Laurent Vivier <laur...@vivier.eu> writes:
> 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> Are you going to take this through your tree or do you want me to add it to my small pile of gdbstub fixes? -- Alex Bennée
