syscall_emul.hh revision 13902
1360SN/A/* 210850SGiacomo.Gabrielli@arm.com * Copyright (c) 2012-2013, 2015 ARM Limited 310796Sbrandon.potter@amd.com * Copyright (c) 2015 Advanced Micro Devices, Inc. 410027SChris.Adeniyi-Jones@arm.com * All rights reserved 510027SChris.Adeniyi-Jones@arm.com * 610027SChris.Adeniyi-Jones@arm.com * The license below extends only to copyright in the software and shall 710027SChris.Adeniyi-Jones@arm.com * not be construed as granting a license to any other intellectual 810027SChris.Adeniyi-Jones@arm.com * property including but not limited to intellectual property relating 910027SChris.Adeniyi-Jones@arm.com * to a hardware implementation of the functionality of the software 1010027SChris.Adeniyi-Jones@arm.com * licensed hereunder. You may use the software subject to the license 1110027SChris.Adeniyi-Jones@arm.com * terms below provided that you ensure that this notice is replicated 1210027SChris.Adeniyi-Jones@arm.com * unmodified and in its entirety in all distributions of the software, 1310027SChris.Adeniyi-Jones@arm.com * modified or unmodified, in source code or in binary form. 1410027SChris.Adeniyi-Jones@arm.com * 151458SN/A * Copyright (c) 2003-2005 The Regents of The University of Michigan 16360SN/A * All rights reserved. 17360SN/A * 18360SN/A * Redistribution and use in source and binary forms, with or without 19360SN/A * modification, are permitted provided that the following conditions are 20360SN/A * met: redistributions of source code must retain the above copyright 21360SN/A * notice, this list of conditions and the following disclaimer; 22360SN/A * redistributions in binary form must reproduce the above copyright 23360SN/A * notice, this list of conditions and the following disclaimer in the 24360SN/A * documentation and/or other materials provided with the distribution; 25360SN/A * neither the name of the copyright holders nor the names of its 26360SN/A * contributors may be used to endorse or promote products derived from 27360SN/A * this software without specific prior written permission. 28360SN/A * 29360SN/A * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 30360SN/A * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 31360SN/A * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 32360SN/A * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 33360SN/A * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 34360SN/A * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 35360SN/A * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 36360SN/A * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 37360SN/A * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 38360SN/A * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 39360SN/A * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 402665Ssaidi@eecs.umich.edu * 412665Ssaidi@eecs.umich.edu * Authors: Steve Reinhardt 422665Ssaidi@eecs.umich.edu * Kevin Lim 43360SN/A */ 44360SN/A 451354SN/A#ifndef __SIM_SYSCALL_EMUL_HH__ 461354SN/A#define __SIM_SYSCALL_EMUL_HH__ 47360SN/A 4812018Sandreas.sandberg@arm.com#if (defined(__APPLE__) || defined(__OpenBSD__) || \ 4912018Sandreas.sandberg@arm.com defined(__FreeBSD__) || defined(__CYGWIN__) || \ 5012018Sandreas.sandberg@arm.com defined(__NetBSD__)) 5112018Sandreas.sandberg@arm.com#define NO_STAT64 1 5212018Sandreas.sandberg@arm.com#else 5312018Sandreas.sandberg@arm.com#define NO_STAT64 0 5412018Sandreas.sandberg@arm.com#endif 552064SN/A 5612018Sandreas.sandberg@arm.com#if (defined(__APPLE__) || defined(__OpenBSD__) || \ 5712018Sandreas.sandberg@arm.com defined(__FreeBSD__) || defined(__NetBSD__)) 5812018Sandreas.sandberg@arm.com#define NO_STATFS 1 5912018Sandreas.sandberg@arm.com#else 6012018Sandreas.sandberg@arm.com#define NO_STATFS 0 6112018Sandreas.sandberg@arm.com#endif 6211799Sbrandon.potter@amd.com 6312018Sandreas.sandberg@arm.com#if (defined(__APPLE__) || defined(__OpenBSD__) || \ 6412018Sandreas.sandberg@arm.com defined(__FreeBSD__) || defined(__NetBSD__)) 6512018Sandreas.sandberg@arm.com#define NO_FALLOCATE 1 6612018Sandreas.sandberg@arm.com#else 6712018Sandreas.sandberg@arm.com#define NO_FALLOCATE 0 6812018Sandreas.sandberg@arm.com#endif 6911799Sbrandon.potter@amd.com 70360SN/A/// 71360SN/A/// @file syscall_emul.hh 72360SN/A/// 73360SN/A/// This file defines objects used to emulate syscalls from the target 74360SN/A/// application on the host machine. 75360SN/A 761809SN/A#ifdef __CYGWIN32__ 7711800Sbrandon.potter@amd.com#include <sys/fcntl.h> 7811392Sbrandon.potter@amd.com 791809SN/A#endif 8011392Sbrandon.potter@amd.com#include <fcntl.h> 8113902Sbrandon.potter@amd.com#include <net/if.h> 8213570Sbrandon.potter@amd.com#include <poll.h> 8313902Sbrandon.potter@amd.com#include <sys/ioctl.h> 8411383Sbrandon.potter@amd.com#include <sys/mman.h> 8513568Sbrandon.potter@amd.com#include <sys/socket.h> 863113Sgblack@eecs.umich.edu#include <sys/stat.h> 8713902Sbrandon.potter@amd.com 8811799Sbrandon.potter@amd.com#if (NO_STATFS == 0) 8911759Sbrandon.potter@amd.com#include <sys/statfs.h> 9013902Sbrandon.potter@amd.com 9111812Sbaz21@cam.ac.uk#else 9211812Sbaz21@cam.ac.uk#include <sys/mount.h> 9313902Sbrandon.potter@amd.com 9411799Sbrandon.potter@amd.com#endif 958229Snate@binkert.org#include <sys/time.h> 9613570Sbrandon.potter@amd.com#include <sys/types.h> 978229Snate@binkert.org#include <sys/uio.h> 9811594Santhony.gutierrez@amd.com#include <unistd.h> 997075Snate@binkert.org 1008229Snate@binkert.org#include <cerrno> 10111856Sbrandon.potter@amd.com#include <memory> 1027075Snate@binkert.org#include <string> 103360SN/A 10412461Sgabeblack@google.com#include "arch/generic/tlb.hh" 10511886Sbrandon.potter@amd.com#include "arch/utility.hh" 10611800Sbrandon.potter@amd.com#include "base/intmath.hh" 10711392Sbrandon.potter@amd.com#include "base/loader/object_file.hh" 10812334Sgabeblack@google.com#include "base/logging.hh" 1091354SN/A#include "base/trace.hh" 1106216Snate@binkert.org#include "base/types.hh" 1116658Snate@binkert.org#include "config/the_isa.hh" 1122474SN/A#include "cpu/base.hh" 1132680Sktlim@umich.edu#include "cpu/thread_context.hh" 1148229Snate@binkert.org#include "mem/page_table.hh" 11511886Sbrandon.potter@amd.com#include "params/Process.hh" 11610496Ssteve.reinhardt@amd.com#include "sim/emul_driver.hh" 11711911SBrandon.Potter@amd.com#include "sim/futex_map.hh" 1188229Snate@binkert.org#include "sim/process.hh" 11911794Sbrandon.potter@amd.com#include "sim/syscall_debug_macros.hh" 12011886Sbrandon.potter@amd.com#include "sim/syscall_desc.hh" 12110497Ssteve.reinhardt@amd.com#include "sim/syscall_emul_buf.hh" 12211794Sbrandon.potter@amd.com#include "sim/syscall_return.hh" 123360SN/A 12413629SAndrea.Mondelli@ucf.edu#if defined(__APPLE__) && defined(__MACH__) && !defined(CMSG_ALIGN) 12513629SAndrea.Mondelli@ucf.edu#define CMSG_ALIGN(len) (((len) + sizeof(size_t) - 1) & ~(sizeof(size_t) - 1)) 12613629SAndrea.Mondelli@ucf.edu#endif 12713629SAndrea.Mondelli@ucf.edu 128360SN/A////////////////////////////////////////////////////////////////////// 129360SN/A// 130360SN/A// The following emulation functions are generic enough that they 131360SN/A// don't need to be recompiled for different emulated OS's. They are 132360SN/A// defined in sim/syscall_emul.cc. 133360SN/A// 134360SN/A////////////////////////////////////////////////////////////////////// 135360SN/A 136360SN/A 137378SN/A/// Handler for unimplemented syscalls that we haven't thought about. 1381706SN/ASyscallReturn unimplementedFunc(SyscallDesc *desc, int num, 13911851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 140378SN/A 141378SN/A/// Handler for unimplemented syscalls that we never intend to 142378SN/A/// implement (signal handling, etc.) and should not affect the correct 143378SN/A/// behavior of the program. Print a warning only if the appropriate 144378SN/A/// trace flag is enabled. Return success to the target program. 1451706SN/ASyscallReturn ignoreFunc(SyscallDesc *desc, int num, 14611851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 147360SN/A 14811760Sbrandon.potter@amd.com// Target fallocateFunc() handler. 14911760Sbrandon.potter@amd.comSyscallReturn fallocateFunc(SyscallDesc *desc, int num, 15011851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 15111760Sbrandon.potter@amd.com 1526109Ssanchezd@stanford.edu/// Target exit() handler: terminate current context. 1531706SN/ASyscallReturn exitFunc(SyscallDesc *desc, int num, 15411851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 155378SN/A 1566109Ssanchezd@stanford.edu/// Target exit_group() handler: terminate simulation. (exit all threads) 1576109Ssanchezd@stanford.eduSyscallReturn exitGroupFunc(SyscallDesc *desc, int num, 15811851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 1596109Ssanchezd@stanford.edu 16011886Sbrandon.potter@amd.com/// Target set_tid_address() handler. 16111886Sbrandon.potter@amd.comSyscallReturn setTidAddressFunc(SyscallDesc *desc, int num, 16211886Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 16311886Sbrandon.potter@amd.com 164378SN/A/// Target getpagesize() handler. 1651706SN/ASyscallReturn getpagesizeFunc(SyscallDesc *desc, int num, 16611851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 167378SN/A 1685748SSteve.Reinhardt@amd.com/// Target brk() handler: set brk address. 1695748SSteve.Reinhardt@amd.comSyscallReturn brkFunc(SyscallDesc *desc, int num, 17011851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 171378SN/A 172378SN/A/// Target close() handler. 1731706SN/ASyscallReturn closeFunc(SyscallDesc *desc, int num, 17411851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 175378SN/A 176378SN/A/// Target lseek() handler. 1771706SN/ASyscallReturn lseekFunc(SyscallDesc *desc, int num, 17811851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 179378SN/A 1804118Sgblack@eecs.umich.edu/// Target _llseek() handler. 1814118Sgblack@eecs.umich.eduSyscallReturn _llseekFunc(SyscallDesc *desc, int num, 18211851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 1834118Sgblack@eecs.umich.edu 184378SN/A/// Target munmap() handler. 1851706SN/ASyscallReturn munmapFunc(SyscallDesc *desc, int num, 18611851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 187378SN/A 18813568Sbrandon.potter@amd.com/// Target shutdown() handler. 18913568Sbrandon.potter@amd.comSyscallReturn shutdownFunc(SyscallDesc *desc, int num, 19013568Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 19113568Sbrandon.potter@amd.com 192378SN/A/// Target gethostname() handler. 1931706SN/ASyscallReturn gethostnameFunc(SyscallDesc *desc, int num, 19411851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 195360SN/A 1965513SMichael.Adler@intel.com/// Target getcwd() handler. 1975513SMichael.Adler@intel.comSyscallReturn getcwdFunc(SyscallDesc *desc, int num, 19811851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 1995513SMichael.Adler@intel.com 20010203SAli.Saidi@ARM.com/// Target readlink() handler. 20110203SAli.Saidi@ARM.comSyscallReturn readlinkFunc(SyscallDesc *desc, int num, 20211851Sbrandon.potter@amd.com Process *p, ThreadContext *tc, 20310203SAli.Saidi@ARM.com int index = 0); 2045513SMichael.Adler@intel.comSyscallReturn readlinkFunc(SyscallDesc *desc, int num, 20511851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2065513SMichael.Adler@intel.com 207511SN/A/// Target unlink() handler. 20810633Smichaelupton@gmail.comSyscallReturn unlinkHelper(SyscallDesc *desc, int num, 20911851Sbrandon.potter@amd.com Process *p, ThreadContext *tc, 21010633Smichaelupton@gmail.com int index); 2111706SN/ASyscallReturn unlinkFunc(SyscallDesc *desc, int num, 21211851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 213511SN/A 21412795Smattdsinclair@gmail.com/// Target link() handler 21512795Smattdsinclair@gmail.comSyscallReturn linkFunc(SyscallDesc *desc, int num, Process *p, 21612795Smattdsinclair@gmail.com ThreadContext *tc); 21712795Smattdsinclair@gmail.com 21812796Smattdsinclair@gmail.com/// Target symlink() handler. 21912796Smattdsinclair@gmail.comSyscallReturn symlinkFunc(SyscallDesc *desc, int num, Process *p, 22012796Smattdsinclair@gmail.com ThreadContext *tc); 22112796Smattdsinclair@gmail.com 2225513SMichael.Adler@intel.com/// Target mkdir() handler. 2235513SMichael.Adler@intel.comSyscallReturn mkdirFunc(SyscallDesc *desc, int num, 22411851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2255513SMichael.Adler@intel.com 22613031Sbrandon.potter@amd.com/// Target mknod() handler. 22713031Sbrandon.potter@amd.comSyscallReturn mknodFunc(SyscallDesc *desc, int num, 22813031Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 22913031Sbrandon.potter@amd.com 23013031Sbrandon.potter@amd.com/// Target chdir() handler. 23113031Sbrandon.potter@amd.comSyscallReturn chdirFunc(SyscallDesc *desc, int num, 23213031Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 23313031Sbrandon.potter@amd.com 23413031Sbrandon.potter@amd.com// Target rmdir() handler. 23513031Sbrandon.potter@amd.comSyscallReturn rmdirFunc(SyscallDesc *desc, int num, 23613031Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 23713031Sbrandon.potter@amd.com 238511SN/A/// Target rename() handler. 2391706SN/ASyscallReturn renameFunc(SyscallDesc *desc, int num, 24011851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2411706SN/A 2421706SN/A 2431706SN/A/// Target truncate() handler. 2441706SN/ASyscallReturn truncateFunc(SyscallDesc *desc, int num, 24511851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2461706SN/A 2471706SN/A 2481706SN/A/// Target ftruncate() handler. 2491706SN/ASyscallReturn ftruncateFunc(SyscallDesc *desc, int num, 25011851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2511706SN/A 252511SN/A 2536703Svince@csl.cornell.edu/// Target truncate64() handler. 2546703Svince@csl.cornell.eduSyscallReturn truncate64Func(SyscallDesc *desc, int num, 25511851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2566703Svince@csl.cornell.edu 2576685Stjones1@inf.ed.ac.uk/// Target ftruncate64() handler. 2586685Stjones1@inf.ed.ac.ukSyscallReturn ftruncate64Func(SyscallDesc *desc, int num, 25911851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2606685Stjones1@inf.ed.ac.uk 2616685Stjones1@inf.ed.ac.uk 2625513SMichael.Adler@intel.com/// Target umask() handler. 2635513SMichael.Adler@intel.comSyscallReturn umaskFunc(SyscallDesc *desc, int num, 26411851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2655513SMichael.Adler@intel.com 26611885Sbrandon.potter@amd.com/// Target gettid() handler. 26711885Sbrandon.potter@amd.comSyscallReturn gettidFunc(SyscallDesc *desc, int num, 26811885Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2695513SMichael.Adler@intel.com 2701999SN/A/// Target chown() handler. 2711999SN/ASyscallReturn chownFunc(SyscallDesc *desc, int num, 27211851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2731999SN/A 27411885Sbrandon.potter@amd.com/// Target setpgid() handler. 27511885Sbrandon.potter@amd.comSyscallReturn setpgidFunc(SyscallDesc *desc, int num, 27611885Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2771999SN/A 2781999SN/A/// Target fchown() handler. 2791999SN/ASyscallReturn fchownFunc(SyscallDesc *desc, int num, 28011851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 2811999SN/A 2823079Sstever@eecs.umich.edu/// Target dup() handler. 2833079Sstever@eecs.umich.eduSyscallReturn dupFunc(SyscallDesc *desc, int num, 28411851Sbrandon.potter@amd.com Process *process, ThreadContext *tc); 2853079Sstever@eecs.umich.edu 28611908SBrandon.Potter@amd.com/// Target dup2() handler. 28711908SBrandon.Potter@amd.comSyscallReturn dup2Func(SyscallDesc *desc, int num, 28811908SBrandon.Potter@amd.com Process *process, ThreadContext *tc); 28911908SBrandon.Potter@amd.com 29011875Sbrandon.potter@amd.com/// Target fcntl() handler. 2912093SN/ASyscallReturn fcntlFunc(SyscallDesc *desc, int num, 29211851Sbrandon.potter@amd.com Process *process, ThreadContext *tc); 2932093SN/A 2942687Sksewell@umich.edu/// Target fcntl64() handler. 2952687Sksewell@umich.eduSyscallReturn fcntl64Func(SyscallDesc *desc, int num, 29611851Sbrandon.potter@amd.com Process *process, ThreadContext *tc); 2972687Sksewell@umich.edu 2982238SN/A/// Target setuid() handler. 2992238SN/ASyscallReturn setuidFunc(SyscallDesc *desc, int num, 30011851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3012238SN/A 30211908SBrandon.Potter@amd.com/// Target pipe() handler. 30311908SBrandon.Potter@amd.comSyscallReturn pipeFunc(SyscallDesc *desc, int num, 30411908SBrandon.Potter@amd.com Process *p, ThreadContext *tc); 30511908SBrandon.Potter@amd.com 30611908SBrandon.Potter@amd.com/// Internal pipe() handler. 30711908SBrandon.Potter@amd.comSyscallReturn pipeImpl(SyscallDesc *desc, int num, Process *p, 30811908SBrandon.Potter@amd.com ThreadContext *tc, bool pseudoPipe); 30911908SBrandon.Potter@amd.com 3102238SN/A/// Target getpid() handler. 3112238SN/ASyscallReturn getpidFunc(SyscallDesc *desc, int num, 31211851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3132238SN/A 31413571Sbrandon.potter@amd.com// Target getpeername() handler. 31513571Sbrandon.potter@amd.comSyscallReturn getpeernameFunc(SyscallDesc *desc, int num, 31613571Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 31713571Sbrandon.potter@amd.com 31813568Sbrandon.potter@amd.com// Target bind() handler. 31913568Sbrandon.potter@amd.comSyscallReturn bindFunc(SyscallDesc *desc, int num, 32013568Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 32113568Sbrandon.potter@amd.com 32213568Sbrandon.potter@amd.com// Target listen() handler. 32313568Sbrandon.potter@amd.comSyscallReturn listenFunc(SyscallDesc *desc, int num, 32413568Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 32513568Sbrandon.potter@amd.com 32613568Sbrandon.potter@amd.com// Target connect() handler. 32713568Sbrandon.potter@amd.comSyscallReturn connectFunc(SyscallDesc *desc, int num, 32813568Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 32913568Sbrandon.potter@amd.com 33013448Sciro.santilli@arm.com#if defined(SYS_getdents) 33113031Sbrandon.potter@amd.com// Target getdents() handler. 33213031Sbrandon.potter@amd.comSyscallReturn getdentsFunc(SyscallDesc *desc, int num, 33313031Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 33413448Sciro.santilli@arm.com#endif 33513031Sbrandon.potter@amd.com 33613539Sjavier.setoain@arm.com#if defined(SYS_getdents64) 33713539Sjavier.setoain@arm.com// Target getdents() handler. 33813539Sjavier.setoain@arm.comSyscallReturn getdents64Func(SyscallDesc *desc, int num, 33913539Sjavier.setoain@arm.com Process *p, ThreadContext *tc); 34013539Sjavier.setoain@arm.com#endif 34113539Sjavier.setoain@arm.com 34213569Sbrandon.potter@amd.com// Target sendto() handler. 34313569Sbrandon.potter@amd.comSyscallReturn sendtoFunc(SyscallDesc *desc, int num, 34413569Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 34513569Sbrandon.potter@amd.com 34613569Sbrandon.potter@amd.com// Target recvfrom() handler. 34713569Sbrandon.potter@amd.comSyscallReturn recvfromFunc(SyscallDesc *desc, int num, 34813569Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 34913569Sbrandon.potter@amd.com 35013569Sbrandon.potter@amd.com// Target recvmsg() handler. 35113569Sbrandon.potter@amd.comSyscallReturn recvmsgFunc(SyscallDesc *desc, int num, 35213569Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 35313569Sbrandon.potter@amd.com 35413569Sbrandon.potter@amd.com// Target sendmsg() handler. 35513569Sbrandon.potter@amd.comSyscallReturn sendmsgFunc(SyscallDesc *desc, int num, 35613569Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 35713569Sbrandon.potter@amd.com 35813031Sbrandon.potter@amd.com// Target getuid() handler. 3592238SN/ASyscallReturn getuidFunc(SyscallDesc *desc, int num, 36011851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3612238SN/A 3622238SN/A/// Target getgid() handler. 3632238SN/ASyscallReturn getgidFunc(SyscallDesc *desc, int num, 36411851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3652238SN/A 3662238SN/A/// Target getppid() handler. 3672238SN/ASyscallReturn getppidFunc(SyscallDesc *desc, int num, 36811851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3692238SN/A 3702238SN/A/// Target geteuid() handler. 3712238SN/ASyscallReturn geteuidFunc(SyscallDesc *desc, int num, 37211851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3732238SN/A 3742238SN/A/// Target getegid() handler. 