Where to place the text section of the kernel image

Where to place the text section of the kernel image

[Khai Trinh]

I am building the ppc kernel image for Ebony. I would
like to find out how one goes about deciding where the
place the text section of the kernel image in memory?
The output of the built had it put @0x800000. I looked
in the Makefile but couldn't find where it's
specified. More importantly, how do we decide where to
put it? The output of the makefile is shown below:

ppc_405-ld -T ../ld.script -Ttext 0x00800000 -Bstatic
-o zvmlinux head.o ../comm
on/relocate.o direct.o ../common/misc-simple.o
../common/misc-common.o ../common
/string.o ../common/util.o ../common/ns16550.o image.o
../lib/zlib.a
ppc_405-objcopy -O elf32-powerpc zvmlinux zvmlinux -R
.comment -R .stab -R .stab
str \
        -R .ramdisk -R .sysmap
cp zvmlinux ../images/zvmlinux.ebony
../utils/mktree zvmlinux ../images/zImage.ebony
0x800000

Thanks,
--Khai


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Re: Where to place the text section of the kernel image

[Matt Porter]

On Wed, May 29, 2002 at 03:31:18PM -0700, Khai Trinh wrote:
>
> I am building the ppc kernel image for Ebony. I would
> like to find out how one goes about deciding where the
> place the text section of the kernel image in memory?
> The output of the built had it put @0x800000. I looked
> in the Makefile but couldn't find where it's
> specified. More importantly, how do we decide where to
> put it? The output of the makefile is shown below:

If you put the zImage at anything less than 0x800000 then the
bootloader has to do the extra work of relocating the bootloader
and image.  The simplest approach is to simply load it at
0x800000 so it can simply uncompress the vmlinux.gz and
vector to the kernel.

Regards,
--
Matt Porter
porter@cox.net
This is Linux Country. On a quiet night, you can hear Windows reboot.

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