Compiling assembler file with ppc_405-gcc

[Kerl, John]

Unsupported relocation against r6 means, the assembler expects
a bare "6" & needs the #define r6 6.  This is in ppc_asm.tmpl,
included by ppc_asm.h, which you have.

The file extension should be .S, not .s.

Here is what I use:

*	.S file has #include "ppc_asm.h"
*	Assemble command is
	ppc_8xx-gcc -c -D__ASSEMBLY__ -I/path/to/arch/ppc/kernel whatever.S


> -----Original Message-----
> From: owner-linuxppc-embedded at lists.linuxppc.org
> [mailto:owner-linuxppc-embedded at lists.linuxppc.org]On Behalf Of Garcia
> Jérémie
> Sent: Friday, June 11, 2004 9:28 AM
> To: linuxppc-embedded at lists.linuxppc.org
> Subject: Compiling assembler file with ppc_405-gcc
>
>
>
> Hi everybody,
> although I'm a newbie in Linux developement and even more in
> LinuxPPC development, I have to work on a Linux PPC assembler
> based application.
> In order to achieve this, I need to compile an assembler file
> (ppcsiafn.s) which now gives nightmares ...
> Below this line you can dicover this file:
>
> >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
> >>>>>>>>>>>>>>>
> /*DESCRIPTION
> This module contains chip-dependent routines written in
> assembly language.
> */
>
> #include <linux/config.h>
> #include <asm/processor.h>
> #include <asm/cache.h>
> #include <asm-ppc/ppc_asm.h>
>
> #define _ASMLANGUAGE
>
> .globl sidma_AsDmaRegSet_F
> .globl sidma_AsDmaRegGet_F
> .globl AsfnDmapolGet
> [etc...  ]
>
> .text
>
> /*************************************************************
> ******************
> * sidmai_AsDmaRegSet_F(reg, val) --> Set specified "reg" with
> value "val"
> *
> * Return : N/A
> *
> * void sidma_AsDmaRegSet_F(uLong reg, uLong val)
> */
> sidma_AsDmaRegSet_F:
>        mflr r5
>        bl next_inst
>        next_inst:
>        mflr r6
>       add r6,r6,r3
>       addi r6,r6,20
>
> [etc...  ]
>
> <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
> <<<<<<<<<<<<<<<<<<
>
> To compile this, I use the following lines in a makefile:
> >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
> >>>>>>>>>>
> AS = ppc_405-gcc
> CFLAGS_AS = -gdwarf -mcpu=405 -mstrict-align -nostdinc
> -fvolatile -fno-builtin -fno-for-scope -P -x assembler -
> D__KERNEL__ -DCPU=PPC405 -DPRJ_BUILD $(ALLINCLUDE)
> -I$(SRC_PATH)/basic/services/include
> -I$(SRC_PATH)/basic/ascii/include
> -I$(SRC_PATH)/basic/hdwctl/include
> -I$(SRC_PATH)/basic/core/include
> -I$(SRC_PATH)/basic/hscx/include
> -I$(SRC_PATH)/basic/enet/include -I$(SRC_PATH)/eq/include
> -I$(SRC_PATH)/pzm/include -I$(SRC_PATH)/startup/init
> -I$(SRC_PATH)/startup/maint -O0 -DEQ_CODE
> ppcsiafn.o:
>       $(AS) $(CFLAGS_AS) -c
> $(SRC_PATH)/startup/init/ppcsiafn.s -o ppcsiafn.o
>
> <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
> <<<<<<<<<
>
> nb: don't worry the CFLAGS_AS is on a single line in my makefile
>
> All that things to get the following compilation result:
> >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
> >>>>>>>>>
> $> make all
> /home/jgarcia/Desktop/kernel/ssc/startup/init/ppcsiafn.s:
> Assembler messages:
> /home/jgarcia/Desktop/kernel/ssc/startup/init/ppcsiafn.s:83:
> Error: unsupported relocation against r5
> /home/jgarcia/Desktop/kernel/ssc/startup/init/ppcsiafn.s:86:
> Error: unsupported relocation against r6
> /home/jgarcia/Desktop/kernel/ssc/startup/init/ppcsiafn.s:87:
> Error: unsupported relocation against r6
> /home/jgarcia/Desktop/kernel/ssc/startup/init/ppcsiafn.s:87:
> Error: unsupported relocation against r6
> <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
> <<<<<<<<<<
>
> After a lot of tests, here are my conclusions: the different
> "#include" are not considered by the compiler. Indeed, I
> tried to introduce compilation errors in the different ".h"
> files --> no difference in the result
> If I suppress the # in the #include --> the compiler tells me
> that is not a valid op code
> So I guess that but I don't know why : the character "#" is
> understood as a comment (equivalent to /* ...*/).
>
> To conclude : is there a specific compil option to give to
> gcc for it to understand the #include command?
> I checked the different linux assembler file and the #include
> is used. So why am I not able to use it?
>
> Thanks for your help !
>
>
>   Jérémie
>
>


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