* system call
@ 2016-04-07 6:23 Nitin Varyani
2016-04-07 6:30 ` Giedrius Statkevičius
` (2 more replies)
0 siblings, 3 replies; 13+ messages in thread
From: Nitin Varyani @ 2016-04-07 6:23 UTC (permalink / raw)
To: kernelnewbies
Hi,
I want to implement a system call as explained in Linux kernel
development by Robert Love.
He does three things
adding entry to entry.S
adding entry to asm/unistd.h
and adding the system call code to sched.c
and then make + make install
I do not want to implement for all architectures but only for my PC which
is 64 bit. I am not able to locate files entry. S and unistd.h which he is
telling in his tutorial.
Please help me out to figure out the exact steps. Please also mention the
linux kernel version I should use.
Nitin
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.kernelnewbies.org/pipermail/kernelnewbies/attachments/20160407/c7282824/attachment.html
^ permalink raw reply [flat|nested] 13+ messages in thread* system call 2016-04-07 6:23 system call Nitin Varyani @ 2016-04-07 6:30 ` Giedrius Statkevičius 2016-04-07 6:45 ` Sharath Chandra 2016-04-07 7:38 ` Pranay Srivastava 2 siblings, 0 replies; 13+ messages in thread From: Giedrius Statkevičius @ 2016-04-07 6:30 UTC (permalink / raw) To: kernelnewbies On Thu, Apr 7, 2016 at 9:23 AM, Nitin Varyani <varyani.nitin1@gmail.com> wrote: > Hi, > I want to implement a system call as explained in Linux kernel > development by Robert Love. > > He does three things > adding entry to entry.S > adding entry to asm/unistd.h > and adding the system call code to sched.c > > > and then make + make install > > I do not want to implement for all architectures but only for my PC which > is 64 bit. I am not able to locate files entry. S and unistd.h which he is > telling in his tutorial. > Please help me out to figure out the exact steps. Please also mention the > linux kernel version I should use. > Not sure if that is still applicable but you could refer to this recent example: https://lkml.org/lkml/2016/3/31/1109 -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.kernelnewbies.org/pipermail/kernelnewbies/attachments/20160407/7f2c2a76/attachment.html ^ permalink raw reply [flat|nested] 13+ messages in thread
* system call 2016-04-07 6:23 system call Nitin Varyani 2016-04-07 6:30 ` Giedrius Statkevičius @ 2016-04-07 6:45 ` Sharath Chandra 2016-04-07 7:38 ` Pranay Srivastava 2 siblings, 0 replies; 13+ messages in thread From: Sharath Chandra @ 2016-04-07 6:45 UTC (permalink / raw) To: kernelnewbies Hi Nitin, Take a look at this link, it'll give you a start: http://blog.techveda.org/adding-system-calls-linux-kernel-3-5-x/ On Wed, Apr 6, 2016 at 11:23 PM, Nitin Varyani <varyani.nitin1@gmail.com> wrote: > Hi, > I want to implement a system call as explained in Linux kernel > development by Robert Love. > > He does three things > adding entry to entry.S > adding entry to asm/unistd.h > and adding the system call code to sched.c > > > and then make + make install > > I do not want to implement for all architectures but only for my PC which > is 64 bit. I am not able to locate files entry. S and unistd.h which he is > telling in his tutorial. > Please help me out to figure out the exact steps. Please also mention the > linux kernel version I should use. > > Nitin > > _______________________________________________ > Kernelnewbies mailing list > Kernelnewbies at kernelnewbies.org > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies > > -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.kernelnewbies.org/pipermail/kernelnewbies/attachments/20160406/9e2f1f5a/attachment.html ^ permalink raw reply [flat|nested] 13+ messages in thread
