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Diffstat (limited to 'gdb/dwarf2loc.c')
-rw-r--r--gdb/dwarf2loc.c77
1 files changed, 46 insertions, 31 deletions
diff --git a/gdb/dwarf2loc.c b/gdb/dwarf2loc.c
index 5edcd2b..5f63bd7 100644
--- a/gdb/dwarf2loc.c
+++ b/gdb/dwarf2loc.c
@@ -948,16 +948,34 @@ call_site_find_chain (struct gdbarch *gdbarch, CORE_ADDR caller_pc,
return retval;
}
-/* Fetch call_site_parameter from caller matching the parameters. FRAME is for
- callee. See DWARF_REG and FB_OFFSET description at struct
- dwarf_expr_context_funcs->push_dwarf_reg_entry_value.
+/* Return 1 if KIND and KIND_U match PARAMETER. Return 0 otherwise. */
+
+static int
+call_site_parameter_matches (struct call_site_parameter *parameter,
+ enum call_site_parameter_kind kind,
+ union call_site_parameter_u kind_u)
+{
+ if (kind == parameter->kind)
+ switch (kind)
+ {
+ case CALL_SITE_PARAMETER_DWARF_REG:
+ return kind_u.dwarf_reg == parameter->u.dwarf_reg;
+ case CALL_SITE_PARAMETER_FB_OFFSET:
+ return kind_u.fb_offset == parameter->u.fb_offset;
+ }
+ return 0;
+}
+
+/* Fetch call_site_parameter from caller matching KIND and KIND_U.
+ FRAME is for callee.
Function always returns non-NULL, it throws NO_ENTRY_VALUE_ERROR
otherwise. */
static struct call_site_parameter *
-dwarf_expr_reg_to_entry_parameter (struct frame_info *frame, int dwarf_reg,
- CORE_ADDR fb_offset,
+dwarf_expr_reg_to_entry_parameter (struct frame_info *frame,
+ enum call_site_parameter_kind kind,
+ union call_site_parameter_u kind_u,
struct dwarf2_per_cu_data **per_cu_return)
{
CORE_ADDR func_addr = get_frame_func (frame);
@@ -1020,12 +1038,7 @@ dwarf_expr_reg_to_entry_parameter (struct frame_info *frame, int dwarf_reg,
for (iparams = 0; iparams < call_site->parameter_count; iparams++)
{
parameter = &call_site->parameter[iparams];
- if (parameter->dwarf_reg == -1 && dwarf_reg == -1)
- {
- if (parameter->fb_offset == fb_offset)
- break;
- }
- else if (parameter->dwarf_reg == dwarf_reg)
+ if (call_site_parameter_matches (parameter, kind, kind_u))
break;
}
if (iparams == call_site->parameter_count)
@@ -1082,17 +1095,17 @@ dwarf_entry_parameter_to_value (struct call_site_parameter *parameter,
return dwarf2_evaluate_loc_desc (type, caller_frame, data, size + 1, per_cu);
}
-/* Execute call_site_parameter's DWARF block matching DEREF_SIZE for caller of
- the CTX's frame. CTX must be of dwarf_expr_ctx_funcs kind. See DWARF_REG
- and FB_OFFSET description at struct
- dwarf_expr_context_funcs->push_dwarf_reg_entry_value.
+/* Execute DWARF block of call_site_parameter which matches KIND and KIND_U.
+ Choose DEREF_SIZE value of that parameter. Search caller of the CTX's
+ frame. CTX must be of dwarf_expr_ctx_funcs kind.
