| |
| /*--------------------------------------------------------------------*/ |
| /*--- Linux-specific syscalls, etc. syscalls-linux.c ---*/ |
| /*--------------------------------------------------------------------*/ |
| |
| /* |
| This file is part of Valgrind, a dynamic binary instrumentation |
| framework. |
| |
| Copyright (C) 2000-2005 Nicholas Nethercote |
| njn@valgrind.org |
| |
| This program is free software; you can redistribute it and/or |
| modify it under the terms of the GNU General Public License as |
| published by the Free Software Foundation; either version 2 of the |
| License, or (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307, USA. |
| |
| The GNU General Public License is contained in the file COPYING. |
| */ |
| |
| #include "core.h" |
| #include "pub_core_aspacemgr.h" |
| #include "pub_core_libcassert.h" |
| #include "pub_core_libcfile.h" |
| #include "pub_core_libcprint.h" |
| #include "pub_core_tooliface.h" |
| #include "priv_syscalls.h" |
| |
| /* --------------------------------------------------------------------- |
| PRE/POST wrappers for arch-generic, Linux-specific syscalls |
| ------------------------------------------------------------------ */ |
| |
| // Nb: See the comment above the generic PRE/POST wrappers in |
| // coregrind/vg_syscalls.c for notes about how they work. |
| |
| #define PRE(name, f) PRE_TEMPLATE( , vgOS_linux, name, f) |
| #define POST(name) POST_TEMPLATE( , vgOS_linux, name) |
| |
| PRE(sys_exit_group, Special) |
| { |
| ThreadId t; |
| |
| PRINT("exit_group( %d )", ARG1); |
| PRE_REG_READ1(void, "exit_group", int, exit_code); |
| |
| /* A little complex; find all the threads with the same threadgroup |
| as this one (including this one), and mark them to exit */ |
| for (t = 1; t < VG_N_THREADS; t++) { |
| if (VG_(threads)[t].status == VgTs_Empty || /* not alive */ |
| VG_(threads)[t].os_state.threadgroup != tst->os_state.threadgroup) /* not our group */ |
| continue; |
| |
| VG_(threads)[t].exitreason = VgSrc_ExitSyscall; |
| VG_(threads)[t].os_state.exitcode = ARG1; |
| |
| if (t != tid) |
| VG_(kill_thread)(t); /* unblock it, if blocked */ |
| } |
| |
| /* exit_group doesn't return anything (perhaps it doesn't return?) |
| Nevertheless, if we don't do this, the result-not-assigned- |
| yet-you-said-you-were-Special assertion in the main syscall |
| handling logic will fire. Hence .. |
| */ |
| SET_RESULT(0); |
| } |
| |
| PRE(sys_mount, MayBlock) |
| { |
| // Nb: depending on 'flags', the 'type' and 'data' args may be ignored. |
| // We are conservative and check everything, except the memory pointed to |
| // by 'data'. |
| PRINT( "sys_mount( %p, %p, %p, %p, %p )" ,ARG1,ARG2,ARG3,ARG4,ARG5); |
| PRE_REG_READ5(long, "mount", |
| char *, source, char *, target, char *, type, |
