forked from OSchip/llvm-project
[yaml2obj] - Add a way to set sh_entsize for relocation sections.
We are missing ability to override the sh_entsize field for SHT_REL[A] sections. It would be useful for writing test cases. Differential revision: https://reviews.llvm.org/D73621
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@ -796,8 +796,12 @@ void ELFState<ELFT>::writeSectionContent(
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"Section type is not SHT_REL nor SHT_RELA");
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bool IsRela = Section.Type == llvm::ELF::SHT_RELA;
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SHeader.sh_entsize = IsRela ? sizeof(Elf_Rela) : sizeof(Elf_Rel);
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SHeader.sh_size = SHeader.sh_entsize * Section.Relocations.size();
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if (Section.EntSize)
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SHeader.sh_entsize = *Section.EntSize;
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else
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SHeader.sh_entsize = IsRela ? sizeof(Elf_Rela) : sizeof(Elf_Rel);
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SHeader.sh_size = (IsRela ? sizeof(Elf_Rela) : sizeof(Elf_Rel)) *
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Section.Relocations.size();
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// For relocation section set link to .symtab by default.
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unsigned Link = 0;
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@ -0,0 +1,73 @@
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## Test how yaml2obj sets values for sh_entsize fields of relocation sections.
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# RUN: yaml2obj --docnum=1 %s -o %t64
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# RUN: llvm-readelf --sections %t64 | FileCheck %s --check-prefix=ELF64
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# RUN: yaml2obj --docnum=2 %s -o %t32
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# RUN: llvm-readelf --sections %t32 | FileCheck %s --check-prefix=ELF32
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# ELF64: Name Type Address Off Size ES
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# ELF64: .rela.default RELA 0000000000000000 000040 000000 18
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# ELF64: .rel.default REL 0000000000000000 000040 000000 10
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# ELF64: .relr.default RELR 0000000000000000 000040 000000 08
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# ELF64: .rela.custom RELA 0000000000000000 000040 000000 ff
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# ELF64: .rel.custom REL 0000000000000000 000040 000000 ff
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# ELF64: .relr.custom RELR 0000000000000000 000040 000000 ff
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# ELF32: Name Type Address Off Size ES
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# ELF32: .rela.default RELA 00000000 000034 000000 0c
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# ELF32: .rel.default REL 00000000 000034 000000 08
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# ELF32: .relr.default RELR 00000000 000034 000000 04
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# ELF32: .rela.custom RELA 00000000 000034 000000 ff
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# ELF32: .rel.custom REL 00000000 000034 000000 ff
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# ELF32: .relr.custom RELR 00000000 000034 000000 ff
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--- !ELF
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FileHeader:
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Class: ELFCLASS64
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Data: ELFDATA2LSB
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Type: ET_REL
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Machine: EM_X86_64
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Sections:
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## Check default sh_entsize field values.
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- Name: .rela.default
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Type: SHT_RELA
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- Name: .rel.default
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Type: SHT_REL
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- Name: .relr.default
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Type: SHT_RELR
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## Check we can set sh_entsize fields to arbitrary values.
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- Name: .rela.custom
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Type: SHT_RELA
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EntSize: 0xFF
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- Name: .rel.custom
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Type: SHT_REL
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EntSize: 0xFF
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- Name: .relr.custom
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Type: SHT_RELR
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EntSize: 0xFF
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--- !ELF
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FileHeader:
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Class: ELFCLASS32
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Data: ELFDATA2LSB
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Type: ET_REL
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Machine: EM_386
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Sections:
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## Check default sh_entsizes field values.
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- Name: .rela.default
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Type: SHT_RELA
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- Name: .rel.default
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Type: SHT_REL
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- Name: .relr.default
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Type: SHT_RELR
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## Check we can set sh_entsize fields to arbitrary values.
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- Name: .rela.custom
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Type: SHT_RELA
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EntSize: 0xFF
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- Name: .rel.custom
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Type: SHT_REL
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EntSize: 0xFF
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- Name: .relr.custom
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Type: SHT_RELR
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EntSize: 0xFF
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