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dynrelocsec-remove-shlink-reference.test @stableraw · history · blame

# RUN: yaml2obj %s > %t

## Check we cannot remove the .dynsym symbol table because dynamic
## relocation section .rela.dyn still references it via sh_link field.
# RUN: not llvm-objcopy -R .dynsym %t %t2 2>&1 >/dev/null | FileCheck %s --check-prefix=ERR
# ERR: error: Symbol table .dynsym cannot be removed because it is referenced by the relocation section .rela.dyn.

## Check we can remove .dynsym after removing the reference.
# RUN: llvm-objcopy -R .dynsym -R .rela.dyn %t %t2
# RUN: llvm-readelf --sections %t2 | FileCheck %s --implicit-check-not=".dynsym"

## Check we zero out sh_link field and allow producing output with the --allow-broken-links switch.
# RUN: llvm-objcopy -R .dynsym --allow-broken-links %t %t2
# RUN: llvm-readelf --sections %t2 | FileCheck %s --check-prefix=DROP-LINK
# DROP-LINK:     [Nr] Name      Type Address          Off    Size   ES   Flg L
# DROP-LINK:     [ 1] .rela.dyn RELA 0000000000000270 000040 000000 18   A   0
# DROP-LINK-NOT: .dynsym

!ELF
FileHeader:
  Class:           ELFCLASS64
  Data:            ELFDATA2LSB
  Type:            ET_DYN
  Machine:         EM_X86_64
Sections:
  - Name:          .rela.dyn
    Type:          SHT_RELA
    Flags:         [ SHF_ALLOC ]
    Address:       0x0000000000000270
    Link:          .dynsym
    EntSize:       0x0000000000000018
DynamicSymbols:
  - Name:          bar
    Binding:       STB_GLOBAL