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-rw-r--r--src/boot/efi/boot.c2778
1 files changed, 2778 insertions, 0 deletions
diff --git a/src/boot/efi/boot.c b/src/boot/efi/boot.c
new file mode 100644
index 0000000..d7b94bc
--- /dev/null
+++ b/src/boot/efi/boot.c
@@ -0,0 +1,2778 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <efi.h>
+#include <efigpt.h>
+#include <efilib.h>
+
+#include "bcd.h"
+#include "bootspec-fundamental.h"
+#include "console.h"
+#include "devicetree.h"
+#include "disk.h"
+#include "drivers.h"
+#include "efivars-fundamental.h"
+#include "graphics.h"
+#include "initrd.h"
+#include "linux.h"
+#include "measure.h"
+#include "pe.h"
+#include "vmm.h"
+#include "random-seed.h"
+#include "secure-boot.h"
+#include "shim.h"
+#include "ticks.h"
+#include "util.h"
+#include "xbootldr.h"
+
+#ifndef GNU_EFI_USE_MS_ABI
+ /* We do not use uefi_call_wrapper() in systemd-boot. As such, we rely on the
+ * compiler to do the calling convention conversion for us. This is check is
+ * to make sure the -DGNU_EFI_USE_MS_ABI was passed to the comiler. */
+ #error systemd-boot requires compilation with GNU_EFI_USE_MS_ABI defined.
+#endif
+
+#define TEXT_ATTR_SWAP(c) EFI_TEXT_ATTR(((c) & 0b11110000) >> 4, (c) & 0b1111)
+
+/* Magic string for recognizing our own binaries */
+_used_ _section_(".sdmagic") static const char magic[] =
+ "#### LoaderInfo: systemd-boot " GIT_VERSION " ####";
+
+/* Makes systemd-boot available from \EFI\Linux\ for testing purposes. */
+_used_ _section_(".osrel") static const char osrel[] =
+ "ID=systemd-boot\n"
+ "VERSION=\"" GIT_VERSION "\"\n"
+ "NAME=\"systemd-boot " GIT_VERSION "\"\n";
+
+enum loader_type {
+ LOADER_UNDEFINED,
+ LOADER_AUTO,
+ LOADER_EFI,
+ LOADER_LINUX, /* Boot loader spec type #1 entries */
+ LOADER_UNIFIED_LINUX, /* Boot loader spec type #2 entries */
+ LOADER_SECURE_BOOT_KEYS,
+};
+
+typedef struct {
+ char16_t *id; /* The unique identifier for this entry (typically the filename of the file defining the entry) */
+ char16_t *title_show; /* The string to actually display (this is made unique before showing) */
+ char16_t *title; /* The raw (human readable) title string of the entry (not necessarily unique) */
+ char16_t *sort_key; /* The string to use as primary sort key, usually ID= from os-release, possibly suffixed */
+ char16_t *version; /* The raw (human readable) version string of the entry */
+ char16_t *machine_id;
+ EFI_HANDLE *device;
+ enum loader_type type;
+ char16_t *loader;
+ char16_t *devicetree;
+ char16_t *options;
+ char16_t **initrd;
+ char16_t key;
+ EFI_STATUS (*call)(void);
+ int tries_done;
+ int tries_left;
+ char16_t *path;
+ char16_t *current_name;
+ char16_t *next_name;
+} ConfigEntry;
+
+typedef struct {
+ ConfigEntry **entries;
+ UINTN entry_count;
+ UINTN idx_default;
+ UINTN idx_default_efivar;
+ uint32_t timeout_sec; /* Actual timeout used (efi_main() override > efivar > config). */
+ uint32_t timeout_sec_config;
+ uint32_t timeout_sec_efivar;
+ char16_t *entry_default_config;
+ char16_t *entry_default_efivar;
+ char16_t *entry_oneshot;
+ char16_t *entry_saved;
+ bool editor;
+ bool auto_entries;
+ bool auto_firmware;
+ bool reboot_for_bitlocker;
+ secure_boot_enroll secure_boot_enroll;
+ bool force_menu;
+ bool use_saved_entry;
+ bool use_saved_entry_efivar;
+ bool beep;
+ int64_t console_mode;
+ int64_t console_mode_efivar;
+ RandomSeedMode random_seed_mode;
+} Config;
+
+/* These values have been chosen so that the transitions the user sees could
+ * employ unsigned over-/underflow like this:
+ * efivar unset ↔ force menu ↔ no timeout/skip menu ↔ 1 s ↔ 2 s ↔ … */
+enum {
+ TIMEOUT_MIN = 1,
+ TIMEOUT_MAX = UINT32_MAX - 2U,
+ TIMEOUT_UNSET = UINT32_MAX - 1U,
+ TIMEOUT_MENU_FORCE = UINT32_MAX,
+ TIMEOUT_MENU_HIDDEN = 0,
+ TIMEOUT_TYPE_MAX = UINT32_MAX,
+};
+
+enum {
+ IDX_MAX = INT16_MAX,
+ IDX_INVALID,
+};
+
+static void cursor_left(UINTN *cursor, UINTN *first) {
+ assert(cursor);
+ assert(first);
+
+ if ((*cursor) > 0)
+ (*cursor)--;
+ else if ((*first) > 0)
+ (*first)--;
+}
+
+static void cursor_right(
+ UINTN *cursor,
+ UINTN *first,
+ UINTN x_max,
+ UINTN len) {
+
+ assert(cursor);
+ assert(first);
+
+ if ((*cursor)+1 < x_max)
+ (*cursor)++;
+ else if ((*first) + (*cursor) < len)
+ (*first)++;
+}
+
+static bool line_edit(
+ char16_t **line_in,
+ UINTN x_max,
+ UINTN y_pos) {
+
+ _cleanup_free_ char16_t *line = NULL, *print = NULL;
+ UINTN size, len, first = 0, cursor = 0, clear = 0;
+
+ assert(line_in);
+
+ len = strlen16(*line_in);
+ size = len + 1024;
+ line = xnew(char16_t, size);
+ print = xnew(char16_t, x_max + 1);
+ strcpy16(line, strempty(*line_in));
+
+ for (;;) {
+ EFI_STATUS err;
+ uint64_t key;
+ UINTN j;
+ UINTN cursor_color = TEXT_ATTR_SWAP(COLOR_EDIT);
+
+ j = MIN(len - first, x_max);
+ memcpy(print, line + first, j * sizeof(char16_t));
+ while (clear > 0 && j < x_max) {
+ clear--;
+ print[j++] = ' ';
+ }
+ print[j] = '\0';
+
+ /* See comment at edit_line() call site for why we start at 1. */
+ print_at(1, y_pos, COLOR_EDIT, print);
+
+ if (!print[cursor])
+ print[cursor] = ' ';
+ print[cursor+1] = '\0';
+ do {
+ print_at(cursor + 1, y_pos, cursor_color, print + cursor);
+ cursor_color = TEXT_ATTR_SWAP(cursor_color);
+
+ err = console_key_read(&key, 750 * 1000);
+ if (!IN_SET(err, EFI_SUCCESS, EFI_TIMEOUT, EFI_NOT_READY))
+ return false;
+
+ print_at(cursor + 1, y_pos, COLOR_EDIT, print + cursor);
+ } while (err != EFI_SUCCESS);
+
+ switch (key) {
+ case KEYPRESS(0, SCAN_ESC, 0):
+ case KEYPRESS(EFI_CONTROL_PRESSED, 0, 'c'):
+ case KEYPRESS(EFI_CONTROL_PRESSED, 0, 'g'):
+ case KEYPRESS(EFI_CONTROL_PRESSED, 0, CHAR_CTRL('c')):
+ case KEYPRESS(EFI_CONTROL_PRESSED, 0, CHAR_CTRL('g')):
+ return false;
+
+ case KEYPRESS(0, SCAN_HOME, 0):
+ case KEYPRESS(EFI_CONTROL_PRESSED, 0, 'a'):
+ case KEYPRESS(EFI_CONTROL_PRESSED, 0, CHAR_CTRL('a')):
+ /* beginning-of-line */
+ cursor = 0;
+ first = 0;
+ continue;
+
+ case KEYPRESS(0, SCAN_END, 0):
+ case KEYPRESS(EFI_CONTROL_PRESSED, 0, 'e'):
+ case KEYPRESS(EFI_CONTROL_PRESSED, 0, CHAR_CTRL('e')):
+ /* end-of-line */
+ cursor = len - first;
+ if (cursor+1 >= x_max) {
+ cursor = x_max-1;
+ first = len - (x_max-1);
+ }
+ continue;
+
+ case KEYPRESS(0, SCAN_DOWN, 0):
+ case KEYPRESS(EFI_ALT_PRESSED, 0, 'f'):
+ case KEYPRESS(EFI_CONTROL_PRESSED, SCAN_RIGHT, 0):
+ /* forward-word */
+ while (line[first + cursor] == ' ')
+ cursor_right(&cursor, &first, x_max, len);
+ while (line[first + cursor] && line[first + cursor] != ' ')
+ cursor_right(&cursor, &first, x_max, len);
+ continue;
+
+ case KEYPRESS(0, SCAN_UP, 0):
+ case KEYPRESS(EFI_ALT_PRESSED, 0, 'b'):
+ case KEYPRESS(EFI_CONTROL_PRESSED, SCAN_LEFT, 0):
+ /* backward-word */
+ if ((first + cursor) > 0 && line[first + cursor-1] == ' ') {
+ cursor_left(&cursor, &first);
+ while ((first + cursor) > 0 && line[first + cursor] == ' ')
+ cursor_left(&cursor, &first);
+ }
+ while ((first + cursor) > 0 && line[first + cursor-1] != ' ')
+ cursor_left(&cursor, &first);
+ continue;
+
+ case KEYPRESS(0, SCAN_RIGHT, 0):
+ case KEYPRESS(EFI_CONTROL_PRESSED, 0, 'f'):
+ case KEYPRESS(EFI_CONTROL_PRESSED, 0, CHAR_CTRL('f')):
+ /* forward-char */
+ if (first + cursor == len)
+ continue;
+ cursor_right(&cursor, &first, x_max, len);
+ continue;
+
+ case KEYPRESS(0, SCAN_LEFT, 0):
+ case KEYPRESS(EFI_CONTROL_PRESSED, 0, 'b'):
+ case KEYPRESS(EFI_CONTROL_PRESSED, 0, CHAR_CTRL('b')):
+ /* backward-char */
+ cursor_left(&cursor, &first);
+ continue;
+
+ case KEYPRESS(EFI_CONTROL_PRESSED, SCAN_DELETE, 0):
+ case KEYPRESS(EFI_ALT_PRESSED, 0, 'd'):
+ /* kill-word */
+ clear = 0;
+
+ UINTN k;
+ for (k = first + cursor; k < len && line[k] == ' '; k++)
+ clear++;
+ for (; k < len && line[k] != ' '; k++)
+ clear++;
+
+ for (UINTN i = first + cursor; i + clear < len; i++)
+ line[i] = line[i + clear];
+ len -= clear;
+ line[len] = '\0';
+ continue;
+
+ case KEYPRESS(EFI_CONTROL_PRESSED, 0, 'w'):
+ case KEYPRESS(EFI_CONTROL_PRESSED, 0, CHAR_CTRL('w')):
+ case KEYPRESS(EFI_ALT_PRESSED, 0, CHAR_BACKSPACE):
+ /* backward-kill-word */
+ clear = 0;
+ if ((first + cursor) > 0 && line[first + cursor-1] == ' ') {
+ cursor_left(&cursor, &first);
+ clear++;
+ while ((first + cursor) > 0 && line[first + cursor] == ' ') {
+ cursor_left(&cursor, &first);
+ clear++;
+ }
+ }
+ while ((first + cursor) > 0 && line[first + cursor-1] != ' ') {
+ cursor_left(&cursor, &first);
+ clear++;
+ }
+
+ for (UINTN i = first + cursor; i + clear < len; i++)
+ line[i] = line[i + clear];
+ len -= clear;
+ line[len] = '\0';
+ continue;
+
+ case KEYPRESS(0, SCAN_DELETE, 0):
+ case KEYPRESS(EFI_CONTROL_PRESSED, 0, 'd'):
+ case KEYPRESS(EFI_CONTROL_PRESSED, 0, CHAR_CTRL('d')):
+ if (len == 0)
+ continue;
+ if (first + cursor == len)
+ continue;
+ for (UINTN i = first + cursor; i < len; i++)
+ line[i] = line[i+1];
+ clear = 1;
+ len--;
+ continue;
+
+ case KEYPRESS(EFI_CONTROL_PRESSED, 0, 'k'):
+ case KEYPRESS(EFI_CONTROL_PRESSED, 0, CHAR_CTRL('k')):
+ /* kill-line */
+ line[first + cursor] = '\0';
+ clear = len - (first + cursor);
+ len = first + cursor;
+ continue;
+
+ case KEYPRESS(0, 0, CHAR_LINEFEED):
+ case KEYPRESS(0, 0, CHAR_CARRIAGE_RETURN):
+ case KEYPRESS(0, SCAN_F3, 0): /* EZpad Mini 4s firmware sends malformed events */
+ case KEYPRESS(0, SCAN_F3, CHAR_CARRIAGE_RETURN): /* Teclast X98+ II firmware sends malformed events */
+ if (!streq16(line, *line_in)) {
+ free(*line_in);
+ *line_in = TAKE_PTR(line);
+ }
+ return true;
+
+ case KEYPRESS(0, 0, CHAR_BACKSPACE):
+ if (len == 0)
+ continue;
+ if (first == 0 && cursor == 0)
+ continue;
+ for (UINTN i = first + cursor-1; i < len; i++)
+ line[i] = line[i+1];
+ clear = 1;
+ len--;
+ if (cursor > 0)
+ cursor--;
+ if (cursor > 0 || first == 0)
+ continue;
+ /* show full line if it fits */
+ if (len < x_max) {
+ cursor = first;
+ first = 0;
+ continue;
