Compiling with 2.6.25-rc2 with binutils 2.17 fails?

Compiling with 2.6.25-rc2 with binutils 2.17 fails?

[Rob Landley]

Is anybody else having trouble compiling the kernel with binutils 2.17?

The build does this:
>   VDSOSYM arch/x86/vdso/vdso32-syms.lds
> --- -   Fri Feb 15 23:38:41 2008
> +++ arch/x86/vdso/vdso32-int80-syms.lds Fri Feb 15 23:38:41 2008
> @@ -0,0 +1,5 @@
> +VDSO32_PRELINK = 0x0;
> +VDSO32_rt_sigreturn = 0x040c;
> +VDSO32_sigreturn = 0x0400;
> +VDSO32_vsyscall = 0x0414;
> +VDSO32_vsyscall_eh_frame_size = 0x040;
> make[1]: *** [arch/x86/vdso/vdso32-syms.lds] Error 1
> make: *** [arch/x86/vdso] Error 2
> make: *** Waiting for unfinished jobs....

Still trying to track down why, but it works on a toolchain built from 
binutils 2.18 and gcc 4.1.3, but not with a toolchain from binutils 2.17 and 
gcc 4.1.2.  And considering where it's failing...

If binutils 2.18 is the only version that now builds the kernel, could we 
update Documentaiton/Changes to say that instead of 2.12?

Rob
-- 
"One of my most productive days was throwing away 1000 lines of code."
  - Ken Thompson.

Re: Compiling with 2.6.25-rc2 with binutils 2.17 fails?

[Jan Engelhardt]

On Feb 16 2008 17:27, Rob Landley wrote:
>The build does this:
>>   VDSOSYM arch/x86/vdso/vdso32-syms.lds
>> --- -   Fri Feb 15 23:38:41 2008
>> +++ arch/x86/vdso/vdso32-int80-syms.lds Fri Feb 15 23:38:41 2008
>> @@ -0,0 +1,5 @@
>> +VDSO32_PRELINK = 0x0;
>> +VDSO32_rt_sigreturn = 0x040c;
>> +VDSO32_sigreturn = 0x0400;
>> +VDSO32_vsyscall = 0x0414;
>> +VDSO32_vsyscall_eh_frame_size = 0x040;
>> make[1]: *** [arch/x86/vdso/vdso32-syms.lds] Error 1
>> make: *** [arch/x86/vdso] Error 2
>> make: *** Waiting for unfinished jobs....
>
>Still trying to track down why, but it works on a toolchain built from 
>binutils 2.18 and gcc 4.1.3, but not with a toolchain from binutils 2.17 and 
>gcc 4.1.2.  And considering where it's failing...
>
>If binutils 2.18 is the only version that now builds the kernel, could we 
>update Documentaiton/Changes to say that instead of 2.12?

I have, as part of opensuse, binutils 2.17.50 and gcc 4.2.1 and that 
works fine.

Re: Compiling with 2.6.25-rc2 with binutils 2.17 fails?

[Roland McGrath]

> Still trying to track down why, but it works on a toolchain built from 
> binutils 2.18 and gcc 4.1.3, but not with a toolchain from binutils 2.17 and 
> gcc 4.1.2.  And considering where it's failing...

I don't think the vdso magic should require so new a binutils.  Please try
to figure out which of the steps is producing different results between the
two tool setups.


Thanks,
Roland

Re: Compiling with 2.6.25-rc2 with binutils 2.17 fails?

[Rob Landley]

On Sunday 17 February 2008 21:09:10 Roland McGrath wrote:
> > Still trying to track down why, but it works on a toolchain built from
> > binutils 2.18 and gcc 4.1.3, but not with a toolchain from binutils 2.17
> > and gcc 4.1.2.  And considering where it's failing...
>
> I don't think the vdso magic should require so new a binutils.  Please try
> to figure out which of the steps is producing different results between the
> two tool setups.

I'm poking at it.  Something in my cross compiling setup is driving this bit 
screwy:

  i686-nm arch/x86/vdso/vdso32-sysenter.so.dbg | 
sed -n -e 's/^00*/0/' -e 's/^\([0-9a-fA-F]*\) . \(VDSO[a-zA-Z0-9_]*\)$/ = 
0x;/p' | LC_ALL=C sort > arch/x86/vdso/vdso32-sysenter-syms.lds
        if LC_ALL=C sort -u arch/x86/vdso/vdso32-int80-syms.lds 
arch/x86/vdso/vdso32-sysenter-syms.lds > arch/x86/vdso/.tmp_vdso32-syms.lds 
&&  if grep -q VDSO32_SYSENTER_RETURN arch/x86/vdso/vdso32-int80-syms.lds; 
then diff -u arch/x86/vdso/.tmp_vdso32-syms.lds 
arch/x86/vdso/vdso32-int80-syms.lds; else sed /VDSO32_SYSENTER_RETURN/d 
arch/x86/vdso/.tmp_vdso32-syms.lds | diff -u - 
arch/x86/vdso/vdso32-int80-syms.lds; fi &&  if grep -q VDSO32_SYSENTER_RETURN 
arch/x86/vdso/vdso32-sysenter-syms.lds; then diff -u 
arch/x86/vdso/.tmp_vdso32-syms.lds arch/x86/vdso/vdso32-sysenter-syms.lds; 
else sed /VDSO32_SYSENTER_RETURN/d arch/x86/vdso/.tmp_vdso32-syms.lds | 
diff -u - arch/x86/vdso/vdso32-sysenter-syms.lds; fi && : ; then mv -f 
arch/x86/vdso/.tmp_vdso32-syms.lds arch/x86/vdso/vdso32-syms.lds; else rm -f 
arch/x86/vdso/.tmp_vdso32-syms.lds; exit 1; fi
--- -   Sun Feb 17 20:24:03 2008
+++ arch/x86/vdso/vdso32-int80-syms.lds Sun Feb 17 20:24:03 2008
@@ -0,0 +1,5 @@
+VDSO32_PRELINK = 0x0;
+VDSO32_rt_sigreturn = 0x040c;
+VDSO32_sigreturn = 0x0400;
+VDSO32_vsyscall = 0x0414;
+VDSO32_vsyscall_eh_frame_size = 0x040;
make[1]: *** [arch/x86/vdso/vdso32-syms.lds] Error 1
make: *** [arch/x86/vdso] Error 2

If binutils is involved, it's due to i686-nm...

I'm still trying to puzzle out the "if thing && thing &&:; then" syntax above.  
Never encountered that one before...  A colon?  I'll try to bang on it some 
more tomorrow, it's gone 4am on me...

> Thanks,
> Roland

Rob
-- 
"One of my most productive days was throwing away 1000 lines of code."
  - Ken Thompson.

Re: Compiling with 2.6.25-rc2 with binutils 2.17 fails?

[Roland McGrath]

> I'm poking at it.  Something in my cross compiling setup is driving this bit 
> screwy:
> 
>   i686-nm arch/x86/vdso/vdso32-sysenter.so.dbg | 

Show me the output of just this.

> sed -n -e 's/^00*/0/' -e 's/^\([0-9a-fA-F]*\) . \(VDSO[a-zA-Z0-9_]*\)$/ = 
> 0x;/p' | LC_ALL=C sort > arch/x86/vdso/vdso32-sysenter-syms.lds

Also show me the vdso32-sysenter-syms.lds file.


Thanks,
Roland

Re: Compiling with 2.6.25-rc2 with binutils 2.17 fails?

[Rob Landley]

[-- Attachment #1: Type: text/plain, Size: 564 bytes --]

On Monday 18 February 2008 12:40:37 Roland McGrath wrote:
> > I'm poking at it.  Something in my cross compiling setup is driving this
> > bit screwy:
> >
> >   i686-nm arch/x86/vdso/vdso32-sysenter.so.dbg |
>
> Show me the output of just this.

Attached.

> > sed -n -e 's/^00*/0/' -e 's/^\([0-9a-fA-F]*\) . \(VDSO[a-zA-Z0-9_]*\)$/ =
> > 0x;/p' | LC_ALL=C sort > arch/x86/vdso/vdso32-sysenter-syms.lds
>
> Also show me the vdso32-sysenter-syms.lds file.

Attached.

Rob
-- 
"One of my most productive days was throwing away 1000 lines of code."
  - Ken Thompson.

[-- Attachment #2: nm-out.txt --]
[-- Type: text/plain, Size: 449 bytes --]

0000000000000360 a _DYNAMIC
00000000000003d8 a _GLOBAL_OFFSET_TABLE_
000000000000040c T __kernel_rt_sigreturn
0000000000000400 T __kernel_sigreturn
0000000000000414 T __kernel_vsyscall
0000000000000000 A LINUX_2.5
0000000000000000 a VDSO32_PRELINK
000000000000040c t VDSO32_rt_sigreturn
0000000000000400 t VDSO32_sigreturn
0000000000000424 t VDSO32_SYSENTER_RETURN
0000000000000414 t VDSO32_vsyscall
0000000000000040 a VDSO32_vsyscall_eh_frame_size

[-- Attachment #3: vdso32-sysenter-syms.lds --]
[-- Type: text/plain, Size: 177 bytes --]

VDSO32_PRELINK = 0x0;
VDSO32_SYSENTER_RETURN = 0x0424;
VDSO32_rt_sigreturn = 0x040c;
VDSO32_sigreturn = 0x0400;
VDSO32_vsyscall = 0x0414;
VDSO32_vsyscall_eh_frame_size = 0x040;

Re: Compiling with 2.6.25-rc2 with binutils 2.17 fails?

[Roland McGrath]

> > > sed -n -e 's/^00*/0/' -e 's/^\([0-9a-fA-F]*\) . \(VDSO[a-zA-Z0-9_]*\)$/ =
> > > 0x;/p' | LC_ALL=C sort > arch/x86/vdso/vdso32-sysenter-syms.lds
> >
> > Also show me the vdso32-sysenter-syms.lds file.
> 
> Attached.

The contents of this file are fine.  If all the vdso32-*-syms.lds files
look sane, then your problem is just with the shell commands (cmd_vdso32sym)
that compare them.


Thanks,
Roland