| unsigned long, flags, void *, data); |
| PRE_MEM_RASCIIZ( "mount(source)", ARG1); |
| PRE_MEM_RASCIIZ( "mount(target)", ARG2); |
| PRE_MEM_RASCIIZ( "mount(type)", ARG3); |
| } |
| |
| PRE(sys_oldumount, 0) |
| { |
| PRINT("sys_oldumount( %p )", ARG1); |
| PRE_REG_READ1(long, "umount", char *, path); |
| PRE_MEM_RASCIIZ( "umount(path)", ARG1); |
| } |
| |
| PRE(sys_umount, 0) |
| { |
| PRINT("sys_umount( %p )", ARG1); |
| PRE_REG_READ2(long, "umount2", char *, path, int, flags); |
| PRE_MEM_RASCIIZ( "umount2(path)", ARG1); |
| } |
| |
| PRE(sys_llseek, 0) |
| { |
| PRINT("sys_llseek ( %d, 0x%x, 0x%x, %p, %d )", ARG1,ARG2,ARG3,ARG4,ARG5); |
| PRE_REG_READ5(long, "llseek", |
| unsigned int, fd, unsigned long, offset_high, |
| unsigned long, offset_low, vki_loff_t *, result, |
| unsigned int, whence); |
| PRE_MEM_WRITE( "llseek(result)", ARG4, sizeof(vki_loff_t)); |
| } |
| |
| POST(sys_llseek) |
| { |
| if (RES == 0) |
| POST_MEM_WRITE( ARG4, sizeof(vki_loff_t) ); |
| } |
| |
| PRE(sys_adjtimex, 0) |
| { |
| struct vki_timex *tx = (struct vki_timex *)ARG1; |
| PRINT("sys_adjtimex ( %p )", ARG1); |
| PRE_REG_READ1(long, "adjtimex", struct timex *, buf); |
| PRE_MEM_READ( "adjtimex(timex->modes)", ARG1, sizeof(tx->modes)); |
| |
| #define ADJX(bit,field) \ |
| if (tx->modes & bit) \ |
| PRE_MEM_READ( "adjtimex(timex->"#field")", \ |
| (Addr)&tx->field, sizeof(tx->field)) |
| ADJX(ADJ_FREQUENCY, freq); |
| ADJX(ADJ_MAXERROR, maxerror); |
| ADJX(ADJ_ESTERROR, esterror); |
| ADJX(ADJ_STATUS, status); |
| ADJX(ADJ_TIMECONST, constant); |
| ADJX(ADJ_TICK, tick); |
| #undef ADJX |
| |
| PRE_MEM_WRITE( "adjtimex(timex)", ARG1, sizeof(struct vki_timex)); |
| } |
| |
| POST(sys_adjtimex) |
| { |
| POST_MEM_WRITE( ARG1, sizeof(struct vki_timex) ); |
| } |
| |
| PRE(sys_setfsuid16, 0) |
| { |
| PRINT("sys_setfsuid16 ( %d )", ARG1); |
| PRE_REG_READ1(long, "setfsuid16", vki_old_uid_t, uid); |
| } |
| |
| PRE(sys_setfsuid, 0) |
| { |
| PRINT("sys_setfsuid ( %d )", ARG1); |
| PRE_REG_READ1(long, "setfsuid", vki_uid_t, uid); |
| } |
| |
| PRE(sys_setfsgid16, 0) |
| { |
| PRINT("sys_setfsgid16 ( %d )", ARG1); |
| PRE_REG_READ1(long, "setfsgid16", vki_old_gid_t, gid); |
| } |
| |
| PRE(sys_setfsgid, 0) |
| { |
| PRINT("sys_setfsgid ( %d )", ARG1); |
| PRE_REG_READ1(long, "setfsgid", vki_gid_t, gid); |
| } |
| |
| PRE(sys_setresuid16, 0) |
| { |
| PRINT("sys_setresuid16 ( %d, %d, %d )", ARG1, ARG2, ARG3); |
| PRE_REG_READ3(long, "setresuid16", |
| vki_old_uid_t, ruid, vki_old_uid_t, euid, vki_old_uid_t, suid); |
| } |
| |
| PRE(sys_setresuid, 0) |
| { |
| PRINT("sys_setresuid ( %d, %d, %d )", ARG1, ARG2, ARG3); |
| PRE_REG_READ3(long, "setresuid", |
| vki_uid_t, ruid, vki_uid_t, euid, vki_uid_t, suid); |
| } |
| |
| PRE(sys_getresuid16, 0) |
| { |
| PRINT("sys_getresuid16 ( %p, %p, %p )", ARG1,ARG2,ARG3); |
