foo.diff

diff --git a/arch/x86/purgatory/string.c b/arch/x86/purgatory/string.c
index 3cb67d44ca31..d2b2364ea2e8 100644
--- a/arch/x86/purgatory/string.c
+++ b/arch/x86/purgatory/string.c
@@ -10,4 +10,27 @@
 
 #include <linux/types.h>
 
-#include "../boot/compressed/string.c"
+#include "../boot/string.c"
+
+void *memcpy(void *dst, const void *src, size_t len)
+{
+	asm(
+		"movq %0, %%rax\n\t"
+		"movq %2, %%rcx\n\t"
+		"rep movsb\n\t"
+	: "=r"(dst) : "r"(src), "ri"(len) : "rax", "rcx", "memory");
+	return dst;
+}
+
+void *memset(void *dst, int c, size_t len)
+{
+	void* ret;
+	asm(
+		"movq %1, %%r8\n\t"
+		"movl %2, %%eax\n\t"
+		"movq %3, %%rcx\n\t"
+		"rep stosb\n\t"
+		"movq %%r8, %0"
+	: "=r"(ret) : "r"(dst), "ri"(c), "ri"(len) : "r8", "eax", "rcx", "memory");
+	return ret;
+}