mirror of
https://github.com/Ed94/raddebugger.git
synced 2026-06-26 05:25:00 -07:00
draft symbol table fixups to prepare for refactoring symbol table patching step
This commit is contained in:
Nikita Smith
committed by
Ryan Fleury
Ryan Fleury
parent
08f2b749e8
commit
17ca83697b
+275
-49
@@ -2223,6 +2223,227 @@ lnk_build_link_context(TP_Context *tp, TP_Arena *tp_arena, LNK_Config *config)
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#undef state_list_pop
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}
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internal LNK_SymbolTableFixup *
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lnk_symbol_table_fixup_list_push(Arena *arena, LNK_SymbolTableFixupList *list)
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{
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LNK_SymbolTableFixupNode *node = push_array(arena, LNK_SymbolTableFixupNode, 1);
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SLLQueuePush(list->first, list->last, node);
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list->count += 1;
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return &node->data;
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}
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internal LNK_SymbolTableFixup *
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lnk_array_from_symbol_table_fixup_list(Arena *arena, LNK_SymbolTableFixupList list)
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{
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LNK_SymbolTableFixup *result = push_array(arena, LNK_SymbolTableFixup, list.count);
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U64 idx = 0;
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for (LNK_SymbolTableFixupNode *n = list.first; n != 0; n = n->next, idx += 1) {
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result[idx] = n->data;
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}
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return result;
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}
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/*
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internal
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THREAD_POOL_TASK_FUNC(lnk_gather_symtab_fixups_task)
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{
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Temp scratch = scratch_begin(&arena, 1);
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LNK_BuildImageTask *task = raw_task;
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U64 obj_idx = task_id;
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LNK_Obj *obj = task->objs[task_id];
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ProfBeginV("%S", obj->path);
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ProfBegin("Build Symlinks");
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LNK_Symbol **symlinks = push_array(scratch.arena, LNK_Symbol *, obj->header.section_count_no_null+1);
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{
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COFF_ParsedSymbol symbol;
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for (U64 symbol_idx = 0; symbol_idx < obj->header.symbol_count; symbol_idx += (1 + symbol.aux_symbol_count)) {
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symbol = lnk_parsed_symbol_from_coff_symbol_idx(obj, symbol_idx);
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COFF_SymbolValueInterpType interp = coff_interp_symbol(symbol.section_number, symbol.value, symbol.storage_class);
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if (interp == COFF_SymbolValueInterp_Regular && symbol.aux_symbol_count == 0 && symbol.storage_class == COFF_SymStorageClass_External) {
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COFF_SectionHeader *sect_header = lnk_coff_section_header_from_section_number(obj, symbol.section_number);
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if (sect_header->flags & COFF_SectionFlag_LnkCOMDAT) {
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if (symlinks[symbol.section_number] == 0 || symbol.value == 0) {
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symlinks[symbol.section_number] = lnk_symbol_table_search(task->symtab, LNK_SymbolScope_Defined, symbol.name);
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}
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}
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}
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}
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}
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ProfEnd();
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struct LookupLocation {
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struct LookupLocation *next;
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LNK_Obj *obj;
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U64 symbol_idx;
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};
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struct LookupLocation *lookup_first = 0;
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struct LookupLocation *lookup_last = 0;
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struct LookupLocation *lookup_free_list = 0;
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HashTable *visited_symbols_ht = hash_table_init(scratch.arena, 32);
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LNK_SymbolTableFixupList fixups = {0};
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{
