Re: [Qemu-devel] [PATCH v3] tests/migration: Add source to PC boot block

["Dr. David Alan Gilbert" <dgilbert@redhat.com>]

* Eric Blake (eblake@redhat.com) wrote:
> On 02/12/2018 12:34 PM, Dr. David Alan Gilbert (git) wrote:
> > From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
> > 
> > The boot block used in the migration test is currently only
> > shipped as a hex (with the source in the git commit message),
> 
> Would be nice to point to commit ea0c6d62 (I assume that's the commit
> message you're referring to).

Done.

> > change this to actually include the source.
> 
> Yeah, GPL really wants us to ship the preferred editing form of sources ;)
> 
> > 
> > A script is added to rebuild the header but the expectation is that
> > the generated hex is shipped as well as the .s, so that
> > there's no requirement to have just the right assembler etc.
> > 
> > Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
> > ---
> 
> > +++ b/tests/migration-test.c
> > @@ -80,57 +80,13 @@ static const char *tmpfs;
> >   /* A simple PC boot sector that modifies memory (1-100MB) quickly
> >    * outputing a 'B' every so often if it's still running.
> 
> Pre-existing, but while here,
> s/outputing/outputting/

Extra 't'

> > diff --git a/tests/migration/rebuild-x86-bootblock.sh b/tests/migration/rebuild-x86-bootblock.sh
> > new file mode 100755
> > index 0000000000..ee9b53ceb4
> > --- /dev/null
> > +++ b/tests/migration/rebuild-x86-bootblock.sh
> > @@ -0,0 +1,35 @@
> > +#!/bin/sh
> > +# Copyright (c) 2016 Red Hat, Inc. and/or its affiliates
> > +# This work is licensed under the terms of the GNU GPL, version 2 or later.
> > +# See the COPYING file in the top-level directory.
> > +#
> > +# Author: dgilbert@redhat.com
> > +
> > +ASMFILE=$PWD/tests/migration/x86-a-b-bootblock.s
> > +HEADER=$PWD/tests/migration/x86-a-b-bootblock.h
> > +
> > +if [ ! -e "$ASMFILE" ]
> > +then
> > +  echo "Couldn't find $ASMFILE" >&2
> > +  exit 1
> > +fi
> > +
> > +ASM_WORK_DIR=$(mktemp -d --tmpdir X86BB.XXXXX)
> Portable use of mktemp requires at least 6 X, not 5.

Extra 'X'

> > +cd $ASM_WORK_DIR &&
> 
> Unsafe if $PWD contains spaces; needs to be quoted.

Done.

> > +as --32 -march=i486 "$ASMFILE" -o x86.o &&
> > +objcopy -O binary x86.o x86.boot &&
> > +dd if=x86.boot of=x86.bootsect \
> > +  bs=256 count=2 skip=124 &&
> > +xxd -i x86.bootsect |
> > +sed -e 's/.*int.*//' > x86.hex &&
> > +cat - x86.hex <<HERE > "$HEADER"
> > +/* This file is automatically generated from
> > + * tests/migration/x86-a-b-bootblock.s, edit that and then run
> > + * tests/migration/rebuild-x86-bootblock.sh to update,
> > + * and then remember to send both in your patch submission.
> > + */
> > +HERE
> > +
> > +rm x86.hex x86.bootsect x86.boot x86.o
> > +cd .. && rmdir $ASM_WORK_DIR
> 
> Another place that needs quoting.

Done.

> > +++ b/tests/migration/x86-a-b-bootblock.s
> > @@ -0,0 +1,92 @@
> > +# x86 bootblock used in migration test
> > +#  repeatedly increments the first byte of each page in a 100MB
> > +#  range.
> > +#  Outputs an initial 'A' on serial followed by repeated 'B's
> > +#
> > +# run   tests/migration/rebuild-x86-bootblock.sh
> > +#   to regenerate the hex, and remember to include both the .h and .s
> > +#   in any patches.
> > +#
> > +# Copyright (c) 2016 Red Hat, Inc. and/or its affiliates
> 
> Do you want to add 2018, since you've now modified things since the original
> commit?

Done.

Dave

> -- 
> Eric Blake, Principal Software Engineer
> Red Hat, Inc.           +1-919-301-3266
> Virtualization:  qemu.org | libvirt.org
--
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK