[tcf-dev] How to detect if a symbol is COMMON ?

[Xavier Pouyollon <xavier.pouyollon@xxxxxxxxxxxxx>]

Hi Eugene,

In symbols_elf.c:has_symbol_address, I need to determine, in case of 
vxWorks common support for kernel modules, if a symbol is common or not.

sym->obj != NULL so we have the debug infos.
In that case, sym->tbl is then NULL so it's not easy to know the symbol 
type.

Can I assume the following:
    if (sym->obj != NULL) {
        if (sym->obj->mFlags & DOIF_location) {
            /* AT_location defined, so we have an address */

            /* VxWorks common : The DKM do have AT_location but we 
don't have the relocation */
            /* Either the extension point  ELF_SYMS_GET_ADDR returns 
the defined common */
            /* OR we need to go down in the search to find a non-common 
symbol. */
            if  (sym->obj->mFlags & DOIF_external)
                return 0;
            else
                return 1;
        }

Any better proposal ?

PS : In that case, the DKM has:
WIND_TCB * taskIdCurrent;

and taskIdCurrent being defined in the vxWorks kernel.
Our extension point only returns addresses for defined common for a 
given module.
In that case, the common is resolved (into the kernel)
so the extension point doesn't return an address so I need to continue 
the search.

Thanks !
Very Best Regards,
Xavier.