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source: vbox/trunk/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-mode-EnteredMode.asm@ 62410

Last change on this file since 62410 was 60676, checked in by vboxsync, 9 years ago

bs3kit: updates
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1; $Id: bs3-mode-EnteredMode.asm 60676 2016-04-24 11:04:57Z vboxsync $
2;; @file
3; BS3Kit - Bs3EnteredMode
4;
5
6;
7; Copyright (C) 2007-2016 Oracle Corporation
8;
9; This file is part of VirtualBox Open Source Edition (OSE), as
10; available from http://www.virtualbox.org. This file is free software;
11; you can redistribute it and/or modify it under the terms of the GNU
12; General Public License (GPL) as published by the Free Software
13; Foundation, in version 2 as it comes in the "COPYING" file of the
14; VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15; hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16;
17; The contents of this file may alternatively be used under the terms
18; of the Common Development and Distribution License Version 1.0
19; (CDDL) only, as it comes in the "COPYING.CDDL" file of the
20; VirtualBox OSE distribution, in which case the provisions of the
21; CDDL are applicable instead of those of the GPL.
22;
23; You may elect to license modified versions of this file under the
24; terms and conditions of either the GPL or the CDDL or both.
25;
26
27%include "bs3kit-template-header.mac"
28
29%if TMPL_BITS == 16
30BS3_EXTERN_DATA16 g_uBs3CpuDetected
31%endif
32BS3_EXTERN_DATA16 g_bBs3CurrentMode
33TMPL_BEGIN_TEXT
34
35;;
36; @cproto BS3_DECL(void) Bs3EnteredMode(void);
37;
38; @uses Nothing.
39;
40; @remarks ASSUMES we're in ring-0 when not in some kind of real mode.
41;
42BS3_PROC_BEGIN_MODE Bs3EnteredMode, BS3_PBC_NEAR ; won't need this outside the switchers, so always near.
43 push xBP
44 mov xBP, xSP
45 push xAX
46%if BS3_MODE_IS_64BIT_CODE(TMPL_MODE)
47 push rcx
48 push rdx
49 push r8
50 push r9
51%endif
52
53 ;
54 ; Load stack selector (not always necessary) and sometimes CS too.
55 ;
56%if BS3_MODE_IS_RM_SYS(TMPL_MODE)
57 xor ax, ax
58%elif BS3_MODE_IS_V86(TMPL_MODE)
59 extern v86_versions_of_Bs3EnteredMode_should_not_be_dragged_into_the_link
60 call v86_versions_of_Bs3EnteredMode_should_not_be_dragged_into_the_link
61%elif BS3_MODE_IS_16BIT_CODE(TMPL_MODE)
62 jmp BS3_SEL_R0_CS16:.reloaded_cs
63.reloaded_cs:
64 mov ax, BS3_SEL_R0_SS16
65%elif BS3_MODE_IS_32BIT_CODE(TMPL_MODE)
66 mov ax, BS3_SEL_R0_SS32
67%elif BS3_MODE_IS_64BIT_CODE(TMPL_MODE)
68 mov ax, BS3_SEL_R0_DS64
69%else
70 %error "TMPL_MODE"
71%endif
72 mov ss, ax
73
74 ;
75 ; Load selector appropriate for accessing BS3SYSTEM16 data.
76 ;
77%if BS3_MODE_IS_16BIT_CODE(TMPL_MODE)
78 mov ax, BS3_SEL_SYSTEM16
79%else
80 mov ax, RT_CONCAT(BS3_SEL_R0_DS,TMPL_BITS)
81%endif
82 mov ds, ax
83
84 ;
85 ; Load the appropritate IDT or IVT.
86 ; Always 64-bit in long mode, otherwise according to TMPL_BITS.
