我有一个 64 位 s390x ELF 二进制文件，其中有一个名为“.rela.plt”的 RELA 部分，其sh_link字段为 0。我的印象是这sh_link是一个必需的值，提供了重定位使用的符号的部分的 id被存储。
如果我objdump在二进制文件上运行，则不会发出有关任何重定位的信息，暗示可能没有要进行的重定位。以下由 报道readelf：
There are 36 section headers, starting at offset 0xa91c8:
Section Headers:
[Nr] Name Type Address Offset
Size EntSize Flags Link Info Align
[ 0] NULL 0000000000000000 00000000
0000000000000000 0000000000000000 0 0 0
[ 1] .note.ABI-tag NOTE 0000000080000190 00000190
0000000000000020 0000000000000000 A 0 0 4
[ 2] .note.gnu.build-i NOTE 00000000800001b0 000001b0
0000000000000024 0000000000000000 A 0 0 4
[ 3] .rela.plt RELA 00000000800001d8 000001d8
0000000000000018 0000000000000018 AI 0 23 8
[ 4] .init PROGBITS 00000000800001f0 000001f0
000000000000004c 0000000000000000 AX 0 0 4
[ 5] .plt PROGBITS 000000008000023c 0000023c
0000000000000020 0000000000000000 AX 0 0 4
[ 6] .text PROGBITS 0000000080000260 00000260
000000000006c328 0000000000000000 AX 0 0 16
[ 7] __libc_freeres_fn PROGBITS 000000008006c588 0006c588
0000000000000f18 0000000000000000 AX 0 0 8
[ 8] __libc_thread_fre PROGBITS 000000008006d4a0 0006d4a0
00000000000000f0 0000000000000000 AX 0 0 8
[ 9] .fini PROGBITS 000000008006d590 0006d590
0000000000000034 0000000000000000 AX 0 0 4
[10] .rodata PROGBITS 000000008006d5c8 0006d5c8
000000000001d810 0000000000000000 A 0 0 8
[11] __libc_subfreeres PROGBITS 000000008008add8 0008add8
0000000000000058 0000000000000000 A 0 0 8
[12] __libc_atexit PROGBITS 000000008008ae30 0008ae30
0000000000000008 0000000000000000 A 0 0 8
[13] __libc_thread_sub PROGBITS 000000008008ae38 0008ae38
0000000000000008 0000000000000000 A 0 0 8
[14] .eh_frame PROGBITS 000000008008ae40 0008ae40
000000000000aa2c 0000000000000000 A 0 0 8
[15] .gcc_except_table PROGBITS 000000008009586c 0009586c
00000000000000c5 0000000000000000 A 0 0 1
[16] .tdata PROGBITS 0000000080096ed0 00095ed0
0000000000000020 0000000000000000 WAT 0 0 8
[17] .tbss NOBITS 0000000080096ef0 00095ef0
0000000000000034 0000000000000000 WAT 0 0 8
[18] .fini_array FINI_ARRAY 0000000080096ef0 00095ef0
0000000000000008 0000000000000000 WA 0 0 8
[19] .ctors PROGBITS 0000000080096ef8 00095ef8
0000000000000010 0000000000000000 WA 0 0 8
[20] .dtors PROGBITS 0000000080096f08 00095f08
0000000000000010 0000000000000000 WA 0 0 8
[21] .jcr PROGBITS 0000000080096f18 00095f18
0000000000000008 0000000000000000 WA 0 0 8
[22] .data.rel.ro PROGBITS 0000000080096f20 00095f20
00000000000000e0 0000000000000000 WA 0 0 8
[23] .got PROGBITS 0000000080097000 00096000
00000000000000c8 0000000000000008 WA 0 0 8
[24] .data PROGBITS 00000000800970c8 000960c8
00000000000019c8 0000000000000000 WA 0 0 8
[25] .bss NOBITS 0000000080098a90 00097a90
0000000000002070 0000000000000000 WA 0 0 8
[26] __libc_freeres_pt NOBITS 000000008009ab00 00097a90
0000000000000030 0000000000000000 WA 0 0 8
[27] .comment PROGBITS 0000000000000000 00097a90
0000000000000034 0000000000000001 MS 0 0 1
[28] .debug_aranges PROGBITS 0000000000000000 00097ac4
0000000000000030 0000000000000000 0 0 1
[29] .debug_info PROGBITS 0000000000000000 00097af4
00000000000000ed 0000000000000000 0 0 1
[30] .debug_abbrev PROGBITS 0000000000000000 00097be1
000000000000007f 0000000000000000 0 0 1
[31] .debug_line PROGBITS 0000000000000000 00097c60
000000000000004c 0000000000000000 0 0 1
[32] .debug_str PROGBITS 0000000000000000 00097cac
00000000000000d3 0000000000000001 MS 0 0 1
[33] .shstrtab STRTAB 0000000000000000 000a903e
0000000000000186 0000000000000000 0 0 1
[34] .symtab SYMTAB 0000000000000000 00097d80
000000000000ae00 0000000000000018 35 759 8
[35] .strtab STRTAB 0000000000000000 000a2b80
00000000000064be 0000000000000000 0 0 1
Key to Flags:
W (write), A (alloc), X (execute), M (merge), S (strings), I (info),
L (link order), O (extra OS processing required), G (group), T (TLS),
C (compressed), x (unknown), o (OS specific), E (exclude),
p (processor specific)
此外，在 stderr 上我看到：
readelf: Warning: [ 3]: Link field (0) should index a symtab section.
我应该sh_link将“.rela.plt”部分的零解释为没有工作要做的提示吗？