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a80b52fdbc
systemd/src/boot/efi/boot.c
Michael Biebl a80b52fdbc New upstream version 250.3
2022-01-18 15:34:53 +01:00

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/* 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 "linux.h"
#include "measure.h"
#include "pe.h"
#include "random-seed.h"
#include "secure-boot.h"
#include "shim.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_EFI,
LOADER_LINUX,
};
typedef struct {
CHAR16 *id; /* The unique identifier for this entry (typically the filename of the file defining the entry) */
CHAR16 *title_show; /* The string to actually display (this is made unique before showing) */
CHAR16 *title; /* The raw (human readable) title string of the entry (not necessarily unique) */
CHAR16 *version; /* The raw (human readable) version string of the entry */
CHAR16 *machine_id;
EFI_HANDLE *device;
enum loader_type type;
CHAR16 *loader;
CHAR16 *devicetree;
CHAR16 *options;
CHAR16 key;
EFI_STATUS (*call)(void);
BOOLEAN no_autoselect;
BOOLEAN non_unique;
UINTN tries_done;
UINTN tries_left;
CHAR16 *path;
CHAR16 *current_name;
CHAR16 *next_name;
} ConfigEntry;
typedef struct {
ConfigEntry **entries;
UINTN entry_count;
INTN idx_default;
INTN idx_default_efivar;
UINT32 timeout_sec; /* Actual timeout used (efi_main() override > efivar > config). */
UINT32 timeout_sec_config;
UINT32 timeout_sec_efivar;
CHAR16 *entry_default_config;
CHAR16 *entry_default_efivar;
CHAR16 *entry_oneshot;
CHAR16 *entry_saved;
CHAR16 *options_edit;
BOOLEAN editor;
BOOLEAN auto_entries;
BOOLEAN auto_firmware;
BOOLEAN force_menu;
BOOLEAN use_saved_entry;
BOOLEAN use_saved_entry_efivar;
INT64 console_mode;
INT64 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,
};
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 BOOLEAN line_edit(
const CHAR16 *line_in,
CHAR16 **line_out,
UINTN x_max,
UINTN y_pos) {
_cleanup_freepool_ CHAR16 *line = NULL, *print = NULL;
UINTN size, len, first, cursor, clear;
BOOLEAN exit, enter;
assert(line_out);
if (!line_in)
line_in = L"";
size = StrLen(line_in) + 1024;
line = xnew(CHAR16, size);
StrCpy(line, line_in);
len = StrLen(line);
print = xnew(CHAR16, x_max + 1);
first = 0;
cursor = 0;
clear = 0;
enter = FALSE;
exit = FALSE;
while (!exit) {
EFI_STATUS err;
UINT64 key;
UINTN j;
UINTN cursor_color = TEXT_ATTR_SWAP(COLOR_EDIT);
j = MIN(len - first, x_max);
CopyMem(print, line + first, j * sizeof(CHAR16));
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);
print_at(cursor + 1, y_pos, COLOR_EDIT, print + cursor);
} while (EFI_ERROR(err));
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')):
exit = TRUE;
break;
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_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, CHAR_CARRIAGE_RETURN, 0): /* EZpad Mini 4s firmware sends malformed events */
case KEYPRESS(0, CHAR_CARRIAGE_RETURN, CHAR_CARRIAGE_RETURN): /* Teclast X98+ II firmware sends malformed events */
if (StrCmp(line, line_in) != 0)
*line_out = TAKE_PTR(line);
enter = TRUE;
exit = TRUE;
break;
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;
}
}
return enter;
}
static UINTN entry_lookup_key(Config *config, UINTN start, CHAR16 key) {
assert(config);
if (key == 0)
return -1;
/* 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 -1;
}
static CHAR16 *update_timeout_efivar(UINT32 *t, BOOLEAN 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 xstrdup(L"Menu timeout defined by configuration file.");
case TIMEOUT_MENU_FORCE:
return xstrdup(L"Timeout disabled, menu will always be shown.");
case TIMEOUT_MENU_HIDDEN:
return xstrdup(L"Menu disabled. Hold down key at bootup to show menu.");
default:
return xpool_print(L"Menu timeout set to %u s.", *t);
}
}
static void ps_string(const CHAR16 *fmt, const void *value) {
assert(fmt);
if (value)
Print(fmt, value);
}
static void ps_bool(const CHAR16 *fmt, BOOLEAN value) {
assert(fmt);
Print(fmt, yes_no(value));
}
static void print_status(Config *config, CHAR16 *loaded_image_path) {
UINT64 key;
UINTN x_max, y_max;
SecureBootMode secure;
_cleanup_freepool_ CHAR16 *device_part_uuid = NULL;
assert(config);
assert(loaded_image_path);
clear_screen(COLOR_NORMAL);
console_query_mode(&x_max, &y_max);
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());
Print(L" console mode: %d/%d (%lu x %lu)\n", ST->ConOut->Mode->Mode, ST->ConOut->Mode->MaxMode - 1LL, x_max, y_max);
Print(L"\n--- Press any key to continue. ---\n\n");
console_key_read(&key, UINT64_MAX);
switch (config->timeout_sec_config) {
case TIMEOUT_UNSET:
break;
case TIMEOUT_MENU_FORCE:
Print(L" timeout: menu-force\n"); break;
case TIMEOUT_MENU_HIDDEN:
Print(L" timeout: menu-hidden\n"); break;
default:
Print(L" timeout: %lu 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): %lu s\n", config->timeout_sec_efivar);
}
ps_string(L" default: %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_string(L" random-seed-mode: %s\n", random_seed_modes_table[config->random_seed_mode]);
switch (config->console_mode) {
case CONSOLE_MODE_AUTO:
Print(L" console-mode: %s\n", L"auto"); break;
case CONSOLE_MODE_KEEP:
Print(L" console-mode: %s\n", L"keep"); break;
case CONSOLE_MODE_FIRMWARE_MAX:
Print(L" console-mode: %s\n", L"max"); break;
default:
Print(L" console-mode: %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);
