使用gdb加載內核符號表
arm-eabi-gdb out/target/product/msm8625/obj/KERNEL_OBJ/vmlinux
在內核的.config里面要打開 DEBUG_INFO和DEBUG_VM
定位故障代碼
(gdb) l * qrd7627a_add_io_devices+0x100
0xc07cd05c is in qrd7627a_add_io_devices (/home/yejialong/GH700C/kernel/arch/arm/mach-msm/msm8x25/goso-msm7627a-io.c:1851).
1846 } else if (machine_is_msm8625q_skud() || machine_is_msm8625q_evbd()) {
1847 #ifndef CONFIG_CALA02
1848 platform_device_register(&pmic_mpp_leds_pdev_skud);
1849 #endif
1850 /* enable the skud flash and torch by gpio leds driver */
1851 platform_device_register(&gpio_flash_skud);
1852 } else if (machine_is_msm8625q_skue()) {
1853 /* enable the skue flashlight by gpio leds driver */
1854 platform_device_register(&gpio_flash_skue);
1855 }
下面是mtk平臺加載的方法，但是不管哪個平臺都是差不多的，道理都是一樣的。
weiqifa@weiqifa-Inspiron-3847:~/weiqifa/tm100$ ./prebuilts/gcc/linux-x86/arm/arm-eabi-4.7/bin/arm-eabi-gdb ./out/target/product/tm100/obj/KERNEL_OBJ/vmlinux
GNU gdb (GDB) 7.3.1-gg2
Copyright (C) 2011 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "--host=x86_64-linux-gnu --target=arm-linux-android".
For bug reporting instructions, please see:
<http://source.android.com/source/report-bugs.html>...
Reading symbols from /home/weiqifa/weiqifa/tm100/out/target/product/tm100/obj/KERNEL_OBJ/vmlinux...done.
(gdb)
rockchip rk3399調試vmlinux
./prebuilts/gcc/linux-x86/aarch64/aarch64-linux-android-4.9/bin/aarch64-linux-android-addr2line -f -e kernel/vmlinux
weiqifa@dev:~/rk3399_7in1$ ./prebuilts/gcc/linux-x86/aarch64/aarch64-linux-android-4.9/bin/aarch64-linux-android-addr2line -f -e kernel/vmlinux ffffff8008459f3c
rk_iommu_domain_free
/data/weiqifa/rk3399_7in1/kernel/drivers/iommu/rockchip-iommu.c:1005 (discriminator 2)
weiqifa@dev:~/rk3399_7in1$
RK平臺tombstone調試
./prebuilts/gcc/linux-x86/arm/arm-eabi-4.8/bin/arm-eabi-addr2line -e ./out/target/product/rk3399_mid/symbols/system/lib/libspeexresampler.so 0x00002d54
/proc/self/cwd/external/speex/libspeex/resample.c:376
arm-eabi-gdb 先用命令找到這個東西，然后在去找去找到vmlinux 還有就是我arm-eabi-4.7/ 這個版本才可以用，這個是我試出來的。
總結
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