* system call 2016-04-07 6:23 system call Nitin Varyani 2016-04-07 6:30 ` Giedrius Statkevičius 2016-04-07 6:45 ` Sharath Chandra @ 2016-04-07 7:38 ` Pranay Srivastava 2016-04-09 11:33 ` Nitin Varyani 2 siblings, 1 reply; 13+ messages in thread From: Pranay Srivastava @ 2016-04-07 7:38 UTC (permalink / raw) To: kernelnewbies Nitin On Thu, Apr 7, 2016 at 11:53 AM, Nitin Varyani <varyani.nitin1@gmail.com> wrote: > > Hi, > I want to implement a system call as explained in Linux kernel development by Robert Love. > > He does three things > adding entry to entry.S > adding entry to asm/unistd.h > and adding the system call code to sched.c > > > and then make + make install > > I do not want to implement for all architectures but only for my PC which is 64 bit. I am not able to locate files entry. S and unistd.h which he is telling in his tutorial. > Please help me out to figure out the exact steps. Please also mention the linux kernel version I should use. > Please refer this. I wrote this quite a while back but should be good to go. http://codewithkernel.blogspot.my/2014/06/adding-new-system-call-in-linux-x86-and.html > Nitin > > _______________________________________________ > Kernelnewbies mailing list > Kernelnewbies at kernelnewbies.org > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies > -- ---P.K.S ^ permalink raw reply [flat|nested] 13+ messages in thread
* system call 2016-04-07 7:38 ` Pranay Srivastava @ 2016-04-09 11:33 ` Nitin Varyani 2016-04-09 14:09 ` Pranay Srivastava 0 siblings, 1 reply; 13+ messages in thread From: Nitin Varyani @ 2016-04-09 11:33 UTC (permalink / raw) To: kernelnewbies Neither of the solution is working. @ Pranay: kernel is not booting after making the changes you have mentioned. somethings like "dropping to shell initramfs:" is displayed on booting. On Thu, Apr 7, 2016 at 1:08 PM, Pranay Srivastava <pranjas@gmail.com> wrote: > Nitin > > > On Thu, Apr 7, 2016 at 11:53 AM, Nitin Varyani <varyani.nitin1@gmail.com> > wrote: > > > > Hi, > > I want to implement a system call as explained in Linux kernel > development by Robert Love. > > > > He does three things > > adding entry to entry.S > > adding entry to asm/unistd.h > > and adding the system call code to sched.c > > > > > > and then make + make install > > > > I do not want to implement for all architectures but only for my PC > which is 64 bit. I am not able to locate files entry. S and unistd.h which > he is telling in his tutorial. > > Please help me out to figure out the exact steps. Please also mention > the linux kernel version I should use. > > > > Please refer this. I wrote this quite a while back but should be good to > go. > > > http://codewithkernel.blogspot.my/2014/06/adding-new-system-call-in-linux-x86-and.html > > > Nitin > > > > _______________________________________________ > > Kernelnewbies mailing list > > Kernelnewbies at kernelnewbies.org > > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies > > > > > > -- > ---P.K.S > -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.kernelnewbies.org/pipermail/kernelnewbies/attachments/20160409/861f725b/attachment.html ^ permalink raw reply [flat|nested] 13+ messages in thread
* system call 2016-04-09 11:33 ` Nitin Varyani @ 2016-04-09 14:09 ` Pranay Srivastava 2016-04-09 14:21 ` Nitin Varyani 0 siblings, 1 reply; 13+ messages in thread From: Pranay Srivastava @ 2016-04-09 14:09 UTC (permalink / raw) To: kernelnewbies Hi Nitin On Sat, Apr 9, 2016 at 5:03 PM, Nitin Varyani <varyani.nitin1@gmail.com> wrote: > Neither of the solution is working. > @ Pranay: kernel is not booting after making the changes you have mentioned. > somethings like > "dropping to shell > initramfs:" > is displayed on booting. I don't think this is related to the changes you made. I would advise you just build the sources for your distro and try to get to boot the kernel you compiled. Perhaps some steps you might have missed specific to your distro? > > > On