---

yaml
---
r: 58787
b: refs/heads/master
c: 5be8656
h: refs/heads/master
i:
  58785: d696658
  58783: 873ac6e
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: ad7e906d5687bb076fe6c3c980d6e013a3a42bde
+refs/heads/master: 5be865661516263d90317a6b35b588a2d7c3cb55

trunk/arch/i386/boot/copy.S

@@ -0,0 +1,101 @@
+/* ----------------------------------------------------------------------- *
+ *
+ *   Copyright (C) 1991, 1992 Linus Torvalds
+ *   Copyright 2007 rPath, Inc. - All Rights Reserved
+ *
+ *   This file is part of the Linux kernel, and is made available under
+ *   the terms of the GNU General Public License version 2.
+ *
+ * ----------------------------------------------------------------------- */
+
+/*
+ * arch/i386/boot/copy.S
+ *
+ * Memory copy routines
+ */
+
+	.code16gcc
+	.text
+
+	.globl	memcpy
+	.type	memcpy, @function
+memcpy:
+	pushw	%si
+	pushw	%di
+	movw	%ax, %di
+	movw	%dx, %si
+	pushw	%cx
+	shrw	$2, %cx
+	rep; movsl
+	popw	%cx
+	andw	$3, %cx
+	rep; movsb
+	popw	%di
+	popw	%si
+	ret
+	.size	memcpy, .-memcpy
+
+	.globl	memset
+	.type	memset, @function
+memset:
+	pushw	%di
+	movw	%ax, %di
+	movzbl	%dl, %eax
+	imull	$0x01010101,%eax
+	pushw	%cx
+	shrw	$2, %cx
+	rep; stosl
+	popw	%cx
+	andw	$3, %cx
+	rep; stosb
+	popw	%di
+	ret
+	.size	memset, .-memset
+
+	.globl	copy_from_fs
+	.type	copy_from_fs, @function
+copy_from_fs:
+	pushw	%ds
+	pushw	%fs
+	popw	%ds
+	call	memcpy
+	popw	%ds
+	ret
+	.size	copy_from_fs, .-copy_from_fs
+
+	.globl	copy_to_fs
+	.type	copy_to_fs, @function
+copy_to_fs:
+	pushw	%es
+	pushw	%fs
+	popw	%es
+	call	memcpy
+	popw	%es
+	ret
+	.size	copy_to_fs, .-copy_to_fs
+
+#if 0 /* Not currently used, but can be enabled as needed */
+
+	.globl	copy_from_gs
+	.type	copy_from_gs, @function
+copy_from_gs:
+	pushw	%ds
+	pushw	%gs
+	popw	%ds
+	call	memcpy
+	popw	%ds
+	ret
+	.size	copy_from_gs, .-copy_from_gs
+	.globl	copy_to_gs
+
+	.type	copy_to_gs, @function
+copy_to_gs:
+	pushw	%es
+	pushw	%gs
+	popw	%es
+	call	memcpy
+	popw	%es
+	ret
+	.size	copy_to_gs, .-copy_to_gs
+
+#endif

trunk/arch/i386/boot/string.c

@@ -0,0 +1,52 @@
+/* -*- linux-c -*- ------------------------------------------------------- *
+ *
+ *   Copyright (C) 1991, 1992 Linus Torvalds
+ *   Copyright 2007 rPath, Inc. - All Rights Reserved
+ *
+ *   This file is part of the Linux kernel, and is made available under
+ *   the terms of the GNU General Public License version 2.
+ *
+ * ----------------------------------------------------------------------- */
+
+/*
+ * arch/i386/boot/string.c
+ *
+ * Very basic string functions
+ */
+
+#include "boot.h"
+
+int strcmp(const char *str1, const char *str2)
+{
+	const unsigned char *s1 = (const unsigned char *)str1;
+	const unsigned char *s2 = (const unsigned char *)str2;
+	int delta = 0;
+
+	while (*s1 || *s2) {
+		delta = *s2 - *s1;
+		if (delta)
+			return delta;
+		s1++;
+		s2++;
+	}
+	return 0;
+}
+
+size_t strnlen(const char *s, size_t maxlen)
+{
+	const char *es = s;
+	while (*es && maxlen) {
+		es++;
+		maxlen--;
+	}
+
+	return (es - s);
+}
+
+unsigned int atou(const char *s)
+{
+	unsigned int i = 0;
+	while (isdigit(*s))
+		i = i * 10 + (*s++ - '0');
+	return i;
+}