| PRE_REG_READ3(long, "getresuid16", |
| vki_old_uid_t *, ruid, vki_old_uid_t *, euid, |
| vki_old_uid_t *, suid); |
| PRE_MEM_WRITE( "getresuid16(ruid)", ARG1, sizeof(vki_old_uid_t) ); |
| PRE_MEM_WRITE( "getresuid16(euid)", ARG2, sizeof(vki_old_uid_t) ); |
| PRE_MEM_WRITE( "getresuid16(suid)", ARG3, sizeof(vki_old_uid_t) ); |
| } |
| |
| POST(sys_getresuid16) |
| { |
| if (RES == 0) { |
| POST_MEM_WRITE( ARG1, sizeof(vki_old_uid_t) ); |
| POST_MEM_WRITE( ARG2, sizeof(vki_old_uid_t) ); |
| POST_MEM_WRITE( ARG3, sizeof(vki_old_uid_t) ); |
| } |
| } |
| |
| PRE(sys_getresuid, 0) |
| { |
| PRINT("sys_getresuid ( %p, %p, %p )", ARG1,ARG2,ARG3); |
| PRE_REG_READ3(long, "getresuid", |
| vki_uid_t *, ruid, vki_uid_t *, euid, vki_uid_t *, suid); |
| PRE_MEM_WRITE( "getresuid(ruid)", ARG1, sizeof(vki_uid_t) ); |
| PRE_MEM_WRITE( "getresuid(euid)", ARG2, sizeof(vki_uid_t) ); |
| PRE_MEM_WRITE( "getresuid(suid)", ARG3, sizeof(vki_uid_t) ); |
| } |
| |
| POST(sys_getresuid) |
| { |
| if (RES == 0) { |
| POST_MEM_WRITE( ARG1, sizeof(vki_uid_t) ); |
| POST_MEM_WRITE( ARG2, sizeof(vki_uid_t) ); |
| POST_MEM_WRITE( ARG3, sizeof(vki_uid_t) ); |
| } |
| } |
| |
| PRE(sys_setresgid16, 0) |
| { |
| PRINT("sys_setresgid16 ( %d, %d, %d )", ARG1, ARG2, ARG3); |
| PRE_REG_READ3(long, "setresgid16", |
| vki_old_gid_t, rgid, vki_old_gid_t, egid, vki_old_gid_t, sgid); |
| } |
| |
| PRE(sys_setresgid, 0) |
| { |
| PRINT("sys_setresgid ( %d, %d, %d )", ARG1, ARG2, ARG3); |
| PRE_REG_READ3(long, "setresgid", |
| vki_gid_t, rgid, vki_gid_t, egid, vki_gid_t, sgid); |
| } |
| |
| PRE(sys_getresgid16, 0) |
| { |
| PRINT("sys_getresgid16 ( %p, %p, %p )", ARG1,ARG2,ARG3); |
| PRE_REG_READ3(long, "getresgid16", |
| vki_old_gid_t *, rgid, vki_old_gid_t *, egid, |
| vki_old_gid_t *, sgid); |
| PRE_MEM_WRITE( "getresgid16(rgid)", ARG1, sizeof(vki_old_gid_t) ); |
| PRE_MEM_WRITE( "getresgid16(egid)", ARG2, sizeof(vki_old_gid_t) ); |
| PRE_MEM_WRITE( "getresgid16(sgid)", ARG3, sizeof(vki_old_gid_t) ); |
| } |
| |
| POST(sys_getresgid16) |
| { |
| if (RES == 0) { |
| POST_MEM_WRITE( ARG1, sizeof(vki_old_gid_t) ); |
| POST_MEM_WRITE( ARG2, sizeof(vki_old_gid_t) ); |
| POST_MEM_WRITE( ARG3, sizeof(vki_old_gid_t) ); |
| } |
| } |
| |
| PRE(sys_getresgid, 0) |
| { |
| PRINT("sys_getresgid ( %p, %p, %p )", ARG1,ARG2,ARG3); |
| PRE_REG_READ3(long, "getresgid", |
| vki_gid_t *, rgid, vki_gid_t *, egid, vki_gid_t *, sgid); |
| PRE_MEM_WRITE( "getresgid(rgid)", ARG1, sizeof(vki_gid_t) ); |
| PRE_MEM_WRITE( "getresgid(egid)", ARG2, sizeof(vki_gid_t) ); |
| PRE_MEM_WRITE( "getresgid(sgid)", ARG3, sizeof(vki_gid_t) ); |
| } |
| |
| POST(sys_getresgid) |
| { |
| if (RES == 0) { |
| POST_MEM_WRITE( ARG1, sizeof(vki_gid_t) ); |
| POST_MEM_WRITE( ARG2, sizeof(vki_gid_t) ); |
