Re: [Sablevm-developer] Instruction cache flush (non)portability

[Etienne M. G. <eti...@uq...>]

Hi Grzegorz,

Regarding the #include <linux/types.h> suggestion.

What is the license of <linux/types.h> ?  If it is the GPL, then we're ou=
t of=20
luck, as it would force us to GPL the whole SableVM code, and probably th=
e class=20
libraries too (making the Classpath exception useless).  I really hope it=
 is the=20
LGPL...

Did you investigate whether GNU libc had a similar include file?  GNU lib=
c is=20
LGPLed, and would cause no license related problems.

I know, these license things can seem quite annoying, but it's the right =
of the=20
copyright holder to determine the license terms on the code they write.

Etienne

Grzegorz Prokopski wrote:
> W li=B6cie z wto, 19-11-2002, godz. 18:23, Grzegorz Prokopski pisze:=20
>=20
>>Hi!
>=20
> I was a bit in a hurry, so see the corections below.
>=20
> (below paragraph is about already compiled binary version
> of sablevm which should survive upgrade of glibc, gcc etc.)
>=20
>>It's even more complicated if we link to that symbol and it's
>>definition changes. On i386 (and most of the arches) we're
>>_staticly_ linked to libgcc2 library (which contains the symbol).
>>Thus - we don't have to worry about gcc upgrades etc.
>>However on some arches, like m68k
>=20
> this lib (libgcc2) is dynamically linked with every program
>=20
>>- or so I was told
>=20
> =20
>=20
>>I personally would vote that we use this symbol in one of next
>>versions, after my old "every arch" patch is applied.
>=20
> Not sure yet, but it would be possible to use
> #include <linux/types.h>
> when available and fallback to autodetection when it fails.
>=20
> BTW: I was yet unable to actually test that __clear_cache
> function (sorry), because it does nothing for i386 and Bdale
> is very busy today so we haven't managed to test that for ia64
> yet :-/
>=20
> (I have assembler version for ia64 ready for another test anyway)
>=20
> 					GBP
>=20
>=20

--=20
Etienne M. Gagnon                    http://www.info.uqam.ca/~egagnon/
SableVM:                                       http://www.sablevm.org/
SableCC:                                       http://www.sablecc.org/