+ }
+ /* jump left to see what we delete */
+ if (first > 10) {
+ first -= 10;
+ cursor = 10;
+ } else {
+ cursor = first;
+ first = 0;
+ }
+ continue;
+
+ case KEYPRESS(0, 0, ' ') ... KEYPRESS(0, 0, '~'):
+ case KEYPRESS(0, 0, 0x80) ... KEYPRESS(0, 0, 0xffff):
+ if (len+1 == size)
+ continue;
+ for (UINTN i = len; i > first + cursor; i--)
+ line[i] = line[i-1];
+ line[first + cursor] = KEYCHAR(key);
+ len++;
+ line[len] = '\0';
+ if (cursor+1 < x_max)
+ cursor++;
+ else if (first + cursor < len)
+ first++;
+ continue;
+ }
+ }
+}
+
+static UINTN entry_lookup_key(Config *config, UINTN start, char16_t key) {
+ assert(config);
+
+ if (key == 0)
+ return IDX_INVALID;
+
+ /* select entry by number key */
+ if (key >= '1' && key <= '9') {
+ UINTN i = key - '0';
+ if (i > config->entry_count)
+ i = config->entry_count;
+ return i-1;
+ }
+
+ /* find matching key in config entries */
+ for (UINTN i = start; i < config->entry_count; i++)
+ if (config->entries[i]->key == key)
+ return i;
+
+ for (UINTN i = 0; i < start; i++)
+ if (config->entries[i]->key == key)
+ return i;
+
+ return IDX_INVALID;
+}
+
+static char16_t *update_timeout_efivar(uint32_t *t, bool inc) {
+ assert(t);
+
+ switch (*t) {
+ case TIMEOUT_MAX:
+ *t = inc ? TIMEOUT_MAX : (*t - 1);
+ break;
+ case TIMEOUT_UNSET:
+ *t = inc ? TIMEOUT_MENU_FORCE : TIMEOUT_UNSET;
+ break;
+ case TIMEOUT_MENU_FORCE:
+ *t = inc ? TIMEOUT_MENU_HIDDEN : TIMEOUT_UNSET;
+ break;
+ case TIMEOUT_MENU_HIDDEN:
+ *t = inc ? TIMEOUT_MIN : TIMEOUT_MENU_FORCE;
+ break;
+ default:
+ *t += inc ? 1 : -1;
+ }
+
+ switch (*t) {
+ case TIMEOUT_UNSET:
+ return xstrdup16(u"Menu timeout defined by configuration file.");
+ case TIMEOUT_MENU_FORCE:
+ return xstrdup16(u"Timeout disabled, menu will always be shown.");
+ case TIMEOUT_MENU_HIDDEN:
+ return xstrdup16(u"Menu disabled. Hold down key at bootup to show menu.");
+ default:
+ return xpool_print(L"Menu timeout set to %u s.", *t);
+ }
+}
+
+static bool unicode_supported(void) {
+ static int cache = -1;
+
+ if (cache < 0)
+ /* Basic unicode box drawing support is mandated by the spec, but it does
+ * not hurt to make sure it works. */
+ cache = ST->ConOut->TestString(ST->ConOut, (char16_t *) L"─") == EFI_SUCCESS;
+
+ return cache;
+}
+
+static void ps_string(const char16_t *fmt, const void *value) {
+ assert(fmt);
+ if (value)
+ Print(fmt, value);
+}
+
+static void ps_bool(const char16_t *fmt, bool value) {
+ assert(fmt);
+ Print(fmt, yes_no(value));
+}
+
+static bool ps_continue(void) {
+ if (unicode_supported())
+ Print(L"\n─── Press any key to continue, ESC or q to quit. ───\n\n");
+ else
+ Print(L"\n--- Press any key to continue, ESC or q to quit. ---\n\n");
+
+ uint64_t key;
+ return console_key_read(&key, UINT64_MAX) == EFI_SUCCESS &&
+ !IN_SET(key, KEYPRESS(0, SCAN_ESC, 0), KEYPRESS(0, 0, 'q'), KEYPRESS(0, 0, 'Q'));
+}
+
+static void print_status(Config *config, char16_t *loaded_image_path) {
+ UINTN x_max, y_max;
+ uint32_t screen_width = 0, screen_height = 0;
+ SecureBootMode secure;
+ _cleanup_free_ char16_t *device_part_uuid = NULL;
+
+ assert(config);
+
+ clear_screen(COLOR_NORMAL);
+ console_query_mode(&x_max, &y_max);
+ query_screen_resolution(&screen_width, &screen_height);
+
+ secure = secure_boot_mode();
+ (void) efivar_get(LOADER_GUID, L"LoaderDevicePartUUID", &device_part_uuid);
+
+ /* We employ some unusual indentation here for readability. */
+
+ ps_string(L" systemd-boot version: %a\n", GIT_VERSION);
+ ps_string(L" loaded image: %s\n", loaded_image_path);
+ ps_string(L" loader partition UUID: %s\n", device_part_uuid);
+ ps_string(L" architecture: %a\n", EFI_MACHINE_TYPE_NAME);
+ Print(L" UEFI specification: %u.%02u\n", ST->Hdr.Revision >> 16, ST->Hdr.Revision & 0xffff);
+ ps_string(L" firmware vendor: %s\n", ST->FirmwareVendor);
+ Print(L" firmware version: %u.%02u\n", ST->FirmwareRevision >> 16, ST->FirmwareRevision & 0xffff);
+ Print(L" OS indications: %lu\n", get_os_indications_supported());
+ Print(L" secure boot: %s (%s)\n", yes_no(IN_SET(secure, SECURE_BOOT_USER, SECURE_BOOT_DEPLOYED)), secure_boot_mode_to_string(secure));
+ ps_bool(L" shim: %s\n", shim_loaded());
+ ps_bool(L" TPM: %s\n", tpm_present());
+ Print(L" console mode: %d/%ld (%" PRIuN L"x%" PRIuN L" @%ux%u)\n", ST->ConOut->Mode->Mode, ST->ConOut->Mode->MaxMode - INT64_C(1), x_max, y_max, screen_width, screen_height);
+
+ if (!ps_continue())
+ return;
+
+ switch (config->timeout_sec_config) {
+ case TIMEOUT_UNSET:
+ break;
+ case TIMEOUT_MENU_FORCE:
+ Print(L" timeout (config): menu-force\n"); break;
+ case TIMEOUT_MENU_HIDDEN:
+ Print(L" timeout (config): menu-hidden\n"); break;
+ default:
+ Print(L" timeout (config): %u s\n", config->timeout_sec_config);
+ }
+
+ switch (config->timeout_sec_efivar) {
+ case TIMEOUT_UNSET:
+ break;
+ case TIMEOUT_MENU_FORCE:
+ Print(L" timeout (EFI var): menu-force\n"); break;
+ case TIMEOUT_MENU_HIDDEN:
+ Print(L" timeout (EFI var): menu-hidden\n"); break;
+ default:
+ Print(L" timeout (EFI var): %u s\n", config->timeout_sec_efivar);
+ }
+
+ ps_string(L" default (config): %s\n", config->entry_default_config);
+ ps_string(L" default (EFI var): %s\n", config->entry_default_efivar);
+ ps_string(L" default (one-shot): %s\n", config->entry_oneshot);
+ ps_string(L" saved entry: %s\n", config->entry_saved);
+ ps_bool(L" editor: %s\n", config->editor);
+ ps_bool(L" auto-entries: %s\n", config->auto_entries);
+ ps_bool(L" auto-firmware: %s\n", config->auto_firmware);
+ ps_bool(L" beep: %s\n", config->beep);
+ ps_bool(L" reboot-for-bitlocker: %s\n", config->reboot_for_bitlocker);
+ ps_string(L" random-seed-mode: %s\n", random_seed_modes_table[config->random_seed_mode]);
+
+ switch (config->secure_boot_enroll) {
+ case ENROLL_OFF:
+ Print(L" secure-boot-enroll: off\n"); break;
+ case ENROLL_MANUAL:
+ Print(L" secure-boot-enroll: manual\n"); break;
+ case ENROLL_FORCE:
+ Print(L" secure-boot-enroll: force\n"); break;
+ default:
+ assert_not_reached();
+ }
+
+ switch (config->console_mode) {
+ case CONSOLE_MODE_AUTO:
+ Print(L" console-mode (config): %s\n", L"auto"); break;
+ case CONSOLE_MODE_KEEP:
+ Print(L" console-mode (config): %s\n", L"keep"); break;
+ case CONSOLE_MODE_FIRMWARE_MAX:
+ Print(L" console-mode (config): %s\n", L"max"); break;
+ default:
+ Print(L" console-mode (config): %ld\n", config->console_mode); break;
+ }
+
+ /* EFI var console mode is always a concrete value or unset. */
+ if (config->console_mode_efivar != CONSOLE_MODE_KEEP)
+ Print(L"console-mode (EFI var): %ld\n", config->console_mode_efivar);
+
+ if (!ps_continue())
+ return;
+
+ for (UINTN i = 0; i < config->entry_count; i++) {
+ ConfigEntry *entry = config->entries[i];
+
+ _cleanup_free_ char16_t *dp = NULL;
+ if (entry->device)
+ (void) device_path_to_str(DevicePathFromHandle(entry->device), &dp);
+
+ Print(L" config entry: %" PRIuN L"/%" PRIuN L"\n", i + 1, config->entry_count);
+ ps_string(L" id: %s\n", entry->id);
+ ps_string(L" title: %s\n", entry->title);
+ ps_string(L" title show: %s\n", streq16(entry->title, entry->title_show) ? NULL : entry->title_show);
+ ps_string(L" sort key: %s\n", entry->sort_key);
+ ps_string(L" version: %s\n", entry->version);
+ ps_string(L" machine-id: %s\n", entry->machine_id);
+ ps_string(L" device: %s\n", dp);
+ ps_string(L" loader: %s\n", entry->loader);
+ STRV_FOREACH(initrd, entry->initrd)
+ Print(L" initrd: %s\n", *initrd);
+ ps_string(L" devicetree: %s\n", entry->devicetree);
+ ps_string(L" options: %s\n", entry->options);
+ ps_bool(L" internal call: %s\n", !!entry->call);
+
+ ps_bool(L"counting boots: %s\n", entry->tries_left >= 0);
+ if (entry->tries_left >= 0) {
+ Print(L" tries: %u left, %u done\n", entry->tries_left, entry->tries_done);
+ Print(L" current path: %s\\%s\n", entry->path, entry->current_name);
+ Print(L" next path: %s\\%s\n", entry->path, entry->next_name);
+ }
+
+ if (!ps_continue())
+ return;
+ }
+}
+
+static EFI_STATUS reboot_into_firmware(void) {
+ uint64_t osind = 0;
+ EFI_STATUS err;
+
+ if (!FLAGS_SET(get_os_indications_supported(), EFI_OS_INDICATIONS_BOOT_TO_FW_UI))
+ return log_error_status_stall(EFI_UNSUPPORTED, L"Reboot to firmware interface not supported.");
+
+ (void) efivar_get_uint64_le(EFI_GLOBAL_GUID, L"OsIndications", &osind);
+ osind |= EFI_OS_INDICATIONS_BOOT_TO_FW_UI;
+
+ err = efivar_set_uint64_le(EFI_GLOBAL_GUID, L"OsIndications", osind, EFI_VARIABLE_NON_VOLATILE);
+ if (err != EFI_SUCCESS)
+ return log_error_status_stall(err, L"Error setting OsIndications: %r", err);
+
+ RT->ResetSystem(EfiResetCold, EFI_SUCCESS, 0, NULL);
+ assert_not_reached();
+}
+
+static bool menu_run(
+ Config *config,
+ ConfigEntry **chosen_entry,
+ char16_t *loaded_image_path) {
+
+ assert(config);
+ assert(chosen_entry);
+
+ EFI_STATUS err;
+ UINTN visible_max = 0;
+ UINTN idx_highlight = config->idx_default;
+ UINTN idx_highlight_prev = 0;
+ UINTN idx, idx_first = 0, idx_last = 0;
+ bool new_mode = true, clear = true;
+ bool refresh = true, highlight = false;
+ UINTN x_start = 0, y_start = 0, y_status = 0;
+ UINTN x_max, y_max;
+ _cleanup_(strv_freep) char16_t **lines = NULL;
+ _cleanup_free_ char16_t *clearline = NULL, *separator = NULL, *status = NULL;
+ uint32_t timeout_efivar_saved = config->timeout_sec_efivar;
+ uint32_t timeout_remain = config->timeout_sec == TIMEOUT_MENU_FORCE ? 0 : config->timeout_sec;
+ bool exit = false, run = true, firmware_setup = false;
+ int64_t console_mode_initial = ST->ConOut->Mode->Mode, console_mode_efivar_saved = config->console_mode_efivar;
+ UINTN default_efivar_saved = config->idx_default_efivar;
+
+ graphics_mode(false);
+ ST->ConIn->Reset(ST->ConIn, false);
+ ST->ConOut->EnableCursor(ST->ConOut, false);
+
+ /* draw a single character to make ClearScreen work on some firmware */
+ Print(L" ");
+
+ err = console_set_mode(config->console_mode_efivar != CONSOLE_MODE_KEEP ?
