syscall_emul.hh revision 13629
19651SAndreas.Sandberg@ARM.com/* 210858Sandreas.sandberg@arm.com * Copyright (c) 2012-2013, 2015 ARM Limited 39651SAndreas.Sandberg@ARM.com * Copyright (c) 2015 Advanced Micro Devices, Inc. 49651SAndreas.Sandberg@ARM.com * All rights reserved 59651SAndreas.Sandberg@ARM.com * 69651SAndreas.Sandberg@ARM.com * The license below extends only to copyright in the software and shall 79651SAndreas.Sandberg@ARM.com * not be construed as granting a license to any other intellectual 89651SAndreas.Sandberg@ARM.com * property including but not limited to intellectual property relating 99651SAndreas.Sandberg@ARM.com * to a hardware implementation of the functionality of the software 109651SAndreas.Sandberg@ARM.com * licensed hereunder. You may use the software subject to the license 119651SAndreas.Sandberg@ARM.com * terms below provided that you ensure that this notice is replicated 129651SAndreas.Sandberg@ARM.com * unmodified and in its entirety in all distributions of the software, 139651SAndreas.Sandberg@ARM.com * modified or unmodified, in source code or in binary form. 149651SAndreas.Sandberg@ARM.com * 159651SAndreas.Sandberg@ARM.com * Copyright (c) 2003-2005 The Regents of The University of Michigan 169651SAndreas.Sandberg@ARM.com * All rights reserved. 179651SAndreas.Sandberg@ARM.com * 189651SAndreas.Sandberg@ARM.com * Redistribution and use in source and binary forms, with or without 199651SAndreas.Sandberg@ARM.com * modification, are permitted provided that the following conditions are 209651SAndreas.Sandberg@ARM.com * met: redistributions of source code must retain the above copyright 219651SAndreas.Sandberg@ARM.com * notice, this list of conditions and the following disclaimer; 229651SAndreas.Sandberg@ARM.com * redistributions in binary form must reproduce the above copyright 239651SAndreas.Sandberg@ARM.com * notice, this list of conditions and the following disclaimer in the 249651SAndreas.Sandberg@ARM.com * documentation and/or other materials provided with the distribution; 259651SAndreas.Sandberg@ARM.com * neither the name of the copyright holders nor the names of its 269651SAndreas.Sandberg@ARM.com * contributors may be used to endorse or promote products derived from 279651SAndreas.Sandberg@ARM.com * this software without specific prior written permission. 289651SAndreas.Sandberg@ARM.com * 299651SAndreas.Sandberg@ARM.com * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 309651SAndreas.Sandberg@ARM.com * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 319651SAndreas.Sandberg@ARM.com * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 329651SAndreas.Sandberg@ARM.com * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 339651SAndreas.Sandberg@ARM.com * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 349651SAndreas.Sandberg@ARM.com * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 359651SAndreas.Sandberg@ARM.com * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 369651SAndreas.Sandberg@ARM.com * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 379651SAndreas.Sandberg@ARM.com * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 389651SAndreas.Sandberg@ARM.com * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 399651SAndreas.Sandberg@ARM.com * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 409651SAndreas.Sandberg@ARM.com * 419651SAndreas.Sandberg@ARM.com * Authors: Steve Reinhardt 429651SAndreas.Sandberg@ARM.com * Kevin Lim 439651SAndreas.Sandberg@ARM.com */ 449651SAndreas.Sandberg@ARM.com 459651SAndreas.Sandberg@ARM.com#ifndef __SIM_SYSCALL_EMUL_HH__ 469651SAndreas.Sandberg@ARM.com#define __SIM_SYSCALL_EMUL_HH__ 479651SAndreas.Sandberg@ARM.com 489651SAndreas.Sandberg@ARM.com#if (defined(__APPLE__) || defined(__OpenBSD__) || \ 499760Sandreas@sandberg.pp.se defined(__FreeBSD__) || defined(__CYGWIN__) || \ 509651SAndreas.Sandberg@ARM.com defined(__NetBSD__)) 519651SAndreas.Sandberg@ARM.com#define NO_STAT64 1 529683Sandreas@sandberg.pp.se#else 539753Sandreas@sandberg.pp.se#define NO_STAT64 0 549651SAndreas.Sandberg@ARM.com#endif 559651SAndreas.Sandberg@ARM.com 569651SAndreas.Sandberg@ARM.com#if (defined(__APPLE__) || defined(__OpenBSD__) || \ 579651SAndreas.Sandberg@ARM.com defined(__FreeBSD__) || defined(__NetBSD__)) 589651SAndreas.Sandberg@ARM.com#define NO_STATFS 1 599651SAndreas.Sandberg@ARM.com#else 609651SAndreas.Sandberg@ARM.com#define NO_STATFS 0 619753Sandreas@sandberg.pp.se#endif 629753Sandreas@sandberg.pp.se 639651SAndreas.Sandberg@ARM.com#if (defined(__APPLE__) || defined(__OpenBSD__) || \ 649651SAndreas.Sandberg@ARM.com defined(__FreeBSD__) || defined(__NetBSD__)) 659651SAndreas.Sandberg@ARM.com#define NO_FALLOCATE 1 669651SAndreas.Sandberg@ARM.com#else 679651SAndreas.Sandberg@ARM.com#define NO_FALLOCATE 0 689651SAndreas.Sandberg@ARM.com#endif 699651SAndreas.Sandberg@ARM.com 709651SAndreas.Sandberg@ARM.com/// 719651SAndreas.Sandberg@ARM.com/// @file syscall_emul.hh 729652SAndreas.Sandberg@ARM.com/// 739652SAndreas.Sandberg@ARM.com/// This file defines objects used to emulate syscalls from the target 749651SAndreas.Sandberg@ARM.com/// application on the host machine. 759651SAndreas.Sandberg@ARM.com 769651SAndreas.Sandberg@ARM.com#ifdef __CYGWIN32__ 779651SAndreas.Sandberg@ARM.com#include <sys/fcntl.h> 789892Sandreas@sandberg.pp.se 799655SAndreas.Sandberg@ARM.com#endif 809752Sandreas@sandberg.pp.se#include <fcntl.h> 819752Sandreas@sandberg.pp.se#include <poll.h> 829651SAndreas.Sandberg@ARM.com#include <sys/mman.h> 839651SAndreas.Sandberg@ARM.com#include <sys/socket.h> 849651SAndreas.Sandberg@ARM.com#include <sys/stat.h> 859651SAndreas.Sandberg@ARM.com#if (NO_STATFS == 0) 869651SAndreas.Sandberg@ARM.com#include <sys/statfs.h> 8710553Salexandru.dutu@amd.com#else 8810553Salexandru.dutu@amd.com#include <sys/mount.h> 8910553Salexandru.dutu@amd.com#endif 9010553Salexandru.dutu@amd.com#include <sys/time.h> 9110553Salexandru.dutu@amd.com#include <sys/types.h> 9210553Salexandru.dutu@amd.com#include <sys/uio.h> 9310553Salexandru.dutu@amd.com#include <unistd.h> 9410553Salexandru.dutu@amd.com 959651SAndreas.Sandberg@ARM.com#include <cerrno> 969651SAndreas.Sandberg@ARM.com#include <memory> 979651SAndreas.Sandberg@ARM.com#include <string> 989651SAndreas.Sandberg@ARM.com 999651SAndreas.Sandberg@ARM.com#include "arch/generic/tlb.hh" 1009651SAndreas.Sandberg@ARM.com#include "arch/utility.hh" 1019651SAndreas.Sandberg@ARM.com#include "base/intmath.hh" 1029651SAndreas.Sandberg@ARM.com#include "base/loader/object_file.hh" 1039651SAndreas.Sandberg@ARM.com#include "base/logging.hh" 1049651SAndreas.Sandberg@ARM.com#include "base/trace.hh" 1059651SAndreas.Sandberg@ARM.com#include "base/types.hh" 1069651SAndreas.Sandberg@ARM.com#include "config/the_isa.hh" 1079651SAndreas.Sandberg@ARM.com#include "cpu/base.hh" 1089651SAndreas.Sandberg@ARM.com#include "cpu/thread_context.hh" 1099651SAndreas.Sandberg@ARM.com#include "mem/page_table.hh" 1109651SAndreas.Sandberg@ARM.com#include "params/Process.hh" 1119651SAndreas.Sandberg@ARM.com#include "sim/emul_driver.hh" 1129651SAndreas.Sandberg@ARM.com#include "sim/futex_map.hh" 1139651SAndreas.Sandberg@ARM.com#include "sim/process.hh" 1149651SAndreas.Sandberg@ARM.com#include "sim/syscall_debug_macros.hh" 1159651SAndreas.Sandberg@ARM.com#include "sim/syscall_desc.hh" 1169651SAndreas.Sandberg@ARM.com#include "sim/syscall_emul_buf.hh" 1179651SAndreas.Sandberg@ARM.com#include "sim/syscall_return.hh" 1189651SAndreas.Sandberg@ARM.com 1199651SAndreas.Sandberg@ARM.com#if defined(__APPLE__) && defined(__MACH__) && !defined(CMSG_ALIGN) 1209651SAndreas.Sandberg@ARM.com#define CMSG_ALIGN(len) (((len) + sizeof(size_t) - 1) & ~(sizeof(size_t) - 1)) 1219651SAndreas.Sandberg@ARM.com#endif 1229651SAndreas.Sandberg@ARM.com 1239651SAndreas.Sandberg@ARM.com////////////////////////////////////////////////////////////////////// 1249651SAndreas.Sandberg@ARM.com// 1259690Sandreas@sandberg.pp.se// The following emulation functions are generic enough that they 1269690Sandreas@sandberg.pp.se// don't need to be recompiled for different emulated OS's. They are 1279690Sandreas@sandberg.pp.se// defined in sim/syscall_emul.cc. 12811363Sandreas@sandberg.pp.se// 1299651SAndreas.Sandberg@ARM.com////////////////////////////////////////////////////////////////////// 1309651SAndreas.Sandberg@ARM.com 1319651SAndreas.Sandberg@ARM.com 1329651SAndreas.Sandberg@ARM.com/// Handler for unimplemented syscalls that we haven't thought about. 1339651SAndreas.Sandberg@ARM.comSyscallReturn unimplementedFunc(SyscallDesc *desc, int num, 1349651SAndreas.Sandberg@ARM.com Process *p, ThreadContext *tc); 1359651SAndreas.Sandberg@ARM.com 1369651SAndreas.Sandberg@ARM.com/// Handler for unimplemented syscalls that we never intend to 1379651SAndreas.Sandberg@ARM.com/// implement (signal handling, etc.) and should not affect the correct 1389651SAndreas.Sandberg@ARM.com/// behavior of the program. Print a warning only if the appropriate 1399651SAndreas.Sandberg@ARM.com/// trace flag is enabled. Return success to the target program. 1409651SAndreas.Sandberg@ARM.comSyscallReturn ignoreFunc(SyscallDesc *desc, int num, 1419651SAndreas.Sandberg@ARM.com Process *p, ThreadContext *tc); 1429651SAndreas.Sandberg@ARM.com 1439651SAndreas.Sandberg@ARM.com// Target fallocateFunc() handler. 1449651SAndreas.Sandberg@ARM.comSyscallReturn fallocateFunc(SyscallDesc *desc, int num, 1459651SAndreas.Sandberg@ARM.com Process *p, ThreadContext *tc); 1469651SAndreas.Sandberg@ARM.com 1479651SAndreas.Sandberg@ARM.com/// Target exit() handler: terminate current context. 1489651SAndreas.Sandberg@ARM.comSyscallReturn exitFunc(SyscallDesc *desc, int num, 1499651SAndreas.Sandberg@ARM.com Process *p, ThreadContext *tc); 1509651SAndreas.Sandberg@ARM.com 1519651SAndreas.Sandberg@ARM.com/// Target exit_group() handler: terminate simulation. (exit all threads) 1529651SAndreas.Sandberg@ARM.comSyscallReturn exitGroupFunc(SyscallDesc *desc, int num, 1539651SAndreas.Sandberg@ARM.com Process *p, ThreadContext *tc); 1549690Sandreas@sandberg.pp.se 1559690Sandreas@sandberg.pp.se/// Target set_tid_address() handler. 1569690Sandreas@sandberg.pp.seSyscallReturn setTidAddressFunc(SyscallDesc *desc, int num, 1579651SAndreas.Sandberg@ARM.com Process *p, ThreadContext *tc); 1589651SAndreas.Sandberg@ARM.com 1599651SAndreas.Sandberg@ARM.com/// Target getpagesize() handler. 1609651SAndreas.Sandberg@ARM.comSyscallReturn getpagesizeFunc(SyscallDesc *desc, int num, 1619651SAndreas.Sandberg@ARM.com Process *p, ThreadContext *tc); 1629651SAndreas.Sandberg@ARM.com 1639732Sandreas@sandberg.pp.se/// Target brk() handler: set brk address. 1649732Sandreas@sandberg.pp.seSyscallReturn brkFunc(SyscallDesc *desc, int num, 16510073Sandreas@sandberg.pp.se Process *p, ThreadContext *tc); 16610073Sandreas@sandberg.pp.se 16710073Sandreas@sandberg.pp.se/// Target close() handler. 16810073Sandreas@sandberg.pp.seSyscallReturn closeFunc(SyscallDesc *desc, int num, 16910073Sandreas@sandberg.pp.se Process *p, ThreadContext *tc); 17010073Sandreas@sandberg.pp.se 17110073Sandreas@sandberg.pp.se/// Target lseek() handler. 17210073Sandreas@sandberg.pp.seSyscallReturn lseekFunc(SyscallDesc *desc, int num, 17310073Sandreas@sandberg.pp.se Process *p, ThreadContext *tc); 17410073Sandreas@sandberg.pp.se 17510073Sandreas@sandberg.pp.se/// Target _llseek() handler. 17610073Sandreas@sandberg.pp.seSyscallReturn _llseekFunc(SyscallDesc *desc, int num, 17710073Sandreas@sandberg.pp.se Process *p, ThreadContext *tc); 17810073Sandreas@sandberg.pp.se 17910073Sandreas@sandberg.pp.se/// Target munmap() handler. 18010073Sandreas@sandberg.pp.seSyscallReturn munmapFunc(SyscallDesc *desc, int num, 18110073Sandreas@sandberg.pp.se Process *p, ThreadContext *tc); 18210114Sandreas@sandberg.pp.se 18310114Sandreas@sandberg.pp.se/// Target shutdown() handler. 18410098Sandreas@sandberg.pp.seSyscallReturn shutdownFunc(SyscallDesc *desc, int num, 18510098Sandreas@sandberg.pp.se Process *p, ThreadContext *tc); 18610098Sandreas@sandberg.pp.se 18710098Sandreas@sandberg.pp.se/// Target gethostname() handler. 18810073Sandreas@sandberg.pp.seSyscallReturn gethostnameFunc(SyscallDesc *desc, int num, 18910073Sandreas@sandberg.pp.se Process *p, ThreadContext *tc); 19010073Sandreas@sandberg.pp.se 19110073Sandreas@sandberg.pp.se/// Target getcwd() handler. 19210114Sandreas@sandberg.pp.seSyscallReturn getcwdFunc(SyscallDesc *desc, int num, 19310073Sandreas@sandberg.pp.se Process *p, ThreadContext *tc); 19410073Sandreas@sandberg.pp.se 19510073Sandreas@sandberg.pp.se/// Target readlink() handler. 19610114Sandreas@sandberg.pp.seSyscallReturn readlinkFunc(SyscallDesc *desc, int num, 19710073Sandreas@sandberg.pp.se Process *p, ThreadContext *tc, 19810073Sandreas@sandberg.pp.se int index = 0); 19910073Sandreas@sandberg.pp.seSyscallReturn readlinkFunc(SyscallDesc *desc, int num, 2009651SAndreas.Sandberg@ARM.com Process *p, ThreadContext *tc); 2019651SAndreas.Sandberg@ARM.com 2029651SAndreas.Sandberg@ARM.com/// Target unlink() handler. 2039651SAndreas.Sandberg@ARM.comSyscallReturn unlinkHelper(SyscallDesc *desc, int num, 2049651SAndreas.Sandberg@ARM.com Process *p, ThreadContext *tc, 2059651SAndreas.Sandberg@ARM.com int index); 2069651SAndreas.Sandberg@ARM.comSyscallReturn unlinkFunc(SyscallDesc *desc, int num, 2079651SAndreas.Sandberg@ARM.com Process *p, ThreadContext *tc); 2089651SAndreas.Sandberg@ARM.com 2099684Sandreas@sandberg.pp.se/// Target link() handler 2109684Sandreas@sandberg.pp.seSyscallReturn linkFunc(SyscallDesc *desc, int num, Process *p, 2119684Sandreas@sandberg.pp.se ThreadContext *tc); 2129684Sandreas@sandberg.pp.se 2139684Sandreas@sandberg.pp.se/// Target symlink() handler. 2149651SAndreas.Sandberg@ARM.comSyscallReturn symlinkFunc(SyscallDesc *desc, int num, Process *p, 2159651SAndreas.Sandberg@ARM.com ThreadContext *tc); 2169651SAndreas.Sandberg@ARM.com 2179651SAndreas.Sandberg@ARM.com/// Target mkdir() handler. 2189651SAndreas.Sandberg@ARM.comSyscallReturn mkdirFunc(SyscallDesc *desc, int num, 2199755Sandreas@sandberg.pp.se Process *p, ThreadContext *tc); 2209755Sandreas@sandberg.pp.se 2219755Sandreas@sandberg.pp.se/// Target mknod() handler. 2229755Sandreas@sandberg.pp.seSyscallReturn mknodFunc(SyscallDesc *desc, int num, 2239755Sandreas@sandberg.pp.se Process *p, ThreadContext *tc); 2249755Sandreas@sandberg.pp.se 2259755Sandreas@sandberg.pp.se/// Target chdir() handler. 2269755Sandreas@sandberg.pp.seSyscallReturn chdirFunc(SyscallDesc *desc, int num, 2279755Sandreas@sandberg.pp.se Process *p, ThreadContext *tc); 2289755Sandreas@sandberg.pp.se 2299651SAndreas.Sandberg@ARM.com// Target rmdir() handler. 2309651SAndreas.Sandberg@ARM.comSyscallReturn rmdirFunc(SyscallDesc *desc, int num, 2319651SAndreas.Sandberg@ARM.com Process *p, ThreadContext *tc); 2329651SAndreas.Sandberg@ARM.com 2339651SAndreas.Sandberg@ARM.com/// Target rename() handler. 2349651SAndreas.Sandberg@ARM.comSyscallReturn renameFunc(SyscallDesc *desc, int num, 2359651SAndreas.Sandberg@ARM.com Process *p, ThreadContext *tc); 2369651SAndreas.Sandberg@ARM.com 2379651SAndreas.Sandberg@ARM.com 2389651SAndreas.Sandberg@ARM.com/// Target truncate() handler. 2399651SAndreas.Sandberg@ARM.comSyscallReturn truncateFunc(SyscallDesc *desc, int num, 2409651SAndreas.Sandberg@ARM.com Process *p, ThreadContext *tc); 2419651SAndreas.Sandberg@ARM.com 2429651SAndreas.Sandberg@ARM.com 2439651SAndreas.Sandberg@ARM.com/// Target ftruncate() handler. 