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tools: add support for decoding ARM attributes

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Enhance the ARM specific parsing support in llvm-readobj to support attributes.
This allows for simpler tests to validate encoding of the build attributes as
specified in the ARM ELF specification.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200450 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Saleem Abdulrasool
2014-01-30 04:46:33 +00:00
parent 7a38b33dec
commit 459c949777
9 changed files with 1121 additions and 0 deletions
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44
tools/llvm-readobj/ELFDumper.cpp
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@ -13,12 +13,15 @@
//===----------------------------------------------------------------------===//
#include "llvm-readobj.h"
#include "ARMAttributeParser.h"
#include "ARMEHABIPrinter.h"
#include "Error.h"
#include "ObjDumper.h"
#include "StreamWriter.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/Object/ELFObjectFile.h"
#include "llvm/Support/ARMBuildAttributes.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/MathExtras.h"
@ -50,6 +53,8 @@ public:
virtual void printNeededLibraries() LLVM_OVERRIDE;
virtual void printProgramHeaders() LLVM_OVERRIDE;
virtual void printAttributes() LLVM_OVERRIDE;
private:
typedef ELFFile<ELFT> ELFO;
typedef typename ELFO::Elf_Shdr Elf_Shdr;
@ -855,3 +860,42 @@ void ELFDumper<ELFT>::printProgramHeaders() {
W.printNumber("Alignment", PI->p_align);
}
}
template <class ELFT>
void ELFDumper<ELFT>::printAttributes() {
W.startLine() << "Attributes not implemented.\n";
}
namespace {
template <>
void ELFDumper<ELFType<support::little, 2, false> >::printAttributes() {
if (Obj->getHeader()->e_machine != EM_ARM) {
W.startLine() << "Attributes not implemented.\n";
return;
}
DictScope BA(W, "BuildAttributes");
for (typename ELFO::Elf_Shdr_Iter SI = Obj->begin_sections(),
SE = Obj->end_sections(); SI != SE; ++SI) {
if (SI->sh_type != ELF::SHT_ARM_ATTRIBUTES)
continue;
ErrorOr<ArrayRef<uint8_t> > Contents = Obj->getSectionContents(&(*SI));
if (!Contents)
continue;
if ((*Contents)[0] != ARMBuildAttrs::Format_Version) {
errs() << "unrecognised FormatVersion: 0x" << utohexstr((*Contents)[0])
<< '\n';
continue;
}
W.printHex("FormatVersion", (*Contents)[0]);
if (Contents->size() == 1)
continue;
ARMAttributeParser(W).Parse(*Contents);
}
}
}