Skip to content

Instantly share code, notes, and snippets.

View mischief's full-sized avatar
🐡
hack the planet

Nick Owens mischief

🐡
hack the planet
262 followers · 325 following
View GitHub Profile
@mischief
mischief / notes.md
Created February 13, 2026 07:17
notes for lua on openbsd

cqueues does not really like libressl, so

env ALL_LDFLAGS="$(pkg-config --libs eopenssl36) -Wl,-rpath=/usr/local/lib/eopenssl36" \
   luarocks install --local --force cqueues OPENSSL_INCDIR=/usr/local/include/eopenssl36/

to force openssl from packages. cqueues goofy makefile doesn't look at LDFLAGS.

for added fun, http rock

env ALL_LDFLAGS="$(pkg-config --libs eopenssl36) -Wl,-rpath=/usr/local/lib/eopenssl36" \

@yaneti
yaneti / gist:653c880ef732ab04bc65ee1fc6bfaa9f
Last active December 30, 2025 17:18
Milk-V Megrez bootchain build steps
# build u-boot
git clone -b rockos-dev https://github.com/rockos-riscv/rockos-u-boot
pushd rockos-u-boot
make eic7700_milkv_megrez_defconfig
make
popd
# produce a combined opensbi+u-boot payload
git clone -b rockos-dev https://github.com/rockos-riscv/rockos-opensbi
cd rockos-opensbi
@ganboing
ganboing / eic7700_firmware.md
Last active December 3, 2025 12:05

EIC7700 firmware (bootchain)

First off, EIC7700 has several CPUs. MCPU (P550 cluster) + SCPU (E21) + LCPU (E21) + NPU and DSPs. The SCPU (Secure CPU) is used to run the Masked ROM after power on. The Masked ROM has the logic of loading different payloads from the selected boot source image and kickstarts other CPUs such as MCPU. Optionally it can also validate the cryptographic key/signature of the payload against OTP, thus implementing secure-boot. ESWIN calls the container of the payloads bootchain By default the boot source is QSPI boot flash. The bootchain is stored at the beginning of the flash (offset 0). The boot flash contains the following on my Hifive P550

  • DDR init: Vendor binary blob to initialize DDR (closed source)
  • "firmware": AFAIK, a very small piece of code that does little to nothing. Perhaps only to keep SCPU active.
  • bootloader: The usual opensbi+u-boot stuff that runs on MCPU. (open source, ESWIN maintains the patched opensbi/u-boot)

*As it's shown, the DDR init blob i

@desnudopenguino
desnudopenguino / vultr_openbsd.tf
Last active November 4, 2017 08:53
A sample config to set up openbsd on vultr
// Configure the Vultr provider.·
// Alternatively, export the API key as an environment variable: `export VULTR_API_KEY=<your-vultr-api-key>`.
provider "vultr" {
api_key = "<api key>"
}
// Find the ID of the Silicon Valley region.
data "vultr_region" "seattle" {
filter {
name = "name"
@lyda
lyda / metrics.lua
Last active December 10, 2025 06:48
Prometheus node-exporter in lua for openwrt
#!/usr/bin/lua
-- Metrics web server (0.1)
-- Copyright (c) 2015 Kevin Lyda
-- Apache 2.0 License
socket = require("socket")
netsubstat = {"IcmpMsg", "Icmp", "IpExt", "Ip", "TcpExt", "Tcp", "UdpLite", "Udp"}
cpu_mode = {"user", "nice", "system", "idle", "iowait", "irq",
"softirq", "steal", "guest", "guest_nice"}
netdevsubstat = {"receive_bytes", "receive_packets", "receive_errs",
@marineam
marineam / gist:9914debc25c8d7dc458f
Last active May 21, 2018 12:47
CoreOS dev container

Pending real documentation.... We do have a development container which includes the same toolchain version that was used to build CoreOS but it works under systemd-nspawn, not docker, and isn't documented. But here is a quick guide that may be a useful starting place.

# on coreos
wget http://alpha.release.core-os.net/amd64-usr/current/coreos_developer_container.bin.bz2
bunzip2 coreos_developer_container.bin.bz2
sudo systemd-nspawn -i coreos_developer_container.bin --share-system
@gnusosa
gnusosa / gist:9ad456ef25a748693980
Created March 9, 2015 22:16
# These settings were set by the catalyst build script that automatically
# built this stage.
# Please consult /usr/share/portage/config/make.conf.example for a more
# detailed example.
CFLAGS="-march=corei7 -O2 -pipe"
CXXFLAGS="${CFLAGS}"
# WARNING: Changing your CHOST is not something that should be done lightly.
# Please consult http://www.gentoo.org/doc/en/change-chost.xml before changing.
CHOST="x86_64-pc-linux-gnu"
# These are the USE flags that were used in addition to what is provided by the
@uebayasi
uebayasi / openbsd-cross-build-tips.md
Last active December 15, 2025 17:46

Basic

  • Don't try "unprivileged" build from start.
    • First do cross-dirs/cross-tools/cross-distrib as root (sudo).
    • Then change owner/mode of obj directories. This will make development easier.
  • Always use cross build (for development).
    • Otherwise you'll overwrite your /usr/include during build.
    • Cross build can't make release on OpenBSD, unfortunately (because of gnu/, where Makefile.bsd-wrapper is used). So cross build is only for development.
@enukane
enukane / gist:3551798
Created August 31, 2012 11:45
ethervirtio.c : virtio-net for 9front, able to send ping, receive dhcp but dead when received more than 255 frames
#include "u.h"
#include "../port/lib.h"
#include "mem.h"
#include "dat.h"
#include "fns.h"
#include "io.h"
#include "ureg.h"
#include "../port/error.h"
#include "../port/netif.h"
@vmihailenco
vmihailenco / proxy.go
Created November 20, 2011 15:22
Simple TCP proxy in Golang
package main
import (
"bytes"
"encoding/hex"
"flag"
"fmt"
"io"
"log"
"net"