The CTX caller can be from a different CU - per_cu_dwarf_call implementation
can be more simple as it does not support cross-CU DWARF executions. */
static void
dwarf_expr_push_dwarf_reg_entry_value (struct dwarf_expr_context *ctx,
- int dwarf_reg, CORE_ADDR fb_offset,
+ enum call_site_parameter_kind kind,
+ union call_site_parameter_u kind_u,
int deref_size)
{
struct dwarf_expr_baton *debaton;
@@ -1109,7 +1122,7 @@ dwarf_expr_push_dwarf_reg_entry_value (struct dwarf_expr_context *ctx,
frame = debaton->frame;
caller_frame = get_prev_frame (frame);
- parameter = dwarf_expr_reg_to_entry_parameter (frame, dwarf_reg, fb_offset,
+ parameter = dwarf_expr_reg_to_entry_parameter (frame, kind, kind_u,
&caller_per_cu);
data_src = deref_size == -1 ? parameter->value : parameter->data_value;
size = deref_size == -1 ? parameter->value_size : parameter->data_value_size;
@@ -1206,17 +1219,17 @@ static const struct lval_funcs entry_data_value_funcs =
entry_data_value_free_closure
};
-/* Read parameter of TYPE at (callee) FRAME's function entry. DWARF_REG and
- FB_OFFSET are used to match DW_AT_location at the caller's
- DW_TAG_GNU_call_site_parameter. See DWARF_REG and FB_OFFSET description at
- struct dwarf_expr_context_funcs->push_dwarf_reg_entry_value.
+/* Read parameter of TYPE at (callee) FRAME's function entry. KIND and KIND_U
+ are used to match DW_AT_location at the caller's
+ DW_TAG_GNU_call_site_parameter.
Function always returns non-NULL value. It throws NO_ENTRY_VALUE_ERROR if it
cannot resolve the parameter for any reason. */
static struct value *
value_of_dwarf_reg_entry (struct type *type, struct frame_info *frame,
- int dwarf_reg, CORE_ADDR fb_offset)
+ enum call_site_parameter_kind kind,
+ union call_site_parameter_u kind_u)
{
struct type *checked_type = check_typedef (type);
struct type *target_type = TYPE_TARGET_TYPE (checked_type);
@@ -1226,7 +1239,7 @@ value_of_dwarf_reg_entry (struct type *type, struct frame_info *frame,
struct dwarf2_per_cu_data *caller_per_cu;
CORE_ADDR addr;
- parameter = dwarf_expr_reg_to_entry_parameter (frame, dwarf_reg, fb_offset,
+ parameter = dwarf_expr_reg_to_entry_parameter (frame, kind, kind_u,
&caller_per_cu);
outer_val = dwarf_entry_parameter_to_value (parameter, -1 /* deref_size */,
@@ -1278,15 +1291,16 @@ static struct value *
value_of_dwarf_block_entry (struct type *type, struct frame_info *frame,
const gdb_byte *block, size_t block_len)
{
- int dwarf_reg;
- CORE_ADDR fb_offset;
+ union call_site_parameter_u kind_u;
- dwarf_reg = dwarf_block_to_dwarf_reg (block, block + block_len);
- if (dwarf_reg != -1)
- return value_of_dwarf_reg_entry (type, frame, dwarf_reg, 0 /* unused */);
+ kind_u.dwarf_reg = dwarf_block_to_dwarf_reg (block, block + block_len);
+ if (kind_u.dwarf_reg != -1)
+ return value_of_dwarf_reg_entry (type, frame, CALL_SITE_PARAMETER_DWARF_REG,
+ kind_u);
- if (dwarf_block_to_fb_offset (block, block + block_len, &fb_offset))
- return value_of_dwarf_reg_entry (type, frame, -1, fb_offset);
+ if (dwarf_block_to_fb_offset (block, block + block_len, &kind_u.fb_offset))
+ return value_of_dwarf_reg_entry (type, frame, CALL_SITE_PARAMETER_FB_OFFSET,
+ kind_u);
/* This can normally happen - throw NO_ENTRY_VALUE_ERROR to get the message
suppressed during normal operation. The expression can be arbitrary if
@@ -2377,7 +2391,8 @@ needs_frame_dwarf_call (struct dwarf_expr_context *ctx, cu_offset die_offset)
static void
needs_dwarf_reg_entry_value (struct dwarf_expr_context *ctx,
- int dwarf_reg, CORE_ADDR fb_offset, int deref_size)
+ enum call_site_parameter_kind kind,
+ union call_site_parameter_u kind_u, int deref_size)
{
struct needs_frame_baton *nf_baton = ctx->baton;
generated by cgit v1.1 at 2024-11-23 18:56:30 +0000