com 182511593Santhony.gutierrez@amd.com return (bytes_written == -1) ? -errno : bytes_written; 182611593Santhony.gutierrez@amd.com} 182711593Santhony.gutierrez@amd.com 182811385Sbrandon.potter@amd.com/// Target mmap() handler. 182911385Sbrandon.potter@amd.comtemplate <class OS> 183011385Sbrandon.potter@amd.comSyscallReturn 183111851Sbrandon.potter@amd.commmapFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 183211385Sbrandon.potter@amd.com{ 183311385Sbrandon.potter@amd.com return mmapImpl<OS>(desc, num, p, tc, false); 183411385Sbrandon.potter@amd.com} 183511385Sbrandon.potter@amd.com 183611385Sbrandon.potter@amd.com/// Target mmap2() handler. 183711385Sbrandon.potter@amd.comtemplate <class OS> 183811385Sbrandon.potter@amd.comSyscallReturn 183911851Sbrandon.potter@amd.commmap2Func(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 184011385Sbrandon.potter@amd.com{ 184111385Sbrandon.potter@amd.com return mmapImpl<OS>(desc, num, p, tc, true); 184211385Sbrandon.potter@amd.com} 184311385Sbrandon.potter@amd.com 1844378SN/A/// Target getrlimit() handler. 1845360SN/Atemplate <class OS> 18461450SN/ASyscallReturn 184711851Sbrandon.potter@amd.comgetrlimitFunc(SyscallDesc *desc, int callnum, Process *process, 184811851Sbrandon.potter@amd.com ThreadContext *tc) 1849360SN/A{ 18506701Sgblack@eecs.umich.edu int index = 0; 18516701Sgblack@eecs.umich.edu unsigned resource = process->getSyscallArg(tc, index); 18526701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::rlimit> rlp(process->getSyscallArg(tc, index)); 1853360SN/A 1854360SN/A switch (resource) { 185511906SBrandon.Potter@amd.com case OS::TGT_RLIMIT_STACK: 185611906SBrandon.Potter@amd.com // max stack size in bytes: make up a number (8MB for now) 185711906SBrandon.Potter@amd.com rlp->rlim_cur = rlp->rlim_max = 8 * 1024 * 1024; 185811906SBrandon.Potter@amd.com rlp->rlim_cur = TheISA::htog(rlp->rlim_cur); 185911906SBrandon.Potter@amd.com rlp->rlim_max = TheISA::htog(rlp->rlim_max); 186011906SBrandon.Potter@amd.com break; 1861360SN/A 186211906SBrandon.Potter@amd.com case OS::TGT_RLIMIT_DATA: 186311906SBrandon.Potter@amd.com // max data segment size in bytes: make up a number 186411906SBrandon.Potter@amd.com rlp->rlim_cur = rlp->rlim_max = 256 * 1024 * 1024; 186511906SBrandon.Potter@amd.com rlp->rlim_cur = TheISA::htog(rlp->rlim_cur); 186611906SBrandon.Potter@amd.com rlp->rlim_max = TheISA::htog(rlp->rlim_max); 186711906SBrandon.Potter@amd.com break; 18685877Shsul@eecs.umich.edu 186911906SBrandon.Potter@amd.com default: 187011906SBrandon.Potter@amd.com warn("getrlimit: unimplemented resource %d", resource); 187111906SBrandon.Potter@amd.com return -EINVAL; 187211906SBrandon.Potter@amd.com break; 1873360SN/A } 1874360SN/A 18758706Sandreas.hansson@arm.com rlp.copyOut(tc->getMemProxy()); 18761458SN/A return 0; 1877360SN/A} 1878360SN/A 187912235Sar4jc@virginia.edutemplate <class OS> 188012235Sar4jc@virginia.eduSyscallReturn 188112235Sar4jc@virginia.eduprlimitFunc(SyscallDesc *desc, int callnum, Process *process, 188212235Sar4jc@virginia.edu ThreadContext *tc) 188312235Sar4jc@virginia.edu{ 188412235Sar4jc@virginia.edu int index = 0; 188512235Sar4jc@virginia.edu if (process->getSyscallArg(tc, index) != 0) 188612235Sar4jc@virginia.edu { 188712235Sar4jc@virginia.edu warn("prlimit: ignoring rlimits for nonzero pid"); 188812235Sar4jc@virginia.edu return -EPERM; 188912235Sar4jc@virginia.edu } 189012235Sar4jc@virginia.edu int resource = process->getSyscallArg(tc, index); 189112235Sar4jc@virginia.edu Addr n = process->getSyscallArg(tc, index); 189212235Sar4jc@virginia.edu if (n != 0) 189312235Sar4jc@virginia.edu warn("prlimit: ignoring new rlimit"); 189412235Sar4jc@virginia.edu Addr o = process->getSyscallArg(tc, index); 189512235Sar4jc@virginia.edu if (o != 0) 189612235Sar4jc@virginia.edu { 189712416Sqtt2@cornell.edu TypedBufferArg<typename OS::rlimit> rlp(o); 189812235Sar4jc@virginia.edu switch (resource) { 189912235Sar4jc@virginia.edu case OS::TGT_RLIMIT_STACK: 190012235Sar4jc@virginia.edu // max stack size in bytes: make up a number (8MB for now) 190112235Sar4jc@virginia.edu rlp->rlim_cur = rlp->rlim_max = 8 * 1024 * 1024; 190212235Sar4jc@virginia.edu rlp->rlim_cur = TheISA::htog(rlp->rlim_cur); 190312235Sar4jc@virginia.edu rlp->rlim_max = TheISA::htog(rlp->rlim_max); 190412235Sar4jc@virginia.edu break; 190512235Sar4jc@virginia.edu case OS::TGT_RLIMIT_DATA: 190612235Sar4jc@virginia.edu // max data segment size in bytes: make up a number 190712235Sar4jc@virginia.edu rlp->rlim_cur = rlp->rlim_max = 256*1024*1024; 190812235Sar4jc@virginia.edu rlp->rlim_cur = TheISA::htog(rlp->rlim_cur); 190912235Sar4jc@virginia.edu rlp->rlim_max = TheISA::htog(rlp->rlim_max); 191012593Sjason@lowepower.com break; 191112235Sar4jc@virginia.edu default: 191212235Sar4jc@virginia.edu warn("prlimit: unimplemented resource %d", resource); 191312235Sar4jc@virginia.edu return -EINVAL; 191412235Sar4jc@virginia.edu break; 191512235Sar4jc@virginia.edu } 191612235Sar4jc@virginia.edu rlp.copyOut(tc->getMemProxy()); 191712235Sar4jc@virginia.edu } 191812235Sar4jc@virginia.edu return 0; 191912235Sar4jc@virginia.edu} 192012235Sar4jc@virginia.edu 192110796Sbrandon.potter@amd.com/// Target clock_gettime() function. 192210796Sbrandon.potter@amd.comtemplate <class OS> 192310796Sbrandon.potter@amd.comSyscallReturn 192411851Sbrandon.potter@amd.comclock_gettimeFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 192510796Sbrandon.potter@amd.com{ 192610796Sbrandon.potter@amd.com int index = 1; 192710796Sbrandon.potter@amd.com //int clk_id = p->getSyscallArg(tc, index); 192810796Sbrandon.potter@amd.com TypedBufferArg<typename OS::timespec> tp(p->getSyscallArg(tc, index)); 192910796Sbrandon.potter@amd.com 193010796Sbrandon.potter@amd.com getElapsedTimeNano(tp->tv_sec, tp->tv_nsec); 193110796Sbrandon.potter@amd.com tp->tv_sec += seconds_since_epoch; 193210796Sbrandon.potter@amd.com tp->tv_sec = TheISA::htog(tp->tv_sec); 193310796Sbrandon.potter@amd.com tp->tv_nsec = TheISA::htog(tp->tv_nsec); 193410796Sbrandon.potter@amd.com 193510796Sbrandon.potter@amd.com tp.copyOut(tc->getMemProxy()); 193610796Sbrandon.potter@amd.com 193710796Sbrandon.potter@amd.com return 0; 193810796Sbrandon.potter@amd.com} 193910796Sbrandon.potter@amd.com 194011337SMichael.Lebeane@amd.com/// Target clock_getres() function. 