====== Riscv - how to use prinf from assembler ====

The following link explains how to setup and run RiscV Debian in qemu on Linux in order to complete the assembler task below:-

[[https://www.codeproject.com/Tips/5383029/Run-Debian-RISC-V-In-QEMU-Virtual-Environment-For]]

This link was so useful, I have reproduced it here for future reference:- [[RiscV-Qemu-Debian]]

All work has been carried out using Ubuntu as the host for qemu which then runs Riscv Debian .

assemble with:
as test2.s -o test2.o

then compile with:
gcc test2.o -o test2

run with:
./test2

{{:screenshot_from_2025-02-03_15-34-32.png?400|}}

<file asm test2.s>
.section .rodata
prompt: .asciz "Value of t0 = %ld and value of t1 = %ld\n"
.globl main
.section .text
main:
    addi    sp, sp, -8
    sd      ra, 0(sp)
    la      a0, prompt
    li      t0,44
    li      t1,88
    mv      a1, t0
    mv      a2, t1
    call    printf
    ld      ra, 0(sp)
    addi    sp, sp, 8
    ret

</file>

== interesting links ==


[[https://fraserinnovations.com/risc-v/risc-v-instruction-set-explanation/]]

[[https://www.riscvschool.com/2022/04/28/risc-v-assembly-tutorial/]]

[[https://opentitan.org/book/doc/contributing/style_guides/asm_coding_style.html]]

[[https://mcyoung.xyz/2021/11/29/assembly-1/]]

[[https://operating-system-in-1000-lines.vercel.app/en/04-boot]]

[[https://riscvasm.lucasteske.dev/#]]  online emulator

[[https://godbolt.org/]]    online emulator