syscall_emul.hh revision 13933
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 56360SN/A/// 57360SN/A/// @file syscall_emul.hh 58360SN/A/// 59360SN/A/// This file defines objects used to emulate syscalls from the target 60360SN/A/// application on the host machine. 61360SN/A 6213933Sbrandon.potter@amd.com#ifdef __linux__ 6313933Sbrandon.potter@amd.com#include <sys/eventfd.h> 6413933Sbrandon.potter@amd.com#include <sys/statfs.h> 6513933Sbrandon.potter@amd.com 6613933Sbrandon.potter@amd.com#endif 6713933Sbrandon.potter@amd.com 681809SN/A#ifdef __CYGWIN32__ 6911800Sbrandon.potter@amd.com#include <sys/fcntl.h> 7011392Sbrandon.potter@amd.com 711809SN/A#endif 7211392Sbrandon.potter@amd.com#include <fcntl.h> 7313902Sbrandon.potter@amd.com#include <net/if.h> 7413570Sbrandon.potter@amd.com#include <poll.h> 7513902Sbrandon.potter@amd.com#include <sys/ioctl.h> 7611383Sbrandon.potter@amd.com#include <sys/mman.h> 7713568Sbrandon.potter@amd.com#include <sys/socket.h> 783113Sgblack@eecs.umich.edu#include <sys/stat.h> 798229Snate@binkert.org#include <sys/time.h> 8013570Sbrandon.potter@amd.com#include <sys/types.h> 818229Snate@binkert.org#include <sys/uio.h> 8211594Santhony.gutierrez@amd.com#include <unistd.h> 837075Snate@binkert.org 848229Snate@binkert.org#include <cerrno> 8511856Sbrandon.potter@amd.com#include <memory> 867075Snate@binkert.org#include <string> 87360SN/A 8812461Sgabeblack@google.com#include "arch/generic/tlb.hh" 8911886Sbrandon.potter@amd.com#include "arch/utility.hh" 9011800Sbrandon.potter@amd.com#include "base/intmath.hh" 9111392Sbrandon.potter@amd.com#include "base/loader/object_file.hh" 9212334Sgabeblack@google.com#include "base/logging.hh" 931354SN/A#include "base/trace.hh" 946216Snate@binkert.org#include "base/types.hh" 956658Snate@binkert.org#include "config/the_isa.hh" 962474SN/A#include "cpu/base.hh" 972680Sktlim@umich.edu#include "cpu/thread_context.hh" 988229Snate@binkert.org#include "mem/page_table.hh" 9911886Sbrandon.potter@amd.com#include "params/Process.hh" 10010496Ssteve.reinhardt@amd.com#include "sim/emul_driver.hh" 10111911SBrandon.Potter@amd.com#include "sim/futex_map.hh" 1028229Snate@binkert.org#include "sim/process.hh" 10311794Sbrandon.potter@amd.com#include "sim/syscall_debug_macros.hh" 10411886Sbrandon.potter@amd.com#include "sim/syscall_desc.hh" 10510497Ssteve.reinhardt@amd.com#include "sim/syscall_emul_buf.hh" 10611794Sbrandon.potter@amd.com#include "sim/syscall_return.hh" 107360SN/A 10813629SAndrea.Mondelli@ucf.edu#if defined(__APPLE__) && defined(__MACH__) && !defined(CMSG_ALIGN) 10913629SAndrea.Mondelli@ucf.edu#define CMSG_ALIGN(len) (((len) + sizeof(size_t) - 1) & ~(sizeof(size_t) - 1)) 11013629SAndrea.Mondelli@ucf.edu#endif 11113629SAndrea.Mondelli@ucf.edu 112360SN/A////////////////////////////////////////////////////////////////////// 113360SN/A// 114360SN/A// The following emulation functions are generic enough that they 115360SN/A// don't need to be recompiled for different emulated OS's. They are 116360SN/A// defined in sim/syscall_emul.cc. 117360SN/A// 118360SN/A////////////////////////////////////////////////////////////////////// 119360SN/A 12013933Sbrandon.potter@amd.comvoid warnUnsupportedOS(std::string syscall_name); 121360SN/A 122378SN/A/// Handler for unimplemented syscalls that we haven't thought about. 1231706SN/ASyscallReturn unimplementedFunc(SyscallDesc *desc, int num, 12411851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 125378SN/A 126378SN/A/// Handler for unimplemented syscalls that we never intend to 127378SN/A/// implement (signal handling, etc.) and should not affect the correct 128378SN/A/// behavior of the program. Print a warning only if the appropriate 129378SN/A/// trace flag is enabled. Return success to the target program. 1301706SN/ASyscallReturn ignoreFunc(SyscallDesc *desc, int num, 13111851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 132360SN/A 13311760Sbrandon.potter@amd.com// Target fallocateFunc() handler. 13411760Sbrandon.potter@amd.comSyscallReturn fallocateFunc(SyscallDesc *desc, int num, 13511851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 13611760Sbrandon.potter@amd.com 1376109Ssanchezd@stanford.edu/// Target exit() handler: terminate current context. 1381706SN/ASyscallReturn exitFunc(SyscallDesc *desc, int num, 13911851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 140378SN/A 1416109Ssanchezd@stanford.edu/// Target exit_group() handler: terminate simulation. (exit all threads) 1426109Ssanchezd@stanford.eduSyscallReturn exitGroupFunc(SyscallDesc *desc, int num, 14311851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 1446109Ssanchezd@stanford.edu 14511886Sbrandon.potter@amd.com/// Target set_tid_address() handler. 14611886Sbrandon.potter@amd.comSyscallReturn setTidAddressFunc(SyscallDesc *desc, int num, 14711886Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 14811886Sbrandon.potter@amd.com 149378SN/A/// Target getpagesize() handler. 1501706SN/ASyscallReturn getpagesizeFunc(SyscallDesc *desc, int num, 15111851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 152378SN/A 1535748SSteve.Reinhardt@amd.com/// Target brk() handler: set brk address. 1545748SSteve.Reinhardt@amd.comSyscallReturn brkFunc(SyscallDesc *desc, int num, 15511851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 156378SN/A 157378SN/A/// Target close() handler. 1581706SN/ASyscallReturn closeFunc(SyscallDesc *desc, int num, 15911851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 160378SN/A 161378SN/A/// Target lseek() handler. 1621706SN/ASyscallReturn lseekFunc(SyscallDesc *desc, int num, 16311851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 164378SN/A 1654118Sgblack@eecs.umich.edu/// Target _llseek() handler. 1664118Sgblack@eecs.umich.eduSyscallReturn _llseekFunc(SyscallDesc *desc, int num, 16711851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 1684118Sgblack@eecs.umich.edu 169378SN/A/// Target munmap() handler. 1701706SN/ASyscallReturn munmapFunc(SyscallDesc *desc, int num, 17111851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 172378SN/A 17313568Sbrandon.potter@amd.com/// Target shutdown() handler. 17413568Sbrandon.potter@amd.comSyscallReturn shutdownFunc(SyscallDesc *desc, int num, 17513568Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 17613568Sbrandon.potter@amd.com 177378SN/A/// Target gethostname() handler. 1781706SN/ASyscallReturn gethostnameFunc(SyscallDesc *desc, int num, 17911851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 180360SN/A 1815513SMichael.Adler@intel.com/// Target getcwd() handler. 1825513SMichael.Adler@intel.comSyscallReturn getcwdFunc(SyscallDesc *desc, int num, 18311851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 1845513SMichael.Adler@intel.com 18510203SAli.Saidi@ARM.com/// Target readlink() handler. 18610203SAli.Saidi@ARM.comSyscallReturn readlinkFunc(SyscallDesc *desc, int num, 18711851Sbrandon.potter@amd.com Process *p, ThreadContext *tc, 18810203SAli.Saidi@ARM.com int index = 0); 1895513SMichael.Adler@intel.comSyscallReturn readlinkFunc(SyscallDesc *desc, int num, 19011851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 1915513SMichael.Adler@intel.com 192511SN/A/// Target unlink() handler. 19310633Smichaelupton@gmail.comSyscallReturn unlinkHelper(SyscallDesc *desc, int num, 19411851Sbrandon.potter@amd.com Process *p, ThreadContext *tc, 19510633Smichaelupton@gmail.com int index); 1961706SN/ASyscallReturn unlinkFunc(SyscallDesc *desc, int num, 19711851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 198511SN/A 19912795Smattdsinclair@gmail.com/// Target link() handler 20012795Smattdsinclair@gmail.comSyscallReturn linkFunc(SyscallDesc *desc, int num, Process *p, 20112795Smattdsinclair@gmail.com ThreadContext *tc); 20212795Smattdsinclair@gmail.com 20312796Smattdsinclair@gmail.com/// Target symlink() handler. 20412796Smattdsinclair@gmail.comSyscallReturn symlinkFunc(SyscallDesc *desc, int num, Process *p, 20512796Smattdsinclair@gmail.com ThreadContext *tc); 20612796Smattdsinclair@gmail.com 2075513SMichael.Adler@intel.com/// Target mkdir() handler. 2085513SMichael.Adler@intel.comSyscallReturn mkdirFunc(SyscallDesc *desc, int num, 20911851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2105513SMichael.Adler@intel.com 21113031Sbrandon.potter@amd.com/// Target mknod() handler. 21213031Sbrandon.potter@amd.comSyscallReturn mknodFunc(SyscallDesc *desc, int num, 21313031Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 21413031Sbrandon.potter@amd.com 21513031Sbrandon.potter@amd.com/// Target chdir() handler. 21613031Sbrandon.potter@amd.comSyscallReturn chdirFunc(SyscallDesc *desc, int num, 21713031Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 21813031Sbrandon.potter@amd.com 21913031Sbrandon.potter@amd.com// Target rmdir() handler. 22013031Sbrandon.potter@amd.comSyscallReturn rmdirFunc(SyscallDesc *desc, int num, 22113031Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 22213031Sbrandon.potter@amd.com 223511SN/A/// Target rename() handler. 2241706SN/ASyscallReturn renameFunc(SyscallDesc *desc, int num, 22511851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2261706SN/A 2271706SN/A 2281706SN/A/// Target truncate() handler. 2291706SN/ASyscallReturn truncateFunc(SyscallDesc *desc, int num, 23011851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2311706SN/A 2321706SN/A 2331706SN/A/// Target ftruncate() handler. 2341706SN/ASyscallReturn ftruncateFunc(SyscallDesc *desc, int num, 23511851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2361706SN/A 237511SN/A 2386703Svince@csl.cornell.edu/// Target truncate64() handler. 2396703Svince@csl.cornell.eduSyscallReturn truncate64Func(SyscallDesc *desc, int num, 24011851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2416703Svince@csl.cornell.edu 2426685Stjones1@inf.ed.ac.uk/// Target ftruncate64() handler. 2436685Stjones1@inf.ed.ac.ukSyscallReturn ftruncate64Func(SyscallDesc *desc, int num, 24411851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2456685Stjones1@inf.ed.ac.uk 2466685Stjones1@inf.ed.ac.uk 2475513SMichael.Adler@intel.com/// Target umask() handler. 2485513SMichael.Adler@intel.comSyscallReturn umaskFunc(SyscallDesc *desc, int num, 24911851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2505513SMichael.Adler@intel.com 25111885Sbrandon.potter@amd.com/// Target gettid() handler. 25211885Sbrandon.potter@amd.comSyscallReturn gettidFunc(SyscallDesc *desc, int num, 25311885Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2545513SMichael.Adler@intel.com 2551999SN/A/// Target chown() handler. 2561999SN/ASyscallReturn chownFunc(SyscallDesc *desc, int num, 25711851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2581999SN/A 25911885Sbrandon.potter@amd.com/// Target setpgid() handler. 26011885Sbrandon.potter@amd.comSyscallReturn setpgidFunc(SyscallDesc *desc, int num, 26111885Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2621999SN/A 2631999SN/A/// Target fchown() handler. 2641999SN/ASyscallReturn fchownFunc(SyscallDesc *desc, int num, 26511851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2661999SN/A 2673079Sstever@eecs.umich.edu/// Target dup() handler. 2683079Sstever@eecs.umich.eduSyscallReturn dupFunc(SyscallDesc *desc, int num, 26911851Sbrandon.potter@amd.com Process *process, ThreadContext *tc); 2703079Sstever@eecs.umich.edu 27111908SBrandon.Potter@amd.com/// Target dup2() handler. 27211908SBrandon.Potter@amd.comSyscallReturn dup2Func(SyscallDesc *desc, int num, 27311908SBrandon.Potter@amd.com Process *process, ThreadContext *tc); 27411908SBrandon.Potter@amd.com 27511875Sbrandon.potter@amd.com/// Target fcntl() handler. 2762093SN/ASyscallReturn fcntlFunc(SyscallDesc *desc, int num, 27711851Sbrandon.potter@amd.com Process *process, ThreadContext *tc); 2782093SN/A 2792687Sksewell@umich.edu/// Target fcntl64() handler. 2802687Sksewell@umich.eduSyscallReturn fcntl64Func(SyscallDesc *desc, int num, 28111851Sbrandon.potter@amd.com Process *process, ThreadContext *tc); 2822687Sksewell@umich.edu 2832238SN/A/// Target setuid() handler. 2842238SN/ASyscallReturn setuidFunc(SyscallDesc *desc, int num, 28511851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2862238SN/A 28711908SBrandon.Potter@amd.com/// Target pipe() handler. 28811908SBrandon.Potter@amd.comSyscallReturn pipeFunc(SyscallDesc *desc, int num, 28911908SBrandon.Potter@amd.com Process *p, ThreadContext *tc); 29011908SBrandon.Potter@amd.com 29111908SBrandon.Potter@amd.com/// Internal pipe() handler. 29211908SBrandon.Potter@amd.comSyscallReturn pipeImpl(SyscallDesc *desc, int num, Process *p, 29311908SBrandon.Potter@amd.com ThreadContext *tc, bool pseudoPipe); 29411908SBrandon.Potter@amd.com 2952238SN/A/// Target getpid() handler. 2962238SN/ASyscallReturn getpidFunc(SyscallDesc *desc, int num, 29711851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2982238SN/A 29913571Sbrandon.potter@amd.com// Target getpeername() handler. 30013571Sbrandon.potter@amd.comSyscallReturn getpeernameFunc(SyscallDesc *desc, int num, 30113571Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 30213571Sbrandon.potter@amd.com 30313568Sbrandon.potter@amd.com// Target bind() handler. 30413568Sbrandon.potter@amd.comSyscallReturn bindFunc(SyscallDesc *desc, int num, 30513568Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 30613568Sbrandon.potter@amd.com 30713568Sbrandon.potter@amd.com// Target listen() handler. 30813568Sbrandon.potter@amd.comSyscallReturn listenFunc(SyscallDesc *desc, int num, 30913568Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 31013568Sbrandon.potter@amd.com 31113568Sbrandon.potter@amd.com// Target connect() handler. 31213568Sbrandon.potter@amd.comSyscallReturn connectFunc(SyscallDesc *desc, int num, 31313568Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 31413568Sbrandon.potter@amd.com 31513448Sciro.santilli@arm.com#if defined(SYS_getdents) 31613031Sbrandon.potter@amd.com// Target getdents() handler. 31713031Sbrandon.potter@amd.comSyscallReturn getdentsFunc(SyscallDesc *desc, int num, 31813031Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 31913448Sciro.santilli@arm.com#endif 32013031Sbrandon.potter@amd.com 32113539Sjavier.setoain@arm.com#if defined(SYS_getdents64) 32213539Sjavier.setoain@arm.com// Target getdents() handler. 32313539Sjavier.setoain@arm.comSyscallReturn getdents64Func(SyscallDesc *desc, int num, 32413539Sjavier.setoain@arm.com Process *p, ThreadContext *tc); 32513539Sjavier.setoain@arm.com#endif 32613539Sjavier.setoain@arm.com 32713569Sbrandon.potter@amd.com// Target sendto() handler. 32813569Sbrandon.potter@amd.comSyscallReturn sendtoFunc(SyscallDesc *desc, int num, 32913569Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 33013569Sbrandon.potter@amd.com 33113569Sbrandon.potter@amd.com// Target recvfrom() handler. 33213569Sbrandon.potter@amd.comSyscallReturn recvfromFunc(SyscallDesc *desc, int num, 33313569Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 33413569Sbrandon.potter@amd.com 33513569Sbrandon.potter@amd.com// Target recvmsg() handler. 33613569Sbrandon.potter@amd.comSyscallReturn recvmsgFunc(SyscallDesc *desc, int num, 33713569Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 33813569Sbrandon.potter@amd.com 33913569Sbrandon.potter@amd.com// Target sendmsg() handler. 34013569Sbrandon.potter@amd.comSyscallReturn sendmsgFunc(SyscallDesc *desc, int num, 34113569Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 34213569Sbrandon.potter@amd.com 34313031Sbrandon.potter@amd.com// Target getuid() handler. 3442238SN/ASyscallReturn getuidFunc(SyscallDesc *desc, int num, 34511851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3462238SN/A 3472238SN/A/// Target getgid() handler. 3482238SN/ASyscallReturn getgidFunc(SyscallDesc *desc, int num, 34911851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3502238SN/A 3512238SN/A/// Target getppid() handler. 3522238SN/ASyscallReturn getppidFunc(SyscallDesc *desc, int num, 35311851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3542238SN/A 3552238SN/A/// Target geteuid() handler. 3562238SN/ASyscallReturn geteuidFunc(SyscallDesc *desc, int num, 35711851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3582238SN/A 3592238SN/A/// Target getegid() handler. 3602238SN/ASyscallReturn getegidFunc(SyscallDesc *desc, int num, 36111851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3622238SN/A 3639455Smitch.hayenga+gem5@gmail.com/// Target access() handler 3649455Smitch.hayenga+gem5@gmail.comSyscallReturn accessFunc(SyscallDesc *desc, int num, 36511851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 36610203SAli.Saidi@ARM.comSyscallReturn accessFunc(SyscallDesc *desc, int num, 36711851Sbrandon.potter@amd.com Process *p, ThreadContext *tc, 36811851Sbrandon.potter@amd.com int index); 3699455Smitch.hayenga+gem5@gmail.com 37013571Sbrandon.potter@amd.com// Target getsockopt() handler. 37113571Sbrandon.potter@amd.comSyscallReturn getsockoptFunc(SyscallDesc *desc, int num, 37213571Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 37313571Sbrandon.potter@amd.com 37413571Sbrandon.potter@amd.com// Target setsockopt() handler. 37513571Sbrandon.potter@amd.comSyscallReturn setsockoptFunc(SyscallDesc *desc, int num, 37613571Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 37713571Sbrandon.potter@amd.com 37813571Sbrandon.potter@amd.com// Target getsockname() handler. 37913571Sbrandon.potter@amd.comSyscallReturn getsocknameFunc(SyscallDesc *desc, int num, 38013571Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 38113571Sbrandon.potter@amd.com 3829112Smarc.orr@gmail.com/// Futex system call 38311906SBrandon.Potter@amd.com/// Implemented by Daniel Sanchez 38411906SBrandon.Potter@amd.com/// Used by printf's in multi-threaded apps 3859112Smarc.orr@gmail.comtemplate <class OS> 3869112Smarc.orr@gmail.comSyscallReturn 38711851Sbrandon.potter@amd.comfutexFunc(SyscallDesc *desc, int callnum, Process *process, 3889112Smarc.orr@gmail.com ThreadContext *tc) 3899112Smarc.orr@gmail.com{ 39011911SBrandon.Potter@amd.com using namespace std; 3919112Smarc.orr@gmail.com 39211911SBrandon.Potter@amd.com int index = 0; 39311911SBrandon.Potter@amd.com Addr uaddr = process->getSyscallArg(tc, index); 39411911SBrandon.Potter@amd.com int op = process->getSyscallArg(tc, index); 39511911SBrandon.Potter@amd.com int val = process->getSyscallArg(tc, index); 39613642Sqtt2@cornell.edu int timeout M5_VAR_USED = process->getSyscallArg(tc, index); 39713642Sqtt2@cornell.edu Addr uaddr2 M5_VAR_USED = process->getSyscallArg(tc, index); 39813642Sqtt2@cornell.edu int val3 = process->getSyscallArg(tc, index); 3999112Smarc.orr@gmail.com 40011911SBrandon.Potter@amd.com /* 40111911SBrandon.Potter@amd.com * Unsupported option that does not affect the correctness of the 40211911SBrandon.Potter@amd.com * application. This is a performance optimization utilized by Linux. 40311911SBrandon.Potter@amd.com */ 4049238Slluc.alvarez@bsc.es op &= ~OS::TGT_FUTEX_PRIVATE_FLAG; 40513642Sqtt2@cornell.edu op &= ~OS::TGT_FUTEX_CLOCK_REALTIME_FLAG; 4069112Smarc.orr@gmail.com 40711911SBrandon.Potter@amd.com FutexMap &futex_map = tc->getSystemPtr()->futexMap; 4089112Smarc.orr@gmail.com 40913642Sqtt2@cornell.edu if (OS::TGT_FUTEX_WAIT == op || OS::TGT_FUTEX_WAIT_BITSET == op) { 41011911SBrandon.Potter@amd.com // Ensure futex system call accessed atomically. 41111911SBrandon.Potter@amd.com BufferArg buf(uaddr, sizeof(int)); 41211911SBrandon.Potter@amd.com buf.copyIn(tc->getMemProxy()); 41311911SBrandon.Potter@amd.com int mem_val = *(int*)buf.bufferPtr(); 4149112Smarc.orr@gmail.com 41511911SBrandon.Potter@amd.com /* 41611911SBrandon.Potter@amd.com * The value in memory at uaddr is not equal with the expected val 41711911SBrandon.Potter@amd.com * (a different thread must have changed it before the system call was 41811911SBrandon.Potter@amd.com * invoked). In this case, we need to throw an error. 