/*--------------------------------------------------------------------*/ /*--- Platform-specific syscalls stuff. x86-linux/syscalls.c ---*/ /*--------------------------------------------------------------------*/ /* This file is part of Valgrind, an extensible x86 protected-mode emulator for monitoring program execution on x86-Unixes. Copyright (C) 2000-2004 Nicholas Nethercote njn25@cam.ac.uk 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" // See the comment accompanying the declaration of VGA_(thread_syscall)() in // coregrind/core.h for an explanation of what this does, and why. asm( ".text\n" " .type vgArch_do_thread_syscall,@function\n" ".globl vgArch_do_thread_syscall\n" "vgArch_do_thread_syscall:\n" " push %esi\n" " push %edi\n" " push %ebx\n" " push %ebp\n" ".vgArch_sys_before:\n" " movl 16+ 4(%esp),%eax\n" /* syscall */ " movl 16+ 8(%esp),%ebx\n" /* arg1 */ " movl 16+12(%esp),%ecx\n" /* arg2 */ " movl 16+16(%esp),%edx\n" /* arg3 */ " movl 16+20(%esp),%esi\n" /* arg4 */ " movl 16+24(%esp),%edi\n" /* arg5 */ " movl 16+28(%esp),%ebp\n" /* arg6 */ ".vgArch_sys_restarted:\n" " int $0x80\n" ".vgArch_sys_after:\n" " movl 16+32(%esp),%ebx\n" /* ebx = Int *RES */ " movl %eax, (%ebx)\n" /* write the syscall retval */ " movl 16+36(%esp),%ebx\n" /* ebx = enum PXState * */ " testl %ebx, %ebx\n" " jz 1f\n" " movl 16+40(%esp),%ecx\n" /* write the post state (must be after retval write) */ " movl %ecx,(%ebx)\n" ".vgArch_sys_done:\n" /* OK, all clear from here */ "1: popl %ebp\n" " popl %ebx\n" " popl %edi\n" " popl %esi\n" " ret\n" " .size vgArch_do_thread_syscall,.-vgArch_do_thread_syscall\n" ".previous\n" ".section .rodata\n" " .globl vgArch_sys_before\n" "vgArch_sys_before: .long .vgArch_sys_before\n" " .globl vgArch_sys_restarted\n" "vgArch_sys_restarted: .long .vgArch_sys_restarted\n" " .globl vgArch_sys_after\n" "vgArch_sys_after: .long .vgArch_sys_after\n" " .globl vgArch_sys_done\n" "vgArch_sys_done: .long .vgArch_sys_done\n" ".previous\n" ); // Back up to restart a system call. void VGA_(restart_syscall)(ThreadArchState *arch) { arch->vex.guest_EIP -= 2; // sizeof(int $0x80) /* Make sure our caller is actually sane, and we're really backing back over a syscall. int $0x80 == CD 80 */ { UChar *p = (UChar *)arch->vex.guest_EIP; if (p[0] != 0xcd || p[1] != 0x80) VG_(message)(Vg_DebugMsg, "?! restarting over syscall at %p %02x %02x\n", arch->vex.guest_EIP, p[0], p[1]); vg_assert(p[0] == 0xcd && p[1] == 0x80); } } /* --------------------------------------------------------------------- PRE/POST wrappers for x86/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(static, x86_linux, name, f) #define POST(name) POST_TEMPLATE(static, x86_linux, name) PRE(old_select, MayBlock) { /* struct sel_arg_struct { unsigned long n; fd_set *inp, *outp, *exp; struct timeval *tvp; }; */ PRE_REG_READ1(long, "old_select", struct sel_arg_struct *, args); PRE_MEM_READ( "old_select(args)", ARG1, 5*sizeof(UWord) ); { UInt* arg_struct = (UInt*)ARG1; UInt a1, a2, a3, a4, a5; a1 = arg_struct[0]; a2 = arg_struct[1]; a3 = arg_struct[2]; a4 = arg_struct[3]; a5 = arg_struct[4]; PRINT("old_select ( %d, %p, %p, %p, %p )", a1,a2,a3,a4,a5); if (a2 != (Addr)NULL) PRE_MEM_READ( "old_select(readfds)", a2, a1/8 /* __FD_SETSIZE/8 */ ); if (a3 != (Addr)NULL) PRE_MEM_READ( "old_select(writefds)", a3, a1/8 /* __FD_SETSIZE/8 */ ); if (a4 != (Addr)NULL) PRE_MEM_READ( "old_select(exceptfds)", a4, a1/8 /* __FD_SETSIZE/8 */ ); if (a5 != (Addr)NULL) PRE_MEM_READ( "old_select(timeout)", a5, sizeof(struct vki_timeval) ); } } PRE(sys_clone, Special) { PRINT("sys_clone ( %d, %p, %p, %p, %p )",ARG1,ARG2,ARG3,ARG4,ARG5); // XXX: really not sure about the last two args... if they are really // there, we should do PRE_MEM_READs for both of them... PRE_REG_READ4(int, "clone", unsigned long, flags, void *, child_stack, int *, parent_tidptr, int *, child_tidptr); if (ARG2 == 0 && (ARG1 == (VKI_CLONE_CHILD_CLEARTID|VKI_CLONE_CHILD_SETTID|VKI_SIGCHLD) || ARG1 == (VKI_CLONE_PARENT_SETTID|VKI_SIGCHLD))) { VGA_(gen_sys_fork_before)(tid, tst); SET_RESULT( VG_(do_syscall5)(SYSNO, ARG1, ARG2, ARG3, ARG4, ARG5) ); VGA_(gen_sys_fork_after) (tid, tst); } else { VG_(unimplemented) ("clone(): not supported by Valgrind.