On 2011-07-27 18:13, zenati wrote: > On 07/27/2011 02:12 PM, Jan Kiszka wrote: >> On 2011-07-27 14:01, zenati wrote: >>> On 07/27/2011 11:23 AM, Jan Kiszka wrote: >>>> On 2011-07-26 13:54, zenati wrote: >>>>> Dear, >>>>> >>>>> I'm trying to debug Xenomai kernel with GDB and Qemu. >>>> QEMU in emulation or KVM mode? >>>> >>> I'm using Qemu in emulation mode. >> What's your target arch? x84-64, x86-32, or some ARM or PPC etc. > x86-32 >>>>> So, I launch >>>>> Xenomai in Qemu and make it waiting for GDB. Then I start GDB and >>>>> connect them to Qemu, make breakpoint at the desired function to debug >>>>> and start Xenomai. If the function belongs to the linux kernel, the >>>>> execution stop at the breakpoint. But, if the function belongs to the >>>>> Xenomai nucleus, GDB recognize the breakpoint at the execution but don't >>>>> stop. >>>> Is Xenomai built as module or part of the main kernel image? The latter >>>> is simpler to handle as you don't have to deal with modules as symbol >>>> sources, find out their addresses, and load them at the right location. >>>> >>> Xenomai is built as a part of the main kernel. >> OK. Check during runtime of the guest if the disassembly at the desired >> breakpoint address matches the compiled code. Maybe there is some >> accidental discrepancy. > The breakpoints match correctly the compiled code. Anyway, it must stop > at the breakpoint. No?
...if the guest actually executes that address. I haven't used x86 QEMU in emulation mode for quite a while to debug something. Maybe we have a regression there. What's your QEMU version? Do you have a chance to test with a KVM host? It's faster anyway. Jan -- Siemens AG, Corporate Technology, CT T DE IT 1 Corporate Competence Center Embedded Linux _______________________________________________ Xenomai-core mailing list Xenomaifirstname.lastname@example.org https://mail.gna.org/listinfo/xenomai-core