194111337SMichael.Lebeane@amd.comtemplate <class OS> 194211337SMichael.Lebeane@amd.comSyscallReturn 194311851Sbrandon.potter@amd.comclock_getresFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 194411337SMichael.Lebeane@amd.com{ 194511337SMichael.Lebeane@amd.com int index = 1; 194611337SMichael.Lebeane@amd.com TypedBufferArg<typename OS::timespec> tp(p->getSyscallArg(tc, index)); 194711337SMichael.Lebeane@amd.com 194811337SMichael.Lebeane@amd.com // Set resolution at ns, which is what clock_gettime() returns 194911337SMichael.Lebeane@amd.com tp->tv_sec = 0; 195011337SMichael.Lebeane@amd.com tp->tv_nsec = 1; 195111337SMichael.Lebeane@amd.com 195211337SMichael.Lebeane@amd.com tp.copyOut(tc->getMemProxy()); 195311337SMichael.Lebeane@amd.com 195411337SMichael.Lebeane@amd.com return 0; 195511337SMichael.Lebeane@amd.com} 195611337SMichael.Lebeane@amd.com 1957378SN/A/// Target gettimeofday() handler. 1958360SN/Atemplate <class OS> 19591450SN/ASyscallReturn 196011851Sbrandon.potter@amd.comgettimeofdayFunc(SyscallDesc *desc, int callnum, Process *process, 196111851Sbrandon.potter@amd.com ThreadContext *tc) 1962360SN/A{ 19636701Sgblack@eecs.umich.edu int index = 0; 19646701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::timeval> tp(process->getSyscallArg(tc, index)); 1965360SN/A 196610796Sbrandon.potter@amd.com getElapsedTimeMicro(tp->tv_sec, tp->tv_usec); 1967360SN/A tp->tv_sec += seconds_since_epoch; 19686109Ssanchezd@stanford.edu tp->tv_sec = TheISA::htog(tp->tv_sec); 19696109Ssanchezd@stanford.edu tp->tv_usec = TheISA::htog(tp->tv_usec); 1970360SN/A 19718706Sandreas.hansson@arm.com tp.copyOut(tc->getMemProxy()); 1972360SN/A 19731458SN/A return 0; 1974360SN/A} 1975360SN/A 1976360SN/A 19771999SN/A/// Target utimes() handler. 19781999SN/Atemplate <class OS> 19791999SN/ASyscallReturn 198011851Sbrandon.potter@amd.comutimesFunc(SyscallDesc *desc, int callnum, Process *process, 19812680Sktlim@umich.edu ThreadContext *tc) 19821999SN/A{ 19831999SN/A std::string path; 19841999SN/A 19856701Sgblack@eecs.umich.edu int index = 0; 19868852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 19876701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 19886701Sgblack@eecs.umich.edu return -EFAULT; 19896701Sgblack@eecs.umich.edu } 19901999SN/A 19916701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::timeval [2]> 19926701Sgblack@eecs.umich.edu tp(process->getSyscallArg(tc, index)); 19938706Sandreas.hansson@arm.com tp.copyIn(tc->getMemProxy()); 19941999SN/A 19951999SN/A struct timeval hostTimeval[2]; 199611906SBrandon.Potter@amd.com for (int i = 0; i < 2; ++i) { 19978737Skoansin.tan@gmail.com hostTimeval[i].tv_sec = TheISA::gtoh((*tp)[i].tv_sec); 19988737Skoansin.tan@gmail.com hostTimeval[i].tv_usec = TheISA::gtoh((*tp)[i].tv_usec); 19991999SN/A } 20003669Sbinkertn@umich.edu 20013669Sbinkertn@umich.edu // Adjust path for current working directory 20023669Sbinkertn@umich.edu path = process->fullPath(path); 20033669Sbinkertn@umich.edu 20041999SN/A int result = utimes(path.c_str(), hostTimeval); 20051999SN/A 20061999SN/A if (result < 0) 20071999SN/A return -errno; 20081999SN/A 20091999SN/A return 0; 20101999SN/A} 201111886Sbrandon.potter@amd.com 201211886Sbrandon.potter@amd.comtemplate <class OS> 201311886Sbrandon.potter@amd.comSyscallReturn 201411886Sbrandon.potter@amd.comexecveFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 201511886Sbrandon.potter@amd.com{ 201611886Sbrandon.potter@amd.com desc->setFlags(0); 201711886Sbrandon.potter@amd.com 201811886Sbrandon.potter@amd.com int index = 0; 201911886Sbrandon.potter@amd.com std::string path; 202011886Sbrandon.potter@amd.com SETranslatingPortProxy & mem_proxy = tc->getMemProxy(); 202111886Sbrandon.potter@amd.com if (!mem_proxy.tryReadString(path, p->getSyscallArg(tc, index))) 202211886Sbrandon.potter@amd.com return -EFAULT; 202311886Sbrandon.potter@amd.com 202411886Sbrandon.potter@amd.com if (access(path.c_str(), F_OK) == -1) 202511886Sbrandon.potter@amd.com return -EACCES; 202611886Sbrandon.potter@amd.com 202711886Sbrandon.potter@amd.com auto read_in = [](std::vector<std::string> & vect, 202811886Sbrandon.potter@amd.com SETranslatingPortProxy & mem_proxy, 202911886Sbrandon.potter@amd.com Addr mem_loc) 203011886Sbrandon.potter@amd.com { 203111886Sbrandon.potter@amd.com for (int inc = 0; ; inc++) { 203211886Sbrandon.potter@amd.com BufferArg b((mem_loc + sizeof(Addr) * inc), sizeof(Addr)); 203311886Sbrandon.potter@amd.com b.copyIn(mem_proxy); 203411886Sbrandon.potter@amd.com 203511886Sbrandon.potter@amd.com if (!*(Addr*)b.bufferPtr()) 203611886Sbrandon.potter@amd.com break; 203711886Sbrandon.potter@amd.com 203811886Sbrandon.potter@amd.com vect.push_back(std::string()); 203911886Sbrandon.potter@amd.com mem_proxy.tryReadString(vect[inc], *(Addr*)b.bufferPtr()); 204011886Sbrandon.potter@amd.com } 204111886Sbrandon.potter@amd.com }; 204211886Sbrandon.potter@amd.com 204311886Sbrandon.potter@amd.com /** 204411886Sbrandon.potter@amd.com * Note that ProcessParams is generated by swig and there are no other 204511886Sbrandon.potter@amd.com * examples of how to create anything but this default constructor. The 204611886Sbrandon.potter@amd.com * fields are manually initialized instead of passing parameters to the 204711886Sbrandon.potter@amd.com * constructor. 