+ config->console_mode_efivar : config->console_mode);
+ if (err != EFI_SUCCESS) {
+ clear_screen(COLOR_NORMAL);
+ log_error_stall(L"Error switching console mode: %r", err);
+ }
+
+ UINTN line_width = 0, entry_padding = 3;
+ while (!exit) {
+ uint64_t key;
+
+ if (new_mode) {
+ console_query_mode(&x_max, &y_max);
+
+ /* account for padding+status */
+ visible_max = y_max - 2;
+
+ /* Drawing entries starts at idx_first until idx_last. We want to make
+ * sure that idx_highlight is centered, but not if we are close to the
+ * beginning/end of the entry list. Otherwise we would have a half-empty
+ * screen. */
+ if (config->entry_count <= visible_max || idx_highlight <= visible_max / 2)
+ idx_first = 0;
+ else if (idx_highlight >= config->entry_count - (visible_max / 2))
+ idx_first = config->entry_count - visible_max;
+ else
+ idx_first = idx_highlight - (visible_max / 2);
+ idx_last = idx_first + visible_max - 1;
+
+ /* length of the longest entry */
+ line_width = 0;
+ for (UINTN i = 0; i < config->entry_count; i++)
+ line_width = MAX(line_width, strlen16(config->entries[i]->title_show));
+ line_width = MIN(line_width + 2 * entry_padding, x_max);
+
+ /* offsets to center the entries on the screen */
+ x_start = (x_max - (line_width)) / 2;
+ if (config->entry_count < visible_max)
+ y_start = ((visible_max - config->entry_count) / 2) + 1;
+ else
+ y_start = 0;
+
+ /* Put status line after the entry list, but give it some breathing room. */
+ y_status = MIN(y_start + MIN(visible_max, config->entry_count) + 1, y_max - 1);
+
+ lines = strv_free(lines);
+ clearline = mfree(clearline);
+ separator = mfree(separator);
+
+ /* menu entries title lines */
+ lines = xnew(char16_t *, config->entry_count + 1);
+
+ for (UINTN i = 0; i < config->entry_count; i++) {
+ UINTN j, padding;
+
+ lines[i] = xnew(char16_t, line_width + 1);
+ padding = (line_width - MIN(strlen16(config->entries[i]->title_show), line_width)) / 2;
+
+ for (j = 0; j < padding; j++)
+ lines[i][j] = ' ';
+
+ for (UINTN k = 0; config->entries[i]->title_show[k] != '\0' && j < line_width; j++, k++)
+ lines[i][j] = config->entries[i]->title_show[k];
+
+ for (; j < line_width; j++)
+ lines[i][j] = ' ';
+ lines[i][line_width] = '\0';
+ }
+ lines[config->entry_count] = NULL;
+
+ clearline = xnew(char16_t, x_max + 1);
+ separator = xnew(char16_t, x_max + 1);
+ for (UINTN i = 0; i < x_max; i++) {
+ clearline[i] = ' ';
+ separator[i] = unicode_supported() ? L'─' : L'-';
+ }
+ clearline[x_max] = 0;
+ separator[x_max] = 0;
+
+ new_mode = false;
+ clear = true;
+ }
+
+ if (clear) {
+ clear_screen(COLOR_NORMAL);
+ clear = false;
+ refresh = true;
+ }
+
+ if (refresh) {
+ for (UINTN i = idx_first; i <= idx_last && i < config->entry_count; i++) {
+ print_at(x_start, y_start + i - idx_first,
+ i == idx_highlight ? COLOR_HIGHLIGHT : COLOR_ENTRY,
+ lines[i]);
+ if (i == config->idx_default_efivar)
+ print_at(x_start,
+ y_start + i - idx_first,
+ i == idx_highlight ? COLOR_HIGHLIGHT : COLOR_ENTRY,
+ unicode_supported() ? L" ►" : L"=>");
+ }
+ refresh = false;
+ } else if (highlight) {
+ print_at(x_start, y_start + idx_highlight_prev - idx_first, COLOR_ENTRY, lines[idx_highlight_prev]);
+ print_at(x_start, y_start + idx_highlight - idx_first, COLOR_HIGHLIGHT, lines[idx_highlight]);
+ if (idx_highlight_prev == config->idx_default_efivar)
+ print_at(x_start,
+ y_start + idx_highlight_prev - idx_first,
+ COLOR_ENTRY,
+ unicode_supported() ? L" ►" : L"=>");
+ if (idx_highlight == config->idx_default_efivar)
+ print_at(x_start,
+ y_start + idx_highlight - idx_first,
+ COLOR_HIGHLIGHT,
+ unicode_supported() ? L" ►" : L"=>");
+ highlight = false;
+ }
+
+ if (timeout_remain > 0) {
+ free(status);
+ status = xpool_print(L"Boot in %u s.", timeout_remain);
+ }
+
+ if (status) {
+ /* If we draw the last char of the last line, the screen will scroll and break our
+ * input. Therefore, draw one less character then we could for the status message.
+ * Note that the same does not apply for the separator line as it will never be drawn
+ * on the last line. */
+ UINTN len = strnlen16(status, x_max - 1);
+ UINTN x = (x_max - len) / 2;
+ status[len] = '\0';
+ print_at(0, y_status, COLOR_NORMAL, clearline + x_max - x);
+ ST->ConOut->OutputString(ST->ConOut, status);
+ ST->ConOut->OutputString(ST->ConOut, clearline + 1 + x + len);
+
+ len = MIN(MAX(len, line_width) + 2 * entry_padding, x_max);
+ x = (x_max - len) / 2;
+ print_at(x, y_status - 1, COLOR_NORMAL, separator + x_max - len);
+ } else {
+ print_at(0, y_status - 1, COLOR_NORMAL, clearline);
+ print_at(0, y_status, COLOR_NORMAL, clearline + 1); /* See comment above. */
+ }
+
+ /* Beep several times so that the selected entry can be distinguished. */
+ if (config->beep)
+ beep(idx_highlight + 1);
+
+ err = console_key_read(&key, timeout_remain > 0 ? 1000 * 1000 : UINT64_MAX);
+ if (err == EFI_NOT_READY)
+ /* No input device returned a key, try again. This
+ * normally should not happen. */
+ continue;
+ if (err == EFI_TIMEOUT) {
+ assert(timeout_remain > 0);
+ timeout_remain--;
+ if (timeout_remain == 0) {
+ exit = true;
+ break;
+ }
+
+ /* update status */
+ continue;
+ }
+ if (err != EFI_SUCCESS) {
+ exit = true;
+ break;
+ }
+
+ timeout_remain = 0;
+
+ /* clear status after keystroke */
+ status = mfree(status);
+
+ idx_highlight_prev = idx_highlight;
+
+ if (firmware_setup) {
+ firmware_setup = false;
+ if (key == KEYPRESS(0, 0, CHAR_CARRIAGE_RETURN))
+ reboot_into_firmware();
+ continue;
+ }
+
+ switch (key) {
+ case KEYPRESS(0, SCAN_UP, 0):
+ case KEYPRESS(0, 0, 'k'):
+ case KEYPRESS(0, 0, 'K'):
+ if (idx_highlight > 0)
+ idx_highlight--;
+ break;
+
+ case KEYPRESS(0, SCAN_DOWN, 0):
+ case KEYPRESS(0, 0, 'j'):
+ case KEYPRESS(0, 0, 'J'):
+ if (idx_highlight < config->entry_count-1)
+ idx_highlight++;
+ break;
+
+ case KEYPRESS(0, SCAN_HOME, 0):
+ case KEYPRESS(EFI_ALT_PRESSED, 0, '<'):
+ if (idx_highlight > 0) {
+ refresh = true;
+ idx_highlight = 0;
+ }
+ break;
+
+ case KEYPRESS(0, SCAN_END, 0):
+ case KEYPRESS(EFI_ALT_PRESSED, 0, '>'):
+ if (idx_highlight < config->entry_count-1) {
+ refresh = true;
+ idx_highlight = config->entry_count-1;
+ }
+ break;
+
+ case KEYPRESS(0, SCAN_PAGE_UP, 0):
+ if (idx_highlight > visible_max)
+ idx_highlight -= visible_max;
+ else
+ idx_highlight = 0;
+ break;
+
+ case KEYPRESS(0, SCAN_PAGE_DOWN, 0):
+ idx_highlight += visible_max;
+ if (idx_highlight > config->entry_count-1)
+ idx_highlight = config->entry_count-1;
+ break;
+
+ case KEYPRESS(0, 0, CHAR_LINEFEED):
+ case KEYPRESS(0, 0, CHAR_CARRIAGE_RETURN):
+ case KEYPRESS(0, SCAN_F3, 0): /* EZpad Mini 4s firmware sends malformed events */
+ case KEYPRESS(0, SCAN_F3, CHAR_CARRIAGE_RETURN): /* Teclast X98+ II firmware sends malformed events */
+ case KEYPRESS(0, SCAN_RIGHT, 0):
+ exit = true;
+ break;
+
+ case KEYPRESS(0, SCAN_F1, 0):
+ case KEYPRESS(0, 0, 'h'):
+ case KEYPRESS(0, 0, 'H'):
+ case KEYPRESS(0, 0, '?'):
+ /* This must stay below 80 characters! Q/v/Ctrl+l/f deliberately not advertised. */
+ status = xstrdup16(u"(d)efault (t/T)timeout (e)dit (r/R)resolution (p)rint (h)elp");
+ break;
+
+ case KEYPRESS(0, 0, 'Q'):
+ exit = true;
+ run = false;
+ break;
+
+ case KEYPRESS(0, 0, 'd'):
+ case KEYPRESS(0, 0, 'D'):
+ if (config->idx_default_efivar != idx_highlight) {
+ free(config->entry_default_efivar);
+ config->entry_default_efivar = xstrdup16(config->entries[idx_highlight]->id);
+ config->idx_default_efivar = idx_highlight;
+ status = xstrdup16(u"Default boot entry selected.");
+ } else {
+ config->entry_default_efivar = mfree(config->entry_default_efivar);
+ config->idx_default_efivar = IDX_INVALID;
+ status = xstrdup16(u"Default boot entry cleared.");
+ }
+ config->use_saved_entry_efivar = false;
+ refresh = true;
+ break;
+
+ case KEYPRESS(0, 0, '-'):
+ case KEYPRESS(0, 0, 'T'):
+ status = update_timeout_efivar(&config->timeout_sec_efivar, false);
+ break;
+
+ case KEYPRESS(0, 0, '+'):
+ case KEYPRESS(0, 0, 't'):
+ status = update_timeout_efivar(&config->timeout_sec_efivar, true);
+ break;
+
+ case KEYPRESS(0, 0, 'e'):
+ case KEYPRESS(0, 0, 'E'):
+ /* only the options of configured entries can be edited */
+ if (!config->editor ||
+ !IN_SET(config->entries[idx_highlight]->type, LOADER_EFI, LOADER_LINUX, LOADER_UNIFIED_LINUX)) {
+ status = xstrdup16(u"Entry does not support editing the command line.");
+ break;
+ }
+
+ /* Unified kernels that are signed as a whole will not accept command line options
+ * when secure boot is enabled unless there is none embedded in the image. Do not try
+ * to pretend we can edit it to only have it be ignored. */
+ if (config->entries[idx_highlight]->type == LOADER_UNIFIED_LINUX &&
+ secure_boot_enabled() &&
+ config->entries[idx_highlight]->options) {
+ status = xstrdup16(u"Entry not editable in SecureBoot mode.");
+ break;
+ }
+
+ /* The edit line may end up on the last line of the screen. And even though we're
+ * not telling the firmware to advance the line, it still does in this one case,
+ * causing a scroll to happen that screws with our beautiful boot loader output.
+ * Since we cannot paint the last character of the edit line, we simply start
+ * at x-offset 1 for symmetry. */
+ print_at(1, y_status, COLOR_EDIT, clearline + 2);
+ exit = line_edit(&config->entries[idx_highlight]->options, x_max - 2, y_status);
+ print_at(1, y_status, COLOR_NORMAL, clearline + 2);
+ break;
+
+ case KEYPRESS(0, 0, 'v'):
+ status = xpool_print(
+ L"systemd-boot " GIT_VERSION L" (" EFI_MACHINE_TYPE_NAME L"), "
+ L"UEFI Specification %u.%02u, Vendor %s %u.%02u",
+ ST->Hdr.Revision >> 16,
+ ST->Hdr.Revision & 0xffff,
+ ST->FirmwareVendor,
+ ST->FirmwareRevision >> 16,
+ ST->FirmwareRevision & 0xffff);
+ break;
+
+ case KEYPRESS(0, 0, 'p'):
+ case KEYPRESS(0, 0, 'P'):
+ print_status(config, loaded_image_path);
+ clear = true;
+ break;
+
+ case KEYPRESS(EFI_CONTROL_PRESSED, 0, 'l'):
+ case KEYPRESS(EFI_CONTROL_PRESSED, 0, CHAR_CTRL('l')):
+ clear = true;
+ break;
+
+ case KEYPRESS(0, 0, 'r'):
+ err = console_set_mode(CONSOLE_MODE_NEXT);
+ if (err != EFI_SUCCESS)
+ status = xpool_print(L"Error changing console mode: %r", err);
+ else {
+ config->console_mode_efivar = ST->ConOut->Mode->Mode;
+ status = xpool_print(L"Console mode changed to %ld.", config->console_mode_efivar);
+ }
+ new_mode = true;
+ break;
+
+ case KEYPRESS(0, 0, 'R'):
+ config->console_mode_efivar = CONSOLE_MODE_KEEP;
+ err = console_set_mode(config->console_mode == CONSOLE_MODE_KEEP ?