87 ;
88%if BS3_MODE_IS_RM_SYS(TMPL_MODE)
89 BS3_EXTERN_SYSTEM16 Bs3Lidt_Ivt
90 TMPL_BEGIN_TEXT
91 lidt [Bs3Lidt_Ivt]
92
93%elif BS3_MODE_IS_16BIT_SYS(TMPL_MODE)
94 BS3_EXTERN_SYSTEM16 Bs3Lidt_Idt16
95 TMPL_BEGIN_TEXT
96 lidt [Bs3Lidt_Idt16 TMPL_WRT_SYSTEM16_OR_FLAT]
97
98%elif BS3_MODE_IS_32BIT_SYS(TMPL_MODE)
99 BS3_EXTERN_SYSTEM16 Bs3Lidt_Idt32
100 TMPL_BEGIN_TEXT
101 lidt [Bs3Lidt_Idt32 TMPL_WRT_SYSTEM16_OR_FLAT]
102
103%elif BS3_MODE_IS_64BIT_SYS(TMPL_MODE)
104 BS3_EXTERN_SYSTEM16 Bs3Lidt_Idt64
105 TMPL_BEGIN_TEXT
106 lidt [Bs3Lidt_Idt64 TMPL_WRT_SYSTEM16_OR_FLAT]
107%else
108 %error "TMPL_MODE"
109%endif
110
111%if !BS3_MODE_IS_RM_OR_V86(TMPL_MODE)
112 ;
113 ; Load the appropriate task selector.
114 ; Always 64-bit in long mode, otherwise according to TMPL_BITS.
115 ;
116 %if BS3_MODE_IS_64BIT_SYS(TMPL_MODE)
117 BS3_EXTERN_SYSTEM16 Bs3Gdte_Tss64
118 TMPL_BEGIN_TEXT
119 and byte [5 + Bs3Gdte_Tss64 TMPL_WRT_SYSTEM16_OR_FLAT], ~X86_SEL_TYPE_SYS_TSS_BUSY_MASK
120 mov ax, BS3_SEL_TSS64
121
122 %elif BS3_MODE_IS_16BIT_SYS(TMPL_MODE)
123 BS3_EXTERN_SYSTEM16 Bs3Gdte_Tss16
124 BS3_EXTERN_SYSTEM16 Bs3Gdte_Tss16DoubleFault
125 TMPL_BEGIN_TEXT
126 and byte [5 + Bs3Gdte_Tss16 TMPL_WRT_SYSTEM16_OR_FLAT], ~X86_SEL_TYPE_SYS_TSS_BUSY_MASK
127 and byte [5 + Bs3Gdte_Tss16DoubleFault TMPL_WRT_SYSTEM16_OR_FLAT], ~X86_SEL_TYPE_SYS_TSS_BUSY_MASK
128 mov ax, BS3_SEL_TSS16
129
130 %elif BS3_MODE_IS_32BIT_SYS(TMPL_MODE)
131 BS3_EXTERN_SYSTEM16 Bs3Gdte_Tss32
132 BS3_EXTERN_SYSTEM16 Bs3Gdte_Tss32DoubleFault
133 BS3_EXTERN_SYSTEM16 Bs3Tss32
134 BS3_EXTERN_SYSTEM16 Bs3Tss32DoubleFault
135 TMPL_BEGIN_TEXT
136 and byte [5 + Bs3Gdte_Tss32 TMPL_WRT_SYSTEM16_OR_FLAT], ~X86_SEL_TYPE_SYS_TSS_BUSY_MASK
137 and byte [5 + Bs3Gdte_Tss32DoubleFault TMPL_WRT_SYSTEM16_OR_FLAT], ~X86_SEL_TYPE_SYS_TSS_BUSY_MASK
138 mov eax, cr3
139 mov [X86TSS32.cr3 + Bs3Tss32 TMPL_WRT_SYSTEM16_OR_FLAT], eax
140 mov [X86TSS32.cr3 + Bs3Tss32DoubleFault TMPL_WRT_SYSTEM16_OR_FLAT], eax
141 mov ax, BS3_SEL_TSS32
142 %else
143 %error "TMPL_BITS"
144 %endif
145 ltr ax
146%endif ; !TMPL_CMN_R86
147
148%if !BS3_MODE_IS_RM_OR_V86(TMPL_MODE)
149 ;
150 ; Load the LDT.
151 ;
152 mov ax, BS3_SEL_LDT
153 lldt ax
154%endif
155
156 ;
157 ; Load ds and es; clear fs and gs.