Print(L"\n--- Press any key to continue. ---\n\n");
console_key_read(&key, UINT64_MAX);
for (UINTN i = 0; i < config->entry_count; i++) {
ConfigEntry *entry = config->entries[i];
Print(L" config entry: %lu/%lu\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", streq_ptr(entry->title, entry->title_show) ? NULL : entry->title_show);
ps_string(L" version: %s\n", entry->version);
ps_string(L" machine-id: %s\n", entry->machine_id);
if (entry->device)
Print(L" device: %D\n", DevicePathFromHandle(entry->device));
ps_string(L" loader: %s\n", entry->loader);
ps_string(L" devicetree: %s\n", entry->devicetree);
ps_string(L" options: %s\n", entry->options);
ps_bool(L" auto-select: %s\n", !entry->no_autoselect);
ps_bool(L" internal call: %s\n", !!entry->call);
ps_bool(L"counting boots: %s\n", entry->tries_left != UINTN_MAX);
if (entry->tries_left != UINTN_MAX) {
Print(L" tries: %lu done, %lu left\n", entry->tries_done, entry->tries_left);
Print(L" current path: %s\\%s\n", entry->path, entry->current_name);
Print(L" next path: %s\\%s\n", entry->path, entry->next_name);
}
Print(L"\n--- Press any key to continue, ESC or q to quit. ---\n\n");
console_key_read(&key, UINT64_MAX);
if (key == KEYPRESS(0, SCAN_ESC, 0) || key == KEYPRESS(0, 0, 'q') || key == KEYPRESS(0, 0, 'Q'))
break;
}
}
static EFI_STATUS reboot_into_firmware(void) {
UINT64 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 (EFI_ERROR(err))
return log_error_status_stall(err, L"Error setting OsIndications: %r", err);
err = RT->ResetSystem(EfiResetCold, EFI_SUCCESS, 0, NULL);
return log_error_status_stall(err, L"Error calling ResetSystem: %r", err);
}
static BOOLEAN menu_run(
Config *config,
ConfigEntry **chosen_entry,
CHAR16 *loaded_image_path) {
assert(config);
assert(chosen_entry);
assert(loaded_image_path);
EFI_STATUS err;
UINTN visible_max = 0;
UINTN idx_highlight = config->idx_default;
UINTN idx_highlight_prev = 0;
UINTN idx_first = 0, idx_last = 0;
BOOLEAN new_mode = TRUE, clear = TRUE;
BOOLEAN refresh = TRUE, highlight = FALSE;
UINTN x_start = 0, y_start = 0, y_status = 0;
UINTN x_max, y_max;
_cleanup_(strv_freep) CHAR16 **lines = NULL;
_cleanup_freepool_ CHAR16 *clearline = NULL, *status = NULL;
UINT32 timeout_efivar_saved = config->timeout_sec_efivar;
UINT32 timeout_remain = config->timeout_sec == TIMEOUT_MENU_FORCE ? 0 : config->timeout_sec;
INT16 idx;
BOOLEAN exit = FALSE, run = TRUE, firmware_setup = FALSE;
INT64 console_mode_initial = ST->ConOut->Mode->Mode, console_mode_efivar_saved = config->console_mode_efivar;
INTN 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 (EFI_ERROR(err)) {
clear_screen(COLOR_NORMAL);
log_error_stall(L"Error switching console mode: %r", err);
}
while (!exit) {
UINT64 key;
if (new_mode) {
UINTN line_width = 0, entry_padding = 3;
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 */
for (UINTN i = 0; i < config->entry_count; i++)
line_width = MAX(line_width, StrLen(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) + 4, y_max - 1);
lines = strv_free(lines);
clearline = mfree(clearline);
/* menu entries title lines */
lines = xnew(CHAR16*, config->entry_count + 1);
for (UINTN i = 0; i < config->entry_count; i++) {
UINTN j, padding;
lines[i] = xnew(CHAR16, line_width + 1);
padding = (line_width - MIN(StrLen(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, x_max + 1);
for (UINTN i = 0; i < x_max; i++)
clearline[i] = ' ';
clearline[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 ((INTN)i == config->idx_default_efivar)
print_at(x_start, y_start + i - idx_first,
(i == idx_highlight) ? COLOR_HIGHLIGHT : COLOR_ENTRY,
(CHAR16*) 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 ((INTN)idx_highlight_prev == config->idx_default_efivar)
print_at(x_start , y_start + idx_highlight_prev - idx_first, COLOR_ENTRY, (CHAR16*) L"=>");
if ((INTN)idx_highlight == config->idx_default_efivar)
print_at(x_start, y_start + idx_highlight - idx_first, COLOR_HIGHLIGHT, (CHAR16*) L"=>");
highlight = FALSE;
}
if (timeout_remain > 0) {
FreePool(status);
status = xpool_print(L"Boot in %u s.", timeout_remain);
}
/* print status at last line of screen */
if (status) {
UINTN len;
UINTN x;
/* center line */
len = StrLen(status);
if (len < x_max)
x = (x_max - len) / 2;
else
x = 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);
}
err = console_key_read(&key, timeout_remain > 0 ? 1000 * 1000 : UINT64_MAX);
if (err == EFI_TIMEOUT) {
timeout_remain--;
if (timeout_remain == 0) {
exit = TRUE;
break;
}
/* update status */
continue;
} else
timeout_remain = 0;
/* clear status after keystroke */
if (status) {
FreePool(status);
status = NULL;
print_at(0, y_status, COLOR_NORMAL, clearline + 1);
}
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, CHAR_CARRIAGE_RETURN, 0): /* EZpad Mini 4s firmware sends malformed events */
case KEYPRESS(0, CHAR_CARRIAGE_RETURN, 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 = xstrdup(L"(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 != (INTN)idx_highlight) {
FreePool(config->entry_default_efivar);
config->entry_default_efivar = xstrdup(config->entries[idx_highlight]->id);
config->idx_default_efivar = idx_highlight;
status = xstrdup(L"Default boot entry selected.");
} else {
config->entry_default_efivar = mfree(config->entry_default_efivar);
config->idx_default_efivar = -1;
