| ia32_exception.S (190620) | ia32_exception.S (195486) |
|---|---|
| 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 unchanged lines hidden (view full) --- 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 * | 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 unchanged lines hidden (view full) --- 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 * $FreeBSD: head/sys/amd64/ia32/ia32_exception.S 190620 2009-04-01 13:09:26Z kib $ | 26 * $FreeBSD: head/sys/amd64/ia32/ia32_exception.S 195486 2009-07-09 09:34:11Z kib $ |
| 27 */ 28 29#include <machine/asmacros.h> 30 31#include "assym.s" 32 33 .text 34/* 35 * Call gate entry for FreeBSD ELF and Linux/NetBSD syscall (int 0x80) 36 * 37 * This is a SDT_SYSIDT entry point (unlike the i386 port) so that we 38 * can do a swapgs before enabling interrupts. This is critical because 39 * if we took an interrupt before swapgs, the interrupt code would see 40 * that it originated in supervisor mode and skip the swapgs. 41 */ 42 SUPERALIGN_TEXT 43IDTVEC(int0x80_syscall) 44 swapgs | 27 */ 28 29#include <machine/asmacros.h> 30 31#include "assym.s" 32 33 .text 34/* 35 * Call gate entry for FreeBSD ELF and Linux/NetBSD syscall (int 0x80) 36 * 37 * This is a SDT_SYSIDT entry point (unlike the i386 port) so that we 38 * can do a swapgs before enabling interrupts. This is critical because 39 * if we took an interrupt before swapgs, the interrupt code would see 40 * that it originated in supervisor mode and skip the swapgs. 41 */ 42 SUPERALIGN_TEXT 43IDTVEC(int0x80_syscall) 44 swapgs |
| 45 sti | |
| 46 pushq $2 /* sizeof "int 0x80" */ 47 subq $TF_ERR,%rsp /* skip over tf_trapno */ 48 movq %rdi,TF_RDI(%rsp) | 45 pushq $2 /* sizeof "int 0x80" */ 46 subq $TF_ERR,%rsp /* skip over tf_trapno */ 47 movq %rdi,TF_RDI(%rsp) |
| 48 movq PCPU(CURPCB),%rdi 49 movb $0,PCB_FULL_IRET(%rdi) 50 movw %fs,TF_FS(%rsp) 51 movw %gs,TF_GS(%rsp) 52 movw %es,TF_ES(%rsp) 53 movw %ds,TF_DS(%rsp) 54 sti |
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| 49 movq %rsi,TF_RSI(%rsp) 50 movq %rdx,TF_RDX(%rsp) 51 movq %rcx,TF_RCX(%rsp) 52 movq %r8,TF_R8(%rsp) 53 movq %r9,TF_R9(%rsp) 54 movq %rax,TF_RAX(%rsp) 55 movq %rbx,TF_RBX(%rsp) 56 movq %rbp,TF_RBP(%rsp) 57 movq %r10,TF_R10(%rsp) 58 movq %r11,TF_R11(%rsp) 59 movq %r12,TF_R12(%rsp) 60 movq %r13,TF_R13(%rsp) 61 movq %r14,TF_R14(%rsp) 62 movq %r15,TF_R15(%rsp) | 55 movq %rsi,TF_RSI(%rsp) 56 movq %rdx,TF_RDX(%rsp) 57 movq %rcx,TF_RCX(%rsp) 58 movq %r8,TF_R8(%rsp) 59 movq %r9,TF_R9(%rsp) 60 movq %rax,TF_RAX(%rsp) 61 movq %rbx,TF_RBX(%rsp) 62 movq %rbp,TF_RBP(%rsp) 63 movq %r10,TF_R10(%rsp) 64 movq %r11,TF_R11(%rsp) 65 movq %r12,TF_R12(%rsp) 66 movq %r13,TF_R13(%rsp) 67 movq %r14,TF_R14(%rsp) 68 movq %r15,TF_R15(%rsp) |
| 63 movw %fs,TF_FS(%rsp) 64 movw %gs,TF_GS(%rsp) 65 movw %es,TF_ES(%rsp) 66 movw %ds,TF_DS(%rsp) | |
| 67 movl $TF_HASSEGS,TF_FLAGS(%rsp) 68 FAKE_MCOUNT(TF_RIP(%rsp)) 69 movq %rsp, %rdi 70 call ia32_syscall 71 MEXITCOUNT 72 jmp doreti | 69 movl $TF_HASSEGS,TF_FLAGS(%rsp) 70 FAKE_MCOUNT(TF_RIP(%rsp)) 71 movq %rsp, %rdi 72 call ia32_syscall 73 MEXITCOUNT 74 jmp doreti |