mirror of
https://github.com/tobast/libunwind-eh_elf.git
synced 2024-11-22 07:37:38 +01:00
781d5d5263
for f in $(find src include -name '*.[ch]'); do expand -t 8 $f > $tmp; mv $tmp $f; done
357 lines
12 KiB
C
357 lines
12 KiB
C
/* libunwind - a platform-independent unwind library
|
|
Copyright (C) 2001-2005 Hewlett-Packard Co
|
|
Copyright (C) 2007 David Mosberger-Tang
|
|
Contributed by David Mosberger-Tang <dmosberger@gmail.com>
|
|
|
|
This file is part of libunwind.
|
|
|
|
Permission is hereby granted, free of charge, to any person obtaining
|
|
a copy of this software and associated documentation files (the
|
|
"Software"), to deal in the Software without restriction, including
|
|
without limitation the rights to use, copy, modify, merge, publish,
|
|
distribute, sublicense, and/or sell copies of the Software, and to
|
|
permit persons to whom the Software is furnished to do so, subject to
|
|
the following conditions:
|
|
|
|
The above copyright notice and this permission notice shall be
|
|
included in all copies or substantial portions of the Software.
|
|
|
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
|
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
|
|
LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
|
|
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
|
|
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
|
|
|
|
/* This files contains libunwind-internal definitions which are
|
|
subject to frequent change and are not to be exposed to
|
|
libunwind-users. */
|
|
|
|
#ifndef libunwind_i_h
|
|
#define libunwind_i_h
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include "config.h"
|
|
#endif
|
|
|
|
#include "compiler.h"
|
|
|
|
#ifdef HAVE___THREAD
|
|
/* For now, turn off per-thread caching. It uses up too much TLS
|
|
memory per thread even when the thread never uses libunwind at
|
|
all. */
|
|
# undef HAVE___THREAD
|
|
#endif
|
|
|
|
/* Platform-independent libunwind-internal declarations. */
|
|
|
|
#include <sys/types.h> /* HP-UX needs this before include of pthread.h */
|
|
|
|
#include <assert.h>
|
|
#include <libunwind.h>
|
|
#include <pthread.h>
|
|
#include <signal.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <sys/mman.h>
|
|
|
|
#if defined(HAVE_ELF_H)
|
|
# include <elf.h>
|
|
#elif defined(HAVE_SYS_ELF_H)
|
|
# include <sys/elf.h>
|
|
#else
|
|
# error Could not locate <elf.h>
|
|
#endif
|
|
|
|
#if defined(HAVE_ENDIAN_H)
|
|
# include <endian.h>
|
|
#elif defined(HAVE_SYS_ENDIAN_H)
