interesting line in process.c
dmj+ at andrew.cmu.edu
Sun Oct 14 03:14:02 EST 2001
On Sat, Oct 13, 2001 at 09:56:32PM +1000, Paul Mackerras wrote:
> I'm intrigued by this line, line 276 in arch/ppc/kernel/process.c in
> #if defined(CONFIG_4xx) && defined(DCRN_PLB0_BEAR) && defined(DCRN_PLB0_BEAR)
> When could we have DCRN_PLB0_BEAR defined but DCRN_PLB0_BEAR not? :)
> Could it ever be defined if CONFIG_4xx was not defined?
> Which brings up another question that I have been meaning to ask: what
> is the rationale for adding the dbcr0/1 fields to the ptrace struct
> for 4xx?
> Since struct ptrace is part of the kernel/user ABI, I prefer not to
> change it unless it is absolutely necessary. Could the dbcr0/1 fields
> go in the thread_struct instead? Where and how are they used?
Well, I don't know anything about the 4xx, so this might not be
reasonable - but could they be used in setting hardware breakpoints?
Daniel Jacobowitz Carnegie Mellon University
MontaVista Software Debian GNU/Linux Developer
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