motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-02 23:33:54 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

target/m68k: fix gdb for m68xxx

Browse source 
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.konrad@adacore.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <1588094279-17913-3-git-send-email-frederic.konrad@adacore.com>
Message-Id: <20200430190122.4592-10-alex.bennee@linaro.org>
This commit is contained in:
KONRAD Frederic 2020-04-30 20:01:22 +01:00 • committed by Alex Bennée
parent df3ca22318
commit a976ed3ffd
3 changed files with 67 additions and 16 deletions
Download patch file Download diff file Expand all files Collapse all files

2
configure vendored
View file

@ -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)