ELFDump.cpp revision ac97f5ce486d1ca2967607028eacddd860aaddd0 
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
17#include "llvm/Object/ELF.h"
18#include "llvm/Support/Format.h"
19#include "llvm/Support/MathExtras.h"
20#include "llvm/Support/raw_ostream.h"
21
22using namespace llvm;
23using namespace llvm::object;
24
25template<class ELFT>
26void printProgramHeaders(
27    const ELFObjectFile<ELFT> *o) {
28  typedef ELFObjectFile<ELFT> ELFO;
29  outs() << "Program Header:\n";
30  for (typename ELFO::Elf_Phdr_Iter pi = o->begin_program_headers(),
31                                    pe = o->end_program_headers();
32                                    pi != pe; ++pi) {
33    switch (pi->p_type) {
34    case ELF::PT_LOAD:
35      outs() << "    LOAD ";
36      break;
37    case ELF::PT_GNU_STACK:
38      outs() << "   STACK ";
39      break;
40    case ELF::PT_GNU_EH_FRAME:
41      outs() << "EH_FRAME ";
42      break;
43    default:
44      outs() << " UNKNOWN ";
45    }
46
47    const char *Fmt = ELFT::Is64Bits ? "0x%016" PRIx64 " " : "0x%08" PRIx64 " ";
48
49    outs() << "off    "
50           << format(Fmt, (uint64_t)pi->p_offset)
51           << "vaddr "
52           << format(Fmt, (uint64_t)pi->p_vaddr)
53           << "paddr "
54           << format(Fmt, (uint64_t)pi->p_paddr)
55           << format("align 2**%u\n", CountTrailingZeros_64(pi->p_align))
56           << "         filesz "
57           << format(Fmt, (uint64_t)pi->p_filesz)
58           << "memsz "
59           << format(Fmt, (uint64_t)pi->p_memsz)
60           << "flags "
61           << ((pi->p_flags & ELF::PF_R) ? "r" : "-")
62           << ((pi->p_flags & ELF::PF_W) ? "w" : "-")
63           << ((pi->p_flags & ELF::PF_X) ? "x" : "-")
64           << "\n";
65  }
66  outs() << "\n";
67}
68
69void llvm::printELFFileHeader(const object::ObjectFile *Obj) {
70  // Little-endian 32-bit
71  if (const ELFObjectFile<ELFType<support::little, 4, false> > *ELFObj =
72          dyn_cast<ELFObjectFile<ELFType<support::little, 4, false> > >(Obj))
73    printProgramHeaders(ELFObj);
74
75  // Big-endian 32-bit
76  if (const ELFObjectFile<ELFType<support::big, 4, false> > *ELFObj =
77          dyn_cast<ELFObjectFile<ELFType<support::big, 4, false> > >(Obj))
78    printProgramHeaders(ELFObj);
79
80  // Little-endian 64-bit
81  if (const ELFObjectFile<ELFType<support::little, 8, true> > *ELFObj =
82          dyn_cast<ELFObjectFile<ELFType<support::little, 8, true> > >(Obj))
83    printProgramHeaders(ELFObj);
84
85  // Big-endian 64-bit
86  if (const ELFObjectFile<ELFType<support::big, 8, true> > *ELFObj =
87          dyn_cast<ELFObjectFile<ELFType<support::big, 8, true> > >(Obj))
88    printProgramHeaders(ELFObj);
89}
90