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make linker obj with COFF obj writer

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This commit is contained in:
Nikita Smith
2025-04-15 14:14:07 -07:00
committed by Ryan Fleury
parent c45088b546
commit e580b69180
2 changed files with 12 additions and 93 deletions
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src/linker/lnk.c
+11 -92
View File
@@ -752,8 +752,7 @@ lnk_obj_from_res_file_list(TP_Context *tp,
////////////////////////////////
internal String8
lnk_make_linker_coff_obj(TP_Context *tp,
Arena *arena,
lnk_make_linker_coff_obj(Arena *arena,
COFF_TimeStamp time_stamp,
COFF_MachineType machine,
String8 cwd_path,
@@ -763,30 +762,8 @@ lnk_make_linker_coff_obj(TP_Context *tp,
String8 obj_name)
{
Temp scratch = scratch_begin(&arena, 1);
TP_Arena *temp_tp_arena = push_array(scratch.arena, TP_Arena, 1);
temp_tp_arena->v = &scratch.arena;
temp_tp_arena->count = 1;
LNK_SymbolTable *symtab = lnk_symbol_table_init(temp_tp_arena);
LNK_SectionTable *sectab = lnk_section_table_alloc(0, 1, 1);
LNK_Section *header_sect = lnk_section_table_push(sectab, str8_lit(".coffhdr"), 0);
LNK_Section *debug_s_sect = lnk_section_table_push(sectab, str8_lit(".debug$S"), LNK_DEBUG_SECTION_FLAGS);
// TODO: remove! hack!
header_sect->emit_header = 0;
{
COFF_FileHeader *file_header = push_array(header_sect->arena, COFF_FileHeader, 1);
file_header->machine = machine;
file_header->section_count = 0;
file_header->time_stamp = time_stamp;
LNK_Chunk *file_header_chunk = lnk_section_push_chunk_raw(header_sect, header_sect->root, file_header, sizeof(*file_header), str8_zero());
lnk_section_push_reloc_undefined(header_sect, file_header_chunk, LNK_Reloc_ADDR_32, OffsetOf(COFF_FileHeader, section_count), str8_lit(LNK_COFF_SECT_HEADER_COUNT_SYMBOL_NAME), LNK_SymbolScopeFlag_Internal);
}
String8 debug_s_data = {0};
{
CV_SymbolList symbol_list = {0};
symbol_list.signature = CV_Signature_C13;
@@ -836,77 +813,19 @@ lnk_make_linker_coff_obj(TP_Context *tp,
B32 include_sig = 1;
String8List debug_s_data_list = cv_data_c13_from_debug_s(scratch.arena, &debug_s, include_sig);
// push debug info to section
String8 debug_s_data = str8_list_join(debug_s_sect->arena, &debug_s_data_list, 0);
lnk_section_push_chunk_data(debug_s_sect, debug_s_sect->root, debug_s_data, str8_zero());
debug_s_data = str8_list_join(scratch.arena, &debug_s_data_list, 0);
}
String8 obj;
{
// register section symbols (after this point don't push new sections)
for (LNK_SectionNode *sect_node = sectab->list.first; sect_node != NULL; sect_node = sect_node->next) {
LNK_Section *sect = &sect_node->data;
lnk_symbol_table_push_defined_chunk(symtab, sect->name, LNK_DefinedSymbolVisibility_Internal, 0, sect->root, 0, 0, 0);
}
LNK_Chunk *coff_section_header_array_chunk = lnk_section_push_chunk_list(header_sect, header_sect->root, str8_zero());
for (LNK_SectionNode *sect_node = sectab->list.first; sect_node != NULL; sect_node = sect_node->next) {
if (sect_node == sectab->null_sect) continue;
if (!sect_node->data.emit_header) continue;
LNK_Section *sect = &sect_node->data;
// init section header
COFF_SectionHeader *coff_sect_header = push_array(header_sect->arena, COFF_SectionHeader, 1);
Assert(sect->name.size <= sizeof(coff_sect_header->name));
MemoryCopy(&coff_sect_header->name[0], sect->name.str, sect->name.size);
coff_sect_header->flags = sect->flags;
coff_sect_header->vsize = 0; // ignored
coff_sect_header->voff = 0; // ignored
coff_sect_header->fsize = 0; // relocated
coff_sect_header->foff = 0; // relocated
coff_sect_header->relocs_foff = 0; // relocated
coff_sect_header->lines_foff = 0; // obsolete
coff_sect_header->line_count = 0; // obsolete
coff_sect_header->reloc_count = 0; // relocated
// push section header chunk
String8 sort_index = lnk_make_section_sort_index(header_sect->arena, str8_zero(), 0, sect->isect);
