Re: [PATCH] Move ELF program header

[Bean]

On Wed, Jun 18, 2008 at 1:18 AM, Pavel Roskin <address@hidden> wrote:
> On Wed, 2008-06-18 at 00:02 +0800, Bean wrote:
>> >> Are you using the native compiler, or cross compile from i386 ? It
>> >> could have some effect.
>> >
>> > I'm compiling natively on PowerPC.
>>
>> It could be an endian problem. Check the elf header, see if the fields are 
>> ok.
>
> That's the headers, I don't see anything wrong.  The sections are
> missing, but it has always been like that.  The version is current from
> CVS.
>
> $ ./grub-mkimage -o grub.img -d . *.mod
> $ objdump -x grub.img
>
> grub.img:     file format elf32-powerpc
> grub.img
> architecture: powerpc:common, flags 0x00000102:
> EXEC_P, D_PAGED
> start address 0x00010000
>
> Program Header:
>    LOAD off    0x000000c0 vaddr 0x00010000 paddr 0x00010000 align 2**4
>         filesz 0x0000bf04 memsz 0x000133a8 flags rwx
>    LOAD off    0x0000bfc4 vaddr 0x100000b4 paddr 0x100000b4 align 2**2
>         filesz 0x00000024 memsz 0x00000024 flags r--
>    NOTE off    0x0000bfc4 vaddr 0x100000b4 paddr 0x100000b4 align 2**2
>         filesz 0x00000024 memsz 0x00000024 flags r--
>   STACK off    0x00000000 vaddr 0x00000000 paddr 0x00000000 align 2**2
>         filesz 0x00000000 memsz 0x00000000 flags rwx
>    LOAD off    0x0000bfe8 vaddr 0x10009000 paddr 0x10009000 align 2**2
>         filesz 0x00052104 memsz 0x00052104 flags rwx
>
> Sections:
> Idx Name          Size      VMA       LMA       File off  Algn
> SYMBOL TABLE:
> no symbols
>
>
> The image loads, complains about "cursor-on", shows "Welcome to GRUB"
> and the prompt.  "lsmod" shows an empty list.

Hi,

You can also add some printf in kern/elf.c to see if grub can parse it
properly, for example, grub_elf_check_header is a common place where
problem occurs.

-- 
Bean