syscall_emul.hh revision 13936
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 6213936SAndrea.Mondelli@ucf.edu#if defined(__linux__) 6313933Sbrandon.potter@amd.com#include <sys/eventfd.h> 6413933Sbrandon.potter@amd.com#include <sys/statfs.h> 6513933Sbrandon.potter@amd.com 6613936SAndrea.Mondelli@ucf.edu#else 6713936SAndrea.Mondelli@ucf.edu#include <sys/mount.h> 6813936SAndrea.Mondelli@ucf.edu 6913933Sbrandon.potter@amd.com#endif 7013933Sbrandon.potter@amd.com 711809SN/A#ifdef __CYGWIN32__ 7211800Sbrandon.potter@amd.com#include <sys/fcntl.h> 7311392Sbrandon.potter@amd.com 741809SN/A#endif 7511392Sbrandon.potter@amd.com#include <fcntl.h> 7613902Sbrandon.potter@amd.com#include <net/if.h> 7713570Sbrandon.potter@amd.com#include <poll.h> 7813902Sbrandon.potter@amd.com#include <sys/ioctl.h> 7911383Sbrandon.potter@amd.com#include <sys/mman.h> 8013568Sbrandon.potter@amd.com#include <sys/socket.h> 813113Sgblack@eecs.umich.edu#include <sys/stat.h> 828229Snate@binkert.org#include <sys/time.h> 8313570Sbrandon.potter@amd.com#include <sys/types.h> 848229Snate@binkert.org#include <sys/uio.h> 8511594Santhony.gutierrez@amd.com#include <unistd.h> 867075Snate@binkert.org 878229Snate@binkert.org#include <cerrno> 8811856Sbrandon.potter@amd.com#include <memory> 897075Snate@binkert.org#include <string> 90360SN/A 9112461Sgabeblack@google.com#include "arch/generic/tlb.hh" 9211886Sbrandon.potter@amd.com#include "arch/utility.hh" 9311800Sbrandon.potter@amd.com#include "base/intmath.hh" 9411392Sbrandon.potter@amd.com#include "base/loader/object_file.hh" 9512334Sgabeblack@google.com#include "base/logging.hh" 961354SN/A#include "base/trace.hh" 976216Snate@binkert.org#include "base/types.hh" 986658Snate@binkert.org#include "config/the_isa.hh" 992474SN/A#include "cpu/base.hh" 1002680Sktlim@umich.edu#include "cpu/thread_context.hh" 1018229Snate@binkert.org#include "mem/page_table.hh" 10211886Sbrandon.potter@amd.com#include "params/Process.hh" 10310496Ssteve.reinhardt@amd.com#include "sim/emul_driver.hh" 10411911SBrandon.Potter@amd.com#include "sim/futex_map.hh" 1058229Snate@binkert.org#include "sim/process.hh" 10611794Sbrandon.potter@amd.com#include "sim/syscall_debug_macros.hh" 10711886Sbrandon.potter@amd.com#include "sim/syscall_desc.hh" 10810497Ssteve.reinhardt@amd.com#include "sim/syscall_emul_buf.hh" 10911794Sbrandon.potter@amd.com#include "sim/syscall_return.hh" 110360SN/A 11113629SAndrea.Mondelli@ucf.edu#if defined(__APPLE__) && defined(__MACH__) && !defined(CMSG_ALIGN) 11213629SAndrea.Mondelli@ucf.edu#define CMSG_ALIGN(len) (((len) + sizeof(size_t) - 1) & ~(sizeof(size_t) - 1)) 11313629SAndrea.Mondelli@ucf.edu#endif 11413629SAndrea.Mondelli@ucf.edu 115360SN/A////////////////////////////////////////////////////////////////////// 116360SN/A// 117360SN/A// The following emulation functions are generic enough that they 118360SN/A// don't need to be recompiled for different emulated OS's. They are 119360SN/A// defined in sim/syscall_emul.cc. 120360SN/A// 121360SN/A////////////////////////////////////////////////////////////////////// 122360SN/A 12313933Sbrandon.potter@amd.comvoid warnUnsupportedOS(std::string syscall_name); 124360SN/A 125378SN/A/// Handler for unimplemented syscalls that we haven't thought about. 1261706SN/ASyscallReturn unimplementedFunc(SyscallDesc *desc, int num, 12711851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 128378SN/A 129378SN/A/// Handler for unimplemented syscalls that we never intend to 130378SN/A/// implement (signal handling, etc.) and should not affect the correct 131378SN/A/// behavior of the program. Print a warning only if the appropriate 132378SN/A/// trace flag is enabled. Return success to the target program. 1331706SN/ASyscallReturn ignoreFunc(SyscallDesc *desc, int num, 13411851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 135360SN/A 13611760Sbrandon.potter@amd.com// Target fallocateFunc() handler. 13711760Sbrandon.potter@amd.comSyscallReturn fallocateFunc(SyscallDesc *desc, int num, 13811851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 13911760Sbrandon.potter@amd.com 1406109Ssanchezd@stanford.edu/// Target exit() handler: terminate current context. 1411706SN/ASyscallReturn exitFunc(SyscallDesc *desc, int num, 14211851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 143378SN/A 1446109Ssanchezd@stanford.edu/// Target exit_group() handler: terminate simulation. (exit all threads) 1456109Ssanchezd@stanford.eduSyscallReturn exitGroupFunc(SyscallDesc *desc, int num, 14611851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 1476109Ssanchezd@stanford.edu 14811886Sbrandon.potter@amd.com/// Target set_tid_address() handler. 14911886Sbrandon.potter@amd.comSyscallReturn setTidAddressFunc(SyscallDesc *desc, int num, 15011886Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 15111886Sbrandon.potter@amd.com 152378SN/A/// Target getpagesize() handler. 1531706SN/ASyscallReturn getpagesizeFunc(SyscallDesc *desc, int num, 15411851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 155378SN/A 1565748SSteve.Reinhardt@amd.com/// Target brk() handler: set brk address. 1575748SSteve.Reinhardt@amd.comSyscallReturn brkFunc(SyscallDesc *desc, int num, 15811851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 159378SN/A 160378SN/A/// Target close() handler. 1611706SN/ASyscallReturn closeFunc(SyscallDesc *desc, int num, 16211851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 163378SN/A 164378SN/A/// Target lseek() handler. 1651706SN/ASyscallReturn lseekFunc(SyscallDesc *desc, int num, 16611851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 167378SN/A 1684118Sgblack@eecs.umich.edu/// Target _llseek() handler. 1694118Sgblack@eecs.umich.eduSyscallReturn _llseekFunc(SyscallDesc *desc, int num, 17011851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 1714118Sgblack@eecs.umich.edu 172378SN/A/// Target munmap() handler. 1731706SN/ASyscallReturn munmapFunc(SyscallDesc *desc, int num, 17411851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 175378SN/A 17613568Sbrandon.potter@amd.com/// Target shutdown() handler. 17713568Sbrandon.potter@amd.comSyscallReturn shutdownFunc(SyscallDesc *desc, int num, 17813568Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 17913568Sbrandon.potter@amd.com 180378SN/A/// Target gethostname() handler. 1811706SN/ASyscallReturn gethostnameFunc(SyscallDesc *desc, int num, 18211851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 183360SN/A 1845513SMichael.Adler@intel.com/// Target getcwd() handler. 1855513SMichael.Adler@intel.comSyscallReturn getcwdFunc(SyscallDesc *desc, int num, 18611851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 1875513SMichael.Adler@intel.com 18810203SAli.Saidi@ARM.com/// Target readlink() handler. 18910203SAli.Saidi@ARM.comSyscallReturn readlinkFunc(SyscallDesc *desc, int num, 19011851Sbrandon.potter@amd.com Process *p, ThreadContext *tc, 19110203SAli.Saidi@ARM.com int index = 0); 1925513SMichael.Adler@intel.comSyscallReturn readlinkFunc(SyscallDesc *desc, int num, 19311851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 1945513SMichael.Adler@intel.com 195511SN/A/// Target unlink() handler. 19610633Smichaelupton@gmail.comSyscallReturn unlinkHelper(SyscallDesc *desc, int num, 19711851Sbrandon.potter@amd.com Process *p, ThreadContext *tc, 19810633Smichaelupton@gmail.com int index); 1991706SN/ASyscallReturn unlinkFunc(SyscallDesc *desc, int num, 20011851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 201511SN/A 20212795Smattdsinclair@gmail.com/// Target link() handler 20312795Smattdsinclair@gmail.comSyscallReturn linkFunc(SyscallDesc *desc, int num, Process *p, 20412795Smattdsinclair@gmail.com ThreadContext *tc); 20512795Smattdsinclair@gmail.com 20612796Smattdsinclair@gmail.com/// Target symlink() handler. 20712796Smattdsinclair@gmail.comSyscallReturn symlinkFunc(SyscallDesc *desc, int num, Process *p, 20812796Smattdsinclair@gmail.com ThreadContext *tc); 20912796Smattdsinclair@gmail.com 2105513SMichael.Adler@intel.com/// Target mkdir() handler. 2115513SMichael.Adler@intel.comSyscallReturn mkdirFunc(SyscallDesc *desc, int num, 21211851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2135513SMichael.Adler@intel.com 21413031Sbrandon.potter@amd.com/// Target mknod() handler. 21513031Sbrandon.potter@amd.comSyscallReturn mknodFunc(SyscallDesc *desc, int num, 21613031Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 21713031Sbrandon.potter@amd.com 21813031Sbrandon.potter@amd.com/// Target chdir() handler. 21913031Sbrandon.potter@amd.comSyscallReturn chdirFunc(SyscallDesc *desc, int num, 22013031Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 22113031Sbrandon.potter@amd.com 22213031Sbrandon.potter@amd.com// Target rmdir() handler. 22313031Sbrandon.potter@amd.comSyscallReturn rmdirFunc(SyscallDesc *desc, int num, 22413031Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 22513031Sbrandon.potter@amd.com 226511SN/A/// Target rename() handler. 2271706SN/ASyscallReturn renameFunc(SyscallDesc *desc, int num, 22811851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2291706SN/A 2301706SN/A 2311706SN/A/// Target truncate() handler. 2321706SN/ASyscallReturn truncateFunc(SyscallDesc *desc, int num, 23311851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2341706SN/A 2351706SN/A 2361706SN/A/// Target ftruncate() handler. 2371706SN/ASyscallReturn ftruncateFunc(SyscallDesc *desc, int num, 23811851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2391706SN/A 240511SN/A 2416703Svince@csl.cornell.edu/// Target truncate64() handler. 2426703Svince@csl.cornell.eduSyscallReturn truncate64Func(SyscallDesc *desc, int num, 24311851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2446703Svince@csl.cornell.edu 2456685Stjones1@inf.ed.ac.uk/// Target ftruncate64() handler. 2466685Stjones1@inf.ed.ac.ukSyscallReturn ftruncate64Func(SyscallDesc *desc, int num, 24711851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2486685Stjones1@inf.ed.ac.uk 2496685Stjones1@inf.ed.ac.uk 2505513SMichael.Adler@intel.com/// Target umask() handler. 2515513SMichael.Adler@intel.comSyscallReturn umaskFunc(SyscallDesc *desc, int num, 25211851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2535513SMichael.Adler@intel.com 25411885Sbrandon.potter@amd.com/// Target gettid() handler. 25511885Sbrandon.potter@amd.comSyscallReturn gettidFunc(SyscallDesc *desc, int num, 25611885Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2575513SMichael.Adler@intel.com 2581999SN/A/// Target chown() handler. 2591999SN/ASyscallReturn chownFunc(SyscallDesc *desc, int num, 26011851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2611999SN/A 26211885Sbrandon.potter@amd.com/// Target setpgid() handler. 26311885Sbrandon.potter@amd.comSyscallReturn setpgidFunc(SyscallDesc *desc, int num, 26411885Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2651999SN/A 2661999SN/A/// Target fchown() handler. 2671999SN/ASyscallReturn fchownFunc(SyscallDesc *desc, int num, 26811851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2691999SN/A 2703079Sstever@eecs.umich.edu/// Target dup() handler. 2713079Sstever@eecs.umich.eduSyscallReturn dupFunc(SyscallDesc *desc, int num, 27211851Sbrandon.potter@amd.com Process *process, ThreadContext *tc); 2733079Sstever@eecs.umich.edu 27411908SBrandon.Potter@amd.com/// Target dup2() handler. 27511908SBrandon.Potter@amd.comSyscallReturn dup2Func(SyscallDesc *desc, int num, 27611908SBrandon.Potter@amd.com Process *process, ThreadContext *tc); 27711908SBrandon.Potter@amd.com 27811875Sbrandon.potter@amd.com/// Target fcntl() handler. 2792093SN/ASyscallReturn fcntlFunc(SyscallDesc *desc, int num, 28011851Sbrandon.potter@amd.com Process *process, ThreadContext *tc); 2812093SN/A 2822687Sksewell@umich.edu/// Target fcntl64() handler. 2832687Sksewell@umich.eduSyscallReturn fcntl64Func(SyscallDesc *desc, int num, 28411851Sbrandon.potter@amd.com Process *process, ThreadContext *tc); 2852687Sksewell@umich.edu 2862238SN/A/// Target setuid() handler. 2872238SN/ASyscallReturn setuidFunc(SyscallDesc *desc, int num, 28811851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2892238SN/A 29011908SBrandon.Potter@amd.com/// Target pipe() handler. 29111908SBrandon.Potter@amd.comSyscallReturn pipeFunc(SyscallDesc *desc, int num, 29211908SBrandon.Potter@amd.com Process *p, ThreadContext *tc); 29311908SBrandon.Potter@amd.com 29411908SBrandon.Potter@amd.com/// Internal pipe() handler. 29511908SBrandon.Potter@amd.comSyscallReturn pipeImpl(SyscallDesc *desc, int num, Process *p, 29611908SBrandon.Potter@amd.com ThreadContext *tc, bool pseudoPipe); 29711908SBrandon.Potter@amd.com 2982238SN/A/// Target getpid() handler. 2992238SN/ASyscallReturn getpidFunc(SyscallDesc *desc, int num, 30011851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3012238SN/A 30213571Sbrandon.potter@amd.com// Target getpeername() handler. 30313571Sbrandon.potter@amd.comSyscallReturn getpeernameFunc(SyscallDesc *desc, int num, 30413571Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 30513571Sbrandon.potter@amd.com 30613568Sbrandon.potter@amd.com// Target bind() handler. 30713568Sbrandon.potter@amd.comSyscallReturn bindFunc(SyscallDesc *desc, int num, 30813568Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 30913568Sbrandon.potter@amd.com 31013568Sbrandon.potter@amd.com// Target listen() handler. 31113568Sbrandon.potter@amd.comSyscallReturn listenFunc(SyscallDesc *desc, int num, 31213568Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 31313568Sbrandon.potter@amd.com 31413568Sbrandon.potter@amd.com// Target connect() handler. 31513568Sbrandon.potter@amd.comSyscallReturn connectFunc(SyscallDesc *desc, int num, 31613568Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 31713568Sbrandon.potter@amd.com 31813448Sciro.santilli@arm.com#if defined(SYS_getdents) 31913031Sbrandon.potter@amd.com// Target getdents() handler. 32013031Sbrandon.potter@amd.comSyscallReturn getdentsFunc(SyscallDesc *desc, int num, 32113031Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 32213448Sciro.santilli@arm.com#endif 32313031Sbrandon.potter@amd.com 32413539Sjavier.setoain@arm.com#if defined(SYS_getdents64) 32513539Sjavier.setoain@arm.com// Target getdents() handler. 32613539Sjavier.setoain@arm.comSyscallReturn getdents64Func(SyscallDesc *desc, int num, 32713539Sjavier.setoain@arm.com Process *p, ThreadContext *tc); 32813539Sjavier.setoain@arm.com#endif 32913539Sjavier.setoain@arm.com 33013569Sbrandon.potter@amd.com// Target sendto() handler. 33113569Sbrandon.potter@amd.comSyscallReturn sendtoFunc(SyscallDesc *desc, int num, 33213569Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 33313569Sbrandon.potter@amd.com 33413569Sbrandon.potter@amd.com// Target recvfrom() handler. 33513569Sbrandon.potter@amd.comSyscallReturn recvfromFunc(SyscallDesc *desc, int num, 33613569Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 33713569Sbrandon.potter@amd.com 33813569Sbrandon.potter@amd.com// Target recvmsg() handler. 33913569Sbrandon.potter@amd.comSyscallReturn recvmsgFunc(SyscallDesc *desc, int num, 34013569Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 34113569Sbrandon.potter@amd.com 34213569Sbrandon.potter@amd.com// Target sendmsg() handler. 34313569Sbrandon.potter@amd.comSyscallReturn sendmsgFunc(SyscallDesc *desc, int num, 34413569Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 34513569Sbrandon.potter@amd.com 34613031Sbrandon.potter@amd.com// Target getuid() handler. 3472238SN/ASyscallReturn getuidFunc(SyscallDesc *desc, int num, 34811851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3492238SN/A 3502238SN/A/// Target getgid() handler. 3512238SN/ASyscallReturn getgidFunc(SyscallDesc *desc, int num, 35211851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3532238SN/A 3542238SN/A/// Target getppid() handler. 3552238SN/ASyscallReturn getppidFunc(SyscallDesc *desc, int num, 35611851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3572238SN/A 3582238SN/A/// Target geteuid() handler. 3592238SN/ASyscallReturn geteuidFunc(SyscallDesc *desc, int num, 36011851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3612238SN/A 3622238SN/A/// Target getegid() handler. 3632238SN/ASyscallReturn getegidFunc(SyscallDesc *desc, int num, 36411851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3652238SN/A 3669455Smitch.hayenga+gem5@gmail.com/// Target access() handler 3679455Smitch.hayenga+gem5@gmail.comSyscallReturn accessFunc(SyscallDesc *desc, int num, 36811851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 36910203SAli.Saidi@ARM.comSyscallReturn accessFunc(SyscallDesc *desc, int num, 37011851Sbrandon.potter@amd.com Process *p, ThreadContext *tc, 37111851Sbrandon.potter@amd.com int index); 3729455Smitch.hayenga+gem5@gmail.com 37313571Sbrandon.potter@amd.com// Target getsockopt() handler. 37413571Sbrandon.potter@amd.comSyscallReturn getsockoptFunc(SyscallDesc *desc, int num, 37513571Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 37613571Sbrandon.potter@amd.com 37713571Sbrandon.potter@amd.com// Target setsockopt() handler. 37813571Sbrandon.potter@amd.comSyscallReturn setsockoptFunc(SyscallDesc *desc, int num, 37913571Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 38013571Sbrandon.potter@amd.com 38113571Sbrandon.potter@amd.com// Target getsockname() handler. 38213571Sbrandon.potter@amd.comSyscallReturn getsocknameFunc(SyscallDesc *desc, int num, 38313571Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 38413571Sbrandon.potter@amd.com 3859112Smarc.orr@gmail.com/// Futex system call 38611906SBrandon.Potter@amd.com/// Implemented by Daniel Sanchez 38711906SBrandon.Potter@amd.com/// Used by printf's in multi-threaded apps 3889112Smarc.orr@gmail.comtemplate <class OS> 3899112Smarc.orr@gmail.comSyscallReturn 39011851Sbrandon.potter@amd.comfutexFunc(SyscallDesc *desc, int callnum, Process *process, 3919112Smarc.orr@gmail.com ThreadContext *tc) 3929112Smarc.orr@gmail.com{ 39311911SBrandon.Potter@amd.com using namespace std; 3949112Smarc.orr@gmail.com 39511911SBrandon.Potter@amd.com int index = 0; 39611911SBrandon.Potter@amd.com Addr uaddr = process->getSyscallArg(tc, index); 39711911SBrandon.Potter@amd.com int op = process->getSyscallArg(tc, index); 39811911SBrandon.Potter@amd.com int val = process->getSyscallArg(tc, index); 39913642Sqtt2@cornell.edu int timeout M5_VAR_USED = process->getSyscallArg(tc, index); 40013642Sqtt2@cornell.edu Addr uaddr2 M5_VAR_USED = process->getSyscallArg(tc, index); 40113642Sqtt2@cornell.edu int val3 = process->getSyscallArg(tc, index); 4029112Smarc.orr@gmail.com 40311911SBrandon.Potter@amd.com /* 40411911SBrandon.Potter@amd.com * Unsupported option that does not affect the correctness of the 40511911SBrandon.Potter@amd.com * application. This is a performance optimization utilized by Linux. 40611911SBrandon.Potter@amd.com */ 4079238Slluc.alvarez@bsc.es op &= ~OS::TGT_FUTEX_PRIVATE_FLAG; 40813642Sqtt2@cornell.edu op &= ~OS::TGT_FUTEX_CLOCK_REALTIME_FLAG; 4099112Smarc.orr@gmail.com 41011911SBrandon.Potter@amd.com FutexMap &futex_map = tc->getSystemPtr()->futexMap; 4119112Smarc.orr@gmail.com 41213642Sqtt2@cornell.edu if (OS::TGT_FUTEX_WAIT == op || OS::TGT_FUTEX_WAIT_BITSET == op) { 41311911SBrandon.Potter@amd.com // Ensure futex system call accessed atomically. 41411911SBrandon.Potter@amd.com BufferArg buf(uaddr, sizeof(int)); 41511911SBrandon.Potter@amd.com buf.copyIn(tc->getMemProxy()); 41611911SBrandon.Potter@amd.com int mem_val = *(int*)buf.bufferPtr(); 4179112Smarc.orr@gmail.com 41811911SBrandon.Potter@amd.com /* 41911911SBrandon.Potter@amd.com * The value in memory at uaddr is not equal with the expected val 42011911SBrandon.Potter@amd.com * (a different thread must have changed it before the system call was 42111911SBrandon.Potter@amd.com * invoked). In this case, we need to throw an error. 