pc-chainloader bootcheck

grub-core/tests/boot/pc-chainloader.S

@@ -0,0 +1,63 @@
+
+#define SHUTDOWN_PORT 0x8900
+
+	.text
+	.globl _start
+_start:
+base:	
+	.code16
+	jmp cont
+
+portmsg:
+	xorw %ax, %ax
+1:	
+	movb 0(%si), %al
+	test %ax, %ax
+	jz 1f
+	outb %al, %dx
+	incw %si
+	jmp 1b
+1:
+	ret
+
+serialmsg:	
+1:	
+	movb 0(%si), %bl
+	testb %bl, %bl
+	jz 1f
+	movw $0x3fd, %dx
+2:	
+	inb %dx, %al
+	testb $0x20, %al
+	jz   2b
+
+	movw $0x3f8, %dx
+	movb %bl, %al
+	outb %al, %dx
+	incw %si
+	jmp 1b
+1:
+	ret
+
+cont:	
+	xorw %ax, %ax
+	movw %ax, %ds
+	lea message, %si
+	call serialmsg
+	lea shutdown, %si
+	movw $SHUTDOWN_PORT, %dx
+	call portmsg
+
+1:
+	hlt
+	jmp 1b
+
+shutdown:
+	.ascii "Shutdown"
+	.byte 0
+message:
+	.ascii "Boot Test Passed Successfully\n" SUCCESSFUL_BOOT_STRING "\n"
+	.byte 0
+
+	. = base + 510
+	.short 0xaa55

grub-core/tests/boot/pc-chainloader.cfg

@@ -0,0 +1,4 @@
+chainloader /pc-chainloader.bin
+boot
+# Shouln't happen
+halt