From:

  riscv64-linux-gnu-gcc -S -march=rv32im -mabi=ilp32 -ffreestanding -fno-pic -nostdlib foo.c

===

	.file	"foo.c"
	.option nopic
	.text
	.align	2
	.globl	main
	.type	main, @function
main:
	addi	sp,sp,-16
	sw	ra,12(sp)
	sw	s0,8(sp)
	addi	s0,sp,16
	call	start
	nop
	mv	a0,a5
	lw	ra,12(sp)
	lw	s0,8(sp)
	addi	sp,sp,16
	jr	ra
	.size	main, .-main
	.ident	"GCC: (Debian 8.3.0-2) 8.3.0"