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#ifndef REMOTE_H
#define REMOTE_H
/* Helper functions for accessing (remote) memory. These functions
assume that all addresses are naturally aligned (e.g., 32-bit
quantity is stored at a 32-bit-aligned address. */
#ifdef UNW_LOCAL_ONLY
static inline int
fetch8 (unw_addr_space_t as, unw_accessors_t *a,
unw_word_t *addr, int8_t *valp, void *arg)
{
*valp = *(int8_t *) (uintptr_t) *addr;
*addr += 1;
return 0;
}
static inline int
fetch16 (unw_addr_space_t as, unw_accessors_t *a,
unw_word_t *addr, int16_t *valp, void *arg)
{
*valp = *(int16_t *) (uintptr_t) *addr;
*addr += 2;
return 0;
}
static inline int
fetch32 (unw_addr_space_t as, unw_accessors_t *a,
unw_word_t *addr, int32_t *valp, void *arg)
{
*valp = *(int32_t *) (uintptr_t) *addr;
*addr += 4;
return 0;
}
static inline int
fetchw (unw_addr_space_t as, unw_accessors_t *a,
unw_word_t *addr, unw_word_t *valp, void *arg)
{
*valp = *(unw_word_t *) (uintptr_t) *addr;
*addr += sizeof (unw_word_t);
return 0;
}
#else /* !UNW_LOCAL_ONLY */
#define WSIZE (sizeof (unw_word_t))
static inline int
fetch8 (unw_addr_space_t as, unw_accessors_t *a,
unw_word_t *addr, int8_t *valp, void *arg)
{
unw_word_t val, aligned_addr = *addr & -WSIZE, off = *addr - aligned_addr;
int ret;
*addr += 1;
ret = (*a->access_mem) (as, aligned_addr, &val, 0, arg);
#if __BYTE_ORDER == __LITTLE_ENDIAN
val >>= 8*off;
#else
val >>= 8*(WSIZE - 1 - off);
#endif
*valp = val & 0xff;
return ret;
}
static inline int
fetch16 (unw_addr_space_t as, unw_accessors_t *a,
unw_word_t *addr, int16_t *valp, void *arg)
{
unw_word_t val, aligned_addr = *addr & -WSIZE, off = *addr - aligned_addr;
int ret;
assert ((off & 0x1) == 0);
*addr += 2;
ret = (*a->access_mem) (as, aligned_addr, &val, 0, arg);
#if __BYTE_ORDER == __LITTLE_ENDIAN
val >>= 8*off;
#else
val >>= 8*(WSIZE - 2 - off);
#endif
*valp = val & 0xffff;
return ret;
}
static inline int
fetch32 (unw_addr_space_t as, unw_accessors_t *a,
unw_word_t *addr, int32_t *valp, void *arg)
{
unw_word_t val, aligned_addr = *addr & -WSIZE, off = *addr - aligned_addr;
int ret;
assert ((off & 0x3) == 0);
*addr += 4;
ret = (*a->access_mem) (as, aligned_addr, &val, 0, arg);
#if __BYTE_ORDER == __LITTLE_ENDIAN
val >>= 8*off;
#else
val >>= 8*(WSIZE - 4 - off);
#endif
*valp = val & 0xffffffff;
return ret;
}
static inline int
fetchw (unw_addr_space_t as, unw_accessors_t *a,
unw_word_t *addr, unw_word_t *valp, void *arg)
{
int ret;
ret = (*a->access_mem) (as, *addr, valp, 0, arg);
*addr += WSIZE;
return ret;
}
#endif /* !UNW_LOCAL_ONLY */
#endif /* REMOTE_H */
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