[ELF2] Remove target specific code from GotPltSection.

The content of reserved entries of the .got.plt section is target specific.

In particular, on x86_64 the zero entry holds the address of the .dynamic section,
but on AArch64 the same info is stored in the zero entry of the .got section.

Differential revision: http://reviews.llvm.org/D14703

llvm-svn: 253239

1 files changed, 7 insertions, 0 deletions

diff --git a/lld/ELF/Target.cpp b/lld/ELF/Target.cpp
index d28fcfee2b1..269a4d7dc63 100644
--- a/lld/ELF/Target.cpp
+++ b/lld/ELF/Target.cpp
@@ -62,6 +62,7 @@ class X86_64TargetInfo final : public TargetInfo {
 public:
   X86_64TargetInfo();
   unsigned getPLTRefReloc(unsigned Type) const override;
+  void writeGotPltHeaderEntries(uint8_t *Buf) const override;
   void writeGotPltEntry(uint8_t *Buf, uint64_t Plt) const override;
   void writePltZeroEntry(uint8_t *Buf, uint64_t GotEntryAddr,
                          uint64_t PltEntryAddr) const override;
@@ -159,6 +160,8 @@ bool TargetInfo::isRelRelative(uint32_t Type) const { return true; }
 
 void TargetInfo::writeGotHeaderEntries(uint8_t *Buf) const {}
 
+void TargetInfo::writeGotPltHeaderEntries(uint8_t *Buf) const {}
+
 X86TargetInfo::X86TargetInfo() {
   PCRelReloc = R_386_PC32;
   GotReloc = R_386_GLOB_DAT;
@@ -226,6 +229,10 @@ X86_64TargetInfo::X86_64TargetInfo() {
   PltZeroEntrySize = 16;
 }
 
+void X86_64TargetInfo::writeGotPltHeaderEntries(uint8_t *Buf) const {
+  write64le(Buf, Out<ELF64LE>::Dynamic->getVA());
+}
+
 void X86_64TargetInfo::writeGotPltEntry(uint8_t *Buf, uint64_t Plt) const {
   // Skip 6 bytes of "jmpq *got(%rip)"
   write32le(Buf, Plt + 6);