[Mips] Teach llvm-readobj to print MIPS-specific ELF program headers.

The patch reviewed by Michael Spencer.
http://llvm-reviews.chandlerc.com/D1846

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192093 91177308-0d34-0410-b5e6-96231b3b80d8

3 files changed, 68 insertions, 21 deletions

diff --git a/test/Object/Inputs/program-headers.mips b/test/Object/Inputs/program-headers.mips
new file mode 100755
index 0000000000..54ebfea31f
--- /dev/null
+++ b/test/Object/Inputs/program-headers.mips
diff --git a/test/tools/llvm-readobj/program-headers.test b/test/tools/llvm-readobj/program-headers.test
index 2a574bb2e6..7c22f2b529 100644
--- a/test/tools/llvm-readobj/program-headers.test
+++ b/test/tools/llvm-readobj/program-headers.test
@@ -2,6 +2,8 @@ RUN: llvm-readobj -program-headers %p/../../Object/Inputs/program-headers.elf-i3
 RUN:     | FileCheck %s -check-prefix ELF-I386
 RUN: llvm-readobj -program-headers %p/../../Object/Inputs/program-headers.elf-x86-64 \
 RUN:     | FileCheck %s -check-prefix ELF-X86-64
+RUN: llvm-readobj -program-headers %p/../../Object/Inputs/program-headers.mips \
+RUN:     | FileCheck %s -check-prefix ELF-MIPS
 
 ELF-I386:      ProgramHeaders [
 ELF-I386-NEXT:   ProgramHeader {
@@ -72,3 +74,31 @@ ELF-X86-64-NEXT:     ]
 ELF-X86-64-NEXT:     Alignment: 8
 ELF-X86-64-NEXT:   }
 ELF-X86-64-NEXT: ]
+
+ELF-MIPS:      ProgramHeaders [
+ELF-MIPS-NEXT:   ProgramHeader {
+ELF-MIPS-NEXT:     Type: PT_MIPS_REGINFO (0x70000000)
+ELF-MIPS-NEXT:     Offset: 0x74
+ELF-MIPS-NEXT:     VirtualAddress: 0x400074
+ELF-MIPS-NEXT:     PhysicalAddress: 0x400074
+ELF-MIPS-NEXT:     FileSize: 24
+ELF-MIPS-NEXT:     MemSize: 24
+ELF-MIPS-NEXT:     Flags [ (0x4)
+ELF-MIPS-NEXT:       PF_R (0x4)
+ELF-MIPS-NEXT:     ]
+ELF-MIPS-NEXT:     Alignment: 4
+ELF-MIPS-NEXT:   }
+ELF-MIPS-NEXT:   ProgramHeader {
+ELF-MIPS-NEXT:     Type: PT_LOAD (0x1)
+ELF-MIPS-NEXT:     Offset: 0x0
+ELF-MIPS-NEXT:     VirtualAddress: 0x400000
+ELF-MIPS-NEXT:     PhysicalAddress: 0x400000
+ELF-MIPS-NEXT:     FileSize: 160
+ELF-MIPS-NEXT:     MemSize: 160
+ELF-MIPS-NEXT:     Flags [ (0x5)
+ELF-MIPS-NEXT:       PF_R (0x4)
+ELF-MIPS-NEXT:       PF_X (0x1)
+ELF-MIPS-NEXT:     ]
+ELF-MIPS-NEXT:     Alignment: 65536
+ELF-MIPS-NEXT:   }
+ELF-MIPS-NEXT: ]
diff --git a/tools/llvm-readobj/ELFDumper.cpp b/tools/llvm-readobj/ELFDumper.cpp
index ffa0e01425..f384824d5e 100644
--- a/tools/llvm-readobj/ELFDumper.cpp
+++ b/tools/llvm-readobj/ELFDumper.cpp
@@ -391,26 +391,41 @@ static const EnumEntry<unsigned> ElfSectionFlags[] = {
   LLVM_READOBJ_ENUM_ENT(ELF, SHF_MIPS_NOSTRIP    )
 };
 
