m68k setjmp()

[Jes Sorensen <jes at trained-monkey dot org>]

Hi

I am having a problem with setjmp() on the m68k when compiling binaries
with -fomit-frame-pointere. I realized it's due to the fact that the
current implementation relying on being able to mangle the stack pointer
with the callee handling that:

Is that a reasonable requirement to say that setjmp() just doesn't work
when compiled with -fomit-frame-pointer?

If not, it seems that the way to solve the problem is to change the
implementation of setjmp() and _setjmp() to do the work rather than
relying on them calling __sigsetjmp().

Comments?

Thanks,
Jes

#ifdef MOTOROLA_SYNTAX
#define d0 %d0
#define d1 %d1
#define PUSH(reg)	move.l reg, -(%sp)
#define POP(reg)	move.l (%sp)+, reg
#define PUSH0		clr.l -(%sp)
#else
#define PUSH(reg)	movel reg, sp@-
#define POP(reg)	movel sp@+, reg
#define PUSH0		clrl sp@-
#endif

ENTRY (_setjmp)
	POP (d0)		/* Pop return PC.  */
	POP (d1)		/* Pop jmp_buf argument.  */
	PUSH0			/* Push second argument of zero.  */
	PUSH (d1)		/* Push back first argument.  */
	PUSH (d0)		/* Push back return PC.  */
#ifdef PIC
	bra.l C_SYMBOL_NAME (__sigsetjmp@PLTPC)
#else
	jmp C_SYMBOL_NAME (__sigsetjmp)
#endif
END (_setjmp)