Subject: -current libc not working
To: None <port-alpha@netbsd.org, current-users@netbsd.org>
From: Peter Seebach <seebs@plethora.net>
List: current-users
Date: 05/30/2000 22:02:57
Okay, I'm sure this is me. But I'm not sure what I'm doing.
I'm running -current on a couple of boxes. Among them, i386 and alpha.
My i386 is working beautifully.
My alpha experiences a tragic death of all dynamically linked executables
if I use libc.so.12.61. It works fine with my fairly old libc.so.12.54.
The problem is a symbol called __mainprog_obj. The symbol is defined in
crt0.o. It is defined in all the dynamically linked executables. However,
when they try to link to libc (which needs an external symbol named
__mainprog_obj), they fail, and I get:
/usr/lib/libc.so.12: Undefined symbol "__mainprog_obj" (reloc type = 25, symnum = 1024)
Here's the nm output of a sample program ("main(){}"):
0000000120100c90 A _DYNAMIC
0000000120100be8 A _GLOBAL_OFFSET_TABLE_
0000000120100ba0 A _PROCEDURE_LINKAGE_TABLE_
0000000120100da0 A __bss_start
0000000120100da0 B __mainprog_obj
0000000120100b58 D __progname
0000000120100b60 D __ps_strings
00000001200005a0 T __start
U __syscall
0000000120000900 T _dladdr
0000000120000840 T _dlclose
00000001200008c0 T _dlerror
0000000120000800 T _dlopen
0000000120000880 T _dlsym
0000000120100da0 A _edata
0000000120100db0 A _end
0000000120000aa0 A _etext
0000000120000aa0 ? _fini
0000000120000540 ? _init
0000000120000700 T _rtld_setup
U atexit
0000000120000900 W dladdr
0000000120000840 W dlclose
00000001200008c0 W dlerror
0000000120000800 W dlopen
0000000120000880 W dlsym
0000000120100da8 B environ
U exit
0000000120000a60 T main
Now, __mainprog_obj looks fine to me. It looks pretty much the same as it
does in a similar binary on i386, except that the address is larger. :)
I've rebuilt:
* gcc, gas, ld
* crt0.o
* my test program
* libc
and this still happens.
Anyone else got this?
I'd be particularly interested in a binary from a system using a recent libc,
so I can see if it links okay. I figure, either the programs are wrong, or
libc is wrong.
BTW, crt0.o's nm output:
U _DYNAMIC
0000000000000008 C __mainprog_obj
0000000000000000 D __progname
0000000000000008 D __ps_strings
0000000000000000 T __start
U __syscall
0000000000000360 T _dladdr
00000000000002a0 T _dlclose
0000000000000320 T _dlerror
0000000000000260 T _dlopen
00000000000002e0 T _dlsym
U _fini
U _init
0000000000000160 T _rtld_setup
U atexit
0000000000000360 W dladdr
00000000000002a0 W dlclose
0000000000000320 W dlerror
0000000000000260 W dlopen
00000000000002e0 W dlsym
0000000000000008 C environ
U exit
U main
Looks boring enough to me.
-s