Thu, Apr 7, 2016 at 1:08 PM, Pranay Srivastava <pranjas@gmail.com> wrote: >> >> Nitin >> >> >> On Thu, Apr 7, 2016 at 11:53 AM, Nitin Varyani <varyani.nitin1@gmail.com> >> wrote: >> > >> > Hi, >> > I want to implement a system call as explained in Linux kernel >> > development by Robert Love. >> > >> > He does three things >> > adding entry to entry.S >> > adding entry to asm/unistd.h >> > and adding the system call code to sched.c >> > >> > >> > and then make + make install >> > >> > I do not want to implement for all architectures but only for my PC >> > which is 64 bit. I am not able to locate files entry. S and unistd.h which >> > he is telling in his tutorial. >> > Please help me out to figure out the exact steps. Please also mention >> > the linux kernel version I should use. >> > >> >> Please refer this. I wrote this quite a while back but should be good to >> go. >> >> >> http://codewithkernel.blogspot.my/2014/06/adding-new-system-call-in-linux-x86-and.html >> >> > Nitin >> > >> > _______________________________________________ >> > Kernelnewbies mailing list >> > Kernelnewbies at kernelnewbies.org >> > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies >> > >> >> >> >> -- >> ---P.K.S > > -- ---P.K.S ^ permalink raw reply [flat|nested] 13+ messages in thread
* system call 2016-04-09 14:09 ` Pranay Srivastava @ 2016-04-09 14:21 ` Nitin Varyani 2016-04-09 14:34 ` Pranay Srivastava 0 siblings, 1 reply; 13+ messages in thread From: Nitin Varyani @ 2016-04-09 14:21 UTC (permalink / raw) To: kernelnewbies I have a 64 bit machine I am changing linux 3.5.4 source tree. I modified syscall_64.tbl I had put your code in linux_3.5.4/arch/x86/pks_first/pks_first_call.c Then, I created pks_first/Makefile Modified the arch/x86/Kbuild Modified include/linux/syscalls.h I ran "make menuconfig" and then simply exit. Then I ran "make" I saw that pks_first_call.o was created I then ran "make modules_install" "make install" After then I restarted my system and booted linux 3.5.4. But it was stuck half way. On Sat, Apr 9, 2016 at 7:39 PM, Pranay Srivastava <pranjas@gmail.com> wrote: > Hi Nitin > > On Sat, Apr 9, 2016 at 5:03 PM, Nitin Varyani <varyani.nitin1@gmail.com> > wrote: > > Neither of the solution is working. > > @ Pranay: kernel is not booting after making the changes you have > mentioned. > > somethings like > > "dropping to shell > > initramfs:" > > is displayed on booting. > > I don't think this is related to the changes you made. I would advise > you just build the sources for your > distro and try to get to boot the kernel you compiled. Perhaps some > steps you might have missed specific to your > distro? > > > > > > > On Thu, Apr 7, 2016 at 1:08 PM, Pranay Srivastava <pranjas@gmail.com> > wrote: > >> > >> Nitin > >> > >> > >> On Thu, Apr 7, 2016 at 11:53 AM, Nitin Varyani < > varyani.nitin1 at gmail.com> > >> wrote: > >> > > >> > Hi, > >> > I want to implement a system call as explained in Linux kernel > >> > development by Robert Love. > >> > > >> > He does three things > >> > adding entry to entry.S > >> > adding entry to asm/unistd.h > >> > and adding the system call code to sched.c > >> > > >> > > >> > and then make + make install > >> > > >> > I do not want to implement for all architectures but only for my PC > >> > which is 64 bit. I am not able to locate files entry. S and unistd.h > which > >> > he is telling in his tutorial. > >> > Please help me out to figure out the exact steps. Please also mention > >> > the linux kernel version I should use. > >> > > >> > >> Please refer this. I wrote this quite a while back but should be good to > >> go. > >> > >> > >> > http://codewithkernel.blogspot.my/2014/06/adding-new-system-call-in-linux-x86-and.html > >> > >> > Nitin > >> > > >> > _______________________________________________ > >> > Kernelnewbies mailing list > >> > Kernelnewbies at kernelnewbies.org > >> > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies > >> > > >> > >> > >> > >> -- > >> ---P.K.S > > > > > > > > -- > ---P.K.S > -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.kernelnewbies.org/pipermail/kernelnewbies/attachments/20160409/08a4dcb5/attachment-0001.html ^ permalink raw reply [flat|nested] 13+ messages in thread
