bootsector2-common-init-traps.mac@ 106317

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1	; $Id: bootsector2-common-init-traps.mac 106061 2024-09-16 14:03:52Z vboxsync $
2	;; @file
3	; Common bootsector code init, traps.
4	;
5	; This is included from bootsector2-common-init-code.mac and was split out of
6	; that file to keep the size manageable.
7	;
8
9	;
10	; Copyright (C) 2007-2024 Oracle and/or its affiliates.
11	;
12	; This file is part of VirtualBox base platform packages, as
13	; available from https://www.virtualbox.org.
14	;
15	; This program is free software; you can redistribute it and/or
16	; modify it under the terms of the GNU General Public License
17	; as published by the Free Software Foundation, in version 3 of the
18	; License.
19	;
20	; This program is distributed in the hope that it will be useful, but
21	; WITHOUT ANY WARRANTY; without even the implied warranty of
22	; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
23	; General Public License for more details.
24	;
25	; You should have received a copy of the GNU General Public License
26	; along with this program; if not, see <https://www.gnu.org/licenses>.
27	;
28	; The contents of this file may alternatively be used under the terms
29	; of the Common Development and Distribution License Version 1.0
30	; (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
31	; in the VirtualBox distribution, in which case the provisions of the
32	; CDDL are applicable instead of those of the GPL.
33	;
34	; You may elect to license modified versions of this file under the
35	; terms and conditions of either the GPL or the CDDL or both.
36	;
37	; SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
38	;
39
40	%ifndef BS2_WITH_TRAPS
41	%error "huh? BS2_WITH_TRAPS is not defined!"
42	%endif
43
44
45	;*******************************************************************************
46	;* Header Files *
47	;*******************************************************************************
48	%include "bootsector2-structures.mac"
49	%include "bootsector2-api.mac"
50
51
52	;*******************************************************************************
53	;* Global Variables *
54	;*******************************************************************************
55	BEGINCODELOW
56	ALIGNDATA(8)
57	;; Where to resume execution after a trap (if g_fTrapPrepared is set).
58	; @internal
59	g_TrapResumeRIP:
60	dq 0
61	;; Set if we've prepared for a trap.
62	; @internal
63	g_fTrapPrepared:
64	db 0
65	;; Benchmark indicator.
66	; This is set to the expected trap number when we're benchmarking and 0ffh when
67	; we aren't benchmarking.
68	; @internal
69	g_u8TrapBenchmarkNo:
70	db 0ffh
71	db 0 ; alignment padding.
72	;; The last trap number.
73	GLOBALNAME g_u8LastTrapNo
74	db 0
75	;; The number of traps since last call to Bs2TrapReset.
76	GLOBALNAME g_u32cTraps
77	dd 0
78	;; The last trap error code.
79	GLOBALNAME g_u64LastTrapErr
80	dq 0
81	;; The register frame of the last trap (BS2REGS).
82	GLOBALNAME g_LastTrapRegs
83	times (BS2REGS_size) db 0
84
85	;; The RFLAGS/EFLAGS inside last invoked trap handler.
86	GLOBALNAME g_u64LastTrapHandlerRFlags
87	dq 0
88	;; The CS inside last invoked trap handler.
89	GLOBALNAME g_u16LastTrapHandlerCS
90	dw 0
91	;; The SS inside last invoked trap handler.
92	GLOBALNAME g_u16LastTrapHandlerSS
93	dw 0
94	dw 0,0 ; alignment
95	;; The RSP inside the last invoked trap handler, i.e. when bs2Trap_XX_32bit is
96	; entered, so including fake error code and vector number.
97	GLOBALNAME g_u64LastTrapHandlerRSP
98	dq 0
99
100	;;
101	; Pointer to an array of BS2TRAPREC1 records.
102	GLOBALNAME g_paTrapRecs
103	dq 0
104	;; Number of entries in the array g_paTrapRecs points to.
105	GLOBALNAME g_cTrapRecs
106	dd 0
107	;; The index of the last BS2TRAPREC1 we hit.
108	GLOBALNAME g_iTrapRecLast
109	dd 0
110	;; The base address the BS2TRAPREC.offWhere values are relative to.
111	GLOBALNAME g_pTrapRecBase
112	dq 0
113
114
115	;;
116	; Reset all the trap globals to default.
