Provide a memcpy() function that we can use at UEFI runtime.
Signed-off-by: Heinrich Schuchardt <xypron.g...@gmx.de>
---
include/efi_loader.h | 3 +++
lib/efi_loader/efi_runtime.c | 19 +++++++++++++++++++
2 files changed, 22 insertions(+)
diff --git a/include/efi_loader.h b/include/efi_loader.h
index fe8774f133..bf03a89ca5 100644
--- a/include/efi_loader.h
+++ b/include/efi_loader.h
@@ -789,6 +789,9 @@ bool efi_secure_boot_enabled(void);
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 a4aa1d8b6c..5b6506fbdc 100644
--- a/lib/efi_loader/efi_runtime.c
+++ b/lib/efi_loader/efi_runtime.c
@@ -137,6 +137,25 @@ efi_status_t efi_init_runtime_supported(void)
return ret;
}
+/**
+ * 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
*
--
2.27.0