-static const EnumEntry<unsigned> ElfSegmentTypes[] = {
-  LLVM_READOBJ_ENUM_ENT(ELF, PT_NULL   ),
-  LLVM_READOBJ_ENUM_ENT(ELF, PT_LOAD   ),
-  LLVM_READOBJ_ENUM_ENT(ELF, PT_DYNAMIC),
-  LLVM_READOBJ_ENUM_ENT(ELF, PT_INTERP ),
-  LLVM_READOBJ_ENUM_ENT(ELF, PT_NOTE   ),
-  LLVM_READOBJ_ENUM_ENT(ELF, PT_SHLIB  ),
-  LLVM_READOBJ_ENUM_ENT(ELF, PT_PHDR   ),
-  LLVM_READOBJ_ENUM_ENT(ELF, PT_TLS    ),
-
-  LLVM_READOBJ_ENUM_ENT(ELF, PT_GNU_EH_FRAME),
-  LLVM_READOBJ_ENUM_ENT(ELF, PT_SUNW_EH_FRAME),
-  LLVM_READOBJ_ENUM_ENT(ELF, PT_SUNW_UNWIND),
-
-  LLVM_READOBJ_ENUM_ENT(ELF, PT_GNU_STACK),
-  LLVM_READOBJ_ENUM_ENT(ELF, PT_GNU_RELRO),
-
-  LLVM_READOBJ_ENUM_ENT(ELF, PT_ARM_EXIDX),
-  LLVM_READOBJ_ENUM_ENT(ELF, PT_ARM_UNWIND)
-};
+static const char *getElfSegmentType(unsigned Arch, unsigned Type) {
+  // Check potentially overlapped processor-specific
+  // program header type.
+  switch (Arch) {
+  case ELF::EM_ARM:
+    switch (Type) {
+    LLVM_READOBJ_ENUM_CASE(ELF, PT_ARM_EXIDX);
+    }
+  case ELF::EM_MIPS:
+  case ELF::EM_MIPS_RS3_LE:
+    switch (Type) {
+    LLVM_READOBJ_ENUM_CASE(ELF, PT_MIPS_REGINFO);
+    LLVM_READOBJ_ENUM_CASE(ELF, PT_MIPS_RTPROC);
+    LLVM_READOBJ_ENUM_CASE(ELF, PT_MIPS_OPTIONS);
+    }
+  }
+
+  switch (Type) {
+  LLVM_READOBJ_ENUM_CASE(ELF, PT_NULL   );
+  LLVM_READOBJ_ENUM_CASE(ELF, PT_LOAD   );
+  LLVM_READOBJ_ENUM_CASE(ELF, PT_DYNAMIC);
+  LLVM_READOBJ_ENUM_CASE(ELF, PT_INTERP );
+  LLVM_READOBJ_ENUM_CASE(ELF, PT_NOTE   );
+  LLVM_READOBJ_ENUM_CASE(ELF, PT_SHLIB  );
+  LLVM_READOBJ_ENUM_CASE(ELF, PT_PHDR   );
+  LLVM_READOBJ_ENUM_CASE(ELF, PT_TLS    );
+
+  LLVM_READOBJ_ENUM_CASE(ELF, PT_GNU_EH_FRAME);
+  LLVM_READOBJ_ENUM_CASE(ELF, PT_SUNW_UNWIND);
+
+  LLVM_READOBJ_ENUM_CASE(ELF, PT_GNU_STACK);
+  LLVM_READOBJ_ENUM_CASE(ELF, PT_GNU_RELRO);
+  default: return "";
+  }
+}
 
 static const EnumEntry<unsigned> ElfSegmentFlags[] = {
   LLVM_READOBJ_ENUM_ENT(ELF, PF_X),
@@ -790,7 +805,9 @@ void ELFDumper<ELFT>::printProgramHeaders() {
                                     PE = Obj->end_program_headers();
                                     PI != PE; ++PI) {
     DictScope P(W, "ProgramHeader");
-    W.printEnum  ("Type", PI->p_type, makeArrayRef(ElfSegmentTypes));
+    W.printHex   ("Type",
+                  getElfSegmentType(Obj->getHeader()->e_machine, PI->p_type),
+                  PI->p_type);
     W.printHex   ("Offset", PI->p_offset);
     W.printHex   ("VirtualAddress", PI->p_vaddr);
     W.printHex   ("PhysicalAddress", PI->p_paddr);