| |
| /*--------------------------------------------------------------------*/ |
| /*--- Update the byte permission maps following a system call. ---*/ |
| /*--- vg_syscall_mem.c ---*/ |
| /*--------------------------------------------------------------------*/ |
| |
| /* |
| This file is part of Valgrind, an x86 protected-mode emulator |
| designed for debugging and profiling binaries on x86-Unixes. |
| |
| Copyright (C) 2000-2002 Julian Seward |
| jseward@acm.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 LICENSE. |
| */ |
| |
| #include "vg_include.h" |
| |
| /* vg_unsafe.h should NOT be included into any file except this |
| one. */ |
| #include "vg_unsafe.h" |
| |
| |
| /* All system calls are channelled through vg_wrap_syscall. It does |
| three things: |
| |
| * optionally, checks the permissions for the args to the call |
| |
| * perform the syscall, usually by passing it along to the kernel |
| unmodified. However, because we simulate signals ourselves, |
| signal-related syscalls are routed to vg_signal.c, and are not |
| delivered to the kernel. |
| |
| * Update the permission maps following the syscall. |
| |
| A magical piece of assembly code, vg_do_syscall(), in vg_syscall.S |
| does the tricky bit of passing a syscall to the kernel, whilst |
| having the simulator retain control. |
| */ |
| |
| static void make_noaccess ( Addr a, UInt len ) |
| { |
| if (VG_(clo_instrument)) |
| VGM_(make_noaccess) ( a, len ); |
| } |
| |
| static void make_writable ( Addr a, UInt len ) |
| { |
| if (VG_(clo_instrument)) |
| VGM_(make_writable) ( a, len ); |
| } |
| |
| static void make_readable ( Addr a, UInt len ) |
| { |
| if (VG_(clo_instrument)) |
| VGM_(make_readable) ( a, len ); |
| } |
| |
| static void make_readwritable ( Addr a, UInt len ) |
| { |
| if (VG_(clo_instrument)) |
| VGM_(make_readwritable) ( a, len ); |
| } |
| |
| static |
| void must_be_writable ( ThreadState* tst, |
| Char* syscall_name, UInt base, UInt size ) |
| { |
| Bool ok; |
| Addr bad_addr; |
| /* VG_(message)(Vg_DebugMsg,"must be writable: %x .. %x", |
| base,base+size-1); */ |
| if (!VG_(clo_instrument)) |
| return; |
| ok = VGM_(check_writable) ( base, size, &bad_addr ); |
| if (!ok) |
| VG_(record_param_err) ( tst, bad_addr, True, syscall_name ); |
| } |
| |
| static |
| void must_be_readable ( ThreadState* tst, |
| Char* syscall_name, UInt base, UInt size ) |
| { |
| Bool ok; |
| Addr bad_addr; |
| /* VG_(message)(Vg_DebugMsg,"must be readable: %x .. %x", |
| base,base+size-1); */ |
| if (!VG_(clo_instrument)) |
| return; |
| ok = VGM_(check_readable) ( base, size, &bad_addr ); |
| if (!ok) |
| VG_(record_param_err) ( tst, bad_addr, False, syscall_name ); |
| } |
| |
| static |
| void must_be_readable_asciiz ( ThreadState* tst, |
| Char* syscall_name, UInt str ) |
| { |
| Bool ok = True; |
| Addr bad_addr; |
| /* VG_(message)(Vg_DebugMsg,"must be readable asciiz: 0x%x",str); */ |
| if (!VG_(clo_instrument)) |
| return; |
| ok = VGM_(check_readable_asciiz) ( (Addr)str, &bad_addr ); |
| if (!ok) |
| VG_(record_param_err) ( tst, bad_addr, False, syscall_name ); |
| } |
| |
| |
| /* Set memory permissions, based on PROT_* values for mmap/mprotect, |
| into the permissions our scheme understands. Dunno if this is |
| really correct. */ |
| |
| static void approximate_mmap_permissions ( Addr a, UInt len, UInt prot ) |
| { |
| /* PROT_READ and PROT_WRITE --> readable |
| PROT_READ only --> readable |
| PROT_WRITE only --> writable |
| NEITHER --> noaccess |
| */ |
| if (prot & PROT_READ) |
| make_readable(a,len); |
| else |
| if (prot & PROT_WRITE) |
| make_writable(a,len); |
| else |
| make_noaccess(a,len); |
| } |
| |
| |
| /* Dereference a pointer, but only after checking that it's |
| safe to do so. If not, return the default. |
| */ |
| static |
| UInt safe_dereference ( Addr aa, UInt defawlt ) |
| { |
| if (!VG_(clo_instrument)) |
| return * (UInt*)aa; |
| if (VGM_(check_readable)(aa,4,NULL)) |
| return * (UInt*)aa; |
| else |
| return defawlt; |
| } |
| |
| |
| /* Is this a Linux kernel error return value? */ |
| /* From: |
| http://sources.redhat.com/cgi-bin/cvsweb.cgi/libc/sysdeps/unix/sysv/ |
| linux/i386/sysdep.h? |
| rev=1.28&content-type=text/x-cvsweb-markup&cvsroot=glibc |
| |
| QUOTE: |
| |
| Linux uses a negative return value to indicate syscall errors, |
| unlike most Unices, which use the condition codes' carry flag. |
| |
| Since version 2.1 the return value of a system call might be |
| negative even if the call succeeded. E.g., the `lseek' system call |
| might return a large offset. Therefore we must not anymore test |
| for < 0, but test for a real error by making sure the value in %eax |
| is a real error number. Linus said he will make sure the no syscall |
| returns a value in -1 .. -4095 as a valid result so we can savely |
| test with -4095. |
| |
| END QUOTE |
| */ |
| Bool VG_(is_kerror) ( Int res ) |
| { |
| if (res >= -4095 && res <= -1) |
| return True; |
| else |
| return False; |
| } |
| |
| static |
| UInt get_shm_size ( Int shmid ) |
| { |
| struct shmid_ds buf; |
| long __res; |
| __asm__ volatile ( "int $0x80" |
| : "=a" (__res) |
| : "0" (__NR_ipc), |
| "b" ((long)(24) /*IPCOP_shmctl*/), |
| "c" ((long)(shmid)), |
| "d" ((long)(IPC_STAT)), |
| "S" ((long)(0)), |
| "D" ((long)(&buf)) ); |
| if ( VG_(is_kerror) ( __res ) ) |
| return 0; |
| |
| return buf.shm_segsz; |
| } |
| |
| static |
| Char *strdupcat ( const Char *s1, const Char *s2, ArenaId aid ) |
| { |
| UInt len = VG_(strlen) ( s1 ) + VG_(strlen) ( s2 ) + 1; |
| Char *result = VG_(malloc) ( aid, len ); |
| VG_(strcpy) ( result, s1 ); |
| VG_(strcat) ( result, s2 ); |
| return result; |
| } |
| |
| static |
| void must_be_readable_sendmsg ( ThreadState* tst, |
| Char *msg, UInt base, UInt size ) |
| { |
| Char *outmsg = strdupcat ( "socketcall.sendmsg", msg, VG_AR_TRANSIENT ); |
| must_be_readable ( tst, outmsg, base, size ); |
| VG_(free) ( VG_AR_TRANSIENT, outmsg ); |
| } |
| |
| static |
| void must_be_writable_recvmsg ( ThreadState* tst, |
| Char *msg, UInt base, UInt size ) |
| { |
| Char *outmsg = strdupcat ( "socketcall.recvmsg", msg, VG_AR_TRANSIENT ); |
| must_be_writable ( tst, outmsg, base, size ); |
| VG_(free) ( VG_AR_TRANSIENT, outmsg ); |
| } |
| |
| static |
| void make_readable_recvmsg ( ThreadState* tst, |
| Char *fieldName, UInt base, UInt size ) |
| { |
| make_readable( base, size ); |
| } |
| |
| static |
| void msghdr_foreachfield ( |
| ThreadState* tst, |
| struct msghdr *msg, |
| void (*foreach_func)( ThreadState*, Char *, UInt, UInt ) |
| ) |
| { |
| if ( !msg ) |
| return; |
| |
| foreach_func ( tst, "(msg)", (Addr)msg, sizeof( struct msghdr ) ); |
| |
| if ( msg->msg_name ) |
| foreach_func ( tst, |
| "(msg.msg_name)", |
| (Addr)msg->msg_name, msg->msg_namelen ); |
| |
| if ( msg->msg_iov ) { |
| struct iovec *iov = msg->msg_iov; |
| UInt i; |
| |
| foreach_func ( tst, |
| "(msg.msg_iov)", |
| (Addr)iov, msg->msg_iovlen * sizeof( struct iovec ) ); |
| |
| for ( i = 0; i < msg->msg_iovlen; ++i, ++iov ) |
| foreach_func ( tst, |
| "(msg.msg_iov[i]", |
| (Addr)iov->iov_base, iov->iov_len ); |
| } |
| |
| if ( msg->msg_control ) |
| foreach_func ( tst, |
| "(msg.msg_control)", |
| (Addr)msg->msg_control, msg->msg_controllen ); |
| } |
| |
| |
| /* Records the current end of the data segment so we can make sense of |
| calls to brk(). Initial value set by hdm_init_memory_audit(). */ |
| Addr VGM_(curr_dataseg_end); |
| |
| |
| |
| /* The Main Entertainment ... */ |
| |
| void VG_(perform_assumed_nonblocking_syscall) ( ThreadId tid ) |
| { |
| Bool sane_before_call = True; |
| Bool sane_after_call = True; |
| ThreadState* tst = VG_(get_thread_state)( tid ); |
| UInt syscallno = tst->m_eax; |
| UInt arg1 = tst->m_ebx; |
| UInt arg2 = tst->m_ecx; |
| UInt arg3 = tst->m_edx; |
| UInt arg4 = tst->m_esi; |
| UInt arg5 = tst->m_edi; |
| |
| /* Do not make this unsigned! */ |
| Int res; |
| |
| VGP_PUSHCC(VgpSyscall); |
| |
| /* Since buggy syscall wrappers sometimes break this, we may as well |
| check ourselves. */ |
| if (! VG_(first_and_last_secondaries_look_plausible)) |
| sane_before_call = False; |
| |
| /* the syscall no is in %eax. For syscalls with <= 5 args, |
| args 1 .. 5 to the syscall are in %ebx %ecx %edx %esi %edi. |
| For calls with > 5 args, %ebx points to a lump of memory |
| containing the args. |
| |
| The result is returned in %eax. If this value >= 0, the call |
| succeeded, and this is the return value. If < 0, it failed, and |
| the negation of this value is errno. To be more specific, |
| if res is in the range -EMEDIUMTYPE (-124) .. -EPERM (-1) |
| (kernel 2.4.9 sources, include/asm-i386/errno.h) |
| then it indicates an error. Otherwise it doesn't. |
| |
| Dirk Mueller (mueller@kde.org) says that values -4095 .. -1 |
| (inclusive?) indicate error returns. Not sure where the -4095 |
| comes from. |
| */ |
| |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("SYSCALL[%d,%d](%3d): ", |
| VG_(getpid)(), tid, syscallno); |
| |
| switch (syscallno) { |
| |
| case __NR_sigaltstack: |
| VG_(unimplemented) |
| ("client signals on alternative stack (SA_ONSTACK)"); |
| break; |
| |
| case __NR_clone: |
| VG_(unimplemented) |
| ("clone(): not supported by Valgrind.\n " |
| "We do now 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."); |
| break; |
| |
| # if defined(__NR_modify_ldt) |
| case __NR_modify_ldt: |
| VG_(unimplemented) |
| ("modify_ldt(): I (JRS) haven't investigated this yet; sorry."); |
| break; |
| # endif |
| |
| /* !!!!!!!!!! New, untested syscalls !!!!!!!!!!!!!!!!!!!!! */ |
| |
| # if defined(__NR_madvise) |
| case __NR_madvise: /* syscall 219 */ |
| /* int madvise(void *start, size_t length, int advice ); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("madvise ( %p, %d, %d )\n", arg1,arg2,arg3); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| # endif |
| |
| # if defined(__NR_mremap) |
| /* Is this really right? Perhaps it should copy the permissions |
| from the old area into the new. Unclear from the Linux man |
| pages what this really does. Also, the flags don't look like |
| they mean the same as the standard mmap flags, so that's |
| probably wrong too. */ |
| case __NR_mremap: /* syscall 163 */ |
| /* void* mremap(void * old_address, size_t old_size, |
| size_t new_size, unsigned long flags); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("mremap ( %p, %d, %d, 0x%x )\n", |
| arg1, arg2, arg3, arg4); |
| must_be_writable ( tst, "mremap(old_address)", arg1, arg2 ); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res)) { |
| /* Copied from munmap() wrapper. */ |
| Addr start = arg1; |
| Addr length = arg2; |
| while ((start % VKI_BYTES_PER_PAGE) > 0) { start--; length++; } |
| while (((start+length) % VKI_BYTES_PER_PAGE) > 0) { length++; } |
| make_noaccess( start, length ); |
| VG_(symtab_notify_munmap) ( start, length ); |
| approximate_mmap_permissions( (Addr)res, arg3, arg4 ); |
| } |
| break; |
| # endif |
| |
| case __NR_nice: /* syscall 34 */ |
| /* int nice(int inc); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("nice ( %d )\n", arg1); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| /* !!!!!!!!!! New, untested syscalls, 14 Mar 02 !!!!!!!!!! */ |
| |
| # if defined(__NR_setresgid32) |
| case __NR_setresgid32: /* syscall 210 */ |
