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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/ELF.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>
     25 void printProgramHeaders(
     26     const ELFObjectFile<ELFT> *o) {
     27   typedef ELFObjectFile<ELFT> ELFO;
     28   outs() << "Program Header:\n";
     29   for (typename ELFO::Elf_Phdr_Iter pi = o->begin_program_headers(),
     30                                     pe = o->end_program_headers();
     31                                     pi != pe; ++pi) {
     32     switch (pi->p_type) {
     33     case ELF::PT_LOAD:
     34       outs() << "    LOAD ";
     35       break;
     36     case ELF::PT_GNU_STACK:
     37       outs() << "   STACK ";
     38       break;
     39     case ELF::PT_GNU_EH_FRAME:
     40       outs() << "EH_FRAME ";
     41       break;
     42     case ELF::PT_INTERP:
     43       outs() << "  INTERP ";
     44       break;
     45     case ELF::PT_DYNAMIC:
     46       outs() << " DYNAMIC ";
     47       break;
     48     case ELF::PT_PHDR:
     49       outs() << "    PHDR ";
     50       break;
     51     case ELF::PT_TLS:
     52       outs() << "    TLS ";
     53       break;
     54     default:
     55       outs() << " UNKNOWN ";
     56     }
     57 
     58     const char *Fmt = ELFT::Is64Bits ? "0x%016" PRIx64 " " : "0x%08" PRIx64 " ";
     59 
     60     outs() << "off    "
     61            << format(Fmt, (uint64_t)pi->p_offset)
     62            << "vaddr "
     63            << format(Fmt, (uint64_t)pi->p_vaddr)
     64            << "paddr "
     65            << format(Fmt, (uint64_t)pi->p_paddr)
     66            << format("align 2**%u\n", countTrailingZeros<uint64_t>(pi->p_align))
     67            << "         filesz "
     68            << format(Fmt, (uint64_t)pi->p_filesz)
     69            << "memsz "
     70            << format(Fmt, (uint64_t)pi->p_memsz)
     71            << "flags "
     72            << ((pi->p_flags & ELF::PF_R) ? "r" : "-")
     73            << ((pi->p_flags & ELF::PF_W) ? "w" : "-")
     74            << ((pi->p_flags & ELF::PF_X) ? "x" : "-")
     75            << "\n";
     76   }
     77   outs() << "\n";
     78 }
     79 
     80 void llvm::printELFFileHeader(const object::ObjectFile *Obj) {
     81   // Little-endian 32-bit
     82   if (const ELF32LEObjectFile *ELFObj = dyn_cast<ELF32LEObjectFile>(Obj))
     83     printProgramHeaders(ELFObj);
     84 
     85   // Big-endian 32-bit
     86   if (const ELF32BEObjectFile *ELFObj = dyn_cast<ELF32BEObjectFile>(Obj))
     87     printProgramHeaders(ELFObj);
     88 
     89   // Little-endian 64-bit
     90   if (const ELF64LEObjectFile *ELFObj = dyn_cast<ELF64LEObjectFile>(Obj))
     91     printProgramHeaders(ELFObj);
     92 
     93   // Big-endian 64-bit
     94   if (const ELF64BEObjectFile *ELFObj = dyn_cast<ELF64BEObjectFile>(Obj))
     95     printProgramHeaders(ELFObj);
     96 }
     97