3752238SN/ASyscallReturn getegidFunc(SyscallDesc *desc, int num, 37611851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 3772238SN/A 3789455Smitch.hayenga+gem5@gmail.com/// Target access() handler 3799455Smitch.hayenga+gem5@gmail.comSyscallReturn accessFunc(SyscallDesc *desc, int num, 38011851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 38110203SAli.Saidi@ARM.comSyscallReturn accessFunc(SyscallDesc *desc, int num, 38211851Sbrandon.potter@amd.com Process *p, ThreadContext *tc, 38311851Sbrandon.potter@amd.com int index); 3849455Smitch.hayenga+gem5@gmail.com 38513571Sbrandon.potter@amd.com// Target getsockopt() handler. 38613571Sbrandon.potter@amd.comSyscallReturn getsockoptFunc(SyscallDesc *desc, int num, 38713571Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 38813571Sbrandon.potter@amd.com 38913571Sbrandon.potter@amd.com// Target setsockopt() handler. 39013571Sbrandon.potter@amd.comSyscallReturn setsockoptFunc(SyscallDesc *desc, int num, 39113571Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 39213571Sbrandon.potter@amd.com 39313571Sbrandon.potter@amd.com// Target getsockname() handler. 39413571Sbrandon.potter@amd.comSyscallReturn getsocknameFunc(SyscallDesc *desc, int num, 39513571Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 39613571Sbrandon.potter@amd.com 3979112Smarc.orr@gmail.com/// Futex system call 39811906SBrandon.Potter@amd.com/// Implemented by Daniel Sanchez 39911906SBrandon.Potter@amd.com/// Used by printf's in multi-threaded apps 4009112Smarc.orr@gmail.comtemplate <class OS> 4019112Smarc.orr@gmail.comSyscallReturn 40211851Sbrandon.potter@amd.comfutexFunc(SyscallDesc *desc, int callnum, Process *process, 4039112Smarc.orr@gmail.com ThreadContext *tc) 4049112Smarc.orr@gmail.com{ 40511911SBrandon.Potter@amd.com using namespace std; 4069112Smarc.orr@gmail.com 40711911SBrandon.Potter@amd.com int index = 0; 40811911SBrandon.Potter@amd.com Addr uaddr = process->getSyscallArg(tc, index); 40911911SBrandon.Potter@amd.com int op = process->getSyscallArg(tc, index); 41011911SBrandon.Potter@amd.com int val = process->getSyscallArg(tc, index); 41113642Sqtt2@cornell.edu int timeout M5_VAR_USED = process->getSyscallArg(tc, index); 41213642Sqtt2@cornell.edu Addr uaddr2 M5_VAR_USED = process->getSyscallArg(tc, index); 41313642Sqtt2@cornell.edu int val3 = process->getSyscallArg(tc, index); 4149112Smarc.orr@gmail.com 41511911SBrandon.Potter@amd.com /* 41611911SBrandon.Potter@amd.com * Unsupported option that does not affect the correctness of the 41711911SBrandon.Potter@amd.com * application. This is a performance optimization utilized by Linux. 41811911SBrandon.Potter@amd.com */ 4199238Slluc.alvarez@bsc.es op &= ~OS::TGT_FUTEX_PRIVATE_FLAG; 42013642Sqtt2@cornell.edu op &= ~OS::TGT_FUTEX_CLOCK_REALTIME_FLAG; 4219112Smarc.orr@gmail.com 42211911SBrandon.Potter@amd.com FutexMap &futex_map = tc->getSystemPtr()->futexMap; 4239112Smarc.orr@gmail.com 42413642Sqtt2@cornell.edu if (OS::TGT_FUTEX_WAIT == op || OS::TGT_FUTEX_WAIT_BITSET == op) { 42511911SBrandon.Potter@amd.com // Ensure futex system call accessed atomically. 42611911SBrandon.Potter@amd.com BufferArg buf(uaddr, sizeof(int)); 42711911SBrandon.Potter@amd.com buf.copyIn(tc->getMemProxy()); 42811911SBrandon.Potter@amd.com int mem_val = *(int*)buf.bufferPtr(); 4299112Smarc.orr@gmail.com 43011911SBrandon.Potter@amd.com /* 43111911SBrandon.Potter@amd.com * The value in memory at uaddr is not equal with the expected val 43211911SBrandon.Potter@amd.com * (a different thread must have changed it before the system call was 43311911SBrandon.Potter@amd.com * invoked). In this case, we need to throw an error. 43411911SBrandon.Potter@amd.com */ 43511911SBrandon.Potter@amd.com if (val != mem_val) 4369112Smarc.orr@gmail.com return -OS::TGT_EWOULDBLOCK; 4379112Smarc.orr@gmail.com 43813642Sqtt2@cornell.edu if (OS::TGT_FUTEX_WAIT) { 43913642Sqtt2@cornell.edu futex_map.suspend(uaddr, process->tgid(), tc); 44013642Sqtt2@cornell.edu } else { 44113642Sqtt2@cornell.edu futex_map.suspend_bitset(uaddr, process->tgid(), tc, val3); 44213642Sqtt2@cornell.edu } 44311911SBrandon.Potter@amd.com 4449112Smarc.orr@gmail.com return 0; 44511911SBrandon.Potter@amd.com } else if (OS::TGT_FUTEX_WAKE == op) { 44611911SBrandon.Potter@amd.com return futex_map.wakeup(uaddr, process->tgid(), val); 44713642Sqtt2@cornell.edu } else if (OS::TGT_FUTEX_WAKE_BITSET == op) { 44813642Sqtt2@cornell.edu return futex_map.wakeup_bitset(uaddr, process->tgid(), val3); 44913650Smw828@cornell.edu } else if (OS::TGT_FUTEX_REQUEUE == op || 45013650Smw828@cornell.edu OS::TGT_FUTEX_CMP_REQUEUE == op) { 45113650Smw828@cornell.edu 45213650Smw828@cornell.edu // Ensure futex system call accessed atomically. 45313650Smw828@cornell.edu BufferArg buf(uaddr, sizeof(int)); 45413650Smw828@cornell.edu buf.copyIn(tc->getMemProxy()); 45513650Smw828@cornell.edu int mem_val = *(int*)buf.bufferPtr(); 45613650Smw828@cornell.edu /* 45713650Smw828@cornell.edu * For CMP_REQUEUE, the whole operation is only started only if 45813650Smw828@cornell.edu * val3 is still the value of the futex pointed to by uaddr. 45913650Smw828@cornell.edu */ 46013650Smw828@cornell.edu if (OS::TGT_FUTEX_CMP_REQUEUE && val3 != mem_val) 46113650Smw828@cornell.edu return -OS::TGT_EWOULDBLOCK; 46213650Smw828@cornell.edu return futex_map.requeue(uaddr, process->tgid(), val, timeout, uaddr2); 46313651Smw828@cornell.edu } else if (OS::TGT_FUTEX_WAKE_OP == op) { 46413651Smw828@cornell.edu /* 46513651Smw828@cornell.edu * The FUTEX_WAKE_OP operation is equivalent to executing the 46613651Smw828@cornell.edu * following code atomically and totally ordered with respect to 46713651Smw828@cornell.edu * other futex operations on any of the two supplied futex words: 46813651Smw828@cornell.edu * 46913651Smw828@cornell.edu * int oldval = *(int *) addr2; 47013651Smw828@cornell.edu * *(int *) addr2 = oldval op oparg; 47113651Smw828@cornell.edu * futex(addr1, FUTEX_WAKE, val, 0, 0, 0); 47213651Smw828@cornell.edu * if (oldval cmp cmparg) 47313651Smw828@cornell.edu * futex(addr2, FUTEX_WAKE, val2, 0, 0, 0); 47413651Smw828@cornell.edu * 47513651Smw828@cornell.edu * (op, oparg, cmp, cmparg are encoded in val3) 47613651Smw828@cornell.edu * 47713651Smw828@cornell.edu * +---+---+-----------+-----------+ 47813651Smw828@cornell.edu * |op |cmp| oparg | cmparg | 47913651Smw828@cornell.edu * +---+---+-----------+-----------+ 48013651Smw828@cornell.edu * 4 4 12 12 <== # of bits 48113651Smw828@cornell.edu * 48213651Smw828@cornell.edu * reference: http://man7.org/linux/man-pages/man2/futex.2.html 48313651Smw828@cornell.edu * 48413651Smw828@cornell.edu */ 48513651Smw828@cornell.edu // get value from simulated-space 48613651Smw828@cornell.edu BufferArg buf(uaddr2, sizeof(int)); 48713651Smw828@cornell.edu buf.copyIn(tc->getMemProxy()); 48813651Smw828@cornell.edu int oldval = *(int*)buf.bufferPtr(); 48913651Smw828@cornell.edu int newval = oldval; 49013651Smw828@cornell.edu // extract op, oparg, cmp, cmparg from val3 49113651Smw828@cornell.edu int wake_cmparg = val3 & 0xfff; 49213651Smw828@cornell.edu int wake_oparg = (val3 & 0xfff000) >> 12; 49313651Smw828@cornell.edu int wake_cmp = (val3 & 0xf000000) >> 24; 49413651Smw828@cornell.edu int wake_op = (val3 & 0xf0000000) >> 28; 49513651Smw828@cornell.edu if ((wake_op & OS::TGT_FUTEX_OP_ARG_SHIFT) >> 3 == 1) 49613651Smw828@cornell.edu wake_oparg = (1 << wake_oparg); 49713651Smw828@cornell.edu wake_op &= ~OS::TGT_FUTEX_OP_ARG_SHIFT; 49813651Smw828@cornell.edu // perform operation on the value of the second futex 49913651Smw828@cornell.edu if (wake_op == OS::TGT_FUTEX_OP_SET) 50013651Smw828@cornell.edu newval = wake_oparg; 50113651Smw828@cornell.edu else if (wake_op == OS::TGT_FUTEX_OP_ADD) 50213651Smw828@cornell.edu newval += wake_oparg; 50313651Smw828@cornell.edu else if (wake_op == OS::TGT_FUTEX_OP_OR) 50413651Smw828@cornell.edu newval |= wake_oparg; 50513651Smw828@cornell.edu else if (wake_op == OS::TGT_FUTEX_OP_ANDN) 50613651Smw828@cornell.edu newval &= ~wake_oparg; 50713651Smw828@cornell.edu else if (wake_op == OS::TGT_FUTEX_OP_XOR) 50813651Smw828@cornell.edu newval ^= wake_oparg; 50913651Smw828@cornell.edu // copy updated value back to simulated-space 51013651Smw828@cornell.edu *(int*)buf.bufferPtr() = newval; 51113651Smw828@cornell.edu buf.copyOut(tc->getMemProxy()); 51213651Smw828@cornell.edu // perform the first wake-up 51313651Smw828@cornell.edu int woken1 = futex_map.wakeup(uaddr, process->tgid(), val); 51413651Smw828@cornell.edu int woken2 = 0; 51513651Smw828@cornell.edu // calculate the condition of the second wake-up 51613651Smw828@cornell.edu bool is_wake2 = false; 51713651Smw828@cornell.edu if (wake_cmp == OS::TGT_FUTEX_OP_CMP_EQ) 51813651Smw828@cornell.edu is_wake2 = oldval == wake_cmparg; 51913651Smw828@cornell.edu else if (wake_cmp == OS::TGT_FUTEX_OP_CMP_NE) 52013651Smw828@cornell.edu is_wake2 = oldval != wake_cmparg; 52113651Smw828@cornell.edu else if (wake_cmp == OS::TGT_FUTEX_OP_CMP_LT) 52213651Smw828@cornell.edu is_wake2 = oldval < wake_cmparg; 52313651Smw828@cornell.edu else if (wake_cmp == OS::TGT_FUTEX_OP_CMP_LE) 52413651Smw828@cornell.edu is_wake2 = oldval <= wake_cmparg; 52513651Smw828@cornell.edu else if (wake_cmp == OS::TGT_FUTEX_OP_CMP_GT) 52613651Smw828@cornell.edu is_wake2 = oldval > wake_cmparg; 52713651Smw828@cornell.edu else if (wake_cmp == OS::TGT_FUTEX_OP_CMP_GE) 52813651Smw828@cornell.edu is_wake2 = oldval >= wake_cmparg; 52913651Smw828@cornell.edu // perform the second wake-up 53013651Smw828@cornell.edu if (is_wake2) 53113651Smw828@cornell.edu woken2 = futex_map.wakeup(uaddr2, process->tgid(), timeout); 53213651Smw828@cornell.edu 53313651Smw828@cornell.edu return woken1 + woken2; 5349112Smarc.orr@gmail.com } 53511911SBrandon.Potter@amd.com warn("futex: op %d not implemented; ignoring.", op); 53611911SBrandon.Potter@amd.com return -ENOSYS; 5379112Smarc.orr@gmail.com} 5389112Smarc.orr@gmail.com 5392238SN/A 5402238SN/A/// Pseudo Funcs - These functions use a different return convension, 5412238SN/A/// returning a second value in a register other than the normal return register 5422238SN/ASyscallReturn pipePseudoFunc(SyscallDesc *desc, int num, 54311851Sbrandon.potter@amd.com Process *process, ThreadContext *tc); 5442238SN/A 5452238SN/A/// Target getpidPseudo() handler. 5462238SN/ASyscallReturn getpidPseudoFunc(SyscallDesc *desc, int num, 54711851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 5482238SN/A 5492238SN/A/// Target getuidPseudo() handler. 5502238SN/ASyscallReturn getuidPseudoFunc(SyscallDesc *desc, int num, 55111851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 5522238SN/A 5532238SN/A/// Target getgidPseudo() handler. 5542238SN/ASyscallReturn getgidPseudoFunc(SyscallDesc *desc, int num, 55511851Sbrandon.potter@amd.com Process *p, ThreadContext *tc); 5562238SN/A 5572238SN/A 5581354SN/A/// A readable name for 1,000,000, for converting microseconds to seconds. 5591354SN/Aconst int one_million = 1000000; 56010796Sbrandon.potter@amd.com/// A readable name for 1,000,000,000, for converting nanoseconds to seconds. 56110796Sbrandon.potter@amd.comconst int one_billion = 1000000000; 5621354SN/A 5631354SN/A/// Approximate seconds since the epoch (1/1/1970). About a billion, 5641354SN/A/// by my reckoning. We want to keep this a constant (not use the 5651354SN/A/// real-world time) to keep simulations repeatable. 5661354SN/Aconst unsigned seconds_since_epoch = 1000000000; 5671354SN/A 5681354SN/A/// Helper function to convert current elapsed time to seconds and 5691354SN/A/// microseconds. 5701354SN/Atemplate <class T1, class T2> 5711354SN/Avoid 57210796Sbrandon.potter@amd.comgetElapsedTimeMicro(T1 &sec, T2 &usec) 5731354SN/A{ 57410796Sbrandon.potter@amd.com uint64_t elapsed_usecs = curTick() / SimClock::Int::us; 5751354SN/A sec = elapsed_usecs / one_million; 5761354SN/A usec = elapsed_usecs % one_million; 5771354SN/A} 5781354SN/A 57910796Sbrandon.potter@amd.com/// Helper function to convert current elapsed time to seconds and 58010796Sbrandon.potter@amd.com/// nanoseconds. 58110796Sbrandon.potter@amd.comtemplate <class T1, class T2> 58210796Sbrandon.potter@amd.comvoid 58310796Sbrandon.potter@amd.comgetElapsedTimeNano(T1 &sec, T2 &nsec) 58410796Sbrandon.potter@amd.com{ 58510796Sbrandon.potter@amd.com uint64_t elapsed_nsecs = curTick() / SimClock::Int::ns; 58610796Sbrandon.potter@amd.com sec = elapsed_nsecs / one_billion; 58710796Sbrandon.potter@amd.com nsec = elapsed_nsecs % one_billion; 58810796Sbrandon.potter@amd.com} 58910796Sbrandon.potter@amd.com 590360SN/A////////////////////////////////////////////////////////////////////// 591360SN/A// 592360SN/A// The following emulation functions are generic, but need to be 593360SN/A// templated to account for differences in types, constants, etc. 594360SN/A// 595360SN/A////////////////////////////////////////////////////////////////////// 596360SN/A 59711759Sbrandon.potter@amd.com typedef struct statfs hst_statfs; 5983113Sgblack@eecs.umich.edu#if NO_STAT64 5993113Sgblack@eecs.umich.edu typedef struct stat hst_stat; 6003113Sgblack@eecs.umich.edu typedef struct stat hst_stat64; 6013113Sgblack@eecs.umich.edu#else 6023113Sgblack@eecs.umich.edu typedef struct stat hst_stat; 6033113Sgblack@eecs.umich.edu typedef struct stat64 hst_stat64; 6043113Sgblack@eecs.umich.edu#endif 6053113Sgblack@eecs.umich.edu 6063113Sgblack@eecs.umich.edu//// Helper function to convert a host stat buffer to a target stat 6073113Sgblack@eecs.umich.edu//// buffer. Also copies the target buffer out to the simulated 6083113Sgblack@eecs.umich.edu//// memory space. Used by stat(), fstat(), and lstat(). 6093113Sgblack@eecs.umich.edu 6103113Sgblack@eecs.umich.edutemplate <typename target_stat, typename host_stat> 61112032Sandreas.sandberg@arm.comvoid 6123113Sgblack@eecs.umich.educonvertStatBuf(target_stat &tgt, host_stat *host, bool fakeTTY = false) 6133113Sgblack@eecs.umich.edu{ 6144189Sgblack@eecs.umich.edu using namespace TheISA; 6154189Sgblack@eecs.umich.edu 6163113Sgblack@eecs.umich.edu if (fakeTTY) 6173113Sgblack@eecs.umich.edu tgt->st_dev = 0xA; 6183113Sgblack@eecs.umich.edu else 6193113Sgblack@eecs.umich.edu tgt->st_dev = host->st_dev; 6208737Skoansin.tan@gmail.com tgt->st_dev = TheISA::htog(tgt->st_dev); 6213113Sgblack@eecs.umich.edu tgt->st_ino = host->st_ino; 6228737Skoansin.tan@gmail.com tgt->st_ino = TheISA::htog(tgt->st_ino); 6233277Sgblack@eecs.umich.edu tgt->st_mode = host->st_mode; 6245515SMichael.Adler@intel.com if (fakeTTY) { 6255515SMichael.Adler@intel.com // Claim to be a character device 6265515SMichael.Adler@intel.com tgt->st_mode &= ~S_IFMT; // Clear S_IFMT 6275515SMichael.Adler@intel.com tgt->st_mode |= S_IFCHR; // Set S_IFCHR 6285515SMichael.Adler@intel.com } 6298737Skoansin.tan@gmail.com tgt->st_mode = TheISA::htog(tgt->st_mode); 6303277Sgblack@eecs.umich.edu tgt->st_nlink = host->st_nlink; 6318737Skoansin.tan@gmail.com tgt->st_nlink = TheISA::htog(tgt->st_nlink); 6323277Sgblack@eecs.umich.edu tgt->st_uid = host->st_uid; 6338737Skoansin.tan@gmail.com tgt->st_uid = TheISA::htog(tgt->st_uid); 6343277Sgblack@eecs.umich.edu tgt->st_gid = host->st_gid; 6358737Skoansin.tan@gmail.com tgt->st_gid = TheISA::htog(tgt->st_gid); 6363113Sgblack@eecs.umich.edu if (fakeTTY) 6373113Sgblack@eecs.umich.edu tgt->st_rdev = 0x880d; 6383113Sgblack@eecs.umich.edu else 6393113Sgblack@eecs.umich.edu tgt->st_rdev = host->st_rdev; 6408737Skoansin.tan@gmail.com tgt->st_rdev = TheISA::htog(tgt->st_rdev); 6413113Sgblack@eecs.umich.edu tgt->st_size = host->st_size; 6428737Skoansin.tan@gmail.com tgt->st_size = TheISA::htog(tgt->st_size); 6433114Sgblack@eecs.umich.edu tgt->st_atimeX = host->st_atime; 6448737Skoansin.tan@gmail.com tgt->st_atimeX = TheISA::htog(tgt->st_atimeX); 6453114Sgblack@eecs.umich.edu tgt->st_mtimeX = host->st_mtime; 6468737Skoansin.tan@gmail.com tgt->st_mtimeX = TheISA::htog(tgt->st_mtimeX); 6473114Sgblack@eecs.umich.edu tgt->st_ctimeX = host->st_ctime; 6488737Skoansin.tan@gmail.com tgt->st_ctimeX = TheISA::htog(tgt->st_ctimeX); 64911906SBrandon.Potter@amd.com // Force the block size to be 8KB. This helps to ensure buffered io works 6504061Sgblack@eecs.umich.edu // consistently across different hosts. 6514061Sgblack@eecs.umich.edu tgt->st_blksize = 0x2000; 6528737Skoansin.tan@gmail.com tgt->st_blksize = TheISA::htog(tgt->st_blksize); 6533113Sgblack@eecs.umich.edu tgt->st_blocks = host->st_blocks; 6548737Skoansin.tan@gmail.com tgt->st_blocks = TheISA::htog(tgt->st_blocks); 6553113Sgblack@eecs.umich.edu} 6563113Sgblack@eecs.umich.edu 6573113Sgblack@eecs.umich.edu// Same for stat64 6583113Sgblack@eecs.umich.edu 6593113Sgblack@eecs.umich.edutemplate <typename target_stat, typename host_stat64> 66012032Sandreas.sandberg@arm.comvoid 6613113Sgblack@eecs.umich.educonvertStat64Buf(target_stat &tgt, host_stat64 *host, bool fakeTTY = false) 6623113Sgblack@eecs.umich.edu{ 6634189Sgblack@eecs.umich.edu using namespace TheISA; 6644189Sgblack@eecs.umich.edu 6653113Sgblack@eecs.umich.edu convertStatBuf<target_stat, host_stat64>(tgt, host, fakeTTY); 6663113Sgblack@eecs.umich.edu#if defined(STAT_HAVE_NSEC) 6673113Sgblack@eecs.umich.edu tgt->st_atime_nsec = host->st_atime_nsec; 6688737Skoansin.tan@gmail.com tgt->st_atime_nsec = TheISA::htog(tgt->st_atime_nsec); 6693113Sgblack@eecs.umich.edu tgt->st_mtime_nsec = host->st_mtime_nsec; 6708737Skoansin.tan@gmail.com tgt->st_mtime_nsec = TheISA::htog(tgt->st_mtime_nsec); 6713113Sgblack@eecs.umich.edu tgt->st_ctime_nsec = host->st_ctime_nsec; 6728737Skoansin.tan@gmail.com tgt->st_ctime_nsec = TheISA::htog(tgt->st_ctime_nsec); 6733113Sgblack@eecs.umich.edu#else 6743113Sgblack@eecs.umich.edu tgt->st_atime_nsec = 0; 6753113Sgblack@eecs.umich.edu tgt->st_mtime_nsec = 0; 6763113Sgblack@eecs.umich.edu tgt->st_ctime_nsec = 0; 6773113Sgblack@eecs.umich.edu#endif 6783113Sgblack@eecs.umich.edu} 6793113Sgblack@eecs.umich.edu 68011906SBrandon.Potter@amd.com// Here are a couple of convenience functions 6813113Sgblack@eecs.umich.edutemplate<class OS> 68212032Sandreas.sandberg@arm.comvoid 6838852Sandreas.hansson@arm.comcopyOutStatBuf(SETranslatingPortProxy &mem, Addr addr, 68411906SBrandon.Potter@amd.com hst_stat *host, bool fakeTTY = false) 6853113Sgblack@eecs.umich.edu{ 6863113Sgblack@eecs.umich.edu typedef TypedBufferArg<typename OS::tgt_stat> tgt_stat_buf; 6873113Sgblack@eecs.umich.edu tgt_stat_buf tgt(addr); 6883113Sgblack@eecs.umich.edu convertStatBuf<tgt_stat_buf, hst_stat>(tgt, host, fakeTTY); 6893113Sgblack@eecs.umich.edu tgt.copyOut(mem); 6903113Sgblack@eecs.umich.edu} 6913113Sgblack@eecs.umich.edu 6923113Sgblack@eecs.umich.edutemplate<class OS> 69312032Sandreas.sandberg@arm.comvoid 6948852Sandreas.hansson@arm.comcopyOutStat64Buf(SETranslatingPortProxy &mem, Addr addr, 69511906SBrandon.Potter@amd.com hst_stat64 *host, bool fakeTTY = false) 6963113Sgblack@eecs.umich.edu{ 6973113Sgblack@eecs.umich.edu typedef TypedBufferArg<typename OS::tgt_stat64> tgt_stat_buf; 6983113Sgblack@eecs.umich.edu tgt_stat_buf tgt(addr); 6996686Stjones1@inf.ed.ac.uk convertStat64Buf<tgt_stat_buf, hst_stat64>(tgt, host, fakeTTY); 7003113Sgblack@eecs.umich.edu tgt.copyOut(mem); 7013113Sgblack@eecs.umich.edu} 7023113Sgblack@eecs.umich.edu 70311759Sbrandon.potter@amd.comtemplate <class OS> 70412032Sandreas.sandberg@arm.comvoid 70511759Sbrandon.potter@amd.comcopyOutStatfsBuf(SETranslatingPortProxy &mem, Addr addr, 70611759Sbrandon.potter@amd.com hst_statfs *host) 70711759Sbrandon.potter@amd.com{ 70811759Sbrandon.potter@amd.com TypedBufferArg<typename OS::tgt_statfs> tgt(addr); 70911759Sbrandon.potter@amd.com 71011812Sbaz21@cam.ac.uk tgt->f_type = TheISA::htog(host->f_type); 71111812Sbaz21@cam.ac.uk#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) 71211812Sbaz21@cam.ac.uk tgt->f_bsize = TheISA::htog(host->f_iosize); 71311759Sbrandon.potter@amd.com#else 71411812Sbaz21@cam.ac.uk tgt->f_bsize = TheISA::htog(host->f_bsize); 71511759Sbrandon.potter@amd.com#endif 71611759Sbrandon.potter@amd.com tgt->f_blocks = TheISA::htog(host->f_blocks); 71711759Sbrandon.potter@amd.com tgt->f_bfree = TheISA::htog(host->f_bfree); 71811759Sbrandon.potter@amd.com tgt->f_bavail = TheISA::htog(host->f_bavail); 71911759Sbrandon.potter@amd.com tgt->f_files = TheISA::htog(host->f_files); 72011759Sbrandon.potter@amd.com tgt->f_ffree = TheISA::htog(host->f_ffree); 72111759Sbrandon.potter@amd.com memcpy(&tgt->f_fsid, &host->f_fsid, sizeof(host->f_fsid)); 72211812Sbaz21@cam.ac.uk#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) 72311812Sbaz21@cam.ac.uk tgt->f_namelen = TheISA::htog(host->f_namemax); 72411812Sbaz21@cam.ac.uk tgt->f_frsize = TheISA::htog(host->f_bsize); 72511812Sbaz21@cam.ac.uk#elif defined(__APPLE__) 72611812Sbaz21@cam.ac.uk tgt->f_namelen = 0; 72711812Sbaz21@cam.ac.uk tgt->f_frsize = 0; 72811812Sbaz21@cam.ac.uk#else 72911759Sbrandon.potter@amd.com tgt->f_namelen = TheISA::htog(host->f_namelen); 73011759Sbrandon.potter@amd.com tgt->f_frsize = TheISA::htog(host->f_frsize); 73111812Sbaz21@cam.ac.uk#endif 73211812Sbaz21@cam.ac.uk#if defined(__linux__) 73311759Sbrandon.potter@amd.com memcpy(&tgt->f_spare, &host->f_spare, sizeof(host->f_spare)); 73411812Sbaz21@cam.ac.uk#else 73511812Sbaz21@cam.ac.uk /* 73611812Sbaz21@cam.ac.uk * The fields are different sizes per OS. Don't bother with 73711812Sbaz21@cam.ac.uk * f_spare or f_reserved on non-Linux for now. 73811812Sbaz21@cam.ac.uk */ 73911812Sbaz21@cam.ac.uk memset(&tgt->f_spare, 0, sizeof(tgt->f_spare)); 74011812Sbaz21@cam.ac.uk#endif 74111759Sbrandon.potter@amd.com 74211759Sbrandon.potter@amd.com tgt.copyOut(mem); 74311759Sbrandon.potter@amd.com} 74411759Sbrandon.potter@amd.com 745378SN/A/// Target ioctl() handler. For the most part, programs call ioctl() 746378SN/A/// only to find out if their stdout is a tty, to determine whether to 7479141Smarc.orr@gmail.com/// do line or block buffering. We always claim that output fds are 7489141Smarc.orr@gmail.com/// not TTYs to provide repeatable results. 