PPC debug setcontext syscall implementation
trini at kernel.crashing.org
Fri Dec 3 09:23:50 EST 2004
On Thu, Dec 02, 2004 at 02:41:32PM -0600, Corey Minyard wrote:
> Hello all,
> I have attached a patch with the implementation of the debug_setcontext
> system call. The syscall has been reserved for a while and I've posted
> this before. So I've ported to the newest kernel and here it is again.
> This syscall allows signal handlers to perform debug functions. It
> allows the signal handler to turn on single-stepping, for instance, and
> the thread will get a trap after executing the next instruction. It can
> also (on supported PPC processors) turn on branch tracing and get a trap
> after the next branch instruction is executed. This is useful for
> in-application debugging.
I asked Corey off-list, and this is vs 2.6.10-rc2-mm3.
I propose (and will update the patch tracker
(http://ozlabs.org/ppc32-patches/, I don't recall if/how well it was
advertised)) that so long as KGDB still works (I'll even go test it on
classic) as well as GDB testsuite (this is a 'touchy' area, so I'd like
to well-test changes) is still 'OK', pushing this into 2.6.11.
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