| POST_MEM_WRITE( ARG3, sizeof(vki_gid_t) ); |
| } |
| } |
| |
| PRE(sys_ioperm, 0) |
| { |
| PRINT("sys_ioperm ( %d, %d, %d )", ARG1, ARG2, ARG3 ); |
| PRE_REG_READ3(long, "ioperm", |
| unsigned long, from, unsigned long, num, int, turn_on); |
| } |
| |
| PRE(sys_syslog, MayBlock) |
| { |
| PRINT("sys_syslog (%d, %p, %d)", ARG1,ARG2,ARG3); |
| PRE_REG_READ3(long, "syslog", int, type, char *, bufp, int, len); |
| switch (ARG1) { |
| // The kernel uses magic numbers here, rather than named constants, |
| // therefore so do we. |
| case 2: case 3: case 4: |
| PRE_MEM_WRITE( "syslog(bufp)", ARG2, ARG3); |
| break; |
| default: |
| break; |
| } |
| } |
| |
| POST(sys_syslog) |
| { |
| switch (ARG1) { |
| case 2: case 3: case 4: |
| POST_MEM_WRITE( ARG2, ARG3 ); |
| break; |
| default: |
| break; |
| } |
| } |
| |
| PRE(sys_vhangup, 0) |
| { |
| PRINT("sys_vhangup ( )"); |
| PRE_REG_READ0(long, "vhangup"); |
| } |
| |
| PRE(sys_sysinfo, 0) |
| { |
| PRINT("sys_sysinfo ( %p )",ARG1); |
| PRE_REG_READ1(long, "sysinfo", struct sysinfo *, info); |
| PRE_MEM_WRITE( "sysinfo(info)", ARG1, sizeof(struct vki_sysinfo) ); |
| } |
| |
| POST(sys_sysinfo) |
| { |
| POST_MEM_WRITE( ARG1, sizeof(struct vki_sysinfo) ); |
| } |
| |
| PRE(sys_personality, 0) |
| { |
| PRINT("sys_personality ( %llu )", (ULong)ARG1); |
| PRE_REG_READ1(long, "personality", vki_u_long, persona); |
| } |
| |
| PRE(sys_sysctl, 0) |
| { |
| struct __vki_sysctl_args *args; |
| PRINT("sys_sysctl ( %p )", ARG1 ); |
| args = (struct __vki_sysctl_args *)ARG1; |
| PRE_REG_READ1(long, "sysctl", struct __sysctl_args *, args); |
| PRE_MEM_WRITE( "sysctl(args)", ARG1, sizeof(struct __vki_sysctl_args) ); |
| if (!VG_(is_addressable)(ARG1, sizeof(struct __vki_sysctl_args), VKI_PROT_READ)) { |
| SET_RESULT( -VKI_EFAULT ); |
| return; |
| } |
| |
| PRE_MEM_READ("sysctl(name)", (Addr)args->name, args->nlen * sizeof(*args->name)); |
| if (args->newval != NULL) |
| PRE_MEM_READ("sysctl(newval)", (Addr)args->newval, args->newlen); |
| if (args->oldlenp != NULL) { |
| PRE_MEM_READ("sysctl(oldlenp)", (Addr)args->oldlenp, sizeof(*args->oldlenp)); |
| PRE_MEM_WRITE("sysctl(oldval)", (Addr)args->oldval, *args->oldlenp); |
| } |
| } |
| |
| POST(sys_sysctl) |
| { |
| struct __vki_sysctl_args *args; |
| args = (struct __vki_sysctl_args *)ARG1; |
| if (args->oldlenp != NULL) { |
| POST_MEM_WRITE((Addr)args->oldlenp, sizeof(*args->oldlenp)); |
| POST_MEM_WRITE((Addr)args->oldval, 1 + *args->oldlenp); |
| } |
| } |
| |
| PRE(sys_prctl, MayBlock) |
| { |
| PRINT( "prctl ( %d, %d, %d, %d, %d )", ARG1, ARG2, ARG3, ARG4, ARG5 ); |
| // XXX: too simplistic, often not all args are used |
| // Nb: can't use "ARG2".."ARG5" here because that's our own macro... |
| PRE_REG_READ5(long, "prctl", |
| int, option, unsigned long, arg2, unsigned long, arg3, |
