mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-23 04:52:54 +02:00
9eed3f671f
Given bar = foo + 4 .long bar MC would eat the 4. GNU as includes it in the relocation. The rule seems to be that a variable that defines a symbol is used in the relocation and one that does not define a symbol is evaluated and the result included in the relocation. Fixing this unfortunately required some other changes: * Since the variable is now evaluated, it would prevent the ELF writer from noticing the weakref marker the elf streamer uses. This patch then replaces that with a VariantKind in MCSymbolRefExpr. * Using VariantKind then requires us to look past other VariantKind to see .weakref bar,foo call bar@PLT doing this also fixes zed = foo +2 call zed@PLT so that is a good thing. * Looking past VariantKind means that the relocation selection has to use the fixup instead of the target. This is a reboot of the previous fixes for MC. I will watch the sanitizer buildbot and wait for a build before adding back the previous fixes. llvm-svn: 204294
60 lines
2.4 KiB
C++
60 lines
2.4 KiB
C++
//===- MCELFSymbolFlags.h - ELF Symbol Flags ----------------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file declares the SymbolFlags used for the ELF target.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_MC_MCELFSYMBOLFLAGS_H
|
|
#define LLVM_MC_MCELFSYMBOLFLAGS_H
|
|
|
|
#include "llvm/Support/ELF.h"
|
|
|
|
// Because all the symbol flags need to be stored in the MCSymbolData
|
|
// 'flags' variable we need to provide shift constants per flag type.
|
|
|
|
namespace llvm {
|
|
enum {
|
|
ELF_STT_Shift = 0, // Shift value for STT_* flags.
|
|
ELF_STB_Shift = 4, // Shift value for STB_* flags.
|
|
ELF_STV_Shift = 8, // Shift value for STV_* flags.
|
|
ELF_STO_Shift = 10, // Shift value for STO_* flags.
|
|
ELF_Other_Shift = 16 // Shift value for llvm local flags,
|
|
// not part of the final object file
|
|
};
|
|
|
|
enum ELFSymbolFlags {
|
|
ELF_STB_Local = (ELF::STB_LOCAL << ELF_STB_Shift),
|
|
ELF_STB_Global = (ELF::STB_GLOBAL << ELF_STB_Shift),
|
|
ELF_STB_Weak = (ELF::STB_WEAK << ELF_STB_Shift),
|
|
ELF_STB_Loproc = (ELF::STB_LOPROC << ELF_STB_Shift),
|
|
ELF_STB_Hiproc = (ELF::STB_HIPROC << ELF_STB_Shift),
|
|
|
|
ELF_STT_Notype = (ELF::STT_NOTYPE << ELF_STT_Shift),
|
|
ELF_STT_Object = (ELF::STT_OBJECT << ELF_STT_Shift),
|
|
ELF_STT_Func = (ELF::STT_FUNC << ELF_STT_Shift),
|
|
ELF_STT_Section = (ELF::STT_SECTION << ELF_STT_Shift),
|
|
ELF_STT_File = (ELF::STT_FILE << ELF_STT_Shift),
|
|
ELF_STT_Common = (ELF::STT_COMMON << ELF_STT_Shift),
|
|
ELF_STT_Tls = (ELF::STT_TLS << ELF_STT_Shift),
|
|
ELF_STT_Loproc = (ELF::STT_LOPROC << ELF_STT_Shift),
|
|
ELF_STT_Hiproc = (ELF::STT_HIPROC << ELF_STT_Shift),
|
|
|
|
ELF_STV_Default = (ELF::STV_DEFAULT << ELF_STV_Shift),
|
|
ELF_STV_Internal = (ELF::STV_INTERNAL << ELF_STV_Shift),
|
|
ELF_STV_Hidden = (ELF::STV_HIDDEN << ELF_STV_Shift),
|
|
ELF_STV_Protected = (ELF::STV_PROTECTED << ELF_STV_Shift),
|
|
|
|
ELF_Other_ThumbFunc = (1 << ELF_Other_Shift)
|
|
};
|
|
|
|
} // end namespace llvm
|
|
|
|
#endif
|