| /* int setresgid(gid_t rgid, gid_t egid, gid_t sgid); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("setresgid32 ( %d, %d, %d )\n", arg1, arg2, arg3); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| # endif |
| |
| # if defined(__NR_setfsuid32) |
| case __NR_setfsuid32: /* syscall 215 */ |
| /* int setfsuid(uid_t fsuid); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("setfsuid ( %d )\n", arg1); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| # endif |
| |
| # if defined(__NR__sysctl) |
| case __NR__sysctl: |
| /* int _sysctl(struct __sysctl_args *args); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("_sysctl ( %p )\n", arg1 ); |
| must_be_writable ( tst, "_sysctl(args)", arg1, |
| sizeof(struct __sysctl_args) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res)) |
| make_readable ( arg1, sizeof(struct __sysctl_args) ); |
| break; |
| # endif |
| |
| # if defined(__NR_sched_getscheduler) |
| case __NR_sched_getscheduler: |
| /* int sched_getscheduler(pid_t pid); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("sched_getscheduler ( %d )\n", arg1); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| # endif |
| |
| # if defined(__NR_sched_setscheduler) |
| case __NR_sched_setscheduler: |
| /* int sched_setscheduler(pid_t pid, int policy, |
| const struct sched_param *p); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("sched_setscheduler ( %d, %d, %p )\n",arg1,arg2,arg3); |
| if (arg3 != (UInt)NULL) |
| must_be_readable( tst, |
| "sched_setscheduler(struct sched_param *p)", |
| arg3, sizeof(struct sched_param)); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| # endif |
| |
| # if defined(__NR_mlockall) |
| case __NR_mlockall: |
| /* int mlockall(int flags); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("mlockall ( %x )\n", arg1); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| # endif |
| |
| # if defined(__NR_munlockall) |
| case __NR_munlockall: |
| /* int munlockall(void); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("munlockall ( )\n"); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| # endif |
| |
| #if defined(__NR_sched_get_priority_max) |
| case __NR_sched_get_priority_max: |
| /* int sched_get_priority_max(int policy); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("sched_get_priority_max ( %d )\n", arg1); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| # endif |
| |
| # if defined(__NR_setfsgid) |
| case __NR_setfsgid: /* syscall 139 */ |
| /* int setfsgid(gid_t gid); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("setfsgid ( %d )\n", arg1); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| # endif |
| |
| # if defined(__NR_setregid) |
| case __NR_setregid: /* syscall 71 */ |
| /* int setregid(gid_t rgid, gid_t egid); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("setregid ( %d, %d )\n", arg1, arg2); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| # endif |
| |
| # if defined(__NR_setresuid) |
| case __NR_setresuid: /* syscall 164 */ |
| /* int setresuid(uid_t ruid, uid_t euid, uid_t suid); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("setresuid ( %d, %d, %d )\n", arg1, arg2, arg3); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| # endif |
| |
| # if defined(__NR_setfsuid) |
| case __NR_setfsuid: /* syscall 138 */ |
| /* int setfsuid(uid_t uid); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("setfsuid ( %d )\n", arg1); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| # endif |
| |
| /* !!!!!!!!!! New, untested syscalls, 8 Mar 02 !!!!!!!!!!! */ |
| |
| # if defined(__NR_sendfile) |
| case __NR_sendfile: /* syscall 187 */ |
| /* ssize_t sendfile(int out_fd, int in_fd, off_t *offset, |
| size_t count) */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("sendfile ( %d, %d, %p, %d )\n",arg1,arg2,arg3,arg4); |
| must_be_writable( tst, "sendfile(offset)", arg3, sizeof(off_t) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res)) { |
| make_readable( arg3, sizeof( off_t ) ); |
| } |
| break; |
| # endif |
| |
| /* !!!!!!!!!! New, untested syscalls, 7 Mar 02 !!!!!!!!!!! */ |
| |
| # if defined(__NR_pwrite) |
| case __NR_pwrite: /* syscall 181 */ |
| /* ssize_t pwrite (int fd, const void *buf, size_t nbytes, |
| off_t offset); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("pwrite ( %d, %p, %d, %d )\n", arg1, arg2, arg3, arg4); |
| must_be_readable( tst, "pwrite(buf)", arg2, arg3 ); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| # endif |
| |
| /* !!!!!!!!!! New, untested syscalls, 6 Mar 02 !!!!!!!!!!! */ |
| |
| case __NR_sync: /* syscall 36 */ |
| /* int sync(); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("sync ( )\n"); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| case __NR_fstatfs: /* syscall 100 */ |
| /* int fstatfs(int fd, struct statfs *buf); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("fstatfs ( %d, %p )\n",arg1,arg2); |
| must_be_writable( tst, "stat(buf)", arg2, sizeof(struct statfs) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res)) |
| make_readable( arg2, sizeof(struct statfs) ); |
| break; |
| |
| /* !!!!!!!!!! New, untested syscalls, 4 Mar 02 !!!!!!!!!!! */ |
| |
| case __NR_pause: /* syscall 29 */ |
| /* int pause(void); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("pause ( )\n"); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| case __NR_getsid: /* syscall 147 */ |
| /* pid_t getsid(pid_t pid); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("getsid ( %d )\n", arg1); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| # if defined(__NR_pread) |
| case __NR_pread: /* syscall 180 */ |
| /* ssize_t pread(int fd, void *buf, size_t count, off_t offset); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("pread ( %d, %p, %d, %d ) ...\n",arg1,arg2,arg3,arg4); |
| must_be_writable( tst, "pread(buf)", arg2, arg3 ); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("SYSCALL[%d] pread ( %d, %p, %d, %d ) --> %d\n", |
| VG_(getpid)(), |
| arg1, arg2, arg3, arg4, res); |
| if (!VG_(is_kerror)(res) && res > 0) { |
| make_readable( arg2, res ); |
| } |
| break; |
| # endif |
| |
| /* !!!!!!!!!! New, untested syscalls, 27 Feb 02 !!!!!!!!!! */ |
| |
| case __NR_mknod: /* syscall 14 */ |
| /* int mknod(const char *pathname, mode_t mode, dev_t dev); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("mknod ( %p, 0x%x, 0x%x )\n", arg1, arg2, arg3 ); |
| must_be_readable_asciiz( tst, "mknod(pathname)", arg1 ); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| case __NR_flock: /* syscall 143 */ |
| /* int flock(int fd, int operation); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("flock ( %d, %d )\n", arg1, arg2 ); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| # if defined(__NR_rt_sigsuspend) |
| /* Viewed with great suspicion by me, but, hey, let's do it |
| anyway ... */ |
| case __NR_rt_sigsuspend: /* syscall 179 */ |
| /* int sigsuspend(const sigset_t *mask); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("sigsuspend ( %p )\n", arg1 ); |
| if (arg1 != (Addr)NULL) { |
| /* above NULL test is paranoia */ |
| must_be_readable( tst, "sigsuspend(mask)", arg1, |
| sizeof(vki_ksigset_t) ); |
| } |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| # endif |
| |
| case __NR_init_module: /* syscall 128 */ |
| /* int init_module(const char *name, struct module *image); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("init_module ( %p, %p )\n", arg1, arg2 ); |
| must_be_readable_asciiz( tst, "init_module(name)", arg1 ); |
| must_be_readable( tst, "init_module(image)", arg2, |
| sizeof(struct module) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| case __NR_ioperm: /* syscall 101 */ |
| /* int ioperm(unsigned long from, unsigned long num, int turn_on); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("ioperm ( %d, %d, %d )\n", arg1, arg2, arg3 ); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| case __NR_capget: /* syscall 184 */ |
| /* int capget(cap_user_header_t header, cap_user_data_t data); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("capget ( %p, %p )\n", arg1, arg2 ); |
| must_be_readable( tst, "capget(header)", arg1, |
| sizeof(vki_cap_user_header_t) ); |
| must_be_writable( tst, "capget(data)", arg2, |
| sizeof( vki_cap_user_data_t) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res) && arg2 != (Addr)NULL) |
| make_readable ( arg2, sizeof( vki_cap_user_data_t) ); |
| break; |
| |
| /* !!!!!!!!!!!!!!!!!!!!! mutant ones !!!!!!!!!!!!!!!!!!!!! */ |
| |
| case __NR_execve: |
| /* int execve (const char *filename, |
| char *const argv [], |
| char *const envp[]); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("execve ( %p(%s), %p, %p ) --- NOT CHECKED\n", |
| arg1, arg1, arg2, arg3); |
| /* Make any binding for LD_PRELOAD disappear, so that child |
| processes don't get traced into. */ |
| if (!VG_(clo_trace_children)) { |
| Int i; |
| Char** envp = (Char**)arg3; |
| for (i = 0; envp[i] != NULL; i++) { |
| if (VG_(strncmp)(envp[i], "LD_PRELOAD=", 11) == 0) { |
| VG_(mash_LD_PRELOAD_string)(&envp[i][11]); |
| } |
| } |
| } |
| KERNEL_DO_SYSCALL(tid,res); |
| /* Should we still be alive here? Don't think so. */ |
| /* Actually, above comment is wrong. execve can fail, just |
| like any other syscall -- typically the file to exec does |
| not exist. Hence: */ |
| vg_assert(VG_(is_kerror)(res)); |
| break; |
| |
| case __NR_exit: /* syscall 1 */ |
| /* void _exit(int status); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("exit ( %d )\n", arg1); |
| VG_(message)(Vg_UserMsg, |
| "Warning: client exiting by calling exit(%d). Bye!", |
| arg1); |
| |
| KERNEL_DO_SYSCALL(tid,res); |
| /* Definitely should not be alive here :) */ |
| break; |
| |
| /* !!!!!!!!!!!!!!!!!!!!! end !!!!!!!!!!!!!!!!!!!!! */ |
| |
| case __NR_access: /* syscall 33 */ |
| /* int access(const char *pathname, int mode); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("access ( %p, %d )\n", arg1,arg2); |
| must_be_readable_asciiz( tst, "access(pathname)", arg1 ); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| case __NR_alarm: /* syscall 27 */ |
| /* unsigned int alarm(unsigned int seconds); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("alarm ( %d )\n", arg1); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| case __NR_brk: /* syscall 45 */ |
| /* Haven't a clue if this is really right. */ |
| /* int brk(void *end_data_segment); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("brk ( %p ) --> ",arg1); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("0x%x\n", res); |
| |
| if (!VG_(is_kerror)(res)) { |
| if (arg1 == 0) { |
| /* Just asking where the current end is. (???) */ |
| VGM_(curr_dataseg_end) = res; |
| } else |
| if (arg1 < VGM_(curr_dataseg_end)) { |
| /* shrinking the data segment. */ |
| make_noaccess( (Addr)arg1, |
| VGM_(curr_dataseg_end)-arg1 ); |
| VGM_(curr_dataseg_end) = arg1; |
| } else |
| if (arg1 > VGM_(curr_dataseg_end) && res != 0) { |
| /* asked for more memory, and got it */ |
| /* |
| VG_(printf)("BRK: new area %x .. %x\n", |
| VGM_(curr_dataseg_end, arg1-1 ); |
| */ |
| make_writable ( (Addr)VGM_(curr_dataseg_end), |
| arg1-VGM_(curr_dataseg_end) ); |
| VGM_(curr_dataseg_end) = arg1; |
| } |
| } |
| break; |
| |
| case __NR_chdir: /* syscall 12 */ |
| /* int chdir(const char *path); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("chdir ( %p )\n", arg1); |
