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(desc_alias): New function.

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(parse_dynamic): Handle UNW_DYN_ALIAS via desc_dynamic().

(Logical change 1.201)
This commit is contained in:
mostang.com!davidm 2004-04-01 06:01:53 +00:00
parent 835bb9110b
commit 93d627ef87
1 changed files with 45 additions and 10 deletions
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55
src/ia64/Gparser-ia64.c
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@ -744,6 +744,48 @@ lookup_preg (int regnum, int memory, struct ia64_state_record *sr)
return sr->curr.reg + preg; return sr->curr.reg + preg;
} }
/* An alias directive inside a region of length RLEN is interpreted to
mean that the region behaves exactly like the first RLEN
instructions at the aliased IP. RLEN=0 implies that the current
state matches exactly that of the aliased IP. */
static int
desc_alias (unw_dyn_op_t *op, struct cursor *c, struct ia64_state_record *sr)
{
struct ia64_state_record orig_sr = *sr;
int i, ret, when, rlen = sr->region_len;
unw_word_t new_ip;
when = MIN(sr->when_target, rlen - 1);
new_ip = op->val + ((when / 3) * 16 + (when % 3));
if ((ret = ia64_fetch_proc_info (c, new_ip, 1)) < 0)
return ret;
if ((ret = create_state_record_for (c, sr, new_ip)) < 0)
return ret;
sr->first_region = orig_sr.first_region;
sr->done = 0;
sr->any_spills |= orig_sr.any_spills;
sr->in_body = orig_sr.in_body;
sr->region_start = orig_sr.region_start;
sr->region_len = orig_sr.region_len;
if (sr->when_sp_restored != IA64_WHEN_NEVER)
sr->when_sp_restored = op->when + MIN (orig_sr.when_sp_restored, rlen - 1);
sr->epilogue_count = orig_sr.epilogue_count;
sr->when_target = orig_sr.when_target;
for (i = 0; i < IA64_NUM_PREGS; ++i)
if (sr->curr.reg[i].when != IA64_WHEN_NEVER)
sr->curr.reg[i].when = op->when + MIN (sr->curr.reg[i].when, rlen - 1);
ia64_free_state_record (sr);
sr->labeled_states = orig_sr.labeled_states;
sr->curr.next = orig_sr.curr.next;
return 0;
}
static inline int static inline int
parse_dynamic (struct cursor *c, struct ia64_state_record *sr) parse_dynamic (struct cursor *c, struct ia64_state_record *sr)
{ {
@ -751,10 +793,10 @@ parse_dynamic (struct cursor *c, struct ia64_state_record *sr)
unw_dyn_proc_info_t *proc = &di->u.pi; unw_dyn_proc_info_t *proc = &di->u.pi;
unw_dyn_region_info_t *r; unw_dyn_region_info_t *r;
struct ia64_reg_info *ri; struct ia64_reg_info *ri;
unw_word_t val, new_ip;
enum ia64_where where; enum ia64_where where;
unw_dyn_op_t *op;
int32_t when, len; int32_t when, len;
unw_dyn_op_t *op;
unw_word_t val;
int memory, ret; int memory, ret;
int8_t qp; int8_t qp;
@ -861,15 +903,8 @@ parse_dynamic (struct cursor *c, struct ia64_state_record *sr)
break; break;
case UNW_DYN_ALIAS: case UNW_DYN_ALIAS:
while (sr->curr.next) if ((ret = desc_alias (op, c, sr)) < 0)
pop (sr);
new_ip = op->val + ((sr->when_target / 3) * 16
+ (sr->when_target % 3));
ret = ia64_fetch_proc_info (c, new_ip, 1);
if (ret < 0)
return ret; return ret;
ia64_free_state_record (sr);
return create_state_record_for (c, sr, new_ip);
case UNW_DYN_STOP: case UNW_DYN_STOP:
goto end_of_ops; goto end_of_ops;