[test] Move i386-specific tests to arch/i386/tests

Signed-off-by: Michael Brown <mcb30@ipxe.org>

src/arch/i386/tests/gdbstub_test.S

@@ -0,0 +1,54 @@
+	.arch i386
+
+	.section ".data", "aw", @progbits
+watch_me:
+	.long 0xfeedbeef
+
+	.section ".text", "ax", @progbits
+	.code32
+gdbstub_test:
+	/* 1. Read registers test */
+	movl    $0xea010203, %eax
+	movl    $0xeb040506, %ebx
+	movl    $0xec070809, %ecx
+	movl    $0xed0a0b0c, %edx
+	movl    $0x510d0e0f, %esi
+	movl    $0xd1102030, %edi
+	int	$3
+
+	/* 2. Write registers test */
+	int	$3
+
+	/* 3. Read memory test */
+	subl	$8, %esp
+	movl	$0x11223344, 4(%esp)
+	movw	$0x5566, 2(%esp)
+	movb	$0x77, (%esp)
+	int	$3
+
+	/* 4. Write memory test */
+	int	$3
+	addl	$8, %esp
+
+	/* 5. Step test */
+	int	$3
+	nop
+
+	/* 6. Access watch test */
+	movl	$0x600d0000, %ecx
+	movl	watch_me, %eax
+	movl	$0xbad00000, %ecx
+	int	$3
+	movl	$0x600d0001, %ecx
+	movl	%eax, watch_me
+	movl	$0xbad00001, %ecx
+	int	$3
+
+	/* 7. Write watch test */
+	movl	$0x600d0002, %ecx
+	movl	%eax, watch_me
+	movl	$0xbad00002, %ecx
+	int	$3
+
+1:
+	jmp	1b