2449651SAndreas.Sandberg@ARM.comSyscallReturn ftruncateFunc(SyscallDesc *desc, int num, 2459651SAndreas.Sandberg@ARM.com Process *p, ThreadContext *tc); 2469651SAndreas.Sandberg@ARM.com 2479651SAndreas.Sandberg@ARM.com 2489651SAndreas.Sandberg@ARM.com/// Target truncate64() handler. 2499651SAndreas.Sandberg@ARM.comSyscallReturn truncate64Func(SyscallDesc *desc, int num, 2509651SAndreas.Sandberg@ARM.com Process *p, ThreadContext *tc); 2519651SAndreas.Sandberg@ARM.com 2529651SAndreas.Sandberg@ARM.com/// Target ftruncate64() handler. 2539651SAndreas.Sandberg@ARM.comSyscallReturn ftruncate64Func(SyscallDesc *desc, int num, 2549651SAndreas.Sandberg@ARM.com Process *p, ThreadContext *tc); 2559651SAndreas.Sandberg@ARM.com 2569651SAndreas.Sandberg@ARM.com 2579651SAndreas.Sandberg@ARM.com/// Target umask() handler. 2589651SAndreas.Sandberg@ARM.comSyscallReturn umaskFunc(SyscallDesc *desc, int num, 2599651SAndreas.Sandberg@ARM.com Process *p, ThreadContext *tc); 2609651SAndreas.Sandberg@ARM.com 26110905Sandreas.sandberg@arm.com/// Target gettid() handler. 2629651SAndreas.Sandberg@ARM.comSyscallReturn gettidFunc(SyscallDesc *desc, int num, 2639683Sandreas@sandberg.pp.se Process *p, ThreadContext *tc); 2649683Sandreas@sandberg.pp.se 2659683Sandreas@sandberg.pp.se/// Target chown() handler. 2669683Sandreas@sandberg.pp.seSyscallReturn chownFunc(SyscallDesc *desc, int num, 2679683Sandreas@sandberg.pp.se Process *p, ThreadContext *tc); 2689651SAndreas.Sandberg@ARM.com 2699651SAndreas.Sandberg@ARM.com/// Target setpgid() handler. 27010905Sandreas.sandberg@arm.comSyscallReturn setpgidFunc(SyscallDesc *desc, int num, 2719651SAndreas.Sandberg@ARM.com Process *p, ThreadContext *tc); 2729651SAndreas.Sandberg@ARM.com 2739651SAndreas.Sandberg@ARM.com/// Target fchown() handler. 27410905Sandreas.sandberg@arm.comSyscallReturn fchownFunc(SyscallDesc *desc, int num, 2759651SAndreas.Sandberg@ARM.com Process *p, ThreadContext *tc); 2769683Sandreas@sandberg.pp.se 2779683Sandreas@sandberg.pp.se/// Target dup() handler. 2789651SAndreas.Sandberg@ARM.comSyscallReturn dupFunc(SyscallDesc *desc, int num, 2799651SAndreas.Sandberg@ARM.com Process *process, ThreadContext *tc); 28010905Sandreas.sandberg@arm.com 2819652SAndreas.Sandberg@ARM.com/// Target dup2() handler. 2829651SAndreas.Sandberg@ARM.comSyscallReturn dup2Func(SyscallDesc *desc, int num, 2839651SAndreas.Sandberg@ARM.com Process *process, ThreadContext *tc); 28410913Sandreas.sandberg@arm.com 28510913Sandreas.sandberg@arm.com/// Target fcntl() handler. 2869651SAndreas.Sandberg@ARM.comSyscallReturn fcntlFunc(SyscallDesc *desc, int num, 2879651SAndreas.Sandberg@ARM.com Process *process, ThreadContext *tc); 28810913Sandreas.sandberg@arm.com 2899651SAndreas.Sandberg@ARM.com/// Target fcntl64() handler. 2909753Sandreas@sandberg.pp.seSyscallReturn fcntl64Func(SyscallDesc *desc, int num, 2919753Sandreas@sandberg.pp.se Process *process, ThreadContext *tc); 2929753Sandreas@sandberg.pp.se 2939753Sandreas@sandberg.pp.se/// Target setuid() handler. 2949753Sandreas@sandberg.pp.seSyscallReturn setuidFunc(SyscallDesc *desc, int num, 2959753Sandreas@sandberg.pp.se Process *p, ThreadContext *tc); 2969753Sandreas@sandberg.pp.se 2979753Sandreas@sandberg.pp.se/// Target pipe() handler. 29810913Sandreas.sandberg@arm.comSyscallReturn pipeFunc(SyscallDesc *desc, int num, 29910913Sandreas.sandberg@arm.com Process *p, ThreadContext *tc); 3009651SAndreas.Sandberg@ARM.com 3019753Sandreas@sandberg.pp.se/// Internal pipe() handler. 3029753Sandreas@sandberg.pp.seSyscallReturn pipeImpl(SyscallDesc *desc, int num, Process *p, 3039753Sandreas@sandberg.pp.se ThreadContext *tc, bool pseudoPipe); 3049753Sandreas@sandberg.pp.se 3059753Sandreas@sandberg.pp.se/// Target getpid() handler. 3069753Sandreas@sandberg.pp.seSyscallReturn getpidFunc(SyscallDesc *desc, int num, 3079753Sandreas@sandberg.pp.se Process *p, ThreadContext *tc); 3089651SAndreas.Sandberg@ARM.com 3099753Sandreas@sandberg.pp.se// Target getpeername() handler. 3109753Sandreas@sandberg.pp.seSyscallReturn getpeernameFunc(SyscallDesc *desc, int num, 3119753Sandreas@sandberg.pp.se Process *p, ThreadContext *tc); 3129753Sandreas@sandberg.pp.se 3139753Sandreas@sandberg.pp.se// Target bind() handler. 3149753Sandreas@sandberg.pp.seSyscallReturn bindFunc(SyscallDesc *desc, int num, 3159753Sandreas@sandberg.pp.se Process *p, ThreadContext *tc); 3169753Sandreas@sandberg.pp.se 3179753Sandreas@sandberg.pp.se// Target listen() handler. 31810913Sandreas.sandberg@arm.comSyscallReturn listenFunc(SyscallDesc *desc, int num, 3199753Sandreas@sandberg.pp.se Process *p, ThreadContext *tc); 3209753Sandreas@sandberg.pp.se 3219753Sandreas@sandberg.pp.se// Target connect() handler. 3229753Sandreas@sandberg.pp.seSyscallReturn connectFunc(SyscallDesc *desc, int num, 3239753Sandreas@sandberg.pp.se Process *p, ThreadContext *tc); 3249753Sandreas@sandberg.pp.se 3259753Sandreas@sandberg.pp.se#if defined(SYS_getdents) 3269753Sandreas@sandberg.pp.se// Target getdents() handler. 3279753Sandreas@sandberg.pp.seSyscallReturn getdentsFunc(SyscallDesc *desc, int num, 3289753Sandreas@sandberg.pp.se Process *p, ThreadContext *tc); 32910913Sandreas.sandberg@arm.com#endif 3309753Sandreas@sandberg.pp.se 3319753Sandreas@sandberg.pp.se#if defined(SYS_getdents64) 3329753Sandreas@sandberg.pp.se// Target getdents() handler. 3339753Sandreas@sandberg.pp.seSyscallReturn getdents64Func(SyscallDesc *desc, int num, 33410913Sandreas.sandberg@arm.com Process *p, ThreadContext *tc); 3359753Sandreas@sandberg.pp.se#endif 3369753Sandreas@sandberg.pp.se 3379753Sandreas@sandberg.pp.se// Target sendto() handler. 33810913Sandreas.sandberg@arm.comSyscallReturn sendtoFunc(SyscallDesc *desc, int num, 3399753Sandreas@sandberg.pp.se Process *p, ThreadContext *tc); 3409651SAndreas.Sandberg@ARM.com 3419651SAndreas.Sandberg@ARM.com// Target recvfrom() handler. 3429651SAndreas.Sandberg@ARM.comSyscallReturn recvfromFunc(SyscallDesc *desc, int num, 3439651SAndreas.Sandberg@ARM.com Process *p, ThreadContext *tc); 3449651SAndreas.Sandberg@ARM.com 3459651SAndreas.Sandberg@ARM.com// Target recvmsg() handler. 3469651SAndreas.Sandberg@ARM.comSyscallReturn recvmsgFunc(SyscallDesc *desc, int num, 3479651SAndreas.Sandberg@ARM.com Process *p, ThreadContext *tc); 3489651SAndreas.Sandberg@ARM.com 3499651SAndreas.Sandberg@ARM.com// Target sendmsg() handler. 3509651SAndreas.Sandberg@ARM.comSyscallReturn sendmsgFunc(SyscallDesc *desc, int num, 3519651SAndreas.Sandberg@ARM.com Process *p, ThreadContext *tc); 3529651SAndreas.Sandberg@ARM.com 3539651SAndreas.Sandberg@ARM.com// Target getuid() handler. 3549651SAndreas.Sandberg@ARM.comSyscallReturn getuidFunc(SyscallDesc *desc, int num, 3559651SAndreas.Sandberg@ARM.com Process *p, ThreadContext *tc); 3569651SAndreas.Sandberg@ARM.com 3579651SAndreas.Sandberg@ARM.com/// Target getgid() handler. 3589651SAndreas.Sandberg@ARM.comSyscallReturn getgidFunc(SyscallDesc *desc, int num, 3599651SAndreas.Sandberg@ARM.com Process *p, ThreadContext *tc); 3609651SAndreas.Sandberg@ARM.com 3619651SAndreas.Sandberg@ARM.com/// Target getppid() handler. 3629651SAndreas.Sandberg@ARM.comSyscallReturn getppidFunc(SyscallDesc *desc, int num, 3639651SAndreas.Sandberg@ARM.com Process *p, ThreadContext *tc); 3649651SAndreas.Sandberg@ARM.com 3659651SAndreas.Sandberg@ARM.com/// Target geteuid() handler. 36611363Sandreas@sandberg.pp.seSyscallReturn geteuidFunc(SyscallDesc *desc, int num, 36711363Sandreas@sandberg.pp.se Process *p, ThreadContext *tc); 36811363Sandreas@sandberg.pp.se 36911363Sandreas@sandberg.pp.se/// Target getegid() handler. 37011363Sandreas@sandberg.pp.seSyscallReturn getegidFunc(SyscallDesc *desc, int num, 37111363Sandreas@sandberg.pp.se Process *p, ThreadContext *tc); 37211363Sandreas@sandberg.pp.se 37311363Sandreas@sandberg.pp.se/// Target access() handler 37411363Sandreas@sandberg.pp.seSyscallReturn accessFunc(SyscallDesc *desc, int num, 37511363Sandreas@sandberg.pp.se Process *p, ThreadContext *tc); 37611363Sandreas@sandberg.pp.seSyscallReturn accessFunc(SyscallDesc *desc, int num, 37711363Sandreas@sandberg.pp.se Process *p, ThreadContext *tc, 37811363Sandreas@sandberg.pp.se int index); 37911363Sandreas@sandberg.pp.se 38011363Sandreas@sandberg.pp.se// Target getsockopt() handler. 38111363Sandreas@sandberg.pp.seSyscallReturn getsockoptFunc(SyscallDesc *desc, int num, 38211363Sandreas@sandberg.pp.se Process *p, ThreadContext *tc); 38311363Sandreas@sandberg.pp.se 38411363Sandreas@sandberg.pp.se// Target setsockopt() handler. 38511363Sandreas@sandberg.pp.seSyscallReturn setsockoptFunc(SyscallDesc *desc, int num, 38611363Sandreas@sandberg.pp.se Process *p, ThreadContext *tc); 38711363Sandreas@sandberg.pp.se 38811363Sandreas@sandberg.pp.se// Target getsockname() handler. 3899651SAndreas.Sandberg@ARM.comSyscallReturn getsocknameFunc(SyscallDesc *desc, int num, 3909651SAndreas.Sandberg@ARM.com Process *p, ThreadContext *tc); 3919652SAndreas.Sandberg@ARM.com 3929652SAndreas.Sandberg@ARM.com/// Futex system call 3939651SAndreas.Sandberg@ARM.com/// Implemented by Daniel Sanchez 3949651SAndreas.Sandberg@ARM.com/// Used by printf's in multi-threaded apps 3959651SAndreas.Sandberg@ARM.comtemplate <class OS> 3969651SAndreas.Sandberg@ARM.comSyscallReturn 3979651SAndreas.Sandberg@ARM.comfutexFunc(SyscallDesc *desc, int callnum, Process *process, 3989651SAndreas.Sandberg@ARM.com ThreadContext *tc) 3999651SAndreas.Sandberg@ARM.com{ 4009651SAndreas.Sandberg@ARM.com using namespace std; 4019651SAndreas.Sandberg@ARM.com 4029651SAndreas.Sandberg@ARM.com int index = 0; 4039651SAndreas.Sandberg@ARM.com Addr uaddr = process->getSyscallArg(tc, index); 4049651SAndreas.Sandberg@ARM.com int op = process->getSyscallArg(tc, index); 4059651SAndreas.Sandberg@ARM.com int val = process->getSyscallArg(tc, index); 4069651SAndreas.Sandberg@ARM.com 4079651SAndreas.Sandberg@ARM.com /* 4089651SAndreas.Sandberg@ARM.com * Unsupported option that does not affect the correctness of the 4099651SAndreas.Sandberg@ARM.com * application. This is a performance optimization utilized by Linux. 4109651SAndreas.Sandberg@ARM.com */ 4119651SAndreas.Sandberg@ARM.com op &= ~OS::TGT_FUTEX_PRIVATE_FLAG; 4129651SAndreas.Sandberg@ARM.com 4139651SAndreas.Sandberg@ARM.com FutexMap &futex_map = tc->getSystemPtr()->futexMap; 4149651SAndreas.Sandberg@ARM.com 4159651SAndreas.Sandberg@ARM.com if (OS::TGT_FUTEX_WAIT == op) { 4169753Sandreas@sandberg.pp.se // Ensure futex system call accessed atomically. 4179753Sandreas@sandberg.pp.se BufferArg buf(uaddr, sizeof(int)); 4189753Sandreas@sandberg.pp.se buf.copyIn(tc->getMemProxy()); 4199753Sandreas@sandberg.pp.se int mem_val = *(int*)buf.bufferPtr(); 4209753Sandreas@sandberg.pp.se 4219753Sandreas@sandberg.pp.se /* 4229651SAndreas.Sandberg@ARM.com * The value in memory at uaddr is not equal with the expected val 4239651SAndreas.Sandberg@ARM.com * (a different thread must have changed it before the system call was 4249651SAndreas.Sandberg@ARM.com * invoked). In this case, we need to throw an error. 4259651SAndreas.Sandberg@ARM.com */ 4269651SAndreas.Sandberg@ARM.com if (val != mem_val) 4279651SAndreas.Sandberg@ARM.com return -OS::TGT_EWOULDBLOCK; 4289651SAndreas.Sandberg@ARM.com 4299651SAndreas.Sandberg@ARM.com futex_map.suspend(uaddr, process->tgid(), tc); 4309651SAndreas.Sandberg@ARM.com 4319651SAndreas.Sandberg@ARM.com return 0; 4329651SAndreas.Sandberg@ARM.com } else if (OS::TGT_FUTEX_WAKE == op) { 4339651SAndreas.Sandberg@ARM.com return futex_map.wakeup(uaddr, process->tgid(), val); 43411151Smitch.hayenga@arm.com } 4359651SAndreas.Sandberg@ARM.com 4369651SAndreas.Sandberg@ARM.com warn("futex: op %d not implemented; ignoring.", op); 43710157Sandreas@sandberg.pp.se return -ENOSYS; 43810157Sandreas@sandberg.pp.se} 43910157Sandreas@sandberg.pp.se 44010157Sandreas@sandberg.pp.se 44110157Sandreas@sandberg.pp.se/// Pseudo Funcs - These functions use a different return convension, 44210157Sandreas@sandberg.pp.se/// returning a second value in a register other than the normal return register 44310157Sandreas@sandberg.pp.seSyscallReturn pipePseudoFunc(SyscallDesc *desc, int num, 4449651SAndreas.Sandberg@ARM.com Process *process, ThreadContext *tc); 4459651SAndreas.Sandberg@ARM.com 4469651SAndreas.Sandberg@ARM.com/// Target getpidPseudo() handler. 4479651SAndreas.Sandberg@ARM.comSyscallReturn getpidPseudoFunc(SyscallDesc *desc, int num, 4489651SAndreas.Sandberg@ARM.com Process *p, ThreadContext *tc); 4499651SAndreas.Sandberg@ARM.com 4509651SAndreas.Sandberg@ARM.com/// Target getuidPseudo() handler. 4519651SAndreas.Sandberg@ARM.comSyscallReturn getuidPseudoFunc(SyscallDesc *desc, int num, 45210407Smitch.hayenga@arm.com Process *p, ThreadContext *tc); 4539651SAndreas.Sandberg@ARM.com 45410407Smitch.hayenga@arm.com/// Target getgidPseudo() handler. 4559651SAndreas.Sandberg@ARM.comSyscallReturn getgidPseudoFunc(SyscallDesc *desc, int num, 4569651SAndreas.Sandberg@ARM.com Process *p, ThreadContext *tc); 4579651SAndreas.Sandberg@ARM.com 4589651SAndreas.Sandberg@ARM.com 4599651SAndreas.Sandberg@ARM.com/// A readable name for 1,000,000, for converting microseconds to seconds. 4609651SAndreas.Sandberg@ARM.comconst int one_million = 1000000; 4619651SAndreas.Sandberg@ARM.com/// A readable name for 1,000,000,000, for converting nanoseconds to seconds. 4629754Sandreas@sandberg.pp.seconst int one_billion = 1000000000; 4639651SAndreas.Sandberg@ARM.com 46410407Smitch.hayenga@arm.com/// Approximate seconds since the epoch (1/1/1970). About a billion, 4659651SAndreas.Sandberg@ARM.com/// by my reckoning. We want to keep this a constant (not use the 4669651SAndreas.Sandberg@ARM.com/// real-world time) to keep simulations repeatable. 4679651SAndreas.Sandberg@ARM.comconst unsigned seconds_since_epoch = 1000000000; 4689651SAndreas.Sandberg@ARM.com 4699651SAndreas.Sandberg@ARM.com/// Helper function to convert current elapsed time to seconds and 4709651SAndreas.Sandberg@ARM.com/// microseconds. 4719651SAndreas.Sandberg@ARM.comtemplate <class T1, class T2> 4729651SAndreas.Sandberg@ARM.comvoid 4739651SAndreas.Sandberg@ARM.comgetElapsedTimeMicro(T1 &sec, T2 &usec) 4749651SAndreas.Sandberg@ARM.com{ 4759651SAndreas.Sandberg@ARM.com uint64_t elapsed_usecs = curTick() / SimClock::Int::us; 4769651SAndreas.Sandberg@ARM.com sec = elapsed_usecs / one_million; 4779651SAndreas.Sandberg@ARM.com usec = elapsed_usecs % one_million; 4789651SAndreas.Sandberg@ARM.com} 4799651SAndreas.Sandberg@ARM.com 48010553Salexandru.dutu@amd.com/// Helper function to convert current elapsed time to seconds and 4819651SAndreas.Sandberg@ARM.com/// nanoseconds. 