[lld] r288128 - [ELF][MIPS] Replace the magic number of GOT header entries by constant. NFC
Simon Atanasyan via llvm-commits
llvm-commits at lists.llvm.org
Tue Nov 29 02:23:50 PST 2016
Author: atanasyan
Date: Tue Nov 29 04:23:50 2016
New Revision: 288128
URL: http://llvm.org/viewvc/llvm-project?rev=288128&view=rev
Log:
[ELF][MIPS] Replace the magic number of GOT header entries by constant. NFC
Modified:
lld/trunk/ELF/SyntheticSections.cpp
lld/trunk/ELF/SyntheticSections.h
Modified: lld/trunk/ELF/SyntheticSections.cpp
URL: http://llvm.org/viewvc/llvm-project/lld/trunk/ELF/SyntheticSections.cpp?rev=288128&r1=288127&r2=288128&view=diff
==============================================================================
--- lld/trunk/ELF/SyntheticSections.cpp (original)
+++ lld/trunk/ELF/SyntheticSections.cpp Tue Nov 29 04:23:50 2016
@@ -536,10 +536,10 @@ MipsGotSection<ELFT>::getPageEntryOffset
EntryValue = (EntryValue + 0x8000) & ~0xffff;
// Take into account MIPS GOT header.
// See comment in the MipsGotSection::writeTo.
- size_t NewIndex = PageIndexMap.size() + 2;
+ size_t NewIndex = PageIndexMap.size();
auto P = PageIndexMap.insert(std::make_pair(EntryValue, NewIndex));
- assert(!P.second || PageIndexMap.size() <= (PageEntriesNum - 2));
- return (uintX_t)P.first->second * sizeof(uintX_t);
+ assert(!P.second || PageIndexMap.size() <= PageEntriesNum);
+ return (HeaderEntriesNum + P.first->second) * sizeof(uintX_t);
}
template <class ELFT>
@@ -547,25 +547,22 @@ typename MipsGotSection<ELFT>::uintX_t
MipsGotSection<ELFT>::getBodyEntryOffset(const SymbolBody &B,
uintX_t Addend) const {
// Calculate offset of the GOT entries block: TLS, global, local.
- uintX_t GotBlockOff;
+ uintX_t Index = HeaderEntriesNum + PageEntriesNum;
if (B.isTls())
- GotBlockOff = getTlsOffset();
+ Index += LocalEntries.size() + LocalEntries32.size() + GlobalEntries.size();
else if (B.IsInGlobalMipsGot)
- GotBlockOff = getLocalEntriesNum() * sizeof(uintX_t);
+ Index += LocalEntries.size() + LocalEntries32.size();
else if (B.Is32BitMipsGot)
- GotBlockOff = (PageEntriesNum + LocalEntries.size()) * sizeof(uintX_t);
- else
- GotBlockOff = PageEntriesNum * sizeof(uintX_t);
- // Calculate index of the GOT entry in the block.
- uintX_t GotIndex;
+ Index += LocalEntries.size();
+ // Calculate offset of the GOT entry in the block.
if (B.isInGot())
- GotIndex = B.GotIndex;
+ Index += B.GotIndex;
else {
auto It = EntryIndexMap.find({&B, Addend});
assert(It != EntryIndexMap.end());
- GotIndex = It->second;
+ Index += It->second;
}
- return GotBlockOff + GotIndex * sizeof(uintX_t);
+ return Index * sizeof(uintX_t);
}
template <class ELFT>
@@ -587,14 +584,15 @@ const SymbolBody *MipsGotSection<ELFT>::
template <class ELFT>
unsigned MipsGotSection<ELFT>::getLocalEntriesNum() const {
- return PageEntriesNum + LocalEntries.size() + LocalEntries32.size();
+ return HeaderEntriesNum + PageEntriesNum + LocalEntries.size() +
+ LocalEntries32.size();
}
template <class ELFT> void MipsGotSection<ELFT>::finalize() {
size_t EntriesNum = TlsEntries.size();
// Take into account MIPS GOT header.
// See comment in the MipsGotSection::writeTo.
- PageEntriesNum = 2;
+ PageEntriesNum = 0;
for (const OutputSectionBase *OutSec : OutSections) {
// Calculate an upper bound of MIPS GOT entries required to store page
// addresses of local symbols. We assume the worst case - each 64kb
@@ -640,6 +638,7 @@ template <class ELFT> void MipsGotSectio
// if we had to do this.
auto *P = reinterpret_cast<typename ELFT::Off *>(Buf);
P[1] = uintX_t(1) << (ELFT::Is64Bits ? 63 : 31);
+ Buf += HeaderEntriesNum * sizeof(uintX_t);
// Write 'page address' entries to the local part of the GOT.
for (std::pair<uintX_t, size_t> &L : PageIndexMap) {
uint8_t *Entry = Buf + L.second * sizeof(uintX_t);
Modified: lld/trunk/ELF/SyntheticSections.h
URL: http://llvm.org/viewvc/llvm-project/lld/trunk/ELF/SyntheticSections.h?rev=288128&r1=288127&r2=288128&view=diff
==============================================================================
--- lld/trunk/ELF/SyntheticSections.h (original)
+++ lld/trunk/ELF/SyntheticSections.h Tue Nov 29 04:23:50 2016
@@ -164,7 +164,9 @@ private:
// TLS entries:
// Entries created by TLS relocations.
- // Total number of allocated "Header" and "Page" entries.
+ // Number of "Header" entries.
+ static const unsigned HeaderEntriesNum = 2;
+ // Number of allocated "Page" entries.
uint32_t PageEntriesNum = 0;
// Output sections referenced by MIPS GOT relocations.
llvm::SmallPtrSet<const OutputSectionBase *, 10> OutSections;
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