llvm/test/tools/llvm-readobj/ELF/many-sections.s

   1 ## Here we simulate an object with more than ~65k sections and check how we dump it.
   2 ## When an ELF object has SHN_LORESERVE (0xff00) or more sections, its e_shnum field
   3 ## should be zero and sh_size of the section header at index 0 is used
   4 ## to store the value. If the section name string table section index is
   5 ## greater than or equal to SHN_LORESERVE, then e_shstrndx field
   6 ## should have the value of SHN_XINDEX and sh_link of the section header
   7 ## at index 0 is used to store the value.
   8
   9 # RUN: yaml2obj --docnum=1 %s -o %t1
  10 # RUN: llvm-readelf --file-headers -S %t1 | FileCheck %s --check-prefix=GNU1
  11 # GNU1: Number of section headers:         0 (3)
  12 # GNU1: Section header string table index: 65535 (2)
  13 # GNU1: There are 3 section headers, starting at offset 0x58
  14
  15 # RUN: llvm-readobj --file-headers %t1 | FileCheck %s --check-prefix=LLVM1
  16 # LLVM1: SectionHeaderCount: 0 (3)
  17 # LLVM1: StringTableSectionIndex: 65535 (2)
  18
  19 --- !ELF
  20 FileHeader:
  21   Class:     ELFCLASS64
  22   Data:      ELFDATA2LSB
  23   Type:      ET_REL
  24   EShNum:    0
  25   EShStrNdx: 0xffff ## SHN_XINDEX
  26 Sections:
  27   - Type: SHT_NULL
  28     Link: .shstrtab
  29     Size: 0x3
  30
  31 ## Another case is when e_shoff field set to zero, but not e_shstrndx.
  32 ## We want to show that this corrupt case is handled correctly.
  33
  34 # RUN: yaml2obj --docnum=2 %s -o %t2
  35
  36 # RUN: llvm-readelf --file-headers --sections %t2 2>&1 | \
  37 # RUN:   FileCheck %s -DFILE=%t2 --check-prefix=GNU2
  38 # RUN: llvm-readelf --file-headers --section-details %t2 2>&1 | \
  39 # RUN:   FileCheck %s -DFILE=%t2 --check-prefix=GNU2
  40 # GNU2: Number of section headers:         0
  41 # GNU2: Section header string table index: 65535 (corrupt: out of range)
  42
  43 # GNU2-EMPTY:
  44 # GNU2:       There are no sections in this file.
  45 # GNU2-NEXT:  warning: '[[FILE]]': e_shstrndx == SHN_XINDEX, but the section header table is empty
  46
  47 # RUN: llvm-readobj --file-headers --sections %t2 | \
  48 # RUN:   FileCheck %s --check-prefix=LLVM2 --implicit-check-not="warning:"
  49 # LLVM2:       SectionHeaderCount: 0
  50 # LLVM2:       StringTableSectionIndex: 65535 (corrupt: out of range)
  51 # LLVM2-NEXT: }
  52 # LLVM2-NEXT: Sections [
  53 # LLVM2-NEXT: ]
  54
  55 --- !ELF
  56 FileHeader:
  57   Class:     ELFCLASS64
  58   Data:      ELFDATA2LSB
  59   Type:      ET_REL
  60   EShOff:    0
  61   EShNum:    0
  62   EShStrNdx: 0xffff ## SHN_XINDEX
  63 Sections:
  64   - Type: SHT_NULL
  65     Link: .shstrtab
  66     Size: 0x3