| unsigned long, arg4, unsigned long, arg5); |
| // XXX: totally wrong... we need to look at the 'option' arg, and do |
| // PRE_MEM_READs/PRE_MEM_WRITEs as necessary... |
| } |
| |
| PRE(sys_sendfile, MayBlock) |
| { |
| PRINT("sys_sendfile ( %d, %d, %p, %llu )", ARG1,ARG2,ARG3,(ULong)ARG4); |
| PRE_REG_READ4(ssize_t, "sendfile", |
| int, out_fd, int, in_fd, vki_off_t *, offset, |
| vki_size_t, count); |
| if (ARG3 != 0) |
| PRE_MEM_WRITE( "sendfile(offset)", ARG3, sizeof(vki_off_t) ); |
| } |
| |
| POST(sys_sendfile) |
| { |
| POST_MEM_WRITE( ARG3, sizeof( vki_off_t ) ); |
| } |
| |
| PRE(sys_sendfile64, MayBlock) |
| { |
| PRINT("sendfile64 ( %d, %d, %p, %llu )",ARG1,ARG2,ARG3,(ULong)ARG4); |
| PRE_REG_READ4(ssize_t, "sendfile64", |
| int, out_fd, int, in_fd, vki_loff_t *, offset, |
| vki_size_t, count); |
| if (ARG3 != 0) |
| PRE_MEM_WRITE( "sendfile64(offset)", ARG3, sizeof(vki_loff_t) ); |
| } |
| |
| POST(sys_sendfile64) |
| { |
| if (ARG3 != 0 ) { |
| POST_MEM_WRITE( ARG3, sizeof(vki_loff_t) ); |
| } |
| } |
| |
| PRE(sys_futex, MayBlock) |
| { |
| /* |
| arg param used by ops |
| |
| ARG1 - u32 *futex all |
| ARG2 - int op |
| ARG3 - int val WAIT,WAKE,FD,REQUEUE,CMP_REQUEUE |
| ARG4 - struct timespec *utime WAIT:time* REQUEUE,CMP_REQUEUE:val2 |
| ARG5 - u32 *uaddr2 REQUEUE,CMP_REQUEUE |
| ARG6 - int val3 CMP_REQUEUE |
| */ |
| PRINT("sys_futex ( %p, %d, %d, %p, %p )", ARG1,ARG2,ARG3,ARG4,ARG5); |
| PRE_REG_READ6(long, "futex", |
| vki_u32 *, futex, int, op, int, val, |
| struct timespec *, utime, vki_u32 *, uaddr2, int, val3); |
| |
| PRE_MEM_READ( "futex(futex)", ARG1, sizeof(Int) ); |
| |
| switch(ARG2) { |
| case VKI_FUTEX_WAIT: |
| if (ARG4 != 0) |
| PRE_MEM_READ( "futex(timeout)", ARG4, sizeof(struct vki_timespec) ); |
| break; |
| |
| case VKI_FUTEX_REQUEUE: |
| case VKI_FUTEX_CMP_REQUEUE: |
| PRE_MEM_READ( "futex(futex2)", ARG5, sizeof(Int) ); |
| break; |
| |
| case VKI_FUTEX_WAKE: |
| case VKI_FUTEX_FD: |
| /* no additional pointers */ |
| break; |
| |
| default: |
| SET_RESULT(-VKI_ENOSYS); // some futex function we don't understand |
| break; |
| } |
| } |
| |
| POST(sys_futex) |
| { |
| POST_MEM_WRITE( ARG1, sizeof(int) ); |
| if (ARG2 == VKI_FUTEX_FD) { |
| if (!VG_(fd_allowed)(RES, "futex", tid, True)) { |
| VG_(close)(RES); |
| SET_RESULT( -VKI_EMFILE ); |
| } else { |
| if (VG_(clo_track_fds)) |
| VG_(record_fd_open)(tid, RES, VG_(arena_strdup)(VG_AR_CORE, (Char*)ARG1)); |
| } |
| } |
| } |
| |
| PRE(sys_epoll_create, 0) |
| { |
| PRINT("sys_epoll_create ( %d )", ARG1); |
| PRE_REG_READ1(long, "epoll_create", int, size); |
| } |
| |
| POST(sys_epoll_create) |
| { |
| if (!VG_(fd_allowed)(RES, "epoll_create", tid, True)) { |
| VG_(close)(RES); |
| SET_RESULT( -VKI_EMFILE ); |
| } else { |
| if (VG_(clo_track_fds)) |