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COFF_ParsedSymbol symbol;
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for (U64 symbol_idx = 0; symbol_idx < obj->header.symbol_count; symbol_idx += (1 + symbol.aux_symbol_count)) {
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symbol = lnk_parsed_symbol_from_coff_symbol_idx(obj, symbol_idx);
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COFF_SymbolValueInterpType interp = coff_interp_symbol(symbol.section_number, symbol.value, symbol.storage_class);
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if (interp == COFF_SymbolValueInterp_Regular) {
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LNK_Symbol *symlink = symlinks[symbol.section_number];
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if (symlink && symlink->u.defined.obj != obj) {
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if (symbol.storage_class == COFF_SymStorageClass_External) {
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// COMDAT leader may be at a different offset, so update this symbol with leader's offset
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LNK_SymbolTableFixup *fixup = lnk_symbol_table_fixup_list_push(scratch.arena, &fixups);
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fixup->idx = symbol_idx;
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fixup->obj_idx = symlink->u.defined.obj->input_idx;
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fixup->obj_symbol_idx = symlink->u.defined.symbol_idx;
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} else {
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// COMDAT section may have static symbols which are now invalid to relocate against
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LNK_SymbolTableFixup *fixup = lnk_symbol_table_fixup_list_push(scratch.arena, &fixups);
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fixup->idx = symbol_idx;
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fixup->obj_idx = max_U32;
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fixup->obj_symbol_idx = max_U32;
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task->u.patch_symtabs.was_symbol_patched[obj_idx][symbol_idx] = 1;
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}
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}
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} else if (interp == COFF_SymbolValueInterp_Common) {
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LNK_Symbol *defn = lnk_symbol_table_search(task->symtab, LNK_SymbolScope_Defined, symbol.name);
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if (defn) {
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LNK_SymbolTableFixup *fixup = lnk_symbol_table_fixup_list_push(scratch.arena, &fixups);
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fixup->idx = symbol_idx;
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fixup->obj_idx = defn->u.defined.obj->input_idx;
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fixup->obj_symbol_idx = defn->u.defined.symbol_idx;
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}
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} else if (interp == COFF_SymbolValueInterp_Abs) {
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if (symbol.storage_class == COFF_SymStorageClass_External) {
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LNK_Symbol *defn = lnk_symbol_table_search(task->symtab, LNK_SymbolScope_Defined, symbol.name);
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if (defn == 0) {
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continue;
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}
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if (defn->u.defined.obj == obj && defn->u.defined.symbol_idx == symbol_idx) {
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continue;
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}
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LNK_SymbolTableFixup *fixup = lnk_symbol_table_fixup_list_push(scratch.arena, &fixups);
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fixup->idx = symbol_idx;
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fixup->obj_idx = defn->u.defined.obj->input_idx;
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fixup->obj_symbol_idx = defn->u.defined.symbol_idx;
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}
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} else if (interp == COFF_SymbolValueInterp_Undefined) {
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if (symbol.storage_class == COFF_SymStorageClass_External) {
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LNK_Symbol *defn = lnk_symbol_table_search(task->symtab, LNK_SymbolScope_Defined, symbol.name);
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if (defn) {
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LNK_SymbolTableFixup *fixup = lnk_symbol_table_fixup_list_push(scratch.arena, &fixups);
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fixup->idx = symbol_idx;
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fixup->obj_idx = defn->u.defined.obj->input_idx;
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fixup->obj_symbol_idx = defn->u.defined.symbol_idx;
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}
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}
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} else if (interp == COFF_SymbolValueInterp_Weak) {
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String8 lookup_name = symbol.name;
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LNK_Obj *lookup_obj = obj;
