Which one is the correct code to rturn from a non-leaf subroutine? Jmpl %i0, %g0

Question

Which one is the correct code to rturn from a non-leaf subroutine? Jmpl %i0, %g0 jmpl %i7 + 4, %g0 jmpl %i7 + 8, %g0 jmpl %07 + 4, %g0, jmpl %07 + 8, %g0 none of the above. Which one is the correct code to return from a leaf subroutine? jmpl %i0, %g0 jmpl %i7 + 4, %g0 jmpl %i7 + 8, %g0 jmpl %07 + 4, %g0, jmpl %07 + 8, %g0 none of the above. First six arguments to a subroutine are passed through %o0 - %o5 %g0 - %g5 %I0 - %o7 all of the above none of the above The call.mul instruction is same as the ret ba. mul jmpl.mul, %o7 ba.mul, %o6 jmpl.mul, %i7 ta 0 The mapped registers (in and local) are saved to the stack when the current windows pointer (CWP) = windows invalid mask(WIM). This condition is known as the windows overflow buffer overflow stack overflow open subroutine closed subroutine leaf subroutine

Explanation / Answer

1. The correct code to return from a non-leaf subroutine is jmpl %i0,%g0.

2. The correct code to return from a leaf subroutine is jmpl %07+8,%g0.

3. First six arguments to a subroutine are passed through %g0 - %g5.

4. The cal.mulinstruction is same as jmpl.mul,%i7.

5. The mapped registers are saved to the stack when the current windows pointer=windows invalid mask.

    This condition is known as the Buffer Overflow.

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