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llvm-mirror/tools/llvm-readobj/Error.cpp
Eric Christopher df46cef31b Implements low-level object file format specific output for COFF and
ELF with support for:

- File headers
- Section headers + data
- Relocations
- Symbols
- Unwind data (only COFF/Win64)

The output format follows a few rules:
- Values are almost always output one per line (as elf-dump/coff-dump already do). - Many values are translated to something readable (like enum names), with the raw value in parentheses.
- Hex numbers are output in uppercase, prefixed with "0x".
- Flags are sorted alphabetically.
- Lists and groups are always delimited.

Example output:
---------- snip ----------
Sections [
  Section {
    Index: 1
    Name: .text (5)
    Type: SHT_PROGBITS (0x1)
    Flags [ (0x6)
      SHF_ALLOC (0x2)
      SHF_EXECINSTR (0x4)
    ]
    Address: 0x0
    Offset: 0x40
    Size: 33
    Link: 0
    Info: 0
    AddressAlignment: 16
    EntrySize: 0
    Relocations [
      0x6 R_386_32 .rodata.str1.1 0x0
      0xB R_386_PC32 puts 0x0
      0x12 R_386_32 .rodata.str1.1 0x0
      0x17 R_386_PC32 puts 0x0
    ]
    SectionData (
      0000: 83EC04C7 04240000 0000E8FC FFFFFFC7  |.....$..........|
      0010: 04240600 0000E8FC FFFFFF31 C083C404  |.$.........1....|
      0020: C3                                   |.|
    )
  }
]
---------- snip ----------

Relocations and symbols can be output standalone or together with the section header as displayed in the example.
This feature set supports all tests in test/MC/COFF and test/MC/ELF (and I suspect all additional tests using elf-dump), making elf-dump and coff-dump deprecated.

Patch by Nico Rieck!

llvm-svn: 178679
2013-04-03 18:31:38 +00:00

63 lines
1.8 KiB
C++

//===- Error.cpp - system_error extensions for llvm-readobj -----*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This defines a new error_category for the llvm-readobj tool.
//
//===----------------------------------------------------------------------===//
#include "Error.h"
#include "llvm/Support/ErrorHandling.h"
using namespace llvm;
namespace {
class _readobj_error_category : public _do_message {
public:
virtual const char* name() const;
virtual std::string message(int ev) const;
virtual error_condition default_error_condition(int ev) const;
};
} // namespace
const char *_readobj_error_category::name() const {
return "llvm.readobj";
}
std::string _readobj_error_category::message(int ev) const {
switch (ev) {
case readobj_error::success: return "Success";
case readobj_error::file_not_found:
return "No such file.";
case readobj_error::unsupported_file_format:
return "The file was not recognized as a valid object file.";
case readobj_error::unrecognized_file_format:
return "Unrecognized file type.";
case readobj_error::unsupported_obj_file_format:
return "Unsupported object file format.";
case readobj_error::unknown_symbol:
return "Unknown symbol.";
default:
llvm_unreachable("An enumerator of readobj_error does not have a message "
"defined.");
}
}
error_condition _readobj_error_category::default_error_condition(int ev) const {
if (ev == readobj_error::success)
return errc::success;
return errc::invalid_argument;
}
namespace llvm {
const error_category &readobj_category() {
static _readobj_error_category o;
return o;
}
} // namespace llvm