toybox-clone/tests/readelf.test

#!/bin/bash

[ -f testing.sh ] && . testing.sh

#testing "name" "command" "result" "infile" "stdin"

elf=$FILES/elf/ndk-elf-note

# toybox uses Linux kernel architecture names, so rewrite binutils with sed.
NOSPACE=1 testing "-h" "readelf -hW $elf-full | sed s/AArch64/arm64/g" \
"ELF Header:
  Magic:   7f 45 4c 46 02 01 01 00 00 00 00 00 00 00 00 00 
  Class:                             ELF64
  Data:                              2's complement, little endian
  Version:                           1 (current)
  OS/ABI:                            UNIX - System V
  ABI Version:                       0
  Type:                              DYN (Shared object file)
  Machine:                           arm64
  Version:                           0x1
  Entry point address:               0x660
  Start of program headers:          64 (bytes into file)
  Start of section headers:          7776 (bytes into file)
  Flags:                             0x0
  Size of this header:               64 (bytes)
  Size of program headers:           56 (bytes)
  Number of program headers:         9
  Size of section headers:           64 (bytes)
  Number of section headers:         32
  Section header string table index: 29
" "" ""

# We format the key to flags differently and don't include obsolete ones.
NOSPACE=1 testing "-S" "readelf -SW $elf-full | head -36" \
"There are 32 section headers, starting at offset 0x1e60:

Section Headers:
  [Nr] Name                 Type           Address          Off    Size   ES Flg Lk Inf Al
  [ 0]                      NULL           0000000000000000 000000 000000 00      0  0  0
  [ 1] .interp              PROGBITS       0000000000000238 000238 000015 00   A  0  0  1
  [ 2] .note.android.ident  NOTE           0000000000000250 000250 000098 00   A  0  0  4
  [ 3] .note.gnu.build-id   NOTE           00000000000002e8 0002e8 000024 00   A  0  0  4
  [ 4] .hash                HASH           0000000000000310 000310 000048 04   A  5  0  8
  [ 5] .dynsym              DYNSYM         0000000000000358 000358 000138 18   A  6  3  8
  [ 6] .dynstr              STRTAB         0000000000000490 000490 000097 00   A  0  0  1
  [ 7] .gnu.version         VERSYM         0000000000000528 000528 00001a 02   A  5  0  2
  [ 8] .gnu.version_r       VERNEED        0000000000000548 000548 000020 00   A  6  1  8
  [ 9] .rela.dyn            RELA           0000000000000568 000568 000060 18   A  5  0  8
  [10] .rela.plt            RELA           00000000000005c8 0005c8 000048 18  AI  5 19  8
  [11] .plt                 PROGBITS       0000000000000610 000610 000050 10  AX  0  0 16
  [12] .text                PROGBITS       0000000000000660 000660 00008c 00  AX  0  0  4
  [13] .eh_frame_hdr        PROGBITS       00000000000006ec 0006ec 000014 00   A  0  0  4
  [14] .eh_frame            PROGBITS       0000000000000700 000700 000030 00   A  0  0  8
  [15] .preinit_array       PREINIT_ARRAY  0000000000010d68 000d68 000010 08  WA  0  0  8
  [16] .init_array          INIT_ARRAY     0000000000010d78 000d78 000010 08  WA  0  0  8
  [17] .fini_array          FINI_ARRAY     0000000000010d88 000d88 000010 08  WA  0  0  8
  [18] .dynamic             DYNAMIC        0000000000010d98 000d98 000210 10  WA  6  0  8
  [19] .got                 PROGBITS       0000000000010fa8 000fa8 000058 08  WA  0  0  8
  [20] .bss                 NOBITS         0000000000011000 001000 000008 00  WA  0  0  8
  [21] .comment             PROGBITS       0000000000000000 001000 000107 01  MS  0  0  1
  [22] .debug_pubnames      PROGBITS       0000000000000000 001107 00001b 00      0  0  1
  [23] .debug_info          PROGBITS       0000000000000000 001122 00004b 00      0  0  1
  [24] .debug_abbrev        PROGBITS       0000000000000000 00116d 000037 00      0  0  1
  [25] .debug_line          PROGBITS       0000000000000000 0011a4 00003f 00      0  0  1
  [26] .debug_str           PROGBITS       0000000000000000 0011e3 000138 01  MS  0  0  1
  [27] .debug_macinfo       PROGBITS       0000000000000000 00131b 000001 00      0  0  1
  [28] .debug_pubtypes      PROGBITS       0000000000000000 00131c 00001a 00      0  0  1
  [29] .shstrtab            STRTAB         0000000000000000 001d0c 000151 00      0  0  1
  [30] .symtab              SYMTAB         0000000000000000 001338 0007e0 18     31 68  8
  [31] .strtab              STRTAB         0000000000000000 001b18 0001f4 00      0  0  1
" "" ""

testing "-l" "readelf -lW $elf-short" "
Elf file type is DYN (Shared object file)
Entry point 0x1001
There are 10 program headers, starting at offset 52