\n " "We do support programs linked against\n " "libpthread.so, though. Re-run with -v and ensure that\n " "you are picking up Valgrind's implementation of libpthread.so."); } } PRE(sys_modify_ldt, Special) { PRINT("sys_modify_ldt ( %d, %p, %d )", ARG1,ARG2,ARG3); PRE_REG_READ3(int, "modify_ldt", int, func, void *, ptr, unsigned long, bytecount); if (ARG1 == 0) { /* read the LDT into ptr */ PRE_MEM_WRITE( "modify_ldt(ptr)", ARG2, ARG3 ); } if (ARG1 == 1 || ARG1 == 0x11) { /* write the LDT with the entry pointed at by ptr */ PRE_MEM_READ( "modify_ldt(ptr)", ARG2, sizeof(vki_modify_ldt_t) ); } /* "do" the syscall ourselves; the kernel never sees it */ RES = VG_(sys_modify_ldt)( tid, ARG1, (void*)ARG2, ARG3 ); if (ARG1 == 0 && !VG_(is_kerror)(RES) && RES > 0) { POST_MEM_WRITE( ARG2, RES ); } } PRE(sys_set_thread_area, Special) { PRINT("sys_set_thread_area ( %p )", ARG1); PRE_REG_READ1(int, "set_thread_area", struct user_desc *, u_info) PRE_MEM_READ( "set_thread_area(u_info)", ARG1, sizeof(vki_modify_ldt_t) ); /* "do" the syscall ourselves; the kernel never sees it */ SET_RESULT( VG_(sys_set_thread_area)( tid, (void *)ARG1 ) ); } PRE(sys_get_thread_area, Special) { PRINT("sys_get_thread_area ( %p )", ARG1); PRE_REG_READ1(int, "get_thread_area", struct user_desc *, u_info) PRE_MEM_WRITE( "get_thread_area(u_info)", ARG1, sizeof(vki_modify_ldt_t) ); /* "do" the syscall ourselves; the kernel never sees it */ SET_RESULT( VG_(sys_get_thread_area)( tid, (void *)ARG1 ) ); if (!VG_(is_kerror)(RES)) { POST_MEM_WRITE( ARG1, sizeof(vki_modify_ldt_t) ); } } // Parts of this are x86-specific, but the *PEEK* cases are generic. // XXX: Why is the memory pointed to by ARG3 never checked? PRE(sys_ptrace, 0) { PRINT("sys_ptrace ( %d, %d, %p, %p )", ARG1,ARG2,ARG3,ARG4); PRE_REG_READ4(int, "ptrace", long, request, long, pid, long, addr, long, data); switch (ARG1) { case VKI_PTRACE_PEEKTEXT: case VKI_PTRACE_PEEKDATA: case VKI_PTRACE_PEEKUSR: PRE_MEM_WRITE( "ptrace(peek)", ARG4, sizeof (long)); break; case VKI_PTRACE_GETREGS: PRE_MEM_WRITE( "ptrace(getregs)", ARG4, sizeof (struct vki_user_regs_struct)); break; case VKI_PTRACE_GETFPREGS: PRE_MEM_WRITE( "ptrace(getfpregs)", ARG4, sizeof (struct vki_user_i387_struct)); break; case VKI_PTRACE_GETFPXREGS: PRE_MEM_WRITE( "ptrace(getfpxregs)", ARG4, sizeof(struct vki_user_fxsr_struct) ); break; case VKI_PTRACE_SETREGS: PRE_MEM_READ( "ptrace(setregs)", ARG4, sizeof (struct vki_user_regs_struct)); break; case VKI_PTRACE_SETFPREGS: PRE_MEM_READ( "ptrace(setfpregs)", ARG4, sizeof (struct vki_user_i387_struct)); break; case VKI_PTRACE_SETFPXREGS: PRE_MEM_READ( "ptrace(setfpxregs)", ARG4, sizeof(struct vki_user_fxsr_struct) ); break; default: break; } } POST(sys_ptrace) { switch (ARG1) { case VKI_PTRACE_PEEKTEXT: case VKI_PTRACE_PEEKDATA: case VKI_PTRACE_PEEKUSR: POST_MEM_WRITE( ARG4, sizeof (long)); break; case VKI_PTRACE_GETREGS: POST_MEM_WRITE( ARG4, sizeof (struct vki_user_regs_struct)); break; case VKI_PTRACE_GETFPREGS: POST_MEM_WRITE( ARG4, sizeof (struct vki_user_i387_struct)); break; case VKI_PTRACE_GETFPXREGS: POST_MEM_WRITE( ARG4, sizeof(struct vki_user_fxsr_struct) ); break; default: break; } } static UInt get_shm_size ( Int shmid ) { struct vki_shmid_ds buf; long __res = VG_(do_syscall5)(__NR_ipc, 24 /* IPCOP_shmctl */, shmid, VKI_IPC_STAT, 0, (UWord)&buf); if ( VG_(is_kerror) ( __res ) ) return 0; return buf.shm_segsz; } static UInt get_sem_count( Int semid ) { struct vki_semid_ds buf; union vki_semun arg; long res; arg.buf = &buf; res = VG_(do_syscall5)(__NR_ipc, 3 /* IPCOP_semctl */, semid, 0, VKI_IPC_STAT, (UWord)&arg); if ( VG_(is_kerror)(res) ) return 0; return buf.sem_nsems; } // XXX: this duplicates a function in coregrind/vg_syscalls.c, yuk static Addr deref_Addr ( ThreadId tid, Addr a, Char* s ) { Addr* a_p = (Addr*)a; PRE_MEM_READ( s, (Addr)a_p, sizeof(Addr) ); return *a_p; } // XXX: should use the constants here (eg. SHMAT), not the numbers directly! PRE(sys_ipc, 0) { PRINT("sys_ipc ( %d, %d, %d, %d, %p, %d )", ARG1,ARG2,ARG3,ARG4,ARG5,ARG6); // XXX: this is simplistic -- some args are not used in all circumstances. PRE_REG_READ6(int, "ipc", vki_uint, call, int, first, int, second, int, third, void *, ptr, long, fifth) switch (ARG1 /* call */) { case VKI_SEMOP: PRE_MEM_READ( "semop(sops)", ARG5, ARG3 * sizeof(struct vki_sembuf) ); tst->sys_flags |= MayBlock; break; case VKI_SEMGET: break; case VKI_SEMCTL: { union vki_semun *arg = (union vki_semun *)ARG5; switch (ARG4 /* cmd */) { case VKI_IPC_INFO: case VKI_SEM_INFO: { Addr buf = deref_Addr( tid, (Addr)&arg->__buf, "semctl(IPC_INFO, arg)" ); PRE_MEM_WRITE( "semctl(IPC_INFO, arg->buf)", buf, sizeof(struct vki_seminfo) ); break; } case VKI_IPC_STAT: case VKI_SEM_STAT: { Addr buf = deref_Addr( tid, (Addr)&arg->buf, "semctl(IPC_STAT, arg)" ); PRE_MEM_WRITE( "semctl(IPC_STAT, arg->buf)", buf, sizeof(struct vki_semid_ds) ); break; } case VKI_IPC_SET: { Addr buf = deref_Addr( tid, (Addr)&arg->buf, "semctl(IPC_SET, arg)" ); PRE_MEM_READ( "semctl(IPC_SET, arg->buf)", buf, sizeof(struct vki_semid_ds) ); break; } case VKI_GETALL: { Addr array = deref_Addr( tid, (Addr)&arg->array, "semctl(IPC_GETALL, arg)" ); UInt nsems = get_sem_count( ARG2 ); PRE_MEM_WRITE( "semctl(IPC_GETALL, arg->array)", array, sizeof(short) * nsems ); break; } case VKI_SETALL: { Addr array = deref_Addr( tid, (Addr)&arg->array, "semctl(IPC_SETALL, arg)" ); UInt nsems = get_sem_count( ARG2 ); PRE_MEM_READ( "semctl(IPC_SETALL, arg->array)", array, sizeof(short) * nsems ); break; } case VKI_SETVAL: { PRE_MEM_READ( "semctl(IPC_SETVAL, arg->array)", (Addr)&arg->val, sizeof(arg->val) ); break; } case VKI_IPC_INFO|VKI_IPC_64: case VKI_SEM_INFO|VKI_IPC_64: { Addr buf = deref_Addr( tid, (Addr)&arg->__buf, "semctl(IPC_INFO, arg)" ); PRE_MEM_WRITE( "semctl(IPC_INFO, arg->buf)", buf, sizeof(struct vki_seminfo) ); break; } case VKI_IPC_STAT|VKI_IPC_64: case VKI_SEM_STAT|VKI_IPC_64: { Addr buf = deref_Addr( tid, (Addr)&arg->buf, "semctl(IPC_STAT, arg)" ); PRE_MEM_WRITE( "semctl(IPC_STAT, arg->buf)", buf, sizeof(struct vki_semid64_ds) ); break; } case VKI_IPC_SET|VKI_IPC_64: { Addr buf = deref_Addr( tid, (Addr)&arg->buf, "semctl(IPC_SET, arg)" ); PRE_MEM_READ( "semctl(IPC_SET, arg->buf)", buf, sizeof(struct vki_semid64_ds) ); break; } case VKI_GETALL|VKI_IPC_64: { Addr array = deref_Addr( tid, (Addr)&arg->array, "semctl(IPC_GETALL, arg)" ); UInt nsems = get_sem_count( ARG2 ); PRE_MEM_WRITE( "semctl(IPC_GETALL, arg->array)", array, sizeof(short) * nsems ); break; } case VKI_SETALL|VKI_IPC_64: { Addr array = deref_Addr( tid, (Addr)&arg->array, "semctl(IPC_SETALL, arg)" ); UInt nsems = get_sem_count( ARG2 ); PRE_MEM_READ( "semctl(IPC_SETALL, arg->array)", array, sizeof(short) * nsems ); break; } case VKI_SETVAL|VKI_IPC_64: { PRE_MEM_READ( "semctl(IPC_SETVAL, arg->array)", (Addr)&arg->val, sizeof(arg->val) ); break; } default: break; } break; } case VKI_SEMTIMEDOP: PRE_MEM_READ( "semtimedop(sops)", ARG5, ARG3 * sizeof(struct vki_sembuf) ); if (ARG6 != 0) PRE_MEM_READ( "semtimedop(timeout)", ARG6, sizeof(struct vki_timespec) ); tst->sys_flags |= MayBlock; break; case VKI_MSGSND: { struct vki_msgbuf *msgp = (struct vki_msgbuf *)ARG5; Int msgsz = ARG3; PRE_MEM_READ( "msgsnd(msgp->mtype)", (Addr)&msgp->mtype, sizeof(msgp->mtype) ); PRE_MEM_READ( "msgsnd(msgp->mtext)", (Addr)msgp->mtext, msgsz ); if ((ARG4 & VKI_IPC_NOWAIT) == 0) tst->sys_flags |= MayBlock; break; } case VKI_MSGRCV: { struct vki_msgbuf *msgp; Int msgsz = ARG3; msgp = (struct vki_msgbuf *)deref_Addr( tid, (Addr) (&((struct vki_ipc_kludge *)ARG5)->msgp), "msgrcv(msgp)" ); PRE_MEM_WRITE( "msgrcv(msgp->mtype)", (Addr)&msgp->mtype, sizeof(msgp->mtype) ); PRE_MEM_WRITE( "msgrcv(msgp->mtext)", (Addr)msgp->mtext, msgsz ); if ((ARG4 & VKI_IPC_NOWAIT) == 0) tst->sys_flags |= MayBlock; break; } case VKI_MSGGET: break; case VKI_MSGCTL: { switch (ARG3 /* cmd */) { case VKI_IPC_INFO: case VKI_MSG_INFO: PRE_MEM_WRITE( "msgctl(IPC_INFO, buf)", ARG5, sizeof(struct vki_msginfo) ); break; case VKI_IPC_STAT: case VKI_MSG_STAT: PRE_MEM_WRITE( "msgctl(IPC_STAT, buf)", ARG5, sizeof(struct