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04277e02 | 1 | /* Copyright (C) 2003-2019 Free Software Foundation, Inc. |
58e8ec84 UD |
2 | This file is part of the GNU C Library. |
3 | Contributed by Jakub Jelinek <jakub@redhat.com>, 2003. | |
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 | |
59ba27a6 | 16 | License along with the GNU C Library; if not, see |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
58e8ec84 UD |
18 | |
19 | #include <setjmp.h> | |
c7699aa5 | 20 | #include <jmpbuf-offsets.h> |
675620f7 | 21 | #include <stdint.h> |
58e8ec84 | 22 | #include <unwind.h> |
6bdd38ba | 23 | #include <bits/wordsize.h> |
db169ed5 | 24 | #include <sysdep.h> |
58e8ec84 | 25 | |
0ca13e14 RM |
26 | |
27 | /* Test if longjmp to JMPBUF would unwind the frame | |
28 | containing a local variable at ADDRESS. */ | |
29 | #define _JMPBUF_UNWINDS(jmpbuf, address, demangle) \ | |
30 | ((void *) (address) < (void *) demangle ((jmpbuf)->__gregs[__JB_GPR15])) | |
31 | ||
32 | ||
6bdd38ba UD |
33 | /* On s390{,x}, CFA is always 96 (resp. 160) bytes above actual |
34 | %r15. */ | |
675620f7 | 35 | #define _JMPBUF_CFA_UNWINDS_ADJ(_jmpbuf, _context, _adj) \ |
6bdd38ba UD |
36 | _JMPBUF_UNWINDS_ADJ (_jmpbuf, \ |
37 | (void *) (_Unwind_GetCFA (_context) \ | |
38 | - 32 - 2 * __WORDSIZE), _adj) | |
675620f7 | 39 | |
db169ed5 RM |
40 | static inline uintptr_t __attribute__ ((unused)) |
41 | _jmpbuf_sp (__jmp_buf regs) | |
42 | { | |
56e7d3ad | 43 | void *sp = (void *) (uintptr_t) regs[0].__gregs[__JB_GPR15]; |
db169ed5 RM |
44 | #ifdef PTR_DEMANGLE |
45 | PTR_DEMANGLE (sp); | |
46 | #endif | |
56e7d3ad | 47 | return (uintptr_t) sp; |
db169ed5 RM |
48 | } |
49 | ||
50 | #define _JMPBUF_UNWINDS_ADJ(_jmpbuf, _address, _adj) \ | |
51 | ((uintptr_t) (_address) - (_adj) < _jmpbuf_sp (_jmpbuf) - (_adj)) | |
f76c8499 | 52 | |
6bdd38ba | 53 | /* We use the normal longjmp for unwinding. */ |
f76c8499 | 54 | #define __libc_unwind_longjmp(buf, val) __libc_longjmp (buf, val) |