Program Headers:
  Type           Offset   VirtAddr   PhysAddr   FileSiz MemSiz  Flg Align
  PHDR           0x000034 0x00000034 0x00000034 0x00140 0x00140 R   0x4
  INTERP         0x000174 0x00000174 0x00000174 0x00013 0x00013 R   0x1
      [Requesting program interpreter: /system/bin/linker]
  LOAD           0x000000 0x00000000 0x00000000 0x00404 0x00404 R   0x1000
  LOAD           0x001000 0x00001000 0x00001000 0x00140 0x00140 R E 0x1000
  LOAD           0x002000 0x00002000 0x00002000 0x00144 0x00144 RW  0x1000
  DYNAMIC        0x002018 0x00002018 0x00002018 0x00100 0x00100 RW  0x4
  GNU_RELRO      0x002000 0x00002000 0x00002000 0x00144 0x01000 R   0x1
  GNU_STACK      0x000000 0x00000000 0x00000000 0x00000 0x00000 RW  0
  NOTE           0x000188 0x00000188 0x00000188 0x00038 0x00038 R   0x4
  EXIDX          0x0001c0 0x000001c0 0x000001c0 0x00030 0x00030 R   0x4

 Section to Segment mapping:
  Segment Sections...
   00     
   01     .interp 
   02     .interp .note.android.ident .note.gnu.build-id .ARM.exidx .dynsym .gnu.version .gnu.version_r .gnu.hash .dynstr .rel.dyn .relr.dyn .rel.plt 
   03     .text .plt 
   04     .preinit_array .init_array .fini_array .dynamic .got .got.plt 
   05     .dynamic 
   06     .preinit_array .init_array .fini_array .dynamic .got .got.plt 
   07     
   08     .note.android.ident .note.gnu.build-id 
   09     .ARM.exidx 
" "" ""

# binutils doesn't line up the column headers for 64-bit ELF files.
# TODO: binutils readelf lies about trailing NULL entires binutils ld produces
NOSPACE=1 toyonly testing "-d" "readelf -dW $elf-full" "
Dynamic section at offset 0xd98 contains 33 entries:
  Tag                Type                 Name/Value
 0x0000000000000001 (NEEDED)             Shared library: [libc.so]
 0x0000000000000001 (NEEDED)             Shared library: [libm.so]
 0x0000000000000001 (NEEDED)             Shared library: [libdl.so]
 0x0000000000000020 (PREINIT_ARRAY)      0x10d68
 0x0000000000000021 (PREINIT_ARRAYSZ)    0x10
 0x0000000000000019 (INIT_ARRAY)         0x10d78
 0x000000000000001b (INIT_ARRAYSZ)       16 (bytes)
 0x000000000000001a (FINI_ARRAY)         0x10d88
 0x000000000000001c (FINI_ARRAYSZ)       16 (bytes)
 0x0000000000000004 (HASH)               0x310
 0x0000000000000005 (STRTAB)             0x490
 0x0000000000000006 (SYMTAB)             0x358
 0x000000000000000a (STRSZ)              151 (bytes)
 0x000000000000000b (SYMENT)             24 (bytes)
 0x0000000000000015 (DEBUG)              0x0
 0x0000000000000003 (PLTGOT)             0x10fa8
 0x0000000000000002 (PLTRELSZ)           72 (bytes)
 0x0000000000000014 (PLTREL)             RELA
 0x0000000000000017 (JMPREL)             0x5c8
 0x0000000000000007 (RELA)               0x568
 0x0000000000000008 (RELASZ)             96 (bytes)
 0x0000000000000009 (RELAENT)            24 (bytes)
 0x000000000000001e (FLAGS)              BIND_NOW
 0x000000006ffffffb (FLAGS_1)            Flags: NOW
 0x000000006ffffffe (VERNEED)            0x548
 0x000000006fffffff (VERNEEDNUM)         1
 0x000000006ffffff0 (VERSYM)             0x528
 0x000000006ffffff9 (RELACOUNT)          4
 0x0000000000000000 (NULL)               0x0
 0x0000000000000000 (NULL)               0x0
 0x0000000000000000 (NULL)               0x0
 0x0000000000000000 (NULL)               0x0
 0x0000000000000000 (NULL)               0x0
" "" ""

