[coreboot] Problems with the gdb debugger and coreboot

René Reuter reuter.rene at googlemail.com
Fri May 29 19:05:28 CEST 2009

Here is the build fail when I put the strings into the mainboard

Configuring DIR /boot/Config.lb
add object src/boot/elfboot.o source $(TOP)//src/boot/elfboot.c
add object src/boot/hardwaremain.o source $(TOP)//src/boot/hardwaremain.c
partobj dir
/home/sphinx/coreboot/coreboot-v2/src/mainboard/emulation/qemu-x86 parent 0
part mainboard
curpart.uses_options is {'ROM_IMAGE_SIZE': <__main__.option instance at
0xb787ec6c>, 'CROSS_COMPILE': <__main__.option instance at 0xb7850fcc>,
'MAINBOARD': <__main__.option instance at 0xb7ba528c>, '_ROMBASE':
<__main__.option instance at 0xb788244c>, 'ROM_SECTION_SIZE':
<__main__.option instance at 0xb787ee6c>, 'ROM_SIZE': <__main__.option
instance at 0xb787ea8c>, 'USE_OPTION_TABLE': <__main__.option instance at
0xb7b98c2c>, 'CONFIG_PCI_OPTION_ROM_RUN_VM86': <__main__.option instance at
0xb7bcc64c>, 'HAVE_MP_TABLE': <__main__.option instance at 0xb7baa62c>,
'HAVE_HARD_RESET': <__main__.option instance at 0xb7bb9aac>, 'ARCH':
<__main__.option instance at 0xb7850c4c>, 'CONFIG_CONSOLE_SERIAL8250':
<__main__.option instance at 0xb7b9ef6c>, 'ROM_SECTION_OFFSET':
<__main__.option instance at 0xb788206c>, 'XIP_ROM_BASE': <__main__.option
instance at 0xb7b981cc>, 'MAINBOARD_PART_NUMBER': <__main__.option instance
at 0xb7ba53ec>, 'FALLBACK_SIZE': <__main__.option instance at 0xb787e68c>,
'MAINBOARD_VENDOR': <__main__.option instance at 0xb7ba55cc>,
'CONFIG_PCI_ROM_RUN': <__main__.option instance at 0xb7bcc04c>,
'CONFIG_PRECOMPRESSED_PAYLOAD': <__main__.option instance at 0xb7bae5ec>,
'PAYLOAD_SIZE': <__main__.option instance at 0xb788224c>, 'CONFIG_COMPRESS':
<__main__.option instance at 0xb7b9858c>, 'USE_FALLBACK_IMAGE':
<__main__.option instance at 0xb787e2cc>, 'HOSTCC': <__main__.option
instance at 0xb78762ec>, 'CC': <__main__.option instance at 0xb787616c>,
'MAXIMUM_CONSOLE_LOGLEVEL': <__main__.option instance at 0xb7ba13ac>,
'XIP_ROM_SIZE': <__main__.option instance at 0xb7b983ac>, 'HAVE_PIRQ_TABLE':
<__main__.option instance at 0xb7bb2b2c>, 'HEAP_SIZE': <__main__.option
instance at 0xb7882e2c>, 'HAVE_FALLBACK_BOOT': <__main__.option instance at
0xb787beec>, 'IRQ_SLOT_COUNT': <__main__.option instance at 0xb7bb2dec>,
'STACK_SIZE': <__main__.option instance at 0xb7882bec>,
'CONFIG_ROM_PAYLOAD_START': <__main__.option instance at 0xb7bae14c>,
'DEFAULT_CONSOLE_LOGLEVEL': <__main__.option instance at 0xb7ba124c>,
'USE_DCACHE_RAM': <__main__.option instance at 0xb7b9346c>,
'COREBOOT_EXTRA_VERSION': <__main__.option instance at 0xb78769ac>,
'CONFIG_COMPRESSED_PAYLOAD_LZMA': <__main__.option instance at 0xb7bae48c>,
'CONFIG_CBFS': <__main__.option instance at 0xb7baee2c>,
'CONFIG_COMPRESSED_PAYLOAD_NRV2B': <__main__.option instance at 0xb7bae32c>,
'_RAMBASE': <__main__.option instance at 0xb7b930ac>, 'CONFIG_ROM_PAYLOAD':
<__main__.option instance at 0xb7baafcc>, 'OBJCOPY': <__main__.option
instance at 0xb787662c>, 'HAVE_OPTION_TABLE': <__main__.option instance at

===> ERROR: Option uses undefined (missing use command?)

And here are the CFLAGS in src/config/Config.lb

makedefine CPPFLAGS := -I$(TOP)/src/include
-I$(TOP)/src/arch/$(ARCH)/include -I$(GCC_INC_DIR) $(CPUFLAGS)
makedefine CFLAGS := $(CPU_OPT) $(DISTRO_CFLAGS) $(CPPFLAGS) -Os -g
-nostdinc -nostdlib -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs
-Werror-implicit-function-declaration -Wstrict-aliasing -Wshadow -fno-common
-ffreestanding -fno-builtin -fomit-frame-pointer

makedefine DEBUG_CFLAGS := -g -dA -fverbose-asm

Hope that will help.



2009/5/29 Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006 at gmx.net>

> Hi René,
> On 28.05.2009 16:28, René Reuter wrote:
> > I'm trying to set up the gdb debugger with coreboot and qemu. I've
> followed
> > the instructions on that page: http://www.coreboot.org/Debugging
> >
> > If I put
> >
> > default CONFIG_GDB_STUB=1
> >
> > into the mainboards config.lb how it's written in the instructions the
> > ./buildtarget will fail.
> How does it fail? Please paste the last few lines of the log so we can
> investigate.
> > That's why I put it into src/config/Config.lb, then
> > the build is successful but gdb can't find any debugging symbols in the
> > coreboot.ram.
> >
> > The CFLAGS are all set correct.
> >
> > Does anybody know an idea what I'm doing wrong?
> >
> With more info, we can probably figure it out.
> Regards,
> Carl-Daniel
> --
> http://www.hailfinger.org/
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