vki_msqid_ds) ); break; case VKI_IPC_SET: PRE_MEM_READ( "msgctl(IPC_SET, buf)", ARG5, sizeof(struct vki_msqid_ds) ); break; case VKI_IPC_INFO|VKI_IPC_64: case VKI_MSG_INFO|VKI_IPC_64: PRE_MEM_WRITE( "msgctl(IPC_INFO, buf)", ARG5, sizeof(struct vki_msginfo) ); break; case VKI_IPC_STAT|VKI_IPC_64: case VKI_MSG_STAT|VKI_IPC_64: PRE_MEM_WRITE( "msgctl(IPC_STAT, buf)", ARG5, sizeof(struct vki_msqid64_ds) ); break; case VKI_IPC_SET|VKI_IPC_64: PRE_MEM_READ( "msgctl(IPC_SET, buf)", ARG5, sizeof(struct vki_msqid64_ds) ); break; default: break; } break; } case VKI_SHMAT: { UInt shmid = ARG2; UInt segmentSize = get_shm_size ( shmid ); /* If they didn't ask for a particular address, then place it like an mmap. */ if (ARG5 == 0) ARG5 = VG_(find_map_space)(0, segmentSize, True); else if (!VG_(valid_client_addr)(ARG5, segmentSize, tid, "shmat")) SET_RESULT( -VKI_EINVAL ); break; } case VKI_SHMDT: if (!VG_(valid_client_addr)(ARG5, 1, tid, "shmdt")) SET_RESULT( -VKI_EINVAL ); break; case VKI_SHMGET: break; case VKI_SHMCTL: /* IPCOP_shmctl */ { switch (ARG3 /* cmd */) { case VKI_IPC_INFO: PRE_MEM_WRITE( "shmctl(IPC_INFO, buf)", ARG5, sizeof(struct vki_shminfo) ); break; case VKI_SHM_INFO: PRE_MEM_WRITE( "shmctl(SHM_INFO, buf)", ARG5, sizeof(struct vki_shm_info) ); break; case VKI_IPC_STAT: case VKI_SHM_STAT: PRE_MEM_WRITE( "shmctl(IPC_STAT, buf)", ARG5, sizeof(struct vki_shmid_ds) ); break; case VKI_IPC_SET: PRE_MEM_READ( "shmctl(IPC_SET, buf)", ARG5, sizeof(struct vki_shmid_ds) ); break; case VKI_IPC_INFO|VKI_IPC_64: PRE_MEM_WRITE( "shmctl(IPC_INFO, buf)", ARG5, sizeof(struct vki_shminfo64) ); break; case VKI_SHM_INFO|VKI_IPC_64: PRE_MEM_WRITE( "shmctl(SHM_INFO, buf)", ARG5, sizeof(struct vki_shm_info) ); break; case VKI_IPC_STAT|VKI_IPC_64: case VKI_SHM_STAT|VKI_IPC_64: PRE_MEM_WRITE( "shmctl(IPC_STAT, buf)", ARG5, sizeof(struct vki_shmid64_ds) ); break; case VKI_IPC_SET|VKI_IPC_64: PRE_MEM_READ( "shmctl(IPC_SET, buf)", ARG5, sizeof(struct vki_shmid_ds) ); break; default: break; } break; } default: VG_(message)(Vg_DebugMsg, "FATAL: unhandled syscall(ipc) %d", ARG1 ); VG_(core_panic)("... bye!\n"); break; /*NOTREACHED*/ } } POST(sys_ipc) { switch (ARG1 /* call */) { case VKI_SEMOP: case VKI_SEMGET: break; case VKI_SEMCTL: { union vki_semun *arg = (union vki_semun *)ARG5; switch (ARG4 /* cmd */) { case VKI_IPC_INFO: case VKI_SEM_INFO: { Addr buf = deref_Addr( tid, (Addr)&arg->__buf, "semctl(arg)" ); POST_MEM_WRITE( buf, sizeof(struct vki_seminfo) ); break; } case VKI_IPC_STAT: case VKI_SEM_STAT: { Addr buf = deref_Addr( tid, (Addr)&arg->buf, "semctl(arg)" ); POST_MEM_WRITE( buf, sizeof(struct vki_semid_ds) ); break; } case VKI_GETALL: { Addr array = deref_Addr( tid, (Addr)&arg->array, "semctl(arg)" ); UInt nsems = get_sem_count( ARG2 ); POST_MEM_WRITE( array, sizeof(short) * nsems ); break; } case VKI_IPC_INFO|VKI_IPC_64: case VKI_SEM_INFO|VKI_IPC_64: { Addr buf = deref_Addr( tid, (Addr)&arg->__buf, "semctl(arg)" ); POST_MEM_WRITE( buf, sizeof(struct vki_seminfo) ); break; } case VKI_IPC_STAT|VKI_IPC_64: case VKI_SEM_STAT|VKI_IPC_64: { Addr buf = deref_Addr( tid, (Addr)&arg->buf, "semctl(arg)" ); POST_MEM_WRITE( buf, sizeof(struct vki_semid64_ds) ); break; } case VKI_GETALL|VKI_IPC_64: { Addr array = deref_Addr( tid, (Addr)&arg->array, "semctl(arg)" ); UInt nsems = get_sem_count( ARG2 ); POST_MEM_WRITE( array, sizeof(short) * nsems ); break; } default: break; } break; } case VKI_SEMTIMEDOP: case VKI_MSGSND: break; case VKI_MSGRCV: { struct vki_msgbuf *msgp; msgp = (struct vki_msgbuf *)deref_Addr( tid, (Addr) (&((struct vki_ipc_kludge *)ARG5)->msgp), "msgrcv(msgp)" ); if ( RES > 0 ) { POST_MEM_WRITE( (Addr)&msgp->mtype, sizeof(msgp->mtype) ); POST_MEM_WRITE( (Addr)msgp->mtext, RES ); } break; } case VKI_MSGGET: break; case VKI_MSGCTL: { switch (ARG3 /* cmd */) { case VKI_IPC_INFO: case VKI_MSG_INFO: POST_MEM_WRITE( ARG5, sizeof(struct vki_msginfo) ); break; case VKI_IPC_STAT: case VKI_MSG_STAT: POST_MEM_WRITE( ARG5, sizeof(struct vki_msqid_ds) ); break; case VKI_IPC_SET: break; case VKI_IPC_INFO|VKI_IPC_64: case VKI_MSG_INFO|VKI_IPC_64: POST_MEM_WRITE( ARG5, sizeof(struct