42211911SBrandon.Potter@amd.com */ 42311911SBrandon.Potter@amd.com if (val != mem_val) 4249112Smarc.orr@gmail.com return -OS::TGT_EWOULDBLOCK; 4259112Smarc.orr@gmail.com 42613642Sqtt2@cornell.edu if (OS::TGT_FUTEX_WAIT) { 42713642Sqtt2@cornell.edu futex_map.suspend(uaddr, process->tgid(), tc); 42813642Sqtt2@cornell.edu } else { 42913642Sqtt2@cornell.edu futex_map.suspend_bitset(uaddr, process->tgid(), tc, val3); 43013642Sqtt2@cornell.edu } 43111911SBrandon.Potter@amd.com 4329112Smarc.orr@gmail.com return 0; 43311911SBrandon.Potter@amd.com } else if (OS::TGT_FUTEX_WAKE == op) { 43411911SBrandon.Potter@amd.com return futex_map.wakeup(uaddr, process->tgid(), val); 43513642Sqtt2@cornell.edu } else if (OS::TGT_FUTEX_WAKE_BITSET == op) { 43613642Sqtt2@cornell.edu return futex_map.wakeup_bitset(uaddr, process->tgid(), val3); 43713650Smw828@cornell.edu } else if (OS::TGT_FUTEX_REQUEUE == op || 43813650Smw828@cornell.edu OS::TGT_FUTEX_CMP_REQUEUE == op) { 43913650Smw828@cornell.edu 44013650Smw828@cornell.edu // Ensure futex system call accessed atomically. 44113650Smw828@cornell.edu BufferArg buf(uaddr, sizeof(int)); 44213650Smw828@cornell.edu buf.copyIn(tc->getMemProxy()); 44313650Smw828@cornell.edu int mem_val = *(int*)buf.bufferPtr(); 44413650Smw828@cornell.edu /* 44513650Smw828@cornell.edu * For CMP_REQUEUE, the whole operation is only started only if 44613650Smw828@cornell.edu * val3 is still the value of the futex pointed to by uaddr. 44713650Smw828@cornell.edu */ 44813650Smw828@cornell.edu if (OS::TGT_FUTEX_CMP_REQUEUE && val3 != mem_val) 44913650Smw828@cornell.edu return -OS::TGT_EWOULDBLOCK; 45013650Smw828@cornell.edu return futex_map.requeue(uaddr, process->tgid(), val, timeout, uaddr2); 45113651Smw828@cornell.edu } else if (OS::TGT_FUTEX_WAKE_OP == op) { 45213651Smw828@cornell.edu /* 45313651Smw828@cornell.edu * The FUTEX_WAKE_OP operation is equivalent to executing the 45413651Smw828@cornell.edu * following code atomically and totally ordered with respect to 45513651Smw828@cornell.edu * other futex operations on any of the two supplied futex words: 45613651Smw828@cornell.edu * 45713651Smw828@cornell.edu * int oldval = *(int *) addr2; 45813651Smw828@cornell.edu * *(int *) addr2 = oldval op oparg; 45913651Smw828@cornell.edu * futex(addr1, FUTEX_WAKE, val, 0, 0, 0); 46013651Smw828@cornell.edu * if (oldval cmp cmparg) 46113651Smw828@cornell.edu * futex(addr2, FUTEX_WAKE, val2, 0, 0, 0); 46213651Smw828@cornell.edu * 46313651Smw828@cornell.edu * (op, oparg, cmp, cmparg are encoded in val3) 46413651Smw828@cornell.edu * 46513651Smw828@cornell.edu * +---+---+-----------+-----------+ 46613651Smw828@cornell.edu * |op |cmp| oparg | cmparg | 46713651Smw828@cornell.edu * +---+---+-----------+-----------+ 46813651Smw828@cornell.edu * 4 4 12 12 <== # of bits 46913651Smw828@cornell.edu * 47013651Smw828@cornell.edu * reference: http://man7.org/linux/man-pages/man2/futex.2.html 47113651Smw828@cornell.edu * 47213651Smw828@cornell.edu */ 47313651Smw828@cornell.edu // get value from simulated-space 47413651Smw828@cornell.edu BufferArg buf(uaddr2, sizeof(int)); 47513651Smw828@cornell.edu buf.copyIn(tc->getMemProxy()); 47613651Smw828@cornell.edu int oldval = *(int*)buf.bufferPtr(); 47713651Smw828@cornell.edu int newval = oldval; 47813651Smw828@cornell.edu // extract op, oparg, cmp, cmparg from val3 47913651Smw828@cornell.edu int wake_cmparg = val3 & 0xfff; 48013651Smw828@cornell.edu int wake_oparg = (val3 & 0xfff000) >> 12; 48113651Smw828@cornell.edu int wake_cmp = (val3 & 0xf000000) >> 24; 48213651Smw828@cornell.edu int wake_op = (val3 & 0xf0000000) >> 28; 48313651Smw828@cornell.edu if ((wake_op & OS::TGT_FUTEX_OP_ARG_SHIFT) >> 3 == 1) 48413651Smw828@cornell.edu wake_oparg = (1 << wake_oparg); 48513651Smw828@cornell.edu wake_op &= ~OS::TGT_FUTEX_OP_ARG_SHIFT; 48613651Smw828@cornell.edu // perform operation on the value of the second futex 48713651Smw828@cornell.edu if (wake_op == OS::TGT_FUTEX_OP_SET) 48813651Smw828@cornell.edu newval = wake_oparg; 48913651Smw828@cornell.edu else if (wake_op == OS::TGT_FUTEX_OP_ADD) 49013651Smw828@cornell.edu newval += wake_oparg; 49113651Smw828@cornell.edu else if (wake_op == OS::TGT_FUTEX_OP_OR) 49213651Smw828@cornell.edu newval |= wake_oparg; 49313651Smw828@cornell.edu else if (wake_op == OS::TGT_FUTEX_OP_ANDN) 49413651Smw828@cornell.edu newval &= ~wake_oparg; 49513651Smw828@cornell.edu else if (wake_op == OS::TGT_FUTEX_OP_XOR) 49613651Smw828@cornell.edu newval ^= wake_oparg; 49713651Smw828@cornell.edu // copy updated value back to simulated-space 49813651Smw828@cornell.edu *(int*)buf.bufferPtr() = newval; 49913651Smw828@cornell.edu buf.copyOut(tc->getMemProxy()); 50013651Smw828@cornell.edu // perform the first wake-up 50113651Smw828@cornell.edu int woken1 = futex_map.wakeup(uaddr, process->tgid(), val); 50213651Smw828@cornell.edu int woken2 = 0; 50313651Smw828@cornell.edu // calculate the condition of the second wake-up 50413651Smw828@cornell.edu bool is_wake2 = false; 50513651Smw828@cornell.edu if (wake_cmp == OS::TGT_FUTEX_OP_CMP_EQ) 50613651Smw828@cornell.edu is_wake2 = oldval == wake_cmparg; 50713651Smw828@cornell.edu else if (wake_cmp == OS::TGT_FUTEX_OP_CMP_NE) 50813651Smw828@cornell.edu is_wake2 = oldval != wake_cmparg; 50913651Smw828@cornell.edu else if (wake_cmp == OS::TGT_FUTEX_OP_CMP_LT) 51013651Smw828@cornell.edu is_wake2 = oldval < wake_cmparg; 51113651Smw828@cornell.edu else if (wake_cmp == OS::TGT_FUTEX_OP_CMP_LE) 51213651Smw828@cornell.edu is_wake2 = oldval <= wake_cmparg; 51313651Smw828@cornell.edu else if (wake_cmp == OS::TGT_FUTEX_OP_CMP_GT) 51413651Smw828@cornell.edu is_wake2 = oldval > wake_cmparg; 51513651Smw828@cornell.edu else if (wake_cmp == OS::TGT_FUTEX_OP_CMP_GE) 51613651Smw828@cornell.edu is_wake2 = oldval >= wake_cmparg; 51713651Smw828@cornell.edu // perform the second wake-up 51813651Smw828@cornell.edu if (is_wake2) 51913651Smw828@cornell.edu woken2 = futex_map.wakeup(uaddr2, process->tgid(), timeout); 52013651Smw828@cornell.edu 52113651Smw828@cornell.edu return woken1 + woken2; 5229112Smarc.orr@gmail.com } 52311911SBrandon.Potter@amd.com warn("futex: op %d not implemented; ignoring.", op); 52411911SBrandon.Potter@amd.com return -ENOSYS; 5259112Smarc.orr@gmail.com} 5269112Smarc.orr@gmail.com 5272238SN/A 5282238SN/A/// Pseudo Funcs - These functions use a different return convension, 5292238SN/A/// returning a second value in a register other than the normal return register 5302238SN/ASyscallReturn pipePseudoFunc(SyscallDesc *desc, int num, 53111851Sbrandon.potter@amd.com Process *process, ThreadContext *tc); 5322238SN/A 5332238SN/A/// Target getpidPseudo() handler. 5342238SN/ASyscallReturn getpidPseudoFunc(SyscallDesc *desc, int num, 53511851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 5362238SN/A 5372238SN/A/// Target getuidPseudo() handler. 5382238SN/ASyscallReturn getuidPseudoFunc(SyscallDesc *desc, int num, 53911851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 5402238SN/A 5412238SN/A/// Target getgidPseudo() handler. 5422238SN/ASyscallReturn getgidPseudoFunc(SyscallDesc *desc, int num, 54311851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 5442238SN/A 5452238SN/A 5461354SN/A/// A readable name for 1,000,000, for converting microseconds to seconds. 5471354SN/Aconst int one_million = 1000000; 54810796Sbrandon.potter@amd.com/// A readable name for 1,000,000,000, for converting nanoseconds to seconds. 54910796Sbrandon.potter@amd.comconst int one_billion = 1000000000; 5501354SN/A 5511354SN/A/// Approximate seconds since the epoch (1/1/1970). About a billion, 5521354SN/A/// by my reckoning. We want to keep this a constant (not use the 5531354SN/A/// real-world time) to keep simulations repeatable. 5541354SN/Aconst unsigned seconds_since_epoch = 1000000000; 5551354SN/A 5561354SN/A/// Helper function to convert current elapsed time to seconds and 5571354SN/A/// microseconds. 5581354SN/Atemplate <class T1, class T2> 5591354SN/Avoid 56010796Sbrandon.potter@amd.comgetElapsedTimeMicro(T1 &sec, T2 &usec) 5611354SN/A{ 56210796Sbrandon.potter@amd.com uint64_t elapsed_usecs = curTick() / SimClock::Int::us; 5631354SN/A sec = elapsed_usecs / one_million; 5641354SN/A usec = elapsed_usecs % one_million; 5651354SN/A} 5661354SN/A 56710796Sbrandon.potter@amd.com/// Helper function to convert current elapsed time to seconds and 56810796Sbrandon.potter@amd.com/// nanoseconds. 56910796Sbrandon.potter@amd.comtemplate <class T1, class T2> 57010796Sbrandon.potter@amd.comvoid 57110796Sbrandon.potter@amd.comgetElapsedTimeNano(T1 &sec, T2 &nsec) 57210796Sbrandon.potter@amd.com{ 57310796Sbrandon.potter@amd.com uint64_t elapsed_nsecs = curTick() / SimClock::Int::ns; 57410796Sbrandon.potter@amd.com sec = elapsed_nsecs / one_billion; 57510796Sbrandon.potter@amd.com nsec = elapsed_nsecs % one_billion; 57610796Sbrandon.potter@amd.com} 57710796Sbrandon.potter@amd.com 578360SN/A////////////////////////////////////////////////////////////////////// 579360SN/A// 580360SN/A// The following emulation functions are generic, but need to be 581360SN/A// templated to account for differences in types, constants, etc. 582360SN/A// 583360SN/A////////////////////////////////////////////////////////////////////// 584360SN/A 58511759Sbrandon.potter@amd.com typedef struct statfs hst_statfs; 5863113Sgblack@eecs.umich.edu#if NO_STAT64 5873113Sgblack@eecs.umich.edu typedef struct stat hst_stat; 5883113Sgblack@eecs.umich.edu typedef struct stat hst_stat64; 5893113Sgblack@eecs.umich.edu#else 5903113Sgblack@eecs.umich.edu typedef struct stat hst_stat; 5913113Sgblack@eecs.umich.edu typedef struct stat64 hst_stat64; 5923113Sgblack@eecs.umich.edu#endif 5933113Sgblack@eecs.umich.edu 5943113Sgblack@eecs.umich.edu//// Helper function to convert a host stat buffer to a target stat 5953113Sgblack@eecs.umich.edu//// buffer. Also copies the target buffer out to the simulated 5963113Sgblack@eecs.umich.edu//// memory space. Used by stat(), fstat(), and lstat(). 5973113Sgblack@eecs.umich.edu 5983113Sgblack@eecs.umich.edutemplate <typename target_stat, typename host_stat> 59912032Sandreas.sandberg@arm.comvoid 6003113Sgblack@eecs.umich.educonvertStatBuf(target_stat &tgt, host_stat *host, bool fakeTTY = false) 6013113Sgblack@eecs.umich.edu{ 6024189Sgblack@eecs.umich.edu using namespace TheISA; 6034189Sgblack@eecs.umich.edu 6043113Sgblack@eecs.umich.edu if (fakeTTY) 6053113Sgblack@eecs.umich.edu tgt->st_dev = 0xA; 6063113Sgblack@eecs.umich.edu else 6073113Sgblack@eecs.umich.edu tgt->st_dev = host->st_dev; 6088737Skoansin.tan@gmail.com tgt->st_dev = TheISA::htog(tgt->st_dev); 6093113Sgblack@eecs.umich.edu tgt->st_ino = host->st_ino; 6108737Skoansin.tan@gmail.com tgt->st_ino = TheISA::htog(tgt->st_ino); 6113277Sgblack@eecs.umich.edu tgt->st_mode = host->st_mode; 6125515SMichael.Adler@intel.com if (fakeTTY) { 6135515SMichael.Adler@intel.com // Claim to be a character device 6145515SMichael.Adler@intel.com tgt->st_mode &= ~S_IFMT; // Clear S_IFMT 6155515SMichael.Adler@intel.com tgt->st_mode |= S_IFCHR; // Set S_IFCHR 6165515SMichael.Adler@intel.com } 6178737Skoansin.tan@gmail.com tgt->st_mode = TheISA::htog(tgt->st_mode); 6183277Sgblack@eecs.umich.edu tgt->st_nlink = host->st_nlink; 6198737Skoansin.tan@gmail.com tgt->st_nlink = TheISA::htog(tgt->st_nlink); 6203277Sgblack@eecs.umich.edu tgt->st_uid = host->st_uid; 6218737Skoansin.tan@gmail.com tgt->st_uid = TheISA::htog(tgt->st_uid); 6223277Sgblack@eecs.umich.edu tgt->st_gid = host->st_gid; 6238737Skoansin.tan@gmail.com tgt->st_gid = TheISA::htog(tgt->st_gid); 6243113Sgblack@eecs.umich.edu if (fakeTTY) 6253113Sgblack@eecs.umich.edu tgt->st_rdev = 0x880d; 6263113Sgblack@eecs.umich.edu else 6273113Sgblack@eecs.umich.edu tgt->st_rdev = host->st_rdev; 6288737Skoansin.tan@gmail.com tgt->st_rdev = TheISA::htog(tgt->st_rdev); 6293113Sgblack@eecs.umich.edu tgt->st_size = host->st_size; 6308737Skoansin.tan@gmail.com tgt->st_size = TheISA::htog(tgt->st_size); 6313114Sgblack@eecs.umich.edu tgt->st_atimeX = host->st_atime; 6328737Skoansin.tan@gmail.com tgt->st_atimeX = TheISA::htog(tgt->st_atimeX); 6333114Sgblack@eecs.umich.edu tgt->st_mtimeX = host->st_mtime; 6348737Skoansin.tan@gmail.com tgt->st_mtimeX = TheISA::htog(tgt->st_mtimeX); 6353114Sgblack@eecs.umich.edu tgt->st_ctimeX = host->st_ctime; 6368737Skoansin.tan@gmail.com tgt->st_ctimeX = TheISA::htog(tgt->st_ctimeX); 63711906SBrandon.Potter@amd.com // Force the block size to be 8KB. This helps to ensure buffered io works 6384061Sgblack@eecs.umich.edu // consistently across different hosts. 6394061Sgblack@eecs.umich.edu tgt->st_blksize = 0x2000; 6408737Skoansin.tan@gmail.com tgt->st_blksize = TheISA::htog(tgt->st_blksize); 6413113Sgblack@eecs.umich.edu tgt->st_blocks = host->st_blocks; 6428737Skoansin.tan@gmail.com tgt->st_blocks = TheISA::htog(tgt->st_blocks); 6433113Sgblack@eecs.umich.edu} 6443113Sgblack@eecs.umich.edu 6453113Sgblack@eecs.umich.edu// Same for stat64 6463113Sgblack@eecs.umich.edu 6473113Sgblack@eecs.umich.edutemplate <typename target_stat, typename host_stat64> 64812032Sandreas.sandberg@arm.comvoid 6493113Sgblack@eecs.umich.educonvertStat64Buf(target_stat &tgt, host_stat64 *host, bool fakeTTY = false) 6503113Sgblack@eecs.umich.edu{ 6514189Sgblack@eecs.umich.edu using namespace TheISA; 6524189Sgblack@eecs.umich.edu 6533113Sgblack@eecs.umich.edu convertStatBuf<target_stat, host_stat64>(tgt, host, fakeTTY); 6543113Sgblack@eecs.umich.edu#if defined(STAT_HAVE_NSEC) 6553113Sgblack@eecs.umich.edu tgt->st_atime_nsec = host->st_atime_nsec; 6568737Skoansin.tan@gmail.com tgt->st_atime_nsec = TheISA::htog(tgt->st_atime_nsec); 6573113Sgblack@eecs.umich.edu tgt->st_mtime_nsec = host->st_mtime_nsec; 6588737Skoansin.tan@gmail.com tgt->st_mtime_nsec = TheISA::htog(tgt->st_mtime_nsec); 6593113Sgblack@eecs.umich.edu tgt->st_ctime_nsec = host->st_ctime_nsec; 6608737Skoansin.tan@gmail.com tgt->st_ctime_nsec = TheISA::htog(tgt->st_ctime_nsec); 6613113Sgblack@eecs.umich.edu#else 6623113Sgblack@eecs.umich.edu tgt->st_atime_nsec = 0; 6633113Sgblack@eecs.umich.edu tgt->st_mtime_nsec = 0; 6643113Sgblack@eecs.umich.edu tgt->st_ctime_nsec = 0; 6653113Sgblack@eecs.umich.edu#endif 6663113Sgblack@eecs.umich.edu} 6673113Sgblack@eecs.umich.edu 66811906SBrandon.Potter@amd.com// Here are a couple of convenience functions 6693113Sgblack@eecs.umich.edutemplate<class OS> 67012032Sandreas.sandberg@arm.comvoid 6718852Sandreas.hansson@arm.comcopyOutStatBuf(SETranslatingPortProxy &mem, Addr addr, 67211906SBrandon.Potter@amd.com hst_stat *host, bool fakeTTY = false) 6733113Sgblack@eecs.umich.edu{ 6743113Sgblack@eecs.umich.edu typedef TypedBufferArg<typename OS::tgt_stat> tgt_stat_buf; 6753113Sgblack@eecs.umich.edu tgt_stat_buf tgt(addr); 6763113Sgblack@eecs.umich.edu convertStatBuf<tgt_stat_buf, hst_stat>(tgt, host, fakeTTY); 6773113Sgblack@eecs.umich.edu tgt.copyOut(mem); 6783113Sgblack@eecs.umich.edu} 6793113Sgblack@eecs.umich.edu 6803113Sgblack@eecs.umich.edutemplate<class OS> 68112032Sandreas.sandberg@arm.comvoid 6828852Sandreas.hansson@arm.comcopyOutStat64Buf(SETranslatingPortProxy &mem, Addr addr, 68311906SBrandon.Potter@amd.com hst_stat64 *host, bool fakeTTY = false) 6843113Sgblack@eecs.umich.edu{ 6853113Sgblack@eecs.umich.edu typedef TypedBufferArg<typename OS::tgt_stat64> tgt_stat_buf; 6863113Sgblack@eecs.umich.edu tgt_stat_buf tgt(addr); 6876686Stjones1@inf.ed.ac.uk convertStat64Buf<tgt_stat_buf, hst_stat64>(tgt, host, fakeTTY); 6883113Sgblack@eecs.umich.edu tgt.copyOut(mem); 6893113Sgblack@eecs.umich.edu} 6903113Sgblack@eecs.umich.edu 69111759Sbrandon.potter@amd.comtemplate <class OS> 69212032Sandreas.sandberg@arm.comvoid 69311759Sbrandon.potter@amd.comcopyOutStatfsBuf(SETranslatingPortProxy &mem, Addr addr, 69411759Sbrandon.potter@amd.com hst_statfs *host) 69511759Sbrandon.potter@amd.com{ 69611759Sbrandon.potter@amd.com TypedBufferArg<typename OS::tgt_statfs> tgt(addr); 69711759Sbrandon.potter@amd.com 69811812Sbaz21@cam.ac.uk tgt->f_type = TheISA::htog(host->f_type); 69911812Sbaz21@cam.ac.uk#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) 70011812Sbaz21@cam.ac.uk tgt->f_bsize = TheISA::htog(host->f_iosize); 70111759Sbrandon.potter@amd.com#else 70211812Sbaz21@cam.ac.uk tgt->f_bsize = TheISA::htog(host->f_bsize); 70311759Sbrandon.potter@amd.com#endif 70411759Sbrandon.potter@amd.com tgt->f_blocks = TheISA::htog(host->f_blocks); 70511759Sbrandon.potter@amd.com tgt->f_bfree = TheISA::htog(host->f_bfree); 70611759Sbrandon.potter@amd.com tgt->f_bavail = TheISA::htog(host->f_bavail); 70711759Sbrandon.potter@amd.com tgt->f_files = TheISA::htog(host->f_files); 70811759Sbrandon.potter@amd.com tgt->f_ffree = TheISA::htog(host->f_ffree); 70911759Sbrandon.potter@amd.com memcpy(&tgt->f_fsid, &host->f_fsid, sizeof(host->f_fsid)); 71011812Sbaz21@cam.ac.uk#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) 71111812Sbaz21@cam.ac.uk tgt->f_namelen = TheISA::htog(host->f_namemax); 71211812Sbaz21@cam.ac.uk tgt->f_frsize = TheISA::htog(host->f_bsize); 71311812Sbaz21@cam.ac.uk#elif defined(__APPLE__) 71411812Sbaz21@cam.ac.uk tgt->f_namelen = 0; 71511812Sbaz21@cam.ac.uk tgt->f_frsize = 0; 71611812Sbaz21@cam.ac.uk#else 71711759Sbrandon.potter@amd.com tgt->f_namelen = TheISA::htog(host->f_namelen); 71811759Sbrandon.potter@amd.com tgt->f_frsize = TheISA::htog(host->f_frsize); 71911812Sbaz21@cam.ac.uk#endif 72011812Sbaz21@cam.ac.uk#if defined(__linux__) 72111759Sbrandon.potter@amd.com memcpy(&tgt->f_spare, &host->f_spare, sizeof(host->f_spare)); 72211812Sbaz21@cam.ac.uk#else 72311812Sbaz21@cam.ac.uk /* 72411812Sbaz21@cam.ac.uk * The fields are different sizes per OS. Don't bother with 72511812Sbaz21@cam.ac.uk * f_spare or f_reserved on non-Linux for now. 72611812Sbaz21@cam.ac.uk */ 72711812Sbaz21@cam.ac.uk memset(&tgt->f_spare, 0, sizeof(tgt->f_spare)); 72811812Sbaz21@cam.ac.uk#endif 72911759Sbrandon.potter@amd.com 73011759Sbrandon.potter@amd.com tgt.copyOut(mem); 73111759Sbrandon.potter@amd.com} 73211759Sbrandon.potter@amd.com 733378SN/A/// Target ioctl() handler. For the most part, programs call ioctl() 734378SN/A/// only to find out if their stdout is a tty, to determine whether to 7359141Smarc.orr@gmail.com/// do line or block buffering. We always claim that output fds are 7369141Smarc.orr@gmail.com/// not TTYs to provide repeatable results. 737360SN/Atemplate <class OS> 7381450SN/ASyscallReturn 73911856Sbrandon.potter@amd.comioctlFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 740360SN/A{ 7416701Sgblack@eecs.umich.edu int index = 0; 74211856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 74311856Sbrandon.potter@amd.com unsigned req = p->getSyscallArg(tc, index); 744360SN/A 74513907Salexandru.dutu@amd.com DPRINTF_SYSCALL(Verbose, "ioctl(%d, 0x%x, ...)