Function preload_delete_name

freebsd/kern/subr_module.c:210–255

* Delete a preload record by name. */

 * Delete a preload record by name.
 */
void
preload_delete_name(const char *name)
{
    caddr_t	addr, curp;
    uint32_t	*hdr, sz;
    int		next;
    int		clearing;

    addr = 0;
    sz = 0;
    
    if (preload_metadata != NULL) {
	clearing = 0;
	curp = preload_metadata;
	for (;;) {
	    hdr = (uint32_t *)curp;
	    if (hdr[0] == MODINFO_NAME || (hdr[0] == 0 && hdr[1] == 0)) {
		/* Free memory used to store the file. */
		if (addr != 0 && sz != 0)
		    kmem_bootstrap_free((vm_offset_t)addr, sz);
		addr = 0;
		sz = 0;

		if (hdr[0] == 0)
		    break;
		if (!strcmp(name, curp + sizeof(uint32_t) * 2))
		    clearing = 1;	/* got it, start clearing */
		else if (clearing) {
		    clearing = 0;	/* at next one now.. better stop */
		}
	    }
	    if (clearing) {
		if (hdr[0] == MODINFO_ADDR)
		    addr = *(caddr_t *)(curp + sizeof(uint32_t) * 2);
		else if (hdr[0] == MODINFO_SIZE)
		    sz = *(uint32_t *)(curp + sizeof(uint32_t) * 2);
		hdr[0] = MODINFO_EMPTY;
	    }

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

void *
preload_fetch_addr(caddr_t mod)