我正在尝试在使用readelf -S libtest.soclang11 & '--target=arm-linux-androideabi21 -march=armv7-a' & cflags '-funwind-table -fno-exceptions' 编译的 32 位 libtest.so 上使用该命令。在输出中找不到“.eh_frame”或“.eh_frame_hdr”段。但是，在64位so中肯定是存在的（编译时使用'--target=aarch64-linux-android21'）。有人知道原因吗？
32bit:
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There are 29 section headers, starting at offset 0x2c3c6b8:
Section Headers:
[Nr] Name Type Addr Off Size ES Flg Lk Inf Al
[ 0] NULL 00000000 000000 000000 00 0 0 0
[ 1] .interp PROGBITS 00000174 000174 000013 00 A 0 0 1
[ 2] .note.android.ide NOTE 00000188 000188 000098 00 A 0 0 4
[ 3] .note.crashpad.in NOTE 00000220 000220 00001c 00 A 0 0 4
[ 4] .note.gnu.build-i NOTE 0000023c 00023c 000024 00 A 0 0 4
[ 5] .dynsym DYNSYM 00000260 000260 005550 10 A 10 1 4
[ 6] .gnu.version VERSYM 000057b0 0057b0 000aaa 02 A 5 0 2
[ 7] .gnu.version_r VERNEED 0000625c 00625c 000060 00 A 10 3 4
[ 8] .gnu.hash GNU_HASH 000062bc 0062bc 001a14 00 A 5 0 4
[ 9] .hash HASH 00007cd0 007cd0 002ab0 04 A 5 0 4
[10] .dynstr STRTAB 0000a780 00a780 016bf6 00 A 0 0 1
[11] .rel.dyn LOOS+0x1 00021378 021378 0297f6 01 A 5 0 4
[12] .ARM.exidx ARM_EXIDX 0004ab70 04ab70 1be028 00 AL 16 0 4
[13] .rel.plt REL 00208b98 208b98 000db0 08 A 5 23 4
[14] .rodata PROGBITS 00209a00 209a00 55b9ac 00 AMS 0 0 256
[15] .ARM.extab PROGBITS 007653ac 7653ac 005d04 00 A 0 0 4
[16] .text PROGBITS 0076b0c0 76b0c0 22e96f4 00 AX 0 0 64
[17] .plt PROGBITS 02a547c0 2a547c0 001b80 00 AX 0 0 16
[18] .fini_array FINI_ARRAY 02a57340 2a56340 000008 00 WA 0 0 4
[19] .data.rel.ro PROGBITS 02a57348 2a56348 1c300c 00 WA 0 0 8
[20] .init_array INIT_ARRAY 02c1a354 2c19354 000018 00 WA 0 0 4
[21] .dynamic DYNAMIC 02c1a36c 2c1936c 000100 08 WA 10 0 4
[22] .got PROGBITS 02c1a46c 2c1946c 000298 00 WA 0 0 4
[23] .got.plt PROGBITS 02c1a704 2c19704 0006e4 00 WA 0 0 4
[24] .bss.rel.ro NOBITS 02c1ade8 2c19de8 000000 00 WA 0 0 1
[25] .data PROGBITS 02c1bde8 2c19de8 022624 00 WA 0 0 8
[26] .bss NOBITS 02c3e410 2c3c40c 439c3c 00 WA 0 0 16
[27] .comment PROGBITS 00000000 2c3c40c 000193 01 MS 0 0 1
[28] .shstrtab STRTAB 00000000 2c3c59f 000116 00 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),
y (purecode), p (processor specific)
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64bit:
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There are 28 section headers, starting at offset 0x59b4b30:
Section Headers:
[Nr] Name Type Address Offset
Size EntSize Flags Link Info Align
[ 0] NULL 0000000000000000 00000000
0000000000000000 0000000000000000 0 0 0
[ 1] .note.android.ide NOTE 0000000000000238 00000238
0000000000000098 0000000000000000 A 0 0 4
[ 2] .note.crashpad.in NOTE 00000000000002d0 000002d0
0000000000000020 0000000000000000 A 0 0 4
[ 3] .note.gnu.build-i NOTE 00000000000002f0 000002f0
0000000000000024 0000000000000000 A 0 0 4
[ 4] .dynsym DYNSYM 0000000000000318 00000318
0000000000007cb0 0000000000000018 A 9 1 8
[ 5] .gnu.version VERSYM 0000000000007fc8 00007fc8
0000000000000a64 0000000000000002 A 4 0 2
[ 6] .gnu.version_r VERNEED 0000000000008a2c 00008a2c
0000000000000060 0000000000000000 A 9 3 4
[ 7] .gnu.hash GNU_HASH 0000000000008a90 00008a90
00000000000018e0 0000000000000000 A 4 0 8
[ 8] .hash HASH 000000000000a370 0000a370
0000000000002998 0000000000000004 A 4 0 4
[ 9] .dynstr STRTAB 000000000000cd08 0000cd08
000000000001949f 0000000000000000 A 0 0 1
[10] .rela.dyn LOOS+0x2 00000000000261a8 000261a8
0000000000137999 0000000000000001 A 4 0 8
[11] .rela.plt RELA 000000000015db48 0015db48
0000000000002af0 0000000000000018 AI 4 24 8
[12] .rodata PROGBITS 0000000000160700 00160700
00000000006e0d98 0000000000000000 AMS 0 0 256
[13] .gcc_except_table PROGBITS 0000000000841498 00841498
0000000000000f84 0000000000000000 A 0 0 4
[14] .eh_frame_hdr PROGBITS 000000000084241c 0084241c
00000000003539c4 0000000000000000 A 0 0 4
[15] .eh_frame PROGBITS 0000000000b95de0 00b95de0
0000000000d5494c 0000000000000000 A 0 0 8
[16] .text PROGBITS 00000000018ea740 018ea740
0000000003cb336c 0000000000000000 AX 0 0 64
[17] malloc_hook PROGBITS 000000000559daac 0559daac
00000000000000c8 0000000000000000 AX 0 0 2
[18] .plt PROGBITS 000000000559db80 0559db80
0000000000001cc0 0000000000000000 AX 0 0 16
[19] .data.rel.ro PROGBITS 00000000055a0840 0559f840
00000000003a4d48 0000000000000000 WA 0 0 8
[20] .fini_array FINI_ARRAY 0000000005945588 05944588
0000000000000010 0000000000000008 WA 0 0 8
[21] .init_array INIT_ARRAY 0000000005945598 05944598
0000000000000020 0000000000000000 WA 0 0 8
[22] .dynamic DYNAMIC 00000000059455b8 059445b8
0000000000000200 0000000000000010 WA 9 0 8
[23] .got PROGBITS 00000000059457b8 059447b8
000000000001c578 0000000000000000 WA 0 0 8
[24] .got.plt PROGBITS 0000000005961d30 05960d30
0000000000000e68 0000000000000000 WA 0 0 8
[25] .data PROGBITS 0000000005963b98 05961b98
0000000000052e78 0000000000000000 WA 0 0 8
[26] .bss NOBITS 00000000059b6a40 059b4a10
00000000004cbb40 0000000000000000 WA 0 0 64
[27] .shstrtab STRTAB 0000000000000000 059b4a10
000000000000011b 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)
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