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 #if defined(__i386__) || defined(__x86_64__) || defined(__arm__) || \
  12     defined(__aarch64__)
  13
  14 #define LINUX_SIGHUP 1
  15 #define LINUX_SIGINT 2
  16 #define LINUX_SIGQUIT 3
  17 #define LINUX_SIGABRT 6
  18 #define LINUX_SIGBUS 7
  19 #define LINUX_SIGUSR1 10
  20 #define LINUX_SIGSEGV 11
  21 #define LINUX_SIGUSR2 12
  22 #define LINUX_SIGPIPE 13
  23 #define LINUX_SIGTERM 15
  24 #define LINUX_SIGCHLD 17
  25 #define LINUX_SIGSYS 31
  26
  27 #define LINUX_SIG_BLOCK 0
  28 #define LINUX_SIG_UNBLOCK 1
  29
  30 #define LINUX_SA_SIGINFO 4
  31 #define LINUX_SA_NODEFER 0x40000000
  32 #define LINUX_SA_RESTART 0x10000000
  33
  34 #define LINUX_SIG_DFL 0
  35
  36 #elif defined(__mips__)
  37
  38 #define LINUX_SIGHUP 1
  39 #define LINUX_SIGINT 2
  40 #define LINUX_SIGQUIT 3
  41 #define LINUX_SIGABRT 6
  42 #define LINUX_SIGBUS 10
  43 #define LINUX_SIGSEGV 11
  44 #define LINUX_SIGSYS 12
  45 #define LINUX_SIGPIPE 13
  46 #define LINUX_SIGTERM 15
  47 #define LINUX_SIGUSR1 16
  48 #define LINUX_SIGUSR2 17
  49 #define LINUX_SIGCHLD 18
  50
  51 #define LINUX_SIG_BLOCK 1
  52 #define LINUX_SIG_UNBLOCK 2
  53
  54 #define LINUX_SA_SIGINFO 0x00000008
  55 #define LINUX_SA_NODEFER 0x40000000
  56 #define LINUX_SA_RESTART 0x10000000
  57
  58 #define LINUX_SIG_DFL 0
  59
  60 #else
  61 #error "Unsupported platform"
  62 #endif
  63
  64 #if defined(__native_client_nonsfi__)
  65 #if !defined(__i386__) && !defined(__arm__)
  66 #error "Unsupported platform"
  67 #endif
  68
  69 #include <signal.h>
  70
  71 struct LinuxSigInfo {
  72   int si_signo;
  73   int si_errno;
  74   int si_code;
  75
  76   // Extra data is followed by the |si_code|. The length depends on the
  77   // signal number.
  78   char _sifields[1];
  79 };
  80
  81 #include "sandbox/linux/system_headers/linux_ucontext.h"
  82
  83 #else  // !defined(__native_client_nonsfi__)
  84
  85 #include <signal.h>
  86
  87 static_assert(LINUX_SIGHUP == SIGHUP, "LINUX_SIGHUP == SIGHUP");
  88 static_assert(LINUX_SIGINT == SIGINT, "LINUX_SIGINT == SIGINT");
  89 static_assert(LINUX_SIGQUIT == SIGQUIT, "LINUX_SIGQUIT == SIGQUIT");
  90 static_assert(LINUX_SIGABRT == SIGABRT, "LINUX_SIGABRT == SIGABRT");
  91 static_assert(LINUX_SIGBUS == SIGBUS, "LINUX_SIGBUS == SIGBUS");
  92 static_assert(LINUX_SIGUSR1 == SIGUSR1, "LINUX_SIGUSR1 == SIGUSR1");
  93 static_assert(LINUX_SIGSEGV == SIGSEGV, "LINUX_SIGSEGV == SIGSEGV");
  94 static_assert(LINUX_SIGUSR2 == SIGUSR2, "LINUX_SIGUSR2 == SIGUSR2");
  95 static_assert(LINUX_SIGPIPE == SIGPIPE, "LINUX_SIGPIPE == SIGPIPE");
  96 static_assert(LINUX_SIGTERM == SIGTERM, "LINUX_SIGTERM == SIGTERM");
  97 static_assert(LINUX_SIGCHLD == SIGCHLD, "LINUX_SIGCHLD == SIGCHLD");
  98 static_assert(LINUX_SIGSYS == SIGSYS, "LINUX_SIGSYS == SIGSYS");
  99 static_assert(LINUX_SIG_BLOCK == SIG_BLOCK, "LINUX_SIG_BLOCK == SIG_BLOCK");
 100 static_assert(LINUX_SIG_UNBLOCK == SIG_UNBLOCK,
 101               "LINUX_SIG_UNBLOCK == SIG_UNBLOCK");
 102 static_assert(LINUX_SA_SIGINFO == SA_SIGINFO, "LINUX_SA_SIGINFO == SA_SIGINFO");
 103 static_assert(LINUX_SA_NODEFER == SA_NODEFER, "LINUX_SA_NODEFER == SA_NODEFER");
 104 static_assert(LINUX_SA_RESTART == SA_RESTART, "LINUX_SA_RESTART == SA_RESTART");
 105 static_assert(LINUX_SIG_DFL == SIG_DFL, "LINUX_SIG_DFL == SIG_DFL");
 106
 107 typedef siginfo_t LinuxSigInfo;
 108
 109 #if defined(__ANDROID__)
 110 // Android's signal.h doesn't define ucontext etc.
 111 #include "sandbox/linux/system_headers/linux_ucontext.h"
 112 #endif  // defined(__ANDROID__)
 113
 114 #endif  // !defined(__native_client_nonsfi__)
 115
 116 // struct sigset_t is different size in PNaCl from the Linux's.
 117 #if defined(__mips__)
 118 #if !defined(_NSIG_WORDS)
 119 #define _NSIG_WORDS 4
 120 #endif
 121 struct LinuxSigSet {
 122   unsigned long sig[_NSIG_WORDS];
 123 };
 124 #else
 125 typedef uint64_t LinuxSigSet;
 126 #endif
 127
 128 // struct sigaction is different in PNaCl from the Linux's.
 129 #if defined(__mips__)
 130 struct LinuxSigAction {
 131   unsigned int sa_flags;
 132   void (*kernel_handler)(int);
 133   LinuxSigSet sa_mask;
 134 };
 135 #else
 136 struct LinuxSigAction {
 137   void (*kernel_handler)(int);
 138   uint32_t sa_flags;
 139   void (*sa_restorer)(void);
 140   LinuxSigSet sa_mask;
 141 };
 142 #endif
 143
 144 #endif  // SANDBOX_LINUX_SYSTEM_HEADERS_LINUX_SIGNAL_H_