status = xstrdup(L"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 || config->entries[idx_highlight]->type == LOADER_UNDEFINED)
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, &config->options_edit, 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 " (" EFI_MACHINE_TYPE_NAME "), "
L"UEFI Specification %d.%02d, Vendor %s %d.%02d",
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 (EFI_ERROR(err))
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 (EFI_ERROR(err))
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 < 0)
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) {
if (config->timeout_sec_efivar == TIMEOUT_UNSET)
efivar_set(LOADER_GUID, L"LoaderConfigTimeout", NULL, EFI_VARIABLE_NON_VOLATILE);
else
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);
if ((config->entry_count & 15) == 0) {
UINTN i = config->entry_count + 16;
config->entries = xreallocate_pool(
config->entries,
sizeof(void *) * config->entry_count,
sizeof(void *) * i);
}
config->entries[config->entry_count++] = entry;
}
static void config_entry_free(ConfigEntry *entry) {
if (!entry)
return;
FreePool(entry->id);
FreePool(entry->title_show);
FreePool(entry->title);
FreePool(entry->version);
FreePool(entry->machine_id);
FreePool(entry->loader);
FreePool(entry->devicetree);
FreePool(entry->options);
FreePool(entry->path);
FreePool(entry->current_name);
FreePool(entry->next_name);
FreePool(entry);
}
static inline void config_entry_freep(ConfigEntry **entry) {
config_entry_free(*entry);
}
static CHAR8 *line_get_key_value(
CHAR8 *content,
const CHAR8 *sep,
UINTN *pos,
CHAR8 **key_ret,
CHAR8 **value_ret) {
CHAR8 *line, *value;
UINTN linelen;
assert(content);
assert(sep);
assert(pos);
assert(key_ret);
assert(value_ret);
skip:
line = content + *pos;
if (*line == '\0')
return NULL;
linelen = 0;
while (line[linelen] && !strchra((CHAR8 *)"\n\r", line[linelen]))
linelen++;
/* move pos to next line */
*pos += linelen;
if (content[*pos])
(*pos)++;
/* empty line */
if (linelen == 0)
goto skip;
/* terminate line */
line[linelen] = '\0';
/* remove leading whitespace */
while (strchra((CHAR8 *)" \t", *line)) {
line++;
linelen--;
}
/* remove trailing whitespace */
while (linelen > 0 && strchra((CHAR8 *)" \t", line[linelen-1]))
linelen--;
line[linelen] = '\0';
if (*line == '#')
goto skip;
/* split key/value */
value = line;
while (*value && !strchra(sep, *value))
value++;
if (*value == '\0')
goto skip;
*value = '\0';
value++;
while (*value && strchra(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, CHAR8 *content) {
CHAR8 *line;
UINTN pos = 0;
CHAR8 *key, *value;
EFI_STATUS err;
assert(config);
assert(content);
while ((line = line_get_key_value(content, (CHAR8 *)" \t", &pos, &key, &value))) {
if (strcmpa((CHAR8 *)"timeout", key) == 0) {
if (strcmpa((CHAR8*) "menu-force", value) == 0)
config->timeout_sec_config = TIMEOUT_MENU_FORCE;
else if (strcmpa((CHAR8*) "menu-hidden", value) == 0)
config->timeout_sec_config = TIMEOUT_MENU_HIDDEN;
else {
_cleanup_freepool_ CHAR16 *s = NULL;
s = xstra_to_str(value);
config->timeout_sec_config = MIN(Atoi(s), TIMEOUT_TYPE_MAX);
}
config->timeout_sec = config->timeout_sec_config;
continue;
}
if (strcmpa((CHAR8 *)"default", key) == 0) {
if (value[0] == '@' && strcmpa((CHAR8 *)"@saved", value) != 0) {
log_error_stall(L"Unsupported special entry identifier: %a", value);
continue;
}
FreePool(config->entry_default_config);
config->entry_default_config = xstra_to_str(value);
continue;
}
if (strcmpa((CHAR8 *)"editor", key) == 0) {
err = parse_boolean(value, &config->editor);
if (EFI_ERROR(err))
log_error_stall(L"Error parsing 'editor' config option: %a", value);
continue;
}
if (strcmpa((CHAR8 *)"auto-entries", key) == 0) {
err = parse_boolean(value, &config->auto_entries);
if (EFI_ERROR(err))
log_error_stall(L"Error parsing 'auto-entries' config option: %a", value);
continue;
}
if (strcmpa((CHAR8 *)"auto-firmware", key) == 0) {
err = parse_boolean(value, &config->auto_firmware);
if (EFI_ERROR(err))
log_error_stall(L"Error parsing 'auto-firmware' config option: %a", value);
continue;
}
if (strcmpa((CHAR8 *)"console-mode", key) == 0) {
if (strcmpa((CHAR8 *)"auto", value) == 0)
config->console_mode = CONSOLE_MODE_AUTO;
else if (strcmpa((CHAR8 *)"max", value) == 0)
config->console_mode = CONSOLE_MODE_FIRMWARE_MAX;
else if (strcmpa((CHAR8 *)"keep", value) == 0)
config->console_mode = CONSOLE_MODE_KEEP;
else {
_cleanup_freepool_ CHAR16 *s = NULL;
s = xstra_to_str(value);
config->console_mode = MIN(Atoi(s), (UINTN)CONSOLE_MODE_RANGE_MAX);
}
continue;
}
if (strcmpa((CHAR8*) "random-seed-mode", key) == 0) {
if (strcmpa((CHAR8*) "off", value) == 0)
config->random_seed_mode = RANDOM_SEED_OFF;
else if (strcmpa((CHAR8*) "with-system-token", value) == 0)
config->random_seed_mode = RANDOM_SEED_WITH_SYSTEM_TOKEN;
else if (strcmpa((CHAR8*) "always", value) == 0)
config->random_seed_mode = RANDOM_SEED_ALWAYS;
else {
BOOLEAN on;
err = parse_boolean(value, &on);
if (EFI_ERROR(err)) {
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;
}
}
}
}
static void config_entry_parse_tries(
ConfigEntry *entry,
const CHAR16 *path,
const CHAR16 *file,
const CHAR16 *suffix) {
UINTN left = UINTN_MAX, done = UINTN_MAX, factor = 1, i, next_left, next_done;
_cleanup_freepool_ CHAR16 *prefix = NULL;
assert(entry);
assert(path);
assert(file);
/*
* 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!
