l4-hackers

l4-hackers@os.inf.tu-dresden.de

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2880 discussions

RE: L4 for asm-free OS'es?
by Josh English 09 Apr '02

09 Apr '02

I was told that BeOS used a similar C++ structure. Though I have no idea how it was really implemented. - Josh -----Original Message----- From: Patrick Strasser [mailto:past@sbox.tugraz.at] Sent: Monday, April 08, 2002 5:29 PM To: bgat(a)billgatliff.com Cc: l4ka(a)ira.uka.de; l4-hackers(a)os.inf.tu-dresden.de Subject: Re: L4 for asm-free OS'es? William A. Gatliff wrote: > A lot of what I see happening in the C parts of Linux could be done > *so* much better with C++. I'm thinking of an OO-oriented driver > model as an example, rather than just a soup of C functions that you > have to invoke in the proper order for things to work right. "Want to > right a USB driver? Well then just inherit from USBDriver and fill in > these functions for the bulk transfers." You know, like that. :^) You probaly want to have a look at MacOS X / Darwin and its IOKit. Thats exactly what they do. Patrick _______________________________________________ l4-hackers mailing list l4-hackers(a)os.inf.tu-dresden.de http://os.inf.tu-dresden.de/mailman/listinfo/l4-hackers

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IDL4 0.8.1 released
by Andreas Haeberlen 06 Apr '02

06 Apr '02

Hello L4 hackers, IDL4 is now available for download from the L4Ka home page. IDL4 is a stub-code generator for the L4 platform. It generates communication stubs from interface definitions written in a specification language such as CORBA IDL or DCE IDL. It also uses knowledge about the hardware platform and the microkernel to optimize the performance of the generated code. Some features: o Supports CORBA IDL (recommended) and DCE IDL o Backends available for Hazelnut and Pistachio o Client stubs use CORBA C language mapping o Type import from C/C++ code o Modular design; easily extensible For more information please visit http://l4ka.org/projects/idl4/ - Andreas --- Andreas Haeberlen System Architecture Group, University of Karlsruhe, Germany haeberlen(a)ira.uka.de, phone: +49 (721) 608-4055

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Fiasco and linux22 -- RMGR: overlapping modules problem
by Ian Duggan 23 Mar '02

23 Mar '02

I'm trying to get linux22 working on the recent CVS version of fiasco. I've run into an obstacle that hopefully someone here can assist with. When my machine is booting up, I get an "overlapping modules" error that looks like this: ------------------------------------------------------- RMGR: loading /sigma0 RMGR: loading kernel /main RMGR: overlaps: 00300000-00301c78 : /main RMGR: 00100000-0015fc69 module 02: 001e6000-00345be4 : /glinux root=/dev/hdb1 init=/bin/sh overlaps, 1, mem_high = 0x09f9fc00 RMGR: overlapping modules ------------------------------------------------------- 00300000 is the starting link address of /main 00100000 is the starting link address of /rmgr I thought that maybe I needed to move the starting link address of /glinux, so I adjusted the corresponding vmlinux.lds file used for linking linux22, but there is no change in the result. I verified all code start/end addresses using objdump -d. Just now I noticed that 001e5000 is where GRUB is loading the /glinux image to. Grub shows: [Multiboot-modules @ 0x1e6000 ... when it is starting up. The problem seems to be that rmgr is calling check_inside_myself and croaking when it sees that the /glinux module overlaps it. I don't understand why the /main and /rmgr images are being loaded to their correct link locations, but /glinux is not. Is grub supposed to load things directly to the correct location, or are the modules supposed to be relocated at some point in the boot process. Any suggestions on what to look at? -- Ian ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Ian Duggan ian(a)ianduggan.net http://www.ianduggan.net

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Re: L4Env
by Ian Duggan 11 Mar '02

11 Mar '02

What is the latest status on the L4ENV stuff? --Ian > > Ian Duggan <ian(a)ianduggan.net> writes: > > > Where can I find out more information about the L4Env project? I'm > [...] > > presentation can be foud at > > http://os.inf.tu-dresden.de/~reuther/helmuth.pdf > > http://os.inf.tu-dresden.de/~reuther/helmuth_slides.pdf > > There is also a small webpage at > http://wwwos.inf.tu-dresden.de/~ch12/diplom/diplom.xml > > I will put more up-to-date documentation (doxygen) about my implementation on > it as far as I cleaned up the sources. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Ian Duggan ian(a)ianduggan.net http://www.ianduggan.net

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(no subject)
by tinker1 french 12 Feb '02

12 Feb '02

still looking for way to find pharmacys directory for overseas. _________________________________________________________________ Send and receive Hotmail on your mobile device: http://mobile.msn.com

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L4 Version X.2 announcement
by Uwe Dannowski 28 Jan '02

