debug.sh

#!/bin/bash
set -e

OUT="$1"

if [ -z "$OUT" ]; then
	echo "Usage: $0 <program.elf>"
	exit 1
fi

if [ ! -f "$OUT" ]; then
    echo "[-] Error: File $OUT does not exist"
    exit 1
fi

pkill -f "qemu-riscv64.*1235" 2>/dev/null && echo "[+] Killed existing QEMU" || echo "[-] No QEMU to kill"
sleep 2

while ss -ln | grep -q ":1235 "; do
    echo "[+] Waiting for port 1235 to be free..."
    sleep 1
done

echo "[+] Starting QEMU in debug mode..."
qemu-riscv64 -g 1235 "$OUT" &
QEMU_PID=$!

echo "[+] Waiting for QEMU to be ready..."
sleep 3

cleanup() {
    echo "[+] Cleaning up QEMU..."
    kill $QEMU_PID 2>/dev/null || true
}

trap cleanup EXIT INT TERM

echo "[+] Connecting GDB..."
gdb-multiarch \
    -ex "set architecture riscv:rv64" \
    -ex "file $OUT" \
    -ex "target remote localhost:1235" \
    -ex "tui enable" \
    -ex "layout regs" \
    -ex "break main" \
    -ex "continue"

echo "[+] GDB session ended"