\n", tgt_fd, req); 746360SN/A 74711856Sbrandon.potter@amd.com if (OS::isTtyReq(req)) 74811856Sbrandon.potter@amd.com return -ENOTTY; 74910496Ssteve.reinhardt@amd.com 75011856Sbrandon.potter@amd.com auto dfdp = std::dynamic_pointer_cast<DeviceFDEntry>((*p->fds)[tgt_fd]); 75113902Sbrandon.potter@amd.com if (dfdp) { 75213902Sbrandon.potter@amd.com EmulatedDriver *emul_driver = dfdp->getDriver(); 75313902Sbrandon.potter@amd.com if (emul_driver) 75413902Sbrandon.potter@amd.com return emul_driver->ioctl(p, tc, req); 75513902Sbrandon.potter@amd.com } 75613902Sbrandon.potter@amd.com 75713902Sbrandon.potter@amd.com auto sfdp = std::dynamic_pointer_cast<SocketFDEntry>((*p->fds)[tgt_fd]); 75813902Sbrandon.potter@amd.com if (sfdp) { 75913902Sbrandon.potter@amd.com int status; 76013902Sbrandon.potter@amd.com 76113902Sbrandon.potter@amd.com switch (req) { 76213902Sbrandon.potter@amd.com case SIOCGIFCONF: { 76313902Sbrandon.potter@amd.com Addr conf_addr = p->getSyscallArg(tc, index); 76413902Sbrandon.potter@amd.com BufferArg conf_arg(conf_addr, sizeof(ifconf)); 76513902Sbrandon.potter@amd.com conf_arg.copyIn(tc->getMemProxy()); 76613902Sbrandon.potter@amd.com 76713902Sbrandon.potter@amd.com ifconf *conf = (ifconf*)conf_arg.bufferPtr(); 76813902Sbrandon.potter@amd.com Addr ifc_buf_addr = (Addr)conf->ifc_buf; 76913902Sbrandon.potter@amd.com BufferArg ifc_buf_arg(ifc_buf_addr, conf->ifc_len); 77013902Sbrandon.potter@amd.com ifc_buf_arg.copyIn(tc->getMemProxy()); 77113902Sbrandon.potter@amd.com 77213902Sbrandon.potter@amd.com conf->ifc_buf = (char*)ifc_buf_arg.bufferPtr(); 77313902Sbrandon.potter@amd.com 77413902Sbrandon.potter@amd.com status = ioctl(sfdp->getSimFD(), req, conf_arg.bufferPtr()); 77513902Sbrandon.potter@amd.com if (status != -1) { 77613902Sbrandon.potter@amd.com conf->ifc_buf = (char*)ifc_buf_addr; 77713902Sbrandon.potter@amd.com ifc_buf_arg.copyOut(tc->getMemProxy()); 77813902Sbrandon.potter@amd.com conf_arg.copyOut(tc->getMemProxy()); 77913902Sbrandon.potter@amd.com } 78013902Sbrandon.potter@amd.com 78113902Sbrandon.potter@amd.com return status; 78213902Sbrandon.potter@amd.com } 78313902Sbrandon.potter@amd.com case SIOCGIFFLAGS: 78413936SAndrea.Mondelli@ucf.edu#if defined(__linux__) 78513902Sbrandon.potter@amd.com case SIOCGIFINDEX: 78613902Sbrandon.potter@amd.com#endif 78713902Sbrandon.potter@amd.com case SIOCGIFNETMASK: 78813902Sbrandon.potter@amd.com case SIOCGIFADDR: 78913936SAndrea.Mondelli@ucf.edu#if defined(__linux__) 79013902Sbrandon.potter@amd.com case SIOCGIFHWADDR: 79113902Sbrandon.potter@amd.com#endif 79213902Sbrandon.potter@amd.com case SIOCGIFMTU: { 79313902Sbrandon.potter@amd.com Addr req_addr = p->getSyscallArg(tc, index); 79413902Sbrandon.potter@amd.com BufferArg req_arg(req_addr, sizeof(ifreq)); 79513902Sbrandon.potter@amd.com req_arg.copyIn(tc->getMemProxy()); 79613902Sbrandon.potter@amd.com 79713902Sbrandon.potter@amd.com status = ioctl(sfdp->getSimFD(), req, req_arg.bufferPtr()); 79813902Sbrandon.potter@amd.com if (status != -1) 79913902Sbrandon.potter@amd.com req_arg.copyOut(tc->getMemProxy()); 80013902Sbrandon.potter@amd.com return status; 80113902Sbrandon.potter@amd.com } 80213902Sbrandon.potter@amd.com } 80313902Sbrandon.potter@amd.com } 80410496Ssteve.reinhardt@amd.com 80511856Sbrandon.potter@amd.com /** 80611856Sbrandon.potter@amd.com * For lack of a better return code, return ENOTTY. Ideally, we should 80711856Sbrandon.potter@amd.com * return something better here, but at least we issue the warning. 80811856Sbrandon.potter@amd.com */ 80911856Sbrandon.potter@amd.com warn("Unsupported ioctl call (return ENOTTY): ioctl(%d, 0x%x, ...) @ \n", 81010930Sbrandon.potter@amd.com tgt_fd, req, tc->pcState()); 8119141Smarc.orr@gmail.com return -ENOTTY; 812360SN/A} 813360SN/A 814360SN/Atemplate <class OS> 81511907SBrandon.Potter@amd.comSyscallReturn 81611907SBrandon.Potter@amd.comopenImpl(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc, 81711907SBrandon.Potter@amd.com bool isopenat) 818360SN/A{ 81911907SBrandon.Potter@amd.com int index = 0; 82011907SBrandon.Potter@amd.com int tgt_dirfd = -1; 82111907SBrandon.Potter@amd.com 82211907SBrandon.Potter@amd.com /** 82311907SBrandon.Potter@amd.com * If using the openat variant, read in the target directory file 82411907SBrandon.Potter@amd.com * descriptor from the simulated process. 82511907SBrandon.Potter@amd.com */ 82611907SBrandon.Potter@amd.com if (isopenat) 82711907SBrandon.Potter@amd.com tgt_dirfd = p->getSyscallArg(tc, index); 82811907SBrandon.Potter@amd.com 82911907SBrandon.Potter@amd.com /** 83011907SBrandon.Potter@amd.com * Retrieve the simulated process' memory proxy and then read in the path 83111907SBrandon.Potter@amd.com * string from that memory space into the host's working memory space. 83211907SBrandon.Potter@amd.com */ 833360SN/A std::string path; 83411907SBrandon.Potter@amd.com if (!tc->getMemProxy().tryReadString(path, p->getSyscallArg(tc, index))) 8351458SN/A return -EFAULT; 836360SN/A 83711907SBrandon.Potter@amd.com#ifdef __CYGWIN32__ 83811907SBrandon.Potter@amd.com int host_flags = O_BINARY; 83911907SBrandon.Potter@amd.com#else 84011907SBrandon.Potter@amd.com int host_flags = 0; 84111907SBrandon.Potter@amd.com#endif 84211907SBrandon.Potter@amd.com /** 84311907SBrandon.Potter@amd.com * Translate target flags into host flags. Flags exist which are not 84411907SBrandon.Potter@amd.com * ported between architectures which can cause check failures. 84511907SBrandon.Potter@amd.com */ 84611907SBrandon.Potter@amd.com int tgt_flags = p->getSyscallArg(tc, index); 847360SN/A for (int i = 0; i < OS::NUM_OPEN_FLAGS; i++) { 84811907SBrandon.Potter@amd.com if (tgt_flags & OS::openFlagTable[i].tgtFlag) { 84911907SBrandon.Potter@amd.com tgt_flags &= ~OS::openFlagTable[i].tgtFlag; 85011907SBrandon.Potter@amd.com host_flags |= OS::openFlagTable[i].hostFlag; 851360SN/A } 852360SN/A } 85311907SBrandon.Potter@amd.com if (tgt_flags) { 85411907SBrandon.Potter@amd.com warn("open%s: cannot decode flags 0x%x", 85511907SBrandon.Potter@amd.com isopenat ? "at" : "", tgt_flags); 85611907SBrandon.Potter@amd.com } 857360SN/A#ifdef __CYGWIN32__ 85811907SBrandon.Potter@amd.com host_flags |= O_BINARY; 859360SN/A#endif 860360SN/A 86111907SBrandon.Potter@amd.com int mode = p->getSyscallArg(tc, index); 8623669Sbinkertn@umich.edu 86311907SBrandon.Potter@amd.com /** 86411907SBrandon.Potter@amd.com * If the simulated process called open or openat with AT_FDCWD specified, 86511907SBrandon.Potter@amd.com * take the current working directory value which was passed into the 86611907SBrandon.Potter@amd.com * process class as a Python parameter and append the current path to 86711907SBrandon.Potter@amd.com * create a full path. 86811907SBrandon.Potter@amd.com * Otherwise, openat with a valid target directory file descriptor has 86911907SBrandon.Potter@amd.com * been called. If the path option, which was passed in as a parameter, 87011907SBrandon.Potter@amd.com * is not absolute, retrieve the directory file descriptor's path and 87111907SBrandon.Potter@amd.com * prepend it to the path passed in as a parameter. 87211907SBrandon.Potter@amd.com * In every case, we should have a full path (which is relevant to the 87311907SBrandon.Potter@amd.com * host) to work with after this block has been passed. 87411907SBrandon.Potter@amd.com */ 87513883Sdavid.hashe@amd.com std::string redir_path = path; 87613883Sdavid.hashe@amd.com std::string abs_path = path; 87713883Sdavid.hashe@amd.com if (!isopenat || tgt_dirfd == OS::TGT_AT_FDCWD) { 87813883Sdavid.hashe@amd.com abs_path = p->absolutePath(path, true); 87913883Sdavid.hashe@amd.com redir_path = p->checkPathRedirect(path); 88011907SBrandon.Potter@amd.com } else if (!startswith(path, "/")) { 88111907SBrandon.Potter@amd.com std::shared_ptr<FDEntry> fdep = ((*p->fds)[tgt_dirfd]); 88211907SBrandon.Potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(fdep); 88311907SBrandon.Potter@amd.com if (!ffdp) 88411907SBrandon.Potter@amd.com return -EBADF; 88513883Sdavid.hashe@amd.com abs_path = ffdp->getFileName() + path; 88613883Sdavid.hashe@amd.com redir_path = p->checkPathRedirect(abs_path); 88711907SBrandon.Potter@amd.com } 8881706SN/A 88911907SBrandon.Potter@amd.com /** 89011907SBrandon.Potter@amd.com * Since this is an emulated environment, we create pseudo file 89111907SBrandon.Potter@amd.com * descriptors for device requests that have been registered with 89211907SBrandon.Potter@amd.com * the process class through Python; this allows us to create a file 89311907SBrandon.Potter@amd.com * descriptor for subsequent ioctl or mmap calls. 89411907SBrandon.Potter@amd.com */ 89513883Sdavid.hashe@amd.com if (startswith(abs_path, "/dev/")) { 89613883Sdavid.hashe@amd.com std::string filename = abs_path.substr(strlen("/dev/")); 89711907SBrandon.Potter@amd.com EmulatedDriver *drv = p->findDriver(filename); 89811907SBrandon.Potter@amd.com if (drv) { 89911907SBrandon.Potter@amd.com DPRINTF_SYSCALL(Verbose, "open%s: passing call to " 90011907SBrandon.Potter@amd.com "driver open with path[%s]\n", 90113883Sdavid.hashe@amd.com isopenat ? "at" : "", abs_path.c_str()); 90211907SBrandon.Potter@amd.com return drv->open(p, tc, mode, host_flags); 90310496Ssteve.reinhardt@amd.com } 90411907SBrandon.Potter@amd.com /** 90511907SBrandon.Potter@amd.com * Fall through here for pass through to host devices, such 90611907SBrandon.Potter@amd.com * as /dev/zero 90711907SBrandon.Potter@amd.com */ 90810496Ssteve.reinhardt@amd.com } 90910496Ssteve.reinhardt@amd.com 91011907SBrandon.Potter@amd.com /** 91113883Sdavid.hashe@amd.com * We make several attempts resolve a call to open. 91213883Sdavid.hashe@amd.com * 91313883Sdavid.hashe@amd.com * 1) Resolve any path redirection before hand. This will set the path 91413883Sdavid.hashe@amd.com * up with variable 'redir_path' which may contain a modified path or 91513883Sdavid.hashe@amd.com * the original path value. This should already be done in prior code. 91613883Sdavid.hashe@amd.com * 2) Try to handle the access using 'special_paths'. Some special_paths 91713883Sdavid.hashe@amd.com * and files cannot be called on the host and need to be handled as 91813883Sdavid.hashe@amd.com * special cases inside the simulator. These special_paths are handled by 91913883Sdavid.hashe@amd.com * C++ routines to provide output back to userspace. 92013883Sdavid.hashe@amd.com * 3) If the full path that was created above does not match any of the 92113883Sdavid.hashe@amd.com * special cases, pass it through to the open call on the __HOST__ to let 92213883Sdavid.hashe@amd.com * the host open the file on our behalf. Again, the openImpl tries to 92313883Sdavid.hashe@amd.com * USE_THE_HOST_FILESYSTEM_OPEN (with a possible redirection to the 92413883Sdavid.hashe@amd.com * faux-filesystem files). The faux-filesystem is dynamically created 92513883Sdavid.hashe@amd.com * during simulator configuration using Python functions. 92613883Sdavid.hashe@amd.com * 4) If the host cannot open the file, the open attempt failed in "3)". 92713883Sdavid.hashe@amd.com * Return the host's error code back through the system call to the 92813883Sdavid.hashe@amd.com * simulated process. If running a debug trace, also notify the user that 92913883Sdavid.hashe@amd.com * the open call failed. 93013883Sdavid.hashe@amd.com * 93113883Sdavid.hashe@amd.com * Any success will set sim_fd to something other than -1 and skip the 93213883Sdavid.hashe@amd.com * next conditions effectively bypassing them. 93311907SBrandon.Potter@amd.com */ 93411907SBrandon.Potter@amd.com int sim_fd = -1; 93513883Sdavid.hashe@amd.com std::string used_path; 93611907SBrandon.Potter@amd.com std::vector<std::string> special_paths = 93713883Sdavid.hashe@amd.com { "/proc/meminfo/", "/system/", "/sys/", "/platform/", 93813883Sdavid.hashe@amd.com "/etc/passwd" }; 93911907SBrandon.Potter@amd.com for (auto entry : special_paths) { 94013883Sdavid.hashe@amd.com if (startswith(path, entry)) { 94113883Sdavid.hashe@amd.com sim_fd = OS::openSpecialFile(abs_path, p, tc); 94213883Sdavid.hashe@amd.com used_path = abs_path; 94313883Sdavid.hashe@amd.com } 94411907SBrandon.Potter@amd.com } 94511907SBrandon.Potter@amd.com if (sim_fd == -1) { 94613883Sdavid.hashe@amd.com sim_fd = open(redir_path.c_str(), host_flags, mode); 94713883Sdavid.hashe@amd.com used_path = redir_path; 94811907SBrandon.Potter@amd.com } 94911907SBrandon.Potter@amd.com if (sim_fd == -1) { 95011907SBrandon.Potter@amd.com int local = -errno; 95113883Sdavid.hashe@amd.com DPRINTF_SYSCALL(Verbose, "open%s: failed -> path:%s " 95213883Sdavid.hashe@amd.com "(inferred from:%s)\n", isopenat ? "at" : "", 95313883Sdavid.hashe@amd.com used_path.c_str(), path.c_str()); 95411907SBrandon.Potter@amd.com return local; 95511907SBrandon.Potter@amd.com } 956360SN/A 95711907SBrandon.Potter@amd.com /** 95811907SBrandon.Potter@amd.com * The file was opened successfully and needs to be recorded in the 95911907SBrandon.Potter@amd.com * process' file descriptor array so that it can be retrieved later. 96011907SBrandon.Potter@amd.com * The target file descriptor that is chosen will be the lowest unused 96111907SBrandon.Potter@amd.com * file descriptor. 96211907SBrandon.Potter@amd.com * Return the indirect target file descriptor back to the simulated 96311907SBrandon.Potter@amd.com * process to act as a handle for the opened file. 96411907SBrandon.Potter@amd.com */ 96511907SBrandon.Potter@amd.com auto ffdp = std::make_shared<FileFDEntry>(sim_fd, host_flags, path, 0); 96611907SBrandon.Potter@amd.com int tgt_fd = p->fds->allocFD(ffdp); 96713883Sdavid.hashe@amd.com DPRINTF_SYSCALL(Verbose, "open%s: sim_fd[%d], target_fd[%d] -> path:%s\n" 96813883Sdavid.hashe@amd.com "(inferred from:%s)\n", isopenat ? "at" : "", 96913883Sdavid.hashe@amd.com sim_fd, tgt_fd, used_path.c_str(), path.c_str()); 97011907SBrandon.Potter@amd.com return tgt_fd; 971360SN/A} 972360SN/A 97310027SChris.Adeniyi-Jones@arm.com/// Target open() handler. 97410027SChris.Adeniyi-Jones@arm.comtemplate <class OS> 97510027SChris.Adeniyi-Jones@arm.comSyscallReturn 97611851Sbrandon.potter@amd.comopenFunc(SyscallDesc *desc, int callnum, Process *process, 97710027SChris.Adeniyi-Jones@arm.com ThreadContext *tc) 97810027SChris.Adeniyi-Jones@arm.com{ 97911907SBrandon.Potter@amd.com return openImpl<OS>(desc, callnum, process, tc, false); 98010027SChris.Adeniyi-Jones@arm.com} 98110027SChris.Adeniyi-Jones@arm.com 98210027SChris.Adeniyi-Jones@arm.com/// Target openat() handler. 98310027SChris.Adeniyi-Jones@arm.comtemplate <class OS> 98410027SChris.Adeniyi-Jones@arm.comSyscallReturn 98511851Sbrandon.potter@amd.comopenatFunc(SyscallDesc *desc, int callnum, Process *process, 98611851Sbrandon.potter@amd.com ThreadContext *tc) 98710027SChris.Adeniyi-Jones@arm.com{ 98811907SBrandon.Potter@amd.com return openImpl<OS>(desc, callnum, process, tc, true); 98910027SChris.Adeniyi-Jones@arm.com} 99010027SChris.Adeniyi-Jones@arm.com 99110633Smichaelupton@gmail.com/// Target unlinkat() handler. 99210633Smichaelupton@gmail.comtemplate <class OS> 99310633Smichaelupton@gmail.comSyscallReturn 99411851Sbrandon.potter@amd.comunlinkatFunc(SyscallDesc *desc, int callnum, Process *process, 99510633Smichaelupton@gmail.com ThreadContext *tc) 99610633Smichaelupton@gmail.com{ 99710633Smichaelupton@gmail.com int index = 0; 99810633Smichaelupton@gmail.com int dirfd = process->getSyscallArg(tc, index); 99910633Smichaelupton@gmail.com if (dirfd != OS::TGT_AT_FDCWD) 100010633Smichaelupton@gmail.com warn("unlinkat: first argument not AT_FDCWD; unlikely to work"); 100110633Smichaelupton@gmail.com 100210633Smichaelupton@gmail.com return unlinkHelper(desc, callnum, process, tc, 1); 100310633Smichaelupton@gmail.com} 100410633Smichaelupton@gmail.com 100510203SAli.Saidi@ARM.com/// Target facessat() handler 100610203SAli.Saidi@ARM.comtemplate <class OS> 100710203SAli.Saidi@ARM.comSyscallReturn 100811851Sbrandon.potter@amd.comfaccessatFunc(SyscallDesc *desc, int callnum, Process *process, 100911851Sbrandon.potter@amd.com ThreadContext *tc) 101010203SAli.Saidi@ARM.com{ 101110203SAli.Saidi@ARM.com int index = 0; 101210203SAli.Saidi@ARM.com int dirfd = process->getSyscallArg(tc, index); 101310203SAli.Saidi@ARM.com if (dirfd != OS::TGT_AT_FDCWD) 101410203SAli.Saidi@ARM.com warn("faccessat: first argument not AT_FDCWD; unlikely to work"); 101510203SAli.Saidi@ARM.com return accessFunc(desc, callnum, process, tc, 1); 101610203SAli.Saidi@ARM.com} 101710203SAli.Saidi@ARM.com 101810203SAli.Saidi@ARM.com/// Target readlinkat() handler 101910203SAli.Saidi@ARM.comtemplate <class OS> 102010203SAli.Saidi@ARM.comSyscallReturn 102111851Sbrandon.potter@amd.comreadlinkatFunc(SyscallDesc *desc, int callnum, Process *process, 102211851Sbrandon.potter@amd.com ThreadContext *tc) 102310203SAli.Saidi@ARM.com{ 102410203SAli.Saidi@ARM.com int index = 0; 102510203SAli.Saidi@ARM.com int dirfd = process->getSyscallArg(tc, index); 102610203SAli.Saidi@ARM.com if (dirfd != OS::TGT_AT_FDCWD) 102710203SAli.Saidi@ARM.com warn("openat: first argument not AT_FDCWD; unlikely to work"); 102810203SAli.Saidi@ARM.com return readlinkFunc(desc, callnum, process, tc, 1); 102910203SAli.Saidi@ARM.com} 103010203SAli.Saidi@ARM.com 103110850SGiacomo.Gabrielli@arm.com/// Target renameat() handler. 103210850SGiacomo.Gabrielli@arm.comtemplate <class OS> 103310850SGiacomo.Gabrielli@arm.comSyscallReturn 103411851Sbrandon.potter@amd.comrenameatFunc(SyscallDesc *desc, int callnum, Process *process, 103510850SGiacomo.Gabrielli@arm.com ThreadContext *tc) 103610850SGiacomo.Gabrielli@arm.com{ 103710850SGiacomo.Gabrielli@arm.com int index = 0; 103810850SGiacomo.Gabrielli@arm.com 103910850SGiacomo.Gabrielli@arm.com int olddirfd = process->getSyscallArg(tc, index); 104010850SGiacomo.Gabrielli@arm.com if (olddirfd != OS::TGT_AT_FDCWD) 104110850SGiacomo.Gabrielli@arm.com warn("renameat: first argument not AT_FDCWD; unlikely to work"); 104210850SGiacomo.Gabrielli@arm.com 104310850SGiacomo.Gabrielli@arm.com std::string old_name; 104410850SGiacomo.Gabrielli@arm.com 104510850SGiacomo.Gabrielli@arm.com if (!tc->getMemProxy().tryReadString(old_name, 104610850SGiacomo.Gabrielli@arm.com process->getSyscallArg(tc, index))) 104710850SGiacomo.Gabrielli@arm.com return -EFAULT; 104810850SGiacomo.Gabrielli@arm.com 104910850SGiacomo.Gabrielli@arm.com int newdirfd = process->getSyscallArg(tc, index); 105010850SGiacomo.Gabrielli@arm.com if (newdirfd != OS::TGT_AT_FDCWD) 105110850SGiacomo.Gabrielli@arm.com warn("renameat: third argument not AT_FDCWD; unlikely to work"); 105210850SGiacomo.Gabrielli@arm.com 105310850SGiacomo.Gabrielli@arm.com std::string new_name; 105410850SGiacomo.Gabrielli@arm.com 105510850SGiacomo.Gabrielli@arm.com if (!tc->getMemProxy().tryReadString(new_name, 105610850SGiacomo.Gabrielli@arm.com process->getSyscallArg(tc, index))) 105710850SGiacomo.Gabrielli@arm.com return -EFAULT; 105810850SGiacomo.Gabrielli@arm.com 105913883Sdavid.hashe@amd.com // Adjust path for cwd and redirection 106013883Sdavid.hashe@amd.com old_name = process->checkPathRedirect(old_name); 106113883Sdavid.hashe@amd.com new_name = process->checkPathRedirect(new_name); 106210850SGiacomo.Gabrielli@arm.com 106310850SGiacomo.Gabrielli@arm.com int result = rename(old_name.c_str(), new_name.c_str()); 106410850SGiacomo.Gabrielli@arm.com return (result == -1) ? -errno : result; 106510850SGiacomo.Gabrielli@arm.com} 106610850SGiacomo.Gabrielli@arm.com 10676640Svince@csl.cornell.edu/// Target sysinfo() handler. 10686640Svince@csl.cornell.edutemplate <class OS> 10696640Svince@csl.cornell.eduSyscallReturn 107011851Sbrandon.potter@amd.comsysinfoFunc(SyscallDesc *desc, int callnum, Process *process, 107111851Sbrandon.potter@amd.com ThreadContext *tc) 10726640Svince@csl.cornell.edu{ 10736640Svince@csl.cornell.edu 10746701Sgblack@eecs.umich.edu int index = 0; 10756701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::tgt_sysinfo> 107610793Sbrandon.potter@amd.com sysinfo(process->getSyscallArg(tc, index)); 10776640Svince@csl.cornell.edu 107811758Sbrandon.potter@amd.com sysinfo->uptime = seconds_since_epoch; 107911758Sbrandon.potter@amd.com sysinfo->totalram = process->system->memSize(); 108011758Sbrandon.potter@amd.com sysinfo->mem_unit = 1; 10816640Svince@csl.cornell.edu 10828706Sandreas.hansson@arm.com sysinfo.copyOut(tc->getMemProxy()); 10836640Svince@csl.cornell.edu 10846701Sgblack@eecs.umich.edu return 0; 10856640Svince@csl.cornell.edu} 1086360SN/A 10871999SN/A/// Target chmod() handler. 10881999SN/Atemplate <class OS> 10891999SN/ASyscallReturn 109011851Sbrandon.potter@amd.comchmodFunc(SyscallDesc *desc, int callnum, Process *process, 10912680Sktlim@umich.edu ThreadContext *tc) 10921999SN/A{ 10931999SN/A std::string path; 10941999SN/A 10956701Sgblack@eecs.umich.edu int index = 0; 10968852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 10976701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 10981999SN/A return -EFAULT; 10996701Sgblack@eecs.umich.edu } 11001999SN/A 11016701Sgblack@eecs.umich.edu uint32_t mode = process->getSyscallArg(tc, index); 11021999SN/A mode_t hostMode = 0; 11031999SN/A 11041999SN/A // XXX translate mode flags via OS::something??? 