４年以上前に、こんなことやったきがするけど あかんわー、いちからや
FOMA携帯のModem Driver acm－FOMAの開発を４年位前にやってたけど、その時はこんなことも分かって、てんやろなー
と嘆いていてもしゃーないのでここで一からの覚書を
まずは、Kernelのdebugを有効へ
---------------------------- Kernel debugging -----------------------------
CONFIG_DEBUG_KERNEL:
Say Y here if you are developing drivers or trying to debug and
identify kernel problems.
Symbol: DEBUG_KERNEL [=y]
Prompt: Kernel debugging
Defined at lib/Kconfig.debug:140
Location:
-> Kernel hacking
ついでにUSBのdebugメッセージも有効へ
-------------------------- USB verbose debug messages ------------------
CONFIG_USB_DEBUG:
Say Y here if you want the USB core & hub drivers to produce a bunch
of debug messages to the system log. Select this if you are having a
problem with USB support and want to see more of what is going on.
Symbol: USB_DEBUG [=y]
Prompt: USB verbose debug messages
Defined at drivers/usb/core/Kconfig:4
Depends on: USB_SUPPORT [=y] && USB [=y]
Location:
-> Device Drivers
-> USB support (USB_SUPPORT [=y])
-> Support for Host-side USB (USB [=y])
Driverソースのdebug行を有効へ
/*
* acm-FOMA.c
*
/
// #undef DEBUG
// #undef VERBOSE_DEBUG
#define DEBUG
#define VERBOSE_DEBUG
Driverをmake
[root@p-4 linux-2.6.35.6-pepo]# make modules
CHK include/linux/version.h
CHK include/generated/utsrelease.h
CALL scripts/checksyscalls.sh
CC [M] drivers/usb/class/acm-FOMA.o
Building modules, stage 2.
MODPOST 906 modules
WARNING: modpost: Found 1 section mismatch(es).
To see full details build your kernel with:
'make CONFIG_DEBUG_SECTION_MISMATCH=y'
CC drivers/usb/class/acm-FOMA.mod.o
LD [M] drivers/usb/class/acm-FOMA.ko
[root@p-4 linux-2.6.35.6-pepo]#
デバッグコードを含んだDriverが出来る
[root@p-4 linux-2.6.35.6-pepo]# sz drivers/usb/class/acm-FOMA.ko
適当に取り出し、開発環境へ持って行く
後編に続くよ
pepoと
