1/* 2 * Copyright (c) 2003-2005 The Regents of The University of Michigan 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; --- 48 unchanged lines hidden (view full) --- 57#include "base/misc.hh" 58#include "base/trace.hh" 59#include "base/types.hh" 60#include "config/the_isa.hh" 61#include "cpu/base.hh" 62#include "cpu/thread_context.hh" 63#include "debug/SyscallVerbose.hh" 64#include "mem/page_table.hh" |
65#include "mem/translating_port.hh" |
66#include "sim/byteswap.hh" 67#include "sim/process.hh" |
68#include "sim/syscallreturn.hh" |
69#include "sim/system.hh" 70 71/// 72/// System call descriptor. 73/// 74class SyscallDesc { 75 76 public: --- 39 unchanged lines hidden (view full) --- 116 memset(bufPtr, 0, size); 117 } 118 119 virtual ~BaseBufferArg() { delete [] bufPtr; } 120 121 // 122 // copy data into simulator space (read from target memory) 123 // |
124 virtual bool copyIn(TranslatingPort *memport) |
125 { |
126 memport->readBlob(addr, bufPtr, size); |
127 return true; // no EFAULT detection for now 128 } 129 130 // 131 // copy data out of simulator space (write to target memory) 132 // |
133 virtual bool copyOut(TranslatingPort *memport) |
134 { |
135 memport->writeBlob(addr, bufPtr, size); |
136 return true; // no EFAULT detection for now 137 } 138 139 protected: 140 Addr addr; 141 int size; 142 uint8_t *bufPtr; 143}; --- 252 unchanged lines hidden (view full) --- 396convertStatBuf(target_stat &tgt, host_stat *host, bool fakeTTY = false) 397{ 398 using namespace TheISA; 399 400 if (fakeTTY) 401 tgt->st_dev = 0xA; 402 else 403 tgt->st_dev = host->st_dev; |
404 tgt->st_dev = htog(tgt->st_dev); |
405 tgt->st_ino = host->st_ino; |
406 tgt->st_ino = htog(tgt->st_ino); |
407 tgt->st_mode = host->st_mode; 408 if (fakeTTY) { 409 // Claim to be a character device 410 tgt->st_mode &= ~S_IFMT; // Clear S_IFMT 411 tgt->st_mode |= S_IFCHR; // Set S_IFCHR 412 } |
413 tgt->st_mode = htog(tgt->st_mode); |
414 tgt->st_nlink = host->st_nlink; |
415 tgt->st_nlink = htog(tgt->st_nlink); |
416 tgt->st_uid = host->st_uid; |
417 tgt->st_uid = htog(tgt->st_uid); |
418 tgt->st_gid = host->st_gid; |
419 tgt->st_gid = htog(tgt->st_gid); |
420 if (fakeTTY) 421 tgt->st_rdev = 0x880d; 422 else 423 tgt->st_rdev = host->st_rdev; |
424 tgt->st_rdev = htog(tgt->st_rdev); |
425 tgt->st_size = host->st_size; |
426 tgt->st_size = htog(tgt->st_size); |
427 tgt->st_atimeX = host->st_atime; |
428 tgt->st_atimeX = htog(tgt->st_atimeX); |
429 tgt->st_mtimeX = host->st_mtime; |
430 tgt->st_mtimeX = htog(tgt->st_mtimeX); |
431 tgt->st_ctimeX = host->st_ctime; |
432 tgt->st_ctimeX = htog(tgt->st_ctimeX); |
433 // Force the block size to be 8k. This helps to ensure buffered io works 434 // consistently across different hosts. 435 tgt->st_blksize = 0x2000; |
436 tgt->st_blksize = htog(tgt->st_blksize); |
437 tgt->st_blocks = host->st_blocks; |
438 tgt->st_blocks = htog(tgt->st_blocks); |