| VG_(record_fd_open) (tid, RES, NULL); |
| } |
| } |
| |
| PRE(sys_epoll_ctl, 0) |
| { |
| static const char* epoll_ctl_s[3] = { |
| "EPOLL_CTL_ADD", |
| "EPOLL_CTL_DEL", |
| "EPOLL_CTL_MOD" |
| }; |
| PRINT("sys_epoll_ctl ( %d, %s, %d, %p )", |
| ARG1, ( ARG2<3 ? epoll_ctl_s[ARG2] : "?" ), ARG3, ARG4); |
| PRE_REG_READ4(long, "epoll_ctl", |
| int, epfd, int, op, int, fd, struct epoll_event *, event); |
| PRE_MEM_READ( "epoll_ctl(event)", ARG4, sizeof(struct epoll_event) ); |
| } |
| |
| PRE(sys_epoll_wait, MayBlock) |
| { |
| PRINT("sys_epoll_wait ( %d, %p, %d, %d )", ARG1, ARG2, ARG3, ARG4); |
| PRE_REG_READ4(long, "epoll_wait", |
| int, epfd, struct epoll_event *, events, |
| int, maxevents, int, timeout); |
| PRE_MEM_WRITE( "epoll_wait(events)", ARG2, sizeof(struct epoll_event)*ARG3); |
| } |
| |
| POST(sys_epoll_wait) |
| { |
| if (RES > 0) |
| POST_MEM_WRITE( ARG2, sizeof(struct epoll_event)*RES ) ; |
| } |
| |
| PRE(sys_gettid, 0) |
| { |
| PRINT("sys_gettid ()"); |
| PRE_REG_READ0(long, "gettid"); |
| } |
| |
| PRE(sys_tkill, Special) |
| { |
| /* int tkill(pid_t tid, int sig); */ |
| PRINT("sys_tkill ( %d, %d )", ARG1,ARG2); |
| PRE_REG_READ2(long, "tkill", int, tid, int, sig); |
| if (!VG_(client_signal_OK)(ARG2)) { |
| SET_RESULT( -VKI_EINVAL ); |
| return; |
| } |
| |
| /* If we're sending SIGKILL, check to see if the target is one of |
| our threads and handle it specially. */ |
| if (ARG2 == VKI_SIGKILL && VG_(do_sigkill)(ARG1, -1)) |
| SET_RESULT(0); |
| else |
| SET_RESULT(VG_(do_syscall2)(SYSNO, ARG1, ARG2)); |
| |
| if (VG_(clo_trace_signals)) |
| VG_(message)(Vg_DebugMsg, "tkill: sent signal %d to pid %d", |
| ARG2, ARG1); |
| // Check to see if this kill gave us a pending signal |
| VG_(poll_signals)(tid); |
| } |
| |
| PRE(sys_tgkill, Special) |
| { |
| /* int tgkill(pid_t tgid, pid_t tid, int sig); */ |
| PRINT("sys_tgkill ( %d, %d, %d )", ARG1,ARG2,ARG3); |
| PRE_REG_READ3(long, "tgkill", int, tgid, int, tid, int, sig); |
| if (!VG_(client_signal_OK)(ARG3)) { |
| SET_RESULT( -VKI_EINVAL ); |
| return; |
| } |
| |
| /* If we're sending SIGKILL, check to see if the target is one of |
| our threads and handle it specially. */ |
| if (ARG3 == VKI_SIGKILL && VG_(do_sigkill)(ARG2, ARG1)) |
| SET_RESULT(0); |
| else |
| SET_RESULT(VG_(do_syscall3)(SYSNO, ARG1, ARG2, ARG3)); |
| |
| if (VG_(clo_trace_signals)) |
| VG_(message)(Vg_DebugMsg, "tgkill: sent signal %d to pid %d/%d", |
| ARG3, ARG1, ARG2); |
| // Check to see if this kill gave us a pending signal |
| VG_(poll_signals)(tid); |
| } |
| |
| POST(sys_tgkill) |
| { |
| if (VG_(clo_trace_signals)) |
| VG_(message)(Vg_DebugMsg, "tgkill: sent signal %d to pid %d/%d", |
| ARG3, ARG1, ARG2); |
| // Check to see if this kill gave us a pending signal |
| VG_(poll_signals)(tid); |
| } |
| |
