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... ]
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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
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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
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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 !
J?r?mie
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