mirror of
https://github.com/tobast/libunwind-eh_elf.git
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bcdedf6b28
__sync_bool_compare_and_swap() since that's we need nowadays anyhow and since that's also provided by ecc v7.0. (Logical change 1.138)
289 lines
8.1 KiB
C
289 lines
8.1 KiB
C
/* libunwind - a platform-independent unwind library
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Copyright (C) 2001-2003 Hewlett-Packard Co
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Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
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This file is part of libunwind.
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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"Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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#ifndef internal_h
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#define internal_h
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#ifdef HAVE___THREAD
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/* For now, turn off per-thread caching. It uses up too much TLS
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memory per thread even when the thread never uses libunwind at
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all. */
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# undef HAVE___THREAD
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#endif
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/* Platform-independent libunwind-internal declarations. */
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#include <sys/types.h> /* HP-UX needs this before include of pthread.h */
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#include <assert.h>
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#include <libunwind.h>
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#include <pthread.h>
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#include <signal.h>
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#ifdef HAVE_ENDIAN_H
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# include <endian.h>
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#else
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# define __LITTLE_ENDIAN 1234
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# define __BIG_ENDIAN 4321
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# if defined(__hpux)
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# define __BYTE_ORDER __BIG_ENDIAN
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# else
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# error Host has unknown byte-order.
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# endif
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#endif
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#ifdef __GNUC__
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# define UNUSED __attribute__((unused))
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# if (__GNUC__ > 3) || (__GNUC__ == 3 && __GNUC_MINOR__ > 2)
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# define ALWAYS_INLINE __attribute__((always_inline))
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# define HIDDEN __attribute__((visibility ("hidden")))
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# else
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# define ALWAYS_INLINE
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# define HIDDEN
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# endif
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# if (__GNUC__ >= 3)
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# define likely(x) __builtin_expect ((x), 1)
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# define unlikely(x) __builtin_expect ((x), 0)
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# else
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# define likely(x) (x)
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# define unlikely(x) (x)
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# endif
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#else
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# define ALWAYS_INLINE
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# define UNUSED
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# define HIDDEN
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# define likely(x) (x)
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# define unlikely(x) (x)
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#endif
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#ifdef DEBUG
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# define UNW_DEBUG 1
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#else
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# define UNW_DEBUG 0
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#endif
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#if UNW_DEBUG
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# include <stdio.h>
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# define debug(level,format...) \
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do { if (tdep_debug_level > level) fprintf (stderr, format); } while (0)
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# define dprintf(format...) \
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fprintf (stderr, format)
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# ifdef __GNUC__
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# undef inline
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# define inline UNUSED
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# endif
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#else
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# define debug(level,format...)
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# define dprintf(format...)
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#endif
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#define NELEMS(a) (sizeof (a) / sizeof ((a)[0]))
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/* Make it easy to write thread-safe code which may or may not be
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linked against libpthread. The macros below can be used
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unconditionally and if -lpthread is around, they'll call the
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corresponding routines otherwise, they do nothing. */
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#pragma weak pthread_mutex_init
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#pragma weak pthread_mutex_lock
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#pragma weak pthread_mutex_unlock
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#define mutex_init(l) (pthread_mutex_init ? pthread_mutex_init ((l), 0) : 0)
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#define mutex_lock(l) (pthread_mutex_lock ? pthread_mutex_lock (l) : 0)
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#define mutex_unlock(l) (pthread_mutex_unlock ? pthread_mutex_unlock (l) : 0)
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#ifdef HAVE_ATOMIC_OPS_H
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# include <atomic_ops.h>
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# define cmpxchg_ptr(_ptr,_o,_n) AO_compare_and_swap((AO_T *)_ptr, \
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(AO_T) (_o), \
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(AO_T) (_n))
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# define fetch_and_add1(_ptr) AO_fetch_and_add1(_ptr)
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/* GCC 3.2.0 on HP-UX crashes on cmpxchg_ptr() */
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# if !(defined(__hpux) && __GNUC__ == 3 && __GNUC_MINOR__ == 2)
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# define HAVE_CMPXCHG
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# endif
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# define HAVE_FETCH_AND_ADD1
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#else
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# ifdef HAVE_IA64INTRIN_H
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# include <ia64intrin.h>
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# define cmpxchg_ptr(_ptr,_o,_n) \
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(__sync_bool_compare_and_swap((volatile long *) (_ptr), \
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(long) (_o), (long) (_n)))
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# define fetch_and_add1(_ptr) __sync_fetch_and_add(_ptr, 1)
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# define HAVE_CMPXCHG
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# define HAVE_FETCH_AND_ADD1
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# endif
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#endif
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#define UNWI_OBJ(fn) UNW_PASTE(UNW_PREFIX,UNW_PASTE(I,fn))
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#define UNWI_ARCH_OBJ(fn) UNW_PASTE(UNW_PASTE(UNW_PASTE(_UI,UNW_TARGET),_), fn)
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#define unwi_full_sigmask UNWI_ARCH_OBJ(full_sigmask)