11051999SN/A hostMode = mode; 11061999SN/A 110713883Sdavid.hashe@amd.com // Adjust path for cwd and redirection 110813883Sdavid.hashe@amd.com path = process->checkPathRedirect(path); 11093669Sbinkertn@umich.edu 11101999SN/A // do the chmod 11111999SN/A int result = chmod(path.c_str(), hostMode); 11121999SN/A if (result < 0) 11132218SN/A return -errno; 11141999SN/A 11151999SN/A return 0; 11161999SN/A} 11171999SN/A 111813570Sbrandon.potter@amd.comtemplate <class OS> 111913570Sbrandon.potter@amd.comSyscallReturn 112013570Sbrandon.potter@amd.compollFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 112113570Sbrandon.potter@amd.com{ 112213570Sbrandon.potter@amd.com int index = 0; 112313570Sbrandon.potter@amd.com Addr fdsPtr = p->getSyscallArg(tc, index); 112413570Sbrandon.potter@amd.com int nfds = p->getSyscallArg(tc, index); 112513570Sbrandon.potter@amd.com int tmout = p->getSyscallArg(tc, index); 112613570Sbrandon.potter@amd.com 112713570Sbrandon.potter@amd.com BufferArg fdsBuf(fdsPtr, sizeof(struct pollfd) * nfds); 112813570Sbrandon.potter@amd.com fdsBuf.copyIn(tc->getMemProxy()); 112913570Sbrandon.potter@amd.com 113013570Sbrandon.potter@amd.com /** 113113570Sbrandon.potter@amd.com * Record the target file descriptors in a local variable. We need to 113213570Sbrandon.potter@amd.com * replace them with host file descriptors but we need a temporary copy 113313570Sbrandon.potter@amd.com * for later. Afterwards, replace each target file descriptor in the 113413570Sbrandon.potter@amd.com * poll_fd array with its host_fd. 113513570Sbrandon.potter@amd.com */ 113613570Sbrandon.potter@amd.com int temp_tgt_fds[nfds]; 113713570Sbrandon.potter@amd.com for (index = 0; index < nfds; index++) { 113813570Sbrandon.potter@amd.com temp_tgt_fds[index] = ((struct pollfd *)fdsBuf.bufferPtr())[index].fd; 113913570Sbrandon.potter@amd.com auto tgt_fd = temp_tgt_fds[index]; 114013570Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 114113570Sbrandon.potter@amd.com if (!hbfdp) 114213570Sbrandon.potter@amd.com return -EBADF; 114313570Sbrandon.potter@amd.com auto host_fd = hbfdp->getSimFD(); 114413570Sbrandon.potter@amd.com ((struct pollfd *)fdsBuf.bufferPtr())[index].fd = host_fd; 114513570Sbrandon.potter@amd.com } 114613570Sbrandon.potter@amd.com 114713570Sbrandon.potter@amd.com /** 114813570Sbrandon.potter@amd.com * We cannot allow an infinite poll to occur or it will inevitably cause 114913570Sbrandon.potter@amd.com * a deadlock in the gem5 simulator with clone. We must pass in tmout with 115013570Sbrandon.potter@amd.com * a non-negative value, however it also makes no sense to poll on the 115113570Sbrandon.potter@amd.com * underlying host for any other time than tmout a zero timeout. 115213570Sbrandon.potter@amd.com */ 115313570Sbrandon.potter@amd.com int status; 115413570Sbrandon.potter@amd.com if (tmout < 0) { 115513570Sbrandon.potter@amd.com status = poll((struct pollfd *)fdsBuf.bufferPtr(), nfds, 0); 115613570Sbrandon.potter@amd.com if (status == 0) { 115713570Sbrandon.potter@amd.com /** 115813570Sbrandon.potter@amd.com * If blocking indefinitely, check the signal list to see if a 115913570Sbrandon.potter@amd.com * signal would break the poll out of the retry cycle and try 116013570Sbrandon.potter@amd.com * to return the signal interrupt instead. 116113570Sbrandon.potter@amd.com */ 116213570Sbrandon.potter@amd.com System *sysh = tc->getSystemPtr(); 116313570Sbrandon.potter@amd.com std::list<BasicSignal>::iterator it; 116413570Sbrandon.potter@amd.com for (it=sysh->signalList.begin(); it!=sysh->signalList.end(); it++) 116513570Sbrandon.potter@amd.com if (it->receiver == p) 116613570Sbrandon.potter@amd.com return -EINTR; 116713570Sbrandon.potter@amd.com return SyscallReturn::retry(); 116813570Sbrandon.potter@amd.com } 116913570Sbrandon.potter@amd.com } else 117013570Sbrandon.potter@amd.com status = poll((struct pollfd *)fdsBuf.bufferPtr(), nfds, 0); 117113570Sbrandon.potter@amd.com 117213570Sbrandon.potter@amd.com if (status == -1) 117313570Sbrandon.potter@amd.com return -errno; 117413570Sbrandon.potter@amd.com 117513570Sbrandon.potter@amd.com /** 117613570Sbrandon.potter@amd.com * Replace each host_fd in the returned poll_fd array with its original 117713570Sbrandon.potter@amd.com * target file descriptor. 117813570Sbrandon.potter@amd.com */ 117913570Sbrandon.potter@amd.com for (index = 0; index < nfds; index++) { 118013570Sbrandon.potter@amd.com auto tgt_fd = temp_tgt_fds[index]; 118113570Sbrandon.potter@amd.com ((struct pollfd *)fdsBuf.bufferPtr())[index].fd = tgt_fd; 118213570Sbrandon.potter@amd.com } 118313570Sbrandon.potter@amd.com 118413570Sbrandon.potter@amd.com /** 118513570Sbrandon.potter@amd.com * Copy out the pollfd struct because the host may have updated fields 118613570Sbrandon.potter@amd.com * in the structure. 118713570Sbrandon.potter@amd.com */ 118813570Sbrandon.potter@amd.com fdsBuf.copyOut(tc->getMemProxy()); 118913570Sbrandon.potter@amd.com 119013570Sbrandon.potter@amd.com return status; 119113570Sbrandon.potter@amd.com} 11921999SN/A 11931999SN/A/// Target fchmod() handler. 11941999SN/Atemplate <class OS> 11951999SN/ASyscallReturn 119611856Sbrandon.potter@amd.comfchmodFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 11971999SN/A{ 11986701Sgblack@eecs.umich.edu int index = 0; 119911856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 120011856Sbrandon.potter@amd.com uint32_t mode = p->getSyscallArg(tc, index); 120110931Sbrandon.potter@amd.com 120211856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 120311856Sbrandon.potter@amd.com if (!ffdp) 12041999SN/A return -EBADF; 120511856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 12061999SN/A 120711856Sbrandon.potter@amd.com mode_t hostMode = mode; 12081999SN/A 120911856Sbrandon.potter@amd.com int result = fchmod(sim_fd, hostMode); 12101999SN/A 121111856Sbrandon.potter@amd.com return (result < 0) ? -errno : 0; 12121999SN/A} 12131999SN/A 12145877Shsul@eecs.umich.edu/// Target mremap() handler. 12155877Shsul@eecs.umich.edutemplate <class OS> 12165877Shsul@eecs.umich.eduSyscallReturn 121711851Sbrandon.potter@amd.commremapFunc(SyscallDesc *desc, int callnum, Process *process, ThreadContext *tc) 12185877Shsul@eecs.umich.edu{ 12196701Sgblack@eecs.umich.edu int index = 0; 12206701Sgblack@eecs.umich.edu Addr start = process->getSyscallArg(tc, index); 12216701Sgblack@eecs.umich.edu uint64_t old_length = process->getSyscallArg(tc, index); 12226701Sgblack@eecs.umich.edu uint64_t new_length = process->getSyscallArg(tc, index); 12236701Sgblack@eecs.umich.edu uint64_t flags = process->getSyscallArg(tc, index); 122410027SChris.Adeniyi-Jones@arm.com uint64_t provided_address = 0; 122510027SChris.Adeniyi-Jones@arm.com bool use_provided_address = flags & OS::TGT_MREMAP_FIXED; 122610027SChris.Adeniyi-Jones@arm.com 122710027SChris.Adeniyi-Jones@arm.com if (use_provided_address) 122810027SChris.Adeniyi-Jones@arm.com provided_address = process->getSyscallArg(tc, index); 12295877Shsul@eecs.umich.edu 123010318Sandreas.hansson@arm.com if ((start % TheISA::PageBytes != 0) || 123110318Sandreas.hansson@arm.com (provided_address % TheISA::PageBytes != 0)) { 12325877Shsul@eecs.umich.edu warn("mremap failing: arguments not page aligned"); 12335877Shsul@eecs.umich.edu return -EINVAL; 12345877Shsul@eecs.umich.edu } 12355877Shsul@eecs.umich.edu 123610486Stjablin@gmail.com new_length = roundUp(new_length, TheISA::PageBytes); 123710486Stjablin@gmail.com 12385877Shsul@eecs.umich.edu if (new_length > old_length) { 123911905SBrandon.Potter@amd.com std::shared_ptr<MemState> mem_state = process->memState; 124011905SBrandon.Potter@amd.com Addr mmap_end = mem_state->getMmapEnd(); 124111905SBrandon.Potter@amd.com 124211905SBrandon.Potter@amd.com if ((start + old_length) == mmap_end && 124310027SChris.Adeniyi-Jones@arm.com (!use_provided_address || provided_address == start)) { 124412206Srico.amslinger@informatik.uni-augsburg.de // This case cannot occur when growing downward, as 124512206Srico.amslinger@informatik.uni-augsburg.de // start is greater than or equal to mmap_end. 12465877Shsul@eecs.umich.edu uint64_t diff = new_length - old_length; 124711905SBrandon.Potter@amd.com process->allocateMem(mmap_end, diff); 124811905SBrandon.Potter@amd.com mem_state->setMmapEnd(mmap_end + diff); 12495877Shsul@eecs.umich.edu return start; 12505877Shsul@eecs.umich.edu } else { 125110027SChris.Adeniyi-Jones@arm.com if (!use_provided_address && !(flags & OS::TGT_MREMAP_MAYMOVE)) { 12525877Shsul@eecs.umich.edu warn("can't remap here and MREMAP_MAYMOVE flag not set\n"); 12535877Shsul@eecs.umich.edu return -ENOMEM; 12545877Shsul@eecs.umich.edu } else { 125512206Srico.amslinger@informatik.uni-augsburg.de uint64_t new_start = provided_address; 125612206Srico.amslinger@informatik.uni-augsburg.de if (!use_provided_address) { 125712206Srico.amslinger@informatik.uni-augsburg.de new_start = process->mmapGrowsDown() ? 125812206Srico.amslinger@informatik.uni-augsburg.de mmap_end - new_length : mmap_end; 125912206Srico.amslinger@informatik.uni-augsburg.de mmap_end = process->mmapGrowsDown() ? 126012206Srico.amslinger@informatik.uni-augsburg.de new_start : mmap_end + new_length; 126112206Srico.amslinger@informatik.uni-augsburg.de mem_state->setMmapEnd(mmap_end); 126212206Srico.amslinger@informatik.uni-augsburg.de } 126312206Srico.amslinger@informatik.uni-augsburg.de 126410027SChris.Adeniyi-Jones@arm.com process->pTable->remap(start, old_length, new_start); 126510027SChris.Adeniyi-Jones@arm.com warn("mremapping to new vaddr %08p-%08p, adding %d\n", 126610027SChris.Adeniyi-Jones@arm.com new_start, new_start + new_length, 126710027SChris.Adeniyi-Jones@arm.com new_length - old_length); 12685877Shsul@eecs.umich.edu // add on the remaining unallocated pages 126910027SChris.Adeniyi-Jones@arm.com process->allocateMem(new_start + old_length, 127010027SChris.Adeniyi-Jones@arm.com new_length - old_length, 127110027SChris.Adeniyi-Jones@arm.com use_provided_address /* clobber */); 127210027SChris.Adeniyi-Jones@arm.com if (use_provided_address && 127312206Srico.amslinger@informatik.uni-augsburg.de ((new_start + new_length > mem_state->getMmapEnd() && 127412206Srico.amslinger@informatik.uni-augsburg.de !process->mmapGrowsDown()) || 127512206Srico.amslinger@informatik.uni-augsburg.de (new_start < mem_state->getMmapEnd() && 127612206Srico.amslinger@informatik.uni-augsburg.de process->mmapGrowsDown()))) { 127710027SChris.Adeniyi-Jones@arm.com // something fishy going on here, at least notify the user 127810027SChris.Adeniyi-Jones@arm.com // @todo: increase mmap_end? 127910027SChris.Adeniyi-Jones@arm.com warn("mmap region limit exceeded with MREMAP_FIXED\n"); 128010027SChris.Adeniyi-Jones@arm.com } 128110027SChris.Adeniyi-Jones@arm.com warn("returning %08p as start\n", new_start); 128210027SChris.Adeniyi-Jones@arm.com return new_start; 12835877Shsul@eecs.umich.edu } 12845877Shsul@eecs.umich.edu } 12855877Shsul@eecs.umich.edu } else { 128610027SChris.Adeniyi-Jones@arm.com if (use_provided_address && provided_address != start) 128710027SChris.Adeniyi-Jones@arm.com process->pTable->remap(start, new_length, provided_address); 12888601Ssteve.reinhardt@amd.com process->pTable->unmap(start + new_length, old_length - new_length); 128910027SChris.Adeniyi-Jones@arm.com return use_provided_address ? provided_address : start; 12905877Shsul@eecs.umich.edu } 12915877Shsul@eecs.umich.edu} 12921999SN/A 1293378SN/A/// Target stat() handler. 1294360SN/Atemplate <class OS> 12951450SN/ASyscallReturn 129611851Sbrandon.potter@amd.comstatFunc(SyscallDesc *desc, int callnum, Process *process, 12972680Sktlim@umich.edu ThreadContext *tc) 1298360SN/A{ 1299360SN/A std::string path; 1300360SN/A 13016701Sgblack@eecs.umich.edu int index = 0; 13028852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 13036701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 13046701Sgblack@eecs.umich.edu return -EFAULT; 13056701Sgblack@eecs.umich.edu } 13066701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 1307360SN/A 130813883Sdavid.hashe@amd.com // Adjust path for cwd and redirection 130913883Sdavid.hashe@amd.com path = process->checkPathRedirect(path); 13103669Sbinkertn@umich.edu 1311360SN/A struct stat hostBuf; 1312360SN/A int result = stat(path.c_str(), &hostBuf); 1313360SN/A 1314360SN/A if (result < 0) 13152218SN/A return -errno; 1316360SN/A 13178706Sandreas.hansson@arm.com copyOutStatBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 1318360SN/A 13191458SN/A return 0; 1320360SN/A} 1321360SN/A 1322360SN/A 13235074Ssaidi@eecs.umich.edu/// Target stat64() handler. 13245074Ssaidi@eecs.umich.edutemplate <class OS> 13255074Ssaidi@eecs.umich.eduSyscallReturn 132611851Sbrandon.potter@amd.comstat64Func(SyscallDesc *desc, int callnum, Process *process, 13275074Ssaidi@eecs.umich.edu ThreadContext *tc) 13285074Ssaidi@eecs.umich.edu{ 13295074Ssaidi@eecs.umich.edu std::string path; 13305074Ssaidi@eecs.umich.edu 13316701Sgblack@eecs.umich.edu int index = 0; 13328852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 13336701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) 13345074Ssaidi@eecs.umich.edu return -EFAULT; 13356701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 13365074Ssaidi@eecs.umich.edu 133713883Sdavid.hashe@amd.com // Adjust path for cwd and redirection 133813883Sdavid.hashe@amd.com path = process->checkPathRedirect(path); 13395074Ssaidi@eecs.umich.edu 13405208Ssaidi@eecs.umich.edu#if NO_STAT64 13415208Ssaidi@eecs.umich.edu struct stat hostBuf; 13425208Ssaidi@eecs.umich.edu int result = stat(path.c_str(), &hostBuf); 13435208Ssaidi@eecs.umich.edu#else 13445074Ssaidi@eecs.umich.edu struct stat64 hostBuf; 13455074Ssaidi@eecs.umich.edu int result = stat64(path.c_str(), &hostBuf); 13465208Ssaidi@eecs.umich.edu#endif 13475074Ssaidi@eecs.umich.edu 13485074Ssaidi@eecs.umich.edu if (result < 0) 13495074Ssaidi@eecs.umich.edu return -errno; 13505074Ssaidi@eecs.umich.edu 13518706Sandreas.hansson@arm.com copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 13525074Ssaidi@eecs.umich.edu 13535074Ssaidi@eecs.umich.edu return 0; 13545074Ssaidi@eecs.umich.edu} 13555074Ssaidi@eecs.umich.edu 13565074Ssaidi@eecs.umich.edu 135710027SChris.Adeniyi-Jones@arm.com/// Target fstatat64() handler. 135810027SChris.Adeniyi-Jones@arm.comtemplate <class OS> 135910027SChris.Adeniyi-Jones@arm.comSyscallReturn 136011851Sbrandon.potter@amd.comfstatat64Func(SyscallDesc *desc, int callnum, Process *process, 136110027SChris.Adeniyi-Jones@arm.com ThreadContext *tc) 136210027SChris.Adeniyi-Jones@arm.com{ 136310027SChris.Adeniyi-Jones@arm.com int index = 0; 136410027SChris.Adeniyi-Jones@arm.com int dirfd = process->getSyscallArg(tc, index); 136510027SChris.Adeniyi-Jones@arm.com if (dirfd != OS::TGT_AT_FDCWD) 136610793Sbrandon.potter@amd.com warn("fstatat64: first argument not AT_FDCWD; unlikely to work"); 136710027SChris.Adeniyi-Jones@arm.com 136810027SChris.Adeniyi-Jones@arm.com std::string path; 136910027SChris.Adeniyi-Jones@arm.com if (!tc->getMemProxy().tryReadString(path, 137010027SChris.Adeniyi-Jones@arm.com process->getSyscallArg(tc, index))) 137110027SChris.Adeniyi-Jones@arm.com return -EFAULT; 137210027SChris.Adeniyi-Jones@arm.com Addr bufPtr = process->getSyscallArg(tc, index); 137310027SChris.Adeniyi-Jones@arm.com 137413883Sdavid.hashe@amd.com // Adjust path for cwd and redirection 137513883Sdavid.hashe@amd.com path = process->checkPathRedirect(path); 137610027SChris.Adeniyi-Jones@arm.com 137710027SChris.Adeniyi-Jones@arm.com#if NO_STAT64 137810027SChris.Adeniyi-Jones@arm.com struct stat hostBuf; 137910027SChris.Adeniyi-Jones@arm.com int result = stat(path.c_str(), &hostBuf); 138010027SChris.Adeniyi-Jones@arm.com#else 138110027SChris.Adeniyi-Jones@arm.com struct stat64 hostBuf; 138210027SChris.Adeniyi-Jones@arm.com int result = stat64(path.c_str(), &hostBuf); 138310027SChris.Adeniyi-Jones@arm.com#endif 138410027SChris.Adeniyi-Jones@arm.com 138510027SChris.Adeniyi-Jones@arm.com if (result < 0) 138610027SChris.Adeniyi-Jones@arm.com return -errno; 138710027SChris.Adeniyi-Jones@arm.com 138810027SChris.Adeniyi-Jones@arm.com copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 138910027SChris.Adeniyi-Jones@arm.com 139010027SChris.Adeniyi-Jones@arm.com return 0; 139110027SChris.Adeniyi-Jones@arm.com} 139210027SChris.Adeniyi-Jones@arm.com 139310027SChris.Adeniyi-Jones@arm.com 13941999SN/A/// Target fstat64() handler. 13951999SN/Atemplate <class OS> 13961999SN/ASyscallReturn 139711856Sbrandon.potter@amd.comfstat64Func(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 13981999SN/A{ 13996701Sgblack@eecs.umich.edu int index = 0; 140011856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 140111856Sbrandon.potter@amd.com Addr bufPtr = p->getSyscallArg(tc, index); 140210931Sbrandon.potter@amd.com 140311856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 140411856Sbrandon.potter@amd.com if (!ffdp) 14051999SN/A return -EBADF; 140611856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 14071999SN/A 14082764Sstever@eecs.umich.edu#if NO_STAT64 14092064SN/A struct stat hostBuf; 141010931Sbrandon.potter@amd.com int result = fstat(sim_fd, &hostBuf); 14112064SN/A#else 14122064SN/A struct stat64 hostBuf; 141310931Sbrandon.potter@amd.com int result = fstat64(sim_fd, &hostBuf); 14142064SN/A#endif 14151999SN/A 14161999SN/A if (result < 0) 14172218SN/A return -errno; 14181999SN/A 141910931Sbrandon.potter@amd.com copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf, (sim_fd == 1)); 14201999SN/A 14211999SN/A return 0; 14221999SN/A} 14231999SN/A 14241999SN/A 1425378SN/A/// Target lstat() handler. 1426360SN/Atemplate <class OS> 14271450SN/ASyscallReturn 142811851Sbrandon.potter@amd.comlstatFunc(SyscallDesc *desc, int callnum, Process *process, 14292680Sktlim@umich.edu ThreadContext *tc) 1430360SN/A{ 1431360SN/A std::string path; 1432360SN/A 14336701Sgblack@eecs.umich.edu int index = 0; 14348852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 14356701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 14366701Sgblack@eecs.umich.edu return -EFAULT; 14376701Sgblack@eecs.umich.edu } 14386701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 1439360SN/A 144013883Sdavid.hashe@amd.com // Adjust path for cwd and redirection 144113883Sdavid.hashe@amd.com path = process->checkPathRedirect(path); 14423669Sbinkertn@umich.edu 1443360SN/A struct stat hostBuf; 1444360SN/A int result = lstat(path.c_str(), &hostBuf); 1445360SN/A 1446360SN/A if (result < 0) 14471458SN/A return -errno; 1448360SN/A 14498706Sandreas.hansson@arm.com copyOutStatBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 1450360SN/A 14511458SN/A return 0; 1452360SN/A} 1453360SN/A 14541999SN/A/// Target lstat64() handler. 14551999SN/Atemplate <class OS> 14561999SN/ASyscallReturn 145711851Sbrandon.potter@amd.comlstat64Func(SyscallDesc *desc, int callnum, Process *process, 14582680Sktlim@umich.edu ThreadContext *tc) 14591999SN/A{ 14601999SN/A std::string path; 14611999SN/A 14626701Sgblack@eecs.umich.edu int index = 0; 14638852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 14646701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 14656701Sgblack@eecs.umich.edu return -EFAULT; 14666701Sgblack@eecs.umich.edu } 14676701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 14681999SN/A 146913883Sdavid.hashe@amd.com // Adjust path for cwd and redirection 147013883Sdavid.hashe@amd.com path = process->checkPathRedirect(path); 14713669Sbinkertn@umich.edu 14722764Sstever@eecs.umich.edu#if NO_STAT64 14732064SN/A struct stat hostBuf; 14742064SN/A int result = lstat(path.c_str(), &hostBuf); 14752064SN/A#else 14761999SN/A struct stat64 hostBuf; 14771999SN/A int result = lstat64(path.c_str(), &hostBuf); 14782064SN/A#endif 14791999SN/A 14801999SN/A if (result < 0) 14811999SN/A return -errno; 14821999SN/A 14838706Sandreas.hansson@arm.com copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 14841999SN/A 14851999SN/A return 0; 14861999SN/A} 14871999SN/A 1488378SN/A/// Target fstat() handler. 