439} 440 441// Same for stat64 442 443template <typename target_stat, typename host_stat64> 444static void 445convertStat64Buf(target_stat &tgt, host_stat64 *host, bool fakeTTY = false) 446{ 447 using namespace TheISA; 448 449 convertStatBuf<target_stat, host_stat64>(tgt, host, fakeTTY); 450#if defined(STAT_HAVE_NSEC) 451 tgt->st_atime_nsec = host->st_atime_nsec; |
452 tgt->st_atime_nsec = htog(tgt->st_atime_nsec); |
453 tgt->st_mtime_nsec = host->st_mtime_nsec; |
454 tgt->st_mtime_nsec = htog(tgt->st_mtime_nsec); |
455 tgt->st_ctime_nsec = host->st_ctime_nsec; |
456 tgt->st_ctime_nsec = htog(tgt->st_ctime_nsec); |
457#else 458 tgt->st_atime_nsec = 0; 459 tgt->st_mtime_nsec = 0; 460 tgt->st_ctime_nsec = 0; 461#endif 462} 463 464//Here are a couple convenience functions 465template<class OS> 466static void |
467copyOutStatBuf(TranslatingPort * mem, Addr addr, |
468 hst_stat *host, bool fakeTTY = false) 469{ 470 typedef TypedBufferArg<typename OS::tgt_stat> tgt_stat_buf; 471 tgt_stat_buf tgt(addr); 472 convertStatBuf<tgt_stat_buf, hst_stat>(tgt, host, fakeTTY); 473 tgt.copyOut(mem); 474} 475 476template<class OS> 477static void |
478copyOutStat64Buf(TranslatingPort * mem, Addr addr, |
479 hst_stat64 *host, bool fakeTTY = false) 480{ 481 typedef TypedBufferArg<typename OS::tgt_stat64> tgt_stat_buf; 482 tgt_stat_buf tgt(addr); 483 convertStat64Buf<tgt_stat_buf, hst_stat64>(tgt, host, fakeTTY); 484 tgt.copyOut(mem); 485} 486 --- 38 unchanged lines hidden (view full) --- 525template <class OS> 526SyscallReturn 527openFunc(SyscallDesc *desc, int callnum, LiveProcess *process, 528 ThreadContext *tc) 529{ 530 std::string path; 531 532 int index = 0; |
533 if (!tc->getMemPort()->tryReadString(path, |
534 process->getSyscallArg(tc, index))) 535 return -EFAULT; 536 537 if (path == "/dev/sysdev0") { 538 // This is a memory-mapped high-resolution timer device on Alpha. 539 // We don't support it, so just punt. 540 warn("Ignoring open(%s, ...)\n", path); 541 return -ENOENT; --- 47 unchanged lines hidden (view full) --- 589 590 int index = 0; 591 TypedBufferArg<typename OS::tgt_sysinfo> 592 sysinfo(process->getSyscallArg(tc, index)); 593 594 sysinfo->uptime=seconds_since_epoch; 595 sysinfo->totalram=process->system->memSize(); 596 |
597 sysinfo.copyOut(tc->getMemPort()); |
598 599 return 0; 600} 601 602/// Target chmod() handler. 603template <class OS> 604SyscallReturn 605chmodFunc(SyscallDesc *desc, int callnum, LiveProcess *process, 606 ThreadContext *tc) 607{ 608 std::string path; 609 610 int index = 0; |
611 if (!tc->getMemPort()->tryReadString(path, |
612 process->getSyscallArg(tc, index))) { 613 return -EFAULT; 614 } 615 616 uint32_t mode = process->getSyscallArg(tc, index); 617 mode_t hostMode = 0; 618 619 // XXX translate mode flags via OS::something??? --- 53 unchanged lines hidden (view full) --- 673 (new_length % TheISA::VMPageSize != 0)) { 674 warn("mremap failing: arguments not page aligned"); 675 return -EINVAL; 676 } 677 678 if (new_length > old_length) { 679 if ((start + old_length) == process->mmap_end) { 680 uint64_t diff = new_length - old_length; |
