[uClinux-dev] Tips on checking that application can run on uClinux?
Hello I'm a self-taught programmer, and have absolutely no experience working with embedded appliances. I was wondering... 1. How do you check that a Linux application can run OK on uClinux, especially with an MMU-less CPU like the Blackfin 2. What makes it easy/hard/impossible to port a Linux application to such configuration? From what I understood, problematic issues are the lack of fork(), MMU-less CPU's require that the application manage its own memory to avoid RAM being fragmented, etc. Thank you. ___ uClinux-dev mailing list uClinux-dev@uclinux.org http://mailman.uclinux.org/mailman/listinfo/uclinux-dev This message was resent by uclinux-dev@uclinux.org To unsubscribe see: http://mailman.uclinux.org/mailman/options/uclinux-dev
Re: [uClinux-dev] Tips on checking that application can run on uClinux?
Jivin Gilles Ganault lays it down ... Hello I'm a self-taught programmer, and have absolutely no experience working with embedded appliances. I was wondering... 1. How do you check that a Linux application can run OK on uClinux, especially with an MMU-less CPU like the Blackfin 2. What makes it easy/hard/impossible to port a Linux application to such configuration? from what I understood, problematic issues are the lack of fork(), MMU-less CPU's require that the application manage its own memory to avoid RAM being fragmented, etc. A little old, but most of what you need to know is here: http://www.linuxjournal.com/article/7221 And there is plenty more on the web to read if you need it :-) On blackfin you also get fdpic for binaries/executbales/libs, which give you even more options under uClinux. Cheers, Davidm -- David McCullough, david_mccullo...@mcafee.com, Ph:+61 734352815 McAfee - SnapGear http://www.mcafee.com http://www.uCdot.org ___ uClinux-dev mailing list uClinux-dev@uclinux.org http://mailman.uclinux.org/mailman/listinfo/uclinux-dev This message was resent by uclinux-dev@uclinux.org To unsubscribe see: http://mailman.uclinux.org/mailman/options/uclinux-dev
[uClinux-dev] Re: Tips on checking that application can run on uClinux?
On Sat, 26 Jun 2010 21:31:41 +1000, David McCullough david_mccullo...@mcafee.com wrote: A little old, but most of what you need to know is here: http://www.linuxjournal.com/article/7221 Thanks for the link. And there is plenty more on the web to read if you need it :-) Right. However, finding good, still-relevant, newbie-accessible stuff, however... ;-) ___ uClinux-dev mailing list uClinux-dev@uclinux.org http://mailman.uclinux.org/mailman/listinfo/uclinux-dev This message was resent by uclinux-dev@uclinux.org To unsubscribe see: http://mailman.uclinux.org/mailman/options/uclinux-dev
[uClinux-dev] POSIX semaphores in uClibc
I would like to use POSIX semaphores (sem_open(), sem_wait(), sem_post(), etc.) in a uClinux/uClibc system. In the 20100315 distribution, the uClibc version is still old enough that these functions are not implemented (well, they are, but they simply return an errno indicating function does not exist). I think that the newest uClibc's do have these functions implemented. Can I simply drop a newer uClibc into an existing uClinux-dist without introducing too many problems? Alternately, should I consider just lifting the implementations of the functions I need from a newer uClibc and then compiling them into my system which is still based on the older uClibc, or is that asking for trouble? Also, the POSIX semaphore functions that do exist (the ones for unnamed semaphores) appear to be implemented in a very pthread specific way. Since I'm synchronizing access to shared memory regions between two _processes_, would the uClibc implementations even work for me at all? Is there an altogether different mutual exclusion locking mechanism that I should consider using? Thanks for any advice, --Dave ___ uClinux-dev mailing list uClinux-dev@uclinux.org http://mailman.uclinux.org/mailman/listinfo/uclinux-dev This message was resent by uclinux-dev@uclinux.org To unsubscribe see: http://mailman.uclinux.org/mailman/options/uclinux-dev