41911911SBrandon.Potter@amd.com */ 42011911SBrandon.Potter@amd.com if (val != mem_val) 4219112Smarc.orr@gmail.com return -OS::TGT_EWOULDBLOCK; 4229112Smarc.orr@gmail.com 42313642Sqtt2@cornell.edu if (OS::TGT_FUTEX_WAIT) { 42413642Sqtt2@cornell.edu futex_map.suspend(uaddr, process->tgid(), tc); 42513642Sqtt2@cornell.edu } else { 42613642Sqtt2@cornell.edu futex_map.suspend_bitset(uaddr, process->tgid(), tc, val3); 42713642Sqtt2@cornell.edu } 42811911SBrandon.Potter@amd.com 4299112Smarc.orr@gmail.com return 0; 43011911SBrandon.Potter@amd.com } else if (OS::TGT_FUTEX_WAKE == op) { 43111911SBrandon.Potter@amd.com return futex_map.wakeup(uaddr, process->tgid(), val); 43213642Sqtt2@cornell.edu } else if (OS::TGT_FUTEX_WAKE_BITSET == op) { 43313642Sqtt2@cornell.edu return futex_map.wakeup_bitset(uaddr, process->tgid(), val3); 43413650Smw828@cornell.edu } else if (OS::TGT_FUTEX_REQUEUE == op || 43513650Smw828@cornell.edu OS::TGT_FUTEX_CMP_REQUEUE == op) { 43613650Smw828@cornell.edu 43713650Smw828@cornell.edu // Ensure futex system call accessed atomically. 43813650Smw828@cornell.edu BufferArg buf(uaddr, sizeof(int)); 43913650Smw828@cornell.edu buf.copyIn(tc->getMemProxy()); 44013650Smw828@cornell.edu int mem_val = *(int*)buf.bufferPtr(); 44113650Smw828@cornell.edu /* 44213650Smw828@cornell.edu * For CMP_REQUEUE, the whole operation is only started only if 44313650Smw828@cornell.edu * val3 is still the value of the futex pointed to by uaddr. 44413650Smw828@cornell.edu */ 44513650Smw828@cornell.edu if (OS::TGT_FUTEX_CMP_REQUEUE && val3 != mem_val) 44613650Smw828@cornell.edu return -OS::TGT_EWOULDBLOCK; 44713650Smw828@cornell.edu return futex_map.requeue(uaddr, process->tgid(), val, timeout, uaddr2); 44813651Smw828@cornell.edu } else if (OS::TGT_FUTEX_WAKE_OP == op) { 44913651Smw828@cornell.edu /* 45013651Smw828@cornell.edu * The FUTEX_WAKE_OP operation is equivalent to executing the 45113651Smw828@cornell.edu * following code atomically and totally ordered with respect to 45213651Smw828@cornell.edu * other futex operations on any of the two supplied futex words: 45313651Smw828@cornell.edu * 45413651Smw828@cornell.edu * int oldval = *(int *) addr2; 45513651Smw828@cornell.edu * *(int *) addr2 = oldval op oparg; 45613651Smw828@cornell.edu * futex(addr1, FUTEX_WAKE, val, 0, 0, 0); 45713651Smw828@cornell.edu * if (oldval cmp cmparg) 45813651Smw828@cornell.edu * futex(addr2, FUTEX_WAKE, val2, 0, 0, 0); 45913651Smw828@cornell.edu * 46013651Smw828@cornell.edu * (op, oparg, cmp, cmparg are encoded in val3) 46113651Smw828@cornell.edu * 46213651Smw828@cornell.edu * +---+---+-----------+-----------+ 46313651Smw828@cornell.edu * |op |cmp| oparg | cmparg | 46413651Smw828@cornell.edu * +---+---+-----------+-----------+ 46513651Smw828@cornell.edu * 4 4 12 12 <== # of bits 46613651Smw828@cornell.edu * 46713651Smw828@cornell.edu * reference: http://man7.org/linux/man-pages/man2/futex.2.html 46813651Smw828@cornell.edu * 46913651Smw828@cornell.edu */ 47013651Smw828@cornell.edu // get value from simulated-space 47113651Smw828@cornell.edu BufferArg buf(uaddr2, sizeof(int)); 47213651Smw828@cornell.edu buf.copyIn(tc->getMemProxy()); 47313651Smw828@cornell.edu int oldval = *(int*)buf.bufferPtr(); 47413651Smw828@cornell.edu int newval = oldval; 47513651Smw828@cornell.edu // extract op, oparg, cmp, cmparg from val3 47613651Smw828@cornell.edu int wake_cmparg = val3 & 0xfff; 47713651Smw828@cornell.edu int wake_oparg = (val3 & 0xfff000) >> 12; 47813651Smw828@cornell.edu int wake_cmp = (val3 & 0xf000000) >> 24; 47913651Smw828@cornell.edu int wake_op = (val3 & 0xf0000000) >> 28; 48013651Smw828@cornell.edu if ((wake_op & OS::TGT_FUTEX_OP_ARG_SHIFT) >> 3 == 1) 48113651Smw828@cornell.edu wake_oparg = (1 << wake_oparg); 48213651Smw828@cornell.edu wake_op &= ~OS::TGT_FUTEX_OP_ARG_SHIFT; 48313651Smw828@cornell.edu // perform operation on the value of the second futex 48413651Smw828@cornell.edu if (wake_op == OS::TGT_FUTEX_OP_SET) 48513651Smw828@cornell.edu newval = wake_oparg; 48613651Smw828@cornell.edu else if (wake_op == OS::TGT_FUTEX_OP_ADD) 48713651Smw828@cornell.edu newval += wake_oparg; 48813651Smw828@cornell.edu else if (wake_op == OS::TGT_FUTEX_OP_OR) 48913651Smw828@cornell.edu newval |= wake_oparg; 49013651Smw828@cornell.edu else if (wake_op == OS::TGT_FUTEX_OP_ANDN) 49113651Smw828@cornell.edu newval &= ~wake_oparg; 49213651Smw828@cornell.edu else if (wake_op == OS::TGT_FUTEX_OP_XOR) 49313651Smw828@cornell.edu newval ^= wake_oparg; 49413651Smw828@cornell.edu // copy updated value back to simulated-space 49513651Smw828@cornell.edu *(int*)buf.bufferPtr() = newval; 49613651Smw828@cornell.edu buf.copyOut(tc->getMemProxy()); 49713651Smw828@cornell.edu // perform the first wake-up 49813651Smw828@cornell.edu int woken1 = futex_map.wakeup(uaddr, process->tgid(), val); 49913651Smw828@cornell.edu int woken2 = 0; 50013651Smw828@cornell.edu // calculate the condition of the second wake-up 50113651Smw828@cornell.edu bool is_wake2 = false; 50213651Smw828@cornell.edu if (wake_cmp == OS::TGT_FUTEX_OP_CMP_EQ) 50313651Smw828@cornell.edu is_wake2 = oldval == wake_cmparg; 50413651Smw828@cornell.edu else if (wake_cmp == OS::TGT_FUTEX_OP_CMP_NE) 50513651Smw828@cornell.edu is_wake2 = oldval != wake_cmparg; 50613651Smw828@cornell.edu else if (wake_cmp == OS::TGT_FUTEX_OP_CMP_LT) 50713651Smw828@cornell.edu is_wake2 = oldval < wake_cmparg; 50813651Smw828@cornell.edu else if (wake_cmp == OS::TGT_FUTEX_OP_CMP_LE) 50913651Smw828@cornell.edu is_wake2 = oldval <= wake_cmparg; 51013651Smw828@cornell.edu else if (wake_cmp == OS::TGT_FUTEX_OP_CMP_GT) 51113651Smw828@cornell.edu is_wake2 = oldval > wake_cmparg; 51213651Smw828@cornell.edu else if (wake_cmp == OS::TGT_FUTEX_OP_CMP_GE) 51313651Smw828@cornell.edu is_wake2 = oldval >= wake_cmparg; 51413651Smw828@cornell.edu // perform the second wake-up 51513651Smw828@cornell.edu if (is_wake2) 51613651Smw828@cornell.edu woken2 = futex_map.wakeup(uaddr2, process->tgid(), timeout); 51713651Smw828@cornell.edu 51813651Smw828@cornell.edu return woken1 + woken2; 5199112Smarc.orr@gmail.com } 52011911SBrandon.Potter@amd.com warn("futex: op %d not implemented; ignoring.", op); 52111911SBrandon.Potter@amd.com return -ENOSYS; 5229112Smarc.orr@gmail.com} 5239112Smarc.orr@gmail.com 5242238SN/A 5252238SN/A/// Pseudo Funcs - These functions use a different return convension, 5262238SN/A/// returning a second value in a register other than the normal return register 5272238SN/ASyscallReturn pipePseudoFunc(SyscallDesc *desc, int num, 52811851Sbrandon.potter@amd.com Process *process, ThreadContext *tc); 5292238SN/A 5302238SN/A/// Target getpidPseudo() handler. 5312238SN/ASyscallReturn getpidPseudoFunc(SyscallDesc *desc, int num, 53211851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 5332238SN/A 5342238SN/A/// Target getuidPseudo() handler. 5352238SN/ASyscallReturn getuidPseudoFunc(SyscallDesc *desc, int num, 53611851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 5372238SN/A 5382238SN/A/// Target getgidPseudo() handler. 5392238SN/ASyscallReturn getgidPseudoFunc(SyscallDesc *desc, int num, 54011851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 5412238SN/A 5422238SN/A 5431354SN/A/// A readable name for 1,000,000, for converting microseconds to seconds. 5441354SN/Aconst int one_million = 1000000; 54510796Sbrandon.potter@amd.com/// A readable name for 1,000,000,000, for converting nanoseconds to seconds. 54610796Sbrandon.potter@amd.comconst int one_billion = 1000000000; 5471354SN/A 5481354SN/A/// Approximate seconds since the epoch (1/1/1970). About a billion, 5491354SN/A/// by my reckoning. We want to keep this a constant (not use the 5501354SN/A/// real-world time) to keep simulations repeatable. 5511354SN/Aconst unsigned seconds_since_epoch = 1000000000; 5521354SN/A 5531354SN/A/// Helper function to convert current elapsed time to seconds and 5541354SN/A/// microseconds. 5551354SN/Atemplate <class T1, class T2> 5561354SN/Avoid 55710796Sbrandon.potter@amd.comgetElapsedTimeMicro(T1 &sec, T2 &usec) 5581354SN/A{ 55910796Sbrandon.potter@amd.com uint64_t elapsed_usecs = curTick() / SimClock::Int::us; 5601354SN/A sec = elapsed_usecs / one_million; 5611354SN/A usec = elapsed_usecs % one_million; 5621354SN/A} 5631354SN/A 56410796Sbrandon.potter@amd.com/// Helper function to convert current elapsed time to seconds and 56510796Sbrandon.potter@amd.com/// nanoseconds. 56610796Sbrandon.potter@amd.comtemplate <class T1, class T2> 56710796Sbrandon.potter@amd.comvoid 56810796Sbrandon.potter@amd.comgetElapsedTimeNano(T1 &sec, T2 &nsec) 56910796Sbrandon.potter@amd.com{ 57010796Sbrandon.potter@amd.com uint64_t elapsed_nsecs = curTick() / SimClock::Int::ns; 57110796Sbrandon.potter@amd.com sec = elapsed_nsecs / one_billion; 57210796Sbrandon.potter@amd.com nsec = elapsed_nsecs % one_billion; 57310796Sbrandon.potter@amd.com} 57410796Sbrandon.potter@amd.com 575360SN/A////////////////////////////////////////////////////////////////////// 576360SN/A// 577360SN/A// The following emulation functions are generic, but need to be 578360SN/A// templated to account for differences in types, constants, etc. 579360SN/A// 580360SN/A////////////////////////////////////////////////////////////////////// 581360SN/A 58211759Sbrandon.potter@amd.com typedef struct statfs hst_statfs; 5833113Sgblack@eecs.umich.edu#if NO_STAT64 5843113Sgblack@eecs.umich.edu typedef struct stat hst_stat; 5853113Sgblack@eecs.umich.edu typedef struct stat hst_stat64; 5863113Sgblack@eecs.umich.edu#else 5873113Sgblack@eecs.umich.edu typedef struct stat hst_stat; 5883113Sgblack@eecs.umich.edu typedef struct stat64 hst_stat64; 5893113Sgblack@eecs.umich.edu#endif 5903113Sgblack@eecs.umich.edu 5913113Sgblack@eecs.umich.edu//// Helper function to convert a host stat buffer to a target stat 5923113Sgblack@eecs.umich.edu//// buffer. Also copies the target buffer out to the simulated 5933113Sgblack@eecs.umich.edu//// memory space. Used by stat(), fstat(), and lstat(). 5943113Sgblack@eecs.umich.edu 5953113Sgblack@eecs.umich.edutemplate <typename target_stat, typename host_stat> 59612032Sandreas.sandberg@arm.comvoid 5973113Sgblack@eecs.umich.educonvertStatBuf(target_stat &tgt, host_stat *host, bool fakeTTY = false) 5983113Sgblack@eecs.umich.edu{ 5994189Sgblack@eecs.umich.edu using namespace TheISA; 6004189Sgblack@eecs.umich.edu 6013113Sgblack@eecs.umich.edu if (fakeTTY) 6023113Sgblack@eecs.umich.edu tgt->st_dev = 0xA; 6033113Sgblack@eecs.umich.edu else 6043113Sgblack@eecs.umich.edu tgt->st_dev = host->st_dev; 6058737Skoansin.tan@gmail.com tgt->st_dev = TheISA::htog(tgt->st_dev); 6063113Sgblack@eecs.umich.edu tgt->st_ino = host->st_ino; 6078737Skoansin.tan@gmail.com tgt->st_ino = TheISA::htog(tgt->st_ino); 6083277Sgblack@eecs.umich.edu tgt->st_mode = host->st_mode; 6095515SMichael.Adler@intel.com if (fakeTTY) { 6105515SMichael.Adler@intel.com // Claim to be a character device 6115515SMichael.Adler@intel.com tgt->st_mode &= ~S_IFMT; // Clear S_IFMT 6125515SMichael.Adler@intel.com tgt->st_mode |= S_IFCHR; // Set S_IFCHR 6135515SMichael.Adler@intel.com } 6148737Skoansin.tan@gmail.com tgt->st_mode = TheISA::htog(tgt->st_mode); 6153277Sgblack@eecs.umich.edu tgt->st_nlink = host->st_nlink; 6168737Skoansin.tan@gmail.com tgt->st_nlink = TheISA::htog(tgt->st_nlink); 6173277Sgblack@eecs.umich.edu tgt->st_uid = host->st_uid; 6188737Skoansin.tan@gmail.com tgt->st_uid = TheISA::htog(tgt->st_uid); 6193277Sgblack@eecs.umich.edu tgt->st_gid = host->st_gid; 6208737Skoansin.tan@gmail.com tgt->st_gid = TheISA::htog(tgt->st_gid); 6213113Sgblack@eecs.umich.edu if (fakeTTY) 6223113Sgblack@eecs.umich.edu tgt->st_rdev = 0x880d; 6233113Sgblack@eecs.umich.edu else 6243113Sgblack@eecs.umich.edu tgt->st_rdev = host->st_rdev; 6258737Skoansin.tan@gmail.com tgt->st_rdev = TheISA::htog(tgt->st_rdev); 6263113Sgblack@eecs.umich.edu tgt->st_size = host->st_size; 6278737Skoansin.tan@gmail.com tgt->st_size = TheISA::htog(tgt->st_size); 6283114Sgblack@eecs.umich.edu tgt->st_atimeX = host->st_atime; 6298737Skoansin.tan@gmail.com tgt->st_atimeX = TheISA::htog(tgt->st_atimeX); 6303114Sgblack@eecs.umich.edu tgt->st_mtimeX = host->st_mtime; 6318737Skoansin.tan@gmail.com tgt->st_mtimeX = TheISA::htog(tgt->st_mtimeX); 6323114Sgblack@eecs.umich.edu tgt->st_ctimeX = host->st_ctime; 6338737Skoansin.tan@gmail.com tgt->st_ctimeX = TheISA::htog(tgt->st_ctimeX); 63411906SBrandon.Potter@amd.com // Force the block size to be 8KB. This helps to ensure buffered io works 6354061Sgblack@eecs.umich.edu // consistently across different hosts. 6364061Sgblack@eecs.umich.edu tgt->st_blksize = 0x2000; 6378737Skoansin.tan@gmail.com tgt->st_blksize = TheISA::htog(tgt->st_blksize); 6383113Sgblack@eecs.umich.edu tgt->st_blocks = host->st_blocks; 6398737Skoansin.tan@gmail.com tgt->st_blocks = TheISA::htog(tgt->st_blocks); 6403113Sgblack@eecs.umich.edu} 6413113Sgblack@eecs.umich.edu 6423113Sgblack@eecs.umich.edu// Same for stat64 6433113Sgblack@eecs.umich.edu 6443113Sgblack@eecs.umich.edutemplate <typename target_stat, typename host_stat64> 64512032Sandreas.sandberg@arm.comvoid 6463113Sgblack@eecs.umich.educonvertStat64Buf(target_stat &tgt, host_stat64 *host, bool fakeTTY = false) 6473113Sgblack@eecs.umich.edu{ 6484189Sgblack@eecs.umich.edu using namespace TheISA; 6494189Sgblack@eecs.umich.edu 6503113Sgblack@eecs.umich.edu convertStatBuf<target_stat, host_stat64>(tgt, host, fakeTTY); 6513113Sgblack@eecs.umich.edu#if defined(STAT_HAVE_NSEC) 6523113Sgblack@eecs.umich.edu tgt->st_atime_nsec = host->st_atime_nsec; 6538737Skoansin.tan@gmail.com tgt->st_atime_nsec = TheISA::htog(tgt->st_atime_nsec); 6543113Sgblack@eecs.umich.edu tgt->st_mtime_nsec = host->st_mtime_nsec; 6558737Skoansin.tan@gmail.com tgt->st_mtime_nsec = TheISA::htog(tgt->st_mtime_nsec); 6563113Sgblack@eecs.umich.edu tgt->st_ctime_nsec = host->st_ctime_nsec; 6578737Skoansin.tan@gmail.com tgt->st_ctime_nsec = TheISA::htog(tgt->st_ctime_nsec); 6583113Sgblack@eecs.umich.edu#else 6593113Sgblack@eecs.umich.edu tgt->st_atime_nsec = 0; 6603113Sgblack@eecs.umich.edu tgt->st_mtime_nsec = 0; 6613113Sgblack@eecs.umich.edu tgt->st_ctime_nsec = 0; 6623113Sgblack@eecs.umich.edu#endif 6633113Sgblack@eecs.umich.edu} 6643113Sgblack@eecs.umich.edu 66511906SBrandon.Potter@amd.com// Here are a couple of convenience functions 6663113Sgblack@eecs.umich.edutemplate<class OS> 66712032Sandreas.sandberg@arm.comvoid 6688852Sandreas.hansson@arm.comcopyOutStatBuf(SETranslatingPortProxy &mem, Addr addr, 66911906SBrandon.Potter@amd.com hst_stat *host, bool fakeTTY = false) 6703113Sgblack@eecs.umich.edu{ 6713113Sgblack@eecs.umich.edu typedef TypedBufferArg<typename OS::tgt_stat> tgt_stat_buf; 6723113Sgblack@eecs.umich.edu tgt_stat_buf tgt(addr); 6733113Sgblack@eecs.umich.edu convertStatBuf<tgt_stat_buf, hst_stat>(tgt, host, fakeTTY); 6743113Sgblack@eecs.umich.edu tgt.copyOut(mem); 6753113Sgblack@eecs.umich.edu} 6763113Sgblack@eecs.umich.edu 6773113Sgblack@eecs.umich.edutemplate<class OS> 67812032Sandreas.sandberg@arm.comvoid 6798852Sandreas.hansson@arm.comcopyOutStat64Buf(SETranslatingPortProxy &mem, Addr addr, 68011906SBrandon.Potter@amd.com hst_stat64 *host, bool fakeTTY = false) 6813113Sgblack@eecs.umich.edu{ 6823113Sgblack@eecs.umich.edu typedef TypedBufferArg<typename OS::tgt_stat64> tgt_stat_buf; 6833113Sgblack@eecs.umich.edu tgt_stat_buf tgt(addr); 6846686Stjones1@inf.ed.ac.uk convertStat64Buf<tgt_stat_buf, hst_stat64>(tgt, host, fakeTTY); 6853113Sgblack@eecs.umich.edu tgt.copyOut(mem); 6863113Sgblack@eecs.umich.edu} 6873113Sgblack@eecs.umich.edu 68811759Sbrandon.potter@amd.comtemplate <class OS> 68912032Sandreas.sandberg@arm.comvoid 69011759Sbrandon.potter@amd.comcopyOutStatfsBuf(SETranslatingPortProxy &mem, Addr addr, 69111759Sbrandon.potter@amd.com hst_statfs *host) 69211759Sbrandon.potter@amd.com{ 69311759Sbrandon.potter@amd.com TypedBufferArg<typename OS::tgt_statfs> tgt(addr); 69411759Sbrandon.potter@amd.com 69511812Sbaz21@cam.ac.uk tgt->f_type = TheISA::htog(host->f_type); 69611812Sbaz21@cam.ac.uk#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) 69711812Sbaz21@cam.ac.uk tgt->f_bsize = TheISA::htog(host->f_iosize); 69811759Sbrandon.potter@amd.com#else 69911812Sbaz21@cam.ac.uk tgt->f_bsize = TheISA::htog(host->f_bsize); 70011759Sbrandon.potter@amd.com#endif 70111759Sbrandon.potter@amd.com tgt->f_blocks = TheISA::htog(host->f_blocks); 70211759Sbrandon.potter@amd.com tgt->f_bfree = TheISA::htog(host->f_bfree); 70311759Sbrandon.potter@amd.com tgt->f_bavail = TheISA::htog(host->f_bavail); 70411759Sbrandon.potter@amd.com tgt->f_files = TheISA::htog(host->f_files); 70511759Sbrandon.potter@amd.com tgt->f_ffree = TheISA::htog(host->f_ffree); 70611759Sbrandon.potter@amd.com memcpy(&tgt->f_fsid, &host->f_fsid, sizeof(host->f_fsid)); 70711812Sbaz21@cam.ac.uk#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) 70811812Sbaz21@cam.ac.uk tgt->f_namelen = TheISA::htog(host->f_namemax); 70911812Sbaz21@cam.ac.uk tgt->f_frsize = TheISA::htog(host->f_bsize); 71011812Sbaz21@cam.ac.uk#elif defined(__APPLE__) 71111812Sbaz21@cam.ac.uk tgt->f_namelen = 0; 71211812Sbaz21@cam.ac.uk tgt->f_frsize = 0; 71311812Sbaz21@cam.ac.uk#else 71411759Sbrandon.potter@amd.com tgt->f_namelen = TheISA::htog(host->f_namelen); 71511759Sbrandon.potter@amd.com tgt->f_frsize = TheISA::htog(host->f_frsize); 71611812Sbaz21@cam.ac.uk#endif 71711812Sbaz21@cam.ac.uk#if defined(__linux__) 71811759Sbrandon.potter@amd.com memcpy(&tgt->f_spare, &host->f_spare, sizeof(host->f_spare)); 71911812Sbaz21@cam.ac.uk#else 72011812Sbaz21@cam.ac.uk /* 72111812Sbaz21@cam.ac.uk * The fields are different sizes per OS. Don't bother with 72211812Sbaz21@cam.ac.uk * f_spare or f_reserved on non-Linux for now. 72311812Sbaz21@cam.ac.uk */ 72411812Sbaz21@cam.ac.uk memset(&tgt->f_spare, 0, sizeof(tgt->f_spare)); 72511812Sbaz21@cam.ac.uk#endif 72611759Sbrandon.potter@amd.com 72711759Sbrandon.potter@amd.com tgt.copyOut(mem); 72811759Sbrandon.potter@amd.com} 72911759Sbrandon.potter@amd.com 730378SN/A/// Target ioctl() handler. For the most part, programs call ioctl() 731378SN/A/// only to find out if their stdout is a tty, to determine whether to 7329141Smarc.orr@gmail.com/// do line or block buffering. We always claim that output fds are 7339141Smarc.orr@gmail.com/// not TTYs to provide repeatable results. 734360SN/Atemplate <class OS> 7351450SN/ASyscallReturn 73611856Sbrandon.potter@amd.comioctlFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 737360SN/A{ 7386701Sgblack@eecs.umich.edu int index = 0; 73911856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 74011856Sbrandon.potter@amd.com unsigned req = p->getSyscallArg(tc, index); 741360SN/A 74213907Salexandru.dutu@amd.com DPRINTF_SYSCALL(Verbose, "ioctl(%d, 0x%x, ...)