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
21using namespace llvm;
22using namespace llvm::object;
23
24template <class ELFT> void printProgramHeaders(const ELFFile<ELFT> *o) {
25  typedef ELFFile<ELFT> ELFO;
26  outs() << "Program Header:\n";
27  for (const typename ELFO::Elf_Phdr &Phdr : o->program_headers()) {
28    switch (Phdr.p_type) {
29    case ELF::PT_LOAD:
30      outs() << "    LOAD ";
31      break;
32    case ELF::PT_GNU_STACK:
33      outs() << "   STACK ";
34      break;
35    case ELF::PT_GNU_EH_FRAME:
36      outs() << "EH_FRAME ";
37      break;
38    case ELF::PT_INTERP:
39      outs() << "  INTERP ";
40      break;
41    case ELF::PT_DYNAMIC:
42      outs() << " DYNAMIC ";
43      break;
44    case ELF::PT_PHDR:
45      outs() << "    PHDR ";
46      break;
47    case ELF::PT_TLS:
48      outs() << "    TLS ";
49      break;
50    default:
51      outs() << " UNKNOWN ";
52    }
53
54    const char *Fmt = ELFT::Is64Bits ? "0x%016" PRIx64 " " : "0x%08" PRIx64 " ";
55
56    outs() << "off    " << format(Fmt, (uint64_t)Phdr.p_offset) << "vaddr "
57           << format(Fmt, (uint64_t)Phdr.p_vaddr) << "paddr "
58           << format(Fmt, (uint64_t)Phdr.p_paddr)
59           << format("align 2**%u\n",
60                     countTrailingZeros<uint64_t>(Phdr.p_align))
61           << "         filesz " << format(Fmt, (uint64_t)Phdr.p_filesz)
62           << "memsz " << format(Fmt, (uint64_t)Phdr.p_memsz) << "flags "
63           << ((Phdr.p_flags & ELF::PF_R) ? "r" : "-")
64           << ((Phdr.p_flags & ELF::PF_W) ? "w" : "-")
65           << ((Phdr.p_flags & ELF::PF_X) ? "x" : "-") << "\n";
66  }
67  outs() << "\n";
68}
69
70void llvm::printELFFileHeader(const object::ObjectFile *Obj) {
71  // Little-endian 32-bit
72  if (const ELF32LEObjectFile *ELFObj = dyn_cast<ELF32LEObjectFile>(Obj))
73    printProgramHeaders(ELFObj->getELFFile());
74
75  // Big-endian 32-bit
76  if (const ELF32BEObjectFile *ELFObj = dyn_cast<ELF32BEObjectFile>(Obj))
77    printProgramHeaders(ELFObj->getELFFile());
78
79  // Little-endian 64-bit
80  if (const ELF64LEObjectFile *ELFObj = dyn_cast<ELF64LEObjectFile>(Obj))
81    printProgramHeaders(ELFObj->getELFFile());
82
83  // Big-endian 64-bit
84  if (const ELF64BEObjectFile *ELFObj = dyn_cast<ELF64BEObjectFile>(Obj))
85    printProgramHeaders(ELFObj->getELFFile());
86}
87