Changeset View

Standalone View

	Show All 34 Lines
	* Call gate entry for FreeBSD ELF and Linux/NetBSD syscall (int 0x80)			* Call gate entry for FreeBSD ELF and Linux/NetBSD syscall (int 0x80)
	*			*
	* This is a SDT_SYSIDT entry point (unlike the i386 port) so that we			* This is a SDT_SYSIDT entry point (unlike the i386 port) so that we
	* can do a swapgs before enabling interrupts. This is critical because			* can do a swapgs before enabling interrupts. This is critical because
	* if we took an interrupt before swapgs, the interrupt code would see			* if we took an interrupt before swapgs, the interrupt code would see
	* that it originated in supervisor mode and skip the swapgs.			* that it originated in supervisor mode and skip the swapgs.
	*/			*/
	SUPERALIGN_TEXT			SUPERALIGN_TEXT
				IDTVEC(int0x80_syscall_pti)
				PTI_UENTRY has_err=0
				jmp int0x80_syscall_common
				SUPERALIGN_TEXT
	IDTVEC(int0x80_syscall)			IDTVEC(int0x80_syscall)
	swapgs			swapgs
				int0x80_syscall_common:
	pushq $2 /* sizeof "int 0x80" */			pushq $2 /* sizeof "int 0x80" */
	subq $TF_ERR,%rsp /* skip over tf_trapno */			subq $TF_ERR,%rsp /* skip over tf_trapno */
	movq %rdi,TF_RDI(%rsp)			movq %rdi,TF_RDI(%rsp)
	movq PCPU(CURPCB),%rdi			movq PCPU(CURPCB),%rdi
	andl $~PCB_FULL_IRET,PCB_FLAGS(%rdi)			andl $~PCB_FULL_IRET,PCB_FLAGS(%rdi)
	movw %fs,TF_FS(%rsp)			movw %fs,TF_FS(%rsp)
	movw %gs,TF_GS(%rsp)			movw %gs,TF_GS(%rsp)
	movw %es,TF_ES(%rsp)			movw %es,TF_ES(%rsp)
	Show All 23 Lines