[llvm] Correct .dynstr finding of getDynamicStrTab() (PR #127975)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

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

Author: Ruoyu Qiu (cabbaken)

<details>
<summary>Changes</summary>

More info: https://github.com/llvm/llvm-project/pull/125679#discussion_r1961333454

---
Full diff: https://github.com/llvm/llvm-project/pull/127975.diff


2 Files Affected:

- (modified) llvm/test/tools/llvm-objdump/ELF/private-headers.test (+1) 
- (modified) llvm/tools/llvm-objdump/ELFDump.cpp (+2-2) 


``````````diff
diff --git a/llvm/test/tools/llvm-objdump/ELF/private-headers.test b/llvm/test/tools/llvm-objdump/ELF/private-headers.test
index eefdc8440385c..c90cf59f4ed7d 100644
--- a/llvm/test/tools/llvm-objdump/ELF/private-headers.test
+++ b/llvm/test/tools/llvm-objdump/ELF/private-headers.test
@@ -30,6 +30,7 @@ Sections:
   - Name:    .dynamic
     Type:    SHT_DYNAMIC
     Flags:   [ SHF_ALLOC ]
+    Link:    1
     Entries:
      - Tag:   DT_NEEDED
        Value: 0x1
diff --git a/llvm/tools/llvm-objdump/ELFDump.cpp b/llvm/tools/llvm-objdump/ELFDump.cpp
index e9e5b059f1786..bce308c870ddf 100644
--- a/llvm/tools/llvm-objdump/ELFDump.cpp
+++ b/llvm/tools/llvm-objdump/ELFDump.cpp
@@ -78,8 +78,8 @@ static Expected<StringRef> getDynamicStrTab(const ELFFile<ELFT> &Elf) {
     return SectionsOrError.takeError();
 
   for (const typename ELFT::Shdr &Sec : *SectionsOrError) {
-    if (Sec.sh_type == ELF::SHT_DYNSYM)
-      return Elf.getStringTableForSymtab(Sec);
+    if (Sec.sh_type == ELF::SHT_DYNAMIC)
+      return Elf.getLinkAsStrtab(Sec);
   }
 
   return createError("dynamic string table not found");

``````````

</details>


https://github.com/llvm/llvm-project/pull/127975