Re: How to choose format specifier for boolean variables in Linux kernel?

On Mon, May 24, 2021 at 10:39 PM Fox Chen wrote: > > On Mon, May 24, 2021 at 10:27 PM 慕冬亮 wrote: > > > > On Mon, May 24, 2021 at 10:22 PM Fox Chen wrote: > > > > > > On Mon, May 24, 2021 at 6:51 PM 慕冬亮 wrote: > > > > > > > > Hi all,

Re: How to choose format specifier for boolean variables in Linux kernel?

On Mon, May 24, 2021 at 10:27 PM 慕冬亮 wrote: > > On Mon, May 24, 2021 at 10:22 PM Fox Chen wrote: > > > > On Mon, May 24, 2021 at 6:51 PM 慕冬亮 wrote: > > > > > > Hi all, > > > > > > how do I choose format specifier for boolean variables in

Re: How to choose format specifier for boolean variables in Linux kernel?

On Mon, May 24, 2021 at 10:22 PM Fox Chen wrote: > > On Mon, May 24, 2021 at 6:51 PM 慕冬亮 wrote: > > > > Hi all, > > > > how do I choose format specifier for boolean variables in Linux > > kernel? For example, > > > > bool bup; > > pr_alert(&

How to choose format specifier for boolean variables in Linux kernel?

Hi all, how do I choose format specifier for boolean variables in Linux kernel? For example, bool bup; pr_alert("%XXX", bup); What should "XXX" be in the Linux kernel? -- My best regards to you. No System Is Safe! Dongliang Mu ___

Re: Crash dump?

> On May 15, 2020, at 12:47 PM, Subhashini Rao Beerisetty > wrote: > > Hi all, > > In Kernel, what needs to be configured to get the crash dump? > Can someone clarify me with the sequence of steps to get the crash dump.. > Some materials for specific Linux distributions(e.g., Redhat,

Re: Any successful story of debugging linux 4.13 with qemu 2.10 and gdb 8.01?

2017-09-20 15:29 GMT-04:00 jjDaNiMoTh <jjdanim...@gmail.com>: > On 20/09/17 at 11:20am, 慕冬亮 wrote: >> 2017-09-20 4:18 GMT-04:00 jjDaNiMoTh <jjdanim...@gmail.com>: >> > Hello all, >> > >> > As the title says, any of you have successfully tried to deb

Re: Any successful story of debugging linux 4.13 with qemu 2.10 and gdb 8.01?

2017-09-20 4:18 GMT-04:00 jjDaNiMoTh : > Hello all, > > As the title says, any of you have successfully tried to debug Linux > 4.13 with QEMU? My problem is that it is not possible to break (even > with hbreak) in any function of the kernel, from the most used > (schedule or

Re: How do you generate the config file?

Hello, If you want to reuse the config of current kernel, you can use `make oldconfig` to generate config file. -- My best regards to you. No System Is Safe! Dongliang Mu 2017-01-29 18:24 GMT-05:00 Ozgur Karatas : > > Hello, > > you can get .config files in two

opinion about fs and gs in linux

Dear all, When I analyzed one coredump and read some assembly code, I encounter one specific segment register : gs. I googled it and found the following links: [1] http://stackoverflow.com/questions/10810203/what-is-the-fs-gs-register-intended-for [2]

Re: free(), the size to free?

2016-05-25 14:17 GMT-04:00 Greg KH : > On Wed, May 25, 2016 at 02:00:41PM -0400, Wenda Ni wrote: >> The prototype is void kfree(const void *). >> >> As the input pointer is void *, how does the kernel know the size of memory >> to >> be freed? There should be some metadata

Re: Interesting link on linux kernel

It's very useful and interesting. And the author of this repo is a linux kernel developer. My best regards to you. No System Is Safe! mudongliang 2016-04-06 15:06 GMT-04:00 Arun Sudhilal : > https://0xax.gitbooks.io/linux-insides/content/ > > Hope you guys might

Re: Regarding Linux Kernel Upgradation

2016-03-01 20:05 GMT+08:00 Anil Nair : > Hi All, > > A little confusion, I have existing Linux kernel version 4.5rc4 I > wanted to upgrade my Linux kernel 4.5rc6, The preferred method is step > by step patch,first apply patch-4.5rc5 and then patch-4.5rc6, Then > recompile

Re: Help about Ctrl-Z and Ctrl-Y(urgent)

t;g...@kroah.com>: > On Wed, Feb 17, 2016 at 03:52:45PM +0800, 慕冬亮 wrote: >> Hi everyone, >> Unix systems support a large number of special characters that >> receive special processing by the OS. One such character is the >> “suspend” character (ctrl-Z by defau

Help about Ctrl-Z and Ctrl-Y(urgent)

Hi everyone, Unix systems support a large number of special characters that receive special processing by the OS. One such character is the “suspend” character (ctrl-Z by default), that causes a SIGTSTP signal to be sent to the application process. The default action for the signal is to

