Kai Tietz wrote: > Hi, > > For trunk-version I have a tentative patch for this issue. On 4.6.x > and older branches this doesn't work, as here we can't differenciate > that easy between ms- and sysv-abi. > > But could somebody give this patch a try? > > Regards, > Kai > > ChangeLog > > * config/i386/i386.c (ix86_frame_pointer_required): Enforce use of > frame-pointer for 32-bit ms-abi, if setjmp is used. > > Index: i386.c > =================================================================== > --- i386.c (revision 180099) > +++ i386.c (working copy) > @@ -8391,6 +8391,10 @@ > if (SUBTARGET_FRAME_POINTER_REQUIRED) > return true; > > + /* For older 32-bit runtimes setjmp requires valid frame-pointer. */ > + if (TARGET_32BIT_MS_ABI && cfun->calls_setjmp) > + return true; > + > /* In ix86_option_override_internal, TARGET_OMIT_LEAF_FRAME_POINTER > turns off the frame pointer by default. Turn it back on now if > we've not got a leaf function. */ >
For a gcc 4.7 snapshot, this does fix the longjmp problem that I encountered. So aside from specifying -fno-omit-frame-pointer for affected files, what can be done for 4.6? Bob
