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Add comments to SymbolTableSection. 

llvm-svn: 296318
This commit is contained in:
Rui Ueyama 2017-02-27 03:31:19 +00:00
parent 8589e10c30
commit bb07d10601
1 changed files with 8 additions and 2 deletions
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10
lld/ELF/SyntheticSections.cpp
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@ -1293,6 +1293,10 @@ static bool sortMipsSymbols(const SymbolBody *L, const SymbolBody *R) {
return L->GotIndex < R->GotIndex;
}
// Finalize a symbol table. The ELF spec requires that all local
// symbols precede global symbols, so we sort symbol entries in this
// function. (For .dynsym, we don't do that because symbols for
// dynamic linking are inherently all globals.)
template <class ELFT> void SymbolTableSection<ELFT>::finalizeContents() {
this->OutSec->Link = this->Link = StrTabSec.OutSec->SectionIndex;
this->OutSec->Entsize = this->Entsize;
@ -1321,14 +1325,16 @@ template <class ELFT> void SymbolTableSection<ELFT>::finalizeContents() {
return;
}
if (In<ELFT>::GnuHashTab)
if (In<ELFT>::GnuHashTab) {
// NB: It also sorts Symbols to meet the GNU hash table requirements.
In<ELFT>::GnuHashTab->addSymbols(Symbols);
else if (Config->EMachine == EM_MIPS)
} else if (Config->EMachine == EM_MIPS) {
std::stable_sort(Symbols.begin(), Symbols.end(),
[](const SymbolTableEntry &L, const SymbolTableEntry &R) {
return sortMipsSymbols(L.Symbol, R.Symbol);
});
}
size_t I = 0;
for (const SymbolTableEntry &S : Symbols)
S.Symbol->DynsymIndex = ++I;