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      1 //===-- ELFDump.cpp - ELF-specific dumper -----------------------*- C++ -*-===//
      2 //
      3 //                     The LLVM Compiler Infrastructure
      4 //
      5 // This file is distributed under the University of Illinois Open Source
      6 // License. See LICENSE.TXT for details.
      7 //
      8 //===----------------------------------------------------------------------===//
      9 ///
     10 /// \file
     11 /// \brief This file implements the ELF-specific dumper for llvm-objdump.
     12 ///
     13 //===----------------------------------------------------------------------===//
     14 
     15 #include "llvm-objdump.h"
     16 #include "llvm/Object/ELFObjectFile.h"
     17 #include "llvm/Support/Format.h"
     18 #include "llvm/Support/MathExtras.h"
     19 #include "llvm/Support/raw_ostream.h"
     20 
     21 using namespace llvm;
     22 using namespace llvm::object;
     23 
     24 template <class ELFT> void printProgramHeaders(const ELFFile<ELFT> *o) {
     25   typedef ELFFile<ELFT> ELFO;
     26   outs() << "Program Header:\n";
     27   for (typename ELFO::Elf_Phdr_Iter pi = o->begin_program_headers(),
     28                                     pe = o->end_program_headers();
     29                                     pi != pe; ++pi) {
     30     switch (pi->p_type) {
     31     case ELF::PT_LOAD:
     32       outs() << "    LOAD ";
     33       break;
     34     case ELF::PT_GNU_STACK:
     35       outs() << "   STACK ";
     36       break;
     37     case ELF::PT_GNU_EH_FRAME:
     38       outs() << "EH_FRAME ";
     39       break;
     40     case ELF::PT_INTERP:
     41       outs() << "  INTERP ";
     42       break;
     43     case ELF::PT_DYNAMIC:
     44       outs() << " DYNAMIC ";
     45       break;
     46     case ELF::PT_PHDR:
     47       outs() << "    PHDR ";
     48       break;
     49     case ELF::PT_TLS:
     50       outs() << "    TLS ";
     51       break;
     52     default:
     53       outs() << " UNKNOWN ";
     54     }
     55 
     56     const char *Fmt = ELFT::Is64Bits ? "0x%016" PRIx64 " " : "0x%08" PRIx64 " ";
     57 
     58     outs() << "off    "
     59            << format(Fmt, (uint64_t)pi->p_offset)
     60            << "vaddr "
     61            << format(Fmt, (uint64_t)pi->p_vaddr)
     62            << "paddr "
     63            << format(Fmt, (uint64_t)pi->p_paddr)
     64            << format("align 2**%u\n", countTrailingZeros<uint64_t>(pi->p_align))
     65            << "         filesz "
     66            << format(Fmt, (uint64_t)pi->p_filesz)
     67            << "memsz "
     68            << format(Fmt, (uint64_t)pi->p_memsz)
     69            << "flags "
     70            << ((pi->p_flags & ELF::PF_R) ? "r" : "-")
     71            << ((pi->p_flags & ELF::PF_W) ? "w" : "-")
     72            << ((pi->p_flags & ELF::PF_X) ? "x" : "-")
     73            << "\n";
     74   }
     75   outs() << "\n";
     76 }
     77 
     78 void llvm::printELFFileHeader(const object::ObjectFile *Obj) {
     79   // Little-endian 32-bit
     80   if (const ELF32LEObjectFile *ELFObj = dyn_cast<ELF32LEObjectFile>(Obj))
     81     printProgramHeaders(ELFObj->getELFFile());
     82 
     83   // Big-endian 32-bit
     84   if (const ELF32BEObjectFile *ELFObj = dyn_cast<ELF32BEObjectFile>(Obj))
     85     printProgramHeaders(ELFObj->getELFFile());
     86 
     87   // Little-endian 64-bit
     88   if (const ELF64LEObjectFile *ELFObj = dyn_cast<ELF64LEObjectFile>(Obj))
     89     printProgramHeaders(ELFObj->getELFFile());
     90 
     91   // Big-endian 64-bit
     92   if (const ELF64BEObjectFile *ELFObj = dyn_cast<ELF64BEObjectFile>(Obj))
     93     printProgramHeaders(ELFObj->getELFFile());
     94 }
     95