osfmk/i386/idt64.s

520 	mov	%cr3, %rax
521 	cmp	%rcx, %rax
529 	mov	%gs:CPU_DR7, %rax	/* Is there a debug control register?*/
530 	cmp	$0, %rax
532 	mov	%rax, %dr7		/* Set DR7 */
539 	mov	$(KERNEL_UBER_BASE_HI32), %rax
541 	shrd	$32, %rax, %rsp			/* relocate into uber-space */
556 	mov	$(KERNEL_UBER_BASE_HI32), %rax
558 	shrd	$32, %rax, %rsp			/* relocate into uber-space */
655 	mov	R64_RAX(%rsp), %rax
691  * These are entered via a syscall interrupt. The system call number in %rax
699 	push	%rax			/* save system call number */
708 	push	%rax			/* save system call number */
717 	push	%rax			/* save system call number */
739 	mov	%rax, ISF64_ERR(%rsp)		/* err/rax - syscall code */
781 	push	%rax			/* err/eax - syscall code */
846 	mov	%cr2, %rax
885 	mov	%cr3, %rax
887 	cmp	%rax, %rcx			/* is the task's cr3 loaded? */
893 	cmp	%rax, %rcx
957 	mov	%rax, R64_RAX(%rsp)
968 	mov	%cr2, %rax
969 	mov	%rax, R64_CR2(%rsp)
1138 	movq	%rax, %gs:CPU_UBER_TMP		/* save %rax */
1139 	movq	%gs:CPU_UBER_ISF, %rax		/* PCB stack addr */
1140 	subq	%rsp, %rax
1141 	cmpq	$(PAGE_SIZE), %rax		/* current stack in PCB? */
1142 	movq	%gs:CPU_UBER_TMP, %rax		/* restore %rax */
1149 	movq	%gs:CPU_KERNEL_STACK, %rax	/* note: %rax restored below */
1150 	xchgq	%rax, %rsp
1151 	pushq	ISF64_SS(%rax)
1152 	pushq	ISF64_RSP(%rax)
1153 	pushq	ISF64_RFLAGS(%rax)
1154 	pushq	ISF64_CS(%rax)
1155 	pushq	ISF64_RIP(%rax)
1156 	pushq	ISF64_ERR(%rax)
1157 	pushq	ISF64_TRAPFN(%rax)
1158 	pushq	ISF64_TRAPNO(%rax)
1159 	movq	%gs:CPU_UBER_TMP, %rax		/* restore %rax */
1184 	mov	%rax, ISF64_RIP(%rsp)	/* save rax (we don`t need saved rip) */
1185 	mov	ISF64_TRAPNO(%rsp), %rax
1186 	mov	%rax, ISF64_SS(%rsp)	/* put in user trap number */
1187 	mov	ISF64_ERR(%rsp), %rax
1188 	mov	%rax, 8+ISF64_SS(%rsp)	/* put in user errcode */
1189 	mov	ISF64_RIP(%rsp), %rax	/* restore rax */
1196 	mov	%rax, ISF64_RIP(%rsp)	/* save rax (we don`t need saved rip) */
1197 	mov	ISF64_TRAPNO(%rsp), %rax
1198 	mov	%rax, ISF64_SS(%rsp)	/* put in user trap number */
1199 	mov	ISF64_ERR(%rsp), %rax
1200 	mov	%rax, 8+ISF64_SS(%rsp)	/* put in user errcode */
1201 	mov	ISF64_RIP(%rsp), %rax	/* restore rax */
1212 	mov	ISF64_TRAPNO(%rsp), %rax
1215 	mov	%rax,ISC32_TRAPNO(%rsp)