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extern sigset_t unwi_full_sigmask;
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extern int UNWI_OBJ(find_dynamic_proc_info) (unw_addr_space_t as,
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unw_word_t ip,
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unw_proc_info_t *pi,
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int need_unwind_info, void *arg);
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extern int UNWI_ARCH_OBJ(extract_dynamic_proc_info) (unw_addr_space_t as,
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unw_word_t ip,
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unw_proc_info_t *pi,
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unw_dyn_info_t *di,
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int need_unwind_info,
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void *arg);
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extern void UNWI_OBJ(put_dynamic_unwind_info) (unw_addr_space_t as,
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unw_proc_info_t *pi, void *arg);
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extern int UNWI_ARCH_OBJ(dyn_remote_find_proc_info) (unw_addr_space_t as,
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unw_word_t ip,
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unw_proc_info_t *pi,
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unw_word_t *generation,
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int need_unwind_info,
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void *arg);
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extern void UNWI_ARCH_OBJ(dyn_remote_put_unwind_info) (unw_addr_space_t as,
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unw_proc_info_t *pi,
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void *arg);
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extern int UNWI_OBJ(get_proc_name) (unw_addr_space_t as, unw_word_t ip,
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char *buf, size_t buf_len,
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unw_word_t *offp, void *arg);
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#define unwi_find_dynamic_proc_info(as,ip,pi,n,arg) \
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UNWI_OBJ(find_dynamic_proc_info)(as, ip, pi, n, arg)
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#define unwi_extract_dynamic_proc_info(as,ip,pi,di,n,arg) \
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UNWI_ARCH_OBJ(extract_dynamic_proc_info)(as, ip, pi, di, n, arg)
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#define unwi_put_dynamic_unwind_info(as,pi,arg) \
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UNWI_OBJ(put_dynamic_unwind_info)(as, pi, arg)
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/* These handle the remote (cross-address-space) case of accessing
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dynamic unwind info. */
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#define unwi_dyn_remote_find_proc_info(as,i,p,g,n,arg) \
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UNWI_ARCH_OBJ(dyn_remote_find_proc_info)(as, i, p, g, n, arg)
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#define unwi_dyn_remote_put_unwind_info(as,p,arg) \
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UNWI_ARCH_OBJ(dyn_remote_put_unwind_info)(as, p, arg)
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#define unwi_get_proc_name(as,ip,b,s,o,arg) \
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UNWI_OBJ(get_proc_name)(as, ip, b, s, o, arg)
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extern unw_dyn_info_list_t _U_dyn_info_list;
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extern pthread_mutex_t _U_dyn_info_list_lock;
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#define WSIZE (sizeof (unw_word_t))
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static inline int
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fetch8 (unw_addr_space_t as, unw_accessors_t *a,
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unw_word_t *addr, int8_t *valp, void *arg)
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{
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unw_word_t val, aligned_addr = *addr & -WSIZE, off = *addr - aligned_addr;
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int ret;
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*addr += 1;
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ret = (*a->access_mem) (as, aligned_addr, &val, 0, arg);
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#if __BYTE_ORDER == __LITTLE_ENDIAN
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val >>= 8*off;
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#else
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val >>= 8*(WSIZE - 1 - off);
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#endif
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*valp = val & 0xff;
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return ret;
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}
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static inline int
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fetch16 (unw_addr_space_t as, unw_accessors_t *a,
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unw_word_t *addr, int16_t *valp, void *arg)
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{
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unw_word_t val, aligned_addr = *addr & -WSIZE, off = *addr - aligned_addr;
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int ret;
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assert ((off & 0x1) == 0);
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*addr += 2;
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ret = (*a->access_mem) (as, aligned_addr, &val, 0, arg);
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#if __BYTE_ORDER == __LITTLE_ENDIAN
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val >>= 8*off;
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#else
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val >>= 8*(WSIZE - 2 - off);
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#endif
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*valp = val & 0xffff;
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return ret;
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}
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static inline int
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fetch32 (unw_addr_space_t as, unw_accessors_t *a,
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unw_word_t *addr, int32_t *valp, void *arg)
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{
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unw_word_t val, aligned_addr = *addr & -WSIZE, off = *addr - aligned_addr;
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int ret;
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assert ((off & 0x3) == 0);
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*addr += 4;
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ret = (*a->access_mem) (as, aligned_addr, &val, 0, arg);
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#if __BYTE_ORDER == __LITTLE_ENDIAN
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val >>= 8*off;
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#else
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val >>= 8*(WSIZE - 4 - off);
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#endif
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*valp = val & 0xffffffff;
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return ret;
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}
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static inline int
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fetchw (unw_addr_space_t as, unw_accessors_t *a,
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unw_word_t *addr, unw_word_t *valp, void *arg)
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{
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int ret;
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ret = (*a->access_mem) (as, *addr, valp, 0, arg);
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*addr += WSIZE;
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return ret;
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}
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#define mi_init UNWI_ARCH_OBJ(mi_init)
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extern void mi_init (void); /* machine-independent initializations */
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/* This is needed/used by ELF targets only. */
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struct elf_image
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{
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void *image; /* pointer to mmap'd image */
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size_t size; /* (file-) size of the image */
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};
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#endif /* internal_h */
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