vki_msginfo) ); break; case VKI_IPC_STAT|VKI_IPC_64: case VKI_MSG_STAT|VKI_IPC_64: POST_MEM_WRITE( ARG5, sizeof(struct vki_msqid64_ds) ); break; case VKI_IPC_SET|VKI_IPC_64: break; default: break; } break; } case VKI_SHMAT: { Int shmid = ARG2; Int shmflag = ARG3; Addr addr; /* force readability. before the syscall it is * indeed uninitialized, as can be seen in * glibc/sysdeps/unix/sysv/linux/shmat.c */ POST_MEM_WRITE( ARG4, sizeof( ULong ) ); addr = deref_Addr ( tid, ARG4, "shmat(addr)" ); if ( addr > 0 ) { UInt segmentSize = get_shm_size ( shmid ); if ( segmentSize > 0 ) { UInt prot = VKI_PROT_READ|VKI_PROT_WRITE; /* we don't distinguish whether it's read-only or * read-write -- it doesn't matter really. */ VG_TRACK( new_mem_mmap, addr, segmentSize, True, True, False ); if (!(shmflag & 010000)) /* = SHM_RDONLY */ prot &= ~VKI_PROT_WRITE; VG_(map_segment)(addr, segmentSize, prot, SF_SHARED|SF_SHM); } } break; } case VKI_SHMDT: { Segment *s = VG_(find_segment)(ARG5); if (s != NULL && (s->flags & SF_SHM) && VG_(seg_contains)(s, ARG5, 1)) { VG_TRACK( die_mem_munmap, s->addr, s->len ); VG_(unmap_range)(s->addr, s->len); } break; } case VKI_SHMGET: break; case VKI_SHMCTL: { switch (ARG3 /* cmd */) { case VKI_IPC_INFO: POST_MEM_WRITE( ARG5, sizeof(struct vki_shminfo) ); break; case VKI_SHM_INFO: POST_MEM_WRITE( ARG5, sizeof(struct vki_shm_info) ); break; case VKI_IPC_STAT: case VKI_SHM_STAT: POST_MEM_WRITE( ARG5, sizeof(struct vki_shmid_ds) ); break; case VKI_IPC_INFO|VKI_IPC_64: POST_MEM_WRITE( ARG5, sizeof(struct vki_shminfo64) ); break; case VKI_SHM_INFO|VKI_IPC_64: POST_MEM_WRITE( ARG5, sizeof(struct vki_shm_info) ); break; case VKI_IPC_STAT|VKI_IPC_64: case VKI_SHM_STAT|VKI_IPC_64: POST_MEM_WRITE( ARG5, sizeof(struct vki_shmid64_ds) ); break; default: break; } break; } default: VG_(message)(Vg_DebugMsg, "FATAL: unhandled syscall(ipc) %d", ARG1 ); VG_(core_panic)("... bye!\n"); break; /*NOTREACHED*/ } } PRE(sys_sigaction, Special) { PRINT("sys_sigaction ( %d, %p, %p )", ARG1,ARG2,ARG3); PRE_REG_READ3(int, "sigaction", int, signum, const struct old_sigaction *, act, struct old_sigaction *, oldact) if (ARG2 != 0) PRE_MEM_READ( "sigaction(act)", ARG2, sizeof(struct vki_old_sigaction)); if (ARG3 != 0) PRE_MEM_WRITE( "sigaction(oldact)", ARG3, sizeof(struct vki_old_sigaction)); VG_(do_sys_sigaction)(tid); } POST(sys_sigaction) { if (RES == 0 && ARG3 != 0) POST_MEM_WRITE( ARG3, sizeof(struct vki_old_sigaction)); } #undef PRE #undef POST /* --------------------------------------------------------------------- The x86/Linux syscall table ------------------------------------------------------------------ */ // Macros for adding x86/Linux-specific wrappers to the syscall table. #define PLAX_(const, name) SYS_WRAPPER_ENTRY_X_(x86_linux, const, name) #define PLAXY(const, name) SYS_WRAPPER_ENTRY_XY(x86_linux, const, name) // This table maps from __NR_xxx syscall numbers (from // linux/include/asm-i386/unistd.h) to the appropriate PRE/POST sys_foo() // wrappers on x86 (as per sys_call_table in linux/arch/i386/kernel/entry.S). // // For those syscalls not handled by Valgrind, the annotation indicate its // arch/OS combination, eg. */* (generic), */Linux (Linux only), ?/? // (unknown). const struct SyscallTableEntry VGA_(syscall_table)[] = { // (restart_syscall) // 0 GENX_(__NR_exit, sys_exit), // 1 GENXY(__NR_fork, sys_fork), // 2 GENXY(__NR_read, sys_read), // 3 GENX_(__NR_write, sys_write), // 4 GENXY(__NR_open, sys_open), // 5 GENXY(__NR_close, sys_close), // 6 GENXY(__NR_waitpid, sys_waitpid), // 7 GENXY(__NR_creat, sys_creat), // 8 GENX_(__NR_link, sys_link), // 9 GENX_(__NR_unlink, sys_unlink), // 10 GENX_(__NR_execve, sys_execve), // 11 GENX_(__NR_chdir, sys_chdir), // 12 GENXY(__NR_time, sys_time), // 13 GENX_(__NR_mknod, sys_mknod), // 14 GENX_(__NR_chmod, sys_chmod), // 15 // (__NR_lchown, sys_lchown16), // 16 ## P GENX_(__NR_break, sys_ni_syscall), // 17 // (__NR_oldstat, sys_stat), // 18 (obsolete) GENX_(__NR_lseek, sys_lseek), // 19 GENX_(__NR_getpid, sys_getpid), // 20 LINX_(__NR_mount, sys_mount), // 21 LINX_(__NR_umount, sys_oldumount), // 