CORE_ADDR
ppc64_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc)
{
#define MAX(a,b) ((a) > (b) ? (a) : (b))
unsigned int insns[MAX (MAX (ARRAY_SIZE (ppc64_standard_linkage1),
ARRAY_SIZE (ppc64_standard_linkage2)),
ARRAY_SIZE (ppc64_standard_linkage3)) - 1];
CORE_ADDR target;
if (ppc_insns_match_pattern (frame, pc, ppc64_standard_linkage3, insns)
&& (insns[8] != 0 || insns[9] != 0))
pc = ppc64_standard_linkage3_target (frame, pc, insns);
else if (ppc_insns_match_pattern (frame, pc, ppc64_standard_linkage2, insns)
&& (insns[10] != 0 || insns[11] != 0))
pc = ppc64_standard_linkage2_target (frame, pc, insns);
else if (ppc_insns_match_pattern (frame, pc, ppc64_standard_linkage1, insns))
pc = ppc64_standard_linkage1_target (frame, pc, insns);
else
return 0;
/* The PLT descriptor will either point to the already resolved target
address, or else to a glink stub. As the latter carry synthetic @plt
symbols, find_solib_trampoline_target should be able to resolve them. */
target = find_solib_trampoline_target (frame, pc);
return target ? target : pc;
}
static CORE_ADDR
ppc64_skip_trampoline_code_1 (struct frame_info *frame, CORE_ADDR pc)
{
#define MAX(a,b) ((a) > (b) ? (a) : (b))
unsigned int insns[MAX (MAX (MAX (ARRAY_SIZE (ppc64_standard_linkage1),
ARRAY_SIZE (ppc64_standard_linkage2)),
MAX (ARRAY_SIZE (ppc64_standard_linkage3),
ARRAY_SIZE (ppc64_standard_linkage4))),
MAX (MAX (ARRAY_SIZE (ppc64_standard_linkage5),
ARRAY_SIZE (ppc64_standard_linkage6)),
MAX (ARRAY_SIZE (ppc64_standard_linkage7),
ARRAY_SIZE (ppc64_standard_linkage8))))
- 1];
CORE_ADDR target;
int scan_limit, i;
scan_limit = 1;
/* When reverse-debugging, scan backward to check whether we are
in the middle of trampoline code. */
if (execution_direction == EXEC_REVERSE)
scan_limit = ARRAY_SIZE (insns) - 1;
for (i = 0; i < scan_limit; i++)
{
if (i < ARRAY_SIZE (ppc64_standard_linkage8) - 1
&& ppc_insns_match_pattern (frame, pc, ppc64_standard_linkage8, insns))
pc = ppc64_standard_linkage4_target (frame, insns);
else if (i < ARRAY_SIZE (ppc64_standard_linkage7) - 1
&& ppc_insns_match_pattern (frame, pc, ppc64_standard_linkage7,
insns))
pc = ppc64_standard_linkage3_target (frame, insns);
else if (i < ARRAY_SIZE (ppc64_standard_linkage6) - 1
&& ppc_insns_match_pattern (frame, pc, ppc64_standard_linkage6,
insns))
pc = ppc64_standard_linkage4_target (frame, insns);
else if (i < ARRAY_SIZE (ppc64_standard_linkage5) - 1
&& ppc_insns_match_pattern (frame, pc, ppc64_standard_linkage5,
insns)
&& (insns[8] != 0 || insns[9] != 0))
pc = ppc64_standard_linkage3_target (frame, insns);
else if (i < ARRAY_SIZE (ppc64_standard_linkage4) - 1
&& ppc_insns_match_pattern (frame, pc, ppc64_standard_linkage4,
insns)
&& (insns[9] != 0 || insns[10] != 0))
pc = ppc64_standard_linkage4_target (frame, insns);
else if (i < ARRAY_SIZE (ppc64_standard_linkage3) - 1
&& ppc_insns_match_pattern (frame, pc, ppc64_standard_linkage3,
insns)
&& (insns[8] != 0 || insns[9] != 0))
pc = ppc64_standard_linkage3_target (frame, insns);
else if (i < ARRAY_SIZE (ppc64_standard_linkage2) - 1
&& ppc_insns_match_pattern (frame, pc, ppc64_standard_linkage2,
insns)
&& (insns[10] != 0 || insns[11] != 0))
pc = ppc64_standard_linkage2_target (frame, insns);
else if (i < ARRAY_SIZE (ppc64_standard_linkage1) - 1
&& ppc_insns_match_pattern (frame, pc, ppc64_standard_linkage1,
insns))
pc = ppc64_standard_linkage1_target (frame, insns);
else
{
/* Scan backward one more instructions if doesn't match. */
pc -= 4;
continue;
}
/* The PLT descriptor will either point to the already resolved target
address, or else to a glink stub. As the latter carry synthetic @plt
symbols, find_solib_trampoline_target should be able to resolve them. */
target = find_solib_trampoline_target (frame, pc);
return target ? target : pc;
}
return 0;
}