| must_be_readable_asciiz( tst, "chdir(path)", arg1 ); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| case __NR_chmod: /* syscall 15 */ |
| /* int chmod(const char *path, mode_t mode); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("chmod ( %p, %d )\n", arg1,arg2); |
| must_be_readable_asciiz( tst, "chmod(path)", arg1 ); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| # if defined(__NR_chown32) |
| case __NR_chown32: /* syscall 212 */ |
| # endif |
| # if defined(__NR_lchown32) |
| case __NR_lchown32: /* syscall 198 */ |
| # endif |
| case __NR_chown: /* syscall 16 */ |
| /* int chown(const char *path, uid_t owner, gid_t group); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("chown ( %p, 0x%x, 0x%x )\n", arg1,arg2,arg3); |
| must_be_readable_asciiz( tst, "chown(path)", arg1 ); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| case __NR_close: /* syscall 6 */ |
| /* int close(int fd); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("close ( %d )\n",arg1); |
| /* Detect and negate attempts by the client to close Valgrind's |
| logfile fd ... */ |
| if (arg1 == VG_(clo_logfile_fd)) { |
| VG_(message)(Vg_UserMsg, |
| "Warning: client attempted to close " |
| "Valgrind's logfile fd (%d).", |
| VG_(clo_logfile_fd)); |
| VG_(message)(Vg_UserMsg, |
| " Use --logfile-fd=<number> to select an " |
| "alternative logfile fd." ); |
| } else { |
| KERNEL_DO_SYSCALL(tid,res); |
| } |
| break; |
| |
| case __NR_dup: /* syscall 41 */ |
| /* int dup(int oldfd); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("dup ( %d ) --> ", arg1); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("%d\n", res); |
| break; |
| |
| case __NR_dup2: /* syscall 63 */ |
| /* int dup2(int oldfd, int newfd); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("dup2 ( %d, %d ) ...\n", arg1,arg2); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("SYSCALL[%d] dup2 ( %d, %d ) = %d\n", |
| VG_(getpid)(), |
| arg1, arg2, res); |
| break; |
| |
| case __NR_fcntl: /* syscall 55 */ |
| /* int fcntl(int fd, int cmd, int arg); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("fcntl ( %d, %d, %d )\n",arg1,arg2,arg3); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| case __NR_fchdir: /* syscall 133 */ |
| /* int fchdir(int fd); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("fchdir ( %d )\n", arg1); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| # if defined(__NR_fchown32) |
| case __NR_fchown32: /* syscall 207 */ |
| # endif |
| case __NR_fchown: /* syscall 95 */ |
| /* int fchown(int filedes, uid_t owner, gid_t group); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("fchown ( %d, %d, %d )\n", arg1,arg2,arg3); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| case __NR_fchmod: /* syscall 94 */ |
| /* int fchmod(int fildes, mode_t mode); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("fchmod ( %d, %d )\n", arg1,arg2); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| # if defined(__NR_fcntl64) |
| case __NR_fcntl64: /* syscall 221 */ |
| /* I don't know what the prototype for this is supposed to be. */ |
| /* ??? int fcntl(int fd, int cmd); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("fcntl64 (?!) ( %d, %d )\n", arg1,arg2); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| # endif |
| |
| case __NR_fstat: /* syscall 108 */ |
| /* int fstat(int filedes, struct stat *buf); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("fstat ( %d, %p )\n",arg1,arg2); |
| must_be_writable( tst, "fstat", arg2, sizeof(struct stat) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res)) |
| make_readable( arg2, sizeof(struct stat) ); |
| break; |
| |
| case __NR_vfork: /* syscall 190 */ |
| /* pid_t vfork(void); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("vfork ( ) ... becomes ... "); |
| /* KLUDGE: we prefer to do a fork rather than vfork. |
| vfork gives a SIGSEGV, and the stated semantics looks |
| pretty much impossible for us. */ |
| tst->m_eax = __NR_fork; |
| /* fall through ... */ |
| case __NR_fork: /* syscall 2 */ |
| /* pid_t fork(void); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("fork ()\n"); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| case __NR_fsync: /* syscall 118 */ |
| /* int fsync(int fd); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("fsync ( %d )\n", arg1); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| case __NR_ftruncate: /* syscall 93 */ |
| /* int ftruncate(int fd, size_t length); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("ftruncate ( %d, %d )\n", arg1,arg2); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| # if defined(__NR_ftruncate64) |
| case __NR_ftruncate64: /* syscall 194 */ |
| /* int ftruncate64(int fd, off64_t length); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("ftruncate64 ( %d, %lld )\n", |
| arg1,arg2|((long long) arg3 << 32)); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| # endif |
| |
| case __NR_getdents: /* syscall 141 */ |
| /* int getdents(unsigned int fd, struct dirent *dirp, |
| unsigned int count); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("getdents ( %d, %p, %d )\n",arg1,arg2,arg3); |
| must_be_writable( tst, "getdents(dirp)", arg2, arg3 ); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res) && res > 0) |
| make_readable( arg2, res ); |
| break; |
| |
| # if defined(__NR_getdents64) |
| case __NR_getdents64: /* syscall 220 */ |
| /* int getdents(unsigned int fd, struct dirent64 *dirp, |
| unsigned int count); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("getdents64 ( %d, %p, %d )\n",arg1,arg2,arg3); |
| must_be_writable( tst, "getdents64(dirp)", arg2, arg3 ); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res) && res > 0) |
| make_readable( arg2, res ); |
| break; |
| # endif |
| |
| # if defined(__NR_getgroups32) |
| case __NR_getgroups32: /* syscall 205 */ |
| # endif |
| case __NR_getgroups: /* syscall 80 */ |
| /* int getgroups(int size, gid_t list[]); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("getgroups ( %d, %p )\n", arg1, arg2); |
| if (arg1 > 0) |
| must_be_writable ( tst, "getgroups(list)", arg2, |
| arg1 * sizeof(gid_t) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (arg1 > 0 && !VG_(is_kerror)(res) && res > 0) |
| make_readable ( arg2, res * sizeof(gid_t) ); |
| break; |
| |
| case __NR_getcwd: /* syscall 183 */ |
| /* char *getcwd(char *buf, size_t size); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("getcwd ( %p, %d )\n",arg1,arg2); |
| must_be_writable( tst, "getcwd(buf)", arg1, arg2 ); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res) && res != (Addr)NULL) |
| make_readable ( arg1, arg2 ); |
| /* Not really right -- really we should have the asciiz |
| string starting at arg1 readable, or up to arg2 bytes, |
| whichever finishes first. */ |
| break; |
| |
| case __NR_geteuid: /* syscall 49 */ |
| /* uid_t geteuid(void); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("geteuid ( )\n"); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| # if defined(__NR_geteuid32) |
| case __NR_geteuid32: /* syscall 201 */ |
| /* ?? uid_t geteuid32(void); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("geteuid32(?) ( )\n"); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| # endif |
| |
| case __NR_getegid: /* syscall 50 */ |
| /* gid_t getegid(void); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("getegid ()\n"); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| # if defined(__NR_getegid32) |
| case __NR_getegid32: /* syscall 202 */ |
| /* gid_t getegid32(void); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("getegid32 ()\n"); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| # endif |
| |
| case __NR_getgid: /* syscall 47 */ |
| /* gid_t getgid(void); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("getgid ()\n"); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| # if defined(__NR_getgid32) |
| case __NR_getgid32: /* syscall 200 */ |
| /* gid_t getgid32(void); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("getgid32 ()\n"); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| # endif |
| |
| case __NR_getpid: /* syscall 20 */ |
| /* pid_t getpid(void); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("getpid ()\n"); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| case __NR_getpgid: /* syscall 132 */ |
| /* pid_t getpgid(pid_t pid); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("getpgid ( %d )\n", arg1); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| case __NR_getpgrp: /* syscall 65 */ |
| /* pid_t getpprp(void); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("getpgrp ()\n"); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| case __NR_getppid: /* syscall 64 */ |
| /* pid_t getppid(void); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("getppid ()\n"); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| case __NR_getresgid: /* syscall 171 */ |
| /* int getresgid(gid_t *rgid, gid_t *egid, gid_t *sgid); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("getresgid ( %p, %p, %p )\n", arg1,arg2,arg3); |
| must_be_writable ( tst, "getresgid(rgid)", arg1, sizeof(gid_t) ); |
| must_be_writable ( tst, "getresgid(egid)", arg2, sizeof(gid_t) ); |
| must_be_writable ( tst, "getresgid(sgid)", arg3, sizeof(gid_t) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res) && res == 0) { |
| make_readable ( arg1, sizeof(gid_t) ); |
| make_readable ( arg2, sizeof(gid_t) ); |
| make_readable ( arg3, sizeof(gid_t) ); |
| } |
| break; |
| |
| # if defined(__NR_getresgid32) |
| case __NR_getresgid32: /* syscall 211 */ |
| /* int getresgid(gid_t *rgid, gid_t *egid, gid_t *sgid); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("getresgid32 ( %p, %p, %p )\n", arg1,arg2,arg3); |
| must_be_writable ( tst, "getresgid32(rgid)", arg1, sizeof(gid_t) ); |
| must_be_writable ( tst, "getresgid32(egid)", arg2, sizeof(gid_t) ); |
| must_be_writable ( tst, "getresgid32(sgid)", arg3, sizeof(gid_t) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res) && res == 0) { |
| make_readable ( arg1, sizeof(gid_t) ); |
| make_readable ( arg2, sizeof(gid_t) ); |
| make_readable ( arg3, sizeof(gid_t) ); |
| } |
| break; |
| # endif |
| |
| case __NR_getresuid: /* syscall 165 */ |
| /* int getresuid(uid_t *ruid, uid_t *euid, uid_t *suid); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("getresuid ( %p, %p, %p )\n", arg1,arg2,arg3); |
| must_be_writable ( tst, "getresuid(ruid)", arg1, sizeof(uid_t) ); |
| must_be_writable ( tst, "getresuid(euid)", arg2, sizeof(uid_t) ); |
| must_be_writable ( tst, "getresuid(suid)", arg3, sizeof(uid_t) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res) && res == 0) { |
| make_readable ( arg1, sizeof(uid_t) ); |
| make_readable ( arg2, sizeof(uid_t) ); |
| make_readable ( arg3, sizeof(uid_t) ); |
| } |
| break; |
| |
| # if defined(__NR_getresuid32) |
| case __NR_getresuid32: /* syscall 209 */ |
| /* int getresuid(uid_t *ruid, uid_t *euid, uid_t *suid); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("getresuid32 ( %p, %p, %p )\n", arg1,arg2,arg3); |
| must_be_writable ( tst, "getresuid32(ruid)", arg1, sizeof(uid_t) ); |
| must_be_writable ( tst, "getresuid32(euid)", arg2, sizeof(uid_t) ); |
| must_be_writable ( tst, "getresuid32(suid)", arg3, sizeof(uid_t) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res) && res == 0) { |
| make_readable ( arg1, sizeof(uid_t) ); |