* system call 2016-04-09 14:21 ` Nitin Varyani @ 2016-04-09 14:34 ` Pranay Srivastava 2016-04-09 14:41 ` Nitin Varyani 0 siblings, 1 reply; 13+ messages in thread From: Pranay Srivastava @ 2016-04-09 14:34 UTC (permalink / raw) To: kernelnewbies On Sat, Apr 9, 2016 at 7:51 PM, Nitin Varyani <varyani.nitin1@gmail.com> wrote: > I have a 64 bit machine > Before changing the source try to build, install and boot your kernel. I'm sure there are some extra steps you might need to perform to boot your compiled kernel. Which distro are you using? I used OpenSuse for this work. > I am changing linux 3.5.4 source tree. > > I modified syscall_64.tbl > I had put your code in linux_3.5.4/arch/x86/pks_first/pks_first_call.c > > Then, I created pks_first/Makefile > > Modified the arch/x86/Kbuild > > Modified include/linux/syscalls.h > > > I ran "make menuconfig" and then simply exit. > > Then I ran > > "make" > > I saw that pks_first_call.o was created > > I then ran > > "make modules_install" > "make install" > > After then I restarted my system and booted linux 3.5.4. But it was stuck > half way. > > On Sat, Apr 9, 2016 at 7:39 PM, Pranay Srivastava <pranjas@gmail.com> wrote: >> >> Hi Nitin >> >> On Sat, Apr 9, 2016 at 5:03 PM, Nitin Varyani <varyani.nitin1@gmail.com> >> wrote: >> > Neither of the solution is working. >> > @ Pranay: kernel is not booting after making the changes you have >> > mentioned. >> > somethings like >> > "dropping to shell >> > initramfs:" >> > is displayed on booting. >> >> I don't think this is related to the changes you made. I would advise >> you just build the sources for your >> distro and try to get to boot the kernel you compiled. Perhaps some >> steps you might have missed specific to your >> distro? >> >> > >> > >> > On Thu, Apr 7, 2016 at 1:08 PM, Pranay Srivastava <pranjas@gmail.com> >> > wrote: >> >> >> >> Nitin >> >> >> >> >> >> On Thu, Apr 7, 2016 at 11:53 AM, Nitin Varyani >> >> <varyani.nitin1@gmail.com> >> >> wrote: >> >> > >> >> > Hi, >> >> > I want to implement a system call as explained in Linux kernel >> >> > development by Robert Love. >> >> > >> >> > He does three things >> >> > adding entry to entry.S >> >> > adding entry to asm/unistd.h >> >> > and adding the system call code to sched.c >> >> > >> >> > >> >> > and then make + make install >> >> > >> >> > I do not want to implement for all architectures but only for my PC >> >> > which is 64 bit. I am not able to locate files entry. S and unistd.h >> >> > which >> >> > he is telling in his tutorial. >> >> > Please help me out to figure out the exact steps. Please also mention >> >> > the linux kernel version I should use. >> >> > >> >> >> >> Please refer this. I wrote this quite a while back but should be good >> >> to >> >> go. >> >> >> >> >> >> >> >> http://codewithkernel.blogspot.my/2014/06/adding-new-system-call-in-linux-x86-and.html >> >> >> >> > Nitin >> >> > >> >> > _______________________________________________ >> >> > Kernelnewbies mailing list >> >> > Kernelnewbies at kernelnewbies.org >> >> > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies >> >> > >> >> >> >> >> >> >> >> -- >> >> ---P.K.S >> > >> > >> >> >> >> -- >> ---P.K.S > > -- ---P.K.S ^ permalink raw reply [flat|nested] 13+ messages in thread
