svn commit: r246105 - in projects/uefi/sys/boot/i386/efi: . i386

[Benno Rice]

Author: benno
Date: Wed Jan 30 01:30:06 2013
New Revision: 246105
URL: http://svnweb.freebsd.org/changeset/base/246105

Log:
  Move the original start.S to i386/start.S correctly.
  
  Sponsored by:	FreeBSD Foundation

Replaced:
  projects/uefi/sys/boot/i386/efi/i386/start.S
     - copied unchanged from r246098, projects/uefi/sys/boot/i386/efi/start.S
Deleted:
  projects/uefi/sys/boot/i386/efi/start.S

Copied: projects/uefi/sys/boot/i386/efi/i386/start.S (from r246098, projects/uefi/sys/boot/i386/efi/start.S)
==============================================================================
--- /dev/null	00:00:00 1970	(empty, because file is newly added)
+++ projects/uefi/sys/boot/i386/efi/i386/start.S	Wed Jan 30 01:30:06 2013	(r246105, copy of r246098, projects/uefi/sys/boot/i386/efi/start.S)
@@ -0,0 +1,70 @@
+/*-
+ * Copyright (c) 2008-2010 Rui Paulo <rpaulo at FreeBSD.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	$FreeBSD$
+ */
+
+	.text
+
+#include <machine/asm.h>
+
+#define EFI_SUCCESS		0
+
+/*
+ * EFI entry point. 
+ * _start(EFI_IMAGE image_handle, EFI_SYSTEM_TABLE *system_table);
+ *
+ * We calculate the base address along with _DYNAMIC, relocate us and finally
+ * pass control to efi_main.
+ */
+
+ENTRY(_start)
+	pushl	%ebp
+	movl	%esp, %ebp
+
+	pushl	12(%ebp)	/* image_handle */
+	pushl	8(%ebp)		/* system_table */
+	call	0f
+0:	popl	%eax
+	movl	%eax, %ebx
+	addl	$ImageBase-0b, %eax
+	addl	$_DYNAMIC-0b, %ebx
+	pushl	%ebx		/* dynamic */
+	pushl	%eax		/* ImageBase */
+	call	_reloc
+	cmpl	$EFI_SUCCESS, %eax
+	jne	1f
+	popl	%ebx		/* remove ImageBase from the stack */
+	popl	%ebx		/* remove dynamic from the stack */
+	call	efi_main
+1:	leave
+	ret
+END(_start)
+
+	.data
+	.section .reloc, "a"
+	.long	0
+	.long	10
+	.word	0