b915d07a8e
1. The path checks ELF header flags to prevent linking of incompatible files. For example we do not allow to link files with different ABI, -mnan flags, some combination of target CPU etc. 2. The patch merge ELF header flags from input object files to put their combination to the generated file. For example, if some input files have EF_MIPS_NOREORDER flag we need to put this flag to the output file header. I use the `parseFile()` (not `canParse()`) method because in case of recognition of incorrect input flags combination we should show detailed error message and stop the linking process and should not try to use another `Reader`. llvm-svn: 221439
80 lines
3.0 KiB
C++
80 lines
3.0 KiB
C++
//===- lib/ReaderWriter/ELF/Mips/MipsTargetHandler.cpp --------------------===//
|
|
//
|
|
// The LLVM Linker
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "ELFFile.h"
|
|
#include "MipsDynamicLibraryWriter.h"
|
|
#include "MipsExecutableWriter.h"
|
|
#include "MipsLinkingContext.h"
|
|
#include "MipsTargetHandler.h"
|
|
|
|
using namespace lld;
|
|
using namespace elf;
|
|
|
|
typedef llvm::object::ELFType<llvm::support::little, 2, false> Mips32ElELFType;
|
|
|
|
MipsTargetHandler::MipsTargetHandler(MipsLinkingContext &ctx)
|
|
: DefaultTargetHandler(ctx), _ctx(ctx),
|
|
_runtimeFile(new MipsRuntimeFile<Mips32ElELFType>(ctx)),
|
|
_targetLayout(new MipsTargetLayout<Mips32ElELFType>(ctx)),
|
|
_relocationHandler(new MipsTargetRelocationHandler(*_targetLayout)) {}
|
|
|
|
std::unique_ptr<Writer> MipsTargetHandler::getWriter() {
|
|
switch (_ctx.getOutputELFType()) {
|
|
case llvm::ELF::ET_EXEC:
|
|
return std::unique_ptr<Writer>(new MipsExecutableWriter<Mips32ElELFType>(
|
|
_ctx, *_targetLayout, _elfFlagsMerger));
|
|
case llvm::ELF::ET_DYN:
|
|
return std::unique_ptr<Writer>(
|
|
new MipsDynamicLibraryWriter<Mips32ElELFType>(_ctx, *_targetLayout,
|
|
_elfFlagsMerger));
|
|
case llvm::ELF::ET_REL:
|
|
llvm_unreachable("TODO: support -r mode");
|
|
default:
|
|
llvm_unreachable("unsupported output type");
|
|
}
|
|
}
|
|
|
|
void MipsTargetHandler::registerRelocationNames(Registry ®istry) {
|
|
registry.addKindTable(Reference::KindNamespace::ELF,
|
|
Reference::KindArch::Mips, kindStrings);
|
|
}
|
|
|
|
const Registry::KindStrings MipsTargetHandler::kindStrings[] = {
|
|
LLD_KIND_STRING_ENTRY(R_MIPS_NONE),
|
|
LLD_KIND_STRING_ENTRY(R_MIPS_32),
|
|
LLD_KIND_STRING_ENTRY(R_MIPS_REL32),
|
|
LLD_KIND_STRING_ENTRY(R_MIPS_26),
|
|
LLD_KIND_STRING_ENTRY(R_MIPS_HI16),
|
|
LLD_KIND_STRING_ENTRY(R_MIPS_LO16),
|
|
LLD_KIND_STRING_ENTRY(R_MIPS_GOT16),
|
|
LLD_KIND_STRING_ENTRY(R_MIPS_CALL16),
|
|
LLD_KIND_STRING_ENTRY(R_MIPS_GPREL32),
|
|
LLD_KIND_STRING_ENTRY(R_MIPS_JALR),
|
|
LLD_KIND_STRING_ENTRY(R_MIPS_TLS_DTPMOD32),
|
|
LLD_KIND_STRING_ENTRY(R_MIPS_TLS_DTPREL32),
|
|
LLD_KIND_STRING_ENTRY(R_MIPS_TLS_GD),
|
|
LLD_KIND_STRING_ENTRY(R_MIPS_TLS_LDM),
|
|
LLD_KIND_STRING_ENTRY(R_MIPS_TLS_GOTTPREL),
|
|
LLD_KIND_STRING_ENTRY(R_MIPS_TLS_TPREL32),
|
|
LLD_KIND_STRING_ENTRY(R_MIPS_TLS_DTPREL_HI16),
|
|
LLD_KIND_STRING_ENTRY(R_MIPS_TLS_DTPREL_LO16),
|
|
LLD_KIND_STRING_ENTRY(R_MIPS_TLS_TPREL_HI16),
|
|
LLD_KIND_STRING_ENTRY(R_MIPS_TLS_TPREL_LO16),
|
|
LLD_KIND_STRING_ENTRY(R_MIPS_COPY),
|
|
LLD_KIND_STRING_ENTRY(R_MIPS_JUMP_SLOT),
|
|
LLD_KIND_STRING_ENTRY(R_MIPS_PC32),
|
|
LLD_KIND_STRING_ENTRY(LLD_R_MIPS_GLOBAL_GOT),
|
|
LLD_KIND_STRING_ENTRY(LLD_R_MIPS_32_HI16),
|
|
LLD_KIND_STRING_ENTRY(LLD_R_MIPS_GLOBAL_26),
|
|
LLD_KIND_STRING_ENTRY(LLD_R_MIPS_HI16),
|
|
LLD_KIND_STRING_ENTRY(LLD_R_MIPS_LO16),
|
|
LLD_KIND_STRING_ENTRY(LLD_R_MIPS_STO_PLT),
|
|
LLD_KIND_STRING_END
|
|
};
|