117	;
118	; This undos the effect of any previous Bs2TrapPrepare call.
119	;
120	; @uses nothing.
121	;
122	BEGINCODELOW
123	BITS 16
124	BEGINPROC Bs2TrapReset_rm16
125	push xBP
126	mov xBP, xSP
127	push ds
128	push word 0
129	pop ds
130
131	mov dword [g_u32cTraps], 0
132	mov byte [g_u8LastTrapNo], 0ffh
133	mov dword [g_u64LastTrapErr], 0
134	mov dword [g_u64LastTrapErr + 4], 0
135	mov dword [g_TrapResumeRIP], 0
136	mov dword [g_TrapResumeRIP + 4], 0
137	mov byte [g_u8TrapBenchmarkNo], 0ffh
138	mov byte [g_fTrapPrepared], 0
139
140	pop ds
141	leave
142	ret
143	ENDPROC Bs2TrapReset_rm16
144
145
146	;;
147	; Reset all the trap globals to default.
148	;
149	; This undos the effect of any previous Bs2TrapPrepare call.
150	;
151	; @uses nothing.
152	;
153	BEGINCODELOW
154	BITS 16
155	BEGINPROC Bs2TrapReset_p16
156	push ds
157	push BS2_SEL_DS16
158	pop ds
159
160	mov dword [g_u32cTraps], 0
161	mov byte [g_u8LastTrapNo], 0ffh
162	mov dword [g_u64LastTrapErr], 0
163	mov dword [g_u64LastTrapErr + 4], 0
164	mov dword [g_TrapResumeRIP], 0
165	mov dword [g_TrapResumeRIP + 4], 0
166	mov byte [g_u8TrapBenchmarkNo], 0ffh
167	mov byte [g_fTrapPrepared], 0
168
169	pop ds
170	ret
171	ENDPROC Bs2TrapReset_p16
172
173
174
175	;;
176	; Reset all the trap globals to default.
177	;
178	; This undos the effect of any previous Bs2TrapPrepare call.
179	;
180	; @uses nothing.
181	;
182	BEGINCODEHIGH
183	BITS 32
184	BEGINPROC Bs2TrapReset_p32
185	push ds
186	push BS2_SEL_DS32
187	pop ds
188
189	mov dword [g_u32cTraps], 0
190	mov byte [g_u8LastTrapNo], 0ffh
191	mov dword [g_u64LastTrapErr], 0
192	mov dword [g_u64LastTrapErr + 4], 0
193	mov dword [g_TrapResumeRIP], 0
194	mov dword [g_TrapResumeRIP + 4], 0
195	mov byte [g_u8TrapBenchmarkNo], 0ffh
196	mov byte [g_fTrapPrepared], 0
197
198	pop ds
199	ret
200	ENDPROC Bs2TrapReset_p32
201
202
203	;;
204	; Reset all the trap globals to default.
205	;
206	; This undos the effect of any previous Bs2TrapPrepare call.
207	;
208	; @uses nothing.
209	;
210	BEGINCODEHIGH
211	BITS 64
212	BEGINPROC Bs2TrapReset_p64
213	mov dword [g_u32cTraps], 0
214	mov byte [g_u8LastTrapNo], 0ffh
215	mov qword [g_u64LastTrapErr], 0
216	mov qword [g_TrapResumeRIP], 0
217	mov byte [g_u8TrapBenchmarkNo], 0ffh
218	mov byte [g_fTrapPrepared], 0
219	ret
220	ENDPROC Bs2TrapReset_p64
221
222
223
224	;;
225	; Prepare for a test that will trap.
226	;
227	; @param xAX Where to resume after the trap.
228	; @param dl Set to 0ffh for tests and the expected trap number when
229	; preparing a benchmark.
230	; @uses nothing.
231	;
232	BEGINCODELOW
233	BITS 16
234	BEGINPROC Bs2TrapPrepare_rm16
235	push xBP
236	mov xBP, xSP
237	push ds
238	push word 0
239	pop ds
240
241	mov dword [g_u32cTraps], 0
242	mov byte [g_u8LastTrapNo], 0ffh
243	mov dword [g_u64LastTrapErr], 0
244	mov dword [g_u64LastTrapErr + 4], 0
245	mov word [g_TrapResumeRIP], ax
246	mov word [g_TrapResumeRIP + 2], 0
247	mov dword [g_TrapResumeRIP + 4], 0
248	mov byte [g_u8TrapBenchmarkNo], dl
249	mov byte [g_fTrapPrepared], 1
250
251	pop ds
252	leave
253	ret
254	ENDPROC Bs2TrapPrepare_rm16
255
256
257	;;
258	; Prepare for a test that will trap.