* system call 2016-04-09 14:34 ` Pranay Srivastava @ 2016-04-09 14:41 ` Nitin Varyani 2016-04-09 14:46 ` Pranay Srivastava 0 siblings, 1 reply; 13+ messages in thread From: Nitin Varyani @ 2016-04-09 14:41 UTC (permalink / raw) To: kernelnewbies I am using Ubuntu On Sat, Apr 9, 2016 at 8:04 PM, Pranay Srivastava <pranjas@gmail.com> wrote: > On Sat, Apr 9, 2016 at 7:51 PM, Nitin Varyani <varyani.nitin1@gmail.com> > wrote: > > I have a 64 bit machine > > > > Before changing the source try to build, install and boot your kernel. > I'm sure there are some extra steps you might need to perform to boot your > compiled kernel. Which distro are you using? I used OpenSuse for this work. > > > > I am changing linux 3.5.4 source tree. > > > > I modified syscall_64.tbl > > I had put your code in linux_3.5.4/arch/x86/pks_first/pks_first_call.c > > > > Then, I created pks_first/Makefile > > > > Modified the arch/x86/Kbuild > > > > Modified include/linux/syscalls.h > > > > > > I ran "make menuconfig" and then simply exit. > > > > Then I ran > > > > "make" > > > > I saw that pks_first_call.o was created > > > > I then ran > > > > "make modules_install" > > "make install" > > > > After then I restarted my system and booted linux 3.5.4. But it was stuck > > half way. > > > > On Sat, Apr 9, 2016 at 7:39 PM, Pranay Srivastava <pranjas@gmail.com> > wrote: > >> > >> Hi Nitin > >> > >> On Sat, Apr 9, 2016 at 5:03 PM, Nitin Varyani <varyani.nitin1@gmail.com > > > >> wrote: > >> > Neither of the solution is working. > >> > @ Pranay: kernel is not booting after making the changes you have > >> > mentioned. > >> > somethings like > >> > "dropping to shell > >> > initramfs:" > >> > is displayed on booting. > >> > >> I don't think this is related to the changes you made. I would advise > >> you just build the sources for your > >> distro and try to get to boot the kernel you compiled. Perhaps some > >> steps you might have missed specific to your > >> distro? > >> > >> > > >> > > >> > On Thu, Apr 7, 2016 at 1:08 PM, Pranay Srivastava <pranjas@gmail.com> > >> > wrote: > >> >> > >> >> Nitin > >> >> > >> >> > >> >> On Thu, Apr 7, 2016 at 11:53 AM, Nitin Varyani > >> >> <varyani.nitin1@gmail.com> > >> >> wrote: > >> >> > > >> >> > Hi, > >> >> > I want to implement a system call as explained in Linux > kernel > >> >> > development by Robert Love. > >> >> > > >> >> > He does three things > >> >> > adding entry to entry.S > >> >> > adding entry to asm/unistd.h > >> >> > and adding the system call code to sched.c > >> >> > > >> >> > > >> >> > and then make + make install > >> >> > > >> >> > I do not want to implement for all architectures but only for my PC > >> >> > which is 64 bit. I am not able to locate files entry. S and > unistd.h > >> >> > which > >> >> > he is telling in his tutorial. > >> >> > Please help me out to figure out the exact steps. Please also > mention > >> >> > the linux kernel version I should use. > >> >> > > >> >> > >> >> Please refer this. I wrote this quite a while back but should be good > >> >> to > >> >> go. > >> >> > >> >> > >> >> > >> >> > http://codewithkernel.blogspot.my/2014/06/adding-new-system-call-in-linux-x86-and.html > >> >> > >> >> > Nitin > >> >> > > >> >> > _______________________________________________ > >> >> > Kernelnewbies mailing list > >> >> > Kernelnewbies at kernelnewbies.org > >> >> > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies > >> >> > > >> >> > >> >> > >> >> > >> >> -- > >> >> ---P.K.S > >> > > >> > > >> > >> > >> > >> -- > >> ---P.K.S > > > > > > > > -- > ---P.K.S > -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.kernelnewbies.org/pipermail/kernelnewbies/attachments/20160409/65a8d643/attachment.html ^ permalink raw reply [flat|nested] 13+ messages in thread
