I am making a simple operating system kernel and want to emulate it using bochs. Currently, I am using qemu as my emulator but want to switch over to bochs. I have downloaded and installed bochs in ubuntu but couldn't figure out a way to use it? Can anybody help me with that ? Any links or some way to get me started would be really helpful.
I needed the following .bochsrc run a minimal boot sector:
ata0-master: type=disk, path="main.img", mode=flat,
cylinders=1, heads=1, spt=1
boot: disk
display_library: sdl
megs: 128
More details at: https://stackoverflow.com/a/32871939/895245
Related
I'm trying to go through the example at the below webpage:
https://github.com/KhronosGroup/OpenCL-Guide/blob/main/chapters/getting_started_linux.md
I know this example is for Ubuntu, but I used RHEL 8 and installed opencl-headers and ocl-icd-devel packages so it compiled fine, but I got
[19:25]ec2-user#ec2lm-0e2cec915$ ./HelloOpenCL
clGetPlatformIDs(-1001)
Anyone know what this code means? Could it be because I'm missing other drivers for openCL to interact with my CPU or GPU?
I am using ubuntu 18.04 on wsl 1. I have installed podman. After pulling the image when tried to run it got the following error unable to write pod event "write unixgram #00044->/run/systemd/journal/socket: sendmsg: no such file or directory"
and cannot create a new network namespace: "permission denied"
How to solve this issue?
Short answer: Container systems like Docker and Podman that manipulate namespaces and cgroups will not run on WSL1. You'll need WSL2 in order to run Podman.
More Detail:
While WSL1 is great at running many types of Linux binaries, it does so by acting as a "translation layer", mapping Linux kernel syscalls to the rough equivalent in the Windows kernel. However, it does not provide a real Linux kernel, and its abilities do not include the namespace support needed for containers.
You'll definitely need WSL2, which runs in a VM with a real Linux kernel, in order to use Podman, or any other Linux container technology.
I'm fairly new to Linux kernel development. It is certainly quite a bit different than the Windows kernel (I am a recovering Microsoft engineer). Can you provide advice on how to iterate effectively on updating modules that come with the Linux kernel?
Specifically, I am updating hid and bcm5974 to support the latest Macbook Pro (early 2015), and am using Ubuntu 15.04 (kernel 3.19). Would you recommend I test it out in a Virtual Machine? Are there ways to incrementally build instead of clean + build the whole tree? I'd love to be able to build just the affected modules but I can't find a good way to do that. The Makefiles are rather complicated.
Time to answer my own question. After doing a full build, incrementals are pretty straightforward given you're not editing headers that are consumed by other modules.
make modules SUBDIRS=drivers/input/mouse
Once I've installed the kernel from the full build, iterating on new module compilations is a breeze. sudo rmmod bcm5974. scp file from build desktop to Macbook Pro. sudo insmod bcm5974.
Can a new machine type be added for qemu-system-arm -M <MachineType> without having to recompile qemu or write code? Are there docs to do this? I would like to be able to emulate raspberry pi and pandaboard using qemu.
I know that meego's fork of qemu supports pandaboard, but I am trying to stick with the main stream qemu that I can manage from the apt-get package manager. the main stream qemu now supports beagleboard rev C and beagleboard xm that were previously supported only in the meego fork.
without having to recompile qemu or write code?
No. There must be some code doing the device specific emulation, like for example the way the Raspberry Pi or the Pandaboard implement video output. This is not a matter of just a few config files.
I've been able to emulate the Pi with -M versatilepb: https://raspberrypi.stackexchange.com/questions/165/emulation-on-a-linux-pc/53991#53991 and -M raspi2 has was later added in QEMU 2.6.
Maybe this feature is feasible to implement, see my experience with adding a new platform device: How to add a new device in QEMU source code?
There, I only needed to add a single line to attach a new device to versatilepb:
sysbus_create_simple("lkmc_platform_device", 0x101e9000, pic[18]);
so maybe we could have a config file containing lines of type:
type name regid irq
sysbus lkmc_platform_device 0x101e9000 18
Related: out-of-tree devices: How to create out-of-tree QEMU devices?
HI i am using freeBSD as my operating system.I have apache version 2.2.16 installed on it.I want to make this dtrace enabled.How can i do this.Thanks in advance
For enabling dtrace on Freebsd one can follow this link.
Ive tried it its working.
http://prefetch.net/projects/apache_modtrace/index.html
One things just in build instruction dont use the mapfile.Just skip it.By doing this the build will be successful