mirror of
https://github.com/tobast/libunwind-eh_elf.git
synced 2024-11-25 00:27:39 +01:00
129 lines
2.7 KiB
C
129 lines
2.7 KiB
C
#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;
|
|
|
|
if ((off & 0x1) != 0)
|
|
return -UNW_EINVAL;
|
|
|
|
*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;
|
|
|
|
if ((off & 0x3) != 0)
|
|
return -UNW_EINVAL;
|
|
|
|
*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 */
|