259	;
260	; @param ax Where to resume after the trap.
261	; @param dl Set to 0ffh for tests and the expected trap number when
262	; preparing a benchmark.
263	; @uses nothing.
264	;
265	BEGINCODELOW
266	BITS 16
267	BEGINPROC Bs2TrapPrepare_p16
268	push ds
269	push BS2_SEL_DS16
270	pop ds
271
272	mov dword [g_u32cTraps], 0
273	mov byte [g_u8LastTrapNo], 0ffh
274	mov dword [g_u64LastTrapErr], 0
275	mov dword [g_u64LastTrapErr + 4], 0
276	mov word [g_TrapResumeRIP], ax
277	mov word [g_TrapResumeRIP + 2], 0
278	mov dword [g_TrapResumeRIP + 4], 0
279	mov byte [g_u8TrapBenchmarkNo], dl
280	mov byte [g_fTrapPrepared], 1
281
282	pop ds
283	ret
284	ENDPROC Bs2TrapPrepare_p16
285
286
287	;;
288	; Prepare for a test that will trap.
289	;
290	; @param eax Where to resume after the trap.
291	; @param dl Set to 0ffh for tests and the expected trap number when
292	; preparing a benchmark.
293	; @uses nothing.
294	;
295	BEGINCODEHIGH
296	BITS 32
297	BEGINPROC Bs2TrapPrepare_p32
298	push ds
299	push BS2_SEL_DS32
300	pop ds
301
302	mov dword [g_u32cTraps], 0
303	mov byte [g_u8LastTrapNo], 0ffh
304	mov dword [g_u64LastTrapErr], 0
305	mov dword [g_u64LastTrapErr + 4], 0
306	mov dword [g_TrapResumeRIP], eax
307	mov dword [g_TrapResumeRIP + 4], 0
308	mov byte [g_u8TrapBenchmarkNo], dl
309	mov byte [g_fTrapPrepared], 1
310
311	pop ds
312	ret
313	ENDPROC Bs2TrapPrepare_p32
314
315
316	;;
317	; Prepare for a test that will trap.
318	;
319	; @param rax Where to resume after the trap.
320	; @param dl Set to 0ffh for tests and the expected trap number when
321	; preparing a benchmark.
322	; @uses nothing.
323	;
324	BEGINCODEHIGH
325	BITS 64
326	BEGINPROC Bs2TrapPrepare_p64
327	mov dword [g_u32cTraps], 0
328	mov byte [g_u8LastTrapNo], 0ffh
329	mov qword [g_u64LastTrapErr], 0
330	mov qword [g_TrapResumeRIP], rax
331	mov byte [g_u8TrapBenchmarkNo], dl
332	mov byte [g_fTrapPrepared], 1
333	ret
334	ENDPROC Bs2TrapPrepare_p64
335
336
337	BEGINCODELOW ; The TSSes, IDTs and handlers must be 16-bit addressable.
338
339	%ifdef BS2_INC_CMN_PM
340	;
341	; 32-bit TSS (X86TSS32).
342	;
343	ALIGNDATA(16)
344	bs2Tss32Bit:
345	dw 07fffh ; selPrev - Back link to previous task. (static)
346	dw 0h ; padding1;
347	dd BS2_R0_STACK_ADDR ; esp0 - Ring-0 stack pointer. (static)
348	dw BS2_SEL_SS32 ; ss0
349	dw 0 ; padding
350	dd BS2_R1_STACK_ADDR ; esp1 - Ring-1 stack pointer. (static)
351	dw 0 ; ss1
352	dw 0 ; padding
353	dd BS2_R2_STACK_ADDR ; esp2 - Ring-1 stack pointer. (static)
354	dw 0 ; ss2
355	dw 0 ; padding
356	dd 0ffffffffh ; cr3 - Page directory for the task. (static)
357	dd 0 ; eip - EIP before task switch.
358	dd 0 ; eflags - EFLAGS before task switch.
359	dd 0 ; eax - EAX before task switch.