\n", tgt_fd, req); 743360SN/A 74411856Sbrandon.potter@amd.com if (OS::isTtyReq(req)) 74511856Sbrandon.potter@amd.com return -ENOTTY; 74610496Ssteve.reinhardt@amd.com 74711856Sbrandon.potter@amd.com auto dfdp = std::dynamic_pointer_cast<DeviceFDEntry>((*p->fds)[tgt_fd]); 74813902Sbrandon.potter@amd.com if (dfdp) { 74913902Sbrandon.potter@amd.com EmulatedDriver *emul_driver = dfdp->getDriver(); 75013902Sbrandon.potter@amd.com if (emul_driver) 75113902Sbrandon.potter@amd.com return emul_driver->ioctl(p, tc, req); 75213902Sbrandon.potter@amd.com } 75313902Sbrandon.potter@amd.com 75413902Sbrandon.potter@amd.com auto sfdp = std::dynamic_pointer_cast<SocketFDEntry>((*p->fds)[tgt_fd]); 75513902Sbrandon.potter@amd.com if (sfdp) { 75613902Sbrandon.potter@amd.com int status; 75713902Sbrandon.potter@amd.com 75813902Sbrandon.potter@amd.com switch (req) { 75913902Sbrandon.potter@amd.com case SIOCGIFCONF: { 76013902Sbrandon.potter@amd.com Addr conf_addr = p->getSyscallArg(tc, index); 76113902Sbrandon.potter@amd.com BufferArg conf_arg(conf_addr, sizeof(ifconf)); 76213902Sbrandon.potter@amd.com conf_arg.copyIn(tc->getMemProxy()); 76313902Sbrandon.potter@amd.com 76413902Sbrandon.potter@amd.com ifconf *conf = (ifconf*)conf_arg.bufferPtr(); 76513902Sbrandon.potter@amd.com Addr ifc_buf_addr = (Addr)conf->ifc_buf; 76613902Sbrandon.potter@amd.com BufferArg ifc_buf_arg(ifc_buf_addr, conf->ifc_len); 76713902Sbrandon.potter@amd.com ifc_buf_arg.copyIn(tc->getMemProxy()); 76813902Sbrandon.potter@amd.com 76913902Sbrandon.potter@amd.com conf->ifc_buf = (char*)ifc_buf_arg.bufferPtr(); 77013902Sbrandon.potter@amd.com 77113902Sbrandon.potter@amd.com status = ioctl(sfdp->getSimFD(), req, conf_arg.bufferPtr()); 77213902Sbrandon.potter@amd.com if (status != -1) { 77313902Sbrandon.potter@amd.com conf->ifc_buf = (char*)ifc_buf_addr; 77413902Sbrandon.potter@amd.com ifc_buf_arg.copyOut(tc->getMemProxy()); 77513902Sbrandon.potter@amd.com conf_arg.copyOut(tc->getMemProxy()); 77613902Sbrandon.potter@amd.com } 77713902Sbrandon.potter@amd.com 77813902Sbrandon.potter@amd.com return status; 77913902Sbrandon.potter@amd.com } 78013902Sbrandon.potter@amd.com case SIOCGIFFLAGS: 78113902Sbrandon.potter@amd.com#ifdef __linux__ 78213902Sbrandon.potter@amd.com case SIOCGIFINDEX: 78313902Sbrandon.potter@amd.com#endif 78413902Sbrandon.potter@amd.com case SIOCGIFNETMASK: 78513902Sbrandon.potter@amd.com case SIOCGIFADDR: 78613902Sbrandon.potter@amd.com#ifdef __linux__ 78713902Sbrandon.potter@amd.com case SIOCGIFHWADDR: 78813902Sbrandon.potter@amd.com#endif 78913902Sbrandon.potter@amd.com case SIOCGIFMTU: { 79013902Sbrandon.potter@amd.com Addr req_addr = p->getSyscallArg(tc, index); 79113902Sbrandon.potter@amd.com BufferArg req_arg(req_addr, sizeof(ifreq)); 79213902Sbrandon.potter@amd.com req_arg.copyIn(tc->getMemProxy()); 79313902Sbrandon.potter@amd.com 79413902Sbrandon.potter@amd.com status = ioctl(sfdp->getSimFD(), req, req_arg.bufferPtr()); 79513902Sbrandon.potter@amd.com if (status != -1) 79613902Sbrandon.potter@amd.com req_arg.copyOut(tc->getMemProxy()); 79713902Sbrandon.potter@amd.com return status; 79813902Sbrandon.potter@amd.com } 79913902Sbrandon.potter@amd.com } 80013902Sbrandon.potter@amd.com } 80110496Ssteve.reinhardt@amd.com 80211856Sbrandon.potter@amd.com /** 80311856Sbrandon.potter@amd.com * For lack of a better return code, return ENOTTY. Ideally, we should 80411856Sbrandon.potter@amd.com * return something better here, but at least we issue the warning. 80511856Sbrandon.potter@amd.com */ 80611856Sbrandon.potter@amd.com warn("Unsupported ioctl call (return ENOTTY): ioctl(%d, 0x%x, ...) @ \n", 80710930Sbrandon.potter@amd.com tgt_fd, req, tc->pcState()); 8089141Smarc.orr@gmail.com return -ENOTTY; 809360SN/A} 810360SN/A 811360SN/Atemplate <class OS> 81211907SBrandon.Potter@amd.comSyscallReturn 81311907SBrandon.Potter@amd.comopenImpl(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc, 81411907SBrandon.Potter@amd.com bool isopenat) 815360SN/A{ 81611907SBrandon.Potter@amd.com int index = 0; 81711907SBrandon.Potter@amd.com int tgt_dirfd = -1; 81811907SBrandon.Potter@amd.com 81911907SBrandon.Potter@amd.com /** 82011907SBrandon.Potter@amd.com * If using the openat variant, read in the target directory file 82111907SBrandon.Potter@amd.com * descriptor from the simulated process. 82211907SBrandon.Potter@amd.com */ 82311907SBrandon.Potter@amd.com if (isopenat) 82411907SBrandon.Potter@amd.com tgt_dirfd = p->getSyscallArg(tc, index); 82511907SBrandon.Potter@amd.com 82611907SBrandon.Potter@amd.com /** 82711907SBrandon.Potter@amd.com * Retrieve the simulated process' memory proxy and then read in the path 82811907SBrandon.Potter@amd.com * string from that memory space into the host's working memory space. 82911907SBrandon.Potter@amd.com */ 830360SN/A std::string path; 83111907SBrandon.Potter@amd.com if (!tc->getMemProxy().tryReadString(path, p->getSyscallArg(tc, index))) 8321458SN/A return -EFAULT; 833360SN/A 83411907SBrandon.Potter@amd.com#ifdef __CYGWIN32__ 83511907SBrandon.Potter@amd.com int host_flags = O_BINARY; 83611907SBrandon.Potter@amd.com#else 83711907SBrandon.Potter@amd.com int host_flags = 0; 83811907SBrandon.Potter@amd.com#endif 83911907SBrandon.Potter@amd.com /** 84011907SBrandon.Potter@amd.com * Translate target flags into host flags. Flags exist which are not 84111907SBrandon.Potter@amd.com * ported between architectures which can cause check failures. 84211907SBrandon.Potter@amd.com */ 84311907SBrandon.Potter@amd.com int tgt_flags = p->getSyscallArg(tc, index); 844360SN/A for (int i = 0; i < OS::NUM_OPEN_FLAGS; i++) { 84511907SBrandon.Potter@amd.com if (tgt_flags & OS::openFlagTable[i].tgtFlag) { 84611907SBrandon.Potter@amd.com tgt_flags &= ~OS::openFlagTable[i].tgtFlag; 84711907SBrandon.Potter@amd.com host_flags |= OS::openFlagTable[i].hostFlag; 848360SN/A } 849360SN/A } 85011907SBrandon.Potter@amd.com if (tgt_flags) { 85111907SBrandon.Potter@amd.com warn("open%s: cannot decode flags 0x%x", 85211907SBrandon.Potter@amd.com isopenat ? "at" : "", tgt_flags); 85311907SBrandon.Potter@amd.com } 854360SN/A#ifdef __CYGWIN32__ 85511907SBrandon.Potter@amd.com host_flags |= O_BINARY; 856360SN/A#endif 857360SN/A 85811907SBrandon.Potter@amd.com int mode = p->getSyscallArg(tc, index); 8593669Sbinkertn@umich.edu 86011907SBrandon.Potter@amd.com /** 86111907SBrandon.Potter@amd.com * If the simulated process called open or openat with AT_FDCWD specified, 86211907SBrandon.Potter@amd.com * take the current working directory value which was passed into the 86311907SBrandon.Potter@amd.com * process class as a Python parameter and append the current path to 86411907SBrandon.Potter@amd.com * create a full path. 86511907SBrandon.Potter@amd.com * Otherwise, openat with a valid target directory file descriptor has 86611907SBrandon.Potter@amd.com * been called. If the path option, which was passed in as a parameter, 86711907SBrandon.Potter@amd.com * is not absolute, retrieve the directory file descriptor's path and 86811907SBrandon.Potter@amd.com * prepend it to the path passed in as a parameter. 86911907SBrandon.Potter@amd.com * In every case, we should have a full path (which is relevant to the 87011907SBrandon.Potter@amd.com * host) to work with after this block has been passed. 87111907SBrandon.Potter@amd.com */ 87213883Sdavid.hashe@amd.com std::string redir_path = path; 87313883Sdavid.hashe@amd.com std::string abs_path = path; 87413883Sdavid.hashe@amd.com if (!isopenat || tgt_dirfd == OS::TGT_AT_FDCWD) { 87513883Sdavid.hashe@amd.com abs_path = p->absolutePath(path, true); 87613883Sdavid.hashe@amd.com redir_path = p->checkPathRedirect(path); 87711907SBrandon.Potter@amd.com } else if (!startswith(path, "/")) { 87811907SBrandon.Potter@amd.com std::shared_ptr<FDEntry> fdep = ((*p->fds)[tgt_dirfd]); 87911907SBrandon.Potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(fdep); 88011907SBrandon.Potter@amd.com if (!ffdp) 88111907SBrandon.Potter@amd.com return -EBADF; 88213883Sdavid.hashe@amd.com abs_path = ffdp->getFileName() + path; 88313883Sdavid.hashe@amd.com redir_path = p->checkPathRedirect(abs_path); 88411907SBrandon.Potter@amd.com } 8851706SN/A 88611907SBrandon.Potter@amd.com /** 88711907SBrandon.Potter@amd.com * Since this is an emulated environment, we create pseudo file 88811907SBrandon.Potter@amd.com * descriptors for device requests that have been registered with 88911907SBrandon.Potter@amd.com * the process class through Python; this allows us to create a file 89011907SBrandon.Potter@amd.com * descriptor for subsequent ioctl or mmap calls. 89111907SBrandon.Potter@amd.com */ 89213883Sdavid.hashe@amd.com if (startswith(abs_path, "/dev/")) { 89313883Sdavid.hashe@amd.com std::string filename = abs_path.substr(strlen("/dev/")); 89411907SBrandon.Potter@amd.com EmulatedDriver *drv = p->findDriver(filename); 89511907SBrandon.Potter@amd.com if (drv) { 89611907SBrandon.Potter@amd.com DPRINTF_SYSCALL(Verbose, "open%s: passing call to " 89711907SBrandon.Potter@amd.com "driver open with path[%s]\n", 89813883Sdavid.hashe@amd.com isopenat ? "at" : "", abs_path.c_str()); 89911907SBrandon.Potter@amd.com return drv->open(p, tc, mode, host_flags); 90010496Ssteve.reinhardt@amd.com } 90111907SBrandon.Potter@amd.com /** 90211907SBrandon.Potter@amd.com * Fall through here for pass through to host devices, such 90311907SBrandon.Potter@amd.com * as /dev/zero 90411907SBrandon.Potter@amd.com */ 90510496Ssteve.reinhardt@amd.com } 90610496Ssteve.reinhardt@amd.com 90711907SBrandon.Potter@amd.com /** 90813883Sdavid.hashe@amd.com * We make several attempts resolve a call to open. 90913883Sdavid.hashe@amd.com * 91013883Sdavid.hashe@amd.com * 1) Resolve any path redirection before hand. This will set the path 91113883Sdavid.hashe@amd.com * up with variable 'redir_path' which may contain a modified path or 91213883Sdavid.hashe@amd.com * the original path value. This should already be done in prior code. 91313883Sdavid.hashe@amd.com * 2) Try to handle the access using 'special_paths'. Some special_paths 91413883Sdavid.hashe@amd.com * and files cannot be called on the host and need to be handled as 91513883Sdavid.hashe@amd.com * special cases inside the simulator. These special_paths are handled by 91613883Sdavid.hashe@amd.com * C++ routines to provide output back to userspace. 91713883Sdavid.hashe@amd.com * 3) If the full path that was created above does not match any of the 91813883Sdavid.hashe@amd.com * special cases, pass it through to the open call on the __HOST__ to let 91913883Sdavid.hashe@amd.com * the host open the file on our behalf. Again, the openImpl tries to 92013883Sdavid.hashe@amd.com * USE_THE_HOST_FILESYSTEM_OPEN (with a possible redirection to the 92113883Sdavid.hashe@amd.com * faux-filesystem files). The faux-filesystem is dynamically created 92213883Sdavid.hashe@amd.com * during simulator configuration using Python functions. 92313883Sdavid.hashe@amd.com * 4) If the host cannot open the file, the open attempt failed in "3)". 92413883Sdavid.hashe@amd.com * Return the host's error code back through the system call to the 92513883Sdavid.hashe@amd.com * simulated process. If running a debug trace, also notify the user that 92613883Sdavid.hashe@amd.com * the open call failed. 92713883Sdavid.hashe@amd.com * 92813883Sdavid.hashe@amd.com * Any success will set sim_fd to something other than -1 and skip the 92913883Sdavid.hashe@amd.com * next conditions effectively bypassing them. 93011907SBrandon.Potter@amd.com */ 93111907SBrandon.Potter@amd.com int sim_fd = -1; 93213883Sdavid.hashe@amd.com std::string used_path; 93311907SBrandon.Potter@amd.com std::vector<std::string> special_paths = 93413883Sdavid.hashe@amd.com { "/proc/meminfo/", "/system/", "/sys/", "/platform/", 93513883Sdavid.hashe@amd.com "/etc/passwd" }; 93611907SBrandon.Potter@amd.com for (auto entry : special_paths) { 93713883Sdavid.hashe@amd.com if (startswith(path, entry)) { 93813883Sdavid.hashe@amd.com sim_fd = OS::openSpecialFile(abs_path, p, tc); 93913883Sdavid.hashe@amd.com used_path = abs_path; 94013883Sdavid.hashe@amd.com } 94111907SBrandon.Potter@amd.com } 94211907SBrandon.Potter@amd.com if (sim_fd == -1) { 94313883Sdavid.hashe@amd.com sim_fd = open(redir_path.c_str(), host_flags, mode); 94413883Sdavid.hashe@amd.com used_path = redir_path; 94511907SBrandon.Potter@amd.com } 94611907SBrandon.Potter@amd.com if (sim_fd == -1) { 94711907SBrandon.Potter@amd.com int local = -errno; 94813883Sdavid.hashe@amd.com DPRINTF_SYSCALL(Verbose, "open%s: failed -> path:%s " 94913883Sdavid.hashe@amd.com "(inferred from:%s)\n", isopenat ? "at" : "", 95013883Sdavid.hashe@amd.com used_path.c_str(), path.c_str()); 95111907SBrandon.Potter@amd.com return local; 95211907SBrandon.Potter@amd.com } 953360SN/A 95411907SBrandon.Potter@amd.com /** 95511907SBrandon.Potter@amd.com * The file was opened successfully and needs to be recorded in the 95611907SBrandon.Potter@amd.com * process' file descriptor array so that it can be retrieved later. 95711907SBrandon.Potter@amd.com * The target file descriptor that is chosen will be the lowest unused 95811907SBrandon.Potter@amd.com * file descriptor. 95911907SBrandon.Potter@amd.com * Return the indirect target file descriptor back to the simulated 96011907SBrandon.Potter@amd.com * process to act as a handle for the opened file. 96111907SBrandon.Potter@amd.com */ 96211907SBrandon.Potter@amd.com auto ffdp = std::make_shared<FileFDEntry>(sim_fd, host_flags, path, 0); 96311907SBrandon.Potter@amd.com int tgt_fd = p->fds->allocFD(ffdp); 96413883Sdavid.hashe@amd.com DPRINTF_SYSCALL(Verbose, "open%s: sim_fd[%d], target_fd[%d] -> path:%s\n" 96513883Sdavid.hashe@amd.com "(inferred from:%s)\n", isopenat ? "at" : "", 96613883Sdavid.hashe@amd.com sim_fd, tgt_fd, used_path.c_str(), path.c_str()); 96711907SBrandon.Potter@amd.com return tgt_fd; 968360SN/A} 969360SN/A 97010027SChris.Adeniyi-Jones@arm.com/// Target open() handler. 97110027SChris.Adeniyi-Jones@arm.comtemplate <class OS> 97210027SChris.Adeniyi-Jones@arm.comSyscallReturn 97311851Sbrandon.potter@amd.comopenFunc(SyscallDesc *desc, int callnum, Process *process, 97410027SChris.Adeniyi-Jones@arm.com ThreadContext *tc) 97510027SChris.Adeniyi-Jones@arm.com{ 97611907SBrandon.Potter@amd.com return openImpl<OS>(desc, callnum, process, tc, false); 97710027SChris.Adeniyi-Jones@arm.com} 97810027SChris.Adeniyi-Jones@arm.com 97910027SChris.Adeniyi-Jones@arm.com/// Target openat() handler. 98010027SChris.Adeniyi-Jones@arm.comtemplate <class OS> 98110027SChris.Adeniyi-Jones@arm.comSyscallReturn 98211851Sbrandon.potter@amd.comopenatFunc(SyscallDesc *desc, int callnum, Process *process, 98311851Sbrandon.potter@amd.com ThreadContext *tc) 98410027SChris.Adeniyi-Jones@arm.com{ 98511907SBrandon.Potter@amd.com return openImpl<OS>(desc, callnum, process, tc, true); 98610027SChris.Adeniyi-Jones@arm.com} 98710027SChris.Adeniyi-Jones@arm.com 98810633Smichaelupton@gmail.com/// Target unlinkat() handler. 98910633Smichaelupton@gmail.comtemplate <class OS> 99010633Smichaelupton@gmail.comSyscallReturn 99111851Sbrandon.potter@amd.comunlinkatFunc(SyscallDesc *desc, int callnum, Process *process, 99210633Smichaelupton@gmail.com ThreadContext *tc) 99310633Smichaelupton@gmail.com{ 99410633Smichaelupton@gmail.com int index = 0; 99510633Smichaelupton@gmail.com int dirfd = process->getSyscallArg(tc, index); 99610633Smichaelupton@gmail.com if (dirfd != OS::TGT_AT_FDCWD) 99710633Smichaelupton@gmail.com warn("unlinkat: first argument not AT_FDCWD; unlikely to work"); 99810633Smichaelupton@gmail.com 99910633Smichaelupton@gmail.com return unlinkHelper(desc, callnum, process, tc, 1); 100010633Smichaelupton@gmail.com} 100110633Smichaelupton@gmail.com 100210203SAli.Saidi@ARM.com/// Target facessat() handler 100310203SAli.Saidi@ARM.comtemplate <class OS> 100410203SAli.Saidi@ARM.comSyscallReturn 100511851Sbrandon.potter@amd.comfaccessatFunc(SyscallDesc *desc, int callnum, Process *process, 100611851Sbrandon.potter@amd.com ThreadContext *tc) 100710203SAli.Saidi@ARM.com{ 100810203SAli.Saidi@ARM.com int index = 0; 100910203SAli.Saidi@ARM.com int dirfd = process->getSyscallArg(tc, index); 101010203SAli.Saidi@ARM.com if (dirfd != OS::TGT_AT_FDCWD) 101110203SAli.Saidi@ARM.com warn("faccessat: first argument not AT_FDCWD; unlikely to work"); 101210203SAli.Saidi@ARM.com return accessFunc(desc, callnum, process, tc, 1); 101310203SAli.Saidi@ARM.com} 101410203SAli.Saidi@ARM.com 101510203SAli.Saidi@ARM.com/// Target readlinkat() handler 101610203SAli.Saidi@ARM.comtemplate <class OS> 101710203SAli.Saidi@ARM.comSyscallReturn 101811851Sbrandon.potter@amd.comreadlinkatFunc(SyscallDesc *desc, int callnum, Process *process, 101911851Sbrandon.potter@amd.com ThreadContext *tc) 102010203SAli.Saidi@ARM.com{ 102110203SAli.Saidi@ARM.com int index = 0; 102210203SAli.Saidi@ARM.com int dirfd = process->getSyscallArg(tc, index); 102310203SAli.Saidi@ARM.com if (dirfd != OS::TGT_AT_FDCWD) 102410203SAli.Saidi@ARM.com warn("openat: first argument not AT_FDCWD; unlikely to work"); 102510203SAli.Saidi@ARM.com return readlinkFunc(desc, callnum, process, tc, 1); 102610203SAli.Saidi@ARM.com} 102710203SAli.Saidi@ARM.com 102810850SGiacomo.Gabrielli@arm.com/// Target renameat() handler. 102910850SGiacomo.Gabrielli@arm.comtemplate <class OS> 103010850SGiacomo.Gabrielli@arm.comSyscallReturn 103111851Sbrandon.potter@amd.comrenameatFunc(SyscallDesc *desc, int callnum, Process *process, 103210850SGiacomo.Gabrielli@arm.com ThreadContext *tc) 103310850SGiacomo.Gabrielli@arm.com{ 103410850SGiacomo.Gabrielli@arm.com int index = 0; 103510850SGiacomo.Gabrielli@arm.com 103610850SGiacomo.Gabrielli@arm.com int olddirfd = process->getSyscallArg(tc, index); 103710850SGiacomo.Gabrielli@arm.com if (olddirfd != OS::TGT_AT_FDCWD) 103810850SGiacomo.Gabrielli@arm.com warn("renameat: first argument not AT_FDCWD; unlikely to work"); 103910850SGiacomo.Gabrielli@arm.com 104010850SGiacomo.Gabrielli@arm.com std::string old_name; 104110850SGiacomo.Gabrielli@arm.com 104210850SGiacomo.Gabrielli@arm.com if (!tc->getMemProxy().tryReadString(old_name, 104310850SGiacomo.Gabrielli@arm.com process->getSyscallArg(tc, index))) 104410850SGiacomo.Gabrielli@arm.com return -EFAULT; 104510850SGiacomo.Gabrielli@arm.com 104610850SGiacomo.Gabrielli@arm.com int newdirfd = process->getSyscallArg(tc, index); 104710850SGiacomo.Gabrielli@arm.com if (newdirfd != OS::TGT_AT_FDCWD) 104810850SGiacomo.Gabrielli@arm.com warn("renameat: third argument not AT_FDCWD; unlikely to work"); 104910850SGiacomo.Gabrielli@arm.com 105010850SGiacomo.Gabrielli@arm.com std::string new_name; 105110850SGiacomo.Gabrielli@arm.com 105210850SGiacomo.Gabrielli@arm.com if (!tc->getMemProxy().tryReadString(new_name, 105310850SGiacomo.Gabrielli@arm.com process->getSyscallArg(tc, index))) 105410850SGiacomo.Gabrielli@arm.com return -EFAULT; 105510850SGiacomo.Gabrielli@arm.com 105613883Sdavid.hashe@amd.com // Adjust path for cwd and redirection 105713883Sdavid.hashe@amd.com old_name = process->checkPathRedirect(old_name); 105813883Sdavid.hashe@amd.com new_name = process->checkPathRedirect(new_name); 105910850SGiacomo.Gabrielli@arm.com 106010850SGiacomo.Gabrielli@arm.com int result = rename(old_name.c_str(), new_name.c_str()); 106110850SGiacomo.Gabrielli@arm.com return (result == -1) ? -errno : result; 106210850SGiacomo.Gabrielli@arm.com} 106310850SGiacomo.Gabrielli@arm.com 10646640Svince@csl.cornell.edu/// Target sysinfo() handler. 10656640Svince@csl.cornell.edutemplate <class OS> 10666640Svince@csl.cornell.eduSyscallReturn 106711851Sbrandon.potter@amd.comsysinfoFunc(SyscallDesc *desc, int callnum, Process *process, 106811851Sbrandon.potter@amd.com ThreadContext *tc) 10696640Svince@csl.cornell.edu{ 10706640Svince@csl.cornell.edu 10716701Sgblack@eecs.umich.edu int index = 0; 10726701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::tgt_sysinfo> 107310793Sbrandon.potter@amd.com sysinfo(process->getSyscallArg(tc, index)); 10746640Svince@csl.cornell.edu 107511758Sbrandon.potter@amd.com sysinfo->uptime = seconds_since_epoch; 107611758Sbrandon.potter@amd.com sysinfo->totalram = process->system->memSize(); 107711758Sbrandon.potter@amd.com sysinfo->mem_unit = 1; 10786640Svince@csl.cornell.edu 10798706Sandreas.hansson@arm.com sysinfo.copyOut(tc->getMemProxy()); 10806640Svince@csl.cornell.edu 10816701Sgblack@eecs.umich.edu return 0; 10826640Svince@csl.cornell.edu} 1083360SN/A 10841999SN/A/// Target chmod() handler. 10851999SN/Atemplate <class OS> 10861999SN/ASyscallReturn 108711851Sbrandon.potter@amd.comchmodFunc(SyscallDesc *desc, int callnum, Process *process, 10882680Sktlim@umich.edu ThreadContext *tc) 10891999SN/A{ 10901999SN/A std::string path; 10911999SN/A 10926701Sgblack@eecs.umich.edu int index = 0; 10938852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 10946701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 10951999SN/A return -EFAULT; 10966701Sgblack@eecs.umich.edu } 10971999SN/A 10986701Sgblack@eecs.umich.edu uint32_t mode = process->getSyscallArg(tc, index); 10991999SN/A mode_t hostMode = 0; 11001999SN/A 11011999SN/A // XXX translate mode flags via OS::something??? 