204811886Sbrandon.potter@amd.com */ 204911886Sbrandon.potter@amd.com ProcessParams *pp = new ProcessParams(); 205011886Sbrandon.potter@amd.com pp->executable = path; 205111886Sbrandon.potter@amd.com Addr argv_mem_loc = p->getSyscallArg(tc, index); 205211886Sbrandon.potter@amd.com read_in(pp->cmd, mem_proxy, argv_mem_loc); 205311886Sbrandon.potter@amd.com Addr envp_mem_loc = p->getSyscallArg(tc, index); 205411886Sbrandon.potter@amd.com read_in(pp->env, mem_proxy, envp_mem_loc); 205511886Sbrandon.potter@amd.com pp->uid = p->uid(); 205611886Sbrandon.potter@amd.com pp->egid = p->egid(); 205711886Sbrandon.potter@amd.com pp->euid = p->euid(); 205811886Sbrandon.potter@amd.com pp->gid = p->gid(); 205911886Sbrandon.potter@amd.com pp->ppid = p->ppid(); 206011886Sbrandon.potter@amd.com pp->pid = p->pid(); 206111886Sbrandon.potter@amd.com pp->input.assign("cin"); 206211886Sbrandon.potter@amd.com pp->output.assign("cout"); 206311886Sbrandon.potter@amd.com pp->errout.assign("cerr"); 206411886Sbrandon.potter@amd.com pp->cwd.assign(p->getcwd()); 206511886Sbrandon.potter@amd.com pp->system = p->system; 206611886Sbrandon.potter@amd.com /** 206711886Sbrandon.potter@amd.com * Prevent process object creation with identical PIDs (which will trip 206811886Sbrandon.potter@amd.com * a fatal check in Process constructor). The execve call is supposed to 206911886Sbrandon.potter@amd.com * take over the currently executing process' identity but replace 207011886Sbrandon.potter@amd.com * whatever it is doing with a new process image. Instead of hijacking 207111886Sbrandon.potter@amd.com * the process object in the simulator, we create a new process object 207211886Sbrandon.potter@amd.com * and bind to the previous process' thread below (hijacking the thread). 207311886Sbrandon.potter@amd.com */ 207411886Sbrandon.potter@amd.com p->system->PIDs.erase(p->pid()); 207511886Sbrandon.potter@amd.com Process *new_p = pp->create(); 207611886Sbrandon.potter@amd.com delete pp; 207711886Sbrandon.potter@amd.com 207811886Sbrandon.potter@amd.com /** 207911886Sbrandon.potter@amd.com * Work through the file descriptor array and close any files marked 208011886Sbrandon.potter@amd.com * close-on-exec. 208111886Sbrandon.potter@amd.com */ 208211886Sbrandon.potter@amd.com new_p->fds = p->fds; 208311886Sbrandon.potter@amd.com for (int i = 0; i < new_p->fds->getSize(); i++) { 208411886Sbrandon.potter@amd.com std::shared_ptr<FDEntry> fdep = (*new_p->fds)[i]; 208511886Sbrandon.potter@amd.com if (fdep && fdep->getCOE()) 208611886Sbrandon.potter@amd.com new_p->fds->closeFDEntry(i); 208711886Sbrandon.potter@amd.com } 208811886Sbrandon.potter@amd.com 208911886Sbrandon.potter@amd.com *new_p->sigchld = true; 209011886Sbrandon.potter@amd.com 209111886Sbrandon.potter@amd.com delete p; 209211886Sbrandon.potter@amd.com tc->clearArchRegs(); 209311886Sbrandon.potter@amd.com tc->setProcessPtr(new_p); 209411886Sbrandon.potter@amd.com new_p->assignThreadContext(tc->contextId()); 209511886Sbrandon.potter@amd.com new_p->initState(); 209611886Sbrandon.potter@amd.com tc->activate(); 209711886Sbrandon.potter@amd.com TheISA::PCState pcState = tc->pcState(); 209811886Sbrandon.potter@amd.com tc->setNPC(pcState.instAddr()); 209911886Sbrandon.potter@amd.com 210011886Sbrandon.potter@amd.com desc->setFlags(SyscallDesc::SuppressReturnValue); 210111886Sbrandon.potter@amd.com return 0; 210211886Sbrandon.potter@amd.com} 210311886Sbrandon.potter@amd.com 2104378SN/A/// Target getrusage() function. 2105360SN/Atemplate <class OS> 21061450SN/ASyscallReturn 210711851Sbrandon.potter@amd.comgetrusageFunc(SyscallDesc *desc, int callnum, Process *process, 21082680Sktlim@umich.edu ThreadContext *tc) 2109360SN/A{ 21106701Sgblack@eecs.umich.edu int index = 0; 21116701Sgblack@eecs.umich.edu int who = process->getSyscallArg(tc, index); // THREAD, SELF, or CHILDREN 21126701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::rusage> rup(process->getSyscallArg(tc, index)); 2113360SN/A 21143670Sbinkertn@umich.edu rup->ru_utime.tv_sec = 0; 21153670Sbinkertn@umich.edu rup->ru_utime.tv_usec = 0; 2116360SN/A rup->ru_stime.tv_sec = 0; 2117360SN/A rup->ru_stime.tv_usec = 0; 2118360SN/A rup->ru_maxrss = 0; 2119360SN/A rup->ru_ixrss = 0; 2120360SN/A rup->ru_idrss = 0; 2121360SN/A rup->ru_isrss = 0; 2122360SN/A rup->ru_minflt = 0; 2123360SN/A rup->ru_majflt = 0; 2124360SN/A rup->ru_nswap = 0; 2125360SN/A rup->ru_inblock = 0; 2126360SN/A rup->ru_oublock = 0; 2127360SN/A rup->ru_msgsnd = 0; 2128360SN/A rup->ru_msgrcv = 0; 2129360SN/A rup->ru_nsignals = 0; 2130360SN/A rup->ru_nvcsw = 0; 2131360SN/A rup->ru_nivcsw = 0; 2132360SN/A 21333670Sbinkertn@umich.edu switch (who) { 21343670Sbinkertn@umich.edu case OS::TGT_RUSAGE_SELF: 213510796Sbrandon.potter@amd.com getElapsedTimeMicro(rup->ru_utime.tv_sec, rup->ru_utime.tv_usec); 21368737Skoansin.tan@gmail.com rup->ru_utime.tv_sec = TheISA::htog(rup->ru_utime.tv_sec); 21378737Skoansin.tan@gmail.com rup->ru_utime.tv_usec = TheISA::htog(rup->ru_utime.tv_usec); 21383670Sbinkertn@umich.edu break; 21393670Sbinkertn@umich.edu 21403670Sbinkertn@umich.edu case OS::TGT_RUSAGE_CHILDREN: 21413670Sbinkertn@umich.edu // do nothing. We have no child processes, so they take no time. 21423670Sbinkertn@umich.edu break; 21433670Sbinkertn@umich.edu 21443670Sbinkertn@umich.edu default: 21453670Sbinkertn@umich.edu // don't really handle THREAD or CHILDREN, but just warn and 21463670Sbinkertn@umich.edu // plow ahead 21473670Sbinkertn@umich.edu warn("getrusage() only supports RUSAGE_SELF. Parameter %d ignored.", 21483670Sbinkertn@umich.edu who); 21493670Sbinkertn@umich.edu } 21503670Sbinkertn@umich.edu 21518706Sandreas.hansson@arm.com rup.copyOut(tc->getMemProxy()); 2152360SN/A 21531458SN/A return 0; 2154360SN/A} 2155360SN/A 21566683Stjones1@inf.ed.ac.uk/// Target times() function. 21576683Stjones1@inf.ed.ac.uktemplate <class OS> 21586683Stjones1@inf.ed.ac.ukSyscallReturn 215911851Sbrandon.potter@amd.comtimesFunc(SyscallDesc *desc, int callnum, Process *process, 216011851Sbrandon.potter@amd.com ThreadContext *tc) 21616683Stjones1@inf.ed.ac.uk{ 21626701Sgblack@eecs.umich.edu int index = 0; 21636701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::tms> bufp(process->getSyscallArg(tc, index)); 21646683Stjones1@inf.ed.ac.uk 21656683Stjones1@inf.ed.ac.uk // Fill in the time structure (in clocks) 21667823Ssteve.reinhardt@amd.com int64_t clocks = curTick() * OS::M5_SC_CLK_TCK / SimClock::Int::s; 21676683Stjones1@inf.ed.ac.uk bufp->tms_utime = clocks; 21686683Stjones1@inf.ed.ac.uk bufp->tms_stime = 0; 21696683Stjones1@inf.ed.ac.uk bufp->tms_cutime = 0; 21706683Stjones1@inf.ed.ac.uk bufp->tms_cstime = 0; 21716683Stjones1@inf.ed.ac.uk 21726683Stjones1@inf.ed.ac.uk // Convert to host endianness 21738737Skoansin.tan@gmail.com bufp->tms_utime = TheISA::htog(bufp->tms_utime); 21746683Stjones1@inf.ed.ac.uk 21756683Stjones1@inf.ed.ac.uk // Write back 21768706Sandreas.hansson@arm.com bufp.copyOut(tc->getMemProxy()); 21776683Stjones1@inf.ed.ac.uk 21786683Stjones1@inf.ed.ac.uk // Return clock ticks since system boot 21796683Stjones1@inf.ed.ac.uk return clocks; 21806683Stjones1@inf.ed.ac.uk} 21812553SN/A 21826684Stjones1@inf.ed.ac.uk/// Target time() function. 