diff --git a/common/droidboot_platform_common.c b/common/droidboot_platform_common.c
index 290e0e3..676c0d4 100644
--- a/common/droidboot_platform_common.c
+++ b/common/droidboot_platform_common.c
@@ -5,12 +5,12 @@ void droidboot_fb_flush(lv_disp_drv_t * disp_drv, const lv_area_t * area, lv_col
     droidboot_internal_fb_flush(disp_drv, area, color_p);
 }
 
-int droidboot_get_display_height()
+lv_coord_t droidboot_get_display_height()
 {
     return droidboot_internal_get_display_height();
 }
 
-int droidboot_get_display_width()
+lv_coord_t droidboot_get_display_width()
 {
     return droidboot_internal_get_display_width();
 }
@@ -98,12 +98,12 @@ void droidboot_delay(unsigned int time)
     droidboot_internal_delay(time);
 }
 
-void droidboot_platform_boot_linux_from_ram(void *kernel_raw, off_t kernel_raw_size, void *ramdisk_raw, off_t ramdisk_size, void *dtb_raw, off_t dtb_raw_size, void *dtbo_raw, off_t dtbo_raw_size, char *options)
+void droidboot_platform_boot_linux_from_ram(void *kernel_raw, uint64_t kernel_raw_size, void *ramdisk_raw, uint64_t ramdisk_size, void *dtb_raw, uint64_t dtb_raw_size, void *dtbo_raw, uint64_t dtbo_raw_size, char *options)
 {
     droidboot_internal_boot_linux_from_ram(kernel_raw, kernel_raw_size, ramdisk_raw, ramdisk_size, dtb_raw, dtb_raw_size, dtbo_raw, dtbo_raw_size, options);
 }
 
-void droidboot_pre_ramdisk_load(void *kernel_raw, off_t kernel_raw_size)
+void droidboot_pre_ramdisk_load(void *kernel_raw, uint64_t kernel_raw_size)
 {
     droidboot_internal_pre_ramdisk_load(kernel_raw, kernel_raw_size);
 }
diff --git a/common/droidboot_platform_common.h b/common/droidboot_platform_common.h
index 77f233a..86beb93 100644
--- a/common/droidboot_platform_common.h
+++ b/common/droidboot_platform_common.h
@@ -45,8 +45,8 @@
 #endif
 
 void droidboot_fb_flush(lv_disp_drv_t * disp_drv, const lv_area_t * area, lv_color_t * color_p);
-int droidboot_get_display_height();
-int droidboot_get_display_width();
+lv_coord_t droidboot_get_display_height();
+lv_coord_t droidboot_get_display_width();
 void droidboot_key_read(lv_indev_drv_t * drv, lv_indev_data_t*data);
 
 int droidboot_platform_settings_dev_open(struct ext4_blockdev *bdev);
@@ -69,8 +69,8 @@ void droidboot_platform_system_log(const char *buf);
 
 void droidboot_delay(unsigned int time);
 
-void droidboot_platform_boot_linux_from_ram(void *kernel_raw, off_t kernel_raw_size, void *ramdisk_raw, off_t ramdisk_size, void *dtb_raw, off_t dtb_raw_size, void *dtbo_raw, off_t dtbo_raw_size, char *options);
-void droidboot_pre_ramdisk_load(void *kernel_raw, off_t kernel_raw_size);
+void droidboot_platform_boot_linux_from_ram(void *kernel_raw, uint64_t kernel_raw_size, void *ramdisk_raw, uint64_t ramdisk_size, void *dtb_raw, uint64_t dtb_raw_size, void *dtbo_raw, uint64_t dtbo_raw_size, char *options);
+void droidboot_pre_ramdisk_load(void *kernel_raw, uint64_t kernel_raw_size);
 void *droidboot_get_kernel_load_addr(void);
 void *droidboot_get_ramdisk_load_addr(void);
 bool droidboot_append_ramdisk_to_kernel(void);
diff --git a/simulator/simulator.c b/simulator/simulator.c
index 0390e52..02de3e5 100644
--- a/simulator/simulator.c
+++ b/simulator/simulator.c
@@ -13,15 +13,15 @@ static bool s_simulator_running;
 uint8_t s_simulator_keymask;
 static JavaVM* s_simulator_jvm;
 static jobject s_simulator_bitmap, s_simulator_thiz;
-static jint s_simulator_h, s_simulator_w;
+static lv_coord_t s_simulator_h, s_simulator_w;
 extern int droidboot_exit;
 
-int droidboot_internal_get_display_height()
+lv_coord_t droidboot_internal_get_display_height()
 {
 	return s_simulator_h;
 }
 
-int droidboot_internal_get_display_width()
+lv_coord_t droidboot_internal_get_display_width()
 {
 	return s_simulator_w;
 }
@@ -33,13 +33,13 @@ JNIEXPORT void simulator_stop(JNIEnv* env)
 	droidboot_exit = 0;
 }
 
