Re: [Qemu-devel] QEMU on SPARC host - Summary and suggested vl.c PATCH

[Richard Zidlicky]

On Wed, Sep 01, 2004 at 04:57:51AM +0200, Bochnig, Martin wrote:
> (now in its own thread)
> 
> Hi,

> 
> Now we SPARC-host users are on the horns of a dilemma: QEMU's existing 
> SPARC support is optimized for SPARCv7 only.
> While we are required to build for v9 / SPARC64, the build process gives 
> tons of errors caused by invalid type definitions/invalid size castings 
> and doesn't complete.
> The whole sources may need to be adjusted (by a real hacker, not me).
> I edited Makefile.target, Makefile and configure and tested several 
> '-mcpu=' and '-m32' vs. '-m64' settings - including '-mcpu=ultrasparc 
> -m32' which is to produce so called sparcv8plus ELF 32 binaries.
> I tried to build statically.
> I enabled bigendian and gprof in 'configure'.
> The build did NEVER complete with '-mcpu=ultrasparc' - no matter how all 
> the other variations looked like.
> So I could never test or even tune my theoretical %tick code (BTW: The 
> vl.o object builds fine).
> op.o seemed to be broken and dyngen complained and was unable to 
> generate op.h. :-((
> 
> ../dyngen -o op.h op.o
> dyngen: ret; restore; not found at end of op_setbe_T0_subl

so look at the code generated for op_setbe_T0_subl in op.o,
eg objdump -S op.o. 
Chances are that you have forgotten some no-reorder-block or 
noomit-fp compiler flags. Or the instructions have been
reordered in some new way by the compiler or some V9 specific
opcode. Just figure out what the compiler does instead of
"ret; restore" and strip off these instructions.

Richard