x86, ptrace: Fix block-step

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Implement ptrace-block-step using TIF_BLOCKSTEP which will set
DEBUGCTLMSR_BTF when set for a task while preserving any other
DEBUGCTLMSR bits.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <20100325135414.017536066@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

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Peter Zijlstra 2010-03-25 14:51:51 +01:00 • committed by Ingo Molnar

parent faa4602e47

commit ea8e61b7bb

6 changed files with 53 additions and 9 deletions

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4

arch/x86/include/asm/processor.h

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4

arch/x86/include/asm/thread_info.h

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14

arch/x86/kernel/kprobes.c

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11

arch/x86/kernel/process.c

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24

arch/x86/kernel/step.c

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5

arch/x86/kernel/traps.c

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