*/
i = StrLen(file);
/* Chop off any suffix such as ".conf" or ".efi" */
if (suffix) {
UINTN suffix_length;
suffix_length = StrLen(suffix);
if (i < suffix_length)
return;
i -= suffix_length;
}
/* Go backwards through the string and parse everything we encounter */
for (;;) {
if (i == 0)
return;
i--;
switch (file[i]) {
case '+':
if (left == UINTN_MAX) /* didn't read at least one digit for 'left'? */
return;
if (done == UINTN_MAX) /* no 'done' counter? If so, it's equivalent to 0 */
done = 0;
goto good;
case '-':
if (left == UINTN_MAX) /* didn't parse any digit yet? */
return;
if (done != UINTN_MAX) /* already encountered a dash earlier? */
return;
/* So we encountered a dash. This means this counter is of the form +LEFT-DONE. Let's assign
* what we already parsed to 'done', and start fresh for the 'left' part. */
done = left;
left = UINTN_MAX;
factor = 1;
break;
case '0'...'9': {
UINTN new_factor;
if (left == UINTN_MAX)
left = file[i] - '0';
else {
UINTN new_left, digit;
digit = file[i] - '0';
if (digit > UINTN_MAX / factor) /* overflow check */
return;
new_left = left + digit * factor;
if (new_left < left) /* overflow check */
return;
if (new_left == UINTN_MAX) /* don't allow us to be confused */
return;
}
new_factor = factor * 10;
if (new_factor < factor) /* overflow check */
return;
factor = new_factor;
break;
}
default:
return;
}
}
good:
entry->tries_left = left;
entry->tries_done = done;
entry->path = xstrdup(path);
entry->current_name = xstrdup(file);
next_left = left <= 0 ? 0 : left - 1;
next_done = done >= (UINTN) -2 ? (UINTN) -2 : done + 1;
prefix = xstrdup(file);
prefix[i] = 0;
entry->next_name = xpool_print(L"%s+%u-%u%s", prefix, next_left, next_done, suffix ?: L"");
}
static void config_entry_bump_counters(
ConfigEntry *entry,
EFI_FILE_HANDLE root_dir) {
_cleanup_freepool_ CHAR16* old_path = NULL, *new_path = NULL;
_cleanup_(FileHandleClosep) EFI_FILE_HANDLE handle = NULL;
_cleanup_freepool_ EFI_FILE_INFO *file_info = NULL;
UINTN file_info_size;
EFI_STATUS err;
assert(entry);
assert(root_dir);
if (entry->tries_left == UINTN_MAX)
return;
if (!entry->path || !entry->current_name || !entry->next_name)
return;
old_path = xpool_print(L"%s\\%s", entry->path, entry->current_name);
err = root_dir->Open(root_dir, &handle, old_path, EFI_FILE_MODE_READ|EFI_FILE_MODE_WRITE, 0ULL);
if (EFI_ERROR(err))
return;
err = get_file_info_harder(handle, &file_info, &file_info_size);
if (EFI_ERROR(err))
return;
/* And rename the file */
StrCpy(file_info->FileName, entry->next_name);
err = handle->SetInfo(handle, &GenericFileInfo, file_info_size, file_info);
if (EFI_ERROR(err)) {
log_error_stall(L"Failed to rename '%s' to '%s', ignoring: %r", old_path, entry->next_name, err);
return;
}
/* Flush everything to disk, just in case… */
(void) handle->Flush(handle);
/* 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 (StrCmp(entry->loader, old_path) == 0) {
FreePool(entry->loader);
entry->loader = TAKE_PTR(new_path);
}
}
static void config_entry_add_from_file(
Config *config,
EFI_HANDLE *device,
EFI_FILE *root_dir,
const CHAR16 *path,
const CHAR16 *file,
CHAR8 *content,
const CHAR16 *loaded_image_path) {
_cleanup_(config_entry_freep) ConfigEntry *entry = NULL;
CHAR8 *line;
UINTN pos = 0;
CHAR8 *key, *value;
EFI_STATUS err;
EFI_FILE_HANDLE handle;
_cleanup_freepool_ CHAR16 *initrd = NULL;
assert(config);
assert(device);
assert(root_dir);
assert(path);
assert(file);
assert(content);
entry = xnew(ConfigEntry, 1);
*entry = (ConfigEntry) {
.tries_done = UINTN_MAX,
.tries_left = UINTN_MAX,
};
while ((line = line_get_key_value(content, (CHAR8 *)" \t", &pos, &key, &value))) {
if (strcmpa((CHAR8 *)"title", key) == 0) {
FreePool(entry->title);
entry->title = xstra_to_str(value);
continue;
}
if (strcmpa((CHAR8 *)"version", key) == 0) {
FreePool(entry->version);
entry->version = xstra_to_str(value);
continue;
}
if (strcmpa((CHAR8 *)"machine-id", key) == 0) {
FreePool(entry->machine_id);
entry->machine_id = xstra_to_str(value);
continue;
}
if (strcmpa((CHAR8 *)"linux", key) == 0) {
FreePool(entry->loader);
entry->type = LOADER_LINUX;
entry->loader = xstra_to_path(value);
entry->key = 'l';
continue;
}
if (strcmpa((CHAR8 *)"efi", key) == 0) {
entry->type = LOADER_EFI;
FreePool(entry->loader);
entry->loader = xstra_to_path(value);
/* do not add an entry for ourselves */
if (loaded_image_path && StriCmp(entry->loader, loaded_image_path) == 0) {
entry->type = LOADER_UNDEFINED;
break;
}
continue;
}
if (strcmpa((CHAR8 *)"architecture", key) == 0) {
/* do not add an entry for an EFI image of architecture not matching with that of the image */
if (strcmpa((CHAR8 *)EFI_MACHINE_TYPE_NAME, value) != 0) {
entry->type = LOADER_UNDEFINED;
break;
}
continue;
}
if (strcmpa((CHAR8 *)"devicetree", key) == 0) {
FreePool(entry->devicetree);
entry->devicetree = xstra_to_path(value);
continue;
}
if (strcmpa((CHAR8 *)"initrd", key) == 0) {
_cleanup_freepool_ CHAR16 *new = NULL;
new = xstra_to_path(value);
if (initrd) {
CHAR16 *s;
s = xpool_print(L"%s initrd=%s", initrd, new);
FreePool(initrd);
initrd = s;
} else
initrd = xpool_print(L"initrd=%s", new);
