mischief

obsd-gpt: boot a native OpenBSD partition in a libvirt VM

These scripts let a Linux host boot a VM from an OpenBSD install on a partition of the host disk. You can also boot the same install on bare metal.

OpenBSD writes its disklabel inside a GPT partition of type A600. The partition offsets in the disklabel count from the start of the physical disk, not from the start of the GPT partition. The kernel also checks that the disklabel partitions are inside the bounds of the A600 GPT

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C dispatch hardening

Pin the origin of dispatch targets in C language runtimes. Object tables and method pointers come only from frozen sections of the loaded ELF files, never from the heap. The idea is similar to OpenBSD pinsyscalls, applied to indirect calls instead of syscall instructions.

This document has the design, deployment shapes that need no new calls from the caller, a prototype library with tests, Coccinelle

mischief

llama.cpp on the SpacemiT K3 Pico-ITX (RISC-V) — Reproduction Guide

Tested 2026-07-11 on: SpacemiT K3 pico-ITX, 32GB RAM SKU, Bianbu 4.0.1 (Resolute Raccoon), kernel 6.18.3, GCC 15.2. 16 cores (8× perf @2.2GHz, 8× @1.8GHz). End result: Qwen3-30B-A3B MoE served at ~38 tok/s prompt processing / ~8-11 tok/s generation, CPU-only, via the SpacemiT IME (integrated matrix engine) instructions.

TL;DR

mischief

local unistd = require("posix.unistd")
local stdlib = require("posix.stdlib")
local wait = require("posix.sys.wait")

local topcmd = nil

local Cmd = {}

function Cmd:exec()
	local cmds = {}

mischief

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" \

mischief

diff --git a/usr.sbin/vmd/vm.c b/usr.sbin/vmd/vm.c
index 6d571ce90fc..141ecdb80a7 100644
--- a/usr.sbin/vmd/vm.c
+++ b/usr.sbin/vmd/vm.c
@@ -42,8 +42,6 @@
 #include "virtio.h"
 #include "vmd.h"

-#define MMIO_NOTYET 0
-

mischief

diff --git a/fuse/host_cgo.go b/fuse/host_cgo.go
index b957917..682d239 100644
--- a/fuse/host_cgo.go
+++ b/fuse/host_cgo.go
@@ -190,7 +190,7 @@ static void *cgofuse_init_fuse(void)
 #elif defined(__NetBSD__)
        h = dlopen("librefuse.so.2", RTLD_NOW);
 #elif defined(__OpenBSD__)
-       h = dlopen("libfuse.so.2.0", RTLD_NOW);
+       h = dlopen("libfuse.so", RTLD_NOW);

mischief

#include <sys/param.h> /* MIN */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <stddef.h>
#include <errno.h>
#include <assert.h>

mischief

sifive p550 ubuntu works on megrez mostly

https://github.com/sifiveinc/hifive-premier-p550-ubuntu/releases/tag/2025.04.00

- missing wifi fw
- audio driver seems broken, untested

mischief

local ffi = require("ffi")
local io = require("io")
local bit = require("bit")

ffi.cdef[[

typedef unsigned char u_char;
typedef unsigned char u_int8_t;
typedef uint32_t u_int32_t;
typedef uint64_t u_int64_t;