+ console_mode_initial : config->console_mode);
+ if (err != EFI_SUCCESS)
+ status = xpool_print(L"Error resetting console mode: %r", err);
+ else
+ status = xpool_print(L"Console mode reset to %s default.",
+ config->console_mode == CONSOLE_MODE_KEEP ? L"firmware" : L"configuration file");
+ new_mode = true;
+ break;
+
+ case KEYPRESS(0, 0, 'f'):
+ case KEYPRESS(0, 0, 'F'):
+ case KEYPRESS(0, SCAN_F2, 0): /* Most vendors. */
+ case KEYPRESS(0, SCAN_F10, 0): /* HP and Lenovo. */
+ case KEYPRESS(0, SCAN_DELETE, 0): /* Same as F2. */
+ case KEYPRESS(0, SCAN_ESC, 0): /* HP. */
+ if (FLAGS_SET(get_os_indications_supported(), EFI_OS_INDICATIONS_BOOT_TO_FW_UI)) {
+ firmware_setup = true;
+ /* Let's make sure the user really wants to do this. */
+ status = xpool_print(L"Press Enter to reboot into firmware interface.");
+ } else
+ status = xpool_print(L"Reboot into firmware interface not supported.");
+ break;
+
+ default:
+ /* jump with a hotkey directly to a matching entry */
+ idx = entry_lookup_key(config, idx_highlight+1, KEYCHAR(key));
+ if (idx == IDX_INVALID)
+ break;
+ idx_highlight = idx;
+ refresh = true;
+ }
+
+ if (idx_highlight > idx_last) {
+ idx_last = idx_highlight;
+ idx_first = 1 + idx_highlight - visible_max;
+ refresh = true;
+ } else if (idx_highlight < idx_first) {
+ idx_first = idx_highlight;
+ idx_last = idx_highlight + visible_max-1;
+ refresh = true;
+ }
+
+ if (!refresh && idx_highlight != idx_highlight_prev)
+ highlight = true;
+ }
+
+ *chosen_entry = config->entries[idx_highlight];
+
+ /* Update EFI vars after we left the menu to reduce NVRAM writes. */
+
+ if (default_efivar_saved != config->idx_default_efivar)
+ efivar_set(LOADER_GUID, L"LoaderEntryDefault", config->entry_default_efivar, EFI_VARIABLE_NON_VOLATILE);
+
+ if (console_mode_efivar_saved != config->console_mode_efivar) {
+ if (config->console_mode_efivar == CONSOLE_MODE_KEEP)
+ efivar_set(LOADER_GUID, L"LoaderConfigConsoleMode", NULL, EFI_VARIABLE_NON_VOLATILE);
+ else
+ efivar_set_uint_string(LOADER_GUID, L"LoaderConfigConsoleMode",
+ config->console_mode_efivar, EFI_VARIABLE_NON_VOLATILE);
+ }
+
+ if (timeout_efivar_saved != config->timeout_sec_efivar) {
+ switch (config->timeout_sec_efivar) {
+ case TIMEOUT_UNSET:
+ efivar_set(LOADER_GUID, L"LoaderConfigTimeout", NULL, EFI_VARIABLE_NON_VOLATILE);
+ break;
+ case TIMEOUT_MENU_FORCE:
+ efivar_set(LOADER_GUID, u"LoaderConfigTimeout", u"menu-force", EFI_VARIABLE_NON_VOLATILE);
+ break;
+ case TIMEOUT_MENU_HIDDEN:
+ efivar_set(LOADER_GUID, u"LoaderConfigTimeout", u"menu-hidden", EFI_VARIABLE_NON_VOLATILE);
+ break;
+ default:
+ efivar_set_uint_string(LOADER_GUID, L"LoaderConfigTimeout",
+ config->timeout_sec_efivar, EFI_VARIABLE_NON_VOLATILE);
+ }
+ }
+
+ clear_screen(COLOR_NORMAL);
+ return run;
+}
+
+static void config_add_entry(Config *config, ConfigEntry *entry) {
+ assert(config);
+ assert(entry);
+
+ /* This is just for paranoia. */
+ assert(config->entry_count < IDX_MAX);
+
+ if ((config->entry_count & 15) == 0) {
+ config->entries = xrealloc(
+ config->entries,
+ sizeof(void *) * config->entry_count,
+ sizeof(void *) * (config->entry_count + 16));
+ }
+ config->entries[config->entry_count++] = entry;
+}
+
+static void config_entry_free(ConfigEntry *entry) {
+ if (!entry)
+ return;
+
+ free(entry->id);
+ free(entry->title_show);
+ free(entry->title);
+ free(entry->sort_key);
+ free(entry->version);
+ free(entry->machine_id);
+ free(entry->loader);
+ free(entry->devicetree);
+ free(entry->options);
+ strv_free(entry->initrd);
+ free(entry->path);
+ free(entry->current_name);
+ free(entry->next_name);
+ free(entry);
+}
+
+static inline void config_entry_freep(ConfigEntry **entry) {
+ config_entry_free(*entry);
+}
+
+static char *line_get_key_value(
+ char *content,
+ const char *sep,
+ UINTN *pos,
+ char **key_ret,
+ char **value_ret) {
+
+ char *line, *value;
+ UINTN linelen;
+
+ assert(content);
+ assert(sep);
+ assert(pos);
+ assert(key_ret);
+ assert(value_ret);
+
+ for (;;) {
+ line = content + *pos;
+ if (*line == '\0')
+ return NULL;
+
+ linelen = 0;
+ while (line[linelen] && !strchr8("\n\r", line[linelen]))
+ linelen++;
+
+ /* move pos to next line */
+ *pos += linelen;
+ if (content[*pos])
+ (*pos)++;
+
+ /* empty line */
+ if (linelen == 0)
+ continue;
+
+ /* terminate line */
+ line[linelen] = '\0';
+
+ /* remove leading whitespace */
+ while (linelen > 0 && strchr8(" \t", *line)) {
+ line++;
+ linelen--;
+ }
+
+ /* remove trailing whitespace */
+ while (linelen > 0 && strchr8(" \t", line[linelen - 1]))
+ linelen--;
+ line[linelen] = '\0';
+
+ if (*line == '#')
+ continue;
+
+ /* split key/value */
+ value = line;
+ while (*value && !strchr8(sep, *value))
+ value++;
+ if (*value == '\0')
+ continue;
+ *value = '\0';
+ value++;
+ while (*value && strchr8(sep, *value))
+ value++;
+
+ /* unquote */
+ if (value[0] == '"' && line[linelen - 1] == '"') {
+ value++;
+ line[linelen - 1] = '\0';
+ }
+
+ *key_ret = line;
+ *value_ret = value;
+ return line;
+ }
+}
+
+static void config_defaults_load_from_file(Config *config, char *content) {
+ char *line;
+ UINTN pos = 0;
+ char *key, *value;
+ EFI_STATUS err;
+
+ assert(config);
+ assert(content);
+
+ while ((line = line_get_key_value(content, " \t", &pos, &key, &value))) {
+ if (streq8(key, "timeout")) {
+ if (streq8( value, "menu-force"))
+ config->timeout_sec_config = TIMEOUT_MENU_FORCE;
+ else if (streq8(value, "menu-hidden"))
+ config->timeout_sec_config = TIMEOUT_MENU_HIDDEN;
+ else {
+ uint64_t u;
+ if (!parse_number8(value, &u, NULL) || u > TIMEOUT_TYPE_MAX) {
+ log_error_stall(L"Error parsing 'timeout' config option: %a", value);
+ continue;
+ }
+ config->timeout_sec_config = u;
+ }
+ config->timeout_sec = config->timeout_sec_config;
+ continue;
+ }
+
+ if (streq8(key, "default")) {
+ if (value[0] == '@' && !strcaseeq8(value, "@saved")) {
+ log_error_stall(L"Unsupported special entry identifier: %a", value);
+ continue;
+ }
+ free(config->entry_default_config);
+ config->entry_default_config = xstr8_to_16(value);
+ continue;
+ }
+
+ if (streq8(key, "editor")) {
+ err = parse_boolean(value, &config->editor);
+ if (err != EFI_SUCCESS)
+ log_error_stall(L"Error parsing 'editor' config option: %a", value);
+ continue;
+ }
+
+ if (streq8(key, "auto-entries")) {
+ err = parse_boolean(value, &config->auto_entries);
+ if (err != EFI_SUCCESS)
+ log_error_stall(L"Error parsing 'auto-entries' config option: %a", value);
+ continue;
+ }
+
+ if (streq8(key, "auto-firmware")) {
+ err = parse_boolean(value, &config->auto_firmware);
+ if (err != EFI_SUCCESS)
+ log_error_stall(L"Error parsing 'auto-firmware' config option: %a", value);
+ continue;
+ }
+
+ if (streq8(key, "beep")) {
+ err = parse_boolean(value, &config->beep);
+ if (err != EFI_SUCCESS)
+ log_error_stall(L"Error parsing 'beep' config option: %a", value);
+ continue;
+ }
+
+ if (streq8(key, "reboot-for-bitlocker")) {
+ err = parse_boolean(value, &config->reboot_for_bitlocker);
+ if (err != EFI_SUCCESS)
+ log_error_stall(L"Error parsing 'reboot-for-bitlocker' config option: %a", value);
+ }
+
+ if (streq8(key, "secure-boot-enroll")) {
+ if (streq8(value, "manual"))
+ config->secure_boot_enroll = ENROLL_MANUAL;
+ else if (streq8(value, "force"))
+ config->secure_boot_enroll = ENROLL_FORCE;
+ else if (streq8(value, "off"))
+ config->secure_boot_enroll = ENROLL_OFF;
+ else
+ log_error_stall(L"Error parsing 'secure-boot-enroll' config option: %a", value);
+ continue;
+ }
+
+ if (streq8(key, "console-mode")) {
+ if (streq8(value, "auto"))
+ config->console_mode = CONSOLE_MODE_AUTO;
+ else if (streq8(value, "max"))
+ config->console_mode = CONSOLE_MODE_FIRMWARE_MAX;
+ else if (streq8(value, "keep"))
+ config->console_mode = CONSOLE_MODE_KEEP;
+ else {
+ uint64_t u;
+ if (!parse_number8(value, &u, NULL) || u > CONSOLE_MODE_RANGE_MAX) {
+ log_error_stall(L"Error parsing 'console-mode' config option: %a", value);
+ continue;
+ }
+ config->console_mode = u;
+ }
+ continue;
+ }
+
+ if (streq8(key, "random-seed-mode")) {
+ if (streq8(value, "off"))
+ config->random_seed_mode = RANDOM_SEED_OFF;
+ else if (streq8(value, "with-system-token"))
+ config->random_seed_mode = RANDOM_SEED_WITH_SYSTEM_TOKEN;
+ else if (streq8(value, "always"))
+ config->random_seed_mode = RANDOM_SEED_ALWAYS;
+ else {
+ bool on;
+
+ err = parse_boolean(value, &on);
+ if (err != EFI_SUCCESS) {
+ log_error_stall(L"Error parsing 'random-seed-mode' config option: %a", value);
+ continue;
+ }
+
+ config->random_seed_mode = on ? RANDOM_SEED_ALWAYS : RANDOM_SEED_OFF;
+ }
+ continue;
+ }
+ }
+}
+
+static void config_entry_parse_tries(
+ ConfigEntry *entry,
+ const char16_t *path,
+ const char16_t *file,
+ const char16_t *suffix) {
+
+ assert(entry);
+ assert(path);
+ assert(file);
+ assert(suffix);
+
+ /*
+ * Parses a suffix of two counters (one going down, one going up) in the form "+LEFT-DONE" from the end of the
+ * filename (but before the .efi/.conf suffix), where the "-DONE" part is optional and may be left out (in
+ * which case that counter as assumed to be zero, i.e. the missing part is synonymous to "-0").
+ *
+ * Names we grok, and the series they result in:
+ *
+ * foobar+3.efi → foobar+2-1.efi → foobar+1-2.efi → foobar+0-3.efi → STOP!
+ * foobar+4-0.efi → foobar+3-1.efi → foobar+2-2.efi → foobar+1-3.efi → foobar+0-4.efi → STOP!
