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[ELF] Use the SystemV hash in libObject instead of rolling our own. 

llvm-svn: 286158
This commit is contained in:
Davide Italiano 2016-11-07 21:56:56 +00:00
parent dacb058fd6
commit e7fd0be1b4
1 changed files with 2 additions and 14 deletions
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16
lld/ELF/OutputSections.cpp
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@ -504,18 +504,6 @@ HashTableSection<ELFT>::HashTableSection()
this->Header.sh_addralign = sizeof(Elf_Word);
}
static uint32_t hashSysv(StringRef Name) {
uint32_t H = 0;
for (char C : Name) {
H = (H << 4) + C;
uint32_t G = H & 0xf0000000;
if (G)
H ^= G >> 24;
H &= ~G;
}
return H;
}
template <class ELFT> void HashTableSection<ELFT>::finalize() {
this->Header.sh_link = Out<ELFT>::DynSymTab->SectionIndex;
@ -542,7 +530,7 @@ template <class ELFT> void HashTableSection<ELFT>::writeTo(uint8_t *Buf) {
SymbolBody *Body = S.Symbol;
StringRef Name = Body->getName();
unsigned I = Body->DynsymIndex;
uint32_t Hash = hashSysv(Name) % NumSymbols;
uint32_t Hash = hashSysV(Name) % NumSymbols;
Chains[I] = Buckets[Hash];
Buckets[Hash] = I;
}
@ -1607,7 +1595,7 @@ void VersionDefinitionSection<ELFT>::writeOne(uint8_t *Buf, uint32_t Index,
Verdef->vd_next = sizeof(Elf_Verdef) + sizeof(Elf_Verdaux);
Verdef->vd_flags = (Index == 1 ? VER_FLG_BASE : 0);
Verdef->vd_ndx = Index;
Verdef->vd_hash = hashSysv(Name);
Verdef->vd_hash = hashSysV(Name);
auto *Verdaux = reinterpret_cast<Elf_Verdaux *>(Buf + sizeof(Elf_Verdef));
Verdaux->vda_name = NameOff;