749360SN/Atemplate <class OS> 7501450SN/ASyscallReturn 75111856Sbrandon.potter@amd.comioctlFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 752360SN/A{ 7536701Sgblack@eecs.umich.edu int index = 0; 75411856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 75511856Sbrandon.potter@amd.com unsigned req = p->getSyscallArg(tc, index); 756360SN/A 75710930Sbrandon.potter@amd.com DPRINTF(SyscallVerbose, "ioctl(%d, 0x%x, ...)\n", tgt_fd, req); 758360SN/A 75911856Sbrandon.potter@amd.com if (OS::isTtyReq(req)) 76011856Sbrandon.potter@amd.com return -ENOTTY; 76110496Ssteve.reinhardt@amd.com 76211856Sbrandon.potter@amd.com auto dfdp = std::dynamic_pointer_cast<DeviceFDEntry>((*p->fds)[tgt_fd]); 76313902Sbrandon.potter@amd.com if (dfdp) { 76413902Sbrandon.potter@amd.com EmulatedDriver *emul_driver = dfdp->getDriver(); 76513902Sbrandon.potter@amd.com if (emul_driver) 76613902Sbrandon.potter@amd.com return emul_driver->ioctl(p, tc, req); 76713902Sbrandon.potter@amd.com } 76813902Sbrandon.potter@amd.com 76913902Sbrandon.potter@amd.com auto sfdp = std::dynamic_pointer_cast<SocketFDEntry>((*p->fds)[tgt_fd]); 77013902Sbrandon.potter@amd.com if (sfdp) { 77113902Sbrandon.potter@amd.com int status; 77213902Sbrandon.potter@amd.com 77313902Sbrandon.potter@amd.com switch (req) { 77413902Sbrandon.potter@amd.com case SIOCGIFCONF: { 77513902Sbrandon.potter@amd.com Addr conf_addr = p->getSyscallArg(tc, index); 77613902Sbrandon.potter@amd.com BufferArg conf_arg(conf_addr, sizeof(ifconf)); 77713902Sbrandon.potter@amd.com conf_arg.copyIn(tc->getMemProxy()); 77813902Sbrandon.potter@amd.com 77913902Sbrandon.potter@amd.com ifconf *conf = (ifconf*)conf_arg.bufferPtr(); 78013902Sbrandon.potter@amd.com Addr ifc_buf_addr = (Addr)conf->ifc_buf; 78113902Sbrandon.potter@amd.com BufferArg ifc_buf_arg(ifc_buf_addr, conf->ifc_len); 78213902Sbrandon.potter@amd.com ifc_buf_arg.copyIn(tc->getMemProxy()); 78313902Sbrandon.potter@amd.com 78413902Sbrandon.potter@amd.com conf->ifc_buf = (char*)ifc_buf_arg.bufferPtr(); 78513902Sbrandon.potter@amd.com 78613902Sbrandon.potter@amd.com status = ioctl(sfdp->getSimFD(), req, conf_arg.bufferPtr()); 78713902Sbrandon.potter@amd.com if (status != -1) { 78813902Sbrandon.potter@amd.com conf->ifc_buf = (char*)ifc_buf_addr; 78913902Sbrandon.potter@amd.com ifc_buf_arg.copyOut(tc->getMemProxy()); 79013902Sbrandon.potter@amd.com conf_arg.copyOut(tc->getMemProxy()); 79113902Sbrandon.potter@amd.com } 79213902Sbrandon.potter@amd.com 79313902Sbrandon.potter@amd.com return status; 79413902Sbrandon.potter@amd.com } 79513902Sbrandon.potter@amd.com case SIOCGIFFLAGS: 79613902Sbrandon.potter@amd.com#ifdef __linux__ 79713902Sbrandon.potter@amd.com case SIOCGIFINDEX: 79813902Sbrandon.potter@amd.com#endif 79913902Sbrandon.potter@amd.com case SIOCGIFNETMASK: 80013902Sbrandon.potter@amd.com case SIOCGIFADDR: 80113902Sbrandon.potter@amd.com#ifdef __linux__ 80213902Sbrandon.potter@amd.com case SIOCGIFHWADDR: 80313902Sbrandon.potter@amd.com#endif 80413902Sbrandon.potter@amd.com case SIOCGIFMTU: { 80513902Sbrandon.potter@amd.com Addr req_addr = p->getSyscallArg(tc, index); 80613902Sbrandon.potter@amd.com BufferArg req_arg(req_addr, sizeof(ifreq)); 80713902Sbrandon.potter@amd.com req_arg.copyIn(tc->getMemProxy()); 80813902Sbrandon.potter@amd.com 80913902Sbrandon.potter@amd.com status = ioctl(sfdp->getSimFD(), req, req_arg.bufferPtr()); 81013902Sbrandon.potter@amd.com if (status != -1) 81113902Sbrandon.potter@amd.com req_arg.copyOut(tc->getMemProxy()); 81213902Sbrandon.potter@amd.com return status; 81313902Sbrandon.potter@amd.com } 81413902Sbrandon.potter@amd.com } 81513902Sbrandon.potter@amd.com } 81610496Ssteve.reinhardt@amd.com 81711856Sbrandon.potter@amd.com /** 81811856Sbrandon.potter@amd.com * For lack of a better return code, return ENOTTY. Ideally, we should 81911856Sbrandon.potter@amd.com * return something better here, but at least we issue the warning. 82011856Sbrandon.potter@amd.com */ 82111856Sbrandon.potter@amd.com warn("Unsupported ioctl call (return ENOTTY): ioctl(%d, 0x%x, ...) @ \n", 82210930Sbrandon.potter@amd.com tgt_fd, req, tc->pcState()); 8239141Smarc.orr@gmail.com return -ENOTTY; 824360SN/A} 825360SN/A 826360SN/Atemplate <class OS> 82711907SBrandon.Potter@amd.comSyscallReturn 82811907SBrandon.Potter@amd.comopenImpl(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc, 82911907SBrandon.Potter@amd.com bool isopenat) 830360SN/A{ 83111907SBrandon.Potter@amd.com int index = 0; 83211907SBrandon.Potter@amd.com int tgt_dirfd = -1; 83311907SBrandon.Potter@amd.com 83411907SBrandon.Potter@amd.com /** 83511907SBrandon.Potter@amd.com * If using the openat variant, read in the target directory file 83611907SBrandon.Potter@amd.com * descriptor from the simulated process. 83711907SBrandon.Potter@amd.com */ 83811907SBrandon.Potter@amd.com if (isopenat) 83911907SBrandon.Potter@amd.com tgt_dirfd = p->getSyscallArg(tc, index); 84011907SBrandon.Potter@amd.com 84111907SBrandon.Potter@amd.com /** 84211907SBrandon.Potter@amd.com * Retrieve the simulated process' memory proxy and then read in the path 84311907SBrandon.Potter@amd.com * string from that memory space into the host's working memory space. 84411907SBrandon.Potter@amd.com */ 845360SN/A std::string path; 84611907SBrandon.Potter@amd.com if (!tc->getMemProxy().tryReadString(path, p->getSyscallArg(tc, index))) 8471458SN/A return -EFAULT; 848360SN/A 84911907SBrandon.Potter@amd.com#ifdef __CYGWIN32__ 85011907SBrandon.Potter@amd.com int host_flags = O_BINARY; 85111907SBrandon.Potter@amd.com#else 85211907SBrandon.Potter@amd.com int host_flags = 0; 85311907SBrandon.Potter@amd.com#endif 85411907SBrandon.Potter@amd.com /** 85511907SBrandon.Potter@amd.com * Translate target flags into host flags. Flags exist which are not 85611907SBrandon.Potter@amd.com * ported between architectures which can cause check failures. 85711907SBrandon.Potter@amd.com */ 85811907SBrandon.Potter@amd.com int tgt_flags = p->getSyscallArg(tc, index); 859360SN/A for (int i = 0; i < OS::NUM_OPEN_FLAGS; i++) { 86011907SBrandon.Potter@amd.com if (tgt_flags & OS::openFlagTable[i].tgtFlag) { 86111907SBrandon.Potter@amd.com tgt_flags &= ~OS::openFlagTable[i].tgtFlag; 86211907SBrandon.Potter@amd.com host_flags |= OS::openFlagTable[i].hostFlag; 863360SN/A } 864360SN/A } 86511907SBrandon.Potter@amd.com if (tgt_flags) { 86611907SBrandon.Potter@amd.com warn("open%s: cannot decode flags 0x%x", 86711907SBrandon.Potter@amd.com isopenat ? "at" : "", tgt_flags); 86811907SBrandon.Potter@amd.com } 869360SN/A#ifdef __CYGWIN32__ 87011907SBrandon.Potter@amd.com host_flags |= O_BINARY; 871360SN/A#endif 872360SN/A 87311907SBrandon.Potter@amd.com int mode = p->getSyscallArg(tc, index); 8743669Sbinkertn@umich.edu 87511907SBrandon.Potter@amd.com /** 87611907SBrandon.Potter@amd.com * If the simulated process called open or openat with AT_FDCWD specified, 87711907SBrandon.Potter@amd.com * take the current working directory value which was passed into the 87811907SBrandon.Potter@amd.com * process class as a Python parameter and append the current path to 87911907SBrandon.Potter@amd.com * create a full path. 88011907SBrandon.Potter@amd.com * Otherwise, openat with a valid target directory file descriptor has 88111907SBrandon.Potter@amd.com * been called. If the path option, which was passed in as a parameter, 88211907SBrandon.Potter@amd.com * is not absolute, retrieve the directory file descriptor's path and 88311907SBrandon.Potter@amd.com * prepend it to the path passed in as a parameter. 88411907SBrandon.Potter@amd.com * In every case, we should have a full path (which is relevant to the 88511907SBrandon.Potter@amd.com * host) to work with after this block has been passed. 88611907SBrandon.Potter@amd.com */ 88713883Sdavid.hashe@amd.com std::string redir_path = path; 88813883Sdavid.hashe@amd.com std::string abs_path = path; 88913883Sdavid.hashe@amd.com if (!isopenat || tgt_dirfd == OS::TGT_AT_FDCWD) { 89013883Sdavid.hashe@amd.com abs_path = p->absolutePath(path, true); 89113883Sdavid.hashe@amd.com redir_path = p->checkPathRedirect(path); 89211907SBrandon.Potter@amd.com } else if (!startswith(path, "/")) { 89311907SBrandon.Potter@amd.com std::shared_ptr<FDEntry> fdep = ((*p->fds)[tgt_dirfd]); 89411907SBrandon.Potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(fdep); 89511907SBrandon.Potter@amd.com if (!ffdp) 89611907SBrandon.Potter@amd.com return -EBADF; 89713883Sdavid.hashe@amd.com abs_path = ffdp->getFileName() + path; 89813883Sdavid.hashe@amd.com redir_path = p->checkPathRedirect(abs_path); 89911907SBrandon.Potter@amd.com } 9001706SN/A 90111907SBrandon.Potter@amd.com /** 90211907SBrandon.Potter@amd.com * Since this is an emulated environment, we create pseudo file 90311907SBrandon.Potter@amd.com * descriptors for device requests that have been registered with 90411907SBrandon.Potter@amd.com * the process class through Python; this allows us to create a file 90511907SBrandon.Potter@amd.com * descriptor for subsequent ioctl or mmap calls. 90611907SBrandon.Potter@amd.com */ 90713883Sdavid.hashe@amd.com if (startswith(abs_path, "/dev/")) { 90813883Sdavid.hashe@amd.com std::string filename = abs_path.substr(strlen("/dev/")); 90911907SBrandon.Potter@amd.com EmulatedDriver *drv = p->findDriver(filename); 91011907SBrandon.Potter@amd.com if (drv) { 91111907SBrandon.Potter@amd.com DPRINTF_SYSCALL(Verbose, "open%s: passing call to " 91211907SBrandon.Potter@amd.com "driver open with path[%s]\n", 91313883Sdavid.hashe@amd.com isopenat ? "at" : "", abs_path.c_str()); 91411907SBrandon.Potter@amd.com return drv->open(p, tc, mode, host_flags); 91510496Ssteve.reinhardt@amd.com } 91611907SBrandon.Potter@amd.com /** 91711907SBrandon.Potter@amd.com * Fall through here for pass through to host devices, such 91811907SBrandon.Potter@amd.com * as /dev/zero 91911907SBrandon.Potter@amd.com */ 92010496Ssteve.reinhardt@amd.com } 92110496Ssteve.reinhardt@amd.com 92211907SBrandon.Potter@amd.com /** 92313883Sdavid.hashe@amd.com * We make several attempts resolve a call to open. 92413883Sdavid.hashe@amd.com * 92513883Sdavid.hashe@amd.com * 1) Resolve any path redirection before hand. This will set the path 92613883Sdavid.hashe@amd.com * up with variable 'redir_path' which may contain a modified path or 92713883Sdavid.hashe@amd.com * the original path value. This should already be done in prior code. 92813883Sdavid.hashe@amd.com * 2) Try to handle the access using 'special_paths'. Some special_paths 92913883Sdavid.hashe@amd.com * and files cannot be called on the host and need to be handled as 93013883Sdavid.hashe@amd.com * special cases inside the simulator. These special_paths are handled by 93113883Sdavid.hashe@amd.com * C++ routines to provide output back to userspace. 93213883Sdavid.hashe@amd.com * 3) If the full path that was created above does not match any of the 93313883Sdavid.hashe@amd.com * special cases, pass it through to the open call on the __HOST__ to let 93413883Sdavid.hashe@amd.com * the host open the file on our behalf. Again, the openImpl tries to 93513883Sdavid.hashe@amd.com * USE_THE_HOST_FILESYSTEM_OPEN (with a possible redirection to the 93613883Sdavid.hashe@amd.com * faux-filesystem files). The faux-filesystem is dynamically created 93713883Sdavid.hashe@amd.com * during simulator configuration using Python functions. 93813883Sdavid.hashe@amd.com * 4) If the host cannot open the file, the open attempt failed in "3)". 93913883Sdavid.hashe@amd.com * Return the host's error code back through the system call to the 94013883Sdavid.hashe@amd.com * simulated process. If running a debug trace, also notify the user that 94113883Sdavid.hashe@amd.com * the open call failed. 94213883Sdavid.hashe@amd.com * 94313883Sdavid.hashe@amd.com * Any success will set sim_fd to something other than -1 and skip the 94413883Sdavid.hashe@amd.com * next conditions effectively bypassing them. 94511907SBrandon.Potter@amd.com */ 94611907SBrandon.Potter@amd.com int sim_fd = -1; 94713883Sdavid.hashe@amd.com std::string used_path; 94811907SBrandon.Potter@amd.com std::vector<std::string> special_paths = 94913883Sdavid.hashe@amd.com { "/proc/meminfo/", "/system/", "/sys/", "/platform/", 95013883Sdavid.hashe@amd.com "/etc/passwd" }; 95111907SBrandon.Potter@amd.com for (auto entry : special_paths) { 95213883Sdavid.hashe@amd.com if (startswith(path, entry)) { 95313883Sdavid.hashe@amd.com sim_fd = OS::openSpecialFile(abs_path, p, tc); 95413883Sdavid.hashe@amd.com used_path = abs_path; 95513883Sdavid.hashe@amd.com } 95611907SBrandon.Potter@amd.com } 95711907SBrandon.Potter@amd.com if (sim_fd == -1) { 95813883Sdavid.hashe@amd.com sim_fd = open(redir_path.c_str(), host_flags, mode); 95913883Sdavid.hashe@amd.com used_path = redir_path; 96011907SBrandon.Potter@amd.com } 96111907SBrandon.Potter@amd.com if (sim_fd == -1) { 96211907SBrandon.Potter@amd.com int local = -errno; 96313883Sdavid.hashe@amd.com DPRINTF_SYSCALL(Verbose, "open%s: failed -> path:%s " 96413883Sdavid.hashe@amd.com "(inferred from:%s)\n", isopenat ? "at" : "", 96513883Sdavid.hashe@amd.com used_path.c_str(), path.c_str()); 96611907SBrandon.Potter@amd.com return local; 96711907SBrandon.Potter@amd.com } 968360SN/A 96911907SBrandon.Potter@amd.com /** 97011907SBrandon.Potter@amd.com * The file was opened successfully and needs to be recorded in the 97111907SBrandon.Potter@amd.com * process' file descriptor array so that it can be retrieved later. 97211907SBrandon.Potter@amd.com * The target file descriptor that is chosen will be the lowest unused 97311907SBrandon.Potter@amd.com * file descriptor. 97411907SBrandon.Potter@amd.com * Return the indirect target file descriptor back to the simulated 97511907SBrandon.Potter@amd.com * process to act as a handle for the opened file. 97611907SBrandon.Potter@amd.com */ 97711907SBrandon.Potter@amd.com auto ffdp = std::make_shared<FileFDEntry>(sim_fd, host_flags, path, 0); 97811907SBrandon.Potter@amd.com int tgt_fd = p->fds->allocFD(ffdp); 97913883Sdavid.hashe@amd.com DPRINTF_SYSCALL(Verbose, "open%s: sim_fd[%d], target_fd[%d] -> path:%s\n" 98013883Sdavid.hashe@amd.com "(inferred from:%s)\n", isopenat ? "at" : "", 98113883Sdavid.hashe@amd.com sim_fd, tgt_fd, used_path.c_str(), path.c_str()); 98211907SBrandon.Potter@amd.com return tgt_fd; 983360SN/A} 984360SN/A 98510027SChris.Adeniyi-Jones@arm.com/// Target open() handler. 98610027SChris.Adeniyi-Jones@arm.comtemplate <class OS> 98710027SChris.Adeniyi-Jones@arm.comSyscallReturn 98811851Sbrandon.potter@amd.comopenFunc(SyscallDesc *desc, int callnum, Process *process, 98910027SChris.Adeniyi-Jones@arm.com ThreadContext *tc) 99010027SChris.Adeniyi-Jones@arm.com{ 99111907SBrandon.Potter@amd.com return openImpl<OS>(desc, callnum, process, tc, false); 99210027SChris.Adeniyi-Jones@arm.com} 99310027SChris.Adeniyi-Jones@arm.com 99410027SChris.Adeniyi-Jones@arm.com/// Target openat() handler. 99510027SChris.Adeniyi-Jones@arm.comtemplate <class OS> 99610027SChris.Adeniyi-Jones@arm.comSyscallReturn 99711851Sbrandon.potter@amd.comopenatFunc(SyscallDesc *desc, int callnum, Process *process, 99811851Sbrandon.potter@amd.com ThreadContext *tc) 99910027SChris.Adeniyi-Jones@arm.com{ 100011907SBrandon.Potter@amd.com return openImpl<OS>(desc, callnum, process, tc, true); 100110027SChris.Adeniyi-Jones@arm.com} 100210027SChris.Adeniyi-Jones@arm.com 100310633Smichaelupton@gmail.com/// Target unlinkat() handler. 100410633Smichaelupton@gmail.comtemplate <class OS> 100510633Smichaelupton@gmail.comSyscallReturn 100611851Sbrandon.potter@amd.comunlinkatFunc(SyscallDesc *desc, int callnum, Process *process, 100710633Smichaelupton@gmail.com ThreadContext *tc) 100810633Smichaelupton@gmail.com{ 100910633Smichaelupton@gmail.com int index = 0; 101010633Smichaelupton@gmail.com int dirfd = process->getSyscallArg(tc, index); 101110633Smichaelupton@gmail.com if (dirfd != OS::TGT_AT_FDCWD) 101210633Smichaelupton@gmail.com warn("unlinkat: first argument not AT_FDCWD; unlikely to work"); 101310633Smichaelupton@gmail.com 101410633Smichaelupton@gmail.com return unlinkHelper(desc, callnum, process, tc, 1); 101510633Smichaelupton@gmail.com} 101610633Smichaelupton@gmail.com 101710203SAli.Saidi@ARM.com/// Target facessat() handler 101810203SAli.Saidi@ARM.comtemplate <class OS> 101910203SAli.Saidi@ARM.comSyscallReturn 102011851Sbrandon.potter@amd.comfaccessatFunc(SyscallDesc *desc, int callnum, Process *process, 102111851Sbrandon.potter@amd.com ThreadContext *tc) 102210203SAli.Saidi@ARM.com{ 102310203SAli.Saidi@ARM.com int index = 0; 102410203SAli.Saidi@ARM.com int dirfd = process->getSyscallArg(tc, index); 102510203SAli.Saidi@ARM.com if (dirfd != OS::TGT_AT_FDCWD) 102610203SAli.Saidi@ARM.com warn("faccessat: first argument not AT_FDCWD; unlikely to work"); 102710203SAli.Saidi@ARM.com return accessFunc(desc, callnum, process, tc, 1); 102810203SAli.Saidi@ARM.com} 102910203SAli.Saidi@ARM.com 103010203SAli.Saidi@ARM.com/// Target readlinkat() handler 103110203SAli.Saidi@ARM.comtemplate <class OS> 103210203SAli.Saidi@ARM.comSyscallReturn 103311851Sbrandon.potter@amd.comreadlinkatFunc(SyscallDesc *desc, int callnum, Process *process, 103411851Sbrandon.potter@amd.com ThreadContext *tc) 103510203SAli.Saidi@ARM.com{ 103610203SAli.Saidi@ARM.com int index = 0; 103710203SAli.Saidi@ARM.com int dirfd = process->getSyscallArg(tc, index); 103810203SAli.Saidi@ARM.com if (dirfd != OS::TGT_AT_FDCWD) 103910203SAli.Saidi@ARM.com warn("openat: first argument not AT_FDCWD; unlikely to work"); 104010203SAli.Saidi@ARM.com return readlinkFunc(desc, callnum, process, tc, 1); 104110203SAli.Saidi@ARM.com} 104210203SAli.Saidi@ARM.com 104310850SGiacomo.Gabrielli@arm.com/// Target renameat() handler. 