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/*-
* Copyright (c) 2003 Peter Wemm
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#include <machine/asmacros.h>
#include "assym.s"
.text
/*
* 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
* can do a swapgs before enabling interrupts. This is critical because
* if we took an interrupt before swapgs, the interrupt code would see
* that it originated in supervisor mode and skip the swapgs.
*/
SUPERALIGN_TEXT
IDTVEC(int0x80_syscall_pti)
PTI_UENTRY has_err=0
jmp int0x80_syscall_common
SUPERALIGN_TEXT
IDTVEC(int0x80_syscall)
swapgs
int0x80_syscall_common:
pushq $2 /* sizeof "int 0x80" */
subq $TF_ERR,%rsp /* skip over tf_trapno */
movq %rdi,TF_RDI(%rsp)
movq PCPU(CURPCB),%rdi
andl $~PCB_FULL_IRET,PCB_FLAGS(%rdi)
SAVE_SEGS
movq %rax,TF_RAX(%rsp)
movq %rdx,TF_RDX(%rsp)
movq %rcx,TF_RCX(%rsp)
call handle_ibrs_entry
sti
movq %rsi,TF_RSI(%rsp)
movq %r8,TF_R8(%rsp)
movq %r9,TF_R9(%rsp)
movq %rbx,TF_RBX(%rsp)
movq %rbp,TF_RBP(%rsp)
movq %r10,TF_R10(%rsp)
movq %r11,TF_R11(%rsp)
movq %r12,TF_R12(%rsp)
movq %r13,TF_R13(%rsp)
movq %r14,TF_R14(%rsp)
movq %r15,TF_R15(%rsp)
movl $TF_HASSEGS,TF_FLAGS(%rsp)
cld
FAKE_MCOUNT(TF_RIP(%rsp))
movq %rsp, %rdi
call ia32_syscall
MEXITCOUNT
jmp doreti
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