+ */
+
+ const char16_t *counter = NULL;
+ for (;;) {
+ char16_t *plus = strchr16(counter ?: file, '+');
+ if (plus) {
+ /* We want the last "+". */
+ counter = plus + 1;
+ continue;
+ }
+ if (counter)
+ break;
+
+ /* No boot counter found. */
+ return;
+ }
+
+ uint64_t tries_left, tries_done = 0;
+ size_t prefix_len = counter - file;
+
+ if (!parse_number16(counter, &tries_left, &counter) || tries_left > INT_MAX)
+ return;
+
+ /* Parse done counter only if present. */
+ if (*counter == '-' && (!parse_number16(counter + 1, &tries_done, &counter) || tries_done > INT_MAX))
+ return;
+
+ /* Boot counter in the middle of the name? */
+ if (!streq16(counter, suffix))
+ return;
+
+ entry->tries_left = tries_left;
+ entry->tries_done = tries_done;
+ entry->path = xstrdup16(path);
+ entry->current_name = xstrdup16(file);
+ entry->next_name = xpool_print(
+ L"%.*s%u-%u%s",
+ prefix_len,
+ file,
+ LESS_BY(tries_left, 1u),
+ MIN(tries_done + 1, (uint64_t) INT_MAX),
+ suffix);
+}
+
+static EFI_STATUS config_entry_bump_counters(ConfigEntry *entry) {
+ _cleanup_free_ char16_t* old_path = NULL, *new_path = NULL;
+ _cleanup_(file_closep) EFI_FILE *handle = NULL;
+ _cleanup_free_ EFI_FILE_INFO *file_info = NULL;
+ UINTN file_info_size;
+ EFI_STATUS err;
+
+ assert(entry);
+
+ if (entry->tries_left < 0)
+ return EFI_SUCCESS;
+
+ if (!entry->path || !entry->current_name || !entry->next_name)
+ return EFI_SUCCESS;
+
+ _cleanup_(file_closep) EFI_FILE *root = NULL;
+ err = open_volume(entry->device, &root);
+ if (err != EFI_SUCCESS) {
+ log_error_stall(L"Error opening entry root path: %r", err);
+ return err;
+ }
+
+ old_path = xpool_print(L"%s\\%s", entry->path, entry->current_name);
+
+ err = root->Open(root, &handle, old_path, EFI_FILE_MODE_READ|EFI_FILE_MODE_WRITE, 0ULL);
+ if (err != EFI_SUCCESS) {
+ log_error_stall(L"Error opening boot entry: %r", err);
+ return err;
+ }
+
+ err = get_file_info_harder(handle, &file_info, &file_info_size);
+ if (err != EFI_SUCCESS) {
+ log_error_stall(L"Error getting boot entry file info: %r", err);
+ return err;
+ }
+
+ /* And rename the file */
+ strcpy16(file_info->FileName, entry->next_name);
+ err = handle->SetInfo(handle, &GenericFileInfo, file_info_size, file_info);
+ if (err != EFI_SUCCESS) {
+ log_error_stall(L"Failed to rename '%s' to '%s', ignoring: %r", old_path, entry->next_name, err);
+ return err;
+ }
+
+ /* Flush everything to disk, just in case… */
+ err = handle->Flush(handle);
+ if (err != EFI_SUCCESS) {
+ log_error_stall(L"Error flushing boot entry file info: %r", err);
+ return err;
+ }
+
+ /* Let's tell the OS that we renamed this file, so that it knows what to rename to the counter-less name on
+ * success */
+ new_path = xpool_print(L"%s\\%s", entry->path, entry->next_name);
+ efivar_set(LOADER_GUID, L"LoaderBootCountPath", new_path, 0);
+
+ /* If the file we just renamed is the loader path, then let's update that. */
+ if (streq16(entry->loader, old_path)) {
+ free(entry->loader);
+ entry->loader = TAKE_PTR(new_path);
+ }
+
+ return EFI_SUCCESS;
+}
+
+static void config_entry_add_type1(
+ Config *config,
+ EFI_HANDLE *device,
+ EFI_FILE *root_dir,
+ const char16_t *path,
+ const char16_t *file,
+ char *content,
+ const char16_t *loaded_image_path) {
+
+ _cleanup_(config_entry_freep) ConfigEntry *entry = NULL;
+ char *line;
+ UINTN pos = 0, n_initrd = 0;
+ char *key, *value;
+ EFI_STATUS err;
+
+ assert(config);
+ assert(device);
+ assert(root_dir);
+ assert(path);
+ assert(file);
+ assert(content);
+
+ entry = xnew(ConfigEntry, 1);
+ *entry = (ConfigEntry) {
+ .tries_done = -1,
+ .tries_left = -1,
+ };
+
+ while ((line = line_get_key_value(content, " \t", &pos, &key, &value))) {
+ if (streq8(key, "title")) {
+ free(entry->title);
+ entry->title = xstr8_to_16(value);
+ continue;
+ }
+
+ if (streq8(key, "sort-key")) {
+ free(entry->sort_key);
+ entry->sort_key = xstr8_to_16(value);
+ continue;
+ }
+
+ if (streq8(key, "version")) {
+ free(entry->version);
+ entry->version = xstr8_to_16(value);
+ continue;
+ }
+
+ if (streq8(key, "machine-id")) {
+ free(entry->machine_id);
+ entry->machine_id = xstr8_to_16(value);
+ continue;
+ }
+
+ if (streq8(key, "linux")) {
+ free(entry->loader);
+ entry->type = LOADER_LINUX;
+ entry->loader = xstr8_to_path(value);
+ entry->key = 'l';
+ continue;
+ }
+
+ if (streq8(key, "efi")) {
+ entry->type = LOADER_EFI;
+ free(entry->loader);
+ entry->loader = xstr8_to_path(value);
+
+ /* do not add an entry for ourselves */
+ if (strcaseeq16(entry->loader, loaded_image_path)) {
+ entry->type = LOADER_UNDEFINED;
+ break;
+ }
+ continue;
+ }
+
+ if (streq8(key, "architecture")) {
+ /* do not add an entry for an EFI image of architecture not matching with that of the image */
+ if (!streq8(value, EFI_MACHINE_TYPE_NAME)) {
+ entry->type = LOADER_UNDEFINED;
+ break;
+ }
+ continue;
+ }
+
+ if (streq8(key, "devicetree")) {
+ free(entry->devicetree);
+ entry->devicetree = xstr8_to_path(value);
+ continue;
+ }
+
+ if (streq8(key, "initrd")) {
+ entry->initrd = xrealloc(
+ entry->initrd,
+ n_initrd == 0 ? 0 : (n_initrd + 1) * sizeof(uint16_t *),
+ (n_initrd + 2) * sizeof(uint16_t *));
+ entry->initrd[n_initrd++] = xstr8_to_path(value);
+ entry->initrd[n_initrd] = NULL;
+ continue;
+ }
+
+ if (streq8(key, "options")) {
+ _cleanup_free_ char16_t *new = NULL;
+
+ new = xstr8_to_16(value);
+ if (entry->options) {
+ char16_t *s = xpool_print(L"%s %s", entry->options, new);
+ free(entry->options);
+ entry->options = s;
+ } else
+ entry->options = TAKE_PTR(new);
+
+ continue;
+ }
+ }
+
+ if (entry->type == LOADER_UNDEFINED)
+ return;
+
+ /* check existence */
+ _cleanup_(file_closep) EFI_FILE *handle = NULL;
+ err = root_dir->Open(root_dir, &handle, entry->loader, EFI_FILE_MODE_READ, 0ULL);
+ if (err != EFI_SUCCESS)
+ return;
+
+ entry->device = device;
+ entry->id = xstrdup16(file);
+ strtolower16(entry->id);
+
+ config_add_entry(config, entry);
+
+ config_entry_parse_tries(entry, path, file, L".conf");
+ TAKE_PTR(entry);
+}
+
+static EFI_STATUS efivar_get_timeout(const char16_t *var, uint32_t *ret_value) {
+ _cleanup_free_ char16_t *value = NULL;
+ EFI_STATUS err;
+
+ assert(var);
+ assert(ret_value);
+
+ err = efivar_get(LOADER_GUID, var, &value);
+ if (err != EFI_SUCCESS)
+ return err;
+
+ if (streq16(value, u"menu-force")) {
+ *ret_value = TIMEOUT_MENU_FORCE;
+ return EFI_SUCCESS;
+ }
+ if (streq16(value, u"menu-hidden")) {
+ *ret_value = TIMEOUT_MENU_HIDDEN;
+ return EFI_SUCCESS;
+ }
+
+ uint64_t timeout;
+ if (!parse_number16(value, &timeout, NULL))
+ return EFI_INVALID_PARAMETER;
+
+ *ret_value = MIN(timeout, TIMEOUT_TYPE_MAX);
+ return EFI_SUCCESS;
+}
+
+static void config_load_defaults(Config *config, EFI_FILE *root_dir) {
+ _cleanup_free_ char *content = NULL;
+ UINTN value = 0; /* avoid false maybe-uninitialized warning */
+ EFI_STATUS err;
+
+ assert(root_dir);
+
+ *config = (Config) {
+ .editor = true,
+ .auto_entries = true,
+ .auto_firmware = true,
+ .reboot_for_bitlocker = false,
+ .secure_boot_enroll = ENROLL_MANUAL,
+ .random_seed_mode = RANDOM_SEED_WITH_SYSTEM_TOKEN,
+ .idx_default_efivar = IDX_INVALID,
+ .console_mode = CONSOLE_MODE_KEEP,
+ .console_mode_efivar = CONSOLE_MODE_KEEP,
+ .timeout_sec_config = TIMEOUT_UNSET,
+ .timeout_sec_efivar = TIMEOUT_UNSET,
+ };
+
+ err = file_read(root_dir, L"\\loader\\loader.conf", 0, 0, &content, NULL);
+ if (err == EFI_SUCCESS)
+ config_defaults_load_from_file(config, content);
+
+ err = efivar_get_timeout(u"LoaderConfigTimeout", &config->timeout_sec_efivar);
+ if (err == EFI_SUCCESS)
+ config->timeout_sec = config->timeout_sec_efivar;
+ else if (err != EFI_NOT_FOUND)
+ log_error_stall(u"Error reading LoaderConfigTimeout EFI variable: %r", err);
+
+ err = efivar_get_timeout(u"LoaderConfigTimeoutOneShot", &config->timeout_sec);
+ if (err == EFI_SUCCESS) {
+ /* Unset variable now, after all it's "one shot". */
+ (void) efivar_set(LOADER_GUID, L"LoaderConfigTimeoutOneShot", NULL, EFI_VARIABLE_NON_VOLATILE);
+
+ config->force_menu = true; /* force the menu when this is set */
+ } else if (err != EFI_NOT_FOUND)
+ log_error_stall(u"Error reading LoaderConfigTimeoutOneShot EFI variable: %r", err);
+
+ err = efivar_get_uint_string(LOADER_GUID, L"LoaderConfigConsoleMode", &value);
+ if (err == EFI_SUCCESS)
+ config->console_mode_efivar = value;
+
+ err = efivar_get(LOADER_GUID, L"LoaderEntryOneShot", &config->entry_oneshot);
+ if (err == EFI_SUCCESS)
+ /* Unset variable now, after all it's "one shot". */
+ (void) efivar_set(LOADER_GUID, L"LoaderEntryOneShot", NULL, EFI_VARIABLE_NON_VOLATILE);
+
+ (void) efivar_get(LOADER_GUID, L"LoaderEntryDefault", &config->entry_default_efivar);
+
+ strtolower16(config->entry_default_config);
+ strtolower16(config->entry_default_efivar);
+ strtolower16(config->entry_oneshot);
+ strtolower16(config->entry_saved);
+
+ config->use_saved_entry = streq16(config->entry_default_config, L"@saved");
+ config->use_saved_entry_efivar = streq16(config->entry_default_efivar, L"@saved");
+ if (config->use_saved_entry || config->use_saved_entry_efivar)
+ (void) efivar_get(LOADER_GUID, L"LoaderEntryLastBooted", &config->entry_saved);
+}
+
+static void config_load_entries(
+ Config *config,
+ EFI_HANDLE *device,
+ EFI_FILE *root_dir,
+ const char16_t *loaded_image_path) {
+
+ _cleanup_(file_closep) EFI_FILE *entries_dir = NULL;
+ _cleanup_free_ EFI_FILE_INFO *f = NULL;
+ UINTN f_size = 0;
+ EFI_STATUS err;
+
+ assert(config);
+ assert(device);
+ assert(root_dir);
+
+ /* Adds Boot Loader Type #1 entries (i.e. /loader/entries/….conf) */
+
+ err = open_directory(root_dir, L"\\loader\\entries", &entries_dir);
+ if (err != EFI_SUCCESS)
+ return;
+
+ for (;;) {
+ _cleanup_free_ char *content = NULL;
+
+ err = readdir_harder(entries_dir, &f, &f_size);
+ if (err != EFI_SUCCESS || !f)
+ break;
+
+ if (f->FileName[0] == '.')
