longjmp.c 1.9 KB

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  1. /* Copyright (C) 1991, 92, 94, 95, 97, 98, 2000 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 Lesser General Public
  5. License as published by the Free Software Foundation; either
  6. version 2.1 of the 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. Lesser General Public License for more details.
  11. You should have received a copy of the GNU Lesser General Public
  12. License along with the GNU C Library; if not, write to the Free
  13. Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  14. 02111-1307 USA. */
  15. #include <stddef.h>
  16. #include <setjmp.h>
  17. #include <signal.h>
  18. extern void __longjmp (__jmp_buf __env, int __val) attribute_noreturn;
  19. libc_hidden_proto(__longjmp)
  20. #if 0
  21. extern void _longjmp_unwind (jmp_buf env, int val);
  22. #endif
  23. extern __typeof(longjmp) __libc_longjmp attribute_noreturn;
  24. /* Set the signal mask to the one specified in ENV, and jump
  25. to the position specified in ENV, causing the setjmp
  26. call there to return VAL, or 1 if VAL is 0. */
  27. void __libc_longjmp (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, NULL);
  36. /* Call the machine-dependent function to restore machine state. */
  37. __longjmp (env[0].__jmpbuf, val ?: 1);
  38. }
  39. weak_alias(__libc_longjmp,longjmp)
  40. weak_alias(__libc_longjmp,siglongjmp)
  41. strong_alias(__libc_longjmp,__libc_siglongjmp)
  42. strong_alias(__libc_longjmp,_longjmp)