11021999SN/A hostMode = mode; 11031999SN/A 110413883Sdavid.hashe@amd.com // Adjust path for cwd and redirection 110513883Sdavid.hashe@amd.com path = process->checkPathRedirect(path); 11063669Sbinkertn@umich.edu 11071999SN/A // do the chmod 11081999SN/A int result = chmod(path.c_str(), hostMode); 11091999SN/A if (result < 0) 11102218SN/A return -errno; 11111999SN/A 11121999SN/A return 0; 11131999SN/A} 11141999SN/A 111513570Sbrandon.potter@amd.comtemplate <class OS> 111613570Sbrandon.potter@amd.comSyscallReturn 111713570Sbrandon.potter@amd.compollFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 111813570Sbrandon.potter@amd.com{ 111913570Sbrandon.potter@amd.com int index = 0; 112013570Sbrandon.potter@amd.com Addr fdsPtr = p->getSyscallArg(tc, index); 112113570Sbrandon.potter@amd.com int nfds = p->getSyscallArg(tc, index); 112213570Sbrandon.potter@amd.com int tmout = p->getSyscallArg(tc, index); 112313570Sbrandon.potter@amd.com 112413570Sbrandon.potter@amd.com BufferArg fdsBuf(fdsPtr, sizeof(struct pollfd) * nfds); 112513570Sbrandon.potter@amd.com fdsBuf.copyIn(tc->getMemProxy()); 112613570Sbrandon.potter@amd.com 112713570Sbrandon.potter@amd.com /** 112813570Sbrandon.potter@amd.com * Record the target file descriptors in a local variable. We need to 112913570Sbrandon.potter@amd.com * replace them with host file descriptors but we need a temporary copy 113013570Sbrandon.potter@amd.com * for later. Afterwards, replace each target file descriptor in the 113113570Sbrandon.potter@amd.com * poll_fd array with its host_fd. 113213570Sbrandon.potter@amd.com */ 113313570Sbrandon.potter@amd.com int temp_tgt_fds[nfds]; 113413570Sbrandon.potter@amd.com for (index = 0; index < nfds; index++) { 113513570Sbrandon.potter@amd.com temp_tgt_fds[index] = ((struct pollfd *)fdsBuf.bufferPtr())[index].fd; 113613570Sbrandon.potter@amd.com auto tgt_fd = temp_tgt_fds[index]; 113713570Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 113813570Sbrandon.potter@amd.com if (!hbfdp) 113913570Sbrandon.potter@amd.com return -EBADF; 114013570Sbrandon.potter@amd.com auto host_fd = hbfdp->getSimFD(); 114113570Sbrandon.potter@amd.com ((struct pollfd *)fdsBuf.bufferPtr())[index].fd = host_fd; 114213570Sbrandon.potter@amd.com } 114313570Sbrandon.potter@amd.com 114413570Sbrandon.potter@amd.com /** 114513570Sbrandon.potter@amd.com * We cannot allow an infinite poll to occur or it will inevitably cause 114613570Sbrandon.potter@amd.com * a deadlock in the gem5 simulator with clone. We must pass in tmout with 114713570Sbrandon.potter@amd.com * a non-negative value, however it also makes no sense to poll on the 114813570Sbrandon.potter@amd.com * underlying host for any other time than tmout a zero timeout. 114913570Sbrandon.potter@amd.com */ 115013570Sbrandon.potter@amd.com int status; 115113570Sbrandon.potter@amd.com if (tmout < 0) { 115213570Sbrandon.potter@amd.com status = poll((struct pollfd *)fdsBuf.bufferPtr(), nfds, 0); 115313570Sbrandon.potter@amd.com if (status == 0) { 115413570Sbrandon.potter@amd.com /** 115513570Sbrandon.potter@amd.com * If blocking indefinitely, check the signal list to see if a 115613570Sbrandon.potter@amd.com * signal would break the poll out of the retry cycle and try 115713570Sbrandon.potter@amd.com * to return the signal interrupt instead. 115813570Sbrandon.potter@amd.com */ 115913570Sbrandon.potter@amd.com System *sysh = tc->getSystemPtr(); 116013570Sbrandon.potter@amd.com std::list<BasicSignal>::iterator it; 116113570Sbrandon.potter@amd.com for (it=sysh->signalList.begin(); it!=sysh->signalList.end(); it++) 116213570Sbrandon.potter@amd.com if (it->receiver == p) 116313570Sbrandon.potter@amd.com return -EINTR; 116413570Sbrandon.potter@amd.com return SyscallReturn::retry(); 116513570Sbrandon.potter@amd.com } 116613570Sbrandon.potter@amd.com } else 116713570Sbrandon.potter@amd.com status = poll((struct pollfd *)fdsBuf.bufferPtr(), nfds, 0); 116813570Sbrandon.potter@amd.com 116913570Sbrandon.potter@amd.com if (status == -1) 117013570Sbrandon.potter@amd.com return -errno; 117113570Sbrandon.potter@amd.com 117213570Sbrandon.potter@amd.com /** 117313570Sbrandon.potter@amd.com * Replace each host_fd in the returned poll_fd array with its original 117413570Sbrandon.potter@amd.com * target file descriptor. 117513570Sbrandon.potter@amd.com */ 117613570Sbrandon.potter@amd.com for (index = 0; index < nfds; index++) { 117713570Sbrandon.potter@amd.com auto tgt_fd = temp_tgt_fds[index]; 117813570Sbrandon.potter@amd.com ((struct pollfd *)fdsBuf.bufferPtr())[index].fd = tgt_fd; 117913570Sbrandon.potter@amd.com } 118013570Sbrandon.potter@amd.com 118113570Sbrandon.potter@amd.com /** 118213570Sbrandon.potter@amd.com * Copy out the pollfd struct because the host may have updated fields 118313570Sbrandon.potter@amd.com * in the structure. 118413570Sbrandon.potter@amd.com */ 118513570Sbrandon.potter@amd.com fdsBuf.copyOut(tc->getMemProxy()); 118613570Sbrandon.potter@amd.com 118713570Sbrandon.potter@amd.com return status; 118813570Sbrandon.potter@amd.com} 11891999SN/A 11901999SN/A/// Target fchmod() handler. 11911999SN/Atemplate <class OS> 11921999SN/ASyscallReturn 119311856Sbrandon.potter@amd.comfchmodFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 11941999SN/A{ 11956701Sgblack@eecs.umich.edu int index = 0; 119611856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 119711856Sbrandon.potter@amd.com uint32_t mode = p->getSyscallArg(tc, index); 119810931Sbrandon.potter@amd.com 119911856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 120011856Sbrandon.potter@amd.com if (!ffdp) 12011999SN/A return -EBADF; 120211856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 12031999SN/A 120411856Sbrandon.potter@amd.com mode_t hostMode = mode; 12051999SN/A 120611856Sbrandon.potter@amd.com int result = fchmod(sim_fd, hostMode); 12071999SN/A 120811856Sbrandon.potter@amd.com return (result < 0) ? -errno : 0; 12091999SN/A} 12101999SN/A 12115877Shsul@eecs.umich.edu/// Target mremap() handler. 12125877Shsul@eecs.umich.edutemplate <class OS> 12135877Shsul@eecs.umich.eduSyscallReturn 121411851Sbrandon.potter@amd.commremapFunc(SyscallDesc *desc, int callnum, Process *process, ThreadContext *tc) 12155877Shsul@eecs.umich.edu{ 12166701Sgblack@eecs.umich.edu int index = 0; 12176701Sgblack@eecs.umich.edu Addr start = process->getSyscallArg(tc, index); 12186701Sgblack@eecs.umich.edu uint64_t old_length = process->getSyscallArg(tc, index); 12196701Sgblack@eecs.umich.edu uint64_t new_length = process->getSyscallArg(tc, index); 12206701Sgblack@eecs.umich.edu uint64_t flags = process->getSyscallArg(tc, index); 122110027SChris.Adeniyi-Jones@arm.com uint64_t provided_address = 0; 122210027SChris.Adeniyi-Jones@arm.com bool use_provided_address = flags & OS::TGT_MREMAP_FIXED; 122310027SChris.Adeniyi-Jones@arm.com 122410027SChris.Adeniyi-Jones@arm.com if (use_provided_address) 122510027SChris.Adeniyi-Jones@arm.com provided_address = process->getSyscallArg(tc, index); 12265877Shsul@eecs.umich.edu 122710318Sandreas.hansson@arm.com if ((start % TheISA::PageBytes != 0) || 122810318Sandreas.hansson@arm.com (provided_address % TheISA::PageBytes != 0)) { 12295877Shsul@eecs.umich.edu warn("mremap failing: arguments not page aligned"); 12305877Shsul@eecs.umich.edu return -EINVAL; 12315877Shsul@eecs.umich.edu } 12325877Shsul@eecs.umich.edu 123310486Stjablin@gmail.com new_length = roundUp(new_length, TheISA::PageBytes); 123410486Stjablin@gmail.com 12355877Shsul@eecs.umich.edu if (new_length > old_length) { 123611905SBrandon.Potter@amd.com std::shared_ptr<MemState> mem_state = process->memState; 123711905SBrandon.Potter@amd.com Addr mmap_end = mem_state->getMmapEnd(); 123811905SBrandon.Potter@amd.com 123911905SBrandon.Potter@amd.com if ((start + old_length) == mmap_end && 124010027SChris.Adeniyi-Jones@arm.com (!use_provided_address || provided_address == start)) { 124112206Srico.amslinger@informatik.uni-augsburg.de // This case cannot occur when growing downward, as 124212206Srico.amslinger@informatik.uni-augsburg.de // start is greater than or equal to mmap_end. 12435877Shsul@eecs.umich.edu uint64_t diff = new_length - old_length; 124411905SBrandon.Potter@amd.com process->allocateMem(mmap_end, diff); 124511905SBrandon.Potter@amd.com mem_state->setMmapEnd(mmap_end + diff); 12465877Shsul@eecs.umich.edu return start; 12475877Shsul@eecs.umich.edu } else { 124810027SChris.Adeniyi-Jones@arm.com if (!use_provided_address && !(flags & OS::TGT_MREMAP_MAYMOVE)) { 12495877Shsul@eecs.umich.edu warn("can't remap here and MREMAP_MAYMOVE flag not set\n"); 12505877Shsul@eecs.umich.edu return -ENOMEM; 12515877Shsul@eecs.umich.edu } else { 125212206Srico.amslinger@informatik.uni-augsburg.de uint64_t new_start = provided_address; 125312206Srico.amslinger@informatik.uni-augsburg.de if (!use_provided_address) { 125412206Srico.amslinger@informatik.uni-augsburg.de new_start = process->mmapGrowsDown() ? 125512206Srico.amslinger@informatik.uni-augsburg.de mmap_end - new_length : mmap_end; 125612206Srico.amslinger@informatik.uni-augsburg.de mmap_end = process->mmapGrowsDown() ? 125712206Srico.amslinger@informatik.uni-augsburg.de new_start : mmap_end + new_length; 125812206Srico.amslinger@informatik.uni-augsburg.de mem_state->setMmapEnd(mmap_end); 125912206Srico.amslinger@informatik.uni-augsburg.de } 126012206Srico.amslinger@informatik.uni-augsburg.de 126110027SChris.Adeniyi-Jones@arm.com process->pTable->remap(start, old_length, new_start); 126210027SChris.Adeniyi-Jones@arm.com warn("mremapping to new vaddr %08p-%08p, adding %d\n", 126310027SChris.Adeniyi-Jones@arm.com new_start, new_start + new_length, 126410027SChris.Adeniyi-Jones@arm.com new_length - old_length); 12655877Shsul@eecs.umich.edu // add on the remaining unallocated pages 126610027SChris.Adeniyi-Jones@arm.com process->allocateMem(new_start + old_length, 126710027SChris.Adeniyi-Jones@arm.com new_length - old_length, 126810027SChris.Adeniyi-Jones@arm.com use_provided_address /* clobber */); 126910027SChris.Adeniyi-Jones@arm.com if (use_provided_address && 127012206Srico.amslinger@informatik.uni-augsburg.de ((new_start + new_length > mem_state->getMmapEnd() && 127112206Srico.amslinger@informatik.uni-augsburg.de !process->mmapGrowsDown()) || 127212206Srico.amslinger@informatik.uni-augsburg.de (new_start < mem_state->getMmapEnd() && 127312206Srico.amslinger@informatik.uni-augsburg.de process->mmapGrowsDown()))) { 127410027SChris.Adeniyi-Jones@arm.com // something fishy going on here, at least notify the user 127510027SChris.Adeniyi-Jones@arm.com // @todo: increase mmap_end? 127610027SChris.Adeniyi-Jones@arm.com warn("mmap region limit exceeded with MREMAP_FIXED\n"); 127710027SChris.Adeniyi-Jones@arm.com } 127810027SChris.Adeniyi-Jones@arm.com warn("returning %08p as start\n", new_start); 127910027SChris.Adeniyi-Jones@arm.com return new_start; 12805877Shsul@eecs.umich.edu } 12815877Shsul@eecs.umich.edu } 12825877Shsul@eecs.umich.edu } else { 128310027SChris.Adeniyi-Jones@arm.com if (use_provided_address && provided_address != start) 128410027SChris.Adeniyi-Jones@arm.com process->pTable->remap(start, new_length, provided_address); 12858601Ssteve.reinhardt@amd.com process->pTable->unmap(start + new_length, old_length - new_length); 128610027SChris.Adeniyi-Jones@arm.com return use_provided_address ? provided_address : start; 12875877Shsul@eecs.umich.edu } 12885877Shsul@eecs.umich.edu} 12891999SN/A 1290378SN/A/// Target stat() handler. 1291360SN/Atemplate <class OS> 12921450SN/ASyscallReturn 129311851Sbrandon.potter@amd.comstatFunc(SyscallDesc *desc, int callnum, Process *process, 12942680Sktlim@umich.edu ThreadContext *tc) 1295360SN/A{ 1296360SN/A std::string path; 1297360SN/A 12986701Sgblack@eecs.umich.edu int index = 0; 12998852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 13006701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 13016701Sgblack@eecs.umich.edu return -EFAULT; 13026701Sgblack@eecs.umich.edu } 13036701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 1304360SN/A 130513883Sdavid.hashe@amd.com // Adjust path for cwd and redirection 130613883Sdavid.hashe@amd.com path = process->checkPathRedirect(path); 13073669Sbinkertn@umich.edu 1308360SN/A struct stat hostBuf; 1309360SN/A int result = stat(path.c_str(), &hostBuf); 1310360SN/A 1311360SN/A if (result < 0) 13122218SN/A return -errno; 1313360SN/A 13148706Sandreas.hansson@arm.com copyOutStatBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 1315360SN/A 13161458SN/A return 0; 1317360SN/A} 1318360SN/A 1319360SN/A 13205074Ssaidi@eecs.umich.edu/// Target stat64() handler. 13215074Ssaidi@eecs.umich.edutemplate <class OS> 13225074Ssaidi@eecs.umich.eduSyscallReturn 132311851Sbrandon.potter@amd.comstat64Func(SyscallDesc *desc, int callnum, Process *process, 13245074Ssaidi@eecs.umich.edu ThreadContext *tc) 13255074Ssaidi@eecs.umich.edu{ 13265074Ssaidi@eecs.umich.edu std::string path; 13275074Ssaidi@eecs.umich.edu 13286701Sgblack@eecs.umich.edu int index = 0; 13298852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 13306701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) 13315074Ssaidi@eecs.umich.edu return -EFAULT; 13326701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 13335074Ssaidi@eecs.umich.edu 133413883Sdavid.hashe@amd.com // Adjust path for cwd and redirection 133513883Sdavid.hashe@amd.com path = process->checkPathRedirect(path); 13365074Ssaidi@eecs.umich.edu 13375208Ssaidi@eecs.umich.edu#if NO_STAT64 13385208Ssaidi@eecs.umich.edu struct stat hostBuf; 13395208Ssaidi@eecs.umich.edu int result = stat(path.c_str(), &hostBuf); 13405208Ssaidi@eecs.umich.edu#else 13415074Ssaidi@eecs.umich.edu struct stat64 hostBuf; 13425074Ssaidi@eecs.umich.edu int result = stat64(path.c_str(), &hostBuf); 13435208Ssaidi@eecs.umich.edu#endif 13445074Ssaidi@eecs.umich.edu 13455074Ssaidi@eecs.umich.edu if (result < 0) 13465074Ssaidi@eecs.umich.edu return -errno; 13475074Ssaidi@eecs.umich.edu 13488706Sandreas.hansson@arm.com copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 13495074Ssaidi@eecs.umich.edu 13505074Ssaidi@eecs.umich.edu return 0; 13515074Ssaidi@eecs.umich.edu} 13525074Ssaidi@eecs.umich.edu 13535074Ssaidi@eecs.umich.edu 135410027SChris.Adeniyi-Jones@arm.com/// Target fstatat64() handler. 135510027SChris.Adeniyi-Jones@arm.comtemplate <class OS> 135610027SChris.Adeniyi-Jones@arm.comSyscallReturn 135711851Sbrandon.potter@amd.comfstatat64Func(SyscallDesc *desc, int callnum, Process *process, 135810027SChris.Adeniyi-Jones@arm.com ThreadContext *tc) 135910027SChris.Adeniyi-Jones@arm.com{ 136010027SChris.Adeniyi-Jones@arm.com int index = 0; 136110027SChris.Adeniyi-Jones@arm.com int dirfd = process->getSyscallArg(tc, index); 136210027SChris.Adeniyi-Jones@arm.com if (dirfd != OS::TGT_AT_FDCWD) 136310793Sbrandon.potter@amd.com warn("fstatat64: first argument not AT_FDCWD; unlikely to work"); 136410027SChris.Adeniyi-Jones@arm.com 136510027SChris.Adeniyi-Jones@arm.com std::string path; 136610027SChris.Adeniyi-Jones@arm.com if (!tc->getMemProxy().tryReadString(path, 136710027SChris.Adeniyi-Jones@arm.com process->getSyscallArg(tc, index))) 136810027SChris.Adeniyi-Jones@arm.com return -EFAULT; 136910027SChris.Adeniyi-Jones@arm.com Addr bufPtr = process->getSyscallArg(tc, index); 137010027SChris.Adeniyi-Jones@arm.com 137113883Sdavid.hashe@amd.com // Adjust path for cwd and redirection 137213883Sdavid.hashe@amd.com path = process->checkPathRedirect(path); 137310027SChris.Adeniyi-Jones@arm.com 137410027SChris.Adeniyi-Jones@arm.com#if NO_STAT64 137510027SChris.Adeniyi-Jones@arm.com struct stat hostBuf; 137610027SChris.Adeniyi-Jones@arm.com int result = stat(path.c_str(), &hostBuf); 137710027SChris.Adeniyi-Jones@arm.com#else 137810027SChris.Adeniyi-Jones@arm.com struct stat64 hostBuf; 137910027SChris.Adeniyi-Jones@arm.com int result = stat64(path.c_str(), &hostBuf); 138010027SChris.Adeniyi-Jones@arm.com#endif 138110027SChris.Adeniyi-Jones@arm.com 138210027SChris.Adeniyi-Jones@arm.com if (result < 0) 138310027SChris.Adeniyi-Jones@arm.com return -errno; 138410027SChris.Adeniyi-Jones@arm.com 138510027SChris.Adeniyi-Jones@arm.com copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 138610027SChris.Adeniyi-Jones@arm.com 138710027SChris.Adeniyi-Jones@arm.com return 0; 138810027SChris.Adeniyi-Jones@arm.com} 138910027SChris.Adeniyi-Jones@arm.com 139010027SChris.Adeniyi-Jones@arm.com 13911999SN/A/// Target fstat64() handler. 13921999SN/Atemplate <class OS> 13931999SN/ASyscallReturn 139411856Sbrandon.potter@amd.comfstat64Func(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 13951999SN/A{ 13966701Sgblack@eecs.umich.edu int index = 0; 139711856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 139811856Sbrandon.potter@amd.com Addr bufPtr = p->getSyscallArg(tc, index); 139910931Sbrandon.potter@amd.com 140011856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 140111856Sbrandon.potter@amd.com if (!ffdp) 14021999SN/A return -EBADF; 140311856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 14041999SN/A 14052764Sstever@eecs.umich.edu#if NO_STAT64 14062064SN/A struct stat hostBuf; 140710931Sbrandon.potter@amd.com int result = fstat(sim_fd, &hostBuf); 14082064SN/A#else 14092064SN/A struct stat64 hostBuf; 141010931Sbrandon.potter@amd.com int result = fstat64(sim_fd, &hostBuf); 14112064SN/A#endif 14121999SN/A 14131999SN/A if (result < 0) 14142218SN/A return -errno; 14151999SN/A 141610931Sbrandon.potter@amd.com copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf, (sim_fd == 1)); 14171999SN/A 14181999SN/A return 0; 14191999SN/A} 14201999SN/A 14211999SN/A 1422378SN/A/// Target lstat() handler. 1423360SN/Atemplate <class OS> 14241450SN/ASyscallReturn 142511851Sbrandon.potter@amd.comlstatFunc(SyscallDesc *desc, int callnum, Process *process, 14262680Sktlim@umich.edu ThreadContext *tc) 1427360SN/A{ 1428360SN/A std::string path; 1429360SN/A 14306701Sgblack@eecs.umich.edu int index = 0; 14318852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 14326701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 14336701Sgblack@eecs.umich.edu return -EFAULT; 14346701Sgblack@eecs.umich.edu } 14356701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 1436360SN/A 143713883Sdavid.hashe@amd.com // Adjust path for cwd and redirection 143813883Sdavid.hashe@amd.com path = process->checkPathRedirect(path); 14393669Sbinkertn@umich.edu 1440360SN/A struct stat hostBuf; 1441360SN/A int result = lstat(path.c_str(), &hostBuf); 1442360SN/A 1443360SN/A if (result < 0) 14441458SN/A return -errno; 1445360SN/A 14468706Sandreas.hansson@arm.com copyOutStatBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 1447360SN/A 14481458SN/A return 0; 1449360SN/A} 1450360SN/A 14511999SN/A/// Target lstat64() handler. 14521999SN/Atemplate <class OS> 14531999SN/ASyscallReturn 145411851Sbrandon.potter@amd.comlstat64Func(SyscallDesc *desc, int callnum, Process *process, 14552680Sktlim@umich.edu ThreadContext *tc) 14561999SN/A{ 14571999SN/A std::string path; 14581999SN/A 14596701Sgblack@eecs.umich.edu int index = 0; 14608852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 14616701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 14626701Sgblack@eecs.umich.edu return -EFAULT; 14636701Sgblack@eecs.umich.edu } 14646701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 14651999SN/A 146613883Sdavid.hashe@amd.com // Adjust path for cwd and redirection 146713883Sdavid.hashe@amd.com path = process->checkPathRedirect(path); 14683669Sbinkertn@umich.edu 14692764Sstever@eecs.umich.edu#if NO_STAT64 14702064SN/A struct stat hostBuf; 14712064SN/A int result = lstat(path.c_str(), &hostBuf); 14722064SN/A#else 14731999SN/A struct stat64 hostBuf; 14741999SN/A int result = lstat64(path.c_str(), &hostBuf); 14752064SN/A#endif 14761999SN/A 14771999SN/A if (result < 0) 14781999SN/A return -errno; 14791999SN/A 14808706Sandreas.hansson@arm.com copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 14811999SN/A 14821999SN/A return 0; 14831999SN/A} 14841999SN/A 1485378SN/A/// Target fstat() handler. 