4829651SAndreas.Sandberg@ARM.comtemplate <class T1, class T2> 4839651SAndreas.Sandberg@ARM.comvoid 4849651SAndreas.Sandberg@ARM.comgetElapsedTimeNano(T1 &sec, T2 &nsec) 4859651SAndreas.Sandberg@ARM.com{ 4869651SAndreas.Sandberg@ARM.com uint64_t elapsed_nsecs = curTick() / SimClock::Int::ns; 4879651SAndreas.Sandberg@ARM.com sec = elapsed_nsecs / one_billion; 4889651SAndreas.Sandberg@ARM.com nsec = elapsed_nsecs % one_billion; 4899651SAndreas.Sandberg@ARM.com} 4909651SAndreas.Sandberg@ARM.com 4919651SAndreas.Sandberg@ARM.com////////////////////////////////////////////////////////////////////// 4929651SAndreas.Sandberg@ARM.com// 4939651SAndreas.Sandberg@ARM.com// The following emulation functions are generic, but need to be 4949651SAndreas.Sandberg@ARM.com// templated to account for differences in types, constants, etc. 4959651SAndreas.Sandberg@ARM.com// 4969651SAndreas.Sandberg@ARM.com////////////////////////////////////////////////////////////////////// 4979651SAndreas.Sandberg@ARM.com 4989651SAndreas.Sandberg@ARM.com typedef struct statfs hst_statfs; 4999651SAndreas.Sandberg@ARM.com#if NO_STAT64 5009651SAndreas.Sandberg@ARM.com typedef struct stat hst_stat; 5019651SAndreas.Sandberg@ARM.com typedef struct stat hst_stat64; 5029651SAndreas.Sandberg@ARM.com#else 5039651SAndreas.Sandberg@ARM.com typedef struct stat hst_stat; 5049651SAndreas.Sandberg@ARM.com typedef struct stat64 hst_stat64; 5059651SAndreas.Sandberg@ARM.com#endif 5069652SAndreas.Sandberg@ARM.com 5079652SAndreas.Sandberg@ARM.com//// Helper function to convert a host stat buffer to a target stat 5089652SAndreas.Sandberg@ARM.com//// buffer. Also copies the target buffer out to the simulated 5099652SAndreas.Sandberg@ARM.com//// memory space. Used by stat(), fstat(), and lstat(). 5109652SAndreas.Sandberg@ARM.com 5119652SAndreas.Sandberg@ARM.comtemplate <typename target_stat, typename host_stat> 5129652SAndreas.Sandberg@ARM.comvoid 5139652SAndreas.Sandberg@ARM.comconvertStatBuf(target_stat &tgt, host_stat *host, bool fakeTTY = false) 5149652SAndreas.Sandberg@ARM.com{ 5159651SAndreas.Sandberg@ARM.com using namespace TheISA; 5169651SAndreas.Sandberg@ARM.com 5179651SAndreas.Sandberg@ARM.com if (fakeTTY) 5189752Sandreas@sandberg.pp.se tgt->st_dev = 0xA; 5199651SAndreas.Sandberg@ARM.com else 5209651SAndreas.Sandberg@ARM.com tgt->st_dev = host->st_dev; 5219651SAndreas.Sandberg@ARM.com tgt->st_dev = TheISA::htog(tgt->st_dev); 5229651SAndreas.Sandberg@ARM.com tgt->st_ino = host->st_ino; 5239651SAndreas.Sandberg@ARM.com tgt->st_ino = TheISA::htog(tgt->st_ino); 5249651SAndreas.Sandberg@ARM.com tgt->st_mode = host->st_mode; 5259752Sandreas@sandberg.pp.se if (fakeTTY) { 5269651SAndreas.Sandberg@ARM.com // Claim to be a character device 5279651SAndreas.Sandberg@ARM.com tgt->st_mode &= ~S_IFMT; // Clear S_IFMT 5289651SAndreas.Sandberg@ARM.com tgt->st_mode |= S_IFCHR; // Set S_IFCHR 52910905Sandreas.sandberg@arm.com } 5309651SAndreas.Sandberg@ARM.com tgt->st_mode = TheISA::htog(tgt->st_mode); 5319651SAndreas.Sandberg@ARM.com tgt->st_nlink = host->st_nlink; 5329651SAndreas.Sandberg@ARM.com tgt->st_nlink = TheISA::htog(tgt->st_nlink); 5339651SAndreas.Sandberg@ARM.com tgt->st_uid = host->st_uid; 5349651SAndreas.Sandberg@ARM.com tgt->st_uid = TheISA::htog(tgt->st_uid); 5359651SAndreas.Sandberg@ARM.com tgt->st_gid = host->st_gid; 5369651SAndreas.Sandberg@ARM.com tgt->st_gid = TheISA::htog(tgt->st_gid); 5379753Sandreas@sandberg.pp.se if (fakeTTY) 5389753Sandreas@sandberg.pp.se tgt->st_rdev = 0x880d; 5399651SAndreas.Sandberg@ARM.com else 5409651SAndreas.Sandberg@ARM.com tgt->st_rdev = host->st_rdev; 5419753Sandreas@sandberg.pp.se tgt->st_rdev = TheISA::htog(tgt->st_rdev); 5429753Sandreas@sandberg.pp.se tgt->st_size = host->st_size; 5439753Sandreas@sandberg.pp.se tgt->st_size = TheISA::htog(tgt->st_size); 5449753Sandreas@sandberg.pp.se tgt->st_atimeX = host->st_atime; 5459753Sandreas@sandberg.pp.se tgt->st_atimeX = TheISA::htog(tgt->st_atimeX); 5469753Sandreas@sandberg.pp.se tgt->st_mtimeX = host->st_mtime; 5479651SAndreas.Sandberg@ARM.com tgt->st_mtimeX = TheISA::htog(tgt->st_mtimeX); 5489651SAndreas.Sandberg@ARM.com tgt->st_ctimeX = host->st_ctime; 5499753Sandreas@sandberg.pp.se tgt->st_ctimeX = TheISA::htog(tgt->st_ctimeX); 5509753Sandreas@sandberg.pp.se // Force the block size to be 8KB. This helps to ensure buffered io works 55110858Sandreas.sandberg@arm.com // consistently across different hosts. 55210858Sandreas.sandberg@arm.com tgt->st_blksize = 0x2000; 55310858Sandreas.sandberg@arm.com tgt->st_blksize = TheISA::htog(tgt->st_blksize); 55410858Sandreas.sandberg@arm.com tgt->st_blocks = host->st_blocks; 55510858Sandreas.sandberg@arm.com tgt->st_blocks = TheISA::htog(tgt->st_blocks); 55610858Sandreas.sandberg@arm.com} 55710858Sandreas.sandberg@arm.com 55810858Sandreas.sandberg@arm.com// Same for stat64 5599753Sandreas@sandberg.pp.se 5609753Sandreas@sandberg.pp.setemplate <typename target_stat, typename host_stat64> 5619753Sandreas@sandberg.pp.sevoid 5629753Sandreas@sandberg.pp.seconvertStat64Buf(target_stat &tgt, host_stat64 *host, bool fakeTTY = false) 5639892Sandreas@sandberg.pp.se{ 56410858Sandreas.sandberg@arm.com using namespace TheISA; 56510858Sandreas.sandberg@arm.com 56610858Sandreas.sandberg@arm.com convertStatBuf<target_stat, host_stat64>(tgt, host, fakeTTY); 56710858Sandreas.sandberg@arm.com#if defined(STAT_HAVE_NSEC) 5689892Sandreas@sandberg.pp.se tgt->st_atime_nsec = host->st_atime_nsec; 5699753Sandreas@sandberg.pp.se tgt->st_atime_nsec = TheISA::htog(tgt->st_atime_nsec); 57010913Sandreas.sandberg@arm.com tgt->st_mtime_nsec = host->st_mtime_nsec; 5719753Sandreas@sandberg.pp.se tgt->st_mtime_nsec = TheISA::htog(tgt->st_mtime_nsec); 5729753Sandreas@sandberg.pp.se tgt->st_ctime_nsec = host->st_ctime_nsec; 5739753Sandreas@sandberg.pp.se tgt->st_ctime_nsec = TheISA::htog(tgt->st_ctime_nsec); 5749753Sandreas@sandberg.pp.se#else 5759753Sandreas@sandberg.pp.se tgt->st_atime_nsec = 0; 5769753Sandreas@sandberg.pp.se tgt->st_mtime_nsec = 0; 5779753Sandreas@sandberg.pp.se tgt->st_ctime_nsec = 0; 5789753Sandreas@sandberg.pp.se#endif 5799753Sandreas@sandberg.pp.se} 58010112Sandreas@sandberg.pp.se 58110112Sandreas@sandberg.pp.se// Here are a couple of convenience functions 58210112Sandreas@sandberg.pp.setemplate<class OS> 58310112Sandreas@sandberg.pp.sevoid 58410112Sandreas@sandberg.pp.secopyOutStatBuf(SETranslatingPortProxy &mem, Addr addr, 58510112Sandreas@sandberg.pp.se hst_stat *host, bool fakeTTY = false) 5869753Sandreas@sandberg.pp.se{ 5879753Sandreas@sandberg.pp.se typedef TypedBufferArg<typename OS::tgt_stat> tgt_stat_buf; 5889753Sandreas@sandberg.pp.se tgt_stat_buf tgt(addr); 5899753Sandreas@sandberg.pp.se convertStatBuf<tgt_stat_buf, hst_stat>(tgt, host, fakeTTY); 5909753Sandreas@sandberg.pp.se tgt.copyOut(mem); 5919753Sandreas@sandberg.pp.se} 5929753Sandreas@sandberg.pp.se 5939755Sandreas@sandberg.pp.setemplate<class OS> 5949753Sandreas@sandberg.pp.sevoid 5959755Sandreas@sandberg.pp.secopyOutStat64Buf(SETranslatingPortProxy &mem, Addr addr, 5969755Sandreas@sandberg.pp.se hst_stat64 *host, bool fakeTTY = false) 5979753Sandreas@sandberg.pp.se{ 5989755Sandreas@sandberg.pp.se typedef TypedBufferArg<typename OS::tgt_stat64> tgt_stat_buf; 5999753Sandreas@sandberg.pp.se tgt_stat_buf tgt(addr); 6009904Sandreas@sandberg.pp.se convertStat64Buf<tgt_stat_buf, hst_stat64>(tgt, host, fakeTTY); 6019904Sandreas@sandberg.pp.se tgt.copyOut(mem); 6029904Sandreas@sandberg.pp.se} 6039904Sandreas@sandberg.pp.se 6049904Sandreas@sandberg.pp.setemplate <class OS> 6059904Sandreas@sandberg.pp.sevoid 6069753Sandreas@sandberg.pp.secopyOutStatfsBuf(SETranslatingPortProxy &mem, Addr addr, 6079753Sandreas@sandberg.pp.se hst_statfs *host) 6089753Sandreas@sandberg.pp.se{ 6099753Sandreas@sandberg.pp.se TypedBufferArg<typename OS::tgt_statfs> tgt(addr); 6109651SAndreas.Sandberg@ARM.com 6119753Sandreas@sandberg.pp.se tgt->f_type = TheISA::htog(host->f_type); 6129753Sandreas@sandberg.pp.se#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) 6139651SAndreas.Sandberg@ARM.com tgt->f_bsize = TheISA::htog(host->f_iosize); 6149753Sandreas@sandberg.pp.se#else 6159753Sandreas@sandberg.pp.se tgt->f_bsize = TheISA::htog(host->f_bsize); 6169753Sandreas@sandberg.pp.se#endif 6179753Sandreas@sandberg.pp.se tgt->f_blocks = TheISA::htog(host->f_blocks); 6189753Sandreas@sandberg.pp.se tgt->f_bfree = TheISA::htog(host->f_bfree); 6199753Sandreas@sandberg.pp.se tgt->f_bavail = TheISA::htog(host->f_bavail); 6209753Sandreas@sandberg.pp.se tgt->f_files = TheISA::htog(host->f_files); 6219753Sandreas@sandberg.pp.se tgt->f_ffree = TheISA::htog(host->f_ffree); 6229753Sandreas@sandberg.pp.se memcpy(&tgt->f_fsid, &host->f_fsid, sizeof(host->f_fsid)); 6239753Sandreas@sandberg.pp.se#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) 6249753Sandreas@sandberg.pp.se tgt->f_namelen = TheISA::htog(host->f_namemax); 6259753Sandreas@sandberg.pp.se tgt->f_frsize = TheISA::htog(host->f_bsize); 6269753Sandreas@sandberg.pp.se#elif defined(__APPLE__) 6279753Sandreas@sandberg.pp.se tgt->f_namelen = 0; 6289753Sandreas@sandberg.pp.se tgt->f_frsize = 0; 6299753Sandreas@sandberg.pp.se#else 6309753Sandreas@sandberg.pp.se tgt->f_namelen = TheISA::htog(host->f_namelen); 6319651SAndreas.Sandberg@ARM.com tgt->f_frsize = TheISA::htog(host->f_frsize); 6329651SAndreas.Sandberg@ARM.com#endif 6339735Sandreas@sandberg.pp.se#if defined(__linux__) 6349735Sandreas@sandberg.pp.se memcpy(&tgt->f_spare, &host->f_spare, sizeof(host->f_spare)); 6359735Sandreas@sandberg.pp.se#else 6369735Sandreas@sandberg.pp.se /* 6379735Sandreas@sandberg.pp.se * The fields are different sizes per OS. Don't bother with 6389735Sandreas@sandberg.pp.se * f_spare or f_reserved on non-Linux for now. 6399651SAndreas.Sandberg@ARM.com */ 6409651SAndreas.Sandberg@ARM.com memset(&tgt->f_spare, 0, sizeof(tgt->f_spare)); 6419651SAndreas.Sandberg@ARM.com#endif 6429753Sandreas@sandberg.pp.se 64311363Sandreas@sandberg.pp.se tgt.copyOut(mem); 64411363Sandreas@sandberg.pp.se} 64511363Sandreas@sandberg.pp.se 6469651SAndreas.Sandberg@ARM.com/// Target ioctl() handler. For the most part, programs call ioctl() 6479655SAndreas.Sandberg@ARM.com/// only to find out if their stdout is a tty, to determine whether to 6489753Sandreas@sandberg.pp.se/// do line or block buffering. We always claim that output fds are 6499753Sandreas@sandberg.pp.se/// not TTYs to provide repeatable results. 6509753Sandreas@sandberg.pp.setemplate <class OS> 6519753Sandreas@sandberg.pp.seSyscallReturn 6529753Sandreas@sandberg.pp.seioctlFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 6539735Sandreas@sandberg.pp.se{ 6549755Sandreas@sandberg.pp.se int index = 0; 6559755Sandreas@sandberg.pp.se int tgt_fd = p->getSyscallArg(tc, index); 65610114Sandreas@sandberg.pp.se unsigned req = p->getSyscallArg(tc, index); 65710114Sandreas@sandberg.pp.se 65810114Sandreas@sandberg.pp.se DPRINTF(SyscallVerbose, "ioctl(%d, 0x%x, ...)\n", tgt_fd, req); 6599753Sandreas@sandberg.pp.se 66010114Sandreas@sandberg.pp.se if (OS::isTtyReq(req)) 6619655SAndreas.Sandberg@ARM.com return -ENOTTY; 66210114Sandreas@sandberg.pp.se 66310114Sandreas@sandberg.pp.se auto dfdp = std::dynamic_pointer_cast<DeviceFDEntry>((*p->fds)[tgt_fd]); 66410114Sandreas@sandberg.pp.se if (!dfdp) 6659753Sandreas@sandberg.pp.se return -EBADF; 66610114Sandreas@sandberg.pp.se 66710114Sandreas@sandberg.pp.se /** 6689753Sandreas@sandberg.pp.se * If the driver is valid, issue the ioctl through it. Otherwise, 6699753Sandreas@sandberg.pp.se * there's an implicit assumption that the device is a TTY type and we 6709753Sandreas@sandberg.pp.se * return that we do not have a valid TTY. 6719753Sandreas@sandberg.pp.se */ 6729753Sandreas@sandberg.pp.se EmulatedDriver *emul_driver = dfdp->getDriver(); 6739753Sandreas@sandberg.pp.se if (emul_driver) 6749753Sandreas@sandberg.pp.se return emul_driver->ioctl(p, tc, req); 67510157Sandreas@sandberg.pp.se 67610157Sandreas@sandberg.pp.se /** 67710157Sandreas@sandberg.pp.se * For lack of a better return code, return ENOTTY. Ideally, we should 67810157Sandreas@sandberg.pp.se * return something better here, but at least we issue the warning. 67910157Sandreas@sandberg.pp.se */ 68010157Sandreas@sandberg.pp.se warn("Unsupported ioctl call (return ENOTTY): ioctl(%d, 0x%x, ...) @ \n", 68110157Sandreas@sandberg.pp.se tgt_fd, req, tc->pcState()); 68210157Sandreas@sandberg.pp.se return -ENOTTY; 6839753Sandreas@sandberg.pp.se} 6849753Sandreas@sandberg.pp.se 6859753Sandreas@sandberg.pp.setemplate <class OS> 6869753Sandreas@sandberg.pp.seSyscallReturn 6879753Sandreas@sandberg.pp.seopenImpl(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc, 6889753Sandreas@sandberg.pp.se bool isopenat) 6899753Sandreas@sandberg.pp.se{ 6909753Sandreas@sandberg.pp.se int index = 0; 6919753Sandreas@sandberg.pp.se int tgt_dirfd = -1; 6929753Sandreas@sandberg.pp.se 6939753Sandreas@sandberg.pp.se /** 6949753Sandreas@sandberg.pp.se * If using the openat variant, read in the target directory file 6959753Sandreas@sandberg.pp.se * descriptor from the simulated process. 6969753Sandreas@sandberg.pp.se */ 6979753Sandreas@sandberg.pp.se if (isopenat) 6989753Sandreas@sandberg.pp.se tgt_dirfd = p->getSyscallArg(tc, index); 6999753Sandreas@sandberg.pp.se 7009753Sandreas@sandberg.pp.se /** 7019753Sandreas@sandberg.pp.se * Retrieve the simulated process' memory proxy and then read in the path 7029753Sandreas@sandberg.pp.se * string from that memory space into the host's working memory space. 7039753Sandreas@sandberg.pp.se */ 7049753Sandreas@sandberg.pp.se std::string path; 7059753Sandreas@sandberg.pp.se if (!tc->getMemProxy().tryReadString(path, p->getSyscallArg(tc, index))) 7069753Sandreas@sandberg.pp.se return -EFAULT; 7079753Sandreas@sandberg.pp.se 70810114Sandreas@sandberg.pp.se#ifdef __CYGWIN32__ 7099753Sandreas@sandberg.pp.se int host_flags = O_BINARY; 7109753Sandreas@sandberg.pp.se#else 7119753Sandreas@sandberg.pp.se int host_flags = 0; 7129753Sandreas@sandberg.pp.se#endif 71310114Sandreas@sandberg.pp.se /** 7149753Sandreas@sandberg.pp.se * Translate target flags into host flags. Flags exist which are not 7159753Sandreas@sandberg.pp.se * ported between architectures which can cause check failures. 7169753Sandreas@sandberg.pp.se */ 7179753Sandreas@sandberg.pp.se int tgt_flags = p->getSyscallArg(tc, index); 7189753Sandreas@sandberg.pp.se for (int i = 0; i < OS::NUM_OPEN_FLAGS; i++) { 7199753Sandreas@sandberg.pp.se if (tgt_flags & OS::openFlagTable[i].tgtFlag) { 7209753Sandreas@sandberg.pp.se tgt_flags &= ~OS::openFlagTable[i].tgtFlag; 7219753Sandreas@sandberg.pp.se host_flags |= OS::openFlagTable[i].hostFlag; 7229753Sandreas@sandberg.pp.se } 7239753Sandreas@sandberg.pp.se } 7249753Sandreas@sandberg.pp.se if (tgt_flags) { 7259753Sandreas@sandberg.pp.se warn("open%s: cannot decode flags 0x%x", 7269753Sandreas@sandberg.pp.se isopenat ? "at" : "", tgt_flags); 7279753Sandreas@sandberg.pp.se } 7289753Sandreas@sandberg.pp.se#ifdef __CYGWIN32__ 7299753Sandreas@sandberg.pp.se host_flags |= O_BINARY; 7309651SAndreas.Sandberg@ARM.com#endif 7319655SAndreas.Sandberg@ARM.com 7329651SAndreas.Sandberg@ARM.com int mode = p->getSyscallArg(tc, index); 7339651SAndreas.Sandberg@ARM.com 7349651SAndreas.Sandberg@ARM.com /** 7359651SAndreas.Sandberg@ARM.com * If the simulated process called open or openat with AT_FDCWD specified, 7369651SAndreas.Sandberg@ARM.com * take the current working directory value which was passed into the 7379651SAndreas.Sandberg@ARM.com * process class as a Python parameter and append the current path to 7389651SAndreas.Sandberg@ARM.com * create a full path. 7399651SAndreas.Sandberg@ARM.com * Otherwise, openat with a valid target directory file descriptor has 7409651SAndreas.Sandberg@ARM.com * been called. If the path option, which was passed in as a parameter, 7419651SAndreas.Sandberg@ARM.com * is not absolute, retrieve the directory file descriptor's path and 7429651SAndreas.Sandberg@ARM.com * prepend it to the path passed in as a parameter. 7439651SAndreas.Sandberg@ARM.com * In every case, we should have a full path (which is relevant to the 7449651SAndreas.Sandberg@ARM.com * host) to work with after this block has been passed. 