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* RE: Cross compile kernel w/ buildroot toolchain
@ 2006-03-13 21:07 ` Kurt Schwemmer
  0 siblings, 0 replies; 14+ messages in thread
From: Kurt Schwemmer @ 2006-03-13 21:07 UTC (permalink / raw)
  To: Ralf Baechle; +Cc: linux-mips

I didn't touch any of the source yet. 

I'm downloading the 1/10/05 2.6.15 tarball (
ftp://ftp.linux-mips.org/pub/linux/mips/kernel/v2.6/linux-2.6.15.tar.gz
)now to see if that fixes things.

In response to Thiemo's message the error with (V=1) is:

make -f scripts/Makefile.build obj=arch/mips/kernel
  /klocal/buildroot/build_mipsel/staging_dir/bin/mipsel-linux-gcc
-Wp,-MD,arch/mips/kernel/.entry.o.d  -nostdinc -isystem
/klocal/buildroot/build_mipsel/staging_dir/bin-ccache/../lib/gcc/mipsel-
linux-uclibc/3.4.5/include -D__KERNEL__ -Iinclude  -D__ASSEMBLY__  -I
/usr/local/src/linux-2.6/include/asm/gcc -G 0 -mno-abicalls -fno-pic
-pipe  -finline-limit=100000 -mabi=32 -march=mips32r2 -Wa,-32
-Wa,-march=mips32r2 -Wa,-mips32r2 -Wa,--trap
-Iinclude/asm-mips/mach-mips -Iinclude/asm-mips/mach-generic -Wall
-Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common
-ffreestanding -O2     -fomit-frame-pointer  -I
/usr/local/src/linux-2.6/include/asm/gcc -G 0 -mno-abicalls -fno-pic
-pipe  -finline-limit=100000 -mabi=32 -march=mips32r2 -Wa,-32
-Wa,-march=mips32r2 -Wa,-mips32r2 -Wa,--trap
-Iinclude/asm-mips/mach-mips -Iinclude/asm-mips/mach-generic    -c -o
arch/mips/kernel/entry.o arch/mips/kernel/entry.S
arch/mips/kernel/entry.S: Assembler messages:
arch/mips/kernel/entry.S:157: Error: opcode not supported on this
processor: mips32 (mips32) `jr.hb $31'
make[1]: *** [arch/mips/kernel/entry.o] Error 1
make: *** [arch/mips/kernel] Error 2

Also, assembler -v output:
GNU assembler version 2.16.1 (mipsel-linux-uclibc) using BFD version
2.16.1

Thanks,
Kurt Schwemmer

> -----Original Message-----
> From: Ralf Baechle [mailto:ralf@linux-mips.org] 
> Sent: Monday, March 13, 2006 1:57 PM
> To: Kurt Schwemmer
> Cc: linux-mips@linux-mips.org
> Subject: Re: Cross compile kernel w/ buildroot toolchain
> 
> On Mon, Mar 13, 2006 at 01:39:53PM -0700, Kurt Schwemmer wrote:
> 
> > I got 2.6.15 "a while back" (>1 month). 
> > 
> > I'll try getting the most recent source. Sorry, I avoided 
> this due to 
> > my company blocking rsync and thus making it a pain to get 
> the sources...
> 
> The reason your case is odd is that the kernel only uses a 
> single jr.hb instruction which is in the instruction_hazard() 
> macro in include/asm-mips/hazards.h.  This macro first of all 
> is a gcc inline assembler macro and also wraps the jr.hb 
> instruction between .set mips64r2 ... .set mips0, so you 
> should never ever get an error message.  And you're getting 
> an error message for entry.S, an assembler file.  Seems you 
> must have done some not so kosher changes to that tree?
> 
>   Ralf
> 

^ permalink raw reply	[flat|nested] 14+ messages in thread
* RE: Cross compile kernel w/ buildroot toolchain
@ 2006-03-13 22:03 ` Kurt Schwemmer
  0 siblings, 0 replies; 14+ messages in thread
From: Kurt Schwemmer @ 2006-03-13 22:03 UTC (permalink / raw)
  To: Ralf Baechle; +Cc: linux-mips

Getting the _very_ latest source fixed my problem. I can now build the
kernel with the cross compiler that buildroot builds. Thanks to all who
offered advice!

Thanks,
Kurt Schwemmer 

> -----Original Message-----
> From: Ralf Baechle [mailto:ralf@linux-mips.org] 
> Sent: Monday, March 13, 2006 1:57 PM
> To: Kurt Schwemmer
> Cc: linux-mips@linux-mips.org
> Subject: Re: Cross compile kernel w/ buildroot toolchain
> 
> On Mon, Mar 13, 2006 at 01:39:53PM -0700, Kurt Schwemmer wrote:
> 
> > I got 2.6.15 "a while back" (>1 month). 
> > 
> > I'll try getting the most recent source. Sorry, I avoided 
> this due to 
> > my company blocking rsync and thus making it a pain to get 
> the sources...
> 
> The reason your case is odd is that the kernel only uses a 
> single jr.hb instruction which is in the instruction_hazard() 
> macro in include/asm-mips/hazards.h.  This macro first of all 
> is a gcc inline assembler macro and also wraps the jr.hb 
> instruction between .set mips64r2 ... .set mips0, so you 
> should never ever get an error message.  And you're getting 
> an error message for entry.S, an assembler file.  Seems you 
> must have done some not so kosher changes to that tree?
> 
>   Ralf
> 