continue;
}
if (strcmpa((CHAR8 *)"options", key) == 0) {
_cleanup_freepool_ CHAR16 *new = NULL;
new = xstra_to_str(value);
if (entry->options) {
CHAR16 *s;
s = xpool_print(L"%s %s", entry->options, new);
FreePool(entry->options);
entry->options = s;
} else
entry->options = TAKE_PTR(new);
continue;
}
}
if (entry->type == LOADER_UNDEFINED)
return;
/* check existence */
err = root_dir->Open(root_dir, &handle, entry->loader, EFI_FILE_MODE_READ, 0ULL);
if (EFI_ERROR(err))
return;
handle->Close(handle);
/* add initrd= to options */
if (entry->type == LOADER_LINUX && initrd) {
if (entry->options) {
CHAR16 *s;
s = xpool_print(L"%s %s", initrd, entry->options);
FreePool(entry->options);
entry->options = s;
} else
entry->options = TAKE_PTR(initrd);
}
entry->device = device;
entry->id = xstrdup(file);
StrLwr(entry->id);
config_add_entry(config, entry);
config_entry_parse_tries(entry, path, file, L".conf");
TAKE_PTR(entry);
}
static void config_load_defaults(Config *config, EFI_FILE *root_dir) {
_cleanup_freepool_ CHAR8 *content = NULL;
UINTN value;
EFI_STATUS err;
assert(root_dir);
*config = (Config) {
.editor = TRUE,
.auto_entries = TRUE,
.auto_firmware = TRUE,
.random_seed_mode = RANDOM_SEED_WITH_SYSTEM_TOKEN,
.idx_default_efivar = -1,
.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 (!EFI_ERROR(err))
config_defaults_load_from_file(config, content);
err = efivar_get_uint_string(LOADER_GUID, L"LoaderConfigTimeout", &value);
if (!EFI_ERROR(err)) {
config->timeout_sec_efivar = MIN(value, TIMEOUT_TYPE_MAX);
config->timeout_sec = config->timeout_sec_efivar;
}
err = efivar_get_uint_string(LOADER_GUID, L"LoaderConfigTimeoutOneShot", &value);
if (!EFI_ERROR(err)) {
/* Unset variable now, after all it's "one shot". */
(void) efivar_set(LOADER_GUID, L"LoaderConfigTimeoutOneShot", NULL, EFI_VARIABLE_NON_VOLATILE);
config->timeout_sec = MIN(value, TIMEOUT_TYPE_MAX);
config->force_menu = TRUE; /* force the menu when this is set */
}
err = efivar_get_uint_string(LOADER_GUID, L"LoaderConfigConsoleMode", &value);
if (!EFI_ERROR(err))
config->console_mode_efivar = value;
err = efivar_get(LOADER_GUID, L"LoaderEntryOneShot", &config->entry_oneshot);
if (!EFI_ERROR(err))
/* 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);
config->use_saved_entry = streq_ptr(config->entry_default_config, L"@saved");
config->use_saved_entry_efivar = streq_ptr(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 *loaded_image_path) {
_cleanup_(FileHandleClosep) EFI_FILE_HANDLE entries_dir = NULL;
_cleanup_freepool_ EFI_FILE_INFO *f = NULL;
UINTN f_size = 0;
EFI_STATUS err;
assert(config);
assert(device);
assert(root_dir);
err = open_directory(root_dir, L"\\loader\\entries", &entries_dir);
if (EFI_ERROR(err))
return;
for (;;) {
_cleanup_freepool_ CHAR8 *content = NULL;
err = readdir_harder(entries_dir, &f, &f_size);
if (EFI_ERROR(err) || !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 (!EFI_ERROR(err))
config_entry_add_from_file(config, device, root_dir, L"\\loader\\entries", f->FileName, content, loaded_image_path);
}
}
static INTN config_entry_compare(const ConfigEntry *a, const ConfigEntry *b) {
INTN r;
assert(a);
assert(b);
/* Order entries that have no tries left to the beginning of the list */
if (a->tries_left != 0 && b->tries_left == 0)
return 1;
if (a->tries_left == 0 && b->tries_left != 0)
return -1;
r = strverscmp_improved(a->id, b->id);
if (r != 0)
return r;
if (a->tries_left == UINTN_MAX ||
b->tries_left == UINTN_MAX)
return 0;
/* If both items have boot counting, and otherwise are identical, put the entry with more tries left last */
if (a->tries_left > b->tries_left)
return 1;
if (a->tries_left < b->tries_left)
return -1;
/* If they have the same number of tries left, then let the one win which was tried fewer times so far */
if (a->tries_done < b->tries_done)
return 1;
if (a->tries_done > b->tries_done)
return -1;
return 0;
}
static void config_sort_entries(Config *config) {
assert(config);
sort_pointer_array((void**) config->entries, config->entry_count, (compare_pointer_func_t) config_entry_compare);
}
static INTN config_entry_find(Config *config, const CHAR16 *needle) {
assert(config);
if (!needle)
return -1;
for (INTN i = config->entry_count - 1; i >= 0; i--)
if (MetaiMatch(config->entries[i]->id, (CHAR16*) needle))
return i;
return -1;
}
static void config_default_entry_select(Config *config) {
INTN i;
assert(config);
i = config_entry_find(config, config->entry_oneshot);
if (i >= 0) {
config->idx_default = i;
return;
}
i = config_entry_find(config, config->use_saved_entry_efivar ? config->entry_saved : config->entry_default_efivar);
if (i >= 0) {
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 ? -1 : config_entry_find(config, config->entry_saved);
else
i = config_entry_find(config, config->entry_default_config);
if (i >= 0) {
config->idx_default = i;
return;
}
/* select the last suitable entry */
i = config->entry_count;
while (i--) {
if (config->entries[i]->no_autoselect)
continue;
config->idx_default = i;
return;
}
/* no entry found */
config->idx_default = -1;
}
