From 6e07e9305b1043350d576faf0b75ad6c3c547c19 Mon Sep 17 00:00:00 2001
From: Simon Atanasyan <simon@atanasyan.com>
Date: Tue, 16 Jun 2015 21:47:43 +0000
Subject: [PATCH] [llvm-readobj] Print MIPS .reginfo section content

llvm-svn: 239856
---
 .../llvm-readobj/Inputs/reginfo.obj.elf-mipsel     | Bin 0 -> 490 bytes
 llvm/test/tools/llvm-readobj/mips-reginfo.test     |  10 ++++++++
 llvm/tools/llvm-readobj/ELFDumper.cpp              |  28 +++++++++++++++++++++
 llvm/tools/llvm-readobj/ObjDumper.h                |   1 +
 llvm/tools/llvm-readobj/llvm-readobj.cpp           |   6 +++++
 5 files changed, 45 insertions(+)
 create mode 100644 llvm/test/tools/llvm-readobj/Inputs/reginfo.obj.elf-mipsel
 create mode 100644 llvm/test/tools/llvm-readobj/mips-reginfo.test

diff --git a/llvm/test/tools/llvm-readobj/Inputs/reginfo.obj.elf-mipsel b/llvm/test/tools/llvm-readobj/Inputs/reginfo.obj.elf-mipsel
new file mode 100644
index 0000000000000000000000000000000000000000..5cd09809f8bb52dacb3bff3f294001fbcc71e561
GIT binary patch
literal 490
zcma)2yAFat5S#-<N@8U!t&9bs@E5eQps@FmAX=yduF#5K;uHKMJ8O4<3t+`0ce^t?
zw|jTRdb?3d!9c-7%Yc;>93Lqouz-tEl?~a(Vse4hYRsWDo^}p8P0o2-;;j$~F*OQ)
zEn_ax^rCbSUnG%Un}UGenJmMpmE!Z5G~g_P-mdR0g=JN#H{<I__$riL&iqsSE5o?m
w`)S_A>M6XR`E9;&!q@MU6uYn;5a{@+5oB?4y`LWl@=LBWeLP8K;_F8K1MiC&qyPW_

literal 0
HcmV?d00001

diff --git a/llvm/test/tools/llvm-readobj/mips-reginfo.test b/llvm/test/tools/llvm-readobj/mips-reginfo.test
new file mode 100644
index 0000000..d983d0a
--- /dev/null
+++ b/llvm/test/tools/llvm-readobj/mips-reginfo.test
@@ -0,0 +1,10 @@
+RUN: llvm-readobj -mips-reginfo %p/Inputs/reginfo.obj.elf-mipsel | FileCheck %s
+
+CHECK:      MIPS RegInfo {
+CHECK-NEXT:   GP: 0x7FEF
+CHECK-NEXT:   General Mask: 0xB00001F6
+CHECK-NEXT:   Co-Proc Mask0: 0x0
+CHECK-NEXT:   Co-Proc Mask1: 0x0
+CHECK-NEXT:   Co-Proc Mask2: 0x0
+CHECK-NEXT:   Co-Proc Mask3: 0x0
+CHECK-NEXT: }
diff --git a/llvm/tools/llvm-readobj/ELFDumper.cpp b/llvm/tools/llvm-readobj/ELFDumper.cpp
index 85363f1..3a1f1dd 100644
--- a/llvm/tools/llvm-readobj/ELFDumper.cpp
+++ b/llvm/tools/llvm-readobj/ELFDumper.cpp
@@ -58,6 +58,7 @@ public:
   void printAttributes() override;
   void printMipsPLTGOT() override;
   void printMipsABIFlags() override;
+  void printMipsReginfo() override;
 
 private:
   typedef ELFFile<ELFT> ELFO;
@@ -1424,3 +1425,30 @@ template <class ELFT> void ELFDumper<ELFT>::printMipsABIFlags() {
   W.printFlags("Flags 1", Flags->flags1, makeArrayRef(ElfMipsFlags1));
   W.printHex("Flags 2", Flags->flags2);
 }
+
+template <class ELFT> void ELFDumper<ELFT>::printMipsReginfo() {
+  const Elf_Shdr *Shdr = findSectionByName(*Obj, ".reginfo");
+  if (!Shdr) {
+    W.startLine() << "There is no .reginfo section in the file.\n";
+    return;
+  }
+  ErrorOr<ArrayRef<uint8_t>> Sec = Obj->getSectionContents(Shdr);
+  if (!Sec) {
+    W.startLine() << "The .reginfo section is empty.\n";
+    return;
+  }
+  if (Sec->size() != sizeof(Elf_Mips_RegInfo<ELFT>)) {
+    W.startLine() << "The .reginfo section has a wrong size.\n";
+    return;
+  }
+
+  auto *Reginfo = reinterpret_cast<const Elf_Mips_RegInfo<ELFT> *>(Sec->data());
+
+  DictScope GS(W, "MIPS RegInfo");
+  W.printHex("GP", Reginfo->ri_gp_value);
+  W.printHex("General Mask", Reginfo->ri_gprmask);
+  W.printHex("Co-Proc Mask0", Reginfo->ri_cprmask[0]);
+  W.printHex("Co-Proc Mask1", Reginfo->ri_cprmask[1]);
+  W.printHex("Co-Proc Mask2", Reginfo->ri_cprmask[2]);
+  W.printHex("Co-Proc Mask3", Reginfo->ri_cprmask[3]);
+}
diff --git a/llvm/tools/llvm-readobj/ObjDumper.h b/llvm/tools/llvm-readobj/ObjDumper.h
index 5750d6f..323f5e3 100644
--- a/llvm/tools/llvm-readobj/ObjDumper.h
+++ b/llvm/tools/llvm-readobj/ObjDumper.h
@@ -43,6 +43,7 @@ public:
   // Only implemented for MIPS ELF at this time.
   virtual void printMipsPLTGOT() { }
   virtual void printMipsABIFlags() { }
+  virtual void printMipsReginfo() { }
 
   // Only implemented for PE/COFF.
   virtual void printCOFFImports() { }
diff --git a/llvm/tools/llvm-readobj/llvm-readobj.cpp b/llvm/tools/llvm-readobj/llvm-readobj.cpp
index be7bbe9..f960796 100644
--- a/llvm/tools/llvm-readobj/llvm-readobj.cpp
+++ b/llvm/tools/llvm-readobj/llvm-readobj.cpp
@@ -152,6 +152,10 @@ namespace opts {
   cl::opt<bool> MipsABIFlags("mips-abi-flags",
                              cl::desc("Display the MIPS.abiflags section"));
 
+  // -mips-reginfo
+  cl::opt<bool> MipsReginfo("mips-reginfo",
+                            cl::desc("Display the MIPS .reginfo section"));
+
   // -coff-imports
   cl::opt<bool>
   COFFImports("coff-imports", cl::desc("Display the PE/COFF import table"));
@@ -296,6 +300,8 @@ static void dumpObject(const ObjectFile *Obj) {
       Dumper->printMipsPLTGOT();
     if (opts::MipsABIFlags)
       Dumper->printMipsABIFlags();
+    if (opts::MipsReginfo)
+      Dumper->printMipsReginfo();
   }
   if (opts::COFFImports)
     Dumper->printCOFFImports();
-- 
2.7.4