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Output CodeView type information for references

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Translates DW_TAG_reference_type DIEs into LF_POINTER types.

gcc/
	* dwarf2codeview.cc (get_type_num_reference_type): New function.
	(get_type_num_array_type): Add DW_TAG_reference_type to switch.
	(get_type_num): Handle DW_TAG_reference_type DIEs.
	* dwarf2codeview.h (CV_PTR_MODE_LVREF): Define.
This commit is contained in:
Mark Harmstone 2024-07-20 20:12:30 +01:00
parent 806927111c
commit 7341607544
2 changed files with 45 additions and 0 deletions
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44
gcc/dwarf2codeview.cc
View file

@ -2293,6 +2293,45 @@ get_type_num_pointer_type (dw_die_ref type, bool in_struct)
return ct->num;
}
/* Process a DW_TAG_reference_type DIE, add a new LF_POINTER type, and return
its number. */
static uint32_t
get_type_num_reference_type (dw_die_ref type, bool in_struct)
{
uint32_t base_type_num, byte_size;
dw_die_ref base_type;
codeview_custom_type *ct;
byte_size = get_AT_unsigned (type, DW_AT_byte_size);
if (byte_size != 4 && byte_size != 8)
return 0;
base_type = get_AT_ref (type, DW_AT_type);
base_type_num = get_type_num (base_type, in_struct, false);
if (base_type_num == 0)
return 0;
ct = (codeview_custom_type *) xmalloc (sizeof (codeview_custom_type));
ct->next = NULL;
ct->kind = LF_POINTER;
ct->lf_pointer.base_type = base_type_num;
ct->lf_pointer.attributes = CV_PTR_MODE_LVREF;
if (byte_size == 4)
ct->lf_pointer.attributes |= CV_PTR_NEAR32;
else
ct->lf_pointer.attributes |= CV_PTR_64;
ct->lf_pointer.attributes |= byte_size << 13;
add_custom_type (ct);
return ct->num;
}
/* Process a DW_TAG_const_type DIE, adding an LF_MODIFIER type and returning
its number. */
@ -3024,6 +3063,7 @@ get_type_num_array_type (dw_die_ref type, bool in_struct)
case DW_TAG_class_type:
case DW_TAG_union_type:
case DW_TAG_pointer_type:
case DW_TAG_reference_type:
size = get_AT_unsigned (t, DW_AT_byte_size);
break;
@ -3151,6 +3191,10 @@ get_type_num (dw_die_ref type, bool in_struct, bool no_fwd_ref)
num = get_type_num_pointer_type (type, in_struct);
break;
case DW_TAG_reference_type:
num = get_type_num_reference_type (type, in_struct);
break;
case DW_TAG_const_type:
num = get_type_num_const_type (type, in_struct);
break;

1
gcc/dwarf2codeview.h
View file

@ -55,6 +55,7 @@ along with GCC; see the file COPYING3. If not see
/* LF_POINTER attributes. */
#define CV_PTR_NEAR32 0x0a
#define CV_PTR_64 0x0c
#define CV_PTR_MODE_LVREF 0x20
/* LF_MODIFIER values. */
#define MOD_const 0x1