static BOOLEAN find_nonunique(ConfigEntry **entries, UINTN entry_count) {
BOOLEAN non_unique = FALSE;
assert(entries);
for (UINTN i = 0; i < entry_count; i++)
entries[i]->non_unique = FALSE;
for (UINTN i = 0; i < entry_count; i++)
for (UINTN k = 0; k < entry_count; k++) {
if (i == k)
continue;
if (StrCmp(entries[i]->title_show, entries[k]->title_show) != 0)
continue;
non_unique = entries[i]->non_unique = entries[k]->non_unique = TRUE;
}
return non_unique;
}
/* generate a unique title, avoiding non-distinguishable menu entries */
static void config_title_generate(Config *config) {
assert(config);
/* set title */
for (UINTN i = 0; i < config->entry_count; i++) {
FreePool(config->entries[i]->title_show);
config->entries[i]->title_show = xstrdup(
config->entries[i]->title ?: config->entries[i]->id);
}
if (!find_nonunique(config->entries, config->entry_count))
return;
/* add version to non-unique titles */
for (UINTN i = 0; i < config->entry_count; i++) {
CHAR16 *s;
if (!config->entries[i]->non_unique)
continue;
if (!config->entries[i]->version)
continue;
s = xpool_print(L"%s (%s)", config->entries[i]->title_show, config->entries[i]->version);
FreePool(config->entries[i]->title_show);
config->entries[i]->title_show = s;
}
if (!find_nonunique(config->entries, config->entry_count))
return;
/* add machine-id to non-unique titles */
for (UINTN i = 0; i < config->entry_count; i++) {
CHAR16 *s;
_cleanup_freepool_ CHAR16 *m = NULL;
if (!config->entries[i]->non_unique)
continue;
if (!config->entries[i]->machine_id)
continue;
m = xstrdup(config->entries[i]->machine_id);
m[8] = '\0';
s = xpool_print(L"%s (%s)", config->entries[i]->title_show, m);
FreePool(config->entries[i]->title_show);
config->entries[i]->title_show = s;
}
if (!find_nonunique(config->entries, config->entry_count))
return;
/* add file name to non-unique titles */
for (UINTN i = 0; i < config->entry_count; i++) {
CHAR16 *s;
if (!config->entries[i]->non_unique)
continue;
s = xpool_print(L"%s (%s)", config->entries[i]->title_show, config->entries[i]->id);
FreePool(config->entries[i]->title_show);
config->entries[i]->title_show = s;
config->entries[i]->non_unique = FALSE;
}
}
static BOOLEAN config_entry_add_call(
Config *config,
const CHAR16 *id,
const CHAR16 *title,
EFI_STATUS (*call)(void)) {
ConfigEntry *entry;
assert(config);
assert(id);
assert(title);
assert(call);
entry = xnew(ConfigEntry, 1);
*entry = (ConfigEntry) {
.id = xstrdup(id),
.title = xstrdup(title),
.call = call,
.no_autoselect = TRUE,
.tries_done = UINTN_MAX,
.tries_left = UINTN_MAX,
};
config_add_entry(config, entry);
return TRUE;
}
static ConfigEntry *config_entry_add_loader(
Config *config,
EFI_HANDLE *device,
enum loader_type type,
const CHAR16 *id,
CHAR16 key,
const CHAR16 *title,
const CHAR16 *loader,
const CHAR16 *version) {
ConfigEntry *entry;
assert(config);
assert(device);
assert(id);
assert(title);
assert(loader);
entry = xnew(ConfigEntry, 1);
*entry = (ConfigEntry) {
.type = type,
.title = xstrdup(title),
.version = version ? xstrdup(version) : NULL,
.device = device,
.loader = xstrdup(loader),
.id = xstrdup(id),
.key = key,
.tries_done = UINTN_MAX,
.tries_left = UINTN_MAX,
};
StrLwr(entry->id);
config_add_entry(config, entry);
return entry;
}
static BOOLEAN is_sd_boot(EFI_FILE *root_dir, const CHAR16 *loader_path) {
EFI_STATUS err;
const CHAR8 *sections[] = {
(CHAR8 *)".sdmagic",
NULL
};
UINTN offset = 0, size = 0, read;
_cleanup_freepool_ CHAR8 *content = NULL;
assert(root_dir);
assert(loader_path);
err = pe_file_locate_sections(root_dir, loader_path, sections, &offset, &size);
if (EFI_ERROR(err) || size != sizeof(magic))
return FALSE;
err = file_read(root_dir, loader_path, offset, size, &content, &read);
if (EFI_ERROR(err) || size != read)
return FALSE;
return CompareMem(content, magic, sizeof(magic)) == 0;
}
static BOOLEAN config_entry_add_loader_auto(
Config *config,
EFI_HANDLE *device,
EFI_FILE *root_dir,
const CHAR16 *loaded_image_path,
const CHAR16 *id,
CHAR16 key,
const CHAR16 *title,
const CHAR16 *loader) {
EFI_FILE_HANDLE handle;
ConfigEntry *entry;
EFI_STATUS err;
assert(config);
assert(device);
assert(root_dir);
assert(id);
assert(title);
assert(loader || loaded_image_path);
if (!config->auto_entries)
return FALSE;
if (loaded_image_path) {
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 (StriCmp(loader, loaded_image_path) == 0 ||
is_sd_boot(root_dir, loader) ||
is_sd_boot(root_dir, L"\\EFI\\BOOT\\GRUB" EFI_MACHINE_TYPE_NAME L".EFI"))
return FALSE;
}
/* check existence */
err = root_dir->Open(root_dir, &handle, (CHAR16*) loader, EFI_FILE_MODE_READ, 0ULL);
if (EFI_ERROR(err))
return FALSE;
handle->Close(handle);
entry = config_entry_add_loader(config, device, LOADER_UNDEFINED, id, key, title, loader, NULL);
if (!entry)
return FALSE;
/* do not boot right away into auto-detected entries */
entry->no_autoselect = TRUE;
return TRUE;
}
static void config_entry_add_osx(Config *config) {
EFI_STATUS err;
UINTN handle_count = 0;
_cleanup_freepool_ EFI_HANDLE *handles = NULL;
assert(config);
if (!config->auto_entries)
return;
err = LibLocateHandle(ByProtocol, &FileSystemProtocol, NULL, &handle_count, &handles);
