[ELF][MIPS] Accept MIPS 64-bit binaries

LLD accepts MIPS 64-bit binaries, supports corresponding eulation (-m)
arguments and emits 64-bit specific ELF flags.

llvm-svn: 268024

1 files changed, 6 insertions, 3 deletions

diff --git a/lld/ELF/Writer.cpp b/lld/ELF/Writer.cpp
index 514b21a5826..86915f31beb 100644
--- a/lld/ELF/Writer.cpp
+++ b/lld/ELF/Writer.cpp
@@ -1760,10 +1760,13 @@ template <class ELFT> void Writer<ELFT>::setPhdrs() {
   }
 }
 
-static uint32_t getMipsEFlags() {
+static uint32_t getMipsEFlags(bool Is64Bits) {
   // FIXME: In fact ELF flags depends on ELF flags of input object files
   // and selected emulation. For now just use hard coded values.
-  uint32_t V = EF_MIPS_ABI_O32 | EF_MIPS_CPIC | EF_MIPS_ARCH_32R2;
+  if (Is64Bits)
+    return EF_MIPS_CPIC | EF_MIPS_PIC | EF_MIPS_ARCH_64R2;
+
+  uint32_t V = EF_MIPS_CPIC | EF_MIPS_ABI_O32 | EF_MIPS_ARCH_32R2;
   if (Config->Shared)
     V |= EF_MIPS_PIC;
   return V;
@@ -1844,7 +1847,7 @@ template <class ELFT> void Writer<ELFT>::writeHeader() {
   EHdr->e_shstrndx = Out<ELFT>::ShStrTab->SectionIndex;
 
   if (Config->EMachine == EM_MIPS)
-    EHdr->e_flags = getMipsEFlags();
+    EHdr->e_flags = getMipsEFlags(ELFT::Is64Bits);
 
   if (!Config->Relocatable) {
     EHdr->e_phoff = sizeof(Elf_Ehdr);