1. Get target load address
cat /proc/*/maps | grep gralloc_viv.imx6.so
ad920000-ad924000 r-xp 00000000 103:02 722 /system/lib/hw/gralloc_viv.imx6.so
2. Get lib .text address
/mnt/projects/lollipop_mnt/myandroid/prebuilts/gcc/linux-x86/arm/arm-eabi-4.6/bin/arm-eabi-readelf -S /mnt/projects/lollipop_mnt/out/matrix_io/android/target/product/matrix_io/system/lib/hw/gralloc_viv.imx6.so
Section Headers:
[Nr] Name Type Addr Off Size ES Flg Lk Inf Al
[ 8] .text PROGBITS 000013d8 0013d8 001988 00 AX 0 0 8
0xad920000 + 0x000013d8 = 0xad921d38
3. Set to arm-eabi-gdb
click Startup tab
uncheck the all items on startup page
add those lines under [Halt] box but do not check [Halt]
add-symbol-file /mnt/projects/lollipop_mnt/out/matrix_io/android/target/product/matrix_io/system/lib/hw/gralloc_viv.imx6.so 0xad9213d8
apply to debug
4. Set breakpoint in a function
/mnt/projects/lollipop_mnt/myandroid/prebuilts/gcc/linux-x86/arm/arm-eabi-4.6/bin/arm-eabi-readelf -s /mnt/projects/lollipop_mnt/out/matrix_io/android/target/product/matrix_io/system/lib/hw/gralloc_viv.imx6.so
28: 00001af1 456 FUNC GLOBAL DEFAULT 8 _Z25gralloc_alloc_framebu
gralloc_alloc_frame = 0x00001af1 - 0x1 = 0x00001af0 (aligned 4 address in arm cortex)
set break point at target
0xad920000 + 0x00001af0 = 0xad921af0
Demo
Picasa Web Albums - Jesse Stone - i.mx6
Ref.
Programming Guide: OpenOCD with Eclipse debug u-boot & kernel on i.mx6
