/Users/buildslave/jenkins/sharedspace/clang-stage2-coverage-R@2/llvm/lib/Target/BPF/MCTargetDesc/BPFELFObjectWriter.cpp
Line | Count | Source (jump to first uncovered line) |
1 | | //===-- BPFELFObjectWriter.cpp - BPF ELF Writer ---------------------------===// |
2 | | // |
3 | | // The LLVM Compiler Infrastructure |
4 | | // |
5 | | // This file is distributed under the University of Illinois Open Source |
6 | | // License. See LICENSE.TXT for details. |
7 | | // |
8 | | //===----------------------------------------------------------------------===// |
9 | | |
10 | | #include "MCTargetDesc/BPFMCTargetDesc.h" |
11 | | #include "llvm/BinaryFormat/ELF.h" |
12 | | #include "llvm/MC/MCELFObjectWriter.h" |
13 | | #include "llvm/MC/MCFixup.h" |
14 | | #include "llvm/Support/ErrorHandling.h" |
15 | | #include <cstdint> |
16 | | |
17 | | using namespace llvm; |
18 | | |
19 | | namespace { |
20 | | |
21 | | class BPFELFObjectWriter : public MCELFObjectTargetWriter { |
22 | | public: |
23 | | BPFELFObjectWriter(uint8_t OSABI); |
24 | 9 | ~BPFELFObjectWriter() override = default; |
25 | | |
26 | | protected: |
27 | | unsigned getRelocType(MCContext &Ctx, const MCValue &Target, |
28 | | const MCFixup &Fixup, bool IsPCRel) const override; |
29 | | }; |
30 | | |
31 | | } // end anonymous namespace |
32 | | |
33 | | BPFELFObjectWriter::BPFELFObjectWriter(uint8_t OSABI) |
34 | | : MCELFObjectTargetWriter(/*Is64Bit*/ true, OSABI, ELF::EM_BPF, |
35 | 9 | /*HasRelocationAddend*/ false) {} |
36 | | |
37 | | unsigned BPFELFObjectWriter::getRelocType(MCContext &Ctx, const MCValue &Target, |
38 | | const MCFixup &Fixup, |
39 | 57 | bool IsPCRel) const { |
40 | 57 | // determine the type of the relocation |
41 | 57 | switch ((unsigned)Fixup.getKind()) { |
42 | 0 | default: |
43 | 0 | llvm_unreachable("invalid fixup kind!"); |
44 | 3 | case FK_SecRel_8: |
45 | 3 | return ELF::R_BPF_64_64; |
46 | 0 | case FK_SecRel_4: |
47 | 0 | return ELF::R_BPF_64_32; |
48 | 24 | case FK_Data_8: |
49 | 24 | return ELF::R_BPF_64_64; |
50 | 30 | case FK_Data_4: |
51 | 30 | return ELF::R_BPF_64_32; |
52 | 0 | } |
53 | 0 | } |
54 | | |
55 | | MCObjectWriter *llvm::createBPFELFObjectWriter(raw_pwrite_stream &OS, |
56 | 9 | uint8_t OSABI, bool IsLittleEndian) { |
57 | 9 | MCELFObjectTargetWriter *MOTW = new BPFELFObjectWriter(OSABI); |
58 | 9 | return createELFObjectWriter(MOTW, OS, IsLittleEndian); |
59 | 9 | } |