osfmk/i386/idt.s

121 	movl	$(LO_ALLTRAPS),%ebx	;\
134 	movl	$(LO_ALLTRAPS),%ebx	;\
172 	movl	$(LO_ALLTRAPS),%ebx		;\
186 	movl	$(LO_ALLINTRS),%ebx		;\
491  *	ebx
513 	movl	%esp,%ebx
515 	subl	TH_PCB_ISS(%ecx),%ebx
531 	addl	%gs:CPU_HI_ISS,%ebx	/* rebase PCB save area to high addr */
534 	movl	%ebx,%esp		/* switch to hi based PCB stack */
575 	movl	$(LO_UNIX_SCALL),%ebx
583 	movl	$(LO_MACH_SCALL),%ebx
591 	movl	$(LO_MDEP_SCALL),%ebx
600  *		on which is pushed stub ret addr and saved ebx
627 	movl	$(LO_SYSENTER),%ebx
667 	jmp		*%ebx
679 	movl	$(LO_ALLTRAPS),%ebx
734 	movl	$(LO_ALLTRAPS),%ebx
775 	movl	$(LO_ALLTRAPS),%ebx
804 	movl	$(LO_ALLTRAPS),%ebx
846 	movl	$(LO_ALLTRAPS),%ebx
882 	movl	TH_TASK(%ecx),%ebx
885 	TASK_VTIMER_CHECK(%ebx, %ecx)
887 	movl	%gs:CPU_KERNEL_STACK,%ebx
888 	xchgl	%ebx,%esp		/* switch to kernel stack */
890 	CCALL1(user_trap, %ebx)		/* call user trap routine */
906 	movl	%gs:CPU_KERNEL_STACK, %ebx
907 	xchgl	%ebx, %esp		/* switch to kernel stack */
911 	cmpl	$(SS_64), SS_FLAVOR(%ebx)	/* are we a 64-bit task? */
914 	movl	R32_EIP(%ebx), %eax
915 	pushl	%ebx			/* save PCB stack */
918 	popl	%ebx			/* retrieve pointer to PCB stack */
921 	movl	%eax, R32_EBX(%ebx)	/* let the PFZ know we've pended an AST */
922 	xchgl	%ebx, %esp		/* switch back to PCB stack */
925 	movl	R64_RIP(%ebx), %ecx
926 	movl	R64_RIP+4(%ebx), %eax
927 	pushl	%ebx			/* save PCB stack */
930 	popl	%ebx			/* retrieve pointer to PCB stack */
933 	movl	%eax, R64_RBX(%ebx)	/* let the PFZ know we've pended an AST */
934 	xchgl	%ebx, %esp		/* switch back to PCB stack */
1018 	movl	TH_TASK(%ecx),%ebx
1021 	TASK_VTIMER_CHECK(%ebx, %ecx)
1150 	movl	TH_TASK(%ecx),%ebx		/* point to current task  */
1154 	TASK_VTIMER_CHECK(%ebx, %ecx)
1170 	movl	TH_TASK(%ecx),%ebx		/* point to current task  */
1174 	TASK_VTIMER_CHECK(%ebx, %ecx)
1190 	movl	TH_TASK(%ecx),%ebx		/* point to current task  */
1193 	TASK_VTIMER_CHECK(%ebx, %ecx)