ARM BootLoader 基本流程

參考程式碼

ResetEntry
 b SYS_RST_HANDLER
 b UDF_INS_HANDLER
 b SWI_SVC_HANDLER
 b INS_ABT_HANDLER
 b DAT_ABT_HANDLER
 b .
 b IRQ_SVC_HANDLER
 b FIQ_SVC_HANDLER
SWI_SVC_HANDLER
 stmfd sp!, {r0-r12, lr}
        ldr         r0,[lr,#-4]
 ldr r1, =SWI_SVC_VECTOR
 mov lr, pc
 ldr pc, [r1]
 ldmfd sp!, {r0-r12, pc}^
MAP _ISR_STARTADDRESS ;0xcffff00
SYS_RST_VECTOR # 4 
UDF_INS_VECTOR # 4 
SWI_SVC_VECTOR # 4
    IMPORT SWI_SERVICE
     ldr r0, =SWI_SVC_VECTOR
     ldr r1, =SWI_SERVICE
     str r1, [r0]


void SWI_SERVICE(int type)
{
     switch(type)
     case 0:
     case 1:
}

main()
{
 __asm{   SWI 0x1   }
}

來源：http://cuijinbird.blogchina.com/cuijinbird/1733878.html