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trezor-firmware/core/embed/lib/rsod.c

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/*
* This file is part of the Trezor project, https://trezor.io/
*
* Copyright (c) SatoshiLabs
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "rsod.h"
#include "bootutils.h"
#include "display.h"
#include "mini_printf.h"
#include "system.h"
#include "terminal.h"
#define RSOD_DEFAULT_TITLE "INTERNAL ERROR";
#define RSOD_DEFAULT_MESSAGE "UNSPECIFIED";
#define RSOD_DEFAULT_FOOTER "PLEASE VISIT TREZOR.IO/RSOD";
#define RSOD_EXIT_MESSAGE "EXIT %d"
#ifdef KERNEL_MODE
#define RSOD_FG_COLOR COLOR_WHITE
#ifdef USE_RGB_COLORS
#define RSOD_BG_COLOR RGB16(0x7F, 0x00, 0x00)
#else
#define RSOD_BG_COLOR COLOR_BLACK
#endif
void rsod_terminal(const systask_postmortem_t* pminfo) {
display_orientation(0);
term_set_color(RSOD_FG_COLOR, RSOD_BG_COLOR);
const char* title = RSOD_DEFAULT_TITLE;
const char* message = RSOD_DEFAULT_MESSAGE;
const char* footer = RSOD_DEFAULT_FOOTER;
const char* file = NULL;
char message_buf[32] = {0};
int line = 0;
switch (pminfo->reason) {
case TASK_TERM_REASON_EXIT:
mini_snprintf(message_buf, sizeof(message_buf), RSOD_EXIT_MESSAGE,
pminfo->exit.code);
message = message_buf;
break;
case TASK_TERM_REASON_ERROR:
title = pminfo->error.title;
message = pminfo->error.message;
footer = pminfo->error.footer;
break;
case TASK_TERM_REASON_FATAL:
message = pminfo->fatal.expr;
file = pminfo->fatal.file;
line = pminfo->fatal.line;
break;
case TASK_TERM_REASON_FAULT:
message = system_fault_message(&pminfo->fault);
break;
}
if (title != NULL) {
term_printf("%s\n", title);
}
if (message != NULL) {
term_printf("msg : %s\n", message);
}
if (file) {
term_printf("file: %s:%d\n", file, line);
}
#ifdef SCM_REVISION
const uint8_t* rev = (const uint8_t*)SCM_REVISION;
term_printf("rev : %02x%02x%02x%02x%02x\n", rev[0], rev[1], rev[2], rev[3],
rev[4]);
#endif
if (footer != NULL) {
term_printf("\n%s\n", footer);
}
display_backlight(255);
}
#endif // KERNEL_MODE
#ifdef FANCY_FATAL_ERROR
#include "rust_ui.h"
void rsod_gui(const systask_postmortem_t* pminfo) {
const char* title = RSOD_DEFAULT_TITLE;
const char* message = RSOD_DEFAULT_MESSAGE;
const char* footer = RSOD_DEFAULT_FOOTER;
char message_buf[128] = {0};
switch (pminfo->reason) {
case TASK_TERM_REASON_EXIT:
mini_snprintf(message_buf, sizeof(message_buf), RSOD_EXIT_MESSAGE,
pminfo->exit.code);
message = message_buf;
break;
case TASK_TERM_REASON_ERROR:
title = pminfo->error.title;
message = pminfo->error.message;
footer = pminfo->error.footer;
break;
case TASK_TERM_REASON_FATAL:
message = pminfo->fatal.expr;
if (message[0] == '\0') {
mini_snprintf(message_buf, sizeof(message_buf), "%s:%u",
pminfo->fatal.file, (unsigned int)pminfo->fatal.line);
message = message_buf;
}
break;
case TASK_TERM_REASON_FAULT:
message = system_fault_message(&pminfo->fault);
break;
}
// Render the RSOD in Rust
display_rsod_rust(title, message, footer);
}
#endif // FANCY_FATAL_ERROR
#ifdef KERNEL_MODE
// Initializes system in emergency mode and shows RSOD
static void init_and_show_rsod(const systask_postmortem_t* pminfo) {
// Initialize the system's core services
// (If the kernel crashes in emergency mode, we are out of options
// and show the RSOD without attempting to re-enter emergency mode)
system_init(&rsod_terminal);
// Initialize necessary drivers
display_init(DISPLAY_RESET_CONTENT);
#ifdef FANCY_FATAL_ERROR
// Show the RSOD using Rust GUI
rsod_gui(pminfo);
#else
// Show the RSOD using terminal
rsod_terminal(pminfo);
#endif
// Wait for the user to manually power off the device
secure_shutdown();
}
// Universal panic handler
// (may be called from interrupt context)
void rsod_panic_handler(const systask_postmortem_t* pminfo) {
// Since the system state is unreliable, enter emergency mode
// and show the RSOD.
system_emergency_rescue(&init_and_show_rsod, pminfo);
// The previous function call never returns
}
#endif // KERNEL_MODE