Android Kernel Driver Fails to request irq
While up-streaming a kernel(3.18 to 4.9) for an android device I faced a issue where the display driver(ft5435) fails to load.. upon looking onto logs it suggest it has something to do with failing irq...
View ArticleTurn linux as usb keyboard for a android device? [closed]
I'm trying to turn my laptop as a USB keyboard for an Android(or all keyboard supported) devices. For that, I need to create a vendor id for external connection (if it needed). If it is possible, how...
View ArticleBuild static library and link it to kernel module at compile time
I'm trying to build a static -helper- library of pure C code (no standards c headers) and then link it with a kernel module in compile time in the Makefile, but I can't seem to get it working.Let's say...
View ArticlePostgresql not getting installed on ubuntu 20
I have recently upgraded my ubuntu to 20.04. Now, I am trying to install the postgresql but I am getting error. I have tried to 100 different ways and crawled every web but nothing worked.These are the...
View ArticleKernel Module/driver project/semi projects ideas? [closed]
Hey guys I want to expand my knowledge and experience in Linux internals and C language so I wondered if there are some recommended projects to do related to the Linux kernel.Thank you for any help!
View ArticleLinux kernel mode string copy
After few minutes of search for string copy on kernel mode, thought of posting a new question. What utility will help me to do a string copy when the code runs in ** Kernel Mode ** ?I'm sure there...
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Unable to boot kernel image built for vexpress-a9 on qemu : Blank Screen
I have compiled linux kernel v4.9 using the following steps : export ARCH=armexport CROSS_COMPILE=arm-linux-gnueabi-make vexpress_defconfigmake all -j40Then I created ramdisk with a simple hello world...
View Articlemissing "linux/ext2_fs.h" in Ubuntu 16.04 [duplicate]
O/S : Ubuntu 16.04 LTSWhile attempting to compile the e2undel source, gcc is complaining about :e2undel.h:9:27: fatal error: linux/ext2_fs.h: No such file or directoryThe file most certainly does not...
View Articlemodifying u-boot environment in kernel init
I'm trying to modify a u-boot env arg within the kernel code.I've found boot_command_line var in main.c and setup.c, which contains an arg, so that made me think it is possible, however, I coudn't find...
View ArticleWhy is the MTF bit reset after a while in kvm?
I have been playing around with VMX and KVM and have a few more general and some more precise questions.I created a VM with the virtual manager because I assumed (from what I have read online) it to be...
View ArticleControversial __set_task_state(tsk, state_value) macro syntax in linux kernel...
I came across this syntax in several macros, in linux kernel 2.4.31 files, but to keep things in focus I am asking regarding __set_task_state(tsk, state_value) macro defined in...
View ArticleIs socket routing based on source address or destination address in Linux...
Consider there are multiple NICs in a PC. When sending a packet on an unconnected and unbound raw socket e.g. using sendmsg(), which interface will be selected for forwarding the packet to the...
View ArticleUsing docker rootless with new version
There is a new capabilities on docker new release,https://docs.docker.com/engine/security/rootless/We need to run it in our environments and provide usingDockerfileI try the followingFROM...
View ArticleClose call does not release underlying resources for the device
A bit of context: Linux 3.10.40, Multi-threads application, main thread waiting for user input (keyboard), other threads waiting (epoll_wait) for events. No specific priority for either application or...
View ArticleCheck if the page is in the task's VMA
Is there a way in order to check if the page in question is used by specified process?i.e. I have a pointer to struct page and struct task_struct and I want to obtain a boolean value denoting if the...
View ArticleWhy does the Linux kernel not stop at the first handler for a shared IRQ that...
I'm sure there's a good reason for this, but I can't see what it is. Inside __handle_irq_event_percpu the kernel loops over all the handlers registered for a particular IRQ line and calls it. What I...
View ArticleScatterlist in linux crypto api
I start to learn how to work with Crypto API in linux. It's offered to use scatterlist structures to transfer plaintext to block cipher function. Scatterlist handle to the plaintext by storing location...
View ArticleLinux kernel module compilation fails
My last kernel development was in version 2.6~Now I try to compile a module, and I get the following error when compiling outside the kernel tree./bin/sh: 1:...
View ArticleIs there a way to identify the start of Linux's signal handling using systems...
I am learning about Linux signal handling.I am auditing an application (using Sysdig) while it runs. The application can receive different signals at any time and it defines various signal handlers for...
View Articlekernel panic not syncing attempted to kill init exitcode=0x00007f00 [closed]
After downloading virtualBox on my Centos 8 the kernel got damaged so I tried a solution on my command line and then I reboot the system so after this I got this errorenter image description hereI...
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