|
|
# include <sys/endian.h>
|
|
#else
|
|
# define __LITTLE_ENDIAN 1234
|
|
# define __BIG_ENDIAN 4321
|
|
# if defined(__hpux)
|
|
# define __BYTE_ORDER __BIG_ENDIAN
|
|
# elif defined(__QNX__)
|
|
# if defined(__BIGENDIAN__)
|
|
# define __BYTE_ORDER __BIG_ENDIAN
|
|
# elif defined(__LITTLEENDIAN__)
|
|
# define __BYTE_ORDER __LITTLE_ENDIAN
|
|
# else
|
|
# error Host has unknown byte-order.
|
|
# endif
|
|
# else
|
|
# error Host has unknown byte-order.
|
|
# endif
|
|
#endif
|
|
|
|
#if defined(HAVE__BUILTIN_UNREACHABLE)
|
|
# define unreachable() __builtin_unreachable()
|
|
#else
|
|
# define unreachable() do { } while (1)
|
|
#endif
|
|
|
|
#ifdef DEBUG
|
|
# define UNW_DEBUG 1
|
|
#else
|
|
# define UNW_DEBUG 0
|
|
#endif
|
|
|
|
/* Make it easy to write thread-safe code which may or may not be
|
|
linked against libpthread. The macros below can be used
|
|
unconditionally and if -lpthread is around, they'll call the
|
|
corresponding routines otherwise, they do nothing. */
|
|
|
|
#pragma weak pthread_mutex_init
|
|
#pragma weak pthread_mutex_lock
|
|
#pragma weak pthread_mutex_unlock
|
|
|
|
#define mutex_init(l) \
|
|
(pthread_mutex_init != NULL ? pthread_mutex_init ((l), NULL) : 0)
|
|
#define mutex_lock(l) \
|
|
(pthread_mutex_lock != NULL ? pthread_mutex_lock (l) : 0)
|
|
#define mutex_unlock(l) \
|
|
(pthread_mutex_unlock != NULL ? pthread_mutex_unlock (l) : 0)
|
|
|
|
#ifdef HAVE_ATOMIC_OPS_H
|
|
# include <atomic_ops.h>
|
|
static inline int
|
|
cmpxchg_ptr (void *addr, void *old, void *new)
|
|
{
|
|
union
|
|
{
|
|
void *vp;
|
|
AO_t *aop;
|
|
}
|
|
u;
|
|
|
|
u.vp = addr;
|
|
return AO_compare_and_swap(u.aop, (AO_t) old, (AO_t) new);
|
|
}
|
|
# define fetch_and_add1(_ptr) AO_fetch_and_add1(_ptr)
|
|
# define fetch_and_add(_ptr, value) AO_fetch_and_add(_ptr, value)
|
|
/* GCC 3.2.0 on HP-UX crashes on cmpxchg_ptr() */
|
|
# if !(defined(__hpux) && __GNUC__ == 3 && __GNUC_MINOR__ == 2)
|
|
# define HAVE_CMPXCHG
|
|
# endif
|
|
# define HAVE_FETCH_AND_ADD
|
|
#elif defined(HAVE_SYNC_ATOMICS) || defined(HAVE_IA64INTRIN_H)
|
|
# ifdef HAVE_IA64INTRIN_H
|
|
# include <ia64intrin.h>
|
|
# endif
|
|
static inline int
|
|
cmpxchg_ptr (void *addr, void *old, void *new)
|
|
{
|
|
union
|
|
{
|
|
void *vp;
|
|
long *vlp;
|
|
}
|
|
u;
|
|
|
|
u.vp = addr;
|
|
return __sync_bool_compare_and_swap(u.vlp, (long) old, (long) new);
|
|
}
|
|
# define fetch_and_add1(_ptr) __sync_fetch_and_add(_ptr, 1)
|
|
# define fetch_and_add(_ptr, value) __sync_fetch_and_add(_ptr, value)
|
|
# define HAVE_CMPXCHG
|
|
# define HAVE_FETCH_AND_ADD
|
|
#endif
|
|
#define atomic_read(ptr) (*(ptr))
|
|
|
|
#define UNWI_OBJ(fn) UNW_PASTE(UNW_PREFIX,UNW_PASTE(I,fn))
|
|
#define UNWI_ARCH_OBJ(fn) UNW_PASTE(UNW_PASTE(UNW_PASTE(_UI,UNW_TARGET),_), fn)
|
|
|
|
#define unwi_full_mask UNWI_ARCH_OBJ(full_mask)
|
|
|
|
/* Type of a mask that can be used to inhibit preemption. At the
|
|
userlevel, preemption is caused by signals and hence sigset_t is
|
|
appropriate. In constrast, the Linux kernel uses "unsigned long"
|
|
to hold the processor "flags" instead. */
|
|
typedef sigset_t intrmask_t;
|
|
|
|
extern intrmask_t unwi_full_mask;
|
|
|
|
/* Silence compiler warnings about variables which are used only if libunwind
|
|
is configured in a certain way */
