mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-23 05:20:06 +00:00
107 lines
3.2 KiB
C
107 lines
3.2 KiB
C
|
/* Dynamic loading of the libgcc unwinder. Generic version.
|
||
|
|
Copyright (C) 2021 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/>. */
|
||
|
|
|
||
|
|
#ifndef _UNWIND_LINK_H
|
||
|
|
#define _UNWIND_LINK_H
|
||
|
|
|
||
|
|
#include <unwind.h>
|
||
|
|
#include <unwind-arch.h>
|
||
|
|
|
||
|
|
#if !UNWIND_LINK_FRAME_ADJUSTMENT
|
||
|
|
static inline void *
|
||
|
|
unwind_arch_adjustment (void *prev, void *addr)
|
||
|
|
{
|
||
|
|
return addr;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef SHARED
|
||
|
|
# include <sysdep.h>
|
||
|
|
# include <unwind-resume.h>
|
||
|
|
|
||
|
|
# if UNWIND_LINK_FRAME_STATE_FOR
|
||
|
|
struct frame_state;
|
||
|
|
# endif
|
||
|
|
|
||
|
|
struct unwind_link
|
||
|
|
{
|
||
|
|
__typeof (_Unwind_Backtrace) *ptr__Unwind_Backtrace;
|
||
|
|
__typeof (_Unwind_ForcedUnwind) *ptr__Unwind_ForcedUnwind;
|
||
|
|
__typeof (_Unwind_GetCFA) *ptr__Unwind_GetCFA;
|
||
|
|
# if UNWIND_LINK_GETIP
|
||
|
|
__typeof (_Unwind_GetIP) *ptr__Unwind_GetIP;
|
||
|
|
# endif
|
||
|
|
__typeof (_Unwind_Resume) *ptr__Unwind_Resume;
|
||
|
|
#if UNWIND_LINK_FRAME_STATE_FOR
|
||
|
|
struct frame_state *(*ptr___frame_state_for) (void *, struct frame_state *);
|
||
|
|
#endif
|
||
|
|
_Unwind_Reason_Code (*ptr_personality) PERSONALITY_PROTO;
|
||
|
|
UNWIND_LINK_EXTRA_FIELDS
|
||
|
|
};
|
||
|
|
|
||
|
|
/* Return a pointer to the implementation, or NULL on failure. */
|
||
|
|
struct unwind_link *__libc_unwind_link_get (void);
|
||
|
|
libc_hidden_proto (__libc_unwind_link_get)
|
||
|
|
|
||
|
|
/* UNWIND_LINK_PTR returns the stored function pointer NAME from the
|
||
|
|
cached unwind link OBJ (which was previously returned by
|
||
|
|
__libc_unwind_link_get). */
|
||
|
|
# ifdef PTR_DEMANGLE
|
||
|
|
# define UNWIND_LINK_PTR(obj, name, ...) \
|
||
|
|
({ \
|
||
|
|
__typeof ((obj)->ptr_##name) __unwind_fptr = (obj)->ptr_##name; \
|
||
|
|
PTR_DEMANGLE (__unwind_fptr); \
|
||
|
|
__unwind_fptr; \
|
||
|
|
})
|
||
|
|
# else /* !PTR_DEMANGLE */
|
||
|
|
# define UNWIND_LINK_PTR(obj, name, ...) ((obj)->ptr_##name)
|
||
|
|
# endif
|
||
|
|
|
||
|
|
/* Called from fork, in the new subprocess. */
|
||
|
|
void __libc_unwind_link_after_fork (void);
|
||
|
|
|
||
|
|
/* Called from __libc_freeres. */
|
||
|
|
void __libc_unwind_link_freeres (void) attribute_hidden;
|
||
|
|
|
||
|
|
#else /* !SHARED */
|
||
|
|
|
||
|
|
/* Dummy implementation so that the code can be shared with the SHARED
|
||
|
|
version. */
|
||
|
|
struct unwind_link;
|
||
|
|
static inline struct unwind_link *
|
||
|
|
__libc_unwind_link_get (void)
|
||
|
|
{
|
||
|
|
/* Return something that is not a null pointer, so that error checks
|
||
|
|
succeed. */
|
||
|
|
return (struct unwind_link *) 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Directly call the static implementation. */
|
||
|
|
# define UNWIND_LINK_PTR(obj, name, ...) \
|
||
|
|
((void) (obj), &name)
|
||
|
|
|
||
|
|
static inline void
|
||
|
|
__libc_unwind_link_after_fork (void)
|
||
|
|
{
|
||
|
|
/* No need to clean up if the unwinder is statically linked. */
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* !SHARED */
|
||
|
|
|
||
|
|
#endif /* _UNWIND_LINK_H */
|