efi_loader: new function efi_memcpy_runtime()
Provide a memcpy() function that we can use at UEFI runtime.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
diff --git a/include/efi_loader.h b/include/efi_loader.h
index be6cede..98944640 100644
--- a/include/efi_loader.h
+++ b/include/efi_loader.h
@@ -792,6 +792,9 @@
bool efi_image_parse(void *efi, size_t len, struct efi_image_regions **regp,
WIN_CERTIFICATE **auth, size_t *auth_len);
+/* runtime implementation of memcpy() */
+void efi_memcpy_runtime(void *dest, const void *src, size_t n);
+
#else /* CONFIG_IS_ENABLED(EFI_LOADER) */
/* Without CONFIG_EFI_LOADER we don't have a runtime section, stub it out */
diff --git a/lib/efi_loader/efi_runtime.c b/lib/efi_loader/efi_runtime.c
index a4aa1d8..5b6506f 100644
--- a/lib/efi_loader/efi_runtime.c
+++ b/lib/efi_loader/efi_runtime.c
@@ -138,6 +138,25 @@
}
/**
+ * efi_memcpy_runtime() - copy memory area
+ *
+ * At runtime memcpy() is not available.
+ *
+ * @dest: destination buffer
+ * @src: source buffer
+ * @n: number of bytes to copy
+ * Return: pointer to destination buffer
+ */
+void __efi_runtime efi_memcpy_runtime(void *dest, const void *src, size_t n)
+{
+ u8 *d = dest;
+ const u8 *s = src;
+
+ for (; n; --n)
+ *d++ = *s++;
+}
+
+/**
* efi_update_table_header_crc32() - Update crc32 in table header
*
* @table: EFI table