| vm86bios.s (69431) | vm86bios.s (69971) |
|---|---|
| 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 69431 2000-12-01 02:09:45Z jake $ | 26 * $FreeBSD: head/sys/i386/i386/vm86bios.s 69971 2000-12-13 09:23:53Z jake $ |
| 27 */ 28 29#include <machine/asmacros.h> /* miscellaneous asm macros */ 30#include <machine/trap.h> 31 32#include "assym.s" 33 34#define SCR_NEWPTD PCB_ESI /* readability macros */ --- 23 unchanged lines hidden (view full) --- 58 movl %eax,SCR_ARGFRAME(%edx) /* save argument pointer */ 59 pushl %ebx 60 pushl %ebp 61 pushl %esi 62 pushl %edi 63 pushl %gs 64 65#if NNPX > 0 | 27 */ 28 29#include <machine/asmacros.h> /* miscellaneous asm macros */ 30#include <machine/trap.h> 31 32#include "assym.s" 33 34#define SCR_NEWPTD PCB_ESI /* readability macros */ --- 23 unchanged lines hidden (view full) --- 58 movl %eax,SCR_ARGFRAME(%edx) /* save argument pointer */ 59 pushl %ebx 60 pushl %ebp 61 pushl %esi 62 pushl %edi 63 pushl %gs 64 65#if NNPX > 0 |
| 66 movl _curproc,%ecx 67 cmpl %ecx,_npxproc /* do we need to save fp? */ | 66 movl PCPU(CURPROC),%ecx 67 cmpl %ecx,PCPU(NPXPROC) /* do we need to save fp? */ |
| 68 jne 1f 69 testl %ecx,%ecx 70 je 1f /* no curproc/npxproc */ 71 pushl %edx 72 movl P_ADDR(%ecx),%ecx 73 addl $PCB_SAVEFPU,%ecx 74 pushl %ecx 75 call _npxsave --- 5 unchanged lines hidden (view full) --- 81 movl SCR_VMFRAME(%edx),%ebx /* target frame location */ 82 movl %ebx,%edi /* destination */ 83 movl SCR_ARGFRAME(%edx),%esi /* source (set on entry) */ 84 movl $VM86_FRAMESIZE/4,%ecx /* sizeof(struct vm86frame)/4 */ 85 cld 86 rep 87 movsl /* copy frame to new stack */ 88 | 68 jne 1f 69 testl %ecx,%ecx 70 je 1f /* no curproc/npxproc */ 71 pushl %edx 72 movl P_ADDR(%ecx),%ecx 73 addl $PCB_SAVEFPU,%ecx 74 pushl %ecx 75 call _npxsave --- 5 unchanged lines hidden (view full) --- 81 movl SCR_VMFRAME(%edx),%ebx /* target frame location */ 82 movl %ebx,%edi /* destination */ 83 movl SCR_ARGFRAME(%edx),%esi /* source (set on entry) */ 84 movl $VM86_FRAMESIZE/4,%ecx /* sizeof(struct vm86frame)/4 */ 85 cld 86 rep 87 movsl /* copy frame to new stack */ 88 |
| 89 movl _curpcb,%eax | 89 movl PCPU(CURPCB),%eax |
| 90 pushl %eax /* save curpcb */ | 90 pushl %eax /* save curpcb */ |
| 91 movl %edx,_curpcb /* set curpcb to vm86pcb */ | 91 movl %edx,PCPU(CURPCB) /* set curpcb to vm86pcb */ |
| 92 | 92 |
| 93 movl _tss_gdt,%ebx /* entry in GDT */ | 93 movl PCPU(TSS_GDT),%ebx /* entry in GDT */ |