^ permalink raw reply	[flat|nested] 14+ messages in thread
* RE: Cross compile kernel w/ buildroot toolchain
@ 2006-03-13 20:39 ` Kurt Schwemmer
  0 siblings, 0 replies; 14+ messages in thread
From: Kurt Schwemmer @ 2006-03-13 20:39 UTC (permalink / raw)
  To: Ralf Baechle; +Cc: linux-mips

I got 2.6.15 "a while back" (>1 month). 

I'll try getting the most recent source. Sorry, I avoided this due to my
company blocking rsync and thus making it a pain to get the sources... 

Thanks,
Kurt

> -----Original Message-----
> From: Ralf Baechle [mailto:ralf@linux-mips.org] 
> Sent: Monday, March 13, 2006 1:33 PM
> To: Kurt Schwemmer
> Cc: linux-mips@linux-mips.org
> Subject: Re: Cross compile kernel w/ buildroot toolchain
> 
> On Mon, Mar 13, 2006 at 01:17:09PM -0700, Kurt Schwemmer wrote:
> 
> > I'm trying to figure out a toolchain to use for my system. I can 
> > compile the kernel just fine using the MIPS SDE based distribution, 
> > but you can't cross compile apps with that. I downloaded and built 
> > buildroot and I'm trying to (cross) compile the kernel with it too 
> > (I'd like to just use one compiler for everything). I had 
> it use gcc 
> > 3.4.5. When I try to compile the kernel with:
> > 
> > make
> > CROSS_COMPILE=~/buildroot/build_mipsel/staging_dir/bin/mipsel-linux-
> > 
> > I eventually get an error while assembling entry.o:
> >   AS      arch/mips/kernel/entry.o
> > arch/mips/kernel/entry.S: Assembler messages:
> > arch/mips/kernel/entry.S:157: Error: opcode not supported on this
> > processor: mips32 (mips32) `jr.hb $31'
> > make[1]: *** [arch/mips/kernel/entry.o] Error 1
> > make: *** [arch/mips/kernel] Error 2
> > 
> > I guess this is a "hazard barrier" instruction. Why doesn't 
> gcc 3.4.5 
> > know about it? What do I need to do to get this to work?
> 
> I'm looking at the latest kernel sources and can't see how 
> this could be happening.  Which version of the kernel are you 
> trying to build?
> 
>   Ralf
> 

^ permalink raw reply	[flat|nested] 14+ messages in thread
* Cross compile kernel w/ buildroot toolchain
@ 2006-03-13 20:17 ` Kurt Schwemmer
  0 siblings, 0 replies; 14+ messages in thread
From: Kurt Schwemmer @ 2006-03-13 20:17 UTC (permalink / raw)
  To: linux-mips

I'm trying to figure out a toolchain to use for my system. I can compile
the kernel just fine using the MIPS SDE based distribution, but you
can't cross compile apps with that. I downloaded and built buildroot and
I'm trying to (cross) compile the kernel with it too (I'd like to just
use one compiler for everything). I had it use gcc 3.4.5. When I try to
compile the kernel with:

make
CROSS_COMPILE=~/buildroot/build_mipsel/staging_dir/bin/mipsel-linux-

I eventually get an error while assembling entry.o:
  AS      arch/mips/kernel/entry.o
arch/mips/kernel/entry.S: Assembler messages:
arch/mips/kernel/entry.S:157: Error: opcode not supported on this
processor: mips32 (mips32) `jr.hb $31'
make[1]: *** [arch/mips/kernel/entry.o] Error 1
make: *** [arch/mips/kernel] Error 2

I guess this is a "hazard barrier" instruction. Why doesn't gcc 3.4.5
know about it? What do I need to do to get this to work?

Thanks,
Kurt Schwemmer

^ permalink raw reply	[flat|nested] 14+ messages in thread
end of thread, other threads:[~2006-03-13 21:55 UTC | newest]

Thread overview: 14+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2006-03-13 21:07 Cross compile kernel w/ buildroot toolchain Kurt Schwemmer
2006-03-13 21:07 ` Kurt Schwemmer
2006-03-13 21:16 ` David Daney
2006-03-13 21:25 ` Thiemo Seufer
  -- strict thread matches above, loose matches on Subject: below --
2006-03-13 22:03 Kurt Schwemmer
2006-03-13 22:03 ` Kurt Schwemmer
2006-03-13 20:39 Kurt Schwemmer
2006-03-13 20:39 ` Kurt Schwemmer
2006-03-13 20:45 ` Ralf Baechle
2006-03-13 20:56 ` Ralf Baechle
2006-03-13 20:17 Kurt Schwemmer
2006-03-13 20:17 ` Kurt Schwemmer
2006-03-13 20:33 ` Ralf Baechle
2006-03-13 20:48 ` Thiemo Seufer

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