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don't create BIAT and UIAT sections when not requested

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This commit is contained in:
Nikita Smith
2025-06-25 10:53:23 -07:00
committed by Ryan Fleury
parent 9c93ee1579
commit f0a967a15d
5 changed files with 80 additions and 56 deletions
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src/linker/lnk.c
+6 -3
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@@ -1190,13 +1190,16 @@ THREAD_POOL_TASK_FUNC(lnk_obj_reloc_patcher)
for (U64 sect_idx = 0; sect_idx < obj_header.section_count_no_null; sect_idx += 1) {
COFF_SectionHeader *section_header = &section_table[sect_idx];
// was section discarded?
if (section_header->flags & COFF_SectionFlag_LnkRemove) {
continue;
}
// find section relocs
COFF_RelocInfo reloc_info = coff_reloc_info_from_section_header(obj->data, section_header);
COFF_Reloc *relocs = (COFF_Reloc *)(obj->data.str + reloc_info.array_off);
// apply relocs
for (U64 reloc_idx = 0; reloc_idx < reloc_info.count; reloc_idx += 1) {
COFF_Reloc *reloc = &relocs[reloc_idx];
@@ -3154,14 +3157,14 @@ lnk_build_win32_image(TP_Arena *arena, TP_Context *tp, LNK_Config *config, LNK_S
{
LNK_Section *didat_sect = lnk_section_table_search(sectab, str8_lit(".didat"), PE_IDATA_SECTION_FLAGS);
LNK_Symbol *null_import_desc = lnk_symbol_table_search(symtab, LNK_SymbolScope_Defined, str8_lit("__NULL_DELAY_IMPORT_DESCRIPTOR"));
LNK_Symbol *last_import_desc = lnk_symbol_table_searchf(symtab, LNK_SymbolScope_Defined, "\x7f%S_NULL_THUNK_DATA_DLA", lnk_get_image_name(config));
if (didat_sect && null_import_desc && last_import_desc) {
LNK_Symbol *last_null_thunk = lnk_symbol_table_searchf(symtab, LNK_SymbolScope_Defined, "\x7f%S_NULL_THUNK_DATA_DLA", lnk_get_image_name(config));
if (didat_sect && null_import_desc && last_null_thunk) {
COFF_ParsedSymbol null_import_desc_parsed = lnk_parsed_symbol_from_coff_symbol_idx(null_import_desc->u.defined.obj, null_import_desc->u.defined.symbol_idx);
LNK_SectionContrib *didat_first_contrib = lnk_get_first_section_contrib(didat_sect);
PE_DataDirectory *import_dir = str8_deserial_get_raw_ptr(image_data, pe.data_dir_range.min + sizeof(PE_DataDirectory)*PE_DataDirectoryIndex_DELAY_IMPORT, sizeof(PE_DataDirectory));
Assert(null_import_desc_parsed.section_number == didat_first_contrib->u.sect_idx+1);
Assert(null_import_desc_parsed.value >= didat_first_contrib->u.off);
import_dir->virt_off = image_section_table[didat_first_contrib->u.sect_idx]->voff + didat_first_contrib->u.off;
import_dir->virt_off = image_section_table[didat_first_contrib->u.sect_idx+1]->voff + didat_first_contrib->u.off;
import_dir->virt_size = null_import_desc_parsed.value - didat_first_contrib->u.off;
}
}