abort.c 3.6 KB

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  1. /* Copyright (C) 1991 Free Software Foundation, Inc.
  2. This file is part of the GNU C Library.
  3. The GNU C Library is free software; you can redistribute it and/or
  4. modify it under the terms of the GNU Library General Public License as
  5. published by the Free Software Foundation; either version 2 of the
  6. License, or (at your option) any later version.
  7. The GNU C Library is distributed in the hope that it will be useful,
  8. but WITHOUT ANY WARRANTY; without even the implied warranty of
  9. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  10. Library General Public License for more details.
  11. You should have received a copy of the GNU Library General Public
  12. License along with the GNU C Library; see the file COPYING.LIB. If
  13. not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  14. Cambridge, MA 02139, USA. */
  15. /* Hacked up for uClibc by Erik Andersen */
  16. #define _GNU_SOURCE
  17. #include <features.h>
  18. #include <signal.h>
  19. #include <stdio.h>
  20. #include <stdlib.h>
  21. #include <string.h>
  22. #include <unistd.h>
  23. #include <signal.h>
  24. #include <errno.h>
  25. /* Our last ditch effort to commit suicide */
  26. #if defined(__i386__)
  27. #define ABORT_INSTRUCTION asm ("hlt")
  28. #elif defined(__ia64__)
  29. #define ABORT_INSTRUCTION asm ("break 0")
  30. #elif defined(__mc68000__)
  31. #define ABORT_INSTRUCTION asm (".long 0xffffffff")
  32. #elif defined(__mips__)
  33. #define ABORT_INSTRUCTION asm ("break 255")
  34. #elif defined(__s390__)
  35. #define ABORT_INSTRUCTION asm (".word 0")
  36. #elif defined(__sparc__)
  37. #define ABORT_INSTRUCTION asm ("unimp 0xf00")
  38. #elif defined(__x86_64__)
  39. #define ABORT_INSTRUCTION asm ("hlt")
  40. #elif defined(__hppa__)
  41. #define ABORT_INSTRUCTION asm ("iitlbp %r0,(%r0)")
  42. #elif defined(__powerpc__)
  43. #define ABORT_INSTRUCTION asm (".long 0")
  44. #elif defined(__SH5__)
  45. #define ABORT_INSTRUCTION asm ("movi 0x10, r9; shori 0xff, r9; trapa r9")
  46. #elif defined(__sh2__)
  47. #define ABORT_INSTRUCTION asm ("trapa #32")
  48. #elif defined(__sh__)
  49. #define ABORT_INSTRUCTION asm ("trapa #0xff")
  50. #else
  51. #define ABORT_INSTRUCTION
  52. #endif
  53. extern void _exit __P((int __status)) __attribute__ ((__noreturn__));
  54. static int been_there_done_that = 0;
  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. /* Cause an abnormal program termination with core-dump */
  66. void abort(void)
  67. {
  68. sigset_t sigset;
  69. /* Make sure we acquire the lock before proceeding */
  70. LOCK;
  71. /* Unmask SIGABRT to be sure we can get it */
  72. if (__sigemptyset(&sigset) == 0 && __sigaddset(&sigset, SIGABRT) == 0) {
  73. sigprocmask(SIG_UNBLOCK, &sigset, (sigset_t *) NULL);
  74. }
  75. while (1) {
  76. /* Try to suicide with a SIGABRT */
  77. if (been_there_done_that == 0) {
  78. been_there_done_that++;
  79. abort_it:
  80. UNLOCK;
  81. raise(SIGABRT);
  82. LOCK;
  83. }
  84. /* Still here? Try to remove any signal handlers */
  85. if (been_there_done_that == 1) {
  86. struct sigaction act;
  87. been_there_done_that++;
  88. memset(&act, '\0', sizeof(struct sigaction));
  89. act.sa_handler = SIG_DFL;
  90. __sigfillset(&act.sa_mask);
  91. act.sa_flags = 0;
  92. sigaction(SIGABRT, &act, NULL);
  93. goto abort_it;
  94. }
  95. /* Still here? Try to suicide with an illegal instruction */
  96. if (been_there_done_that == 2) {
  97. been_there_done_that++;
  98. ABORT_INSTRUCTION;
  99. }
  100. /* Still here? Try to at least exit */
  101. if (been_there_done_that == 3) {
  102. been_there_done_that++;
  103. _exit(127);
  104. }
  105. /* Still here? We're screwed. Sleepy time. Good night. */
  106. while (1)
  107. /* Try for ever and ever */
  108. ABORT_INSTRUCTION;
  109. }
  110. }