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@@ -0,0 +1,149 @@
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+// SPDX-License-Identifier: GPL-2.0+
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+/*
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+ * EFI boot manager
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+ *
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+ * Copyright (c) 2018 AKASHI Takahiro, et.al.
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+ */
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+
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+#define LOG_CATEGORY LOGC_EFI
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+
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+#include <common.h>
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+#include <charset.h>
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+#include <log.h>
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+#include <malloc.h>
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+#include <efi_loader.h>
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+#include <asm/unaligned.h>
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+
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+/**
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+ * efi_set_load_options() - set the load options of a loaded image
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+ *
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+ * @handle: the image handle
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+ * @load_options_size: size of load options
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+ * @load_options: pointer to load options
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+ * Return: status code
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+ */
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+efi_status_t efi_set_load_options(efi_handle_t handle,
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+ efi_uintn_t load_options_size,
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+ void *load_options)
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+{
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+ struct efi_loaded_image *loaded_image_info;
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+ efi_status_t ret;
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+
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+ ret = EFI_CALL(systab.boottime->open_protocol(
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+ handle,
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+ &efi_guid_loaded_image,
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+ (void **)&loaded_image_info,
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+ efi_root, NULL,
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+ EFI_OPEN_PROTOCOL_BY_HANDLE_PROTOCOL));
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+ if (ret != EFI_SUCCESS)
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+ return EFI_INVALID_PARAMETER;
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+
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+ loaded_image_info->load_options = load_options;
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+ loaded_image_info->load_options_size = load_options_size;
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+
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+ return EFI_CALL(systab.boottime->close_protocol(handle,
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+ &efi_guid_loaded_image,
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+ efi_root, NULL));
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+}
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+
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+/**
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+ * efi_deserialize_load_option() - parse serialized data
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+ *
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+ * Parse serialized data describing a load option and transform it to the
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+ * efi_load_option structure.
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+ *
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+ * @lo: pointer to target
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+ * @data: serialized data
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+ * @size: size of the load option, on return size of the optional data
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+ * Return: status code
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+ */
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+efi_status_t efi_deserialize_load_option(struct efi_load_option *lo, u8 *data,
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+ efi_uintn_t *size)
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+{
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+ efi_uintn_t len;
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+
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+ len = sizeof(u32);
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+ if (*size < len + 2 * sizeof(u16))
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+ return EFI_INVALID_PARAMETER;
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+ lo->attributes = get_unaligned_le32(data);
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+ data += len;
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+ *size -= len;
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+
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+ len = sizeof(u16);
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+ lo->file_path_length = get_unaligned_le16(data);
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+ data += len;
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+ *size -= len;
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+
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+ lo->label = (u16 *)data;
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+ len = u16_strnlen(lo->label, *size / sizeof(u16) - 1);
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+ if (lo->label[len])
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+ return EFI_INVALID_PARAMETER;
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+ len = (len + 1) * sizeof(u16);
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+ if (*size < len)
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+ return EFI_INVALID_PARAMETER;
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+ data += len;
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+ *size -= len;
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+
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+ len = lo->file_path_length;
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+ if (*size < len)
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+ return EFI_INVALID_PARAMETER;
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+ lo->file_path = (struct efi_device_path *)data;
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+ if (efi_dp_check_length(lo->file_path, len) < 0)
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+ return EFI_INVALID_PARAMETER;
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+ data += len;
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+ *size -= len;
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+
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+ lo->optional_data = data;
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+
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+ return EFI_SUCCESS;
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+}
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+
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+/**
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+ * efi_serialize_load_option() - serialize load option
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+ *
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+ * Serialize efi_load_option structure into byte stream for BootXXXX.
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+ *
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+ * @data: buffer for serialized data
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+ * @lo: load option
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+ * Return: size of allocated buffer
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+ */
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+unsigned long efi_serialize_load_option(struct efi_load_option *lo, u8 **data)
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+{
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+ unsigned long label_len;
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+ unsigned long size;
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+ u8 *p;
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+
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+ label_len = (u16_strlen(lo->label) + 1) * sizeof(u16);
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+
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+ /* total size */
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+ size = sizeof(lo->attributes);
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+ size += sizeof(lo->file_path_length);
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+ size += label_len;
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+ size += lo->file_path_length;
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+ if (lo->optional_data)
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+ size += (utf8_utf16_strlen((const char *)lo->optional_data)
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+ + 1) * sizeof(u16);
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+ p = malloc(size);
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+ if (!p)
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+ return 0;
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+
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+ /* copy data */
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+ *data = p;
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+ memcpy(p, &lo->attributes, sizeof(lo->attributes));
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+ p += sizeof(lo->attributes);
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+
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+ memcpy(p, &lo->file_path_length, sizeof(lo->file_path_length));
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+ p += sizeof(lo->file_path_length);
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+
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+ memcpy(p, lo->label, label_len);
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+ p += label_len;
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+
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+ memcpy(p, lo->file_path, lo->file_path_length);
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+ p += lo->file_path_length;
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+
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+ if (lo->optional_data) {
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+ utf8_utf16_strcpy((u16 **)&p, (const char *)lo->optional_data);
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+ p += sizeof(u16); /* size of trailing \0 */
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+ }
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+ return size;
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+}
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