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Re: Add private syscalls to support NPTL

Finn Thain wrote:

On Fri, 6 Nov 2009, Maxim Kuvyrkov wrote:

Finn Thain wrote:
On Wed, 28 Oct 2009, Maxim Kuvyrkov wrote:


We [CodeSourcery] have just updated all of our toolchains, and the GNU/Linux toolchain is based on EGLIBC 2.10 and has well tested TLS/NPTL support. If you are targeting ColdFire you can simply download the toolchain at <http://www.codesourcery.com/sgpp/lite/coldfire>.
I did run into a problem with this second patch. It doesn't apply to the eglibc_2.10 branch in svn as of yesterday. The following hunk is the problem:
The patches posted are all against FSF GLIBC, not EGLIBC, so some conflicts are expected. ...

OK. I suppose that means no back-porting of other patches is required.

Using the above patches, I am almost able to compile eglibc_2.10. But there is an old build failure (since glibc-2.4 I think) when linking libc.so:

/tmp/build/glibc-m68k-linux-gnu-3/libc_pic.os: In function `fchownat':
(.text+0x911c2): undefined reference to `__atfct_seterrno'
/tmp/build/glibc-m68k-linux-gnu-3/libc.so: hidden symbol `__atfct_seterrno'
isn't defined
final link failed: Nonrepresentable section on output
collect2: ld returned 1 exit status
make[1]: *** [/tmp/build/glibc-m68k-linux-gnu-3/libc.so] Error 1
make[1]: Leaving directory `/tmp/build/glibc-2.10.1'
make: *** [all] Error 2

To try to fix this issue, I've basically copied this patch:
http://sources.redhat.com/ml/libc-hacker/2006-08/msg00004.html An m68k version is attached. Can someone have a look at it and tell whether this is the correct fix or not?
I don't really know, this is the first time I see this failure.

I found out why it happens.

If you build eglibc with "--enable-kernel=2.6.31" it fails as above.
If you omit that option, it works.

Do you think my patch is a reasonable solution? I don't understand it, I just copied it from x86 -- "monkey see, monkey do."

I can't spot anything wrong in it.

I used the eglibc-2.10/EGLIBC.cross-building script to test this. I configured eglibc with "--enable-add-ons=ports,nptl" to prevent localedef from breaking the configure step. Package versions were binutils-2.19.51, gcc-4.4.1 (patched), linux-2.6.31 (patched), eglibc 2_10 branch (patched).

What hardware / emulator do you use to test the result? I tested all the work on ColdFire systems, but I also would like to run some tests on a usual m68k.


Maxim Kuvyrkov
(650) 331-3385 x724

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