1 files changed, 45 insertions, 0 deletions
diff --git a/sys/arch/i386/stand/libsa/startprog.S b/sys/arch/i386/stand/libsa/startprog.S
new file mode 100644
index 00000000000..e1f4e267a43
--- /dev/null
+++ b/sys/arch/i386/stand/libsa/startprog.S
@@ -0,0 +1,45 @@
+/*	$OpenBSD: startprog.S,v 1.1 1997/03/31 03:12:17 weingart Exp $	*/
+
+#include <machine/asm.h>
+
+
+/*
+ * startprog(phyaddr, argv)
+ *	start the program on protected mode where phyaddr is the entry point
+ */
+ENTRY(startprog)
+	pushl	%ebp
+	movl	%esp, %ebp
+
+	# get things we need into registers
+	movl	8(%ebp), %ecx		# entry offset 
+	movl	12(%ebp), %eax		# &argv
+
+	# make a new stack at 0:0x90000 (big segs)
+	movl	$0x10, %ebx
+	movw	%bx, %ss
+	movl	$0x90000, %ebx
+	movl	%ebx, %esp
+
+	# push some number of args onto the stack
+	pushl	28(%eax)		# argv[7] = cnvmem
+	pushl	32(%eax)		# argv[8] = extmem
+	pushl	16(%eax)		# argv[4] = esym
+	pushl	12(%eax)		# argv[3] = cyl offset
+	pushl	8(%eax)			# argv[2] = bootdev
+	pushl	4(%eax)			# argv[1] = howto
+	pushl	$0			# dummy 'return' address
+
+	# push on our entry address
+	movl	$0x8, %ebx		# segment
+	pushw	%bx
+	pushl	%ecx
+
+	# convert over the other data segs
+	movl	$0x10, %ebx
+	movl	%bx, %ds
+	movl	%bx, %es
+
+	# convert the PC (and code seg)
+	lret
+