[llvm] [llvm-objdump] Rework .gnu.version_d dumping (PR #128434)

[James Henderson via llvm-commits]

================
@@ -0,0 +1,50 @@
+## Adapted from test/llvm-readobj/ELF/verdef-invalid.test
+## Check that we report a warning when a SHT_GNU_verdef section contains a version definition
+## that refers to an auxiliary entry that goes past the end of the section.
+
+# RUN: yaml2obj %s -o %t5
+# RUN: llvm-objdump -p %t5 2>&1 | FileCheck %s --check-prefix=AUX-PAST-END -DFILE=%t5
+# RUN: llvm-objdump -p %t5 2>&1 | FileCheck %s --check-prefix=AUX-PAST-END -DFILE=%t5
+
+# AUX-PAST-END: warning: '[[FILE]]': invalid SHT_GNU_verdef section with index 1: version definition 1 refers to an auxiliary entry that goes past the end of the section
+
+--- !ELF
+FileHeader:
+  Class: ELFCLASS64
+  Data:  ELFDATA2LSB
+  Type:  ET_DYN
+Sections:
+  - Name: .gnu.version_d
+    Type: SHT_GNU_verdef
+    Entries:
+      - Names:
+          - FOO
+    ShSize: 21
+DynamicSymbols:
+  - Name: foo
+
+## Check we report a warning when a version definition is not correctly aligned in memory.
+
+# RUN: yaml2obj %s --docnum=2 -o %t7
----------------
jh7370 wrote:

Same as nit above (`%t7` -> e.g. `%t2`)

https://github.com/llvm/llvm-project/pull/128434