360	dd 0 ; ecx - ECX before task switch.
361	dd 0 ; edx - EDX before task switch.
362	dd 0 ; ebx - EBX before task switch.
363	dd 0 ; esp - ESP before task switch.
364	dd 0 ; ebp - EBP before task switch.
365	dd 0 ; esi - ESI before task switch.
366	dd 0 ; edi - EDI before task switch.
367	dw 0, 0 ; es,pad - ES before task switch.
368	dw 0, 0 ; cs,pad - CS before task switch.
369	dw 0, 0 ; ss,pad - SS before task switch.
370	dw 0, 0 ; ds,pad - DS before task switch.
371	dw 0, 0 ; fs,pad - FS before task switch.
372	dw 0, 0 ; gs,pad - GS before task switch.
373	dw 0, 0 ; ldt,pad - LDTR before task switch.
374	dw 0 ; fDebugTrap - Debug trap flag.
375	dw 7fffh ; offIoBitmap - Offset relative to the TSS of the
376	; start of the I/O Bitmap and the end of the
377	; interrupt redirection bitmap.
378	; IntRedirBitmap - 32 bytes for the virtual interrupt redirection bitmap. (VME)
379	bs2Tss32BitEnd:
380	times (68h - (bs2Tss32BitEnd - bs2Tss32Bit)) db 0
381	times ((bs2Tss32BitEnd - bs2Tss32Bit) - 68h) db 0
382
383
384	;
385	; 32-bit TSS for #DF (X86TSS32).
386	;
387	ALIGNDATA(16)
388	bs2Tss32BitDf:
389	dw 07fffh ; selPrev - Back link to previous task. (static)
390	dw 0h ; padding1;
391	dd BS2_DF_R0_STACK_ADDR ; esp0 - Ring-0 stack pointer. (static)
392	dw BS2_SEL_SS32 ; ss0
393	dw 0 ; padding
394	dd 0 ; esp1 - Ring-1 stack pointer. (static)
395	dw 0 ; ss1
396	dw 0 ; padding
397	dd 0 ; esp2 - Ring-1 stack pointer. (static)
398	dw 0 ; ss2
399	dw 0 ; padding
400	dd 0ffffffffh ; cr3 - Page directory for the task. (static)
401	dd bs2Trap_08h_32bit ; eip - EIP before task switch. */
402	dd 0 ; eflags - EFLAGS before task switch. */
403	dd 0 ; eax - EAX before task switch. */
404	dd 0 ; ecx - ECX before task switch. */
405	dd 0 ; edx - EDX before task switch. */
406	dd 0 ; ebx - EBX before task switch. */
407	dd BS2_DF_R0_STACK_ADDR ; esp - ESP before task switch. */
408	dd 0 ; ebp - EBP before task switch. */
409	dd 0 ; esi - ESI before task switch. */
410	dd 0 ; edi - EDI before task switch. */
411	dw BS2_SEL_DS32, 0 ; es,pad - ES before task switch. */
412	dw BS2_SEL_CS32, 0 ; cs,pad - CS before task switch. */
413	dw BS2_SEL_SS32, 0 ; ss,pad - SS before task switch. */
414	dw BS2_SEL_DS32, 0 ; ds,pad - DS before task switch. */
415	dw BS2_SEL_DS32, 0 ; fs,pad - FS before task switch. */
416	dw BS2_SEL_DS32, 0 ; gs,pad - GS before task switch. */
417	dw 0, 0 ; ldt,pad- LDTR before task switch. */
418	dw 0 ; fDebugTrap - Debug trap flag.
419	dw 7fffh ; offIoBitmap - Offset relative to the TSS of the
420	; start of the I/O Bitmap and the end of the
421	; interrupt redirection bitmap.
422	; IntRedirBitmap - 32 bytes for the virtual interrupt redirection bitmap. (VME)
423	bs2Tss32BitDfEnd:
424	times (68h - (bs2Tss32BitDfEnd - bs2Tss32BitDf)) db 0
425	times ((bs2Tss32BitDfEnd - bs2Tss32BitDf) - 68h) db 0
426
427
428	;
429	; 32-bit IDT (X86DESCGATE).
