Oh... The usage information was left behind :) You might need to have most recent QEMU and GDB versions for most challenging bugs :)...
1. Copy grub.gdb and gmodule.pl to your build directory. 2. Create image for QEMU (grub2.iso in my case). 3. Launch QEMU with GDB stub: qemu -s -S -cdrom grub2.iso 4. Launch GDB gdb -x grub.gdb 5. Load connect to QEMU target remote localhost:1234 6. Load debug symbols for grub 2 kernel load_kernel 7. Setup breakpoint in grub_main break grub_main 8. Continue execution until there c 9. Next time you are at grub_main 10. Delete grub_main breakpoint if it haunts you del 1 ; where 1 is being breakpoint number use 'info break' to see numbers if you lost that. 11. Setup automatic symbol loading break_load 12. Happy debugging! If you want to debug boot code that can be done also... but its a bit more tricky... and I leave that to another time :). Tips for RM code debugging: 'set arch i8086' and 'x/10i ($cs<<4)+$eip'. Thanks, Vesa Jääskeläinen _______________________________________________ Grub-devel mailing list [email protected] http://lists.gnu.org/mailman/listinfo/grub-devel
