1/*- 2 * Copyright (c) 2003 Peter Wemm 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27#include <machine/asmacros.h> 28 29#include "assym.inc" 30 31 .text 32/* 33 * Call gate entry for FreeBSD ELF and Linux/NetBSD syscall (int 0x80) 34 * 35 * This is a SDT_SYSIDT entry point (unlike the i386 port) so that we 36 * can do a swapgs before enabling interrupts. This is critical because 37 * if we took an interrupt before swapgs, the interrupt code would see 38 * that it originated in supervisor mode and skip the swapgs. 39 */ 40 SUPERALIGN_TEXT 41IDTVEC(int0x80_syscall_pti) 42 PTI_UENTRY has_err=0 43 jmp int0x80_syscall_common 44 SUPERALIGN_TEXT 45IDTVEC(int0x80_syscall) 46 swapgs 47int0x80_syscall_common: 48 pushq $2 /* sizeof "int 0x80" */ 49 subq $TF_ERR,%rsp /* skip over tf_trapno */ 50 movq %rdi,TF_RDI(%rsp) 51 movq PCPU(CURPCB),%rdi 52 andl $~PCB_FULL_IRET,PCB_FLAGS(%rdi) 53 SAVE_SEGS 54 movq %rax,TF_RAX(%rsp) 55 movq %rdx,TF_RDX(%rsp) 56 movq %rcx,TF_RCX(%rsp) 57 call handle_ibrs_entry 58 sti 59 movq %rsi,TF_RSI(%rsp) 60 movq %r8,TF_R8(%rsp) 61 movq %r9,TF_R9(%rsp) 62 movq %rbx,TF_RBX(%rsp) 63 movq %rbp,TF_RBP(%rsp) 64 movq %r10,TF_R10(%rsp) 65 movq %r11,TF_R11(%rsp) 66 movq %r12,TF_R12(%rsp) 67 movq %r13,TF_R13(%rsp) 68 movq %r14,TF_R14(%rsp) 69 movq %r15,TF_R15(%rsp) 70 movl $TF_HASSEGS,TF_FLAGS(%rsp) 71 pushfq 72 andq $~(PSL_D | PSL_AC),(%rsp) 73 popfq 74 movq %rsp, %rdi 75 call ia32_syscall 76 jmp doreti 77