LNK_Chunk *coff_sect_header_chunk = lnk_section_push_chunk_raw(header_sect, coff_section_header_array_chunk, coff_sect_header, sizeof(*coff_sect_header), sort_index);
lnk_chunk_set_debugf(header_sect->arena, coff_sect_header_chunk, "%S", sect->name);
// emit relocs for reloc fields
if (sect->reloc_list.count) {
String8 coff_reloc_symbol_name = push_str8f(scratch.arena, "%S.coff_reloc[]", sect->name);
String8 coff_reloc_count_symbol_name = push_str8f(scratch.arena, "%S.coff_reloc[].count", sect->name);
lnk_section_push_reloc_undefined(header_sect, coff_sect_header_chunk, LNK_Reloc_FILE_OFF_32, OffsetOf(COFF_SectionHeader, relocs_foff), coff_reloc_symbol_name, LNK_SymbolScopeFlag_Internal);
lnk_section_push_reloc_undefined(header_sect, coff_sect_header_chunk, LNK_Reloc_ADDR_32, OffsetOf(COFF_SectionHeader, reloc_count), coff_reloc_count_symbol_name, LNK_SymbolScopeFlag_Internal);
}
// emit relocs for file fields
if (~sect->flags & COFF_SectionFlag_CntUninitializedData) {
LNK_Symbol *sect_symbol = lnk_symbol_table_search(symtab, LNK_SymbolScopeFlag_Internal, sect->name);
lnk_section_push_reloc(header_sect, coff_sect_header_chunk, LNK_Reloc_CHUNK_SIZE_FILE_32, OffsetOf(COFF_SectionHeader, fsize), sect_symbol);
lnk_section_push_reloc(header_sect, coff_sect_header_chunk, LNK_Reloc_FILE_OFF_32, OffsetOf(COFF_SectionHeader, foff), sect_symbol);
}
}
// push section header count symbol
U64 symbol_count = coff_section_header_array_chunk->u.list->count;
LNK_Symbol *coff_section_header_count_symbol = lnk_make_defined_symbol_va(symtab->arena->v[0], str8_lit(LNK_COFF_SECT_HEADER_COUNT_SYMBOL_NAME), LNK_DefinedSymbolVisibility_Internal, 0, symbol_count);
lnk_symbol_table_push(symtab, coff_section_header_count_symbol);
COFF_ObjWriter *obj_writer = coff_obj_writer_alloc(time_stamp, machine);
coff_obj_writer_push_section(obj_writer, str8_lit(".debug$S"), LNK_DEBUG_SECTION_FLAGS, debug_s_data);
obj = coff_obj_writer_serialize(arena, obj_writer);
coff_obj_writer_release(&obj_writer);
}
lnk_section_table_assign_indices(sectab);
lnk_section_table_build_data(tp, sectab, machine);
lnk_section_table_assign_file_offsets(sectab);
String8 coff_data = lnk_section_table_serialize(tp, arena, sectab, machine);
LNK_Section **sect_id_map = lnk_sect_id_map_from_section_table(scratch.arena, sectab);
lnk_patch_relocs_linker(tp, symtab, sectab, sect_id_map, coff_data, 0);
lnk_section_table_release(&sectab);
scratch_end(scratch);
return coff_data;
return obj;
}
////////////////////////////////
@@ -3816,7 +3735,7 @@ lnk_run(int argc, char **argv)
StringJoin join = { str8_lit_comp(""), str8_lit_comp(" "), str8_lit_comp("") };
String8 raw_cmd_line = str8_list_join(scratch.arena, &config->raw_cmd_line, &join);
String8 obj_data = lnk_make_linker_coff_obj(tp, scratch.arena, config->time_stamp, config->machine, config->work_dir, config->image_name, config->pdb_name, raw_cmd_line, obj_name);
String8 obj_data = lnk_make_linker_coff_obj(scratch.arena, config->time_stamp, config->machine, config->work_dir, config->image_name, config->pdb_name, raw_cmd_line, obj_name);
LNK_InputObj *input = lnk_input_obj_list_push(scratch.arena, &input_obj_list);
input->dedup_id = obj_name;
src/linker/lnk.h
+1 -1
View File
@@ -272,7 +272,7 @@ internal String8 lnk_obj_from_res_file_list(TP_Context *tp, Arena *arena, LNK_Se
////////////////////////////////
// Debug
internal String8 lnk_make_linker_coff_obj(TP_Context *tp, Arena *arena, COFF_TimeStamp time_stamp, COFF_MachineType machine, String8 cwd_path, String8 exe_path, String8 pdb_path, String8 cmd_line, String8 obj_name);
internal String8 lnk_make_linker_coff_obj(Arena *arena, COFF_TimeStamp time_stamp, COFF_MachineType machine, String8 cwd_path, String8 exe_path, String8 pdb_path, String8 cmd_line, String8 obj_name);
////////////////////////////////
// Win32 Image Helpers