-JNIEXPORT void simulator_start(JNIEnv* env, jobject thiz, jobject bitmap, jint w, jint h)
+__attribute__((unused)) JNIEXPORT void simulator_start(JNIEnv* env, jobject thiz, jobject bitmap, jint w, jint h)
 {
 	(*env)->GetJavaVM(env, &s_simulator_jvm);
 	s_simulator_bitmap = (*env)->NewGlobalRef(env, bitmap);
 	s_simulator_thiz = (*env)->NewGlobalRef(env, thiz);
-	s_simulator_h = h;
-	s_simulator_w = w;
+	s_simulator_h = (lv_coord_t)h;
+	s_simulator_w = (lv_coord_t)w;
 	droidboot_init();
 	droidboot_show_dualboot_menu();
 	simulator_stop(env);
@@ -78,7 +78,7 @@ void droidboot_internal_fb_flush(lv_disp_drv_t * disp_drv, const lv_area_t * are
 		//__android_log_print(ANDROID_LOG_VERBOSE, "droidboot", "locked fb %p", addr);
 		for (uint32_t y = area->y1; y <= area->y2; y++) {
 			for (uint32_t x = area->x1; x <= area->x2; x++) {
-				addr[(y*s_simulator_w)+x] = 0xff << 24 | color_p->ch.blue << 16 | color_p->ch.green << 8 | color_p->ch.red;
+				addr[(y*s_simulator_w)+x] = 0xffU << 24 | color_p->ch.blue << 16 | color_p->ch.green << 8 | color_p->ch.red;
 				color_p++;
 			}
 		}
@@ -261,12 +261,12 @@ void droidboot_internal_delay(unsigned int time)
 	usleep(time*1000);
 }
 
-void droidboot_internal_boot_linux_from_ram(void *kernel_raw, off_t kernel_raw_size, void *ramdisk_raw, off_t ramdisk_size, void *dtb_raw, off_t dtb_raw_size, void *dtbo_raw, off_t dtbo_raw_size, char *options)
+void droidboot_internal_boot_linux_from_ram(void *kernel_raw, uint64_t kernel_raw_size, void *ramdisk_raw, uint64_t ramdisk_size, void *dtb_raw, uint64_t dtb_raw_size, void *dtbo_raw, uint64_t dtbo_raw_size, char *options)
 {
 	// nothing happens
 }
 
-void droidboot_internal_pre_ramdisk_load(void *kernel_raw, off_t kernel_raw_size)
+void droidboot_internal_pre_ramdisk_load(void *kernel_raw, uint64_t kernel_raw_size)
 {
 	// nothing happens
 }
diff --git a/simulator/simulator.h b/simulator/simulator.h
index 6d0d2ff..f5c8740 100644
--- a/simulator/simulator.h
+++ b/simulator/simulator.h
@@ -9,8 +9,8 @@
 #include "droidboot_error.h"
 
 void droidboot_internal_fb_flush(lv_disp_drv_t * disp_drv, const lv_area_t * area, lv_color_t * color_p);
-int droidboot_internal_get_display_height();
-int droidboot_internal_get_display_width();
+lv_coord_t droidboot_internal_get_display_height();
+lv_coord_t droidboot_internal_get_display_width();
 void droidboot_internal_key_read(lv_indev_drv_t * drv, lv_indev_data_t*data);
 droidboot_error droidboot_internal_platform_init();
 ssize_t dridboot_internal_sd_read_block(void *buf, uint32_t block, uint count);
@@ -24,8 +24,8 @@ void droidboot_internal_lvgl_threads_init();
 void droidboot_internal_platform_on_screen_log(const char *buf);
 void droidboot_internal_platform_system_log(const char *buf);
 void droidboot_internal_delay(unsigned int time);
-void droidboot_internal_boot_linux_from_ram(void *kernel_raw, off_t kernel_raw_size, void *ramdisk_raw, off_t ramdisk_size, void *dtb_raw, off_t dtb_raw_size, void *dtbo_raw, off_t dtbo_raw_size, char *options);
-void droidboot_internal_pre_ramdisk_load(void *kernel_raw, off_t kernel_raw_size);
+void droidboot_internal_boot_linux_from_ram(void *kernel_raw, uint64_t kernel_raw_size, void *ramdisk_raw, uint64_t ramdisk_size, void *dtb_raw, uint64_t dtb_raw_size, void *dtbo_raw, uint64_t dtbo_raw_size, char *options);
+void droidboot_internal_pre_ramdisk_load(void *kernel_raw, uint64_t kernel_raw_size);
 void *droidboot_internal_get_kernel_load_addr();
 void *droidboot_internal_get_ramdisk_load_addr();
 void *droidboot_internal_get_dtb_load_addr();