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llvm-mirror/include/llvm/Support/Win64EH.h
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

146 lines
4.5 KiB
C++

//===-- llvm/Support/Win64EH.h ---Win64 EH Constants-------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains constants and structures used for implementing
// exception handling on Win64 platforms. For more information, see
// http://msdn.microsoft.com/en-us/library/1eyas8tf.aspx
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_SUPPORT_WIN64EH_H
#define LLVM_SUPPORT_WIN64EH_H
#include "llvm/Support/DataTypes.h"
#include "llvm/Support/Endian.h"
namespace llvm {
namespace Win64EH {
/// UnwindOpcodes - Enumeration whose values specify a single operation in
/// the prolog of a function.
enum UnwindOpcodes {
UOP_PushNonVol = 0,
UOP_AllocLarge,
UOP_AllocSmall,
UOP_SetFPReg,
UOP_SaveNonVol,
UOP_SaveNonVolBig,
UOP_SaveXMM128 = 8,
UOP_SaveXMM128Big,
UOP_PushMachFrame
};
/// UnwindCode - This union describes a single operation in a function prolog,
/// or part thereof.
union UnwindCode {
struct {
support::ulittle8_t CodeOffset;
support::ulittle8_t UnwindOpAndOpInfo;
} u;
support::ulittle16_t FrameOffset;
uint8_t getUnwindOp() const {
return u.UnwindOpAndOpInfo & 0x0F;
}
uint8_t getOpInfo() const {
return (u.UnwindOpAndOpInfo >> 4) & 0x0F;
}
};
enum {
/// UNW_ExceptionHandler - Specifies that this function has an exception
/// handler.
UNW_ExceptionHandler = 0x01,
/// UNW_TerminateHandler - Specifies that this function has a termination
/// handler.
UNW_TerminateHandler = 0x02,
/// UNW_ChainInfo - Specifies that this UnwindInfo structure is chained to
/// another one.
UNW_ChainInfo = 0x04
};
/// RuntimeFunction - An entry in the table of functions with unwind info.
struct RuntimeFunction {
support::ulittle32_t StartAddress;
support::ulittle32_t EndAddress;
support::ulittle32_t UnwindInfoOffset;
};
/// UnwindInfo - An entry in the exception table.
struct UnwindInfo {
support::ulittle8_t VersionAndFlags;
support::ulittle8_t PrologSize;
support::ulittle8_t NumCodes;
support::ulittle8_t FrameRegisterAndOffset;
UnwindCode UnwindCodes[1];
uint8_t getVersion() const {
return VersionAndFlags & 0x07;
}
uint8_t getFlags() const {
return (VersionAndFlags >> 3) & 0x1f;
}
uint8_t getFrameRegister() const {
return FrameRegisterAndOffset & 0x0f;
}
uint8_t getFrameOffset() const {
return (FrameRegisterAndOffset >> 4) & 0x0f;
}
// The data after unwindCodes depends on flags.
// If UNW_ExceptionHandler or UNW_TerminateHandler is set then follows
// the address of the language-specific exception handler.
// If UNW_ChainInfo is set then follows a RuntimeFunction which defines
// the chained unwind info.
// For more information please see MSDN at:
// http://msdn.microsoft.com/en-us/library/ddssxxy8.aspx
/// \brief Return pointer to language specific data part of UnwindInfo.
void *getLanguageSpecificData() {
return reinterpret_cast<void *>(&UnwindCodes[(NumCodes+1) & ~1]);
}
/// \brief Return pointer to language specific data part of UnwindInfo.
const void *getLanguageSpecificData() const {
return reinterpret_cast<const void *>(&UnwindCodes[(NumCodes+1) & ~1]);
}
/// \brief Return image-relative offset of language-specific exception handler.
uint32_t getLanguageSpecificHandlerOffset() const {
return *reinterpret_cast<const uint32_t *>(getLanguageSpecificData());
}
/// \brief Set image-relative offset of language-specific exception handler.
void setLanguageSpecificHandlerOffset(uint32_t offset) {
*reinterpret_cast<uint32_t *>(getLanguageSpecificData()) = offset;
}
/// \brief Return pointer to exception-specific data.
void *getExceptionData() {
return reinterpret_cast<void *>(reinterpret_cast<uint32_t *>(
getLanguageSpecificData())+1);
}
/// \brief Return pointer to chained unwind info.
RuntimeFunction *getChainedFunctionEntry() {
return reinterpret_cast<RuntimeFunction *>(getLanguageSpecificData());
}
/// \brief Return pointer to chained unwind info.
const RuntimeFunction *getChainedFunctionEntry() const {
return reinterpret_cast<const RuntimeFunction *>(getLanguageSpecificData());
}
};
} // End of namespace Win64EH
} // End of namespace llvm
#endif