7459651SAndreas.Sandberg@ARM.com */ 7469651SAndreas.Sandberg@ARM.com if (!isopenat || (isopenat && tgt_dirfd == OS::TGT_AT_FDCWD)) { 7479651SAndreas.Sandberg@ARM.com path = p->fullPath(path); 7489651SAndreas.Sandberg@ARM.com } else if (!startswith(path, "/")) { 7499651SAndreas.Sandberg@ARM.com std::shared_ptr<FDEntry> fdep = ((*p->fds)[tgt_dirfd]); 7509651SAndreas.Sandberg@ARM.com auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(fdep); 7519651SAndreas.Sandberg@ARM.com if (!ffdp) 7529651SAndreas.Sandberg@ARM.com return -EBADF; 7539651SAndreas.Sandberg@ARM.com path.insert(0, ffdp->getFileName() + "/"); 7549651SAndreas.Sandberg@ARM.com } 7559651SAndreas.Sandberg@ARM.com 7569651SAndreas.Sandberg@ARM.com /** 7579651SAndreas.Sandberg@ARM.com * Since this is an emulated environment, we create pseudo file 7589651SAndreas.Sandberg@ARM.com * descriptors for device requests that have been registered with 7599651SAndreas.Sandberg@ARM.com * the process class through Python; this allows us to create a file 7609651SAndreas.Sandberg@ARM.com * descriptor for subsequent ioctl or mmap calls. 7619651SAndreas.Sandberg@ARM.com */ 7629651SAndreas.Sandberg@ARM.com if (startswith(path, "/dev/")) { 7639651SAndreas.Sandberg@ARM.com std::string filename = path.substr(strlen("/dev/")); 7649651SAndreas.Sandberg@ARM.com EmulatedDriver *drv = p->findDriver(filename); 7659651SAndreas.Sandberg@ARM.com if (drv) { 7669651SAndreas.Sandberg@ARM.com DPRINTF_SYSCALL(Verbose, "open%s: passing call to " 7679651SAndreas.Sandberg@ARM.com "driver open with path[%s]\n", 7689651SAndreas.Sandberg@ARM.com isopenat ? "at" : "", path.c_str()); 7699651SAndreas.Sandberg@ARM.com return drv->open(p, tc, mode, host_flags); 7709651SAndreas.Sandberg@ARM.com } 7719651SAndreas.Sandberg@ARM.com /** 7729651SAndreas.Sandberg@ARM.com * Fall through here for pass through to host devices, such 7739651SAndreas.Sandberg@ARM.com * as /dev/zero 7749651SAndreas.Sandberg@ARM.com */ 7759651SAndreas.Sandberg@ARM.com } 7769651SAndreas.Sandberg@ARM.com 7779651SAndreas.Sandberg@ARM.com /** 7789651SAndreas.Sandberg@ARM.com * Some special paths and files cannot be called on the host and need 7799651SAndreas.Sandberg@ARM.com * to be handled as special cases inside the simulator. 7809651SAndreas.Sandberg@ARM.com * If the full path that was created above does not match any of the 7819651SAndreas.Sandberg@ARM.com * special cases, pass it through to the open call on the host to let 7829651SAndreas.Sandberg@ARM.com * the host open the file on our behalf. 7839651SAndreas.Sandberg@ARM.com * If the host cannot open the file, return the host's error code back 7849651SAndreas.Sandberg@ARM.com * through the system call to the simulated process. 7859651SAndreas.Sandberg@ARM.com */ 7869651SAndreas.Sandberg@ARM.com int sim_fd = -1; 7879651SAndreas.Sandberg@ARM.com std::vector<std::string> special_paths = 7889651SAndreas.Sandberg@ARM.com { "/proc/", "/system/", "/sys/", "/platform/", "/etc/passwd" }; 7899651SAndreas.Sandberg@ARM.com for (auto entry : special_paths) { 7909651SAndreas.Sandberg@ARM.com if (startswith(path, entry)) 7919651SAndreas.Sandberg@ARM.com sim_fd = OS::openSpecialFile(path, p, tc); 7929651SAndreas.Sandberg@ARM.com } 7939651SAndreas.Sandberg@ARM.com if (sim_fd == -1) { 7949651SAndreas.Sandberg@ARM.com sim_fd = open(path.c_str(), host_flags, mode); 7959651SAndreas.Sandberg@ARM.com } 7969651SAndreas.Sandberg@ARM.com if (sim_fd == -1) { 7979651SAndreas.Sandberg@ARM.com int local = -errno; 7989651SAndreas.Sandberg@ARM.com DPRINTF_SYSCALL(Verbose, "open%s: failed -> path:%s\n", 7999651SAndreas.Sandberg@ARM.com isopenat ? "at" : "", path.c_str()); 8009651SAndreas.Sandberg@ARM.com return local; 8019651SAndreas.Sandberg@ARM.com } 8029651SAndreas.Sandberg@ARM.com 8039651SAndreas.Sandberg@ARM.com /** 8049651SAndreas.Sandberg@ARM.com * The file was opened successfully and needs to be recorded in the 8059651SAndreas.Sandberg@ARM.com * process' file descriptor array so that it can be retrieved later. 8069651SAndreas.Sandberg@ARM.com * The target file descriptor that is chosen will be the lowest unused 8079651SAndreas.Sandberg@ARM.com * file descriptor. 8089651SAndreas.Sandberg@ARM.com * Return the indirect target file descriptor back to the simulated 8099651SAndreas.Sandberg@ARM.com * process to act as a handle for the opened file. 8109651SAndreas.Sandberg@ARM.com */ 8119651SAndreas.Sandberg@ARM.com auto ffdp = std::make_shared<FileFDEntry>(sim_fd, host_flags, path, 0); 8129651SAndreas.Sandberg@ARM.com int tgt_fd = p->fds->allocFD(ffdp); 8139651SAndreas.Sandberg@ARM.com DPRINTF_SYSCALL(Verbose, "open%s: sim_fd[%d], target_fd[%d] -> path:%s\n", 8149651SAndreas.Sandberg@ARM.com isopenat ? "at" : "", sim_fd, tgt_fd, path.c_str()); 8159651SAndreas.Sandberg@ARM.com return tgt_fd; 8169651SAndreas.Sandberg@ARM.com} 8179651SAndreas.Sandberg@ARM.com 8189651SAndreas.Sandberg@ARM.com/// Target open() handler. 8199651SAndreas.Sandberg@ARM.comtemplate <class OS> 8209651SAndreas.Sandberg@ARM.comSyscallReturn 8219651SAndreas.Sandberg@ARM.comopenFunc(SyscallDesc *desc, int callnum, Process *process, 8229651SAndreas.Sandberg@ARM.com ThreadContext *tc) 8239651SAndreas.Sandberg@ARM.com{ 8249651SAndreas.Sandberg@ARM.com return openImpl<OS>(desc, callnum, process, tc, false); 8259651SAndreas.Sandberg@ARM.com} 8269651SAndreas.Sandberg@ARM.com 8279651SAndreas.Sandberg@ARM.com/// Target openat() handler. 8289651SAndreas.Sandberg@ARM.comtemplate <class OS> 8299651SAndreas.Sandberg@ARM.comSyscallReturn 8309651SAndreas.Sandberg@ARM.comopenatFunc(SyscallDesc *desc, int callnum, Process *process, 8319651SAndreas.Sandberg@ARM.com ThreadContext *tc) 8329651SAndreas.Sandberg@ARM.com{ 8339651SAndreas.Sandberg@ARM.com return openImpl<OS>(desc, callnum, process, tc, true); 8349651SAndreas.Sandberg@ARM.com} 8359651SAndreas.Sandberg@ARM.com 8369651SAndreas.Sandberg@ARM.com/// Target unlinkat() handler. 8379651SAndreas.Sandberg@ARM.comtemplate <class OS> 8389651SAndreas.Sandberg@ARM.comSyscallReturn 8399651SAndreas.Sandberg@ARM.comunlinkatFunc(SyscallDesc *desc, int callnum, Process *process, 8409651SAndreas.Sandberg@ARM.com ThreadContext *tc) 8419651SAndreas.Sandberg@ARM.com{ 8429651SAndreas.Sandberg@ARM.com int index = 0; 8439651SAndreas.Sandberg@ARM.com int dirfd = process->getSyscallArg(tc, index); 8449651SAndreas.Sandberg@ARM.com if (dirfd != OS::TGT_AT_FDCWD) 84510843Sandreas.sandberg@arm.com warn("unlinkat: first argument not AT_FDCWD; unlikely to work"); 84610843Sandreas.sandberg@arm.com 84710843Sandreas.sandberg@arm.com return unlinkHelper(desc, callnum, process, tc, 1); 84810843Sandreas.sandberg@arm.com} 84910843Sandreas.sandberg@arm.com 85010843Sandreas.sandberg@arm.com/// Target facessat() handler 85110843Sandreas.sandberg@arm.comtemplate <class OS> 85210843Sandreas.sandberg@arm.comSyscallReturn 8539651SAndreas.Sandberg@ARM.comfaccessatFunc(SyscallDesc *desc, int callnum, Process *process, 8549651SAndreas.Sandberg@ARM.com ThreadContext *tc) 8559651SAndreas.Sandberg@ARM.com{ 8569651SAndreas.Sandberg@ARM.com int index = 0; 8579651SAndreas.Sandberg@ARM.com int dirfd = process->getSyscallArg(tc, index); 8589651SAndreas.Sandberg@ARM.com if (dirfd != OS::TGT_AT_FDCWD) 8599651SAndreas.Sandberg@ARM.com warn("faccessat: first argument not AT_FDCWD; unlikely to work"); 8609651SAndreas.Sandberg@ARM.com return accessFunc(desc, callnum, process, tc, 1); 8619651SAndreas.Sandberg@ARM.com} 8629651SAndreas.Sandberg@ARM.com 8639651SAndreas.Sandberg@ARM.com/// Target readlinkat() handler 8649651SAndreas.Sandberg@ARM.comtemplate <class OS> 8659651SAndreas.Sandberg@ARM.comSyscallReturn 8669651SAndreas.Sandberg@ARM.comreadlinkatFunc(SyscallDesc *desc, int callnum, Process *process, 8679651SAndreas.Sandberg@ARM.com ThreadContext *tc) 8689651SAndreas.Sandberg@ARM.com{ 8699651SAndreas.Sandberg@ARM.com int index = 0; 8709651SAndreas.Sandberg@ARM.com int dirfd = process->getSyscallArg(tc, index); 8719651SAndreas.Sandberg@ARM.com if (dirfd != OS::TGT_AT_FDCWD) 8729651SAndreas.Sandberg@ARM.com warn("openat: first argument not AT_FDCWD; unlikely to work"); 8739651SAndreas.Sandberg@ARM.com return readlinkFunc(desc, callnum, process, tc, 1); 8749651SAndreas.Sandberg@ARM.com} 8759651SAndreas.Sandberg@ARM.com 8769651SAndreas.Sandberg@ARM.com/// Target renameat() handler. 8779652SAndreas.Sandberg@ARM.comtemplate <class OS> 8789652SAndreas.Sandberg@ARM.comSyscallReturn 8799652SAndreas.Sandberg@ARM.comrenameatFunc(SyscallDesc *desc, int callnum, Process *process, 8809652SAndreas.Sandberg@ARM.com ThreadContext *tc) 8819652SAndreas.Sandberg@ARM.com{ 8829652SAndreas.Sandberg@ARM.com int index = 0; 8839652SAndreas.Sandberg@ARM.com 8849652SAndreas.Sandberg@ARM.com int olddirfd = process->getSyscallArg(tc, index); 8859652SAndreas.Sandberg@ARM.com if (olddirfd != OS::TGT_AT_FDCWD) 8869652SAndreas.Sandberg@ARM.com warn("renameat: first argument not AT_FDCWD; unlikely to work"); 8879652SAndreas.Sandberg@ARM.com 8889652SAndreas.Sandberg@ARM.com std::string old_name; 8899652SAndreas.Sandberg@ARM.com 8909652SAndreas.Sandberg@ARM.com if (!tc->getMemProxy().tryReadString(old_name, 8919652SAndreas.Sandberg@ARM.com process->getSyscallArg(tc, index))) 8929652SAndreas.Sandberg@ARM.com return -EFAULT; 8939652SAndreas.Sandberg@ARM.com 8949652SAndreas.Sandberg@ARM.com int newdirfd = process->getSyscallArg(tc, index); 8959652SAndreas.Sandberg@ARM.com if (newdirfd != OS::TGT_AT_FDCWD) 8969652SAndreas.Sandberg@ARM.com warn("renameat: third argument not AT_FDCWD; unlikely to work"); 8979652SAndreas.Sandberg@ARM.com 8989652SAndreas.Sandberg@ARM.com std::string new_name; 8999652SAndreas.Sandberg@ARM.com 9009652SAndreas.Sandberg@ARM.com if (!tc->getMemProxy().tryReadString(new_name, 9019651SAndreas.Sandberg@ARM.com process->getSyscallArg(tc, index))) 9029651SAndreas.Sandberg@ARM.com return -EFAULT; 9039651SAndreas.Sandberg@ARM.com 9049651SAndreas.Sandberg@ARM.com // Adjust path for current working directory 9059753Sandreas@sandberg.pp.se old_name = process->fullPath(old_name); 9069651SAndreas.Sandberg@ARM.com new_name = process->fullPath(new_name); 9079753Sandreas@sandberg.pp.se 9089753Sandreas@sandberg.pp.se int result = rename(old_name.c_str(), new_name.c_str()); 9099753Sandreas@sandberg.pp.se return (result == -1) ? -errno : result; 9109651SAndreas.Sandberg@ARM.com} 9119651SAndreas.Sandberg@ARM.com 9129651SAndreas.Sandberg@ARM.com/// Target sysinfo() handler. 9139651SAndreas.Sandberg@ARM.comtemplate <class OS> 9149651SAndreas.Sandberg@ARM.comSyscallReturn 9159651SAndreas.Sandberg@ARM.comsysinfoFunc(SyscallDesc *desc, int callnum, Process *process, 9169651SAndreas.Sandberg@ARM.com ThreadContext *tc) 9179651SAndreas.Sandberg@ARM.com{ 9189753Sandreas@sandberg.pp.se 9199651SAndreas.Sandberg@ARM.com int index = 0; 9209651SAndreas.Sandberg@ARM.com TypedBufferArg<typename OS::tgt_sysinfo> 9219651SAndreas.Sandberg@ARM.com sysinfo(process->getSyscallArg(tc, index)); 9229651SAndreas.Sandberg@ARM.com 9239651SAndreas.Sandberg@ARM.com sysinfo->uptime = seconds_since_epoch; 9249651SAndreas.Sandberg@ARM.com sysinfo->totalram = process->system->memSize(); 9259651SAndreas.Sandberg@ARM.com sysinfo->mem_unit = 1; 9269651SAndreas.Sandberg@ARM.com 9279651SAndreas.Sandberg@ARM.com sysinfo.copyOut(tc->getMemProxy()); 9289651SAndreas.Sandberg@ARM.com 9299651SAndreas.Sandberg@ARM.com return 0; 9309651SAndreas.Sandberg@ARM.com} 9319651SAndreas.Sandberg@ARM.com 9329651SAndreas.Sandberg@ARM.com/// Target chmod() handler. 9339651SAndreas.Sandberg@ARM.comtemplate <class OS> 9349651SAndreas.Sandberg@ARM.comSyscallReturn 9359651SAndreas.Sandberg@ARM.comchmodFunc(SyscallDesc *desc, int callnum, Process *process, 9369651SAndreas.Sandberg@ARM.com ThreadContext *tc) 9379651SAndreas.Sandberg@ARM.com{ 9389753Sandreas@sandberg.pp.se std::string path; 9399651SAndreas.Sandberg@ARM.com 9409651SAndreas.Sandberg@ARM.com int index = 0; 9419651SAndreas.Sandberg@ARM.com if (!tc->getMemProxy().tryReadString(path, 9429651SAndreas.Sandberg@ARM.com process->getSyscallArg(tc, index))) { 9439651SAndreas.Sandberg@ARM.com return -EFAULT; 9449651SAndreas.Sandberg@ARM.com } 9459651SAndreas.Sandberg@ARM.com 9469651SAndreas.Sandberg@ARM.com uint32_t mode = process->getSyscallArg(tc, index); 9479651SAndreas.Sandberg@ARM.com mode_t hostMode = 0; 9489651SAndreas.Sandberg@ARM.com 9499651SAndreas.Sandberg@ARM.com // XXX translate mode flags via OS::something??? 9509651SAndreas.Sandberg@ARM.com hostMode = mode; 9519651SAndreas.Sandberg@ARM.com 9529651SAndreas.Sandberg@ARM.com // Adjust path for current working directory 9539651SAndreas.Sandberg@ARM.com path = process->fullPath(path); 9549651SAndreas.Sandberg@ARM.com 9559651SAndreas.Sandberg@ARM.com // do the chmod 9569651SAndreas.Sandberg@ARM.com int result = chmod(path.c_str(), hostMode); 9579651SAndreas.Sandberg@ARM.com if (result < 0) 9589651SAndreas.Sandberg@ARM.com return -errno; 9599651SAndreas.Sandberg@ARM.com 9609651SAndreas.Sandberg@ARM.com return 0; 9619651SAndreas.Sandberg@ARM.com} 9629651SAndreas.Sandberg@ARM.com 9639651SAndreas.Sandberg@ARM.comtemplate <class OS> 9649689Sandreas@sandberg.pp.seSyscallReturn 9659651SAndreas.Sandberg@ARM.compollFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 9669651SAndreas.Sandberg@ARM.com{ 9679651SAndreas.Sandberg@ARM.com int index = 0; 9689651SAndreas.Sandberg@ARM.com Addr fdsPtr = p->getSyscallArg(tc, index); 9699651SAndreas.Sandberg@ARM.com int nfds = p->getSyscallArg(tc, index); 9709651SAndreas.Sandberg@ARM.com int tmout = p->getSyscallArg(tc, index); 9719651SAndreas.Sandberg@ARM.com 9729651SAndreas.Sandberg@ARM.com BufferArg fdsBuf(fdsPtr, sizeof(struct pollfd) * nfds); 9739651SAndreas.Sandberg@ARM.com fdsBuf.copyIn(tc->getMemProxy()); 9749651SAndreas.Sandberg@ARM.com 9759651SAndreas.Sandberg@ARM.com /** 9769651SAndreas.Sandberg@ARM.com * Record the target file descriptors in a local variable. We need to 9779651SAndreas.Sandberg@ARM.com * replace them with host file descriptors but we need a temporary copy 9789651SAndreas.Sandberg@ARM.com * for later. Afterwards, replace each target file descriptor in the 9799651SAndreas.Sandberg@ARM.com * poll_fd array with its host_fd. 9809651SAndreas.Sandberg@ARM.com */ 9819651SAndreas.Sandberg@ARM.com int temp_tgt_fds[nfds]; 9829651SAndreas.Sandberg@ARM.com for (index = 0; index < nfds; index++) { 9839651SAndreas.Sandberg@ARM.com temp_tgt_fds[index] = ((struct pollfd *)fdsBuf.bufferPtr())[index].fd; 9849651SAndreas.Sandberg@ARM.com auto tgt_fd = temp_tgt_fds[index]; 9859651SAndreas.Sandberg@ARM.com auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 9869651SAndreas.Sandberg@ARM.com if (!hbfdp) 9879651SAndreas.Sandberg@ARM.com return -EBADF; 9889651SAndreas.Sandberg@ARM.com auto host_fd = hbfdp->getSimFD(); 9899651SAndreas.Sandberg@ARM.com ((struct pollfd *)fdsBuf.bufferPtr())[index].fd = host_fd; 9909651SAndreas.Sandberg@ARM.com } 9919651SAndreas.Sandberg@ARM.com 9929651SAndreas.Sandberg@ARM.com /** 9939651SAndreas.Sandberg@ARM.com * We cannot allow an infinite poll to occur or it will inevitably cause 9949689Sandreas@sandberg.pp.se * a deadlock in the gem5 simulator with clone. We must pass in tmout with 9959651SAndreas.Sandberg@ARM.com * a non-negative value, however it also makes no sense to poll on the 9969651SAndreas.Sandberg@ARM.com * underlying host for any other time than tmout a zero timeout. 