[llvm-readobj/elf][test] - Add testing for EM_* specific OS/ABI values.

We have no tests for OS/ABI values specific to
EM_TI_C6000, ELFOSABI_AMDGPU_MESA3D and ELFOSABI_ARM machines.

Also, related arrays in the code are not grouped together.
(That is why such testing was missed I guess).

The patch fixes that all.

Differential revision: https://reviews.llvm.org/D86341

llvm/test/tools/llvm-readobj/ELF/file-header-os-abi.test

@@ -10,10 +10,11 @@
 
 --- !ELF
 FileHeader:
-  Class: ELFCLASS64
-  Data:  ELFDATA2LSB
-  Type:  ET_REL
-  OSABI: [[OSABI]]
+  Class:   ELFCLASS64
+  Data:    ELFDATA2LSB
+  Type:    ET_REL
+  Machine: [[MACHINE=<none>]]
+  OSABI:   [[OSABI]]
 
 ## EI_OSABI is set to ELFOSABI_HPUX.
 # RUN: yaml2obj %s -DOSABI=ELFOSABI_HPUX -o %t.osabi.hpux
@@ -158,3 +159,51 @@ FileHeader:
 
 # OSABI-UNKNOWN-LLVM: OS/ABI: 0xFE
 # OSABI-UNKNOWN-GNU:  OS/ABI: fe
+
+## Check all EM_AMDGPU specific values.
+
+# RUN: yaml2obj %s -DOSABI=ELFOSABI_AMDGPU_HSA -DMACHINE=EM_AMDGPU -o %t.osabi.amd.hsa
+# RUN: llvm-readobj --file-headers %t.osabi.amd.hsa | FileCheck %s --match-full-lines --check-prefix=OSABI-AMDHSA-LLVM
+# RUN: llvm-readelf --file-headers %t.osabi.amd.hsa | FileCheck %s --match-full-lines --check-prefix=OSABI-AMDHSA-GNU
+
+# OSABI-AMDHSA-LLVM: OS/ABI: AMDGPU_HSA (0x40)
+# OSABI-AMDHSA-GNU:  OS/ABI: 40
+
+# RUN: yaml2obj %s -DOSABI=ELFOSABI_AMDGPU_PAL -DMACHINE=EM_AMDGPU -o %t.osabi.amd.pal
+# RUN: llvm-readobj --file-headers %t.osabi.amd.pal | FileCheck %s --match-full-lines --check-prefix=OSABI-AMDPAL-LLVM
+# RUN: llvm-readelf --file-headers %t.osabi.amd.pal | FileCheck %s --match-full-lines --check-prefix=OSABI-AMDPAL-GNU
+
+# OSABI-AMDPAL-LLVM: OS/ABI: AMDGPU_PAL (0x41)
+# OSABI-AMDPAL-GNU:  OS/ABI: 41
+
+# RUN: yaml2obj %s -DOSABI=ELFOSABI_AMDGPU_MESA3D -DMACHINE=EM_AMDGPU -o %t.osabi.amd.mesa3d
+# RUN: llvm-readobj --file-headers %t.osabi.amd.mesa3d | FileCheck %s --match-full-lines --check-prefix=OSABI-AMDMESA3D-LLVM
+# RUN: llvm-readelf --file-headers %t.osabi.amd.mesa3d | FileCheck %s --match-full-lines --check-prefix=OSABI-AMDMESA3D-GNU
+
+# OSABI-AMDMESA3D-LLVM: OS/ABI: AMDGPU_MESA3D (0x42)
+# OSABI-AMDMESA3D-GNU:  OS/ABI: 42
+
+# Check all EM_ARM specific values.
+
+# RUN: yaml2obj %s -DOSABI=ELFOSABI_ARM -DMACHINE=EM_ARM -o %t.osabi.arm
+# RUN: llvm-readobj --file-headers %t.osabi.arm | FileCheck %s --match-full-lines --check-prefix=OSABI-ARM-LLVM
+# RUN: llvm-readelf --file-headers %t.osabi.arm | FileCheck %s --match-full-lines --check-prefix=OSABI-ARM-GNU
+
+# OSABI-ARM-LLVM: OS/ABI: ARM (0x61)
+# OSABI-ARM-GNU:  OS/ABI: 61
+
+## Check all EM_TI_C6000 specific values.
+
+# RUN: yaml2obj %s -DOSABI=ELFOSABI_C6000_ELFABI -DMACHINE=EM_TI_C6000 -o %t.osabi.c6000.elfabi
+# RUN: llvm-readobj --file-headers %t.osabi.c6000.elfabi | FileCheck %s --match-full-lines --check-prefix=OSABI-C6000ELFABI-LLVM
+# RUN: llvm-readelf --file-headers %t.osabi.c6000.elfabi | FileCheck %s --match-full-lines --check-prefix=OSABI-C6000ELFABI-GNU
+
+# OSABI-C6000ELFABI-LLVM: OS/ABI: C6000_ELFABI (0x40)
+# OSABI-C6000ELFABI-GNU:  OS/ABI: 40
+
+# RUN: yaml2obj %s -DOSABI=ELFOSABI_C6000_LINUX -DMACHINE=EM_TI_C6000 -o %t.osabi.c6000.linux
+# RUN: llvm-readobj --file-headers %t.osabi.c6000.linux | FileCheck %s --match-full-lines --check-prefix=OSABI-C6000LINUX-LLVM
+# RUN: llvm-readelf --file-headers %t.osabi.c6000.linux | FileCheck %s --match-full-lines --check-prefix=OSABI-C6000LINUX-GNU
+
+# OSABI-C6000LINUX-LLVM: OS/ABI: C6000_LINUX (0x41)
+# OSABI-C6000LINUX-GNU:  OS/ABI: 41

llvm/tools/llvm-readobj/ELFDumper.cpp

@@ -1320,11 +1320,6 @@ static const EnumEntry<unsigned> ElfOSABI[] = {
   {"Standalone",   "Standalone App",       ELF::ELFOSABI_STANDALONE}
 };
 
-static const EnumEntry<unsigned> SymVersionFlags[] = {
-    {"Base", "BASE", VER_FLG_BASE},
-    {"Weak", "WEAK", VER_FLG_WEAK},
-    {"Info", "INFO", VER_FLG_INFO}};
-
 static const EnumEntry<unsigned> AMDGPUElfOSABI[] = {
   {"AMDGPU_HSA",    "AMDGPU - HSA",    ELF::ELFOSABI_AMDGPU_HSA},
   {"AMDGPU_PAL",    "AMDGPU - PAL",    ELF::ELFOSABI_AMDGPU_PAL},
@@ -6566,6 +6561,11 @@ void LLVMStyle<ELFT>::printVersionSymbolSection(const ELFFile<ELFT> *Obj,
   }
 }
 
+static const EnumEntry<unsigned> SymVersionFlags[] = {
+    {"Base", "BASE", VER_FLG_BASE},
+    {"Weak", "WEAK", VER_FLG_WEAK},
+    {"Info", "INFO", VER_FLG_INFO}};
+
 template <class ELFT>
 void LLVMStyle<ELFT>::printVersionDefinitionSection(const ELFFile<ELFT> *Obj,
                                                     const Elf_Shdr *Sec) {