struct frame_state *
__frame_state_for (void *pc_target, struct frame_state *state_in)
{
fde *f;
void *insn, *end, *pc;
struct cie_info info;
struct frame_state_internal state;
f = find_fde (pc_target);
if (f == 0)
return 0;
insn = extract_cie_info (f, &info);
if (insn == 0)
return 0;
memset (&state, 0, sizeof (state));
state.s.retaddr_column = info.ra_regno;
state.s.eh_ptr = info.eh_ptr;
/* First decode all the insns in the CIE. */
end = next_fde ((fde*) get_cie (f));
while (insn < end)
insn = execute_cfa_insn (insn, &state, &info, 0);
insn = ((fde *)f) + 1;
if (info.augmentation[0] == 'z')
{
int i;
insn = decode_uleb128 (insn, &i);
insn += i;
}
/* Then the insns in the FDE up to our target PC. */
end = next_fde (f);
pc = f->pc_begin;
while (insn < end && pc <= pc_target)
insn = execute_cfa_insn (insn, &state, &info, &pc);
memcpy (state_in, &state.s, sizeof (state.s));
return state_in;
}
/* search this fde table for the one containing the pc */
static fde *
search_fdes (fde *this_fde, void *pc)
{
for (; this_fde->length != 0; this_fde = next_fde (this_fde))
{
/* Skip CIEs and linked once FDE entries. */
if (this_fde->CIE_delta == 0 || this_fde->pc_begin == 0)
continue;
if ((uaddr)((char *)pc - (char *)this_fde->pc_begin) < this_fde->pc_range)
return this_fde;
}
return NULL;
}
static size_t
count_fdes (fde *this_fde)
{
size_t count;
for (count = 0; this_fde->length != 0; this_fde = next_fde (this_fde))
{
/* Skip CIEs and linked once FDE entries. */
if (this_fde->CIE_delta == 0 || this_fde->pc_begin == 0)
continue;
++count;
}
return count;
}
static void
add_fdes (fde *this_fde, fde_accumulator *accu, void **beg_ptr, void **end_ptr)
{
void *pc_begin = *beg_ptr;
void *pc_end = *end_ptr;
for (; this_fde->length != 0; this_fde = next_fde (this_fde))
{
/* Skip CIEs and linked once FDE entries. */
if (this_fde->CIE_delta == 0 || this_fde->pc_begin == 0)
continue;
fde_insert (accu, this_fde);
if (this_fde->pc_begin < pc_begin)
pc_begin = this_fde->pc_begin;
if (this_fde->pc_begin + this_fde->pc_range > pc_end)
pc_end = this_fde->pc_begin + this_fde->pc_range;
}
*beg_ptr = pc_begin;
*end_ptr = pc_end;
}