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x86: debugctlmsr arch_has_block_step
authorRoland McGrath <roland@redhat.com>
Wed, 30 Jan 2008 12:30:54 +0000 (13:30 +0100)
committerIngo Molnar <mingo@elte.hu>
Wed, 30 Jan 2008 12:30:54 +0000 (13:30 +0100)
This implements user-mode step-until-branch on x86 using the BTF bit
in MSR_IA32_DEBUGCTLMSR.  It's just like single-step, only less so.

Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

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