104410850SGiacomo.Gabrielli@arm.comtemplate <class OS> 104510850SGiacomo.Gabrielli@arm.comSyscallReturn 104611851Sbrandon.potter@amd.comrenameatFunc(SyscallDesc *desc, int callnum, Process *process, 104710850SGiacomo.Gabrielli@arm.com ThreadContext *tc) 104810850SGiacomo.Gabrielli@arm.com{ 104910850SGiacomo.Gabrielli@arm.com int index = 0; 105010850SGiacomo.Gabrielli@arm.com 105110850SGiacomo.Gabrielli@arm.com int olddirfd = process->getSyscallArg(tc, index); 105210850SGiacomo.Gabrielli@arm.com if (olddirfd != OS::TGT_AT_FDCWD) 105310850SGiacomo.Gabrielli@arm.com warn("renameat: first argument not AT_FDCWD; unlikely to work"); 105410850SGiacomo.Gabrielli@arm.com 105510850SGiacomo.Gabrielli@arm.com std::string old_name; 105610850SGiacomo.Gabrielli@arm.com 105710850SGiacomo.Gabrielli@arm.com if (!tc->getMemProxy().tryReadString(old_name, 105810850SGiacomo.Gabrielli@arm.com process->getSyscallArg(tc, index))) 105910850SGiacomo.Gabrielli@arm.com return -EFAULT; 106010850SGiacomo.Gabrielli@arm.com 106110850SGiacomo.Gabrielli@arm.com int newdirfd = process->getSyscallArg(tc, index); 106210850SGiacomo.Gabrielli@arm.com if (newdirfd != OS::TGT_AT_FDCWD) 106310850SGiacomo.Gabrielli@arm.com warn("renameat: third argument not AT_FDCWD; unlikely to work"); 106410850SGiacomo.Gabrielli@arm.com 106510850SGiacomo.Gabrielli@arm.com std::string new_name; 106610850SGiacomo.Gabrielli@arm.com 106710850SGiacomo.Gabrielli@arm.com if (!tc->getMemProxy().tryReadString(new_name, 106810850SGiacomo.Gabrielli@arm.com process->getSyscallArg(tc, index))) 106910850SGiacomo.Gabrielli@arm.com return -EFAULT; 107010850SGiacomo.Gabrielli@arm.com 107113883Sdavid.hashe@amd.com // Adjust path for cwd and redirection 107213883Sdavid.hashe@amd.com old_name = process->checkPathRedirect(old_name); 107313883Sdavid.hashe@amd.com new_name = process->checkPathRedirect(new_name); 107410850SGiacomo.Gabrielli@arm.com 107510850SGiacomo.Gabrielli@arm.com int result = rename(old_name.c_str(), new_name.c_str()); 107610850SGiacomo.Gabrielli@arm.com return (result == -1) ? -errno : result; 107710850SGiacomo.Gabrielli@arm.com} 107810850SGiacomo.Gabrielli@arm.com 10796640Svince@csl.cornell.edu/// Target sysinfo() handler. 10806640Svince@csl.cornell.edutemplate <class OS> 10816640Svince@csl.cornell.eduSyscallReturn 108211851Sbrandon.potter@amd.comsysinfoFunc(SyscallDesc *desc, int callnum, Process *process, 108311851Sbrandon.potter@amd.com ThreadContext *tc) 10846640Svince@csl.cornell.edu{ 10856640Svince@csl.cornell.edu 10866701Sgblack@eecs.umich.edu int index = 0; 10876701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::tgt_sysinfo> 108810793Sbrandon.potter@amd.com sysinfo(process->getSyscallArg(tc, index)); 10896640Svince@csl.cornell.edu 109011758Sbrandon.potter@amd.com sysinfo->uptime = seconds_since_epoch; 109111758Sbrandon.potter@amd.com sysinfo->totalram = process->system->memSize(); 109211758Sbrandon.potter@amd.com sysinfo->mem_unit = 1; 10936640Svince@csl.cornell.edu 10948706Sandreas.hansson@arm.com sysinfo.copyOut(tc->getMemProxy()); 10956640Svince@csl.cornell.edu 10966701Sgblack@eecs.umich.edu return 0; 10976640Svince@csl.cornell.edu} 1098360SN/A 10991999SN/A/// Target chmod() handler. 11001999SN/Atemplate <class OS> 11011999SN/ASyscallReturn 110211851Sbrandon.potter@amd.comchmodFunc(SyscallDesc *desc, int callnum, Process *process, 11032680Sktlim@umich.edu ThreadContext *tc) 11041999SN/A{ 11051999SN/A std::string path; 11061999SN/A 11076701Sgblack@eecs.umich.edu int index = 0; 11088852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 11096701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 11101999SN/A return -EFAULT; 11116701Sgblack@eecs.umich.edu } 11121999SN/A 11136701Sgblack@eecs.umich.edu uint32_t mode = process->getSyscallArg(tc, index); 11141999SN/A mode_t hostMode = 0; 11151999SN/A 11161999SN/A // XXX translate mode flags via OS::something??? 11171999SN/A hostMode = mode; 11181999SN/A 111913883Sdavid.hashe@amd.com // Adjust path for cwd and redirection 112013883Sdavid.hashe@amd.com path = process->checkPathRedirect(path); 11213669Sbinkertn@umich.edu 11221999SN/A // do the chmod 11231999SN/A int result = chmod(path.c_str(), hostMode); 11241999SN/A if (result < 0) 11252218SN/A return -errno; 11261999SN/A 11271999SN/A return 0; 11281999SN/A} 11291999SN/A 113013570Sbrandon.potter@amd.comtemplate <class OS> 113113570Sbrandon.potter@amd.comSyscallReturn 113213570Sbrandon.potter@amd.compollFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 113313570Sbrandon.potter@amd.com{ 113413570Sbrandon.potter@amd.com int index = 0; 113513570Sbrandon.potter@amd.com Addr fdsPtr = p->getSyscallArg(tc, index); 113613570Sbrandon.potter@amd.com int nfds = p->getSyscallArg(tc, index); 113713570Sbrandon.potter@amd.com int tmout = p->getSyscallArg(tc, index); 113813570Sbrandon.potter@amd.com 113913570Sbrandon.potter@amd.com BufferArg fdsBuf(fdsPtr, sizeof(struct pollfd) * nfds); 114013570Sbrandon.potter@amd.com fdsBuf.copyIn(tc->getMemProxy()); 114113570Sbrandon.potter@amd.com 114213570Sbrandon.potter@amd.com /** 114313570Sbrandon.potter@amd.com * Record the target file descriptors in a local variable. We need to 114413570Sbrandon.potter@amd.com * replace them with host file descriptors but we need a temporary copy 114513570Sbrandon.potter@amd.com * for later. Afterwards, replace each target file descriptor in the 114613570Sbrandon.potter@amd.com * poll_fd array with its host_fd. 114713570Sbrandon.potter@amd.com */ 114813570Sbrandon.potter@amd.com int temp_tgt_fds[nfds]; 114913570Sbrandon.potter@amd.com for (index = 0; index < nfds; index++) { 115013570Sbrandon.potter@amd.com temp_tgt_fds[index] = ((struct pollfd *)fdsBuf.bufferPtr())[index].fd; 115113570Sbrandon.potter@amd.com auto tgt_fd = temp_tgt_fds[index]; 115213570Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 115313570Sbrandon.potter@amd.com if (!hbfdp) 115413570Sbrandon.potter@amd.com return -EBADF; 115513570Sbrandon.potter@amd.com auto host_fd = hbfdp->getSimFD(); 115613570Sbrandon.potter@amd.com ((struct pollfd *)fdsBuf.bufferPtr())[index].fd = host_fd; 115713570Sbrandon.potter@amd.com } 115813570Sbrandon.potter@amd.com 115913570Sbrandon.potter@amd.com /** 116013570Sbrandon.potter@amd.com * We cannot allow an infinite poll to occur or it will inevitably cause 116113570Sbrandon.potter@amd.com * a deadlock in the gem5 simulator with clone. We must pass in tmout with 116213570Sbrandon.potter@amd.com * a non-negative value, however it also makes no sense to poll on the 116313570Sbrandon.potter@amd.com * underlying host for any other time than tmout a zero timeout. 116413570Sbrandon.potter@amd.com */ 116513570Sbrandon.potter@amd.com int status; 116613570Sbrandon.potter@amd.com if (tmout < 0) { 116713570Sbrandon.potter@amd.com status = poll((struct pollfd *)fdsBuf.bufferPtr(), nfds, 0); 116813570Sbrandon.potter@amd.com if (status == 0) { 116913570Sbrandon.potter@amd.com /** 117013570Sbrandon.potter@amd.com * If blocking indefinitely, check the signal list to see if a 117113570Sbrandon.potter@amd.com * signal would break the poll out of the retry cycle and try 117213570Sbrandon.potter@amd.com * to return the signal interrupt instead. 117313570Sbrandon.potter@amd.com */ 117413570Sbrandon.potter@amd.com System *sysh = tc->getSystemPtr(); 117513570Sbrandon.potter@amd.com std::list<BasicSignal>::iterator it; 117613570Sbrandon.potter@amd.com for (it=sysh->signalList.begin(); it!=sysh->signalList.end(); it++) 117713570Sbrandon.potter@amd.com if (it->receiver == p) 117813570Sbrandon.potter@amd.com return -EINTR; 117913570Sbrandon.potter@amd.com return SyscallReturn::retry(); 118013570Sbrandon.potter@amd.com } 118113570Sbrandon.potter@amd.com } else 118213570Sbrandon.potter@amd.com status = poll((struct pollfd *)fdsBuf.bufferPtr(), nfds, 0); 118313570Sbrandon.potter@amd.com 118413570Sbrandon.potter@amd.com if (status == -1) 118513570Sbrandon.potter@amd.com return -errno; 118613570Sbrandon.potter@amd.com 118713570Sbrandon.potter@amd.com /** 118813570Sbrandon.potter@amd.com * Replace each host_fd in the returned poll_fd array with its original 118913570Sbrandon.potter@amd.com * target file descriptor. 119013570Sbrandon.potter@amd.com */ 119113570Sbrandon.potter@amd.com for (index = 0; index < nfds; index++) { 119213570Sbrandon.potter@amd.com auto tgt_fd = temp_tgt_fds[index]; 119313570Sbrandon.potter@amd.com ((struct pollfd *)fdsBuf.bufferPtr())[index].fd = tgt_fd; 119413570Sbrandon.potter@amd.com } 119513570Sbrandon.potter@amd.com 119613570Sbrandon.potter@amd.com /** 119713570Sbrandon.potter@amd.com * Copy out the pollfd struct because the host may have updated fields 119813570Sbrandon.potter@amd.com * in the structure. 119913570Sbrandon.potter@amd.com */ 120013570Sbrandon.potter@amd.com fdsBuf.copyOut(tc->getMemProxy()); 120113570Sbrandon.potter@amd.com 120213570Sbrandon.potter@amd.com return status; 120313570Sbrandon.potter@amd.com} 12041999SN/A 12051999SN/A/// Target fchmod() handler. 12061999SN/Atemplate <class OS> 12071999SN/ASyscallReturn 120811856Sbrandon.potter@amd.comfchmodFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 12091999SN/A{ 12106701Sgblack@eecs.umich.edu int index = 0; 121111856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 121211856Sbrandon.potter@amd.com uint32_t mode = p->getSyscallArg(tc, index); 121310931Sbrandon.potter@amd.com 121411856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 121511856Sbrandon.potter@amd.com if (!ffdp) 12161999SN/A return -EBADF; 121711856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 12181999SN/A 121911856Sbrandon.potter@amd.com mode_t hostMode = mode; 12201999SN/A 122111856Sbrandon.potter@amd.com int result = fchmod(sim_fd, hostMode); 12221999SN/A 122311856Sbrandon.potter@amd.com return (result < 0) ? -errno : 0; 12241999SN/A} 12251999SN/A 12265877Shsul@eecs.umich.edu/// Target mremap() handler. 12275877Shsul@eecs.umich.edutemplate <class OS> 12285877Shsul@eecs.umich.eduSyscallReturn 122911851Sbrandon.potter@amd.commremapFunc(SyscallDesc *desc, int callnum, Process *process, ThreadContext *tc) 12305877Shsul@eecs.umich.edu{ 12316701Sgblack@eecs.umich.edu int index = 0; 12326701Sgblack@eecs.umich.edu Addr start = process->getSyscallArg(tc, index); 12336701Sgblack@eecs.umich.edu uint64_t old_length = process->getSyscallArg(tc, index); 12346701Sgblack@eecs.umich.edu uint64_t new_length = process->getSyscallArg(tc, index); 12356701Sgblack@eecs.umich.edu uint64_t flags = process->getSyscallArg(tc, index); 123610027SChris.Adeniyi-Jones@arm.com uint64_t provided_address = 0; 123710027SChris.Adeniyi-Jones@arm.com bool use_provided_address = flags & OS::TGT_MREMAP_FIXED; 123810027SChris.Adeniyi-Jones@arm.com 123910027SChris.Adeniyi-Jones@arm.com if (use_provided_address) 124010027SChris.Adeniyi-Jones@arm.com provided_address = process->getSyscallArg(tc, index); 12415877Shsul@eecs.umich.edu 124210318Sandreas.hansson@arm.com if ((start % TheISA::PageBytes != 0) || 124310318Sandreas.hansson@arm.com (provided_address % TheISA::PageBytes != 0)) { 12445877Shsul@eecs.umich.edu warn("mremap failing: arguments not page aligned"); 12455877Shsul@eecs.umich.edu return -EINVAL; 12465877Shsul@eecs.umich.edu } 12475877Shsul@eecs.umich.edu 124810486Stjablin@gmail.com new_length = roundUp(new_length, TheISA::PageBytes); 124910486Stjablin@gmail.com 12505877Shsul@eecs.umich.edu if (new_length > old_length) { 125111905SBrandon.Potter@amd.com std::shared_ptr<MemState> mem_state = process->memState; 125211905SBrandon.Potter@amd.com Addr mmap_end = mem_state->getMmapEnd(); 125311905SBrandon.Potter@amd.com 125411905SBrandon.Potter@amd.com if ((start + old_length) == mmap_end && 125510027SChris.Adeniyi-Jones@arm.com (!use_provided_address || provided_address == start)) { 125612206Srico.amslinger@informatik.uni-augsburg.de // This case cannot occur when growing downward, as 125712206Srico.amslinger@informatik.uni-augsburg.de // start is greater than or equal to mmap_end. 12585877Shsul@eecs.umich.edu uint64_t diff = new_length - old_length; 125911905SBrandon.Potter@amd.com process->allocateMem(mmap_end, diff); 126011905SBrandon.Potter@amd.com mem_state->setMmapEnd(mmap_end + diff); 12615877Shsul@eecs.umich.edu return start; 12625877Shsul@eecs.umich.edu } else { 126310027SChris.Adeniyi-Jones@arm.com if (!use_provided_address && !(flags & OS::TGT_MREMAP_MAYMOVE)) { 12645877Shsul@eecs.umich.edu warn("can't remap here and MREMAP_MAYMOVE flag not set\n"); 12655877Shsul@eecs.umich.edu return -ENOMEM; 12665877Shsul@eecs.umich.edu } else { 126712206Srico.amslinger@informatik.uni-augsburg.de uint64_t new_start = provided_address; 126812206Srico.amslinger@informatik.uni-augsburg.de if (!use_provided_address) { 126912206Srico.amslinger@informatik.uni-augsburg.de new_start = process->mmapGrowsDown() ? 127012206Srico.amslinger@informatik.uni-augsburg.de mmap_end - new_length : mmap_end; 127112206Srico.amslinger@informatik.uni-augsburg.de mmap_end = process->mmapGrowsDown() ? 127212206Srico.amslinger@informatik.uni-augsburg.de new_start : mmap_end + new_length; 127312206Srico.amslinger@informatik.uni-augsburg.de mem_state->setMmapEnd(mmap_end); 127412206Srico.amslinger@informatik.uni-augsburg.de } 127512206Srico.amslinger@informatik.uni-augsburg.de 127610027SChris.Adeniyi-Jones@arm.com process->pTable->remap(start, old_length, new_start); 127710027SChris.Adeniyi-Jones@arm.com warn("mremapping to new vaddr %08p-%08p, adding %d\n", 127810027SChris.Adeniyi-Jones@arm.com new_start, new_start + new_length, 127910027SChris.Adeniyi-Jones@arm.com new_length - old_length); 12805877Shsul@eecs.umich.edu // add on the remaining unallocated pages 128110027SChris.Adeniyi-Jones@arm.com process->allocateMem(new_start + old_length, 128210027SChris.Adeniyi-Jones@arm.com new_length - old_length, 128310027SChris.Adeniyi-Jones@arm.com use_provided_address /* clobber */); 128410027SChris.Adeniyi-Jones@arm.com if (use_provided_address && 128512206Srico.amslinger@informatik.uni-augsburg.de ((new_start + new_length > mem_state->getMmapEnd() && 128612206Srico.amslinger@informatik.uni-augsburg.de !process->mmapGrowsDown()) || 128712206Srico.amslinger@informatik.uni-augsburg.de (new_start < mem_state->getMmapEnd() && 128812206Srico.amslinger@informatik.uni-augsburg.de process->mmapGrowsDown()))) { 128910027SChris.Adeniyi-Jones@arm.com // something fishy going on here, at least notify the user 129010027SChris.Adeniyi-Jones@arm.com // @todo: increase mmap_end? 129110027SChris.Adeniyi-Jones@arm.com warn("mmap region limit exceeded with MREMAP_FIXED\n"); 129210027SChris.Adeniyi-Jones@arm.com } 129310027SChris.Adeniyi-Jones@arm.com warn("returning %08p as start\n", new_start); 129410027SChris.Adeniyi-Jones@arm.com return new_start; 12955877Shsul@eecs.umich.edu } 12965877Shsul@eecs.umich.edu } 12975877Shsul@eecs.umich.edu } else { 129810027SChris.Adeniyi-Jones@arm.com if (use_provided_address && provided_address != start) 129910027SChris.Adeniyi-Jones@arm.com process->pTable->remap(start, new_length, provided_address); 13008601Ssteve.reinhardt@amd.com process->pTable->unmap(start + new_length, old_length - new_length); 130110027SChris.Adeniyi-Jones@arm.com return use_provided_address ? provided_address : start; 13025877Shsul@eecs.umich.edu } 13035877Shsul@eecs.umich.edu} 13041999SN/A 1305378SN/A/// Target stat() handler. 1306360SN/Atemplate <class OS> 13071450SN/ASyscallReturn 130811851Sbrandon.potter@amd.comstatFunc(SyscallDesc *desc, int callnum, Process *process, 13092680Sktlim@umich.edu ThreadContext *tc) 1310360SN/A{ 1311360SN/A std::string path; 1312360SN/A 13136701Sgblack@eecs.umich.edu int index = 0; 13148852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 13156701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 13166701Sgblack@eecs.umich.edu return -EFAULT; 13176701Sgblack@eecs.umich.edu } 13186701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 1319360SN/A 132013883Sdavid.hashe@amd.com // Adjust path for cwd and redirection 132113883Sdavid.hashe@amd.com path = process->checkPathRedirect(path); 13223669Sbinkertn@umich.edu 1323360SN/A struct stat hostBuf; 1324360SN/A int result = stat(path.c_str(), &hostBuf); 1325360SN/A 1326360SN/A if (result < 0) 13272218SN/A return -errno; 1328360SN/A 13298706Sandreas.hansson@arm.com copyOutStatBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 1330360SN/A 13311458SN/A return 0; 1332360SN/A} 1333360SN/A 1334360SN/A 13355074Ssaidi@eecs.umich.edu/// Target stat64() handler. 13365074Ssaidi@eecs.umich.edutemplate <class OS> 13375074Ssaidi@eecs.umich.eduSyscallReturn 133811851Sbrandon.potter@amd.comstat64Func(SyscallDesc *desc, int callnum, Process *process, 13395074Ssaidi@eecs.umich.edu ThreadContext *tc) 13405074Ssaidi@eecs.umich.edu{ 13415074Ssaidi@eecs.umich.edu std::string path; 13425074Ssaidi@eecs.umich.edu 13436701Sgblack@eecs.umich.edu int index = 0; 13448852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 13456701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) 13465074Ssaidi@eecs.umich.edu return -EFAULT; 13476701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 13485074Ssaidi@eecs.umich.edu 134913883Sdavid.hashe@amd.com // Adjust path for cwd and redirection 135013883Sdavid.hashe@amd.com path = process->checkPathRedirect(path); 13515074Ssaidi@eecs.umich.edu 13525208Ssaidi@eecs.umich.edu#if NO_STAT64 13535208Ssaidi@eecs.umich.edu struct stat hostBuf; 13545208Ssaidi@eecs.umich.edu int result = stat(path.c_str(), &hostBuf); 13555208Ssaidi@eecs.umich.edu#else 13565074Ssaidi@eecs.umich.edu struct stat64 hostBuf; 13575074Ssaidi@eecs.umich.edu int result = stat64(path.c_str(), &hostBuf); 13585208Ssaidi@eecs.umich.edu#endif 13595074Ssaidi@eecs.umich.edu 13605074Ssaidi@eecs.umich.edu if (result < 0) 13615074Ssaidi@eecs.umich.edu return -errno; 13625074Ssaidi@eecs.umich.edu 13638706Sandreas.hansson@arm.com copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 13645074Ssaidi@eecs.umich.edu 13655074Ssaidi@eecs.umich.edu return 0; 13665074Ssaidi@eecs.umich.edu} 13675074Ssaidi@eecs.umich.edu 13685074Ssaidi@eecs.umich.edu 136910027SChris.Adeniyi-Jones@arm.com/// Target fstatat64() handler. 137010027SChris.Adeniyi-Jones@arm.comtemplate <class OS> 137110027SChris.Adeniyi-Jones@arm.comSyscallReturn 137211851Sbrandon.potter@amd.comfstatat64Func(SyscallDesc *desc, int callnum, Process *process, 137310027SChris.Adeniyi-Jones@arm.com ThreadContext *tc) 137410027SChris.Adeniyi-Jones@arm.com{ 137510027SChris.Adeniyi-Jones@arm.com int index = 0; 137610027SChris.Adeniyi-Jones@arm.com int dirfd = process->getSyscallArg(tc, index); 137710027SChris.Adeniyi-Jones@arm.com if (dirfd != OS::TGT_AT_FDCWD) 137810793Sbrandon.potter@amd.com warn("fstatat64: first argument not AT_FDCWD; unlikely to work"); 137910027SChris.Adeniyi-Jones@arm.com 138010027SChris.Adeniyi-Jones@arm.com std::string path; 138110027SChris.Adeniyi-Jones@arm.com if (!tc->getMemProxy().tryReadString(path, 138210027SChris.Adeniyi-Jones@arm.com process->getSyscallArg(tc, index))) 138310027SChris.Adeniyi-Jones@arm.com return -EFAULT; 138410027SChris.Adeniyi-Jones@arm.com Addr bufPtr = process->getSyscallArg(tc, index); 138510027SChris.Adeniyi-Jones@arm.com 138613883Sdavid.hashe@amd.com // Adjust path for cwd and redirection 138713883Sdavid.hashe@amd.com path = process->checkPathRedirect(path); 138810027SChris.Adeniyi-Jones@arm.com 138910027SChris.Adeniyi-Jones@arm.com#if NO_STAT64 139010027SChris.Adeniyi-Jones@arm.com struct stat hostBuf; 139110027SChris.Adeniyi-Jones@arm.com int result = stat(path.c_str(), &hostBuf); 139210027SChris.Adeniyi-Jones@arm.com#else 139310027SChris.Adeniyi-Jones@arm.com struct stat64 hostBuf; 139410027SChris.Adeniyi-Jones@arm.com int result = stat64(path.c_str(), &hostBuf); 139510027SChris.Adeniyi-Jones@arm.com#endif 139610027SChris.Adeniyi-Jones@arm.com 139710027SChris.Adeniyi-Jones@arm.com if (result < 0) 139810027SChris.Adeniyi-Jones@arm.com return -errno; 139910027SChris.Adeniyi-Jones@arm.com 140010027SChris.Adeniyi-Jones@arm.com copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 140110027SChris.Adeniyi-Jones@arm.com 140210027SChris.Adeniyi-Jones@arm.com return 0; 140310027SChris.Adeniyi-Jones@arm.com} 140410027SChris.Adeniyi-Jones@arm.com 140510027SChris.Adeniyi-Jones@arm.com 14061999SN/A/// Target fstat64() handler. 14071999SN/Atemplate <class OS> 14081999SN/ASyscallReturn 140911856Sbrandon.potter@amd.comfstat64Func(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 14101999SN/A{ 14116701Sgblack@eecs.umich.edu int index = 0; 141211856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 141311856Sbrandon.potter@amd.com Addr bufPtr = p->getSyscallArg(tc, index); 141410931Sbrandon.potter@amd.com 141511856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 141611856Sbrandon.potter@amd.com if (!ffdp) 14171999SN/A return -EBADF; 141811856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 14191999SN/A 14202764Sstever@eecs.umich.edu#if NO_STAT64 14212064SN/A struct stat hostBuf; 142210931Sbrandon.potter@amd.com int result = fstat(sim_fd, &hostBuf); 14232064SN/A#else 14242064SN/A struct stat64 hostBuf; 142510931Sbrandon.potter@amd.com int result = fstat64(sim_fd, &hostBuf); 14262064SN/A#endif 14271999SN/A 14281999SN/A if (result < 0) 14292218SN/A return -errno; 14301999SN/A 143110931Sbrandon.potter@amd.com copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf, (sim_fd == 1)); 14321999SN/A 14331999SN/A return 0; 14341999SN/A} 14351999SN/A 14361999SN/A 1437378SN/A/// Target lstat() handler. 