21836684Stjones1@inf.ed.ac.uktemplate <class OS> 21846684Stjones1@inf.ed.ac.ukSyscallReturn 218511851Sbrandon.potter@amd.comtimeFunc(SyscallDesc *desc, int callnum, Process *process, ThreadContext *tc) 21866684Stjones1@inf.ed.ac.uk{ 21876684Stjones1@inf.ed.ac.uk typename OS::time_t sec, usec; 218810796Sbrandon.potter@amd.com getElapsedTimeMicro(sec, usec); 21896684Stjones1@inf.ed.ac.uk sec += seconds_since_epoch; 21906684Stjones1@inf.ed.ac.uk 21916701Sgblack@eecs.umich.edu int index = 0; 21926701Sgblack@eecs.umich.edu Addr taddr = (Addr)process->getSyscallArg(tc, index); 219311321Ssteve.reinhardt@amd.com if (taddr != 0) { 21946684Stjones1@inf.ed.ac.uk typename OS::time_t t = sec; 21958737Skoansin.tan@gmail.com t = TheISA::htog(t); 21968852Sandreas.hansson@arm.com SETranslatingPortProxy &p = tc->getMemProxy(); 21978852Sandreas.hansson@arm.com p.writeBlob(taddr, (uint8_t*)&t, (int)sizeof(typename OS::time_t)); 21986684Stjones1@inf.ed.ac.uk } 21996684Stjones1@inf.ed.ac.uk return sec; 22006684Stjones1@inf.ed.ac.uk} 22012553SN/A 220211910SBrandon.Potter@amd.comtemplate <class OS> 220311910SBrandon.Potter@amd.comSyscallReturn 220411910SBrandon.Potter@amd.comtgkillFunc(SyscallDesc *desc, int num, Process *process, ThreadContext *tc) 220511910SBrandon.Potter@amd.com{ 220611910SBrandon.Potter@amd.com int index = 0; 220711910SBrandon.Potter@amd.com int tgid = process->getSyscallArg(tc, index); 220811910SBrandon.Potter@amd.com int tid = process->getSyscallArg(tc, index); 220911910SBrandon.Potter@amd.com int sig = process->getSyscallArg(tc, index); 221011910SBrandon.Potter@amd.com 221111910SBrandon.Potter@amd.com /** 221211910SBrandon.Potter@amd.com * This system call is intended to allow killing a specific thread 221311910SBrandon.Potter@amd.com * within an arbitrary thread group if sanctioned with permission checks. 221411910SBrandon.Potter@amd.com * It's usually true that threads share the termination signal as pointed 221511910SBrandon.Potter@amd.com * out by the pthread_kill man page and this seems to be the intended 221611910SBrandon.Potter@amd.com * usage. Due to this being an emulated environment, assume the following: 221711910SBrandon.Potter@amd.com * Threads are allowed to call tgkill because the EUID for all threads 221811910SBrandon.Potter@amd.com * should be the same. There is no signal handling mechanism for kernel 221911910SBrandon.Potter@amd.com * registration of signal handlers since signals are poorly supported in 222011910SBrandon.Potter@amd.com * emulation mode. Since signal handlers cannot be registered, all 222111910SBrandon.Potter@amd.com * threads within in a thread group must share the termination signal. 222211910SBrandon.Potter@amd.com * We never exhaust PIDs so there's no chance of finding the wrong one 222311910SBrandon.Potter@amd.com * due to PID rollover. 222411910SBrandon.Potter@amd.com */ 222511910SBrandon.Potter@amd.com 222611910SBrandon.Potter@amd.com System *sys = tc->getSystemPtr(); 222711910SBrandon.Potter@amd.com Process *tgt_proc = nullptr; 222811910SBrandon.Potter@amd.com for (int i = 0; i < sys->numContexts(); i++) { 222911910SBrandon.Potter@amd.com Process *temp = sys->threadContexts[i]->getProcessPtr(); 223011910SBrandon.Potter@amd.com if (temp->pid() == tid) { 223111910SBrandon.Potter@amd.com tgt_proc = temp; 223211910SBrandon.Potter@amd.com break; 223311910SBrandon.Potter@amd.com } 223411910SBrandon.Potter@amd.com } 223511910SBrandon.Potter@amd.com 223611910SBrandon.Potter@amd.com if (sig != 0 || sig != OS::TGT_SIGABRT) 223711910SBrandon.Potter@amd.com return -EINVAL; 223811910SBrandon.Potter@amd.com 223911910SBrandon.Potter@amd.com if (tgt_proc == nullptr) 224011910SBrandon.Potter@amd.com return -ESRCH; 224111910SBrandon.Potter@amd.com 224211910SBrandon.Potter@amd.com if (tgid != -1 && tgt_proc->tgid() != tgid) 224311910SBrandon.Potter@amd.com return -ESRCH; 224411910SBrandon.Potter@amd.com 224511910SBrandon.Potter@amd.com if (sig == OS::TGT_SIGABRT) 224611910SBrandon.Potter@amd.com exitGroupFunc(desc, 252, process, tc); 224711910SBrandon.Potter@amd.com 224811910SBrandon.Potter@amd.com return 0; 224911910SBrandon.Potter@amd.com} 225011910SBrandon.Potter@amd.com 225113568Sbrandon.potter@amd.comtemplate <class OS> 225213568Sbrandon.potter@amd.comSyscallReturn 225313568Sbrandon.potter@amd.comsocketFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 225413568Sbrandon.potter@amd.com{ 225513568Sbrandon.potter@amd.com int index = 0; 225613568Sbrandon.potter@amd.com int domain = p->getSyscallArg(tc, index); 225713568Sbrandon.potter@amd.com int type = p->getSyscallArg(tc, index); 225813568Sbrandon.potter@amd.com int prot = p->getSyscallArg(tc, index); 225913568Sbrandon.potter@amd.com 226013568Sbrandon.potter@amd.com int sim_fd = socket(domain, type, prot); 226113568Sbrandon.potter@amd.com if (sim_fd == -1) 226213568Sbrandon.potter@amd.com return -errno; 226313568Sbrandon.potter@amd.com 226413568Sbrandon.potter@amd.com auto sfdp = std::make_shared<SocketFDEntry>(sim_fd, domain, type, prot); 226513568Sbrandon.potter@amd.com int tgt_fd = p->fds->allocFD(sfdp); 226613568Sbrandon.potter@amd.com 226713568Sbrandon.potter@amd.com return tgt_fd; 226813568Sbrandon.potter@amd.com} 226913568Sbrandon.potter@amd.com 227013568Sbrandon.potter@amd.comtemplate <class OS> 227113568Sbrandon.potter@amd.comSyscallReturn 227213568Sbrandon.potter@amd.comsocketpairFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 227313568Sbrandon.potter@amd.com{ 227413568Sbrandon.potter@amd.com int index = 0; 227513568Sbrandon.potter@amd.com int domain = p->getSyscallArg(tc, index); 227613568Sbrandon.potter@amd.com int type = p->getSyscallArg(tc, index); 227713568Sbrandon.potter@amd.com int prot = p->getSyscallArg(tc, index); 227813568Sbrandon.potter@amd.com Addr svPtr = p->getSyscallArg(tc, index); 