[PATCH 1/2] efi_loader: move load options to new module

[Heinrich Schuchardt]

Move all load options related functions to a new module. So that they can
be compiled independently.

Signed-off-by: Heinrich Schuchardt <xypron.glpk at gmx.de>
---
 lib/efi_loader/efi_load_options.c | 151 ++++++++++++++++++++++++++++++
 1 file changed, 151 insertions(+)
 create mode 100644 lib/efi_loader/efi_load_options.c

diff --git a/lib/efi_loader/efi_load_options.c b/lib/efi_loader/efi_load_options.c
new file mode 100644
index 0000000000..9f0e25b6e9
--- /dev/null
+++ b/lib/efi_loader/efi_load_options.c
@@ -0,0 +1,151 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ *  EFI boot manager
+ *
+ *  Copyright (c) 2017 Rob Clark
+ */
+
+#define LOG_CATEGORY LOGC_EFI
+
+#include <common.h>
+#include <charset.h>
+#include <log.h>
+#include <malloc.h>
+#include <efi_loader.h>
+//#include <efi_variable.h>
+#include <asm/unaligned.h>
+
+/**
+ * efi_set_load_options() - set the load options of a loaded image
+ *
+ * @handle:		the image handle
+ * @load_options_size:	size of load options
+ * @load_options:	pointer to load options
+ * Return:		status code
+ */
+efi_status_t efi_set_load_options(efi_handle_t handle,
+				  efi_uintn_t load_options_size,
+				  void *load_options)
+{
+	struct efi_loaded_image *loaded_image_info;
+	efi_status_t ret;
+
+	ret = EFI_CALL(systab.boottime->open_protocol(
+					handle,
+					&efi_guid_loaded_image,
+					(void **)&loaded_image_info,
+					efi_root, NULL,
+					EFI_OPEN_PROTOCOL_BY_HANDLE_PROTOCOL));
+	if (ret != EFI_SUCCESS)
+		return EFI_INVALID_PARAMETER;
+
+	loaded_image_info->load_options = load_options;
+	loaded_image_info->load_options_size = load_options_size;
+
+	return EFI_CALL(systab.boottime->close_protocol(handle,
+							&efi_guid_loaded_image,
+							efi_root, NULL));
+}
+
+/**
+ * efi_deserialize_load_option() - parse serialized data
+ *
+ * Parse serialized data describing a load option and transform it to the
+ * efi_load_option structure.
+ *
+ * @lo:		pointer to target
+ * @data:	serialized data
+ * @size:	size of the load option, on return size of the optional data
+ * Return:	status code
+ */
+efi_status_t efi_deserialize_load_option(struct efi_load_option *lo, u8 *data,
+					 efi_uintn_t *size)
+{
+	efi_uintn_t len;
+
+	len = sizeof(u32);
+	if (*size < len + 2 * sizeof(u16))
+		return EFI_INVALID_PARAMETER;
+	lo->attributes = get_unaligned_le32(data);
+	data += len;
+	*size -= len;
+
+	len = sizeof(u16);
+	lo->file_path_length = get_unaligned_le16(data);
+	data += len;
+	*size -= len;
+
+	lo->label = (u16 *)data;
+	len = u16_strnlen(lo->label, *size / sizeof(u16) - 1);
+	if (lo->label[len])
+		return EFI_INVALID_PARAMETER;
+	len = (len + 1) * sizeof(u16);
+	if (*size < len)
+		return EFI_INVALID_PARAMETER;
+	data += len;
+	*size -= len;
+
+	len = lo->file_path_length;
+	if (*size < len)
+		return EFI_INVALID_PARAMETER;
+	lo->file_path = (struct efi_device_path *)data;
+	if (efi_dp_check_length(lo->file_path, len) < 0)
+		return EFI_INVALID_PARAMETER;
+	data += len;
+	*size -= len;
+
+	lo->optional_data = data;
+
+	return EFI_SUCCESS;
+}
+
+/**
+ * efi_serialize_load_option() - serialize load option
+ *
+ * Serialize efi_load_option structure into byte stream for BootXXXX.
+ *
+ * @data:	buffer for serialized data
+ * @lo:		load option
+ * Return:	size of allocated buffer
+ */
+unsigned long efi_serialize_load_option(struct efi_load_option *lo, u8 **data)
+{
+	unsigned long label_len;
+	unsigned long size;
+	u8 *p;
+
+	label_len = (u16_strlen(lo->label) + 1) * sizeof(u16);
+
+	/* total size */
+	size = sizeof(lo->attributes);
+	size += sizeof(lo->file_path_length);
+	size += label_len;
+	size += lo->file_path_length;
+	if (lo->optional_data)
+		size += (utf8_utf16_strlen((const char *)lo->optional_data)
+					   + 1) * sizeof(u16);
+	p = malloc(size);
+	if (!p)
+		return 0;
+
+	/* copy data */
+	*data = p;
+	memcpy(p, &lo->attributes, sizeof(lo->attributes));
+	p += sizeof(lo->attributes);
+
+	memcpy(p, &lo->file_path_length, sizeof(lo->file_path_length));
+	p += sizeof(lo->file_path_length);
+
+	memcpy(p, lo->label, label_len);
+	p += label_len;
+
+	memcpy(p, lo->file_path, lo->file_path_length);
+	p += lo->file_path_length;
+
+	if (lo->optional_data) {
+		utf8_utf16_strcpy((u16 **)&p, (const char *)lo->optional_data);
+		p += sizeof(u16); /* size of trailing \0 */
+	}
+	return size;
+}
+
--
2.29.2