if (!EFI_ERROR(err)) {
for (UINTN i = 0; i < handle_count; i++) {
EFI_FILE *root;
BOOLEAN found;
root = LibOpenRoot(handles[i]);
if (!root)
continue;
found = config_entry_add_loader_auto(config, handles[i], root, NULL, L"auto-osx", 'a', L"macOS",
L"\\System\\Library\\CoreServices\\boot.efi");
root->Close(root);
if (found)
break;
}
}
}
static void config_entry_add_windows(Config *config, EFI_HANDLE *device, EFI_FILE *root_dir) {
_cleanup_freepool_ CHAR8 *bcd = NULL;
CHAR16 *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 (!EFI_ERROR(err))
title = get_bcd_title((UINT8 *) bcd, len);
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");
}
static void config_entry_add_linux(
Config *config,
EFI_HANDLE *device,
EFI_FILE *root_dir) {
_cleanup_(FileHandleClosep) EFI_FILE_HANDLE linux_dir = NULL;
_cleanup_freepool_ EFI_FILE_INFO *f = NULL;
ConfigEntry *entry;
UINTN f_size = 0;
EFI_STATUS err;
assert(config);
assert(device);
assert(root_dir);
err = open_directory(root_dir, L"\\EFI\\Linux", &linux_dir);
if (EFI_ERROR(err))
return;
for (;;) {
enum {
SECTION_CMDLINE,
SECTION_OSREL,
_SECTION_MAX,
};
static const CHAR8* const sections[_SECTION_MAX + 1] = {
[SECTION_CMDLINE] = (const CHAR8 *) ".cmdline",
[SECTION_OSREL] = (const CHAR8 *) ".osrel",
NULL,
};
_cleanup_freepool_ CHAR16 *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,
*path = NULL;
const CHAR16 *good_name, *good_version;
_cleanup_freepool_ CHAR8 *content = NULL;
UINTN offs[_SECTION_MAX] = {};
UINTN szs[_SECTION_MAX] = {};
CHAR8 *line;
UINTN pos = 0;
CHAR8 *key, *value;
err = readdir_harder(linux_dir, &f, &f_size);
if (EFI_ERROR(err) || !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, (const CHAR8**) sections, offs, szs);
if (EFI_ERROR(err) || szs[SECTION_OSREL] == 0)
continue;
err = file_read(linux_dir, f->FileName, offs[SECTION_OSREL], szs[SECTION_OSREL], &content, NULL);
if (EFI_ERROR(err))
continue;
/* read properties from the embedded os-release file */
while ((line = line_get_key_value(content, (CHAR8 *)"=", &pos, &key, &value))) {
if (strcmpa((const CHAR8*) "PRETTY_NAME", key) == 0) {
FreePool(os_pretty_name);
os_pretty_name = xstra_to_str(value);
continue;
}
if (strcmpa((const CHAR8*) "IMAGE_ID", key) == 0) {
FreePool(os_image_id);
os_image_id = xstra_to_str(value);
continue;
}
if (strcmpa((const CHAR8*) "NAME", key) == 0) {
FreePool(os_name);
os_name = xstra_to_str(value);
continue;
}
if (strcmpa((const CHAR8*) "ID", key) == 0) {
FreePool(os_id);
os_id = xstra_to_str(value);
continue;
}
if (strcmpa((const CHAR8*) "IMAGE_VERSION", key) == 0) {
FreePool(os_image_version);
os_image_version = xstra_to_str(value);
continue;
}
if (strcmpa((const CHAR8*) "VERSION", key) == 0) {
FreePool(os_version);
os_version = xstra_to_str(value);
continue;
}
if (strcmpa((const CHAR8*) "VERSION_ID", key) == 0) {
FreePool(os_version_id);
os_version_id = xstra_to_str(value);
continue;
}
if (strcmpa((const CHAR8*) "BUILD_ID", key) == 0) {
FreePool(os_build_id);
os_build_id = xstra_to_str(value);
continue;
}
}
if (!bootspec_pick_name_version(
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))
continue;
path = xpool_print(L"\\EFI\\Linux\\%s", f->FileName);
entry = config_entry_add_loader(
config,
device,
LOADER_LINUX,
f->FileName,
/* key= */ 'l',
good_name,
path,
good_version);
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 */
err = file_read(linux_dir, f->FileName, offs[SECTION_CMDLINE], szs[SECTION_CMDLINE], &content, NULL);
if (!EFI_ERROR(err)) {
/* chomp the newline */
if (content[szs[SECTION_CMDLINE] - 1] == '\n')
content[szs[SECTION_CMDLINE] - 1] = '\0';
entry->options = xstra_to_str(content);
}
}
}
static void config_load_xbootldr(
Config *config,
EFI_HANDLE *device) {
EFI_HANDLE new_device;
EFI_FILE *root_dir;
EFI_STATUS err;
assert(config);
assert(device);
err = xbootldr_open(device, &new_device, &root_dir);
if (EFI_ERROR(err))
return;
config_entry_add_linux(config, new_device, root_dir);
config_load_entries(config, new_device, root_dir, NULL);
}
static EFI_STATUS image_start(
EFI_FILE_HANDLE root_dir,
EFI_HANDLE parent_image,
const Config *config,
const ConfigEntry *entry) {
_cleanup_(devicetree_cleanup) struct devicetree_state dtstate = {};
EFI_HANDLE image;
_cleanup_freepool_ EFI_DEVICE_PATH *path = NULL;
CHAR16 *options;
EFI_STATUS err;
assert(config);
assert(entry);
path = FileDevicePath(entry->device, entry->loader);
if (!path)
return log_error_status_stall(EFI_INVALID_PARAMETER, L"Error getting device path.");
err = BS->LoadImage(FALSE, parent_image, path, NULL, 0, &image);
if (EFI_ERROR(err))
return log_error_status_stall(err, L"Error loading %s: %r", entry->loader, err);
if (entry->devicetree) {
err = devicetree_install(&dtstate, root_dir, entry->devicetree);
if (EFI_ERROR(err))
return log_error_status_stall(err, L"Error loading %s: %r", entry->devicetree, err);
}
if (config->options_edit)
options = config->options_edit;
else if (entry->options)
options = entry->options;
else
options = NULL;
if (options) {
EFI_LOADED_IMAGE *loaded_image;
