[JITLink][COFF][x86_64] Implement ADDR64 relocation.

[sunho]

Summary

Implements ADDR64 relocation using x86_64 edge kind.

[sunho]

rebase

[lhames]

LGTM.

[sunho]

rebase

llvm/lib/ExecutionEngine/JITLink/COFF_x86_64.cpp

Error applyFixup(LinkGraph &G, Block &B, const Edge &E) const {
     return x86_64::applyFixup(G, B, E, nullptr);
   }
 };
 
 class COFFLinkGraphBuilder_x86_64 : public COFFLinkGraphBuilder {
 private:
   enum COFFX86RelocationKind {
     COFFAddr32NB,
+    COFFAddr64,
     COFFRel32,
     COFFRel32_1,
   };
 
   static Expected<COFFX86RelocationKind>
   getRelocationKind(const uint32_t Type) {
     switch (Type) {
     case COFF::RelocationTypeAMD64::IMAGE_REL_AMD64_ADDR32NB:
       return COFFAddr32NB;
+    case COFF::RelocationTypeAMD64::IMAGE_REL_AMD64_ADDR64:
+      return COFFAddr64;
     case COFF::RelocationTypeAMD64::IMAGE_REL_AMD64_REL32:
       return COFFRel32;
     case COFF::RelocationTypeAMD64::IMAGE_REL_AMD64_REL32_1:
       return COFFRel32_1;
     }
 
     return make_error<JITLinkError>("Unsupported x86_64 relocation:" +
                                     formatv("{0:d}", Type));
Error addSingleRelocation(const object::RelocationRef &Rel,
     const char *FixupPtr = BlockToFix.getContent().data() + Offset;
 
     switch (*RelocKind) {
     case COFFAddr32NB: {
       Kind = EdgeKind_coff_x86_64::Pointer32NB;
       Addend = *reinterpret_cast<const support::little32_t *>(FixupPtr);
       break;
     }
+    case COFFAddr64: {
+      Kind = x86_64::Pointer64;
+      Addend = *reinterpret_cast<const support::little32_t *>(FixupPtr);
+      break;
+    }
     case COFFRel32: {
       Kind = x86_64::PCRel32;
       Addend = *reinterpret_cast<const support::little32_t *>(FixupPtr);
       break;
     }
     case COFFRel32_1: {
       Kind = x86_64::PCRel32;
       Addend = *reinterpret_cast<const support::little32_t *>(FixupPtr) - 1;

llvm/test/ExecutionEngine/JITLink/X86/COFF_x86-64_small_pic_relocations.s

# jitlink-check:     extern_out_of_range32
   .scl 2;
   .type 32;
   .endef
   .globl test_call_dllimport
   .p2align 4, 0x90
 test_call_dllimport:
   callq *__imp_extern_out_of_range32(%rip)
 
+# Check IMAGE_REL_AMD64_ADDR64 sets address of symbol to the fixup position.
+# jitlink-check: *{8}(test_addr64) = named_data
+  .text
+  .def named_func;
+  .scl 2;
+  .type 32;
+  .endef
+  .globl test_addr64
+  .p2align 4, 0x90
+test_addr64:
+  .quad named_data
+
 # Local named data/func that is used in conjunction with other test cases
   .text
   .def named_func;
   .scl 2;
   .type 32;
   .endef
   .globl named_func
   .p2align 4, 0x90
 named_func:
   retq
 
   .data
   .p2align 3
 named_data:
   .quad 53