. Write a C callable assembler function that counts the number of characters in a string. The function should work for any string and character. The address of the string and character to be counted are passed as arguments according to the C function prototype: int count (char *string, char c); Since there are input arguments, your assembly function should use a stack frame. It should return the count to the calling C program in %eax. Use 32-bit quantities for all data.

.data
    str: .string "hello"
    char: .byte 'o'
    len: .long 5

    .text
    .globl count
    count: pushl %ebp
    movl %esp, %ebp
    movl 8(%ebp), %eax

    movl 12(%ebp), %edx
    movl (%eax), %ecx
    movl 4(%ebp), %ebx

    loop:
    cmpl $0, %ecx
    je done
    movb (%edx), %al
    cmpl %al, (%ebx)
    je increment
    addl $1, %edx
    subl $1, %ecx
    jmp loop
    increment:
    addl $1, %edx
    addl $1, %ecx
    incl %eax
    jmp loop

    done:
    movl %ebp, %esp
    popl %ebp
    ret