libsanitizer/sanitizer_common/sanitizer_syscall_generic.inc

   1 //===-- sanitizer_syscall_generic.inc ---------------------------*- C++ -*-===//
   2 //
   3 // This file is distributed under the University of Illinois Open Source
   4 // License. See LICENSE.TXT for details.
   5 //
   6 //===----------------------------------------------------------------------===//
   7 //
   8 // Generic implementations of internal_syscall* and internal_iserror.
   9 //
  10 //===----------------------------------------------------------------------===//
  11
  12 #if SANITIZER_FREEBSD || SANITIZER_MAC || SANITIZER_NETBSD
  13 # define SYSCALL(name) SYS_ ## name
  14 #else
  15 # define SYSCALL(name) __NR_ ## name
  16 #endif
  17
  18 #if SANITIZER_NETBSD
  19 // We use 3 kinds of internal_syscall's for different types of retval in order
  20 // to address differences in calling conventions (e.g. registers to place the
  21 // return value in).
  22 //   - internal_syscall     for 32-bit length (int, pid_t)
  23 //   - internal_syscall64   for 64-bit length (off_t)
  24 //   - internal_syscall_ptr for pointer and (s)size_t
  25 # define  internal_syscall      syscall
  26 # define  internal_syscall64    __syscall
  27 // Handle syscall renames manually
  28 # define SYS_stat SYS___stat50
  29 # define SYS_lstat SYS___lstat50
  30 # define SYS_fstat SYS___fstat50
  31 # define SYS_gettimeofday SYS___gettimeofday50
  32 # define SYS_wait4 SYS___wait450
  33 # define SYS_getdents SYS___getdents30
  34 # define SYS_sigaltstack SYS___sigaltstack14
  35 # define SYS_sigprocmask SYS___sigprocmask14
  36 # define SYS_nanosleep SYS___nanosleep50
  37 # if SANITIZER_WORDSIZE == 64
  38 #  define internal_syscall_ptr  __syscall
  39 # else
  40 #  define internal_syscall_ptr  syscall
  41 # endif
  42 #elif defined(__x86_64__) && (SANITIZER_FREEBSD || SANITIZER_MAC)
  43 # define internal_syscall __syscall
  44 # else
  45 # define internal_syscall syscall
  46 #endif
  47
  48 bool internal_iserror(uptr retval, int *rverrno) {
  49   if (retval == (uptr)-1) {
  50     if (rverrno)
  51       *rverrno = errno;
  52     return true;
  53   } else {
  54     return false;
  55   }
  56 }