patchelf
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Published
20 hours ago •
NixOS
NixOS
patchelf produces a corrupted file: no .dynamic section in the dynamic segment
If I try to run patchelf on the libm.so which is shipped with centos6, I get a corrupted file: (for convenience, you can find the file also here: http://antocuni.eu/misc/libm-2.12.so)
$ ~/tmp/patchelf/src/patchelf --set-soname xxx libm-2.12.so
$ readelf -d libm-2.12.so
readelf: Error: no .dynamic section in the dynamic segment
...
Moreover, the sections also appear to be corrupted: note the names of some of the sections (like e.ABI-tag instead of note.ABI-tag, la.dyn instead of rela.dyn, etc):
$ readelf -S libm-2.12.so
There are 37 section headers, starting at offset 0x91240:
Section Headers:
[Nr] Name Type Address Offset
Size EntSize Flags Link Info Align
[ 0] NULL 0000000000000000 00000000
0000000000000000 0000000000000000 0 0 0
[ 1] sion_r GNU_HASH 0000000000000280 00000280
0000000000000fa4 0000000000000000 A 2 0 8
[ 2] t DYNSYM 0000000000001228 00001228
0000000000001f08 0000000000000018 A 34 2 8
[ 3] .fini VERSYM 00000000000038b2 000038b2
0000000000000296 0000000000000002 A 2 0 2
[ 4] e.ABI-tag VERDEF 0000000000003b48 00003b48
000000000000005c 0000000000000000 A 34 3 8
[ 5] e_hdr VERNEED 0000000000003ba8 00003ba8
0000000000000030 0000000000000000 A 34 1 8
[ 6] RELA 0000000000003bd8 00003bd8
00000000000000a8 0000000000000018 A 2 0 8
[ 7] RELA 0000000000003c80 00003c80
0000000000000108 0000000000000018 A 2 9 8
[ 8] a PROGBITS 0000000000003d88 00003d88
0000000000000018 0000000000000000 AX 0 0 4
[ 9] e.stapsdt PROGBITS 0000000000003da0 00003da0
00000000000000c0 0000000000000010 AX 0 0 4
[10] anges PROGBITS 0000000000003e60 00003e60
0000000000040578 0000000000000000 AX 0 0 16
[11] la.dyn PROGBITS 00000000000443d8 000443d8
000000000000000e 0000000000000000 AX 0 0 4
[12] b PROGBITS 0000000000044400 00044400
00000000000384e8 0000000000000000 A 0 0 32
[13] sion PROGBITS 000000000007c8e8 0007c8e8
0000000000000001 0000000000000000 A 0 0 1
[14] .eh_frame_hdr PROGBITS 000000000007c8f0 0007c8f0
000000000000001c 0000000000000000 A 0 0 16
[15] rs PROGBITS 000000000007c90c 0007c90c
0000000000000e74 0000000000000000 A 0 0 4
[16] r PROGBITS 000000000007d780 0007d780
00000000000044e4 0000000000000000 A 0 0 8
[17] _r HASH 0000000000081c68 00081c68
0000000000000ea8 0000000000000004 A 2 0 8
[18] el.ro PROGBITS 0000000000282dc8 00082dc8
0000000000000010 0000000000000000 WA 0 0 8
[19] dynamic PROGBITS 0000000000282dd8 00082dd8
0000000000000010 0000000000000000 WA 0 0 8
[20] PROGBITS 0000000000282de8 00082de8
0000000000000008 0000000000000000 WA 0 0 8
[21] base PROGBITS 0000000000282df0 00082df0
0000000000000008 0000000000000000 WA 0 0 8
[22] d-id DYNAMIC 0000000000282df8 00082df8
00000000000001c0 0000000000000010 WA 34 0 8
[23] ug_aranges PROGBITS 0000000000282fb8 00082fb8
0000000000000030 0000000000000008 WA 0 0 8
[24] psdt PROGBITS 0000000000282fe8 00082fe8
0000000000000070 0000000000000008 WA 0 0 8
[25] .symtab PROGBITS 0000000000283058 00083058
0000000000000014 0000000000000000 WA 0 0 4
[26] NOBITS 0000000000283070 0008306c
0000000000000048 0000000000000000 WA 0 0 16
[27] NOTE 0000000000000000 0008306c
0000000000000150 0000000000000000 0 0 4
[28] ment PROGBITS 0000000000000000 000831bc
000000000000002d 0000000000000001 MS 0 0 1
[29] e.gnu.build-id STRTAB 0000000000000000 000831e9
00000000000001ba 0000000000000000 0 0 1
[30] b SYMTAB 0000000000000000 000833a8
000000000000a590 0000000000000018 31 1437 8
[31] tab STRTAB 0000000000000000 0008d938
00000000000037a2 0000000000000000 0 0 1
[32] PROGBITS 0000000000000000 000910dc
0000000000000018 0000000000000000 0 0 4
[33] e.gnu.build-id STRTAB 0000000000000000 000910f4
0000000000000145 0000000000000000 0 0 1
[34] STRTAB 0000000000092000 00092000
0000000000000786 0000000000000000 A 0 0 8
[35] ion_d NOTE 0000000000092788 00092788
0000000000000020 0000000000000000 A 0 0 8
[36] hash NOTE 00000000000927a8 000927a8
0000000000000024 0000000000000000 A 0 0 8
For context, I got this problem when I tried to build a python wheel on a centos 6 docker image.
I ran into a similar issue today but with libnsl.so - first reported this in the context of linuxdeployqt, see this issue. Happens on both Fedora 25 and CentOS 7.3.
Not sure if it can help you but the following snippet could resolve your issue:
import lief
libm = lief.parse("libm-2.12.so")
libm[lief.ELF.DYNAMIC_TAGS.SONAME].name = "xxx"
libm.write("libm_updated.so")
readelf -d ./libm_updated.so
Dynamic section at offset 0x83df8 contains 24 entries:
Étiquettes Type Nom/Valeur
0x0000000000000001 (NEEDED) Bibliothèque partagée: [libc.so.6]
0x000000000000000e (SONAME) Bibliothèque soname: [xxx]
0x000000000000000c (INIT) 0x4d88
0x000000000000000d (FINI) 0x453d8
0x0000000000000004 (HASH) 0x82c68
0x000000006ffffef5 (GNU_HASH) 0x1280
0x0000000000000005 (STRTAB) 0x493000
0x0000000000000006 (SYMTAB) 0x2228
0x000000000000000a (STRSZ) 1911 (octets)
0x000000000000000b (SYMENT) 24 (octets)
0x0000000000000003 (PLTGOT) 0x283fe8
0x0000000000000002 (PLTRELSZ) 264 (octets)
0x0000000000000014 (PLTREL) RELA
0x0000000000000017 (JMPREL) 0x4c80
0x0000000000000007 (RELA) 0x4bd8
0x0000000000000008 (RELASZ) 168 (octets)
0x0000000000000009 (RELAENT) 24 (octets)
0x000000006ffffffc (VERDEF) 0x4b48
0x000000006ffffffd (VERDEFNUM) 3
0x000000006ffffffe (VERNEED) 0x4ba8
0x000000006fffffff (VERNEEDNUM) 1
0x000000006ffffff0 (VERSYM) 0x48b2
0x000000006ffffff9 (RELACOUNT) 1
0x0000000000000000 (NULL) 0x0
Sorry for the Shameless plug of LIEF
Link to file seems dead, so here's a cpy of file in question I grabbed from a centos-6 docker image: http://ix.io/DFU
Can reproduce (with patchelf 0.9), FWIW.