+ continue;
+ if (FLAGS_SET(f->Attribute, EFI_FILE_DIRECTORY))
+ continue;
+
+ if (!endswith_no_case(f->FileName, L".conf"))
+ continue;
+ if (startswith(f->FileName, L"auto-"))
+ continue;
+
+ err = file_read(entries_dir, f->FileName, 0, 0, &content, NULL);
+ if (err == EFI_SUCCESS)
+ config_entry_add_type1(config, device, root_dir, L"\\loader\\entries", f->FileName, content, loaded_image_path);
+ }
+}
+
+static int config_entry_compare(const ConfigEntry *a, const ConfigEntry *b) {
+ int r;
+
+ assert(a);
+ assert(b);
+
+ /* Order entries that have no tries left to the end of the list */
+ r = CMP(a->tries_left == 0, b->tries_left == 0);
+ if (r != 0)
+ return r;
+
+ /* If there's a sort key defined for *both* entries, then we do new-style ordering, i.e. by
+ * sort-key/machine-id/version, with a final fallback to id. If there's no sort key for either, we do
+ * old-style ordering, i.e. by id only. If one has sort key and the other does not, we put new-style
+ * before old-style. */
+ r = CMP(!a->sort_key, !b->sort_key);
+ if (r != 0) /* one is old-style, one new-style */
+ return r;
+
+ if (a->sort_key && b->sort_key) {
+ r = strcmp16(a->sort_key, b->sort_key);
+ if (r != 0)
+ return r;
+
+ /* If multiple installations of the same OS are around, group by machine ID */
+ r = strcmp16(a->machine_id, b->machine_id);
+ if (r != 0)
+ return r;
+
+ /* If the sort key was defined, then order by version now (downwards, putting the newest first) */
+ r = -strverscmp_improved(a->version, b->version);
+ if (r != 0)
+ return r;
+ }
+
+ /* Now order by ID. The version is likely part of the ID, thus note that this will generatelly put
+ * the newer versions earlier. Specifying a sort key explicitly is preferable, because it gives an
+ * explicit sort order. */
+ r = -strverscmp_improved(a->id, b->id);
+ if (r != 0)
+ return r;
+
+ if (a->tries_left < 0 || b->tries_left < 0)
+ return 0;
+
+ /* If both items have boot counting, and otherwise are identical, put the entry with more tries left first */
+ r = -CMP(a->tries_left, b->tries_left);
+ if (r != 0)
+ return r;
+
+ /* If they have the same number of tries left, then let the one win which was tried fewer times so far */
+ return CMP(a->tries_done, b->tries_done);
+}
+
+static UINTN config_entry_find(Config *config, const char16_t *pattern) {
+ assert(config);
+
+ /* We expect pattern and entry IDs to be already case folded. */
+
+ if (!pattern)
+ return IDX_INVALID;
+
+ for (UINTN i = 0; i < config->entry_count; i++)
+ if (efi_fnmatch(pattern, config->entries[i]->id))
+ return i;
+
+ return IDX_INVALID;
+}
+
+static void config_default_entry_select(Config *config) {
+ UINTN i;
+
+ assert(config);
+
+ i = config_entry_find(config, config->entry_oneshot);
+ if (i != IDX_INVALID) {
+ config->idx_default = i;
+ return;
+ }
+
+ i = config_entry_find(config, config->use_saved_entry_efivar ? config->entry_saved : config->entry_default_efivar);
+ if (i != IDX_INVALID) {
+ config->idx_default = i;
+ config->idx_default_efivar = i;
+ return;
+ }
+
+ if (config->use_saved_entry)
+ /* No need to do the same thing twice. */
+ i = config->use_saved_entry_efivar ? IDX_INVALID : config_entry_find(config, config->entry_saved);
+ else
+ i = config_entry_find(config, config->entry_default_config);
+ if (i != IDX_INVALID) {
+ config->idx_default = i;
+ return;
+ }
+
+ /* select the first suitable entry */
+ for (i = 0; i < config->entry_count; i++) {
+ if (config->entries[i]->type == LOADER_AUTO || config->entries[i]->call)
+ continue;
+ config->idx_default = i;
+ return;
+ }
+
+ /* If no configured entry to select from was found, enable the menu. */
+ config->idx_default = 0;
+ if (config->timeout_sec == 0)
+ config->timeout_sec = 10;
+}
+
+static bool entries_unique(ConfigEntry **entries, bool *unique, UINTN entry_count) {
+ bool is_unique = true;
+
+ assert(entries);
+ assert(unique);
+
+ for (UINTN i = 0; i < entry_count; i++)
+ for (UINTN k = i + 1; k < entry_count; k++) {
+ if (!streq16(entries[i]->title_show, entries[k]->title_show))
+ continue;
+
+ is_unique = unique[i] = unique[k] = false;
+ }
+
+ return is_unique;
+}
+
+/* generate a unique title, avoiding non-distinguishable menu entries */
+static void config_title_generate(Config *config) {
+ assert(config);
+
+ bool unique[config->entry_count];
+
+ /* set title */
+ for (UINTN i = 0; i < config->entry_count; i++) {
+ assert(!config->entries[i]->title_show);
+ unique[i] = true;
+ config->entries[i]->title_show = xstrdup16(config->entries[i]->title ?: config->entries[i]->id);
+ }
+
+ if (entries_unique(config->entries, unique, config->entry_count))
+ return;
+
+ /* add version to non-unique titles */
+ for (UINTN i = 0; i < config->entry_count; i++) {
+ if (unique[i])
+ continue;
+
+ unique[i] = true;
+
+ if (!config->entries[i]->version)
+ continue;
+
+ _cleanup_free_ char16_t *t = config->entries[i]->title_show;
+ config->entries[i]->title_show = xpool_print(L"%s (%s)", t, config->entries[i]->version);
+ }
+
+ if (entries_unique(config->entries, unique, config->entry_count))
+ return;
+
+ /* add machine-id to non-unique titles */
+ for (UINTN i = 0; i < config->entry_count; i++) {
+ if (unique[i])
+ continue;
+
+ unique[i] = true;
+
+ if (!config->entries[i]->machine_id)
+ continue;
+
+ _cleanup_free_ char16_t *t = config->entries[i]->title_show;
+ config->entries[i]->title_show = xpool_print(
+ L"%s (%.*s)",
+ t,
+ strnlen16(config->entries[i]->machine_id, 8),
+ config->entries[i]->machine_id);
+ }
+
+ if (entries_unique(config->entries, unique, config->entry_count))
+ return;
+
+ /* add file name to non-unique titles */
+ for (UINTN i = 0; i < config->entry_count; i++) {
+ if (unique[i])
+ continue;
+
+ _cleanup_free_ char16_t *t = config->entries[i]->title_show;
+ config->entries[i]->title_show = xpool_print(L"%s (%s)", t, config->entries[i]->id);
+ }
+}
+
+static bool is_sd_boot(EFI_FILE *root_dir, const char16_t *loader_path) {
+ EFI_STATUS err;
+ static const char * const sections[] = {
+ ".sdmagic",
+ NULL
+ };
+ UINTN offset = 0, size = 0, read;
+ _cleanup_free_ char *content = NULL;
+
+ assert(root_dir);
+ assert(loader_path);
+
+ err = pe_file_locate_sections(root_dir, loader_path, sections, &offset, &size);
+ if (err != EFI_SUCCESS || size != sizeof(magic))
+ return false;
+
+ err = file_read(root_dir, loader_path, offset, size, &content, &read);
+ if (err != EFI_SUCCESS || size != read)
+ return false;
+
+ return memcmp(content, magic, sizeof(magic)) == 0;
+}
+
+static ConfigEntry *config_entry_add_loader_auto(
+ Config *config,
+ EFI_HANDLE *device,
+ EFI_FILE *root_dir,
+ const char16_t *loaded_image_path,
+ const char16_t *id,
+ char16_t key,
+ const char16_t *title,
+ const char16_t *loader) {
+
+ assert(config);
+ assert(device);
+ assert(root_dir);
+ assert(id);
+ assert(title);
+
+ if (!config->auto_entries)
+ return NULL;
+
+ if (!loader) {
+ loader = L"\\EFI\\BOOT\\BOOT" EFI_MACHINE_TYPE_NAME ".efi";
+
+ /* We are trying to add the default EFI loader here,
+ * but we do not want to do that if that would be us.
+ *
+ * If the default loader is not us, it might be shim. It would
+ * chainload GRUBX64.EFI in that case, which might be us.*/
+ if (strcaseeq16(loader, loaded_image_path) ||
+ is_sd_boot(root_dir, loader) ||
+ is_sd_boot(root_dir, L"\\EFI\\BOOT\\GRUB" EFI_MACHINE_TYPE_NAME L".EFI"))
+ return NULL;
+ }
+
+ /* check existence */
+ _cleanup_(file_closep) EFI_FILE *handle = NULL;
+ EFI_STATUS err = root_dir->Open(root_dir, &handle, (char16_t *) loader, EFI_FILE_MODE_READ, 0ULL);
+ if (err != EFI_SUCCESS)
+ return NULL;
+
+ ConfigEntry *entry = xnew(ConfigEntry, 1);
+ *entry = (ConfigEntry) {
+ .id = xstrdup16(id),
+ .type = LOADER_AUTO,
+ .title = xstrdup16(title),
+ .device = device,
+ .loader = xstrdup16(loader),
+ .key = key,
+ .tries_done = -1,
+ .tries_left = -1,
+ };
+
+ config_add_entry(config, entry);
+ return entry;
+}
+
+static void config_entry_add_osx(Config *config) {
+ EFI_STATUS err;
+ UINTN n_handles = 0;
+ _cleanup_free_ EFI_HANDLE *handles = NULL;
+
+ assert(config);
+
+ if (!config->auto_entries)
+ return;
+
+ err = BS->LocateHandleBuffer(ByProtocol, &FileSystemProtocol, NULL, &n_handles, &handles);
+ if (err != EFI_SUCCESS)
+ return;
+
+ for (UINTN i = 0; i < n_handles; i++) {
+ _cleanup_(file_closep) EFI_FILE *root = NULL;
+
+ if (open_volume(handles[i], &root) != EFI_SUCCESS)
+ continue;
+
+ if (config_entry_add_loader_auto(
+ config,
+ handles[i],
+ root,
+ NULL,
+ L"auto-osx",
+ 'a',
+ L"macOS",
+ L"\\System\\Library\\CoreServices\\boot.efi"))
+ break;
+ }
+}
+
+static EFI_STATUS boot_windows_bitlocker(void) {
+ _cleanup_free_ EFI_HANDLE *handles = NULL;
+ UINTN n_handles;
+ EFI_STATUS err;
+
+ // FIXME: Experimental for now. Should be generalized, and become a per-entry option that can be
+ // enabled independently of BitLocker, and without a BootXXXX entry pre-existing.
+
+ /* BitLocker key cannot be sealed without a TPM present. */
+ if (!tpm_present())
+ return EFI_NOT_FOUND;
+
+ err = BS->LocateHandleBuffer(ByProtocol, &BlockIoProtocol, NULL, &n_handles, &handles);
+ if (err != EFI_SUCCESS)
+ return err;
+
+ /* Look for BitLocker magic string on all block drives. */
+ bool found = false;
+ for (UINTN i = 0; i < n_handles; i++) {
+ EFI_BLOCK_IO_PROTOCOL *block_io;
+ err = BS->HandleProtocol(handles[i], &BlockIoProtocol, (void **) &block_io);
+ if (err != EFI_SUCCESS || block_io->Media->BlockSize < 512 || block_io->Media->BlockSize > 4096)
+ continue;
+
+ char buf[4096];
+ err = block_io->ReadBlocks(block_io, block_io->Media->MediaId, 0, sizeof(buf), buf);
+ if (err != EFI_SUCCESS)
+ continue;
+
+ if (memcmp(buf + 3, "-FVE-FS-", STRLEN("-FVE-FS-")) == 0) {
+ found = true;
+ break;
+ }
+ }
+
+ /* If no BitLocker drive was found, we can just chainload bootmgfw.efi directly. */
+ if (!found)
+ return EFI_NOT_FOUND;
+
+ _cleanup_free_ uint16_t *boot_order = NULL;
+ UINTN boot_order_size;
+
+ /* There can be gaps in Boot#### entries. Instead of iterating over the full
+ * EFI var list or uint16_t namespace, just look for "Windows Boot Manager" in BootOrder. */
+ err = efivar_get_raw(EFI_GLOBAL_GUID, L"BootOrder", (char **) &boot_order, &boot_order_size);
+ if (err != EFI_SUCCESS || boot_order_size % sizeof(uint16_t) != 0)
+ return err;
+
+ for (UINTN i = 0; i < boot_order_size / sizeof(uint16_t); i++) {
+ _cleanup_free_ char *buf = NULL;
+ char16_t name[sizeof(L"Boot0000")];
+ UINTN buf_size;
+
+ SPrint(name, sizeof(name), L"Boot%04x", (uint32_t) boot_order[i]);
+ err = efivar_get_raw(EFI_GLOBAL_GUID, name, &buf, &buf_size);
+ if (err != EFI_SUCCESS)
+ continue;
+
+ /* Boot#### are EFI_LOAD_OPTION. But we really are only interested
+ * for the description, which is at this offset. */
+ UINTN offset = sizeof(uint32_t) + sizeof(uint16_t);
+ if (buf_size < offset + sizeof(char16_t))
+ continue;
+
+ if (streq16((char16_t *) (buf + offset), L"Windows Boot Manager")) {
+ err = efivar_set_raw(
+ EFI_GLOBAL_GUID,
+ L"BootNext",
+ boot_order + i,
+ sizeof(boot_order[i]),
+ EFI_VARIABLE_NON_VOLATILE);
+ if (err != EFI_SUCCESS)
+ return err;
+ RT->ResetSystem(EfiResetWarm, EFI_SUCCESS, 0, NULL);
+ assert_not_reached();
+ }
+ }
+
+ return EFI_NOT_FOUND;
+}
+
+static void config_entry_add_windows(Config *config, EFI_HANDLE *device, EFI_FILE *root_dir) {
+#if defined(__i386__) || defined(__x86_64__) || defined(__arm__) || defined(__aarch64__)
+ _cleanup_free_ char *bcd = NULL;
+ char16_t *title = NULL;
+ EFI_STATUS err;
+ UINTN len;
+
+ assert(config);
+ assert(device);
+ assert(root_dir);
+
+ if (!config->auto_entries)
+ return;
+
+ /* Try to find a better title. */
+ err = file_read(root_dir, L"\\EFI\\Microsoft\\Boot\\BCD", 0, 100*1024, &bcd, &len);
+ if (err == EFI_SUCCESS)
+ title = get_bcd_title((uint8_t *) bcd, len);
+
+ ConfigEntry *e = config_entry_add_loader_auto(config, device, root_dir, NULL,
+ L"auto-windows", 'w', title ?: L"Windows Boot Manager",
+ L"\\EFI\\Microsoft\\Boot\\bootmgfw.efi");
+
+ if (config->reboot_for_bitlocker)
+ e->call = boot_windows_bitlocker;
+#endif
+}
+
+static void config_entry_add_unified(
+ Config *config,
+ EFI_HANDLE *device,
+ EFI_FILE *root_dir) {
+
+ _cleanup_(file_closep) EFI_FILE *linux_dir = NULL;
+ _cleanup_free_ EFI_FILE_INFO *f = NULL;
+ UINTN f_size = 0;
+ EFI_STATUS err;
+
+ /* Adds Boot Loader Type #2 entries (i.e. /EFI/Linux/….efi) */
+
+ assert(config);
+ assert(device);
+ assert(root_dir);
+
+ err = open_directory(root_dir, L"\\EFI\\Linux", &linux_dir);
+ if (err != EFI_SUCCESS)
+ return;
+
+ for (;;) {
+ enum {
+ SECTION_CMDLINE,
+ SECTION_OSREL,
+ _SECTION_MAX,
+ };
+
+ static const char * const sections[_SECTION_MAX + 1] = {
+ [SECTION_CMDLINE] = ".cmdline",
+ [SECTION_OSREL] = ".osrel",
+ NULL,
+ };
+
+ _cleanup_free_ char16_t *os_pretty_name = NULL, *os_image_id = NULL, *os_name = NULL, *os_id = NULL,
+ *os_image_version = NULL, *os_version = NULL, *os_version_id = NULL, *os_build_id = NULL;
+ const char16_t *good_name, *good_version, *good_sort_key;
+ _cleanup_free_ char *content = NULL;
+ UINTN offs[_SECTION_MAX] = {};
+ UINTN szs[_SECTION_MAX] = {};
+ char *line;
+ UINTN pos = 0;
+ char *key, *value;
+
+ err = readdir_harder(linux_dir, &f, &f_size);
+ if (err != EFI_SUCCESS || !f)
+ break;
+
+ if (f->FileName[0] == '.')
