The execution of the instruction BL label2 involves two steps: The address of th

Question

The execution of the instruction BL label2 involves two steps: The address of the next instruction is stored in the Stack Pointer SP, and PC =-Iable2 The address of the next instruction is stored in the PC, and SP = Iable2 The address of live next instruction is stored in the Link Register LR, and SV -lable2 The address of the next instruction is stored in the Link Register LR. and VC = lable2 Which register should be preserved before using nested subroutine PC SP LR RI Which registers are used to pass parameters into a subroutine R3, R4, R5, and R6 R0, R1, R2, and R3 R0, R1, R4, and R6 R7, R8, R9, andR10

Explanation / Answer

5)Link Rigister (LR) is preserved for nested subroutine and it holds the return address after the execution of subroutine

6)Registers R0,R1,R2 and R3 are used for the parameters passing to subroutine and R0 holds the return value from the subroutine

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