681 process->pTable->allocate(process->mmap_end, diff); |
682 process->mmap_end += diff; 683 return start; 684 } else { 685 // sys/mman.h defined MREMAP_MAYMOVE 686 if (!(flags & 1)) { 687 warn("can't remap here and MREMAP_MAYMOVE flag not set\n"); 688 return -ENOMEM; 689 } else { 690 process->pTable->remap(start, old_length, process->mmap_end); 691 warn("mremapping to totally new vaddr %08p-%08p, adding %d\n", 692 process->mmap_end, process->mmap_end + new_length, new_length); 693 start = process->mmap_end; 694 // add on the remaining unallocated pages |
695 process->pTable->allocate(start + old_length, new_length - old_length); |
696 process->mmap_end += new_length; 697 warn("returning %08p as start\n", start); 698 return start; 699 } 700 } 701 } else { |
702 process->pTable->deallocate(start + new_length, old_length - 703 new_length); |
704 return start; 705 } 706} 707 708/// Target stat() handler. 709template <class OS> 710SyscallReturn 711statFunc(SyscallDesc *desc, int callnum, LiveProcess *process, 712 ThreadContext *tc) 713{ 714 std::string path; 715 716 int index = 0; |
717 if (!tc->getMemPort()->tryReadString(path, |
718 process->getSyscallArg(tc, index))) { 719 return -EFAULT; 720 } 721 Addr bufPtr = process->getSyscallArg(tc, index); 722 723 // Adjust path for current working directory 724 path = process->fullPath(path); 725 726 struct stat hostBuf; 727 int result = stat(path.c_str(), &hostBuf); 728 729 if (result < 0) 730 return -errno; 731 |
732 copyOutStatBuf<OS>(tc->getMemPort(), bufPtr, &hostBuf); |
733 734 return 0; 735} 736 737 738/// Target stat64() handler. 739template <class OS> 740SyscallReturn 741stat64Func(SyscallDesc *desc, int callnum, LiveProcess *process, 742 ThreadContext *tc) 743{ 744 std::string path; 745 746 int index = 0; |
747 if (!tc->getMemPort()->tryReadString(path, |
748 process->getSyscallArg(tc, index))) 749 return -EFAULT; 750 Addr bufPtr = process->getSyscallArg(tc, index); 751 752 // Adjust path for current working directory 753 path = process->fullPath(path); 754 755#if NO_STAT64 756 struct stat hostBuf; 757 int result = stat(path.c_str(), &hostBuf); 758#else 759 struct stat64 hostBuf; 760 int result = stat64(path.c_str(), &hostBuf); 761#endif 762 763 if (result < 0) 764 return -errno; 765 |
766 copyOutStat64Buf<OS>(tc->getMemPort(), bufPtr, &hostBuf); |
767 768 return 0; 769} 770 771 772/// Target fstat64() handler. 773template <class OS> 774SyscallReturn --- 14 unchanged lines hidden (view full) --- 789#else 790 struct stat64 hostBuf; 791 int result = fstat64(process->sim_fd(fd), &hostBuf); 792#endif 793 794 if (result < 0) 795 return -errno; 796 |
797 copyOutStat64Buf<OS>(tc->getMemPort(), bufPtr, &hostBuf, (fd == 1)); |
798 799 return 0; 800} 801 802 803/// Target lstat() handler. 804template <class OS> 805SyscallReturn 806lstatFunc(SyscallDesc *desc, int callnum, LiveProcess *process, 807 ThreadContext *tc) 808{ 809 std::string path; 810 811 int index = 0; |
812 if (!tc->getMemPort()->tryReadString(path, |
