osfmk/i386/idt.s

493  *	ecx
514 	movl	%gs:CPU_ACTIVE_THREAD,%ecx
515 	subl	TH_PCB_ISS(%ecx),%ebx
516 	movl	$(WINDOWS_CLEAN),TH_COPYIO_STATE(%ecx)
518 	movl	TH_PCB_IDS(%ecx),%eax	/* get debug state struct */
521 	movl	DS_DR0(%eax), %ecx	/* Load the 32 bit debug registers */
522 	movl	%ecx, %db0
523 	movl	DS_DR1(%eax), %ecx
524 	movl	%ecx, %db1
525 	movl	DS_DR2(%eax), %ecx
526 	movl	%ecx, %db2
527 	movl	DS_DR3(%eax), %ecx
528 	movl	%ecx, %db3
532 	movl	%gs:CPU_TASK_CR3,%ecx
533 	movl	%ecx,%gs:CPU_ACTIVE_CR3
535 	movl    %ecx,%cr3               /* switch to user's address space */
563 	popl	%ecx			/* pop and toss cs */
566 	popl	%ecx			/* user return esp */
599  *	ecx: user stack pointer
603  *       or requiring ecx to be preserved.
612 	pushl	%ecx			/* uesp */
645 	movl    HI_DATA(lo_kernel_cr3),%ecx
647 	cmpl	%eax,%ecx
649 	movl	%ecx,%cr3
650 	movl	%ecx,%gs:CPU_ACTIVE_CR3
657 	movl	%gs:CPU_ACTIVE_THREAD,%ecx
658 	addl	TH_PCB_ISS(%ecx),%edx		/* rebase the high stack to a low address */
660 	cmpl	$0, TH_PCB_IDS(%ecx)	/* Is there a debug register state? */
662 	movl	$0, %ecx		/* If so, reset DR7 (the control) */
663 	movl	%ecx, %dr7
665 	movl	R32_TRAPNO(%esp),%ecx			// Get the interrupt vector
666 	addl	$1,%gs:hwIntCnt(,%ecx,4)	// Bump the count
721 	pushl	%ecx			/* save %ecx */
722 	movl	8(%esp),%ecx		/* top of intr stack -> pcb stack */
723 	xchgl	%ecx,%esp		/* switch to pcb stack */
725 	pushl	%ss:(%ecx)		/* %ecx into uesp slot */
726 	pushl	%ss:4(%ecx)		/* eflags */
727 	movl	%ss:(%ecx),%ecx		/* restore %ecx */
881 	movl	%gs:CPU_ACTIVE_THREAD,%ecx
882 	movl	TH_TASK(%ecx),%ebx
885 	TASK_VTIMER_CHECK(%ebx, %ecx)
893 	xorl	%ecx,%ecx		/* don't check if we're in the PFZ */
909 	testl	%ecx, %ecx		/* see if we need to check for an EIP in the PFZ */
925 	movl	R64_RIP(%ebx), %ecx
929 	CCALL2(commpage_is_in_pfz64, %ecx, %eax)
941 	xorl	%ecx, %ecx		/* don't check if we're in the PFZ */
970 	movl	%esp,%ecx
971 	xorl	%eax,%ecx
972 	and	EXT(kernel_stack_mask),%ecx
973 	testl	%ecx,%ecx		/* are we on the kernel stack? */
998 	movl	%gs:CPU_INT_STACK_TOP,%ecx
999 	cmpl	%esp,%ecx
1001 	leal	-INTSTACK_SIZE(%ecx),%edx
1005 	xchgl	%ecx,%esp		/* switch to interrupt stack */
1012 	pushl	%ecx			/* save pointer to old stack */
1013 	movl	%ecx,%gs:CPU_INT_STATE	/* save intr state */
1017 	movl	%gs:CPU_ACTIVE_THREAD,%ecx
1018 	movl	TH_TASK(%ecx),%ebx
1021 	TASK_VTIMER_CHECK(%ebx, %ecx)
1074 	movl	%esp,%ecx
1075 	xorl	%eax,%ecx
1076 	and	EXT(kernel_stack_mask),%ecx
1077 	testl	%ecx,%ecx			/* are we on the kernel stack? */
1115 	movl	$1, %ecx		/* check if we're in the PFZ */
1149 	movl	%gs:CPU_ACTIVE_THREAD,%ecx	/* get current thread     */
1150 	movl	TH_TASK(%ecx),%ebx		/* point to current task  */
1151 	incl	TH_SYSCALLS_UNIX(%ecx)		/* increment call count   */
1154 	TASK_VTIMER_CHECK(%ebx, %ecx)
1169 	movl	%gs:CPU_ACTIVE_THREAD,%ecx	/* get current thread     */
1170 	movl	TH_TASK(%ecx),%ebx		/* point to current task  */
1171 	incl	TH_SYSCALLS_MACH(%ecx)		/* increment call count   */
1174 	TASK_VTIMER_CHECK(%ebx, %ecx)
1189 	movl	%gs:CPU_ACTIVE_THREAD,%ecx	/* get current thread     */
1190 	movl	TH_TASK(%ecx),%ebx		/* point to current task  */
1193 	TASK_VTIMER_CHECK(%ebx, %ecx)