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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>
103 lines
3.1 KiB
C
103 lines
3.1 KiB
C
/* Dynamic loading of the libgcc unwinder. Generic version.
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Copyright (C) 2021-2022 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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#ifndef _UNWIND_LINK_H
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#define _UNWIND_LINK_H
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#include <unwind.h>
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#include <unwind-arch.h>
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#if !UNWIND_LINK_FRAME_ADJUSTMENT
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static inline void *
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unwind_arch_adjustment (void *prev, void *addr)
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{
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return addr;
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}
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#endif
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#ifdef SHARED
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# include <pointer_guard.h>
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# include <unwind-resume.h>
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# if UNWIND_LINK_FRAME_STATE_FOR
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struct frame_state;
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# endif
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struct unwind_link
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{
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__typeof (_Unwind_Backtrace) *ptr__Unwind_Backtrace;
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__typeof (_Unwind_ForcedUnwind) *ptr__Unwind_ForcedUnwind;
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__typeof (_Unwind_GetCFA) *ptr__Unwind_GetCFA;
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# if UNWIND_LINK_GETIP
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__typeof (_Unwind_GetIP) *ptr__Unwind_GetIP;
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# endif
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__typeof (_Unwind_Resume) *ptr__Unwind_Resume;
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#if UNWIND_LINK_FRAME_STATE_FOR
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struct frame_state *(*ptr___frame_state_for) (void *, struct frame_state *);
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#endif
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_Unwind_Reason_Code (*ptr_personality) PERSONALITY_PROTO;
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UNWIND_LINK_EXTRA_FIELDS
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};
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/* Return a pointer to the implementation, or NULL on failure. */
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struct unwind_link *__libc_unwind_link_get (void);
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libc_hidden_proto (__libc_unwind_link_get)
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/* UNWIND_LINK_PTR returns the stored function pointer NAME from the
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cached unwind link OBJ (which was previously returned by
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__libc_unwind_link_get). */
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# define UNWIND_LINK_PTR(obj, name, ...) \
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({ \
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__typeof ((obj)->ptr_##name) __unwind_fptr = (obj)->ptr_##name; \
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PTR_DEMANGLE (__unwind_fptr); \
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__unwind_fptr; \
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})
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/* Called from fork, in the new subprocess. */
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void __libc_unwind_link_after_fork (void);
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/* Called from __libc_freeres. */
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void __libc_unwind_link_freeres (void) attribute_hidden;
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#else /* !SHARED */
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/* Dummy implementation so that the code can be shared with the SHARED
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version. */
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struct unwind_link;
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static inline struct unwind_link *
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__libc_unwind_link_get (void)
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{
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/* Return something that is not a null pointer, so that error checks
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succeed. */
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return (struct unwind_link *) 1;
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}
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/* Directly call the static implementation. */
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# define UNWIND_LINK_PTR(obj, name, ...) \
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((void) (obj), &name)
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static inline void
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__libc_unwind_link_after_fork (void)
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{
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/* No need to clean up if the unwinder is statically linked. */
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}
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#endif /* !SHARED */
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#endif /* _UNWIND_LINK_H */
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