+ continue;
+ if (FLAGS_SET(f->Attribute, EFI_FILE_DIRECTORY))
+ continue;
+ if (!endswith_no_case(f->FileName, L".efi"))
+ continue;
+ if (startswith(f->FileName, L"auto-"))
+ continue;
+
+ /* look for .osrel and .cmdline sections in the .efi binary */
+ err = pe_file_locate_sections(linux_dir, f->FileName, sections, offs, szs);
+ if (err != EFI_SUCCESS || szs[SECTION_OSREL] == 0)
+ continue;
+
+ err = file_read(linux_dir, f->FileName, offs[SECTION_OSREL], szs[SECTION_OSREL], &content, NULL);
+ if (err != EFI_SUCCESS)
+ continue;
+
+ /* read properties from the embedded os-release file */
+ while ((line = line_get_key_value(content, "=", &pos, &key, &value))) {
+ if (streq8(key, "PRETTY_NAME")) {
+ free(os_pretty_name);
+ os_pretty_name = xstr8_to_16(value);
+ continue;
+ }
+
+ if (streq8(key, "IMAGE_ID")) {
+ free(os_image_id);
+ os_image_id = xstr8_to_16(value);
+ continue;
+ }
+
+ if (streq8(key, "NAME")) {
+ free(os_name);
+ os_name = xstr8_to_16(value);
+ continue;
+ }
+
+ if (streq8(key, "ID")) {
+ free(os_id);
+ os_id = xstr8_to_16(value);
+ continue;
+ }
+
+ if (streq8(key, "IMAGE_VERSION")) {
+ free(os_image_version);
+ os_image_version = xstr8_to_16(value);
+ continue;
+ }
+
+ if (streq8(key, "VERSION")) {
+ free(os_version);
+ os_version = xstr8_to_16(value);
+ continue;
+ }
+
+ if (streq8(key, "VERSION_ID")) {
+ free(os_version_id);
+ os_version_id = xstr8_to_16(value);
+ continue;
+ }
+
+ if (streq8(key, "BUILD_ID")) {
+ free(os_build_id);
+ os_build_id = xstr8_to_16(value);
+ continue;
+ }
+ }
+
+ if (!bootspec_pick_name_version_sort_key(
+ os_pretty_name,
+ os_image_id,
+ os_name,
+ os_id,
+ os_image_version,
+ os_version,
+ os_version_id,
+ os_build_id,
+ &good_name,
+ &good_version,
+ &good_sort_key))
+ continue;
+
+ ConfigEntry *entry = xnew(ConfigEntry, 1);
+ *entry = (ConfigEntry) {
+ .id = xstrdup16(f->FileName),
+ .type = LOADER_UNIFIED_LINUX,
+ .title = xstrdup16(good_name),
+ .version = xstrdup16(good_version),
+ .device = device,
+ .loader = xpool_print(L"\\EFI\\Linux\\%s", f->FileName),
+ .sort_key = xstrdup16(good_sort_key),
+ .key = 'l',
+ .tries_done = -1,
+ .tries_left = -1,
+ };
+
+ strtolower16(entry->id);
+ config_add_entry(config, entry);
+ config_entry_parse_tries(entry, L"\\EFI\\Linux", f->FileName, L".efi");
+
+ if (szs[SECTION_CMDLINE] == 0)
+ continue;
+
+ content = mfree(content);
+
+ /* read the embedded cmdline file */
+ size_t cmdline_len;
+ err = file_read(linux_dir, f->FileName, offs[SECTION_CMDLINE], szs[SECTION_CMDLINE], &content, &cmdline_len);
+ if (err == EFI_SUCCESS) {
+ entry->options = xstrn8_to_16(content, cmdline_len);
+ mangle_stub_cmdline(entry->options);
+ }
+ }
+}
+
+static void config_load_xbootldr(
+ Config *config,
+ EFI_HANDLE *device) {
+
+ _cleanup_(file_closep) EFI_FILE *root_dir = NULL;
+ EFI_HANDLE new_device = NULL; /* avoid false maybe-uninitialized warning */
+ EFI_STATUS err;
+
+ assert(config);
+ assert(device);
+
+ err = xbootldr_open(device, &new_device, &root_dir);
+ if (err != EFI_SUCCESS)
+ return;
+
+ config_entry_add_unified(config, new_device, root_dir);
+ config_load_entries(config, new_device, root_dir, NULL);
+}
+
+static EFI_STATUS initrd_prepare(
+ EFI_FILE *root,
+ const ConfigEntry *entry,
+ char16_t **ret_options,
+ void **ret_initrd,
+ UINTN *ret_initrd_size) {
+
+ assert(root);
+ assert(entry);
+ assert(ret_options);
+ assert(ret_initrd);
+ assert(ret_initrd_size);
+
+ if (entry->type != LOADER_LINUX || !entry->initrd) {
+ ret_options = NULL;
+ ret_initrd = NULL;
+ ret_initrd_size = 0;
+ return EFI_SUCCESS;
+ }
+
+ /* Note that order of initrds matters. The kernel will only look for microcode updates in the very
+ * first one it sees. */
+
+ /* Add initrd= to options for older kernels that do not support LINUX_INITRD_MEDIA. Should be dropped
+ * if linux_x86.c is dropped. */
+ _cleanup_free_ char16_t *options = NULL;
+
+ EFI_STATUS err;
+ UINTN size = 0;
+ _cleanup_free_ uint8_t *initrd = NULL;
+
+ STRV_FOREACH(i, entry->initrd) {
+ _cleanup_free_ char16_t *o = options;
+ if (o)
+ options = xpool_print(L"%s initrd=%s", o, *i);
+ else
+ options = xpool_print(L"initrd=%s", *i);
+
+ _cleanup_(file_closep) EFI_FILE *handle = NULL;
+ err = root->Open(root, &handle, *i, EFI_FILE_MODE_READ, 0);
+ if (err != EFI_SUCCESS)
+ return err;
+
+ _cleanup_free_ EFI_FILE_INFO *info = NULL;
+ err = get_file_info_harder(handle, &info, NULL);
+ if (err != EFI_SUCCESS)
+ return err;
+
+ if (info->FileSize == 0) /* Automatically skip over empty files */
+ continue;
+
+ UINTN new_size, read_size = info->FileSize;
+ if (__builtin_add_overflow(size, read_size, &new_size))
+ return EFI_OUT_OF_RESOURCES;
+ initrd = xrealloc(initrd, size, new_size);
+
+ err = chunked_read(handle, &read_size, initrd + size);
+ if (err != EFI_SUCCESS)
+ return err;
+
+ /* Make sure the actual read size is what we expected. */
+ assert(size + read_size == new_size);
+ size = new_size;
+ }
+
+ if (entry->options) {
+ _cleanup_free_ char16_t *o = options;
+ options = xpool_print(L"%s %s", o, entry->options);
+ }
+
+ *ret_options = TAKE_PTR(options);
+ *ret_initrd = TAKE_PTR(initrd);
+ *ret_initrd_size = size;
+ return EFI_SUCCESS;
+}
+
+static EFI_STATUS image_start(
+ EFI_HANDLE parent_image,
+ const ConfigEntry *entry) {
+
+ _cleanup_(devicetree_cleanup) struct devicetree_state dtstate = {};
+ _cleanup_(unload_imagep) EFI_HANDLE image = NULL;
+ _cleanup_free_ EFI_DEVICE_PATH *path = NULL;
+ EFI_STATUS err;
+
+ assert(entry);
+
+ /* If this loader entry has a special way to boot, try that first. */
+ if (entry->call)
+ (void) entry->call();
+
+ _cleanup_(file_closep) EFI_FILE *image_root = NULL;
+ err = open_volume(entry->device, &image_root);
+ if (err != EFI_SUCCESS)
+ return log_error_status_stall(err, L"Error opening root path: %r", err);
+
+ err = make_file_device_path(entry->device, entry->loader, &path);
+ if (err != EFI_SUCCESS)
+ return log_error_status_stall(err, L"Error making file device path: %r", err);
+
+ UINTN initrd_size = 0;
+ _cleanup_free_ void *initrd = NULL;
+ _cleanup_free_ char16_t *options_initrd = NULL;
+ err = initrd_prepare(image_root, entry, &options_initrd, &initrd, &initrd_size);
+ if (err != EFI_SUCCESS)
+ return log_error_status_stall(err, L"Error preparing initrd: %r", err);
+
+ err = shim_load_image(parent_image, path, &image);
+ if (err != EFI_SUCCESS)
+ return log_error_status_stall(err, L"Error loading %s: %r", entry->loader, err);
+
+ /* DTBs are loaded by the kernel before ExitBootServices, and they can be used to map and assign
+ * arbitrary memory ranges, so skip it when secure boot is enabled as the DTB here is unverified. */
+ if (entry->devicetree && !secure_boot_enabled()) {
+ err = devicetree_install(&dtstate, image_root, entry->devicetree);
+ if (err != EFI_SUCCESS)
+ return log_error_status_stall(err, L"Error loading %s: %r", entry->devicetree, err);
+ }
+
+ _cleanup_(cleanup_initrd) EFI_HANDLE initrd_handle = NULL;
+ err = initrd_register(initrd, initrd_size, &initrd_handle);
+ if (err != EFI_SUCCESS)
+ return log_error_status_stall(err, L"Error registering initrd: %r", err);
+
+ EFI_LOADED_IMAGE_PROTOCOL *loaded_image;
+ err = BS->HandleProtocol(image, &LoadedImageProtocol, (void **) &loaded_image);
+ if (err != EFI_SUCCESS)
+ return log_error_status_stall(err, L"Error getting LoadedImageProtocol handle: %r", err);
+
+ char16_t *options = options_initrd ?: entry->options;
+ if (options) {
+ loaded_image->LoadOptions = options;
+ loaded_image->LoadOptionsSize = strsize16(options);
+
+ /* Try to log any options to the TPM, especially to catch manually edited options */
+ (void) tpm_log_load_options(options, NULL);
+ }
+
+ efivar_set_time_usec(LOADER_GUID, L"LoaderTimeExecUSec", 0);
+ err = BS->StartImage(image, NULL, NULL);
+ graphics_mode(false);
+ if (err == EFI_SUCCESS)
+ return EFI_SUCCESS;
+
+ /* Try calling the kernel compat entry point if one exists. */
+ if (err == EFI_UNSUPPORTED && entry->type == LOADER_LINUX) {
+ uint32_t compat_address;
+
+ err = pe_kernel_info(loaded_image->ImageBase, &compat_address);
+ if (err != EFI_SUCCESS) {
+ if (err != EFI_UNSUPPORTED)
+ return log_error_status_stall(err, L"Error finding kernel compat entry address: %r", err);
+ } else if (compat_address > 0) {
+ EFI_IMAGE_ENTRY_POINT kernel_entry =
+ (EFI_IMAGE_ENTRY_POINT) ((uint8_t *) loaded_image->ImageBase + compat_address);
+
+ err = kernel_entry(image, ST);
+ graphics_mode(false);
+ if (err == EFI_SUCCESS)
+ return EFI_SUCCESS;
+ } else
+ err = EFI_UNSUPPORTED;
+ }
+
+ return log_error_status_stall(err, L"Failed to execute %s (%s): %r", entry->title_show, entry->loader, err);
+}
+
+static void config_free(Config *config) {
+ assert(config);
+ for (UINTN i = 0; i < config->entry_count; i++)
+ config_entry_free(config->entries[i]);
+ free(config->entries);
+ free(config->entry_default_config);
+ free(config->entry_default_efivar);
+ free(config->entry_oneshot);
+ free(config->entry_saved);
+}
+
+static void config_write_entries_to_variable(Config *config) {
+ _cleanup_free_ char *buffer = NULL;
+ UINTN sz = 0;
+ char *p;
+
+ assert(config);
+
+ for (UINTN i = 0; i < config->entry_count; i++)
+ sz += strsize16(config->entries[i]->id);
+
+ p = buffer = xmalloc(sz);
+
+ for (UINTN i = 0; i < config->entry_count; i++)
+ p = mempcpy(p, config->entries[i]->id, strsize16(config->entries[i]->id));
+
+ assert(p == buffer + sz);
+
+ /* Store the full list of discovered entries. */
+ (void) efivar_set_raw(LOADER_GUID, L"LoaderEntries", buffer, sz, 0);
+}
+
+static void save_selected_entry(const Config *config, const ConfigEntry *entry) {
+ assert(config);
+ assert(entry);
+ assert(entry->loader || !entry->call);
+
+ /* Always export the selected boot entry to the system in a volatile var. */
+ (void) efivar_set(LOADER_GUID, L"LoaderEntrySelected", entry->id, 0);
+
+ /* Do not save or delete if this was a oneshot boot. */
+ if (streq16(config->entry_oneshot, entry->id))
+ return;
+
+ if (config->use_saved_entry_efivar || (!config->entry_default_efivar && config->use_saved_entry)) {
+ /* Avoid unnecessary NVRAM writes. */
+ if (streq16(config->entry_saved, entry->id))
+ return;
+
+ (void) efivar_set(LOADER_GUID, L"LoaderEntryLastBooted", entry->id, EFI_VARIABLE_NON_VOLATILE);
+ } else
+ /* Delete the non-volatile var if not needed. */
+ (void) efivar_set(LOADER_GUID, L"LoaderEntryLastBooted", NULL, EFI_VARIABLE_NON_VOLATILE);
+}
+
+static EFI_STATUS secure_boot_discover_keys(Config *config, EFI_FILE *root_dir) {
+ EFI_STATUS err;
+ _cleanup_(file_closep) EFI_FILE *keys_basedir = NULL;
+
+ if (secure_boot_mode() != SECURE_BOOT_SETUP)
+ return EFI_SUCCESS;
+
+ /* the lack of a 'keys' directory is not fatal and is silently ignored */
+ err = open_directory(root_dir, u"\\loader\\keys", &keys_basedir);
+ if (err == EFI_NOT_FOUND)
+ return EFI_SUCCESS;
+ if (err != EFI_SUCCESS)
+ return err;
+
+ for (;;) {
+ _cleanup_free_ EFI_FILE_INFO *dirent = NULL;
+ size_t dirent_size = 0;
+ ConfigEntry *entry = NULL;
+
+ err = readdir_harder(keys_basedir, &dirent, &dirent_size);
+ if (err != EFI_SUCCESS || !dirent)
+ return err;
+
+ if (dirent->FileName[0] == '.')
