1 /* 2 * Copyright (C) 2018 The Android Open Source Project 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in 12 * the documentation and/or other materials provided with the 13 * distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #ifndef _BITS_SIGNAL_TYPES_H_ 30 #define _BITS_SIGNAL_TYPES_H_ 31 32 #include <limits.h> 33 #include <sys/cdefs.h> 34 #include <sys/types.h> 35 36 /* For 64-bit (and mips), the kernel's struct sigaction doesn't match the 37 * POSIX one, so we need to expose our own and translate behind the scenes. 38 * For 32-bit, we're stuck with the definitions we already shipped, 39 * even though they contain a sigset_t that's too small. See sigaction64. 40 */ 41 #define sigaction __kernel_sigaction 42 #include <linux/signal.h> 43 #undef sigaction 44 45 /* The arm and x86 kernel header files don't define _NSIG. */ 46 #ifndef _KERNEL__NSIG 47 #define _KERNEL__NSIG 64 48 #endif 49 50 /* Userspace's NSIG is the kernel's _NSIG + 1. */ 51 #define _NSIG (_KERNEL__NSIG + 1) 52 #define NSIG _NSIG 53 54 typedef int sig_atomic_t; 55 56 typedef __sighandler_t sig_t; /* BSD compatibility. */ 57 typedef __sighandler_t sighandler_t; /* glibc compatibility. */ 58 59 /* sigset_t is already large enough on LP64 and mips, but other LP32's sigset_t 60 * is just `unsigned long`. 61 */ 62 #if defined(__LP64__) || defined(__mips__) 63 typedef sigset_t sigset64_t; 64 #else 65 typedef struct { unsigned long __bits[_KERNEL__NSIG/LONG_BIT]; } sigset64_t; 66 #endif 67 68 #if defined(__LP64__) 69 70 #define __SIGACTION_BODY \ 71 int sa_flags; \ 72 union { \ 73 sighandler_t sa_handler; \ 74 void (*sa_sigaction)(int, struct siginfo*, void*); \ 75 }; \ 76 sigset_t sa_mask; \ 77 void (*sa_restorer)(void); \ 78 79 struct sigaction { __SIGACTION_BODY }; 80 struct sigaction64 { __SIGACTION_BODY }; 81 82 #undef __SIGACTION_BODY 83 84 #elif defined(__mips__) 85 86 #define __SIGACTION_BODY \ 87 int sa_flags; \ 88 union { \ 89 sighandler_t sa_handler; \ 90 void (*sa_sigaction)(int, struct siginfo*, void*); \ 91 }; \ 92 sigset_t sa_mask; \ 93 94 struct sigaction { __SIGACTION_BODY }; 95 struct sigaction64 { __SIGACTION_BODY }; 96 97 #undef __SIGACTION_BODY 98 99 #else 100 101 #undef sa_handler 102 #undef sa_sigaction 103 104 struct sigaction { 105 union { 106 sighandler_t sa_handler; 107 void (*sa_sigaction)(int, struct siginfo*, void*); 108 }; 109 sigset_t sa_mask; 110 int sa_flags; 111 void (*sa_restorer)(void); 112 }; 113 114 /* This matches the kernel's internal structure. */ 115 struct sigaction64 { 116 union { 117 sighandler_t sa_handler; 118 void (*sa_sigaction)(int, struct siginfo*, void*); 119 }; 120 int sa_flags; 121 void (*sa_restorer)(void); 122 sigset64_t sa_mask; 123 }; 124 125 #endif 126 127 #endif 128
