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dbghelp/dwarf: Added support for OP_call_frame_cfa. 

Signed-off-by: Eric Pouech <eric.pouech@gmail.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Eric Pouech 2021-09-26 14:47:01 +02:00 committed by Alexandre Julliard
parent 1ecd66200d
commit d8c9171c78
1 changed files with 50 additions and 2 deletions
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52
dlls/dbghelp/dwarf.c
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@ -234,6 +234,7 @@ struct dwarf2_module_info_s
#define loc_dwarf2_location_list (loc_user + 0)
#define loc_dwarf2_block (loc_user + 1)
#define loc_dwarf2_frame_cfa (loc_user + 2)
/* forward declarations */
static struct symt* dwarf2_parse_enumeration_type(dwarf2_debug_info_t* entry);
@ -1085,8 +1086,13 @@ static BOOL dwarf2_compute_location_attr(dwarf2_parse_context_t* ctx,
}
/* assume we have a block form */
if (xloc.u.block.size)
if (dw == DW_AT_frame_base && xloc.u.block.size == 1 && *xloc.u.block.ptr == DW_OP_call_frame_cfa)
{
loc->kind = loc_dwarf2_frame_cfa;
loc->reg = Wine_DW_no_register;
loc->offset = 0;
}
else if (xloc.u.block.size)
{
dwarf2_traverse_context_t lctx;
enum location_error err;
@ -2818,6 +2824,8 @@ static const dwarf2_cuhead_t* get_cuhead_from_func(const struct symt_function* f
return NULL;
}
static BOOL compute_call_frame_cfa(struct module* module, ULONG_PTR ip, struct location* frame);
static enum location_error loc_compute_frame(struct process* pcs,
const struct module_format* modfmt,
const struct symt_function* func,
@ -2858,6 +2866,9 @@ static enum location_error loc_compute_frame(struct process* pcs,
return loc_err_too_complex;
}
break;
case loc_dwarf2_frame_cfa:
if (!compute_call_frame_cfa(modfmt->module, ip + ((struct symt_compiland*)func->container)->address, frame)) return loc_err_internal;
break;
default:
WARN("Unsupported frame kind %d\n", pframe->kind);
return loc_err_internal;
@ -3647,6 +3658,43 @@ BOOL dwarf2_virtual_unwind(struct cpu_stack_walk *csw, ULONG_PTR ip,
return TRUE;
}
static BOOL compute_call_frame_cfa(struct module* module, ULONG_PTR ip, struct location* frame)
{
struct frame_info info;
if (!dwarf2_fetch_frame_info(module, dbghelp_current_cpu, ip, &info)) return FALSE;
/* beginning of function, or no available dwarf information ? */
if (ip == info.ip || info.state.rules[info.retaddr_reg] == RULE_UNSET)
{
/* fake the default unwinder */
frame->kind = loc_regrel;
frame->reg = dbghelp_current_cpu->frame_regno;
frame->offset = dbghelp_current_cpu->word_size; /* FIXME stack direction */
}
else
{
/* we expect to translate the call_frame_cfa into a regrel location...
* that should cover most of the cases
*/
switch (info.state.cfa_rule)
{
case RULE_EXPRESSION:
FIXME("Too complex expression for frame_CFA resolution (RULE_EXPRESSION)\n");
break;
case RULE_VAL_EXPRESSION:
FIXME("Too complex expression for frame_CFA resolution (RULE_VAL_EXPRESSION)\n");
break;
default:
frame->kind = loc_regrel;
frame->reg = dbghelp_current_cpu->map_dwarf_register(info.state.cfa_reg, module, TRUE);
frame->offset = info.state.cfa_offset;
break;
}
}
return TRUE;
}
static void dwarf2_location_compute(struct process* pcs,
const struct module_format* modfmt,
const struct symt_function* func,