ia32_exception.S revision 129630
153646Sguido/*- 253646Sguido * Copyright (c) 2003 Peter Wemm 3156813Sru * All rights reserved. 4156813Sru * 577854Sjlemon * Redistribution and use in source and binary forms, with or without 670711Sobrien * modification, are permitted provided that the following conditions 753646Sguido * are met: 853646Sguido * 1. Redistributions of source code must retain the above copyright 9145523Sdarrenr * notice, this list of conditions and the following disclaimer. 10255332Scy * 2. Redistributions in binary form must reproduce the above copyright 11255332Scy * notice, this list of conditions and the following disclaimer in the 12146934Sru * documentation and/or other materials provided with the distribution. 1370711Sobrien * 14151350Syar * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15146934Sru * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16146934Sru * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17146934Sru * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18156813Sru * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19146934Sru * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20146934Sru * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21130253Sdarrenr * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22151350Syar * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2377854Sjlemon * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24145523Sdarrenr * SUCH DAMAGE. 2553646Sguido * 2665423Sgshapiro * $FreeBSD: head/sys/amd64/ia32/ia32_exception.S 129630 2004-05-23 19:06:15Z bde $ 2753646Sguido */ 2853646Sguido 2960966Speter#include <machine/asmacros.h> 30228994Sdim 31228994Sdim#include "assym.s" 32228994Sdim 33228994Sdim#define IDTVEC(name) ALIGN_TEXT; .globl __CONCAT(X,name); \ 34228994Sdim .type __CONCAT(X,name),@function; __CONCAT(X,name): 35 36 .text 37/* 38 * Call gate entry for FreeBSD ELF and Linux/NetBSD syscall (int 0x80) 39 * 40 * This is a SDT_SYSIDT entry point (unlike the i386 port) so that we 41 * can do a swapgs before enabling interrupts. This is critical because 42 * if we took an interrupt before swapgs, the interrupt code would see 43 * that it originated in supervisor mode and skip the swapgs. 44 */ 45 SUPERALIGN_TEXT 46IDTVEC(int0x80_syscall) 47 swapgs 48 sti 49 pushq $2 /* sizeof "int 0x80" */ 50 subq $TF_ERR,%rsp /* skip over tf_trapno */ 51 movq %rdi,TF_RDI(%rsp) 52 movq %rsi,TF_RSI(%rsp) 53 movq %rdx,TF_RDX(%rsp) 54 movq %rcx,TF_RCX(%rsp) 55 movq %r8,TF_R8(%rsp) 56 movq %r9,TF_R9(%rsp) 57 movq %rax,TF_RAX(%rsp) 58 movq %rbx,TF_RBX(%rsp) 59 movq %rbp,TF_RBP(%rsp) 60 movq %r10,TF_R10(%rsp) 61 movq %r11,TF_R11(%rsp) 62 movq %r12,TF_R12(%rsp) 63 movq %r13,TF_R13(%rsp) 64 movq %r14,TF_R14(%rsp) 65 movq %r15,TF_R15(%rsp) 66 FAKE_MCOUNT(TF_RIP(%rsp)) 67 call ia32_syscall 68 MEXITCOUNT 69 jmp doreti 70