From:	Nate Eldredge <neldredge AT hmc DOT edu>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Accessing variables in assembler
Date:	Sat, 09 Oct 1999 17:58:52 -0700
Organization:	Harvey Mudd College
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yhirsch wrote:
> 
> Hi,
>     I'm trying to access function variables inside __asm__ without
> loading them
>     in advance ( for example, ... : :"a"(my_int) - which loads my_int to
> %eax). How do
>     I access them inside the __asm__ part? When I opened the
> disassembler window,
>     it shows something like this: 0xc(%ebp), or something similar to
> this. How do I know
>     where they are in the memory? How do I access them?

You probably want something like

asm("frob %0" : : "g" (my_int));

The "g" constraint indicates that my_int can be in memory or in a
register.  %0 matches the 0th (i.e. first) operand.
-- 

Nate Eldredge
neldredge AT hmc DOT edu

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