9979651SAndreas.Sandberg@ARM.com */ 9989651SAndreas.Sandberg@ARM.com int status; 9999651SAndreas.Sandberg@ARM.com if (tmout < 0) { 10009651SAndreas.Sandberg@ARM.com status = poll((struct pollfd *)fdsBuf.bufferPtr(), nfds, 0); 10019651SAndreas.Sandberg@ARM.com if (status == 0) { 10029689Sandreas@sandberg.pp.se /** 10039651SAndreas.Sandberg@ARM.com * If blocking indefinitely, check the signal list to see if a 10049651SAndreas.Sandberg@ARM.com * signal would break the poll out of the retry cycle and try 10059651SAndreas.Sandberg@ARM.com * to return the signal interrupt instead. 10069651SAndreas.Sandberg@ARM.com */ 10079651SAndreas.Sandberg@ARM.com System *sysh = tc->getSystemPtr(); 10089651SAndreas.Sandberg@ARM.com std::list<BasicSignal>::iterator it; 10099651SAndreas.Sandberg@ARM.com for (it=sysh->signalList.begin(); it!=sysh->signalList.end(); it++) 10109651SAndreas.Sandberg@ARM.com if (it->receiver == p) 10119689Sandreas@sandberg.pp.se return -EINTR; 10129651SAndreas.Sandberg@ARM.com return SyscallReturn::retry(); 10139651SAndreas.Sandberg@ARM.com } 10149651SAndreas.Sandberg@ARM.com } else 10159651SAndreas.Sandberg@ARM.com status = poll((struct pollfd *)fdsBuf.bufferPtr(), nfds, 0); 10169651SAndreas.Sandberg@ARM.com 10179651SAndreas.Sandberg@ARM.com if (status == -1) 10189651SAndreas.Sandberg@ARM.com return -errno; 10199760Sandreas@sandberg.pp.se 10209760Sandreas@sandberg.pp.se /** 10219760Sandreas@sandberg.pp.se * Replace each host_fd in the returned poll_fd array with its original 102210653Sandreas.hansson@arm.com * target file descriptor. 102310653Sandreas.hansson@arm.com */ 10249760Sandreas@sandberg.pp.se for (index = 0; index < nfds; index++) { 10259760Sandreas@sandberg.pp.se auto tgt_fd = temp_tgt_fds[index]; 10269760Sandreas@sandberg.pp.se ((struct pollfd *)fdsBuf.bufferPtr())[index].fd = tgt_fd; 10279760Sandreas@sandberg.pp.se } 10289760Sandreas@sandberg.pp.se 10299760Sandreas@sandberg.pp.se /** 10309760Sandreas@sandberg.pp.se * Copy out the pollfd struct because the host may have updated fields 10319760Sandreas@sandberg.pp.se * in the structure. 10329760Sandreas@sandberg.pp.se */ 10339651SAndreas.Sandberg@ARM.com fdsBuf.copyOut(tc->getMemProxy()); 10349651SAndreas.Sandberg@ARM.com 10359651SAndreas.Sandberg@ARM.com return status; 10369651SAndreas.Sandberg@ARM.com} 10379760Sandreas@sandberg.pp.se 10389760Sandreas@sandberg.pp.se/// Target fchmod() handler. 103910157Sandreas@sandberg.pp.setemplate <class OS> 104010157Sandreas@sandberg.pp.seSyscallReturn 104110157Sandreas@sandberg.pp.sefchmodFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 10429882Sandreas@sandberg.pp.se{ 10439882Sandreas@sandberg.pp.se int index = 0; 10449882Sandreas@sandberg.pp.se int tgt_fd = p->getSyscallArg(tc, index); 104510553Salexandru.dutu@amd.com uint32_t mode = p->getSyscallArg(tc, index); 10469925Sandreas@sandberg.pp.se 10479760Sandreas@sandberg.pp.se auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 104810157Sandreas@sandberg.pp.se if (!ffdp) 104910157Sandreas@sandberg.pp.se return -EBADF; 105010157Sandreas@sandberg.pp.se int sim_fd = ffdp->getSimFD(); 105110157Sandreas@sandberg.pp.se 105210157Sandreas@sandberg.pp.se mode_t hostMode = mode; 10539760Sandreas@sandberg.pp.se 10549760Sandreas@sandberg.pp.se int result = fchmod(sim_fd, hostMode); 10559651SAndreas.Sandberg@ARM.com 10569651SAndreas.Sandberg@ARM.com return (result < 0) ? -errno : 0; 10579753Sandreas@sandberg.pp.se} 10589753Sandreas@sandberg.pp.se 10599753Sandreas@sandberg.pp.se/// Target mremap() handler. 10609753Sandreas@sandberg.pp.setemplate <class OS> 10619753Sandreas@sandberg.pp.seSyscallReturn 10629753Sandreas@sandberg.pp.semremapFunc(SyscallDesc *desc, int callnum, Process *process, ThreadContext *tc) 10639753Sandreas@sandberg.pp.se{ 10649753Sandreas@sandberg.pp.se int index = 0; 10659753Sandreas@sandberg.pp.se Addr start = process->getSyscallArg(tc, index); 10669753Sandreas@sandberg.pp.se uint64_t old_length = process->getSyscallArg(tc, index); 10679753Sandreas@sandberg.pp.se uint64_t new_length = process->getSyscallArg(tc, index); 10689753Sandreas@sandberg.pp.se uint64_t flags = process->getSyscallArg(tc, index); 10699753Sandreas@sandberg.pp.se uint64_t provided_address = 0; 10709753Sandreas@sandberg.pp.se bool use_provided_address = flags & OS::TGT_MREMAP_FIXED; 10719753Sandreas@sandberg.pp.se 10729753Sandreas@sandberg.pp.se if (use_provided_address) 10739753Sandreas@sandberg.pp.se provided_address = process->getSyscallArg(tc, index); 10749753Sandreas@sandberg.pp.se 10759753Sandreas@sandberg.pp.se if ((start % TheISA::PageBytes != 0) || 10769753Sandreas@sandberg.pp.se (provided_address % TheISA::PageBytes != 0)) { 10779753Sandreas@sandberg.pp.se warn("mremap failing: arguments not page aligned"); 10789651SAndreas.Sandberg@ARM.com return -EINVAL; 10799651SAndreas.Sandberg@ARM.com } 10809651SAndreas.Sandberg@ARM.com 10819651SAndreas.Sandberg@ARM.com new_length = roundUp(new_length, TheISA::PageBytes); 10829651SAndreas.Sandberg@ARM.com 10839651SAndreas.Sandberg@ARM.com if (new_length > old_length) { 10849651SAndreas.Sandberg@ARM.com std::shared_ptr<MemState> mem_state = process->memState; 10859651SAndreas.Sandberg@ARM.com Addr mmap_end = mem_state->getMmapEnd(); 10869651SAndreas.Sandberg@ARM.com 10879651SAndreas.Sandberg@ARM.com if ((start + old_length) == mmap_end && 10889651SAndreas.Sandberg@ARM.com (!use_provided_address || provided_address == start)) { 10899651SAndreas.Sandberg@ARM.com // This case cannot occur when growing downward, as 10909651SAndreas.Sandberg@ARM.com // start is greater than or equal to mmap_end. 10919651SAndreas.Sandberg@ARM.com uint64_t diff = new_length - old_length; 10929651SAndreas.Sandberg@ARM.com process->allocateMem(mmap_end, diff); 10939651SAndreas.Sandberg@ARM.com mem_state->setMmapEnd(mmap_end + diff); 10949651SAndreas.Sandberg@ARM.com return start; 10959651SAndreas.Sandberg@ARM.com } else { 10969651SAndreas.Sandberg@ARM.com if (!use_provided_address && !(flags & OS::TGT_MREMAP_MAYMOVE)) { 10979651SAndreas.Sandberg@ARM.com warn("can't remap here and MREMAP_MAYMOVE flag not set\n"); 10989651SAndreas.Sandberg@ARM.com return -ENOMEM; 10999651SAndreas.Sandberg@ARM.com } else { 11009651SAndreas.Sandberg@ARM.com uint64_t new_start = provided_address; 11019651SAndreas.Sandberg@ARM.com if (!use_provided_address) { 11029651SAndreas.Sandberg@ARM.com new_start = process->mmapGrowsDown() ? 11039651SAndreas.Sandberg@ARM.com mmap_end - new_length : mmap_end; 11049651SAndreas.Sandberg@ARM.com mmap_end = process->mmapGrowsDown() ? 11059651SAndreas.Sandberg@ARM.com new_start : mmap_end + new_length; 11069651SAndreas.Sandberg@ARM.com mem_state->setMmapEnd(mmap_end); 11079651SAndreas.Sandberg@ARM.com } 11089651SAndreas.Sandberg@ARM.com 11099651SAndreas.Sandberg@ARM.com process->pTable->remap(start, old_length, new_start); 11109651SAndreas.Sandberg@ARM.com warn("mremapping to new vaddr %08p-%08p, adding %d\n", 11119651SAndreas.Sandberg@ARM.com new_start, new_start + new_length, 11129651SAndreas.Sandberg@ARM.com new_length - old_length); 11139651SAndreas.Sandberg@ARM.com // add on the remaining unallocated pages 11149892Sandreas@sandberg.pp.se process->allocateMem(new_start + old_length, 111510114Sandreas@sandberg.pp.se new_length - old_length, 111610073Sandreas@sandberg.pp.se use_provided_address /* clobber */); 111710114Sandreas@sandberg.pp.se if (use_provided_address && 111810073Sandreas@sandberg.pp.se ((new_start + new_length > mem_state->getMmapEnd() && 111910073Sandreas@sandberg.pp.se !process->mmapGrowsDown()) || 112010073Sandreas@sandberg.pp.se (new_start < mem_state->getMmapEnd() && 112110073Sandreas@sandberg.pp.se process->mmapGrowsDown()))) { 112210073Sandreas@sandberg.pp.se // something fishy going on here, at least notify the user 11239892Sandreas@sandberg.pp.se // @todo: increase mmap_end? 11249892Sandreas@sandberg.pp.se warn("mmap region limit exceeded with MREMAP_FIXED\n"); 112510114Sandreas@sandberg.pp.se } 11269892Sandreas@sandberg.pp.se warn("returning %08p as start\n", new_start); 11279892Sandreas@sandberg.pp.se return new_start; 11289892Sandreas@sandberg.pp.se } 11299651SAndreas.Sandberg@ARM.com } 11309651SAndreas.Sandberg@ARM.com } else { 11319651SAndreas.Sandberg@ARM.com if (use_provided_address && provided_address != start) 11329651SAndreas.Sandberg@ARM.com process->pTable->remap(start, new_length, provided_address); 11339651SAndreas.Sandberg@ARM.com process->pTable->unmap(start + new_length, old_length - new_length); 11349651SAndreas.Sandberg@ARM.com return use_provided_address ? provided_address : start; 113510114Sandreas@sandberg.pp.se } 11369651SAndreas.Sandberg@ARM.com} 113710114Sandreas@sandberg.pp.se 11389892Sandreas@sandberg.pp.se/// Target stat() handler. 11399892Sandreas@sandberg.pp.setemplate <class OS> 11409753Sandreas@sandberg.pp.seSyscallReturn 114110073Sandreas@sandberg.pp.sestatFunc(SyscallDesc *desc, int callnum, Process *process, 11429753Sandreas@sandberg.pp.se ThreadContext *tc) 11439753Sandreas@sandberg.pp.se{ 11449753Sandreas@sandberg.pp.se std::string path; 114510114Sandreas@sandberg.pp.se 114610114Sandreas@sandberg.pp.se int index = 0; 114710114Sandreas@sandberg.pp.se if (!tc->getMemProxy().tryReadString(path, 114810114Sandreas@sandberg.pp.se process->getSyscallArg(tc, index))) { 11499753Sandreas@sandberg.pp.se return -EFAULT; 11509753Sandreas@sandberg.pp.se } 11519892Sandreas@sandberg.pp.se Addr bufPtr = process->getSyscallArg(tc, index); 11529753Sandreas@sandberg.pp.se 115310114Sandreas@sandberg.pp.se // Adjust path for current working directory 115410073Sandreas@sandberg.pp.se path = process->fullPath(path); 11559892Sandreas@sandberg.pp.se 11569753Sandreas@sandberg.pp.se struct stat hostBuf; 11579753Sandreas@sandberg.pp.se int result = stat(path.c_str(), &hostBuf); 11589753Sandreas@sandberg.pp.se 11599753Sandreas@sandberg.pp.se if (result < 0) 11609753Sandreas@sandberg.pp.se return -errno; 11619753Sandreas@sandberg.pp.se 11629753Sandreas@sandberg.pp.se copyOutStatBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 11639753Sandreas@sandberg.pp.se 11649753Sandreas@sandberg.pp.se return 0; 11659753Sandreas@sandberg.pp.se} 11669753Sandreas@sandberg.pp.se 11679753Sandreas@sandberg.pp.se 11689753Sandreas@sandberg.pp.se/// Target stat64() handler. 11699753Sandreas@sandberg.pp.setemplate <class OS> 11709753Sandreas@sandberg.pp.seSyscallReturn 11719753Sandreas@sandberg.pp.sestat64Func(SyscallDesc *desc, int callnum, Process *process, 11729753Sandreas@sandberg.pp.se ThreadContext *tc) 11739753Sandreas@sandberg.pp.se{ 11749753Sandreas@sandberg.pp.se std::string path; 11759753Sandreas@sandberg.pp.se 11769753Sandreas@sandberg.pp.se int index = 0; 11779753Sandreas@sandberg.pp.se if (!tc->getMemProxy().tryReadString(path, 11789753Sandreas@sandberg.pp.se process->getSyscallArg(tc, index))) 11799753Sandreas@sandberg.pp.se return -EFAULT; 11809753Sandreas@sandberg.pp.se Addr bufPtr = process->getSyscallArg(tc, index); 11819753Sandreas@sandberg.pp.se 11829753Sandreas@sandberg.pp.se // Adjust path for current working directory 11839753Sandreas@sandberg.pp.se path = process->fullPath(path); 11849651SAndreas.Sandberg@ARM.com 11859651SAndreas.Sandberg@ARM.com#if NO_STAT64 11869651SAndreas.Sandberg@ARM.com struct stat hostBuf; 11879651SAndreas.Sandberg@ARM.com int result = stat(path.c_str(), &hostBuf); 11889651SAndreas.Sandberg@ARM.com#else 11899651SAndreas.Sandberg@ARM.com struct stat64 hostBuf; 11909651SAndreas.Sandberg@ARM.com int result = stat64(path.c_str(), &hostBuf); 11919651SAndreas.Sandberg@ARM.com#endif 11929651SAndreas.Sandberg@ARM.com 11939651SAndreas.Sandberg@ARM.com if (result < 0) 11949655SAndreas.Sandberg@ARM.com return -errno; 11959986Sandreas@sandberg.pp.se 11969986Sandreas@sandberg.pp.se copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 11979986Sandreas@sandberg.pp.se 11989986Sandreas@sandberg.pp.se return 0; 11999986Sandreas@sandberg.pp.se} 12009986Sandreas@sandberg.pp.se 12019655SAndreas.Sandberg@ARM.com 12029655SAndreas.Sandberg@ARM.com/// Target fstatat64() handler. 12039655SAndreas.Sandberg@ARM.comtemplate <class OS> 12049655SAndreas.Sandberg@ARM.comSyscallReturn 12059655SAndreas.Sandberg@ARM.comfstatat64Func(SyscallDesc *desc, int callnum, Process *process, 12069655SAndreas.Sandberg@ARM.com ThreadContext *tc) 12079655SAndreas.Sandberg@ARM.com{ 12089655SAndreas.Sandberg@ARM.com int index = 0; 12099655SAndreas.Sandberg@ARM.com int dirfd = process->getSyscallArg(tc, index); 12109655SAndreas.Sandberg@ARM.com if (dirfd != OS::TGT_AT_FDCWD) 12119651SAndreas.Sandberg@ARM.com warn("fstatat64: first argument not AT_FDCWD; unlikely to work"); 12129651SAndreas.Sandberg@ARM.com 12139651SAndreas.Sandberg@ARM.com std::string path; 12149892Sandreas@sandberg.pp.se if (!tc->getMemProxy().tryReadString(path, 12159651SAndreas.Sandberg@ARM.com process->getSyscallArg(tc, index))) 12169753Sandreas@sandberg.pp.se return -EFAULT; 12179753Sandreas@sandberg.pp.se Addr bufPtr = process->getSyscallArg(tc, index); 12189753Sandreas@sandberg.pp.se 12199753Sandreas@sandberg.pp.se // Adjust path for current working directory 122010913Sandreas.sandberg@arm.com path = process->fullPath(path); 12219753Sandreas@sandberg.pp.se 12229753Sandreas@sandberg.pp.se#if NO_STAT64 12239753Sandreas@sandberg.pp.se struct stat hostBuf; 12249753Sandreas@sandberg.pp.se int result = stat(path.c_str(), &hostBuf); 12259753Sandreas@sandberg.pp.se#else 12269753Sandreas@sandberg.pp.se struct stat64 hostBuf; 12279753Sandreas@sandberg.pp.se int result = stat64(path.c_str(), &hostBuf); 12289753Sandreas@sandberg.pp.se#endif 12299753Sandreas@sandberg.pp.se 12309753Sandreas@sandberg.pp.se if (result < 0) 123110913Sandreas.sandberg@arm.com return -errno; 12329753Sandreas@sandberg.pp.se 12339753Sandreas@sandberg.pp.se copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 12349753Sandreas@sandberg.pp.se 12359753Sandreas@sandberg.pp.se return 0; 12369753Sandreas@sandberg.pp.se} 12379753Sandreas@sandberg.pp.se 12389753Sandreas@sandberg.pp.se 12399753Sandreas@sandberg.pp.se/// Target fstat64() handler. 12409753Sandreas@sandberg.pp.setemplate <class OS> 12419753Sandreas@sandberg.pp.seSyscallReturn 12429753Sandreas@sandberg.pp.sefstat64Func(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 12439753Sandreas@sandberg.pp.se{ 12449753Sandreas@sandberg.pp.se int index = 0; 12459753Sandreas@sandberg.pp.se int tgt_fd = p->getSyscallArg(tc, index); 12469753Sandreas@sandberg.pp.se Addr bufPtr = p->getSyscallArg(tc, index); 12479753Sandreas@sandberg.pp.se 12489892Sandreas@sandberg.pp.se auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 12499892Sandreas@sandberg.pp.se if (!ffdp) 12509892Sandreas@sandberg.pp.se return -EBADF; 12519892Sandreas@sandberg.pp.se int sim_fd = ffdp->getSimFD(); 12529892Sandreas@sandberg.pp.se 12539892Sandreas@sandberg.pp.se#if NO_STAT64 12549892Sandreas@sandberg.pp.se struct stat hostBuf; 12559892Sandreas@sandberg.pp.se int result = fstat(sim_fd, &hostBuf); 12569892Sandreas@sandberg.pp.se#else 12579892Sandreas@sandberg.pp.se struct stat64 hostBuf; 12589892Sandreas@sandberg.pp.se int result = fstat64(sim_fd, &hostBuf); 12599892Sandreas@sandberg.pp.se#endif 12609892Sandreas@sandberg.pp.se 12619892Sandreas@sandberg.pp.se if (result < 0) 12629892Sandreas@sandberg.pp.se return -errno; 12639892Sandreas@sandberg.pp.se 12649892Sandreas@sandberg.pp.se copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf, (sim_fd == 1)); 12659892Sandreas@sandberg.pp.se 12669892Sandreas@sandberg.pp.se return 0; 12679892Sandreas@sandberg.pp.se} 12689892Sandreas@sandberg.pp.se 12699892Sandreas@sandberg.pp.se 12709892Sandreas@sandberg.pp.se/// Target lstat() handler. 