Arm/sum args

Write a function with a variable number of arguments that returns the sum of all of its arguments. The first argument n tells you how many numbers to sum. The remaining n integers are the numbers to sum. The function will be called with exactly n+1 arguments.

Return the sum of all n numbers. Overflowing a 32-bit register should wrap around (i.e., no special handling).

int sum (int n, ... );

Expected solution length: Around 15 lines.

Sample Input

sum(2, 1, 2)

Sample Output

.global _start
_start:
	ldr sp, =0x40000000	// Initial sp
	mov r0, #2
	mov r1, #1
	mov r2, #2
	
	bl sum
	1: b 1b  // done

.global sum
sum:

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Arm/sum args

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Sample Output

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