[Bug 1075] ARM: Programs linked to shared library segfault
bugzilla at busybox.net
bugzilla at busybox.net
Mon Mar 7 17:07:07 UTC 2011
https://bugs.busybox.net/show_bug.cgi?id=1075
--- Comment #9 from Fabrizio Gennari <fabrizio.ge at tiscali.it> ---
A little more investigation.
fge:~/crosscompiling/uClibc/lib$ arm-linux-objdump -f
libuClibc-0.9.32-rc2-git.so
libuClibc-0.9.32-rc2-git.so: file format elf32-littlearm
architecture: arm, flags 0x00000150:
HAS_SYMS, DYNAMIC, D_PAGED
start address 0x000078e0
fge at WX800170:~/crosscompiling/uClibc/lib$ arm-linux-objdump -h
libuClibc-0.9.32-rc2-git.so
libuClibc-0.9.32-rc2-git.so: file format elf32-littlearm
Sections:
Idx Name Size VMA LMA File off Algn
0 .hash 000016ec 00000114 00000114 00000114 2**2
CONTENTS, ALLOC, LOAD, READONLY, DATA
1 .dynsym 00003b00 00001800 00001800 00001800 2**2
CONTENTS, ALLOC, LOAD, READONLY, DATA
2 .dynstr 00002096 00005300 00005300 00005300 2**0
CONTENTS, ALLOC, LOAD, READONLY, DATA
3 .rel.dyn 00000300 00007398 00007398 00007398 2**2
CONTENTS, ALLOC, LOAD, READONLY, DATA
4 .rel.plt 000000e0 00007698 00007698 00007698 2**2
CONTENTS, ALLOC, LOAD, READONLY, DATA
5 .plt 00000164 00007778 00007778 00007778 2**2
CONTENTS, ALLOC, LOAD, READONLY, CODE
6 .text 000256a0 000078e0 000078e0 000078e0 2**4
CONTENTS, ALLOC, LOAD, READONLY, CODE
7 .rodata 000029fd 0002cf80 0002cf80 0002cf80 2**2
CONTENTS, ALLOC, LOAD, READONLY, DATA
8 .interp 00000030 0002f980 0002f980 0002f980 2**2
CONTENTS, ALLOC, LOAD, READONLY, DATA
9 .data.rel.ro 000000ec 00037e6c 00037e6c 0002fe6c 2**2
CONTENTS, ALLOC, LOAD, DATA
10 .dynamic 000000a8 00037f58 00037f58 0002ff58 2**2
CONTENTS, ALLOC, LOAD, DATA
11 .got 000000f4 00038000 00038000 00030000 2**2
CONTENTS, ALLOC, LOAD, DATA
12 .data 00000198 000380f4 000380f4 000300f4 2**2
CONTENTS, ALLOC, LOAD, DATA
13 .bss 00003d90 0003828c 0003828c 0003028c 2**2
ALLOC
14 .ARM.attributes 00000010 00000000 00000000 0003028c 2**0
CONTENTS, READONLY
15 .gnu.warning.gets 0000003c 00000000 00000000 0003029c 2**2
CONTENTS, READONLY
16 .gnu.warning.tmpnam 00000038 00000000 00000000 000302d8 2**2
CONTENTS, READONLY
17 .gnu.warning.gethostbyaddr_r 0000003c 00000000 00000000 00030310 2**2
CONTENTS, READONLY
18 .gnu.warning.gethostbyname_r 0000003c 00000000 00000000 0003034c 2**2
CONTENTS, READONLY
19 .gnu.warning.gethostbyaddr 0000003c 00000000 00000000 00030388 2**2
CONTENTS, READONLY
20 .gnu.warning.gethostbyname 0000003c 00000000 00000000 000303c4 2**2
CONTENTS, READONLY
21 .gnu.warning.siggetmask 0000003c 00000000 00000000 00030400 2**2
CONTENTS, READONLY
22 .comment 00000011 00000000 00000000 0003043c 2**0
CONTENTS, READONLY
Summary: the start address is just the start of .text section. This may or may
not be right, but feels wrong...
fge:~/crosscompiling/uClibc/lib$ arm-linux-objdump -T
libuClibc-0.9.32-rc2-git.so |grep 78e0
000078e0 l d .text 00000000 .text
000078e0 g DF .text 00000048 brk
It is as if the startup function is brk(). Maybe DL_START() should be called
instead?
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