| PRE(sys_fadvise64, 0) |
| { |
| PRINT("sys_fadvise64 ( %d, %lld, %lu, %d )", ARG1,ARG2,ARG3); |
| PRE_REG_READ4(long, "fadvise64", |
| int, fd, vki_loff_t, offset, vki_size_t, len, int, advice) |
| } |
| |
| PRE(sys_fadvise64_64, 0) |
| { |
| PRINT("sys_fadvise64_64 ( %d, %lld, %lld, %d )", ARG1,ARG2,ARG3); |
| PRE_REG_READ4(long, "fadvise64_64", |
| int, fd, vki_loff_t, offset, vki_loff_t, len, int, advice) |
| } |
| |
| // Nb: this wrapper is "Special" because we have to pad/unpad memory around |
| // the syscall itself, and this allows us to control exactly the code that |
| // gets run while the padding is in place. |
| PRE(sys_io_setup, Special) |
| { |
| SizeT size; |
| Addr addr; |
| |
| PRINT("sys_io_setup ( %u, %p )", ARG1,ARG2); |
| PRE_REG_READ2(long, "io_setup", |
| unsigned, nr_events, vki_aio_context_t *, ctxp); |
| PRE_MEM_WRITE( "io_setup(ctxp)", ARG2, sizeof(vki_aio_context_t) ); |
| |
| size = VG_PGROUNDUP(sizeof(struct vki_aio_ring) + |
| ARG1*sizeof(struct vki_io_event)); |
| addr = VG_(find_map_space)(0, size, True); |
| |
| if (addr == 0) { |
| SET_RESULT( -VKI_ENOMEM ); |
| return; |
| } |
| |
| VG_(map_segment)(addr, size, VKI_PROT_READ|VKI_PROT_WRITE, SF_FIXED); |
| |
| VG_(pad_address_space)(0); |
| SET_RESULT( VG_(do_syscall2)(SYSNO, ARG1, ARG2) ); |
| VG_(unpad_address_space)(0); |
| |
| if (RES == 0) { |
| struct vki_aio_ring *r = *(struct vki_aio_ring **)ARG2; |
| |
| vg_assert(addr == (Addr)r); |
| vg_assert(VG_(valid_client_addr)(addr, size, tid, "io_setup")); |
| |
| VG_TRACK( new_mem_mmap, addr, size, True, True, False ); |
| POST_MEM_WRITE( ARG2, sizeof(vki_aio_context_t) ); |
| } |
| else { |
| VG_(unmap_range)(addr, size); |
| } |
| } |
| |
| // Nb: This wrapper is "Special" because we need 'size' to do the unmap |
| // after the syscall. We must get 'size' from the aio_ring structure, |
| // before the syscall, while the aio_ring structure still exists. (And we |
| // know that we must look at the aio_ring structure because Tom inspected the |
| // kernel and glibc sources to see what they do, yuk.) |
| // |
| // XXX This segment can be implicitly unmapped when aio |
| // file-descriptors are closed... |
| PRE(sys_io_destroy, Special) |
| { |
| Segment *s = VG_(find_segment)(ARG1); |
| struct vki_aio_ring *r; |
| SizeT size; |
| |
| PRINT("sys_io_destroy ( %llu )", (ULong)ARG1); |
| PRE_REG_READ1(long, "io_destroy", vki_aio_context_t, ctx); |
| |
| // If we are going to seg fault (due to a bogus ARG1) do it as late as |
| // possible... |
| r = *(struct vki_aio_ring **)ARG1; |
| size = VG_PGROUNDUP(sizeof(struct vki_aio_ring) + |
| r->nr*sizeof(struct vki_io_event)); |
| |
| SET_RESULT( VG_(do_syscall1)(SYSNO, ARG1) ); |
| |
| if (RES == 0 && s != NULL) { |
| VG_TRACK( die_mem_munmap, ARG1, size ); |