err = BS->OpenProtocol(image, &LoadedImageProtocol, (void **)&loaded_image,
parent_image, NULL, EFI_OPEN_PROTOCOL_GET_PROTOCOL);
if (EFI_ERROR(err)) {
log_error_stall(L"Error getting LoadedImageProtocol handle: %r", err);
goto out_unload;
}
loaded_image->LoadOptions = options;
loaded_image->LoadOptionsSize = StrSize(loaded_image->LoadOptions);
/* Try to log any options to the TPM, especially to catch manually edited options */
(void) tpm_log_load_options(options);
}
efivar_set_time_usec(LOADER_GUID, L"LoaderTimeExecUSec", 0);
err = BS->StartImage(image, NULL, NULL);
out_unload:
BS->UnloadImage(image);
return err;
}
static void config_free(Config *config) {
assert(config);
for (UINTN i = 0; i < config->entry_count; i++)
config_entry_free(config->entries[i]);
FreePool(config->entries);
FreePool(config->entry_default_config);
FreePool(config->options_edit);
FreePool(config->entry_oneshot);
}
static void config_write_entries_to_variable(Config *config) {
_cleanup_freepool_ CHAR8 *buffer = NULL;
UINTN sz = 0;
CHAR8 *p;
assert(config);
for (UINTN i = 0; i < config->entry_count; i++)
sz += StrSize(config->entries[i]->id);
p = buffer = xallocate_pool(sz);
for (UINTN i = 0; i < config->entry_count; i++) {
UINTN l;
l = StrSize(config->entries[i]->id);
CopyMem(p, config->entries[i]->id, l);
p += l;
}
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->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 (streq_ptr(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 (streq_ptr(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 void export_variables(
EFI_LOADED_IMAGE *loaded_image,
const CHAR16 *loaded_image_path,
UINT64 init_usec) {
static const UINT64 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 |
0;
_cleanup_freepool_ CHAR16 *infostr = NULL, *typestr = NULL;
CHAR16 uuid[37];
assert(loaded_image);
assert(loaded_image_path);
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 %d.%02d", ST->FirmwareVendor, ST->FirmwareRevision >> 16, ST->FirmwareRevision & 0xffff);
efivar_set(LOADER_GUID, L"LoaderFirmwareInfo", infostr, 0);
typestr = xpool_print(L"UEFI %d.%02d", 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 *loaded_image,
const CHAR16 *loaded_image_path,
EFI_FILE *root_dir) {
assert(config);
assert(loaded_image);
assert(loaded_image_path);
assert(root_dir);
config_load_defaults(config, root_dir);
/* scan /EFI/Linux/ directory */
config_entry_add_linux(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 */
config_sort_entries(config);
/* 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))
config_entry_add_call(config,
L"auto-reboot-to-firmware-setup",
L"Reboot Into Firmware Interface",
reboot_into_firmware);
}
EFI_STATUS efi_main(EFI_HANDLE image, EFI_SYSTEM_TABLE *sys_table) {
EFI_LOADED_IMAGE *loaded_image;
_cleanup_(FileHandleClosep) EFI_FILE *root_dir = NULL;
_cleanup_(config_free) Config config = {};
CHAR16 *loaded_image_path;
EFI_STATUS err;
UINT64 init_usec;
BOOLEAN menu = FALSE;
InitializeLib(image, sys_table);
init_usec = time_usec();
err = BS->OpenProtocol(image,
&LoadedImageProtocol,
(void **)&loaded_image,
image,
NULL,
EFI_OPEN_PROTOCOL_GET_PROTOCOL);
if (EFI_ERROR(err))
return log_error_status_stall(err, L"Error getting a LoadedImageProtocol handle: %r", err);
loaded_image_path = DevicePathToStr(loaded_image->FilePath);
if (!loaded_image_path)
return log_oom();
export_variables(loaded_image, loaded_image_path, init_usec);
root_dir = LibOpenRoot(loaded_image->DeviceHandle);
if (!root_dir)
return log_error_status_stall(EFI_LOAD_ERROR, L"Unable to open root directory.", EFI_LOAD_ERROR);
if (secure_boot_enabled() && shim_loaded()) {
err = security_policy_install();
if (EFI_ERROR(err))
return log_error_status_stall(err, L"Error installing security policy: %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;
}
config_write_entries_to_variable(&config);
config_title_generate(&config);
/* select entry by configured pattern or EFI LoaderDefaultEntry= variable */
config_default_entry_select(&config);
/* if no configured entry to select from was found, enable the menu */
if (config.idx_default == -1) {
config.idx_default = 0;
if (config.timeout_sec == 0)
config.timeout_sec = 10;
}
/* 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 key;
/* Block up to 100ms to give firmware time to get input working. */
err = console_key_read(&key, 100 * 1000);
if (!EFI_ERROR(err)) {
INT16 idx;
/* find matching key in config entries */
idx = entry_lookup_key(&config, config.idx_default, KEYCHAR(key));
if (idx >= 0)
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;
}
/* run special entry like "reboot" */
if (entry->call) {
entry->call();
continue;
}
config_entry_bump_counters(entry, root_dir);
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(root_dir, image, &config, entry);
if (EFI_ERROR(err)) {
graphics_mode(FALSE);
log_error_stall(L"Failed to execute %s (%s): %r", entry->title_show, entry->loader, err);
goto out;
}
menu = TRUE;
config.timeout_sec = 0;
}
err = EFI_SUCCESS;
out:
BS->CloseProtocol(image, &LoadedImageProtocol, image, NULL);
return err;
}
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