Re: [arm-gnu] Fwd: Doubts regarding compatilbility issues between codesourcery assembler file and RVDS assembler file.

[Abhinav Varma <abhinavvarma.13@xxxxxxxxx>]

Hello Richard,

I am still inexperienced in ARM assembly programming, but when I try
assembling the Codesourcery (arm-none-eabi-as) compatible .S source
file, it gives errors. The errors are because the syntax for
directives are different in both assemblers. As an example arm-as has
.macro and .endm while armasm has MACRO and MEND respectively. So,
when I wish to convert the source code, I mean mapping these
directives so that the code becomes compatible with armasm assembler.

Thanks and Regards
Abhinav




On Thu, Aug 12, 2010 at 11:12 PM, Richard Earnshaw <rearnsha@xxxxxxx> wrote:
>
> On Thu, 2010-08-12 at 17:42 +0530, Abhinav Varma wrote:
>> Hey,
>>
>> I have a arm assembly source code whichi is compatible with
>> CodeSourcery's arm-none-eabi-as. I also want to run it on RVCT 4.0
>> armasm. But I am getting lot of errors as GAS and ARMASM aren't
>> compatible. Is there any method to convert an assembly code from
>> CodeSourcery's assembler to RVCT's assembler?
>>
>> Initially I was trying the preprocessing on the armcc compiler which
>> was unable to preprocess #error and the #define function directives.
>> But then I thought that since they are already supported by
>> arm-none-eabi-gcc, so lets run the preprocessor on the arm-gcc
>> compiler. The generated assembly code (remember the file had assembly
>> code with some C style directives) needs to be converted to arm-asm
>> style code for which I have started working on mapping the
>> instructions. I have problems mapping the following (arm-none-eabi-as)
>> directives. If you have any information about which directives replace
>> them on arm-asm, it would be very helpful.
>>
>> 1) .word
>> 2) .size myFunc, . -myFunc
>> 3) .org 0x6a1
>> 4) .fill 0x100,4,~0x1353A318
>>
>> Thanks and Regards
>> Abhinav
>
> Both ARMASM and GAS use the same object file format (governed by the
> ABI).  Is there any reason why you can't continue to use GAS for this
> file?
>
> R.
>
>