1438360SN/Atemplate <class OS> 14391450SN/ASyscallReturn 144011851Sbrandon.potter@amd.comlstatFunc(SyscallDesc *desc, int callnum, Process *process, 14412680Sktlim@umich.edu ThreadContext *tc) 1442360SN/A{ 1443360SN/A std::string path; 1444360SN/A 14456701Sgblack@eecs.umich.edu int index = 0; 14468852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 14476701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 14486701Sgblack@eecs.umich.edu return -EFAULT; 14496701Sgblack@eecs.umich.edu } 14506701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 1451360SN/A 145213883Sdavid.hashe@amd.com // Adjust path for cwd and redirection 145313883Sdavid.hashe@amd.com path = process->checkPathRedirect(path); 14543669Sbinkertn@umich.edu 1455360SN/A struct stat hostBuf; 1456360SN/A int result = lstat(path.c_str(), &hostBuf); 1457360SN/A 1458360SN/A if (result < 0) 14591458SN/A return -errno; 1460360SN/A 14618706Sandreas.hansson@arm.com copyOutStatBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 1462360SN/A 14631458SN/A return 0; 1464360SN/A} 1465360SN/A 14661999SN/A/// Target lstat64() handler. 14671999SN/Atemplate <class OS> 14681999SN/ASyscallReturn 146911851Sbrandon.potter@amd.comlstat64Func(SyscallDesc *desc, int callnum, Process *process, 14702680Sktlim@umich.edu ThreadContext *tc) 14711999SN/A{ 14721999SN/A std::string path; 14731999SN/A 14746701Sgblack@eecs.umich.edu int index = 0; 14758852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 14766701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 14776701Sgblack@eecs.umich.edu return -EFAULT; 14786701Sgblack@eecs.umich.edu } 14796701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 14801999SN/A 148113883Sdavid.hashe@amd.com // Adjust path for cwd and redirection 148213883Sdavid.hashe@amd.com path = process->checkPathRedirect(path); 14833669Sbinkertn@umich.edu 14842764Sstever@eecs.umich.edu#if NO_STAT64 14852064SN/A struct stat hostBuf; 14862064SN/A int result = lstat(path.c_str(), &hostBuf); 14872064SN/A#else 14881999SN/A struct stat64 hostBuf; 14891999SN/A int result = lstat64(path.c_str(), &hostBuf); 14902064SN/A#endif 14911999SN/A 14921999SN/A if (result < 0) 14931999SN/A return -errno; 14941999SN/A 14958706Sandreas.hansson@arm.com copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 14961999SN/A 14971999SN/A return 0; 14981999SN/A} 14991999SN/A 1500378SN/A/// Target fstat() handler. 1501360SN/Atemplate <class OS> 15021450SN/ASyscallReturn 150311856Sbrandon.potter@amd.comfstatFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 1504360SN/A{ 15056701Sgblack@eecs.umich.edu int index = 0; 150611856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 150711856Sbrandon.potter@amd.com Addr bufPtr = p->getSyscallArg(tc, index); 1508360SN/A 150911380Salexandru.dutu@amd.com DPRINTF_SYSCALL(Verbose, "fstat(%d, ...)\n", tgt_fd); 1510360SN/A 151111856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 151211856Sbrandon.potter@amd.com if (!ffdp) 15131458SN/A return -EBADF; 151411856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 1515360SN/A 1516360SN/A struct stat hostBuf; 151710931Sbrandon.potter@amd.com int result = fstat(sim_fd, &hostBuf); 1518360SN/A 1519360SN/A if (result < 0) 15201458SN/A return -errno; 1521360SN/A 152210931Sbrandon.potter@amd.com copyOutStatBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf, (sim_fd == 1)); 15232021SN/A 15241458SN/A return 0; 1525360SN/A} 1526360SN/A 15271706SN/A/// Target statfs() handler. 15281706SN/Atemplate <class OS> 15291706SN/ASyscallReturn 153011851Sbrandon.potter@amd.comstatfsFunc(SyscallDesc *desc, int callnum, Process *process, 15312680Sktlim@umich.edu ThreadContext *tc) 15321706SN/A{ 153311799Sbrandon.potter@amd.com#if NO_STATFS 153411799Sbrandon.potter@amd.com warn("Host OS cannot support calls to statfs. Ignoring syscall"); 153511799Sbrandon.potter@amd.com#else 15361706SN/A std::string path; 15371706SN/A 15386701Sgblack@eecs.umich.edu int index = 0; 15398852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 15406701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 15416701Sgblack@eecs.umich.edu return -EFAULT; 15426701Sgblack@eecs.umich.edu } 15436701Sgblack@eecs.umich.edu Addr bufPtr = process->getSyscallArg(tc, index); 15441706SN/A 154513883Sdavid.hashe@amd.com // Adjust path for cwd and redirection 154613883Sdavid.hashe@amd.com path = process->checkPathRedirect(path); 15473669Sbinkertn@umich.edu 15481706SN/A struct statfs hostBuf; 15491706SN/A int result = statfs(path.c_str(), &hostBuf); 15501706SN/A 15511706SN/A if (result < 0) 15522218SN/A return -errno; 15531706SN/A 155411759Sbrandon.potter@amd.com copyOutStatfsBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 155511799Sbrandon.potter@amd.com#endif 15561706SN/A return 0; 15571706SN/A} 15581706SN/A 155911886Sbrandon.potter@amd.comtemplate <class OS> 156011886Sbrandon.potter@amd.comSyscallReturn 156111886Sbrandon.potter@amd.comcloneFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 156211886Sbrandon.potter@amd.com{ 156311886Sbrandon.potter@amd.com int index = 0; 156412426Sqtt2@cornell.edu 156513557Sgabeblack@google.com RegVal flags = p->getSyscallArg(tc, index); 156613557Sgabeblack@google.com RegVal newStack = p->getSyscallArg(tc, index); 156711886Sbrandon.potter@amd.com Addr ptidPtr = p->getSyscallArg(tc, index); 156812426Sqtt2@cornell.edu 156913534Sandreas.sandberg@arm.com#if THE_ISA == RISCV_ISA or THE_ISA == ARM_ISA 157012426Sqtt2@cornell.edu /** 157113534Sandreas.sandberg@arm.com * Linux sets CLONE_BACKWARDS flag for RISC-V and Arm. 157212426Sqtt2@cornell.edu * The flag defines the list of clone() arguments in the following 157312426Sqtt2@cornell.edu * order: flags -> newStack -> ptidPtr -> tlsPtr -> ctidPtr 157412426Sqtt2@cornell.edu */ 157513536Sandreas.sandberg@arm.com Addr tlsPtr = p->getSyscallArg(tc, index); 157612426Sqtt2@cornell.edu Addr ctidPtr = p->getSyscallArg(tc, index); 157712426Sqtt2@cornell.edu#else 157811886Sbrandon.potter@amd.com Addr ctidPtr = p->getSyscallArg(tc, index); 157913536Sandreas.sandberg@arm.com Addr tlsPtr = p->getSyscallArg(tc, index); 158012426Sqtt2@cornell.edu#endif 158111886Sbrandon.potter@amd.com 158211886Sbrandon.potter@amd.com if (((flags & OS::TGT_CLONE_SIGHAND)&& !(flags & OS::TGT_CLONE_VM)) || 158311886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_THREAD) && !(flags & OS::TGT_CLONE_SIGHAND)) || 158411886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_FS) && (flags & OS::TGT_CLONE_NEWNS)) || 158511886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_NEWIPC) && (flags & OS::TGT_CLONE_SYSVSEM)) || 158611886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_NEWPID) && (flags & OS::TGT_CLONE_THREAD)) || 158711886Sbrandon.potter@amd.com ((flags & OS::TGT_CLONE_VM) && !(newStack))) 158811886Sbrandon.potter@amd.com return -EINVAL; 158911886Sbrandon.potter@amd.com 159011886Sbrandon.potter@amd.com ThreadContext *ctc; 159113649Sqtt2@cornell.edu if (!(ctc = p->findFreeContext())) { 159213649Sqtt2@cornell.edu DPRINTF_SYSCALL(Verbose, "clone: no spare thread context in system" 159313649Sqtt2@cornell.edu "[cpu %d, thread %d]", tc->cpuId(), tc->threadId()); 159413649Sqtt2@cornell.edu return -EAGAIN; 159513649Sqtt2@cornell.edu } 159611886Sbrandon.potter@amd.com 159711886Sbrandon.potter@amd.com /** 159811886Sbrandon.potter@amd.com * Note that ProcessParams is generated by swig and there are no other 159911886Sbrandon.potter@amd.com * examples of how to create anything but this default constructor. The 160011886Sbrandon.potter@amd.com * fields are manually initialized instead of passing parameters to the 160111886Sbrandon.potter@amd.com * constructor. 160211886Sbrandon.potter@amd.com */ 160311886Sbrandon.potter@amd.com ProcessParams *pp = new ProcessParams(); 160411886Sbrandon.potter@amd.com pp->executable.assign(*(new std::string(p->progName()))); 160511886Sbrandon.potter@amd.com pp->cmd.push_back(*(new std::string(p->progName()))); 160611886Sbrandon.potter@amd.com pp->system = p->system; 160713883Sdavid.hashe@amd.com pp->cwd.assign(p->tgtCwd); 160811886Sbrandon.potter@amd.com pp->input.assign("stdin"); 160911886Sbrandon.potter@amd.com pp->output.assign("stdout"); 161011886Sbrandon.potter@amd.com pp->errout.assign("stderr"); 161111886Sbrandon.potter@amd.com pp->uid = p->uid(); 161211886Sbrandon.potter@amd.com pp->euid = p->euid(); 161311886Sbrandon.potter@amd.com pp->gid = p->gid(); 161411886Sbrandon.potter@amd.com pp->egid = p->egid(); 161511886Sbrandon.potter@amd.com 161611886Sbrandon.potter@amd.com /* Find the first free PID that's less than the maximum */ 161711886Sbrandon.potter@amd.com std::set<int> const& pids = p->system->PIDs; 161811886Sbrandon.potter@amd.com int temp_pid = *pids.begin(); 161911886Sbrandon.potter@amd.com do { 162011886Sbrandon.potter@amd.com temp_pid++; 162111886Sbrandon.potter@amd.com } while (pids.find(temp_pid) != pids.end()); 162211886Sbrandon.potter@amd.com if (temp_pid >= System::maxPID) 162311886Sbrandon.potter@amd.com fatal("temp_pid is too large: %d", temp_pid); 162411886Sbrandon.potter@amd.com 162511886Sbrandon.potter@amd.com pp->pid = temp_pid; 162611886Sbrandon.potter@amd.com pp->ppid = (flags & OS::TGT_CLONE_THREAD) ? p->ppid() : p->pid(); 162713867Salexandru.dutu@amd.com pp->useArchPT = p->useArchPT; 162813867Salexandru.dutu@amd.com pp->kvmInSE = p->kvmInSE; 162911886Sbrandon.potter@amd.com Process *cp = pp->create(); 163011886Sbrandon.potter@amd.com delete pp; 163111886Sbrandon.potter@amd.com 163211886Sbrandon.potter@amd.com Process *owner = ctc->getProcessPtr(); 163311886Sbrandon.potter@amd.com ctc->setProcessPtr(cp); 163411886Sbrandon.potter@amd.com cp->assignThreadContext(ctc->contextId()); 163511886Sbrandon.potter@amd.com owner->revokeThreadContext(ctc->contextId()); 163611886Sbrandon.potter@amd.com 163711886Sbrandon.potter@amd.com if (flags & OS::TGT_CLONE_PARENT_SETTID) { 163811886Sbrandon.potter@amd.com BufferArg ptidBuf(ptidPtr, sizeof(long)); 163911886Sbrandon.potter@amd.com long *ptid = (long *)ptidBuf.bufferPtr(); 164011886Sbrandon.potter@amd.com *ptid = cp->pid(); 164111886Sbrandon.potter@amd.com ptidBuf.copyOut(tc->getMemProxy()); 164211886Sbrandon.potter@amd.com } 164311886Sbrandon.potter@amd.com 164413867Salexandru.dutu@amd.com if (flags & OS::TGT_CLONE_THREAD) { 164513867Salexandru.dutu@amd.com cp->pTable->shared = true; 164613867Salexandru.dutu@amd.com cp->useForClone = true; 164713867Salexandru.dutu@amd.com } 164811886Sbrandon.potter@amd.com cp->initState(); 164911886Sbrandon.potter@amd.com p->clone(tc, ctc, cp, flags); 165011886Sbrandon.potter@amd.com 165111911SBrandon.Potter@amd.com if (flags & OS::TGT_CLONE_THREAD) { 165211911SBrandon.Potter@amd.com delete cp->sigchld; 165311911SBrandon.Potter@amd.com cp->sigchld = p->sigchld; 165411911SBrandon.Potter@amd.com } else if (flags & OS::TGT_SIGCHLD) { 165511911SBrandon.Potter@amd.com *cp->sigchld = true; 165611911SBrandon.Potter@amd.com } 165711911SBrandon.Potter@amd.com 165811886Sbrandon.potter@amd.com if (flags & OS::TGT_CLONE_CHILD_SETTID) { 165911886Sbrandon.potter@amd.com BufferArg ctidBuf(ctidPtr, sizeof(long)); 166011886Sbrandon.potter@amd.com long *ctid = (long *)ctidBuf.bufferPtr(); 166111886Sbrandon.potter@amd.com *ctid = cp->pid(); 166211886Sbrandon.potter@amd.com ctidBuf.copyOut(ctc->getMemProxy()); 166311886Sbrandon.potter@amd.com } 166411886Sbrandon.potter@amd.com 166511886Sbrandon.potter@amd.com if (flags & OS::TGT_CLONE_CHILD_CLEARTID) 166611886Sbrandon.potter@amd.com cp->childClearTID = (uint64_t)ctidPtr; 166711886Sbrandon.potter@amd.com 166811886Sbrandon.potter@amd.com ctc->clearArchRegs(); 166911886Sbrandon.potter@amd.com 167013536Sandreas.sandberg@arm.com OS::archClone(flags, p, cp, tc, ctc, newStack, tlsPtr); 167111886Sbrandon.potter@amd.com 167211886Sbrandon.potter@amd.com cp->setSyscallReturn(ctc, 0); 167311886Sbrandon.potter@amd.com 167411886Sbrandon.potter@amd.com#if THE_ISA == ALPHA_ISA 167511886Sbrandon.potter@amd.com ctc->setIntReg(TheISA::SyscallSuccessReg, 0); 167611886Sbrandon.potter@amd.com#elif THE_ISA == SPARC_ISA 167711886Sbrandon.potter@amd.com tc->setIntReg(TheISA::SyscallPseudoReturnReg, 0); 167811886Sbrandon.potter@amd.com ctc->setIntReg(TheISA::SyscallPseudoReturnReg, 1); 167911886Sbrandon.potter@amd.com#endif 168011886Sbrandon.potter@amd.com 168113867Salexandru.dutu@amd.com if (p->kvmInSE) { 168213867Salexandru.dutu@amd.com#if THE_ISA == X86_ISA 168313867Salexandru.dutu@amd.com ctc->pcState(tc->readIntReg(TheISA::INTREG_RCX)); 168413867Salexandru.dutu@amd.com#else 168513867Salexandru.dutu@amd.com panic("KVM CPU model is not supported for this ISA"); 168613867Salexandru.dutu@amd.com#endif 168713867Salexandru.dutu@amd.com } else { 168813867Salexandru.dutu@amd.com TheISA::PCState cpc = tc->pcState(); 168913867Salexandru.dutu@amd.com cpc.advance(); 169013867Salexandru.dutu@amd.com ctc->pcState(cpc); 169113867Salexandru.dutu@amd.com } 169211886Sbrandon.potter@amd.com ctc->activate(); 169311886Sbrandon.potter@amd.com 169411886Sbrandon.potter@amd.com return cp->pid(); 169511886Sbrandon.potter@amd.com} 16961706SN/A 16971706SN/A/// Target fstatfs() handler. 16981706SN/Atemplate <class OS> 16991706SN/ASyscallReturn 170011856Sbrandon.potter@amd.comfstatfsFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 17011706SN/A{ 17026701Sgblack@eecs.umich.edu int index = 0; 170311856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 170411856Sbrandon.potter@amd.com Addr bufPtr = p->getSyscallArg(tc, index); 17051706SN/A 170611856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 170711856Sbrandon.potter@amd.com if (!ffdp) 17081706SN/A return -EBADF; 170911856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 17101706SN/A 17111706SN/A struct statfs hostBuf; 171210931Sbrandon.potter@amd.com int result = fstatfs(sim_fd, &hostBuf); 17131706SN/A 17141706SN/A if (result < 0) 17152218SN/A return -errno; 17161706SN/A 171711759Sbrandon.potter@amd.com copyOutStatfsBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 17181706SN/A 17191706SN/A return 0; 17201706SN/A} 17211706SN/A 172213572Sbrandon.potter@amd.com/// Target readv() handler. 172313572Sbrandon.potter@amd.comtemplate <class OS> 172413572Sbrandon.potter@amd.comSyscallReturn 172513572Sbrandon.potter@amd.comreadvFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 172613572Sbrandon.potter@amd.com{ 172713572Sbrandon.potter@amd.com int index = 0; 172813572Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 172913572Sbrandon.potter@amd.com 173013572Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 173113572Sbrandon.potter@amd.com if (!ffdp) 173213572Sbrandon.potter@amd.com return -EBADF; 173313572Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 173413572Sbrandon.potter@amd.com 173513572Sbrandon.potter@amd.com SETranslatingPortProxy &prox = tc->getMemProxy(); 173613572Sbrandon.potter@amd.com uint64_t tiov_base = p->getSyscallArg(tc, index); 173713572Sbrandon.potter@amd.com size_t count = p->getSyscallArg(tc, index); 173813572Sbrandon.potter@amd.com typename OS::tgt_iovec tiov[count]; 173913572Sbrandon.potter@amd.com struct iovec hiov[count]; 174013572Sbrandon.potter@amd.com for (size_t i = 0; i < count; ++i) { 174113572Sbrandon.potter@amd.com prox.readBlob(tiov_base + (i * sizeof(typename OS::tgt_iovec)), 174213572Sbrandon.potter@amd.com (uint8_t*)&tiov[i], sizeof(typename OS::tgt_iovec)); 174313572Sbrandon.potter@amd.com hiov[i].iov_len = TheISA::gtoh(tiov[i].iov_len); 174413572Sbrandon.potter@amd.com hiov[i].iov_base = new char [hiov[i].iov_len]; 174513572Sbrandon.potter@amd.com } 174613572Sbrandon.potter@amd.com 174713572Sbrandon.potter@amd.com int result = readv(sim_fd, hiov, count); 174813572Sbrandon.potter@amd.com int local_errno = errno; 174913572Sbrandon.potter@amd.com 175013572Sbrandon.potter@amd.com for (size_t i = 0; i < count; ++i) { 175113572Sbrandon.potter@amd.com if (result != -1) { 175213572Sbrandon.potter@amd.com prox.writeBlob(TheISA::htog(tiov[i].iov_base), 175313572Sbrandon.potter@amd.com (uint8_t*)hiov[i].iov_base, hiov[i].iov_len); 175413572Sbrandon.potter@amd.com } 175513572Sbrandon.potter@amd.com delete [] (char *)hiov[i].iov_base; 175613572Sbrandon.potter@amd.com } 175713572Sbrandon.potter@amd.com 175813572Sbrandon.potter@amd.com return (result == -1) ? -local_errno : result; 175913572Sbrandon.potter@amd.com} 17601706SN/A 17611999SN/A/// Target writev() handler. 17621999SN/Atemplate <class OS> 17631999SN/ASyscallReturn 176411856Sbrandon.potter@amd.comwritevFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 17651999SN/A{ 17666701Sgblack@eecs.umich.edu int index = 0; 176711856Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 176810931Sbrandon.potter@amd.com 176911856Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 177011856Sbrandon.potter@amd.com if (!hbfdp) 17711999SN/A return -EBADF; 177211856Sbrandon.potter@amd.com int sim_fd = hbfdp->getSimFD(); 17731999SN/A 177411856Sbrandon.potter@amd.com SETranslatingPortProxy &prox = tc->getMemProxy(); 177511856Sbrandon.potter@amd.com uint64_t tiov_base = p->getSyscallArg(tc, index); 177611856Sbrandon.potter@amd.com size_t count = p->getSyscallArg(tc, index); 17771999SN/A struct iovec hiov[count]; 17786227Snate@binkert.org for (size_t i = 0; i < count; ++i) { 17791999SN/A typename OS::tgt_iovec tiov; 17802461SN/A 178111856Sbrandon.potter@amd.com prox.readBlob(tiov_base + i*sizeof(typename OS::tgt_iovec), 178211856Sbrandon.potter@amd.com (uint8_t*)&tiov, sizeof(typename OS::tgt_iovec)); 17838737Skoansin.tan@gmail.com hiov[i].iov_len = TheISA::gtoh(tiov.iov_len); 17841999SN/A hiov[i].iov_base = new char [hiov[i].iov_len]; 178511856Sbrandon.potter@amd.com prox.readBlob(TheISA::gtoh(tiov.iov_base), (uint8_t *)hiov[i].iov_base, 178611856Sbrandon.potter@amd.com hiov[i].iov_len); 17871999SN/A } 17881999SN/A 178910931Sbrandon.potter@amd.com int result = writev(sim_fd, hiov, count); 17901999SN/A 17916227Snate@binkert.org for (size_t i = 0; i < count; ++i) 17921999SN/A delete [] (char *)hiov[i].iov_base; 17931999SN/A 179413572Sbrandon.potter@amd.com return (result == -1) ? -errno : result; 17951999SN/A} 17961999SN/A 179711385Sbrandon.potter@amd.com/// Real mmap handler. 1798360SN/Atemplate <class OS> 17991450SN/ASyscallReturn 180011851Sbrandon.potter@amd.commmapImpl(SyscallDesc *desc, int num, Process *p, ThreadContext *tc, 180111385Sbrandon.potter@amd.com bool is_mmap2) 1802360SN/A{ 18036701Sgblack@eecs.umich.edu int index = 0; 18046701Sgblack@eecs.umich.edu Addr start = p->getSyscallArg(tc, index); 18056701Sgblack@eecs.umich.edu uint64_t length = p->getSyscallArg(tc, index); 180611383Sbrandon.potter@amd.com int prot = p->getSyscallArg(tc, index); 180711383Sbrandon.potter@amd.com int tgt_flags = p->getSyscallArg(tc, index); 18088324Ssteve.reinhardt@amd.com int tgt_fd = p->getSyscallArg(tc, index); 180910486Stjablin@gmail.com int offset = p->getSyscallArg(tc, index); 1810360SN/A 181111385Sbrandon.potter@amd.com if (is_mmap2) 181211385Sbrandon.potter@amd.com offset *= TheISA::PageBytes; 18139008Sgblack@eecs.umich.edu 181411383Sbrandon.potter@amd.com if (start & (TheISA::PageBytes - 1) || 181511383Sbrandon.potter@amd.com offset & (TheISA::PageBytes - 1) || 181611383Sbrandon.potter@amd.com (tgt_flags & OS::TGT_MAP_PRIVATE && 181711383Sbrandon.potter@amd.com tgt_flags & OS::TGT_MAP_SHARED) || 181811383Sbrandon.potter@amd.com (!(tgt_flags & OS::TGT_MAP_PRIVATE) && 181911383Sbrandon.potter@amd.com !(tgt_flags & OS::TGT_MAP_SHARED)) || 182011383Sbrandon.potter@amd.com !length) { 182111383Sbrandon.potter@amd.com return -EINVAL; 182211383Sbrandon.potter@amd.com } 18238324Ssteve.reinhardt@amd.com 182411383Sbrandon.potter@amd.com if ((prot & PROT_WRITE) && (tgt_flags & OS::TGT_MAP_SHARED)) { 182511383Sbrandon.potter@amd.com // With shared mmaps, there are two cases to consider: 182611383Sbrandon.potter@amd.com // 1) anonymous: writes should modify the mapping and this should be 182711383Sbrandon.potter@amd.com // visible to observers who share the mapping. Currently, it's 182811383Sbrandon.potter@amd.com // difficult to update the shared mapping because there's no 182911383Sbrandon.potter@amd.com // structure which maintains information about the which virtual 183011383Sbrandon.potter@amd.com // memory areas are shared. If that structure existed, it would be 183111383Sbrandon.potter@amd.com // possible to make the translations point to the same frames. 