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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 <stdint.h> |
| 20 | #include <unwind.h> |
| 21 | #include <sysdep.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)[0].__sp)) |
| 27 | |
| 28 | #define _JMPBUF_CFA_UNWINDS_ADJ(_jmpbuf, _context, _adj) \ |
| 29 | _JMPBUF_UNWINDS_ADJ (_jmpbuf, \ |
| 30 | (void *) (_Unwind_Ptr) _Unwind_GetCFA (_context), \ |
| 31 | _adj) |
| 32 | |
| 33 | static inline uintptr_t __attribute__ ((unused)) |
| 34 | _jmpbuf_sp (__jmp_buf regs) |
| 35 | { |
| 36 | uintptr_t sp = (uintptr_t) regs[0].__sp; |
| 37 | #ifdef PTR_DEMANGLE |
| 38 | PTR_DEMANGLE (sp); |
| 39 | #endif |
| 40 | return sp; |
| 41 | } |
| 42 | |
| 43 | #define _JMPBUF_UNWINDS_ADJ(_jmpbuf, _address, _adj) \ |
| 44 | ((uintptr_t) (_address) - (_adj) < _jmpbuf_sp (_jmpbuf) - (_adj)) |
| 45 | |
| 46 | /* We use the normal longjmp for unwinding. */ |
| 47 | #define __libc_unwind_longjmp(buf, val) __libc_longjmp (buf, val) |
| 48 |
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