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58548b9d68
In the future, this will result in a compilation failure if the macros are unexpectedly undefined (due to header inclusion ordering or header inclusion missing altogether). Assembler sources are more difficult to convert. In many cases, they are hand-optimized for the mangling and no-mangling variants, which is why they are not converted. sysdeps/s390/s390-32/__longjmp.c and sysdeps/s390/s390-64/__longjmp.c are special: These are C sources, but most of the implementation is in assembler, so the PTR_DEMANGLE macro has to be undefined in some cases, to match the assembler style. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
45 lines
1.6 KiB
C
45 lines
1.6 KiB
C
/* Examine __jmp_buf for unwinding frames.
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Copyright (C) 2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library. If not, see
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<https://www.gnu.org/licenses/>. */
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#include <setjmp.h>
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#include <stdint.h>
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#include <unwind.h>
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#include <sysdep.h>
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#include <pointer_guard.h>
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/* Test if longjmp to JMPBUF would unwind the frame
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containing a local variable at ADDRESS. */
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#define _JMPBUF_UNWINDS(jmpbuf, address, demangle) \
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((void *) (address) < (void *) demangle ((jmpbuf)[0].__sp))
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#define _JMPBUF_CFA_UNWINDS_ADJ(_jmpbuf, _context, _adj) \
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_JMPBUF_UNWINDS_ADJ (_jmpbuf, (void *) _Unwind_GetCFA (_context), _adj)
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static inline uintptr_t __attribute__ ((unused)) _jmpbuf_sp (__jmp_buf regs)
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{
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uintptr_t sp = regs[0].__sp;
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PTR_DEMANGLE (sp);
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return sp;
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}
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#define _JMPBUF_UNWINDS_ADJ(_jmpbuf, _address, _adj) \
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((uintptr_t) (_address) - (_adj) < _jmpbuf_sp (_jmpbuf) - (_adj))
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/* We use the normal longjmp for unwinding. */
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#define __libc_unwind_longjmp(buf, val) __libc_longjmp (buf, val)
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