/*-
 * 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.
 */

#include <machine/asmacros.h>

#include "assym.inc"

        .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)
        pushfq
        andq    $~(PSL_D | PSL_AC),(%rsp)
        popfq
        movq    %rsp, %rdi
        call    ia32_syscall
        jmp     doreti