Re: Booting Custom Kernel
Dear Arindam, What I understand is, your system has two Ubuntu 12.04 installations side by side. Are you using any one of those two to compile the 2.6 kernel? If so, then executing *sudo make install* will copy the kernel vmlinux, initrd and System map files to /boot directory and trigger an *update-grub* to rebuild grub menu. Your new kernel should appear afterwards. May be you are not being able to see the kernel listing because of having a ZERO timeout in GRUB menu which is causing it to boot to the default one directly. Make sure it is not the case. On 6 June 2014 00:34, Arindam Pal palarindam1...@gmail.com wrote: Dear Sir, I am currently trying to boot a custom kernel from source. 2.6.61.32. and tried to replace the kernel of an Ubuntu 12.04 LTS with kernel 3.11.X.Y. That computer also has an another Ubuntu installation 12.04 with same kernel as that of the another Ubuntu installation. Now , when I boot the machine and try to boot with the 2.6 kernel, I can't do that and Grub is not even mentioning that particular version of the kernel. If any help about this issue is possible , please drop me a mail. Regards, Arindam Pal M.Tech (CS), 1st year, Indian Statistical Institute ph no: +91 7685950229 http://www.ixiacom.com/ http://www.linkedin.com/groups?gid=150991 https://www.facebook.com/arindam1991 ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Linux Kernel compiles all the sources for a single a syscall
Hi, I have compiled 3.4 kernel. Following the tutorial http://blog.techveda.org/adding-system-calls-linux-kernel-3-5-x/, I have updated syscall_64.tbl and triggered a 'make'. Now it has started elaborate compilation process, e.g. /fs/*.o sources. Shouldn't make only compile the changed files? ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Invoking a system using syscall()
Hi,
I want to invoke getpid() system call using syscall. Here's the code
snippet below. But, I can't find anything in dmesg|tail output.
#include sys/types.h
int main()
{
pid_tret = syscall(20);
return 0;
}
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Adding a syscall to specific kernel version
Hi, I am trying to add a new syscall to kernel 3.4. So far I have tried at least four different tutorials from Internet. To my utter frustration, whatever source files they have referred in the tutorials, at least one of those is missing in all the cases. Why isn't there a consistent interface for addition of syscall across kernel version? How will I get to know the method for a specific kernel version officially? ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Build error while building Linux Kernel 3.4
Hi. I tried building Linux Kernel 3.4 from the source on Ubuntu 10.04 (Linux LAPTOP 2.6.32-21-generic #32-Ubuntu), gcc 4.4.3 on Intel processor. Here's the output: make[1]: Nothing to be done for `all'. make[1]: Nothing to be done for `relocs'. CHK include/linux/version.h CHK include/generated/utsrelease.h CALLscripts/checksyscalls.sh CHK include/generated/compile.h UPD include/generated/compile.h CC init/version.o LD init/built-in.o CC arch/x86/kernel/signal.o arch/x86/kernel/signal.c:260: error: ‘__NR_sigreturn’ undeclared here (not in a function) arch/x86/kernel/signal.c:271: error: ‘__NR_rt_sigreturn’ undeclared here (not in a function) arch/x86/kernel/signal.c: In function ‘do_signal’: arch/x86/kernel/signal.c:798: error: ‘__NR_restart_syscall’ undeclared (first use in this function) arch/x86/kernel/signal.c:798: error: (Each undeclared identifier is reported only once arch/x86/kernel/signal.c:798: error: for each function it appears in.) make[2]: *** [arch/x86/kernel/signal.o] Error 1 make[1]: *** [arch/x86/kernel] Error 2 make: *** [arch/x86] Error 2 ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
How to test a syscall prior to compiling the kernel
Hi, While adding a syscall, how do I test the syscall code itself? If I simply try to compile the C file individually, will the compiler be able find the includes? ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
get_user() and put_user() missing in syscall list
Hi, Here's an exhaustive list http://man7.org/linux/man-pages/man2/syscalls.2.html of Linux syscall, but I can't find get_user() and put_user() API. Why is it so? What am I missing? ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Re: get_user() and put_user() missing in syscall list
I am new to Linux kernel stuffs. How are Kernel API and syscalls differ from each other? On 2 June 2014 13:43, Varka Bhadram var...@cdac.in wrote: These two are not the system calls. they are the Kernel API's to transfer the data from user address space to the kernel address space. please see: http://lxr.free-electrons.com/source/arch/x86/include/asm/uaccess.h#L239 http://lxr.free-electrons.com/source/arch/x86/include/asm/uaccess.h#L143 Regards, Varka Bhadram *MailScanner has detected a possible fraud attempt from lxr.free-electrons.com claiming to be* On June 2, 2014 at 11:29 AM Dipanjan Das mail.dipanjan@gmail.com wrote: http://lxr.free-electrons.com/source/arch/x86/include/asm/uaccess.h#L239 Hi, Here's an exhaustive list http://man7.org/linux/man-pages/man2/syscalls.2.html of Linux syscall, but I can't find get_user() and put_user() API. Why is it so? What am I missing? ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies --- [ C-DAC is on Social-Media too. Kindly follow us at: Facebook: https://www.facebook.com/CDACINDIA Twitter: @cdacindia ] This e-mail is for the sole use of the intended recipient(s) and may contain confidential and privileged information. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies and the original message. Any unauthorized review, use, disclosure, dissemination, forwarding, printing or copying of this email is strictly prohibited and appropriate legal action will be taken. --- ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
How to call syscalls - SYSCALL or 0x80 interrupt
Hi, I came across this discussion in StackExchange http://unix.stackexchange.com/questions/61891/linux-kernel-3-2-syscalls. Does anyone have any idea on this? ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Man pages for Kernel API
Hi, Like there is section #2 of man pages dedicated to syscalls, is there any official way to get the list of all supported Kernal APIs? ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Re: How to call syscalls - SYSCALL or 0x80 interrupt
Is in incorrect because the execve() call in the code is to the libc stub but not the actual syscall itself? On 3 June 2014 10:19, Greg KH g...@kroah.com wrote: On Tue, Jun 03, 2014 at 09:45:33AM +0530, Dipanjan Das wrote: Hi, I came across this discussion in StackExchange. Does anyone have any idea on this? Yes, the code looks correct, the question asked is incorrect :) ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
