abort.c 4.3 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 sigaction __sigaction
  17. #define _GNU_SOURCE
  18. #include <features.h>
  19. #include <signal.h>
  20. #include <stdio.h>
  21. #include <stdlib.h>
  22. #include <string.h>
  23. #include <unistd.h>
  24. #include <signal.h>
  25. #include <errno.h>
  26. /* Our last ditch effort to commit suicide */
  27. #if defined(__alpha__)
  28. #define ABORT_INSTRUCTION asm ("call_pal 0")
  29. #elif defined(__arm__)
  30. #define ABORT_INSTRUCTION asm ("bl abort")
  31. #elif defined(__hppa__)
  32. #define ABORT_INSTRUCTION asm ("iitlbp %r0,(%r0)")
  33. #elif defined(__i386__)
  34. #define ABORT_INSTRUCTION asm ("hlt")
  35. #elif defined(__ia64__)
  36. #define ABORT_INSTRUCTION asm ("break 0")
  37. #elif defined(__m68k__)
  38. #define ABORT_INSTRUCTION asm ("illegal")
  39. #elif defined(__mc68000__)
  40. #define ABORT_INSTRUCTION asm (".long 0xffffffff")
  41. #elif defined(__mips__)
  42. #define ABORT_INSTRUCTION asm ("break 255")
  43. #elif defined(__powerpc__)
  44. #define ABORT_INSTRUCTION asm (".long 0")
  45. #elif defined(__s390__)
  46. #define ABORT_INSTRUCTION asm (".word 0")
  47. #elif defined(__sparc__)
  48. #define ABORT_INSTRUCTION asm ("unimp 0xf00")
  49. #elif defined(__SH5__)
  50. #define ABORT_INSTRUCTION asm ("movi 0x10, r9; shori 0xff, r9; trapa r9")
  51. #elif defined(__sh2__)
  52. #define ABORT_INSTRUCTION asm ("trapa #32")
  53. #elif defined(__sh__)
  54. #define ABORT_INSTRUCTION asm ("trapa #0xff")
  55. #elif defined(__x86_64__)
  56. #define ABORT_INSTRUCTION asm ("hlt")
  57. #else
  58. #define ABORT_INSTRUCTION
  59. #warning no abort instruction define for your arch
  60. #endif
  61. #ifdef __UCLIBC_HAS_STDIO_SHUTDOWN_ON_ABORT__
  62. extern void weak_function _stdio_term(void) attribute_hidden;
  63. #endif
  64. static int been_there_done_that = 0;
  65. /* Be prepared in case multiple threads try to abort() */
  66. #ifdef __UCLIBC_HAS_THREADS__
  67. # include <pthread.h>
  68. static pthread_mutex_t mylock = PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP;
  69. #endif
  70. #define LOCK __pthread_mutex_lock(&mylock)
  71. #define UNLOCK __pthread_mutex_unlock(&mylock)
  72. extern int __raise (int __sig) __THROW attribute_hidden;
  73. /* Cause an abnormal program termination with core-dump */
  74. #undef __abort
  75. #undef abort
  76. void attribute_hidden __abort(void)
  77. {
  78. sigset_t sigset;
  79. /* Make sure we acquire the lock before proceeding */
  80. LOCK;
  81. /* Unmask SIGABRT to be sure we can get it */
  82. if (__sigemptyset(&sigset) == 0 && __sigaddset(&sigset, SIGABRT) == 0) {
  83. __sigprocmask(SIG_UNBLOCK, &sigset, (sigset_t *) NULL);
  84. }
  85. while (1) {
  86. /* Try to suicide with a SIGABRT */
  87. if (been_there_done_that == 0) {
  88. been_there_done_that++;
  89. #ifdef __UCLIBC_HAS_STDIO_SHUTDOWN_ON_ABORT__
  90. /* If we are using stdio, try to shut it down. At the very least,
  91. * this will attemt to commit all buffered writes. It may also
  92. * unboffer all writable files, or close them outright.
  93. * Check the stdio routines for details. */
  94. if (_stdio_term) {
  95. _stdio_term();
  96. }
  97. #endif
  98. abort_it:
  99. UNLOCK;
  100. __raise(SIGABRT);
  101. LOCK;
  102. }
  103. /* Still here? Try to remove any signal handlers */
  104. if (been_there_done_that == 1) {
  105. struct sigaction act;
  106. been_there_done_that++;
  107. __memset(&act, '\0', sizeof(struct sigaction));
  108. act.sa_handler = SIG_DFL;
  109. __sigfillset(&act.sa_mask);
  110. act.sa_flags = 0;
  111. sigaction(SIGABRT, &act, NULL);
  112. goto abort_it;
  113. }
  114. /* Still here? Try to suicide with an illegal instruction */
  115. if (been_there_done_that == 2) {
  116. been_there_done_that++;
  117. ABORT_INSTRUCTION;
  118. }
  119. /* Still here? Try to at least exit */
  120. if (been_there_done_that == 3) {
  121. been_there_done_that++;
  122. _exit_internal(127);
  123. }
  124. /* Still here? We're screwed. Sleepy time. Good night. */
  125. while (1)
  126. /* Try for ever and ever */
  127. ABORT_INSTRUCTION;
  128. }
  129. }
  130. strong_alias(__abort,abort)