fix(core): remove unnecessary exit handlers

[no changelog]

Author: cepetr

core/embed/io/display/unix/display_driver.c

@@ -98,10 +98,6 @@ static display_driver_t g_display_driver = {
 int sdl_display_res_x = DISPLAY_RESX, sdl_display_res_y = DISPLAY_RESY;
 int sdl_touch_offset_x, sdl_touch_offset_y;
 
-static void display_exit_handler(void) {
-  display_deinit(DISPLAY_RESET_CONTENT);
-}
-
 bool display_init(display_content_mode_t mode) {
   display_driver_t *drv = &g_display_driver;
 
@@ -113,7 +109,6 @@ bool display_init(display_content_mode_t mode) {
     printf("%s\n", SDL_GetError());
     error_shutdown("SDL_Init error");
   }
-  atexit(display_exit_handler);
 
   char *window_title = NULL;
   char *window_title_alloc = NULL;

core/embed/io/sdcard/inc/io/sdcard.h

@@ -54,6 +54,9 @@
 #ifdef KERNEL_MODE
 
 void sdcard_init(void);
+
+void sdcard_deinit(void);
+
 secbool __wur sdcard_power_on_unchecked(bool low_speed);
 
 #endif

core/embed/io/sdcard/unix/sdcard.c

@@ -39,12 +39,6 @@
 static uint8_t *sdcard_buffer = NULL;
 static secbool sdcard_powered = secfalse;
 
-static void sdcard_exit(void) {
-  int r = munmap(sdcard_buffer, SDCARD_SIZE);
-  ensure(sectrue * (r == 0), "munmap failed");
-  sdcard_buffer = NULL;
-}
-
 void sdcard_init(void) {
   if (sdcard_buffer != NULL) {
     return;
@@ -81,8 +75,12 @@ void sdcard_init(void) {
   }
 
   sdcard_powered = secfalse;
+}
 
-  atexit(sdcard_exit);
+void sdcard_deinit(void) {
+  int r = munmap(sdcard_buffer, SDCARD_SIZE);
+  ensure(sectrue * (r == 0), "munmap failed");
+  sdcard_buffer = NULL;
 }
 
 secbool sdcard_is_present(void) { return sectrue; }

core/embed/util/flash/inc/util/flash.h

@@ -30,6 +30,8 @@
 
 void flash_init(void);
 
+void flash_deinit(void);
+
 extern const flash_area_t BOARDLOADER_AREA;
 extern const flash_area_t SECRET_AREA;
 extern const flash_area_t BHK_AREA;

core/embed/util/flash/unix/flash.c

@@ -82,11 +82,6 @@ static uint32_t FLASH_SECTOR_TABLE[FLASH_SECTOR_COUNT + 1] = {
 static uint8_t *FLASH_BUFFER = NULL;
 static uint32_t FLASH_SIZE;
 
-static void flash_exit(void) {
-  int r = munmap(FLASH_BUFFER, FLASH_SIZE);
-  ensure(sectrue * (r == 0), "munmap failed");
-}
-
 void flash_init(void) {
   if (FLASH_BUFFER) return;
 
@@ -126,8 +121,11 @@ void flash_init(void) {
   ensure(sectrue * (map != MAP_FAILED), "mmap failed");
 
   FLASH_BUFFER = (uint8_t *)map;
+}
 
-  atexit(flash_exit);
+void flash_deinit(void) {
+  int r = munmap(FLASH_BUFFER, FLASH_SIZE);
+  ensure(sectrue * (r == 0), "munmap failed");
 }
 
 secbool flash_unlock_write(void) { return sectrue; }