0x00400104处的MIPS运行时异常：提取地址在字边界0x10010011上未对齐

如何解决0x00400104处的MIPS运行时异常：提取地址在字边界0x10010011上未对齐

为什么我会看到错误消息：

/home/test_task3.asm第96行错误：运行时异常位于0x00400104：提取地址未在字边界0x10010011上对齐

错误代码行是：

get_minimum：lw $ t0,0（$ a0）

源代码为：

           .data
newline_str:.asciiz "\n"
prompt_len: .asciiz "Array length: "
prompt_num: .asciiz "Enter num: "
min_str:   .asciiz "The minimum element in this list is "
size: .word 0
i:           .word    0

           .text
main:       # Copy $sp to $fp
           addi $fp,$sp,0

           # Alloc 4 bytes for local variable my_list
           addi $sp,-4

           # Prompt for the array length
addi $v0,$0,4
la $a0,prompt_len
           syscall

           # Read the array length
           addi $v0,5
           syscall
           sw $v0,size

           # Create the array based on the array length
           addi $v0,9
           lw $t0,size
           addi $t0,$t0,1
           sll $a0,2
           syscall
           sw $v0,-4($fp)
           lw $t0,size
           sw $t0,($v0)

sw $0,i
read_loop:   # while i < len(the_list)
           lw $t0,i               # i
           lw $t1,-4($fp)           # the_list
           lw $t1,($t1)           # len(the_list)

           slt $t0,$t1       # i < len(the_list)
           beq $t0,endfor       # if not true (not jump)

           # Prompt for "Enter number: "
           addi $v0,4
           la $a0,prompt_num
           syscall

           # Read the number
           addi $v0,5
           syscall

           # the_list[i] = int(input())
           lw $t0,-4($fp)       # &the_list
           lw $t1,i           # i
           sll $t1,$t1,2       # i *= 4
           add $t0,$t1   # &the_list + (offset)
           sw $v0,4($t0)       # skip over length

           # i = i + 1
lw $t0,i
           addi $t0,1
           sw $t0,i

           j read_loop

           # Call get_minimum(my_list)
endfor:       addi $sp,-4 # make space for 1 argument
           lw $t0,-4($fp) # load the address of the start of my_list
           sw $t0,0($sp) # store it as arg 1 of get_minimum
           jal get_minimum # call get_minimum
           addi $sp,4 # remove the argument

           addi $t0,$v0,0 # Keep track of the result

           # Print the min_str
           addi $v0,min_str
           syscall

           # Print the minimum
           addi $a0,0 # $a0 = get_minimum(my_list)
           addi $v0,1 # $v0 = 1 for printing integer
           syscall

           # print "\n"
           addi $v0,4 # $v0 = 4 for printing a string
           la $a0,newline_str # $a0 = newline_str for printing a new line
           syscall

           # Exit the program
           addi $v0,10 # $v0 = 10 for exiting the program
           syscall

get_minimum : lw $t0,0($a0) #min_item = the_list[0] here min_item is $t0
addi $a0,$a0,4 #go to next index value of list_int
li $t1,1 #i=1
lw $a1,size

for: bge $t1,$a1,return #if $t1 >= $a1 than go to return label
lw $t2,0($a0)       #load word from address $a0 into $t2
bge $t2,else
move $t0,$t2
  
else:   
addi $t1,1
addi $a0,4 #go to next pointer address
j for #jump to for label
  
  
return :
move $v0,$t0 #move min_item value($t0) to $v0 which return value
jr $ra #return address from it called in main function