|
|
static inline void mark_as_used(void *v UNUSED) {
|
|
}
|
|
|
|
#if defined(CONFIG_BLOCK_SIGNALS)
|
|
# define SIGPROCMASK(how, new_mask, old_mask) \
|
|
sigprocmask((how), (new_mask), (old_mask))
|
|
#else
|
|
# define SIGPROCMASK(how, new_mask, old_mask) mark_as_used(old_mask)
|
|
#endif
|
|
|
|
/* Prefer adaptive mutexes if available */
|
|
#ifdef PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
|
|
#define UNW_PTHREAD_MUTEX_INITIALIZER PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
|
|
#else
|
|
#define UNW_PTHREAD_MUTEX_INITIALIZER PTHREAD_MUTEX_INITIALIZER
|
|
#endif
|
|
|
|
#define define_lock(name) \
|
|
pthread_mutex_t name = UNW_PTHREAD_MUTEX_INITIALIZER
|
|
#define lock_init(l) mutex_init (l)
|
|
#define lock_acquire(l,m) \
|
|
do { \
|
|
SIGPROCMASK (SIG_SETMASK, &unwi_full_mask, &(m)); \
|
|
mutex_lock (l); \
|
|
} while (0)
|
|
#define lock_release(l,m) \
|
|
do { \
|
|
mutex_unlock (l); \
|
|
SIGPROCMASK (SIG_SETMASK, &(m), NULL); \
|
|
} while (0)
|
|
|
|
#define SOS_MEMORY_SIZE 16384 /* see src/mi/mempool.c */
|
|
|
|
#ifndef MAP_ANONYMOUS
|
|
# define MAP_ANONYMOUS MAP_ANON
|
|
#endif
|
|
#define GET_MEMORY(mem, size) \
|
|
do { \
|
|
/* Hopefully, mmap() goes straight through to a system call stub... */ \
|
|
mem = mmap (NULL, size, PROT_READ | PROT_WRITE, \
|
|
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); \
|
|
if (mem == MAP_FAILED) \
|
|
mem = NULL; \
|
|
} while (0)
|
|
|
|
#define unwi_find_dynamic_proc_info UNWI_OBJ(find_dynamic_proc_info)
|
|
#define unwi_extract_dynamic_proc_info UNWI_OBJ(extract_dynamic_proc_info)
|
|
#define unwi_put_dynamic_unwind_info UNWI_OBJ(put_dynamic_unwind_info)
|
|
#define unwi_dyn_remote_find_proc_info UNWI_OBJ(dyn_remote_find_proc_info)
|
|
#define unwi_dyn_remote_put_unwind_info UNWI_OBJ(dyn_remote_put_unwind_info)
|
|
#define unwi_dyn_validate_cache UNWI_OBJ(dyn_validate_cache)
|
|
|
|
extern int unwi_find_dynamic_proc_info (unw_addr_space_t as,
|
|
unw_word_t ip,
|
|
unw_proc_info_t *pi,
|
|
int need_unwind_info, void *arg);
|
|
extern int unwi_extract_dynamic_proc_info (unw_addr_space_t as,
|
|
unw_word_t ip,
|
|
unw_proc_info_t *pi,
|
|
unw_dyn_info_t *di,
|
|
int need_unwind_info,
|
|
void *arg);
|
|
extern void unwi_put_dynamic_unwind_info (unw_addr_space_t as,
|
|
unw_proc_info_t *pi, void *arg);
|
|
|
|
/* These handle the remote (cross-address-space) case of accessing
|
|
dynamic unwind info. */
|
|
|
|
extern int unwi_dyn_remote_find_proc_info (unw_addr_space_t as,
|
|
unw_word_t ip,
|
|
unw_proc_info_t *pi,
|
|
int need_unwind_info,
|
|
void *arg);
|
|
extern void unwi_dyn_remote_put_unwind_info (unw_addr_space_t as,
|
|
unw_proc_info_t *pi,
|
|
void *arg);
|
|
extern int unwi_dyn_validate_cache (unw_addr_space_t as, void *arg);
|
|
|
|
extern unw_dyn_info_list_t _U_dyn_info_list;
|
|
extern pthread_mutex_t _U_dyn_info_list_lock;
|
|
|
|
#if UNW_DEBUG
|
|
#define unwi_debug_level UNWI_ARCH_OBJ(debug_level)
|
|
extern long unwi_debug_level;
|
|
|
|
# include <stdio.h>
|
|
# define Debug(level,format...) \
|
|
do { \
|
|
if (unwi_debug_level >= level) \
|
|
{ \
|
|
int _n = level; \
|
|
if (_n > 16) \
|
|
_n = 16; \
|
|
fprintf (stderr, "%*c>%s: ", _n, ' ', __FUNCTION__); \
|
|
fprintf (stderr, format); \
|
|
} \
|
|
} while (0)
