Does VxWorks come with a built in Boot loader?
if not then which boot loader should be used to boot it?
VxWorks does have a bootloader aka bootrom which comes with each BSP and can be customized if necessary, see the vxworks kernel programmer's guide for more information.
Related
I have successfully shared a GPU-based OpenGL context with OpenCL (using CL_CONTEXT_PROPERTY_USE_CGL_SHAREGROUP_APPLE when creating the OpenCL context).
However if the OpenGL context is software-based (created with kCGLPFARendererID, kCGLRendererGenericFloatID), then OpenCL context creation failed with error CL_INVALID_DEVICE (-33).
Is it possible to group-share a CPU-based OpenCL context with a CPU based OpenGL context?
If so, how?
I think this is a SDK/ Driver specific problem. So you should try to ask this question in a developer forum of the hardware you are trying to use.
For example you can register without problems at this page for amd related stuff:
http://devgurus.amd.com/welcome
There you get answers also from AMD interal developers like driver developer. I think they could tell you if it is possible or not.
For the Intel side of live you should try this place:
http://software.intel.com/de-de/forums/intel-opencl-sdk
But there i can't tell you how likely the internal developers try to answer.
I am looking at developing a simple (to start with) UEFI Boot loader to load a ELF image, and was wondering if anyone had a good entry point into maybe any existing projects, or examples that I can use to get started out with.
In addition I was wondering if any one had any experience in getting virtual box to run an EFI application. I have set up a VM with EFI mother board but can seam to create an EFI System Partition for it to load out of (without using an OS), all I can achieve is the UEFI command line.
You might try taking a look at the GRUB or elilo source code. These are also good because they support loading ELF images. You might also look to the EDK2, there is a lot of good code there, and it's easy to build EFI executable images with it.
When referencing the UEFI, I also like to use Phoenix's wiki. I find the boot services entry to be especially useful.
Hope this helps at least a little!
I recently became interested in bootloaders too. I'm still a newbie in this field, but I found this interesting step-by-step tutorial to code a "Hello World" bootloader. Hope it gives you or anyone else with the same question a starting point for developing your bootloader.
GRUB installation on UEFI is possible by means of grub-mkimage. ELF binaries are known to be similarly masqueraded as complying UEFI's PE32+ requirement. If some C developers will refactor the code as done by https://www.kernel.org/doc/Documentation/efi-stub.txt and then generalize mkimage's that code as a separate tool for the sake of multibooters without PE32+ kernel loaders for every OS...
Just imagine
ld -b input-format -o <output>.efi --oformat=output-format objfile ...
I am asking here because I have no idea where to find any information about this problem. If you could recommend me a book or an article about it, I would be pleased.
Where can I find any information about correlation between Linux kernel and GLIBC's version? I know that, the kernel itself contains implementation of libc's functions, but I do not know, how they are delivered to it.
For example:
Recently I had to build the kernel for an old PowerPC processor. It came with libc's dynamic library files in version 2.3.6 out-of-the-box. In /lib/ path there are files with names like librt.so-2.3.6.
What is the simplest way to update this lib to a newer version?
Is it possible to configure kernel's build system to make it generating uImage file with a newer GLIBC version or an alternative one (ex. EGLIBC)?
There is little correlation, the same kernel should work with a wide range of glibc versions, and viceversa. The library finds out what the kernel handles, and uses that. For the gory details of what has changed in glibc (this is what you interact with, including support for new kernel features), you should look at the upstream changelog. For new features in the Linux kernel, perhaps the best source are the periodical "What's new in..." articles the kernel section of LWN
I have an application written on embedded device which is running on OpenGL ES 2.0. I want to debug issues with the application using PC . Currently My PC is running Ubuntu 11.04 and it doesnt have any Graphics card.
For the purpose of debugging , I want to have any software based OpenGL ES2.0 libraries. Is there any such libraries preset? If so can any one provide me a link?
Thanks
You have emulator from ARM AMD and Imagination Technologies to run opengl es 2.0 on windows/ubuntu.
I suggest going with Imagination technologies one.
here is the link http://www.imgtec.com/powervr/insider/sdkdownloads/index.asp
I wanna port Linux kernel 2.6.x to new MIPS board. Unfortunatelly, I can't find good actual documentation with step by step explaination. Hope, you'll help me. Paper books are OK too.
Thank you in advance!
First, get your hands on a MIPS toolchain. You're going to need it to compile the kernel. I've used buildroot a few times, including for building a MIPS toolchain.
But buildroot offers a lot more than just that:
Buildroot can generate any or all of a
cross-compilation toolchain, a root
filesystem, a kernel image and a
bootloader image. Buildroot is useful
mainly for people working with small
or embedded systems, using various CPU
architectures (x86, ARM, MIPS,
PowerPC, etc.) : it automates the
building process of your embedded
system and eases the cross-compilation
process.
If you would like to do this process manually, I suggest you take a look at this. It's not for MIPS but it shows the generic formula (you'll probably have to find and apply MIPS patches to the Kernel before compiling it). Try buildroot, it does all of this automagically!
I must also recommend reading Jun Sun's Linux MIPS Porting Guide.