| make_readable ( arg2, sizeof(uid_t) ); |
| make_readable ( arg3, sizeof(uid_t) ); |
| } |
| break; |
| # endif |
| |
| # if defined(__NR_ugetrlimit) |
| case __NR_ugetrlimit: /* syscall 191 */ |
| # endif |
| case __NR_getrlimit: /* syscall 76 */ |
| /* int getrlimit (int resource, struct rlimit *rlim); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("getrlimit ( %d, %p )\n", arg1,arg2); |
| must_be_writable( tst, "getrlimit(rlim)", arg2, |
| sizeof(struct rlimit) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res) && res == 0) |
| make_readable( arg2, sizeof(struct rlimit) ); |
| break; |
| |
| case __NR_getrusage: /* syscall 77 */ |
| /* int getrusage (int who, struct rusage *usage); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("getrusage ( %d, %p )\n", arg1,arg2); |
| must_be_writable( tst, "getrusage(usage)", arg2, |
| sizeof(struct rusage) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res) && res == 0) |
| make_readable(arg2, sizeof(struct rusage) ); |
| break; |
| |
| case __NR_gettimeofday: /* syscall 78 */ |
| /* int gettimeofday(struct timeval *tv, struct timezone *tz); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("gettimeofday ( %p, %p )\n",arg1,arg2); |
| must_be_writable( tst, "gettimeofday(tv)", arg1, |
| sizeof(struct timeval) ); |
| if (arg2 != 0) |
| must_be_writable( tst, "gettimeofday(tz)", arg2, |
| sizeof(struct timezone) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res) && res == 0) { |
| make_readable( arg1, sizeof(struct timeval) ); |
| if (arg2 != 0) |
| make_readable( arg2, sizeof(struct timezone) ); |
| } |
| break; |
| |
| case __NR_getuid: /* syscall 24 */ |
| /* uid_t getuid(void); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("getuid ( )\n"); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| # if defined(__NR_getuid32) |
| case __NR_getuid32: /* syscall 199 */ |
| /* ???uid_t getuid32(void); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("getuid32 ( )\n"); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| # endif |
| |
| case __NR_ipc: /* syscall 117 */ |
| /* int ipc ( unsigned int call, int first, int second, |
| int third, void *ptr, long fifth); */ |
| { |
| UInt arg6 = tst->m_ebp; |
| |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("ipc ( %d, %d, %d, %d, %p, %d )\n", |
| arg1,arg2,arg3,arg4,arg5,arg6); |
| switch (arg1 /* call */) { |
| case 1: /* IPCOP_semop */ |
| must_be_readable ( tst, "semop(sops)", arg5, |
| arg3 * sizeof(struct sembuf) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| case 2: /* IPCOP_semget */ |
| case 3: /* IPCOP_semctl */ |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| case 11: /* IPCOP_msgsnd */ |
| { |
| struct msgbuf *msgp = (struct msgbuf *)arg5; |
| Int msgsz = arg3; |
| |
| must_be_readable ( tst, "msgsnd(msgp->mtype)", |
| (UInt)&msgp->mtype, sizeof(msgp->mtype) ); |
| must_be_readable ( tst, "msgsnd(msgp->mtext)", |
| (UInt)msgp->mtext, msgsz ); |
| |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| } |
| case 12: /* IPCOP_msgrcv */ |
| { |
| struct msgbuf *msgp = ((struct ipc_kludge *)arg5)->msgp; |
| Int msgsz = arg3; |
| |
| must_be_writable ( tst, "msgsnd(msgp->mtype)", |
| (UInt)&msgp->mtype, sizeof(msgp->mtype) ); |
| must_be_writable ( tst, "msgsnd(msgp->mtext)", |
| (UInt)msgp->mtext, msgsz ); |
| |
| KERNEL_DO_SYSCALL(tid,res); |
| |
| if ( !VG_(is_kerror)(res) && res > 0 ) { |
| make_readable ( (UInt)&msgp->mtype, sizeof(msgp->mtype) ); |
| make_readable ( (UInt)msgp->mtext, res ); |
| } |
| break; |
| } |
| case 13: /* IPCOP_msgget */ |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| case 14: /* IPCOP_msgctl */ |
| { |
| switch (arg3 /* cmd */) { |
| case IPC_STAT: |
| must_be_writable ( tst, "msgctl(buf)", arg5, |
| sizeof(struct msqid_ds) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| if ( !VG_(is_kerror)(res) && res > 0 ) { |
| make_readable ( arg5, sizeof(struct msqid_ds) ); |
| } |
| break; |
| case IPC_SET: |
| must_be_readable ( tst, "msgctl(buf)", arg5, |
| sizeof(struct msqid_ds) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| # if defined(IPC_64) |
| case IPC_STAT|IPC_64: |
| must_be_writable ( tst, "msgctl(buf)", arg5, |
| sizeof(struct msqid64_ds) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| if ( !VG_(is_kerror)(res) && res > 0 ) { |
| make_readable ( arg5, sizeof(struct msqid64_ds) ); |
| } |
| break; |
| # endif |
| # if defined(IPC_64) |
| case IPC_SET|IPC_64: |
| must_be_readable ( tst, "msgctl(buf)", arg5, |
| sizeof(struct msqid64_ds) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| # endif |
| default: |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| } |
| break; |
| } |
| case 21: /* IPCOP_shmat */ |
| { |
| Int shmid = arg2; |
| Int shmflag = arg3; |
| UInt addr; |
| |
| KERNEL_DO_SYSCALL(tid,res); |
| |
| if ( VG_(is_kerror) ( res ) ) |
| break; |
| |
| /* force readability. before the syscall it is |
| * indeed uninitialized, as can be seen in |
| * glibc/sysdeps/unix/sysv/linux/shmat.c */ |
| make_readable ( arg4, sizeof( ULong ) ); |
| |
| addr = safe_dereference ( arg4, 0 ); |
| if ( addr > 0 ) { |
| UInt segmentSize = get_shm_size ( shmid ); |
| if ( segmentSize > 0 ) { |
| if ( shmflag & SHM_RDONLY ) |
| make_readable ( addr, segmentSize ); |
| else |
| make_readwritable ( addr, segmentSize ); |
| } |
| } |
| break; |
| } |
| case 22: /* IPCOP_shmdt */ |
| KERNEL_DO_SYSCALL(tid,res); |
| /* ### FIXME: this should call make_noaccess on the |
| * area passed to shmdt. But there's no way to |
| * figure out the size of the shared memory segment |
| * just from the address... Maybe we want to keep a |
| * copy of the exiting mappings inside valgrind? */ |
| break; |
| case 23: /* IPCOP_shmget */ |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| case 24: /* IPCOP_shmctl */ |
| { |
| if ( arg3 > 0 ) { |
| must_be_readable ( tst, "shmctl(buf)", arg3, |
| sizeof( struct shmid_ds ) ); |
| |
| if ( arg2 == SHM_STAT ) |
| must_be_writable( tst, "shmctl(IPC_STAT,buf)", arg3, |
| sizeof( struct shmid_ds ) ); |
| } |
| |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| } |
| default: |
| VG_(message)(Vg_DebugMsg, |
| "FATAL: unhandled syscall(ipc) %d", |
| arg1 ); |
| VG_(panic)("... bye!\n"); |
| break; /*NOTREACHED*/ |
| } |
| } |
| break; |
| |
| case __NR_ioctl: /* syscall 54 */ |
| /* int ioctl(int d, int request, ...) |
| [The "third" argument is traditionally char *argp, |
| and will be so named for this discussion.] |
| */ |
| /* |
| VG_(message)( |
| Vg_DebugMsg, |
| "is an IOCTL, request = 0x%x, d = %d, argp = 0x%x", |
| arg2,arg1,arg3); |
| */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("ioctl ( %d, 0x%x, %p )\n",arg1,arg2,arg3); |
| switch (arg2 /* request */) { |
| case TCSETS: |
| case TCSETSW: |
| case TCSETSF: |
| must_be_readable( tst, "ioctl(TCSETSW)", arg3, |
| VKI_SIZEOF_STRUCT_TERMIOS ); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| case TCGETS: |
| must_be_writable( tst, "ioctl(TCGETS)", arg3, |
| VKI_SIZEOF_STRUCT_TERMIOS ); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res) && res == 0) |
| make_readable ( arg3, VKI_SIZEOF_STRUCT_TERMIOS ); |
| break; |
| case TCSETA: |
| must_be_readable( tst, "ioctl(TCSETA)", arg3, |
| VKI_SIZEOF_STRUCT_TERMIO ); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| case TCGETA: |
| must_be_writable( tst, "ioctl(TCGETA)", arg3, |
| VKI_SIZEOF_STRUCT_TERMIO ); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res) && res == 0) |
| make_readable ( arg3, VKI_SIZEOF_STRUCT_TERMIO ); |
| break; |
| case TCSBRK: |
| case TCSBRKP: |
| case TCFLSH: |
| /* These just take an int by value */ |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| case TIOCGWINSZ: |
| must_be_writable( tst, "ioctl(TIOCGWINSZ)", arg3, |
| sizeof(struct winsize) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res) && res == 0) |
| make_readable ( arg3, sizeof(struct winsize) ); |
| break; |
| case TIOCSWINSZ: |
| must_be_readable( tst, "ioctl(TIOCSWINSZ)", arg3, |
| sizeof(struct winsize) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| case TIOCGPGRP: |
| /* Get process group ID for foreground processing group. */ |
| must_be_writable( tst, "ioctl(TIOCGPGRP)", arg3, |
| sizeof(pid_t) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res) && res == 0) |
| make_readable ( arg3, sizeof(pid_t) ); |
| case TIOCGPTN: /* Get Pty Number (of pty-mux device) */ |
| must_be_writable(tst, "ioctl(TIOCGPTN)", arg3, sizeof(int) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res) && res == 0) |
| make_readable ( arg3, sizeof(int)); |
| break; |
| case TIOCSCTTY: |
| /* Just takes an int value. */ |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| case TIOCSPTLCK: /* Lock/unlock Pty */ |
| must_be_readable( tst, "ioctl(TIOCSPTLCK)", arg3, sizeof(int) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| case FIONBIO: |
| must_be_readable( tst, "ioctl(FIONBIO)", arg3, sizeof(int) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| case FIOASYNC: |
| must_be_readable( tst, "ioctl(FIOASYNC)", arg3, sizeof(int) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| case FIONREAD: |
| must_be_writable( tst, "ioctl(FIONREAD)", arg3, sizeof(int) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res) && res == 0) |
| make_readable( arg3, sizeof(int) ); |
| break; |
| |
| /* If you get compilation problems here, change the #if |
| 1 to #if 0 and get rid of <scsi/sg.h> in |
| vg_unsafe.h. */ |
| # if 1 |
| case SG_SET_COMMAND_Q: |
| must_be_readable( tst, "ioctl(SG_SET_COMMAND_Q)", |
| arg3, sizeof(int) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| # if defined(SG_IO) |
| case SG_IO: |
| must_be_writable( tst, "ioctl(SG_IO)", arg3, |
| sizeof(struct sg_io_hdr) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res) && res == 0) |
| make_readable (arg3, sizeof(struct sg_io_hdr)); |
| break; |
| # endif /* SG_IO */ |
| case SG_GET_SCSI_ID: |
| /* Note: sometimes sg_scsi_id is called sg_scsi_id_t */ |
| must_be_writable( tst, "ioctl(SG_GET_SCSI_ID)", arg3, |
| sizeof(struct sg_scsi_id) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res) && res == 0) |
| make_readable (arg3, sizeof(struct sg_scsi_id)); |
| break; |
| case SG_SET_RESERVED_SIZE: |
| must_be_readable( tst, "ioctl(SG_SET_RESERVED_SIZE)", |
| arg3, sizeof(int) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| case SG_SET_TIMEOUT: |
| must_be_readable( tst, "ioctl(SG_SET_TIMEOUT)", arg3, |
| sizeof(int) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| case SG_GET_RESERVED_SIZE: |
| must_be_writable( tst, "ioctl(SG_GET_RESERVED_SIZE)", arg3, |
| sizeof(int) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res) && res == 0) |
| make_readable (arg3, sizeof(int)); |
| break; |
| case SG_GET_TIMEOUT: |
| must_be_writable( tst, "ioctl(SG_GET_TIMEOUT)", arg3, |
| sizeof(int) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res) && res == 0) |
| make_readable (arg3, sizeof(int)); |
| break; |
| case SG_GET_VERSION_NUM: |
| must_be_readable( tst, "ioctl(SG_GET_VERSION_NUM)", |
| arg3, sizeof(int) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| # endif |
| |
| case IIOCGETCPS: |
| /* In early 2.4 kernels, ISDN_MAX_CHANNELS was only defined |
| * when KERNEL was. I never saw a larger value than 64 though */ |
| # ifndef ISDN_MAX_CHANNELS |
| # define ISDN_MAX_CHANNELS 64 |
| # endif |
