Nexus 6p deugging problem
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xudong...@gmail.com
Jul 10, 2018, 11:39:25 PM7/10/18
to Android Linux Kernel Development
Hi, everyone. I am trying to debug the kernel on nexus 6p so I managed to do that with this post.
And I also succeeded in patch the single step problem with this post.
But here comes the problem, when set a breakpoint, I found that I can't hit "continue". If I do that, I will get this error.
Breakpoint 1, __copy_from_user () at
arch/arm64/lib/copy_from_user.S:32
32 subs x2, x2, #8
[Switching to Thread 1104]
Breakpoint 1, __copy_from_user () at
arch/arm64/lib/copy_from_user.S:32
32 subs x2, x2, #8
[Switching to Thread 1425]
Breakpoint 1, __copy_from_user () at
arch/arm64/lib/copy_from_user.S:32
32 subs x2, x2, #8
[Switching to Thread 671]
Breakpoint 1, __copy_from_user () at
arch/arm64/lib/copy_from_user.S:32
32 subs x2, x2, #8
[Switching to Thread 965]
Breakpoint 1, __copy_from_user () at
arch/arm64/lib/copy_from_user.S:32
32 subs x2, x2, #8
[Switching to Thread 673]
Breakpoint 1, __copy_from_user () at
arch/arm64/lib/copy_from_user.S:32
32 subs x2, x2, #8
[Switching to Thread 965]
Breakpoint 1, __copy_from_user () at
arch/arm64/lib/copy_from_user.S:32
32 subs x2, x2, #8
[Switching to Thread 4769]
Breakpoint 1, __copy_from_user () at
arch/arm64/lib/copy_from_user.S:32
32 subs x2, x2, #8
Program received signal SIGTRAP, Trace/breakpoint trap.
[Switching to Thread 965]
__copy_from_user () at arch/arm64/lib/copy_from_user.S:33
33 b.mi 2f
So the problem comes when it moves on to next instruction. I don't know why. Maybe it's because the multi-core or multi-thread. Can anyone help me?
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