sdutil FAT formatting, libfat fix memcpy overflow, generate linker .map files for user apps

libfat/Makefile

@@ -2,6 +2,7 @@ include ../make/ufuncs.mk
 
 $(eval $(call add_include,libsystem))
 $(eval $(call add_include,libstring))
+$(eval $(call add_include,libaux))
 
 cflags += -D"FAT_PRINTF(a)"
 

libfat/libfat.c

@@ -1,6 +1,7 @@
 #include <devices.h>
 #include <fs_types.h>
 #include <libfat.h>
+#include <minmax.h>
 #include <status.h>
 #include <stddef.h>
 #include <stdint.h>
@@ -69,7 +70,7 @@ static int fat_diskio_write (struct fatfs_ctx* ctx, uint32_t sector, uint8_t* bu
 
 int fat_format_drive (struct fatfs_ctx* ctx, const char* device_key, int fs_type) {
   memset (ctx, 0, sizeof (*ctx));
-  memcpy (ctx->device_name, device_key, sizeof (ctx->device_name) - 1);
+  memcpy (ctx->device_name, device_key, min (sizeof (ctx->device_name) - 1, strlen (device_key)));
 
   size_t total_size = 0;
   device_do (device_key, XDRV_GET_SIZE, &total_size, NULL, NULL, NULL);