227913568Sbrandon.potter@amd.com 228013568Sbrandon.potter@amd.com BufferArg svBuf((Addr)svPtr, 2 * sizeof(int)); 228113568Sbrandon.potter@amd.com int status = socketpair(domain, type, prot, (int *)svBuf.bufferPtr()); 228213568Sbrandon.potter@amd.com if (status == -1) 228313568Sbrandon.potter@amd.com return -errno; 228413568Sbrandon.potter@amd.com 228513568Sbrandon.potter@amd.com int *fds = (int *)svBuf.bufferPtr(); 228613568Sbrandon.potter@amd.com 228713568Sbrandon.potter@amd.com auto sfdp1 = std::make_shared<SocketFDEntry>(fds[0], domain, type, prot); 228813568Sbrandon.potter@amd.com fds[0] = p->fds->allocFD(sfdp1); 228913568Sbrandon.potter@amd.com auto sfdp2 = std::make_shared<SocketFDEntry>(fds[1], domain, type, prot); 229013568Sbrandon.potter@amd.com fds[1] = p->fds->allocFD(sfdp2); 229113568Sbrandon.potter@amd.com svBuf.copyOut(tc->getMemProxy()); 229213568Sbrandon.potter@amd.com 229313568Sbrandon.potter@amd.com return status; 229413568Sbrandon.potter@amd.com} 22952553SN/A 229613570Sbrandon.potter@amd.comtemplate <class OS> 229713570Sbrandon.potter@amd.comSyscallReturn 229813570Sbrandon.potter@amd.comselectFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 229913570Sbrandon.potter@amd.com{ 230013570Sbrandon.potter@amd.com int retval; 230113570Sbrandon.potter@amd.com 230213570Sbrandon.potter@amd.com int index = 0; 230313570Sbrandon.potter@amd.com int nfds_t = p->getSyscallArg(tc, index); 230413570Sbrandon.potter@amd.com Addr fds_read_ptr = p->getSyscallArg(tc, index); 230513570Sbrandon.potter@amd.com Addr fds_writ_ptr = p->getSyscallArg(tc, index); 230613570Sbrandon.potter@amd.com Addr fds_excp_ptr = p->getSyscallArg(tc, index); 230713570Sbrandon.potter@amd.com Addr time_val_ptr = p->getSyscallArg(tc, index); 230813570Sbrandon.potter@amd.com 230913570Sbrandon.potter@amd.com TypedBufferArg<typename OS::fd_set> rd_t(fds_read_ptr); 231013570Sbrandon.potter@amd.com TypedBufferArg<typename OS::fd_set> wr_t(fds_writ_ptr); 231113570Sbrandon.potter@amd.com TypedBufferArg<typename OS::fd_set> ex_t(fds_excp_ptr); 231213570Sbrandon.potter@amd.com TypedBufferArg<typename OS::timeval> tp(time_val_ptr); 231313570Sbrandon.potter@amd.com 231413570Sbrandon.potter@amd.com /** 231513570Sbrandon.potter@amd.com * Host fields. Notice that these use the definitions from the system 231613570Sbrandon.potter@amd.com * headers instead of the gem5 headers and libraries. If the host and 231713570Sbrandon.potter@amd.com * target have different header file definitions, this will not work. 231813570Sbrandon.potter@amd.com */ 231913570Sbrandon.potter@amd.com fd_set rd_h; 232013570Sbrandon.potter@amd.com FD_ZERO(&rd_h); 232113570Sbrandon.potter@amd.com fd_set wr_h; 232213570Sbrandon.potter@amd.com FD_ZERO(&wr_h); 232313570Sbrandon.potter@amd.com fd_set ex_h; 232413570Sbrandon.potter@amd.com FD_ZERO(&ex_h); 232513570Sbrandon.potter@amd.com 232613570Sbrandon.potter@amd.com /** 232713570Sbrandon.potter@amd.com * Copy in the fd_set from the target. 232813570Sbrandon.potter@amd.com */ 232913570Sbrandon.potter@amd.com if (fds_read_ptr) 233013570Sbrandon.potter@amd.com rd_t.copyIn(tc->getMemProxy()); 233113570Sbrandon.potter@amd.com if (fds_writ_ptr) 233213570Sbrandon.potter@amd.com wr_t.copyIn(tc->getMemProxy()); 233313570Sbrandon.potter@amd.com if (fds_excp_ptr) 233413570Sbrandon.potter@amd.com ex_t.copyIn(tc->getMemProxy()); 233513570Sbrandon.potter@amd.com 233613570Sbrandon.potter@amd.com /** 233713570Sbrandon.potter@amd.com * We need to translate the target file descriptor set into a host file 233813570Sbrandon.potter@amd.com * descriptor set. This involves both our internal process fd array 233913570Sbrandon.potter@amd.com * and the fd_set defined in Linux header files. The nfds field also 234013570Sbrandon.potter@amd.com * needs to be updated as it will be only target specific after 234113570Sbrandon.potter@amd.com * retrieving it from the target; the nfds value is expected to be the 234213570Sbrandon.potter@amd.com * highest file descriptor that needs to be checked, so we need to extend 234313570Sbrandon.potter@amd.com * it out for nfds_h when we do the update. 234413570Sbrandon.potter@amd.com */ 234513570Sbrandon.potter@amd.com int nfds_h = 0; 234613570Sbrandon.potter@amd.com std::map<int, int> trans_map; 234713570Sbrandon.potter@amd.com auto try_add_host_set = [&](fd_set *tgt_set_entry, 234813570Sbrandon.potter@amd.com fd_set *hst_set_entry, 234913570Sbrandon.potter@amd.com int iter) -> bool 235013570Sbrandon.potter@amd.com { 235113570Sbrandon.potter@amd.com /** 235213570Sbrandon.potter@amd.com * By this point, we know that we are looking at a valid file 235313570Sbrandon.potter@amd.com * descriptor set on the target. We need to check if the target file 235413570Sbrandon.potter@amd.com * descriptor value passed in as iter is part of the set. 235513570Sbrandon.potter@amd.com */ 235613570Sbrandon.potter@amd.com if (FD_ISSET(iter, tgt_set_entry)) { 235713570Sbrandon.potter@amd.com /** 235813570Sbrandon.potter@amd.com * We know that the target file descriptor belongs to the set, 235913570Sbrandon.potter@amd.com * but we do not yet know if the file descriptor is valid or 236013570Sbrandon.potter@amd.com * that we have a host mapping. Check that now. 236113570Sbrandon.potter@amd.com */ 236213570Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[iter]); 236313570Sbrandon.potter@amd.com if (!hbfdp) 236413570Sbrandon.potter@amd.com return true; 236513570Sbrandon.potter@amd.com auto sim_fd = hbfdp->getSimFD(); 236613570Sbrandon.potter@amd.com 236713570Sbrandon.potter@amd.com /** 236813570Sbrandon.potter@amd.com * Add the sim_fd to tgt_fd translation into trans_map for use 236913570Sbrandon.potter@amd.com * later when we need to zero the target fd_set structures and 237013570Sbrandon.potter@amd.com * then update them with hits returned from the host select call. 237113570Sbrandon.potter@amd.com */ 237213570Sbrandon.potter@amd.com trans_map[sim_fd] = iter; 237313570Sbrandon.potter@amd.com 237413570Sbrandon.potter@amd.com /** 237513570Sbrandon.potter@amd.com * We know that the host file descriptor exists so now we check 237613570Sbrandon.potter@amd.com * if we need to update the