build: golden 保底固件布局——LD ORIGIN 0x0800B000 (B 槽 19K-8B) + VECT_TAB_OFFSET 0xB000

LD/gd32e23x_flash.ld

@@ -10,9 +10,11 @@ _Min_Heap_Size = 0x200; /* required amount of heap */
 _Min_Stack_Size = 0x400; /* required amount of stack */
 
 /* Memories definition */
+/* FW_B 保底槽布局：0x0800B000~0x0800FC00 共 19K，末 8B（0x0800FBF8 起）为 B 记录
+ * {magic16,pages16,crc16,2B 保留}，由打包工具写入，链接区上限 = 槽 - 8B = 0x4BF8 */
 MEMORY
 {
-    FLASH (rx)  : ORIGIN = 0x08002000, LENGTH = 54K
+    FLASH (rx)  : ORIGIN = 0x0800B000, LENGTH = 0x4BF8
     RAM (xrw)   : ORIGIN = 0x20000000, LENGTH = 8K
 }
 

Src/system_gd32e23x.c

@@ -41,7 +41,7 @@
 #define __HXTAL           (HXTAL_VALUE)            /* high speed crystal oscillator frequency */
 #define __SYS_OSC_CLK     (__IRC8M)                /* main oscillator frequency */
 
-#define VECT_TAB_OFFSET  (uint32_t)0x2000           /* vector table base offset */
+#define VECT_TAB_OFFSET  (uint32_t)0xB000           /* vector table base offset, FW_B slot 0x0800B000 */
 
 /* select a system clock by uncommenting the following line */
 //#define __SYSTEM_CLOCK_8M_HXTAL              (__HXTAL)