Answer:
Yes, but since much of the code is not from your program single stepping is less interesting.
Yes, but since much of the code is not from your program single stepping is less interesting.
Here is SPIM with the example "hello.asm" program. When an exception file is loaded along with your program (when the Load exception file setting is checked), SPIM loads some initialization code starting at address 0x400000, and loads some data starting at 0x10000000. So now you no longer know exactly where your code and data are in memory, so you must use symbolic addresses in your code.
For example, in previous chapters you could set up a base register
to point at your data by doing something like this:
lui $10,0x1000.
This will no longer work, since you data does not start at 0x10000000.
Instead, do something like this
la $s0,mydata
to use $s0 as a base.
What happens if the program were slightly modified, as follows:
main:
li $v0,4 # code 4 == print string
la $a0,string # $a0 == address of the string
addiu $a0,1 # add one to the address
syscall # Invoke the operating system.
. . .
.data
string: .asciiz "Hello SPIM!\n"