22 GENX_(__NR_setuid, sys_setuid16), // 23 ## P GENX_(__NR_getuid, sys_getuid16), // 24 ## P // (__NR_stime, sys_stime), // 25 * (SVr4,SVID,X/OPEN) PLAXY(__NR_ptrace, sys_ptrace), // 26 GENX_(__NR_alarm, sys_alarm), // 27 // (__NR_oldfstat, sys_fstat), // 28 * L -- obsolete GENX_(__NR_pause, sys_pause), // 29 GENX_(__NR_utime, sys_utime), // 30 GENX_(__NR_stty, sys_ni_syscall), // 31 GENX_(__NR_gtty, sys_ni_syscall), // 32 GENX_(__NR_access, sys_access), // 33 GENX_(__NR_nice, sys_nice), // 34 GENX_(__NR_ftime, sys_ni_syscall), // 35 GENX_(__NR_sync, sys_sync), // 36 GENXY(__NR_kill, sys_kill), // 37 GENX_(__NR_rename, sys_rename), // 38 GENX_(__NR_mkdir, sys_mkdir), // 39 GENX_(__NR_rmdir, sys_rmdir), // 40 GENXY(__NR_dup, sys_dup), // 41 GENXY(__NR_pipe, sys_pipe), // 42 GENXY(__NR_times, sys_times), // 43 GENX_(__NR_prof, sys_ni_syscall), // 44 GENX_(__NR_brk, sys_brk), // 45 GENX_(__NR_setgid, sys_setgid16), // 46 GENX_(__NR_getgid, sys_getgid16), // 47 // (__NR_signal, sys_signal), // 48 */* (ANSI C) GENX_(__NR_geteuid, sys_geteuid16), // 49 GENX_(__NR_getegid, sys_getegid16), // 50 GENX_(__NR_acct, sys_acct), // 51 LINX_(__NR_umount2, sys_umount), // 52 GENX_(__NR_lock, sys_ni_syscall), // 53 GENXY(__NR_ioctl, sys_ioctl), // 54 GENXY(__NR_fcntl, sys_fcntl), // 55 GENX_(__NR_mpx, sys_ni_syscall), // 56 GENXY(__NR_setpgid, sys_setpgid), // 57 GENX_(__NR_ulimit, sys_ni_syscall), // 58 // (__NR_oldolduname, sys_olduname), // 59 Linux -- obsolete GENX_(__NR_umask, sys_umask), // 60 GENX_(__NR_chroot, sys_chroot), // 61 // (__NR_ustat, sys_ustat) // 62 SVr4 -- deprecated GENXY(__NR_dup2, sys_dup2), // 63 GENX_(__NR_getppid, sys_getppid), // 64 GENX_(__NR_getpgrp, sys_getpgrp), // 65 GENX_(__NR_setsid, sys_setsid), // 66 PLAXY(__NR_sigaction, sys_sigaction), // 67 // (__NR_sgetmask, sys_sgetmask), // 68 */* (ANSI C) // (__NR_ssetmask, sys_ssetmask), // 69 */* (ANSI C) GENX_(__NR_setreuid, sys_setreuid16), // 70 GENX_(__NR_setregid, sys_setregid16), // 71 GENX_(__NR_sigsuspend, sys_sigsuspend), // 72 GENXY(__NR_sigpending, sys_sigpending), // 73 // (__NR_sethostname, sys_sethostname), // 74 */* GENX_(__NR_setrlimit, sys_setrlimit), // 75 GENXY(__NR_getrlimit, sys_old_getrlimit), // 76 GENXY(__NR_getrusage, sys_getrusage), // 77 GENXY(__NR_gettimeofday, sys_gettimeofday), // 78 GENX_(__NR_settimeofday, sys_settimeofday), // 79 GENXY(__NR_getgroups, sys_getgroups16), // 80 GENX_(__NR_setgroups, sys_setgroups16), // 81 PLAX_(__NR_select, old_select), // 82 GENX_(__NR_symlink, sys_symlink), // 83 // (__NR_oldlstat, sys_lstat), // 84 -- obsolete GENX_(__NR_readlink, sys_readlink), // 85 // (__NR_uselib, sys_uselib), // 86 */Linux // (__NR_swapon, sys_swapon), // 87 */Linux // (__NR_reboot, sys_reboot), // 88 */Linux // (__NR_readdir, old_readdir), // 89 -- superseded GENX_(__NR_mmap, old_mmap), // 90 GENXY(__NR_munmap, sys_munmap), // 91 GENX_(__NR_truncate, sys_truncate), // 92 GENX_(__NR_ftruncate, sys_ftruncate), // 93 GENX_(__NR_fchmod, sys_fchmod), // 94 GENX_(__NR_fchown, sys_fchown16), // 95 GENX_(__NR_getpriority, sys_getpriority), // 96 GENX_(__NR_setpriority, sys_setpriority), // 97 GENX_(__NR_profil, sys_ni_syscall), // 98 GENXY(__NR_statfs, sys_statfs), // 99 GENXY(__NR_fstatfs, sys_fstatfs), // 100 LINX_(__NR_ioperm, sys_ioperm), // 101 GENXY(__NR_socketcall, sys_socketcall), // 102 LINXY(__NR_syslog, sys_syslog), // 103 GENXY(__NR_setitimer, sys_setitimer), // 104 GENXY(__NR_getitimer, sys_getitimer), // 105 GENXY(__NR_stat, sys_newstat), // 106 GENXY(__NR_lstat, sys_newlstat), // 107 GENXY(__NR_fstat, sys_newfstat), // 108 // (__NR_olduname, sys_uname), // 109 -- obsolete GENX_(__NR_iopl, sys_iopl), // 110 LINX_(__NR_vhangup, sys_vhangup), // 111 GENX_(__NR_idle, sys_ni_syscall), // 112 // (__NR_vm86old, sys_vm86old), // 113 x86/Linux-only GENXY(__NR_wait4, sys_wait4), // 114 // (__NR_swapoff, sys_swapoff), // 115 */Linux LINXY(__NR_sysinfo, sys_sysinfo), // 116 PLAXY(__NR_ipc, sys_ipc), // 117 GENX_(__NR_fsync, sys_fsync), // 118 // (__NR_sigreturn, sys_sigreturn), // 119 ?