[coreboot] Problems with the gdb debugger and coreboot

René Reuter reuter.rene at googlemail.com
Fri May 29 20:08:12 CEST 2009


There are no other "uses" statements in that config file. I'm using
coreboot-v2 if that helps. I'm posting the first lines of my config file:

debian:/home/sphinx/coreboot/coreboot-v2# vim
src/mainboard/emulation/qemu-x86/Config.lb

##
## Compute the location and size of where this firmware image
## (coreboot plus bootloader) will live in the boot rom chip.
##
default ROM_SIZE = 2048 * 1024
default ROM_SECTION_SIZE   = ROM_SIZE
default ROM_SECTION_OFFSET = 0

uses CONFIG_GDB_STUB
default CONFIG_GDB_STUB=1

##
## Compute the start location and size size of
## The coreboot bootloader.
##
default PAYLOAD_SIZE            = ( ROM_SECTION_SIZE - ROM_IMAGE_SIZE )
default CONFIG_ROM_PAYLOAD_START = (0xffffffff - ROM_SIZE +
ROM_SECTION_OFFSET + 1)


René


2009/5/29 Stefan Reinauer <stepan at coresystems.de>

>  You need to put the "uses" in the top half of the file (to the other uses
> statements) and the "default" into the lower half (where the other default
> statements are)
>
>
>
> On 29.05.2009 19:05 Uhr, René Reuter wrote:
>
> Here is the build fail when I put the strings into the mainboard config.lb(src/mainboard/emulation/qemu-x86)
>
> 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
> INSTANCE 0
> 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
> 0xb7b98acc>}
>
> ===> ERROR: Option uses undefined (missing use command?)
> emulation/qemu-x86/Config.lb:0
> mainboard/emulation/qemu-x86/Config.lb:0
>
>
> 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
>
> if ASSEMBLER_DEBUG
> makedefine DEBUG_CFLAGS := -g -dA -fverbose-asm
> end
>
>
> Hope that will help.
>
> Regards,
>
> René
>
>
> 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
>> >
>> > uses CONFIG_GDB_STUB
>> > 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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>
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