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1 | /* Copyright (C) 2003-2022 Free Software Foundation, Inc. |
---|---|
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 |
15 | License along with the GNU C Library; if not, see |
16 | <https://www.gnu.org/licenses/>. */ |
17 | |
18 | #include <setjmp.h> |
19 | #include <jmpbuf-offsets.h> |
20 | #include <stdint.h> |
21 | #include <unwind.h> |
22 | #include <bits/wordsize.h> |
23 | #include <sysdep.h> |
24 | |
25 | |
26 | /* Test if longjmp to JMPBUF would unwind the frame |
27 | containing a local variable at ADDRESS. */ |
28 | #define _JMPBUF_UNWINDS(jmpbuf, address, demangle) \ |
29 | ((void *) (address) < (void *) demangle ((jmpbuf)->__gregs[__JB_GPR15])) |
30 | |
31 | |
32 | /* On s390{,x}, CFA is always 96 (resp. 160) bytes above actual |
33 | %r15. */ |
34 | #define _JMPBUF_CFA_UNWINDS_ADJ(_jmpbuf, _context, _adj) \ |
35 | _JMPBUF_UNWINDS_ADJ (_jmpbuf, \ |
36 | (void *) (_Unwind_GetCFA (_context) \ |
37 | - 32 - 2 * __WORDSIZE), _adj) |
38 | |
39 | static inline uintptr_t __attribute__ ((unused)) |
40 | _jmpbuf_sp (__jmp_buf regs) |
41 | { |
42 | void *sp = (void *) (uintptr_t) regs[0].__gregs[__JB_GPR15]; |
43 | #ifdef PTR_DEMANGLE |
44 | PTR_DEMANGLE (sp); |
45 | #endif |
46 | return (uintptr_t) sp; |
47 | } |
48 | |
49 | #define _JMPBUF_UNWINDS_ADJ(_jmpbuf, _address, _adj) \ |
50 | ((uintptr_t) (_address) - (_adj) < _jmpbuf_sp (_jmpbuf) - (_adj)) |
51 | |
52 | /* We use the normal longjmp for unwinding. */ |
53 | #define __libc_unwind_longjmp(buf, val) __libc_longjmp (buf, val) |
54 |
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