On Thu, Jul 21, 2011 at 04:44:47PM +0200, Oleg Nesterov wrote: > On 07/21, Tejun Heo wrote: > > Also, I think we really should standardize what gets reported in these > > debug traps instead of letting each arch do its own thing. > > May be we can standardize .si_info within the single arch at least ;) > > I never understood what TRAP_HWBKPT/TRAP_BRKPT actually means, and > I can be easily wrong. But, afaics, on x86 PTRACE_SINGLESTEP results > in TRAP_TRACE. Unless the tracee steps over syscall, in this case > user_single_step_siginfo() sets TRAP_BRKPT. Hmm. > > And unless I misread 248bed4b0f3c s390 thinks we need TRAP_HWBKPT. Yeah, it looks like a proper mess. It seems ptrace left too much for archs to decide. Events to be reported should be defined by generic ptrace code (there can be some exceptions but only few) and archs should provide the mechanisms to implement them. I'm planning on going through ptrace arch specifics soonish. Hopefully it can be cleaned up somehow. Thanks. -- tejun -- To unsubscribe from this list: send the line "unsubscribe linux-next" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