12719892Sandreas@sandberg.pp.setemplate <class OS> 12729892Sandreas@sandberg.pp.seSyscallReturn 12739986Sandreas@sandberg.pp.selstatFunc(SyscallDesc *desc, int callnum, Process *process, 12749986Sandreas@sandberg.pp.se ThreadContext *tc) 12759986Sandreas@sandberg.pp.se{ 12769986Sandreas@sandberg.pp.se std::string path; 12779986Sandreas@sandberg.pp.se 12789986Sandreas@sandberg.pp.se int index = 0; 12799892Sandreas@sandberg.pp.se if (!tc->getMemProxy().tryReadString(path, 12809892Sandreas@sandberg.pp.se process->getSyscallArg(tc, index))) { 12819892Sandreas@sandberg.pp.se return -EFAULT; 12829892Sandreas@sandberg.pp.se } 12839892Sandreas@sandberg.pp.se Addr bufPtr = process->getSyscallArg(tc, index); 12849892Sandreas@sandberg.pp.se 12859892Sandreas@sandberg.pp.se // Adjust path for current working directory 12869892Sandreas@sandberg.pp.se path = process->fullPath(path); 12879892Sandreas@sandberg.pp.se 12889892Sandreas@sandberg.pp.se struct stat hostBuf; 12899892Sandreas@sandberg.pp.se int result = lstat(path.c_str(), &hostBuf); 12909892Sandreas@sandberg.pp.se 12919892Sandreas@sandberg.pp.se if (result < 0) 12929892Sandreas@sandberg.pp.se return -errno; 12939892Sandreas@sandberg.pp.se 12949892Sandreas@sandberg.pp.se copyOutStatBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 129510114Sandreas@sandberg.pp.se 12969892Sandreas@sandberg.pp.se return 0; 12979892Sandreas@sandberg.pp.se} 12989892Sandreas@sandberg.pp.se 1299/// Target lstat64() handler. 1300template <class OS> 1301SyscallReturn 1302lstat64Func(SyscallDesc *desc, int callnum, Process *process, 1303 ThreadContext *tc) 1304{ 1305 std::string path; 1306 1307 int index = 0; 1308 if (!tc->getMemProxy().tryReadString(path, 1309 process->getSyscallArg(tc, index))) { 1310 return -EFAULT; 1311 } 1312 Addr bufPtr = process->getSyscallArg(tc, index); 1313 1314 // Adjust path for current working directory 1315 path = process->fullPath(path); 1316 1317#if NO_STAT64 1318 struct stat hostBuf; 1319 int result = lstat(path.c_str(), &hostBuf); 1320#else 1321 struct stat64 hostBuf; 1322 int result = lstat64(path.c_str(), &hostBuf); 1323#endif 1324 1325 if (result < 0) 1326 return -errno; 1327 1328 copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 1329 1330 return 0; 1331} 1332 1333/// Target fstat() handler. 1334template <class OS> 1335SyscallReturn 1336fstatFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 1337{ 1338 int index = 0; 1339 int tgt_fd = p->getSyscallArg(tc, index); 1340 Addr bufPtr = p->getSyscallArg(tc, index); 1341 1342 DPRINTF_SYSCALL(Verbose, "fstat(%d, ...)\n", tgt_fd); 1343 1344 auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 1345 if (!ffdp) 1346 return -EBADF; 1347 int sim_fd = ffdp->getSimFD(); 1348 1349 struct stat hostBuf; 1350 int result = fstat(sim_fd, &hostBuf); 1351 1352 if (result < 0) 1353 return -errno; 1354 1355 copyOutStatBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf, (sim_fd == 1)); 1356 1357 return 0; 1358} 1359 1360/// Target statfs() handler. 1361template <class OS> 1362SyscallReturn 1363statfsFunc(SyscallDesc *desc, int callnum, Process *process, 1364 ThreadContext *tc) 1365{ 1366#if NO_STATFS 1367 warn("Host OS cannot support calls to statfs. Ignoring syscall"); 1368#else 1369 std::string path; 1370 1371 int index = 0; 1372 if (!tc->getMemProxy().tryReadString(path, 1373 process->getSyscallArg(tc, index))) { 1374 return -EFAULT; 1375 } 1376 Addr bufPtr = process->getSyscallArg(tc, index); 1377 1378 // Adjust path for current working directory 1379 path = process->fullPath(path); 1380 1381 struct statfs hostBuf; 1382 int result = statfs(path.c_str(), &hostBuf); 1383 1384 if (result < 0) 1385 return -errno; 1386 1387 copyOutStatfsBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 1388#endif 1389 return 0; 1390} 1391 1392template <class OS> 1393SyscallReturn 1394cloneFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 1395{ 1396 int index = 0; 1397 1398 RegVal flags = p->getSyscallArg(tc, index); 1399 RegVal newStack = p->getSyscallArg(tc, index); 1400 Addr ptidPtr = p->getSyscallArg(tc, index); 1401 1402#if THE_ISA == RISCV_ISA or THE_ISA == ARM_ISA 1403 /** 1404 * Linux sets CLONE_BACKWARDS flag for RISC-V and Arm. 1405 * The flag defines the list of clone() arguments in the following 1406 * order: flags -> newStack -> ptidPtr -> tlsPtr -> ctidPtr 1407 */ 1408 Addr tlsPtr = p->getSyscallArg(tc, index); 1409 Addr ctidPtr = p->getSyscallArg(tc, index); 1410#else 1411 Addr ctidPtr = p->getSyscallArg(tc, index); 1412 Addr tlsPtr = p->getSyscallArg(tc, index); 1413#endif 1414 1415 if (((flags & OS::TGT_CLONE_SIGHAND)&& !(flags & OS::TGT_CLONE_VM)) || 1416 ((flags & OS::TGT_CLONE_THREAD) && !(flags & OS::TGT_CLONE_SIGHAND)) || 1417 ((flags & OS::TGT_CLONE_FS) && (flags & OS::TGT_CLONE_NEWNS)) || 1418 ((flags & OS::TGT_CLONE_NEWIPC) && (flags & OS::TGT_CLONE_SYSVSEM)) || 1419 ((flags & OS::TGT_CLONE_NEWPID) && (flags & OS::TGT_CLONE_THREAD)) || 1420 ((flags & OS::TGT_CLONE_VM) && !(newStack))) 1421 return -EINVAL; 1422 1423 ThreadContext *ctc; 1424 if (!(ctc = p->findFreeContext())) 1425 fatal("clone: no spare thread context in system"); 1426 1427 /** 1428 * Note that ProcessParams is generated by swig and there are no other 1429 * examples of how to create anything but this default constructor. The 1430 * fields are manually initialized instead of passing parameters to the 1431 * constructor. 1432 */ 1433 ProcessParams *pp = new ProcessParams(); 1434 pp->executable.assign(*(new std::string(p->progName()))); 1435 pp->cmd.push_back(*(new std::string(p->progName()))); 1436 pp->system = p->system; 1437 pp->cwd.assign(p->getcwd()); 1438 pp->input.assign("stdin"); 1439 pp->output.assign("stdout"); 1440 pp->errout.assign("stderr"); 1441 pp->uid = p->uid(); 1442 pp->euid = p->euid(); 1443 pp->gid = p->gid(); 1444 pp->egid = p->egid(); 1445 1446 /* Find the first free PID that's less than the maximum */ 1447 std::set<int> const& pids = p->system->PIDs; 1448 int temp_pid = *pids.begin(); 1449 do { 1450 temp_pid++; 1451 } while (pids.find(temp_pid) != pids.end()); 1452 if (temp_pid >= System::maxPID) 1453 fatal("temp_pid is too large: %d", temp_pid); 1454 1455 pp->pid = temp_pid; 1456 pp->ppid = (flags & OS::TGT_CLONE_THREAD) ? p->ppid() : p->pid(); 1457 Process *cp = pp->create(); 1458 delete pp; 1459 1460 Process *owner = ctc->getProcessPtr(); 1461 ctc->setProcessPtr(cp); 1462 cp->assignThreadContext(ctc->contextId()); 1463 owner->revokeThreadContext(ctc->contextId()); 1464 1465 if (flags & OS::TGT_CLONE_PARENT_SETTID) { 1466 BufferArg ptidBuf(ptidPtr, sizeof(long)); 1467 long *ptid = (long *)ptidBuf.bufferPtr(); 1468 *ptid = cp->pid(); 1469 ptidBuf.copyOut(tc->getMemProxy()); 1470 } 1471 1472 cp->initState(); 1473 p->clone(tc, ctc, cp, flags); 1474 1475 if (flags & OS::TGT_CLONE_THREAD) { 1476 delete cp->sigchld; 1477 cp->sigchld = p->sigchld; 1478 } else if (flags & OS::TGT_SIGCHLD) { 1479 *cp->sigchld = true; 1480 } 1481 1482 if (flags & OS::TGT_CLONE_CHILD_SETTID) { 1483 BufferArg ctidBuf(ctidPtr, sizeof(long)); 1484 long *ctid = (long *)ctidBuf.bufferPtr(); 1485 *ctid = cp->pid(); 1486 ctidBuf.copyOut(ctc->getMemProxy()); 1487 } 1488 1489 if (flags & OS::TGT_CLONE_CHILD_CLEARTID) 1490 cp->childClearTID = (uint64_t)ctidPtr; 1491 1492 ctc->clearArchRegs(); 1493 1494 OS::archClone(flags, p, cp, tc, ctc, newStack, tlsPtr); 1495 1496 cp->setSyscallReturn(ctc, 0); 1497 1498#if THE_ISA == ALPHA_ISA 1499 ctc->setIntReg(TheISA::SyscallSuccessReg, 0); 1500#elif THE_ISA == SPARC_ISA 1501 tc->setIntReg(TheISA::SyscallPseudoReturnReg, 0); 1502 ctc->setIntReg(TheISA::SyscallPseudoReturnReg, 1); 1503#endif 1504 1505 TheISA::PCState cpc = tc->pcState(); 1506 cpc.advance(); 1507 ctc->pcState(cpc); 1508 ctc->activate(); 1509 1510 return cp->pid(); 1511} 1512 1513/// Target fstatfs() handler. 1514template <class OS> 1515SyscallReturn 1516fstatfsFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 1517{ 1518 int index = 0; 1519 int tgt_fd = p->getSyscallArg(tc, index); 1520 Addr bufPtr = p->getSyscallArg(tc, index); 1521 1522 auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 1523 if (!ffdp) 1524 return -EBADF; 1525 int sim_fd = ffdp->getSimFD(); 1526 1527 struct statfs hostBuf; 1528 int result = fstatfs(sim_fd, &hostBuf); 1529 1530 if (result < 0) 1531 return -errno; 1532 1533 copyOutStatfsBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf); 1534 1535 return 0; 1536} 1537 1538/// Target readv() handler. 1539template <class OS> 1540SyscallReturn 1541readvFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 1542{ 1543 int index = 0; 1544 int tgt_fd = p->getSyscallArg(tc, index); 1545 1546 auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 1547 if (!ffdp) 1548 return -EBADF; 1549 int sim_fd = ffdp->getSimFD(); 1550 1551 SETranslatingPortProxy &prox = tc->getMemProxy(); 1552 uint64_t tiov_base = p->getSyscallArg(tc, index); 1553 size_t count = p->getSyscallArg(tc, index); 1554 typename OS::tgt_iovec tiov[count]; 1555 struct iovec hiov[count]; 1556 for (size_t i = 0; i < count; ++i) { 1557 prox.readBlob(tiov_base + (i * sizeof(typename OS::tgt_iovec)), 1558 (uint8_t*)&tiov[i], sizeof(typename OS::tgt_iovec)); 1559 hiov[i].iov_len = TheISA::gtoh(tiov[i].iov_len); 1560 hiov[i].iov_base = new char [hiov[i].iov_len]; 1561 } 1562 1563 int result = readv(sim_fd, hiov, count); 1564 int local_errno = errno; 1565 1566 for (size_t i = 0; i < count; ++i) { 1567 if (result != -1) { 1568 prox.writeBlob(TheISA::htog(tiov[i].iov_base), 1569 (uint8_t*)hiov[i].iov_base, hiov[i].iov_len); 1570 } 1571 delete [] (char *)hiov[i].iov_base; 1572 } 1573 1574 return (result == -1) ? -local_errno : result; 1575} 1576 1577/// Target writev() handler. 1578template <class OS> 1579SyscallReturn 1580writevFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 1581{ 1582 int index = 0; 1583 int tgt_fd = p->getSyscallArg(tc, index); 1584 1585 auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 1586 if (!hbfdp) 1587 return -EBADF; 1588 int sim_fd = hbfdp->getSimFD(); 1589 1590 SETranslatingPortProxy &prox = tc->getMemProxy(); 1591 uint64_t tiov_base = p->getSyscallArg(tc, index); 1592 size_t count = p->getSyscallArg(tc, index); 1593 struct iovec hiov[count]; 1594 for (size_t i = 0; i < count; ++i) { 1595 typename OS::tgt_iovec tiov; 1596 1597 prox.readBlob(tiov_base + i*sizeof(typename OS::tgt_iovec), 1598 (uint8_t*)&tiov, sizeof(typename OS::tgt_iovec)); 1599 hiov[i].iov_len = TheISA::gtoh(tiov.iov_len); 1600 hiov[i].iov_base = new char [hiov[i].iov_len]; 1601 prox.readBlob(TheISA::gtoh(tiov.iov_base), (uint8_t *)hiov[i].iov_base, 1602 hiov[i].iov_len); 1603 } 1604 1605 int result = writev(sim_fd, hiov, count); 1606 1607 for (size_t i = 0; i < count; ++i) 1608 delete [] (char *)hiov[i].iov_base; 1609 1610 return (result == -1) ? -errno : result; 1611} 1612 1613/// Real mmap handler. 1614template <class OS> 1615SyscallReturn 1616mmapImpl(SyscallDesc *desc, int num, Process *p, ThreadContext *tc, 1617 bool is_mmap2) 1618{ 1619 int index = 0; 1620 Addr start = p->getSyscallArg(tc, index); 1621 uint64_t length = p->getSyscallArg(tc, index); 1622 int prot = p->getSyscallArg(tc, index); 1623 int tgt_flags = p->getSyscallArg(tc, index); 1624 int tgt_fd = p->getSyscallArg(tc, index); 1625 int offset = p->getSyscallArg(tc, index); 1626 1627 if (is_mmap2) 1628 offset *= TheISA::PageBytes; 1629 1630 if (start & (TheISA::PageBytes - 1) || 1631 offset & (TheISA::PageBytes - 1) || 1632 (tgt_flags & OS::TGT_MAP_PRIVATE && 1633 tgt_flags & OS::TGT_MAP_SHARED) || 1634 (!(tgt_flags & OS::TGT_MAP_PRIVATE) && 1635 !(tgt_flags & OS::TGT_MAP_SHARED)) || 1636 !length) { 1637 return -EINVAL; 1638 } 1639 1640 if ((prot & PROT_WRITE) && (tgt_flags & OS::TGT_MAP_SHARED)) { 1641 // With shared mmaps, there are two cases to consider: 1642 // 1) anonymous: writes should modify the mapping and this should be 1643 // visible to observers who share the mapping. Currently, it's 1644 // difficult to update the shared mapping because there's no 1645 // structure which maintains information about the which virtual 1646 // memory areas are shared. If that structure existed, it would be 1647 // possible to make the translations point to the same frames. 1648 // 2) file-backed: writes should modify the mapping and the file 1649 // which is backed by the mapping. The shared mapping problem is the 1650 // same as what was mentioned about the anonymous mappings. For 1651 // file-backed mappings, the writes to the file are difficult 1652 // because it requires syncing what the mapping holds with the file 1653 // that resides on the host system. So, any write on a real system 1654 // would cause the change to be propagated to the file mapping at 1655 // some point in the future (the inode is tracked along with the 1656 // mapping). This isn't guaranteed to always happen, but it usually 1657 // works well enough. The guarantee is provided by the msync system 1658 // call. We could force the change through with shared mappings with 1659 // a call to msync, but that again would require more information 1660 // than we currently maintain. 1661 warn("mmap: writing to shared mmap region is currently " 1662 "unsupported. The write succeeds on the target, but it " 1663 "will not be propagated to the host or shared mappings"); 1664 } 1665 1666 length = roundUp(length, TheISA::PageBytes); 1667 1668 int sim_fd = -1; 1669 uint8_t *pmap = nullptr; 1670 if (!(tgt_flags & OS::TGT_MAP_ANONYMOUS)) { 1671 std::shared_ptr<FDEntry> fdep = (*p->fds)[tgt_fd]; 1672 1673 auto dfdp = std::dynamic_pointer_cast<DeviceFDEntry>(fdep); 1674 if (dfdp) { 1675 EmulatedDriver *emul_driver = dfdp->getDriver(); 1676 return emul_driver->mmap(p, tc, start, length, prot, 1677 tgt_flags, tgt_fd, offset); 1678 } 1679 1680 auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(fdep); 1681 if (!ffdp) 1682 return -EBADF; 1683 sim_fd = ffdp->getSimFD(); 1684 1685 pmap = (decltype(pmap))mmap(nullptr, length, PROT_READ, MAP_PRIVATE, 1686 sim_fd, offset); 1687 1688 if (pmap == (decltype(pmap))-1) { 1689 warn("mmap: failed to map file into host address space"); 1690 return -errno; 1691 } 1692 } 1693 1694 // Extend global mmap region if necessary. Note that we ignore the 1695 // start address unless MAP_FIXED is specified. 1696 if (!(tgt_flags & OS::TGT_MAP_FIXED)) { 1697 std::shared_ptr<MemState> mem_state = p->memState; 1698 Addr mmap_end = mem_state->getMmapEnd(); 1699 1700 start = p->mmapGrowsDown() ? mmap_end - length : mmap_end; 1701 mmap_end = p->mmapGrowsDown() ? start : mmap_end + length; 1702 1703 mem_state->setMmapEnd(mmap_end); 1704 } 1705 1706 DPRINTF_SYSCALL(Verbose, " mmap range is 0x%x - 0x%x\n", 1707 start, start + length - 1); 1708 1709 // We only allow mappings to overwrite existing mappings if 1710 // TGT_MAP_FIXED is set. Otherwise it shouldn't be a problem 1711 // because we ignore the start hint if TGT_MAP_FIXED is not set. 1712 int clobber = tgt_flags & OS::TGT_MAP_FIXED; 1713 if (clobber) { 1714 for (auto tc : p->system->threadContexts) { 1715 // If we might be overwriting old mappings, we need to 1716 // invalidate potentially stale mappings out of the TLBs. 1717 tc->getDTBPtr()->flushAll(); 1718 tc->getITBPtr()->flushAll(); 1719 } 1720 } 1721 1722 // Allocate physical memory and map it in. If the page table is already 1723 // mapped and clobber is not set, the simulator will issue throw a 1724 // fatal and bail out of the simulation. 