Hi, I might have similar problems to what you just described. Mine's is when my kernel module causes several oops, the gdbserver will no longer break on the breakpoint in virtual machine. I have no idea why this occurs and Fabrice hasn't reply to my mail yet...
On 12/22/05, Andre Pech <[EMAIL PROTECTED]> wrote: > Hi, > > I'm running into problems using qemu to debug a kernel module. My host and > virtual machine are both x86 running Fedora Core 4. After insmoding the > module in the virtual machine, starting gdbserver, running gdb on the host > with the module sections loaded at the right place, and setting a breakpoint > in the module code, gdb does not always get notified when the code is > exectuted. After adding debugging statements to qemu, I've experienced the > following two different failure cases: > > 1) The breakpoint is set, but > translate.c:gen_intermediate_code_internal is not being > called for the breakpoint address. If I understand things correctly, this > suggests that the translation block invalidation code which is executed each > time a breakpoint is set has a problem in it. > > 2) translate.c:gen_intermetiate_code_internal is called on > the address where the breakpoint is set, and gen_debug is called. However, > gdb does not break into the code. With DEBUG_GDB set, you can see that the > gdbstub code isn't doing anything in this case, so the gdb process i am > running is never notified that the breakpoint was hit. > > Both of these cases occur frequently, but not every time. I can run gdb, > have it break correctly, kill gdb (after disabling the breakpoint and > continuing), then start gdb again and have it fail. > > I'm going to keep trying to debug this, but I was hoping that someone might > have some insight into what is going on here. I have not upgraded to qemu > 0.8.0 yet, but i couldn't find anything that suggested that this would fix > the problem. Has anyone else run into similar problems? > > Thanks > Andre Pech > > _______________________________________________ > Qemu-devel mailing list > Qemu-devel@nongnu.org > http://lists.nongnu.org/mailman/listinfo/qemu-devel > > > _______________________________________________ Qemu-devel mailing list Qemu-devel@nongnu.org http://lists.nongnu.org/mailman/listinfo/qemu-devel
