| vm86bios.s (87702) | vm86bios.s (106542) |
|---|---|
| 1/*- 2 * Copyright (c) 1998 Jonathan Lemon 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) 1998 Jonathan Lemon 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/i386/i386/vm86bios.s 87702 2001-12-11 23:33:44Z jhb $ | 26 * $FreeBSD: head/sys/i386/i386/vm86bios.s 106542 2002-11-07 01:34:23Z davidxu $ |
| 27 */ 28 29#include "opt_npx.h" 30 31#include <machine/asmacros.h> /* miscellaneous asm macros */ 32#include <machine/trap.h> 33 34#include "assym.s" --- 4 unchanged lines hidden (view full) --- 39#define SCR_PGTABLE PCB_EBX 40#define SCR_ARGFRAME PCB_EIP 41#define SCR_TSS0 PCB_SPARE 42#define SCR_TSS1 (PCB_SPARE+4) 43 44 .data 45 ALIGN_DATA 46 | 27 */ 28 29#include "opt_npx.h" 30 31#include <machine/asmacros.h> /* miscellaneous asm macros */ 32#include <machine/trap.h> 33 34#include "assym.s" --- 4 unchanged lines hidden (view full) --- 39#define SCR_PGTABLE PCB_EBX 40#define SCR_ARGFRAME PCB_EIP 41#define SCR_TSS0 PCB_SPARE 42#define SCR_TSS1 (PCB_SPARE+4) 43 44 .data 45 ALIGN_DATA 46 |
| 47 .globl in_vm86call, vm86pcb | 47 .globl vm86pcb |
| 48 | 48 |
| 49in_vm86call: .long 0 | |
| 50vm86pcb: .long 0 51 52 .text 53 54/* 55 * vm86_bioscall(struct trapframe_vm86 *vm86) 56 */ 57ENTRY(vm86_bioscall) --- 66 unchanged lines hidden (view full) --- 124 movl SCR_NEWPTD(%edx),%eax /* mapping for vm86 page table */ 125 movl %eax,0(%ebx) /* ... install as PTD entry 0 */ 126 127 movl %ecx,%cr3 /* new page tables */ 128 movl SCR_VMFRAME(%edx),%esp /* switch to new stack */ 129 130 call vm86_prepcall /* finish setup */ 131 | 49vm86pcb: .long 0 50 51 .text 52 53/* 54 * vm86_bioscall(struct trapframe_vm86 *vm86) 55 */ 56ENTRY(vm86_bioscall) --- 66 unchanged lines hidden (view full) --- 123 movl SCR_NEWPTD(%edx),%eax /* mapping for vm86 page table */ 124 movl %eax,0(%ebx) /* ... install as PTD entry 0 */ 125 126 movl %ecx,%cr3 /* new page tables */ 127 movl SCR_VMFRAME(%edx),%esp /* switch to new stack */ 128 129 call vm86_prepcall /* finish setup */ 130 |
| 132 movl $1,in_vm86call /* set flag for trap() */ 133 | |
| 134 /* 135 * Return via doreti 136 */ 137 MEXITCOUNT 138 jmp doreti 139 140 141/* --- 11 unchanged lines hidden (view full) --- 153 154 movl SCR_STACK(%edx),%esp /* back to old stack */ 155 popl %ebx /* saved va of Idle PTD */ 156 popl %eax 157 movl %eax,0(%ebx) /* restore old pte */ 158 popl %eax 159 movl %eax,%cr3 /* install old page table */ 160 | 131 /* 132 * Return via doreti 133 */ 134 MEXITCOUNT 135 jmp doreti 136 137 138/* --- 11 unchanged lines hidden (view full) --- 150 151 movl SCR_STACK(%edx),%esp /* back to old stack */ 152 popl %ebx /* saved va of Idle PTD */ 153 popl %eax 154 movl %eax,0(%ebx) /* restore old pte */ 155 popl %eax 156 movl %eax,%cr3 /* install old page table */ 157 |
| 161 movl $0,in_vm86call /* reset trapflag */ 162 | |
| 163 movl PCPU(TSS_GDT),%ebx /* entry in GDT */ 164 movl SCR_TSS0(%edx),%eax 165 movl %eax,0(%ebx) /* restore first word */ 166 movl SCR_TSS1(%edx),%eax 167 movl %eax,4(%ebx) /* restore second word */ 168 movl $GPROC0_SEL*8,%esi /* GSEL(entry, SEL_KPL) */ 169 ltr %si 170 171 popl PCPU(CURPCB) /* restore curpcb/curproc */ 172 movl SCR_ARGFRAME(%edx),%edx /* original stack frame */ 173 movl TF_TRAPNO(%edx),%eax /* return (trapno) */ 174 175 popl %gs 176 popl %edi 177 popl %esi 178 popl %ebp 179 popl %ebx 180 ret /* back to our normal program */ | 158 movl PCPU(TSS_GDT),%ebx /* entry in GDT */ 159 movl SCR_TSS0(%edx),%eax 160 movl %eax,0(%ebx) /* restore first word */ 161 movl SCR_TSS1(%edx),%eax 162 movl %eax,4(%ebx) /* restore second word */ 163 movl $GPROC0_SEL*8,%esi /* GSEL(entry, SEL_KPL) */ 164 ltr %si 165 166 popl PCPU(CURPCB) /* restore curpcb/curproc */ 167 movl SCR_ARGFRAME(%edx),%edx /* original stack frame */ 168 movl TF_TRAPNO(%edx),%eax /* return (trapno) */ 169 170 popl %gs 171 popl %edi 172 popl %esi 173 popl %ebp 174 popl %ebx 175 ret /* back to our normal program */ |