Function preload_search_info

freebsd/kern/subr_module.c:163–205

* Given a preloaded module handle (mod), return a pointer * to the data for the attribute (inf). */

 * to the data for the attribute (inf).
 */
caddr_t
preload_search_info(caddr_t mod, int inf)
{
    caddr_t	curp;
    uint32_t	*hdr;
    uint32_t	type = 0;
    int		next;

    if (mod == NULL)
    	return (NULL);

    curp = mod;
    for (;;) {
	hdr = (uint32_t *)curp;
	/* end of module data? */
	if (hdr[0] == 0 && hdr[1] == 0)
	    break;
	/* 
	 * We give up once we've looped back to what we were looking at 
	 * first - this should normally be a MODINFO_NAME field.
	 */
	if (type == 0) {
	    type = hdr[0];
	} else {
	    if (hdr[0] == type)
		break;
	}

	/* 
	 * Attribute match? Return pointer to data.
	 * Consumer may safely assume that size value precedes	
	 * data.
	 */
	if (hdr[0] == inf)
	    return(curp + (sizeof(uint32_t) * 2));

	/* skip to next field */
	next = sizeof(uint32_t) * 2 + hdr[1];
	next = roundup(next, sizeof(u_long));
	curp += next;
    }
    return(NULL);
}

/*
 * Delete a preload record by name.