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ccee3bcf0b
* Improve comments. * Reorder the assignment to Obj.SectionNames before the symbol table creation code. Add a test. Reviewed By: grimar Differential Revision: https://reviews.llvm.org/D69526
108 lines
3.1 KiB
Plaintext
108 lines
3.1 KiB
Plaintext
## Test --add-symbol creates .symtab if it does not exist.
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# RUN: yaml2obj --docnum=1 %s -o %t
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## If a non-SHF_ALLOC SHT_STRTAB exists but SHT_SYMTAB does not, create .symtab
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## and set its sh_link to the SHT_STRTAB.
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# RUN: llvm-objcopy --remove-section=.symtab %t %t.no.symtab
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# RUN: llvm-objcopy --add-symbol='abs1=1' %t.no.symtab %t.add.both
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# RUN: llvm-readobj -S %t.add.both | FileCheck --check-prefix=SEC %s
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# RUN: llvm-readelf -s %t.add.both | FileCheck %s
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# SEC: Index: 1
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# SEC-NEXT: Name: .strtab
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# SEC-NEXT: Type: SHT_STRTAB
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# SEC: Index: 2
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# SEC-NEXT: Name: .shstrtab
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# SEC-NEXT: Type: SHT_STRTAB
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# SEC: Index: 3
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# SEC-NEXT: Name: .symtab
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# SEC-NEXT: Type: SHT_SYMTAB
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# SEC-NOT: }
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# SEC: Link: 1
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# CHECK: 0: 0000000000000000 0 NOTYPE LOCAL DEFAULT UND
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# CHECK-NEXT: 1: 0000000000000001 0 NOTYPE GLOBAL DEFAULT ABS abs1
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## Don't create .symtab if --add-symbol is not specified.
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# RUN: llvm-objcopy --remove-section=.symtab --remove-section=.strtab %t %t.no
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# RUN: llvm-objcopy %t.no %t.nop
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# RUN: llvm-readobj -S %t.nop | FileCheck --implicit-check-not=.symtab --implicit-check-not=.strtab /dev/null
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## Reuse the existing .shstrtab (section names) for symbol names.
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## This may look strange but it works.
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# RUN: llvm-objcopy --add-symbol='abs1=1' %t.no %t.add.symtab
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# RUN: llvm-readobj -S %t.add.symtab | FileCheck --check-prefix=SEC2 %s --implicit-check-not=.strtab
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# RUN: llvm-readelf -s %t.add.symtab | FileCheck %s
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# SEC2: Index: 1
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# SEC2-NEXT: Name: .shstrtab
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# SEC2-NEXT: Type: SHT_STRTAB
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# SEC2: Index: 2
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# SEC2-NEXT: Name: .symtab
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# SEC2-NEXT: Type: SHT_SYMTAB
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# SEC2-NOT: }
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# SEC2: Link: 1
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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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- 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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Symbols: []
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...
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## Check that we prefer the string table that is not the section header string table.
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# RUN: yaml2obj --docnum=2 %s -o %t2
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# RUN: llvm-objcopy --remove-section=.symtab --remove-section=.strtab %t2 %t2.no
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# RUN: llvm-objcopy --add-symbol='abs1=1' %t2.no %t2.add.symtab
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# RUN: llvm-readobj -S %t2.add.symtab | FileCheck --check-prefix=SEC2 %s
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# RUN: llvm-readelf -s %t2.add.symtab | FileCheck %s
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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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# .shstrtab is reordered before .strtab
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- Name: .shstrtab
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Type: SHT_STRTAB
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- Name: .strtab
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Type: SHT_STRTAB
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Symbols: []
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...
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## Check the created .symtab does not link to .dynstr (SHF_ALLOC).
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# RUN: yaml2obj --docnum=3 %s -o %t3
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# RUN: llvm-objcopy --remove-section=.symtab --remove-section=.strtab %t3 %t3.no
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# RUN: llvm-objcopy --add-symbol='abs1=1' %t3.no %t3.not.dynstr
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# RUN: llvm-readobj -S %t3.not.dynstr | FileCheck --check-prefix=SEC3 %s
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# SEC3: Index: 1
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# SEC3-NEXT: Name: .shstrtab
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# SEC3-NEXT: Type: SHT_STRTAB
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# SEC3: Name: .symtab
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# SEC3-NEXT: Type: SHT_SYMTAB
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# SEC3-NOT: }
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# SEC3: Link: 1
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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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DynamicSymbols:
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- Name: dummy
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Binding: STB_GLOBAL
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Symbols: []
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...
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