813 process->getSyscallArg(tc, index))) { 814 return -EFAULT; 815 } 816 Addr bufPtr = process->getSyscallArg(tc, index); 817 818 // Adjust path for current working directory 819 path = process->fullPath(path); 820 821 struct stat hostBuf; 822 int result = lstat(path.c_str(), &hostBuf); 823 824 if (result < 0) 825 return -errno; 826 |
827 copyOutStatBuf<OS>(tc->getMemPort(), bufPtr, &hostBuf); |
828 829 return 0; 830} 831 832/// Target lstat64() handler. 833template <class OS> 834SyscallReturn 835lstat64Func(SyscallDesc *desc, int callnum, LiveProcess *process, 836 ThreadContext *tc) 837{ 838 std::string path; 839 840 int index = 0; |
841 if (!tc->getMemPort()->tryReadString(path, |
842 process->getSyscallArg(tc, index))) { 843 return -EFAULT; 844 } 845 Addr bufPtr = process->getSyscallArg(tc, index); 846 847 // Adjust path for current working directory 848 path = process->fullPath(path); 849 850#if NO_STAT64 851 struct stat hostBuf; 852 int result = lstat(path.c_str(), &hostBuf); 853#else 854 struct stat64 hostBuf; 855 int result = lstat64(path.c_str(), &hostBuf); 856#endif 857 858 if (result < 0) 859 return -errno; 860 |
861 copyOutStat64Buf<OS>(tc->getMemPort(), bufPtr, &hostBuf); |
862 863 return 0; 864} 865 866/// Target fstat() handler. 867template <class OS> 868SyscallReturn 869fstatFunc(SyscallDesc *desc, int callnum, LiveProcess *process, --- 9 unchanged lines hidden (view full) --- 879 return -EBADF; 880 881 struct stat hostBuf; 882 int result = fstat(fd, &hostBuf); 883 884 if (result < 0) 885 return -errno; 886 |
887 copyOutStatBuf<OS>(tc->getMemPort(), bufPtr, &hostBuf, (fd == 1)); |
888 889 return 0; 890} 891 892 893/// Target statfs() handler. 894template <class OS> 895SyscallReturn 896statfsFunc(SyscallDesc *desc, int callnum, LiveProcess *process, 897 ThreadContext *tc) 898{ 899 std::string path; 900 901 int index = 0; |
902 if (!tc->getMemPort()->tryReadString(path, |
903 process->getSyscallArg(tc, index))) { 904 return -EFAULT; 905 } 906 Addr bufPtr = process->getSyscallArg(tc, index); 907 908 // Adjust path for current working directory 909 path = process->fullPath(path); 910 911 struct statfs hostBuf; 912 int result = statfs(path.c_str(), &hostBuf); 913 914 if (result < 0) 915 return -errno; 916 |
917 OS::copyOutStatfsBuf(tc->getMemPort(), bufPtr, &hostBuf); |
918 919 return 0; 920} 921 922 923/// Target fstatfs() handler. 924template <class OS> 925SyscallReturn --- 8 unchanged lines hidden (view full) --- 934 return -EBADF; 935 936 struct statfs hostBuf; 937 int result = fstatfs(fd, &hostBuf); 938 939 if (result < 0) 940 return -errno; 941 |
942 OS::copyOutStatfsBuf(tc->getMemPort(), bufPtr, &hostBuf); |
943 944 return 0; 945} 946 947 948/// Target writev() handler. 949template <class OS> 950SyscallReturn 951writevFunc(SyscallDesc *desc, int callnum, LiveProcess *process, 952 ThreadContext *tc) 953{ 954 int index = 0; 955 int fd = process->getSyscallArg(tc, index); 956 if (fd < 0 || process->sim_fd(fd) < 0) { 957 // doesn't map to any simulator fd: not a valid target fd 958 return -EBADF; 959 } 960 |
