jmpbuf-unwind.h 1.6 KB

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  1. /* Examine __jmp_buf for unwinding frames. RISC-V version.
  2. Copyright (C) 2003-2018 Free Software Foundation, Inc.
  3. This file is part of the GNU C Library.
  4. The GNU C Library is free software; you can redistribute it and/or
  5. modify it under the terms of the GNU Lesser General Public
  6. License as published by the Free Software Foundation; either
  7. version 2.1 of the License, or (at your option) any later version.
  8. The GNU C Library is distributed in the hope that it will be useful,
  9. but WITHOUT ANY WARRANTY; without even the implied warranty of
  10. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  11. Lesser General Public License for more details.
  12. You should have received a copy of the GNU Lesser General Public
  13. License along with the GNU C Library. If not, see
  14. <http://www.gnu.org/licenses/>. */
  15. #include <setjmp.h>
  16. #include <stdint.h>
  17. #include <unwind.h>
  18. #include <sysdep.h>
  19. /* Test if longjmp to JMPBUF would unwind the frame
  20. containing a local variable at ADDRESS. */
  21. #define _JMPBUF_UNWINDS(jmpbuf, address) \
  22. ((void *) (address) < (void *) ((jmpbuf)[0].__sp))
  23. #define _JMPBUF_CFA_UNWINDS_ADJ(_jmpbuf, _context, _adj) \
  24. _JMPBUF_UNWINDS_ADJ (_jmpbuf, (void *) _Unwind_GetCFA (_context), _adj)
  25. static inline uintptr_t __attribute__ ((unused))
  26. _jmpbuf_sp (__jmp_buf regs)
  27. {
  28. uintptr_t sp = regs[0].__sp;
  29. return sp;
  30. }
  31. #define _JMPBUF_UNWINDS_ADJ(_jmpbuf, _address, _adj) \
  32. ((uintptr_t) (_address) - (_adj) < _jmpbuf_sp (_jmpbuf) - (_adj))
  33. /* We use the normal longjmp for unwinding. */
  34. #define __libc_unwind_longjmp(buf, val) __libc_longjmp (buf, val)