Re: Compat 32-bit syscall entry from 64-bit task!?

[Denys Vlasenko]

On Thursday 26 January 2012 02:08, Jamie Lokier wrote:
> Indan Zupancic wrote:
> > > (2) syscall exit compat-ness is known from entry type - no need to indicate it; and
> > > (3) if we would flag syscall entry with an event value in wait status, then syscall
> > > exit will be already distinquisable.
> > 
> > False for execve which messes everything up by changing TID sometimes.
> 
> Is it disambiguated by PTRACE_EVENT_EXEC happening before the execve
> returns, and you knowing the TID always changes to the PID?  I haven't
> yet checked which TID gets the PTRACE_EVENT_EXEC event,

tid change happens before PTRACE_EVENT_EXEC event generation.

-- 
vda
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