| 1 | /* Copyright (C) 1991 Free Software Foundation, Inc. |
| 2 | This file is part of the GNU C Library. |
| 3 | |
| 4 | The GNU C Library is free software; you can redistribute it and/or |
| 5 | modify it under the terms of the GNU Library General Public License as |
| 6 | published by the Free Software Foundation; either version 2 of the |
| 7 | License, or (at your option) any later version. |
| 8 | |
| 9 | The GNU C Library is distributed in the hope that it will be useful, |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 12 | Library General Public License for more details. |
| 13 | |
| 14 | You should have received a copy of the GNU Library General Public |
| 15 | License along with the GNU C Library; see the file COPYING.LIB. If |
| 16 | not, write to the Free Software Foundation, Inc., 675 Mass Ave, |
| 17 | Cambridge, MA 02139, USA. */ |
| 18 | |
| 19 | /* Hacked up for uClibc by Erik Andersen */ |
| 20 | |
| 21 | #define _GNU_SOURCE |
| 22 | #include <features.h> |
| 23 | #include <signal.h> |
| 24 | #include <stdio.h> |
| 25 | #include <stdlib.h> |
| 26 | #include <string.h> |
| 27 | #include <unistd.h> |
| 28 | #include <signal.h> |
| 29 | #include <errno.h> |
| 30 | |
| 31 | |
| 32 | /* Our last ditch effort to commit suicide */ |
| 33 | #if defined(__i386__) |
| 34 | #define ABORT_INSTRUCTION asm ("hlt") |
| 35 | #elif defined(__ia64__) |
| 36 | #define ABORT_INSTRUCTION asm ("break 0") |
| 37 | #elif defined(__mc68000__) |
| 38 | #define ABORT_INSTRUCTION asm (".long 0xffffffff") |
| 39 | #elif defined(__mips__) |
| 40 | #define ABORT_INSTRUCTION asm ("break 255") |
| 41 | #elif defined(__s390__) |
| 42 | #define ABORT_INSTRUCTION asm (".word 0") |
| 43 | #elif defined(__sparc__) |
| 44 | #define ABORT_INSTRUCTION asm ("unimp 0xf00") |
| 45 | #elif defined(__x86_64__) |
| 46 | #define ABORT_INSTRUCTION asm ("hlt") |
| 47 | #else |
| 48 | #define ABORT_INSTRUCTION |
| 49 | #endif |
| 50 | |
| 51 | extern void weak_function _stdio_term(void); |
| 52 | extern void _exit __P((int __status)) __attribute__ ((__noreturn__)); |
| 53 | static int been_there_done_that = 0; |
| 54 | |
| 55 | /* Be prepared in case multiple threads try to abort(). */ |
| 56 | #ifdef __UCLIBC_HAS_THREADS__ |
| 57 | #include <pthread.h> |
| 58 | static pthread_mutex_t mylock = PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP; |
| 59 | # define LOCK pthread_mutex_lock(&mylock) |
| 60 | # define UNLOCK pthread_mutex_unlock(&mylock); |
| 61 | #else |
| 62 | # define LOCK |
| 63 | # define UNLOCK |
| 64 | #endif |
| 65 | |
| 66 | |
| 67 | /* Cause an abnormal program termination with core-dump. */ |
| 68 | void abort(void) |
| 69 | { |
| 70 | sigset_t sigset; |
| 71 | |
| 72 | /* Make sure we acquire the lock before proceeding. */ |
| 73 | LOCK; |
| 74 | |
| 75 | /* Unmask SIGABRT to be sure we can get it */ |
| 76 | if (__sigemptyset(&sigset) == 0 && __sigaddset(&sigset, SIGABRT) == 0) { |
| 77 | sigprocmask(SIG_UNBLOCK, &sigset, (sigset_t *) NULL); |
| 78 | } |
| 79 | |
| 80 | /* If we are using stdio, try to shut it down. At the very least, |
| 81 | * this will attempt to commit all buffered writes. It may also |
| 82 | * unbuffer all writable files, or close them outright. |
| 83 | * Check the stdio routines for details. */ |
| 84 | if (_stdio_term) |
| 85 | _stdio_term(); |
| 86 | |
| 87 | while (1) { |
| 88 | /* Try to suicide with a SIGABRT. */ |
| 89 | if (been_there_done_that == 0) { |
| 90 | been_there_done_that++; |
| 91 | UNLOCK; |
| 92 | raise(SIGABRT); |
| 93 | LOCK; |
| 94 | } |
| 95 | |
| 96 | /* Still here? Try to remove any signal handlers. */ |
| 97 | if (been_there_done_that == 1) { |
| 98 | struct sigaction act; |
| 99 | |
| 100 | been_there_done_that++; |
| 101 | memset (&act, '\0', sizeof (struct sigaction)); |
| 102 | act.sa_handler = SIG_DFL; |
| 103 | __sigfillset (&act.sa_mask); |
| 104 | act.sa_flags = 0; |
| 105 | sigaction (SIGABRT, &act, NULL); |
| 106 | } |
| 107 | |
| 108 | /* Still here? Try to suicide with an illegal instruction */ |
| 109 | if (been_there_done_that == 2) { |
| 110 | been_there_done_that++; |
| 111 | ABORT_INSTRUCTION; |
| 112 | } |
| 113 | |
| 114 | /* Still here? Try to at least exit */ |
| 115 | if (been_there_done_that == 3) { |
| 116 | been_there_done_that++; |
| 117 | _exit (127); |
| 118 | } |
| 119 | |
| 120 | /* Still here? We're screwed. Sleepy time. Good night */ |
| 121 | while (1) |
| 122 | /* Try for ever and ever. */ |
| 123 | ABORT_INSTRUCTION; |
| 124 | } |
| 125 | } |
| 126 | |
| 127 | |