| VG_(unmap_range)(ARG1, size); |
| } |
| } |
| |
| PRE(sys_io_getevents, MayBlock) |
| { |
| PRINT("sys_io_getevents ( %llu, %lld, %lld, %p, %p )", |
| (ULong)ARG1,(Long)ARG2,(Long)ARG3,ARG4,ARG5); |
| PRE_REG_READ5(long, "io_getevents", |
| vki_aio_context_t, ctx_id, long, min_nr, long, nr, |
| struct io_event *, events, |
| struct timespec *, timeout); |
| if (ARG3 > 0) |
| PRE_MEM_WRITE( "io_getevents(events)", |
| ARG4, sizeof(struct vki_io_event)*ARG3 ); |
| if (ARG5 != 0) |
| PRE_MEM_READ( "io_getevents(timeout)", |
| ARG5, sizeof(struct vki_timespec)); |
| } |
| |
| POST(sys_io_getevents) |
| { |
| int i; |
| |
| if (RES > 0) { |
| POST_MEM_WRITE( ARG4, sizeof(struct vki_io_event)*RES ); |
| for (i = 0; i < RES; i++) { |
| const struct vki_io_event *vev = ((struct vki_io_event *)ARG4) + i; |
| const struct vki_iocb *cb = (struct vki_iocb *)(Addr)vev->obj; |
| |
| switch (cb->aio_lio_opcode) { |
| case VKI_IOCB_CMD_PREAD: |
| if (vev->result > 0) |
| POST_MEM_WRITE( cb->aio_buf, vev->result ); |
| break; |
| |
| case VKI_IOCB_CMD_PWRITE: |
| break; |
| |
| default: |
| VG_(message)(Vg_DebugMsg,"Warning: unhandled io_getevents opcode: %u\n",cb->aio_lio_opcode); |
| break; |
| } |
| } |
| } |
| } |
| |
| PRE(sys_io_submit, 0) |
| { |
| int i; |
| |
| PRINT("sys_io_submit( %llu, %lld, %p )", (ULong)ARG1,(Long)ARG2,ARG3); |
| PRE_REG_READ3(long, "io_submit", |
| vki_aio_context_t, ctx_id, long, nr, |
| struct iocb **, iocbpp); |
| PRE_MEM_READ( "io_submit(iocbpp)", ARG3, ARG2*sizeof(struct vki_iocb *) ); |
| if (ARG3 != 0) { |
| for (i = 0; i < ARG2; i++) { |
| struct vki_iocb *cb = ((struct vki_iocb **)ARG3)[i]; |
| PRE_MEM_READ( "io_submit(iocb)", (Addr)cb, sizeof(struct vki_iocb) ); |
| switch (cb->aio_lio_opcode) { |
| case VKI_IOCB_CMD_PREAD: |
| PRE_MEM_WRITE( "io_submit(PREAD)", cb->aio_buf, cb->aio_nbytes ); |
| break; |
| |
| case VKI_IOCB_CMD_PWRITE: |
| PRE_MEM_READ( "io_submit(PWRITE)", cb->aio_buf, cb->aio_nbytes ); |
| break; |
| |
| default: |
| VG_(message)(Vg_DebugMsg,"Warning: unhandled io_submit opcode: %u\n", |
| cb->aio_lio_opcode); |
| break; |
| } |
| } |
| } |
| } |
| |
| PRE(sys_io_cancel, 0) |
| { |
| PRINT("sys_io_cancel( %llu, %p, %p )", (ULong)ARG1,ARG2,ARG3); |
| PRE_REG_READ3(long, "io_cancel", |
| vki_aio_context_t, ctx_id, struct iocb *, iocb, |
| struct io_event *, result); |
| PRE_MEM_READ( "io_cancel(iocb)", ARG2, sizeof(struct vki_iocb) ); |
| PRE_MEM_WRITE( "io_cancel(result)", ARG3, sizeof(struct vki_io_event) ); |
| } |
| |
| POST(sys_io_cancel) |
| { |
| POST_MEM_WRITE( ARG3, sizeof(struct vki_io_event) ); |
| } |
| |
| #undef PRE |
| #undef POST |
| |
| /*--------------------------------------------------------------------*/ |
| /*--- end ---*/ |
| /*--------------------------------------------------------------------*/ |