1486360SN/Atemplate <class OS> 14871450SN/ASyscallReturn 148811856Sbrandon.potter@amd.comfstatFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 1489360SN/A{ 14906701Sgblack@eecs.umich.edu int index = 0; 149111856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 149211856Sbrandon.potter@amd.com Addr bufPtr = p->getSyscallArg(tc, index); 1493360SN/A 149411380Salexandru.dutu@amd.com DPRINTF_SYSCALL(Verbose, "fstat(%d, ...)\n", tgt_fd); 1495360SN/A 149611856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 149711856Sbrandon.potter@amd.com if (!ffdp) 14981458SN/A return -EBADF; 149911856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 1500360SN/A 1501360SN/A struct stat hostBuf; 150210931Sbrandon.potter@amd.com int result = fstat(sim_fd, &hostBuf); 1503360SN/A 1504360SN/A if (result < 0) 15051458SN/A return -errno; 1506360SN/A 150710931Sbrandon.potter@amd.com copyOutStatBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf, (sim_fd == 1)); 15082021SN/A 15091458SN/A return 0; 1510360SN/A} 1511360SN/A 15121706SN/A/// Target statfs() handler. 15131706SN/Atemplate <class OS> 15141706SN/ASyscallReturn 151511851Sbrandon.potter@amd.comstatfsFunc(SyscallDesc *desc, int callnum, Process *process, 15162680Sktlim@umich.edu ThreadContext *tc) 15171706SN/A{ 151813933Sbrandon.potter@amd.com#ifdef __linux__ 15191706SN/A std::string path; 15201706SN/A 15216701Sgblack@eecs.umich.edu int index = 0; 15228852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 15236701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 15246701Sgblack@eecs.umich.edu return -EFAULT; 15256701Sgblack@eecs.umich.edu } 15266701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 15271706SN/A 152813883Sdavid.hashe@amd.com // Adjust path for cwd and redirection 152913883Sdavid.hashe@amd.com path = process->checkPathRedirect(path); 15303669Sbinkertn@umich.edu 15311706SN/A struct statfs hostBuf; 15321706SN/A int result = statfs(path.c_str(), &hostBuf); 15331706SN/A 15341706SN/A if (result < 0) 15352218SN/A return -errno; 15361706SN/A 153711759Sbrandon.potter@amd.com copyOutStatfsBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 153813933Sbrandon.potter@amd.com return 0; 153913933Sbrandon.potter@amd.com#else 154013933Sbrandon.potter@amd.com warnUnsupportedOS("statfs"); 154113933Sbrandon.potter@amd.com return -1; 154211799Sbrandon.potter@amd.com#endif 15431706SN/A} 15441706SN/A 154511886Sbrandon.potter@amd.comtemplate <class OS> 154611886Sbrandon.potter@amd.comSyscallReturn 154711886Sbrandon.potter@amd.comcloneFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 154811886Sbrandon.potter@amd.com{ 154911886Sbrandon.potter@amd.com int index = 0; 155012426Sqtt2@cornell.edu 155113557Sgabeblack@google.com RegVal flags = p->getSyscallArg(tc, index); 155213557Sgabeblack@google.com RegVal newStack = p->getSyscallArg(tc, index); 155311886Sbrandon.potter@amd.com Addr ptidPtr = p->getSyscallArg(tc, index); 155412426Sqtt2@cornell.edu 155513534Sandreas.sandberg@arm.com#if THE_ISA == RISCV_ISA or THE_ISA == ARM_ISA 155612426Sqtt2@cornell.edu /** 155713534Sandreas.sandberg@arm.com * Linux sets CLONE_BACKWARDS flag for RISC-V and Arm. 155812426Sqtt2@cornell.edu * The flag defines the list of clone() arguments in the following 155912426Sqtt2@cornell.edu * order: flags -> newStack -> ptidPtr -> tlsPtr -> ctidPtr 156012426Sqtt2@cornell.edu */ 156113536Sandreas.sandberg@arm.com Addr tlsPtr = p->getSyscallArg(tc, index); 156212426Sqtt2@cornell.edu Addr ctidPtr = p->getSyscallArg(tc, index); 156312426Sqtt2@cornell.edu#else 156411886Sbrandon.potter@amd.com Addr ctidPtr = p->getSyscallArg(tc, index); 156513536Sandreas.sandberg@arm.com Addr tlsPtr = p->getSyscallArg(tc, index); 156612426Sqtt2@cornell.edu#endif 156711886Sbrandon.potter@amd.com 156811886Sbrandon.potter@amd.com if (((flags & OS::TGT_CLONE_SIGHAND)&& !(flags & OS::TGT_CLONE_VM)) || 156911886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_THREAD) && !(flags & OS::TGT_CLONE_SIGHAND)) || 157011886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_FS) && (flags & OS::TGT_CLONE_NEWNS)) || 157111886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_NEWIPC) && (flags & OS::TGT_CLONE_SYSVSEM)) || 157211886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_NEWPID) && (flags & OS::TGT_CLONE_THREAD)) || 157311886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_VM) && !(newStack))) 157411886Sbrandon.potter@amd.com return -EINVAL; 157511886Sbrandon.potter@amd.com 157611886Sbrandon.potter@amd.com ThreadContext *ctc; 157713649Sqtt2@cornell.edu if (!(ctc = p->findFreeContext())) { 157813649Sqtt2@cornell.edu DPRINTF_SYSCALL(Verbose, "clone: no spare thread context in system" 157913649Sqtt2@cornell.edu "[cpu %d, thread %d]", tc->cpuId(), tc->threadId()); 158013649Sqtt2@cornell.edu return -EAGAIN; 158113649Sqtt2@cornell.edu } 158211886Sbrandon.potter@amd.com 158311886Sbrandon.potter@amd.com /** 158411886Sbrandon.potter@amd.com * Note that ProcessParams is generated by swig and there are no other 158511886Sbrandon.potter@amd.com * examples of how to create anything but this default constructor. The 158611886Sbrandon.potter@amd.com * fields are manually initialized instead of passing parameters to the 158711886Sbrandon.potter@amd.com * constructor. 158811886Sbrandon.potter@amd.com */ 158911886Sbrandon.potter@amd.com ProcessParams *pp = new ProcessParams(); 159011886Sbrandon.potter@amd.com pp->executable.assign(*(new std::string(p->progName()))); 159111886Sbrandon.potter@amd.com pp->cmd.push_back(*(new std::string(p->progName()))); 159211886Sbrandon.potter@amd.com pp->system = p->system; 159313883Sdavid.hashe@amd.com pp->cwd.assign(p->tgtCwd); 159411886Sbrandon.potter@amd.com pp->input.assign("stdin"); 159511886Sbrandon.potter@amd.com pp->output.assign("stdout"); 159611886Sbrandon.potter@amd.com pp->errout.assign("stderr"); 159711886Sbrandon.potter@amd.com pp->uid = p->uid(); 159811886Sbrandon.potter@amd.com pp->euid = p->euid(); 159911886Sbrandon.potter@amd.com pp->gid = p->gid(); 160011886Sbrandon.potter@amd.com pp->egid = p->egid(); 160111886Sbrandon.potter@amd.com 160211886Sbrandon.potter@amd.com /* Find the first free PID that's less than the maximum */ 160311886Sbrandon.potter@amd.com std::set<int> const& pids = p->system->PIDs; 160411886Sbrandon.potter@amd.com int temp_pid = *pids.begin(); 160511886Sbrandon.potter@amd.com do { 160611886Sbrandon.potter@amd.com temp_pid++; 160711886Sbrandon.potter@amd.com } while (pids.find(temp_pid) != pids.end()); 160811886Sbrandon.potter@amd.com if (temp_pid >= System::maxPID) 160911886Sbrandon.potter@amd.com fatal("temp_pid is too large: %d", temp_pid); 161011886Sbrandon.potter@amd.com 161111886Sbrandon.potter@amd.com pp->pid = temp_pid; 161211886Sbrandon.potter@amd.com pp->ppid = (flags & OS::TGT_CLONE_THREAD) ? p->ppid() : p->pid(); 161313867Salexandru.dutu@amd.com pp->useArchPT = p->useArchPT; 161413867Salexandru.dutu@amd.com pp->kvmInSE = p->kvmInSE; 161511886Sbrandon.potter@amd.com Process *cp = pp->create(); 161611886Sbrandon.potter@amd.com delete pp; 161711886Sbrandon.potter@amd.com 161811886Sbrandon.potter@amd.com Process *owner = ctc->getProcessPtr(); 161911886Sbrandon.potter@amd.com ctc->setProcessPtr(cp); 162011886Sbrandon.potter@amd.com cp->assignThreadContext(ctc->contextId()); 162111886Sbrandon.potter@amd.com owner->revokeThreadContext(ctc->contextId()); 162211886Sbrandon.potter@amd.com 162311886Sbrandon.potter@amd.com if (flags & OS::TGT_CLONE_PARENT_SETTID) { 162411886Sbrandon.potter@amd.com BufferArg ptidBuf(ptidPtr, sizeof(long)); 162511886Sbrandon.potter@amd.com long *ptid = (long *)ptidBuf.bufferPtr(); 162611886Sbrandon.potter@amd.com *ptid = cp->pid(); 162711886Sbrandon.potter@amd.com ptidBuf.copyOut(tc->getMemProxy()); 162811886Sbrandon.potter@amd.com } 162911886Sbrandon.potter@amd.com 163013867Salexandru.dutu@amd.com if (flags & OS::TGT_CLONE_THREAD) { 163113867Salexandru.dutu@amd.com cp->pTable->shared = true; 163213867Salexandru.dutu@amd.com cp->useForClone = true; 163313867Salexandru.dutu@amd.com } 163411886Sbrandon.potter@amd.com cp->initState(); 163511886Sbrandon.potter@amd.com p->clone(tc, ctc, cp, flags); 163611886Sbrandon.potter@amd.com 163711911SBrandon.Potter@amd.com if (flags & OS::TGT_CLONE_THREAD) { 163811911SBrandon.Potter@amd.com delete cp->sigchld; 163911911SBrandon.Potter@amd.com cp->sigchld = p->sigchld; 164011911SBrandon.Potter@amd.com } else if (flags & OS::TGT_SIGCHLD) { 164111911SBrandon.Potter@amd.com *cp->sigchld = true; 164211911SBrandon.Potter@amd.com } 164311911SBrandon.Potter@amd.com 164411886Sbrandon.potter@amd.com if (flags & OS::TGT_CLONE_CHILD_SETTID) { 164511886Sbrandon.potter@amd.com BufferArg ctidBuf(ctidPtr, sizeof(long)); 164611886Sbrandon.potter@amd.com long *ctid = (long *)ctidBuf.bufferPtr(); 164711886Sbrandon.potter@amd.com *ctid = cp->pid(); 164811886Sbrandon.potter@amd.com ctidBuf.copyOut(ctc->getMemProxy()); 164911886Sbrandon.potter@amd.com } 165011886Sbrandon.potter@amd.com 165111886Sbrandon.potter@amd.com if (flags & OS::TGT_CLONE_CHILD_CLEARTID) 165211886Sbrandon.potter@amd.com cp->childClearTID = (uint64_t)ctidPtr; 165311886Sbrandon.potter@amd.com 165411886Sbrandon.potter@amd.com ctc->clearArchRegs(); 165511886Sbrandon.potter@amd.com 165613536Sandreas.sandberg@arm.com OS::archClone(flags, p, cp, tc, ctc, newStack, tlsPtr); 165711886Sbrandon.potter@amd.com 165811886Sbrandon.potter@amd.com cp->setSyscallReturn(ctc, 0); 165911886Sbrandon.potter@amd.com 166011886Sbrandon.potter@amd.com#if THE_ISA == ALPHA_ISA 166111886Sbrandon.potter@amd.com ctc->setIntReg(TheISA::SyscallSuccessReg, 0); 166211886Sbrandon.potter@amd.com#elif THE_ISA == SPARC_ISA 166311886Sbrandon.potter@amd.com tc->setIntReg(TheISA::SyscallPseudoReturnReg, 0); 166411886Sbrandon.potter@amd.com ctc->setIntReg(TheISA::SyscallPseudoReturnReg, 1); 166511886Sbrandon.potter@amd.com#endif 166611886Sbrandon.potter@amd.com 166713867Salexandru.dutu@amd.com if (p->kvmInSE) { 166813867Salexandru.dutu@amd.com#if THE_ISA == X86_ISA 166913867Salexandru.dutu@amd.com ctc->pcState(tc->readIntReg(TheISA::INTREG_RCX)); 167013867Salexandru.dutu@amd.com#else 167113867Salexandru.dutu@amd.com panic("KVM CPU model is not supported for this ISA"); 167213867Salexandru.dutu@amd.com#endif 167313867Salexandru.dutu@amd.com } else { 167413867Salexandru.dutu@amd.com TheISA::PCState cpc = tc->pcState(); 167513867Salexandru.dutu@amd.com cpc.advance(); 167613867Salexandru.dutu@amd.com ctc->pcState(cpc); 167713867Salexandru.dutu@amd.com } 167811886Sbrandon.potter@amd.com ctc->activate(); 167911886Sbrandon.potter@amd.com 168011886Sbrandon.potter@amd.com return cp->pid(); 168111886Sbrandon.potter@amd.com} 16821706SN/A 16831706SN/A/// Target fstatfs() handler. 16841706SN/Atemplate <class OS> 16851706SN/ASyscallReturn 168611856Sbrandon.potter@amd.comfstatfsFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 16871706SN/A{ 16886701Sgblack@eecs.umich.edu int index = 0; 168911856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 169011856Sbrandon.potter@amd.com Addr bufPtr = p->getSyscallArg(tc, index); 16911706SN/A 169211856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 169311856Sbrandon.potter@amd.com if (!ffdp) 16941706SN/A return -EBADF; 169511856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 16961706SN/A 16971706SN/A struct statfs hostBuf; 169810931Sbrandon.potter@amd.com int result = fstatfs(sim_fd, &hostBuf); 16991706SN/A 17001706SN/A if (result < 0) 17012218SN/A return -errno; 17021706SN/A 170311759Sbrandon.potter@amd.com copyOutStatfsBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 17041706SN/A 17051706SN/A return 0; 17061706SN/A} 17071706SN/A 170813572Sbrandon.potter@amd.com/// Target readv() handler. 170913572Sbrandon.potter@amd.comtemplate <class OS> 171013572Sbrandon.potter@amd.comSyscallReturn 171113572Sbrandon.potter@amd.comreadvFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 171213572Sbrandon.potter@amd.com{ 171313572Sbrandon.potter@amd.com int index = 0; 171413572Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 171513572Sbrandon.potter@amd.com 171613572Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 171713572Sbrandon.potter@amd.com if (!ffdp) 171813572Sbrandon.potter@amd.com return -EBADF; 171913572Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 172013572Sbrandon.potter@amd.com 172113572Sbrandon.potter@amd.com SETranslatingPortProxy &prox = tc->getMemProxy(); 172213572Sbrandon.potter@amd.com uint64_t tiov_base = p->getSyscallArg(tc, index); 172313572Sbrandon.potter@amd.com size_t count = p->getSyscallArg(tc, index); 172413572Sbrandon.potter@amd.com typename OS::tgt_iovec tiov[count]; 172513572Sbrandon.potter@amd.com struct iovec hiov[count]; 172613572Sbrandon.potter@amd.com for (size_t i = 0; i < count; ++i) { 172713572Sbrandon.potter@amd.com prox.readBlob(tiov_base + (i * sizeof(typename OS::tgt_iovec)), 172813572Sbrandon.potter@amd.com (uint8_t*)&tiov[i], sizeof(typename OS::tgt_iovec)); 172913572Sbrandon.potter@amd.com hiov[i].iov_len = TheISA::gtoh(tiov[i].iov_len); 173013572Sbrandon.potter@amd.com hiov[i].iov_base = new char [hiov[i].iov_len]; 173113572Sbrandon.potter@amd.com } 173213572Sbrandon.potter@amd.com 173313572Sbrandon.potter@amd.com int result = readv(sim_fd, hiov, count); 173413572Sbrandon.potter@amd.com int local_errno = errno; 173513572Sbrandon.potter@amd.com 173613572Sbrandon.potter@amd.com for (size_t i = 0; i < count; ++i) { 173713572Sbrandon.potter@amd.com if (result != -1) { 173813572Sbrandon.potter@amd.com prox.writeBlob(TheISA::htog(tiov[i].iov_base), 173913572Sbrandon.potter@amd.com (uint8_t*)hiov[i].iov_base, hiov[i].iov_len); 174013572Sbrandon.potter@amd.com } 174113572Sbrandon.potter@amd.com delete [] (char *)hiov[i].iov_base; 174213572Sbrandon.potter@amd.com } 174313572Sbrandon.potter@amd.com 174413572Sbrandon.potter@amd.com return (result == -1) ? -local_errno : result; 174513572Sbrandon.potter@amd.com} 17461706SN/A 17471999SN/A/// Target writev() handler. 17481999SN/Atemplate <class OS> 17491999SN/ASyscallReturn 175011856Sbrandon.potter@amd.comwritevFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 17511999SN/A{ 17526701Sgblack@eecs.umich.edu int index = 0; 175311856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 175410931Sbrandon.potter@amd.com 175511856Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 175611856Sbrandon.potter@amd.com if (!hbfdp) 17571999SN/A return -EBADF; 175811856Sbrandon.potter@amd.com int sim_fd = hbfdp->getSimFD(); 17591999SN/A 176011856Sbrandon.potter@amd.com SETranslatingPortProxy &prox = tc->getMemProxy(); 176111856Sbrandon.potter@amd.com uint64_t tiov_base = p->getSyscallArg(tc, index); 176211856Sbrandon.potter@amd.com size_t count = p->getSyscallArg(tc, index); 17631999SN/A struct iovec hiov[count]; 17646227Snate@binkert.org for (size_t i = 0; i < count; ++i) { 17651999SN/A typename OS::tgt_iovec tiov; 17662461SN/A 176711856Sbrandon.potter@amd.com prox.readBlob(tiov_base + i*sizeof(typename OS::tgt_iovec), 176811856Sbrandon.potter@amd.com (uint8_t*)&tiov, sizeof(typename OS::tgt_iovec)); 17698737Skoansin.tan@gmail.com hiov[i].iov_len = TheISA::gtoh(tiov.iov_len); 17701999SN/A hiov[i].iov_base = new char [hiov[i].iov_len]; 177111856Sbrandon.potter@amd.com prox.readBlob(TheISA::gtoh(tiov.iov_base), (uint8_t *)hiov[i].iov_base, 177211856Sbrandon.potter@amd.com hiov[i].iov_len); 17731999SN/A } 17741999SN/A 177510931Sbrandon.potter@amd.com int result = writev(sim_fd, hiov, count); 17761999SN/A 17776227Snate@binkert.org for (size_t i = 0; i < count; ++i) 17781999SN/A delete [] (char *)hiov[i].iov_base; 17791999SN/A 178013572Sbrandon.potter@amd.com return (result == -1) ? -errno : result; 17811999SN/A} 17821999SN/A 178311385Sbrandon.potter@amd.com/// Real mmap handler. 1784360SN/Atemplate <class OS> 17851450SN/ASyscallReturn 178611851Sbrandon.potter@amd.commmapImpl(SyscallDesc *desc, int num, Process *p, ThreadContext *tc, 178711385Sbrandon.potter@amd.com bool is_mmap2) 1788360SN/A{ 17896701Sgblack@eecs.umich.edu int index = 0; 17906701Sgblack@eecs.umich.edu Addr start = p->getSyscallArg(tc, index); 17916701Sgblack@eecs.umich.edu uint64_t length = p->getSyscallArg(tc, index); 179211383Sbrandon.potter@amd.com int prot = p->getSyscallArg(tc, index); 179311383Sbrandon.potter@amd.com int tgt_flags = p->getSyscallArg(tc, index); 17948324Ssteve.reinhardt@amd.com int tgt_fd = p->getSyscallArg(tc, index); 179510486Stjablin@gmail.com int offset = p->getSyscallArg(tc, index); 1796360SN/A 179711385Sbrandon.potter@amd.com if (is_mmap2) 179811385Sbrandon.potter@amd.com offset *= TheISA::PageBytes; 17999008Sgblack@eecs.umich.edu 180011383Sbrandon.potter@amd.com if (start & (TheISA::PageBytes - 1) || 180111383Sbrandon.potter@amd.com offset & (TheISA::PageBytes - 1) || 180211383Sbrandon.potter@amd.com (tgt_flags & OS::TGT_MAP_PRIVATE && 180311383Sbrandon.potter@amd.com tgt_flags & OS::TGT_MAP_SHARED) || 180411383Sbrandon.potter@amd.com (!(tgt_flags & OS::TGT_MAP_PRIVATE) && 180511383Sbrandon.potter@amd.com !(tgt_flags & OS::TGT_MAP_SHARED)) || 180611383Sbrandon.potter@amd.com !length) { 180711383Sbrandon.potter@amd.com return -EINVAL; 180811383Sbrandon.potter@amd.com } 18098324Ssteve.reinhardt@amd.com 181011383Sbrandon.potter@amd.com if ((prot & PROT_WRITE) && (tgt_flags & OS::TGT_MAP_SHARED)) { 181111383Sbrandon.potter@amd.com // With shared mmaps, there are two cases to consider: 181211383Sbrandon.potter@amd.com // 1) anonymous: writes should modify the mapping and this should be 181311383Sbrandon.potter@amd.com // visible to observers who share the mapping. Currently, it's 181411383Sbrandon.potter@amd.com // difficult to update the shared mapping because there's no 181511383Sbrandon.potter@amd.com // structure which maintains information about the which virtual 181611383Sbrandon.potter@amd.com // memory areas are shared. If that structure existed, it would be 181711383Sbrandon.potter@amd.com // possible to make the translations point to the same frames. 181811383Sbrandon.potter@amd.com // 2) file-backed: writes should modify the mapping and the file 181911383Sbrandon.potter@amd.com // which is backed by the mapping. The shared mapping problem is the 182011383Sbrandon.potter@amd.com // same as what was mentioned about the anonymous mappings. For 182111383Sbrandon.potter@amd.com // file-backed mappings, the writes to the file are difficult 182211383Sbrandon.potter@amd.com // because it requires syncing what the mapping holds with the file 182311383Sbrandon.potter@amd.com // that resides on the host system. So, any write on a real system 182411383Sbrandon.potter@amd.com // would cause the change to be propagated to the file mapping at 182511383Sbrandon.potter@amd.com // some point in the future (the inode is tracked along with the 182611383Sbrandon.potter@amd.com // mapping). This isn't guaranteed to always happen, but it usually 182711383Sbrandon.potter@amd.com // works well enough. The guarantee is provided by the msync system 182811383Sbrandon.potter@amd.com // call. We could force the change through with shared mappings with 182911383Sbrandon.potter@amd.com // a call to msync, but that again would require more information 183011383Sbrandon.potter@amd.com // than we currently maintain. 183111383Sbrandon.potter@amd.com warn("mmap: writing to shared mmap region is currently " 183211383Sbrandon.potter@amd.com "unsupported. The write succeeds on the target, but it " 183311383Sbrandon.potter@amd.com "will not be propagated to the host or shared mappings"); 18348324Ssteve.reinhardt@amd.com } 18355877Shsul@eecs.umich.edu 183610486Stjablin@gmail.com length = roundUp(length, TheISA::PageBytes); 183710486Stjablin@gmail.com 183811383Sbrandon.potter@amd.com int sim_fd = -1; 183911383Sbrandon.potter@amd.com uint8_t *pmap = nullptr; 184011383Sbrandon.potter@amd.com if (!