| must_be_writable( tst, "ioctl(IIOCGETCPS)", arg3, |
| ISDN_MAX_CHANNELS |
| * 2 * sizeof(unsigned long) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res) && res == 0) |
| make_readable ( arg3, ISDN_MAX_CHANNELS |
| * 2 * sizeof(unsigned long) ); |
| break; |
| case IIOCNETGPN: |
| must_be_readable( tst, "ioctl(IIOCNETGPN)", |
| (UInt)&((isdn_net_ioctl_phone *)arg3)->name, |
| sizeof(((isdn_net_ioctl_phone *)arg3)->name) ); |
| must_be_writable( tst, "ioctl(IIOCNETGPN)", arg3, |
| sizeof(isdn_net_ioctl_phone) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res) && res == 0) |
| make_readable ( arg3, sizeof(isdn_net_ioctl_phone) ); |
| break; |
| |
| /* These all use struct ifreq AFAIK */ |
| case SIOCGIFINDEX: |
| case SIOCGIFFLAGS: /* get flags */ |
| case SIOCGIFHWADDR: /* Get hardware address */ |
| case SIOCGIFMTU: /* get MTU size */ |
| case SIOCGIFADDR: /* get PA address */ |
| case SIOCGIFNETMASK: /* get network PA mask */ |
| case SIOCGIFMETRIC: /* get metric */ |
| case SIOCGIFMAP: /* Get device parameters */ |
| case SIOCGIFTXQLEN: /* Get the tx queue length */ |
| case SIOCGIFDSTADDR: /* get remote PA address */ |
| case SIOCGIFBRDADDR: /* get broadcast PA address */ |
| case SIOCGIFNAME: /* get iface name */ |
| must_be_writable(tst, "ioctl(SIOCGIFINDEX)", arg3, |
| sizeof(struct ifreq)); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res) && res == 0) |
| make_readable (arg3, sizeof(struct ifreq)); |
| break; |
| case SIOCGIFCONF: /* get iface list */ |
| /* WAS: |
| must_be_writable("ioctl(SIOCGIFCONF)", arg3, |
| sizeof(struct ifconf)); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res) && res == 0) |
| make_readable (arg3, sizeof(struct ifconf)); |
| */ |
| must_be_readable(tst, "ioctl(SIOCGIFCONF)", arg3, |
| sizeof(struct ifconf)); |
| if ( arg3 ) { |
| // TODO len must be readable and writable |
| // buf pointer only needs to be readable |
| struct ifconf *ifc = (struct ifconf *) arg3; |
| must_be_writable(tst, "ioctl(SIOCGIFCONF).ifc_buf", |
| (Addr)(ifc->ifc_buf), (UInt)(ifc->ifc_len) ); |
| } |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res) && res == 0 && arg3 ) { |
| struct ifconf *ifc = (struct ifconf *) arg3; |
| make_readable ( (Addr)(ifc->ifc_buf), (UInt)(ifc->ifc_len) ); |
| } |
| break; |
| case SIOCGSTAMP: |
| must_be_writable(tst, "ioctl(SIOCGSTAMP)", arg3, |
| sizeof(struct timeval)); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res) && res == 0) |
| make_readable (arg3, sizeof(struct timeval)); |
| break; |
| case SIOCGRARP: /* get RARP table entry */ |
| case SIOCGARP: /* get ARP table entry */ |
| must_be_writable(tst, "ioctl(SIOCGARP)", arg3, |
| sizeof(struct arpreq)); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res) && res == 0) |
| make_readable (arg3, sizeof(struct arpreq)); |
| break; |
| |
| case SIOCSIFFLAGS: /* set flags */ |
| case SIOCSIFMAP: /* Set device parameters */ |
| case SIOCSIFTXQLEN: /* Set the tx queue length */ |
| case SIOCSIFDSTADDR: /* set remote PA address */ |
| case SIOCSIFBRDADDR: /* set broadcast PA address */ |
| case SIOCSIFNETMASK: /* set network PA mask */ |
| case SIOCSIFMETRIC: /* set metric */ |
| case SIOCSIFADDR: /* set PA address */ |
| case SIOCSIFMTU: /* set MTU size */ |
| case SIOCSIFHWADDR: /* set hardware address */ |
| must_be_readable(tst,"ioctl(SIOCSIFFLAGS)", arg3, |
| sizeof(struct ifreq)); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| /* Routing table calls. */ |
| case SIOCADDRT: /* add routing table entry */ |
| case SIOCDELRT: /* delete routing table entry */ |
| must_be_readable(tst,"ioctl(SIOCADDRT/DELRT)", arg3, |
| sizeof(struct rtentry)); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| /* RARP cache control calls. */ |
| case SIOCDRARP: /* delete RARP table entry */ |
| case SIOCSRARP: /* set RARP table entry */ |
| /* ARP cache control calls. */ |
| case SIOCSARP: /* set ARP table entry */ |
| case SIOCDARP: /* delete ARP table entry */ |
| must_be_readable(tst, "ioctl(SIOCSIFFLAGS)", arg3, |
| sizeof(struct ifreq)); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| case SIOCSPGRP: |
| must_be_readable( tst, "ioctl(SIOCSPGRP)", arg3, sizeof(int) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| /* linux/soundcard interface (OSS) */ |
| case SNDCTL_SEQ_GETOUTCOUNT: |
| case SNDCTL_SEQ_GETINCOUNT: |
| case SNDCTL_SEQ_PERCMODE: |
| case SNDCTL_SEQ_TESTMIDI: |
| case SNDCTL_SEQ_RESETSAMPLES: |
| case SNDCTL_SEQ_NRSYNTHS: |
| case SNDCTL_SEQ_NRMIDIS: |
| case SNDCTL_SEQ_GETTIME: |
| case SNDCTL_DSP_GETFMTS: |
| case SNDCTL_DSP_GETTRIGGER: |
| case SNDCTL_DSP_GETODELAY: |
| # if defined(SNDCTL_DSP_GETSPDIF) |
| case SNDCTL_DSP_GETSPDIF: |
| # endif |
| case SNDCTL_DSP_GETCAPS: |
| case SOUND_PCM_READ_RATE: |
| case SOUND_PCM_READ_CHANNELS: |
| case SOUND_PCM_READ_BITS: |
| case (SOUND_PCM_READ_BITS|0x40000000): /* what the fuck ? */ |
| case SOUND_PCM_READ_FILTER: |
| must_be_writable(tst,"ioctl(SNDCTL_XXX|SOUND_XXX (SIOR, int))", |
| arg3, |
| sizeof(int)); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res) && res == 0) |
| make_readable (arg3, sizeof(int)); |
| break; |
| case SNDCTL_SEQ_CTRLRATE: |
| case SNDCTL_DSP_SPEED: |
| case SNDCTL_DSP_STEREO: |
| case SNDCTL_DSP_GETBLKSIZE: |
| case SNDCTL_DSP_CHANNELS: |
| case SOUND_PCM_WRITE_FILTER: |
| case SNDCTL_DSP_SUBDIVIDE: |
| case SNDCTL_DSP_SETFRAGMENT: |
| # if defined(SNDCTL_DSP_GETCHANNELMASK) |
| case SNDCTL_DSP_GETCHANNELMASK: |
| # endif |
| # if defined(SNDCTL_DSP_BIND_CHANNEL) |
| case SNDCTL_DSP_BIND_CHANNEL: |
| # endif |
| case SNDCTL_TMR_TIMEBASE: |
| case SNDCTL_TMR_TEMPO: |
| case SNDCTL_TMR_SOURCE: |
| case SNDCTL_MIDI_PRETIME: |
| case SNDCTL_MIDI_MPUMODE: |
| must_be_readable(tst, "ioctl(SNDCTL_XXX|SOUND_XXX " |
| "(SIOWR, int))", |
| arg3, sizeof(int)); |
| must_be_writable(tst, "ioctl(SNDCTL_XXX|SOUND_XXX " |
| "(SIOWR, int))", |
| arg3, sizeof(int)); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| case SNDCTL_DSP_GETOSPACE: |
| case SNDCTL_DSP_GETISPACE: |
| must_be_writable(tst, |
| "ioctl(SNDCTL_XXX|SOUND_XXX " |
| "(SIOR, audio_buf_info))", arg3, |
| sizeof(audio_buf_info)); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res) && res == 0) |
| make_readable (arg3, sizeof(audio_buf_info)); |
| break; |
| case SNDCTL_DSP_SETTRIGGER: |
| must_be_readable(tst, "ioctl(SNDCTL_XXX|SOUND_XXX (SIOW, int))", |
| arg3, sizeof(int)); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| /* We don't have any specific information on it, so |
| try to do something reasonable based on direction and |
| size bits. The encoding scheme is described in |
| /usr/include/asm/ioctl.h. */ |
| default: { |
| UInt dir = _IOC_DIR(arg2); |
| UInt size = _IOC_SIZE(arg2); |
| if (/* size == 0 || */ dir == _IOC_NONE) { |
| VG_(message)(Vg_UserMsg, |
| "Warning: noted but unhandled ioctl 0x%x" |
| " with no size/direction hints", |
| arg2); |
| VG_(message)(Vg_UserMsg, |
| " This could cause spurious value errors" |
| " to appear."); |
| VG_(message)(Vg_UserMsg, |
| " See README_MISSING_SYSCALL_OR_IOCTL for guidance on" |
| " writing a proper wrapper." ); |
| } else { |
| if ((dir & _IOC_READ) && size > 0) |
| must_be_readable(tst, "ioctl(generic)", arg3, size); |
| if ((dir & _IOC_WRITE) && size > 0) |
| must_be_writable(tst, "ioctl(generic)", arg3, size); |
| } |
| KERNEL_DO_SYSCALL(tid,res); |
| if (size > 0 && (dir & _IOC_WRITE) |
| && !VG_(is_kerror)(res) && res == 0) |
| make_readable (arg3, size); |
| break; |
| } |
| } |
| break; |
| |
| case __NR_kill: /* syscall 37 */ |
| /* int kill(pid_t pid, int sig); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("kill ( %d, %d )\n", arg1,arg2); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| case __NR_link: /* syscall 9 */ |
| /* int link(const char *oldpath, const char *newpath); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("link ( %p, %p)\n", arg1, arg2); |
| must_be_readable_asciiz( tst, "link(oldpath)", arg1); |
| must_be_readable_asciiz( tst, "link(newpath)", arg2); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| case __NR_lseek: /* syscall 19 */ |
| /* off_t lseek(int fildes, off_t offset, int whence); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("lseek ( %d, %d, %d )\n",arg1,arg2,arg3); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| case __NR__llseek: /* syscall 140 */ |
| /* int _llseek(unsigned int fd, unsigned long offset_high, |
| unsigned long offset_low, |
| loff_t * result, unsigned int whence); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("llseek ( %d, 0x%x, 0x%x, %p, %d )\n", |
| arg1,arg2,arg3,arg4,arg5); |
| must_be_writable( tst, "llseek(result)", arg4, sizeof(loff_t)); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res) && res == 0) |
| make_readable( arg4, sizeof(loff_t) ); |
| break; |
| |
| case __NR_lstat: /* syscall 107 */ |
| /* int lstat(const char *file_name, struct stat *buf); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("lstat ( %p, %p )\n",arg1,arg2); |
| must_be_readable_asciiz( tst, "lstat(file_name)", arg1 ); |
| must_be_writable( tst, "lstat(buf)", arg2, sizeof(struct stat) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res) && res == 0) { |
| make_readable( arg2, sizeof(struct stat) ); |
| } |
| break; |
| |
| # if defined(__NR_lstat64) |
| case __NR_lstat64: /* syscall 196 */ |
| /* int lstat64(const char *file_name, struct stat64 *buf); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("lstat64 ( %p, %p )\n",arg1,arg2); |
| must_be_readable_asciiz( tst, "lstat64(file_name)", arg1 ); |
| must_be_writable( tst, "lstat64(buf)", arg2, sizeof(struct stat64) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res) && res == 0) { |
| make_readable( arg2, sizeof(struct stat64) ); |
| } |
| break; |
| # endif |
| |
| case __NR_mkdir: /* syscall 39 */ |
| /* int mkdir(const char *pathname, mode_t mode); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("mkdir ( %p, %d )\n", arg1,arg2); |
| must_be_readable_asciiz( tst, "mkdir(pathname)", arg1 ); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| # if defined(__NR_mmap2) |
| case __NR_mmap2: /* syscall 192 */ |
| /* My impression is that this is exactly like __NR_mmap |
| except that all 6 args are passed in regs, rather than in |
| a memory-block. */ |
| /* void* mmap(void *start, size_t length, int prot, |
| int flags, int fd, off_t offset); |
| */ |
| { |
| UInt arg6 = tst->m_ebp; |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("mmap2 ( %p, %d, %d, %d, %d, %d )\n", |
| arg1, arg2, arg3, arg4, arg5, arg6 ); |
| KERNEL_DO_SYSCALL(tid,res); |
| /* !!! shouldn't we also be doing the symtab loading stuff as |
| in __NR_mmap ? */ |
| if (!VG_(is_kerror)(res)) |
| approximate_mmap_permissions( (Addr)res, arg2, arg3 ); |
| } |
| break; |
| # endif |
| |
| case __NR_mmap: /* syscall 90 */ |
| /* void* mmap(void *start, size_t length, int prot, |
| int flags, int fd, off_t offset); |
| */ |
| { |
| Bool arg_block_readable |
| = VG_(clo_instrument) |
| ? VGM_(check_readable)(arg1, 6*sizeof(UInt), NULL) |
| : True; |
| must_be_readable( tst, "mmap(args)", arg1, 6*sizeof(UInt) ); |
| if (arg_block_readable) { |
| UInt* arg_block = (UInt*)arg1; |
| UInt arg6; |
| arg1 = arg_block[0]; |
| arg2 = arg_block[1]; |
| arg3 = arg_block[2]; |
| arg4 = arg_block[3]; |
| arg5 = arg_block[4]; |
