Messages in this thread | | | Date | Tue, 07 Aug 2012 12:52:56 +0200 | From | Sebastian Andrzej Siewior <> | Subject | Re: [PATCH 2/2] ptrace: fix set_task_blockstep()->update_debugctlmsr() logic |
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On 08/07/2012 11:41 AM, Sebastian Andrzej Siewior wrote: > On 08/03/2012 06:29 PM, Oleg Nesterov wrote: > For uprobes we never set the bit, we only need it cleared. We get here > via int 3 and do_debug() already clears TIF_BLOCKSTEP because the > CPU clears the bit in CPU. So both, TIF_BLOCKSTEP and DEBUGCTLMSR_BTF > are never set.
Actually I'm, wrong. Syscalls do clear the DEBUGCTLMSR_BTF bit, int3 does not. So yes, we need it after all…
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