From: f.fainelli@gmail.com (Florian Fainelli)
To: linux-arm-kernel@lists.infradead.org
Subject: Duplicate .plt sections warning with CONFIG_ARM_MODULE_PLTS
Date: Tue, 25 Apr 2017 16:35:37 -0700 [thread overview]
Message-ID: <1fb01fb6-3306-1d96-1da0-5b732555dfaf@gmail.com> (raw)
Hi Ard,
While using CONFIG_ARM_MODULES_PLTS=y along with a large kernel module,
I was able to have the kernel/module.c::add_sect_attrs() to complain
about duplicate .plt sections found, each section gets its own sysfs
attribute created under /sys/module/<modname>/sections/<sectname>
And indeed the module has the following section headers and contents
(see below). Is this something that looks legit or should we patch
kernel/module.c to detect such duplicates and generate unique sysfs
attribute section names instead? There does not appear to be any
functional issue with that.
Thanks!
Contents of section .plt:
0000 00 .
Contents of section .init.plt:
0001 00 .
Contents of section .plt:
0000 00
Section Headers:
[Nr] Name Type Addr Off Size ES Flg
Lk Inf Al
[ 0] NULL 00000000 000000 000000 00
0 0 0
[ 1] .text PROGBITS 00000000 000034 48d360 00 AX
0 0 4
[ 2] .rel.text REL 00000000 68d0c4 14a980 08
48 1 4
[ 3] .text.unlikely PROGBITS 00000000 48d394 001a30 00 AX
0 0 4
[ 4] .rel.text.unlikel REL 00000000 7d7a44 000700 08
48 3 4
[ 5] .rodata PROGBITS 00000000 48edc8 0b1fa4 00 A
0 0 8
[ 6] .rel.rodata REL 00000000 7d8144 025938 08
48 5 4
[ 7] .rodata.str1.1 PROGBITS 00000000 540d6c 10b88a 01 AMS
0 0 1
[ 8] .ARM.extab.text.u PROGBITS 00000000 64c5f8 000060 00 A
0 0 4
[ 9] .ARM.exidx.text.u ARM_EXIDX 00000000 64c658 000090 00 AL
3 0 4
[10] .rel.ARM.exidx.te REL 00000000 7fda7c 000148 08
48 9 4
[11] __ksymtab_strings PROGBITS 00000000 64c6e8 00da64 00 A
0 0 1
[12] .modinfo PROGBITS 00000000 65a14c 0000a0 00 A
0 0 4
[13] __param PROGBITS 00000000 65a1ec 000020 00 A
0 0 4
[14] .rel__param REL 00000000 7fdbc4 000030 08
48 13 4
[15] .alt.smp.init PROGBITS 00000000 65a20c 000028 00 A
0 0 4
[16] .rel.alt.smp.init REL 00000000 7fdbf4 000028 08
48 15 4
[17] __ex_table PROGBITS 00000000 65a238 000008 00 A
0 0 8
[18] .rel__ex_table REL 00000000 7fdc1c 000010 08
48 17 4
[19] .ARM.extab PROGBITS 00000000 65a240 002730 00 A
0 0 4
[20] .ARM.exidx ARM_EXIDX 00000000 65c970 01b658 00 AL
1 0 4
[21] .rel.ARM.exidx REL 00000000 7fdc2c 01f798 08
48 20 4
[22] __versions PROGBITS 00000000 677fc8 001840 00 A
0 0 4
[23] .note.gnu.build-i NOTE 00000000 679808 000048 00 A
0 0 4
[24] .plt PROGBITS 00000000 679850 000001 00 WA
0 0 1
[25] .init.plt PROGBITS 00000001 679851 000001 00 WA
0 0 1
[26] .plt PROGBITS 00000000 679852 000001 00 WA
0 0 1
[27] .data PROGBITS 00000000 679854 0039e8 00 WA
0 0 4
[28] .rel.data REL 00000000 81d3c4 001ca0 08
48 27 4
[29] .init.plt PROGBITS 00000000 67d23c 000001 00 WA
0 0 1
[30] .gnu.linkonce.thi PROGBITS 00000000 67d240 000168 00 WA
0 0 4
[31] .rel.gnu.linkonce REL 00000000 81f064 000010 08
48 30 4
[32] .bss NOBITS 00000000 67d3a8 04dbac 00 WA
0 0 8
[33] .comment PROGBITS 00000000 67d3a8 009106 01 MS
0 0 1
[34] .note.GNU-stack PROGBITS 00000000 6864ae 000000 00 X
0 0 1
[35] .ARM.attributes ARM_ATTRIBUTES 00000000 6864ae 000031 00
0 0 1
[36] __ksymtab PROGBITS 00000000 6864e0 0036b8 00 A
0 0 4
[37] .rel__ksymtab REL 00000000 81f074 006d70 08
48 36 4
[38] __kcrctab PROGBITS 00000000 689b98 001b5c 00 A
0 0 4
[39] .rel__kcrctab REL 00000000 825de4 0036b8 08
48 38 4
[40] .debug_info PROGBITS 00000000 68b6f4 000490 00
0 0 1
[41] .rel.debug_info REL 00000000 82949c 000408 08
48 40 4
[42] .debug_abbrev PROGBITS 00000000 68bb84 0000f8 00
0 0 1
[43] .debug_aranges PROGBITS 00000000 68bc7c 000018 00
0 0 1
[44] .rel.debug_arange REL 00000000 8298a4 000008 08
48 43 4
[45] .debug_line PROGBITS 00000000 68bc94 000190 00
0 0 1
[46] .debug_str PROGBITS 00000000 68be24 000900 01 MS
0 0 1
[47] .shstrtab STRTAB 00000000 68c724 0001cd 00
0 0 1
[48] .symtab SYMTAB 00000000 8298ac 0ffc50 10
49 49732 4
[49] .strtab STRTAB 00000000 9294fc 0f5791 00
0 0 1
--
Florian
next reply other threads:[~2017-04-25 23:35 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-25 23:35 Florian Fainelli [this message]
2017-04-26 7:33 ` Duplicate .plt sections warning with CONFIG_ARM_MODULE_PLTS Ard Biesheuvel
2017-04-26 23:28 ` Florian Fainelli
2017-04-27 9:20 ` Ard Biesheuvel
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