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5f72b005 | 1 | /* Examine __jmp_buf for unwinding frames. C-SkY version. |
04277e02 | 2 | Copyright (C) 2018-2019 Free Software Foundation, Inc. |
5f72b005 MH |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library. If not, see | |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
5f72b005 MH |
18 | |
19 | #include <setjmp.h> | |
20 | #include <stdint.h> | |
21 | #include <unwind.h> | |
22 | #include <sysdep.h> | |
23 | ||
24 | /* Test if longjmp to JMPBUF would unwind the frame | |
25 | containing a local variable at ADDRESS. */ | |
26 | #define _JMPBUF_UNWINDS(jmpbuf, address, demangle) \ | |
27 | ((void *) (address) < (void *) demangle ((jmpbuf)[0].__sp)) | |
28 | ||
29 | #define _JMPBUF_CFA_UNWINDS_ADJ(_jmpbuf, _context, _adj) \ | |
30 | _JMPBUF_UNWINDS_ADJ (_jmpbuf, \ | |
31 | (void *) (_Unwind_Ptr) _Unwind_GetCFA (_context), \ | |
32 | _adj) | |
33 | ||
34 | static inline uintptr_t __attribute__ ((unused)) | |
35 | _jmpbuf_sp (__jmp_buf regs) | |
36 | { | |
37 | uintptr_t sp = (uintptr_t) regs[0].__sp; | |
38 | #ifdef PTR_DEMANGLE | |
39 | PTR_DEMANGLE (sp); | |
40 | #endif | |
41 | return sp; | |
42 | } | |
43 | ||
44 | #define _JMPBUF_UNWINDS_ADJ(_jmpbuf, _address, _adj) \ | |
45 | ((uintptr_t) (_address) - (_adj) < _jmpbuf_sp (_jmpbuf) - (_adj)) | |
46 | ||
47 | /* We use the normal longjmp for unwinding. */ | |
48 | #define __libc_unwind_longjmp(buf, val) __libc_longjmp (buf, val) |