/Linux PLAX_(__NR_clone, sys_clone), // 120 // (__NR_setdomainname, sys_setdomainname), // 121 */*(?) GENXY(__NR_uname, sys_newuname), // 122 PLAX_(__NR_modify_ldt, sys_modify_ldt), // 123 LINXY(__NR_adjtimex, sys_adjtimex), // 124 GENXY(__NR_mprotect, sys_mprotect), // 125 GENXY(__NR_sigprocmask, sys_sigprocmask), // 126 // Nb: create_module() was removed 2.4-->2.6 GENX_(__NR_create_module, sys_ni_syscall), // 127 GENX_(__NR_init_module, sys_init_module), // 128 // (__NR_delete_module, sys_delete_module), // 129 (*/Linux)? // Nb: get_kernel_syms() was removed 2.4-->2.6 GENX_(__NR_get_kernel_syms, sys_ni_syscall), // 130 GENX_(__NR_quotactl, sys_quotactl), // 131 GENX_(__NR_getpgid, sys_getpgid), // 132 GENX_(__NR_fchdir, sys_fchdir), // 133 // (__NR_bdflush, sys_bdflush), // 134 */Linux // (__NR_sysfs, sys_sysfs), // 135 SVr4 LINX_(__NR_personality, sys_personality), // 136 GENX_(__NR_afs_syscall, sys_ni_syscall), // 137 LINX_(__NR_setfsuid, sys_setfsuid16), // 138 LINX_(__NR_setfsgid, sys_setfsgid16), // 139 LINXY(__NR__llseek, sys_llseek), // 140 GENXY(__NR_getdents, sys_getdents), // 141 GENX_(__NR__newselect, sys_select), // 142 GENX_(__NR_flock, sys_flock), // 143 GENX_(__NR_msync, sys_msync), // 144 GENXY(__NR_readv, sys_readv), // 145 GENX_(__NR_writev, sys_writev), // 146 GENX_(__NR_getsid, sys_getsid), // 147 GENX_(__NR_fdatasync, sys_fdatasync), // 148 LINXY(__NR__sysctl, sys_sysctl), // 149 GENX_(__NR_mlock, sys_mlock), // 150 GENX_(__NR_munlock, sys_munlock), // 151 GENX_(__NR_mlockall, sys_mlockall), // 152 GENX_(__NR_munlockall, sys_munlockall), // 153 GENXY(__NR_sched_setparam, sys_sched_setparam), // 154 GENXY(__NR_sched_getparam, sys_sched_getparam), // 155 GENX_(__NR_sched_setscheduler, sys_sched_setscheduler), // 156 GENX_(__NR_sched_getscheduler, sys_sched_getscheduler), // 157 GENX_(__NR_sched_yield, sys_sched_yield), // 158 GENX_(__NR_sched_get_priority_max, sys_sched_get_priority_max),// 159 GENX_(__NR_sched_get_priority_min, sys_sched_get_priority_min),// 160 // (__NR_sched_rr_get_interval, sys_sched_rr_get_interval), // 161 */* GENXY(__NR_nanosleep, sys_nanosleep), // 162 GENX_(__NR_mremap, sys_mremap), // 163 LINX_(__NR_setresuid, sys_setresuid16), // 164 LINXY(__NR_getresuid, sys_getresuid16), // 165 // (__NR_vm86, sys_vm86), // 166 x86/Linux-only GENX_(__NR_query_module, sys_ni_syscall), // 167 GENXY(__NR_poll, sys_poll), // 168 // (__NR_nfsservctl, sys_nfsservctl), // 169 */Linux LINX_(__NR_setresgid, sys_setresgid16), // 170 LINXY(__NR_getresgid, sys_getresgid16), // 171 LINX_(__NR_prctl, sys_prctl), // 172 // (__NR_rt_sigreturn, sys_rt_sigreturn), // 173 x86/Linux only? GENXY(__NR_rt_sigaction, sys_rt_sigaction), // 174 GENXY(__NR_rt_sigprocmask, sys_rt_sigprocmask), // 175 GENXY(__NR_rt_sigpending, sys_rt_sigpending), // 176 GENXY(__NR_rt_sigtimedwait, sys_rt_sigtimedwait),// 177 GENXY(__NR_rt_sigqueueinfo, sys_rt_sigqueueinfo),// 178 GENX_(__NR_rt_sigsuspend, sys_rt_sigsuspend), // 179 GENXY(__NR_pread64, sys_pread64), // 180 GENX_(__NR_pwrite64, sys_pwrite64), // 181 GENX_(__NR_chown, sys_chown16), // 182 GENXY(__NR_getcwd, sys_getcwd), // 183 GENXY(__NR_capget, sys_capget), // 184 GENX_(__NR_capset, sys_capset), // 185 GENXY(__NR_sigaltstack, sys_sigaltstack), // 186 LINXY(__NR_sendfile, sys_sendfile), // 187 GENXY(__NR_getpmsg, sys_getpmsg), // 188 GENX_(__NR_putpmsg, sys_putpmsg), // 189 // Nb: we convert vfork() to fork() in VG_(pre_syscall)(). // (__NR_vfork, sys_vfork), // 190 GENXY(__NR_ugetrlimit, sys_getrlimit), // 191 GENXY(__NR_mmap2, sys_mmap2), // 192 GENX_(__NR_truncate64, sys_truncate64), // 193 GENX_(__NR_ftruncate64, sys_ftruncate64), // 194 GENXY(__NR_stat64, sys_stat64), // 195 GENXY(__NR_lstat64, sys_lstat64), // 196 GENXY(__NR_fstat64, sys_fstat64), // 197 GENX_(__NR_lchown32, sys_lchown), // 198 GENX_(__NR_getuid32, sys_getuid), // 199 GENX_(__NR_getgid32, sys_getgid), // 200 GENX_(__NR_geteuid32, sys_geteuid), // 201 GENX_(__NR_getegid32, sys_getegid), // 202 GENX_(__NR_setreuid32, sys_setreuid), // 203 GENX_(__NR_setregid32, sys_setregid), // 204 GENXY(__NR_getgroups32, sys_getgroups), // 205 GENX_(__NR_setgroups32, sys_setgroups), // 