From 541a3f09ecb062e3f0778eb9846732cfabcbfbba Mon Sep 17 00:00:00 2001
From: Paul Kocialkowski <contact@paulk.fr>
Date: Tue, 11 Aug 2015 11:22:54 +0200
Subject: [PATCH 7/7] vboot: Display callbacks for developer and recovery mode
screens
We don't want to use bitmaps stored in GBB since they recommend the use of non-
free software (Chrome OS), so this implements a text-based interface instead.
Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
---
src/vboot/callbacks/display.c | 168 +++++++++++++++++++++++++++++++++++++++---
1 file changed, 156 insertions(+), 12 deletions(-)
diff --git a/src/vboot/callbacks/display.c b/src/vboot/callbacks/display.c
index efa0691..b659f7b 100644
--- a/src/vboot/callbacks/display.c
+++ b/src/vboot/callbacks/display.c
@@ -84,9 +84,17 @@ void print_on_center(const char *msg)
print_string(msg);
}
-VbError_t VbExDisplayScreen(uint32_t screen_type)
+VbError_t VbExDisplayScreen(uint32_t screen_type, VbNvContext *vnc)
{
- const char *msg = NULL;
+ unsigned int rows, cols;
+ uint32_t boot_signed_only = 0;
+ uint32_t boot_usb = 0;
+ uint32_t boot_legacy = 0;
+ const char *fw_id;
+ int fw_index;
+ void *blob = NULL;
+ int size = 0;
+ char *msg;
/*
* Show the debug messages for development. It is a backup method
@@ -98,31 +106,167 @@ VbError_t VbExDisplayScreen(uint32_t screen_type)
video_console_clear();
break;
case VB_SCREEN_DEVELOPER_WARNING:
- msg = "developer mode warning";
+ video_console_clear();
+ video_console_set_cursor(0, 0);
+
+ if (vnc != NULL) {
+ VbNvGet(vnc, VBNV_DEV_BOOT_SIGNED_ONLY,
+ &boot_signed_only);
+
+ VbNvGet(vnc, VBNV_DEV_BOOT_USB, &boot_usb);
+ VbNvGet(vnc, VBNV_DEV_BOOT_LEGACY, &boot_legacy);
+ }
+
+ print_string(
+ "Welcome to developer mode!\n\n"
+ "Useful key combinations:\n"
+ "- Ctrl + H: Hold developer mode\n"
+ "- Ctrl + D: Boot from internal storage\n");
+
+ if (boot_usb)
+ print_string("- Ctrl + U: Boot from external media\n");
+
+ if (boot_legacy)
+ print_string("- Ctrl + L: Boot from legacy payload\n");
+
+ print_string(
+ "- Ctrl + I: Show device information\n"
+ "- Space: Disable developer mode\n\n"
+ "This screen is shown for 3 seconds (if not held)."
+ "\n\n");
+
+ if (vnc != NULL) {
+ if (!boot_signed_only)
+ print_string(
+ "Warning: this device will boot kernels"
+ " without verifying their signature!"
+ "\n");
+
+ if (boot_usb)
+ print_string(
+ "Warning: this device will boot from "
+ "external media!\n");
+
+ if (boot_legacy)
+ print_string(
+ "Warning: this device will boot legacy "
+ "payloads!\n");
+
+ if (!boot_signed_only || boot_usb)
+ print_string("\n");
+ }
+
+ find_common_params(&blob, &size);
+
+ if (blob != NULL) {
+ VbSharedDataHeader *vdat = (VbSharedDataHeader *) blob;
+ fw_index = get_active_fw_index(vdat);
+ fw_id = get_fw_id(fw_index);
+
+ if (fw_id == NULL)
+ fw_id = "NOT FOUND";
+
+ print_string("Active firmware id: ");
+ print_string(fw_id);
+
+ switch (fw_index) {
+ case VDAT_RW_A:
+ print_string(" (RW A)\n");
+ break;
+ case VDAT_RW_B:
+ print_string(" (RW A)\n");
+ break;
+ case VDAT_RO:
+ print_string(" (RO)\n");
+ break;
+ default:
+ print_string(" (UNKNOWN)\n");
+ break;
+ }
+ }
break;
case VB_SCREEN_DEVELOPER_EGG:
- msg = "easter egg";
+ video_console_clear();
+ print_on_center("Free as in Freedom!");
break;
case VB_SCREEN_RECOVERY_REMOVE:
- msg = "remove inserted devices";
+ video_console_clear();
+ print_on_center(
+ "Please remove any external media before accessing "
+ "recovery screen.");
break;
case VB_SCREEN_RECOVERY_INSERT:
- msg = "insert recovery image";
- break;
case VB_SCREEN_RECOVERY_NO_GOOD:
- msg = "insert image invalid";
+ video_console_clear();
+ print_string(
+ "Welcome to recovery mode!\n\n"
+ "Useful key combinations:\n"
+ "- Ctrl + D: Enable developer mode (if possible)\n\n");
+
+ if (screen_type == VB_SCREEN_RECOVERY_NO_GOOD)
+ print_on_center(
+ "Invalid recovery media, please instert a "
+ "valid one.");
+ else
+ print_on_center(
+ "Please insert an external recovery media.");
+ break;
+ case VB_SCREEN_RECOVERY_TO_DEV:
+ video_console_clear();
+ video_get_rows_cols(&rows, &cols);
+
+ video_console_set_cursor(0, 0);
+
+ print_string(
+ "Enabling developer mode will allow booting unsigned "
+ "kernels and booting from external media (when enabled "
+ "with crossystem).\n\n"
+ "Developer mode can be disabled via the developer mode "
+ "screen.");
+
+ msg = "Developer mode will be enabled.";
+ video_console_set_cursor((cols - strlen(msg)) / 2, rows / 2);
+ print_string(msg);
+
+ msg = "Press enter to confirm or escape to go back.";
+ video_console_set_cursor((cols - strlen(msg)) / 2,
+ rows / 2 + 2);
+ print_string(msg);
+ break;
+ case VB_SCREEN_DEVELOPER_TO_NORM:
+ video_console_clear();
+ video_get_rows_cols(&rows, &cols);
+
+ video_console_set_cursor(0, 0);
+
+ print_string(
+ "Disabling developer mode will restrict boot to signed "
+ "kernels stored on internal memory only.\n\n"
+ "Developer mode can be enabled again via the recovery "
+ "mode screen.");
+
+ msg = "Developer mode will be disabled.";
+ video_console_set_cursor((cols - strlen(msg)) / 2, rows / 2);
+ print_string(msg);
+
+ msg = "Press enter to confirm or escape to go back.";
+ video_console_set_cursor((cols - strlen(msg)) / 2,
+ rows / 2 + 2);
+ print_string(msg);
break;
case VB_SCREEN_WAIT:
- msg = "wait for ec update";
+ video_console_clear();
+ print_on_center("Waiting for EC update...");
+ break;
+ case VB_SCREEN_TO_NORM_CONFIRMED:
+ video_console_clear();
+ print_on_center("Disabling developer mode.");
break;
default:
printf("Not a valid screen type: %d.\n", screen_type);
return VBERROR_INVALID_SCREEN_INDEX;
}
- if (msg)
- print_on_center(msg);
-
return VBERROR_SUCCESS;
}
--
1.9.1