961 TranslatingPort *p = tc->getMemPort(); |
962 uint64_t tiov_base = process->getSyscallArg(tc, index); 963 size_t count = process->getSyscallArg(tc, index); 964 struct iovec hiov[count]; 965 for (size_t i = 0; i < count; ++i) { 966 typename OS::tgt_iovec tiov; 967 968 p->readBlob(tiov_base + i*sizeof(typename OS::tgt_iovec), 969 (uint8_t*)&tiov, sizeof(typename OS::tgt_iovec)); |
970 hiov[i].iov_len = gtoh(tiov.iov_len); |
971 hiov[i].iov_base = new char [hiov[i].iov_len]; |
972 p->readBlob(gtoh(tiov.iov_base), (uint8_t *)hiov[i].iov_base, |
973 hiov[i].iov_len); 974 } 975 976 int result = writev(process->sim_fd(fd), hiov, count); 977 978 for (size_t i = 0; i < count; ++i) 979 delete [] (char *)hiov[i].iov_base; 980 --- 42 unchanged lines hidden (view full) --- 1023 if ((start % TheISA::VMPageSize) != 0 || 1024 (length % TheISA::VMPageSize) != 0) { 1025 warn("mmap failing: arguments not page-aligned: " 1026 "start 0x%x length 0x%x", 1027 start, length); 1028 return -EINVAL; 1029 } 1030 |
1031 if (start != 0) { 1032 warn("mmap: ignoring suggested map address 0x%x, using 0x%x", 1033 start, p->mmap_end); |
1034 } 1035 |
1036 // pick next address from our "mmap region" 1037 if (OS::mmapGrowsDown()) { 1038 start = p->mmap_end - length; 1039 p->mmap_end = start; 1040 } else { 1041 start = p->mmap_end; 1042 p->mmap_end += length; |
1043 } |
1044 p->pTable->allocate(start, length); |
1045 |
1046 return start; 1047} 1048 1049/// Target getrlimit() handler. 1050template <class OS> 1051SyscallReturn 1052getrlimitFunc(SyscallDesc *desc, int callnum, LiveProcess *process, 1053 ThreadContext *tc) 1054{ 1055 int index = 0; 1056 unsigned resource = process->getSyscallArg(tc, index); 1057 TypedBufferArg<typename OS::rlimit> rlp(process->getSyscallArg(tc, index)); 1058 1059 switch (resource) { 1060 case OS::TGT_RLIMIT_STACK: 1061 // max stack size in bytes: make up a number (8MB for now) 1062 rlp->rlim_cur = rlp->rlim_max = 8 * 1024 * 1024; |
1063 rlp->rlim_cur = htog(rlp->rlim_cur); 1064 rlp->rlim_max = htog(rlp->rlim_max); |
1065 break; 1066 1067 case OS::TGT_RLIMIT_DATA: 1068 // max data segment size in bytes: make up a number 1069 rlp->rlim_cur = rlp->rlim_max = 256 * 1024 * 1024; |
1070 rlp->rlim_cur = htog(rlp->rlim_cur); 1071 rlp->rlim_max = htog(rlp->rlim_max); |
1072 break; 1073 1074 default: 1075 std::cerr << "getrlimitFunc: unimplemented resource " << resource 1076 << std::endl; 1077 abort(); 1078 break; 1079 } 1080 |
1081 rlp.copyOut(tc->getMemPort()); |
1082 return 0; 1083} 1084 1085/// Target gettimeofday() handler. 1086template <class OS> 1087SyscallReturn 1088gettimeofdayFunc(SyscallDesc *desc, int callnum, LiveProcess *process, 1089 ThreadContext *tc) 1090{ 1091 int index = 0; 1092 TypedBufferArg<typename OS::timeval> tp(process->getSyscallArg(tc, index)); 1093 1094 getElapsedTime(tp->tv_sec, tp->tv_usec); 1095 tp->tv_sec += seconds_since_epoch; 1096 tp->tv_sec = TheISA::htog(tp->tv_sec); 1097 tp->tv_usec = TheISA::htog(tp->tv_usec); 1098 |