1489360SN/Atemplate <class OS> 14901450SN/ASyscallReturn 149111856Sbrandon.potter@amd.comfstatFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 1492360SN/A{ 14936701Sgblack@eecs.umich.edu int index = 0; 149411856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 149511856Sbrandon.potter@amd.com Addr bufPtr = p->getSyscallArg(tc, index); 1496360SN/A 149711380Salexandru.dutu@amd.com DPRINTF_SYSCALL(Verbose, "fstat(%d, ...)\n", tgt_fd); 1498360SN/A 149911856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 150011856Sbrandon.potter@amd.com if (!ffdp) 15011458SN/A return -EBADF; 150211856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 1503360SN/A 1504360SN/A struct stat hostBuf; 150510931Sbrandon.potter@amd.com int result = fstat(sim_fd, &hostBuf); 1506360SN/A 1507360SN/A if (result < 0) 15081458SN/A return -errno; 1509360SN/A 151010931Sbrandon.potter@amd.com copyOutStatBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf, (sim_fd == 1)); 15112021SN/A 15121458SN/A return 0; 1513360SN/A} 1514360SN/A 15151706SN/A/// Target statfs() handler. 15161706SN/Atemplate <class OS> 15171706SN/ASyscallReturn 151811851Sbrandon.potter@amd.comstatfsFunc(SyscallDesc *desc, int callnum, Process *process, 15192680Sktlim@umich.edu ThreadContext *tc) 15201706SN/A{ 152113936SAndrea.Mondelli@ucf.edu#if defined(__linux__) 15221706SN/A std::string path; 15231706SN/A 15246701Sgblack@eecs.umich.edu int index = 0; 15258852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 15266701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 15276701Sgblack@eecs.umich.edu return -EFAULT; 15286701Sgblack@eecs.umich.edu } 15296701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 15301706SN/A 153113883Sdavid.hashe@amd.com // Adjust path for cwd and redirection 153213883Sdavid.hashe@amd.com path = process->checkPathRedirect(path); 15333669Sbinkertn@umich.edu 15341706SN/A struct statfs hostBuf; 15351706SN/A int result = statfs(path.c_str(), &hostBuf); 15361706SN/A 15371706SN/A if (result < 0) 15382218SN/A return -errno; 15391706SN/A 154011759Sbrandon.potter@amd.com copyOutStatfsBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 154113933Sbrandon.potter@amd.com return 0; 154213933Sbrandon.potter@amd.com#else 154313933Sbrandon.potter@amd.com warnUnsupportedOS("statfs"); 154413933Sbrandon.potter@amd.com return -1; 154511799Sbrandon.potter@amd.com#endif 15461706SN/A} 15471706SN/A 154811886Sbrandon.potter@amd.comtemplate <class OS> 154911886Sbrandon.potter@amd.comSyscallReturn 155011886Sbrandon.potter@amd.comcloneFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 155111886Sbrandon.potter@amd.com{ 155211886Sbrandon.potter@amd.com int index = 0; 155312426Sqtt2@cornell.edu 155413557Sgabeblack@google.com RegVal flags = p->getSyscallArg(tc, index); 155513557Sgabeblack@google.com RegVal newStack = p->getSyscallArg(tc, index); 155611886Sbrandon.potter@amd.com Addr ptidPtr = p->getSyscallArg(tc, index); 155712426Sqtt2@cornell.edu 155813534Sandreas.sandberg@arm.com#if THE_ISA == RISCV_ISA or THE_ISA == ARM_ISA 155912426Sqtt2@cornell.edu /** 156013534Sandreas.sandberg@arm.com * Linux sets CLONE_BACKWARDS flag for RISC-V and Arm. 156112426Sqtt2@cornell.edu * The flag defines the list of clone() arguments in the following 156212426Sqtt2@cornell.edu * order: flags -> newStack -> ptidPtr -> tlsPtr -> ctidPtr 156312426Sqtt2@cornell.edu */ 156413536Sandreas.sandberg@arm.com Addr tlsPtr = p->getSyscallArg(tc, index); 156512426Sqtt2@cornell.edu Addr ctidPtr = p->getSyscallArg(tc, index); 156612426Sqtt2@cornell.edu#else 156711886Sbrandon.potter@amd.com Addr ctidPtr = p->getSyscallArg(tc, index); 156813536Sandreas.sandberg@arm.com Addr tlsPtr = p->getSyscallArg(tc, index); 156912426Sqtt2@cornell.edu#endif 157011886Sbrandon.potter@amd.com 157111886Sbrandon.potter@amd.com if (((flags & OS::TGT_CLONE_SIGHAND)&& !(flags & OS::TGT_CLONE_VM)) || 157211886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_THREAD) && !(flags & OS::TGT_CLONE_SIGHAND)) || 157311886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_FS) && (flags & OS::TGT_CLONE_NEWNS)) || 157411886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_NEWIPC) && (flags & OS::TGT_CLONE_SYSVSEM)) || 157511886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_NEWPID) && (flags & OS::TGT_CLONE_THREAD)) || 157611886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_VM) && !(newStack))) 157711886Sbrandon.potter@amd.com return -EINVAL; 157811886Sbrandon.potter@amd.com 157911886Sbrandon.potter@amd.com ThreadContext *ctc; 158013649Sqtt2@cornell.edu if (!(ctc = p->findFreeContext())) { 158113649Sqtt2@cornell.edu DPRINTF_SYSCALL(Verbose, "clone: no spare thread context in system" 158213649Sqtt2@cornell.edu "[cpu %d, thread %d]", tc->cpuId(), tc->threadId()); 158313649Sqtt2@cornell.edu return -EAGAIN; 158413649Sqtt2@cornell.edu } 158511886Sbrandon.potter@amd.com 158611886Sbrandon.potter@amd.com /** 158711886Sbrandon.potter@amd.com * Note that ProcessParams is generated by swig and there are no other 158811886Sbrandon.potter@amd.com * examples of how to create anything but this default constructor. The 158911886Sbrandon.potter@amd.com * fields are manually initialized instead of passing parameters to the 159011886Sbrandon.potter@amd.com * constructor. 159111886Sbrandon.potter@amd.com */ 159211886Sbrandon.potter@amd.com ProcessParams *pp = new ProcessParams(); 159311886Sbrandon.potter@amd.com pp->executable.assign(*(new std::string(p->progName()))); 159411886Sbrandon.potter@amd.com pp->cmd.push_back(*(new std::string(p->progName()))); 159511886Sbrandon.potter@amd.com pp->system = p->system; 159613883Sdavid.hashe@amd.com pp->cwd.assign(p->tgtCwd); 159711886Sbrandon.potter@amd.com pp->input.assign("stdin"); 159811886Sbrandon.potter@amd.com pp->output.assign("stdout"); 159911886Sbrandon.potter@amd.com pp->errout.assign("stderr"); 160011886Sbrandon.potter@amd.com pp->uid = p->uid(); 160111886Sbrandon.potter@amd.com pp->euid = p->euid(); 160211886Sbrandon.potter@amd.com pp->gid = p->gid(); 160311886Sbrandon.potter@amd.com pp->egid = p->egid(); 160411886Sbrandon.potter@amd.com 160511886Sbrandon.potter@amd.com /* Find the first free PID that's less than the maximum */ 160611886Sbrandon.potter@amd.com std::set<int> const& pids = p->system->PIDs; 160711886Sbrandon.potter@amd.com int temp_pid = *pids.begin(); 160811886Sbrandon.potter@amd.com do { 160911886Sbrandon.potter@amd.com temp_pid++; 161011886Sbrandon.potter@amd.com } while (pids.find(temp_pid) != pids.end()); 161111886Sbrandon.potter@amd.com if (temp_pid >= System::maxPID) 161211886Sbrandon.potter@amd.com fatal("temp_pid is too large: %d", temp_pid); 161311886Sbrandon.potter@amd.com 161411886Sbrandon.potter@amd.com pp->pid = temp_pid; 161511886Sbrandon.potter@amd.com pp->ppid = (flags & OS::TGT_CLONE_THREAD) ? p->ppid() : p->pid(); 161613867Salexandru.dutu@amd.com pp->useArchPT = p->useArchPT; 161713867Salexandru.dutu@amd.com pp->kvmInSE = p->kvmInSE; 161811886Sbrandon.potter@amd.com Process *cp = pp->create(); 161911886Sbrandon.potter@amd.com delete pp; 162011886Sbrandon.potter@amd.com 162111886Sbrandon.potter@amd.com Process *owner = ctc->getProcessPtr(); 162211886Sbrandon.potter@amd.com ctc->setProcessPtr(cp); 162311886Sbrandon.potter@amd.com cp->assignThreadContext(ctc->contextId()); 162411886Sbrandon.potter@amd.com owner->revokeThreadContext(ctc->contextId()); 162511886Sbrandon.potter@amd.com 162611886Sbrandon.potter@amd.com if (flags & OS::TGT_CLONE_PARENT_SETTID) { 162711886Sbrandon.potter@amd.com BufferArg ptidBuf(ptidPtr, sizeof(long)); 162811886Sbrandon.potter@amd.com long *ptid = (long *)ptidBuf.bufferPtr(); 162911886Sbrandon.potter@amd.com *ptid = cp->pid(); 163011886Sbrandon.potter@amd.com ptidBuf.copyOut(tc->getMemProxy()); 163111886Sbrandon.potter@amd.com } 163211886Sbrandon.potter@amd.com 163313867Salexandru.dutu@amd.com if (flags & OS::TGT_CLONE_THREAD) { 163413867Salexandru.dutu@amd.com cp->pTable->shared = true; 163513867Salexandru.dutu@amd.com cp->useForClone = true; 163613867Salexandru.dutu@amd.com } 163711886Sbrandon.potter@amd.com cp->initState(); 163811886Sbrandon.potter@amd.com p->clone(tc, ctc, cp, flags); 163911886Sbrandon.potter@amd.com 164011911SBrandon.Potter@amd.com if (flags & OS::TGT_CLONE_THREAD) { 164111911SBrandon.Potter@amd.com delete cp->sigchld; 164211911SBrandon.Potter@amd.com cp->sigchld = p->sigchld; 164311911SBrandon.Potter@amd.com } else if (flags & OS::TGT_SIGCHLD) { 164411911SBrandon.Potter@amd.com *cp->sigchld = true; 164511911SBrandon.Potter@amd.com } 164611911SBrandon.Potter@amd.com 164711886Sbrandon.potter@amd.com if (flags & OS::TGT_CLONE_CHILD_SETTID) { 164811886Sbrandon.potter@amd.com BufferArg ctidBuf(ctidPtr, sizeof(long)); 164911886Sbrandon.potter@amd.com long *ctid = (long *)ctidBuf.bufferPtr(); 165011886Sbrandon.potter@amd.com *ctid = cp->pid(); 165111886Sbrandon.potter@amd.com ctidBuf.copyOut(ctc->getMemProxy()); 165211886Sbrandon.potter@amd.com } 165311886Sbrandon.potter@amd.com 165411886Sbrandon.potter@amd.com if (flags & OS::TGT_CLONE_CHILD_CLEARTID) 165511886Sbrandon.potter@amd.com cp->childClearTID = (uint64_t)ctidPtr; 165611886Sbrandon.potter@amd.com 165711886Sbrandon.potter@amd.com ctc->clearArchRegs(); 165811886Sbrandon.potter@amd.com 165913536Sandreas.sandberg@arm.com OS::archClone(flags, p, cp, tc, ctc, newStack, tlsPtr); 166011886Sbrandon.potter@amd.com 166111886Sbrandon.potter@amd.com cp->setSyscallReturn(ctc, 0); 166211886Sbrandon.potter@amd.com 166311886Sbrandon.potter@amd.com#if THE_ISA == ALPHA_ISA 166411886Sbrandon.potter@amd.com ctc->setIntReg(TheISA::SyscallSuccessReg, 0); 166511886Sbrandon.potter@amd.com#elif THE_ISA == SPARC_ISA 166611886Sbrandon.potter@amd.com tc->setIntReg(TheISA::SyscallPseudoReturnReg, 0); 166711886Sbrandon.potter@amd.com ctc->setIntReg(TheISA::SyscallPseudoReturnReg, 1); 166811886Sbrandon.potter@amd.com#endif 166911886Sbrandon.potter@amd.com 167013867Salexandru.dutu@amd.com if (p->kvmInSE) { 167113867Salexandru.dutu@amd.com#if THE_ISA == X86_ISA 167213867Salexandru.dutu@amd.com ctc->pcState(tc->readIntReg(TheISA::INTREG_RCX)); 167313867Salexandru.dutu@amd.com#else 167413867Salexandru.dutu@amd.com panic("KVM CPU model is not supported for this ISA"); 167513867Salexandru.dutu@amd.com#endif 167613867Salexandru.dutu@amd.com } else { 167713867Salexandru.dutu@amd.com TheISA::PCState cpc = tc->pcState(); 167813867Salexandru.dutu@amd.com cpc.advance(); 167913867Salexandru.dutu@amd.com ctc->pcState(cpc); 168013867Salexandru.dutu@amd.com } 168111886Sbrandon.potter@amd.com ctc->activate(); 168211886Sbrandon.potter@amd.com 168311886Sbrandon.potter@amd.com return cp->pid(); 168411886Sbrandon.potter@amd.com} 16851706SN/A 16861706SN/A/// Target fstatfs() handler. 16871706SN/Atemplate <class OS> 16881706SN/ASyscallReturn 168911856Sbrandon.potter@amd.comfstatfsFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 16901706SN/A{ 16916701Sgblack@eecs.umich.edu int index = 0; 169211856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 169311856Sbrandon.potter@amd.com Addr bufPtr = p->getSyscallArg(tc, index); 16941706SN/A 169511856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 169611856Sbrandon.potter@amd.com if (!ffdp) 16971706SN/A return -EBADF; 169811856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 16991706SN/A 17001706SN/A struct statfs hostBuf; 170110931Sbrandon.potter@amd.com int result = fstatfs(sim_fd, &hostBuf); 17021706SN/A 17031706SN/A if (result < 0) 17042218SN/A return -errno; 17051706SN/A 170611759Sbrandon.potter@amd.com copyOutStatfsBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 17071706SN/A 17081706SN/A return 0; 17091706SN/A} 17101706SN/A 171113572Sbrandon.potter@amd.com/// Target readv() handler. 171213572Sbrandon.potter@amd.comtemplate <class OS> 171313572Sbrandon.potter@amd.comSyscallReturn 171413572Sbrandon.potter@amd.comreadvFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 171513572Sbrandon.potter@amd.com{ 171613572Sbrandon.potter@amd.com int index = 0; 171713572Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 171813572Sbrandon.potter@amd.com 171913572Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 172013572Sbrandon.potter@amd.com if (!ffdp) 172113572Sbrandon.potter@amd.com return -EBADF; 172213572Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 172313572Sbrandon.potter@amd.com 172413572Sbrandon.potter@amd.com SETranslatingPortProxy &prox = tc->getMemProxy(); 172513572Sbrandon.potter@amd.com uint64_t tiov_base = p->getSyscallArg(tc, index); 172613572Sbrandon.potter@amd.com size_t count = p->getSyscallArg(tc, index); 172713572Sbrandon.potter@amd.com typename OS::tgt_iovec tiov[count]; 172813572Sbrandon.potter@amd.com struct iovec hiov[count]; 172913572Sbrandon.potter@amd.com for (size_t i = 0; i < count; ++i) { 173013572Sbrandon.potter@amd.com prox.readBlob(tiov_base + (i * sizeof(typename OS::tgt_iovec)), 173113572Sbrandon.potter@amd.com (uint8_t*)&tiov[i], sizeof(typename OS::tgt_iovec)); 173213572Sbrandon.potter@amd.com hiov[i].iov_len = TheISA::gtoh(tiov[i].iov_len); 173313572Sbrandon.potter@amd.com hiov[i].iov_base = new char [hiov[i].iov_len]; 173413572Sbrandon.potter@amd.com } 173513572Sbrandon.potter@amd.com 173613572Sbrandon.potter@amd.com int result = readv(sim_fd, hiov, count); 173713572Sbrandon.potter@amd.com int local_errno = errno; 173813572Sbrandon.potter@amd.com 173913572Sbrandon.potter@amd.com for (size_t i = 0; i < count; ++i) { 174013572Sbrandon.potter@amd.com if (result != -1) { 174113572Sbrandon.potter@amd.com prox.writeBlob(TheISA::htog(tiov[i].iov_base), 174213572Sbrandon.potter@amd.com (uint8_t*)hiov[i].iov_base, hiov[i].iov_len); 174313572Sbrandon.potter@amd.com } 174413572Sbrandon.potter@amd.com delete [] (char *)hiov[i].iov_base; 174513572Sbrandon.potter@amd.com } 174613572Sbrandon.potter@amd.com 174713572Sbrandon.potter@amd.com return (result == -1) ? -local_errno : result; 174813572Sbrandon.potter@amd.com} 17491706SN/A 17501999SN/A/// Target writev() handler. 17511999SN/Atemplate <class OS> 17521999SN/ASyscallReturn 175311856Sbrandon.potter@amd.comwritevFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 17541999SN/A{ 17556701Sgblack@eecs.umich.edu int index = 0; 175611856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 175710931Sbrandon.potter@amd.com 175811856Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 175911856Sbrandon.potter@amd.com if (!hbfdp) 17601999SN/A return -EBADF; 176111856Sbrandon.potter@amd.com int sim_fd = hbfdp->getSimFD(); 17621999SN/A 176311856Sbrandon.potter@amd.com SETranslatingPortProxy &prox = tc->getMemProxy(); 176411856Sbrandon.potter@amd.com uint64_t tiov_base = p->getSyscallArg(tc, index); 176511856Sbrandon.potter@amd.com size_t count = p->getSyscallArg(tc, index); 17661999SN/A struct iovec hiov[count]; 17676227Snate@binkert.org for (size_t i = 0; i < count; ++i) { 17681999SN/A typename OS::tgt_iovec tiov; 17692461SN/A 177011856Sbrandon.potter@amd.com prox.readBlob(tiov_base + i*sizeof(typename OS::tgt_iovec), 177111856Sbrandon.potter@amd.com (uint8_t*)&tiov, sizeof(typename OS::tgt_iovec)); 17728737Skoansin.tan@gmail.com hiov[i].iov_len = TheISA::gtoh(tiov.iov_len); 17731999SN/A hiov[i].iov_base = new char [hiov[i].iov_len]; 177411856Sbrandon.potter@amd.com prox.readBlob(TheISA::gtoh(tiov.iov_base), (uint8_t *)hiov[i].iov_base, 177511856Sbrandon.potter@amd.com hiov[i].iov_len); 17761999SN/A } 17771999SN/A 177810931Sbrandon.potter@amd.com int result = writev(sim_fd, hiov, count); 17791999SN/A 17806227Snate@binkert.org for (size_t i = 0; i < count; ++i) 17811999SN/A delete [] (char *)hiov[i].iov_base; 17821999SN/A 178313572Sbrandon.potter@amd.com return (result == -1) ? -errno : result; 17841999SN/A} 17851999SN/A 178611385Sbrandon.potter@amd.com/// Real mmap handler. 1787360SN/Atemplate <class OS> 17881450SN/ASyscallReturn 178911851Sbrandon.potter@amd.commmapImpl(SyscallDesc *desc, int num, Process *p, ThreadContext *tc, 179011385Sbrandon.potter@amd.com bool is_mmap2) 1791360SN/A{ 17926701Sgblack@eecs.umich.edu int index = 0; 17936701Sgblack@eecs.umich.edu Addr start = p->getSyscallArg(tc, index); 17946701Sgblack@eecs.umich.edu uint64_t length = p->getSyscallArg(tc, index); 179511383Sbrandon.potter@amd.com int prot = p->getSyscallArg(tc, index); 179611383Sbrandon.potter@amd.com int tgt_flags = p->getSyscallArg(tc, index); 17978324Ssteve.reinhardt@amd.com int tgt_fd = p->getSyscallArg(tc, index); 179810486Stjablin@gmail.com int offset = p->getSyscallArg(tc, index); 1799360SN/A 180011385Sbrandon.potter@amd.com if (is_mmap2) 180111385Sbrandon.potter@amd.com offset *= TheISA::PageBytes; 18029008Sgblack@eecs.umich.edu 180311383Sbrandon.potter@amd.com if (start & (TheISA::PageBytes - 1) || 180411383Sbrandon.potter@amd.com offset & (TheISA::PageBytes - 1) || 180511383Sbrandon.potter@amd.com (tgt_flags & OS::TGT_MAP_PRIVATE && 180611383Sbrandon.potter@amd.com tgt_flags & OS::TGT_MAP_SHARED) || 180711383Sbrandon.potter@amd.com (!(tgt_flags & OS::TGT_MAP_PRIVATE) && 180811383Sbrandon.potter@amd.com !(tgt_flags & OS::TGT_MAP_SHARED)) || 180911383Sbrandon.potter@amd.com !length) { 181011383Sbrandon.potter@amd.com return -EINVAL; 181111383Sbrandon.potter@amd.com } 18128324Ssteve.reinhardt@amd.com 181311383Sbrandon.potter@amd.com if ((prot & PROT_WRITE) && (tgt_flags & OS::TGT_MAP_SHARED)) { 181411383Sbrandon.potter@amd.com // With shared mmaps, there are two cases to consider: 181511383Sbrandon.potter@amd.com // 1) anonymous: writes should modify the mapping and this should be 181611383Sbrandon.potter@amd.com // visible to observers who share the mapping. Currently, it's 181711383Sbrandon.potter@amd.com // difficult to update the shared mapping because there's no 181811383Sbrandon.potter@amd.com // structure which maintains information about the which virtual 181911383Sbrandon.potter@amd.com // memory areas are shared. If that structure existed, it would be 182011383Sbrandon.potter@amd.com // possible to make the translations point to the same frames. 182111383Sbrandon.potter@amd.com // 2) file-backed: writes should modify the mapping and the file 182211383Sbrandon.potter@amd.com // which is backed by the mapping. The shared mapping problem is the 182311383Sbrandon.potter@amd.com // same as what was mentioned about the anonymous mappings. For 182411383Sbrandon.potter@amd.com // file-backed mappings, the writes to the file are difficult 182511383Sbrandon.potter@amd.com // because it requires syncing what the mapping holds with the file 182611383Sbrandon.potter@amd.com // that resides on the host system. So, any write on a real system 182711383Sbrandon.potter@amd.com // would cause the change to be propagated to the file mapping at 182811383Sbrandon.potter@amd.com // some point in the future (the inode is tracked along with the 182911383Sbrandon.potter@amd.com // mapping). This isn't guaranteed to always happen, but it usually 183011383Sbrandon.potter@amd.com // works well enough. The guarantee is provided by the msync system 183111383Sbrandon.potter@amd.com // call. We could force the change through with shared mappings with 183211383Sbrandon.potter@amd.com // a call to msync, but that again would require more information 183311383Sbrandon.potter@amd.com // than we currently maintain. 183411383Sbrandon.potter@amd.com warn("mmap: writing to shared mmap region is currently " 183511383Sbrandon.potter@amd.com "unsupported. The write succeeds on the target, but it " 183611383Sbrandon.potter@amd.com "will not be propagated to the host or shared mappings"); 18378324Ssteve.reinhardt@amd.com } 18385877Shsul@eecs.umich.edu 183910486Stjablin@gmail.com length = roundUp(length, TheISA::PageBytes); 184010486Stjablin@gmail.com 184111383Sbrandon.potter@amd.com int sim_fd = -1; 184211383Sbrandon.potter@amd.com uint8_t *pmap = nullptr; 184311383Sbrandon.potter@amd.com if (!