1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
3 /* This program is free software; you can redistribute it and/or modify it
4 * under the terms of the GNU Lesser General Public License as published by
5 * the Free Software Foundation; either version 2.1 of the License, or
6 * (at your option) any later version.
8 * This program is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * Lesser General Public License for more details.
13 * Copyright (C) 2015 Kay Sievers <kay@vrfy.org>
24 /* magic string to find in the binary image */
25 static const char __attribute__((used)) magic[] = "#### LoaderInfo: systemd-stub " VERSION " ####";
27 static const EFI_GUID global_guid = EFI_GLOBAL_VARIABLE;
29 EFI_STATUS efi_main(EFI_HANDLE image, EFI_SYSTEM_TABLE *sys_table) {
30 EFI_LOADED_IMAGE *loaded_image;
32 CHAR16 *loaded_image_path;
35 BOOLEAN secure = FALSE;
43 UINTN addrs[ELEMENTSOF(sections)-1] = {};
44 UINTN offs[ELEMENTSOF(sections)-1] = {};
45 UINTN szs[ELEMENTSOF(sections)-1] = {};
46 CHAR8 *cmdline = NULL;
50 InitializeLib(image, sys_table);
52 err = uefi_call_wrapper(BS->OpenProtocol, 6, image, &LoadedImageProtocol, (VOID **)&loaded_image,
53 image, NULL, EFI_OPEN_PROTOCOL_GET_PROTOCOL);
55 Print(L"Error getting a LoadedImageProtocol handle: %r ", err);
56 uefi_call_wrapper(BS->Stall, 1, 3 * 1000 * 1000);
60 root_dir = LibOpenRoot(loaded_image->DeviceHandle);
62 Print(L"Unable to open root directory: %r ", err);
63 uefi_call_wrapper(BS->Stall, 1, 3 * 1000 * 1000);
64 return EFI_LOAD_ERROR;
67 loaded_image_path = DevicePathToStr(loaded_image->FilePath);
69 if (efivar_get_raw(&global_guid, L"SecureBoot", &b, &size) == EFI_SUCCESS) {
75 err = pefile_locate_sections(root_dir, loaded_image_path, sections, addrs, offs, szs);
77 Print(L"Unable to locate embedded .linux section: %r ", err);
78 uefi_call_wrapper(BS->Stall, 1, 3 * 1000 * 1000);
83 cmdline = (CHAR8 *)(loaded_image->ImageBase + addrs[0]);
87 /* if we are not in secure boot mode, accept a custom command line and replace the built-in one */
88 if (!secure && loaded_image->LoadOptionsSize > 0) {
93 options = (CHAR16 *)loaded_image->LoadOptions;
94 cmdline_len = (loaded_image->LoadOptionsSize / sizeof(CHAR16)) * sizeof(CHAR8);
95 line = AllocatePool(cmdline_len);
96 for (i = 0; i < cmdline_len; i++)
102 graphics_splash((UINT8 *)((UINTN)loaded_image->ImageBase + addrs[3]), szs[3], NULL);
104 err = linux_exec(image, cmdline, cmdline_len,
105 (UINTN)loaded_image->ImageBase + addrs[1],
106 (UINTN)loaded_image->ImageBase + addrs[2], szs[2]);
108 graphics_mode(FALSE);
109 Print(L"Execution of embedded linux image failed: %r\n", err);
110 uefi_call_wrapper(BS->Stall, 1, 3 * 1000 * 1000);