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Moritz Systems is a proud contributor and member of the BSD community, with a primary focus on the NetBSD technology. NetBSD is a free, fast, secure and highly portable Operating System, available for a wide range of platforms, from large-scale servers and powerful desktop computers to IOT and Edge Computing devices. We believe that all users of Open Source should have the freedom of choice between alternative solutions and that is why we provide BSD licensed software services to our customers.

Blog | July 5, 2022

Full multiprocess support in lldb-server

By Michał Górny

Moritz Systems have been contracted by the FreeBSD Foundation to continue our work on modernizing the LLDB debugger’s support for FreeBSD. The primary goal of our contract is to bring support for full multiprocess debugging into LLDB. The Project Schedule is divided into three milestones, each taking approximately one and a half months: Support for the non-stop variant of GDB Remote Serial Protocol in lldb-server and gdb-remote plugin in LLDB client.

Blog | May 31, 2022

Implementing non-stop protocol compatibility in LLDB

By Michał Górny

Moritz Systems have been contracted by the FreeBSD Foundation to continue our work on modernizing the LLDB debugger’s support for FreeBSD. The primary goal of our contract is to bring support for full multiprocess debugging into LLDB. The Project Schedule is divided into three milestones, each taking approximately one and a half months: Support for the non-stop variant of GDB Remote Serial Protocol in lldb-server and gdb-remote plugin in LLDB client.

Blog | January 20, 2022

LLDB FreeBSD kernel debugging support summary

By Michał Górny

Moritz Systems have been contracted by the FreeBSD Foundation to continue our work on modernizing the LLDB debugger’s support for FreeBSD. The primary goal of our contract is to bring kernel debugging into LLDB. The complete Project Schedule is divided into six milestones, each taking approximately one month: Improve LLDB compatibility with the GDB protocol: fix LLDB implementation errors, implement missing packets, except registers. Improve LLDB compatibility with the GDB protocol: support gdb-style flexible register API.

Blog | January 7, 2022

LLDB FreeBSD live kernel debugging support

By Michał Górny

Moritz Systems have been contracted by the FreeBSD Foundation to continue our work on modernizing the LLDB debugger’s support for FreeBSD. The primary goal of our contract is to bring kernel debugging into LLDB. The complete Project Schedule is divided into six milestones, each taking approximately one month: Improve LLDB compatibility with the GDB protocol: fix LLDB implementation errors, implement missing packets, except registers. Improve LLDB compatibility with the GDB protocol: support gdb-style flexible register API.

Blog | December 6, 2021

LLDB FreeBSD kernel core dump support

By Michał Górny

Moritz Systems have been contracted by the FreeBSD Foundation to continue our work on modernizing the LLDB debugger’s support for FreeBSD. The primary goal of our contract is to bring kernel debugging into LLDB. The complete Project Schedule is divided into six milestones, each taking approximately one month: Improve LLDB compatibility with the GDB protocol: fix LLDB implementation errors, implement missing packets, except registers. Improve LLDB compatibility with the GDB protocol: support gdb-style flexible register API.

Blog | October 27, 2021

LLDB serial port communication support

By Michał Górny

Moritz Systems have been contracted by the FreeBSD Foundation to continue our work on modernizing the LLDB debugger’s support for FreeBSD. The primary goal of our contract is to bring kernel debugging into LLDB. The complete Project Schedule is divided into six milestones, each taking approximately one month: Improve LLDB compatibility with the GDB protocol: fix LLDB implementation errors, implement missing packets, except registers. Improve LLDB compatibility with the GDB protocol: support gdb-style flexible register API.

Blog | September 21, 2021

Improving GDB register model compatibility in LLDB

By Michał Górny

Moritz Systems have been contracted by the FreeBSD Foundation to continue our work on modernizing the LLDB debugger’s support for FreeBSD. The primary goal of our contract is to bring kernel debugging into LLDB. The complete Project Schedule is divided into six milestones, each taking approximately one month: Improve LLDB compatibility with the GDB protocol: fix LLDB implementation errors, implement missing packets, except registers. Improve LLDB compatibility with the GDB protocol: support gdb-style flexible register API.