| arg6 = arg_block[5]; |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("mmap ( %p, %d, %d, %d, %d, %d )\n", |
| arg1, arg2, arg3, arg4, arg5, arg6 ); |
| } |
| KERNEL_DO_SYSCALL(tid,res); |
| if (arg_block_readable && !VG_(is_kerror)(res)) |
| approximate_mmap_permissions( (Addr)res, arg2, arg3 ); |
| if (arg_block_readable && !VG_(is_kerror)(res) |
| && (arg3 & PROT_EXEC)) { |
| /* The client mmap'ed a segment with executable |
| permissions. Tell the symbol-table loader, so that it |
| has an opportunity to pick up more symbols if this mmap |
| was caused by the client loading a new .so via |
| dlopen(). This is important for debugging KDE. */ |
| VG_(read_symbols)(); |
| } |
| } |
| |
| break; |
| |
| case __NR_mprotect: /* syscall 125 */ |
| /* int mprotect(const void *addr, size_t len, int prot); */ |
| /* should addr .. addr+len-1 be checked before the call? */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("mprotect ( %p, %d, %d )\n", arg1,arg2,arg3); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res)) |
| approximate_mmap_permissions ( arg1, arg2, arg3 ); |
| break; |
| |
| case __NR_munmap: /* syscall 91 */ |
| /* int munmap(void *start, size_t length); */ |
| /* should start .. start+length-1 be checked before the call? */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("munmap ( %p, %d )\n", arg1,arg2); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res)) { |
| /* Mash around start and length so that the area passed to |
| make_noaccess() exactly covers an integral number of |
| pages. If we don't do that, our idea of addressible |
| memory diverges from that of the kernel's, which causes |
| the leak detector to crash. */ |
| Addr start = arg1; |
| Addr length = arg2; |
| while ((start % VKI_BYTES_PER_PAGE) > 0) { start--; length++; } |
| while (((start+length) % VKI_BYTES_PER_PAGE) > 0) { length++; } |
| /* |
| VG_(printf)("MUNMAP: correct (%p for %d) to (%p for %d) %s\n", |
| arg1, arg2, start, length, (arg1!=start || arg2!=length) |
| ? "CHANGE" : ""); |
| */ |
| make_noaccess( start, length ); |
| /* Tell our symbol table machinery about this, so that if |
| this happens to be a .so being unloaded, the relevant |
| symbols are removed too. */ |
| VG_(symtab_notify_munmap) ( start, length ); |
| } |
| break; |
| |
| case __NR_nanosleep: /* syscall 162 */ |
| /* int nanosleep(const struct timespec *req, struct timespec *rem); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("nanosleep ( %p, %p )\n", arg1,arg2); |
| must_be_readable ( tst, "nanosleep(req)", arg1, |
| sizeof(struct timespec) ); |
| if (arg2 != (UInt)NULL) |
| must_be_writable ( tst, "nanosleep(rem)", arg2, |
| sizeof(struct timespec) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| /* Somewhat bogus ... is only written by the kernel if |
| res == -1 && errno == EINTR. */ |
| if (!VG_(is_kerror)(res) && arg2 != (UInt)NULL) |
| make_readable ( arg2, sizeof(struct timespec) ); |
| break; |
| |
| case __NR__newselect: /* syscall 142 */ |
| /* int select(int n, |
| fd_set *readfds, fd_set *writefds, fd_set *exceptfds, |
| struct timeval *timeout); |
| */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("newselect ( %d, %p, %p, %p, %p )\n", |
| arg1,arg2,arg3,arg4,arg5); |
| if (arg2 != 0) |
| must_be_readable( tst, "newselect(readfds)", |
| arg2, arg1/8 /* __FD_SETSIZE/8 */ ); |
| if (arg3 != 0) |
| must_be_readable( tst, "newselect(writefds)", |
| arg3, arg1/8 /* __FD_SETSIZE/8 */ ); |
| if (arg4 != 0) |
| must_be_readable( tst, "newselect(exceptfds)", |
| arg4, arg1/8 /* __FD_SETSIZE/8 */ ); |
| if (arg5 != 0) |
| must_be_readable( tst, "newselect(timeout)", arg5, |
| sizeof(struct timeval) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| case __NR_open: /* syscall 5 */ |
| /* int open(const char *pathname, int flags); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("open ( %p(%s), %d ) --> ",arg1,arg1,arg2); |
| must_be_readable_asciiz( tst, "open(pathname)", arg1 ); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("%d\n",res); |
| break; |
| |
| case __NR_pipe: /* syscall 42 */ |
| /* int pipe(int filedes[2]); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("pipe ( %p ) ...\n", arg1); |
| must_be_writable( tst, "pipe(filedes)", arg1, 2*sizeof(int) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res)) |
| make_readable ( arg1, 2*sizeof(int) ); |
| if (VG_(clo_trace_syscalls) && !VG_(is_kerror)(res)) |
| VG_(printf)("SYSCALL[%d] pipe --> (rd %d, wr %d)\n", |
| VG_(getpid)(), |
| ((UInt*)arg1)[0], ((UInt*)arg1)[1] ); |
| break; |
| |
| case __NR_poll: /* syscall 168 */ |
| /* struct pollfd { |
| int fd; -- file descriptor |
| short events; -- requested events |
| short revents; -- returned events |
| }; |
| int poll(struct pollfd *ufds, unsigned int nfds, |
| int timeout) |
| */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("poll ( %d, %d, %d )\n",arg1,arg2,arg3); |
| /* In fact some parts of this struct should be readable too. |
| This should be fixed properly. */ |
| must_be_writable( tst, "poll(ufds)", |
| arg1, arg2 * sizeof(struct pollfd) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res) && res > 0) { |
| Int i; |
| struct pollfd * arr = (struct pollfd *)arg1; |
| for (i = 0; i < arg2; i++) |
| make_readable( (Addr)(&arr[i].revents), sizeof(Short) ); |
| } |
| break; |
| |
| case __NR_readlink: /* syscall 85 */ |
| /* int readlink(const char *path, char *buf, size_t bufsiz); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("readlink ( %p, %p, %d )\n", arg1,arg2,arg3); |
| must_be_readable_asciiz( tst, "readlink(path)", arg1 ); |
| must_be_writable ( tst, "readlink(buf)", arg2,arg3 ); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res) && res > 0) { |
| make_readable ( arg2, res ); |
| } |
| break; |
| |
| case __NR_readv: { /* syscall 145 */ |
| /* int readv(int fd, const struct iovec * vector, size_t count); */ |
| UInt i; |
| struct iovec * vec; |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("readv ( %d, %p, %d )\n",arg1,arg2,arg3); |
| must_be_readable( tst, "readv(vector)", |
| arg2, arg3 * sizeof(struct iovec) ); |
| /* ToDo: don't do any of the following if the vector is invalid */ |
| vec = (struct iovec *)arg2; |
| for (i = 0; i < arg3; i++) |
| must_be_writable( tst, "readv(vector[...])", |
| (UInt)vec[i].iov_base,vec[i].iov_len ); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res) && res > 0) { |
| /* res holds the number of bytes read. */ |
| for (i = 0; i < arg3; i++) { |
| Int nReadThisBuf = vec[i].iov_len; |
| if (nReadThisBuf > res) nReadThisBuf = res; |
| make_readable( (UInt)vec[i].iov_base, nReadThisBuf ); |
| res -= nReadThisBuf; |
| if (res < 0) VG_(panic)("vg_wrap_syscall: readv: res < 0"); |
| } |
| } |
| break; |
| } |
| |
| case __NR_rename: /* syscall 38 */ |
| /* int rename(const char *oldpath, const char *newpath); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("rename ( %p, %p )\n", arg1, arg2 ); |
| must_be_readable_asciiz( tst, "rename(oldpath)", arg1 ); |
| must_be_readable_asciiz( tst, "rename(newpath)", arg2 ); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| case __NR_rmdir: /* syscall 40 */ |
| /* int rmdir(const char *pathname); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("rmdir ( %p )\n", arg1); |
| must_be_readable_asciiz( tst, "rmdir(pathname)", arg1 ); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| case __NR_sched_setparam: |
| case __NR_sched_getparam: |
| case __NR_sched_yield: |
| case __NR_sched_get_priority_min: |
| if (VG_(clo_instrument)) { |
| VG_(message)(Vg_UserMsg, |
| "Warning: noted but unhandled __NR_sched_* syscall (%d).", |
| syscallno); |
| VG_(message)(Vg_UserMsg, |
| " This could cause spurious value errors" |
| " to appear."); |
| } |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| case __NR_select: /* syscall 82 */ |
| /* struct sel_arg_struct { |
| unsigned long n; |
| fd_set *inp, *outp, *exp; |
| struct timeval *tvp; |
| }; |
| int old_select(struct sel_arg_struct *arg); |
| */ |
| { |
| Bool arg_block_readable |
| = VG_(clo_instrument) |
| ? VGM_(check_readable)(arg1, 5*sizeof(UInt), NULL) |
| : True; |
| must_be_readable ( tst, "select(args)", arg1, 5*sizeof(UInt) ); |
| if (arg_block_readable) { |
| UInt* arg_struct = (UInt*)arg1; |
| arg1 = arg_struct[0]; |
| arg2 = arg_struct[1]; |
| arg3 = arg_struct[2]; |
| arg4 = arg_struct[3]; |
| arg5 = arg_struct[4]; |
| |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("select ( %d, %p, %p, %p, %p )\n", |
| arg1,arg2,arg3,arg4,arg5); |
| if (arg2 != (Addr)NULL) |
| must_be_readable(tst, "select(readfds)", arg2, |
| arg1/8 /* __FD_SETSIZE/8 */ ); |
| if (arg3 != (Addr)NULL) |
| must_be_readable(tst, "select(writefds)", arg3, |
| arg1/8 /* __FD_SETSIZE/8 */ ); |
| if (arg4 != (Addr)NULL) |
| must_be_readable(tst, "select(exceptfds)", arg4, |
| arg1/8 /* __FD_SETSIZE/8 */ ); |
| if (arg5 != (Addr)NULL) |
| must_be_readable(tst, "select(timeout)", arg5, |
| sizeof(struct timeval) ); |
| } |
| } |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| case __NR_setitimer: /* syscall 104 */ |
| /* setitimer(int which, const struct itimerval *value, |
| struct itimerval *ovalue); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("setitimer ( %d, %p, %p )\n", arg1,arg2,arg3); |
| must_be_readable(tst, "setitimer(value)", |
| arg2, sizeof(struct itimerval) ); |
| if (arg3 != (Addr)NULL) |
| must_be_writable(tst, "setitimer(ovalue)", |
| arg3, sizeof(struct itimerval)); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res) && arg3 != (Addr)NULL) { |
| make_readable(arg3, sizeof(struct itimerval)); |
| } |
| break; |
| |
| # if defined(__NR_setfsgid32) |
| case __NR_setfsgid32: /* syscall 216 */ |
| /* int setfsgid(uid_t fsgid); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("setfsgid ( %d )\n", arg1); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| # endif |
| |
| # if defined(__NR_setgid32) |
| case __NR_setgid32: /* syscall 214 */ |
| # endif |
| case __NR_setgid: /* syscall 46 */ |
| /* int setgid(gid_t gid); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("setgid ( %d )\n", arg1); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| case __NR_setsid: /* syscall 66 */ |
| /* pid_t setsid(void); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("setsid ()\n"); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| # if defined(__NR_setgroups32) |
| case __NR_setgroups32: /* syscall 206 */ |
| # endif |
| case __NR_setgroups: /* syscall 81 */ |
| /* int setgroups(size_t size, const gid_t *list); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("setgroups ( %d, %p )\n", arg1, arg2); |
| if (arg1 > 0) |
| must_be_readable ( tst, "setgroups(list)", arg2, |
| arg1 * sizeof(gid_t) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| case __NR_setpgid: /* syscall 57 */ |
| /* int setpgid(pid_t pid, pid_t pgid); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("setpgid ( %d, %d )\n", arg1, arg2); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| # if defined(__NR_setregid32) |
| case __NR_setregid32: /* syscall 204 */ |
| /* int setregid(gid_t rgid, gid_t egid); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("setregid32(?) ( %d, %d )\n", arg1, arg2); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| # endif |
| |
| # if defined(__NR_setresuid32) |
| case __NR_setresuid32: /* syscall 208 */ |
