Report endianness in output of {dwarf, obj}dump

For biendian targets like ARM and AArch64, it is useful to have the
output of the llvm-dwarfdump and llvm-objdump report the endianness
used when the object files were generated.

Patch by Charlie Turner.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218408 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/llvm/Object/ELFObjectFile.h b/include/llvm/Object/ELFObjectFile.h
index ed3c08f6f3276e934ff82ba789a12ede45680f34..2c9c07a48d2f613902dc5ad73971b1de413f4518 100644 (file)
--- a/include/llvm/Object/ELFObjectFile.h
+++ b/include/llvm/Object/ELFObjectFile.h
@@ -855,6 +855,7 @@ uint8_t ELFObjectFile<ELFT>::getBytesInAddress() const {
 
 template <class ELFT>
 StringRef ELFObjectFile<ELFT>::getFileFormatName() const {
+  bool IsLittleEndian = ELFT::TargetEndianness == support::little;
   switch (EF.getHeader()->e_ident[ELF::EI_CLASS]) {
   case ELF::ELFCLASS32:
     switch (EF.getHeader()->e_machine) {
@@ -863,7 +864,7 @@ StringRef ELFObjectFile<ELFT>::getFileFormatName() const {
     case ELF::EM_X86_64:
       return "ELF32-x86-64";
     case ELF::EM_ARM:
-      return "ELF32-arm";
+      return (IsLittleEndian ? "ELF32-arm-little" : "ELF32-arm-big");
     case ELF::EM_HEXAGON:
       return "ELF32-hexagon";
     case ELF::EM_MIPS:
@@ -883,7 +884,7 @@ StringRef ELFObjectFile<ELFT>::getFileFormatName() const {
     case ELF::EM_X86_64:
       return "ELF64-x86-64";
     case ELF::EM_AARCH64:
-      return "ELF64-aarch64";
+      return (IsLittleEndian ? "ELF64-aarch64-little" : "ELF64-aarch64-big");
     case ELF::EM_PPC64:
       return "ELF64-ppc64";
     case ELF::EM_S390:

diff --git a/test/tools/llvm-dwarfdump/AArch64/big-endian-dump.ll b/test/tools/llvm-dwarfdump/AArch64/big-endian-dump.ll
index 7c1524e02b5cf36a813182f02d2884db66981f97..7c5315a33e36009439acbd47a8881ce6c906f786 100644 (file)
--- a/test/tools/llvm-dwarfdump/AArch64/big-endian-dump.ll
+++ b/test/tools/llvm-dwarfdump/AArch64/big-endian-dump.ll
@@ -1,5 +1,7 @@
 ; RUN: llc -O0 -filetype=obj -o %t1 < %s
-; RUN: llvm-dwarfdump %t1
+; RUN: llvm-dwarfdump %t1 | FileCheck %s
+
+; CHECK: file format ELF64-aarch64-big 
 
 target datalayout = "E-m:e-i64:64-i128:128-n32:64-S128"
 target triple = "aarch64_be-none--eabi"

diff --git a/test/tools/llvm-dwarfdump/AArch64/little-endian-dump.ll b/test/tools/llvm-dwarfdump/AArch64/little-endian-dump.ll
new file mode 100644 (file)
index 0000000..4367012
--- /dev/null
+++ b/test/tools/llvm-dwarfdump/AArch64/little-endian-dump.ll
@@ -0,0 +1,18 @@
+; RUN: llc -O0 -filetype=obj -o %t1 < %s
+; RUN: llvm-dwarfdump %t1 | FileCheck %s
+
+; CHECK: file format ELF64-aarch64-little
+
+target datalayout = "e-m:e-i64:64-i128:128-n32:64-S128"
+target triple = "aarch64-none--eabi"
+
+!llvm.dbg.cu = !{!0}
+!llvm.module.flags = !{!3, !4}
+!llvm.ident = !{!5}
+
+!0 = metadata !{i32 786449, metadata !1, i32 12, metadata !"clang version 3.6.0 ", i1 false, metadata !"", i32 0, metadata !2, metadata !2, metadata !2, metadata !2, metadata !2, metadata !"", i32 1} ; [ DW_TAG_compile_unit ] [/a/empty.c] [DW_LANG_C99]
+!1 = metadata !{metadata !"empty.c", metadata !"/a"}
+!2 = metadata !{}
+!3 = metadata !{i32 2, metadata !"Dwarf Version", i32 4}
+!4 = metadata !{i32 2, metadata !"Debug Info Version", i32 1}
+!5 = metadata !{metadata !"clang version 3.6.0 "}

diff --git a/test/tools/llvm-dwarfdump/ARM/big-endian-dump.ll b/test/tools/llvm-dwarfdump/ARM/big-endian-dump.ll
index b7f962d5f16e5d88bd3b7cab0705fed5c6cb248b..8c29104bc5d9aedfaa84de863602a8ec5fac82a4 100644 (file)
--- a/test/tools/llvm-dwarfdump/ARM/big-endian-dump.ll
+++ b/test/tools/llvm-dwarfdump/ARM/big-endian-dump.ll
@@ -1,5 +1,7 @@
 ; RUN: llc -O0 -filetype=obj -o %t1 < %s
-; RUN: llvm-dwarfdump %t1
+; RUN: llvm-dwarfdump %t1 | FileCheck %s
+
+; CHECK: file format ELF32-arm-big
 
 target datalayout = "E-m:e-p:32:32-i64:64-v128:64:128-n32-S64"
 target triple = "armebv8-none--eabi"

diff --git a/test/tools/llvm-dwarfdump/ARM/little-endian-dump.ll b/test/tools/llvm-dwarfdump/ARM/little-endian-dump.ll
new file mode 100644 (file)
index 0000000..f7936c1
--- /dev/null
+++ b/test/tools/llvm-dwarfdump/ARM/little-endian-dump.ll
@@ -0,0 +1,20 @@
+; RUN: llc -O0 -filetype=obj -o %t1 < %s
+; RUN: llvm-dwarfdump %t1 | FileCheck %s
+
+; CHECK: file format ELF32-arm-little
+
+target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-n32-S64"
+target triple = "armv8-none--eabi"
+
+!llvm.dbg.cu = !{!0}
+!llvm.module.flags = !{!3, !4, !5, !6}
+!llvm.ident = !{!7}
+
+!0 = metadata !{i32 786449, metadata !1, i32 12, metadata !"clang version 3.6.0 ", i1 false, metadata !"", i32 0, metadata !2, metadata !2, metadata !2, metadata !2, metadata !2, metadata !"", i32 1} ; [ DW_TAG_compile_unit ] [/a/empty.c] [DW_LANG_C99]
+!1 = metadata !{metadata !"empty.c", metadata !"/a"}
+!2 = metadata !{}
+!3 = metadata !{i32 2, metadata !"Dwarf Version", i32 4}
+!4 = metadata !{i32 2, metadata !"Debug Info Version", i32 1}
+!5 = metadata !{i32 1, metadata !"wchar_size", i32 4}
+!6 = metadata !{i32 1, metadata !"min_enum_size", i32 4}
+!7 = metadata !{metadata !"clang version 3.6.0 "}