[llvm] [Object][x86-64] Add support for `R_X86_64_GLOB_DAT` relocations. (PR #103029)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-llvm-binary-utilities

Author: Alastair Houghton (al45tair)

<details>
<summary>Changes</summary>

Add support for `R_X86_64_GLOB_DAT` relocations to the relocation resolver.

rdar://133510292

---
Full diff: https://github.com/llvm/llvm-project/pull/103029.diff


1 Files Affected:

- (modified) llvm/lib/Object/RelocationResolver.cpp (+3) 


``````````diff
diff --git a/llvm/lib/Object/RelocationResolver.cpp b/llvm/lib/Object/RelocationResolver.cpp
index d9bb8f175ef83a..7f90834c3d2199 100644
--- a/llvm/lib/Object/RelocationResolver.cpp
+++ b/llvm/lib/Object/RelocationResolver.cpp
@@ -47,6 +47,7 @@ static bool supportsX86_64(uint64_t Type) {
   case ELF::R_X86_64_PC64:
   case ELF::R_X86_64_32:
   case ELF::R_X86_64_32S:
+  case ELF::R_X86_64_GLOB_DAT:
     return true;
   default:
     return false;
@@ -68,6 +69,8 @@ static uint64_t resolveX86_64(uint64_t Type, uint64_t Offset, uint64_t S,
   case ELF::R_X86_64_32:
   case ELF::R_X86_64_32S:
     return (S + Addend) & 0xFFFFFFFF;
+  case ELF::R_X86_64_GLOB_DAT:
+    return S;
   default:
     llvm_unreachable("Invalid relocation type");
   }

``````````

</details>


https://github.com/llvm/llvm-project/pull/103029