|
|
# define Dprintf(format...) fprintf (stderr, format)
|
|
#else
|
|
# define Debug(level,format...)
|
|
# define Dprintf(format...)
|
|
#endif
|
|
|
|
static ALWAYS_INLINE int
|
|
print_error (const char *string)
|
|
{
|
|
return write (2, string, strlen (string));
|
|
}
|
|
|
|
#define mi_init UNWI_ARCH_OBJ(mi_init)
|
|
|
|
extern void mi_init (void); /* machine-independent initializations */
|
|
extern unw_word_t _U_dyn_info_list_addr (void);
|
|
|
|
/* This is needed/used by ELF targets only. */
|
|
|
|
struct elf_image
|
|
{
|
|
void *image; /* pointer to mmap'd image */
|
|
size_t size; /* (file-) size of the image */
|
|
};
|
|
|
|
struct elf_dyn_info
|
|
{
|
|
struct elf_image ei;
|
|
unw_dyn_info_t di_cache;
|
|
unw_dyn_info_t di_debug; /* additional table info for .debug_frame */
|
|
#if UNW_TARGET_IA64
|
|
unw_dyn_info_t ktab;
|
|
#endif
|
|
#if UNW_TARGET_ARM
|
|
unw_dyn_info_t di_arm; /* additional table info for .ARM.exidx */
|
|
#endif
|
|
};
|
|
|
|
static inline void invalidate_edi (struct elf_dyn_info *edi)
|
|
{
|
|
if (edi->ei.image)
|
|
munmap (edi->ei.image, edi->ei.size);
|
|
memset (edi, 0, sizeof (*edi));
|
|
edi->di_cache.format = -1;
|
|
edi->di_debug.format = -1;
|
|
#if UNW_TARGET_ARM
|
|
edi->di_arm.format = -1;
|
|
#endif
|
|
}
|
|
|
|
|
|
/* Provide a place holder for architecture to override for fast access
|
|
to memory when known not to need to validate and know the access
|
|
will be local to the process. A suitable override will improve
|
|
unw_tdep_trace() performance in particular. */
|
|
#define ACCESS_MEM_FAST(ret,validate,cur,addr,to) \
|
|
do { (ret) = dwarf_get ((cur), DWARF_MEM_LOC ((cur), (addr)), &(to)); } \
|
|
while (0)
|
|
|
|
/* Define GNU and processor specific values for the Phdr p_type field in case
|
|
they aren't defined by <elf.h>. */
|
|
#ifndef PT_GNU_EH_FRAME
|
|
# define PT_GNU_EH_FRAME 0x6474e550
|
|
#endif /* !PT_GNU_EH_FRAME */
|
|
#ifndef PT_ARM_EXIDX
|
|
# define PT_ARM_EXIDX 0x70000001 /* ARM unwind segment */
|
|
#endif /* !PT_ARM_EXIDX */
|
|
|
|
#include "tdep/libunwind_i.h"
|
|
|
|
#ifndef tdep_get_func_addr
|
|
# define tdep_get_func_addr(as,addr,v) (*(v) = addr, 0)
|
|
#endif
|
|
|
|
#ifndef DWARF_VAL_LOC
|
|
# define DWARF_IS_VAL_LOC(l) 0
|
|
# define DWARF_VAL_LOC(c,v) DWARF_NULL_LOC
|
|
#endif
|
|
|
|
#define UNW_ALIGN(x,a) (((x)+(a)-1UL)&~((a)-1UL))
|
|
|
|
#endif /* libunwind_i_h */
|