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U64 lookup_symbol_idx = symbol_idx;
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for (;;) {
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LNK_Symbol *defn = lnk_symbol_table_search(task->symtab, LNK_SymbolScope_Defined, lookup_name);
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if (defn == 0) {
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break;
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}
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// not external symbol -- symbol resolved
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COFF_ParsedSymbol defn_parsed = lnk_parsed_symbol_from_coff_symbol_idx(defn->u.defined.obj, defn->u.defined.symbol_idx);
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if (defn_parsed.storage_class != COFF_SymStorageClass_WeakExternal) {
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LNK_SymbolTableFixup *fixup = lnk_symbol_table_fixup_list_push(scratch.arena, &fixups);
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fixup->idx = symbol_idx;
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fixup->obj_idx = defn->u.defined.obj->input_idx;
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fixup->obj_symbol_idx = defn->u.defined.symbol_idx;
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break;
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}
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// check against cyclic refs
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struct LookupLocation *was_visited = 0;
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hash_table_search_string_raw(visited_symbols_ht, lookup_name, &was_visited);
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if (was_visited != 0) {
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Temp temp = temp_begin(scratch.arena);
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String8List list = {0};
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for (struct LookupLocation *l = lookup_first; l != 0; l = l->next) {
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COFF_ParsedSymbol loc_symbol = lnk_parsed_symbol_from_coff_symbol_idx(l->obj, l->symbol_idx);
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str8_list_pushf(temp.arena, &list, "\t%S Symbol %S (No.%#llx) =>", l->obj->path, loc_symbol.name, l->symbol_idx);
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}
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{
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COFF_ParsedSymbol loc_symbol = lnk_parsed_symbol_from_coff_symbol_idx(was_visited->obj, was_visited->symbol_idx);
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str8_list_pushf(temp.arena, &list, "\t%S Symbol %S (No.%#llx)", was_visited->obj->path, loc_symbol.name, was_visited->symbol_idx);
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}
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String8 loc_string = str8_list_join(temp.arena, &list, &(StringJoin){.sep = str8_lit("\n") });
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lnk_error_obj(LNK_Error_WeakCycle, obj, "unable to resolve cyclic symbol %S; ref chain:\n%S", symbol.name, loc_string);
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temp_end(temp);
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break;
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}
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struct LookupLocation *loc = lookup_free_list;
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if (lookup_free_list) {
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SLLStackPop(lookup_free_list);
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} else {
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loc = push_array(scratch.arena, struct LookupLocation, 1);
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}
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loc->obj = lookup_obj;
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loc->symbol_idx = symbol_idx;
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SLLQueuePush(lookup_first, lookup_last, loc);
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hash_table_push_string_raw(scratch.arena, visited_symbols_ht, lookup_name, loc);
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// fallback to weak tag for definition
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COFF_SymbolWeakExt *weak_ext = coff_parse_weak_tag(defn_parsed, defn->u.defined.obj->header.is_big_obj);
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COFF_ParsedSymbol parsed_tag = lnk_parsed_symbol_from_coff_symbol_idx(defn->u.defined.obj, weak_ext->tag_index);
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lookup_name = parsed_tag.name;
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lookup_obj = defn->u.defined.obj;
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lookup_symbol_idx = weak_ext->tag_index;
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}
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}
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}
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}
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task->obj_symtab_fixups[obj_idx] = lnk_array_from_symbol_table_fixup_list(arena, fixups);
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ProfEnd();
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scratch_end(scratch);
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}
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internal void
