On Mon, Feb 05, 2018 at 07:10:58PM +0800, Liu, Jing2 wrote:
On 1/31/2018 10:46 AM, Kevin O'Connor wrote:
On Mon, Jan 29, 2018 at 02:18:45PM +0800, Liu,
I am using Seabios for qemu startup, and interested in the debugging by GDB
to see how the bios works.
Currently, I do it as https://www.seabios.org/Debugging
said but met some
problems so that couldn't move on. :(
Could someone give some pointers on what I missed or have to do to enable
the gdb debugging?
Arch: x86_64 PC
CONFIG_DEBUG_SERIAL is enabled.
CONFIG_RELOCATE_INIT is disabled.
1. After Qemu starts, I run "gdb out/rom32seg.o" in another session, and do
"target remote localhost:1234", it warns me that
"Selected architecture i386 is not compatible with reported target
architecture i386:x86_64". But I didn't find any 64bit rom.
I'm not sure why you choose out/rom32seg.o - to debug the 32bit code,
you want to use out/rom.o.
Thank you for your answer!
But after I connect to qemu in the gdb session, and execute "run" OR
to start the rom.o, it both reports me a signal SIGKILL.
It works for me. See log below.
$ ../qemu/qemu-2.10.0/i386-softmmu/qemu-system-i386 -k en-us -snapshot -L test -chardev
stdio,id=seabios -device isa-debugcon,iobase=0x402,chardev=seabios -m 512 -hda dos-drivec
$ gdb out/rom.o
GNU gdb (GDB) Fedora 8.0.1-35.fc27
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and "show warranty" for details.
This GDB was configured as "x86_64-redhat-linux-gnu".
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Reading symbols from out/rom.o...done.
(gdb) target remote localhost:1234
Remote debugging using localhost:1234
0x0000fff0 in ?? ()
(gdb) b startBoot
Breakpoint 1 at 0xf1d4d: file ./src/post.c, line 184.
Breakpoint 1, startBoot () at ./src/post.c:184