7ab125dbf3
- teach RelocVisitor to recognize bpf relocations - fix AsmInfo->PointerSize to make sure dwarf is emitted correctly - add a test for the above Signed-off-by: Alexei Starovoitov <ast@kernel.org> llvm-svn: 287521
59 lines
1.8 KiB
C++
59 lines
1.8 KiB
C++
//===-- BPFELFObjectWriter.cpp - BPF ELF Writer ---------------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "MCTargetDesc/BPFMCTargetDesc.h"
|
|
#include "llvm/MC/MCELFObjectWriter.h"
|
|
#include "llvm/MC/MCFixup.h"
|
|
#include "llvm/Support/ErrorHandling.h"
|
|
|
|
using namespace llvm;
|
|
|
|
namespace {
|
|
class BPFELFObjectWriter : public MCELFObjectTargetWriter {
|
|
public:
|
|
BPFELFObjectWriter(uint8_t OSABI);
|
|
|
|
~BPFELFObjectWriter() override;
|
|
|
|
protected:
|
|
unsigned getRelocType(MCContext &Ctx, const MCValue &Target,
|
|
const MCFixup &Fixup, bool IsPCRel) const override;
|
|
};
|
|
}
|
|
|
|
BPFELFObjectWriter::BPFELFObjectWriter(uint8_t OSABI)
|
|
: MCELFObjectTargetWriter(/*Is64Bit*/ true, OSABI, ELF::EM_BPF,
|
|
/*HasRelocationAddend*/ false) {}
|
|
|
|
BPFELFObjectWriter::~BPFELFObjectWriter() {}
|
|
|
|
unsigned BPFELFObjectWriter::getRelocType(MCContext &Ctx, const MCValue &Target,
|
|
const MCFixup &Fixup,
|
|
bool IsPCRel) const {
|
|
// determine the type of the relocation
|
|
switch ((unsigned)Fixup.getKind()) {
|
|
default:
|
|
llvm_unreachable("invalid fixup kind!");
|
|
case FK_SecRel_8:
|
|
return ELF::R_BPF_64_64;
|
|
case FK_SecRel_4:
|
|
return ELF::R_BPF_64_32;
|
|
case FK_Data_8:
|
|
return ELF::R_BPF_64_64;
|
|
case FK_Data_4:
|
|
return ELF::R_BPF_64_32;
|
|
}
|
|
}
|
|
|
|
MCObjectWriter *llvm::createBPFELFObjectWriter(raw_pwrite_stream &OS,
|
|
uint8_t OSABI, bool IsLittleEndian) {
|
|
MCELFObjectTargetWriter *MOTW = new BPFELFObjectWriter(OSABI);
|
|
return createELFObjectWriter(MOTW, OS, IsLittleEndian);
|
|
}
|