From 2f37a22f10a1128c695bc469871a9101edce853e Mon Sep 17 00:00:00 2001
From: Fangrui Song <i@maskray.me>
Date: Mon, 8 Jul 2024 09:14:34 -0700
Subject: [llvm-objdump] -r: support CREL

Extract the llvm-readelf decoder to `decodeCrel` (#91280) and reuse it
for llvm-objdump.

Because the section representation of LLVMObject (`SectionRef`) is
64-bit, insufficient to hold all decoder states, `section_rel_begin` is
modified to decode CREL eagerly and hold the decoded relocations inside
ELFObjectFile<ELFT>.

The test is adapted from llvm/test/tools/llvm-readobj/ELF/crel.test.

Pull Request: https://github.com/llvm/llvm-project/pull/97382
---
 llvm/lib/Object/ELFObjectFile.cpp | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'llvm/lib/Object/ELFObjectFile.cpp')

diff --git a/llvm/lib/Object/ELFObjectFile.cpp b/llvm/lib/Object/ELFObjectFile.cpp
index cbc55a1..53c3de0 100644
--- a/llvm/lib/Object/ELFObjectFile.cpp
+++ b/llvm/lib/Object/ELFObjectFile.cpp
@@ -1013,3 +1013,14 @@ Expected<std::vector<BBAddrMap>> ELFObjectFileBase::readBBAddrMap(
   return readBBAddrMapImpl(cast<ELF64BEObjectFile>(this)->getELFFile(),
                            TextSectionIndex, PGOAnalyses);
 }
+
+StringRef ELFObjectFileBase::getCrelDecodeProblem(SectionRef Sec) const {
+  auto Data = Sec.getRawDataRefImpl();
+  if (const auto *Obj = dyn_cast<ELF32LEObjectFile>(this))
+    return Obj->getCrelDecodeProblem(Data);
+  if (const auto *Obj = dyn_cast<ELF32BEObjectFile>(this))
+    return Obj->getCrelDecodeProblem(Data);
+  if (const auto *Obj = dyn_cast<ELF64LEObjectFile>(this))
+    return Obj->getCrelDecodeProblem(Data);
+  return cast<ELF64BEObjectFile>(this)->getCrelDecodeProblem(Data);
+}
-- 
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