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Load function in assembly

W twh

If I have the address of particular function, is it possible load the function in assembly?

I understand that usually the function is loaded as

LCALL _function

but I was wondering whether it is possible to load the function with its address?

Appreciate anyone who can offer me advise on this. Thank you.

Parents
  • 0 in reply to Graham Cole

    Basicly, the return address and the function pointer are loaded onto the stack and then a RET instruction causes the CPU to pop the address of the function pointer into the PC.

    That technique has no excuse being used on the 8051, which has a perfectly fine "computed goto" instruction:

           JMP @A+DPTR

    There are platforms where indeed you need such stack hacks to do a computed jump, but the 8051 is, fortunately, not one of them.

Reply
  • 0 in reply to Graham Cole

    Basicly, the return address and the function pointer are loaded onto the stack and then a RET instruction causes the CPU to pop the address of the function pointer into the PC.

    That technique has no excuse being used on the 8051, which has a perfectly fine "computed goto" instruction:

           JMP @A+DPTR

    There are platforms where indeed you need such stack hacks to do a computed jump, but the 8051 is, fortunately, not one of them.

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