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assign layout offsets and sizes to merged sections

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This commit is contained in:
Nikita Smith
2025-06-25 10:53:22 -07:00
committed by Ryan Fleury
parent f75cdd23d7
commit 03e4958190
4 changed files with 95 additions and 32 deletions
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src/linker/lnk.c
+34 -17
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@@ -2281,6 +2281,11 @@ lnk_build_win32_image(TP_Arena *arena, TP_Context *tp, LNK_Config *config, LNK_S
{
ProfBegin("Finalize Sections Layout");
// merge sections
if (config->flags & LNK_ConfigFlag_Merge) {
lnk_section_table_merge(sectab, config->merge_list);
}
// sort contribs
for (LNK_SectionNode *sect_n = sectab->list.first; sect_n != 0; sect_n = sect_n->next) {
for (LNK_SectionContribChunk *sc_chunk = sect_n->data.contribs.first; sc_chunk != 0; sc_chunk = sc_chunk->next) {
@@ -2289,32 +2294,31 @@ lnk_build_win32_image(TP_Arena *arena, TP_Context *tp, LNK_Config *config, LNK_S
}
}
// merge sections
if (config->flags & LNK_ConfigFlag_Merge) {
lnk_section_table_merge(sectab, config->merge_list);
}
// assign contribs offsets, sizes, and section indices
for (LNK_SectionNode *sect_n = sectab->list.first; sect_n != 0; sect_n = sect_n->next) {
lnk_finalize_section_layout(sectab, &sect_n->data, config->file_align);
}
// remove empty sections
String8List empty_sect_list = {0};
for (LNK_SectionNode *sect_n = sectab->list.first; sect_n != 0; sect_n = sect_n->next) {
LNK_Section *sect = &sect_n->data;
if (sect->vsize == 0) {
str8_list_push(scratch.arena, &empty_sect_list, sect->name);
{
String8List empty_sect_list = {0};
for (LNK_SectionNode *sect_n = sectab->list.first; sect_n != 0; sect_n = sect_n->next) {
LNK_Section *sect = &sect_n->data;
if (sect->vsize == 0) {
str8_list_push(scratch.arena, &empty_sect_list, sect->name);
}
}
for (String8Node *name_n = empty_sect_list.first; name_n != 0; name_n = name_n->next) {
lnk_section_table_remove(sectab, name_n->string);
}
}
for (String8Node *name_n = empty_sect_list.first; name_n != 0; name_n = name_n->next) {
lnk_section_table_remove(sectab, name_n->string);
}
// assign section indices to sections
U64 sect_idx = 0;
for (LNK_SectionNode *sect_n = sectab->list.first; sect_n != 0; sect_n = sect_n->next) {
sect_n->data.sect_idx = sect_idx++;
{
U64 sect_idx = 0;
for (LNK_SectionNode *sect_n = sectab->list.first; sect_n != 0; sect_n = sect_n->next) {
sect_n->data.sect_idx = sect_idx++;
}
}
// assign section indices to contribs
@@ -2327,6 +2331,19 @@ lnk_build_win32_image(TP_Arena *arena, TP_Context *tp, LNK_Config *config, LNK_S
}
}
// assing layout offsets and sizes to merged sections
for (LNK_SectionNode *sect_n = sectab->merge_list.first; sect_n != 0; sect_n = sect_n->next) {
LNK_Section *sect = &sect_n->data;
LNK_SectionContrib *first_sc = lnk_get_first_section_contrib(sect);
LNK_SectionContrib *last_sc = lnk_get_last_section_contrib(sect);
LNK_Section *final_sect = lnk_finalized_section_from_id(sectab, sect->merge_id);
sect->voff = final_sect->voff + first_sc->u.off;
sect->vsize = (last_sc->u.off - first_sc->u.off) + last_sc->u.size;
sect->foff = final_sect->foff + first_sc->u.off;
sect->fsize = (last_sc->u.off - first_sc->u.off) + last_sc->u.size;
sect->sect_idx = final_sect->sect_idx;
}
ProfEnd();
}
@@ -3054,7 +3071,7 @@ lnk_build_win32_image(TP_Arena *arena, TP_Context *tp, LNK_Config *config, LNK_S
ProfEnd();
}
// patch Debug
// patch debug
{
LNK_Section *debug_dir_sect = lnk_section_table_search(sectab, str8_lit(".RAD_LINKER_DEBUG_DIR"), PE_RDATA_SECTION_FLAGS);
if (debug_dir_sect) {