* system call 2016-04-09 14:41 ` Nitin Varyani @ 2016-04-09 14:46 ` Pranay Srivastava 0 siblings, 0 replies; 13+ messages in thread From: Pranay Srivastava @ 2016-04-09 14:46 UTC (permalink / raw) To: kernelnewbies On Sat, Apr 9, 2016 at 8:11 PM, Nitin Varyani <varyani.nitin1@gmail.com> wrote: > I am using Ubuntu > > On Sat, Apr 9, 2016 at 8:04 PM, Pranay Srivastava <pranjas@gmail.com> wrote: >> >> On Sat, Apr 9, 2016 at 7:51 PM, Nitin Varyani <varyani.nitin1@gmail.com> >> wrote: >> > I have a 64 bit machine >> > >> >> Before changing the source try to build, install and boot your kernel. >> I'm sure there are some extra steps you might need to perform to boot your >> compiled kernel. Which distro are you using? I used OpenSuse for this >> work. >> >> >> > I am changing linux 3.5.4 source tree. >> > >> > I modified syscall_64.tbl >> > I had put your code in linux_3.5.4/arch/x86/pks_first/pks_first_call.c >> > >> > Then, I created pks_first/Makefile >> > >> > Modified the arch/x86/Kbuild >> > >> > Modified include/linux/syscalls.h >> > >> > >> > I ran "make menuconfig" and then simply exit. >> > >> > Then I ran >> > >> > "make" >> > >> > I saw that pks_first_call.o was created >> > >> > I then ran >> > >> > "make modules_install" >> > "make install" >> > >> > After then I restarted my system and booted linux 3.5.4. But it was >> > stuck >> > half way. >> > >> > On Sat, Apr 9, 2016 at 7:39 PM, Pranay Srivastava <pranjas@gmail.com> >> > wrote: >> >> >> >> Hi Nitin >> >> >> >> On Sat, Apr 9, 2016 at 5:03 PM, Nitin Varyani >> >> <varyani.nitin1@gmail.com> >> >> wrote: >> >> > Neither of the solution is working. >> >> > @ Pranay: kernel is not booting after making the changes you have >> >> > mentioned. >> >> > somethings like >> >> > "dropping to shell >> >> > initramfs:" >> >> > is displayed on booting. >> >> >> >> I don't think this is related to the changes you made. I would advise >> >> you just build the sources for your >> >> distro and try to get to boot the kernel you compiled. Perhaps some >> >> steps you might have missed specific to your >> >> distro? >> >> >> >> > >> >> > >> >> > On Thu, Apr 7, 2016 at 1:08 PM, Pranay Srivastava <pranjas@gmail.com> >> >> > wrote: >> >> >> >> >> >> Nitin >> >> >> >> >> >> >> >> >> On Thu, Apr 7, 2016 at 11:53 AM, Nitin Varyani >> >> >> <varyani.nitin1@gmail.com> >> >> >> wrote: >> >> >> > >> >> >> > Hi, >> >> >> > I want to implement a system call as explained in Linux >> >> >> > kernel >> >> >> > development by Robert Love. >> >> >> > >> >> >> > He does three things >> >> >> > adding entry to entry.S >> >> >> > adding entry to asm/unistd.h >> >> >> > and adding the system call code to sched.c >> >> >> > >> >> >> > >> >> >> > and then make + make install >> >> >> > >> >> >> > I do not want to implement for all architectures but only for my >> >> >> > PC >> >> >> > which is 64 bit. I am not able to locate files entry. S and >> >> >> > unistd.h >> >> >> > which >> >> >> > he is telling in his tutorial. >> >> >> > Please help me out to figure out the exact steps. Please also >> >> >> > mention >> >> >> > the linux kernel version I should use. >> >> >> > >> >> >> >> >> >> Please refer this. I wrote this quite a while back but should be >> >> >> good >> >> >> to >> >> >> go. >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> http://codewithkernel.blogspot.my/2014/06/adding-new-system-call-in-linux-x86-and.html >> >> >> >> >> >> > Nitin >> >> >> > >> >> >> > _______________________________________________ >> >> >> > Kernelnewbies mailing list >> >> >> > Kernelnewbies at kernelnewbies.org >> >> >> > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies >> >> >> > >> >> >> >> >> >> >> >> >> >> >> >> -- >> >> >> ---P.K.S >> >> > >> >> > >> >> >> >> >> >> >> >> -- >> >> ---P.K.S >> > >> > >> >> >> >> -- >> ---P.K.S > > Check this http://unix.stackexchange.com/questions/123632/newly-compiled-kernel-not-booting-up-vanilla-kernel-3-12-14 -- ---P.K.S ^ permalink raw reply [flat|nested] 13+ messages in thread