206 GENX_(__NR_fchown32, sys_fchown), // 207 LINX_(__NR_setresuid32, sys_setresuid), // 208 LINXY(__NR_getresuid32, sys_getresuid), // 209 LINX_(__NR_setresgid32, sys_setresgid), // 210 LINXY(__NR_getresgid32, sys_getresgid), // 211 GENX_(__NR_chown32, sys_chown), // 212 GENX_(__NR_setuid32, sys_setuid), // 213 GENX_(__NR_setgid32, sys_setgid), // 214 LINX_(__NR_setfsuid32, sys_setfsuid), // 215 LINX_(__NR_setfsgid32, sys_setfsgid), // 216 // (__NR_pivot_root, sys_pivot_root), // 217 */Linux GENXY(__NR_mincore, sys_mincore), // 218 GENX_(__NR_madvise, sys_madvise), // 219 GENXY(__NR_getdents64, sys_getdents64), // 220 GENXY(__NR_fcntl64, sys_fcntl64), // 221 GENX_(222, sys_ni_syscall), // 222 GENX_(223, sys_ni_syscall), // 223 // (__NR_gettid, sys_gettid), // 224 */Linux // (__NR_readahead, sys_readahead), // 225 */(Linux?) GENX_(__NR_setxattr, sys_setxattr), // 226 GENX_(__NR_lsetxattr, sys_lsetxattr), // 227 GENX_(__NR_fsetxattr, sys_fsetxattr), // 228 GENXY(__NR_getxattr, sys_getxattr), // 229 GENXY(__NR_lgetxattr, sys_lgetxattr), // 230 GENXY(__NR_fgetxattr, sys_fgetxattr), // 231 GENXY(__NR_listxattr, sys_listxattr), // 232 GENXY(__NR_llistxattr, sys_llistxattr), // 233 GENXY(__NR_flistxattr, sys_flistxattr), // 234 GENX_(__NR_removexattr, sys_removexattr), // 235 GENX_(__NR_lremovexattr, sys_lremovexattr), // 236 GENX_(__NR_fremovexattr, sys_fremovexattr), // 237 // (__NR_tkill, sys_tkill), // 238 */Linux LINXY(__NR_sendfile64, sys_sendfile64), // 239 LINXY(__NR_futex, sys_futex), // 240 GENX_(__NR_sched_setaffinity, sys_sched_setaffinity), // 241 GENXY(__NR_sched_getaffinity, sys_sched_getaffinity), // 242 PLAX_(__NR_set_thread_area, sys_set_thread_area), // 243 PLAX_(__NR_get_thread_area, sys_get_thread_area), // 244 LINX_(__NR_io_setup, sys_io_setup), // 245 LINX_(__NR_io_destroy, sys_io_destroy), // 246 LINXY(__NR_io_getevents, sys_io_getevents), // 247 LINX_(__NR_io_submit, sys_io_submit), // 248 LINXY(__NR_io_cancel, sys_io_cancel), // 249 // (__NR_fadvise64, sys_fadvise64), // 250 */(Linux?) GENX_(251, sys_ni_syscall), // 251 GENX_(__NR_exit_group, sys_exit_group), // 252 GENXY(__NR_lookup_dcookie, sys_lookup_dcookie), // 253 LINXY(__NR_epoll_create, sys_epoll_create), // 254 LINX_(__NR_epoll_ctl, sys_epoll_ctl), // 255 LINXY(__NR_epoll_wait, sys_epoll_wait), // 256 // (__NR_remap_file_pages, sys_remap_file_pages), // 257 */Linux GENX_(__NR_set_tid_address, sys_set_tid_address), // 258 GENXY(__NR_timer_create, sys_timer_create), // 259 GENXY(__NR_timer_settime, sys_timer_settime), // (timer_create+1) GENXY(__NR_timer_gettime, sys_timer_gettime), // (timer_create+2) GENX_(__NR_timer_getoverrun, sys_timer_getoverrun),//(timer_create+3) GENX_(__NR_timer_delete, sys_timer_delete), // (timer_create+4) GENX_(__NR_clock_settime, sys_clock_settime), // (timer_create+5) GENXY(__NR_clock_gettime, sys_clock_gettime), // (timer_create+6) GENXY(__NR_clock_getres, sys_clock_getres), // (timer_create+7) // (__NR_clock_nanosleep, sys_clock_nanosleep),// (timer_create+8) */* GENXY(__NR_statfs64, sys_statfs64), // 268 GENXY(__NR_fstatfs64, sys_fstatfs64), // 269 // (__NR_tgkill, sys_tgkill), // 270 */Linux GENX_(__NR_utimes, sys_utimes), // 271 // (__NR_fadvise64_64, sys_fadvise64_64), // 272 */(Linux?) GENX_(__NR_vserver, sys_ni_syscall), // 273 // (__NR_mbind, sys_mbind), // 274 ?/? // (__NR_get_mempolicy, sys_get_mempolicy), // 275 ?/? // (__NR_set_mempolicy, sys_set_mempolicy), // 276 ?/? GENXY(__NR_mq_open, sys_mq_open), // 277 GENX_(__NR_mq_unlink, sys_mq_unlink), // (mq_open+1) GENX_(__NR_mq_timedsend, sys_mq_timedsend), // (mq_open+2) GENXY(__NR_mq_timedreceive, sys_mq_timedreceive),// (mq_open+3) GENX_(__NR_mq_notify, sys_mq_notify), // (mq_open+4) GENXY(__NR_mq_getsetattr, sys_mq_getsetattr), // (mq_open+5) GENX_(__NR_sys_kexec_load, sys_ni_syscall), // 283 }; const UInt VGA_(syscall_table_size) = sizeof(VGA_(syscall_table)) / sizeof(VGA_(syscall_table)[0]); /*--------------------------------------------------------------------*/ /*--- end ---*/ /*--------------------------------------------------------------------*/