(tgt_flags & OS::TGT_MAP_ANONYMOUS)) { 184411856Sbrandon.potter@amd.com std::shared_ptr<FDEntry> fdep = (*p->fds)[tgt_fd]; 184511624Smichael.lebeane@amd.com 184611856Sbrandon.potter@amd.com auto dfdp = std::dynamic_pointer_cast<DeviceFDEntry>(fdep); 184711856Sbrandon.potter@amd.com if (dfdp) { 184811856Sbrandon.potter@amd.com EmulatedDriver *emul_driver = dfdp->getDriver(); 184911856Sbrandon.potter@amd.com return emul_driver->mmap(p, tc, start, length, prot, 185011624Smichael.lebeane@amd.com tgt_flags, tgt_fd, offset); 185111624Smichael.lebeane@amd.com } 185211624Smichael.lebeane@amd.com 185311856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(fdep); 185411856Sbrandon.potter@amd.com if (!ffdp) 185511383Sbrandon.potter@amd.com return -EBADF; 185611856Sbrandon.potter@amd.com sim_fd = ffdp->getSimFD(); 1857360SN/A 185811913SBrandon.Potter@amd.com pmap = (decltype(pmap))mmap(nullptr, length, PROT_READ, MAP_PRIVATE, 185911383Sbrandon.potter@amd.com sim_fd, offset); 18608600Ssteve.reinhardt@amd.com 186111383Sbrandon.potter@amd.com if (pmap == (decltype(pmap))-1) { 186211383Sbrandon.potter@amd.com warn("mmap: failed to map file into host address space"); 186311383Sbrandon.potter@amd.com return -errno; 18648600Ssteve.reinhardt@amd.com } 18652544SN/A } 18662544SN/A 186711383Sbrandon.potter@amd.com // Extend global mmap region if necessary. Note that we ignore the 186811383Sbrandon.potter@amd.com // start address unless MAP_FIXED is specified. 186911383Sbrandon.potter@amd.com if (!(tgt_flags & OS::TGT_MAP_FIXED)) { 187011905SBrandon.Potter@amd.com std::shared_ptr<MemState> mem_state = p->memState; 187111905SBrandon.Potter@amd.com Addr mmap_end = mem_state->getMmapEnd(); 187211905SBrandon.Potter@amd.com 187311905SBrandon.Potter@amd.com start = p->mmapGrowsDown() ? mmap_end - length : mmap_end; 187411905SBrandon.Potter@amd.com mmap_end = p->mmapGrowsDown() ? start : mmap_end + length; 187511905SBrandon.Potter@amd.com 187611905SBrandon.Potter@amd.com mem_state->setMmapEnd(mmap_end); 187711383Sbrandon.potter@amd.com } 187811383Sbrandon.potter@amd.com 187911383Sbrandon.potter@amd.com DPRINTF_SYSCALL(Verbose, " mmap range is 0x%x - 0x%x\n", 188011383Sbrandon.potter@amd.com start, start + length - 1); 188111383Sbrandon.potter@amd.com 188211383Sbrandon.potter@amd.com // We only allow mappings to overwrite existing mappings if 188311383Sbrandon.potter@amd.com // TGT_MAP_FIXED is set. Otherwise it shouldn't be a problem 188411383Sbrandon.potter@amd.com // because we ignore the start hint if TGT_MAP_FIXED is not set. 188511383Sbrandon.potter@amd.com int clobber = tgt_flags & OS::TGT_MAP_FIXED; 188611383Sbrandon.potter@amd.com if (clobber) { 188711383Sbrandon.potter@amd.com for (auto tc : p->system->threadContexts) { 188811383Sbrandon.potter@amd.com // If we might be overwriting old mappings, we need to 188911383Sbrandon.potter@amd.com // invalidate potentially stale mappings out of the TLBs. 189011383Sbrandon.potter@amd.com tc->getDTBPtr()->flushAll(); 189111383Sbrandon.potter@amd.com tc->getITBPtr()->flushAll(); 18928600Ssteve.reinhardt@amd.com } 18936672Sgblack@eecs.umich.edu } 18948600Ssteve.reinhardt@amd.com 189511383Sbrandon.potter@amd.com // Allocate physical memory and map it in. If the page table is already 189611383Sbrandon.potter@amd.com // mapped and clobber is not set, the simulator will issue throw a 189711383Sbrandon.potter@amd.com // fatal and bail out of the simulation. 18988601Ssteve.reinhardt@amd.com p->allocateMem(start, length, clobber); 18992544SN/A 190011383Sbrandon.potter@amd.com // Transfer content into target address space. 190111383Sbrandon.potter@amd.com SETranslatingPortProxy &tp = tc->getMemProxy(); 190211383Sbrandon.potter@amd.com if (tgt_flags & OS::TGT_MAP_ANONYMOUS) { 190311383Sbrandon.potter@amd.com // In general, we should zero the mapped area for anonymous mappings, 190411383Sbrandon.potter@amd.com // with something like: 190511383Sbrandon.potter@amd.com // tp.memsetBlob(start, 0, length); 190611383Sbrandon.potter@amd.com // However, given that we don't support sparse mappings, and 190711383Sbrandon.potter@amd.com // some applications can map a couple of gigabytes of space 190811383Sbrandon.potter@amd.com // (intending sparse usage), that can get painfully expensive. 190911383Sbrandon.potter@amd.com // Fortunately, since we don't properly implement munmap either, 191011383Sbrandon.potter@amd.com // there's no danger of remapping used memory, so for now all 191111383Sbrandon.potter@amd.com // newly mapped memory should already be zeroed so we can skip it. 191211383Sbrandon.potter@amd.com } else { 191311383Sbrandon.potter@amd.com // It is possible to mmap an area larger than a file, however 191411383Sbrandon.potter@amd.com // accessing unmapped portions the system triggers a "Bus error" 191511383Sbrandon.potter@amd.com // on the host. We must know when to stop copying the file from 191611383Sbrandon.potter@amd.com // the host into the target address space. 191711383Sbrandon.potter@amd.com struct stat file_stat; 191811383Sbrandon.potter@amd.com if (fstat(sim_fd, &file_stat) > 0) 191911383Sbrandon.potter@amd.com fatal("mmap: cannot stat file"); 192011383Sbrandon.potter@amd.com 192111383Sbrandon.potter@amd.com // Copy the portion of the file that is resident. This requires 192211383Sbrandon.potter@amd.com // checking both the mmap size and the filesize that we are 192311383Sbrandon.potter@amd.com // trying to mmap into this space; the mmap size also depends 192411383Sbrandon.potter@amd.com // on the specified offset into the file. 192511383Sbrandon.potter@amd.com uint64_t size = std::min((uint64_t)file_stat.st_size - offset, 192611383Sbrandon.potter@amd.com length); 192711383Sbrandon.potter@amd.com tp.writeBlob(start, pmap, size); 192811383Sbrandon.potter@amd.com 192911383Sbrandon.potter@amd.com // Cleanup the mmap region before exiting this function. 193011383Sbrandon.potter@amd.com munmap(pmap, length); 193111383Sbrandon.potter@amd.com 193211392Sbrandon.potter@amd.com // Maintain the symbol table for dynamic executables. 193311392Sbrandon.potter@amd.com // The loader will call mmap to map the images into its address 193411392Sbrandon.potter@amd.com // space and we intercept that here. We can verify that we are 193511392Sbrandon.potter@amd.com // executing inside the loader by checking the program counter value. 193611392Sbrandon.potter@amd.com // XXX: with multiprogrammed workloads or multi-node configurations, 193711392Sbrandon.potter@amd.com // this will not work since there is a single global symbol table. 193811392Sbrandon.potter@amd.com ObjectFile *interpreter = p->getInterpreter(); 193911392Sbrandon.potter@amd.com if (interpreter) { 194011392Sbrandon.potter@amd.com Addr text_start = interpreter->textBase(); 194111392Sbrandon.potter@amd.com Addr text_end = text_start + interpreter->textSize(); 194211392Sbrandon.potter@amd.com 194311392Sbrandon.potter@amd.com Addr pc = tc->pcState().pc(); 194411392Sbrandon.potter@amd.com 194511392Sbrandon.potter@amd.com if (pc >= text_start && pc < text_end) { 194611856Sbrandon.potter@amd.com std::shared_ptr<FDEntry> fdep = (*p->fds)[tgt_fd]; 194711856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(fdep); 194811856Sbrandon.potter@amd.com ObjectFile *lib = createObjectFile(ffdp->getFileName()); 194911392Sbrandon.potter@amd.com 195011392Sbrandon.potter@amd.com if (lib) { 195111392Sbrandon.potter@amd.com lib->loadAllSymbols(debugSymbolTable, 195211392Sbrandon.potter@amd.com lib->textBase(), start); 195311392Sbrandon.potter@amd.com } 195411392Sbrandon.potter@amd.com } 195511392Sbrandon.potter@amd.com } 195611392Sbrandon.potter@amd.com 195711383Sbrandon.potter@amd.com // Note that we do not zero out the remainder of the mapping. This 195811383Sbrandon.potter@amd.com // is done by a real system, but it probably will not affect 195911383Sbrandon.potter@amd.com // execution (hopefully). 196011383Sbrandon.potter@amd.com } 196111383Sbrandon.potter@amd.com 19621458SN/A return start; 1963360SN/A} 1964360SN/A 196511593Santhony.gutierrez@amd.comtemplate <class OS> 196611593Santhony.gutierrez@amd.comSyscallReturn 196711851Sbrandon.potter@amd.compwrite64Func(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 196811593Santhony.gutierrez@amd.com{ 196911593Santhony.gutierrez@amd.com int index = 0; 197011593Santhony.gutierrez@amd.com int tgt_fd = p->getSyscallArg(tc, index); 197111593Santhony.gutierrez@amd.com Addr bufPtr = p->getSyscallArg(tc, index); 197211593Santhony.gutierrez@amd.com int nbytes = p->getSyscallArg(tc, index); 197311593Santhony.gutierrez@amd.com int offset = p->getSyscallArg(tc, index); 197411593Santhony.gutierrez@amd.com 197511856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 197611856Sbrandon.potter@amd.com if (!ffdp) 197711593Santhony.gutierrez@amd.com return -EBADF; 197811856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 197911593Santhony.gutierrez@amd.com 198011593Santhony.gutierrez@amd.com BufferArg bufArg(bufPtr, nbytes); 198111593Santhony.gutierrez@amd.com bufArg.copyIn(tc->getMemProxy()); 198211593Santhony.gutierrez@amd.com 198311594Santhony.gutierrez@amd.com int bytes_written = pwrite(sim_fd, bufArg.bufferPtr(), nbytes, offset); 198411593Santhony.gutierrez@amd.com 198511593Santhony.gutierrez@amd.com return (bytes_written == -1) ? -errno : bytes_written; 198611593Santhony.gutierrez@amd.com} 198711593Santhony.gutierrez@amd.com 198811385Sbrandon.potter@amd.com/// Target mmap() handler. 198911385Sbrandon.potter@amd.comtemplate <class OS> 199011385Sbrandon.potter@amd.comSyscallReturn 199111851Sbrandon.potter@amd.commmapFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 199211385Sbrandon.potter@amd.com{ 199311385Sbrandon.potter@amd.com return mmapImpl<OS>(desc, num, p, tc, false); 199411385Sbrandon.potter@amd.com} 199511385Sbrandon.potter@amd.com 199611385Sbrandon.potter@amd.com/// Target mmap2() handler. 199711385Sbrandon.potter@amd.comtemplate <class OS> 199811385Sbrandon.potter@amd.comSyscallReturn 199911851Sbrandon.potter@amd.commmap2Func(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 200011385Sbrandon.potter@amd.com{ 200111385Sbrandon.potter@amd.com return mmapImpl<OS>(desc, num, p, tc, true); 200211385Sbrandon.potter@amd.com} 200311385Sbrandon.potter@amd.com 2004378SN/A/// Target getrlimit() handler. 2005360SN/Atemplate <class OS> 20061450SN/ASyscallReturn 200711851Sbrandon.potter@amd.comgetrlimitFunc(SyscallDesc *desc, int callnum, Process *process, 200811851Sbrandon.potter@amd.com ThreadContext *tc) 2009360SN/A{ 20106701Sgblack@eecs.umich.edu int index = 0; 20116701Sgblack@eecs.umich.edu unsigned resource = process->getSyscallArg(tc, index); 20126701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::rlimit> rlp(process->getSyscallArg(tc, index)); 2013360SN/A 2014360SN/A switch (resource) { 201511906SBrandon.Potter@amd.com case OS::TGT_RLIMIT_STACK: 201611906SBrandon.Potter@amd.com // max stack size in bytes: make up a number (8MB for now) 201711906SBrandon.Potter@amd.com rlp->rlim_cur = rlp->rlim_max = 8 * 1024 * 1024; 201811906SBrandon.Potter@amd.com rlp->rlim_cur = TheISA::htog(rlp->rlim_cur); 201911906SBrandon.Potter@amd.com rlp->rlim_max = TheISA::htog(rlp->rlim_max); 202011906SBrandon.Potter@amd.com break; 2021360SN/A 202211906SBrandon.Potter@amd.com case OS::TGT_RLIMIT_DATA: 202311906SBrandon.Potter@amd.com // max data segment size in bytes: make up a number 202411906SBrandon.Potter@amd.com rlp->rlim_cur = rlp->rlim_max = 256 * 1024 * 1024; 202511906SBrandon.Potter@amd.com rlp->rlim_cur = TheISA::htog(rlp->rlim_cur); 202611906SBrandon.Potter@amd.com rlp->rlim_max = TheISA::htog(rlp->rlim_max); 202711906SBrandon.Potter@amd.com break; 20285877Shsul@eecs.umich.edu 202911906SBrandon.Potter@amd.com default: 203011906SBrandon.Potter@amd.com warn("getrlimit: unimplemented resource %d", resource); 203111906SBrandon.Potter@amd.com return -EINVAL; 203211906SBrandon.Potter@amd.com break; 2033360SN/A } 2034360SN/A 20358706Sandreas.hansson@arm.com rlp.copyOut(tc->getMemProxy()); 20361458SN/A return 0; 2037360SN/A} 2038360SN/A 203912235Sar4jc@virginia.edutemplate <class OS> 204012235Sar4jc@virginia.eduSyscallReturn 204112235Sar4jc@virginia.eduprlimitFunc(SyscallDesc *desc, int callnum, Process *process, 204212235Sar4jc@virginia.edu ThreadContext *tc) 204312235Sar4jc@virginia.edu{ 204412235Sar4jc@virginia.edu int index = 0; 204512235Sar4jc@virginia.edu if (process->getSyscallArg(tc, index) != 0) 204612235Sar4jc@virginia.edu { 204712235Sar4jc@virginia.edu warn("prlimit: ignoring rlimits for nonzero pid"); 204812235Sar4jc@virginia.edu return -EPERM; 204912235Sar4jc@virginia.edu } 205012235Sar4jc@virginia.edu int resource = process->getSyscallArg(tc, index); 205112235Sar4jc@virginia.edu Addr n = process->getSyscallArg(tc, index); 205212235Sar4jc@virginia.edu if (n != 0) 205312235Sar4jc@virginia.edu warn("prlimit: ignoring new rlimit"); 205412235Sar4jc@virginia.edu Addr o = process->getSyscallArg(tc, index); 205512235Sar4jc@virginia.edu if (o != 0) 205612235Sar4jc@virginia.edu { 205712416Sqtt2@cornell.edu TypedBufferArg<typename OS::rlimit> rlp(o); 205812235Sar4jc@virginia.edu switch (resource) { 205912235Sar4jc@virginia.edu case OS::TGT_RLIMIT_STACK: 206012235Sar4jc@virginia.edu // max stack size in bytes: make up a number (8MB for now) 206112235Sar4jc@virginia.edu rlp->rlim_cur = rlp->rlim_max = 8 * 1024 * 1024; 206212235Sar4jc@virginia.edu rlp->rlim_cur = TheISA::htog(rlp->rlim_cur); 206312235Sar4jc@virginia.edu rlp->rlim_max = TheISA::htog(rlp->rlim_max); 206412235Sar4jc@virginia.edu break; 206512235Sar4jc@virginia.edu case OS::TGT_RLIMIT_DATA: 206612235Sar4jc@virginia.edu // max data segment size in bytes: make up a number 206712235Sar4jc@virginia.edu rlp->rlim_cur = rlp->rlim_max = 256*1024*1024; 206812235Sar4jc@virginia.edu rlp->rlim_cur = TheISA::htog(rlp->rlim_cur); 206912235Sar4jc@virginia.edu rlp->rlim_max = TheISA::htog(rlp->rlim_max); 207012593Sjason@lowepower.com break; 207112235Sar4jc@virginia.edu default: 207212235Sar4jc@virginia.edu warn("prlimit: unimplemented resource %d", resource); 207312235Sar4jc@virginia.edu return -EINVAL; 207412235Sar4jc@virginia.edu break; 207512235Sar4jc@virginia.edu } 207612235Sar4jc@virginia.edu rlp.copyOut(tc->getMemProxy()); 207712235Sar4jc@virginia.edu } 207812235Sar4jc@virginia.edu return 0; 207912235Sar4jc@virginia.edu} 208012235Sar4jc@virginia.edu 208110796Sbrandon.potter@amd.com/// Target clock_gettime() function. 208210796Sbrandon.potter@amd.comtemplate <class OS> 208310796Sbrandon.potter@amd.comSyscallReturn 208411851Sbrandon.potter@amd.comclock_gettimeFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 208510796Sbrandon.potter@amd.com{ 208610796Sbrandon.potter@amd.com int index = 1; 208710796Sbrandon.potter@amd.com //int clk_id = p->getSyscallArg(tc, index); 208810796Sbrandon.potter@amd.com TypedBufferArg<typename OS::timespec> tp(p->getSyscallArg(tc, index)); 208910796Sbrandon.potter@amd.com 209010796Sbrandon.potter@amd.com getElapsedTimeNano(tp->tv_sec, tp->tv_nsec); 209110796Sbrandon.potter@amd.com tp->tv_sec += seconds_since_epoch; 209210796Sbrandon.potter@amd.com tp->tv_sec = TheISA::htog(tp->tv_sec); 209310796Sbrandon.potter@amd.com tp->tv_nsec = TheISA::htog(tp->tv_nsec); 209410796Sbrandon.potter@amd.com 209510796Sbrandon.potter@amd.com tp.copyOut(tc->getMemProxy()); 209610796Sbrandon.potter@amd.com 209710796Sbrandon.potter@amd.com return 0; 209810796Sbrandon.potter@amd.com} 209910796Sbrandon.potter@amd.com 210011337SMichael.Lebeane@amd.com/// Target clock_getres() function. 210111337SMichael.Lebeane@amd.comtemplate <class OS> 210211337SMichael.Lebeane@amd.comSyscallReturn 210311851Sbrandon.potter@amd.comclock_getresFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 210411337SMichael.Lebeane@amd.com{ 210511337SMichael.Lebeane@amd.com int index = 1; 210611337SMichael.Lebeane@amd.com TypedBufferArg<typename OS::timespec> tp(p->getSyscallArg(tc, index)); 210711337SMichael.Lebeane@amd.com 210811337SMichael.Lebeane@amd.com // Set resolution at ns, which is what clock_gettime() returns 210911337SMichael.Lebeane@amd.com tp->tv_sec = 0; 211011337SMichael.Lebeane@amd.com tp->tv_nsec = 1; 211111337SMichael.Lebeane@amd.com 211211337SMichael.Lebeane@amd.com tp.copyOut(tc->getMemProxy()); 211311337SMichael.Lebeane@amd.com 211411337SMichael.Lebeane@amd.com return 0; 211511337SMichael.Lebeane@amd.com} 211611337SMichael.Lebeane@amd.com 2117378SN/A/// Target gettimeofday() handler. 2118360SN/Atemplate <class OS> 21191450SN/ASyscallReturn 212011851Sbrandon.potter@amd.comgettimeofdayFunc(SyscallDesc *desc, int callnum, Process *process, 212111851Sbrandon.potter@amd.com ThreadContext *tc) 2122360SN/A{ 21236701Sgblack@eecs.umich.edu int index = 0; 21246701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::timeval> tp(process->getSyscallArg(tc, index)); 2125360SN/A 212610796Sbrandon.potter@amd.com getElapsedTimeMicro(tp->tv_sec, tp->tv_usec); 2127360SN/A tp->tv_sec += seconds_since_epoch; 21286109Ssanchezd@stanford.edu tp->tv_sec = TheISA::htog(tp->tv_sec); 21296109Ssanchezd@stanford.edu tp->tv_usec = TheISA::htog(tp->tv_usec); 2130360SN/A 21318706Sandreas.hansson@arm.com tp.copyOut(tc->getMemProxy()); 2132360SN/A 21331458SN/A return 0; 2134360SN/A} 2135360SN/A 2136360SN/A 21371999SN/A/// Target utimes() handler. 21381999SN/Atemplate <class OS> 21391999SN/ASyscallReturn 214011851Sbrandon.potter@amd.comutimesFunc(SyscallDesc *desc, int callnum, Process *process, 21412680Sktlim@umich.edu ThreadContext *tc) 21421999SN/A{ 21431999SN/A std::string path; 21441999SN/A 21456701Sgblack@eecs.umich.edu int index = 0; 21468852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 21476701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 21486701Sgblack@eecs.umich.edu return -EFAULT; 21496701Sgblack@eecs.umich.edu } 21501999SN/A 21516701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::timeval [2]> 21526701Sgblack@eecs.umich.edu tp(process->getSyscallArg(tc, index)); 21538706Sandreas.hansson@arm.com tp.copyIn(tc->getMemProxy()); 21541999SN/A 21551999SN/A struct timeval hostTimeval[2]; 215611906SBrandon.Potter@amd.com for (int i = 0; i < 2; ++i) { 21578737Skoansin.tan@gmail.com hostTimeval[i].tv_sec = TheISA::gtoh((*tp)[i].tv_sec); 21588737Skoansin.tan@gmail.com hostTimeval[i].tv_usec = TheISA::gtoh((*tp)[i].tv_usec); 21591999SN/A } 21603669Sbinkertn@umich.edu 216113883Sdavid.hashe@amd.com // Adjust path for cwd and redirection 216213883Sdavid.hashe@amd.com path = process->checkPathRedirect(path); 21633669Sbinkertn@umich.edu 21641999SN/A int result = utimes(path.c_str(), hostTimeval); 21651999SN/A 21661999SN/A if (result < 0) 21671999SN/A return -errno; 21681999SN/A 21691999SN/A return 0; 21701999SN/A} 217111886Sbrandon.potter@amd.com 217211886Sbrandon.potter@amd.comtemplate <class OS> 217311886Sbrandon.potter@amd.comSyscallReturn 217411886Sbrandon.potter@amd.comexecveFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 217511886Sbrandon.potter@amd.com{ 217611886Sbrandon.potter@amd.com desc->setFlags(0); 217711886Sbrandon.potter@amd.com 217811886Sbrandon.potter@amd.com int index = 0; 217911886Sbrandon.potter@amd.com std::string path; 218011886Sbrandon.potter@amd.com SETranslatingPortProxy & mem_proxy = tc->getMemProxy(); 218111886Sbrandon.potter@amd.com if (!mem_proxy.tryReadString(path, p->getSyscallArg(tc, index))) 218211886Sbrandon.potter@amd.com return -EFAULT; 218311886Sbrandon.potter@amd.com 218411886Sbrandon.potter@amd.com if (access(path.c_str(), F_OK) == -1) 218511886Sbrandon.potter@amd.com return -EACCES; 218611886Sbrandon.potter@amd.com 218711886Sbrandon.potter@amd.com auto read_in = [](std::vector<std::string> & vect, 218811886Sbrandon.potter@amd.com SETranslatingPortProxy & mem_proxy, 218911886Sbrandon.potter@amd.com Addr mem_loc) 219011886Sbrandon.potter@amd.com { 219111886Sbrandon.potter@amd.com for (int inc = 0; ; inc++) { 219211886Sbrandon.potter@amd.com BufferArg b((mem_loc + sizeof(Addr) * inc), sizeof(Addr)); 219311886Sbrandon.potter@amd.com b.copyIn(mem_proxy); 219411886Sbrandon.potter@amd.com 219511886Sbrandon.potter@amd.com if (!