add-symbol-new-symtab.test 1.68 KB
## Show that llvm-objcopy can replace the symbol table with a new one.

# RUN: yaml2obj %s -o %t

# RUN: llvm-objcopy -R .symtab --add-symbol newsym=1234 %t %t2
# RUN: llvm-readelf -S -s %t2 | FileCheck %s --match-full-lines

# CHECK: There are 5 section headers, starting at offset {{.+}}:
# CHECK:      [Nr] Name      Type     Address          Off    Size   ES  Flg Lk Inf Al
# CHECK-NEXT: [ 0]           NULL     0000000000000000 {{.+}} 000000 00      0  0   0
# CHECK-NEXT: [ 1] .text     PROGBITS 0000000000001000 {{.+}} 000040 00  AX  0  0   16
# CHECK-NEXT: [ 2] .strtab   STRTAB   0000000000000000 {{.+}} 000001 00      0  0   1
# CHECK-NEXT: [ 3] .shstrtab STRTAB   0000000000000000 {{.+}} 000028 00      0  0   1
# CHECK-NEXT: [ 4] .symtab   SYMTAB   0000000000000000 {{.+}} 000030 18      3  1   8

# CHECK: Symbol table '.symtab' contains 2 entries:
# CHECK-NEXT:   Num:    Value          Size Type    Bind   Vis       Ndx Name
# CHECK-NEXT:     0: 0000000000000000     0 NOTYPE  LOCAL  DEFAULT   UND
# CHECK-NEXT:     1: 00000000000004d2     0 NOTYPE  GLOBAL DEFAULT   ABS newsym

--- !ELF
FileHeader:
  Class:   ELFCLASS64
  Data:    ELFDATA2LSB
  Type:    ET_DYN
  Machine: EM_X86_64
Sections:
  - Name:            .text
    Type:            SHT_PROGBITS
    Flags:           [ SHF_ALLOC, SHF_EXECINSTR ]
    Address:         0x1000
    AddressAlign:    0x0000000000000010
    Size:            64
Symbols:
  - Name:     foo
    Type:     STT_FUNC
    Section:  .text
    Value:    0x1000
    Size:     8
  - Name:     bar
    Type:     STT_FUNC
    Section:  .text
    Value:    0x1008
    Size:     8
  - Name:     baz
    Type:     STT_FUNC
    Section:  .text
    Value:    0x1010
    Size:     8