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lnk_gc_sections(U64 objs_count, LNK_Obj **objs, LNK_SymbolTableFixupArray *objs_fixups, PairU32 root)
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{
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for (;;) {
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LNK_Obj *obj = objs[root.v0];
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COFF_SectionHeader *section_header = lnk_coff_section_header_from_section_number(obj, root.v1);
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COFF_RelocInfo reloc_info = coff_reloc_info_from_section_header(obj->data, section_header);
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COFF_Reloc *relocs = str8_deserial_get_raw_ptr(obj->data, reloc_info.array_off, sizeof(*relocs)*reloc_info.count);
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LNK_SymbolTableFixupArray *fixups = objs_fixups[root.v0];
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for (U64 reloc_idx = 0; reloc_idx < reloc_info.count; reloc_idx += 1) {
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COFF_Reloc *reloc = &relocs[reloc_idx];
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LNK_SymbolTableFixup *fixup = lnk_bsearch_symbol_table_fixup_array(fixups, reloc->isymbol);
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LNK_Obj *symbol_obj;
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U64 symbol_idx;
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if (fixup == 0) {
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symbol_obj = obj;
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symbol_idx = reloc->isymbol;
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} else {
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symbol_obj = objs[fixup->obj_idx];
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symbol_idx = fixup->obj_symbol_idx;
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}
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COFF_ParsedSymbol symbol = lnk_parsed_symbol_from_coff_symbol_idx(symbol_obj, symbol_idx);
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COFF_SectionHeader *symbol_section_header = ;
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}
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}
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}
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*/
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internal
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THREAD_POOL_TASK_FUNC(lnk_remove_associative_sections_task)
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{
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@@ -2379,7 +2600,7 @@ THREAD_POOL_TASK_FUNC(lnk_flag_debug_symbols_task)
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}
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internal
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THREAD_POOL_TASK_FUNC(lnk_set_comdat_leaders_task)
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THREAD_POOL_TASK_FUNC(lnk_patch_comdat_leaders_task)
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{
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Temp scratch = scratch_begin(&arena, 1);
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@@ -2535,6 +2756,41 @@ THREAD_POOL_TASK_FUNC(lnk_patch_common_block_leaders_task)
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ProfEnd();
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}
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internal
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THREAD_POOL_TASK_FUNC(lnk_patch_common_block_symbols_task)
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{
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LNK_BuildImageTask *task = raw_task;
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U64 obj_idx = task_id;
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LNK_Obj *obj = task->objs[obj_idx];
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ProfBeginV("Patch Common Block Symbols [%S]", obj->path);
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COFF_ParsedSymbol symbol;
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for (U64 symbol_idx = 0; symbol_idx < obj->header.symbol_count; symbol_idx += (1 + symbol.aux_symbol_count)) {
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symbol = lnk_parsed_symbol_from_coff_symbol_idx(obj, symbol_idx);
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COFF_SymbolValueInterpType interp = coff_interp_symbol(symbol.section_number, symbol.value, symbol.storage_class);
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if (interp == COFF_SymbolValueInterp_Common) {
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LNK_Symbol *defn = lnk_symbol_table_search(task->symtab, LNK_SymbolScope_Defined, symbol.name);
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COFF_ParsedSymbol defn_parsed = lnk_parsed_symbol_from_coff_symbol_idx(defn->u.defined.obj, defn->u.defined.symbol_idx);
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Assert(coff_interp_symbol(defn_parsed.section_number, defn_parsed.value, defn_parsed.storage_class) == COFF_SymbolValueInterp_Regular);
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if (defn) {
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if (obj->header.is_big_obj) {
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COFF_Symbol32 *symbol32 = symbol.raw_symbol;
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symbol32->section_number = defn_parsed.section_number;
