Provide a memcpy() function that we can use at UEFI runtime.
Signed-off-by: Heinrich Schuchardt xypron.glpk@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