| 94 movl 0(%ebx),%eax 95 movl %eax,SCR_TSS0(%edx) /* save first word */ 96 movl 4(%ebx),%eax 97 andl $~0x200, %eax /* flip 386BSY -> 386TSS */ 98 movl %eax,SCR_TSS1(%edx) /* save second word */ 99 100 movl PCB_EXT(%edx),%edi /* vm86 tssd entry */ 101 movl 0(%edi),%eax --- 22 unchanged lines hidden (view full) --- 124 125 call _vm86_prepcall /* finish setup */ 126 127 movl $1,_in_vm86call /* set flag for trap() */ 128 129 /* 130 * Return via _doreti 131 */ | 94 movl 0(%ebx),%eax 95 movl %eax,SCR_TSS0(%edx) /* save first word */ 96 movl 4(%ebx),%eax 97 andl $~0x200, %eax /* flip 386BSY -> 386TSS */ 98 movl %eax,SCR_TSS1(%edx) /* save second word */ 99 100 movl PCB_EXT(%edx),%edi /* vm86 tssd entry */ 101 movl 0(%edi),%eax --- 22 unchanged lines hidden (view full) --- 124 125 call _vm86_prepcall /* finish setup */ 126 127 movl $1,_in_vm86call /* set flag for trap() */ 128 129 /* 130 * Return via _doreti 131 */ |
| 132 incb _intr_nesting_level | 132 incb PCPU(INTR_NESTING_LEVEL) |
| 133 MEXITCOUNT 134 jmp _doreti 135 136 137/* 138 * vm86_biosret(struct trapframe_vm86 *vm86) 139 */ 140ENTRY(vm86_biosret) --- 10 unchanged lines hidden (view full) --- 151 popl %ebx /* saved va of Idle PTD */ 152 popl %eax 153 movl %eax,0(%ebx) /* restore old pte */ 154 popl %eax 155 movl %eax,%cr3 /* install old page table */ 156 157 movl $0,_in_vm86call /* reset trapflag */ 158 | 133 MEXITCOUNT 134 jmp _doreti 135 136 137/* 138 * vm86_biosret(struct trapframe_vm86 *vm86) 139 */ 140ENTRY(vm86_biosret) --- 10 unchanged lines hidden (view full) --- 151 popl %ebx /* saved va of Idle PTD */ 152 popl %eax 153 movl %eax,0(%ebx) /* restore old pte */ 154 popl %eax 155 movl %eax,%cr3 /* install old page table */ 156 157 movl $0,_in_vm86call /* reset trapflag */ 158 |
| 159 movl _tss_gdt,%ebx /* entry in GDT */ | 159 movl PCPU(TSS_GDT),%ebx /* entry in GDT */ |
| 160 movl SCR_TSS0(%edx),%eax 161 movl %eax,0(%ebx) /* restore first word */ 162 movl SCR_TSS1(%edx),%eax 163 movl %eax,4(%ebx) /* restore second word */ 164 movl $GPROC0_SEL*8,%esi /* GSEL(entry, SEL_KPL) */ 165 ltr %si 166 | 160 movl SCR_TSS0(%edx),%eax 161 movl %eax,0(%ebx) /* restore first word */ 162 movl SCR_TSS1(%edx),%eax 163 movl %eax,4(%ebx) /* restore second word */ 164 movl $GPROC0_SEL*8,%esi /* GSEL(entry, SEL_KPL) */ 165 ltr %si 166 |
| 167 popl _curpcb /* restore curpcb/curproc */ | 167 popl PCPU(CURPCB) /* restore curpcb/curproc */ |
| 168 movl SCR_ARGFRAME(%edx),%edx /* original stack frame */ 169 movl TF_TRAPNO(%edx),%eax /* return (trapno) */ 170 171 popl %gs 172 popl %edi 173 popl %esi 174 popl %ebp 175 popl %ebx 176 ret /* back to our normal program */ | 168 movl SCR_ARGFRAME(%edx),%edx /* original stack frame */ 169 movl TF_TRAPNO(%edx),%eax /* return (trapno) */ 170 171 popl %gs 172 popl %edi 173 popl %esi 174 popl %ebp 175 popl %ebx 176 ret /* back to our normal program */ |