| /* int setresuid(uid_t ruid, uid_t euid, uid_t suid); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("setresuid32(?) ( %d, %d, %d )\n", arg1, arg2, arg3); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| # endif |
| |
| # if defined(__NR_setreuid32) |
| case __NR_setreuid32: /* syscall 203 */ |
| # endif |
| case __NR_setreuid: /* syscall 70 */ |
| /* int setreuid(uid_t ruid, uid_t euid); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("setreuid ( 0x%x, 0x%x )\n", arg1, arg2); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| case __NR_setrlimit: /* syscall 75 */ |
| /* int setrlimit (int resource, const struct rlimit *rlim); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("setrlimit ( %d, %p )\n", arg1,arg2); |
| must_be_readable( tst, "setrlimit(rlim)", arg2, sizeof(struct rlimit) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| # if defined(__NR_setuid32) |
| case __NR_setuid32: /* syscall 213 */ |
| # endif |
| case __NR_setuid: /* syscall 23 */ |
| /* int setuid(uid_t uid); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("setuid ( %d )\n", arg1); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| case __NR_socketcall: /* syscall 102 */ |
| /* int socketcall(int call, unsigned long *args); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("socketcall ( %d, %p )\n",arg1,arg2); |
| switch (arg1 /* request */) { |
| |
| case SYS_SOCKETPAIR: |
| /* int socketpair(int d, int type, int protocol, int sv[2]); */ |
| must_be_readable( tst, "socketcall.socketpair(args)", |
| arg2, 4*sizeof(Addr) ); |
| must_be_writable( tst, "socketcall.socketpair(sv)", |
| ((UInt*)arg2)[3], 2*sizeof(int) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res)) |
| make_readable ( ((UInt*)arg2)[3], 2*sizeof(int) ); |
| break; |
| |
| case SYS_SOCKET: |
| /* int socket(int domain, int type, int protocol); */ |
| must_be_readable( tst, "socketcall.socket(args)", |
| arg2, 3*sizeof(Addr) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| case SYS_BIND: |
| /* int bind(int sockfd, struct sockaddr *my_addr, |
| int addrlen); */ |
| must_be_readable( tst, "socketcall.bind(args)", |
| arg2, 3*sizeof(Addr) ); |
| must_be_readable( tst, "socketcall.bind(my_addr)", |
| ((UInt*)arg2)[1], ((UInt*)arg2)[2] ); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| case SYS_LISTEN: |
| /* int listen(int s, int backlog); */ |
| must_be_readable( tst, "socketcall.listen(args)", |
| arg2, 2*sizeof(Addr) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| case SYS_ACCEPT: { |
| /* int accept(int s, struct sockaddr *addr, int *p_addrlen); */ |
| Addr addr; |
| Addr p_addrlen; |
| UInt addrlen_in, addrlen_out; |
| must_be_readable( tst, "socketcall.accept(args)", |
| arg2, 3*sizeof(Addr) ); |
| addr = ((UInt*)arg2)[1]; |
| p_addrlen = ((UInt*)arg2)[2]; |
| if (p_addrlen != (Addr)NULL) { |
| must_be_readable ( tst, "socketcall.accept(addrlen)", |
| p_addrlen, sizeof(int) ); |
| addrlen_in = safe_dereference( p_addrlen, 0 ); |
| must_be_writable ( tst, "socketcall.accept(addr)", |
| addr, addrlen_in ); |
| } |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res) && res >= 0 && p_addrlen != (Addr)NULL) { |
| addrlen_out = safe_dereference( p_addrlen, 0 ); |
| if (addrlen_out > 0) |
| make_readable( addr, addrlen_out ); |
| } |
| break; |
| } |
| |
| case SYS_SENDTO: |
| /* int sendto(int s, const void *msg, int len, |
| unsigned int flags, |
| const struct sockaddr *to, int tolen); */ |
| must_be_readable( tst, "socketcall.sendto(args)", arg2, |
| 6*sizeof(Addr) ); |
| must_be_readable( tst, "socketcall.sendto(msg)", |
| ((UInt*)arg2)[1], /* msg */ |
| ((UInt*)arg2)[2] /* len */ ); |
| must_be_readable( tst, "socketcall.sendto(to)", |
| ((UInt*)arg2)[4], /* to */ |
| ((UInt*)arg2)[5] /* tolen */ ); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| case SYS_SEND: |
| /* int send(int s, const void *msg, size_t len, int flags); */ |
| must_be_readable( tst, "socketcall.send(args)", arg2, |
| 4*sizeof(Addr) ); |
| must_be_readable( tst, "socketcall.send(msg)", |
| ((UInt*)arg2)[1], /* msg */ |
| ((UInt*)arg2)[2] /* len */ ); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| case SYS_RECVFROM: |
| /* int recvfrom(int s, void *buf, int len, unsigned int flags, |
| struct sockaddr *from, int *fromlen); */ |
| must_be_readable( tst, "socketcall.recvfrom(args)", |
| arg2, 6*sizeof(Addr) ); |
| if ( ((UInt*)arg2)[4] /* from */ != 0) { |
| must_be_readable( tst, "socketcall.recvfrom(fromlen)", |
| ((UInt*)arg2)[5] /* fromlen */, |
| sizeof(int) ); |
| must_be_writable( tst, "socketcall.recvfrom(from)", |
| ((UInt*)arg2)[4], /*from*/ |
| safe_dereference( (Addr) |
| ((UInt*)arg2)[5], 0 ) ); |
| } |
| must_be_writable( tst, "socketcall.recvfrom(buf)", |
| ((UInt*)arg2)[1], /* buf */ |
| ((UInt*)arg2)[2] /* len */ ); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res) && res >= 0) { |
| make_readable( ((UInt*)arg2)[1], /* buf */ |
| ((UInt*)arg2)[2] /* len */ ); |
| if ( ((UInt*)arg2)[4] /* from */ != 0) { |
| make_readable( |
| ((UInt*)arg2)[4], /*from*/ |
| safe_dereference( (Addr) ((UInt*)arg2)[5], 0 ) ); |
| } |
| } |
| /* phew! */ |
| break; |
| |
| case SYS_RECV: |
| /* int recv(int s, void *buf, int len, unsigned int flags); */ |
| /* man 2 recv says: |
| The recv call is normally used only on a connected socket |
| (see connect(2)) and is identical to recvfrom with a NULL |
| from parameter. |
| */ |
| must_be_readable( tst, "socketcall.recv(args)", |
| arg2, 4*sizeof(Addr) ); |
| must_be_writable( tst, "socketcall.recv(buf)", |
| ((UInt*)arg2)[1], /* buf */ |
| ((UInt*)arg2)[2] /* len */ ); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res) && res >= 0 |
| && ((UInt*)arg2)[1] != (UInt)NULL) { |
| make_readable( ((UInt*)arg2)[1], /* buf */ |
| ((UInt*)arg2)[2] /* len */ ); |
| } |
| break; |
| |
| case SYS_CONNECT: { |
| struct sockaddr *sa; |
| /* int connect(int sockfd, |
| struct sockaddr *serv_addr, int addrlen ); */ |
| must_be_readable( tst, "socketcall.connect(args)", |
| arg2, 3*sizeof(Addr) ); |
| must_be_readable( tst, "socketcall.connect(serv_addr.sa_family)", |
| ((UInt*)arg2)[1], /* serv_addr */ |
| sizeof (sa_family_t)); |
| sa = (struct sockaddr *) (((UInt*)arg2)[1]); |
| if (sa->sa_family == AF_UNIX) |
| must_be_readable_asciiz( tst, |
| "socketcall.connect(serv_addr.sun_path)", |
| (UInt) ((struct sockaddr_un *) sa)->sun_path); |
| /* XXX There probably should be more cases here since not |
| all of the struct sockaddr_XXX must be initialized. But |
| wait until something pops up. */ |
| else |
| must_be_readable( tst, "socketcall.connect(serv_addr)", |
| ((UInt*)arg2)[1], /* serv_addr */ |
| ((UInt*)arg2)[2] /* addrlen */ ); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| } |
| |
| case SYS_SETSOCKOPT: |
| /* int setsockopt(int s, int level, int optname, |
| const void *optval, int optlen); */ |
| must_be_readable( tst, "socketcall.setsockopt(args)", |
| arg2, 5*sizeof(Addr) ); |
| must_be_readable( tst, "socketcall.setsockopt(optval)", |
| ((UInt*)arg2)[3], /* optval */ |
| ((UInt*)arg2)[4] /* optlen */ ); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| case SYS_GETSOCKOPT: |
| /* int setsockopt(int s, int level, int optname, |
| void *optval, socklen_t *optlen); */ |
| must_be_readable( tst, "socketcall.getsockopt(args)", |
| arg2, 5*sizeof(Addr) ); |
| { |
| Addr optval_p = ((UInt*)arg2)[3]; |
| Addr optlen_p = ((UInt*)arg2)[4]; |
| /* vg_assert(sizeof(socklen_t) == sizeof(UInt)); */ |
| UInt optlen_after; |
| UInt optlen = safe_dereference ( optlen_p, 0 ); |
| if (optlen > 0) |
| must_be_writable( tst, "socketcall.getsockopt(optval)", |
| optval_p, optlen ); |
| KERNEL_DO_SYSCALL(tid,res); |
| optlen_after = safe_dereference ( optlen_p, 0 ); |
| if (!VG_(is_kerror)(res) && optlen > 0 && optlen_after > 0) |
| make_readable( optval_p, optlen_after ); |
| } |
| break; |
| |
| case SYS_GETSOCKNAME: |
| /* int getsockname(int s, struct sockaddr* name, |
| int* namelen) */ |
| must_be_readable( tst, "socketcall.getsockname(args)", |
| arg2, 3*sizeof(Addr) ); |
| { |
| UInt namelen = safe_dereference( (Addr) ((UInt*)arg2)[2], 0); |
| if (namelen > 0) |
| must_be_writable( tst, "socketcall.getsockname(name)", |
| ((UInt*)arg2)[1], namelen ); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res)) { |
| namelen = safe_dereference( (Addr) ((UInt*)arg2)[2], 0); |
| if (namelen > 0 |
| && ((UInt*)arg2)[1] != (UInt)NULL) |
| make_readable( ((UInt*)arg2)[1], namelen ); |
| } |
| } |
| break; |
| |
| case SYS_GETPEERNAME: |
| /* int getpeername(int s, struct sockaddr* name, |
| int* namelen) */ |
| must_be_readable( tst, "socketcall.getpeername(args)", |
| arg2, 3*sizeof(Addr) ); |
| { |
| UInt namelen = safe_dereference( (Addr) ((UInt*)arg2)[2], 0); |
| if (namelen > 0) |
| must_be_writable( tst, "socketcall.getpeername(name)", |
| ((UInt*)arg2)[1], namelen ); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res)) { |
| namelen = safe_dereference( (Addr) ((UInt*)arg2)[2], 0); |
| if (namelen > 0 |
| && ((UInt*)arg2)[1] != (UInt)NULL) |
| make_readable( ((UInt*)arg2)[1], namelen ); |
| } |
| } |
| break; |
| |
| case SYS_SHUTDOWN: |
| /* int shutdown(int s, int how); */ |
| must_be_readable( tst, "socketcall.shutdown(args)", |
| arg2, 2*sizeof(Addr) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| case SYS_SENDMSG: |
| { |
| /* int sendmsg(int s, const struct msghdr *msg, int flags); */ |
| |
| /* this causes warnings, and I don't get why. glibc bug? |
| * (after all it's glibc providing the arguments array) |
| must_be_readable( "socketcall.sendmsg(args)", |
| arg2, 3*sizeof(Addr) ); |
| */ |
| |
| struct msghdr *msg = (struct msghdr *)((UInt *)arg2)[ 1 ]; |
| msghdr_foreachfield ( tst, msg, must_be_readable_sendmsg ); |
| |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| } |
| |
| case SYS_RECVMSG: |
| { |
| /* int recvmsg(int s, struct msghdr *msg, int flags); */ |
| |
| /* this causes warnings, and I don't get why. glibc bug? |
| * (after all it's glibc providing the arguments array) |
| must_be_readable( "socketcall.recvmsg(args)", |
| arg2, 3*sizeof(Addr) ); |
| */ |
| |
| struct msghdr *msg = (struct msghdr *)((UInt *)arg2)[ 1 ]; |
| msghdr_foreachfield ( tst, msg, must_be_writable_recvmsg ); |
| |
| KERNEL_DO_SYSCALL(tid,res); |
| |
| if ( !VG_(is_kerror)( res ) ) |
| msghdr_foreachfield( tst, msg, make_readable_recvmsg ); |
| |
| break; |
| } |
| |
| default: |
| VG_(message)(Vg_DebugMsg,"FATAL: unhandled socketcall 0x%x",arg1); |
| VG_(panic)("... bye!\n"); |
| break; /*NOTREACHED*/ |
| } |
| break; |
| |
| case __NR_stat: /* syscall 106 */ |
| /* int stat(const char *file_name, struct stat *buf); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("stat ( %p, %p )\n",arg1,arg2); |
| must_be_readable_asciiz( tst, "stat(file_name)", arg1 ); |
| must_be_writable( tst, "stat(buf)", arg2, sizeof(struct stat) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res)) |
| make_readable( arg2, sizeof(struct stat) ); |
| break; |
| |
| case __NR_statfs: /* syscall 99 */ |
| /* int statfs(const char *path, struct statfs *buf); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("statfs ( %p, %p )\n",arg1,arg2); |
| must_be_readable_asciiz( tst, "statfs(path)", arg1 ); |
| must_be_writable( tst, "stat(buf)", arg2, sizeof(struct statfs) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res)) |
| make_readable( arg2, sizeof(struct statfs) ); |
