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38d4353156
This patch tries to resolve problems faced in D68943 and uses some of the code written by Konrad Wilhelm Kleine in that patch. Previously, yaml2obj tool always created a .symtab section. This patch changes that. With it we only create it when have a "Symbols:" tag in the YAML document or when we need to create it because it is used by another section(s). obj2yaml follows the new behavior and does not print "Symbols:" anymore when there is no symbol table. Differential revision: https://reviews.llvm.org/D69041 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@375361 91177308-0d34-0410-b5e6-96231b3b80d8
114 lines
3.5 KiB
Plaintext
114 lines
3.5 KiB
Plaintext
## Check the section header properties of ".dynsym",
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## ".dynstr", ".symtab", ".strtab", ".shstrtab".
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## These sections sections are usually added implicitly,
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## but here we add them explicitly in YAML and verify.
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## We check their order matches YAML and that file offset is
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## ascending. This is a natural default behavior.
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# RUN: yaml2obj --docnum=1 %s -o %t1
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# RUN: llvm-readelf -S %t1 | FileCheck %s
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# CHECK: Section Headers:
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# CHECK-NEXT: [Nr] Name Type Address Off Size
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# CHECK-NEXT: [ 0] NULL 0000000000000000 000000 000000
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# CHECK-NEXT: [ 1] .dynstr STRTAB 0000000000000100 000040 000009
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# CHECK-NEXT: [ 2] .dynsym DYNSYM 0000000000000150 000049 000030
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# CHECK-NEXT: [ 3] .symtab SYMTAB 0000000000000000 000079 000018
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# CHECK-NEXT: [ 4] .strtab STRTAB 0000000000000000 000091 000001
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# CHECK-NEXT: [ 5] .shstrtab STRTAB 0000000000000000 000092 000035
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# CHECK-NEXT: [ 6] .text.foo PROGBITS 0000000000000200 0000c7 000000
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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_DYN
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Machine: EM_X86_64
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Sections:
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- Name: .dynstr
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Type: SHT_STRTAB
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Address: 0x100
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- Name: .dynsym
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Type: SHT_DYNSYM
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Address: 0x150
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- Name: .symtab
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Type: SHT_SYMTAB
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- Name: .strtab
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Type: SHT_STRTAB
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- Name: .shstrtab
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Type: SHT_STRTAB
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- Name: .text.foo
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Type: SHT_PROGBITS
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Address: 0x200
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## Symbol is required for the .dynsym to be generated.
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DynamicSymbols:
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- Name: _Z3fooi
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Binding: STB_GLOBAL
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## Check that yaml2obj creates empty .dynstr and .dynsym sections for
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## the case when no dynamic symbols were specified and Content wasn't set,
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## but the sections were explicitly listed. Check their VAs are correct.
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# RUN: yaml2obj --docnum=2 %s -o %t2
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# RUN: llvm-readelf -S %t2 | FileCheck %s --check-prefix=NODYNSYM
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# NODYNSYM: Section Headers:
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# NODYNSYM-NEXT: [Nr] Name Type Address Off Size
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# NODYNSYM-NEXT: [ 0] NULL 0000000000000000 000000 000000
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# NODYNSYM-NEXT: [ 1] .dynstr STRTAB 0000000000000100 000040 000001
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# NODYNSYM-NEXT: [ 2] .dynsym DYNSYM 0000000000000150 000041 000018
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# NODYNSYM-NEXT: [ 3] .symtab SYMTAB 0000000000000000 000059 000018
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# NODYNSYM-NEXT: [ 4] .strtab STRTAB 0000000000000000 000071 000001
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# NODYNSYM-NEXT: [ 5] .shstrtab STRTAB 0000000000000000 000072 000035
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# NODYNSYM-NEXT: [ 6] .text.foo PROGBITS 0000000000000200 0000a7 000000
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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_DYN
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Machine: EM_X86_64
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Sections:
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- Name: .dynstr
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Type: SHT_STRTAB
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Address: 0x100
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- Name: .dynsym
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Type: SHT_DYNSYM
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Address: 0x150
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- Name: .symtab
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Type: SHT_SYMTAB
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- Name: .strtab
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Type: SHT_STRTAB
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- Name: .shstrtab
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Type: SHT_STRTAB
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- Name: .text.foo
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Type: SHT_PROGBITS
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Address: 0x200
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## Check we don't add a symbol table when no "Symbols" key is specified.
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# RUN: yaml2obj --docnum=3 %s -o %t3
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# RUN: llvm-readelf -S %t3 | FileCheck /dev/null --implicit-check-not=.symtab
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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_DYN
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Machine: EM_X86_64
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## Check we add a symbol table when "Symbols" key is specified.
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# RUN: yaml2obj --docnum=4 %s -o %t4
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# RUN: llvm-readelf -S %t4 | FileCheck %s --check-prefix=SYMTAB
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# SYMTAB: .symtab
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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_DYN
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Machine: EM_X86_64
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Symbols: []
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