run.sh

#!/bin/bash
set -xue

QEMU=qemu-system-riscv32
OBJCOPY=/opt/homebrew/opt/llvm/bin/llvm-objcopy

# Path to clang and compiler flags
CC=/opt/homebrew/opt/llvm/bin/clang  # Ubuntu users: use CC=clang
CFLAGS="-std=c11 -O2 -g3 -Wall -Wextra --target=riscv32-unknown-elf -fuse-ld=lld -fno-stack-protector -ffreestanding -nostdlib"

# Build the shell (application)
$CC $CFLAGS -Wl,-Tuser.ld -Wl,-Map=shell.map -o shell.elf shell.c user.c common.c
$OBJCOPY --set-section-flags .bss=alloc,contents -O binary shell.elf shell.bin
$OBJCOPY -Ibinary -Oelf32-littleriscv shell.bin shell.bin.o

# Build the kernel
$CC $CFLAGS -Wl,-Tkernel.ld -Wl,-Map=kernel.map -o kernel.elf \
    kernel.c common.c shell.bin.o

# Start QEMU
$QEMU -machine virt -bios default -nographic -serial mon:stdio --no-reboot \
    -kernel kernel.elf