Re: [Qemu-devel] [PATCH] target-openrisc: Fix exception handling status registers

[Stafford Horne]

On Wed, Feb 01, 2017 at 10:15:54AM -0800, Richard Henderson wrote:
> On 02/01/2017 02:04 AM, Stafford Horne wrote:
> > On Thu, Jan 26, 2017 at 09:26:55AM -0800, Richard Henderson wrote:
> >> On 01/26/2017 05:12 AM, Stafford Horne wrote:
> >>> I just sent you a mail with a link to my kernel for download.
> >>>
> >>> One thing I noticed is you passed '-append console=ttyS0' I think that
> >>> does nothing on openrisc since as far as I know openrisc only gets boot
> >>> params from the device tree file. I tried with and without it and got no
> >>> differences.
> >>
> >> That was just reflex, wondering where the output went.
> >>
> >>> Another thing, I am using a 'late' version of gcc built with musl cross 
> >>> [1]
> >>> , I dont think it would make a difference, but maybe?
> >>
> >> I think that's likely the difference.  I can indeed boot your kernel.
> > 
> > Hi Richard,
> > 
> > For kernel builds I have created toolchain binaries here:
> > 
> >   http://shorne.noip.me/crosstool/files/bin/x86_64/5.4.0/
> > 
> > These should work.
> > 
> > If all is ok with the qemu patch I sent what is the next step to get them
> > incorporated.  Do you need any help from me?
> > 
> > ... Actually I just checked your branch on github, it looks like you are
> > doing a few updates.  Let me know if you want me to review anything.
> 
> Yes, I've been attempting to revive a patch set from 2013 that cleans up the
> implementation, fixing a few other bugs in the process.
> 
> However, testing it properly has been tricky.  It appears as if I'm debugging
> qemu and gcc simultaneously, while your gdb branch doesn't want to compile for
> me.  So I've been limited to instruction traces from qemu, which is slow 
> going.

What issue are you having compiling gdb?

I compile gdb with these flags.

  ../binutils-gdb/configure --target=or1k-musl-linux \
    --prefix=$PREFIX \
    --disable-itcl \
    --disable-tk \
    --disable-tcl \
    --disable-winsup \
    --disable-gdbtk \
    --disable-libgui \
    --disable-rda \
    --disable-sid \
    --with-sysroot \
    --disable-newlib \
    --disable-libgloss \
    --disable-gas \
    --disable-ld \
    --disable-binutils \
    --disable-gprof \
    --with-system-zlib

Also, I uploaded my binaries just in case:

  http://shorne.noip.me/crosstool/files/bin/x86_64/5.4.0/

My host gcc is "6.3.1 20161221", I used musl-cross and my gdb branch

  https://github.com/openrisc/musl-cross.git or1k

  address@hidden:stffrdhrn/binutils-gdb.git or1k-upstream

> If you'd like to do your own testing on my tgt-or1k-2 branch, that would be
> appreciated.

I will have a look tomorrow if I can.

-Stafford