--- sdk/build/bk7231_ota.ld	2021-08-16 11:59:34.000000000 -0500
+++ ../sdk/build/bk7231_ota.ld	2023-07-10 17:35:30.075799603 -0500
@@ -37,6 +37,7 @@
 OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
 OUTPUT_ARCH(arm)
 ENTRY(_vector_start);
+_bootloader_world_flag = 0x00400000;
 _vector_start = ORIGIN(flash);
 
 SECTIONS
@@ -121,4 +122,4 @@
    libc.a
    libm.a
    libnosys.a
- )
\ No newline at end of file
+ )