* system call @ 2011-06-11 9:39 Venkateswarlu P 2011-06-11 9:58 ` Rajat Sharma 2011-06-11 17:59 ` Javier Martinez Canillas 0 siblings, 2 replies; 13+ messages in thread From: Venkateswarlu P @ 2011-06-11 9:39 UTC (permalink / raw) To: kernelnewbies Where do i find system call implementation code? *for read, write, open, close* -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.kernelnewbies.org/pipermail/kernelnewbies/attachments/20110611/3aa5f27a/attachment.html ^ permalink raw reply [flat|nested] 13+ messages in thread
* system call 2011-06-11 9:39 Venkateswarlu P @ 2011-06-11 9:58 ` Rajat Sharma 2011-06-11 17:59 ` Javier Martinez Canillas 1 sibling, 0 replies; 13+ messages in thread From: Rajat Sharma @ 2011-06-11 9:58 UTC (permalink / raw) To: kernelnewbies search for SYSCALL_DEFINE<X>(syscall) in linux source e.g. SYSCALL_DEFINE3(open, const char __user *, filename, int, flags, int, mode) in fs/open.c here <X> depends on number of arguments to system call: 3 in case of open. you would find open, read, write and close in fs directory only. -Rajat On Sat, Jun 11, 2011 at 3:09 PM, Venkateswarlu P <p.venkatesh551@gmail.com> wrote: > > > Where do i find system call implementation code? > > for? read, write, open, close > _______________________________________________ > Kernelnewbies mailing list > Kernelnewbies at kernelnewbies.org > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies > > ^ permalink raw reply [flat|nested] 13+ messages in thread
* system call 2011-06-11 9:39 Venkateswarlu P 2011-06-11 9:58 ` Rajat Sharma @ 2011-06-11 17:59 ` Javier Martinez Canillas 1 sibling, 0 replies; 13+ messages in thread From: Javier Martinez Canillas @ 2011-06-11 17:59 UTC (permalink / raw) To: kernelnewbies On Sat, Jun 11, 2011 at 6:39 PM, Venkateswarlu P <p.venkatesh551@gmail.com> wrote: > > > Where do i find system call implementation code? > > for? read, write, open, close For file system related syscalls, it would depend on the fs implementation. The Virtual File System only defines a uniform common high level layer but is the responsibility of every fs to actually implement the file operations (open, read, write, etc). There is some generic file operations in linux/fs/read_write.c that are used for simple fs like romfs and ramfs. I would recommend start looking at these memory file systems first. Then you could look how real file systems operations are implemented. Every fs usually have a file.c file where a struct file_operations is defined. This structure has a function pointer for every file operation. The functions asigned to these function pointers are the ones that actually implements the operations. Some of these could be generic operations and some of them are fs specific. Hope it helps, -- Javier Mart?nez Canillas (+34) 682 39 81 69 PhD Student in High Performance Computing Computer Architecture and Operating System Department (CAOS) Universitat Aut?noma de Barcelona Barcelona, Spain ^ permalink raw reply [flat|nested] 13+ messages in thread
end of thread, other threads:[~2016-04-09 14:46 UTC | newest] Thread overview: 13+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2016-04-07 6:23 system call Nitin Varyani 2016-04-07 6:30 ` Giedrius Statkevičius 2016-04-07 6:45 ` Sharath Chandra 2016-04-07 7:38 ` Pranay Srivastava 2016-04-09 11:33 ` Nitin Varyani 2016-04-09 14:09 ` Pranay Srivastava 2016-04-09 14:21 ` Nitin Varyani 2016-04-09 14:34 ` Pranay Srivastava 2016-04-09 14:41 ` Nitin Varyani 2016-04-09 14:46 ` Pranay Srivastava -- strict thread matches above, loose matches on Subject: below -- 2011-06-11 9:39 Venkateswarlu P 2011-06-11 9:58 ` Rajat Sharma 2011-06-11 17:59 ` Javier Martinez Canillas
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox; as well as URLs for NNTP newsgroup(s).