(tgt_flags & OS::TGT_MAP_ANONYMOUS)) { 184111856Sbrandon.potter@amd.com std::shared_ptr<FDEntry> fdep = (*p->fds)[tgt_fd]; 184211624Smichael.lebeane@amd.com 184311856Sbrandon.potter@amd.com auto dfdp = std::dynamic_pointer_cast<DeviceFDEntry>(fdep); 184411856Sbrandon.potter@amd.com if (dfdp) { 184511856Sbrandon.potter@amd.com EmulatedDriver *emul_driver = dfdp->getDriver(); 184611856Sbrandon.potter@amd.com return emul_driver->mmap(p, tc, start, length, prot, 184711624Smichael.lebeane@amd.com tgt_flags, tgt_fd, offset); 184811624Smichael.lebeane@amd.com } 184911624Smichael.lebeane@amd.com 185011856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(fdep); 185111856Sbrandon.potter@amd.com if (!ffdp) 185211383Sbrandon.potter@amd.com return -EBADF; 185311856Sbrandon.potter@amd.com sim_fd = ffdp->getSimFD(); 1854360SN/A 185511913SBrandon.Potter@amd.com pmap = (decltype(pmap))mmap(nullptr, length, PROT_READ, MAP_PRIVATE, 185611383Sbrandon.potter@amd.com sim_fd, offset); 18578600Ssteve.reinhardt@amd.com 185811383Sbrandon.potter@amd.com if (pmap == (decltype(pmap))-1) { 185911383Sbrandon.potter@amd.com warn("mmap: failed to map file into host address space"); 186011383Sbrandon.potter@amd.com return -errno; 18618600Ssteve.reinhardt@amd.com } 18622544SN/A } 18632544SN/A 186411383Sbrandon.potter@amd.com // Extend global mmap region if necessary. Note that we ignore the 186511383Sbrandon.potter@amd.com // start address unless MAP_FIXED is specified. 186611383Sbrandon.potter@amd.com if (!(tgt_flags & OS::TGT_MAP_FIXED)) { 186711905SBrandon.Potter@amd.com std::shared_ptr<MemState> mem_state = p->memState; 186811905SBrandon.Potter@amd.com Addr mmap_end = mem_state->getMmapEnd(); 186911905SBrandon.Potter@amd.com 187011905SBrandon.Potter@amd.com start = p->mmapGrowsDown() ? mmap_end - length : mmap_end; 187111905SBrandon.Potter@amd.com mmap_end = p->mmapGrowsDown() ? start : mmap_end + length; 187211905SBrandon.Potter@amd.com 187311905SBrandon.Potter@amd.com mem_state->setMmapEnd(mmap_end); 187411383Sbrandon.potter@amd.com } 187511383Sbrandon.potter@amd.com 187611383Sbrandon.potter@amd.com DPRINTF_SYSCALL(Verbose, " mmap range is 0x%x - 0x%x\n", 187711383Sbrandon.potter@amd.com start, start + length - 1); 187811383Sbrandon.potter@amd.com 187911383Sbrandon.potter@amd.com // We only allow mappings to overwrite existing mappings if 188011383Sbrandon.potter@amd.com // TGT_MAP_FIXED is set. Otherwise it shouldn't be a problem 188111383Sbrandon.potter@amd.com // because we ignore the start hint if TGT_MAP_FIXED is not set. 188211383Sbrandon.potter@amd.com int clobber = tgt_flags & OS::TGT_MAP_FIXED; 188311383Sbrandon.potter@amd.com if (clobber) { 188411383Sbrandon.potter@amd.com for (auto tc : p->system->threadContexts) { 188511383Sbrandon.potter@amd.com // If we might be overwriting old mappings, we need to 188611383Sbrandon.potter@amd.com // invalidate potentially stale mappings out of the TLBs. 188711383Sbrandon.potter@amd.com tc->getDTBPtr()->flushAll(); 188811383Sbrandon.potter@amd.com tc->getITBPtr()->flushAll(); 18898600Ssteve.reinhardt@amd.com } 18906672Sgblack@eecs.umich.edu } 18918600Ssteve.reinhardt@amd.com 189211383Sbrandon.potter@amd.com // Allocate physical memory and map it in. If the page table is already 189311383Sbrandon.potter@amd.com // mapped and clobber is not set, the simulator will issue throw a 189411383Sbrandon.potter@amd.com // fatal and bail out of the simulation. 18958601Ssteve.reinhardt@amd.com p->allocateMem(start, length, clobber); 18962544SN/A 189711383Sbrandon.potter@amd.com // Transfer content into target address space. 189811383Sbrandon.potter@amd.com SETranslatingPortProxy &tp = tc->getMemProxy(); 189911383Sbrandon.potter@amd.com if (tgt_flags & OS::TGT_MAP_ANONYMOUS) { 190011383Sbrandon.potter@amd.com // In general, we should zero the mapped area for anonymous mappings, 190111383Sbrandon.potter@amd.com // with something like: 190211383Sbrandon.potter@amd.com // tp.memsetBlob(start, 0, length); 190311383Sbrandon.potter@amd.com // However, given that we don't support sparse mappings, and 190411383Sbrandon.potter@amd.com // some applications can map a couple of gigabytes of space 190511383Sbrandon.potter@amd.com // (intending sparse usage), that can get painfully expensive. 190611383Sbrandon.potter@amd.com // Fortunately, since we don't properly implement munmap either, 190711383Sbrandon.potter@amd.com // there's no danger of remapping used memory, so for now all 190811383Sbrandon.potter@amd.com // newly mapped memory should already be zeroed so we can skip it. 190911383Sbrandon.potter@amd.com } else { 191011383Sbrandon.potter@amd.com // It is possible to mmap an area larger than a file, however 191111383Sbrandon.potter@amd.com // accessing unmapped portions the system triggers a "Bus error" 191211383Sbrandon.potter@amd.com // on the host. We must know when to stop copying the file from 191311383Sbrandon.potter@amd.com // the host into the target address space. 191411383Sbrandon.potter@amd.com struct stat file_stat; 191511383Sbrandon.potter@amd.com if (fstat(sim_fd, &file_stat) > 0) 191611383Sbrandon.potter@amd.com fatal("mmap: cannot stat file"); 191711383Sbrandon.potter@amd.com 191811383Sbrandon.potter@amd.com // Copy the portion of the file that is resident. This requires 191911383Sbrandon.potter@amd.com // checking both the mmap size and the filesize that we are 192011383Sbrandon.potter@amd.com // trying to mmap into this space; the mmap size also depends 192111383Sbrandon.potter@amd.com // on the specified offset into the file. 192211383Sbrandon.potter@amd.com uint64_t size = std::min((uint64_t)file_stat.st_size - offset, 192311383Sbrandon.potter@amd.com length); 192411383Sbrandon.potter@amd.com tp.writeBlob(start, pmap, size); 192511383Sbrandon.potter@amd.com 192611383Sbrandon.potter@amd.com // Cleanup the mmap region before exiting this function. 192711383Sbrandon.potter@amd.com munmap(pmap, length); 192811383Sbrandon.potter@amd.com 192911392Sbrandon.potter@amd.com // Maintain the symbol table for dynamic executables. 193011392Sbrandon.potter@amd.com // The loader will call mmap to map the images into its address 193111392Sbrandon.potter@amd.com // space and we intercept that here. We can verify that we are 193211392Sbrandon.potter@amd.com // executing inside the loader by checking the program counter value. 193311392Sbrandon.potter@amd.com // XXX: with multiprogrammed workloads or multi-node configurations, 193411392Sbrandon.potter@amd.com // this will not work since there is a single global symbol table. 193511392Sbrandon.potter@amd.com ObjectFile *interpreter = p->getInterpreter(); 193611392Sbrandon.potter@amd.com if (interpreter) { 193711392Sbrandon.potter@amd.com Addr text_start = interpreter->textBase(); 193811392Sbrandon.potter@amd.com Addr text_end = text_start + interpreter->textSize(); 193911392Sbrandon.potter@amd.com 194011392Sbrandon.potter@amd.com Addr pc = tc->pcState().pc(); 194111392Sbrandon.potter@amd.com 194211392Sbrandon.potter@amd.com if (pc >= text_start && pc < text_end) { 194311856Sbrandon.potter@amd.com std::shared_ptr<FDEntry> fdep = (*p->fds)[tgt_fd]; 194411856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(fdep); 194511856Sbrandon.potter@amd.com ObjectFile *lib = createObjectFile(ffdp->getFileName()); 194611392Sbrandon.potter@amd.com 194711392Sbrandon.potter@amd.com if (lib) { 194811392Sbrandon.potter@amd.com lib->loadAllSymbols(debugSymbolTable, 194911392Sbrandon.potter@amd.com lib->textBase(), start); 195011392Sbrandon.potter@amd.com } 195111392Sbrandon.potter@amd.com } 195211392Sbrandon.potter@amd.com } 195311392Sbrandon.potter@amd.com 195411383Sbrandon.potter@amd.com // Note that we do not zero out the remainder of the mapping. This 195511383Sbrandon.potter@amd.com // is done by a real system, but it probably will not affect 195611383Sbrandon.potter@amd.com // execution (hopefully). 195711383Sbrandon.potter@amd.com } 195811383Sbrandon.potter@amd.com 19591458SN/A return start; 1960360SN/A} 1961360SN/A 196211593Santhony.gutierrez@amd.comtemplate <class OS> 196311593Santhony.gutierrez@amd.comSyscallReturn 196411851Sbrandon.potter@amd.compwrite64Func(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 196511593Santhony.gutierrez@amd.com{ 196611593Santhony.gutierrez@amd.com int index = 0; 196711593Santhony.gutierrez@amd.com int tgt_fd = p->getSyscallArg(tc, index); 196811593Santhony.gutierrez@amd.com Addr bufPtr = p->getSyscallArg(tc, index); 196911593Santhony.gutierrez@amd.com int nbytes = p->getSyscallArg(tc, index); 197011593Santhony.gutierrez@amd.com int offset = p->getSyscallArg(tc, index); 197111593Santhony.gutierrez@amd.com 197211856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 197311856Sbrandon.potter@amd.com if (!ffdp) 197411593Santhony.gutierrez@amd.com return -EBADF; 197511856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 197611593Santhony.gutierrez@amd.com 197711593Santhony.gutierrez@amd.com BufferArg bufArg(bufPtr, nbytes); 197811593Santhony.gutierrez@amd.com bufArg.copyIn(tc->getMemProxy()); 197911593Santhony.gutierrez@amd.com 198011594Santhony.gutierrez@amd.com int bytes_written = pwrite(sim_fd, bufArg.bufferPtr(), nbytes, offset); 198111593Santhony.gutierrez@amd.com 198211593Santhony.gutierrez@amd.com return (bytes_written == -1) ? -errno : bytes_written; 198311593Santhony.gutierrez@amd.com} 198411593Santhony.gutierrez@amd.com 198511385Sbrandon.potter@amd.com/// Target mmap() handler. 198611385Sbrandon.potter@amd.comtemplate <class OS> 198711385Sbrandon.potter@amd.comSyscallReturn 198811851Sbrandon.potter@amd.commmapFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 198911385Sbrandon.potter@amd.com{ 199011385Sbrandon.potter@amd.com return mmapImpl<OS>(desc, num, p, tc, false); 199111385Sbrandon.potter@amd.com} 199211385Sbrandon.potter@amd.com 199311385Sbrandon.potter@amd.com/// Target mmap2() handler. 199411385Sbrandon.potter@amd.comtemplate <class OS> 199511385Sbrandon.potter@amd.comSyscallReturn 199611851Sbrandon.potter@amd.commmap2Func(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 199711385Sbrandon.potter@amd.com{ 199811385Sbrandon.potter@amd.com return mmapImpl<OS>(desc, num, p, tc, true); 199911385Sbrandon.potter@amd.com} 200011385Sbrandon.potter@amd.com 2001378SN/A/// Target getrlimit() handler. 2002360SN/Atemplate <class OS> 20031450SN/ASyscallReturn 200411851Sbrandon.potter@amd.comgetrlimitFunc(SyscallDesc *desc, int callnum, Process *process, 200511851Sbrandon.potter@amd.com ThreadContext *tc) 2006360SN/A{ 20076701Sgblack@eecs.umich.edu int index = 0; 20086701Sgblack@eecs.umich.edu unsigned resource = process->getSyscallArg(tc, index); 20096701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::rlimit> rlp(process->getSyscallArg(tc, index)); 2010360SN/A 2011360SN/A switch (resource) { 201211906SBrandon.Potter@amd.com case OS::TGT_RLIMIT_STACK: 201311906SBrandon.Potter@amd.com // max stack size in bytes: make up a number (8MB for now) 201411906SBrandon.Potter@amd.com rlp->rlim_cur = rlp->rlim_max = 8 * 1024 * 1024; 201511906SBrandon.Potter@amd.com rlp->rlim_cur = TheISA::htog(rlp->rlim_cur); 201611906SBrandon.Potter@amd.com rlp->rlim_max = TheISA::htog(rlp->rlim_max); 201711906SBrandon.Potter@amd.com break; 2018360SN/A 201911906SBrandon.Potter@amd.com case OS::TGT_RLIMIT_DATA: 202011906SBrandon.Potter@amd.com // max data segment size in bytes: make up a number 202111906SBrandon.Potter@amd.com rlp->rlim_cur = rlp->rlim_max = 256 * 1024 * 1024; 202211906SBrandon.Potter@amd.com rlp->rlim_cur = TheISA::htog(rlp->rlim_cur); 202311906SBrandon.Potter@amd.com rlp->rlim_max = TheISA::htog(rlp->rlim_max); 202411906SBrandon.Potter@amd.com break; 20255877Shsul@eecs.umich.edu 202611906SBrandon.Potter@amd.com default: 202711906SBrandon.Potter@amd.com warn("getrlimit: unimplemented resource %d", resource); 202811906SBrandon.Potter@amd.com return -EINVAL; 202911906SBrandon.Potter@amd.com break; 2030360SN/A } 2031360SN/A 20328706Sandreas.hansson@arm.com rlp.copyOut(tc->getMemProxy()); 20331458SN/A return 0; 2034360SN/A} 2035360SN/A 203612235Sar4jc@virginia.edutemplate <class OS> 203712235Sar4jc@virginia.eduSyscallReturn 203812235Sar4jc@virginia.eduprlimitFunc(SyscallDesc *desc, int callnum, Process *process, 203912235Sar4jc@virginia.edu ThreadContext *tc) 204012235Sar4jc@virginia.edu{ 204112235Sar4jc@virginia.edu int index = 0; 204212235Sar4jc@virginia.edu if (process->getSyscallArg(tc, index) != 0) 204312235Sar4jc@virginia.edu { 204412235Sar4jc@virginia.edu warn("prlimit: ignoring rlimits for nonzero pid"); 204512235Sar4jc@virginia.edu return -EPERM; 204612235Sar4jc@virginia.edu } 204712235Sar4jc@virginia.edu int resource = process->getSyscallArg(tc, index); 204812235Sar4jc@virginia.edu Addr n = process->getSyscallArg(tc, index); 204912235Sar4jc@virginia.edu if (n != 0) 205012235Sar4jc@virginia.edu warn("prlimit: ignoring new rlimit"); 205112235Sar4jc@virginia.edu Addr o = process->getSyscallArg(tc, index); 205212235Sar4jc@virginia.edu if (o != 0) 205312235Sar4jc@virginia.edu { 205412416Sqtt2@cornell.edu TypedBufferArg<typename OS::rlimit> rlp(o); 205512235Sar4jc@virginia.edu switch (resource) { 205612235Sar4jc@virginia.edu case OS::TGT_RLIMIT_STACK: 205712235Sar4jc@virginia.edu // max stack size in bytes: make up a number (8MB for now) 205812235Sar4jc@virginia.edu rlp->rlim_cur = rlp->rlim_max = 8 * 1024 * 1024; 205912235Sar4jc@virginia.edu rlp->rlim_cur = TheISA::htog(rlp->rlim_cur); 206012235Sar4jc@virginia.edu rlp->rlim_max = TheISA::htog(rlp->rlim_max); 206112235Sar4jc@virginia.edu break; 206212235Sar4jc@virginia.edu case OS::TGT_RLIMIT_DATA: 206312235Sar4jc@virginia.edu // max data segment size in bytes: make up a number 206412235Sar4jc@virginia.edu rlp->rlim_cur = rlp->rlim_max = 256*1024*1024; 206512235Sar4jc@virginia.edu rlp->rlim_cur = TheISA::htog(rlp->rlim_cur); 206612235Sar4jc@virginia.edu rlp->rlim_max = TheISA::htog(rlp->rlim_max); 206712593Sjason@lowepower.com break; 206812235Sar4jc@virginia.edu default: 206912235Sar4jc@virginia.edu warn("prlimit: unimplemented resource %d", resource); 207012235Sar4jc@virginia.edu return -EINVAL; 207112235Sar4jc@virginia.edu break; 207212235Sar4jc@virginia.edu } 207312235Sar4jc@virginia.edu rlp.copyOut(tc->getMemProxy()); 207412235Sar4jc@virginia.edu } 207512235Sar4jc@virginia.edu return 0; 207612235Sar4jc@virginia.edu} 207712235Sar4jc@virginia.edu 207810796Sbrandon.potter@amd.com/// Target clock_gettime() function. 207910796Sbrandon.potter@amd.comtemplate <class OS> 208010796Sbrandon.potter@amd.comSyscallReturn 208111851Sbrandon.potter@amd.comclock_gettimeFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 208210796Sbrandon.potter@amd.com{ 208310796Sbrandon.potter@amd.com int index = 1; 208410796Sbrandon.potter@amd.com //int clk_id = p->getSyscallArg(tc, index); 208510796Sbrandon.potter@amd.com TypedBufferArg<typename OS::timespec> tp(p->getSyscallArg(tc, index)); 208610796Sbrandon.potter@amd.com 208710796Sbrandon.potter@amd.com getElapsedTimeNano(tp->tv_sec, tp->tv_nsec); 208810796Sbrandon.potter@amd.com tp->tv_sec += seconds_since_epoch; 208910796Sbrandon.potter@amd.com tp->tv_sec = TheISA::htog(tp->tv_sec); 209010796Sbrandon.potter@amd.com tp->tv_nsec = TheISA::htog(tp->tv_nsec); 209110796Sbrandon.potter@amd.com 209210796Sbrandon.potter@amd.com tp.copyOut(tc->getMemProxy()); 209310796Sbrandon.potter@amd.com 209410796Sbrandon.potter@amd.com return 0; 209510796Sbrandon.potter@amd.com} 209610796Sbrandon.potter@amd.com 209711337SMichael.Lebeane@amd.com/// Target clock_getres() function. 209811337SMichael.Lebeane@amd.comtemplate <class OS> 209911337SMichael.Lebeane@amd.comSyscallReturn 210011851Sbrandon.potter@amd.comclock_getresFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 210111337SMichael.Lebeane@amd.com{ 210211337SMichael.Lebeane@amd.com int index = 1; 210311337SMichael.Lebeane@amd.com TypedBufferArg<typename OS::timespec> tp(p->getSyscallArg(tc, index)); 210411337SMichael.Lebeane@amd.com 210511337SMichael.Lebeane@amd.com // Set resolution at ns, which is what clock_gettime() returns 210611337SMichael.Lebeane@amd.com tp->tv_sec = 0; 210711337SMichael.Lebeane@amd.com tp->tv_nsec = 1; 210811337SMichael.Lebeane@amd.com 210911337SMichael.Lebeane@amd.com tp.copyOut(tc->getMemProxy()); 211011337SMichael.Lebeane@amd.com 211111337SMichael.Lebeane@amd.com return 0; 211211337SMichael.Lebeane@amd.com} 211311337SMichael.Lebeane@amd.com 2114378SN/A/// Target gettimeofday() handler. 2115360SN/Atemplate <class OS> 21161450SN/ASyscallReturn 211711851Sbrandon.potter@amd.comgettimeofdayFunc(SyscallDesc *desc, int callnum, Process *process, 211811851Sbrandon.potter@amd.com ThreadContext *tc) 2119360SN/A{ 21206701Sgblack@eecs.umich.edu int index = 0; 21216701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::timeval> tp(process->getSyscallArg(tc, index)); 2122360SN/A 212310796Sbrandon.potter@amd.com getElapsedTimeMicro(tp->tv_sec, tp->tv_usec); 2124360SN/A tp->tv_sec += seconds_since_epoch; 21256109Ssanchezd@stanford.edu tp->tv_sec = TheISA::htog(tp->tv_sec); 21266109Ssanchezd@stanford.edu tp->tv_usec = TheISA::htog(tp->tv_usec); 2127360SN/A 21288706Sandreas.hansson@arm.com tp.copyOut(tc->getMemProxy()); 2129360SN/A 21301458SN/A return 0; 2131360SN/A} 2132360SN/A 2133360SN/A 21341999SN/A/// Target utimes() handler. 21351999SN/Atemplate <class OS> 21361999SN/ASyscallReturn 213711851Sbrandon.potter@amd.comutimesFunc(SyscallDesc *desc, int callnum, Process *process, 21382680Sktlim@umich.edu ThreadContext *tc) 21391999SN/A{ 21401999SN/A std::string path; 21411999SN/A 21426701Sgblack@eecs.umich.edu int index = 0; 21438852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 21446701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 21456701Sgblack@eecs.umich.edu return -EFAULT; 21466701Sgblack@eecs.umich.edu } 21471999SN/A 21486701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::timeval [2]> 21496701Sgblack@eecs.umich.edu tp(process->getSyscallArg(tc, index)); 21508706Sandreas.hansson@arm.com tp.copyIn(tc->getMemProxy()); 21511999SN/A 21521999SN/A struct timeval hostTimeval[2]; 215311906SBrandon.Potter@amd.com for (int i = 0; i < 2; ++i) { 21548737Skoansin.tan@gmail.com hostTimeval[i].tv_sec = TheISA::gtoh((*tp)[i].tv_sec); 21558737Skoansin.tan@gmail.com hostTimeval[i].tv_usec = TheISA::gtoh((*tp)[i].tv_usec); 21561999SN/A } 21573669Sbinkertn@umich.edu 215813883Sdavid.hashe@amd.com // Adjust path for cwd and redirection 215913883Sdavid.hashe@amd.com path = process->checkPathRedirect(path); 21603669Sbinkertn@umich.edu 21611999SN/A int result = utimes(path.c_str(), hostTimeval); 21621999SN/A 21631999SN/A if (result < 0) 21641999SN/A return -errno; 21651999SN/A 21661999SN/A return 0; 21671999SN/A} 216811886Sbrandon.potter@amd.com 216911886Sbrandon.potter@amd.comtemplate <class OS> 217011886Sbrandon.potter@amd.comSyscallReturn 217111886Sbrandon.potter@amd.comexecveFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 217211886Sbrandon.potter@amd.com{ 217311886Sbrandon.potter@amd.com desc->setFlags(0); 217411886Sbrandon.potter@amd.com 217511886Sbrandon.potter@amd.com int index = 0; 217611886Sbrandon.potter@amd.com std::string path; 217711886Sbrandon.potter@amd.com SETranslatingPortProxy & mem_proxy = tc->getMemProxy(); 217811886Sbrandon.potter@amd.com if (!mem_proxy.tryReadString(path, p->getSyscallArg(tc, index))) 217911886Sbrandon.potter@amd.com return -EFAULT; 218011886Sbrandon.potter@amd.com 218111886Sbrandon.potter@amd.com if (access(path.c_str(), F_OK) == -1) 218211886Sbrandon.potter@amd.com return -EACCES; 218311886Sbrandon.potter@amd.com 218411886Sbrandon.potter@amd.com auto read_in = [](std::vector<std::string> & vect, 218511886Sbrandon.potter@amd.com SETranslatingPortProxy & mem_proxy, 218611886Sbrandon.potter@amd.com Addr mem_loc) 218711886Sbrandon.potter@amd.com { 218811886Sbrandon.potter@amd.com for (int inc = 0; ; inc++) { 218911886Sbrandon.potter@amd.com BufferArg b((mem_loc + sizeof(Addr) * inc), sizeof(Addr)); 219011886Sbrandon.potter@amd.com b.copyIn(mem_proxy); 219111886Sbrandon.potter@amd.com 219211886Sbrandon.potter@amd.com if (!