28 Jan '02

The L4Ka Team is happy to announce the availability of the L4 microkernel API specification, Version X.2. The specification can be downloaded in PDF format from the L4Ka web-site (http://l4ka.org/). It should be noted that the Version X.2 specification is experimental. Future revisions may contain modifications and introduce incompatibilities with the current revision. It is nevertheless our intention that the amount of changes to the specification should be small, and that the X.2 specification should deviate as little as possible from the forthcoming Version 4 specification. The L4Ka Team is currently working on providing a reference implementation for the specification. No release date has been chosen. - The L4Ka Team

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L4/Alpha palcodes
by Goswin Brederlow 25 Jan '02

25 Jan '02

Hi, I hope this is the right place, havent read anything here for ages. I was wondering whether the palcodes used by L4 on Alpha are disjunct to the ones used by OSF / BSD / Linux. If not could they be made disjunct? The idea I have in mind is to make a module for linux that catches the L4 syscalls and throws them back into user-space. That way a L4 environment could be setup within linux. It would be much like user-space-linux and would save a lot of reboots just to test out a few bytes of code. On the other hand, inside L4 you could do the same with OSF / BSD / Linux syscalls and thus run their binaries under L4. (You want to run Netscape under L4? Or Mathematica? Or something as simple as xemacs and gcc?) A l4-linux for alpha would also need those changes (if any) I believe. MfG Goswin

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RE: L4/Alpha palcodes
by Sebastian Schoenberg 22 Jan '02

22 Jan '02

Yes, they were set to numbers which do not conflict with OSF/Linux/WinNT. A PALcall instuction is coded as cmd (6 bits) = 0, number (26 bits). There are two ways of calling PALcode: A direct way, where a certain address is called, or an indirect way, which must examine the calling instruction to jump to the right place. All L4Alpha PALcalls are located at the end of direct-callable PALcalls, hence they are fast and do not conflict with any other system Seb > -----Original Message----- > From: Daniel Potts [mailto:danielp@cse.unsw.edu.au] > Sent: Dienstag, 22. Januar 2002 09:50 > To: Goswin Brederlow > Cc: l4-hackers(a)os.inf.tu-dresden.de > Subject: Re: L4/Alpha palcodes > > > On 22 Jan 2002, Goswin Brederlow wrote: > > > Hi, > > > > I hope this is the right place, havent read anything here for ages. > > > > > > I was wondering whether the palcodes used by L4 on Alpha > are disjunct > > to the ones used by OSF / BSD / Linux. > > yes they are. An exception is l4_whoami which is an > experimental syscall anyway. I think it maps directly to the > OSF whoami call. > > > > > If not could they be made disjunct? > > > > > > The idea I have in mind is to make a module for linux that > catches the > > L4 syscalls and throws them back into user-space. That way a L4 > > environment could be setup within linux. It would be much like > > user-space-linux and would save a lot of reboots just to test out a > > few bytes of code. > > heh :) That would be an interesting project. I'd be > interested to know how (if) you will deal with device > drivers, memory etc. > > > On the other hand, inside L4 you could do the same with OSF / BSD / > > Linux syscalls and thus run their binaries under L4. (You > want to run > > Netscape under L4? Or Mathematica? Or something as simple as xemacs > > and gcc?) > > > > > > A l4-linux for alpha would also need those changes (if any) > I believe. > > Yes that is how we would run unmodified Linux/Alpha binaries on L4.. > > Cheers, > Daniel > > _______________________________________________ > l4-hackers mailing list > l4-hackers(a)os.inf.tu-dresden.de > http://os.inf.tu-> dresden.de/mailman/listinfo/l4-hackers >

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L4\UltraSPARCIIi?
by Crusher 20 Jan '02

20 Jan '02

I'm a graduate student at CSUS (California State University Sacramento). I was looking around the Internet for a Master's Project. I decided that since no one has ported L4 to the UltraSPARCIIi I would attempt it (as this is my first kernel, I'm not expecting too much), especially since the school has plenty of Sun machines around. I do already have a Sun Ultra 5 workstation and the development environment just about setup. Before I really started in on my project, I just wanted to make sure that a L4 port to the UltraSPARC isn't in the works or has been completed. Otherwise, I was hoping someone has done system work with the UltraSPARC and would be willing answer some of my UltraSPARC specific technical questions that I know will come up. Scott Tanaka

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OSKit-Problems with newer glibc
by imi＠inf.tu-dresden.de 17 Jan '02

17 Jan '02

Hi Are there any reported solutions for compiling the oskit1.0 that comes with l4 with installed glibc 2.2.4 or newer? On my machine (Debian "sid", gcc 2.95.4) it throw a linker error while linking unix/linux/sbrk-hack.o together with libc.a because duplicate symbol __libc_multiple_libcs. The sbrk-hack's only purpose seems to be defining these global variable (as an int). Maybe this was an error in libc and got fixed in 2.2.4? However when I compiled under glibc 2.1.3-10 (and gcc 2.95.2) it works... -- Immanuel Scholz, PGP: (Work 0x9216F1E7, Home 0x3B5DC02D)

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