158 ;
159%if BS3_MODE_IS_RM_OR_V86(TMPL_MODE)
160 mov ax, BS3_SEL_DATA16
161%else
162 mov ax, RT_CONCAT(BS3_SEL_R0_DS,TMPL_BITS)
163%endif
164 mov ds, ax
165 mov es, ax
166
167%if TMPL_BITS == 16
168 ; For restoring after Bs3Trap* calls below.
169 push ax
170 push ax
171
172 cmp byte [BS3_DATA16_WRT(g_uBs3CpuDetected)], BS3CPU_80286
173 jbe .skip_fs_gs
174%endif
175 xor ax, ax
176 mov fs, ax
177 mov gs, ax
178.skip_fs_gs:
179
180 ;
181 ; Set global indicating CPU mode.
182 ;
183 mov byte [BS3_DATA16_WRT(g_bBs3CurrentMode)], TMPL_MODE
184
185 ;
186 ; Install system call handler.
187 ; Always 64-bit in long mode, otherwise according to TMPL_BITS.
188 ;
189%if BS3_MODE_IS_RM_SYS(TMPL_MODE)
190 extern _Bs3TrapSystemCallHandler_rm
191 mov word [ss: BS3_TRAP_SYSCALL*4], _Bs3TrapSystemCallHandler_rm wrt CGROUP16
192 mov word [ss: BS3_TRAP_SYSCALL*4 + 2], CGROUP16
193
194%elif BS3_MODE_IS_16BIT_SYS(TMPL_MODE)
195 BS3_EXTERN_CMN Bs3Trap16SetGate
196 extern TMPL_NM(Bs3TrapSystemCallHandler)
197 BS3_BEGIN_TEXT16
198 TMPL_BEGIN_TEXT
199 push 0 ; cParams
200 push TMPL_NM(Bs3TrapSystemCallHandler) wrt CGROUP16
201 push BS3_SEL_R0_CS16
202 push 3 ; DPL
203 push X86_SEL_TYPE_SYS_286_INT_GATE
204 push BS3_TRAP_SYSCALL
205 BS3_CALL Bs3Trap16SetGate,6
206 add xSP, xCB * 6
207
208%elif BS3_MODE_IS_32BIT_SYS(TMPL_MODE)
209 BS3_EXTERN_CMN Bs3Trap32SetGate
210 extern TMPL_NM(Bs3TrapSystemCallHandler)
211 TMPL_BEGIN_TEXT
212 push 0 ; cParams
213 push dword TMPL_NM(Bs3TrapSystemCallHandler) wrt FLAT
214 push BS3_SEL_R0_CS32
215 push 3 ; DPL
216 push X86_SEL_TYPE_SYS_386_INT_GATE
217 push BS3_TRAP_SYSCALL
218 BS3_CALL Bs3Trap32SetGate,6
219 add xSP, xCB * 6
220
221%elif BS3_MODE_IS_64BIT_SYS(TMPL_MODE)
222 BS3_EXTERN_CMN Bs3Trap64SetGate
223 extern _Bs3TrapSystemCallHandler_lm64
224 TMPL_BEGIN_TEXT
225 push 0 ; bIst
226 %if BS3_MODE_IS_64BIT_CODE(TMPL_MODE)
227 push _Bs3TrapSystemCallHandler_lm64 wrt FLAT
228 %else
229 push dword 0 ; upper offset
230 push dword _Bs3TrapSystemCallHandler_lm64 wrt FLAT
231 %endif
232 push BS3_SEL_R0_CS64
233 push 3 ; DPL
234 push AMD64_SEL_TYPE_SYS_INT_GATE
235 push BS3_TRAP_SYSCALL
236 BS3_CALL Bs3Trap64SetGate,6
237 add xSP, xCB * 5 + 8
238%else
239 %error "TMPL_BITS"
240%endif
241
242%if TMPL_BITS == 16
243 ; Restoring ds and es after the above calls.
244 pop es
245 pop ds
246%endif
247
248 ;
249 ; Epilogue.
250 ;
251%if TMPL_BITS == 64
252 pop r9
253 pop r8
254 pop rdx
255 pop rcx
256%endif
257 pop xAX
258%ifdef BS3_STRICT
259 cmp xBP, xSP
260 je .return_stack_ok
261 int3
262.return_stack_ok:
263%endif
264 pop xBP
265 ret
266BS3_PROC_END_MODE Bs3EnteredMode
267
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