diff options
| -rw-r--r-- | .bashrc | 4 | ||||
| -rwxr-xr-x | bin/run-riscv-qemu.sh | 28 |
2 files changed, 27 insertions, 5 deletions
@@ -168,6 +168,10 @@ if [ "$(uname -m)" != "riscv64" ]; then export CROSS_COMPILE=riscv64-suse-linux- fi +# I have built a local busybox so I can generate an initramfs for various +# hacking thingies, let's reference it into an environment variable. +export BUSYBOX_SRC="$HOME/src/busybox/1.36.1" + ## # Lastly I had some problems with the GPG agent recently. So I copied a solution # from https://github.com/jessfraz/dotfiles diff --git a/bin/run-riscv-qemu.sh b/bin/run-riscv-qemu.sh index 6b9aaa9..94310c5 100755 --- a/bin/run-riscv-qemu.sh +++ b/bin/run-riscv-qemu.sh @@ -1,12 +1,20 @@ -#!/usr/bin/env sh +#!/usr/bin/env bash set -e +# Enfore the BUSYBOX_SRC path. +if [ -z "$BUSYBOX_SRC" ]; then + echo "run-qemu (error): you need to define BUSYBOX_SRC." + exit 1 +fi + CORES=${CORES:-4} EXTRA=${EXTRA:-} REPO=${REPO:-riscv} KERNEL=${KERNEL:-~/src/git.kernel.org/linux/kernel/$REPO/arch/riscv/boot/Image} -INITRD=${INITRD:-~/src/busybox/1.36.1/initramfs.cpio.gz} + +# Cleanup older environments. +rm -rf "$BUSYBOX_SRC/initramfs/home" while [[ $# -gt 0 ]]; do case $1 in @@ -23,7 +31,8 @@ while [[ $# -gt 0 ]]; do exit 1 ;; *) - echo "run-qemu (warning): argument '$1' will be ignored." + mkdir -p "$BUSYBOX_SRC/initramfs/home/$(whoami)" + cp "$1" "$BUSYBOX_SRC/initramfs/home/$(whoami)/" shift # past argument ;; esac @@ -43,17 +52,26 @@ Environment variables that can be used the further configure the run: - CORES: number of cores (i.e. argument for '-smp'). Default: 4. - EXTRA: extra arguments to pass. Default: (empty). - - INITRD: the initial ramdisk for the run (e.g. argument for '-initrd'). Default: "$INITRD". - KERNEL: the kernel to be passed (i.e. argument for '-kernel'). Default: "$KERNEL". - REPO: the Linux repository to be used. Default: "riscv". HERE exit 0 fi +## +# Generate the initramfs. + +pushd "$BUSYBOX_SRC/initramfs" +find . -print0 | cpio --null -o --format=newc | gzip -9 >../initramfs.cpio.gz +popd + +## +# Actual run. + qemu-system-riscv64 -machine virt -nographic \ -smp "$CORES" \ -kernel "$KERNEL" \ - -initrd "$INITRD" \ + -initrd "$BUSYBOX_SRC/initramfs.cpio.gz" \ -append "root=/dev/ram" \ -append nokaslr \ -append ftrace_dump_on_oops \ |