sandbox/linux/system_headers/linux_signal.h

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef SANDBOX_LINUX_SYSTEM_HEADERS_LINUX_SIGNAL_H_
   6 #define SANDBOX_LINUX_SYSTEM_HEADERS_LINUX_SIGNAL_H_
   7
   8 // NOTE: On some toolchains, signal related ABI is incompatible with Linux's
   9 // (not undefined, but defined different values and in different memory
  10 // layouts). So, fill the gap here.
  11
  12 #if defined(__native_client_nonsfi__)
  13 #if !defined(__i386__) && !defined(__arm__)
  14 #error "Unsupported platform"
  15 #endif
  16
  17 #include <signal.h>
  18
  19 #define LINUX_SIGBUS 7    // 10 in PNaCl toolchain.
  20 #define LINUX_SIGSEGV 11  // 11 in PNaCl toolchain. Defined for consistency.
  21 #define LINUX_SIGCHLD 17  // 20 in PNaCl toolchain.
  22 #define LINUX_SIGSYS 31   // 12 in PNaCl toolchain.
  23
  24 #define LINUX_SIG_BLOCK 0    // 1 in PNaCl toolchain.
  25 #define LINUX_SIG_UNBLOCK 1  // 2 in PNaCl toolchain.
  26
  27 #define LINUX_SA_SIGINFO 4           // 2 in PNaCl toolchain.
  28 #define LINUX_SA_NODEFER 0x40000000  // Undefined in PNaCl toolchain.
  29 #define LINUX_SA_RESTART 0x10000000  // Undefined in PNaCl toolchain.
  30
  31 #define LINUX_SIG_DFL 0  // In PNaCl toolchain, unneeded cast is applied.
  32
  33 struct LinuxSigInfo {
  34   int si_signo;
  35   int si_errno;
  36   int si_code;
  37
  38   // Extra data is followed by the |si_code|. The length depends on the
  39   // signal number.
  40   char _sifields[1];
  41 };
  42
  43 #include "sandbox/linux/system_headers/linux_ucontext.h"
  44
  45 #else  // !defined(__native_client_nonsfi__)
  46
  47 // Just alias the toolchain's value.
  48 #include <signal.h>
  49
  50 #define LINUX_SIGBUS SIGBUS
  51 #define LINUX_SIGSEGV SIGSEGV
  52 #define LINUX_SIGCHLD SIGCHLD
  53 #define LINUX_SIGSYS SIGSYS
  54
  55 #define LINUX_SIG_BLOCK SIG_BLOCK
  56 #define LINUX_SIG_UNBLOCK SIG_UNBLOCK
  57
  58 #define LINUX_SA_SIGINFO SA_SIGINFO
  59 #define LINUX_SA_NODEFER SA_NODEFER
  60 #define LINUX_SA_RESTART SA_RESTART
  61
  62 #define LINUX_SIG_DFL SIG_DFL
  63
  64 typedef siginfo_t LinuxSigInfo;
  65
  66 #if defined(__ANDROID__)
  67 // Android's signal.h doesn't define ucontext etc.
  68 #include "sandbox/linux/system_headers/linux_ucontext.h"
  69 #endif  // defined(__ANDROID__)
  70
  71 #endif  // !defined(__native_client_nonsfi__)
  72
  73 #endif  // SANDBOX_LINUX_SYSTEM_HEADERS_LINUX_SIGNAL_H_