Le 28/04/2020 à 19:17, KONRAD Frederic a écrit : > 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 | 52 > ++++++++++++++++++++++++++++++++++++--------------- > 3 files changed, 67 insertions(+), 16 deletions(-) > create mode 100644 gdb-xml/m68k-core.xml
Reviewed-by: Laurent Vivier <laur...@vivier.eu>