183211383Sbrandon.potter@amd.com // 2) file-backed: writes should modify the mapping and the file 183311383Sbrandon.potter@amd.com // which is backed by the mapping. The shared mapping problem is the 183411383Sbrandon.potter@amd.com // same as what was mentioned about the anonymous mappings. For 183511383Sbrandon.potter@amd.com // file-backed mappings, the writes to the file are difficult 183611383Sbrandon.potter@amd.com // because it requires syncing what the mapping holds with the file 183711383Sbrandon.potter@amd.com // that resides on the host system. So, any write on a real system 183811383Sbrandon.potter@amd.com // would cause the change to be propagated to the file mapping at 183911383Sbrandon.potter@amd.com // some point in the future (the inode is tracked along with the 184011383Sbrandon.potter@amd.com // mapping). This isn't guaranteed to always happen, but it usually 184111383Sbrandon.potter@amd.com // works well enough. The guarantee is provided by the msync system 184211383Sbrandon.potter@amd.com // call. We could force the change through with shared mappings with 184311383Sbrandon.potter@amd.com // a call to msync, but that again would require more information 184411383Sbrandon.potter@amd.com // than we currently maintain. 184511383Sbrandon.potter@amd.com warn("mmap: writing to shared mmap region is currently " 184611383Sbrandon.potter@amd.com "unsupported. The write succeeds on the target, but it " 184711383Sbrandon.potter@amd.com "will not be propagated to the host or shared mappings"); 18488324Ssteve.reinhardt@amd.com } 18495877Shsul@eecs.umich.edu 185010486Stjablin@gmail.com length = roundUp(length, TheISA::PageBytes); 185110486Stjablin@gmail.com 185211383Sbrandon.potter@amd.com int sim_fd = -1; 185311383Sbrandon.potter@amd.com uint8_t *pmap = nullptr; 185411383Sbrandon.potter@amd.com if (!(tgt_flags & OS::TGT_MAP_ANONYMOUS)) { 185511856Sbrandon.potter@amd.com std::shared_ptr<FDEntry> fdep = (*p->fds)[tgt_fd]; 185611624Smichael.lebeane@amd.com 185711856Sbrandon.potter@amd.com auto dfdp = std::dynamic_pointer_cast<DeviceFDEntry>(fdep); 185811856Sbrandon.potter@amd.com if (dfdp) { 185911856Sbrandon.potter@amd.com EmulatedDriver *emul_driver = dfdp->getDriver(); 186011856Sbrandon.potter@amd.com return emul_driver->mmap(p, tc, start, length, prot, 186111624Smichael.lebeane@amd.com tgt_flags, tgt_fd, offset); 186211624Smichael.lebeane@amd.com } 186311624Smichael.lebeane@amd.com 186411856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(fdep); 186511856Sbrandon.potter@amd.com if (!ffdp) 186611383Sbrandon.potter@amd.com return -EBADF; 186711856Sbrandon.potter@amd.com sim_fd = ffdp->getSimFD(); 1868360SN/A 186911913SBrandon.Potter@amd.com pmap = (decltype(pmap))mmap(nullptr, length, PROT_READ, MAP_PRIVATE, 187011383Sbrandon.potter@amd.com sim_fd, offset); 18718600Ssteve.reinhardt@amd.com 187211383Sbrandon.potter@amd.com if (pmap == (decltype(pmap))-1) { 187311383Sbrandon.potter@amd.com warn("mmap: failed to map file into host address space"); 187411383Sbrandon.potter@amd.com return -errno; 18758600Ssteve.reinhardt@amd.com } 18762544SN/A } 18772544SN/A 187811383Sbrandon.potter@amd.com // Extend global mmap region if necessary. Note that we ignore the 187911383Sbrandon.potter@amd.com // start address unless MAP_FIXED is specified. 188011383Sbrandon.potter@amd.com if (!(tgt_flags & OS::TGT_MAP_FIXED)) { 188111905SBrandon.Potter@amd.com std::shared_ptr<MemState> mem_state = p->memState; 188211905SBrandon.Potter@amd.com Addr mmap_end = mem_state->getMmapEnd(); 188311905SBrandon.Potter@amd.com 188411905SBrandon.Potter@amd.com start = p->mmapGrowsDown() ? mmap_end - length : mmap_end; 188511905SBrandon.Potter@amd.com mmap_end = p->mmapGrowsDown() ? start : mmap_end + length; 188611905SBrandon.Potter@amd.com 188711905SBrandon.Potter@amd.com mem_state->setMmapEnd(mmap_end); 188811383Sbrandon.potter@amd.com } 188911383Sbrandon.potter@amd.com 189011383Sbrandon.potter@amd.com DPRINTF_SYSCALL(Verbose, " mmap range is 0x%x - 0x%x\n", 189111383Sbrandon.potter@amd.com start, start + length - 1); 189211383Sbrandon.potter@amd.com 189311383Sbrandon.potter@amd.com // We only allow mappings to overwrite existing mappings if 189411383Sbrandon.potter@amd.com // TGT_MAP_FIXED is set. Otherwise it shouldn't be a problem 189511383Sbrandon.potter@amd.com // because we ignore the start hint if TGT_MAP_FIXED is not set. 189611383Sbrandon.potter@amd.com int clobber = tgt_flags & OS::TGT_MAP_FIXED; 189711383Sbrandon.potter@amd.com if (clobber) { 189811383Sbrandon.potter@amd.com for (auto tc : p->system->threadContexts) { 189911383Sbrandon.potter@amd.com // If we might be overwriting old mappings, we need to 190011383Sbrandon.potter@amd.com // invalidate potentially stale mappings out of the TLBs. 190111383Sbrandon.potter@amd.com tc->getDTBPtr()->flushAll(); 190211383Sbrandon.potter@amd.com tc->getITBPtr()->flushAll(); 19038600Ssteve.reinhardt@amd.com } 19046672Sgblack@eecs.umich.edu } 19058600Ssteve.reinhardt@amd.com 190611383Sbrandon.potter@amd.com // Allocate physical memory and map it in. If the page table is already 190711383Sbrandon.potter@amd.com // mapped and clobber is not set, the simulator will issue throw a 190811383Sbrandon.potter@amd.com // fatal and bail out of the simulation. 19098601Ssteve.reinhardt@amd.com p->allocateMem(start, length, clobber); 19102544SN/A 191111383Sbrandon.potter@amd.com // Transfer content into target address space. 191211383Sbrandon.potter@amd.com SETranslatingPortProxy &tp = tc->getMemProxy(); 191311383Sbrandon.potter@amd.com if (tgt_flags & OS::TGT_MAP_ANONYMOUS) { 191411383Sbrandon.potter@amd.com // In general, we should zero the mapped area for anonymous mappings, 191511383Sbrandon.potter@amd.com // with something like: 191611383Sbrandon.potter@amd.com // tp.memsetBlob(start, 0, length); 191711383Sbrandon.potter@amd.com // However, given that we don't support sparse mappings, and 191811383Sbrandon.potter@amd.com // some applications can map a couple of gigabytes of space 191911383Sbrandon.potter@amd.com // (intending sparse usage), that can get painfully expensive. 192011383Sbrandon.potter@amd.com // Fortunately, since we don't properly implement munmap either, 192111383Sbrandon.potter@amd.com // there's no danger of remapping used memory, so for now all 192211383Sbrandon.potter@amd.com // newly mapped memory should already be zeroed so we can skip it. 192311383Sbrandon.potter@amd.com } else { 192411383Sbrandon.potter@amd.com // It is possible to mmap an area larger than a file, however 192511383Sbrandon.potter@amd.com // accessing unmapped portions the system triggers a "Bus error" 192611383Sbrandon.potter@amd.com // on the host. We must know when to stop copying the file from 192711383Sbrandon.potter@amd.com // the host into the target address space. 192811383Sbrandon.potter@amd.com struct stat file_stat; 192911383Sbrandon.potter@amd.com if (fstat(sim_fd, &file_stat) > 0) 193011383Sbrandon.potter@amd.com fatal("mmap: cannot stat file"); 193111383Sbrandon.potter@amd.com 193211383Sbrandon.potter@amd.com // Copy the portion of the file that is resident. This requires 193311383Sbrandon.potter@amd.com // checking both the mmap size and the filesize that we are 193411383Sbrandon.potter@amd.com // trying to mmap into this space; the mmap size also depends 193511383Sbrandon.potter@amd.com // on the specified offset into the file. 193611383Sbrandon.potter@amd.com uint64_t size = std::min((uint64_t)file_stat.st_size - offset, 193711383Sbrandon.potter@amd.com length); 193811383Sbrandon.potter@amd.com tp.writeBlob(start, pmap, size); 193911383Sbrandon.potter@amd.com 194011383Sbrandon.potter@amd.com // Cleanup the mmap region before exiting this function. 194111383Sbrandon.potter@amd.com munmap(pmap, length); 194211383Sbrandon.potter@amd.com 194311392Sbrandon.potter@amd.com // Maintain the symbol table for dynamic executables. 194411392Sbrandon.potter@amd.com // The loader will call mmap to map the images into its address 194511392Sbrandon.potter@amd.com // space and we intercept that here. We can verify that we are 194611392Sbrandon.potter@amd.com // executing inside the loader by checking the program counter value. 194711392Sbrandon.potter@amd.com // XXX: with multiprogrammed workloads or multi-node configurations, 194811392Sbrandon.potter@amd.com // this will not work since there is a single global symbol table. 194911392Sbrandon.potter@amd.com ObjectFile *interpreter = p->getInterpreter(); 195011392Sbrandon.potter@amd.com if (interpreter) { 195111392Sbrandon.potter@amd.com Addr text_start = interpreter->textBase(); 195211392Sbrandon.potter@amd.com Addr text_end = text_start + interpreter->textSize(); 195311392Sbrandon.potter@amd.com 195411392Sbrandon.potter@amd.com Addr pc = tc->pcState().pc(); 195511392Sbrandon.potter@amd.com 195611392Sbrandon.potter@amd.com if (pc >= text_start && pc < text_end) { 195711856Sbrandon.potter@amd.com std::shared_ptr<FDEntry> fdep = (*p->fds)[tgt_fd]; 195811856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(fdep); 195911856Sbrandon.potter@amd.com ObjectFile *lib = createObjectFile(ffdp->getFileName()); 196011392Sbrandon.potter@amd.com 196111392Sbrandon.potter@amd.com if (lib) { 196211392Sbrandon.potter@amd.com lib->loadAllSymbols(debugSymbolTable, 196311392Sbrandon.potter@amd.com lib->textBase(), start); 196411392Sbrandon.potter@amd.com } 196511392Sbrandon.potter@amd.com } 196611392Sbrandon.potter@amd.com } 196711392Sbrandon.potter@amd.com 196811383Sbrandon.potter@amd.com // Note that we do not zero out the remainder of the mapping. This 196911383Sbrandon.potter@amd.com // is done by a real system, but it probably will not affect 197011383Sbrandon.potter@amd.com // execution (hopefully). 197111383Sbrandon.potter@amd.com } 197211383Sbrandon.potter@amd.com 19731458SN/A return start; 1974360SN/A} 1975360SN/A 197611593Santhony.gutierrez@amd.comtemplate <class OS> 197711593Santhony.gutierrez@amd.comSyscallReturn 197811851Sbrandon.potter@amd.compwrite64Func(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 197911593Santhony.gutierrez@amd.com{ 198011593Santhony.gutierrez@amd.com int index = 0; 198111593Santhony.gutierrez@amd.com int tgt_fd = p->getSyscallArg(tc, index); 198211593Santhony.gutierrez@amd.com Addr bufPtr = p->getSyscallArg(tc, index); 198311593Santhony.gutierrez@amd.com int nbytes = p->getSyscallArg(tc, index); 198411593Santhony.gutierrez@amd.com int offset = p->getSyscallArg(tc, index); 198511593Santhony.gutierrez@amd.com 198611856Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 198711856Sbrandon.potter@amd.com if (!ffdp) 198811593Santhony.gutierrez@amd.com return -EBADF; 198911856Sbrandon.potter@amd.com int sim_fd = ffdp->getSimFD(); 199011593Santhony.gutierrez@amd.com 199111593Santhony.gutierrez@amd.com BufferArg bufArg(bufPtr, nbytes); 199211593Santhony.gutierrez@amd.com bufArg.copyIn(tc->getMemProxy()); 199311593Santhony.gutierrez@amd.com 199411594Santhony.gutierrez@amd.com int bytes_written = pwrite(sim_fd, bufArg.bufferPtr(), nbytes, offset); 199511593Santhony.gutierrez@amd.com 199611593Santhony.gutierrez@amd.com return (bytes_written == -1) ? -errno : bytes_written; 199711593Santhony.gutierrez@amd.com} 199811593Santhony.gutierrez@amd.com 199911385Sbrandon.potter@amd.com/// Target mmap() handler. 200011385Sbrandon.potter@amd.comtemplate <class OS> 200111385Sbrandon.potter@amd.comSyscallReturn 200211851Sbrandon.potter@amd.commmapFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 200311385Sbrandon.potter@amd.com{ 200411385Sbrandon.potter@amd.com return mmapImpl<OS>(desc, num, p, tc, false); 200511385Sbrandon.potter@amd.com} 200611385Sbrandon.potter@amd.com 200711385Sbrandon.potter@amd.com/// Target mmap2() handler. 200811385Sbrandon.potter@amd.comtemplate <class OS> 200911385Sbrandon.potter@amd.comSyscallReturn 201011851Sbrandon.potter@amd.commmap2Func(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 201111385Sbrandon.potter@amd.com{ 201211385Sbrandon.potter@amd.com return mmapImpl<OS>(desc, num, p, tc, true); 201311385Sbrandon.potter@amd.com} 201411385Sbrandon.potter@amd.com 2015378SN/A/// Target getrlimit() handler. 2016360SN/Atemplate <class OS> 20171450SN/ASyscallReturn 201811851Sbrandon.potter@amd.comgetrlimitFunc(SyscallDesc *desc, int callnum, Process *process, 201911851Sbrandon.potter@amd.com ThreadContext *tc) 2020360SN/A{ 20216701Sgblack@eecs.umich.edu int index = 0; 20226701Sgblack@eecs.umich.edu unsigned resource = process->getSyscallArg(tc, index); 20236701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::rlimit> rlp(process->getSyscallArg(tc, index)); 2024360SN/A 2025360SN/A switch (resource) { 202611906SBrandon.Potter@amd.com case OS::TGT_RLIMIT_STACK: 202711906SBrandon.Potter@amd.com // max stack size in bytes: make up a number (8MB for now) 202811906SBrandon.Potter@amd.com rlp->rlim_cur = rlp->rlim_max = 8 * 1024 * 1024; 202911906SBrandon.Potter@amd.com rlp->rlim_cur = TheISA::htog(rlp->rlim_cur); 203011906SBrandon.Potter@amd.com rlp->rlim_max = TheISA::htog(rlp->rlim_max); 203111906SBrandon.Potter@amd.com break; 2032360SN/A 203311906SBrandon.Potter@amd.com case OS::TGT_RLIMIT_DATA: 203411906SBrandon.Potter@amd.com // max data segment size in bytes: make up a number 203511906SBrandon.Potter@amd.com rlp->rlim_cur = rlp->rlim_max = 256 * 1024 * 1024; 203611906SBrandon.Potter@amd.com rlp->rlim_cur = TheISA::htog(rlp->rlim_cur); 203711906SBrandon.Potter@amd.com rlp->rlim_max = TheISA::htog(rlp->rlim_max); 203811906SBrandon.Potter@amd.com break; 20395877Shsul@eecs.umich.edu 204011906SBrandon.Potter@amd.com default: 204111906SBrandon.Potter@amd.com warn("getrlimit: unimplemented resource %d", resource); 204211906SBrandon.Potter@amd.com return -EINVAL; 204311906SBrandon.Potter@amd.com break; 2044360SN/A } 2045360SN/A 20468706Sandreas.hansson@arm.com rlp.copyOut(tc->getMemProxy()); 20471458SN/A return 0; 2048360SN/A} 2049360SN/A 205012235Sar4jc@virginia.edutemplate <class OS> 205112235Sar4jc@virginia.eduSyscallReturn 205212235Sar4jc@virginia.eduprlimitFunc(SyscallDesc *desc, int callnum, Process *process, 205312235Sar4jc@virginia.edu ThreadContext *tc) 205412235Sar4jc@virginia.edu{ 205512235Sar4jc@virginia.edu int index = 0; 205612235Sar4jc@virginia.edu if (process->getSyscallArg(tc, index) != 0) 205712235Sar4jc@virginia.edu { 205812235Sar4jc@virginia.edu warn("prlimit: ignoring rlimits for nonzero pid"); 205912235Sar4jc@virginia.edu return -EPERM; 206012235Sar4jc@virginia.edu } 206112235Sar4jc@virginia.edu int resource = process->getSyscallArg(tc, index); 206212235Sar4jc@virginia.edu Addr n = process->getSyscallArg(tc, index); 206312235Sar4jc@virginia.edu if (n != 0) 206412235Sar4jc@virginia.edu warn("prlimit: ignoring new rlimit"); 206512235Sar4jc@virginia.edu Addr o = process->getSyscallArg(tc, index); 206612235Sar4jc@virginia.edu if (o != 0) 206712235Sar4jc@virginia.edu { 206812416Sqtt2@cornell.edu TypedBufferArg<typename OS::rlimit> rlp(o); 206912235Sar4jc@virginia.edu switch (resource) { 207012235Sar4jc@virginia.edu case OS::TGT_RLIMIT_STACK: 207112235Sar4jc@virginia.edu // max stack size in bytes: make up a number (8MB for now) 207212235Sar4jc@virginia.edu rlp->rlim_cur = rlp->rlim_max = 8 * 1024 * 1024; 207312235Sar4jc@virginia.edu rlp->rlim_cur = TheISA::htog(rlp->rlim_cur); 207412235Sar4jc@virginia.edu rlp->rlim_max = TheISA::htog(rlp->rlim_max); 207512235Sar4jc@virginia.edu break; 207612235Sar4jc@virginia.edu case OS::TGT_RLIMIT_DATA: 207712235Sar4jc@virginia.edu // max data segment size in bytes: make up a number 207812235Sar4jc@virginia.edu rlp->rlim_cur = rlp->rlim_max = 256*1024*1024; 207912235Sar4jc@virginia.edu rlp->rlim_cur = TheISA::htog(rlp->rlim_cur); 208012235Sar4jc@virginia.edu rlp->rlim_max = TheISA::htog(rlp->rlim_max); 208112593Sjason@lowepower.com break; 208212235Sar4jc@virginia.edu default: 208312235Sar4jc@virginia.edu warn("prlimit: unimplemented resource %d", resource); 208412235Sar4jc@virginia.edu return -EINVAL; 208512235Sar4jc@virginia.edu break; 208612235Sar4jc@virginia.edu } 208712235Sar4jc@virginia.edu rlp.copyOut(tc->getMemProxy()); 208812235Sar4jc@virginia.edu } 208912235Sar4jc@virginia.edu return 0; 209012235Sar4jc@virginia.edu} 209112235Sar4jc@virginia.edu 209210796Sbrandon.potter@amd.com/// Target clock_gettime() function. 209310796Sbrandon.potter@amd.comtemplate <class OS> 209410796Sbrandon.potter@amd.comSyscallReturn 209511851Sbrandon.potter@amd.comclock_gettimeFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 209610796Sbrandon.potter@amd.com{ 209710796Sbrandon.potter@amd.com int index = 1; 209810796Sbrandon.potter@amd.com //int clk_id = p->getSyscallArg(tc, index); 209910796Sbrandon.potter@amd.com TypedBufferArg<typename OS::timespec> tp(p->getSyscallArg(tc, index)); 210010796Sbrandon.potter@amd.com 210110796Sbrandon.potter@amd.com getElapsedTimeNano(tp->tv_sec, tp->tv_nsec); 210210796Sbrandon.potter@amd.com tp->tv_sec += seconds_since_epoch; 210310796Sbrandon.potter@amd.com tp->tv_sec = TheISA::htog(tp->tv_sec); 210410796Sbrandon.potter@amd.com tp->tv_nsec = TheISA::htog(tp->tv_nsec); 210510796Sbrandon.potter@amd.com 210610796Sbrandon.potter@amd.com tp.copyOut(tc->getMemProxy()); 210710796Sbrandon.potter@amd.com 210810796Sbrandon.potter@amd.com return 0; 210910796Sbrandon.potter@amd.com} 211010796Sbrandon.potter@amd.com 211111337SMichael.Lebeane@amd.com/// Target clock_getres() function. 211211337SMichael.Lebeane@amd.comtemplate <class OS> 211311337SMichael.Lebeane@amd.comSyscallReturn 211411851Sbrandon.potter@amd.comclock_getresFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 211511337SMichael.Lebeane@amd.com{ 211611337SMichael.Lebeane@amd.com int index = 1; 211711337SMichael.Lebeane@amd.com TypedBufferArg<typename OS::timespec> tp(p->getSyscallArg(tc, index)); 211811337SMichael.Lebeane@amd.com 211911337SMichael.Lebeane@amd.com // Set resolution at ns, which is what clock_gettime() returns 212011337SMichael.Lebeane@amd.com tp->tv_sec = 0; 212111337SMichael.Lebeane@amd.com tp->tv_nsec = 1; 212211337SMichael.Lebeane@amd.com 212311337SMichael.Lebeane@amd.com tp.copyOut(tc->getMemProxy()); 212411337SMichael.Lebeane@amd.com 212511337SMichael.Lebeane@amd.com return 0; 212611337SMichael.Lebeane@amd.com} 212711337SMichael.Lebeane@amd.com 2128378SN/A/// Target gettimeofday() handler. 2129360SN/Atemplate <class OS> 21301450SN/ASyscallReturn 213111851Sbrandon.potter@amd.comgettimeofdayFunc(SyscallDesc *desc, int callnum, Process *process, 213211851Sbrandon.potter@amd.com ThreadContext *tc) 2133360SN/A{ 21346701Sgblack@eecs.umich.edu int index = 0; 21356701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::timeval> tp(process->getSyscallArg(tc, index)); 2136360SN/A 213710796Sbrandon.potter@amd.com getElapsedTimeMicro(tp->tv_sec, tp->tv_usec); 2138360SN/A tp->tv_sec += seconds_since_epoch; 21396109Ssanchezd@stanford.edu tp->tv_sec = TheISA::htog(tp->tv_sec); 21406109Ssanchezd@stanford.edu tp->tv_usec = TheISA::htog(tp->tv_usec); 2141360SN/A 21428706Sandreas.hansson@arm.com tp.copyOut(tc->getMemProxy()); 2143360SN/A 21441458SN/A return 0; 2145360SN/A} 2146360SN/A 2147360SN/A 21481999SN/A/// Target utimes() handler. 