*(Addr*)b.bufferPtr()) 219311886Sbrandon.potter@amd.com break; 219411886Sbrandon.potter@amd.com 219511886Sbrandon.potter@amd.com vect.push_back(std::string()); 219611886Sbrandon.potter@amd.com mem_proxy.tryReadString(vect[inc], *(Addr*)b.bufferPtr()); 219711886Sbrandon.potter@amd.com } 219811886Sbrandon.potter@amd.com }; 219911886Sbrandon.potter@amd.com 220011886Sbrandon.potter@amd.com /** 220111886Sbrandon.potter@amd.com * Note that ProcessParams is generated by swig and there are no other 220211886Sbrandon.potter@amd.com * examples of how to create anything but this default constructor. The 220311886Sbrandon.potter@amd.com * fields are manually initialized instead of passing parameters to the 220411886Sbrandon.potter@amd.com * constructor. 220511886Sbrandon.potter@amd.com */ 220611886Sbrandon.potter@amd.com ProcessParams *pp = new ProcessParams(); 220711886Sbrandon.potter@amd.com pp->executable = path; 220811886Sbrandon.potter@amd.com Addr argv_mem_loc = p->getSyscallArg(tc, index); 220911886Sbrandon.potter@amd.com read_in(pp->cmd, mem_proxy, argv_mem_loc); 221011886Sbrandon.potter@amd.com Addr envp_mem_loc = p->getSyscallArg(tc, index); 221111886Sbrandon.potter@amd.com read_in(pp->env, mem_proxy, envp_mem_loc); 221211886Sbrandon.potter@amd.com pp->uid = p->uid(); 221311886Sbrandon.potter@amd.com pp->egid = p->egid(); 221411886Sbrandon.potter@amd.com pp->euid = p->euid(); 221511886Sbrandon.potter@amd.com pp->gid = p->gid(); 221611886Sbrandon.potter@amd.com pp->ppid = p->ppid(); 221711886Sbrandon.potter@amd.com pp->pid = p->pid(); 221811886Sbrandon.potter@amd.com pp->input.assign("cin"); 221911886Sbrandon.potter@amd.com pp->output.assign("cout"); 222011886Sbrandon.potter@amd.com pp->errout.assign("cerr"); 222113883Sdavid.hashe@amd.com pp->cwd.assign(p->tgtCwd); 222211886Sbrandon.potter@amd.com pp->system = p->system; 222311886Sbrandon.potter@amd.com /** 222411886Sbrandon.potter@amd.com * Prevent process object creation with identical PIDs (which will trip 222511886Sbrandon.potter@amd.com * a fatal check in Process constructor). The execve call is supposed to 222611886Sbrandon.potter@amd.com * take over the currently executing process' identity but replace 222711886Sbrandon.potter@amd.com * whatever it is doing with a new process image. Instead of hijacking 222811886Sbrandon.potter@amd.com * the process object in the simulator, we create a new process object 222911886Sbrandon.potter@amd.com * and bind to the previous process' thread below (hijacking the thread). 223011886Sbrandon.potter@amd.com */ 223111886Sbrandon.potter@amd.com p->system->PIDs.erase(p->pid()); 223211886Sbrandon.potter@amd.com Process *new_p = pp->create(); 223311886Sbrandon.potter@amd.com delete pp; 223411886Sbrandon.potter@amd.com 223511886Sbrandon.potter@amd.com /** 223611886Sbrandon.potter@amd.com * Work through the file descriptor array and close any files marked 223711886Sbrandon.potter@amd.com * close-on-exec. 223811886Sbrandon.potter@amd.com */ 223911886Sbrandon.potter@amd.com new_p->fds = p->fds; 224011886Sbrandon.potter@amd.com for (int i = 0; i < new_p->fds->getSize(); i++) { 224111886Sbrandon.potter@amd.com std::shared_ptr<FDEntry> fdep = (*new_p->fds)[i]; 224211886Sbrandon.potter@amd.com if (fdep && fdep->getCOE()) 224311886Sbrandon.potter@amd.com new_p->fds->closeFDEntry(i); 224411886Sbrandon.potter@amd.com } 224511886Sbrandon.potter@amd.com 224611886Sbrandon.potter@amd.com *new_p->sigchld = true; 224711886Sbrandon.potter@amd.com 224811886Sbrandon.potter@amd.com delete p; 224911886Sbrandon.potter@amd.com tc->clearArchRegs(); 225011886Sbrandon.potter@amd.com tc->setProcessPtr(new_p); 225111886Sbrandon.potter@amd.com new_p->assignThreadContext(tc->contextId()); 225211886Sbrandon.potter@amd.com new_p->initState(); 225311886Sbrandon.potter@amd.com tc->activate(); 225411886Sbrandon.potter@amd.com TheISA::PCState pcState = tc->pcState(); 225511886Sbrandon.potter@amd.com tc->setNPC(pcState.instAddr()); 225611886Sbrandon.potter@amd.com 225711886Sbrandon.potter@amd.com desc->setFlags(SyscallDesc::SuppressReturnValue); 225811886Sbrandon.potter@amd.com return 0; 225911886Sbrandon.potter@amd.com} 226011886Sbrandon.potter@amd.com 2261378SN/A/// Target getrusage() function. 2262360SN/Atemplate <class OS> 22631450SN/ASyscallReturn 226411851Sbrandon.potter@amd.comgetrusageFunc(SyscallDesc *desc, int callnum, Process *process, 22652680Sktlim@umich.edu ThreadContext *tc) 2266360SN/A{ 22676701Sgblack@eecs.umich.edu int index = 0; 22686701Sgblack@eecs.umich.edu int who = process->getSyscallArg(tc, index); // THREAD, SELF, or CHILDREN 22696701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::rusage> rup(process->getSyscallArg(tc, index)); 2270360SN/A 22713670Sbinkertn@umich.edu rup->ru_utime.tv_sec = 0; 22723670Sbinkertn@umich.edu rup->ru_utime.tv_usec = 0; 2273360SN/A rup->ru_stime.tv_sec = 0; 2274360SN/A rup->ru_stime.tv_usec = 0; 2275360SN/A rup->ru_maxrss = 0; 2276360SN/A rup->ru_ixrss = 0; 2277360SN/A rup->ru_idrss = 0; 2278360SN/A rup->ru_isrss = 0; 2279360SN/A rup->ru_minflt = 0; 2280360SN/A rup->ru_majflt = 0; 2281360SN/A rup->ru_nswap = 0; 2282360SN/A rup->ru_inblock = 0; 2283360SN/A rup->ru_oublock = 0; 2284360SN/A rup->ru_msgsnd = 0; 2285360SN/A rup->ru_msgrcv = 0; 2286360SN/A rup->ru_nsignals = 0; 2287360SN/A rup->ru_nvcsw = 0; 2288360SN/A rup->ru_nivcsw = 0; 2289360SN/A 22903670Sbinkertn@umich.edu switch (who) { 22913670Sbinkertn@umich.edu case OS::TGT_RUSAGE_SELF: 229210796Sbrandon.potter@amd.com getElapsedTimeMicro(rup->ru_utime.tv_sec, rup->ru_utime.tv_usec); 22938737Skoansin.tan@gmail.com rup->ru_utime.tv_sec = TheISA::htog(rup->ru_utime.tv_sec); 22948737Skoansin.tan@gmail.com rup->ru_utime.tv_usec = TheISA::htog(rup->ru_utime.tv_usec); 22953670Sbinkertn@umich.edu break; 22963670Sbinkertn@umich.edu 22973670Sbinkertn@umich.edu case OS::TGT_RUSAGE_CHILDREN: 22983670Sbinkertn@umich.edu // do nothing. We have no child processes, so they take no time. 22993670Sbinkertn@umich.edu break; 23003670Sbinkertn@umich.edu 23013670Sbinkertn@umich.edu default: 23023670Sbinkertn@umich.edu // don't really handle THREAD or CHILDREN, but just warn and 23033670Sbinkertn@umich.edu // plow ahead 23043670Sbinkertn@umich.edu warn("getrusage() only supports RUSAGE_SELF. Parameter %d ignored.", 23053670Sbinkertn@umich.edu who); 23063670Sbinkertn@umich.edu } 23073670Sbinkertn@umich.edu 23088706Sandreas.hansson@arm.com rup.copyOut(tc->getMemProxy()); 2309360SN/A 23101458SN/A return 0; 2311360SN/A} 2312360SN/A 23136683Stjones1@inf.ed.ac.uk/// Target times() function. 23146683Stjones1@inf.ed.ac.uktemplate <class OS> 23156683Stjones1@inf.ed.ac.ukSyscallReturn 231611851Sbrandon.potter@amd.comtimesFunc(SyscallDesc *desc, int callnum, Process *process, 231711851Sbrandon.potter@amd.com ThreadContext *tc) 23186683Stjones1@inf.ed.ac.uk{ 23196701Sgblack@eecs.umich.edu int index = 0; 23206701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::tms> bufp(process->getSyscallArg(tc, index)); 23216683Stjones1@inf.ed.ac.uk 23226683Stjones1@inf.ed.ac.uk // Fill in the time structure (in clocks) 23237823Ssteve.reinhardt@amd.com int64_t clocks = curTick() * OS::M5_SC_CLK_TCK / SimClock::Int::s; 23246683Stjones1@inf.ed.ac.uk bufp->tms_utime = clocks; 23256683Stjones1@inf.ed.ac.uk bufp->tms_stime = 0; 23266683Stjones1@inf.ed.ac.uk bufp->tms_cutime = 0; 23276683Stjones1@inf.ed.ac.uk bufp->tms_cstime = 0; 23286683Stjones1@inf.ed.ac.uk 23296683Stjones1@inf.ed.ac.uk // Convert to host endianness 23308737Skoansin.tan@gmail.com bufp->tms_utime = TheISA::htog(bufp->tms_utime); 23316683Stjones1@inf.ed.ac.uk 23326683Stjones1@inf.ed.ac.uk // Write back 23338706Sandreas.hansson@arm.com bufp.copyOut(tc->getMemProxy()); 23346683Stjones1@inf.ed.ac.uk 23356683Stjones1@inf.ed.ac.uk // Return clock ticks since system boot 23366683Stjones1@inf.ed.ac.uk return clocks; 23376683Stjones1@inf.ed.ac.uk} 23382553SN/A 23396684Stjones1@inf.ed.ac.uk/// Target time() function. 23406684Stjones1@inf.ed.ac.uktemplate <class OS> 23416684Stjones1@inf.ed.ac.ukSyscallReturn 234211851Sbrandon.potter@amd.comtimeFunc(SyscallDesc *desc, int callnum, Process *process, ThreadContext *tc) 23436684Stjones1@inf.ed.ac.uk{ 23446684Stjones1@inf.ed.ac.uk typename OS::time_t sec, usec; 234510796Sbrandon.potter@amd.com getElapsedTimeMicro(sec, usec); 23466684Stjones1@inf.ed.ac.uk sec += seconds_since_epoch; 23476684Stjones1@inf.ed.ac.uk 23486701Sgblack@eecs.umich.edu int index = 0; 23496701Sgblack@eecs.umich.edu Addr taddr = (Addr)process->getSyscallArg(tc, index); 235011321Ssteve.reinhardt@amd.com if (taddr != 0) { 23516684Stjones1@inf.ed.ac.uk typename OS::time_t t = sec; 23528737Skoansin.tan@gmail.com t = TheISA::htog(t); 23538852Sandreas.hansson@arm.com SETranslatingPortProxy &p = tc->getMemProxy(); 23548852Sandreas.hansson@arm.com p.writeBlob(taddr, (uint8_t*)&t, (int)sizeof(typename OS::time_t)); 23556684Stjones1@inf.ed.ac.uk } 23566684Stjones1@inf.ed.ac.uk return sec; 23576684Stjones1@inf.ed.ac.uk} 23582553SN/A 235911910SBrandon.Potter@amd.comtemplate <class OS> 236011910SBrandon.Potter@amd.comSyscallReturn 236111910SBrandon.Potter@amd.comtgkillFunc(SyscallDesc *desc, int num, Process *process, ThreadContext *tc) 236211910SBrandon.Potter@amd.com{ 236311910SBrandon.Potter@amd.com int index = 0; 236411910SBrandon.Potter@amd.com int tgid = process->getSyscallArg(tc, index); 236511910SBrandon.Potter@amd.com int tid = process->getSyscallArg(tc, index); 236611910SBrandon.Potter@amd.com int sig = process->getSyscallArg(tc, index); 236711910SBrandon.Potter@amd.com 236811910SBrandon.Potter@amd.com /** 236911910SBrandon.Potter@amd.com * This system call is intended to allow killing a specific thread 237011910SBrandon.Potter@amd.com * within an arbitrary thread group if sanctioned with permission checks. 237111910SBrandon.Potter@amd.com * It's usually true that threads share the termination signal as pointed 237211910SBrandon.Potter@amd.com * out by the pthread_kill man page and this seems to be the intended 237311910SBrandon.Potter@amd.com * usage. Due to this being an emulated environment, assume the following: 237411910SBrandon.Potter@amd.com * Threads are allowed to call tgkill because the EUID for all threads 237511910SBrandon.Potter@amd.com * should be the same. There is no signal handling mechanism for kernel 237611910SBrandon.Potter@amd.com * registration of signal handlers since signals are poorly supported in 237711910SBrandon.Potter@amd.com * emulation mode. Since signal handlers cannot be registered, all 237811910SBrandon.Potter@amd.com * threads within in a thread group must share the termination signal. 237911910SBrandon.Potter@amd.com * We never exhaust PIDs so there's no chance of finding the wrong one 238011910SBrandon.Potter@amd.com * due to PID rollover. 238111910SBrandon.Potter@amd.com */ 238211910SBrandon.Potter@amd.com 238311910SBrandon.Potter@amd.com System *sys = tc->getSystemPtr(); 238411910SBrandon.Potter@amd.com Process *tgt_proc = nullptr; 238511910SBrandon.Potter@amd.com for (int i = 0; i < sys->numContexts(); i++) { 238611910SBrandon.Potter@amd.com Process *temp = sys->threadContexts[i]->getProcessPtr(); 238711910SBrandon.Potter@amd.com if (temp->pid() == tid) { 238811910SBrandon.Potter@amd.com tgt_proc = temp; 238911910SBrandon.Potter@amd.com break; 239011910SBrandon.Potter@amd.com } 239111910SBrandon.Potter@amd.com } 239211910SBrandon.Potter@amd.com 239311910SBrandon.Potter@amd.com if (sig != 0 || sig != OS::TGT_SIGABRT) 239411910SBrandon.Potter@amd.com return -EINVAL; 239511910SBrandon.Potter@amd.com 239611910SBrandon.Potter@amd.com if (tgt_proc == nullptr) 239711910SBrandon.Potter@amd.com return -ESRCH; 239811910SBrandon.Potter@amd.com 239911910SBrandon.Potter@amd.com if (tgid != -1 && tgt_proc->tgid() != tgid) 240011910SBrandon.Potter@amd.com return -ESRCH; 240111910SBrandon.Potter@amd.com 240211910SBrandon.Potter@amd.com if (sig == OS::TGT_SIGABRT) 240311910SBrandon.Potter@amd.com exitGroupFunc(desc, 252, process, tc); 240411910SBrandon.Potter@amd.com 240511910SBrandon.Potter@amd.com return 0; 240611910SBrandon.Potter@amd.com} 240711910SBrandon.Potter@amd.com 240813568Sbrandon.potter@amd.comtemplate <class OS> 240913568Sbrandon.potter@amd.comSyscallReturn 241013568Sbrandon.potter@amd.comsocketFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 241113568Sbrandon.potter@amd.com{ 241213568Sbrandon.potter@amd.com int index = 0; 241313568Sbrandon.potter@amd.com int domain = p->getSyscallArg(tc, index); 241413568Sbrandon.potter@amd.com int type = p->getSyscallArg(tc, index); 241513568Sbrandon.potter@amd.com int prot = p->getSyscallArg(tc, index); 241613568Sbrandon.potter@amd.com 241713568Sbrandon.potter@amd.com int sim_fd = socket(domain, type, prot); 241813568Sbrandon.potter@amd.com if (sim_fd == -1) 241913568Sbrandon.potter@amd.com return -errno; 242013568Sbrandon.potter@amd.com 242113568Sbrandon.potter@amd.com auto sfdp = std::make_shared<SocketFDEntry>(sim_fd, domain, type, prot); 242213568Sbrandon.potter@amd.com int tgt_fd = p->fds->allocFD(sfdp); 242313568Sbrandon.potter@amd.com 242413568Sbrandon.potter@amd.com return tgt_fd; 242513568Sbrandon.potter@amd.com} 242613568Sbrandon.potter@amd.com 242713568Sbrandon.potter@amd.comtemplate <class OS> 242813568Sbrandon.potter@amd.comSyscallReturn 242913568Sbrandon.potter@amd.comsocketpairFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 243013568Sbrandon.potter@amd.com{ 243113568Sbrandon.potter@amd.com int index = 0; 243213568Sbrandon.potter@amd.com int domain = p->getSyscallArg(tc, index); 243313568Sbrandon.potter@amd.com int type = p->getSyscallArg(tc, index); 243413568Sbrandon.potter@amd.com int prot = p->getSyscallArg(tc, index); 243513568Sbrandon.potter@amd.com Addr svPtr = p->getSyscallArg(tc, index); 243613568Sbrandon.potter@amd.com 243713568Sbrandon.potter@amd.com BufferArg svBuf((Addr)svPtr, 2 * sizeof(int)); 243813568Sbrandon.potter@amd.com int status = socketpair(domain, type, prot, (int *)svBuf.bufferPtr()); 243913568Sbrandon.potter@amd.com if (status == -1) 244013568Sbrandon.potter@amd.com return -errno; 244113568Sbrandon.potter@amd.com 244213568Sbrandon.potter@amd.com int *fds = (int *)svBuf.bufferPtr(); 244313568Sbrandon.potter@amd.com 244413568Sbrandon.potter@amd.com auto sfdp1 = std::make_shared<SocketFDEntry>(fds[0], domain, type, prot); 244513568Sbrandon.potter@amd.com fds[0] = p->fds->allocFD(sfdp1); 244613568Sbrandon.potter@amd.com auto sfdp2 = std::make_shared<SocketFDEntry>(fds[1], domain, type, prot); 244713568Sbrandon.potter@amd.com fds[1] = p->fds->allocFD(sfdp2); 244813568Sbrandon.potter@amd.com svBuf.copyOut(tc->getMemProxy()); 244913568Sbrandon.potter@amd.com 245013568Sbrandon.potter@amd.com return status; 245113568Sbrandon.potter@amd.com} 24522553SN/A 245313570Sbrandon.potter@amd.comtemplate <class OS> 245413570Sbrandon.potter@amd.comSyscallReturn 245513570Sbrandon.potter@amd.comselectFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 245613570Sbrandon.potter@amd.com{ 245713570Sbrandon.potter@amd.com int retval; 245813570Sbrandon.potter@amd.com 245913570Sbrandon.potter@amd.com int index = 0; 246013570Sbrandon.potter@amd.com int nfds_t = p->getSyscallArg(tc, index); 246113570Sbrandon.potter@amd.com Addr fds_read_ptr = p->getSyscallArg(tc, index); 246213570Sbrandon.potter@amd.com Addr fds_writ_ptr = p->getSyscallArg(tc, index); 246313570Sbrandon.potter@amd.com Addr fds_excp_ptr = p->getSyscallArg(tc, index); 246413570Sbrandon.potter@amd.com Addr time_val_ptr = p->getSyscallArg(tc, index); 246513570Sbrandon.potter@amd.com 246613570Sbrandon.potter@amd.com TypedBufferArg<typename OS::fd_set> rd_t(fds_read_ptr); 246713570Sbrandon.potter@amd.com TypedBufferArg<typename OS::fd_set> wr_t(fds_writ_ptr); 246813570Sbrandon.potter@amd.com TypedBufferArg<typename OS::fd_set> ex_t(fds_excp_ptr); 246913570Sbrandon.potter@amd.com TypedBufferArg<typename OS::timeval> tp(time_val_ptr); 247013570Sbrandon.potter@amd.com 247113570Sbrandon.potter@amd.com /** 247213570Sbrandon.potter@amd.com * Host fields. Notice that these use the definitions from the system 247313570Sbrandon.potter@amd.com * headers instead of the gem5 headers and libraries. If the host and 247413570Sbrandon.potter@amd.com * target have different header file definitions, this will not work. 247513570Sbrandon.potter@amd.com */ 247613570Sbrandon.potter@amd.com fd_set rd_h; 247713570Sbrandon.potter@amd.com FD_ZERO(&rd_h); 247813570Sbrandon.potter@amd.com fd_set wr_h; 247913570Sbrandon.potter@amd.com FD_ZERO(&wr_h); 248013570Sbrandon.potter@amd.com fd_set ex_h; 248113570Sbrandon.potter@amd.com FD_ZERO(&ex_h); 248213570Sbrandon.potter@amd.com 248313570Sbrandon.potter@amd.com /** 248413570Sbrandon.potter@amd.com * Copy in the fd_set from the target. 248513570Sbrandon.potter@amd.com */ 248613570Sbrandon.potter@amd.com if (fds_read_ptr) 248713570Sbrandon.potter@amd.com rd_t.copyIn(tc->getMemProxy()); 248813570Sbrandon.potter@amd.com if (fds_writ_ptr) 248913570Sbrandon.potter@amd.com wr_t.copyIn(tc->getMemProxy()); 249013570Sbrandon.potter@amd.com if (fds_excp_ptr) 249113570Sbrandon.potter@amd.com ex_t.copyIn(tc->getMemProxy()); 249213570Sbrandon.potter@amd.com 249313570Sbrandon.potter@amd.com /** 249413570Sbrandon.potter@amd.com * We need to translate the target file descriptor set into a host file 249513570Sbrandon.potter@amd.com * descriptor set. This involves both our internal process fd array 249613570Sbrandon.potter@amd.com * and the fd_set defined in Linux header files. The nfds field also 249713570Sbrandon.potter@amd.com * needs to be updated as it will be only target specific after 249813570Sbrandon.potter@amd.com * retrieving it from the target; the nfds value is expected to be the 249913570Sbrandon.potter@amd.com * highest file descriptor that needs to be checked, so we need to extend 250013570Sbrandon.potter@amd.com * it out for nfds_h when we do the update. 250113570Sbrandon.potter@amd.com */ 250213570Sbrandon.potter@amd.com int nfds_h = 0; 250313570Sbrandon.potter@amd.com std::map<int, int> trans_map; 250413570Sbrandon.potter@amd.com auto try_add_host_set = [&](fd_set *tgt_set_entry, 250513570Sbrandon.potter@amd.com fd_set *hst_set_entry, 250613570Sbrandon.potter@amd.com int iter) -> bool 250713570Sbrandon.potter@amd.com { 250813570Sbrandon.potter@amd.com /** 250913570Sbrandon.potter@amd.com * By this point, we know that we are looking at a valid file 251013570Sbrandon.potter@amd.com * descriptor set on the target. We need to check if the target file 251113570Sbrandon.potter@amd.com * descriptor value passed in as iter is part of the set. 251213570Sbrandon.potter@amd.com */ 251313570Sbrandon.potter@amd.com if (FD_ISSET(iter, tgt_set_entry)) { 251413570Sbrandon.potter@amd.com /** 251513570Sbrandon.potter@amd.com * We know that the target file descriptor belongs to the set, 251613570Sbrandon.potter@amd.com * but we do not yet know if the file descriptor is valid or 251713570Sbrandon.potter@amd.com * that we have a host mapping. Check that now. 251813570Sbrandon.potter@amd.com */ 251913570Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[iter]); 252013570Sbrandon.potter@amd.com if (!hbfdp) 252113570Sbrandon.potter@amd.com return true; 252213570Sbrandon.potter@amd.com auto sim_fd = hbfdp->getSimFD(); 252313570Sbrandon.potter@amd.com 252413570Sbrandon.potter@amd.com /** 252513570Sbrandon.potter@amd.com * Add the sim_fd to tgt_fd translation into trans_map for use 252613570Sbrandon.potter@amd.com * later when we need to zero the target fd_set structures and 252713570Sbrandon.potter@amd.com * then update them with hits returned from the host select call. 252813570Sbrandon.potter@amd.com */ 252913570Sbrandon.potter@amd.com trans_map[sim_fd] = iter; 253013570Sbrandon.potter@amd.com 253113570Sbrandon.potter@amd.com /** 253213570Sbrandon.potter@amd.com * We know that the host file descriptor exists so now we check 253313570Sbrandon.potter@amd.com * if we need to update the max count for nfds_h before passing 253413570Sbrandon.potter@amd.com * the duplicated structure into the host. 253513570Sbrandon.potter@amd.com */ 253613570Sbrandon.potter@amd.com nfds_h = std::max(nfds_h - 1, sim_fd + 1); 253713570Sbrandon.potter@amd.com 253813570Sbrandon.potter@amd.com /** 253913570Sbrandon.potter@amd.com * Add the host file descriptor to the set that we are going to 254013570Sbrandon.potter@amd.com * pass into the host. 254113570Sbrandon.potter@amd.com */ 254213570Sbrandon.potter@amd.com FD_SET(sim_fd, hst_set_entry); 254313570Sbrandon.potter@amd.com } 254413570Sbrandon.potter@amd.com return false; 254513570Sbrandon.potter@amd.com }; 254613570Sbrandon.potter@amd.com 254713570Sbrandon.potter@amd.com for (int i = 0; i < nfds_t; i++) { 254813570Sbrandon.potter@amd.com if (fds_read_ptr) { 254913570Sbrandon.potter@amd.com bool ebadf = try_add_host_set((fd_set*)&*rd_t, &rd_h, i); 255013570Sbrandon.potter@amd.com if (ebadf) return -EBADF; 255113570Sbrandon.potter@amd.com } 255213570Sbrandon.potter@amd.com if (fds_writ_ptr) { 255313570Sbrandon.potter@amd.com bool ebadf = try_add_host_set((fd_set*)&*wr_t, &wr_h, i); 255413570Sbrandon.potter@amd.com if (ebadf) return -EBADF; 255513570Sbrandon.potter@amd.com } 255613570Sbrandon.potter@amd.com if (fds_excp_ptr) { 255713570Sbrandon.potter@amd.com bool ebadf = try_add_host_set((fd_set*)&*ex_t, &ex_h, i); 255813570Sbrandon.potter@amd.com if (ebadf) return -EBADF; 255913570Sbrandon.potter@amd.com } 256013570Sbrandon.potter@amd.com } 256113570Sbrandon.potter@amd.com 256213570Sbrandon.potter@amd.com if (time_val_ptr) { 256313570Sbrandon.potter@amd.com /** 256413570Sbrandon.potter@amd.com * It might be possible to decrement the timeval based on some 256513570Sbrandon.potter@amd.com * derivation of wall clock determined from elapsed simulator ticks 256613570Sbrandon.potter@amd.com * but that seems like overkill. Rather, we just set the timeval with 256713570Sbrandon.potter@amd.com * zero timeout. (There is no reason to block during the simulation 256813570Sbrandon.potter@amd.com * as it only decreases simulator performance.) 