Hi Forks, I tried to use gcov tool for a coverage test of my kernel module, but it didn't work. My environment is follows... kernel : 2.6.31.12 arch : ARM Cortex-A8 board : beagleboard tool : CodeSourcery 2009q1-203 mount : file system on SD card My attempt process is follows... 1. make directory for kernel source/object on x86 build machine -> /tmp/linux 2. make directory for my kernel module on x86 build machine -> /tmp/linux/arch/arm/mach-omap2/module 3. enable DEBUG_FS and GCOV_KERNEL config 4. add "GCOV_PROFILE_mydriver.o := y" to MAKEFILE of my kernel module 5. Build kernel and kernel module on x86 build machine(I found a gcno file in the my module directory) 6. copy all files under /tmp/linux to the exact same file system location on the SD card 7. copy /tmp/linux/arch/arm/boot/uImage to the SD card 8. boot beableboard with the SD card 9. run "mount -t debugfs none /sys/kernel/debugfs" to mount debugfs 10. my module is lodable case -> When I ran "insmod mymodule.ko", I got below error. mymodule: unknown relocation: 38 insmod: can't insert 'mymodule.ko': invalid module format my module is staticary linked case -> My module was successfully loaded at bootup time, but I didn't get a gcda file Does My environment or process have problem? Is there anyone who put gcov tool to work correctly on ARM machine? Would you give me some advice? thank you, |
