Date: Thu, 3 Feb 2000 04:27:52 +0100 From: "Marco van de Voort" <marcov@stack.nl> To: freebsd-hackers@freebsd.org Subject: porting linux app. Syscalls Message-ID: <20000203033030.099E62E803@hermes.tue.nl> In-Reply-To: <200002030019.QAA94322@bubba.whistle.com>
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I'm new to the list (and to BSD development in general), and I'm developper of the FreePascal project (www.freepascal.org) which is a bootstrapping compiler, completely written in Pascal. Currently I started preparations for a port of the linux version to FreeBSD. FreePascal (FPC) doesn't default link to libc for some reasons, and therefore directly calls syscalls, about 60 of them. I started translating the syscalls this week (peeking at the linux "emulator" code), and now I arrived at the "getdents" and readdir calls. (I want to create a native port, the emulator already runs fine) These are supported by the emulator, but actually are emulated (they don't simply change parameters and do a FBSD syscall) However when I looked into sys/syscall.h, I found out that the getdents call seems to exist? So I have a few questions:-) 1. Is there documentation for the syscalls other than the code? I know there are some manpages, but these seem to be outdated (e.g. the named getdents call) 2. Can I use the getdents call to emulate the linux getdents? I use the base functionality, not all details have to be fully the same, just the principle. And why does the emulator not use this call? 3. If I can't use the call, the emulator code seems to call VOP_ functions. Can I access these functions from the application? --- not related to the other 3 4. In the rare event that I get it finished this week; The ports howto doesn't seems to apply to bootstrapping stuff. (It assumes the apps are gcc based or created by a gcc compiled app (like perl). Where does such an app fit into the BSD project? - several megs of Pascal source (entire project + sideprojects + texdocs is 25 MB source) - gmake makefiles. - binary required to start the compile(either native FBSD or linux) . (compiling the bsd version with the linux compiler is also possible I think, if a linux binary can create an ordinary FBSD binary) Marco van de Voort (MarcoV@Stack.nl) <http://www.stack.nl/~marcov/xtdlib.htm>; To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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