osfmk/i386/idt64.s

443  *	ebx
584 	movl	R32_EBX(%rsp), %ebx
757  *		on which is pushed stub ret addr and saved ebx
838 	mov	%ebx, R32_EBX(%rsp)
868 	mov	ISC32_TRAPNO(%rsp), %ebx	/* %ebx := trapno for later */
869 	mov	%ebx, R32_TRAPNO(%rsp)
876  *	%ebx	trapno
914 	 * 	%ebx		trapno
927 	incl	%gs:hwIntCnt(,%ebx,4)	/* Bump the trap/intr count */
983 	mov	R64_TRAPNO(%rsp), %ebx
1274 	movl	TH_TASK(%ecx),%ebx
1277 	TASK_VTIMER_CHECK(%ebx, %ecx)
1279 	movl	%gs:CPU_KERNEL_STACK,%ebx
1280 	xchgl	%ebx,%esp		/* switch to kernel stack */
1282 	CCALL1(user_trap, %ebx)		/* call user trap routine */
1298 	movl	%gs:CPU_KERNEL_STACK, %ebx
1299 	xchgl	%ebx, %esp		/* switch to kernel stack */
1303 	cmpl	$(SS_64), SS_FLAVOR(%ebx)	/* are we a 64-bit task? */
1306 	movl	R32_EIP(%ebx), %eax
1307 	pushl	%ebx			/* save PCB stack */
1310 	popl	%ebx			/* retrieve pointer to PCB stack */
1313 	movl	%eax, R32_EBX(%ebx)	/* let the PFZ know we've pended an AST */
1314 	xchgl	%ebx, %esp		/* switch back to PCB stack */
1317 	movl	R64_RIP(%ebx), %ecx
1318 	movl	R64_RIP+4(%ebx), %eax
1319 	pushl	%ebx			/* save PCB stack */
1322 	popl	%ebx			/* retrieve pointer to PCB stack */
1325 	movl	%eax, R64_RBX(%ebx)	/* let the PFZ know we've pended an AST */
1326 	xchgl	%ebx, %esp		/* switch back to PCB stack */
1330 	pushl	%ebx			/* save PCB stack */
1413 	movl	TH_TASK(%ecx),%ebx
1416 	TASK_VTIMER_CHECK(%ebx, %ecx)
1537 	movl	TH_TASK(%ecx),%ebx		/* point to current task  */
1541 	TASK_VTIMER_CHECK(%ebx, %ecx)
1557 	movl	TH_TASK(%ecx),%ebx		/* point to current task  */
1561 	TASK_VTIMER_CHECK(%ebx, %ecx)
1577 	movl	TH_TASK(%ecx),%ebx		/* point to current task  */
1580 	TASK_VTIMER_CHECK(%ebx, %ecx)
1616 	movl	TH_TASK(%ecx),%ebx		/* point to current task  */
1619 	TASK_VTIMER_CHECK(%ebx, %ecx)