longjmp.c 1.9 KB

1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253
  1. /* Copyright (C) 1991, 92, 94, 95, 97, 98 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 not,
  13. write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  14. Boston, MA 02111-1307, USA. */
  15. #include <stddef.h>
  16. #include <setjmp.h>
  17. #include <signal.h>
  18. #if 0
  19. extern void _longjmp_unwind (jmp_buf env, int val);
  20. #endif
  21. extern void __longjmp(__jmp_buf __env, int __val)
  22. __attribute__ ((__noreturn__));
  23. /* Set the signal mask to the one specified in ENV, and jump
  24. to the position specified in ENV, causing the setjmp
  25. call there to return VAL, or 1 if VAL is 0. */
  26. void
  27. __uClibc_siglongjmp (sigjmp_buf env, int val)
  28. {
  29. #if 0
  30. /* Perform any cleanups needed by the frames being unwound. */
  31. _longjmp_unwind (env, val);
  32. #endif
  33. if (env[0].__mask_was_saved)
  34. /* Restore the saved signal mask. */
  35. (void) __sigprocmask (SIG_SETMASK, &env[0].__saved_mask,
  36. (sigset_t *) NULL);
  37. /* Call the machine-dependent function to restore machine state. */
  38. __longjmp (env[0].__jmpbuf, val ?: 1);
  39. }
  40. __asm__(".weak longjmp; longjmp = __uClibc_siglongjmp");
  41. __asm__(".weak _longjmp; _longjmp = __uClibc_siglongjmp");
  42. __asm__(".weak siglongjmp; siglongjmp = __uClibc_siglongjmp");
  43. __asm__(".weak __sigprocmask; __sigprocmask = sigprocmask");