diff options
Diffstat (limited to 'contrib/llvm/lib/Target/BPF/MCTargetDesc/BPFELFObjectWriter.cpp')
-rw-r--r-- | contrib/llvm/lib/Target/BPF/MCTargetDesc/BPFELFObjectWriter.cpp | 39 |
1 files changed, 25 insertions, 14 deletions
diff --git a/contrib/llvm/lib/Target/BPF/MCTargetDesc/BPFELFObjectWriter.cpp b/contrib/llvm/lib/Target/BPF/MCTargetDesc/BPFELFObjectWriter.cpp index 32e79d0f527e..057bbf5c3b06 100644 --- a/contrib/llvm/lib/Target/BPF/MCTargetDesc/BPFELFObjectWriter.cpp +++ b/contrib/llvm/lib/Target/BPF/MCTargetDesc/BPFELFObjectWriter.cpp @@ -1,9 +1,8 @@ //===-- 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. +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // //===----------------------------------------------------------------------===// @@ -51,21 +50,33 @@ unsigned BPFELFObjectWriter::getRelocType(MCContext &Ctx, const MCValue &Target, case FK_Data_8: return ELF::R_BPF_64_64; case FK_Data_4: - // .BTF.ext generates FK_Data_4 relocations for - // insn offset by creating temporary labels. - // The insn offset is within the code section and - // already been fulfilled by applyFixup(). No - // further relocation is needed. if (const MCSymbolRefExpr *A = Target.getSymA()) { - if (A->getSymbol().isTemporary()) { - MCSection &Section = A->getSymbol().getSection(); + const MCSymbol &Sym = A->getSymbol(); + + if (Sym.isDefined()) { + MCSection &Section = Sym.getSection(); const MCSectionELF *SectionELF = dyn_cast<MCSectionELF>(&Section); assert(SectionELF && "Null section for reloc symbol"); - // The reloc symbol should be in text section. unsigned Flags = SectionELF->getFlags(); - if ((Flags & ELF::SHF_ALLOC) && (Flags & ELF::SHF_EXECINSTR)) - return ELF::R_BPF_NONE; + + if (Sym.isTemporary()) { + // .BTF.ext generates FK_Data_4 relocations for + // insn offset by creating temporary labels. + // The insn offset is within the code section and + // already been fulfilled by applyFixup(). No + // further relocation is needed. + // The reloc symbol should be in text section. + if ((Flags & ELF::SHF_ALLOC) && (Flags & ELF::SHF_EXECINSTR)) + return ELF::R_BPF_NONE; + } else { + // .BTF generates FK_Data_4 relocations for variable + // offset in DataSec kind. Similar to the above .BTF.ext + // insn offset, no further relocation is needed. + // The reloc symbol should be in data section. + if ((Flags & ELF::SHF_ALLOC) && (Flags & ELF::SHF_WRITE)) + return ELF::R_BPF_NONE; + } } } return ELF::R_BPF_64_32; |