[llvm-readelf] Make llvm-readelf more compatible with GNU readelf.

Summary:
This change adds a bunch of options that GNU readelf supports. There is one breaking change when invoked as `llvm-readobj`, and three breaking changes when invoked as `llvm-readelf`:
 - Add --all (implies --file-header, --program-headers, etc.)
 - [Breaking] -a is --all instead of --arm-attributes
 - Add --file-header as an alias for --file-headers
 - Replace --sections with --sections-headers, keeping --sections as an alias for it
 - Add --relocs as an alias for --relocations
 - Add --dynamic as an alias for --dynamic-table
 - Add --segments as an alias for --program-headers
 - Add --section-groups as an alias for --elf-section-groups
 - Add --dyn-syms as an alias for --dyn-symbols
 - Add --syms as an alias for --symbols
 - Add --histogram as an alias for --elf-hash-histogram
 - [Breaking] When invoked as `llvm-readelf`, -s is --symbols instead of --sections
 - [Breaking] When invoked as `llvm-readelf`, -t is no longer an alias for --symbols

Reviewers: MaskRay, phosek, mcgrathr, jhenderson

Reviewed By: MaskRay, jhenderson

Subscribers: sbc100, aheejin, edd, jhenderson, silvas, echristo, compnerd, kristina, javed.absar, kristof.beyls, llvm-commits, Bigcheese

Differential Revision: https://reviews.llvm.org/D54124

llvm-svn: 346685

1 files changed, 10 insertions, 9 deletions

diff --git a/llvm/tools/llvm-readobj/ELFDumper.cpp b/llvm/tools/llvm-readobj/ELFDumper.cpp
index c91d2c548bf..16a0f0d2e31 100644
--- a/llvm/tools/llvm-readobj/ELFDumper.cpp
+++ b/llvm/tools/llvm-readobj/ELFDumper.cpp
@@ -143,7 +143,7 @@ public:
   ELFDumper(const ELFFile<ELFT> *Obj, ScopedPrinter &Writer);
 
   void printFileHeaders() override;
-  void printSections() override;
+  void printSectionHeaders() override;
   void printRelocations() override;
   void printDynamicRelocations() override;
   void printSymbols() override;
@@ -324,7 +324,7 @@ public:
   virtual void printFileHeaders(const ELFFile<ELFT> *Obj) = 0;
   virtual void printGroupSections(const ELFFile<ELFT> *Obj) = 0;
   virtual void printRelocations(const ELFFile<ELFT> *Obj) = 0;
-  virtual void printSections(const ELFFile<ELFT> *Obj) = 0;
+  virtual void printSectionHeaders(const ELFFile<ELFT> *Obj) = 0;
   virtual void printSymbols(const ELFFile<ELFT> *Obj) = 0;
   virtual void printDynamicSymbols(const ELFFile<ELFT> *Obj) = 0;
   virtual void printDynamicRelocations(const ELFFile<ELFT> *Obj) = 0;
@@ -359,7 +359,7 @@ public:
   void printFileHeaders(const ELFO *Obj) override;
   void printGroupSections(const ELFFile<ELFT> *Obj) override;
   void printRelocations(const ELFO *Obj) override;
-  void printSections(const ELFO *Obj) override;
+  void printSectionHeaders(const ELFO *Obj) override;
   void printSymbols(const ELFO *Obj) override;
   void printDynamicSymbols(const ELFO *Obj) override;
   void printDynamicRelocations(const ELFO *Obj) override;
@@ -452,7 +452,7 @@ public:
   void printGroupSections(const ELFFile<ELFT> *Obj) override;
   void printRelocations(const ELFO *Obj) override;
   void printRelocations(const Elf_Shdr *Sec, const ELFO *Obj);
-  void printSections(const ELFO *Obj) override;
+  void printSectionHeaders(const ELFO *Obj) override;
   void printSymbols(const ELFO *Obj) override;
   void printDynamicSymbols(const ELFO *Obj) override;
   void printDynamicRelocations(const ELFO *Obj) override;
@@ -1592,9 +1592,8 @@ void ELFDumper<ELFT>::printFileHeaders() {
   ELFDumperStyle->printFileHeaders(Obj);
 }
 
-template<class ELFT>
-void ELFDumper<ELFT>::printSections() {
-  ELFDumperStyle->printSections(Obj);
+template <class ELFT> void ELFDumper<ELFT>::printSectionHeaders() {
+  ELFDumperStyle->printSectionHeaders(Obj);
 }
 
 template<class ELFT>
@@ -2920,7 +2919,8 @@ std::string getSectionTypeString(unsigned Arch, unsigned Type) {
   return "";
 }
 
-template <class ELFT> void GNUStyle<ELFT>::printSections(const ELFO *Obj) {
+template <class ELFT>
+void GNUStyle<ELFT>::printSectionHeaders(const ELFO *Obj) {
   size_t SectionIndex = 0;
   std::string Number, Type, Size, Address, Offset, Flags, Link, Info, EntrySize,
       Alignment;
@@ -4213,7 +4213,8 @@ void LLVMStyle<ELFT>::printRelocation(const ELFO *Obj, Elf_Rela Rel,
   }
 }
 
-template <class ELFT> void LLVMStyle<ELFT>::printSections(const ELFO *Obj) {
+template <class ELFT>
+void LLVMStyle<ELFT>::printSectionHeaders(const ELFO *Obj) {
   ListScope SectionsD(W, "Sections");
 
   int SectionIndex = -1;