1099 tp.copyOut(tc->getMemPort()); |
1100 1101 return 0; 1102} 1103 1104 1105/// Target utimes() handler. 1106template <class OS> 1107SyscallReturn 1108utimesFunc(SyscallDesc *desc, int callnum, LiveProcess *process, 1109 ThreadContext *tc) 1110{ 1111 std::string path; 1112 1113 int index = 0; |
1114 if (!tc->getMemPort()->tryReadString(path, |
1115 process->getSyscallArg(tc, index))) { 1116 return -EFAULT; 1117 } 1118 1119 TypedBufferArg<typename OS::timeval [2]> 1120 tp(process->getSyscallArg(tc, index)); |
1121 tp.copyIn(tc->getMemPort()); |
1122 1123 struct timeval hostTimeval[2]; 1124 for (int i = 0; i < 2; ++i) 1125 { |
1126 hostTimeval[i].tv_sec = gtoh((*tp)[i].tv_sec); 1127 hostTimeval[i].tv_usec = gtoh((*tp)[i].tv_usec); |
1128 } 1129 1130 // Adjust path for current working directory 1131 path = process->fullPath(path); 1132 1133 int result = utimes(path.c_str(), hostTimeval); 1134 1135 if (result < 0) --- 28 unchanged lines hidden (view full) --- 1164 rup->ru_msgrcv = 0; 1165 rup->ru_nsignals = 0; 1166 rup->ru_nvcsw = 0; 1167 rup->ru_nivcsw = 0; 1168 1169 switch (who) { 1170 case OS::TGT_RUSAGE_SELF: 1171 getElapsedTime(rup->ru_utime.tv_sec, rup->ru_utime.tv_usec); |
1172 rup->ru_utime.tv_sec = htog(rup->ru_utime.tv_sec); 1173 rup->ru_utime.tv_usec = htog(rup->ru_utime.tv_usec); |
1174 break; 1175 1176 case OS::TGT_RUSAGE_CHILDREN: 1177 // do nothing. We have no child processes, so they take no time. 1178 break; 1179 1180 default: 1181 // don't really handle THREAD or CHILDREN, but just warn and 1182 // plow ahead 1183 warn("getrusage() only supports RUSAGE_SELF. Parameter %d ignored.", 1184 who); 1185 } 1186 |
1187 rup.copyOut(tc->getMemPort()); |
1188 1189 return 0; 1190} 1191 1192/// Target times() function. 1193template <class OS> 1194SyscallReturn 1195timesFunc(SyscallDesc *desc, int callnum, LiveProcess *process, --- 5 unchanged lines hidden (view full) --- 1201 // Fill in the time structure (in clocks) 1202 int64_t clocks = curTick() * OS::M5_SC_CLK_TCK / SimClock::Int::s; 1203 bufp->tms_utime = clocks; 1204 bufp->tms_stime = 0; 1205 bufp->tms_cutime = 0; 1206 bufp->tms_cstime = 0; 1207 1208 // Convert to host endianness |
1209 bufp->tms_utime = htog(bufp->tms_utime); |
1210 1211 // Write back |
1212 bufp.copyOut(tc->getMemPort()); |
1213 1214 // Return clock ticks since system boot 1215 return clocks; 1216} 1217 1218/// Target time() function. 1219template <class OS> 1220SyscallReturn 1221timeFunc(SyscallDesc *desc, int callnum, LiveProcess *process, 1222 ThreadContext *tc) 1223{ 1224 typename OS::time_t sec, usec; 1225 getElapsedTime(sec, usec); 1226 sec += seconds_since_epoch; 1227 1228 int index = 0; 1229 Addr taddr = (Addr)process->getSyscallArg(tc, index); 1230 if(taddr != 0) { 1231 typename OS::time_t t = sec; |
1232 t = htog(t); 1233 TranslatingPort *p = tc->getMemPort(); |
1234 p->writeBlob(taddr, (uint8_t*)&t, (int)sizeof(typename OS::time_t)); 1235 } 1236 return sec; 1237} 1238 1239 1240#endif // __SIM_SYSCALL_EMUL_HH__ |