| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame] | 1 | /* Copyright (C) 2003-2015 Free Software Foundation, Inc. |
| 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 |
| 16 | License along with the GNU C Library; if not, see |
| 17 | <http://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | #include <setjmp.h> |
| 20 | #include <jmpbuf-offsets.h> |
| 21 | #include <stdint.h> |
| 22 | #include <unwind.h> |
| 23 | #include <bits/wordsize.h> |
| 24 | #include <sysdep.h> |
| 25 | |
| 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 | |
| 33 | /* On s390{,x}, CFA is always 96 (resp. 160) bytes above actual |
| 34 | %r15. */ |
| 35 | #define _JMPBUF_CFA_UNWINDS_ADJ(_jmpbuf, _context, _adj) \ |
| 36 | _JMPBUF_UNWINDS_ADJ (_jmpbuf, \ |
| 37 | (void *) (_Unwind_GetCFA (_context) \ |
| 38 | - 32 - 2 * __WORDSIZE), _adj) |
| 39 | |
| 40 | static inline uintptr_t __attribute__ ((unused)) |
| 41 | _jmpbuf_sp (__jmp_buf regs) |
| 42 | { |
| 43 | void *sp = (void *) (uintptr_t) regs[0].__gregs[__JB_GPR15]; |
| 44 | #ifdef PTR_DEMANGLE |
| 45 | PTR_DEMANGLE (sp); |
| 46 | #endif |
| 47 | return (uintptr_t) sp; |
| 48 | } |
| 49 | |
| 50 | #define _JMPBUF_UNWINDS_ADJ(_jmpbuf, _address, _adj) \ |
| 51 | ((uintptr_t) (_address) - (_adj) < _jmpbuf_sp (_jmpbuf) - (_adj)) |
| 52 | |
| 53 | /* We use the normal longjmp for unwinding. */ |
| 54 | #define __libc_unwind_longjmp(buf, val) __libc_longjmp (buf, val) |