max count for nfds_h before passing 237713570Sbrandon.potter@amd.com * the duplicated structure into the host. 237813570Sbrandon.potter@amd.com */ 237913570Sbrandon.potter@amd.com nfds_h = std::max(nfds_h - 1, sim_fd + 1); 238013570Sbrandon.potter@amd.com 238113570Sbrandon.potter@amd.com /** 238213570Sbrandon.potter@amd.com * Add the host file descriptor to the set that we are going to 238313570Sbrandon.potter@amd.com * pass into the host. 238413570Sbrandon.potter@amd.com */ 238513570Sbrandon.potter@amd.com FD_SET(sim_fd, hst_set_entry); 238613570Sbrandon.potter@amd.com } 238713570Sbrandon.potter@amd.com return false; 238813570Sbrandon.potter@amd.com }; 238913570Sbrandon.potter@amd.com 239013570Sbrandon.potter@amd.com for (int i = 0; i < nfds_t; i++) { 239113570Sbrandon.potter@amd.com if (fds_read_ptr) { 239213570Sbrandon.potter@amd.com bool ebadf = try_add_host_set((fd_set*)&*rd_t, &rd_h, i); 239313570Sbrandon.potter@amd.com if (ebadf) return -EBADF; 239413570Sbrandon.potter@amd.com } 239513570Sbrandon.potter@amd.com if (fds_writ_ptr) { 239613570Sbrandon.potter@amd.com bool ebadf = try_add_host_set((fd_set*)&*wr_t, &wr_h, i); 239713570Sbrandon.potter@amd.com if (ebadf) return -EBADF; 239813570Sbrandon.potter@amd.com } 239913570Sbrandon.potter@amd.com if (fds_excp_ptr) { 240013570Sbrandon.potter@amd.com bool ebadf = try_add_host_set((fd_set*)&*ex_t, &ex_h, i); 240113570Sbrandon.potter@amd.com if (ebadf) return -EBADF; 240213570Sbrandon.potter@amd.com } 240313570Sbrandon.potter@amd.com } 240413570Sbrandon.potter@amd.com 240513570Sbrandon.potter@amd.com if (time_val_ptr) { 240613570Sbrandon.potter@amd.com /** 240713570Sbrandon.potter@amd.com * It might be possible to decrement the timeval based on some 240813570Sbrandon.potter@amd.com * derivation of wall clock determined from elapsed simulator ticks 240913570Sbrandon.potter@amd.com * but that seems like overkill. Rather, we just set the timeval with 241013570Sbrandon.potter@amd.com * zero timeout. (There is no reason to block during the simulation 241113570Sbrandon.potter@amd.com * as it only decreases simulator performance.) 241213570Sbrandon.potter@amd.com */ 241313570Sbrandon.potter@amd.com tp->tv_sec = 0; 241413570Sbrandon.potter@amd.com tp->tv_usec = 0; 241513570Sbrandon.potter@amd.com 241613570Sbrandon.potter@amd.com retval = select(nfds_h, 241713570Sbrandon.potter@amd.com fds_read_ptr ? &rd_h : nullptr, 241813570Sbrandon.potter@amd.com fds_writ_ptr ? &wr_h : nullptr, 241913570Sbrandon.potter@amd.com fds_excp_ptr ? &ex_h : nullptr, 242013570Sbrandon.potter@amd.com (timeval*)&*tp); 242113570Sbrandon.potter@amd.com } else { 242213570Sbrandon.potter@amd.com /** 242313570Sbrandon.potter@amd.com * If the timeval pointer is null, setup a new timeval structure to 242413570Sbrandon.potter@amd.com * pass into the host select call. Unfortunately, we will need to 242513570Sbrandon.potter@amd.com * manually check the return value and throw a retry fault if the 242613570Sbrandon.potter@amd.com * return value is zero. Allowing the system call to block will 242713570Sbrandon.potter@amd.com * likely deadlock the event queue. 242813570Sbrandon.potter@amd.com */ 242913570Sbrandon.potter@amd.com struct timeval tv = { 0, 0 }; 243013570Sbrandon.potter@amd.com 243113570Sbrandon.potter@amd.com retval = select(nfds_h, 243213570Sbrandon.potter@amd.com fds_read_ptr ? &rd_h : nullptr, 243313570Sbrandon.potter@amd.com fds_writ_ptr ? &wr_h : nullptr, 243413570Sbrandon.potter@amd.com fds_excp_ptr ? &ex_h : nullptr, 243513570Sbrandon.potter@amd.com &tv); 243613570Sbrandon.potter@amd.com 243713570Sbrandon.potter@amd.com if (retval == 0) { 243813570Sbrandon.potter@amd.com /** 243913570Sbrandon.potter@amd.com * If blocking indefinitely, check the signal list to see if a 244013570Sbrandon.potter@amd.com * signal would break the poll out of the retry cycle and try to 244113570Sbrandon.potter@amd.com * return the signal interrupt instead. 244213570Sbrandon.potter@amd.com */ 244313570Sbrandon.potter@amd.com for (auto sig : tc->getSystemPtr()->signalList) 244413570Sbrandon.potter@amd.com if (sig.receiver == p) 244513570Sbrandon.potter@amd.com return -EINTR; 244613570Sbrandon.potter@amd.com return SyscallReturn::retry(); 244713570Sbrandon.potter@amd.com } 244813570Sbrandon.potter@amd.com } 244913570Sbrandon.potter@amd.com 245013570Sbrandon.potter@amd.com if (retval == -1) 245113570Sbrandon.potter@amd.com return -errno; 245213570Sbrandon.potter@amd.com 245313570Sbrandon.potter@amd.com FD_ZERO((fd_set*)&*rd_t); 245413570Sbrandon.potter@amd.com FD_ZERO((fd_set*)&*wr_t); 245513570Sbrandon.potter@amd.com FD_ZERO((fd_set*)&*ex_t); 245613570Sbrandon.potter@amd.com 245713570Sbrandon.potter@amd.com /** 245813570Sbrandon.potter@amd.com * We need to translate the host file descriptor set into a target file 245913570Sbrandon.potter@amd.com * descriptor set. This involves both our internal process fd array 246013570Sbrandon.potter@amd.com * and the fd_set defined in header files. 246113570Sbrandon.potter@amd.com */ 246213570Sbrandon.potter@amd.com for (int i = 0; i < nfds_h; i++) { 246313570Sbrandon.potter@amd.com if (fds_read_ptr) { 246413570Sbrandon.potter@amd.com if (FD_ISSET(i, &rd_h)) 246513570Sbrandon.potter@amd.com FD_SET(trans_map[i], (fd_set*)&*rd_t); 246613570Sbrandon.potter@amd.com } 246713570Sbrandon.potter@amd.com 246813570Sbrandon.potter@amd.com if (fds_writ_ptr) { 246913570Sbrandon.potter@amd.com if (FD_ISSET(i, &wr_h)) 247013570Sbrandon.potter@amd.com FD_SET(trans_map[i], (fd_set*)&*wr_t); 247113570Sbrandon.potter@amd.com } 247213570Sbrandon.potter@amd.com 247313570Sbrandon.potter@amd.com if (fds_excp_ptr) { 247413570Sbrandon.potter@amd.com if (FD_ISSET(i, &ex_h)) 247513570Sbrandon.potter@amd.com FD_SET(trans_map[i], (fd_set*)&*ex_t); 247613570Sbrandon.potter@amd.com } 247713570Sbrandon.potter@amd.com } 247813570Sbrandon.potter@amd.com 247913570Sbrandon.potter@amd.com if (fds_read_ptr) 248013570Sbrandon.potter@amd.com rd_t.copyOut(tc->getMemProxy()); 248113570Sbrandon.potter@amd.com if (fds_writ_ptr) 248213570Sbrandon.potter@amd.com wr_t.copyOut(tc->getMemProxy()); 248313570Sbrandon.potter@amd.com if (fds_excp_ptr) 