[U-Boot-Users] MIPS (purple) compilation problems.

[Ronen Shitrit]

Hi

I'm trying to port the U-Boot to Marvell board with MIPS (rm7000)
I see that after relocating to the DRAM the disassembly of the u-boot 
shows me
that we jump back to the flash:
start.S:                                            dis:
la     t9,board_init_r                    lui     t9,0xbfc1
                                                  addiu     t9,20140
j      t9                                        jr     t9

I see that I get the same problem when I jump to printf etc.
maybe it is because I don't compile the code as PIC? Is there any 
special compilation flag I should use?
Can someone please send me a disassembly of the U-Boot for any of the 
MIPS board (purple, incaip or dbaux100).

Is there any special handle for relocating of the MIPS that is different 
from the PPC, that I should take under consideration???

Thanks Ronen

Ronen Shitrit wrote:

> Hi
>
> I'm trying to port the U-Boot to Marvell board with MIPS (rm7000)
> I am using a cross compiler mips64-elf.
> I'm trying to compile the purpule_config and I have some compilation 
> problems,
> when I'm using the cpu/mips/config  flag -mabicalls I get a lot of 
> warnings:
>      c1: warning: -G is incompatible with PIC code which is the default
>       .........
> and an LD error:
>      mips64-elf-ld: common/main.o: linking PIC files with non-PIC files
>      Bad value: failed to merge target specific data of file 
> common/main.o
>
> When I remove the -mabicalls flag, the compilation pass, and the LD 
> fail again on different error:
>        mips64-elf-ld: target elf32-tradbigmips not found
>
> The LD is looking for elf32-tradbigmips because in the LD script we 
> define the output file to be: elf32-tradbigmips
>
> why do we use this definition and not elf32-bigmips??  and what is the 
> difference between these two??
> and why when I install my cross compiler I don't have support for this 
> output format??
>
> so I changed it the output format to elf32-bigmips then I'm getting 
> this LD error:
>            : undefined reference to `_GLOBAL_OFFSET_TABLE_'
>
> I know it is because I don't have this define in the linker script, 
> and I guess the elf32-tradbigmips has this definition.
> What should I do??
>
> Thanks
>

-- 
Ronen Shitrit

M.S.I.L
D.N. Misgav  20184
Tel:   +972-4-9951000
Fax:   +972-4-9951001
Email: mailto: ronen.shitrit at il.marvell.com
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