On 2019/02/05 08:39, Otto Moerbeek wrote:
> On Sat, Feb 02, 2019 at 02:24:20PM +0100, Otto Moerbeek wrote:
>
> > Hi,
> >
> > this fixes exception handling when using eg++ on sparc64. Since stack
> > frames are non-standard on OpenBSD/sparc64 because of stackghost, we
> > need adapted code to unwind the stack.
> >
> > Regress tests in regress/misc/exceptions pass. Also, pdns_server is
> > much happier (though still suffering from a Bus Error unrelated to
> > exceptions).
> >
> > Thanks to kettenis@ pointing me in the right direction. The code is
> > equivalent to the code in the base C++ compiler.
> >
> > OK?
>
> ping?
I can't test at the moment, but that reads OK.
Presumably lang/gcc/8 needs the same?
> >
> > -Otto
> >
> > Index: Makefile
> > ===================================================================
> > RCS file: /cvs/ports/lang/gcc/4.9/Makefile,v
> > retrieving revision 1.64
> > diff -u -p -r1.64 Makefile
> > --- Makefile 17 Dec 2018 14:05:21 -0000 1.64
> > +++ Makefile 2 Feb 2019 13:18:11 -0000
> > @@ -4,7 +4,7 @@ ONLY_FOR_ARCHS = ${GCC49_ARCHS}
> > DPB_PROPERTIES = parallel
> >
> > V = 4.9.4
> > -REVISION = 15
> > +REVISION = 16
> > FULL_VERSION = $V
> > FULL_PKGVERSION = $V
> >
> > Index: patches/patch-libgcc_unwind-dw2_c
> > ===================================================================
> > RCS file: patches/patch-libgcc_unwind-dw2_c
> > diff -N patches/patch-libgcc_unwind-dw2_c
> > --- /dev/null 1 Jan 1970 00:00:00 -0000
> > +++ patches/patch-libgcc_unwind-dw2_c 2 Feb 2019 13:18:11 -0000
> > @@ -0,0 +1,53 @@
> > +$OpenBSD$
> > +
> > +Index: libgcc/unwind-dw2.c
> > +--- libgcc/unwind-dw2.c.orig
> > ++++ libgcc/unwind-dw2.c
> > +@@ -217,6 +217,25 @@ _Unwind_IsExtendedContext (struct _Unwind_Context *con
> > + return (ASSUME_EXTENDED_UNWIND_CONTEXT
> > + || (context->flags & EXTENDED_CONTEXT_BIT));
> > + }
> > ++
> > ++#ifdef __sparc64__
> > ++
> > ++/* Figure out StackGhost cookie. */
> > ++_Unwind_Word uw_get_wcookie(void);
> > ++
> > ++asm(".text\n"
> > ++ "uw_get_wcookie:\n"
> > ++ " add %o7, %g0, %g4\n"
> > ++ " save %sp, -176, %sp\n"
> > ++ " save %sp, -176, %sp\n"
> > ++ " flushw\n"
> > ++ " restore\n"
> > ++ " ldx [%sp + 2047 + 120], %g5\n"
> > ++ " xor %g4, %g5, %i0\n"
> > ++ " ret\n"
> > ++ " restore\n");
> > ++#endif
> > ++
> > +
> > + /* Get the value of register INDEX as saved in CONTEXT. */
> > +
> > +@@ -239,6 +258,13 @@ _Unwind_GetGR (struct _Unwind_Context *context, int in
> > + if (_Unwind_IsExtendedContext (context) && context->by_value[index])
> > + return _Unwind_Get_Unwind_Word (val);
> > +
> > ++#ifdef __sparc64__
> > ++ /* _Unwind_Word and _Unwind_Ptr are the same size on sparc64 */
> > ++ _Unwind_Word reg = * (_Unwind_Word *) val;
> > ++ if (index == 15 || index == 31)
> > ++ reg ^= uw_get_wcookie ();
> > ++ return reg;
> > ++#else
> > + /* This will segfault if the register hasn't been saved. */
> > + if (size == sizeof(_Unwind_Ptr))
> > + return * (_Unwind_Ptr *) (_Unwind_Internal_Ptr) val;
> > +@@ -247,6 +273,7 @@ _Unwind_GetGR (struct _Unwind_Context *context, int in
> > + gcc_assert (size == sizeof(_Unwind_Word));
> > + return * (_Unwind_Word *) (_Unwind_Internal_Ptr) val;
> > + }
> > ++#endif
> > + }
> > +
> > + static inline void *
> >
>
