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author | caiyinyu <caiyinyu@loongson.cn> | 2022-07-19 09:20:46 +0800 |
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committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2022-07-26 12:35:12 -0300 |
commit | a133942025da6fa62bb059b02f4e7a4b6e03e34a (patch) | |
tree | 0972c69aadd4aa075193882c960ed2b85ae27fe4 /sysdeps/loongarch/jmpbuf-unwind.h | |
parent | 2d83247d90c9f0bfee7f3f2505bc1b13b6f36c04 (diff) | |
download | glibc-a133942025da6fa62bb059b02f4e7a4b6e03e34a.tar.gz glibc-a133942025da6fa62bb059b02f4e7a4b6e03e34a.tar.xz glibc-a133942025da6fa62bb059b02f4e7a4b6e03e34a.zip |
LoongArch: ABI Implementation
Diffstat (limited to 'sysdeps/loongarch/jmpbuf-unwind.h')
-rw-r--r-- | sysdeps/loongarch/jmpbuf-unwind.h | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/sysdeps/loongarch/jmpbuf-unwind.h b/sysdeps/loongarch/jmpbuf-unwind.h new file mode 100644 index 0000000000..6fa509151d --- /dev/null +++ b/sysdeps/loongarch/jmpbuf-unwind.h @@ -0,0 +1,45 @@ +/* Examine __jmp_buf for unwinding frames. + Copyright (C) 2022 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library. If not, see + <https://www.gnu.org/licenses/>. */ + +#include <setjmp.h> +#include <stdint.h> +#include <unwind.h> +#include <sysdep.h> + +/* Test if longjmp to JMPBUF would unwind the frame + containing a local variable at ADDRESS. */ +#define _JMPBUF_UNWINDS(jmpbuf, address, demangle) \ + ((void *) (address) < (void *) demangle ((jmpbuf)[0].__sp)) + +#define _JMPBUF_CFA_UNWINDS_ADJ(_jmpbuf, _context, _adj) \ + _JMPBUF_UNWINDS_ADJ (_jmpbuf, (void *) _Unwind_GetCFA (_context), _adj) + +static inline uintptr_t __attribute__ ((unused)) _jmpbuf_sp (__jmp_buf regs) +{ + uintptr_t sp = regs[0].__sp; +#ifdef PTR_DEMANGLE + PTR_DEMANGLE (sp); +#endif + return sp; +} + +#define _JMPBUF_UNWINDS_ADJ(_jmpbuf, _address, _adj) \ + ((uintptr_t) (_address) - (_adj) < _jmpbuf_sp (_jmpbuf) - (_adj)) + +/* We use the normal longjmp for unwinding. */ +#define __libc_unwind_longjmp(buf, val) __libc_longjmp (buf, val) |