Re: [Qemu-devel] Problem with PPC user emulation.

[Jocelyn Mayer <l_indien@magic.fr>]

On Fri, 2004-05-14 at 19:59, Karel Gardas wrote:
> Hello,
> 
> I've tried PPC user emulation provided by this week source tree, but w/o
> success. I've tested crosstool's 4 test binaries (hello world in c/c++
> static and dynamic) but all four crash with:
> 
> thinkpad:/mnt/karel/cross-gcc/result/powerpc-405-linux-gnu/gcc-3.4.0-glibc-2.3.2/tmp$ ppc.sh ./powerpc-405-linux-gnu-hello
> *** ERROR: idx a0 already assigned to a direct opcode
> *** ERROR: unable to join indirect table idx [a0-37]
> *** ERROR initializing PPC instruction 0xa0 0x37 0xfe
> /opt/qemu-scripts/bin/ppc.sh: line 3:  3496 Segmentation fault      qemu-ppc -L /mnt/karel/cross-gcc/result/powerpc-405-linux-gnu/gcc-3.4.0-glibc-2.3.2/powerpc-405-linux-gnu/ $@
> thinkpad:/mnt/karel/cross-gcc/result/powerpc-405-linux-gnu/gcc-3.4.0-glibc-2.3.2/tmp$
> 
> I used crosstool-0.28-pre13 for building ppc crosscompiler which is
> gcc3.4.0 and glibc2.3.2 combination.
> 

What is your host machine ?
It seems there is a mess in the way sections are handled by this gcc 
version and/or for your host machine.
This seems clear to me, because there can be no instruction with this
opcode, as major opcode is 6 bits long in PPC and so can't be 0xa0.

Could you please send me the qemu binary by mail, so I could check the
executable structure (the opcode table structure, in fact...) ?

But you may not be able to execute PPC405 dedicated binaries,
as this CPU implements some instructions that aren't in the PPC spec
then not emulated by Qemu. Those instructions seem not to be used in the
program you tried, but you should check that you always compile with -mcpu=powerpc flag
(not -mcpu=405) to get only generic PPC code, in order to execute inside Qemu.

-- 
Jocelyn Mayer <l_indien@magic.fr>
Never organized