+ continue;
+
+ if (!FLAGS_SET(dirent->Attribute, EFI_FILE_DIRECTORY))
+ continue;
+
+ entry = xnew(ConfigEntry, 1);
+ *entry = (ConfigEntry) {
+ .id = xpool_print(L"secure-boot-keys-%s", dirent->FileName),
+ .title = xpool_print(L"Enroll Secure Boot keys: %s", dirent->FileName),
+ .path = xpool_print(L"\\loader\\keys\\%s", dirent->FileName),
+ .type = LOADER_SECURE_BOOT_KEYS,
+ .tries_done = -1,
+ .tries_left = -1,
+ };
+ config_add_entry(config, entry);
+
+ if (config->secure_boot_enroll == ENROLL_FORCE && strcaseeq16(dirent->FileName, u"auto"))
+ /* if we auto enroll successfully this call does not return, if it fails we still
+ * want to add other potential entries to the menu */
+ secure_boot_enroll_at(root_dir, entry->path);
+ }
+
+ return EFI_SUCCESS;
+}
+
+static void export_variables(
+ EFI_LOADED_IMAGE_PROTOCOL *loaded_image,
+ const char16_t *loaded_image_path,
+ uint64_t init_usec) {
+
+ static const uint64_t loader_features =
+ EFI_LOADER_FEATURE_CONFIG_TIMEOUT |
+ EFI_LOADER_FEATURE_CONFIG_TIMEOUT_ONE_SHOT |
+ EFI_LOADER_FEATURE_ENTRY_DEFAULT |
+ EFI_LOADER_FEATURE_ENTRY_ONESHOT |
+ EFI_LOADER_FEATURE_BOOT_COUNTING |
+ EFI_LOADER_FEATURE_XBOOTLDR |
+ EFI_LOADER_FEATURE_RANDOM_SEED |
+ EFI_LOADER_FEATURE_LOAD_DRIVER |
+ EFI_LOADER_FEATURE_SORT_KEY |
+ EFI_LOADER_FEATURE_SAVED_ENTRY |
+ EFI_LOADER_FEATURE_DEVICETREE |
+ 0;
+
+ _cleanup_free_ char16_t *infostr = NULL, *typestr = NULL;
+ char16_t uuid[37];
+
+ assert(loaded_image);
+
+ efivar_set_time_usec(LOADER_GUID, L"LoaderTimeInitUSec", init_usec);
+ efivar_set(LOADER_GUID, L"LoaderInfo", L"systemd-boot " GIT_VERSION, 0);
+
+ infostr = xpool_print(L"%s %u.%02u", ST->FirmwareVendor, ST->FirmwareRevision >> 16, ST->FirmwareRevision & 0xffff);
+ efivar_set(LOADER_GUID, L"LoaderFirmwareInfo", infostr, 0);
+
+ typestr = xpool_print(L"UEFI %u.%02u", ST->Hdr.Revision >> 16, ST->Hdr.Revision & 0xffff);
+ efivar_set(LOADER_GUID, L"LoaderFirmwareType", typestr, 0);
+
+ (void) efivar_set_uint64_le(LOADER_GUID, L"LoaderFeatures", loader_features, 0);
+
+ /* the filesystem path to this image, to prevent adding ourselves to the menu */
+ efivar_set(LOADER_GUID, L"LoaderImageIdentifier", loaded_image_path, 0);
+
+ /* export the device path this image is started from */
+ if (disk_get_part_uuid(loaded_image->DeviceHandle, uuid) == EFI_SUCCESS)
+ efivar_set(LOADER_GUID, L"LoaderDevicePartUUID", uuid, 0);
+}
+
+static void config_load_all_entries(
+ Config *config,
+ EFI_LOADED_IMAGE_PROTOCOL *loaded_image,
+ const char16_t *loaded_image_path,
+ EFI_FILE *root_dir) {
+
+ assert(config);
+ assert(loaded_image);
+ assert(root_dir);
+
+ config_load_defaults(config, root_dir);
+
+ /* scan /EFI/Linux/ directory */
+ config_entry_add_unified(config, loaded_image->DeviceHandle, root_dir);
+
+ /* scan /loader/entries/\*.conf files */
+ config_load_entries(config, loaded_image->DeviceHandle, root_dir, loaded_image_path);
+
+ /* Similar, but on any XBOOTLDR partition */
+ config_load_xbootldr(config, loaded_image->DeviceHandle);
+
+ /* sort entries after version number */
+ sort_pointer_array((void **) config->entries, config->entry_count, (compare_pointer_func_t) config_entry_compare);
+
+ /* if we find some well-known loaders, add them to the end of the list */
+ config_entry_add_osx(config);
+ config_entry_add_windows(config, loaded_image->DeviceHandle, root_dir);
+ config_entry_add_loader_auto(config, loaded_image->DeviceHandle, root_dir, NULL,
+ L"auto-efi-shell", 's', L"EFI Shell", L"\\shell" EFI_MACHINE_TYPE_NAME ".efi");
+ config_entry_add_loader_auto(config, loaded_image->DeviceHandle, root_dir, loaded_image_path,
+ L"auto-efi-default", '\0', L"EFI Default Loader", NULL);
+
+ if (config->auto_firmware && FLAGS_SET(get_os_indications_supported(), EFI_OS_INDICATIONS_BOOT_TO_FW_UI)) {
+ ConfigEntry *entry = xnew(ConfigEntry, 1);
+ *entry = (ConfigEntry) {
+ .id = xstrdup16(u"auto-reboot-to-firmware-setup"),
+ .title = xstrdup16(u"Reboot Into Firmware Interface"),
+ .call = reboot_into_firmware,
+ .tries_done = -1,
+ .tries_left = -1,
+ };
+ config_add_entry(config, entry);
+ }
+
+ /* find if secure boot signing keys exist and autoload them if necessary
+ otherwise creates menu entries so that the user can load them manually
+ if the secure-boot-enroll variable is set to no (the default), we do not
+ even search for keys on the ESP */
+ if (config->secure_boot_enroll != ENROLL_OFF)
+ secure_boot_discover_keys(config, root_dir);
+
+ if (config->entry_count == 0)
+ return;
+
+ config_write_entries_to_variable(config);
+
+ config_title_generate(config);
+
+ /* select entry by configured pattern or EFI LoaderDefaultEntry= variable */
+ config_default_entry_select(config);
+}
+
+EFI_STATUS efi_main(EFI_HANDLE image, EFI_SYSTEM_TABLE *sys_table) {
+ EFI_LOADED_IMAGE_PROTOCOL *loaded_image;
+ _cleanup_(file_closep) EFI_FILE *root_dir = NULL;
+ _cleanup_(config_free) Config config = {};
+ _cleanup_free_ char16_t *loaded_image_path = NULL;
+ EFI_STATUS err;
+ uint64_t init_usec;
+ bool menu = false;
+
+ InitializeLib(image, sys_table);
+ init_usec = time_usec();
+ debug_hook(L"systemd-boot");
+ /* Uncomment the next line if you need to wait for debugger. */
+ // debug_break();
+
+ err = BS->OpenProtocol(image,
+ &LoadedImageProtocol,
+ (void **)&loaded_image,
+ image,
+ NULL,
+ EFI_OPEN_PROTOCOL_GET_PROTOCOL);
+ if (err != EFI_SUCCESS)
+ return log_error_status_stall(err, L"Error getting a LoadedImageProtocol handle: %r", err);
+
+ (void) device_path_to_str(loaded_image->FilePath, &loaded_image_path);
+
+ export_variables(loaded_image, loaded_image_path, init_usec);
+
+ /* The firmware may skip initializing some devices for the sake of a faster boot. This is especially
+ * true for fastboot enabled firmwares. But this means that things we use like input devices or the
+ * xbootldr partition may not be available yet. Reconnect all drivers should hopefully make the
+ * firmware initialize everything we need. */
+ if (is_direct_boot(loaded_image->DeviceHandle))
+ (void) reconnect_all_drivers();
+
+ err = open_volume(loaded_image->DeviceHandle, &root_dir);
+ if (err != EFI_SUCCESS)
+ return log_error_status_stall(err, L"Unable to open root directory: %r", err);
+
+ (void) load_drivers(image, loaded_image, root_dir);
+
+ config_load_all_entries(&config, loaded_image, loaded_image_path, root_dir);
+
+ if (config.entry_count == 0) {
+ log_error_stall(L"No loader found. Configuration files in \\loader\\entries\\*.conf are needed.");
+ goto out;
+ }
+
+ /* select entry or show menu when key is pressed or timeout is set */
+ if (config.force_menu || config.timeout_sec > 0)
+ menu = true;
+ else {
+ uint64_t key;
+
+ /* Block up to 100ms to give firmware time to get input working. */
+ err = console_key_read(&key, 100 * 1000);
+ if (err == EFI_SUCCESS) {
+ /* find matching key in config entries */
+ UINTN idx = entry_lookup_key(&config, config.idx_default, KEYCHAR(key));
+ if (idx != IDX_INVALID)
+ config.idx_default = idx;
+ else
+ menu = true;
+ }
+ }
+
+ for (;;) {
+ ConfigEntry *entry;
+
+ entry = config.entries[config.idx_default];
+ if (menu) {
+ efivar_set_time_usec(LOADER_GUID, L"LoaderTimeMenuUSec", 0);
+ if (!menu_run(&config, &entry, loaded_image_path))
+ break;
+ }
+
+ /* if auto enrollment is activated, we try to load keys for the given entry. */
+ if (entry->type == LOADER_SECURE_BOOT_KEYS && config.secure_boot_enroll != ENROLL_OFF) {
+ err = secure_boot_enroll_at(root_dir, entry->path);
+ if (err != EFI_SUCCESS)
+ return err;
+ continue;
+ }
+
+ /* Run special entry like "reboot" now. Those that have a loader
+ * will be handled by image_start() instead. */
+ if (entry->call && !entry->loader) {
+ entry->call();
+ continue;
+ }
+
+ (void) config_entry_bump_counters(entry);
+ save_selected_entry(&config, entry);
+
+ /* Optionally, read a random seed off the ESP and pass it to the OS */
+ (void) process_random_seed(root_dir, config.random_seed_mode);
+
+ err = image_start(image, entry);
+ if (err != EFI_SUCCESS)
+ goto out;
+
+ menu = true;
+ config.timeout_sec = 0;
+ }
+ err = EFI_SUCCESS;
+out:
+ BS->CloseProtocol(image, &LoadedImageProtocol, image, NULL);
+ return err;
+}