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Rev 1883 Rev 1915
Line 744... Line 744...
744 
	 * the kernel stack of THREAD locked in DTLB.
 744 
	 * the kernel stack of THREAD locked in DTLB.
745 
	 */
 745 
	 */
746 
	stx %g1, [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_TSTATE]
 746 
	stx %g1, [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_TSTATE]
747 
	stx %g2, [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_TPC]
 747 
	stx %g2, [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_TPC]
748 
	stx %g3, [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_TNPC]
 748 
	stx %g3, [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_TNPC]
- 
 
 749 
 
- 
 
 750 
	/*
- 
 
 751 
	 * Save the Y register.
- 
 
 752 
	 * This register is deprecated according to SPARC V9 specification
- 
 
 753 
	 * and is only present for backward compatibility with previous
- 
 
 754 
	 * versions of the SPARC architecture.
- 
 
 755 
	 * Surprisingly, gcc makes use of this register without a notice.
- 
 
 756 
	 */
- 
 
 757 
	rd %y, %g4
- 
 
 758 
	stx %g4, [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_Y]
749
759
750 
	wrpr %g0, 0, %tl
 760 
	wrpr %g0, 0, %tl
751 
	wrpr %g0, PSTATE_PRIV_BIT | PSTATE_PEF_BIT, %pstate
 761 
	wrpr %g0, PSTATE_PRIV_BIT | PSTATE_PEF_BIT, %pstate
752 
	SAVE_GLOBALS
 762 
	SAVE_GLOBALS
753
763
Line 775... Line 785...
775 
	ldx [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_TSTATE], %g1
 785 
	ldx [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_TSTATE], %g1
776 
	ldx [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_TPC], %g2
 786 
	ldx [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_TPC], %g2
777 
	ldx [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_TNPC], %g3
 787 
	ldx [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_TNPC], %g3
778 
 
 788 
 
779 
	/*
 789 
	/*
- 
 
 790 
	 * Restore Y.
- 
 
 791 
	 */
- 
 
 792 
	ldx [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_Y], %g4
- 
 
 793 
	wr %g4, %y
- 
 
 794 
 
- 
 
 795 
	/*
780 
	 * Copy PSTATE.PEF to the in-register copy of TSTATE.
 796 
	 * Copy PSTATE.PEF to the in-register copy of TSTATE.
781 
	 */
 797 
	 */
782 
	and %l1, PSTATE_PEF_BIT, %l1
 798 
	and %l1, PSTATE_PEF_BIT, %l1
783 
	sllx %l1, TSTATE_PSTATE_SHIFT, %l1
 799 
	sllx %l1, TSTATE_PSTATE_SHIFT, %l1
784 
	sethi %hi(TSTATE_PEF_BIT), %g4
 800 
	sethi %hi(TSTATE_PEF_BIT), %g4