2.6.0-t1: problems with modules

From: Martin Zwickel (martin.zwickel@technotrend.de)
Date: Tue Jul 15 2003 - 04:36:10 EST

Hi there!

I try to compile my driver for 2.6.0-t1.

I can insmod 2 modules out of 3, and i dont know why the 3rd fails.

Changes I did for 2.6.0-t1 to my driver:
 - added -DKBUILD_MODNAME=<name>
 - renamed MINOR() to minor()
 - removed MOD_INC/DEC_USE_COUNT
 - removed MODULE_PARM*

---------------------------------
A module thats working:
gcc:
gcc -Wall -O3 -finline-functions -Wstrict-prototypes -falign-functions=4
-I/lib/modules/2.6.0-test1-ac1/build/include
-I/lib/modules/2.6.0-test1-ac1/build/include/asm/mach-default -I./include
-D__KERNEL__ -DMODULE -DEXPORT_SYMTAB -DKBUILD_MODNAME=working -c working.c -o
working.o

insmod:
# insmod ./working.o

kmsg:
Jul 15 11:26:28 phoebee working: no version magic, tainting kernel.
Jul 15 11:26:28 phoebee working: module license 'TechnoTrend' taints kernel.

objdump -h:
# objdump -h working.o
working.o: file format elf32-i386
Sections:
Idx Name Size VMA LMA File off Algn
  0 .text 00000166 00000000 00000000 00000040 2**4
                  CONTENTS, ALLOC, LOAD, RELOC, READONLY, CODE
  1 .data 00000078 00000000 00000000 000001c0 2**5
                  CONTENTS, ALLOC, LOAD, RELOC, DATA
  2 .bss 00000018 00000000 00000000 00000238 2**2
                  ALLOC
  3 .gnu.linkonce.this_module 00000200 00000000 00000000 00000280 2**7
                  CONTENTS, ALLOC, LOAD, RELOC, DATA, LINK_ONCE_DISCARD
  4 .modinfo 0000004a 00000000 00000000 00000480 2**5
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
  5 .rodata.str1.1 0000004c 00000000 00000000 000004ca 2**0
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
  6 .rodata.str1.32 00000025 00000000 00000000 00000520 2**5
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
  7 .init.text 000000d8 00000000 00000000 00000550 2**4
                  CONTENTS, ALLOC, LOAD, RELOC, READONLY, CODE
  8 .exit.text 0000006a 00000000 00000000 00000630 2**4
                  CONTENTS, ALLOC, LOAD, RELOC, READONLY, CODE
  9 .comment 00000042 00000000 00000000 0000069a 2**0
                  CONTENTS, READONLY
--------------------------------
The module thats not working:
gcc:
gcc -Wall -O3 -finline-functions -Wstrict-prototypes -falign-functions=4
-I/lib/modules/2.6.0-test1-ac1/build/include
-I/lib/modules/2.6.0-test1-ac1/build/include/asm/mach-default -I./include
-D__KERNEL__ -DMODULE -DEXPORT_SYMTAB -DKBUILD_MODNAME=not_working -c
not_working.c -o not_working.o

insmod:
# insmod ./not_working.o
Error inserting './not_working.o': -1 Invalid module format

kmsg:
Jul 15 11:27:55 phoebee not_working: no version magic, tainting kernel.
Jul 15 11:27:55 phoebee not_working: module license 'TechnoTrend' taints kernel.

objdump -h:
# objdump -h not_working.o
not_working.o: file format elf32-i386
Sections:
Idx Name Size VMA LMA File off Algn
  0 .text 00000bb3 00000000 00000000 00000040 2**4
                  CONTENTS, ALLOC, LOAD, RELOC, READONLY, CODE
  1 .data 00000080 00000000 00000000 00000c00 2**5
                  CONTENTS, ALLOC, LOAD, RELOC, DATA
  2 .bss 00000004 00000000 00000000 00000c80 2**2
                  ALLOC
  3 .gnu.linkonce.this_module 00000200 00000000 00000000 00000c80 2**7
                  CONTENTS, ALLOC, LOAD, RELOC, DATA, LINK_ONCE_DISCARD
  4 .modinfo 0000004a 00000000 00000000 00000e80 2**5
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
  5 .rodata.str1.32 00000378 00000000 00000000 00000ee0 2**5
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
  6 .rodata.str1.1 0000000c 00000000 00000000 00001258 2**0
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
  7 .rodata 0000004c 00000000 00000000 00001264 2**2
                  CONTENTS, ALLOC, LOAD, RELOC, READONLY, DATA
  8 .fixup 00000068 00000000 00000000 000012b0 2**0
                  CONTENTS, ALLOC, LOAD, RELOC, READONLY, CODE
  9 __ex_table 00000040 00000000 00000000 00001318 2**2
                  CONTENTS, ALLOC, LOAD, RELOC, READONLY, DATA
 10 .init.text 000000cc 00000000 00000000 00001360 2**4
                  CONTENTS, ALLOC, LOAD, RELOC, READONLY, CODE
 11 .exit.text 00000050 00000000 00000000 00001430 2**4
                  CONTENTS, ALLOC, LOAD, RELOC, READONLY, CODE
 12 .comment 00000042 00000000 00000000 00001480 2**0
                  CONTENTS, READONLY
--------------------------------

What is wrong with the not_working.o?
And do I have to use try_module_get(mod) & module_put(mod) since
MOD_INC/DEC_USE_COUNT are deprecated?
What about the MODULE_PARM? any replacement?

Sorry if I'm asking already answered questions.

Regards,
Martin 

-- 
MyExcuse:
backup tape overwritten with copy of system manager's favourite CD

Martin Zwickel <martin.zwickel@technotrend.de>
Research & Development

TechnoTrend AG <http://www.technotrend.de>
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This archive was generated by hypermail 2b29 : Tue Jul 15 2003 - 22:00:56 EST