mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-12-24 15:28:10 +00:00
96 lines
2.3 KiB
C
96 lines
2.3 KiB
C
/*
|
|
* This file is part of the TREZOR project, https://trezor.io/
|
|
*
|
|
* Copyright (C) 2017 Saleem Rashid <trezor@saleemrashid.com>
|
|
*
|
|
* This library is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Lesser General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This library 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 Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public License
|
|
* along with this library. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <sys/mman.h>
|
|
#include <unistd.h>
|
|
|
|
#include <libopencm3/stm32/flash.h>
|
|
|
|
#include "memory.h"
|
|
#include "oled.h"
|
|
#include "rng.h"
|
|
#include "setup.h"
|
|
#include "timer.h"
|
|
|
|
#define EMULATOR_FLASH_FILE "emulator.img"
|
|
|
|
void *emulator_flash_base = NULL;
|
|
|
|
uint32_t __stack_chk_guard;
|
|
|
|
static int urandom = -1;
|
|
|
|
static void setup_urandom(void);
|
|
static void setup_flash(void);
|
|
|
|
void setup(void) {
|
|
setup_urandom();
|
|
setup_flash();
|
|
}
|
|
|
|
void emulatorRandom(void *buffer, size_t size) {
|
|
ssize_t n = read(urandom, buffer, size);
|
|
if (n < 0 || ((size_t) n) != size) {
|
|
perror("Failed to read /dev/urandom");
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
static void setup_urandom(void) {
|
|
urandom = open("/dev/urandom", O_RDONLY);
|
|
if (urandom < 0) {
|
|
perror("Failed to open /dev/urandom");
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
static void setup_flash(void) {
|
|
int fd = open(EMULATOR_FLASH_FILE, O_RDWR | O_SYNC | O_CREAT, 0644);
|
|
if (fd < 0) {
|
|
perror("Failed to open flash emulation file");
|
|
exit(1);
|
|
}
|
|
|
|
off_t length = lseek(fd, 0, SEEK_END);
|
|
if (length < 0) {
|
|
perror("Failed to read length of flash emulation file");
|
|
exit(1);
|
|
}
|
|
|
|
emulator_flash_base = mmap(NULL, FLASH_TOTAL_SIZE, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
|
|
if (emulator_flash_base == MAP_FAILED) {
|
|
perror("Failed to map flash emulation file");
|
|
exit(1);
|
|
}
|
|
|
|
if (length < FLASH_TOTAL_SIZE) {
|
|
if (ftruncate(fd, FLASH_TOTAL_SIZE) != 0) {
|
|
perror("Failed to initialize flash emulation file");
|
|
exit(1);
|
|
}
|
|
|
|
/* Initialize the flash */
|
|
flash_erase_all_sectors(FLASH_CR_PROGRAM_X32);
|
|
}
|
|
}
|