initial

FIRMWARE/hello.S

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+# Hello world !
+	
+.section .text
+.globl main
+
+main:
+.L0:
+	la   a0, hello
+	call putstring
+	j .L0
+
+putstring:
+	addi sp,sp,-4 # save ra on the stack
+	sw ra,0(sp)   # (need to do that for functions that call functions)
+	mv t2,a0	
+.L1:    lbu a0,0(t2)
+	beqz a0,.L2
+	call putchar
+	addi t2,t2,1	
+	j .L1
+.L2:    lw ra,0(sp)  # restore ra
+	addi sp,sp,4 # restore sp
+	ret
+
+.section .data
+hello:
+	.asciz "Hello, world !\n"