# toybox does a better job of decoding Android's ELF notes than binutils.
toyonly testing "-n" "readelf -nW $elf-short" "
Displaying notes found in: .note.android.ident
  Owner                 Data size	Description
  Android              0x00000004	NT_VERSION	API level 28

Displaying notes found in: .note.gnu.build-id
  Owner                 Data size	Description
  GNU                  0x00000010	NT_GNU_BUILD_ID	da6a5f4ca8da163b9339326e626d8a3c
" "" ""

testing "-p" "readelf -p22 $elf-short" "
String dump of section '.shstrtab':
  [     1]  .preinit_array
  [    10]  .init_array
  [    1c]  .fini_array
  [    28]  .ARM.exidx
  [    33]  .text
  [    39]  .got
  [    3e]  .note.android.ident
  [    52]  .got.plt
  [    5b]  .rel.plt
  [    64]  .ARM.attributes
  [    74]  .dynstr
  [    7c]  .gnu.version_r
  [    8b]  .interp
  [    93]  .relr.dyn
  [    9d]  .rel.dyn
  [    a6]  .gnu.version
  [    b3]  .dynsym
  [    bb]  .gnu.hash
  [    c5]  .note.gnu.build-id
  [    d8]  .dynamic
  [    e1]  .shstrtab
  [    eb]  .gnu_debugdata

" "" ""

testing "-x" "readelf -x22 $elf-short" "
Hex dump of section '.shstrtab':
  0x00000000 002e7072 65696e69 745f6172 72617900 ..preinit_array.
  0x00000010 2e696e69 745f6172 72617900 2e66696e .init_array..fin
  0x00000020 695f6172 72617900 2e41524d 2e657869 i_array..ARM.exi
  0x00000030 6478002e 74657874 002e676f 74002e6e dx..text..got..n
  0x00000040 6f74652e 616e6472 6f69642e 6964656e ote.android.iden
  0x00000050 74002e67 6f742e70 6c74002e 72656c2e t..got.plt..rel.
  0x00000060 706c7400 2e41524d 2e617474 72696275 plt..ARM.attribu
  0x00000070 74657300 2e64796e 73747200 2e676e75 tes..dynstr..gnu
  0x00000080 2e766572 73696f6e 5f72002e 696e7465 .version_r..inte
  0x00000090 7270002e 72656c72 2e64796e 002e7265 rp..relr.dyn..re
  0x000000a0 6c2e6479 6e002e67 6e752e76 65727369 l.dyn..gnu.versi
  0x000000b0 6f6e002e 64796e73 796d002e 676e752e on..dynsym..gnu.
  0x000000c0 68617368 002e6e6f 74652e67 6e752e62 hash..note.gnu.b
  0x000000d0 75696c64 2d696400 2e64796e 616d6963 uild-id..dynamic
  0x000000e0 002e7368 73747274 6162002e 676e755f ..shstrtab..gnu_
  0x000000f0 64656275 67646174 61000000 000000   debugdata......

" "" ""

# TODO: remove the sed when we handle symbol versions
testing "-s" "readelf -s $elf-short | sed s/@.*//" "
Symbol table '.dynsym' contains 11 entries:
   Num:    Value  Size Type    Bind   Vis      Ndx Name
     0: 00000000     0 NOTYPE  LOCAL  DEFAULT  UND 
     1: 00000000     0 FUNC    GLOBAL DEFAULT  UND __libc_init
     2: 00000000     0 FUNC    GLOBAL DEFAULT  UND __stack_chk_fail
     3: 00000000     0 OBJECT  GLOBAL DEFAULT  UND __stack_chk_guard
     4: 00000000     0 FUNC    GLOBAL DEFAULT  UND memset
     5: 000010d8    12 FUNC    GLOBAL DEFAULT   13 __aeabi_memclr
     6: 000010d8    12 FUNC    GLOBAL DEFAULT   13 __aeabi_memclr4
     7: 000010d8    12 FUNC    GLOBAL DEFAULT   13 __aeabi_memclr8
     8: 000010c8    16 FUNC    GLOBAL DEFAULT   13 __aeabi_memset
     9: 000010c8    16 FUNC    GLOBAL DEFAULT   13 __aeabi_memset4
    10: 000010c8    16 FUNC    GLOBAL DEFAULT   13 __aeabi_memset8
" "" ""