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))
249   for (InputSectionBase *sec : ctx.inputSections) {
250     if (sec->flags & SHF_GNU_RETAIN) {
251       enqueue(sec, 0);
254     if (sec->flags & SHF_LINK_ORDER)
279     if (!(sec->flags & SHF_ALLOC)) {
280       bool isRel = sec->type == SHT_REL || sec->type == SHT_RELA;
281       if (!isRel && !sec->nextInSectionGroup) {
282         sec->markLive();
283         for (InputSection *isec : sec->dependentSections)
290     if (isReserved(sec) || script->shouldKeep(sec)) {
291       enqueue(sec, 0);
292     } else if ((!config->zStartStopGC || sec->name.starts_with("__libc_")) &&
293                isValidCIdentifier(sec->name)) {
297       cNamedSections[saver().save("__start_" + sec->name)].push_back(sec);
298       cNamedSections[saver().save("__stop_" + sec->name)].push_back(sec);
308     InputSectionBase &sec = *queue.pop_back_val();
310     const RelsOrRelas<ELFT> rels = sec.template relsOrRelas<ELFT>();
312       resolveReloc(sec, rel, false);
314       resolveReloc(sec, rel, false);
316     for (InputSectionBase *isec : sec.dependentSections)
320     if (sec.nextInSectionGroup)
321       enqueue(sec.nextInSectionGroup, 0);
342   for (InputSectionBase *sec : ctx.inputSections) {
343     if (!sec->isLive() || !isValidCIdentifier(sec->name))
345     if (symtab.find(("__start_" + sec->name).str()) ||
346         symtab.find(("__stop_" + sec->name).str()))
347       enqueue(sec, 0);
368   for (InputSectionBase *sec : ctx.inputSections)
369     sec->markDead();
383     for (InputSectionBase *sec : ctx.inputSections)
384       if (!sec->isLive())
385         message("removing unused section " + toString(sec));