21491999SN/Atemplate <class OS> 21501999SN/ASyscallReturn 215111851Sbrandon.potter@amd.comutimesFunc(SyscallDesc *desc, int callnum, Process *process, 21522680Sktlim@umich.edu ThreadContext *tc) 21531999SN/A{ 21541999SN/A std::string path; 21551999SN/A 21566701Sgblack@eecs.umich.edu int index = 0; 21578852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryReadString(path, 21586701Sgblack@eecs.umich.edu process->getSyscallArg(tc, index))) { 21596701Sgblack@eecs.umich.edu return -EFAULT; 21606701Sgblack@eecs.umich.edu } 21611999SN/A 21626701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::timeval [2]> 21636701Sgblack@eecs.umich.edu tp(process->getSyscallArg(tc, index)); 21648706Sandreas.hansson@arm.com tp.copyIn(tc->getMemProxy()); 21651999SN/A 21661999SN/A struct timeval hostTimeval[2]; 216711906SBrandon.Potter@amd.com for (int i = 0; i < 2; ++i) { 21688737Skoansin.tan@gmail.com hostTimeval[i].tv_sec = TheISA::gtoh((*tp)[i].tv_sec); 21698737Skoansin.tan@gmail.com hostTimeval[i].tv_usec = TheISA::gtoh((*tp)[i].tv_usec); 21701999SN/A } 21713669Sbinkertn@umich.edu 217213883Sdavid.hashe@amd.com // Adjust path for cwd and redirection 217313883Sdavid.hashe@amd.com path = process->checkPathRedirect(path); 21743669Sbinkertn@umich.edu 21751999SN/A int result = utimes(path.c_str(), hostTimeval); 21761999SN/A 21771999SN/A if (result < 0) 21781999SN/A return -errno; 21791999SN/A 21801999SN/A return 0; 21811999SN/A} 218211886Sbrandon.potter@amd.com 218311886Sbrandon.potter@amd.comtemplate <class OS> 218411886Sbrandon.potter@amd.comSyscallReturn 218511886Sbrandon.potter@amd.comexecveFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 218611886Sbrandon.potter@amd.com{ 218711886Sbrandon.potter@amd.com desc->setFlags(0); 218811886Sbrandon.potter@amd.com 218911886Sbrandon.potter@amd.com int index = 0; 219011886Sbrandon.potter@amd.com std::string path; 219111886Sbrandon.potter@amd.com SETranslatingPortProxy & mem_proxy = tc->getMemProxy(); 219211886Sbrandon.potter@amd.com if (!mem_proxy.tryReadString(path, p->getSyscallArg(tc, index))) 219311886Sbrandon.potter@amd.com return -EFAULT; 219411886Sbrandon.potter@amd.com 219511886Sbrandon.potter@amd.com if (access(path.c_str(), F_OK) == -1) 219611886Sbrandon.potter@amd.com return -EACCES; 219711886Sbrandon.potter@amd.com 219811886Sbrandon.potter@amd.com auto read_in = [](std::vector<std::string> & vect, 219911886Sbrandon.potter@amd.com SETranslatingPortProxy & mem_proxy, 220011886Sbrandon.potter@amd.com Addr mem_loc) 220111886Sbrandon.potter@amd.com { 220211886Sbrandon.potter@amd.com for (int inc = 0; ; inc++) { 220311886Sbrandon.potter@amd.com BufferArg b((mem_loc + sizeof(Addr) * inc), sizeof(Addr)); 220411886Sbrandon.potter@amd.com b.copyIn(mem_proxy); 220511886Sbrandon.potter@amd.com 220611886Sbrandon.potter@amd.com if (!*(Addr*)b.bufferPtr()) 220711886Sbrandon.potter@amd.com break; 220811886Sbrandon.potter@amd.com 220911886Sbrandon.potter@amd.com vect.push_back(std::string()); 221011886Sbrandon.potter@amd.com mem_proxy.tryReadString(vect[inc], *(Addr*)b.bufferPtr()); 221111886Sbrandon.potter@amd.com } 221211886Sbrandon.potter@amd.com }; 221311886Sbrandon.potter@amd.com 221411886Sbrandon.potter@amd.com /** 221511886Sbrandon.potter@amd.com * Note that ProcessParams is generated by swig and there are no other 221611886Sbrandon.potter@amd.com * examples of how to create anything but this default constructor. The 221711886Sbrandon.potter@amd.com * fields are manually initialized instead of passing parameters to the 221811886Sbrandon.potter@amd.com * constructor. 221911886Sbrandon.potter@amd.com */ 222011886Sbrandon.potter@amd.com ProcessParams *pp = new ProcessParams(); 222111886Sbrandon.potter@amd.com pp->executable = path; 222211886Sbrandon.potter@amd.com Addr argv_mem_loc = p->getSyscallArg(tc, index); 222311886Sbrandon.potter@amd.com read_in(pp->cmd, mem_proxy, argv_mem_loc); 222411886Sbrandon.potter@amd.com Addr envp_mem_loc = p->getSyscallArg(tc, index); 222511886Sbrandon.potter@amd.com read_in(pp->env, mem_proxy, envp_mem_loc); 222611886Sbrandon.potter@amd.com pp->uid = p->uid(); 222711886Sbrandon.potter@amd.com pp->egid = p->egid(); 222811886Sbrandon.potter@amd.com pp->euid = p->euid(); 222911886Sbrandon.potter@amd.com pp->gid = p->gid(); 223011886Sbrandon.potter@amd.com pp->ppid = p->ppid(); 223111886Sbrandon.potter@amd.com pp->pid = p->pid(); 223211886Sbrandon.potter@amd.com pp->input.assign("cin"); 223311886Sbrandon.potter@amd.com pp->output.assign("cout"); 223411886Sbrandon.potter@amd.com pp->errout.assign("cerr"); 223513883Sdavid.hashe@amd.com pp->cwd.assign(p->tgtCwd); 223611886Sbrandon.potter@amd.com pp->system = p->system; 223711886Sbrandon.potter@amd.com /** 223811886Sbrandon.potter@amd.com * Prevent process object creation with identical PIDs (which will trip 223911886Sbrandon.potter@amd.com * a fatal check in Process constructor). The execve call is supposed to 224011886Sbrandon.potter@amd.com * take over the currently executing process' identity but replace 224111886Sbrandon.potter@amd.com * whatever it is doing with a new process image. Instead of hijacking 224211886Sbrandon.potter@amd.com * the process object in the simulator, we create a new process object 224311886Sbrandon.potter@amd.com * and bind to the previous process' thread below (hijacking the thread). 224411886Sbrandon.potter@amd.com */ 224511886Sbrandon.potter@amd.com p->system->PIDs.erase(p->pid()); 224611886Sbrandon.potter@amd.com Process *new_p = pp->create(); 224711886Sbrandon.potter@amd.com delete pp; 224811886Sbrandon.potter@amd.com 224911886Sbrandon.potter@amd.com /** 225011886Sbrandon.potter@amd.com * Work through the file descriptor array and close any files marked 225111886Sbrandon.potter@amd.com * close-on-exec. 225211886Sbrandon.potter@amd.com */ 225311886Sbrandon.potter@amd.com new_p->fds = p->fds; 225411886Sbrandon.potter@amd.com for (int i = 0; i < new_p->fds->getSize(); i++) { 225511886Sbrandon.potter@amd.com std::shared_ptr<FDEntry> fdep = (*new_p->fds)[i]; 225611886Sbrandon.potter@amd.com if (fdep && fdep->getCOE()) 225711886Sbrandon.potter@amd.com new_p->fds->closeFDEntry(i); 225811886Sbrandon.potter@amd.com } 225911886Sbrandon.potter@amd.com 226011886Sbrandon.potter@amd.com *new_p->sigchld = true; 226111886Sbrandon.potter@amd.com 226211886Sbrandon.potter@amd.com delete p; 226311886Sbrandon.potter@amd.com tc->clearArchRegs(); 226411886Sbrandon.potter@amd.com tc->setProcessPtr(new_p); 226511886Sbrandon.potter@amd.com new_p->assignThreadContext(tc->contextId()); 226611886Sbrandon.potter@amd.com new_p->initState(); 226711886Sbrandon.potter@amd.com tc->activate(); 226811886Sbrandon.potter@amd.com TheISA::PCState pcState = tc->pcState(); 226911886Sbrandon.potter@amd.com tc->setNPC(pcState.instAddr()); 227011886Sbrandon.potter@amd.com 227111886Sbrandon.potter@amd.com desc->setFlags(SyscallDesc::SuppressReturnValue); 227211886Sbrandon.potter@amd.com return 0; 227311886Sbrandon.potter@amd.com} 227411886Sbrandon.potter@amd.com 2275378SN/A/// Target getrusage() function. 2276360SN/Atemplate <class OS> 22771450SN/ASyscallReturn 227811851Sbrandon.potter@amd.comgetrusageFunc(SyscallDesc *desc, int callnum, Process *process, 22792680Sktlim@umich.edu ThreadContext *tc) 2280360SN/A{ 22816701Sgblack@eecs.umich.edu int index = 0; 22826701Sgblack@eecs.umich.edu int who = process->getSyscallArg(tc, index); // THREAD, SELF, or CHILDREN 22836701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::rusage> rup(process->getSyscallArg(tc, index)); 2284360SN/A 22853670Sbinkertn@umich.edu rup->ru_utime.tv_sec = 0; 22863670Sbinkertn@umich.edu rup->ru_utime.tv_usec = 0; 2287360SN/A rup->ru_stime.tv_sec = 0; 2288360SN/A rup->ru_stime.tv_usec = 0; 2289360SN/A rup->ru_maxrss = 0; 2290360SN/A rup->ru_ixrss = 0; 2291360SN/A rup->ru_idrss = 0; 2292360SN/A rup->ru_isrss = 0; 2293360SN/A rup->ru_minflt = 0; 2294360SN/A rup->ru_majflt = 0; 2295360SN/A rup->ru_nswap = 0; 2296360SN/A rup->ru_inblock = 0; 2297360SN/A rup->ru_oublock = 0; 2298360SN/A rup->ru_msgsnd = 0; 2299360SN/A rup->ru_msgrcv = 0; 2300360SN/A rup->ru_nsignals = 0; 2301360SN/A rup->ru_nvcsw = 0; 2302360SN/A rup->ru_nivcsw = 0; 2303360SN/A 23043670Sbinkertn@umich.edu switch (who) { 23053670Sbinkertn@umich.edu case OS::TGT_RUSAGE_SELF: 230610796Sbrandon.potter@amd.com getElapsedTimeMicro(rup->ru_utime.tv_sec, rup->ru_utime.tv_usec); 23078737Skoansin.tan@gmail.com rup->ru_utime.tv_sec = TheISA::htog(rup->ru_utime.tv_sec); 23088737Skoansin.tan@gmail.com rup->ru_utime.tv_usec = TheISA::htog(rup->ru_utime.tv_usec); 23093670Sbinkertn@umich.edu break; 23103670Sbinkertn@umich.edu 23113670Sbinkertn@umich.edu case OS::TGT_RUSAGE_CHILDREN: 23123670Sbinkertn@umich.edu // do nothing. We have no child processes, so they take no time. 23133670Sbinkertn@umich.edu break; 23143670Sbinkertn@umich.edu 23153670Sbinkertn@umich.edu default: 23163670Sbinkertn@umich.edu // don't really handle THREAD or CHILDREN, but just warn and 23173670Sbinkertn@umich.edu // plow ahead 23183670Sbinkertn@umich.edu warn("getrusage() only supports RUSAGE_SELF. Parameter %d ignored.", 23193670Sbinkertn@umich.edu who); 23203670Sbinkertn@umich.edu } 23213670Sbinkertn@umich.edu 23228706Sandreas.hansson@arm.com rup.copyOut(tc->getMemProxy()); 2323360SN/A 23241458SN/A return 0; 2325360SN/A} 2326360SN/A 23276683Stjones1@inf.ed.ac.uk/// Target times() function. 23286683Stjones1@inf.ed.ac.uktemplate <class OS> 23296683Stjones1@inf.ed.ac.ukSyscallReturn 233011851Sbrandon.potter@amd.comtimesFunc(SyscallDesc *desc, int callnum, Process *process, 233111851Sbrandon.potter@amd.com ThreadContext *tc) 23326683Stjones1@inf.ed.ac.uk{ 23336701Sgblack@eecs.umich.edu int index = 0; 23346701Sgblack@eecs.umich.edu TypedBufferArg<typename OS::tms> bufp(process->getSyscallArg(tc, index)); 23356683Stjones1@inf.ed.ac.uk 23366683Stjones1@inf.ed.ac.uk // Fill in the time structure (in clocks) 23377823Ssteve.reinhardt@amd.com int64_t clocks = curTick() * OS::M5_SC_CLK_TCK / SimClock::Int::s; 23386683Stjones1@inf.ed.ac.uk bufp->tms_utime = clocks; 23396683Stjones1@inf.ed.ac.uk bufp->tms_stime = 0; 23406683Stjones1@inf.ed.ac.uk bufp->tms_cutime = 0; 23416683Stjones1@inf.ed.ac.uk bufp->tms_cstime = 0; 23426683Stjones1@inf.ed.ac.uk 23436683Stjones1@inf.ed.ac.uk // Convert to host endianness 23448737Skoansin.tan@gmail.com bufp->tms_utime = TheISA::htog(bufp->tms_utime); 23456683Stjones1@inf.ed.ac.uk 23466683Stjones1@inf.ed.ac.uk // Write back 23478706Sandreas.hansson@arm.com bufp.copyOut(tc->getMemProxy()); 23486683Stjones1@inf.ed.ac.uk 23496683Stjones1@inf.ed.ac.uk // Return clock ticks since system boot 23506683Stjones1@inf.ed.ac.uk return clocks; 23516683Stjones1@inf.ed.ac.uk} 23522553SN/A 23536684Stjones1@inf.ed.ac.uk/// Target time() function. 23546684Stjones1@inf.ed.ac.uktemplate <class OS> 23556684Stjones1@inf.ed.ac.ukSyscallReturn 235611851Sbrandon.potter@amd.comtimeFunc(SyscallDesc *desc, int callnum, Process *process, ThreadContext *tc) 23576684Stjones1@inf.ed.ac.uk{ 23586684Stjones1@inf.ed.ac.uk typename OS::time_t sec, usec; 235910796Sbrandon.potter@amd.com getElapsedTimeMicro(sec, usec); 23606684Stjones1@inf.ed.ac.uk sec += seconds_since_epoch; 23616684Stjones1@inf.ed.ac.uk 23626701Sgblack@eecs.umich.edu int index = 0; 23636701Sgblack@eecs.umich.edu Addr taddr = (Addr)process->getSyscallArg(tc, index); 236411321Ssteve.reinhardt@amd.com if (taddr != 0) { 23656684Stjones1@inf.ed.ac.uk typename OS::time_t t = sec; 23668737Skoansin.tan@gmail.com t = TheISA::htog(t); 23678852Sandreas.hansson@arm.com SETranslatingPortProxy &p = tc->getMemProxy(); 23688852Sandreas.hansson@arm.com p.writeBlob(taddr, (uint8_t*)&t, (int)sizeof(typename OS::time_t)); 23696684Stjones1@inf.ed.ac.uk } 23706684Stjones1@inf.ed.ac.uk return sec; 23716684Stjones1@inf.ed.ac.uk} 23722553SN/A 237311910SBrandon.Potter@amd.comtemplate <class OS> 237411910SBrandon.Potter@amd.comSyscallReturn 237511910SBrandon.Potter@amd.comtgkillFunc(SyscallDesc *desc, int num, Process *process, ThreadContext *tc) 237611910SBrandon.Potter@amd.com{ 237711910SBrandon.Potter@amd.com int index = 0; 237811910SBrandon.Potter@amd.com int tgid = process->getSyscallArg(tc, index); 237911910SBrandon.Potter@amd.com int tid = process->getSyscallArg(tc, index); 238011910SBrandon.Potter@amd.com int sig = process->getSyscallArg(tc, index); 238111910SBrandon.Potter@amd.com 238211910SBrandon.Potter@amd.com /** 238311910SBrandon.Potter@amd.com * This system call is intended to allow killing a specific thread 238411910SBrandon.Potter@amd.com * within an arbitrary thread group if sanctioned with permission checks. 238511910SBrandon.Potter@amd.com * It's usually true that threads share the termination signal as pointed 238611910SBrandon.Potter@amd.com * out by the pthread_kill man page and this seems to be the intended 238711910SBrandon.Potter@amd.com * usage. Due to this being an emulated environment, assume the following: 238811910SBrandon.Potter@amd.com * Threads are allowed to call tgkill because the EUID for all threads 238911910SBrandon.Potter@amd.com * should be the same. There is no signal handling mechanism for kernel 239011910SBrandon.Potter@amd.com * registration of signal handlers since signals are poorly supported in 239111910SBrandon.Potter@amd.com * emulation mode. Since signal handlers cannot be registered, all 239211910SBrandon.Potter@amd.com * threads within in a thread group must share the termination signal. 239311910SBrandon.Potter@amd.com * We never exhaust PIDs so there's no chance of finding the wrong one 239411910SBrandon.Potter@amd.com * due to PID rollover. 239511910SBrandon.Potter@amd.com */ 239611910SBrandon.Potter@amd.com 239711910SBrandon.Potter@amd.com System *sys = tc->getSystemPtr(); 239811910SBrandon.Potter@amd.com Process *tgt_proc = nullptr; 239911910SBrandon.Potter@amd.com for (int i = 0; i < sys->numContexts(); i++) { 240011910SBrandon.Potter@amd.com Process *temp = sys->threadContexts[i]->getProcessPtr(); 240111910SBrandon.Potter@amd.com if (temp->pid() == tid) { 240211910SBrandon.Potter@amd.com tgt_proc = temp; 240311910SBrandon.Potter@amd.com break; 240411910SBrandon.Potter@amd.com } 240511910SBrandon.Potter@amd.com } 240611910SBrandon.Potter@amd.com 240711910SBrandon.Potter@amd.com if (sig != 0 || sig != OS::TGT_SIGABRT) 240811910SBrandon.Potter@amd.com return -EINVAL; 240911910SBrandon.Potter@amd.com 241011910SBrandon.Potter@amd.com if (tgt_proc == nullptr) 241111910SBrandon.Potter@amd.com return -ESRCH; 241211910SBrandon.Potter@amd.com 241311910SBrandon.Potter@amd.com if (tgid != -1 && tgt_proc->tgid() != tgid) 241411910SBrandon.Potter@amd.com return -ESRCH; 241511910SBrandon.Potter@amd.com 241611910SBrandon.Potter@amd.com if (sig == OS::TGT_SIGABRT) 241711910SBrandon.Potter@amd.com exitGroupFunc(desc, 252, process, tc); 241811910SBrandon.Potter@amd.com 241911910SBrandon.Potter@amd.com return 0; 242011910SBrandon.Potter@amd.com} 242111910SBrandon.Potter@amd.com 242213568Sbrandon.potter@amd.comtemplate <class OS> 242313568Sbrandon.potter@amd.comSyscallReturn 242413568Sbrandon.potter@amd.comsocketFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 242513568Sbrandon.potter@amd.com{ 242613568Sbrandon.potter@amd.com int index = 0; 242713568Sbrandon.potter@amd.com int domain = p->getSyscallArg(tc, index); 242813568Sbrandon.potter@amd.com int type = p->getSyscallArg(tc, index); 242913568Sbrandon.potter@amd.com int prot = p->getSyscallArg(tc, index); 243013568Sbrandon.potter@amd.com 243113568Sbrandon.potter@amd.com int sim_fd = socket(domain, type, prot); 243213568Sbrandon.potter@amd.com if (sim_fd == -1) 243313568Sbrandon.potter@amd.com return -errno; 243413568Sbrandon.potter@amd.com 243513568Sbrandon.potter@amd.com auto sfdp = std::make_shared<SocketFDEntry>(sim_fd, domain, type, prot); 243613568Sbrandon.potter@amd.com int tgt_fd = p->fds->allocFD(sfdp); 243713568Sbrandon.potter@amd.com 243813568Sbrandon.potter@amd.com return tgt_fd; 243913568Sbrandon.potter@amd.com} 244013568Sbrandon.potter@amd.com 244113568Sbrandon.potter@amd.comtemplate <class OS> 244213568Sbrandon.potter@amd.comSyscallReturn 244313568Sbrandon.potter@amd.comsocketpairFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 244413568Sbrandon.potter@amd.com{ 244513568Sbrandon.potter@amd.com int index = 0; 244613568Sbrandon.potter@amd.com int domain = p->getSyscallArg(tc, index); 244713568Sbrandon.potter@amd.com int type = p->getSyscallArg(tc, index); 244813568Sbrandon.potter@amd.com int prot = p->getSyscallArg(tc, index); 244913568Sbrandon.potter@amd.com Addr svPtr = p->getSyscallArg(tc, index); 245013568Sbrandon.potter@amd.com 245113568Sbrandon.potter@amd.com BufferArg svBuf((Addr)svPtr, 2 * sizeof(int)); 245213568Sbrandon.potter@amd.com int status = socketpair(domain, type, prot, (int *)svBuf.bufferPtr()); 245313568Sbrandon.potter@amd.com if (status == -1) 245413568Sbrandon.potter@amd.com return -errno; 245513568Sbrandon.potter@amd.com 245613568Sbrandon.potter@amd.com int *fds = (int *)svBuf.bufferPtr(); 245713568Sbrandon.potter@amd.com 245813568Sbrandon.potter@amd.com auto sfdp1 = std::make_shared<SocketFDEntry>(fds[0], domain, type, prot); 245913568Sbrandon.potter@amd.com fds[0] = p->fds->allocFD(sfdp1); 246013568Sbrandon.potter@amd.com auto sfdp2 = std::make_shared<SocketFDEntry>(fds[1], domain, type, prot); 246113568Sbrandon.potter@amd.com fds[1] = p->fds->allocFD(sfdp2); 246213568Sbrandon.potter@amd.com svBuf.copyOut(tc->getMemProxy()); 246313568Sbrandon.potter@amd.com 246413568Sbrandon.potter@amd.com return status; 246513568Sbrandon.potter@amd.com} 24662553SN/A 246713570Sbrandon.potter@amd.comtemplate <class OS> 246813570Sbrandon.potter@amd.comSyscallReturn 246913570Sbrandon.potter@amd.comselectFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 247013570Sbrandon.potter@amd.com{ 247113570Sbrandon.potter@amd.com int retval; 247213570Sbrandon.potter@amd.com 247313570Sbrandon.potter@amd.com int index = 0; 247413570Sbrandon.potter@amd.com int nfds_t = p->getSyscallArg(tc, index); 247513570Sbrandon.potter@amd.com Addr fds_read_ptr = p->getSyscallArg(tc, index); 247613570Sbrandon.potter@amd.com Addr fds_writ_ptr = p->getSyscallArg(tc, index); 247713570Sbrandon.potter@amd.com Addr fds_excp_ptr = p->getSyscallArg(tc, index); 247813570Sbrandon.potter@amd.com Addr time_val_ptr = p->getSyscallArg(tc, index); 247913570Sbrandon.potter@amd.com 248013570Sbrandon.potter@amd.com TypedBufferArg<typename OS::fd_set> rd_t(fds_read_ptr); 248113570Sbrandon.potter@amd.com TypedBufferArg<typename OS::fd_set> wr_t(fds_writ_ptr); 248213570Sbrandon.potter@amd.com TypedBufferArg<typename OS::fd_set> ex_t(fds_excp_ptr); 248313570Sbrandon.potter@amd.com TypedBufferArg<typename OS::timeval> tp(time_val_ptr); 248413570Sbrandon.potter@amd.com 248513570Sbrandon.potter@amd.com /** 248613570Sbrandon.potter@amd.com * Host fields. Notice that these use the definitions from the system 248713570Sbrandon.potter@amd.com * headers instead of the gem5 headers and libraries. If the host and 248813570Sbrandon.potter@amd.com * target have different header file definitions, this will not work. 248913570Sbrandon.potter@amd.com */ 249013570Sbrandon.potter@amd.com fd_set rd_h; 249113570Sbrandon.potter@amd.com FD_ZERO(&rd_h); 249213570Sbrandon.potter@amd.com fd_set wr_h; 249313570Sbrandon.potter@amd.com FD_ZERO(&wr_h); 249413570Sbrandon.potter@amd.com fd_set ex_h; 249513570Sbrandon.potter@amd.com FD_ZERO(&ex_h); 249613570Sbrandon.potter@amd.com 249713570Sbrandon.potter@amd.com /** 249813570Sbrandon.potter@amd.com * Copy in the fd_set from the target. 249913570Sbrandon.potter@amd.com */ 250013570Sbrandon.potter@amd.com if (fds_read_ptr) 250113570Sbrandon.potter@amd.com rd_t.copyIn(tc->getMemProxy()); 250213570Sbrandon.potter@amd.com if (fds_writ_ptr) 250313570Sbrandon.potter@amd.com wr_t.copyIn(tc->getMemProxy()); 250413570Sbrandon.potter@amd.com if (fds_excp_ptr) 250513570Sbrandon.potter@amd.com ex_t.copyIn(tc->getMemProxy()); 250613570Sbrandon.potter@amd.com 250713570Sbrandon.potter@amd.com /** 250813570Sbrandon.potter@amd.com * We need to translate the target file descriptor set into a host file 250913570Sbrandon.potter@amd.com * descriptor set. This involves both our internal process fd array 251013570Sbrandon.potter@amd.com * and the fd_set defined in Linux header files. The nfds field also 251113570Sbrandon.potter@amd.com * needs to be updated as it will be only target specific after 251213570Sbrandon.potter@amd.com * retrieving it from the target; the nfds value is expected to be the 251313570Sbrandon.potter@amd.com * highest file descriptor that needs to be checked, so we need to extend 251413570Sbrandon.potter@amd.com * it out for nfds_h when we do the update. 