[ELF] - Process R_X86_64_GOTPCRELX/R_X86_64_REX_GOTPCRELX relocations.

R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX relocations were added in latest ABI:
https://github.com/hjl-tools/x86-psABI/wiki/x86-64-psABI-r249.pdf

They should be generated instead of R_X86_64_GOTPCREL for cases
when relaxation is possible. Currently this patch just process them in the
same way like R_X86_64_GOTPCREL. That should work for now
and we can implement relaxations later.

There is no testcases provided as I think there is no way to generate
such relocations using llvm-mc atm.

Differential revision: http://reviews.llvm.org/D18301

llvm-svn: 264043

diff --git a/lld/ELF/Target.cpp b/lld/ELF/Target.cpp
index fda8975..65fb032 100644 (file)
--- a/lld/ELF/Target.cpp
+++ b/lld/ELF/Target.cpp
@@ -736,7 +736,8 @@ bool X86_64TargetInfo::needsCopyRelImpl(uint32_t Type) const {
 }
 
 bool X86_64TargetInfo::refersToGotEntry(uint32_t Type) const {
-  return Type == R_X86_64_GOTPCREL;
+  return Type == R_X86_64_GOTPCREL || Type == R_X86_64_GOTPCRELX ||
+         Type == R_X86_64_REX_GOTPCRELX;
 }
 
 bool X86_64TargetInfo::needsGot(uint32_t Type, SymbolBody &S) const {
@@ -934,6 +935,8 @@ void X86_64TargetInfo::relocateOne(uint8_t *Loc, uint8_t *BufEnd, uint32_t Type,
     write32le(Loc, SA);
     break;
   case R_X86_64_GOTPCREL:
+  case R_X86_64_GOTPCRELX:
+  case R_X86_64_REX_GOTPCRELX:
   case R_X86_64_PC32:
   case R_X86_64_PLT32:
   case R_X86_64_TLSGD: