Arm/strlen

Write a function named strlen that returns the length of a null-terminated string. The string (a pointer to an array of characters) will be passed as the first argument of the function. A string contains non-null characters and ends with a single byte with value 0. The string must not be modified.

Return (in r0) the length of the string, which excludes the null termination character;

unsigned int strlen (const char *string);

Expected solution length: Around 10 lines.

Sample Input

"Hello World"

Sample Output

.data
MyString: .string "Hello World"

.text
.global _start
_start:
    ldr r0, =MyString
    bl strlen
    1: b 1b

.global strlen
strlen:

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