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diff --git a/contrib/ntp/html/vxworks.htm b/contrib/ntp/html/vxworks.htm new file mode 100644 index 0000000..b6fae80 --- /dev/null +++ b/contrib/ntp/html/vxworks.htm @@ -0,0 +1,153 @@ +<HTML> +<HEAD> + <TITLE>vxWorks Port of NTP</TITLE> +</HEAD> +<BODY LINK="#00008B" VLINK="#8B0000"> + +<H1>VxWorks port of NTP </H1> + +<P>Creating a port for vxWorks posed some problems. This port may help +as a starting point for similar ports to real-time OS's and other embeddable +kernels, particularly where main() is not allowed, and where the configure +scripts need to be altered. </P> + +<H1><B>Configuration issues</B></H1> + +<P>I decided to do as little invasive surgery as possible on the NTP code, +so I brought the vxWorks header tree in line with the standard unix tree. +The following changes were needed, as a side effect these changes will +allow for easy porting of other autoconfigure enabled code. </P> + +<P>Where I have 386 you will need to put in your target type. The vxWorks +tree entry point is /usr/wind. If these are the same for your system, you +should be able to cut and paste the changes. </P> + +<P><BLINK>WARNING: Check you are not overwriting files, before entering +the following: there should be no conflict, but check first... </BLINK></P> + +<P>export CC="cc386 -nostdlib -m486 -DCPU=I80486 -I/usr/wind/target/h" +<BR> +export RANLIB=ranlib386 <BR> +export AR=ar386 <BR> +export VX_KERNEL=/usr/wind/target/config/ims_std_bsp/vxWorks <BR> +cd /usr/wind/target/sys <BR> +ln -s ../signal.h <BR> +ln -s ../time.h <BR> +ln -s socket.h sockio.h <BR> +ln -s ../selectLib.h select.h <BR> +ln -s ../timers.h <BR> +touch file.h param.h resource.h utsname.h var.h ../netdb.h ../a.out.h ../termios.h +<BR> +echo " ******ADD #include \"sys/times.h\" to sys/time.h +" </P> + +<P>The configure script must be changed in the following way to get the +linking tests to work, once in the correct directory issue the following +commands: <BR> +sed -e 's%main.*()%vxmain()%' configure > configure.vxnew <BR> +mv configure.vxnew configure <BR> +chmod 755 configure </P> +<P>The new version 4 of NTP requires some maths functions so it links in the +maths library (-lm) in the ntpd <a href="../ntpd/Makefile.am">Makefile.am</a> +change the line "ntpd_LDADD = $(LDADD) -lm" by removing the "-lm".<BR> +You are now ready to compile</P> + + +<P><BR> +The <A HREF="../configure.in">configure.in </A>file needed to be altered +to allow for a host-target configuration to take place. </P> + +<UL> +<LI>The define SYS_VXWORKS was added to the compilation flags. </LI> + +<LI>Little endianess is set if the target is of type iX86. </LI> + +<LI>The size of char, integer, long values are all set. If Wind River ever +changes these values they will need to be updated. </LI> + +<LI>clock_settime() is defined to be used for setting the clock. </LI> + +<LI>The Linking flags have -r added to allow for relinking into the vxWorks +kernel </LI> +</UL> + +<P>Unfortunately I have had to make use of the <A HREF="../include/ntp_machine.h">ntp_machine.h +</A>file to add in the checks that would have been checked at linking stage +by autoconf, a better method should be devised. </P> + +<UL> +<LI>There is now a NO_MAIN_ALLOWED define that simulates command line args, +this allows the use of the normal startup sysntax. </LI> + +<LI>POSIX timers have been added. </LI> + +<LI>Structures normally found in netdb.h have been added with, the corresponding +code is in <A HREF="../libntp/machines.c">machines.c </A>. Where possible +the defines for these have been kept non-vxWorks specific.</LI> +</UL> + +<P>Unfortunately there are still quite a few SYS_VXWORKS type defines in +the source, but I have eliminated as many as possible. You have the choice +of using the usrtime.a library avaliable from the vxworks archives or forgoing +adjtime() and using the clock_[get|set]time().The <A HREF="../include/ntp_machine.h">ntp_machine.h +</A>file clearly marks how to do this. </P> + +<H1><B>Compilation issues</B> </H1> + +<P>You will need autoconf and automake ... available free from the gnu +archives worldwide. </P> + +<P>The variable arch is the target architecture (e.g. i486) </P> + +<P>mkdir A.vxworks (or whatever....) <BR> +cd A.vxworks <BR> +../configure --target=arch-wrs-vxworks [any other options] <BR> +make </P> + +<P>Options I normally use are the --disable-all-clocks --enable-LOCAL-CLOCK flags. +The program should proceed to compile without problem. The daemon ntpd, +ntpdate, ntptrace, ntpdc, ntpq programs and of course the libraries are +all fully ported. The other utilities are not, but they should be easy +to port. </P> + +<H1>Running the software </H1> + +<P>Load in the various files, call them in the normal vxWorks function +type manner. Here are some examples. Refer to the man pages for further +information. </P> + +<P>ld < ntpdate/ntpdate <BR> +ld < ntpd/ntpd <BR> +ld < ntptrace/ntptrace <BR> +ld < ntpq/ntpq <BR> +ld < ntpdc/ntpdc <BR> +ntpdate ("-b", "192.168.0.245") <BR> +sp(ntpd, "-c", "/export/home/casey/ntp/ntp.conf") +<BR> +ntpdc("-c", "monlist", "192.168.0.244") +<BR> +ntpq("-c", "peers", "192.168.0.244") <BR> +ntptrace("192.168.0.244") <BR> +</P> + +<H1>Bugs and such </H1> + +<P>Should you happen across any bugs, please let me know, or better yet +fix them and submit a patch. Remember to make you patch general for Vxworks, +not just for your particular architecture. +<A HREF="http://www.ccii.co.za">CCII Systems +(Pty) Ltd</A>, my ex employers, sponsored the time to this port. +Please let me know how it goes, I would be most interested in offsets +and configurations. </P> + +<P><BR> +</P> + +<P>Casey Crellin</A> <BR> +<A HREF="mailto:casey@csc.co.za">casey@csc.co.za</A> </P> + +<P><BR> +</P> + +</BODY> +</HTML> |