*(Addr*)b.bufferPtr()) 219611886Sbrandon.potter@amd.com break; 219711886Sbrandon.potter@amd.com 219811886Sbrandon.potter@amd.com vect.push_back(std::string()); 219911886Sbrandon.potter@amd.com mem_proxy.tryReadString(vect[inc], *(Addr*)b.bufferPtr()); 220011886Sbrandon.potter@amd.com } 220111886Sbrandon.potter@amd.com }; 220211886Sbrandon.potter@amd.com 220311886Sbrandon.potter@amd.com /** 220411886Sbrandon.potter@amd.com * Note that ProcessParams is generated by swig and there are no other 220511886Sbrandon.potter@amd.com * examples of how to create anything but this default constructor. The 220611886Sbrandon.potter@amd.com * fields are manually initialized instead of passing parameters to the 220711886Sbrandon.potter@amd.com * constructor. 220811886Sbrandon.potter@amd.com */ 220911886Sbrandon.potter@amd.com ProcessParams *pp = new ProcessParams(); 221011886Sbrandon.potter@amd.com pp->executable = path; 221111886Sbrandon.potter@amd.com Addr argv_mem_loc = p->getSyscallArg(tc, index); 221211886Sbrandon.potter@amd.com read_in(pp->cmd, mem_proxy, argv_mem_loc); 221311886Sbrandon.potter@amd.com Addr envp_mem_loc = p->getSyscallArg(tc, index); 221411886Sbrandon.potter@amd.com read_in(pp->env, mem_proxy, envp_mem_loc); 221511886Sbrandon.potter@amd.com pp->uid = p->uid(); 221611886Sbrandon.potter@amd.com pp->egid = p->egid(); 221711886Sbrandon.potter@amd.com pp->euid = p->euid(); 221811886Sbrandon.potter@amd.com pp->gid = p->gid(); 221911886Sbrandon.potter@amd.com pp->ppid = p->ppid(); 222011886Sbrandon.potter@amd.com pp->pid = p->pid(); 222111886Sbrandon.potter@amd.com pp->input.assign("cin"); 222211886Sbrandon.potter@amd.com pp->output.assign("cout"); 222311886Sbrandon.potter@amd.com pp->errout.assign("cerr"); 222413883Sdavid.hashe@amd.com pp->cwd.assign(p->tgtCwd); 222511886Sbrandon.potter@amd.com pp->system = p->system; 222611886Sbrandon.potter@amd.com /** 222711886Sbrandon.potter@amd.com * Prevent process object creation with identical PIDs (which will trip 222811886Sbrandon.potter@amd.com * a fatal check in Process constructor). The execve call is supposed to 222911886Sbrandon.potter@amd.com * take over the currently executing process' identity but replace 223011886Sbrandon.potter@amd.com * whatever it is doing with a new process image. Instead of hijacking 223111886Sbrandon.potter@amd.com * the process object in the simulator, we create a new process object 223211886Sbrandon.potter@amd.com * and bind to the previous process' thread below (hijacking the thread). 223311886Sbrandon.potter@amd.com */ 223411886Sbrandon.potter@amd.com p->system->PIDs.erase(p->pid()); 223511886Sbrandon.potter@amd.com Process *new_p = pp->create(); 223611886Sbrandon.potter@amd.com delete pp; 223711886Sbrandon.potter@amd.com 223811886Sbrandon.potter@amd.com /** 223911886Sbrandon.potter@amd.com * Work through the file descriptor array and close any files marked 224011886Sbrandon.potter@amd.com * close-on-exec. 224111886Sbrandon.potter@amd.com */ 224211886Sbrandon.potter@amd.com new_p->fds = p->fds; 224311886Sbrandon.potter@amd.com for (int i = 0; i < new_p->fds->getSize(); i++) { 224411886Sbrandon.potter@amd.com std::shared_ptr<FDEntry> fdep = (*new_p->fds)[i]; 224511886Sbrandon.potter@amd.com if (fdep && fdep->getCOE()) 224611886Sbrandon.potter@amd.com new_p->fds->closeFDEntry(i); 224711886Sbrandon.potter@amd.com } 224811886Sbrandon.potter@amd.com 224911886Sbrandon.potter@amd.com *new_p->sigchld = true; 225011886Sbrandon.potter@amd.com 225111886Sbrandon.potter@amd.com delete p; 225211886Sbrandon.potter@amd.com tc->clearArchRegs(); 225311886Sbrandon.potter@amd.com tc->setProcessPtr(new_p); 225411886Sbrandon.potter@amd.com new_p->assignThreadContext(tc->contextId()); 225511886Sbrandon.potter@amd.com new_p->initState(); 225611886Sbrandon.potter@amd.com tc->activate(); 225711886Sbrandon.potter@amd.com TheISA::PCState pcState = tc->pcState(); 225811886Sbrandon.potter@amd.com tc->setNPC(pcState.instAddr()); 225911886Sbrandon.potter@amd.com 226011886Sbrandon.potter@amd.com desc->setFlags(SyscallDesc::SuppressReturnValue); 226111886Sbrandon.potter@amd.com return 0; 226211886Sbrandon.potter@amd.com} 226311886Sbrandon.potter@amd.com 2264378SN/A/// Target getrusage() function. 2265360SN/Atemplate <class OS> 22661450SN/ASyscallReturn 226711851Sbrandon.potter@amd.comgetrusageFunc(SyscallDesc *desc, int callnum, Process *process, 22682680Sktlim@umich.edu ThreadContext *tc) 2269360SN/A{ 22706701Sgblack@eecs.umich.edu int index = 0; 22716701Sgblack@eecs.umich.edu int who = process->getSyscallArg(tc, index); // THREAD, SELF, or CHILDREN 22726701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::rusage> rup(process->getSyscallArg(tc, index)); 2273360SN/A 22743670Sbinkertn@umich.edu rup->ru_utime.tv_sec = 0; 22753670Sbinkertn@umich.edu rup->ru_utime.tv_usec = 0; 2276360SN/A rup->ru_stime.tv_sec = 0; 2277360SN/A rup->ru_stime.tv_usec = 0; 2278360SN/A rup->ru_maxrss = 0; 2279360SN/A rup->ru_ixrss = 0; 2280360SN/A rup->ru_idrss = 0; 2281360SN/A rup->ru_isrss = 0; 2282360SN/A rup->ru_minflt = 0; 2283360SN/A rup->ru_majflt = 0; 2284360SN/A rup->ru_nswap = 0; 2285360SN/A rup->ru_inblock = 0; 2286360SN/A rup->ru_oublock = 0; 2287360SN/A rup->ru_msgsnd = 0; 2288360SN/A rup->ru_msgrcv = 0; 2289360SN/A rup->ru_nsignals = 0; 2290360SN/A rup->ru_nvcsw = 0; 2291360SN/A rup->ru_nivcsw = 0; 2292360SN/A 22933670Sbinkertn@umich.edu switch (who) { 22943670Sbinkertn@umich.edu case OS::TGT_RUSAGE_SELF: 229510796Sbrandon.potter@amd.com getElapsedTimeMicro(rup->ru_utime.tv_sec, rup->ru_utime.tv_usec); 22968737Skoansin.tan@gmail.com rup->ru_utime.tv_sec = TheISA::htog(rup->ru_utime.tv_sec); 22978737Skoansin.tan@gmail.com rup->ru_utime.tv_usec = TheISA::htog(rup->ru_utime.tv_usec); 22983670Sbinkertn@umich.edu break; 22993670Sbinkertn@umich.edu 23003670Sbinkertn@umich.edu case OS::TGT_RUSAGE_CHILDREN: 23013670Sbinkertn@umich.edu // do nothing. We have no child processes, so they take no time. 23023670Sbinkertn@umich.edu break; 23033670Sbinkertn@umich.edu 23043670Sbinkertn@umich.edu default: 23053670Sbinkertn@umich.edu // don't really handle THREAD or CHILDREN, but just warn and 23063670Sbinkertn@umich.edu // plow ahead 23073670Sbinkertn@umich.edu warn("getrusage() only supports RUSAGE_SELF. Parameter %d ignored.", 23083670Sbinkertn@umich.edu who); 23093670Sbinkertn@umich.edu } 23103670Sbinkertn@umich.edu 23118706Sandreas.hansson@arm.com rup.copyOut(tc->getMemProxy()); 2312360SN/A 23131458SN/A return 0; 2314360SN/A} 2315360SN/A 23166683Stjones1@inf.ed.ac.uk/// Target times() function. 23176683Stjones1@inf.ed.ac.uktemplate <class OS> 23186683Stjones1@inf.ed.ac.ukSyscallReturn 231911851Sbrandon.potter@amd.comtimesFunc(SyscallDesc *desc, int callnum, Process *process, 232011851Sbrandon.potter@amd.com ThreadContext *tc) 23216683Stjones1@inf.ed.ac.uk{ 23226701Sgblack@eecs.umich.edu int index = 0; 23236701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::tms> bufp(process->getSyscallArg(tc, index)); 23246683Stjones1@inf.ed.ac.uk 23256683Stjones1@inf.ed.ac.uk // Fill in the time structure (in clocks) 23267823Ssteve.reinhardt@amd.com int64_t clocks = curTick() * OS::M5_SC_CLK_TCK / SimClock::Int::s; 23276683Stjones1@inf.ed.ac.uk bufp->tms_utime = clocks; 23286683Stjones1@inf.ed.ac.uk bufp->tms_stime = 0; 23296683Stjones1@inf.ed.ac.uk bufp->tms_cutime = 0; 23306683Stjones1@inf.ed.ac.uk bufp->tms_cstime = 0; 23316683Stjones1@inf.ed.ac.uk 23326683Stjones1@inf.ed.ac.uk // Convert to host endianness 23338737Skoansin.tan@gmail.com bufp->tms_utime = TheISA::htog(bufp->tms_utime); 23346683Stjones1@inf.ed.ac.uk 23356683Stjones1@inf.ed.ac.uk // Write back 23368706Sandreas.hansson@arm.com bufp.copyOut(tc->getMemProxy()); 23376683Stjones1@inf.ed.ac.uk 23386683Stjones1@inf.ed.ac.uk // Return clock ticks since system boot 23396683Stjones1@inf.ed.ac.uk return clocks; 23406683Stjones1@inf.ed.ac.uk} 23412553SN/A 23426684Stjones1@inf.ed.ac.uk/// Target time() function. 23436684Stjones1@inf.ed.ac.uktemplate <class OS> 23446684Stjones1@inf.ed.ac.ukSyscallReturn 234511851Sbrandon.potter@amd.comtimeFunc(SyscallDesc *desc, int callnum, Process *process, ThreadContext *tc) 23466684Stjones1@inf.ed.ac.uk{ 23476684Stjones1@inf.ed.ac.uk typename OS::time_t sec, usec; 234810796Sbrandon.potter@amd.com getElapsedTimeMicro(sec, usec); 23496684Stjones1@inf.ed.ac.uk sec += seconds_since_epoch; 23506684Stjones1@inf.ed.ac.uk 23516701Sgblack@eecs.umich.edu int index = 0; 23526701Sgblack@eecs.umich.edu Addr taddr = (Addr)process->getSyscallArg(tc, index); 235311321Ssteve.reinhardt@amd.com if (taddr != 0) { 23546684Stjones1@inf.ed.ac.uk typename OS::time_t t = sec; 23558737Skoansin.tan@gmail.com t = TheISA::htog(t); 23568852Sandreas.hansson@arm.com SETranslatingPortProxy &p = tc->getMemProxy(); 23578852Sandreas.hansson@arm.com p.writeBlob(taddr, (uint8_t*)&t, (int)sizeof(typename OS::time_t)); 23586684Stjones1@inf.ed.ac.uk } 23596684Stjones1@inf.ed.ac.uk return sec; 23606684Stjones1@inf.ed.ac.uk} 23612553SN/A 236211910SBrandon.Potter@amd.comtemplate <class OS> 236311910SBrandon.Potter@amd.comSyscallReturn 236411910SBrandon.Potter@amd.comtgkillFunc(SyscallDesc *desc, int num, Process *process, ThreadContext *tc) 236511910SBrandon.Potter@amd.com{ 236611910SBrandon.Potter@amd.com int index = 0; 236711910SBrandon.Potter@amd.com int tgid = process->getSyscallArg(tc, index); 236811910SBrandon.Potter@amd.com int tid = process->getSyscallArg(tc, index); 236911910SBrandon.Potter@amd.com int sig = process->getSyscallArg(tc, index); 237011910SBrandon.Potter@amd.com 237111910SBrandon.Potter@amd.com /** 237211910SBrandon.Potter@amd.com * This system call is intended to allow killing a specific thread 237311910SBrandon.Potter@amd.com * within an arbitrary thread group if sanctioned with permission checks. 237411910SBrandon.Potter@amd.com * It's usually true that threads share the termination signal as pointed 237511910SBrandon.Potter@amd.com * out by the pthread_kill man page and this seems to be the intended 237611910SBrandon.Potter@amd.com * usage. Due to this being an emulated environment, assume the following: 237711910SBrandon.Potter@amd.com * Threads are allowed to call tgkill because the EUID for all threads 237811910SBrandon.Potter@amd.com * should be the same. There is no signal handling mechanism for kernel 237911910SBrandon.Potter@amd.com * registration of signal handlers since signals are poorly supported in 238011910SBrandon.Potter@amd.com * emulation mode. Since signal handlers cannot be registered, all 238111910SBrandon.Potter@amd.com * threads within in a thread group must share the termination signal. 238211910SBrandon.Potter@amd.com * We never exhaust PIDs so there's no chance of finding the wrong one 238311910SBrandon.Potter@amd.com * due to PID rollover. 238411910SBrandon.Potter@amd.com */ 238511910SBrandon.Potter@amd.com 238611910SBrandon.Potter@amd.com System *sys = tc->getSystemPtr(); 238711910SBrandon.Potter@amd.com Process *tgt_proc = nullptr; 238811910SBrandon.Potter@amd.com for (int i = 0; i < sys->numContexts(); i++) { 238911910SBrandon.Potter@amd.com Process *temp = sys->threadContexts[i]->getProcessPtr(); 239011910SBrandon.Potter@amd.com if (temp->pid() == tid) { 239111910SBrandon.Potter@amd.com tgt_proc = temp; 239211910SBrandon.Potter@amd.com break; 239311910SBrandon.Potter@amd.com } 239411910SBrandon.Potter@amd.com } 239511910SBrandon.Potter@amd.com 239611910SBrandon.Potter@amd.com if (sig != 0 || sig != OS::TGT_SIGABRT) 239711910SBrandon.Potter@amd.com return -EINVAL; 239811910SBrandon.Potter@amd.com 239911910SBrandon.Potter@amd.com if (tgt_proc == nullptr) 240011910SBrandon.Potter@amd.com return -ESRCH; 240111910SBrandon.Potter@amd.com 240211910SBrandon.Potter@amd.com if (tgid != -1 && tgt_proc->tgid() != tgid) 240311910SBrandon.Potter@amd.com return -ESRCH; 240411910SBrandon.Potter@amd.com 240511910SBrandon.Potter@amd.com if (sig == OS::TGT_SIGABRT) 240611910SBrandon.Potter@amd.com exitGroupFunc(desc, 252, process, tc); 240711910SBrandon.Potter@amd.com 240811910SBrandon.Potter@amd.com return 0; 240911910SBrandon.Potter@amd.com} 241011910SBrandon.Potter@amd.com 241113568Sbrandon.potter@amd.comtemplate <class OS> 241213568Sbrandon.potter@amd.comSyscallReturn 241313568Sbrandon.potter@amd.comsocketFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 241413568Sbrandon.potter@amd.com{ 241513568Sbrandon.potter@amd.com int index = 0; 241613568Sbrandon.potter@amd.com int domain = p->getSyscallArg(tc, index); 241713568Sbrandon.potter@amd.com int type = p->getSyscallArg(tc, index); 241813568Sbrandon.potter@amd.com int prot = p->getSyscallArg(tc, index); 241913568Sbrandon.potter@amd.com 242013568Sbrandon.potter@amd.com int sim_fd = socket(domain, type, prot); 242113568Sbrandon.potter@amd.com if (sim_fd == -1) 242213568Sbrandon.potter@amd.com return -errno; 242313568Sbrandon.potter@amd.com 242413568Sbrandon.potter@amd.com auto sfdp = std::make_shared<SocketFDEntry>(sim_fd, domain, type, prot); 242513568Sbrandon.potter@amd.com int tgt_fd = p->fds->allocFD(sfdp); 242613568Sbrandon.potter@amd.com 242713568Sbrandon.potter@amd.com return tgt_fd; 242813568Sbrandon.potter@amd.com} 242913568Sbrandon.potter@amd.com 243013568Sbrandon.potter@amd.comtemplate <class OS> 243113568Sbrandon.potter@amd.comSyscallReturn 243213568Sbrandon.potter@amd.comsocketpairFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 243313568Sbrandon.potter@amd.com{ 243413568Sbrandon.potter@amd.com int index = 0; 243513568Sbrandon.potter@amd.com int domain = p->getSyscallArg(tc, index); 243613568Sbrandon.potter@amd.com int type = p->getSyscallArg(tc, index); 243713568Sbrandon.potter@amd.com int prot = p->getSyscallArg(tc, index); 243813568Sbrandon.potter@amd.com Addr svPtr = p->getSyscallArg(tc, index); 243913568Sbrandon.potter@amd.com 244013568Sbrandon.potter@amd.com BufferArg svBuf((Addr)svPtr, 2 * sizeof(int)); 244113568Sbrandon.potter@amd.com int status = socketpair(domain, type, prot, (int *)svBuf.bufferPtr()); 244213568Sbrandon.potter@amd.com if (status == -1) 244313568Sbrandon.potter@amd.com return -errno; 244413568Sbrandon.potter@amd.com 244513568Sbrandon.potter@amd.com int *fds = (int *)svBuf.bufferPtr(); 244613568Sbrandon.potter@amd.com 244713568Sbrandon.potter@amd.com auto sfdp1 = std::make_shared<SocketFDEntry>(fds[0], domain, type, prot); 244813568Sbrandon.potter@amd.com fds[0] = p->fds->allocFD(sfdp1); 244913568Sbrandon.potter@amd.com auto sfdp2 = std::make_shared<SocketFDEntry>(fds[1], domain, type, prot); 245013568Sbrandon.potter@amd.com fds[1] = p->fds->allocFD(sfdp2); 245113568Sbrandon.potter@amd.com svBuf.copyOut(tc->getMemProxy()); 245213568Sbrandon.potter@amd.com 245313568Sbrandon.potter@amd.com return status; 245413568Sbrandon.potter@amd.com} 24552553SN/A 245613570Sbrandon.potter@amd.comtemplate <class OS> 245713570Sbrandon.potter@amd.comSyscallReturn 245813570Sbrandon.potter@amd.comselectFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 245913570Sbrandon.potter@amd.com{ 246013570Sbrandon.potter@amd.com int retval; 246113570Sbrandon.potter@amd.com 246213570Sbrandon.potter@amd.com int index = 0; 246313570Sbrandon.potter@amd.com int nfds_t = p->getSyscallArg(tc, index); 246413570Sbrandon.potter@amd.com Addr fds_read_ptr = p->getSyscallArg(tc, index); 246513570Sbrandon.potter@amd.com Addr fds_writ_ptr = p->getSyscallArg(tc, index); 246613570Sbrandon.potter@amd.com Addr fds_excp_ptr = p->getSyscallArg(tc, index); 246713570Sbrandon.potter@amd.com Addr time_val_ptr = p->getSyscallArg(tc, index); 246813570Sbrandon.potter@amd.com 246913570Sbrandon.potter@amd.com TypedBufferArg<typename OS::fd_set> rd_t(fds_read_ptr); 247013570Sbrandon.potter@amd.com TypedBufferArg<typename OS::fd_set> wr_t(fds_writ_ptr); 247113570Sbrandon.potter@amd.com TypedBufferArg<typename OS::fd_set> ex_t(fds_excp_ptr); 247213570Sbrandon.potter@amd.com TypedBufferArg<typename OS::timeval> tp(time_val_ptr); 247313570Sbrandon.potter@amd.com 247413570Sbrandon.potter@amd.com /** 247513570Sbrandon.potter@amd.com * Host fields. Notice that these use the definitions from the system 247613570Sbrandon.potter@amd.com * headers instead of the gem5 headers and libraries. If the host and 247713570Sbrandon.potter@amd.com * target have different header file definitions, this will not work. 247813570Sbrandon.potter@amd.com */ 247913570Sbrandon.potter@amd.com fd_set rd_h; 248013570Sbrandon.potter@amd.com FD_ZERO(&rd_h); 248113570Sbrandon.potter@amd.com fd_set wr_h; 248213570Sbrandon.potter@amd.com FD_ZERO(&wr_h); 248313570Sbrandon.potter@amd.com fd_set ex_h; 248413570Sbrandon.potter@amd.com FD_ZERO(&ex_h); 248513570Sbrandon.potter@amd.com 248613570Sbrandon.potter@amd.com /** 248713570Sbrandon.potter@amd.com * Copy in the fd_set from the target. 248813570Sbrandon.potter@amd.com */ 248913570Sbrandon.potter@amd.com if (fds_read_ptr) 249013570Sbrandon.potter@amd.com rd_t.copyIn(tc->getMemProxy()); 249113570Sbrandon.potter@amd.com if (fds_writ_ptr) 249213570Sbrandon.potter@amd.com wr_t.copyIn(tc->getMemProxy()); 249313570Sbrandon.potter@amd.com if (fds_excp_ptr) 249413570Sbrandon.potter@amd.com ex_t.copyIn(tc->getMemProxy()); 249513570Sbrandon.potter@amd.com 249613570Sbrandon.potter@amd.com /** 249713570Sbrandon.potter@amd.com * We need to translate the target file descriptor set into a host file 249813570Sbrandon.potter@amd.com * descriptor set. This involves both our internal process fd array 249913570Sbrandon.potter@amd.com * and the fd_set defined in Linux header files. The nfds field also 250013570Sbrandon.potter@amd.com * needs to be updated as it will be only target specific after 250113570Sbrandon.potter@amd.com * retrieving it from the target; the nfds value is expected to be the 250213570Sbrandon.potter@amd.com * highest file descriptor that needs to be checked, so we need to extend 250313570Sbrandon.potter@amd.com * it out for nfds_h when we do the update. 250413570Sbrandon.potter@amd.com */ 250513570Sbrandon.potter@amd.com int nfds_h = 0; 250613570Sbrandon.potter@amd.com std::map<int, int> trans_map; 250713570Sbrandon.potter@amd.com auto try_add_host_set = [&](fd_set *tgt_set_entry, 250813570Sbrandon.potter@amd.com fd_set *hst_set_entry, 250913570Sbrandon.potter@amd.com int iter) -> bool 251013570Sbrandon.potter@amd.com { 251113570Sbrandon.potter@amd.com /** 251213570Sbrandon.potter@amd.com * By this point, we know that we are looking at a valid file 251313570Sbrandon.potter@amd.com * descriptor set on the target. We need to check if the target file 251413570Sbrandon.potter@amd.com * descriptor value passed in as iter is part of the set. 251513570Sbrandon.potter@amd.com */ 251613570Sbrandon.potter@amd.com if (FD_ISSET(iter, tgt_set_entry)) { 251713570Sbrandon.potter@amd.com /** 251813570Sbrandon.potter@amd.com * We know that the target file descriptor belongs to the set, 251913570Sbrandon.potter@amd.com * but we do not yet know if the file descriptor is valid or 252013570Sbrandon.potter@amd.com * that we have a host mapping. Check that now. 252113570Sbrandon.potter@amd.com */ 252213570Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[iter]); 252313570Sbrandon.potter@amd.com if (!hbfdp) 252413570Sbrandon.potter@amd.com return true; 252513570Sbrandon.potter@amd.com auto sim_fd = hbfdp->getSimFD(); 252613570Sbrandon.potter@amd.com 252713570Sbrandon.potter@amd.com /** 252813570Sbrandon.potter@amd.com * Add the sim_fd to tgt_fd translation into trans_map for use 252913570Sbrandon.potter@amd.com * later when we need to zero the target fd_set structures and 253013570Sbrandon.potter@amd.com * then update them with hits returned from the host select call. 253113570Sbrandon.potter@amd.com */ 253213570Sbrandon.potter@amd.com trans_map[sim_fd] = iter; 253313570Sbrandon.potter@amd.com 253413570Sbrandon.potter@amd.com /** 253513570Sbrandon.potter@amd.com * We know that the host file descriptor exists so now we check 253613570Sbrandon.potter@amd.com * if we need to update the max count for nfds_h before passing 253713570Sbrandon.potter@amd.com * the duplicated structure into the host. 253813570Sbrandon.potter@amd.com */ 253913570Sbrandon.potter@amd.com nfds_h = std::max(nfds_h - 1, sim_fd + 1); 254013570Sbrandon.potter@amd.com 254113570Sbrandon.potter@amd.com /** 254213570Sbrandon.potter@amd.com * Add the host file descriptor to the set that we are going to 254313570Sbrandon.potter@amd.com * pass into the host. 254413570Sbrandon.potter@amd.com */ 254513570Sbrandon.potter@amd.com FD_SET(sim_fd, hst_set_entry); 254613570Sbrandon.potter@amd.com } 254713570Sbrandon.potter@amd.com return false; 254813570Sbrandon.potter@amd.com }; 254913570Sbrandon.potter@amd.com 255013570Sbrandon.potter@amd.com for (int i = 0; i < nfds_t; i++) { 255113570Sbrandon.potter@amd.com if (fds_read_ptr) { 255213570Sbrandon.potter@amd.com bool ebadf = try_add_host_set((fd_set*)&*rd_t, &rd_h, i); 255313570Sbrandon.potter@amd.com if (ebadf) return -EBADF; 255413570Sbrandon.potter@amd.com } 255513570Sbrandon.potter@amd.com if (fds_writ_ptr) { 255613570Sbrandon.potter@amd.com bool ebadf = try_add_host_set((fd_set*)&*wr_t, &wr_h, i); 255713570Sbrandon.potter@amd.com if (ebadf) return -EBADF; 255813570Sbrandon.potter@amd.com } 255913570Sbrandon.potter@amd.com if (fds_excp_ptr) { 256013570Sbrandon.potter@amd.com bool ebadf = try_add_host_set((fd_set*)&*ex_t, &ex_h, i); 256113570Sbrandon.potter@amd.com if (ebadf) return -EBADF; 256213570Sbrandon.potter@amd.com } 256313570Sbrandon.potter@amd.com } 256413570Sbrandon.potter@amd.com 256513570Sbrandon.potter@amd.com if (time_val_ptr) { 256613570Sbrandon.potter@amd.com /** 256713570Sbrandon.potter@amd.com * It might be possible to decrement the timeval based on some 256813570Sbrandon.potter@amd.com * derivation of wall clock determined from elapsed simulator ticks 256913570Sbrandon.potter@amd.com * but that seems like overkill. Rather, we just set the timeval with 257013570Sbrandon.potter@amd.com * zero timeout. (There is no reason to block during the simulation 257113570Sbrandon.potter@amd.com * as it only decreases simulator performance.) 