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Problem jumping execution to absolute address

Mac Mohan

Hi,
I have two hex files loaded in 0x00000000 (app A) and 0x00004000 (app B)

I am using the following code to jump to app B.

((void (*)(void))0x00004000)();


Before it was working but now i rewrote app B using ARTX and now it doesn't jump to app B. If i using following code in the app A's startup.s then it jumps:

Reset_Handler:
         LDR     R0,=0x00003f00
        LDR     R1,=ISPMARK
        CMP     R0,R1
         LDRNE   PC,APP_B  ;0x00004000

how can i make a jump from C code? What am i missing?

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