Re: Memory Management

I think "Understanding The Linux Virtual Memory Manager" is a good choice. [1] Understanding The Linux Virtual Memory Manager: https://www.kernel.org/doc/gorman/pdf/understand.pdf 2016-02-06 2:49 GMT+08:00 masoud hematpour : > Hi, > > I am beginner to kernel source. I decide

Re: hi, i want to use a script in kernel

checkpatch.pl is script to check your patch, not C file I think. 2015-11-17 13:01 GMT+08:00 Naver : > hi, > i want to use a script in kernel, but i can't use this. > in my terminal. > yoon@pc:~/project/aosp/kernel/linux/scripts$ ./checkpatch.pl sortextable.c > Must be run from

strange comment in load_elf_binary

I see something strange in the load_elf_binary. /* This is the program interpreter used for * shared libraries - for now assume that this * is an a.out format binary */ This comment is in the load_elf_binary. I don't know why it "assume that this is an a.out format binary". a.out and elf are two

get all the file_system_type registered in linux kernel

Recently I am learning vfs in kernel. I want to write a kernel module, which can show all the file_system_type registered in linux kernel. But the list head of all the file_system_type - file_systems can't be got through some API! So I check all the file systems in the /proc/filesystems. And use

how to expand linux kernel macro in kernel source code/kernel module(outside)

Recently I was learning doubly linked list in kernel, there are many macro in linux/fs.h, like list_add, list_del,list_for_each,list_entry, container_of. I know we can use "gcc -E" to expand the macro, but how do we expand the macro in kernel source code / kernel module? - mudongliang

error when make pdfdocs

I git clone and git pull the latest linux kernel. When I make pdfdocs, it reports the following error to me. But I checked the filesystems.xml:14946, no error found. --- PDF

linux aslr entropy bits

Rs: number of bits randomized in the stack area, Rm: number of bits randomized in the mmap() area, Rx: number of bits randomized in the main executable area What's those three parameters? And how to calculate the aslr entropy bits? - mudongliang

detailed process from malloc to memory management

I want to ask about the detailed process from malloc/alloca library function to memory management. 1. malloc/alloca/realloc and so on 2. heap management in library 3. memory management in linux kernel I only know those simple steps. How do I get the details of each step? The source code of glibc

Re: Could I search mails in lkml.org by date?

The lkml.org provide method to check mails in some day. For example , 2013 May 5th, you can get the mails according to the tips in the webpage, the final url is https://lkml.org/lkml/2013/5/5. There are no much mails in one day. So you can check the mails by search box in webpage or Ctrl+F

Re: Safety in Kernel Development

Since I knew that Linux kernel didn't accept the pax/grsecurity , but wrote its own implement, and some linux developers do not have sense of security, I think linux security will be a problem in the future. - mudongliang 2015-08-18 21:45 GMT+08:00 Kenneth Adam Miller

Re: how to delete kernels cleanly

The kernel shipped by ubuntu can be purged by apt-get. It's easy. The kernel you build can be cleaned in this way : 1. clean the corresponding kernel file in /usr/src/ 2. clean the corresponding file in /lib/modules/ 3. update your grub by grub-mkconfig -o /boot/grub/grub.cfg

spell problem in faq website

http://kernelnewbies.org/FAQ/current In this website , there are only one accross which is badly spelled. It should be across. ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies

How to handle float-point operations

I know there are rarely float-point operations! What's the exception? In the linux kernel, how does it handle the float-point operations in the userland? - mudongliang ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org

why use while(0) to write set_current_state

I see the macro in the include/linux/sched.h #define __set_current_state(state_value) \ do { current-state = (state_value); } while (0) Why define it like this? What's the meaning of while? mudongliang ___ Kernelnewbies mailing list

memory addressing

In Understanding the Linux kernel book, it says that linux kernel of x86 uses the segmentation and paging unit to transform logistic address to physical address! Up to now , kernel has gone to linux kernel 4.0 , does the segmentation exist in the x86? Is it only using the paging ? And in x86_64?

vulnerability use-after-free

Use-after-free is a important vulnerability ! As far as we know , Linux kernel is mostly using C and there may exist this vulnerability! I think in the kernel there are much allocator and reallocator , how do the kernel manage these things? mudongliang

Basic question about malloc

Hi, I'm looking for that whether the object allocated by malloc is the multiple of certain bytes! Or how does the malloc allocate dynamic memory ?? I does an experiment in my computer! #includestdio.h #includestdlib.h #define NUM 33 int main(int argc,const char *argv[]) { char *a,

Heap Management Problem

Hello Everyone: What's the rule about heap management? Especially what's the function of do_brk? mudongliang ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies

Re: Heap Management Problem

Can you give a detail of what you want to prove? I am not familiar with heap management , so I ask for the details! mudongliang 2015-04-15 0:00 GMT+08:00 valdis.kletni...@vt.edu: On Tue, 14 Apr 2015 23:01:58 +0800, 慕冬亮 said: Hello Everyone: What's the rule about heap management