On 12/13/05, Ashutosh Naik <[email protected]> wrote:
> On 12/13/05, Rusty Russell <[email protected]> wrote:
> >
> > How about something like:
> >
> > const struct kernel_symbol *sym;
> > unsigned int i;
> > const unsigned long *crc;
> > struct module *owner;
> >
> > spin_lock_irq(&modlist_lock);
> > for (i = 0; i < mod->num_syms; i++)
> > if (__find_symbol(mod->syms[i].name, &owner, &crc, 1))
> > goto dup;
> > for (i = 0; i < num->num_gpl_syms; i++)
> > if (__find_symbol(mod->gpl_syms[i].name,&owner,&crc,1))
> > goto dup;
> > spin_unlock_irq(&modlist_lock);
> > return 0;
> > dup:
> > printk("%s: exports duplicate symbol (owned by %s)\n",
> > mod->name, module_name(owner));
> > return -ENOEXEC;
> > }
>
> Have tried that in the attached patch. However, mod->syms[i].name
> would be valid only after a long relocation for loop has run through.
> While this adds a wee bit extra overhead, that overhead is only in the
> case where the module does actually export a Duplicate Symbol.
Forgot to add
Signed-off-by: Ashutosh Naik <[email protected]>
Signed-off-by: Anand Krishnan <[email protected]>
Cheers
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