[prefix] Halt system without burning CPU if we cannot access the payload

Signed-off-by: Michael Brown <mcb30@ipxe.org>
ipxe · Aug 26, 2014 · 9d21e13 · 9d21e13
1 parent bfe9f06
commit 9d21e13
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/src/arch/i386/prefix/libprefix.S b/src/arch/i386/prefix/libprefix.S
@@ -748,7 +748,10 @@ a20_death_message:
 	call	print_hex_dword
 	movw	$payload_death_message, %si
 	call	print_message
-2:	jmp	2b
+2:	/* Halt system */
+	cli
+	hlt
+	jmp	2b
 	.section ".prefix.data", "aw", @progbits
 payload_death_message:
 	.asciz	"\nPayload inaccessible - cannot continue\n"