Blog | August 19, 2021

Improving GDB protocol compatibility in LLDB

By Michał Górny

Moritz Systems have been contracted by the FreeBSD Foundation to continue our work on modernizing the LLDB debugger’s support for FreeBSD. The primary goal of our contract is to bring kernel debugging into LLDB. The complete Project Schedule is divided into six milestones, each taking approximately one month: Improve LLDB compatibility with the GDB protocol: fix LLDB implementation errors, implement missing packets, except registers. Improve LLDB compatibility with the GDB protocol: support gdb-style flexible register API.

Blog | July 19, 2021

FreeBSD KGDB support in LLDB

The Moritz Systems team has started a new contract on FreeBSD KGDB support in LLDB.

Blog | May 6, 2021

LLDB core dump support improvements

By Michał Górny

Moritz Systems have been contracted by the FreeBSD Foundation to continue our work on modernizing the LLDB debugger’s support for FreeBSD. The complete Project Schedule is divided into four milestones, each taking approximately one month: M1 Switch all the non-x86 CPUs to the LLDB FreeBSD Remote-Process-Plugin. M2 Iteration over regression tests on ARM64 and fixing known bugs, marking the non-trivial ones for future work. Remove the old local-only Process-Plugin.

Blog | April 15, 2021

LLDB support for fork(2) and vfork(2)

By Michał Górny

Moritz Systems have been contracted by the FreeBSD Foundation to continue our work on modernizing the LLDB debugger’s support for FreeBSD. The complete Project Schedule is divided into four milestones, each taking approximately one month: M1 Switch all the non-x86 CPUs to the LLDB FreeBSD Remote-Process-Plugin. M2 Iteration over regression tests on ARM64 and fixing known bugs, marking the non-trivial ones for future work. Remove the old local-only Process-Plugin.

Blog | March 4, 2021

LLDB: FreeBSD Legacy Process Plugin Removed

By Michał Górny

Moritz Systems have been contracted by the FreeBSD Foundation to continue our work on modernizing the LLDB debugger’s support for FreeBSD. The complete Project Schedule is divided into four milestones, each taking approximately one month: M1 Switch all the non-x86 CPUs to the LLDB FreeBSD Remote-Process-Plugin. M2 Iteration over regression tests on ARM64 and fixing known bugs, marking the non-trivial ones for future work. Remove the old local-only Process-Plugin.

Blog | February 4, 2021

FreeBSD Remote Process Plugin on Non-x86 Architectures

By Michał Górny

Moritz Systems have started a new contract with the FreeBSD Foundation to continue our work on modernizing the LLDB debugger’s support for FreeBSD. Throughout the previous contract we have introduced a FreeBSD Remote Process Plugin utilizing the mode modern client-server layout of LLDB. We have managed to achieve the feature parity with the original FreeBSD plugin on the x86 architecture. However, as of today other architectures still use the original.

Blog | January 28, 2021

LLDB FreeBSD CPU target support and userland debugging improvements

The Moritz Systems team has started a new contract on LLDB FreeBSD CPU target support and userland debugging improvements.

Bsd tips and tricks | January 25, 2021

leave(1) - remind you when you have to leave

By Kamil Rytarowski

leave +0001

Bsd tips and tricks | January 5, 2021

Add a new user

By Kamil Rytarowski

useradd -m joe && passwd joe

Blog | December 10, 2020

FreeBSD Remote Process Plugin: Final Milestone Achieved

By Kamil Rytarowski, Michał Górny

Moritz Systems have been contracted by the FreeBSD Foundation to modernize the LLDB debugger’s support for FreeBSD. We are working on a new plugin utilizing the more modern client-server layout that is already used by Darwin, Linux, NetBSD and (unofficially) OpenBSD. The new plugin is going to gradually replace the legacy one. This dragon image is owned by Apple Inc. The Project Schedule was divided into three milestones, each taking approximately one month:

Bsd tips and tricks | December 7, 2020

Set your favorite pager

By Kamil Rytarowski

env PAGER=less man 1 intro

Bsd tips and tricks | November 30, 2020

finger(1) plan

By Kamil Rytarowski

echo “Rule the world!” > ~/.plan

Blog | November 26, 2020

Mastering UNIX pipes, Part 1

By Kamil Rytarowski

A pipe is a first-in-first-out interprocess communication channel. The pipe version as it is known today was invented by an American Computer Scientist Douglas McIlroy and incorporated into Version 3 AT&T UNIX in 1973 by Ken Thompson. It was inspired by the observation that frequently the output of one application is used as an input for another. This concept can be reused to connect a chain of processes. This is frequently observed in UNIX shell constructs that utilize the | operator.

Bsd tips and tricks | November 23, 2020

Show diff output in color

By Kamil Rytarowski

alias cpatch=‘sed -e “s/^+.$/tput setf 6 bold&tput sgr0/” -e “s/^-.$/tput setf 4 bold&tput sgr0/"’

Bsd tips and tricks | November 16, 2020

Emulate clear in restricted environments

By Kamil Rytarowski

alias clr=‘printf “\033[H\033[J”’

Bsd tips and tricks | November 9, 2020

Find the largest files in the current directory

By Kamil Rytarowski

find . -type f -exec stat -f "%z %N" {} \; | sort -r -n -k1

Blog | November 5, 2020

FreeBSD Remote Process Plugin is now the default in LLDB

By Michał Górny, Kamil Rytarowski

Moritz Systems have been contracted by the FreeBSD Foundation to modernize the LLDB debugger’s support for FreeBSD. We are working on a new plugin utilizing the more modern client-server layout that is already used by Darwin, Linux, NetBSD and (unofficially) OpenBSD. The new plugin is going to gradually replace the legacy one. The Project Schedule is divided into three milestones, each taking approximately one month: M1 Introduce new FreeBSD Remote Process Plugin for x86_64 with basic support and upstream to LLVM.

Blog | October 29, 2020

How Debuggers Work: Getting and Setting x86 Registers, Part 2: XSAVE

By Michał Górny

In the previous part of this article, I have described the basic methods of getting and setting the baseline registers of 32-bit and 64-bit x86 CPUs. I have covered General Purpose Registers, baseline Floating-Point Registers and Debug Registers along with their ptrace(2) interface. In the second part, I would like to discuss the XSAVE family of instructions. I will describe the different variants of this instruction as well as explain the differences between them and their limitations.

Blog | October 22, 2020

How Debuggers Work: Getting and Setting x86 Registers, Part 1

By Michał Górny

In this article, I would like to shortly describe the methods used to dump and restore the different kinds of registers on 32-bit and 64-bit x86 CPUs. The first part will focus on General Purpose Registers, Debug Registers and Floating-Point Registers up to the XMM registers provided by the SSE extension. I will explain how their values can be obtained via the ptrace(2) interface.

Blog | October 8, 2020

Introduction of a new FreeBSD Remote Process Plugin in LLDB

By Michał Górny, Kamil Rytarowski

Moritz Systems have been contracted by the FreeBSD Foundation to modernize the LLDB debugger’s support for FreeBSD. We are writing a new plugin utilizing the more modern client-server layout that is already used by Darwin, Linux, NetBSD and (unofficially) OpenBSD. The new plugin is going to gradually replace the legacy one. The LLVM project provides a modern, modular, permissively licensed compiler infrastructure. A toolchain including Clang compiler, LLD linker and LLDB debugger is being developed as a part of it.

Blog | September 30, 2020

LLDB Debugger Improvements for FreeBSD

By Kamil Rytarowski

The Moritz Systems team has started a new contract on improving the LLDB support for FreeBSD. The LLDB project builds on libraries provided by LLVM and Clang to provide a great modern debugger. It uses the Clang ASTs and expression parser, LLVM JIT, LLVM disassembler, etc so that it provides an experience that “just works”. It is also blazing fast and more permissively licensed than GDB, the GNU Debugger.