Naked Functions

Naked Functions

[S kris]

Hi,

I have come across some MS C code which uses 'naked' functions. How can I 
achieve a similar effect with GNU toolchain. I do not want to rewrite the 
code in assembly .s file and would prefer to do simple modifications to make 
it work with Linux.

Is the macro __attribute__((naked)) valid for the above purpose?
If not, what are the methods to generate the code for functions without its 
prolog and epilog code (naked functions) under Linux?
Is prolog and epilog  code generated by both MS tools and GNU tools 
(compilers) are same?

Please clarify the above queries.

Thanks in advance.

--Kris

_________________________________________________________________
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Re: Naked Functions

[André Wagner]

Hi,

I've read some time ago about how writing a full programm without the 
headers. It's useful for write a boot sector for example, but I'm not sure 
for functions. But you can use it as a start point...

Just compile your program like this:

gcc -c test.c
ld -o test -Ttext 0x0 -e main test.o
objcopy -R .note -R .comment -S -O binary test test.bin

HTH,

André

On Tue, 27 May 2003 19:43:59 +0530, S kris <kris_bs@hotmail.com> wrote:

> Hi,
>
> I have come across some MS C code which uses 'naked' functions. How can I 
> achieve a similar effect with GNU toolchain. I do not want to rewrite the 
> code in assembly .s file and would prefer to do simple modifications to 
> make it work with Linux.
>
> Is the macro __attribute__((naked)) valid for the above purpose?
> If not, what are the methods to generate the code for functions without 
> its prolog and epilog code (naked functions) under Linux?
> Is prolog and epilog  code generated by both MS tools and GNU tools 
> (compilers) are same?
>
> Please clarify the above queries.
>
> Thanks in advance.
>
> --Kris
>
> _________________________________________________________________
> Reconnect with old pals. Relive the happy times. 
> http://www.batchmates.com/msn.asp With just one click.
>
> -
> To unsubscribe from this list: send the line "unsubscribe linux-assembly" 
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>
>



-- 
André Wagner

HLA v1.49 is now available

[Randall Hyde]

Hi all,
HLA v1.49 is now available from the Webster download page
(http://webster.cs.ucr.edu).

HLA is the High Level Assembler for 80x86 processors. It runs under
Linux and Windows. Carefully written programs are portable between
the two OSes.

Lots of new sample code, lots of changes to the standard library,
and a few bug fixes. Also, both Windows and Linux versions of the
compiler are available with this release.

Big change: the new console routines are integrated into the standard
library (portable between Linux and Windows).
This will probably break existing applications that use the console
library routines. The older routines are available for
separate linking to maintain compatibility.

New Iczelion conversions.
New "Windows Programming in Assembly (WPA) examples.
Plus more!

Enjoy!
Randy Hyde