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    Linux加载vmlinux调试

    栏目:Linux/apache问题 时间:2019-10-07 19:02

    使用gdb加载内核符号表

    arm-eabi-gdb out/target/product/msm8625/obj/KERNEL_OBJ/vmlinux

    在内核的.config里面要打开 DEBUG_INFO和DEBUG_VM

    定位故障代码

    (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平台加载的方法,但是不管哪个平台都是差不多的,道理都是一样的。

    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调试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平台tombstone调试

    ./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  先用命令找到这个东西,然后在去找去找到vmlinux  还有就是我arm-eabi-4.7/ 这个版本才可以用,这个是我试出来的。

    总结

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