Unable to get stack trace beyond errHookRaise function.

Void errHook(Error_Block *eb)
{
Types_Site *site;
Error_Id eid;
setC55_Dbg_Err(0,0x1234);
dumpCoreRegisters();

site = Error_getSite(eb);
eid = Error_getId(eb);
/* print user supplied error code */
st_dpf("error %d: ", Error_getCode(eb));

/* check originator's mod id against known mods */
if (site->mod == Main_Module_id()) {
st_dpf("app error: ");
}

/* check error id against known errors */
if (eid == Error_E_generic) {
st_dpf("generic: ");
}
else if (eid == Assert_E_assertFailed) {
st_dpf("assertion violation: ");
}

/* perform default error output */
Error_print(eb);
crashNow();
}

This is the errHook function I am using. keep looking at eb. What kind of information can I get from this.
I would like to Program Counter PC which caused this problem, and which pointer became NULL or is there any other reason?

Regards,
Hari

What do you get from the the "Error_print(eb)" in your errHook function?