248413570Sbrandon.potter@amd.com ex_t.copyOut(tc->getMemProxy()); 248513570Sbrandon.potter@amd.com if (time_val_ptr) 248613570Sbrandon.potter@amd.com tp.copyOut(tc->getMemProxy()); 248713570Sbrandon.potter@amd.com 248813570Sbrandon.potter@amd.com return retval; 248913570Sbrandon.potter@amd.com} 249013570Sbrandon.potter@amd.com 249113570Sbrandon.potter@amd.comtemplate <class OS> 249213570Sbrandon.potter@amd.comSyscallReturn 249313570Sbrandon.potter@amd.comreadFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 249413570Sbrandon.potter@amd.com{ 249513570Sbrandon.potter@amd.com int index = 0; 249613570Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 249713570Sbrandon.potter@amd.com Addr buf_ptr = p->getSyscallArg(tc, index); 249813570Sbrandon.potter@amd.com int nbytes = p->getSyscallArg(tc, index); 249913570Sbrandon.potter@amd.com 250013570Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 250113570Sbrandon.potter@amd.com if (!hbfdp) 250213570Sbrandon.potter@amd.com return -EBADF; 250313570Sbrandon.potter@amd.com int sim_fd = hbfdp->getSimFD(); 250413570Sbrandon.potter@amd.com 250513570Sbrandon.potter@amd.com struct pollfd pfd; 250613570Sbrandon.potter@amd.com pfd.fd = sim_fd; 250713570Sbrandon.potter@amd.com pfd.events = POLLIN | POLLPRI; 250813570Sbrandon.potter@amd.com if ((poll(&pfd, 1, 0) == 0) 250913570Sbrandon.potter@amd.com && !(hbfdp->getFlags() & OS::TGT_O_NONBLOCK)) 251013570Sbrandon.potter@amd.com return SyscallReturn::retry(); 251113570Sbrandon.potter@amd.com 251213570Sbrandon.potter@amd.com BufferArg buf_arg(buf_ptr, nbytes); 251313570Sbrandon.potter@amd.com int bytes_read = read(sim_fd, buf_arg.bufferPtr(), nbytes); 251413570Sbrandon.potter@amd.com 251513570Sbrandon.potter@amd.com if (bytes_read > 0) 251613570Sbrandon.potter@amd.com buf_arg.copyOut(tc->getMemProxy()); 251713570Sbrandon.potter@amd.com 251813570Sbrandon.potter@amd.com return (bytes_read == -1) ? -errno : bytes_read; 251913570Sbrandon.potter@amd.com} 252013570Sbrandon.potter@amd.com 252113570Sbrandon.potter@amd.comtemplate <class OS> 252213570Sbrandon.potter@amd.comSyscallReturn 252313570Sbrandon.potter@amd.comwriteFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 252413570Sbrandon.potter@amd.com{ 252513570Sbrandon.potter@amd.com int index = 0; 252613570Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 252713570Sbrandon.potter@amd.com Addr buf_ptr = p->getSyscallArg(tc, index); 252813570Sbrandon.potter@amd.com int nbytes = p->getSyscallArg(tc, index); 252913570Sbrandon.potter@amd.com 253013570Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 253113570Sbrandon.potter@amd.com if (!hbfdp) 253213570Sbrandon.potter@amd.com return -EBADF; 253313570Sbrandon.potter@amd.com int sim_fd = hbfdp->getSimFD(); 253413570Sbrandon.potter@amd.com 253513570Sbrandon.potter@amd.com BufferArg buf_arg(buf_ptr, nbytes); 253613570Sbrandon.potter@amd.com buf_arg.copyIn(tc->getMemProxy()); 253713570Sbrandon.potter@amd.com 253813570Sbrandon.potter@amd.com struct pollfd pfd; 253913570Sbrandon.potter@amd.com pfd.fd = sim_fd; 254013570Sbrandon.potter@amd.com pfd.events = POLLOUT; 254113570Sbrandon.potter@amd.com 254213570Sbrandon.potter@amd.com /** 254313570Sbrandon.potter@amd.com * We don't want to poll on /dev/random. The kernel will not enable the 254413570Sbrandon.potter@amd.com * file descriptor for writing unless the entropy in the system falls 254513570Sbrandon.potter@amd.com * below write_wakeup_threshold. This is not guaranteed to happen 254613570Sbrandon.potter@amd.com * depending on host settings. 254713570Sbrandon.potter@amd.com */ 254813570Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(hbfdp); 254913570Sbrandon.potter@amd.com if (ffdp && (ffdp->getFileName() != "/dev/random")) { 255013570Sbrandon.potter@amd.com if (!poll(&pfd, 1, 0) && !(ffdp->getFlags() & OS::TGT_O_NONBLOCK)) 255113570Sbrandon.potter@amd.com return SyscallReturn::retry(); 255213570Sbrandon.potter@amd.com } 255313570Sbrandon.potter@amd.com 255413570Sbrandon.potter@amd.com int bytes_written = write(sim_fd, buf_arg.bufferPtr(), nbytes); 255513570Sbrandon.potter@amd.com 255613570Sbrandon.potter@amd.com if (bytes_written != -1) 255713570Sbrandon.potter@amd.com fsync(sim_fd); 255813570Sbrandon.potter@amd.com 255913570Sbrandon.potter@amd.com return (bytes_written == -1) ? -errno : bytes_written; 256013570Sbrandon.potter@amd.com} 256113570Sbrandon.potter@amd.com 256213570Sbrandon.potter@amd.comtemplate <class OS> 256313570Sbrandon.potter@amd.comSyscallReturn 256413570Sbrandon.potter@amd.comwait4Func(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 256513570Sbrandon.potter@amd.com{ 256613570Sbrandon.potter@amd.com int index = 0; 256713570Sbrandon.potter@amd.com pid_t pid = p->getSyscallArg(tc, index); 256813570Sbrandon.potter@amd.com Addr statPtr = p->getSyscallArg(tc, index); 256913570Sbrandon.potter@amd.com int options = p->getSyscallArg(tc, index); 257013570Sbrandon.potter@amd.com Addr rusagePtr = p->getSyscallArg(tc, index); 257113570Sbrandon.potter@amd.com 257213570Sbrandon.potter@amd.com if (rusagePtr) 257313570Sbrandon.potter@amd.com DPRINTFR(SyscallVerbose, 257413570Sbrandon.potter@amd.com "%d: %s: syscall wait4: rusage pointer provided however " 257513570Sbrandon.potter@amd.com "functionality not supported. Ignoring rusage pointer.\n", 257613570Sbrandon.potter@amd.com curTick(), tc->getCpuPtr()->name()); 257713570Sbrandon.potter@amd.com 257813570Sbrandon.potter@amd.com /** 257913570Sbrandon.potter@amd.com * Currently, wait4 is only implemented so that it will wait for children 258013570Sbrandon.potter@amd.com * exit conditions which are denoted by a SIGCHLD signals posted into the 258113570Sbrandon.potter@amd.com * system signal list. We return no additional information via any of the 258213570Sbrandon.potter@amd.com * parameters supplied to wait4. If nothing is found in the system signal 258313570Sbrandon.potter@amd.com * list, we will wait indefinitely for SIGCHLD to post by retrying the 258413570Sbrandon.potter@amd.com * call. 258513570Sbrandon.potter@amd.com */ 258613570Sbrandon.potter@amd.com System *sysh = tc->getSystemPtr(); 258713570Sbrandon.potter@amd.com std::list<BasicSignal>::iterator iter; 258813570Sbrandon.potter@amd.com for (iter=sysh->signalList.begin(); iter!