gdb/x86: Handle kernels using compact xsave format

[deliverable/binutils-gdb.git] / gdb / ChangeLog

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
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+2018-05-08  Andrew Burgess  <andrew.burgess@embecosm.com>
+
+       * common/x86-xstate.h (I387_FCTRL_INIT_VAL): New constant.
+       (I387_MXCSR_INIT_VAL): New constant.
+       * amd64-tdep.c (amd64_supply_xsave): Only read state from xsave
+       buffer if it was supplied by the inferior.
+       * i387-tdep.c (i387_supply_fsave): Use I387_MXCSR_INIT_VAL.
+       (i387_xsave_get_clear_bv): New function.
+       (i387_supply_xsave): Only read x87 control registers from the
+       xsave buffer if the feature is enabled, and the state will have
+       been written, otherwise, provide a suitable default.
+       (i387_collect_xsave): Pre-clear all registers in xsave buffer,
+       including x87 control registers.  Update control registers if they
+       have changed from the default value, and mark features as enabled
+       as required.
+       * i387-tdep.h (i387_xsave_get_clear_bv): Declare.
+
 2018-05-08  Ulrich Weigand  <uweigand@de.ibm.com>
 
        * spu-tdep.c (info_spu_event_command): Fix output formatting.