| break; |
| |
| case __NR_symlink: /* syscall 83 */ |
| /* int symlink(const char *oldpath, const char *newpath); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("symlink ( %p, %p )\n",arg1,arg2); |
| must_be_readable_asciiz( tst, "symlink(oldpath)", arg1 ); |
| must_be_readable_asciiz( tst, "symlink(newpath)", arg2 ); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| # if defined(__NR_stat64) |
| case __NR_stat64: /* syscall 195 */ |
| /* int stat64(const char *file_name, struct stat64 *buf); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("stat64 ( %p, %p )\n",arg1,arg2); |
| must_be_readable_asciiz( tst, "stat64(file_name)", arg1 ); |
| must_be_writable( tst, "stat64(buf)", arg2, sizeof(struct stat64) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res)) |
| make_readable( arg2, sizeof(struct stat64) ); |
| break; |
| # endif |
| |
| # if defined(__NR_fstat64) |
| case __NR_fstat64: /* syscall 197 */ |
| /* int fstat64(int filedes, struct stat64 *buf); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("fstat64 ( %d, %p )\n",arg1,arg2); |
| must_be_writable( tst, "fstat64(buf)", arg2, sizeof(struct stat64) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res)) |
| make_readable( arg2, sizeof(struct stat64) ); |
| break; |
| # endif |
| |
| case __NR_sysinfo: /* syscall 116 */ |
| /* int sysinfo(struct sysinfo *info); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("sysinfo ( %p )\n",arg1); |
| must_be_writable( tst, "sysinfo(info)", arg1, sizeof(struct sysinfo) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res)) |
| make_readable( arg1, sizeof(struct sysinfo) ); |
| break; |
| |
| case __NR_time: /* syscall 13 */ |
| /* time_t time(time_t *t); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("time ( %p )\n",arg1); |
| if (arg1 != (UInt)NULL) { |
| must_be_writable( tst, "time", arg1, sizeof(time_t) ); |
| } |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res) && arg1 != (UInt)NULL) { |
| make_readable( arg1, sizeof(time_t) ); |
| } |
| break; |
| |
| case __NR_times: /* syscall 43 */ |
| /* clock_t times(struct tms *buf); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("times ( %p )\n",arg1); |
| must_be_writable( tst, "times(buf)", arg1, sizeof(struct tms) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res) && arg1 != (UInt)NULL) { |
| make_readable( arg1, sizeof(struct tms) ); |
| } |
| break; |
| |
| case __NR_truncate: /* syscall 92 */ |
| /* int truncate(const char *path, size_t length); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("truncate ( %p, %d )\n", arg1,arg2); |
| must_be_readable_asciiz( tst, "truncate(path)", arg1 ); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| case __NR_umask: /* syscall 60 */ |
| /* mode_t umask(mode_t mask); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("umask ( %d )\n", arg1); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| case __NR_unlink: /* syscall 10 */ |
| /* int unlink(const char *pathname) */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("ulink ( %p )\n",arg1); |
| must_be_readable_asciiz( tst, "unlink(pathname)", arg1 ); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| case __NR_uname: /* syscall 122 */ |
| /* int uname(struct utsname *buf); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("uname ( %p )\n",arg1); |
| must_be_writable( tst, "uname(buf)", arg1, sizeof(struct utsname) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res) && arg1 != (UInt)NULL) { |
| make_readable( arg1, sizeof(struct utsname) ); |
| } |
| break; |
| |
| case __NR_utime: /* syscall 30 */ |
| /* int utime(const char *filename, struct utimbuf *buf); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("utime ( %p, %p )\n", arg1,arg2); |
| must_be_readable_asciiz( tst, "utime(filename)", arg1 ); |
| if (arg2 != (UInt)NULL) |
| must_be_readable( tst, "utime(buf)", arg2, |
| sizeof(struct utimbuf) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| |
| case __NR_wait4: /* syscall 114 */ |
| /* pid_t wait4(pid_t pid, int *status, int options, |
| struct rusage *rusage) */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("wait4 ( %d, %p, %d, %p )\n", |
| arg1,arg2,arg3,arg4); |
| if (arg2 != (Addr)NULL) |
| must_be_writable( tst, "wait4(status)", arg2, sizeof(int) ); |
| if (arg4 != (Addr)NULL) |
| must_be_writable( tst, "wait4(rusage)", arg4, |
| sizeof(struct rusage) ); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res)) { |
| if (arg2 != (Addr)NULL) |
| make_readable( arg2, sizeof(int) ); |
| if (arg4 != (Addr)NULL) |
| make_readable( arg4, sizeof(struct rusage) ); |
| } |
| break; |
| |
| case __NR_writev: { /* syscall 146 */ |
| /* int writev(int fd, const struct iovec * vector, size_t count); */ |
| UInt i; |
| struct iovec * vec; |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("writev ( %d, %p, %d )\n",arg1,arg2,arg3); |
| must_be_readable( tst, "writev(vector)", |
| arg2, arg3 * sizeof(struct iovec) ); |
| /* ToDo: don't do any of the following if the vector is invalid */ |
| vec = (struct iovec *)arg2; |
| for (i = 0; i < arg3; i++) |
| must_be_readable( tst, "writev(vector[...])", |
| (UInt)vec[i].iov_base,vec[i].iov_len ); |
| KERNEL_DO_SYSCALL(tid,res); |
| break; |
| } |
| |
| /*-------------------------- SIGNALS --------------------------*/ |
| |
| /* Normally set to 1, so that Valgrind's signal-simulation machinery |
| is engaged. Sometimes useful to disable (set to 0), for |
| debugging purposes, to make clients more deterministic. */ |
| # define SIGNAL_SIMULATION 1 |
| |
| case __NR_rt_sigaction: |
| case __NR_sigaction: |
| /* int sigaction(int signum, struct k_sigaction *act, |
| struct k_sigaction *oldact); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("sigaction ( %d, %p, %p )\n",arg1,arg2,arg3); |
| if (arg2 != (UInt)NULL) |
| must_be_readable( tst, "sigaction(act)", |
| arg2, sizeof(vki_ksigaction)); |
| if (arg3 != (UInt)NULL) |
| must_be_writable( tst, "sigaction(oldact)", |
| arg3, sizeof(vki_ksigaction)); |
| /* We do this one ourselves! */ |
| # if SIGNAL_SIMULATION |
| VG_(do__NR_sigaction)(tid); |
| res = tst->m_eax; |
| # else |
| /* debugging signals; when we don't handle them. */ |
| KERNEL_DO_SYSCALL(tid,res); |
| # endif |
| if (!VG_(is_kerror)(res) && res == 0 && arg3 != (UInt)NULL) |
| make_readable( arg3, sizeof(vki_ksigaction)); |
| break; |
| |
| case __NR_rt_sigprocmask: |
| case __NR_sigprocmask: |
| /* int sigprocmask(int how, k_sigset_t *set, |
| k_sigset_t *oldset); */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)("sigprocmask ( %d, %p, %p )\n",arg1,arg2,arg3); |
| if (arg2 != (UInt)NULL) |
| must_be_readable( tst, "sigprocmask(set)", |
| arg2, sizeof(vki_ksigset_t)); |
| if (arg3 != (UInt)NULL) |
| must_be_writable( tst, "sigprocmask(oldset)", |
| arg3, sizeof(vki_ksigset_t)); |
| KERNEL_DO_SYSCALL(tid,res); |
| if (!VG_(is_kerror)(res) && res == 0 && arg3 != (UInt)NULL) |
| make_readable( arg3, sizeof(vki_ksigset_t)); |
| # if SIGNAL_SIMULATION |
| /* For the reason why both the kernel and Valgrind process |
| sigprocmask, see the detailed comment at |
| vg_do__NR_sigprocmask(). */ |
| VG_(do__NR_sigprocmask) ( arg1 /*how*/, (vki_ksigset_t*) arg2 ); |
| # endif |
| break; |
| |
| default: |
| VG_(message) |
| (Vg_DebugMsg,"FATAL: unhandled syscall: %d",syscallno); |
| VG_(message) |
| (Vg_DebugMsg,"Do not panic. You may be able to fix this easily."); |
| VG_(message) |
| (Vg_DebugMsg,"Read the file README_MISSING_SYSCALL_OR_IOCTL."); |
| VG_(unimplemented)("no wrapper for the above system call"); |
| vg_assert(3+3 == 7); |
| break; /*NOTREACHED*/ |
| } |
| |
| /* { void zzzmemscan(void); zzzmemscan(); } */ |
| |
| if (! VG_(first_and_last_secondaries_look_plausible)) |
| sane_before_call = False; |
| |
| if (sane_before_call && (!sane_after_call)) { |
| VG_(message)(Vg_DebugMsg, "perform_assumed_nonblocking_syscall: "); |
| VG_(message)(Vg_DebugMsg, |
| "probable sanity check failure for syscall number %d\n", |
| syscallno ); |
| VG_(panic)("aborting due to the above ... bye!"); |
| } |
| |
| VGP_POPCC; |
| } |
| |
| |
| |
| /* Perform pre- and post- actions for a blocking syscall, but do not |
| do the syscall itself. If res is NULL, the pre-syscall actions are |
| to be performed. If res is non-NULL, the post-syscall actions are |
| to be performed, and *res is assumed to hold the result of the |
| syscall. This slightly strange scheme makes it impossible to |
| mistakenly use the value of *res in the pre-syscall actions. |
| |
| This doesn't actually do the syscall itself, it is important to |
| observe. |
| |
| Because %eax is used both for the syscall number before the call |
| and the result value afterwards, we can't reliably use it to get |
| the syscall number. So the caller has to pass it explicitly. |
| */ |
| void VG_(check_known_blocking_syscall) ( ThreadId tid, |
| Int syscallno, |
| Int* /*IN*/ res ) |
| { |
| Bool sane_before_post = True; |
| Bool sane_after_post = True; |
| ThreadState* tst = VG_(get_thread_state)( tid ); |
| UInt arg1 = tst->m_ebx; |
| UInt arg2 = tst->m_ecx; |
| UInt arg3 = tst->m_edx; |
| /* |
| UInt arg4 = tst->m_esi; |
| UInt arg5 = tst->m_edi; |
| */ |
| VGP_PUSHCC(VgpSyscall); |
| |
| if (res != NULL |
| && ! VG_(first_and_last_secondaries_look_plausible)) |
| sane_before_post = False; |
| |
| switch (syscallno) { |
| |
| case __NR_read: /* syscall 3 */ |
| /* size_t read(int fd, void *buf, size_t count); */ |
| if (res == NULL) { |
| /* PRE */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)( |
| "SYSCALL--PRE[%d,%d] read ( %d, %p, %d )\n", |
| VG_(getpid)(), tid, |
| arg1, arg2, arg3); |
| must_be_writable( tst, "read(buf)", arg2, arg3 ); |
| } else { |
| /* POST */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)( |
| "SYSCALL-POST[%d,%d] read ( %d, %p, %d ) --> %d\n", |
| VG_(getpid)(), tid, |
| arg1, arg2, arg3, *res); |
| if (!VG_(is_kerror)(*res) && *res > 0) { |
| make_readable( arg2, *res ); |
| } |
| } |
| break; |
| |
| case __NR_write: /* syscall 4 */ |
| /* size_t write(int fd, const void *buf, size_t count); */ |
| if (res == NULL) { |
| /* PRE */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)( |
| "SYSCALL--PRE[%d,%d] write ( %d, %p, %d )\n", |
| VG_(getpid)(), tid, |
| arg1, arg2, arg3); |
| must_be_readable( tst, "write(buf)", arg2, arg3 ); |
| } else { |
| /* POST */ |
| if (VG_(clo_trace_syscalls)) |
| VG_(printf)( |
| "SYSCALL-POST[%d,%d] write ( %d, %p, %d ) --> %d\n", |
| VG_(getpid)(), tid, |
| arg1, arg2, arg3, *res); |
| } |
| break; |
| |
| default: |
| VG_(printf)("check_known_blocking_syscall: unexpected %d\n", |
| syscallno); |
| VG_(panic)("check_known_blocking_syscall"); |
| /*NOTREACHED*/ |
| break; |
| } |
| |
| if (res != NULL) { /* only check after syscall */ |
| if (! VG_(first_and_last_secondaries_look_plausible)) |
| sane_after_post = False; |
| |
| if (sane_before_post && (!sane_after_post)) { |
| VG_(message)(Vg_DebugMsg, "perform_known_blocking_syscall: "); |
| VG_(message)(Vg_DebugMsg, |
| "probable sanity check failure for syscall number %d\n", |
| syscallno ); |
| VG_(panic)("aborting due to the above ... bye!"); |
| } |
| } |
| |
| VGP_POPCC; |
| } |
| |
| |
| /*--------------------------------------------------------------------*/ |
| /*--- end vg_syscall_mem.c ---*/ |
| /*--------------------------------------------------------------------*/ |