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symbol32->value = safe_cast_u32(defn_parsed.value);
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symbol32->storage_class = COFF_SymStorageClass_Static;
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} else {
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COFF_Symbol16 *symbol16 = symbol.raw_symbol;
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symbol16->section_number = safe_cast_u16(defn_parsed.section_number);
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symbol16->value = safe_cast_u32(defn_parsed.value);
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symbol16->storage_class = COFF_SymStorageClass_Static;
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}
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}
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}
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}
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ProfEnd();
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}
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internal
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THREAD_POOL_TASK_FUNC(lnk_patch_regular_symbols_task)
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{
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@@ -2580,41 +2836,6 @@ THREAD_POOL_TASK_FUNC(lnk_patch_regular_symbols_task)
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ProfEnd();
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}
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internal
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THREAD_POOL_TASK_FUNC(lnk_patch_common_block_symbols_task)
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{
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LNK_BuildImageTask *task = raw_task;
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U64 obj_idx = task_id;
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LNK_Obj *obj = task->objs[obj_idx];
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ProfBeginV("Patch Common Block Symbols [%S]", obj->path);
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COFF_ParsedSymbol symbol;
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for (U64 symbol_idx = 0; symbol_idx < obj->header.symbol_count; symbol_idx += (1 + symbol.aux_symbol_count)) {
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symbol = lnk_parsed_symbol_from_coff_symbol_idx(obj, symbol_idx);
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COFF_SymbolValueInterpType interp = coff_interp_symbol(symbol.section_number, symbol.value, symbol.storage_class);
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if (interp == COFF_SymbolValueInterp_Common) {
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LNK_Symbol *defn = lnk_symbol_table_search(task->symtab, LNK_SymbolScope_Defined, symbol.name);
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COFF_ParsedSymbol defn_parsed = lnk_parsed_symbol_from_coff_symbol_idx(defn->u.defined.obj, defn->u.defined.symbol_idx);
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Assert(coff_interp_symbol(defn_parsed.section_number, defn_parsed.value, defn_parsed.storage_class) == COFF_SymbolValueInterp_Regular);
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if (defn) {
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if (obj->header.is_big_obj) {
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COFF_Symbol32 *symbol32 = symbol.raw_symbol;
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symbol32->section_number = defn_parsed.section_number;
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symbol32->value = safe_cast_u32(defn_parsed.value);
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symbol32->storage_class = COFF_SymStorageClass_Static;
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} else {
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COFF_Symbol16 *symbol16 = symbol.raw_symbol;
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symbol16->section_number = safe_cast_u16(defn_parsed.section_number);
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symbol16->value = safe_cast_u32(defn_parsed.value);
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symbol16->storage_class = COFF_SymStorageClass_Static;
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}
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}
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}
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}
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ProfEnd();
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}
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internal
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THREAD_POOL_TASK_FUNC(lnk_patch_abs_symbols_task)
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{
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@@ -4003,6 +4224,12 @@ lnk_build_image(TP_Arena *arena, TP_Context *tp, LNK_Config *config, LNK_SymbolT
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Temp scratch = scratch_begin(arena->v, arena->count);
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/*
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ProfBegin("Gather Symbol Tables Fixups");
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tp_for_parallel(tp, 0, objs_count, lnk_gather_symtab_fixups_task, &task);
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ProfEnd();
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*/
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// init section table
