.text
  .global _start			// void _start() { ... }
  .type   _start, @function

_start:

	# Initialize global pointer
.option push
.option norelax
setgp:	
	auipc gp,%pcrel_hi(__global_pointer$)
	addi  gp,gp, %pcrel_lo(setgp)
.option pop

	# Clear the bss segment (starting at __bss_start and ending at __BSS_END__-1)

	// a0 = __bss_start
	lui		a0,%hi(__bss_start)
	addi	a0,a0,%lo(__bss_start)

	// a1 = _end
	lui		a1,%hi(__BSS_END__)
	addi	a1,a1,%lo(__BSS_END__)

clear_bss:
    bgeu    a0,a1,done_bss      # while (!(a0 >= a1)) {
    sb      x0,0(a0)            #   *a0 = 0;
    addi    a0,a0,1             #   ++a0
    beq     x0,x0,clear_bss		# }
done_bss:   

	ebreak

	.size  _start, .-_start