=sysh->signalList.end(); iter++) { 258913570Sbrandon.potter@amd.com if (iter->receiver == p) { 259013570Sbrandon.potter@amd.com if (pid < -1) { 259113570Sbrandon.potter@amd.com if ((iter->sender->pgid() == -pid) 259213570Sbrandon.potter@amd.com && (iter->signalValue == OS::TGT_SIGCHLD)) 259313570Sbrandon.potter@amd.com goto success; 259413570Sbrandon.potter@amd.com } else if (pid == -1) { 259513570Sbrandon.potter@amd.com if (iter->signalValue == OS::TGT_SIGCHLD) 259613570Sbrandon.potter@amd.com goto success; 259713570Sbrandon.potter@amd.com } else if (pid == 0) { 259813570Sbrandon.potter@amd.com if ((iter->sender->pgid() == p->pgid()) 259913570Sbrandon.potter@amd.com && (iter->signalValue == OS::TGT_SIGCHLD)) 260013570Sbrandon.potter@amd.com goto success; 260113570Sbrandon.potter@amd.com } else { 260213570Sbrandon.potter@amd.com if ((iter->sender->pid() == pid) 260313570Sbrandon.potter@amd.com && (iter->signalValue == OS::TGT_SIGCHLD)) 260413570Sbrandon.potter@amd.com goto success; 260513570Sbrandon.potter@amd.com } 260613570Sbrandon.potter@amd.com } 260713570Sbrandon.potter@amd.com } 260813570Sbrandon.potter@amd.com 260913570Sbrandon.potter@amd.com return (options & OS::TGT_WNOHANG) ? 0 : SyscallReturn::retry(); 261013570Sbrandon.potter@amd.com 261113570Sbrandon.potter@amd.comsuccess: 261213570Sbrandon.potter@amd.com // Set status to EXITED for WIFEXITED evaluations. 261313570Sbrandon.potter@amd.com const int EXITED = 0; 261413570Sbrandon.potter@amd.com BufferArg statusBuf(statPtr, sizeof(int)); 261513570Sbrandon.potter@amd.com *(int *)statusBuf.bufferPtr() = EXITED; 261613570Sbrandon.potter@amd.com statusBuf.copyOut(tc->getMemProxy()); 261713570Sbrandon.potter@amd.com 261813570Sbrandon.potter@amd.com // Return the child PID. 261913570Sbrandon.potter@amd.com pid_t retval = iter->sender->pid(); 262013570Sbrandon.potter@amd.com sysh->signalList.erase(iter); 262113570Sbrandon.potter@amd.com return retval; 262213570Sbrandon.potter@amd.com} 262313570Sbrandon.potter@amd.com 262413570Sbrandon.potter@amd.comtemplate <class OS> 262513570Sbrandon.potter@amd.comSyscallReturn 262613570Sbrandon.potter@amd.comacceptFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 262713570Sbrandon.potter@amd.com{ 262813570Sbrandon.potter@amd.com struct sockaddr sa; 262913570Sbrandon.potter@amd.com socklen_t addrLen; 263013570Sbrandon.potter@amd.com int host_fd; 263113570Sbrandon.potter@amd.com int index = 0; 263213570Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 263313570Sbrandon.potter@amd.com Addr addrPtr = p->getSyscallArg(tc, index); 263413570Sbrandon.potter@amd.com Addr lenPtr = p->getSyscallArg(tc, index); 263513570Sbrandon.potter@amd.com 263613570Sbrandon.potter@amd.com BufferArg *lenBufPtr = nullptr; 263713570Sbrandon.potter@amd.com BufferArg *addrBufPtr = nullptr; 263813570Sbrandon.potter@amd.com 263913570Sbrandon.potter@amd.com auto sfdp = std::dynamic_pointer_cast<SocketFDEntry>((*p->fds)[tgt_fd]); 264013570Sbrandon.potter@amd.com if (!sfdp) 264113570Sbrandon.potter@amd.com return -EBADF; 264213570Sbrandon.potter@amd.com int sim_fd = sfdp->getSimFD(); 264313570Sbrandon.potter@amd.com 264413570Sbrandon.potter@amd.com /** 264513570Sbrandon.potter@amd.com * We poll the socket file descriptor first to guarantee that we do not 264613570Sbrandon.potter@amd.com * block on our accept call. The socket can be opened without the 264713570Sbrandon.potter@amd.com * non-blocking flag (it blocks). This will cause deadlocks between 264813570Sbrandon.potter@amd.com * communicating processes. 264913570Sbrandon.potter@amd.com */ 265013570Sbrandon.potter@amd.com struct pollfd pfd; 265113570Sbrandon.potter@amd.com pfd.fd = sim_fd; 265213570Sbrandon.potter@amd.com pfd.events = POLLIN | POLLPRI; 265313570Sbrandon.potter@amd.com if ((poll(&pfd, 1, 0) == 0) 265413570Sbrandon.potter@amd.com && !(sfdp->getFlags() & OS::TGT_O_NONBLOCK)) 265513570Sbrandon.potter@amd.com return SyscallReturn::retry(); 265613570Sbrandon.potter@amd.com 265713570Sbrandon.potter@amd.com if (lenPtr) { 265813570Sbrandon.potter@amd.com lenBufPtr = new BufferArg(lenPtr, sizeof(socklen_t)); 265913570Sbrandon.potter@amd.com lenBufPtr->copyIn(tc->getMemProxy()); 266013570Sbrandon.potter@amd.com memcpy(&addrLen, (socklen_t *)lenBufPtr->bufferPtr(), 266113570Sbrandon.potter@amd.com sizeof(socklen_t)); 266213570Sbrandon.potter@amd.com } 266313570Sbrandon.potter@amd.com 266413570Sbrandon.potter@amd.com if (addrPtr) { 266513570Sbrandon.potter@amd.com addrBufPtr = new BufferArg(addrPtr, sizeof(struct sockaddr)); 266613570Sbrandon.potter@amd.com addrBufPtr->copyIn(tc->getMemProxy()); 266713570Sbrandon.potter@amd.com memcpy(&sa, (struct sockaddr *)addrBufPtr->bufferPtr(), 266813570Sbrandon.potter@amd.com sizeof(struct sockaddr)); 266913570Sbrandon.potter@amd.com } 267013570Sbrandon.potter@amd.com 267113570Sbrandon.potter@amd.com host_fd = accept(sim_fd, &sa, &addrLen); 267213570Sbrandon.potter@amd.com 267313570Sbrandon.potter@amd.com if (host_fd == -1) 267413570Sbrandon.potter@amd.com return -errno; 267513570Sbrandon.potter@amd.com 267613570Sbrandon.potter@amd.com if (addrPtr) { 267713570Sbrandon.potter@amd.com memcpy(addrBufPtr->bufferPtr(), &sa, sizeof(sa)); 267813570Sbrandon.potter@amd.com addrBufPtr->copyOut(tc->getMemProxy()); 267913570Sbrandon.potter@amd.com delete(addrBufPtr); 268013570Sbrandon.potter@amd.com } 268113570Sbrandon.potter@amd.com 268213570Sbrandon.potter@amd.com if (lenPtr) { 268313570Sbrandon.potter@amd.com *(socklen_t *)lenBufPtr->bufferPtr() = addrLen; 268413570Sbrandon.potter@amd.com lenBufPtr->copyOut(tc->getMemProxy()); 268513570Sbrandon.potter@amd.com delete(lenBufPtr); 268613570Sbrandon.potter@amd.com } 268713570Sbrandon.potter@amd.com 268813570Sbrandon.potter@amd.com auto afdp = std::make_shared<SocketFDEntry>(host_fd, sfdp->_domain, 268913570Sbrandon.potter@amd.com sfdp->_type, sfdp->_protocol); 269013570Sbrandon.potter@amd.com return p->fds->allocFD(afdp); 269113570Sbrandon.potter@amd.com} 269213570Sbrandon.potter@amd.com 26931354SN/A#endif // __SIM_SYSCALL_EMUL_HH__ 2694