[MPlayer-dev-eng] OT: loader/stubs.s:EH_prolog convertion to C

[Michael Niedermayer]

Hi

On Wednesday 23 October 2002 20:47, Alex Beregszaszi wrote:
> Hi,
>
> i've converted it into C using gcc __asm__, but I got some questions:
[...]
> thats not working, so i disassembled the objects: gcc is putting its own
> function-frame codes (altought my functions isn't defining any parameters)
> (note: i removed "esp", "ebp", but no sense)
>
> pushl	%ebp
> mov	%esp, %ebp
> ... (my code)
> mov	%ebp, %esp
> pop	%ebp
> ret
>
> so i did a hack, and it's now working:
> pushl	%ebp
> mov	%esp, %ebp
>
> popl	%ebp
> ... (my code) + ret
> mov	%ebp, %esp
> pop	%ebp
> ret
>
> It's working for me (tm). Are there any better solutions?
yes

try something like

asm volatile(
	"jmp 9f		\n\t"
	"0:		\n\t"
	(my code) + ret
	"9:		\n\t"
	"leal 0b, %0	\n\t"
	: "=r" (func_ptr)
);
 
Michael