251513570Sbrandon.potter@amd.com */ 251613570Sbrandon.potter@amd.com int nfds_h = 0; 251713570Sbrandon.potter@amd.com std::map<int, int> trans_map; 251813570Sbrandon.potter@amd.com auto try_add_host_set = [&](fd_set *tgt_set_entry, 251913570Sbrandon.potter@amd.com fd_set *hst_set_entry, 252013570Sbrandon.potter@amd.com int iter) -> bool 252113570Sbrandon.potter@amd.com { 252213570Sbrandon.potter@amd.com /** 252313570Sbrandon.potter@amd.com * By this point, we know that we are looking at a valid file 252413570Sbrandon.potter@amd.com * descriptor set on the target. We need to check if the target file 252513570Sbrandon.potter@amd.com * descriptor value passed in as iter is part of the set. 252613570Sbrandon.potter@amd.com */ 252713570Sbrandon.potter@amd.com if (FD_ISSET(iter, tgt_set_entry)) { 252813570Sbrandon.potter@amd.com /** 252913570Sbrandon.potter@amd.com * We know that the target file descriptor belongs to the set, 253013570Sbrandon.potter@amd.com * but we do not yet know if the file descriptor is valid or 253113570Sbrandon.potter@amd.com * that we have a host mapping. Check that now. 253213570Sbrandon.potter@amd.com */ 253313570Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[iter]); 253413570Sbrandon.potter@amd.com if (!hbfdp) 253513570Sbrandon.potter@amd.com return true; 253613570Sbrandon.potter@amd.com auto sim_fd = hbfdp->getSimFD(); 253713570Sbrandon.potter@amd.com 253813570Sbrandon.potter@amd.com /** 253913570Sbrandon.potter@amd.com * Add the sim_fd to tgt_fd translation into trans_map for use 254013570Sbrandon.potter@amd.com * later when we need to zero the target fd_set structures and 254113570Sbrandon.potter@amd.com * then update them with hits returned from the host select call. 254213570Sbrandon.potter@amd.com */ 254313570Sbrandon.potter@amd.com trans_map[sim_fd] = iter; 254413570Sbrandon.potter@amd.com 254513570Sbrandon.potter@amd.com /** 254613570Sbrandon.potter@amd.com * We know that the host file descriptor exists so now we check 254713570Sbrandon.potter@amd.com * if we need to update the max count for nfds_h before passing 254813570Sbrandon.potter@amd.com * the duplicated structure into the host. 254913570Sbrandon.potter@amd.com */ 255013570Sbrandon.potter@amd.com nfds_h = std::max(nfds_h - 1, sim_fd + 1); 255113570Sbrandon.potter@amd.com 255213570Sbrandon.potter@amd.com /** 255313570Sbrandon.potter@amd.com * Add the host file descriptor to the set that we are going to 255413570Sbrandon.potter@amd.com * pass into the host. 255513570Sbrandon.potter@amd.com */ 255613570Sbrandon.potter@amd.com FD_SET(sim_fd, hst_set_entry); 255713570Sbrandon.potter@amd.com } 255813570Sbrandon.potter@amd.com return false; 255913570Sbrandon.potter@amd.com }; 256013570Sbrandon.potter@amd.com 256113570Sbrandon.potter@amd.com for (int i = 0; i < nfds_t; i++) { 256213570Sbrandon.potter@amd.com if (fds_read_ptr) { 256313570Sbrandon.potter@amd.com bool ebadf = try_add_host_set((fd_set*)&*rd_t, &rd_h, i); 256413570Sbrandon.potter@amd.com if (ebadf) return -EBADF; 256513570Sbrandon.potter@amd.com } 256613570Sbrandon.potter@amd.com if (fds_writ_ptr) { 256713570Sbrandon.potter@amd.com bool ebadf = try_add_host_set((fd_set*)&*wr_t, &wr_h, i); 256813570Sbrandon.potter@amd.com if (ebadf) return -EBADF; 256913570Sbrandon.potter@amd.com } 257013570Sbrandon.potter@amd.com if (fds_excp_ptr) { 257113570Sbrandon.potter@amd.com bool ebadf = try_add_host_set((fd_set*)&*ex_t, &ex_h, i); 257213570Sbrandon.potter@amd.com if (ebadf) return -EBADF; 257313570Sbrandon.potter@amd.com } 257413570Sbrandon.potter@amd.com } 257513570Sbrandon.potter@amd.com 257613570Sbrandon.potter@amd.com if (time_val_ptr) { 257713570Sbrandon.potter@amd.com /** 257813570Sbrandon.potter@amd.com * It might be possible to decrement the timeval based on some 257913570Sbrandon.potter@amd.com * derivation of wall clock determined from elapsed simulator ticks 258013570Sbrandon.potter@amd.com * but that seems like overkill. Rather, we just set the timeval with 258113570Sbrandon.potter@amd.com * zero timeout. (There is no reason to block during the simulation 258213570Sbrandon.potter@amd.com * as it only decreases simulator performance.) 258313570Sbrandon.potter@amd.com */ 258413570Sbrandon.potter@amd.com tp->tv_sec = 0; 258513570Sbrandon.potter@amd.com tp->tv_usec = 0; 258613570Sbrandon.potter@amd.com 258713570Sbrandon.potter@amd.com retval = select(nfds_h, 258813570Sbrandon.potter@amd.com fds_read_ptr ? &rd_h : nullptr, 258913570Sbrandon.potter@amd.com fds_writ_ptr ? &wr_h : nullptr, 259013570Sbrandon.potter@amd.com fds_excp_ptr ? &ex_h : nullptr, 259113570Sbrandon.potter@amd.com (timeval*)&*tp); 259213570Sbrandon.potter@amd.com } else { 259313570Sbrandon.potter@amd.com /** 259413570Sbrandon.potter@amd.com * If the timeval pointer is null, setup a new timeval structure to 259513570Sbrandon.potter@amd.com * pass into the host select call. Unfortunately, we will need to 259613570Sbrandon.potter@amd.com * manually check the return value and throw a retry fault if the 259713570Sbrandon.potter@amd.com * return value is zero. Allowing the system call to block will 259813570Sbrandon.potter@amd.com * likely deadlock the event queue. 259913570Sbrandon.potter@amd.com */ 260013570Sbrandon.potter@amd.com struct timeval tv = { 0, 0 }; 260113570Sbrandon.potter@amd.com 260213570Sbrandon.potter@amd.com retval = select(nfds_h, 260313570Sbrandon.potter@amd.com fds_read_ptr ? &rd_h : nullptr, 260413570Sbrandon.potter@amd.com fds_writ_ptr ? &wr_h : nullptr, 260513570Sbrandon.potter@amd.com fds_excp_ptr ? &ex_h : nullptr, 260613570Sbrandon.potter@amd.com &tv); 260713570Sbrandon.potter@amd.com 260813570Sbrandon.potter@amd.com if (retval == 0) { 260913570Sbrandon.potter@amd.com /** 261013570Sbrandon.potter@amd.com * If blocking indefinitely, check the signal list to see if a 261113570Sbrandon.potter@amd.com * signal would break the poll out of the retry cycle and try to 261213570Sbrandon.potter@amd.com * return the signal interrupt instead. 261313570Sbrandon.potter@amd.com */ 261413570Sbrandon.potter@amd.com for (auto sig : tc->getSystemPtr()->signalList) 261513570Sbrandon.potter@amd.com if (sig.receiver == p) 261613570Sbrandon.potter@amd.com return -EINTR; 261713570Sbrandon.potter@amd.com return SyscallReturn::retry(); 261813570Sbrandon.potter@amd.com } 261913570Sbrandon.potter@amd.com } 262013570Sbrandon.potter@amd.com 262113570Sbrandon.potter@amd.com if (retval == -1) 262213570Sbrandon.potter@amd.com return -errno; 262313570Sbrandon.potter@amd.com 262413570Sbrandon.potter@amd.com FD_ZERO((fd_set*)&*rd_t); 262513570Sbrandon.potter@amd.com FD_ZERO((fd_set*)&*wr_t); 262613570Sbrandon.potter@amd.com FD_ZERO((fd_set*)&*ex_t); 262713570Sbrandon.potter@amd.com 262813570Sbrandon.potter@amd.com /** 262913570Sbrandon.potter@amd.com * We need to translate the host file descriptor set into a target file 263013570Sbrandon.potter@amd.com * descriptor set. This involves both our internal process fd array 263113570Sbrandon.potter@amd.com * and the fd_set defined in header files. 263213570Sbrandon.potter@amd.com */ 263313570Sbrandon.potter@amd.com for (int i = 0; i < nfds_h; i++) { 263413570Sbrandon.potter@amd.com if (fds_read_ptr) { 263513570Sbrandon.potter@amd.com if (FD_ISSET(i, &rd_h)) 263613570Sbrandon.potter@amd.com FD_SET(trans_map[i], (fd_set*)&*rd_t); 263713570Sbrandon.potter@amd.com } 263813570Sbrandon.potter@amd.com 263913570Sbrandon.potter@amd.com if (fds_writ_ptr) { 264013570Sbrandon.potter@amd.com if (FD_ISSET(i, &wr_h)) 264113570Sbrandon.potter@amd.com FD_SET(trans_map[i], (fd_set*)&*wr_t); 264213570Sbrandon.potter@amd.com } 264313570Sbrandon.potter@amd.com 264413570Sbrandon.potter@amd.com if (fds_excp_ptr) { 264513570Sbrandon.potter@amd.com if (FD_ISSET(i, &ex_h)) 264613570Sbrandon.potter@amd.com FD_SET(trans_map[i], (fd_set*)&*ex_t); 264713570Sbrandon.potter@amd.com } 264813570Sbrandon.potter@amd.com } 264913570Sbrandon.potter@amd.com 265013570Sbrandon.potter@amd.com if (fds_read_ptr) 265113570Sbrandon.potter@amd.com rd_t.copyOut(tc->getMemProxy()); 265213570Sbrandon.potter@amd.com if (fds_writ_ptr) 265313570Sbrandon.potter@amd.com wr_t.copyOut(tc->getMemProxy()); 265413570Sbrandon.potter@amd.com if (fds_excp_ptr) 265513570Sbrandon.potter@amd.com ex_t.copyOut(tc->getMemProxy()); 265613570Sbrandon.potter@amd.com if (time_val_ptr) 265713570Sbrandon.potter@amd.com tp.copyOut(tc->getMemProxy()); 265813570Sbrandon.potter@amd.com 265913570Sbrandon.potter@amd.com return retval; 266013570Sbrandon.potter@amd.com} 266113570Sbrandon.potter@amd.com 266213570Sbrandon.potter@amd.comtemplate <class OS> 266313570Sbrandon.potter@amd.comSyscallReturn 266413570Sbrandon.potter@amd.comreadFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 266513570Sbrandon.potter@amd.com{ 266613570Sbrandon.potter@amd.com int index = 0; 266713570Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 266813570Sbrandon.potter@amd.com Addr buf_ptr = p->getSyscallArg(tc, index); 266913570Sbrandon.potter@amd.com int nbytes = p->getSyscallArg(tc, index); 267013570Sbrandon.potter@amd.com 267113570Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 267213570Sbrandon.potter@amd.com if (!hbfdp) 267313570Sbrandon.potter@amd.com return -EBADF; 267413570Sbrandon.potter@amd.com int sim_fd = hbfdp->getSimFD(); 267513570Sbrandon.potter@amd.com 267613570Sbrandon.potter@amd.com struct pollfd pfd; 267713570Sbrandon.potter@amd.com pfd.fd = sim_fd; 267813570Sbrandon.potter@amd.com pfd.events = POLLIN | POLLPRI; 267913570Sbrandon.potter@amd.com if ((poll(&pfd, 1, 0) == 0) 268013570Sbrandon.potter@amd.com && !(hbfdp->getFlags() & OS::TGT_O_NONBLOCK)) 268113570Sbrandon.potter@amd.com return SyscallReturn::retry(); 268213570Sbrandon.potter@amd.com 268313570Sbrandon.potter@amd.com BufferArg buf_arg(buf_ptr, nbytes); 268413570Sbrandon.potter@amd.com int bytes_read = read(sim_fd, buf_arg.bufferPtr(), nbytes); 268513570Sbrandon.potter@amd.com 268613570Sbrandon.potter@amd.com if (bytes_read > 0) 268713570Sbrandon.potter@amd.com buf_arg.copyOut(tc->getMemProxy()); 268813570Sbrandon.potter@amd.com 268913570Sbrandon.potter@amd.com return (bytes_read == -1) ? -errno : bytes_read; 269013570Sbrandon.potter@amd.com} 269113570Sbrandon.potter@amd.com 269213570Sbrandon.potter@amd.comtemplate <class OS> 269313570Sbrandon.potter@amd.comSyscallReturn 269413570Sbrandon.potter@amd.comwriteFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 269513570Sbrandon.potter@amd.com{ 269613570Sbrandon.potter@amd.com int index = 0; 269713570Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 269813570Sbrandon.potter@amd.com Addr buf_ptr = p->getSyscallArg(tc, index); 269913570Sbrandon.potter@amd.com int nbytes = p->getSyscallArg(tc, index); 270013570Sbrandon.potter@amd.com 270113570Sbrandon.potter@amd.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 270213570Sbrandon.potter@amd.com if (!hbfdp) 270313570Sbrandon.potter@amd.com return -EBADF; 270413570Sbrandon.potter@amd.com int sim_fd = hbfdp->getSimFD(); 270513570Sbrandon.potter@amd.com 270613570Sbrandon.potter@amd.com BufferArg buf_arg(buf_ptr, nbytes); 270713570Sbrandon.potter@amd.com buf_arg.copyIn(tc->getMemProxy()); 270813570Sbrandon.potter@amd.com 270913570Sbrandon.potter@amd.com struct pollfd pfd; 271013570Sbrandon.potter@amd.com pfd.fd = sim_fd; 271113570Sbrandon.potter@amd.com pfd.events = POLLOUT; 271213570Sbrandon.potter@amd.com 271313570Sbrandon.potter@amd.com /** 271413570Sbrandon.potter@amd.com * We don't want to poll on /dev/random. The kernel will not enable the 271513570Sbrandon.potter@amd.com * file descriptor for writing unless the entropy in the system falls 271613570Sbrandon.potter@amd.com * below write_wakeup_threshold. This is not guaranteed to happen 271713570Sbrandon.potter@amd.com * depending on host settings. 271813570Sbrandon.potter@amd.com */ 271913570Sbrandon.potter@amd.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(hbfdp); 272013570Sbrandon.potter@amd.com if (ffdp && (ffdp->getFileName() != "/dev/random")) { 272113570Sbrandon.potter@amd.com if (!poll(&pfd, 1, 0) && !(ffdp->getFlags() & OS::TGT_O_NONBLOCK)) 272213570Sbrandon.potter@amd.com return SyscallReturn::retry(); 272313570Sbrandon.potter@amd.com } 272413570Sbrandon.potter@amd.com 272513570Sbrandon.potter@amd.com int bytes_written = write(sim_fd, buf_arg.bufferPtr(), nbytes); 272613570Sbrandon.potter@amd.com 272713570Sbrandon.potter@amd.com if (bytes_written != -1) 272813570Sbrandon.potter@amd.com fsync(sim_fd); 272913570Sbrandon.potter@amd.com 273013570Sbrandon.potter@amd.com return (bytes_written == -1) ? -errno : bytes_written; 273113570Sbrandon.potter@amd.com} 273213570Sbrandon.potter@amd.com 273313570Sbrandon.potter@amd.comtemplate <class OS> 273413570Sbrandon.potter@amd.comSyscallReturn 273513570Sbrandon.potter@amd.comwait4Func(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 273613570Sbrandon.potter@amd.com{ 273713570Sbrandon.potter@amd.com int index = 0; 273813570Sbrandon.potter@amd.com pid_t pid = p->getSyscallArg(tc, index); 273913570Sbrandon.potter@amd.com Addr statPtr = p->getSyscallArg(tc, index); 274013570Sbrandon.potter@amd.com int options = p->getSyscallArg(tc, index); 274113570Sbrandon.potter@amd.com Addr rusagePtr = p->getSyscallArg(tc, index); 274213570Sbrandon.potter@amd.com 274313570Sbrandon.potter@amd.com if (rusagePtr) 274413570Sbrandon.potter@amd.com DPRINTFR(SyscallVerbose, 274513570Sbrandon.potter@amd.com "%d: %s: syscall wait4: rusage pointer provided however " 274613570Sbrandon.potter@amd.com "functionality not supported. Ignoring rusage pointer.\n", 274713570Sbrandon.potter@amd.com curTick(), tc->getCpuPtr()->name()); 274813570Sbrandon.potter@amd.com 274913570Sbrandon.potter@amd.com /** 275013570Sbrandon.potter@amd.com * Currently, wait4 is only implemented so that it will wait for children 275113570Sbrandon.potter@amd.com * exit conditions which are denoted by a SIGCHLD signals posted into the 275213570Sbrandon.potter@amd.com * system signal list. We return no additional information via any of the 275313570Sbrandon.potter@amd.com * parameters supplied to wait4. If nothing is found in the system signal 275413570Sbrandon.potter@amd.com * list, we will wait indefinitely for SIGCHLD to post by retrying the 275513570Sbrandon.potter@amd.com * call. 275613570Sbrandon.potter@amd.com */ 275713570Sbrandon.potter@amd.com System *sysh = tc->getSystemPtr(); 275813570Sbrandon.potter@amd.com std::list<BasicSignal>::iterator iter; 275913570Sbrandon.potter@amd.com for (iter=sysh->signalList.begin(); iter!=sysh->signalList.end(); iter++) { 276013570Sbrandon.potter@amd.com if (iter->receiver == p) { 276113570Sbrandon.potter@amd.com if (pid < -1) { 276213570Sbrandon.potter@amd.com if ((iter->sender->pgid() == -pid) 276313570Sbrandon.potter@amd.com && (iter->signalValue == OS::TGT_SIGCHLD)) 276413570Sbrandon.potter@amd.com goto success; 276513570Sbrandon.potter@amd.com } else if (pid == -1) { 276613570Sbrandon.potter@amd.com if (iter->signalValue == OS::TGT_SIGCHLD) 276713570Sbrandon.potter@amd.com goto success; 276813570Sbrandon.potter@amd.com } else if (pid == 0) { 276913570Sbrandon.potter@amd.com if ((iter->sender->pgid() == p->pgid()) 277013570Sbrandon.potter@amd.com && (iter->signalValue == OS::TGT_SIGCHLD)) 277113570Sbrandon.potter@amd.com goto success; 277213570Sbrandon.potter@amd.com } else { 277313570Sbrandon.potter@amd.com if ((iter->sender->pid() == pid) 277413570Sbrandon.potter@amd.com && (iter->signalValue == OS::TGT_SIGCHLD)) 277513570Sbrandon.potter@amd.com goto success; 277613570Sbrandon.potter@amd.com } 277713570Sbrandon.potter@amd.com } 277813570Sbrandon.potter@amd.com } 277913570Sbrandon.potter@amd.com 278013570Sbrandon.potter@amd.com return (options & OS::TGT_WNOHANG) ? 0 : SyscallReturn::retry(); 278113570Sbrandon.potter@amd.com 278213570Sbrandon.potter@amd.comsuccess: 278313570Sbrandon.potter@amd.com // Set status to EXITED for WIFEXITED evaluations. 278413570Sbrandon.potter@amd.com const int EXITED = 0; 278513570Sbrandon.potter@amd.com BufferArg statusBuf(statPtr, sizeof(int)); 278613570Sbrandon.potter@amd.com *(int *)statusBuf.bufferPtr() = EXITED; 278713570Sbrandon.potter@amd.com statusBuf.copyOut(tc->getMemProxy()); 278813570Sbrandon.potter@amd.com 278913570Sbrandon.potter@amd.com // Return the child PID. 279013570Sbrandon.potter@amd.com pid_t retval = iter->sender->pid(); 279113570Sbrandon.potter@amd.com sysh->signalList.erase(iter); 279213570Sbrandon.potter@amd.com return retval; 279313570Sbrandon.potter@amd.com} 279413570Sbrandon.potter@amd.com 279513570Sbrandon.potter@amd.comtemplate <class OS> 279613570Sbrandon.potter@amd.comSyscallReturn 279713570Sbrandon.potter@amd.comacceptFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 279813570Sbrandon.potter@amd.com{ 279913570Sbrandon.potter@amd.com struct sockaddr sa; 280013570Sbrandon.potter@amd.com socklen_t addrLen; 280113570Sbrandon.potter@amd.com int host_fd; 280213570Sbrandon.potter@amd.com int index = 0; 280313570Sbrandon.potter@amd.com int tgt_fd = p->getSyscallArg(tc, index); 280413570Sbrandon.potter@amd.com Addr addrPtr = p->getSyscallArg(tc, index); 280513570Sbrandon.potter@amd.com Addr lenPtr = p->getSyscallArg(tc, index); 280613570Sbrandon.potter@amd.com 280713570Sbrandon.potter@amd.com BufferArg *lenBufPtr = nullptr; 280813570Sbrandon.potter@amd.com BufferArg *addrBufPtr = nullptr; 280913570Sbrandon.potter@amd.com 281013570Sbrandon.potter@amd.com auto sfdp = std::dynamic_pointer_cast<SocketFDEntry>((*p->fds)[tgt_fd]); 281113570Sbrandon.potter@amd.com if (!sfdp) 281213570Sbrandon.potter@amd.com return -EBADF; 281313570Sbrandon.potter@amd.com int sim_fd = sfdp->getSimFD(); 281413570Sbrandon.potter@amd.com 281513570Sbrandon.potter@amd.com /** 281613570Sbrandon.potter@amd.com * We poll the socket file descriptor first to guarantee that we do not 281713570Sbrandon.potter@amd.com * block on our accept call. The socket can be opened without the 281813570Sbrandon.potter@amd.com * non-blocking flag (it blocks). This will cause deadlocks between 281913570Sbrandon.potter@amd.com * communicating processes. 282013570Sbrandon.potter@amd.com */ 282113570Sbrandon.potter@amd.com struct pollfd pfd; 282213570Sbrandon.potter@amd.com pfd.fd = sim_fd; 282313570Sbrandon.potter@amd.com pfd.events = POLLIN | POLLPRI; 282413570Sbrandon.potter@amd.com if ((poll(&pfd, 1, 0) == 0) 282513570Sbrandon.potter@amd.com && !(sfdp->getFlags() & OS::TGT_O_NONBLOCK)) 282613570Sbrandon.potter@amd.com return SyscallReturn::retry(); 282713570Sbrandon.potter@amd.com 282813570Sbrandon.potter@amd.com if (lenPtr) { 282913570Sbrandon.potter@amd.com lenBufPtr = new BufferArg(lenPtr, sizeof(socklen_t)); 283013570Sbrandon.potter@amd.com lenBufPtr->copyIn(tc->getMemProxy()); 283113570Sbrandon.potter@amd.com memcpy(&addrLen, (socklen_t *)lenBufPtr->bufferPtr(), 283213570Sbrandon.potter@amd.com sizeof(socklen_t)); 283313570Sbrandon.potter@amd.com } 283413570Sbrandon.potter@amd.com 283513570Sbrandon.potter@amd.com if (addrPtr) { 283613570Sbrandon.potter@amd.com addrBufPtr = new BufferArg(addrPtr, sizeof(struct sockaddr)); 283713570Sbrandon.potter@amd.com addrBufPtr->copyIn(tc->getMemProxy()); 283813570Sbrandon.potter@amd.com memcpy(&sa, (struct sockaddr *)addrBufPtr->bufferPtr(), 283913570Sbrandon.potter@amd.com sizeof(struct sockaddr)); 284013570Sbrandon.potter@amd.com } 284113570Sbrandon.potter@amd.com 284213570Sbrandon.potter@amd.com host_fd = accept(sim_fd, &sa, &addrLen); 284313570Sbrandon.potter@amd.com 284413570Sbrandon.potter@amd.com if (host_fd == -1) 284513570Sbrandon.potter@amd.com return -errno; 284613570Sbrandon.potter@amd.com 284713570Sbrandon.potter@amd.com if (addrPtr) { 284813570Sbrandon.potter@amd.com memcpy(addrBufPtr->bufferPtr(), &sa, sizeof(sa)); 284913570Sbrandon.potter@amd.com addrBufPtr->copyOut(tc->getMemProxy()); 285013570Sbrandon.potter@amd.com delete(addrBufPtr); 285113570Sbrandon.potter@amd.com } 285213570Sbrandon.potter@amd.com 285313570Sbrandon.potter@amd.com if (lenPtr) { 285413570Sbrandon.potter@amd.com *(socklen_t *)lenBufPtr->bufferPtr() = addrLen; 285513570Sbrandon.potter@amd.com lenBufPtr->copyOut(tc->getMemProxy()); 285613570Sbrandon.potter@amd.com delete(lenBufPtr); 285713570Sbrandon.potter@amd.com } 285813570Sbrandon.potter@amd.com 285913570Sbrandon.potter@amd.com auto afdp = std::make_shared<SocketFDEntry>(host_fd, sfdp->_domain, 286013570Sbrandon.potter@amd.com sfdp->_type, sfdp->_protocol); 286113570Sbrandon.potter@amd.com return p->fds->allocFD(afdp); 286213570Sbrandon.potter@amd.com} 286313570Sbrandon.potter@amd.com 28641354SN/A#endif // __SIM_SYSCALL_EMUL_HH__ 2865