3.md

例程1：hello world!

hello.s

	.file	"hello.c"
	.option nopic
	.attribute arch, "rv64i2p0_m2p0_a2p0_f2p0_d2p0_c2p0"
	.attribute unaligned_access, 0
	.attribute stack_align, 16
	.text
	.section	.rodata
	.align	3
.LC0:
	.string	"Hello, world!"
	.text
	.align	1
	.globl	main
	.type	main, @function
main:
	addi	sp,sp,-16
	sd	ra,8(sp)
	sd	s0,0(sp)
	addi	s0,sp,16
	lui	a5,%hi(.LC0)
	addi	a0,a5,%lo(.LC0)
	call	puts
	li	a5,0
	mv	a0,a5
	ld	ra,8(sp)
	ld	s0,0(sp)
	addi	sp,sp,16
	jr	ra
	.size	main, .-main
	.ident	"GCC: (GNU) 10.2.0"

riscv64-unknown-elf-gcc编译

$RISCV/newlib/bin/riscv64-unknown-elf-g++ hello.s -o hello

clang++编译（可选）

$RISCV/llvm/bin/clang --target=riscv64-unknown-elf -march=rv64gc --sysroot=$RISCV/newlib/riscv64-unknown-elf --gcc-toolchain=$RISCV/newlib hello.s -o hello

可以看到生成了hello 可执行程序。

qemu运行

$RISCV/qemu/bin/qemu-riscv64 hello

spike运行（可选）

$RISCV/newlib/bin/spike $RISCV/newlib/riscv64-unknown-elf/bin/pk hello

恭喜，至此，已经成功运行了你的第一个RISC-V程序！

---

• 调试