lld/ELF/MarkLive.cpp

53   void enqueue(InputSectionBase *sec, uint64_t offset);
58   void resolveReloc(InputSectionBase &sec, RelTy &rel, bool fromFDE);
76 static uint64_t getAddend(InputSectionBase &sec,
78   return target->getImplicitAddend(sec.content().begin() + rel.r_offset,
83 static uint64_t getAddend(InputSectionBase &sec,
90 void MarkLive<ELFT>::resolveReloc(InputSectionBase &sec, RelTy &rel,
92   Symbol &sym = sec.getFile<ELFT>()->getRelocTargetSym(rel);
104       offset += getAddend<ELFT>(sec, rel);
124   for (InputSectionBase *sec : cNamedSections.lookup(sym.getName()))
125     enqueue(sec, 0);
163 static bool isReserved(InputSectionBase *sec) {
164   switch (sec->type) {
171     return !sec->nextInSectionGroup;
176     StringRef s = sec->name;
183 void MarkLive<ELFT>::enqueue(InputSectionBase *sec, uint64_t offset) {
187   if (auto *ms = dyn_cast<MergeInputSection>(sec))
193   if (sec->partition == 1 || sec->partition == partition)
195   sec->partition = sec->partition ? 1 : partition;
198   if (InputSection *s = dyn_cast<InputSection>(sec))
245   for (InputSectionBase *sec : ctx.inputSections) {
246     if (sec->flags & SHF_GNU_RETAIN) {
247       enqueue(sec, 0);
250     if (sec->flags & SHF_LINK_ORDER)
275     if (!(sec->flags & SHF_ALLOC)) {
276       bool isRel = sec->type == SHT_REL || sec->type == SHT_RELA;
277       if (!isRel && !sec->nextInSectionGroup) {
278         sec->markLive();
279         for (InputSection *isec : sec->dependentSections)
286     if (isReserved(sec) || script->shouldKeep(sec)) {
287       enqueue(sec, 0);
288     } else if ((!config->zStartStopGC || sec->name.startswith("__libc_")) &&
289                isValidCIdentifier(sec->name)) {
293       cNamedSections[saver().save("__start_" + sec->name)].push_back(sec);
294       cNamedSections[saver().save("__stop_" + sec->name)].push_back(sec);
304     InputSectionBase &sec = *queue.pop_back_val();
306     const RelsOrRelas<ELFT> rels = sec.template relsOrRelas<ELFT>();
308       resolveReloc(sec, rel, false);
310       resolveReloc(sec, rel, false);
312     for (InputSectionBase *isec : sec.dependentSections)
316     if (sec.nextInSectionGroup)
317       enqueue(sec.nextInSectionGroup, 0);
338   for (InputSectionBase *sec : ctx.inputSections) {
339     if (!sec->isLive() || !isValidCIdentifier(sec->name))
341     if (symtab.find(("__start_" + sec->name).str()) ||
342         symtab.find(("__stop_" + sec->name).str()))
343       enqueue(sec, 0);
364   for (InputSectionBase *sec : ctx.inputSections)
365     sec->markDead();
379     for (InputSectionBase *sec : ctx.inputSections)
380       if (!sec->isLive())
381         message("removing unused section " + toString(sec));