Changeset 5301

Timestamp:

Oct 5, 2006, 2:20:32 PM (18 years ago)

Author:

Gary Byers

Message:

* empty log message *

File:

• trunk/ccl/ChangeLog (modified) (1 diff)

trunk/ccl/ChangeLog

@@ +1 @@
+2006-10-05 14:46  gb
+
+        * lisp-kernel/lisptypes.h: More register name aliases.  FMH.
+
+2006-10-05 14:46  gb
+
+        * lisp-kernel/x86-asmutils64.s: get_mxcsr, set_mxcsr.
+
+2006-10-05 14:46  gb
+
+        * lisp-kernel/x86-exceptions.c: Save the mxcsr, load it with a
+        C-like value (all exceptions masked) before doing a callback.  (Not
+        doing this meant that tcr.foreign_mxcsr was often set to a "lispy"
+        value, where most exceptions were unmasked, and this caused FP
+        exceptions when calling out to foreign code with the "lispy"
+        tcr.foreign_mxcsr in effect.)
+        
+        Mach exception stuff arranges to return via sigreturn.  Didn't fix
+        the spurious SIGTRAPs, but might be the right idea (and might save
+        a context switch or two.)
+        
+        Mach exception stuff initializes rflags to exception rflags when
+        arranging to resume thread at handler.  Leaving them uninitialized
+        was causing spurious SIGTRAPs, since the trace bit(s) may have been
+        set.
+
 2006-10-05 06:09  gb