On 4/20/06, Andrew Haley <aph@xxxxxxxxxxx> wrote:> Thibaud GUERIN writes:> > hi,> > I'm actually writing a program in C and i'm fighting with an address> > dereferencing since some days now.> >> > int the_bug(const char *fmt, ...)> > {> > char **ap;> > char **s = (char **)(&fmt);> >> > /* __asm__ volatile ( */> > /* "\tleal %1, %%eax\n" */> > /* "\tmovl %%eax,%0\n" */> > /* "\tmovl %1, %%eax\n" */> > /* "\tmovl %2, %%ebx \n" */> > /* "\tmovl %%eax, (%%ebx)\n" */> > /* : "=m"(ap) : "m" (fmt), "m"(ap)); */>> This is wrong in so many ways I don't know where to start.>> It may be better if you try to tell us what you are trying to do.>> Redirecting gcc-help@xxxxxxxxxxxx
Not clear in the first message, (and maybe not in this one too..), sorry
This asm inline was something like a "test/patch code".
I try to have a simple :
char **ap = (char **)(&fmt);
working, It didn't :ap was equal to &fmt BUT *ap wasn't equal to fmt (don't kown why...)
so i try by my self... to do :
ap = &fmt;*ap = fmt;
in asm inline.... (dirty i know...)
problem is :With this asm code in the binary *s is equal to fmtWithout this asm code in the binary *s isn't equal to fmt
All the 's' variable stuffs are from my debug...Again :My only aim is to have an 'ap = &fmt' valid (->ap = &fmt AND *ap = fmt)
The resulting asm was here to help you to understand wath's wrong ....I'm looking for some days now without answer...
--Thibaud
