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handle COMDAT Associative selection

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This commit is contained in:
Nikita Smith
2025-06-25 10:53:23 -07:00
committed by Ryan Fleury
parent 69d4e31b15
commit bf25b5b249
4 changed files with 122 additions and 9 deletions
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src/linker/lnk.c
+38
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@@ -2201,6 +2201,44 @@ lnk_build_win32_image(TP_Arena *arena, TP_Context *tp, LNK_Config *config, LNK_S
U64 objs_count = obj_list.count;
LNK_Obj **objs = lnk_obj_arr_from_list(scratch.arena, obj_list);
ProfBegin("Remove Associatives");
{
for (U64 obj_idx = 0; obj_idx < objs_count; obj_idx += 1) {
LNK_Obj *obj = objs[obj_idx];
String8 string_table = str8_substr(obj->data, obj->header.string_table_range);
String8 symbol_table = str8_substr(obj->data, obj->header.symbol_table_range);
for (U64 sect_idx = 0; sect_idx < obj->header.section_count_no_null; sect_idx += 1) {
// find associate section head section index
U32 head_sect_idx = max_U32;
for (U64 current_sect_idx = sect_idx;;) {
U32 symbol_idx = obj->comdats[current_sect_idx];
if (symbol_idx == max_U32) {
break;
}
COFF_ParsedSymbol symbol = coff_parse_symbol(obj->header, string_table, symbol_table, symbol_idx);
COFF_ComdatSelectType selection = COFF_ComdatSelect_Null;
U32 section_number = 0;
coff_parse_secdef(symbol, obj->header.is_big_obj, &selection, &section_number, 0, 0);
if (selection != COFF_ComdatSelect_Associative) {
head_sect_idx = current_sect_idx;
break;
}
current_sect_idx = section_number-1;
}
if (head_sect_idx != max_U32) {
// flag current section with remove if head section was removed
COFF_SectionHeader *head_sect_header = lnk_coff_section_header_from_section_number(obj, head_sect_idx+1);
COFF_SectionHeader *curr_sect_header = lnk_coff_section_header_from_section_number(obj, sect_idx+1);
curr_sect_header->flags |= (head_sect_header->flags & COFF_SectionFlag_LnkRemove);
}
}
}
}
ProfEnd();
{
ProfBegin("Define And Count Sections");
Temp temp = temp_begin(scratch.arena);