On Thursday 29 December 2005 22.44, Ted Unangst wrote:
> On 12/29/05, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
> > -fstack-protector : Enable stack protection for functions which contain
> > character arrays.
> > -fno-stack-protector : Disable use of stack protection (ProPolice).
> > -fstack-protector-all : Enable stack protection for all functions.
> > -fno-stack-protector-all : Disables stack protection for all functions.
> >
> > this does not yet explain the observed behavior since 'foo' contains a
> > character array. but it pointed me to fstack-protector-all. using this
> > option the smash is caught.
>
> i think it has to be 8 bytes unless you are using -f-all
thanks!
wow new definition of what is a character array - i propose a change
of the c-standard :)
while it makes sense in practise it is quite confusing.
-> this should defiantly be put into the man-page!
thanks again
>
> > why only the smash in the main is detected?
> >
> > i used the following example:
> >
> > #include <stdio.h>
> >
> > char *src = "sehr langer string";
> >
> > void foo( char * src )
> > {
> > char dst[5];
> > strcpy( dst, src );
> > }
> > int main(int argc, char* argv[])
> > {
> > #ifdef SMASH_MAIN
> > char dst[5];
> > strcpy( dst, src );
> > #else
> > foo( src );
> > #endif
> > return 0;
> > }