256913570Sbrandon.potter@amd.com */ 257013570Sbrandon.potter@amd.com tp->tv_sec = 0; 257113570Sbrandon.potter@amd.com tp->tv_usec = 0; 257213570Sbrandon.potter@amd.com 257313570Sbrandon.potter@amd.com retval = select(nfds_h, 257413570Sbrandon.potter@amd.com fds_read_ptr ? &rd_h : nullptr, 257513570Sbrandon.potter@amd.com fds_writ_ptr ? &wr_h : nullptr, 257613570Sbrandon.potter@amd.com fds_excp_ptr ? &ex_h : nullptr, 257713570Sbrandon.potter@amd.com (timeval*)&*tp); 257813570Sbrandon.potter@amd.com } else { 257913570Sbrandon.potter@amd.com /** 258013570Sbrandon.potter@amd.com * If the timeval pointer is null, setup a new timeval structure to 258113570Sbrandon.potter@amd.com * pass into the host select call. Unfortunately, we will need to 258213570Sbrandon.potter@amd.com * manually check the return value and throw a retry fault if the 258313570Sbrandon.potter@amd.com * return value is zero. Allowing the system call to block will 258413570Sbrandon.potter@amd.com * likely deadlock the event queue. 258513570Sbrandon.potter@amd.com */ 258613570Sbrandon.potter@amd.com struct timeval tv = { 0, 0 }; 258713570Sbrandon.potter@amd.com 258813570Sbrandon.potter@amd.com retval = select(nfds_h, 258913570Sbrandon.potter@amd.com fds_read_ptr ? &rd_h : nullptr, 259013570Sbrandon.potter@amd.com fds_writ_ptr ? &wr_h : nullptr, 259113570Sbrandon.potter@amd.com fds_excp_ptr ? &ex_h : nullptr, 259213570Sbrandon.potter@amd.com &tv); 259313570Sbrandon.potter@amd.com 259413570Sbrandon.potter@amd.com if (retval == 0) { 259513570Sbrandon.potter@amd.com /** 259613570Sbrandon.potter@amd.com * If blocking indefinitely, check the signal list to see if a 259713570Sbrandon.potter@amd.com * signal would break the poll out of the retry cycle and try to 259813570Sbrandon.potter@amd.com * return the signal interrupt instead. 259913570Sbrandon.potter@amd.com */ 260013570Sbrandon.potter@amd.com for (auto sig : tc->getSystemPtr()->signalList) 260113570Sbrandon.potter@amd.com if (sig.receiver == p) 260213570Sbrandon.potter@amd.com return -EINTR; 260313570Sbrandon.potter@amd.com return SyscallReturn::retry(); 260413570Sbrandon.potter@amd.com } 260513570Sbrandon.potter@amd.com } 260613570Sbrandon.potter@amd.com 260713570Sbrandon.potter@amd.com if (retval == -1) 260813570Sbrandon.potter@amd.com return -errno; 260913570Sbrandon.potter@amd.com 261013570Sbrandon.potter@amd.com FD_ZERO((fd_set*)&*rd_t); 261113570Sbrandon.potter@amd.com FD_ZERO((fd_set*)&*wr_t); 261213570Sbrandon.potter@amd.com FD_ZERO((fd_set*)&*ex_t); 261313570Sbrandon.potter@amd.com 261413570Sbrandon.potter@amd.com /** 261513570Sbrandon.potter@amd.com * We need to translate the host file descriptor set into a target file 261613570Sbrandon.potter@amd.com * descriptor set. This involves both our internal process fd array 261713570Sbrandon.potter@amd.com * and the fd_set defined in header files. 261813570Sbrandon.potter@amd.com */ 261913570Sbrandon.potter@amd.com for (int i = 0; i < nfds_h; i++) { 262013570Sbrandon.potter@amd.com if (fds_read_ptr) { 262113570Sbrandon.potter@amd.com if (FD_ISSET(i, &rd_h)) 262213570Sbrandon.potter@amd.com FD_SET(trans_map[i], (fd_set*)&*rd_t); 262313570Sbrandon.potter@amd.com } 262413570Sbrandon.potter@amd.com 262513570Sbrandon.potter@amd.com if (fds_writ_ptr) { 262613570Sbrandon.potter@amd.com if (FD_ISSET(i, &wr_h)) 262713570Sbrandon.potter@amd.com FD_SET(trans_map[i], (fd_set*)&*wr_t); 262813570Sbrandon.potter@amd.com } 262913570Sbrandon.potter@amd.com 263013570Sbrandon.potter@amd.com if (fds_excp_ptr) { 263113570Sbrandon.potter@amd.com if (FD_ISSET(i, &ex_h)) 263213570Sbrandon.potter@amd.com FD_SET(trans_map[i], (fd_set*)&*ex_t); 263313570Sbrandon.potter@amd.com } 263413570Sbrandon.potter@amd.com } 263513570Sbrandon.potter@amd.com 263613570Sbrandon.potter@amd.com if (fds_read_ptr) 263713570Sbrandon.potter@amd.com rd_t.copyOut(tc->getMemProxy()); 263813570Sbrandon.potter@amd.com if (fds_writ_ptr) 263913570Sbrandon.potter@amd.com wr_t.copyOut(tc->getMemProxy()); 264013570Sbrandon.potter@amd.com if (fds_excp_ptr) 264113570Sbrandon.potter@amd.com ex_t.copyOut(tc->getMemProxy()); 264213570Sbrandon.potter@amd.com if (time_val_ptr) 264313570Sbrandon.potter@amd.com tp.copyOut(tc->getMemProxy()); 264413570Sbrandon.potter@amd.com 264513570Sbrandon.potter@amd.com return retval; 264613570Sbrandon.potter@amd.com} 264713570Sbrandon.potter@amd.com 264813570Sbrandon.potter@amd.comtemplate <class OS> 264913570Sbrandon.potter@amd.comSyscallReturn 265013570Sbrandon.potter@amd.comreadFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 265113570Sbrandon.potter@amd.com{ 265213570Sbrandon.potter@amd.com int index = 0; 265313570Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 265413570Sbrandon.potter@amd.com Addr buf_ptr = p->getSyscallArg(tc, index); 265513570Sbrandon.potter@amd.com int nbytes = p->getSyscallArg(tc, index); 265613570Sbrandon.potter@amd.com 265713570Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 265813570Sbrandon.potter@amd.com if (!hbfdp) 265913570Sbrandon.potter@amd.com return -EBADF; 266013570Sbrandon.potter@amd.com int sim_fd = hbfdp->getSimFD(); 266113570Sbrandon.potter@amd.com 266213570Sbrandon.potter@amd.com struct pollfd pfd; 266313570Sbrandon.potter@amd.com pfd.fd = sim_fd; 266413570Sbrandon.potter@amd.com pfd.events = POLLIN | POLLPRI; 266513570Sbrandon.potter@amd.com if ((poll(&pfd, 1, 0) == 0) 266613570Sbrandon.potter@amd.com && !(hbfdp->getFlags() & OS::TGT_O_NONBLOCK)) 266713570Sbrandon.potter@amd.com return SyscallReturn::retry(); 266813570Sbrandon.potter@amd.com 266913570Sbrandon.potter@amd.com BufferArg buf_arg(buf_ptr, nbytes); 267013570Sbrandon.potter@amd.com int bytes_read = read(sim_fd, buf_arg.bufferPtr(), nbytes); 267113570Sbrandon.potter@amd.com 267213570Sbrandon.potter@amd.com if (bytes_read > 0) 267313570Sbrandon.potter@amd.com buf_arg.copyOut(tc->getMemProxy()); 267413570Sbrandon.potter@amd.com 267513570Sbrandon.potter@amd.com return (bytes_read == -1) ? -errno : bytes_read; 267613570Sbrandon.potter@amd.com} 267713570Sbrandon.potter@amd.com 267813570Sbrandon.potter@amd.comtemplate <class OS> 267913570Sbrandon.potter@amd.comSyscallReturn 268013570Sbrandon.potter@amd.comwriteFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 268113570Sbrandon.potter@amd.com{ 268213570Sbrandon.potter@amd.com int index = 0; 268313570Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 268413570Sbrandon.potter@amd.com Addr buf_ptr = p->getSyscallArg(tc, index); 268513570Sbrandon.potter@amd.com int nbytes = p->getSyscallArg(tc, index); 268613570Sbrandon.potter@amd.com 268713570Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 268813570Sbrandon.potter@amd.com if (!hbfdp) 268913570Sbrandon.potter@amd.com return -EBADF; 269013570Sbrandon.potter@amd.com int sim_fd = hbfdp->getSimFD(); 269113570Sbrandon.potter@amd.com 269213570Sbrandon.potter@amd.com BufferArg buf_arg(buf_ptr, nbytes); 269313570Sbrandon.potter@amd.com buf_arg.copyIn(tc->getMemProxy()); 269413570Sbrandon.potter@amd.com 269513570Sbrandon.potter@amd.com struct pollfd pfd; 269613570Sbrandon.potter@amd.com pfd.fd = sim_fd; 269713570Sbrandon.potter@amd.com pfd.events = POLLOUT; 269813570Sbrandon.potter@amd.com 269913570Sbrandon.potter@amd.com /** 270013570Sbrandon.potter@amd.com * We don't want to poll on /dev/random. The kernel will not enable the 270113570Sbrandon.potter@amd.com * file descriptor for writing unless the entropy in the system falls 270213570Sbrandon.potter@amd.com * below write_wakeup_threshold. This is not guaranteed to happen 270313570Sbrandon.potter@amd.com * depending on host settings. 270413570Sbrandon.potter@amd.com */ 270513570Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(hbfdp); 270613570Sbrandon.potter@amd.com if (ffdp && (ffdp->getFileName() != "/dev/random")) { 270713570Sbrandon.potter@amd.com if (!poll(&pfd, 1, 0) && !(ffdp->getFlags() & OS::TGT_O_NONBLOCK)) 270813570Sbrandon.potter@amd.com return SyscallReturn::retry(); 270913570Sbrandon.potter@amd.com } 271013570Sbrandon.potter@amd.com 271113570Sbrandon.potter@amd.com int bytes_written = write(sim_fd, buf_arg.bufferPtr(), nbytes); 271213570Sbrandon.potter@amd.com 271313570Sbrandon.potter@amd.com if (bytes_written != -1) 271413570Sbrandon.potter@amd.com fsync(sim_fd); 271513570Sbrandon.potter@amd.com 271613570Sbrandon.potter@amd.com return (bytes_written == -1) ? -errno : bytes_written; 271713570Sbrandon.potter@amd.com} 271813570Sbrandon.potter@amd.com 271913570Sbrandon.potter@amd.comtemplate <class OS> 272013570Sbrandon.potter@amd.comSyscallReturn 272113570Sbrandon.potter@amd.comwait4Func(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 272213570Sbrandon.potter@amd.com{ 272313570Sbrandon.potter@amd.com int index = 0; 272413570Sbrandon.potter@amd.com pid_t pid = p->getSyscallArg(tc, index); 272513570Sbrandon.potter@amd.com Addr statPtr = p->getSyscallArg(tc, index); 272613570Sbrandon.potter@amd.com int options = p->getSyscallArg(tc, index); 272713570Sbrandon.potter@amd.com Addr rusagePtr = p->getSyscallArg(tc, index); 272813570Sbrandon.potter@amd.com 272913570Sbrandon.potter@amd.com if (rusagePtr) 273013907Salexandru.dutu@amd.com DPRINTF_SYSCALL(Verbose, "wait4: rusage pointer provided %lx, however " 273113570Sbrandon.potter@amd.com "functionality not supported. Ignoring rusage pointer.\n", 273213907Salexandru.dutu@amd.com rusagePtr); 273313570Sbrandon.potter@amd.com 273413570Sbrandon.potter@amd.com /** 273513570Sbrandon.potter@amd.com * Currently, wait4 is only implemented so that it will wait for children 273613570Sbrandon.potter@amd.com * exit conditions which are denoted by a SIGCHLD signals posted into the 273713570Sbrandon.potter@amd.com * system signal list. We return no additional information via any of the 273813570Sbrandon.potter@amd.com * parameters supplied to wait4. If nothing is found in the system signal 273913570Sbrandon.potter@amd.com * list, we will wait indefinitely for SIGCHLD to post by retrying the 274013570Sbrandon.potter@amd.com * call. 274113570Sbrandon.potter@amd.com */ 274213570Sbrandon.potter@amd.com System *sysh = tc->getSystemPtr(); 274313570Sbrandon.potter@amd.com std::list<BasicSignal>::iterator iter; 274413570Sbrandon.potter@amd.com for (iter=sysh->signalList.begin(); iter!=sysh->signalList.end(); iter++) { 274513570Sbrandon.potter@amd.com if (iter->receiver == p) { 274613570Sbrandon.potter@amd.com if (pid < -1) { 274713570Sbrandon.potter@amd.com if ((iter->sender->pgid() == -pid) 274813570Sbrandon.potter@amd.com && (iter->signalValue == OS::TGT_SIGCHLD)) 274913570Sbrandon.potter@amd.com goto success; 275013570Sbrandon.potter@amd.com } else if (pid == -1) { 275113570Sbrandon.potter@amd.com if (iter->signalValue == OS::TGT_SIGCHLD) 275213570Sbrandon.potter@amd.com goto success; 275313570Sbrandon.potter@amd.com } else if (pid == 0) { 275413570Sbrandon.potter@amd.com if ((iter->sender->pgid() == p->pgid()) 275513570Sbrandon.potter@amd.com && (iter->signalValue == OS::TGT_SIGCHLD)) 275613570Sbrandon.potter@amd.com goto success; 275713570Sbrandon.potter@amd.com } else { 275813570Sbrandon.potter@amd.com if ((iter->sender->pid() == pid) 275913570Sbrandon.potter@amd.com && (iter->signalValue == OS::TGT_SIGCHLD)) 276013570Sbrandon.potter@amd.com goto success; 276113570Sbrandon.potter@amd.com } 276213570Sbrandon.potter@amd.com } 276313570Sbrandon.potter@amd.com } 276413570Sbrandon.potter@amd.com 276513570Sbrandon.potter@amd.com return (options & OS::TGT_WNOHANG) ? 0 : SyscallReturn::retry(); 276613570Sbrandon.potter@amd.com 276713570Sbrandon.potter@amd.comsuccess: 276813570Sbrandon.potter@amd.com // Set status to EXITED for WIFEXITED evaluations. 276913570Sbrandon.potter@amd.com const int EXITED = 0; 277013570Sbrandon.potter@amd.com BufferArg statusBuf(statPtr, sizeof(int)); 277113570Sbrandon.potter@amd.com *(int *)statusBuf.bufferPtr() = EXITED; 277213570Sbrandon.potter@amd.com statusBuf.copyOut(tc->getMemProxy()); 277313570Sbrandon.potter@amd.com 277413570Sbrandon.potter@amd.com // Return the child PID. 277513570Sbrandon.potter@amd.com pid_t retval = iter->sender->pid(); 277613570Sbrandon.potter@amd.com sysh->signalList.erase(iter); 277713570Sbrandon.potter@amd.com return retval; 277813570Sbrandon.potter@amd.com} 277913570Sbrandon.potter@amd.com 278013570Sbrandon.potter@amd.comtemplate <class OS> 278113570Sbrandon.potter@amd.comSyscallReturn 278213570Sbrandon.potter@amd.comacceptFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 278313570Sbrandon.potter@amd.com{ 278413570Sbrandon.potter@amd.com struct sockaddr sa; 278513570Sbrandon.potter@amd.com socklen_t addrLen; 278613570Sbrandon.potter@amd.com int host_fd; 278713570Sbrandon.potter@amd.com int index = 0; 278813570Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 278913570Sbrandon.potter@amd.com Addr addrPtr = p->getSyscallArg(tc, index); 279013570Sbrandon.potter@amd.com Addr lenPtr = p->getSyscallArg(tc, index); 279113570Sbrandon.potter@amd.com 279213570Sbrandon.potter@amd.com BufferArg *lenBufPtr = nullptr; 279313570Sbrandon.potter@amd.com BufferArg *addrBufPtr = nullptr; 279413570Sbrandon.potter@amd.com 279513570Sbrandon.potter@amd.com auto sfdp = std::dynamic_pointer_cast<SocketFDEntry>((*p->fds)[tgt_fd]); 279613570Sbrandon.potter@amd.com if (!sfdp) 279713570Sbrandon.potter@amd.com return -EBADF; 279813570Sbrandon.potter@amd.com int sim_fd = sfdp->getSimFD(); 279913570Sbrandon.potter@amd.com 280013570Sbrandon.potter@amd.com /** 280113570Sbrandon.potter@amd.com * We poll the socket file descriptor first to guarantee that we do not 280213570Sbrandon.potter@amd.com * block on our accept call. The socket can be opened without the 280313570Sbrandon.potter@amd.com * non-blocking flag (it blocks). This will cause deadlocks between 280413570Sbrandon.potter@amd.com * communicating processes. 280513570Sbrandon.potter@amd.com */ 280613570Sbrandon.potter@amd.com struct pollfd pfd; 280713570Sbrandon.potter@amd.com pfd.fd = sim_fd; 280813570Sbrandon.potter@amd.com pfd.events = POLLIN | POLLPRI; 280913570Sbrandon.potter@amd.com if ((poll(&pfd, 1, 0) == 0) 281013570Sbrandon.potter@amd.com && !(sfdp->getFlags() & OS::TGT_O_NONBLOCK)) 281113570Sbrandon.potter@amd.com return SyscallReturn::retry(); 281213570Sbrandon.potter@amd.com 281313570Sbrandon.potter@amd.com if (lenPtr) { 281413570Sbrandon.potter@amd.com lenBufPtr = new BufferArg(lenPtr, sizeof(socklen_t)); 281513570Sbrandon.potter@amd.com lenBufPtr->copyIn(tc->getMemProxy()); 281613570Sbrandon.potter@amd.com memcpy(&addrLen, (socklen_t *)lenBufPtr->bufferPtr(), 281713570Sbrandon.potter@amd.com sizeof(socklen_t)); 281813570Sbrandon.potter@amd.com } 281913570Sbrandon.potter@amd.com 282013570Sbrandon.potter@amd.com if (addrPtr) { 282113570Sbrandon.potter@amd.com addrBufPtr = new BufferArg(addrPtr, sizeof(struct sockaddr)); 282213570Sbrandon.potter@amd.com addrBufPtr->copyIn(tc->getMemProxy()); 282313570Sbrandon.potter@amd.com memcpy(&sa, (struct sockaddr *)addrBufPtr->bufferPtr(), 282413570Sbrandon.potter@amd.com sizeof(struct sockaddr)); 282513570Sbrandon.potter@amd.com } 282613570Sbrandon.potter@amd.com 282713570Sbrandon.potter@amd.com host_fd = accept(sim_fd, &sa, &addrLen); 282813570Sbrandon.potter@amd.com 282913570Sbrandon.potter@amd.com if (host_fd == -1) 283013570Sbrandon.potter@amd.com return -errno; 283113570Sbrandon.potter@amd.com 283213570Sbrandon.potter@amd.com if (addrPtr) { 283313570Sbrandon.potter@amd.com memcpy(addrBufPtr->bufferPtr(), &sa, sizeof(sa)); 283413570Sbrandon.potter@amd.com addrBufPtr->copyOut(tc->getMemProxy()); 283513570Sbrandon.potter@amd.com delete(addrBufPtr); 283613570Sbrandon.potter@amd.com } 283713570Sbrandon.potter@amd.com 283813570Sbrandon.potter@amd.com if (lenPtr) { 283913570Sbrandon.potter@amd.com *(socklen_t *)lenBufPtr->bufferPtr() = addrLen; 284013570Sbrandon.potter@amd.com lenBufPtr->copyOut(tc->getMemProxy()); 284113570Sbrandon.potter@amd.com delete(lenBufPtr); 284213570Sbrandon.potter@amd.com } 284313570Sbrandon.potter@amd.com 284413570Sbrandon.potter@amd.com auto afdp = std::make_shared<SocketFDEntry>(host_fd, sfdp->_domain, 284513570Sbrandon.potter@amd.com sfdp->_type, sfdp->_protocol); 284613570Sbrandon.potter@amd.com return p->fds->allocFD(afdp); 284713570Sbrandon.potter@amd.com} 284813570Sbrandon.potter@amd.com 284913933Sbrandon.potter@amd.com/// Target eventfd() function. 285013933Sbrandon.potter@amd.comtemplate <class OS> 285113933Sbrandon.potter@amd.comSyscallReturn 285213933Sbrandon.potter@amd.comeventfdFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 285313933Sbrandon.potter@amd.com{ 285413933Sbrandon.potter@amd.com#ifdef __linux__ 285513933Sbrandon.potter@amd.com int index = 0; 285613933Sbrandon.potter@amd.com unsigned initval = p->getSyscallArg(tc, index); 285713933Sbrandon.potter@amd.com int in_flags = p->getSyscallArg(tc, index); 285813933Sbrandon.potter@amd.com 285913933Sbrandon.potter@amd.com int sim_fd = eventfd(initval, in_flags); 286013933Sbrandon.potter@amd.com if (sim_fd == -1) 286113933Sbrandon.potter@amd.com return -errno; 286213933Sbrandon.potter@amd.com 286313933Sbrandon.potter@amd.com bool cloexec = in_flags & OS::TGT_O_CLOEXEC; 286413933Sbrandon.potter@amd.com 286513933Sbrandon.potter@amd.com int flags = cloexec ? OS::TGT_O_CLOEXEC : 0; 286613933Sbrandon.potter@amd.com flags |= (in_flags & OS::TGT_O_NONBLOCK) ? OS::TGT_O_NONBLOCK : 0; 286713933Sbrandon.potter@amd.com 286813933Sbrandon.potter@amd.com auto hbfdp = std::make_shared<HBFDEntry>(flags, sim_fd, cloexec); 286913933Sbrandon.potter@amd.com int tgt_fd = p->fds->allocFD(hbfdp); 287013933Sbrandon.potter@amd.com return tgt_fd; 287113933Sbrandon.potter@amd.com#else 287213933Sbrandon.potter@amd.com warnUnsupportedOS("eventfd"); 287313933Sbrandon.potter@amd.com return -1; 287413933Sbrandon.potter@amd.com#endif 287513933Sbrandon.potter@amd.com} 287613933Sbrandon.potter@amd.com 28771354SN/A#endif // __SIM_SYSCALL_EMUL_HH__ 2878