mboot | Tool for Intel OSIP header Android image format
kandi X-RAY | mboot Summary
kandi X-RAY | mboot Summary
Tool for Intel OSIP header Android image format
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QUESTION
@MichaelPetch has rewritten the entire question to reduce it to a specific problem that should be easily reproduced. The original question focussed on a problem encountered doing OS development in 64-bit long mode. The code was attempting to use 8042 PS/2 controller to reboot a machine but it failed to work on QEMU, although it did work in BOCHS. The original code can be found in this Github project.
Michael determined that the problem was not long mode specific. The problem space was substantially reduced to better illustrate the core issue.
For this demonstration I am:
- Using GRUB Multiboot2 specification to boot a 32-bit kernel.
- Use the 8042 PS/2 controller to reboot the machine via the Keyboard.
- Creating an ELF executable and place it in an ISO image so it can be boot as a CDROM.
- Assuming for this code that the target machine/environment supports rebooting via the 8042 PS/2 controller
The code for this demonstration is as follows:
bootloader.asm:
...ANSWER
Answered 2020-May-21 at 21:54The original Operating System code required effort to determine the root cause of this problem. The example makes it easier for people to potentially spot the culprit. Finding this problem in the original code took some effort.
The primary problem is that you have placed the Multiboot section (with the Multiboot2 header) at Virtual Memory Address (VMA) 0x500 in the linker script with this:
QUESTION
I'm trying to learn how a kernel works while I learn assembly, and in the duty of learning how to successfully create a bootable x86_64 kernel, I had a problem:
I tried to successfully output some text with functions in "main.c" (all the files below) by using the VGA buffer in 0xB8000
, the same way that I did with the 32 bits version of the kernel prototype, but the difference is that the start files are different.
The problem here is that when I use the exact same functions for the 32 bits version, it successfully prints to the screen, but when using the new files to reach the long mode (multiboot.S
and start.S
) this doesn't happen, the screen just go black when testing in qemu and after a few seconds it crashes with the error message:
ANSWER
Answered 2018-Mar-17 at 23:40QEMU doesn't support ELF64 executables when using the -kernel
parameter. You will need to boot your kernel with a multiboot2 compatible loader like GRUB2 . Unfortunately you will also need to change your multiboot header to be multiboot2 compliant. You can replace your multiboot.S
file to be:
QUESTION
I'm using the below code to bootstrap a confidence interval for a median, which works just fine.
...ANSWER
Answered 2018-Mar-19 at 15:09You just have to multiply data
by weight
and do bootstrap on the product.
QUESTION
First of all, this question is related to the creation of embedded Operating System and, to be exact, with Linux Kernel + u-boot + FSBL + device tree + FS compiled to run on an arm A9.
Context:
After booting this (just created) OS upon a Zynq device (specifically, a Pynq Board), the Uart gives these messages:
...ANSWER
Answered 2018-Feb-01 at 11:59Refer link, if zynq_artyz7_defconfig
used for your pynq board yes, look into the makefile depending on what command you give to build, also you need to look CONFIG_SPL_FS_LOAD_PAYLOAD_NAME in include/configs/zynq-common.h
QUESTION
Don't know how the transaction doesn't work, I will struggle for a long time, tried a variety of solutions, found that is not being dynamic proxy, so @Transactional
didn't work
And then do a complete copy for UserService
to UserService2
ANSWER
Answered 2017-Feb-07 at 13:46Are you sure UserService
and UserService2
have exactly the same annotations on them?
Your UserService2
class is indeed proxied, so I'd just delete UserService and rename the UserService2 ;)
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