1725 p->allocateMem(start, length, clobber); 1726 1727 // Transfer content into target address space. 1728 SETranslatingPortProxy &tp = tc->getMemProxy(); 1729 if (tgt_flags & OS::TGT_MAP_ANONYMOUS) { 1730 // In general, we should zero the mapped area for anonymous mappings, 1731 // with something like: 1732 // tp.memsetBlob(start, 0, length); 1733 // However, given that we don't support sparse mappings, and 1734 // some applications can map a couple of gigabytes of space 1735 // (intending sparse usage), that can get painfully expensive. 1736 // Fortunately, since we don't properly implement munmap either, 1737 // there's no danger of remapping used memory, so for now all 1738 // newly mapped memory should already be zeroed so we can skip it. 1739 } else { 1740 // It is possible to mmap an area larger than a file, however 1741 // accessing unmapped portions the system triggers a "Bus error" 1742 // on the host. We must know when to stop copying the file from 1743 // the host into the target address space. 1744 struct stat file_stat; 1745 if (fstat(sim_fd, &file_stat) > 0) 1746 fatal("mmap: cannot stat file"); 1747 1748 // Copy the portion of the file that is resident. This requires 1749 // checking both the mmap size and the filesize that we are 1750 // trying to mmap into this space; the mmap size also depends 1751 // on the specified offset into the file. 1752 uint64_t size = std::min((uint64_t)file_stat.st_size - offset, 1753 length); 1754 tp.writeBlob(start, pmap, size); 1755 1756 // Cleanup the mmap region before exiting this function. 1757 munmap(pmap, length); 1758 1759 // Maintain the symbol table for dynamic executables. 1760 // The loader will call mmap to map the images into its address 1761 // space and we intercept that here. We can verify that we are 1762 // executing inside the loader by checking the program counter value. 1763 // XXX: with multiprogrammed workloads or multi-node configurations, 1764 // this will not work since there is a single global symbol table. 1765 ObjectFile *interpreter = p->getInterpreter(); 1766 if (interpreter) { 1767 Addr text_start = interpreter->textBase(); 1768 Addr text_end = text_start + interpreter->textSize(); 1769 1770 Addr pc = tc->pcState().pc(); 1771 1772 if (pc >= text_start && pc < text_end) { 1773 std::shared_ptr<FDEntry> fdep = (*p->fds)[tgt_fd]; 1774 auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(fdep); 1775 ObjectFile *lib = createObjectFile(ffdp->getFileName()); 1776 1777 if (lib) { 1778 lib->loadAllSymbols(debugSymbolTable, 1779 lib->textBase(), start); 1780 } 1781 } 1782 } 1783 1784 // Note that we do not zero out the remainder of the mapping. This 1785 // is done by a real system, but it probably will not affect 1786 // execution (hopefully). 1787 } 1788 1789 return start; 1790} 1791 1792template <class OS> 1793SyscallReturn 1794pwrite64Func(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 1795{ 1796 int index = 0; 1797 int tgt_fd = p->getSyscallArg(tc, index); 1798 Addr bufPtr = p->getSyscallArg(tc, index); 1799 int nbytes = p->getSyscallArg(tc, index); 1800 int offset = p->getSyscallArg(tc, index); 1801 1802 auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]); 1803 if (!ffdp) 1804 return -EBADF; 1805 int sim_fd = ffdp->getSimFD(); 1806 1807 BufferArg bufArg(bufPtr, nbytes); 1808 bufArg.copyIn(tc->getMemProxy()); 1809 1810 int bytes_written = pwrite(sim_fd, bufArg.bufferPtr(), nbytes, offset); 1811 1812 return (bytes_written == -1) ? -errno : bytes_written; 1813} 1814 1815/// Target mmap() handler. 1816template <class OS> 1817SyscallReturn 1818mmapFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 1819{ 1820 return mmapImpl<OS>(desc, num, p, tc, false); 1821} 1822 1823/// Target mmap2() handler. 1824template <class OS> 1825SyscallReturn 1826mmap2Func(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 1827{ 1828 return mmapImpl<OS>(desc, num, p, tc, true); 1829} 1830 1831/// Target getrlimit() handler. 1832template <class OS> 1833SyscallReturn 1834getrlimitFunc(SyscallDesc *desc, int callnum, Process *process, 1835 ThreadContext *tc) 1836{ 1837 int index = 0; 1838 unsigned resource = process->getSyscallArg(tc, index); 1839 TypedBufferArg<typename OS::rlimit> rlp(process->getSyscallArg(tc, index)); 1840 1841 switch (resource) { 1842 case OS::TGT_RLIMIT_STACK: 1843 // max stack size in bytes: make up a number (8MB for now) 1844 rlp->rlim_cur = rlp->rlim_max = 8 * 1024 * 1024; 1845 rlp->rlim_cur = TheISA::htog(rlp->rlim_cur); 1846 rlp->rlim_max = TheISA::htog(rlp->rlim_max); 1847 break; 1848 1849 case OS::TGT_RLIMIT_DATA: 1850 // max data segment size in bytes: make up a number 1851 rlp->rlim_cur = rlp->rlim_max = 256 * 1024 * 1024; 1852 rlp->rlim_cur = TheISA::htog(rlp->rlim_cur); 1853 rlp->rlim_max = TheISA::htog(rlp->rlim_max); 1854 break; 1855 1856 default: 1857 warn("getrlimit: unimplemented resource %d", resource); 1858 return -EINVAL; 1859 break; 1860 } 1861 1862 rlp.copyOut(tc->getMemProxy()); 1863 return 0; 1864} 1865 1866template <class OS> 1867SyscallReturn 1868prlimitFunc(SyscallDesc *desc, int callnum, Process *process, 1869 ThreadContext *tc) 1870{ 1871 int index = 0; 1872 if (process->getSyscallArg(tc, index) != 0) 1873 { 1874 warn("prlimit: ignoring rlimits for nonzero pid"); 1875 return -EPERM; 1876 } 1877 int resource = process->getSyscallArg(tc, index); 1878 Addr n = process->getSyscallArg(tc, index); 1879 if (n != 0) 1880 warn("prlimit: ignoring new rlimit"); 1881 Addr o = process->getSyscallArg(tc, index); 1882 if (o != 0) 1883 { 1884 TypedBufferArg<typename OS::rlimit> rlp(o); 1885 switch (resource) { 1886 case OS::TGT_RLIMIT_STACK: 1887 // max stack size in bytes: make up a number (8MB for now) 1888 rlp->rlim_cur = rlp->rlim_max = 8 * 1024 * 1024; 1889 rlp->rlim_cur = TheISA::htog(rlp->rlim_cur); 1890 rlp->rlim_max = TheISA::htog(rlp->rlim_max); 1891 break; 1892 case OS::TGT_RLIMIT_DATA: 1893 // max data segment size in bytes: make up a number 1894 rlp->rlim_cur = rlp->rlim_max = 256*1024*1024; 1895 rlp->rlim_cur = TheISA::htog(rlp->rlim_cur); 1896 rlp->rlim_max = TheISA::htog(rlp->rlim_max); 1897 break; 1898 default: 1899 warn("prlimit: unimplemented resource %d", resource); 1900 return -EINVAL; 1901 break; 1902 } 1903 rlp.copyOut(tc->getMemProxy()); 1904 } 1905 return 0; 1906} 1907 1908/// Target clock_gettime() function. 1909template <class OS> 1910SyscallReturn 1911clock_gettimeFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 1912{ 1913 int index = 1; 1914 //int clk_id = p->getSyscallArg(tc, index); 1915 TypedBufferArg<typename OS::timespec> tp(p->getSyscallArg(tc, index)); 1916 1917 getElapsedTimeNano(tp->tv_sec, tp->tv_nsec); 1918 tp->tv_sec += seconds_since_epoch; 1919 tp->tv_sec = TheISA::htog(tp->tv_sec); 1920 tp->tv_nsec = TheISA::htog(tp->tv_nsec); 1921 1922 tp.copyOut(tc->getMemProxy()); 1923 1924 return 0; 1925} 1926 1927/// Target clock_getres() function. 1928template <class OS> 1929SyscallReturn 1930clock_getresFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 1931{ 1932 int index = 1; 1933 TypedBufferArg<typename OS::timespec> tp(p->getSyscallArg(tc, index)); 1934 1935 // Set resolution at ns, which is what clock_gettime() returns 1936 tp->tv_sec = 0; 1937 tp->tv_nsec = 1; 1938 1939 tp.copyOut(tc->getMemProxy()); 1940 1941 return 0; 1942} 1943 1944/// Target gettimeofday() handler. 1945template <class OS> 1946SyscallReturn 1947gettimeofdayFunc(SyscallDesc *desc, int callnum, Process *process, 1948 ThreadContext *tc) 1949{ 1950 int index = 0; 1951 TypedBufferArg<typename OS::timeval> tp(process->getSyscallArg(tc, index)); 1952 1953 getElapsedTimeMicro(tp->tv_sec, tp->tv_usec); 1954 tp->tv_sec += seconds_since_epoch; 1955 tp->tv_sec = TheISA::htog(tp->tv_sec); 1956 tp->tv_usec = TheISA::htog(tp->tv_usec); 1957 1958 tp.copyOut(tc->getMemProxy()); 1959 1960 return 0; 1961} 1962 1963 1964/// Target utimes() handler. 1965template <class OS> 1966SyscallReturn 1967utimesFunc(SyscallDesc *desc, int callnum, Process *process, 1968 ThreadContext *tc) 1969{ 1970 std::string path; 1971 1972 int index = 0; 1973 if (!tc->getMemProxy().tryReadString(path, 1974 process->getSyscallArg(tc, index))) { 1975 return -EFAULT; 1976 } 1977 1978 TypedBufferArg<typename OS::timeval [2]> 1979 tp(process->getSyscallArg(tc, index)); 1980 tp.copyIn(tc->getMemProxy()); 1981 1982 struct timeval hostTimeval[2]; 1983 for (int i = 0; i < 2; ++i) { 1984 hostTimeval[i].tv_sec = TheISA::gtoh((*tp)[i].tv_sec); 1985 hostTimeval[i].tv_usec = TheISA::gtoh((*tp)[i].tv_usec); 1986 } 1987 1988 // Adjust path for current working directory 1989 path = process->fullPath(path); 1990 1991 int result = utimes(path.c_str(), hostTimeval); 1992 1993 if (result < 0) 1994 return -errno; 1995 1996 return 0; 1997} 1998 1999template <class OS> 2000SyscallReturn 2001execveFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 2002{ 2003 desc->setFlags(0); 2004 2005 int index = 0; 2006 std::string path; 2007 SETranslatingPortProxy & mem_proxy = tc->getMemProxy(); 2008 if (!mem_proxy.tryReadString(path, p->getSyscallArg(tc, index))) 2009 return -EFAULT; 2010 2011 if (access(path.c_str(), F_OK) == -1) 2012 return -EACCES; 2013 2014 auto read_in = [](std::vector<std::string> & vect, 2015 SETranslatingPortProxy & mem_proxy, 2016 Addr mem_loc) 2017 { 2018 for (int inc = 0; ; inc++) { 2019 BufferArg b((mem_loc + sizeof(Addr) * inc), sizeof(Addr)); 2020 b.copyIn(mem_proxy); 2021 2022 if (!*(Addr*)b.bufferPtr()) 2023 break; 2024 2025 vect.push_back(std::string()); 2026 mem_proxy.tryReadString(vect[inc], *(Addr*)b.bufferPtr()); 2027 } 2028 }; 2029 2030 /** 2031 * Note that ProcessParams is generated by swig and there are no other 2032 * examples of how to create anything but this default constructor. The 2033 * fields are manually initialized instead of passing parameters to the 2034 * constructor. 2035 */ 2036 ProcessParams *pp = new ProcessParams(); 2037 pp->executable = path; 2038 Addr argv_mem_loc = p->getSyscallArg(tc, index); 2039 read_in(pp->cmd, mem_proxy, argv_mem_loc); 2040 Addr envp_mem_loc = p->getSyscallArg(tc, index); 2041 read_in(pp->env, mem_proxy, envp_mem_loc); 2042 pp->uid = p->uid(); 2043 pp->egid = p->egid(); 2044 pp->euid = p->euid(); 2045 pp->gid = p->gid(); 2046 pp->ppid = p->ppid(); 2047 pp->pid = p->pid(); 2048 pp->input.assign("cin"); 2049 pp->output.assign("cout"); 2050 pp->errout.assign("cerr"); 2051 pp->cwd.assign(p->getcwd()); 2052 pp->system = p->system; 2053 /** 2054 * Prevent process object creation with identical PIDs (which will trip 2055 * a fatal check in Process constructor). The execve call is supposed to 2056 * take over the currently executing process' identity but replace 2057 * whatever it is doing with a new process image. Instead of hijacking 2058 * the process object in the simulator, we create a new process object 2059 * and bind to the previous process' thread below (hijacking the thread). 2060 */ 2061 p->system->PIDs.erase(p->pid()); 2062 Process *new_p = pp->create(); 2063 delete pp; 2064 2065 /** 2066 * Work through the file descriptor array and close any files marked 2067 * close-on-exec. 2068 */ 2069 new_p->fds = p->fds; 2070 for (int i = 0; i < new_p->fds->getSize(); i++) { 2071 std::shared_ptr<FDEntry> fdep = (*new_p->fds)[i]; 2072 if (fdep && fdep->getCOE()) 2073 new_p->fds->closeFDEntry(i); 2074 } 2075 2076 *new_p->sigchld = true; 2077 2078 delete p; 2079 tc->clearArchRegs(); 2080 tc->setProcessPtr(new_p); 2081 new_p->assignThreadContext(tc->contextId()); 2082 new_p->initState(); 2083 tc->activate(); 2084 TheISA::PCState pcState = tc->pcState(); 2085 tc->setNPC(pcState.instAddr()); 2086 2087 desc->setFlags(SyscallDesc::SuppressReturnValue); 2088 return 0; 2089} 2090 2091/// Target getrusage() function. 2092template <class OS> 2093SyscallReturn 2094getrusageFunc(SyscallDesc *desc, int callnum, Process *process, 2095 ThreadContext *tc) 2096{ 2097 int index = 0; 2098 int who = process->getSyscallArg(tc, index); // THREAD, SELF, or CHILDREN 2099 TypedBufferArg<typename OS::rusage> rup(process->getSyscallArg(tc, index)); 2100 2101 rup->ru_utime.tv_sec = 0; 2102 rup->ru_utime.tv_usec = 0; 2103 rup->ru_stime.tv_sec = 0; 2104 rup->ru_stime.tv_usec = 0; 2105 rup->ru_maxrss = 0; 2106 rup->ru_ixrss = 0; 2107 rup->ru_idrss = 0; 2108 rup->ru_isrss = 0; 2109 rup->ru_minflt = 0; 2110 rup->ru_majflt = 0; 2111 rup->ru_nswap = 0; 2112 rup->ru_inblock = 0; 2113 rup->ru_oublock = 0; 2114 rup->ru_msgsnd = 0; 2115 rup->ru_msgrcv = 0; 2116 rup->ru_nsignals = 0; 2117 rup->ru_nvcsw = 0; 2118 rup->ru_nivcsw = 0; 2119 2120 switch (who) { 2121 case OS::TGT_RUSAGE_SELF: 2122 getElapsedTimeMicro(rup->ru_utime.tv_sec, rup->ru_utime.tv_usec); 2123 rup->ru_utime.tv_sec = TheISA::htog(rup->ru_utime.tv_sec); 2124 rup->ru_utime.tv_usec = TheISA::htog(rup->ru_utime.tv_usec); 2125 break; 2126 2127 case OS::TGT_RUSAGE_CHILDREN: 2128 // do nothing. We have no child processes, so they take no time. 2129 break; 2130 2131 default: 2132 // don't really handle THREAD or CHILDREN, but just warn and 2133 // plow ahead 2134 warn("getrusage() only supports RUSAGE_SELF. Parameter %d ignored.", 2135 who); 2136 } 2137 2138 rup.copyOut(tc->getMemProxy()); 2139 2140 return 0; 2141} 2142 2143/// Target times() function. 2144template <class OS> 2145SyscallReturn 2146timesFunc(SyscallDesc *desc, int callnum, Process *process, 2147 ThreadContext *tc) 2148{ 2149 int index = 0; 2150 TypedBufferArg<typename OS::tms> bufp(process->getSyscallArg(tc, index)); 2151 2152 // Fill in the time structure (in clocks) 2153 int64_t clocks = curTick() * OS::M5_SC_CLK_TCK / SimClock::Int::s; 2154 bufp->tms_utime = clocks; 2155 bufp->tms_stime = 0; 2156 bufp->tms_cutime = 0; 2157 bufp->tms_cstime = 0; 2158 2159 // Convert to host endianness 2160 bufp->tms_utime = TheISA::htog(bufp->tms_utime); 2161 2162 // Write back 2163 bufp.copyOut(tc->getMemProxy()); 2164 2165 // Return clock ticks since system boot 2166 return clocks; 2167} 2168 2169/// Target time() function. 2170template <class OS> 2171SyscallReturn 2172timeFunc(SyscallDesc *desc, int callnum, Process *process, ThreadContext *tc) 2173{ 2174 typename OS::time_t sec, usec; 2175 getElapsedTimeMicro(sec, usec); 2176 sec += seconds_since_epoch; 2177 2178 int index = 0; 2179 Addr taddr = (Addr)process->getSyscallArg(tc, index); 2180 if (taddr != 0) { 2181 typename OS::time_t t = sec; 2182 t = TheISA::htog(t); 2183 SETranslatingPortProxy &p = tc->getMemProxy(); 2184 p.writeBlob(taddr, (uint8_t*)&t, (int)sizeof(typename OS::time_t)); 2185 } 2186 return sec; 2187} 2188 2189template <class OS> 2190SyscallReturn 2191tgkillFunc(SyscallDesc *desc, int num, Process *process, ThreadContext *tc) 2192{ 2193 int index = 0; 2194 int tgid = process->getSyscallArg(tc, index); 2195 int tid = process->getSyscallArg(tc, index); 2196 int sig = process->getSyscallArg(tc, index); 2197 2198 /** 2199 * This system call is intended to allow killing a specific thread 2200 * within an arbitrary thread group if sanctioned with permission checks. 