257213570Sbrandon.potter@amd.com */ 257313570Sbrandon.potter@amd.com tp->tv_sec = 0; 257413570Sbrandon.potter@amd.com tp->tv_usec = 0; 257513570Sbrandon.potter@amd.com 257613570Sbrandon.potter@amd.com retval = select(nfds_h, 257713570Sbrandon.potter@amd.com fds_read_ptr ? &rd_h : nullptr, 257813570Sbrandon.potter@amd.com fds_writ_ptr ? &wr_h : nullptr, 257913570Sbrandon.potter@amd.com fds_excp_ptr ? &ex_h : nullptr, 258013570Sbrandon.potter@amd.com (timeval*)&*tp); 258113570Sbrandon.potter@amd.com } else { 258213570Sbrandon.potter@amd.com /** 258313570Sbrandon.potter@amd.com * If the timeval pointer is null, setup a new timeval structure to 258413570Sbrandon.potter@amd.com * pass into the host select call. Unfortunately, we will need to 258513570Sbrandon.potter@amd.com * manually check the return value and throw a retry fault if the 258613570Sbrandon.potter@amd.com * return value is zero. Allowing the system call to block will 258713570Sbrandon.potter@amd.com * likely deadlock the event queue. 258813570Sbrandon.potter@amd.com */ 258913570Sbrandon.potter@amd.com struct timeval tv = { 0, 0 }; 259013570Sbrandon.potter@amd.com 259113570Sbrandon.potter@amd.com retval = select(nfds_h, 259213570Sbrandon.potter@amd.com fds_read_ptr ? &rd_h : nullptr, 259313570Sbrandon.potter@amd.com fds_writ_ptr ? &wr_h : nullptr, 259413570Sbrandon.potter@amd.com fds_excp_ptr ? &ex_h : nullptr, 259513570Sbrandon.potter@amd.com &tv); 259613570Sbrandon.potter@amd.com 259713570Sbrandon.potter@amd.com if (retval == 0) { 259813570Sbrandon.potter@amd.com /** 259913570Sbrandon.potter@amd.com * If blocking indefinitely, check the signal list to see if a 260013570Sbrandon.potter@amd.com * signal would break the poll out of the retry cycle and try to 260113570Sbrandon.potter@amd.com * return the signal interrupt instead. 260213570Sbrandon.potter@amd.com */ 260313570Sbrandon.potter@amd.com for (auto sig : tc->getSystemPtr()->signalList) 260413570Sbrandon.potter@amd.com if (sig.receiver == p) 260513570Sbrandon.potter@amd.com return -EINTR; 260613570Sbrandon.potter@amd.com return SyscallReturn::retry(); 260713570Sbrandon.potter@amd.com } 260813570Sbrandon.potter@amd.com } 260913570Sbrandon.potter@amd.com 261013570Sbrandon.potter@amd.com if (retval == -1) 261113570Sbrandon.potter@amd.com return -errno; 261213570Sbrandon.potter@amd.com 261313570Sbrandon.potter@amd.com FD_ZERO((fd_set*)&*rd_t); 261413570Sbrandon.potter@amd.com FD_ZERO((fd_set*)&*wr_t); 261513570Sbrandon.potter@amd.com FD_ZERO((fd_set*)&*ex_t); 261613570Sbrandon.potter@amd.com 261713570Sbrandon.potter@amd.com /** 261813570Sbrandon.potter@amd.com * We need to translate the host file descriptor set into a target file 261913570Sbrandon.potter@amd.com * descriptor set. This involves both our internal process fd array 262013570Sbrandon.potter@amd.com * and the fd_set defined in header files. 262113570Sbrandon.potter@amd.com */ 262213570Sbrandon.potter@amd.com for (int i = 0; i < nfds_h; i++) { 262313570Sbrandon.potter@amd.com if (fds_read_ptr) { 262413570Sbrandon.potter@amd.com if (FD_ISSET(i, &rd_h)) 262513570Sbrandon.potter@amd.com FD_SET(trans_map[i], (fd_set*)&*rd_t); 262613570Sbrandon.potter@amd.com } 262713570Sbrandon.potter@amd.com 262813570Sbrandon.potter@amd.com if (fds_writ_ptr) { 262913570Sbrandon.potter@amd.com if (FD_ISSET(i, &wr_h)) 263013570Sbrandon.potter@amd.com FD_SET(trans_map[i], (fd_set*)&*wr_t); 263113570Sbrandon.potter@amd.com } 263213570Sbrandon.potter@amd.com 263313570Sbrandon.potter@amd.com if (fds_excp_ptr) { 263413570Sbrandon.potter@amd.com if (FD_ISSET(i, &ex_h)) 263513570Sbrandon.potter@amd.com FD_SET(trans_map[i], (fd_set*)&*ex_t); 263613570Sbrandon.potter@amd.com } 263713570Sbrandon.potter@amd.com } 263813570Sbrandon.potter@amd.com 263913570Sbrandon.potter@amd.com if (fds_read_ptr) 264013570Sbrandon.potter@amd.com rd_t.copyOut(tc->getMemProxy()); 264113570Sbrandon.potter@amd.com if (fds_writ_ptr) 264213570Sbrandon.potter@amd.com wr_t.copyOut(tc->getMemProxy()); 264313570Sbrandon.potter@amd.com if (fds_excp_ptr) 264413570Sbrandon.potter@amd.com ex_t.copyOut(tc->getMemProxy()); 264513570Sbrandon.potter@amd.com if (time_val_ptr) 264613570Sbrandon.potter@amd.com tp.copyOut(tc->getMemProxy()); 264713570Sbrandon.potter@amd.com 264813570Sbrandon.potter@amd.com return retval; 264913570Sbrandon.potter@amd.com} 265013570Sbrandon.potter@amd.com 265113570Sbrandon.potter@amd.comtemplate <class OS> 265213570Sbrandon.potter@amd.comSyscallReturn 265313570Sbrandon.potter@amd.comreadFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 265413570Sbrandon.potter@amd.com{ 265513570Sbrandon.potter@amd.com int index = 0; 265613570Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 265713570Sbrandon.potter@amd.com Addr buf_ptr = p->getSyscallArg(tc, index); 265813570Sbrandon.potter@amd.com int nbytes = p->getSyscallArg(tc, index); 265913570Sbrandon.potter@amd.com 266013570Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 266113570Sbrandon.potter@amd.com if (!hbfdp) 266213570Sbrandon.potter@amd.com return -EBADF; 266313570Sbrandon.potter@amd.com int sim_fd = hbfdp->getSimFD(); 266413570Sbrandon.potter@amd.com 266513570Sbrandon.potter@amd.com struct pollfd pfd; 266613570Sbrandon.potter@amd.com pfd.fd = sim_fd; 266713570Sbrandon.potter@amd.com pfd.events = POLLIN | POLLPRI; 266813570Sbrandon.potter@amd.com if ((poll(&pfd, 1, 0) == 0) 266913570Sbrandon.potter@amd.com && !(hbfdp->getFlags() & OS::TGT_O_NONBLOCK)) 267013570Sbrandon.potter@amd.com return SyscallReturn::retry(); 267113570Sbrandon.potter@amd.com 267213570Sbrandon.potter@amd.com BufferArg buf_arg(buf_ptr, nbytes); 267313570Sbrandon.potter@amd.com int bytes_read = read(sim_fd, buf_arg.bufferPtr(), nbytes); 267413570Sbrandon.potter@amd.com 267513570Sbrandon.potter@amd.com if (bytes_read > 0) 267613570Sbrandon.potter@amd.com buf_arg.copyOut(tc->getMemProxy()); 267713570Sbrandon.potter@amd.com 267813570Sbrandon.potter@amd.com return (bytes_read == -1) ? -errno : bytes_read; 267913570Sbrandon.potter@amd.com} 268013570Sbrandon.potter@amd.com 268113570Sbrandon.potter@amd.comtemplate <class OS> 268213570Sbrandon.potter@amd.comSyscallReturn 268313570Sbrandon.potter@amd.comwriteFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 268413570Sbrandon.potter@amd.com{ 268513570Sbrandon.potter@amd.com int index = 0; 268613570Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 268713570Sbrandon.potter@amd.com Addr buf_ptr = p->getSyscallArg(tc, index); 268813570Sbrandon.potter@amd.com int nbytes = p->getSyscallArg(tc, index); 268913570Sbrandon.potter@amd.com 269013570Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 269113570Sbrandon.potter@amd.com if (!hbfdp) 269213570Sbrandon.potter@amd.com return -EBADF; 269313570Sbrandon.potter@amd.com int sim_fd = hbfdp->getSimFD(); 269413570Sbrandon.potter@amd.com 269513570Sbrandon.potter@amd.com BufferArg buf_arg(buf_ptr, nbytes); 269613570Sbrandon.potter@amd.com buf_arg.copyIn(tc->getMemProxy()); 269713570Sbrandon.potter@amd.com 269813570Sbrandon.potter@amd.com struct pollfd pfd; 269913570Sbrandon.potter@amd.com pfd.fd = sim_fd; 270013570Sbrandon.potter@amd.com pfd.events = POLLOUT; 270113570Sbrandon.potter@amd.com 270213570Sbrandon.potter@amd.com /** 270313570Sbrandon.potter@amd.com * We don't want to poll on /dev/random. The kernel will not enable the 270413570Sbrandon.potter@amd.com * file descriptor for writing unless the entropy in the system falls 270513570Sbrandon.potter@amd.com * below write_wakeup_threshold. This is not guaranteed to happen 270613570Sbrandon.potter@amd.com * depending on host settings. 270713570Sbrandon.potter@amd.com */ 270813570Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(hbfdp); 270913570Sbrandon.potter@amd.com if (ffdp && (ffdp->getFileName() != "/dev/random")) { 271013570Sbrandon.potter@amd.com if (!poll(&pfd, 1, 0) && !(ffdp->getFlags() & OS::TGT_O_NONBLOCK)) 271113570Sbrandon.potter@amd.com return SyscallReturn::retry(); 271213570Sbrandon.potter@amd.com } 271313570Sbrandon.potter@amd.com 271413570Sbrandon.potter@amd.com int bytes_written = write(sim_fd, buf_arg.bufferPtr(), nbytes); 271513570Sbrandon.potter@amd.com 271613570Sbrandon.potter@amd.com if (bytes_written != -1) 271713570Sbrandon.potter@amd.com fsync(sim_fd); 271813570Sbrandon.potter@amd.com 271913570Sbrandon.potter@amd.com return (bytes_written == -1) ? -errno : bytes_written; 272013570Sbrandon.potter@amd.com} 272113570Sbrandon.potter@amd.com 272213570Sbrandon.potter@amd.comtemplate <class OS> 272313570Sbrandon.potter@amd.comSyscallReturn 272413570Sbrandon.potter@amd.comwait4Func(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 272513570Sbrandon.potter@amd.com{ 272613570Sbrandon.potter@amd.com int index = 0; 272713570Sbrandon.potter@amd.com pid_t pid = p->getSyscallArg(tc, index); 272813570Sbrandon.potter@amd.com Addr statPtr = p->getSyscallArg(tc, index); 272913570Sbrandon.potter@amd.com int options = p->getSyscallArg(tc, index); 273013570Sbrandon.potter@amd.com Addr rusagePtr = p->getSyscallArg(tc, index); 273113570Sbrandon.potter@amd.com 273213570Sbrandon.potter@amd.com if (rusagePtr) 273313907Salexandru.dutu@amd.com DPRINTF_SYSCALL(Verbose, "wait4: rusage pointer provided %lx, however " 273413570Sbrandon.potter@amd.com "functionality not supported. Ignoring rusage pointer.\n", 273513907Salexandru.dutu@amd.com rusagePtr); 273613570Sbrandon.potter@amd.com 273713570Sbrandon.potter@amd.com /** 273813570Sbrandon.potter@amd.com * Currently, wait4 is only implemented so that it will wait for children 273913570Sbrandon.potter@amd.com * exit conditions which are denoted by a SIGCHLD signals posted into the 274013570Sbrandon.potter@amd.com * system signal list. We return no additional information via any of the 274113570Sbrandon.potter@amd.com * parameters supplied to wait4. If nothing is found in the system signal 274213570Sbrandon.potter@amd.com * list, we will wait indefinitely for SIGCHLD to post by retrying the 274313570Sbrandon.potter@amd.com * call. 274413570Sbrandon.potter@amd.com */ 274513570Sbrandon.potter@amd.com System *sysh = tc->getSystemPtr(); 274613570Sbrandon.potter@amd.com std::list<BasicSignal>::iterator iter; 274713570Sbrandon.potter@amd.com for (iter=sysh->signalList.begin(); iter!=sysh->signalList.end(); iter++) { 274813570Sbrandon.potter@amd.com if (iter->receiver == p) { 274913570Sbrandon.potter@amd.com if (pid < -1) { 275013570Sbrandon.potter@amd.com if ((iter->sender->pgid() == -pid) 275113570Sbrandon.potter@amd.com && (iter->signalValue == OS::TGT_SIGCHLD)) 275213570Sbrandon.potter@amd.com goto success; 275313570Sbrandon.potter@amd.com } else if (pid == -1) { 275413570Sbrandon.potter@amd.com if (iter->signalValue == OS::TGT_SIGCHLD) 275513570Sbrandon.potter@amd.com goto success; 275613570Sbrandon.potter@amd.com } else if (pid == 0) { 275713570Sbrandon.potter@amd.com if ((iter->sender->pgid() == p->pgid()) 275813570Sbrandon.potter@amd.com && (iter->signalValue == OS::TGT_SIGCHLD)) 275913570Sbrandon.potter@amd.com goto success; 276013570Sbrandon.potter@amd.com } else { 276113570Sbrandon.potter@amd.com if ((iter->sender->pid() == pid) 276213570Sbrandon.potter@amd.com && (iter->signalValue == OS::TGT_SIGCHLD)) 276313570Sbrandon.potter@amd.com goto success; 276413570Sbrandon.potter@amd.com } 276513570Sbrandon.potter@amd.com } 276613570Sbrandon.potter@amd.com } 276713570Sbrandon.potter@amd.com 276813570Sbrandon.potter@amd.com return (options & OS::TGT_WNOHANG) ? 0 : SyscallReturn::retry(); 276913570Sbrandon.potter@amd.com 277013570Sbrandon.potter@amd.comsuccess: 277113570Sbrandon.potter@amd.com // Set status to EXITED for WIFEXITED evaluations. 277213570Sbrandon.potter@amd.com const int EXITED = 0; 277313570Sbrandon.potter@amd.com BufferArg statusBuf(statPtr, sizeof(int)); 277413570Sbrandon.potter@amd.com *(int *)statusBuf.bufferPtr() = EXITED; 277513570Sbrandon.potter@amd.com statusBuf.copyOut(tc->getMemProxy()); 277613570Sbrandon.potter@amd.com 277713570Sbrandon.potter@amd.com // Return the child PID. 277813570Sbrandon.potter@amd.com pid_t retval = iter->sender->pid(); 277913570Sbrandon.potter@amd.com sysh->signalList.erase(iter); 278013570Sbrandon.potter@amd.com return retval; 278113570Sbrandon.potter@amd.com} 278213570Sbrandon.potter@amd.com 278313570Sbrandon.potter@amd.comtemplate <class OS> 278413570Sbrandon.potter@amd.comSyscallReturn 278513570Sbrandon.potter@amd.comacceptFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 278613570Sbrandon.potter@amd.com{ 278713570Sbrandon.potter@amd.com struct sockaddr sa; 278813570Sbrandon.potter@amd.com socklen_t addrLen; 278913570Sbrandon.potter@amd.com int host_fd; 279013570Sbrandon.potter@amd.com int index = 0; 279113570Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 279213570Sbrandon.potter@amd.com Addr addrPtr = p->getSyscallArg(tc, index); 279313570Sbrandon.potter@amd.com Addr lenPtr = p->getSyscallArg(tc, index); 279413570Sbrandon.potter@amd.com 279513570Sbrandon.potter@amd.com BufferArg *lenBufPtr = nullptr; 279613570Sbrandon.potter@amd.com BufferArg *addrBufPtr = nullptr; 279713570Sbrandon.potter@amd.com 279813570Sbrandon.potter@amd.com auto sfdp = std::dynamic_pointer_cast<SocketFDEntry>((*p->fds)[tgt_fd]); 279913570Sbrandon.potter@amd.com if (!sfdp) 280013570Sbrandon.potter@amd.com return -EBADF; 280113570Sbrandon.potter@amd.com int sim_fd = sfdp->getSimFD(); 280213570Sbrandon.potter@amd.com 280313570Sbrandon.potter@amd.com /** 280413570Sbrandon.potter@amd.com * We poll the socket file descriptor first to guarantee that we do not 280513570Sbrandon.potter@amd.com * block on our accept call. The socket can be opened without the 280613570Sbrandon.potter@amd.com * non-blocking flag (it blocks). This will cause deadlocks between 280713570Sbrandon.potter@amd.com * communicating processes. 280813570Sbrandon.potter@amd.com */ 280913570Sbrandon.potter@amd.com struct pollfd pfd; 281013570Sbrandon.potter@amd.com pfd.fd = sim_fd; 281113570Sbrandon.potter@amd.com pfd.events = POLLIN | POLLPRI; 281213570Sbrandon.potter@amd.com if ((poll(&pfd, 1, 0) == 0) 281313570Sbrandon.potter@amd.com && !(sfdp->getFlags() & OS::TGT_O_NONBLOCK)) 281413570Sbrandon.potter@amd.com return SyscallReturn::retry(); 281513570Sbrandon.potter@amd.com 281613570Sbrandon.potter@amd.com if (lenPtr) { 281713570Sbrandon.potter@amd.com lenBufPtr = new BufferArg(lenPtr, sizeof(socklen_t)); 281813570Sbrandon.potter@amd.com lenBufPtr->copyIn(tc->getMemProxy()); 281913570Sbrandon.potter@amd.com memcpy(&addrLen, (socklen_t *)lenBufPtr->bufferPtr(), 282013570Sbrandon.potter@amd.com sizeof(socklen_t)); 282113570Sbrandon.potter@amd.com } 282213570Sbrandon.potter@amd.com 282313570Sbrandon.potter@amd.com if (addrPtr) { 282413570Sbrandon.potter@amd.com addrBufPtr = new BufferArg(addrPtr, sizeof(struct sockaddr)); 282513570Sbrandon.potter@amd.com addrBufPtr->copyIn(tc->getMemProxy()); 282613570Sbrandon.potter@amd.com memcpy(&sa, (struct sockaddr *)addrBufPtr->bufferPtr(), 282713570Sbrandon.potter@amd.com sizeof(struct sockaddr)); 282813570Sbrandon.potter@amd.com } 282913570Sbrandon.potter@amd.com 283013570Sbrandon.potter@amd.com host_fd = accept(sim_fd, &sa, &addrLen); 283113570Sbrandon.potter@amd.com 283213570Sbrandon.potter@amd.com if (host_fd == -1) 283313570Sbrandon.potter@amd.com return -errno; 283413570Sbrandon.potter@amd.com 283513570Sbrandon.potter@amd.com if (addrPtr) { 283613570Sbrandon.potter@amd.com memcpy(addrBufPtr->bufferPtr(), &sa, sizeof(sa)); 283713570Sbrandon.potter@amd.com addrBufPtr->copyOut(tc->getMemProxy()); 283813570Sbrandon.potter@amd.com delete(addrBufPtr); 283913570Sbrandon.potter@amd.com } 284013570Sbrandon.potter@amd.com 284113570Sbrandon.potter@amd.com if (lenPtr) { 284213570Sbrandon.potter@amd.com *(socklen_t *)lenBufPtr->bufferPtr() = addrLen; 284313570Sbrandon.potter@amd.com lenBufPtr->copyOut(tc->getMemProxy()); 284413570Sbrandon.potter@amd.com delete(lenBufPtr); 284513570Sbrandon.potter@amd.com } 284613570Sbrandon.potter@amd.com 284713570Sbrandon.potter@amd.com auto afdp = std::make_shared<SocketFDEntry>(host_fd, sfdp->_domain, 284813570Sbrandon.potter@amd.com sfdp->_type, sfdp->_protocol); 284913570Sbrandon.potter@amd.com return p->fds->allocFD(afdp); 285013570Sbrandon.potter@amd.com} 285113570Sbrandon.potter@amd.com 285213933Sbrandon.potter@amd.com/// Target eventfd() function. 285313933Sbrandon.potter@amd.comtemplate <class OS> 285413933Sbrandon.potter@amd.comSyscallReturn 285513933Sbrandon.potter@amd.comeventfdFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 285613933Sbrandon.potter@amd.com{ 285713936SAndrea.Mondelli@ucf.edu#if defined(__linux__) 285813933Sbrandon.potter@amd.com int index = 0; 285913933Sbrandon.potter@amd.com unsigned initval = p->getSyscallArg(tc, index); 286013933Sbrandon.potter@amd.com int in_flags = p->getSyscallArg(tc, index); 286113933Sbrandon.potter@amd.com 286213933Sbrandon.potter@amd.com int sim_fd = eventfd(initval, in_flags); 286313933Sbrandon.potter@amd.com if (sim_fd == -1) 286413933Sbrandon.potter@amd.com return -errno; 286513933Sbrandon.potter@amd.com 286613933Sbrandon.potter@amd.com bool cloexec = in_flags & OS::TGT_O_CLOEXEC; 286713933Sbrandon.potter@amd.com 286813933Sbrandon.potter@amd.com int flags = cloexec ? OS::TGT_O_CLOEXEC : 0; 286913933Sbrandon.potter@amd.com flags |= (in_flags & OS::TGT_O_NONBLOCK) ? OS::TGT_O_NONBLOCK : 0; 287013933Sbrandon.potter@amd.com 287113933Sbrandon.potter@amd.com auto hbfdp = std::make_shared<HBFDEntry>(flags, sim_fd, cloexec); 287213933Sbrandon.potter@amd.com int tgt_fd = p->fds->allocFD(hbfdp); 287313933Sbrandon.potter@amd.com return tgt_fd; 287413933Sbrandon.potter@amd.com#else 287513933Sbrandon.potter@amd.com warnUnsupportedOS("eventfd"); 287613933Sbrandon.potter@amd.com return -1; 287713933Sbrandon.potter@amd.com#endif 287813933Sbrandon.potter@amd.com} 287913933Sbrandon.potter@amd.com 28801354SN/A#endif // __SIM_SYSCALL_EMUL_HH__ 2881