Le 20/04/2020 à 16:01, frederic.kon...@adacore.com a écrit : > From: KONRAD Frederic <frederic.kon...@adacore.com> > > Currently "cf-core.xml" is sent to GDB when using any m68k flavor. Thing is > it uses the "org.gnu.gdb.coldfire.core" feature name and gdb 8.3 then expects > a coldfire FPU instead of the default m68881 FPU. > > This is not OK because the m68881 floats registers are 96 bits wide so it > crashes GDB with the following error message: > > (gdb) target remote localhost:7960 > Remote debugging using localhost:7960 > warning: Register "fp0" has an unsupported size (96 bits) > warning: Register "fp1" has an unsupported size (96 bits) > ... > Remote 'g' packet reply is too long (expected 148 bytes, got 180 bytes): \ > 00000000000[...]0000 > > With this patch: qemu-system-m68k -M none -cpu m68020 -s -S > > (gdb) tar rem :1234 > Remote debugging using :1234 > warning: No executable has been specified and target does not support > determining executable automatically. Try using the "file" command. > 0x00000000 in ?? () > (gdb) p $fp0 > $1 = nan(0xffffffffffffffff) > > Signed-off-by: KONRAD Frederic <frederic.kon...@adacore.com> > --- > configure | 2 +- > gdb-xml/m68k-core.xml | 29 +++++++++++++++++++++++++++++ > target/m68k/cpu.c | 30 +++++++++++++++++++++++++----- > 3 files changed, 55 insertions(+), 6 deletions(-) > create mode 100644 gdb-xml/m68k-core.xml > > diff --git a/configure b/configure > index 23b5e93..2b07b85 100755 > --- a/configure > +++ b/configure > @@ -7825,7 +7825,7 @@ case "$target_name" in > ;; > m68k) > bflt="yes" > - gdb_xml_files="cf-core.xml cf-fp.xml m68k-fp.xml" > + gdb_xml_files="cf-core.xml cf-fp.xml m68k-core.xml m68k-fp.xml" > TARGET_SYSTBL_ABI=common > ;; > microblaze|microblazeel) > diff --git a/gdb-xml/m68k-core.xml b/gdb-xml/m68k-core.xml > new file mode 100644 > index 0000000..5b092d2 > --- /dev/null > +++ b/gdb-xml/m68k-core.xml > @@ -0,0 +1,29 @@ > +<?xml version="1.0"?> > +<!-- Copyright (C) 2008 Free Software Foundation, Inc. > + > + Copying and distribution of this file, with or without modification, > + are permitted in any medium without royalty provided the copyright > + notice and this notice are preserved. --> > +<!DOCTYPE feature SYSTEM "gdb-target.dtd"> > +<feature name="org.gnu.gdb.m68k.core">
So I guess you should also update feature name in gdb-xml/m68k-fp.xml ? Thanks, Laurent
