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2b778ceb | 1 | /* Copyright (C) 2005-2021 Free Software Foundation, Inc. |
389ae90e RM |
2 | This file is part of the GNU C Library. |
3 | ||
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 | ||
9 | The GNU C Library is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | Lesser General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU Lesser General Public | |
ab84e3ff | 15 | License along with the GNU C Library. If not, see |
5a82c748 | 16 | <https://www.gnu.org/licenses/>. */ |
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17 | |
18 | #include <setjmp.h> | |
19 | #include <stdint.h> | |
b7f2d27d | 20 | #include <sysdep.h> |
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21 | #include <unwind.h> |
22 | ||
23 | /* Test if longjmp to JMPBUF would unwind the frame | |
24 | containing a local variable at ADDRESS. */ | |
25 | #define _JMPBUF_UNWINDS(jmpbuf, address, demangle) \ | |
26 | ((void *) (address) < (void *) demangle (jmpbuf[__JMP_BUF_SP])) | |
27 | ||
28 | #define _JMPBUF_CFA_UNWINDS_ADJ(_jmpbuf, _context, _adj) \ | |
29 | _JMPBUF_UNWINDS_ADJ (_jmpbuf, (void *) _Unwind_GetCFA (_context), _adj) | |
30 | ||
b7f2d27d WN |
31 | static inline uintptr_t __attribute__ ((unused)) |
32 | _jmpbuf_sp (__jmp_buf regs) | |
33 | { | |
34 | uintptr_t sp = regs[__JMP_BUF_SP]; | |
35 | #ifdef PTR_DEMANGLE | |
36 | PTR_DEMANGLE (sp); | |
37 | #endif | |
38 | return sp; | |
39 | } | |
40 | ||
389ae90e | 41 | #define _JMPBUF_UNWINDS_ADJ(_jmpbuf, _address, _adj) \ |
b7f2d27d | 42 | ((uintptr_t) (_address) - (_adj) < _jmpbuf_sp (_jmpbuf) - (_adj)) |
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43 | |
44 | /* We use the normal longjmp for unwinding. */ | |
45 | #define __libc_unwind_longjmp(buf, val) __libc_longjmp (buf, val) |