invalid program counter value: 0

Question

I\'m currently working with assembly language under the MIPS processor. I\'m currently using MARS simulator and for reasons unknown I get the following error message after every

Answer 1

I am new to MIPS and I just had this problem. This is what I had:

    .data

    .text

swap:
    # do stuff
    jr  $ra

main:
    # do stuff
    jal swap
    li  $v0,10
    syscall

I fixed it by changing it to this:

    .data

    .text
main:
    # do stuff
    jal swap
    li  $v0,10
    syscall

swap:
    # do stuff
    jr  $ra

Notice I moved main to be before swap. I mistakenly assumed that main was a reserved label. And that it would automatically jump straight to main first. But apparently that isn't the case because it was hitting my jr $ra instruction before I got to call jal swap in main.

Anyway, I hope this helps.