Jason Wessel wrote: > Ingo Molnar wrote: >> * Jan Kiszka <[EMAIL PROTECTED]> wrote: >> >> >>> As most changes are tightly coupled, this refactoring patch for >>> KGDB_8250 as well as the core and the new KGDBOC driver comes as a >>> single chunk. The changes are: >>> - Reorganized configuration: I/O drivers can be independently >>> configured as module or built-in >>> - Dynamic reconfiguration for KGDB_8250 (just like for KGDBOC) >>> - Reworked KGDB_8250 configuration string format >>> - attachwait removed, arming the debugger via assigning an I/O driver >>> implies "attachwait" >>> - Cleaned up I/O driver managment of the core >>> - Matured the various boot-up, configure, unconfigure code paths for >>> both I/O drivers >>> - IRQ vs. KGDB_CONSOLE-output SMP race fixed for KGDB_8250 >>> - Reduced and cleaned up hooks into serial_core/8250 >>> - Kconfig cleanups >>> >> great stuff! I've picked these cleanups up into x86.git. (will pick up >> Jason's commits too) >> >> Could you try something else too perhaps, which would be way useful for >> me: to add a sysctl flag (or something like that) to change kgdboc to >> accept a Ctrl-C and break into kgdb mode? [this means a simple Ctrl-C on >> a kgdboc line would break into KGDB as well - but that would be an >> acceptable price.] Right now kgdboc just hangs when gdb attaches - i >> have to generate a SysRq sequence via a terminal emulator to break it >> into KGDB mode. >> > > FYI, even if you were to hack in a control-c vs sysrq, gdb will still
And quite a bit of "hacking" would be required here, because the sysrq hook is built upon the assumption that a hardware break starts the sequence, not that just a single special character comes in. Changing this means changing the drivers, not just some central hook function. > hang on connect because it does not issue a break of any kind when it > connects. It assumes the connection is in a usable state. > > The proxy spliter automatically sends the break (or in the current case > the sysrq g) >> This would make kgdboc way more practical without having to resort to a >> protocol splitting proxy, etc. >> >> Ingo >> > > > Jason. Jan
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