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LNK_SectionTable *sectab = lnk_section_table_alloc();
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lnk_section_table_push(sectab, str8_lit(".text"), PE_TEXT_SECTION_FLAGS);
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@@ -4012,14 +4239,15 @@ lnk_build_image(TP_Arena *arena, TP_Context *tp, LNK_Config *config, LNK_SymbolT
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LNK_Section *common_block_sect = lnk_section_table_search(sectab, str8_lit(".bss"), PE_BSS_SECTION_FLAGS);
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LNK_BuildImageTask task = {0};
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task.symtab = symtab;
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task.sectab = sectab;
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task.null_sc = push_array(arena->v[0], LNK_SectionContrib, 1);
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task.function_pad_min = config->function_pad_min;
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task.default_align = coff_default_align_from_machine(config->machine);
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task.objs_count = objs_count;
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task.objs = objs;
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task.sect_map = 0;
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task.symtab = symtab;
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task.sectab = sectab;
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task.null_sc = push_array(arena->v[0], LNK_SectionContrib, 1);
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task.obj_symtab_fixups = push_array(scratch.arena, LNK_SymbolTableFixupArray, 1);
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task.function_pad_min = config->function_pad_min;
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task.default_align = coff_default_align_from_machine(config->machine);
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task.objs_count = objs_count;
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task.objs = objs;
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task.sect_map = 0;
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ProfBegin("Remove Associative Sections");
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tp_for_parallel(tp, 0, objs_count, lnk_remove_associative_sections_task, &task);
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@@ -4289,9 +4517,7 @@ lnk_build_image(TP_Arena *arena, TP_Context *tp, LNK_Config *config, LNK_SymbolT
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ProfEnd();
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}
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//
|
||||
// patch symbol tables
|
||||
//
|
||||
{
|
||||
ProfBegin("Patch Symbol Tables");
|
||||
Temp temp = temp_begin(scratch.arena);
|
||||
@@ -4311,8 +4537,8 @@ lnk_build_image(TP_Arena *arena, TP_Context *tp, LNK_Config *config, LNK_SymbolT
|
||||
tp_for_parallel(tp, 0, objs_count, lnk_flag_debug_symbols_task, &task);
|
||||
ProfEnd();
|
||||
|
||||
ProfBegin("Set COMDAT Leaders");
|
||||
tp_for_parallel(tp, 0, objs_count, lnk_set_comdat_leaders_task, &task);
|
||||
ProfBegin("Patch COMDAT Leaders");
|
||||
tp_for_parallel(tp, 0, objs_count, lnk_patch_comdat_leaders_task, &task);
|
||||
ProfEnd();
|
||||
|
||||
ProfBegin("Patch Common Block Leaders");
|
||||
@@ -4323,7 +4549,7 @@ lnk_build_image(TP_Arena *arena, TP_Context *tp, LNK_Config *config, LNK_SymbolT
|
||||
tp_for_parallel(tp, 0, task.objs_count, lnk_patch_regular_symbols_task, &task);
|
||||
ProfEnd();
|
||||
|
||||
ProfBegin("Patch Common blocks");
|
||||
ProfBegin("Patch Common Block Symbols");
|
||||
tp_for_parallel(tp, 0, task.objs_count, lnk_patch_common_block_symbols_task, &task);
|
||||
ProfEnd();
|
||||
|
||||
|
||||
+37
-10
@@ -25,6 +25,32 @@ typedef struct LNK_ImageContext
|
||||
LNK_SectionTable *sectab;
|
||||
} LNK_ImageContext;
|
||||
|
||||
typedef struct LNK_SymbolTableFixup
|
||||
{
|
||||
U32 idx;
|
||||
U32 obj_idx;
|
||||
U32 obj_symbol_idx;
|
||||
} LNK_SymbolTableFixup;
|
||||
|
||||
typedef struct LNK_SymbolTableFixupNode
|
||||
{
|
||||
LNK_SymbolTableFixup data;
|
||||
struct LNK_SymbolTableFixupNode *next;
|
||||
} LNK_SymbolTableFixupNode;
|
||||
|
||||
typedef struct LNK_SymbolTableFixupList
|
||||
{
|
||||
U64 count;
|
||||
LNK_SymbolTableFixupNode *first;
|
||||
LNK_SymbolTableFixupNode *last;
|
||||
} LNK_SymbolTableFixupList;
|
||||
|
||||
typedef struct LNK_SymbolTableFixupArray
|
||||
{
|
||||
U64 count;
|
||||
LNK_SymbolTableFixup *v;
|
||||
} LNK_SymbolTableFixupArray;
|
||||
|
||||
typedef struct LNK_SectionDefinition
|
||||
{
|
||||
String8 name;
|
||||
@@ -75,16 +101,17 @@ typedef struct LNK_BaseRelocPageArray
|
||||
|
||||
typedef struct
|
||||
{
|
||||
LNK_SymbolTable *symtab;
|
||||
LNK_SectionTable *sectab;
|
||||
LNK_SectionContrib *null_sc;
|
||||
U64 function_pad_min;
|
||||
U64 default_align;
|
||||
U64 objs_count;
|
||||
LNK_Obj **objs;
|
||||
LNK_SectionContrib ***sect_map;
|
||||
HashTable *contribs_ht;
|
||||
LNK_SectionArray image_sects;
|
||||
LNK_SymbolTable *symtab;
|
||||
LNK_SectionTable *sectab;
|
||||
LNK_SectionContrib *null_sc;
|
||||
LNK_SymbolTableFixupArray *obj_symtab_fixups;
|
||||
U64 function_pad_min;
|
||||
U64 default_align;
|
||||
U64 objs_count;
|
||||
LNK_Obj **objs;
|
||||
LNK_SectionContrib ***sect_map;
|
||||
HashTable *contribs_ht;
|
||||
LNK_SectionArray image_sects;
|
||||
union {
|
||||
struct {
|
||||
HashTable **defns;
|
||||
|
||||
Reference in New Issue
Block a user