2201 * It's usually true that threads share the termination signal as pointed 2202 * out by the pthread_kill man page and this seems to be the intended 2203 * usage. Due to this being an emulated environment, assume the following: 2204 * Threads are allowed to call tgkill because the EUID for all threads 2205 * should be the same. There is no signal handling mechanism for kernel 2206 * registration of signal handlers since signals are poorly supported in 2207 * emulation mode. Since signal handlers cannot be registered, all 2208 * threads within in a thread group must share the termination signal. 2209 * We never exhaust PIDs so there's no chance of finding the wrong one 2210 * due to PID rollover. 2211 */ 2212 2213 System *sys = tc->getSystemPtr(); 2214 Process *tgt_proc = nullptr; 2215 for (int i = 0; i < sys->numContexts(); i++) { 2216 Process *temp = sys->threadContexts[i]->getProcessPtr(); 2217 if (temp->pid() == tid) { 2218 tgt_proc = temp; 2219 break; 2220 } 2221 } 2222 2223 if (sig != 0 || sig != OS::TGT_SIGABRT) 2224 return -EINVAL; 2225 2226 if (tgt_proc == nullptr) 2227 return -ESRCH; 2228 2229 if (tgid != -1 && tgt_proc->tgid() != tgid) 2230 return -ESRCH; 2231 2232 if (sig == OS::TGT_SIGABRT) 2233 exitGroupFunc(desc, 252, process, tc); 2234 2235 return 0; 2236} 2237 2238template <class OS> 2239SyscallReturn 2240socketFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 2241{ 2242 int index = 0; 2243 int domain = p->getSyscallArg(tc, index); 2244 int type = p->getSyscallArg(tc, index); 2245 int prot = p->getSyscallArg(tc, index); 2246 2247 int sim_fd = socket(domain, type, prot); 2248 if (sim_fd == -1) 2249 return -errno; 2250 2251 auto sfdp = std::make_shared<SocketFDEntry>(sim_fd, domain, type, prot); 2252 int tgt_fd = p->fds->allocFD(sfdp); 2253 2254 return tgt_fd; 2255} 2256 2257template <class OS> 2258SyscallReturn 2259socketpairFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 2260{ 2261 int index = 0; 2262 int domain = p->getSyscallArg(tc, index); 2263 int type = p->getSyscallArg(tc, index); 2264 int prot = p->getSyscallArg(tc, index); 2265 Addr svPtr = p->getSyscallArg(tc, index); 2266 2267 BufferArg svBuf((Addr)svPtr, 2 * sizeof(int)); 2268 int status = socketpair(domain, type, prot, (int *)svBuf.bufferPtr()); 2269 if (status == -1) 2270 return -errno; 2271 2272 int *fds = (int *)svBuf.bufferPtr(); 2273 2274 auto sfdp1 = std::make_shared<SocketFDEntry>(fds[0], domain, type, prot); 2275 fds[0] = p->fds->allocFD(sfdp1); 2276 auto sfdp2 = std::make_shared<SocketFDEntry>(fds[1], domain, type, prot); 2277 fds[1] = p->fds->allocFD(sfdp2); 2278 svBuf.copyOut(tc->getMemProxy()); 2279 2280 return status; 2281} 2282 2283template <class OS> 2284SyscallReturn 2285selectFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc) 2286{ 2287 int retval; 2288 2289 int index = 0; 2290 int nfds_t = p->getSyscallArg(tc, index); 2291 Addr fds_read_ptr = p->getSyscallArg(tc, index); 2292 Addr fds_writ_ptr = p->getSyscallArg(tc, index); 2293 Addr fds_excp_ptr = p->getSyscallArg(tc, index); 2294 Addr time_val_ptr = p->getSyscallArg(tc, index); 2295 2296 TypedBufferArg<typename OS::fd_set> rd_t(fds_read_ptr); 2297 TypedBufferArg<typename OS::fd_set> wr_t(fds_writ_ptr); 2298 TypedBufferArg<typename OS::fd_set> ex_t(fds_excp_ptr); 2299 TypedBufferArg<typename OS::timeval> tp(time_val_ptr); 2300 2301 /** 2302 * Host fields. Notice that these use the definitions from the system 2303 * headers instead of the gem5 headers and libraries. If the host and 2304 * target have different header file definitions, this will not work. 2305 */ 2306 fd_set rd_h; 2307 FD_ZERO(&rd_h); 2308 fd_set wr_h; 2309 FD_ZERO(&wr_h); 2310 fd_set ex_h; 2311 FD_ZERO(&ex_h); 2312 2313 /** 2314 * Copy in the fd_set from the target. 2315 */ 2316 if (fds_read_ptr) 2317 rd_t.copyIn(tc->getMemProxy()); 2318 if (fds_writ_ptr) 2319 wr_t.copyIn(tc->getMemProxy()); 2320 if (fds_excp_ptr) 2321 ex_t.copyIn(tc->getMemProxy()); 2322 2323 /** 2324 * We need to translate the target file descriptor set into a host file 2325 * descriptor set. This involves both our internal process fd array 2326 * and the fd_set defined in Linux header files. The nfds field also 2327 * needs to be updated as it will be only target specific after 2328 * retrieving it from the target; the nfds value is expected to be the 2329 * highest file descriptor that needs to be checked, so we need to extend 2330 * it out for nfds_h when we do the update. 2331 */ 2332 int nfds_h = 0; 2333 std::map<int, int> trans_map; 2334 auto try_add_host_set = [&](fd_set *tgt_set_entry, 2335 fd_set *hst_set_entry, 2336 int iter) -> bool 2337 { 2338 /** 2339 * By this point, we know that we are looking at a valid file 2340 * descriptor set on the target. We need to check if the target file 2341 * descriptor value passed in as iter is part of the set. 2342 */ 2343 if (FD_ISSET(iter, tgt_set_entry)) { 2344 /** 2345 * We know that the target file descriptor belongs to the set, 2346 * but we do not yet know if the file descriptor is valid or 2347 * that we have a host mapping. Check that now. 2348 */ 2349 auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[iter]); 2350 if (!hbfdp) 2351 return true; 2352 auto sim_fd = hbfdp->getSimFD(); 2353 2354 /** 2355 * Add the sim_fd to tgt_fd translation into trans_map for use 2356 * later when we need to zero the target fd_set structures and 2357 * then update them with hits returned from the host select call. 2358 */ 2359 trans_map[sim_fd] = iter; 2360 2361 /** 2362 * We know that the host file descriptor exists so now we check 2363 * if we need to update the max count for nfds_h before passing 2364 * the duplicated structure into the host. 2365 */ 2366 nfds_h = std::max(nfds_h - 1, sim_fd + 1); 2367 2368 /** 2369 * Add the host file descriptor to the set that we are going to 2370 * pass into the host. 2371 */ 2372 FD_SET(sim_fd, hst_set_entry); 2373 } 2374 return false; 2375 }; 2376 2377 for (int i = 0; i < nfds_t; i++) { 2378 if (fds_read_ptr) { 2379 bool ebadf = try_add_host_set((fd_set*)&*rd_t, &rd_h, i); 2380 if (ebadf) return -EBADF; 2381 } 2382 if (fds_writ_ptr) { 2383 bool ebadf = try_add_host_set((fd_set*)&*wr_t, &wr_h, i); 2384 if (ebadf) return -EBADF; 2385 } 2386 if (fds_excp_ptr) { 2387 bool ebadf = try_add_host_set((fd_set*)&*ex_t, &ex_h, i); 2388 if (ebadf) return -EBADF; 2389 } 2390 } 2391 2392 if (time_val_ptr) { 2393 /** 2394 * It might be possible to decrement the timeval based on some 2395 * derivation of wall clock determined from elapsed simulator ticks 2396 * but that seems like overkill. Rather, we just set the timeval with 2397 * zero timeout. (There is no reason to block during the simulation 2398 * as it only decreases simulator performance.) 2399 */ 2400 tp->tv_sec = 0; 2401 tp->tv_usec = 0; 2402 2403 retval = select(nfds_h, 2404 fds_read_ptr ? &rd_h : nullptr, 2405 fds_writ_ptr ? &wr_h : nullptr, 2406 fds_excp_ptr ? &ex_h : nullptr, 2407 (timeval*)&*tp); 2408 } else { 2409 /** 2410 * If the timeval pointer is null, setup a new timeval structure to 2411 * pass into the host select call. Unfortunately, we will need to 2412 * manually check the return value and throw a retry fault if the 2413 * return value is zero. Allowing the system call to block will 2414 * likely deadlock the event queue. 2415 */ 2416 struct timeval tv = { 0, 0 }; 2417 2418 retval = select(nfds_h, 2419 fds_read_ptr ? &rd_h : nullptr, 2420 fds_writ_ptr ? &wr_h : nullptr, 2421 fds_excp_ptr ? &ex_h : nullptr, 2422 &tv); 2423 2424 if (retval == 0) { 2425 /** 2426 * If blocking indefinitely, check the signal list to see if a 2427 * signal would break the poll out of the retry cycle and try to 2428 * return the signal interrupt instead. 2429 */ 2430 for (auto sig : tc->getSystemPtr()->signalList) 2431 if (sig.receiver == p) 2432 return -EINTR; 2433 return SyscallReturn::retry(); 2434 } 2435 } 2436 2437 if (retval == -1) 2438 return -errno; 2439 2440 FD_ZERO((fd_set*)&*rd_t); 2441 FD_ZERO((fd_set*)&*wr_t); 2442 FD_ZERO((fd_set*)&*ex_t); 2443 2444 /** 2445 * We need to translate the host file descriptor set into a target file 2446 * descriptor set. This involves both our internal process fd array 2447 * and the fd_set defined in header files. 2448 */ 2449 for (int i = 0; i < nfds_h; i++) { 2450 if (fds_read_ptr) { 2451 if (FD_ISSET(i, &rd_h)) 2452 FD_SET(trans_map[i], (fd_set*)&*rd_t); 2453 } 2454 2455 if (fds_writ_ptr) { 2456 if (FD_ISSET(i, &wr_h)) 2457 FD_SET(trans_map[i], (fd_set*)&*wr_t); 2458 } 2459 2460 if (fds_excp_ptr) { 2461 if (FD_ISSET(i, &ex_h)) 2462 FD_SET(trans_map[i], (fd_set*)&*ex_t); 2463 } 2464 } 2465 2466 if (fds_read_ptr) 2467 rd_t.copyOut(tc->getMemProxy()); 2468 if (fds_writ_ptr) 2469 wr_t.copyOut(tc->getMemProxy()); 2470 if (fds_excp_ptr) 2471 ex_t.copyOut(tc->getMemProxy()); 2472 if (time_val_ptr) 2473 tp.copyOut(tc->getMemProxy()); 2474 2475 return retval; 2476} 2477 2478template <class OS> 2479SyscallReturn 2480readFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 2481{ 2482 int index = 0; 2483 int tgt_fd = p->getSyscallArg(tc, index); 2484 Addr buf_ptr = p->getSyscallArg(tc, index); 2485 int nbytes = p->getSyscallArg(tc, index); 2486 2487 auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 2488 if (!hbfdp) 2489 return -EBADF; 2490 int sim_fd = hbfdp->getSimFD(); 2491 2492 struct pollfd pfd; 2493 pfd.fd = sim_fd; 2494 pfd.events = POLLIN | POLLPRI; 2495 if ((poll(&pfd, 1, 0) == 0) 2496 && !(hbfdp->getFlags() & OS::TGT_O_NONBLOCK)) 2497 return SyscallReturn::retry(); 2498 2499 BufferArg buf_arg(buf_ptr, nbytes); 2500 int bytes_read = read(sim_fd, buf_arg.bufferPtr(), nbytes); 2501 2502 if (bytes_read > 0) 2503 buf_arg.copyOut(tc->getMemProxy()); 2504 2505 return (bytes_read == -1) ? -errno : bytes_read; 2506} 2507 2508template <class OS> 2509SyscallReturn 2510writeFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 2511{ 2512 int index = 0; 2513 int tgt_fd = p->getSyscallArg(tc, index); 2514 Addr buf_ptr = p->getSyscallArg(tc, index); 2515 int nbytes = p->getSyscallArg(tc, index); 2516 2517 auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]); 2518 if (!hbfdp) 2519 return -EBADF; 2520 int sim_fd = hbfdp->getSimFD(); 2521 2522 BufferArg buf_arg(buf_ptr, nbytes); 2523 buf_arg.copyIn(tc->getMemProxy()); 2524 2525 struct pollfd pfd; 2526 pfd.fd = sim_fd; 2527 pfd.events = POLLOUT; 2528 2529 /** 2530 * We don't want to poll on /dev/random. The kernel will not enable the 2531 * file descriptor for writing unless the entropy in the system falls 2532 * below write_wakeup_threshold. This is not guaranteed to happen 2533 * depending on host settings. 2534 */ 2535 auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(hbfdp); 2536 if (ffdp && (ffdp->getFileName() != "/dev/random")) { 2537 if (!poll(&pfd, 1, 0) && !(ffdp->getFlags() & OS::TGT_O_NONBLOCK)) 2538 return SyscallReturn::retry(); 2539 } 2540 2541 int bytes_written = write(sim_fd, buf_arg.bufferPtr(), nbytes); 2542 2543 if (bytes_written != -1) 2544 fsync(sim_fd); 2545 2546 return (bytes_written == -1) ? -errno : bytes_written; 2547} 2548 2549template <class OS> 2550SyscallReturn 2551wait4Func(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 2552{ 2553 int index = 0; 2554 pid_t pid = p->getSyscallArg(tc, index); 2555 Addr statPtr = p->getSyscallArg(tc, index); 2556 int options = p->getSyscallArg(tc, index); 2557 Addr rusagePtr = p->getSyscallArg(tc, index); 2558 2559 if (rusagePtr) 2560 DPRINTFR(SyscallVerbose, 2561 "%d: %s: syscall wait4: rusage pointer provided however " 2562 "functionality not supported. Ignoring rusage pointer.\n", 2563 curTick(), tc->getCpuPtr()->name()); 2564 2565 /** 2566 * Currently, wait4 is only implemented so that it will wait for children 2567 * exit conditions which are denoted by a SIGCHLD signals posted into the 2568 * system signal list. We return no additional information via any of the 2569 * parameters supplied to wait4. If nothing is found in the system signal 2570 * list, we will wait indefinitely for SIGCHLD to post by retrying the 2571 * call. 2572 */ 2573 System *sysh = tc->getSystemPtr(); 2574 std::list<BasicSignal>::iterator iter; 2575 for (iter=sysh->signalList.begin(); iter!=sysh->signalList.end(); iter++) { 2576 if (iter->receiver == p) { 2577 if (pid < -1) { 2578 if ((iter->sender->pgid() == -pid) 2579 && (iter->signalValue == OS::TGT_SIGCHLD)) 2580 goto success; 2581 } else if (pid == -1) { 2582 if (iter->signalValue == OS::TGT_SIGCHLD) 2583 goto success; 2584 } else if (pid == 0) { 2585 if ((iter->sender->pgid() == p->pgid()) 2586 && (iter->signalValue == OS::TGT_SIGCHLD)) 2587 goto success; 2588 } else { 2589 if ((iter->sender->pid() == pid) 2590 && (iter->signalValue == OS::TGT_SIGCHLD)) 2591 goto success; 2592 } 2593 } 2594 } 2595 2596 return (options & OS::TGT_WNOHANG) ? 0 : SyscallReturn::retry(); 2597 2598success: 2599 // Set status to EXITED for WIFEXITED evaluations. 2600 const int EXITED = 0; 2601 BufferArg statusBuf(statPtr, sizeof(int)); 2602 *(int *)statusBuf.bufferPtr() = EXITED; 2603 statusBuf.copyOut(tc->getMemProxy()); 2604 2605 // Return the child PID. 2606 pid_t retval = iter->sender->pid(); 2607 sysh->signalList.erase(iter); 2608 return retval; 2609} 2610 2611template <class OS> 2612SyscallReturn 2613acceptFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc) 2614{ 2615 struct sockaddr sa; 2616 socklen_t addrLen; 2617 int host_fd; 2618 int index = 0; 2619 int tgt_fd = p->getSyscallArg(tc, index); 2620 Addr addrPtr = p->getSyscallArg(tc, index); 2621 Addr lenPtr = p->getSyscallArg(tc, index); 2622 2623 BufferArg *lenBufPtr = nullptr; 2624 BufferArg *addrBufPtr = nullptr; 2625 2626 auto sfdp = std::dynamic_pointer_cast<SocketFDEntry>((*p->fds)[tgt_fd]); 2627 if (!sfdp) 2628 return -EBADF; 2629 int sim_fd = sfdp->getSimFD(); 2630 2631 /** 2632 * We poll the socket file descriptor first to guarantee that we do not 2633 * block on our accept call. The socket can be opened without the 2634 * non-blocking flag (it blocks). This will cause deadlocks between 2635 * communicating processes. 2636 */ 2637 struct pollfd pfd; 2638 pfd.fd = sim_fd; 2639 pfd.events = POLLIN | POLLPRI; 2640 if ((poll(&pfd, 1, 0) == 0) 2641 && !(sfdp->getFlags() & OS::TGT_O_NONBLOCK)) 2642 return SyscallReturn::retry(); 2643 2644 if (lenPtr) { 2645 lenBufPtr = new BufferArg(lenPtr, sizeof(socklen_t)); 2646 lenBufPtr->copyIn(tc->getMemProxy()); 2647 memcpy(&addrLen, (socklen_t *)lenBufPtr->bufferPtr(), 2648 sizeof(socklen_t)); 2649 } 2650 2651 if (addrPtr) { 2652 addrBufPtr = new BufferArg(addrPtr, sizeof(struct sockaddr)); 2653 addrBufPtr->copyIn(tc->getMemProxy()); 2654 memcpy(&sa, (struct sockaddr *)addrBufPtr->bufferPtr(), 2655 sizeof(struct sockaddr)); 2656 } 2657 2658 host_fd = accept(sim_fd, &sa, &addrLen); 2659 2660 if (host_fd == -1) 2661 return -errno; 2662 2663 if (addrPtr) { 2664 memcpy(addrBufPtr->bufferPtr(), &sa, sizeof(sa)); 2665 addrBufPtr->copyOut(tc->getMemProxy()); 2666 delete(addrBufPtr); 2667 } 2668 2669 if (lenPtr) { 2670 *(socklen_t *)lenBufPtr->bufferPtr() = addrLen; 2671 lenBufPtr->copyOut(tc->getMemProxy()); 2672 delete(lenBufPtr); 2673 } 2674 2675 auto afdp = std::make_shared<SocketFDEntry>(host_fd, sfdp->_domain, 2676 sfdp->_type, sfdp->_protocol); 2677 return p->fds->allocFD(afdp); 2678} 2679 2680#endif // __SIM_SYSCALL_EMUL_HH__ 2681