CH32V307启动文件长跳转根本不起作用怎么解决？

这边需要写一个IAP,于是在ld文件里面把项目的FLASH起始地址往后挪了0x4000


MEMORY
{
BOOTFLASH ( rx ) : ORIGIN = 0x00000000 , LENGTH = 16K
FLASH ( rx ) : ORIGIN = 0x00004000 , LENGTH = 176K
RAM ( xrw ) : ORIGIN = 0x20000000 , LENGTH = 128K
}


SECtiONS
{
.bootapp :
{
_sbootappinit = . ;
. = ALIGN (4);
KEEP(*(SORT_NONE ( .bootapp )))
. = ALIGN (4);
_ebootappinit = . ;
} > BOOTFLASH AT > BOOTFLASH


.init :
{
_sinit = . ;
. = ALIGN (4);
KEEP(*(SORT_NONE ( .init )))
. = ALIGN (4);
_einit = . ;
} > FLASH AT > FLASH
为了方便调试,在前面塞了个bootFLASH段,写了个新的s文件.在BOOTFLASH段,里面只有一个j指令,跳到原本的地址:

.section .bootapp, "ax" ,@progbits
.global _boot
.align 1
_boot :
j _start
.word 0x00000013
.word 0x00000013
.word 0x00000013
.word 0x00000013
.word 0x00000013
.word 0x00000013
.word 0x00000013
.word 0x00000013
.word 0x00000013
.word 0x00000013
.word 0x00000013
.word 0x00000013
.word 0x00100073
但是实际调试发现,这个跳转根本不起作用,单步调试发现跳到了莫名其妙的地方去了.


改成
li a6 , 0x4000
jr a6
也一样的效果