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Discussion on: How to build xv6-riscv on mac

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Tingwei •

Here is a RISC-V "Hello World" example

Step 1: write rv-hello.s


.global _start                                                                                      

_start: addi  a0, x0, 1
        la    a1, helloworld
        addi  a2, x0, 13
        addi  a7, x0, 64
        ecall

        addi    a0, x0, 0
        addi    a7, x0, 93
        ecall

.data
helloworld:      .ascii “Hello World!\n”
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Step2: assemble rv-hello.s and link

riscv64-unknown-elf-gcc -o rv-hello rv-hello.s -nostdlib -static
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Step3: run the program

riscv64-unknown-elf-run rv-hello
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// Hello World!