430	;
431	ALIGNDATA(16)
432	bs2Idt32bit:
433	dw bs2Trap_00h_32bit, BS2_SEL_CS32, 08e00h, 00000h ; p=1 dpl=0 type=int32gate
434	dw bs2Trap_01h_32bit, BS2_SEL_CS32, 08e00h, 00000h ; p=1 dpl=0 type=int32gate
435	dw bs2Trap_02h_32bit, BS2_SEL_CS32, 08e00h, 00000h ; p=1 dpl=0 type=int32gate
436	bs2Idt32bit_BP:
437	dw bs2Trap_03h_32bit, BS2_SEL_CS32, 08e00h, 00000h ; p=1 dpl=0 type=int32gate
438	dw bs2Trap_04h_32bit, BS2_SEL_CS32, 08e00h, 00000h ; p=1 dpl=0 type=int32gate
439	dw bs2Trap_05h_32bit, BS2_SEL_CS32, 08e00h, 00000h ; p=1 dpl=0 type=int32gate
440	dw bs2Trap_06h_32bit, BS2_SEL_CS32, 08e00h, 00000h ; p=1 dpl=0 type=int32gate
441	dw bs2Trap_07h_32bit, BS2_SEL_CS32, 08e00h, 00000h ; p=1 dpl=0 type=int32gate
442	dw 0, BS2_SEL_TSS32_DF, 08500h, 00000h ; p=1 dpl=0 type=taskgate
443	dw bs2Trap_09h_32bit, BS2_SEL_CS32, 08e00h, 00000h ; p=1 dpl=0 type=int32gate
444	dw bs2Trap_0ah_32bit, BS2_SEL_CS32, 08e00h, 00000h ; p=1 dpl=0 type=int32gate
445	dw bs2Trap_0bh_32bit, BS2_SEL_CS32, 08e00h, 00000h ; p=1 dpl=0 type=int32gate
446	dw bs2Trap_0ch_32bit, BS2_SEL_CS32, 08e00h, 00000h ; p=1 dpl=0 type=int32gate
447	dw bs2Trap_0dh_32bit, BS2_SEL_CS32, 08e00h, 00000h ; p=1 dpl=0 type=int32gate
448	dw bs2Trap_0eh_32bit, BS2_SEL_CS32, 08e00h, 00000h ; p=1 dpl=0 type=int32gate
449	dw bs2Trap_0fh_32bit, BS2_SEL_CS32, 08e00h, 00000h ; p=1 dpl=0 type=int32gate
450	dw bs2Trap_10h_32bit, BS2_SEL_CS32, 08e00h, 00000h ; p=1 dpl=0 type=int32gate
451	dw bs2Trap_11h_32bit, BS2_SEL_CS32, 08e00h, 00000h ; p=1 dpl=0 type=int32gate
452	dw bs2Trap_12h_32bit, BS2_SEL_CS32, 08e00h, 00000h ; p=1 dpl=0 type=int32gate
453	dw bs2Trap_13h_32bit, BS2_SEL_CS32, 08e00h, 00000h ; p=1 dpl=0 type=int32gate
454	dw bs2Trap_14h_32bit, BS2_SEL_CS32, 08e00h, 00000h ; p=1 dpl=0 type=int32gate
455	dw bs2Trap_15h_32bit, BS2_SEL_CS32, 08e00h, 00000h ; p=1 dpl=0 type=int32gate
456	dw bs2Trap_16h_32bit, BS2_SEL_CS32, 08e00h, 00000h ; p=1 dpl=0 type=int32gate
457	dw bs2Trap_17h_32bit, BS2_SEL_CS32, 08e00h, 00000h ; p=1 dpl=0 type=int32gate
458	dw bs2Trap_18h_32bit, BS2_SEL_CS32, 08e00h, 00000h ; p=1 dpl=0 type=int32gate
459	dw bs2Trap_19h_32bit, BS2_SEL_CS32, 08e00h, 00000h ; p=1 dpl=0 type=int32gate
460	dw bs2Trap_1ah_32bit, BS2_SEL_CS32, 08e00h, 00000h ; p=1 dpl=0 type=int32gate
461	dw bs2Trap_1bh_32bit, BS2_SEL_CS32, 08e00h, 00000h ; p=1 dpl=0 type=int32gate
462	dw bs2Trap_1ch_32bit, BS2_SEL_CS32, 08e00h, 00000h ; p=1 dpl=0 type=int32gate
463	dw bs2Trap_1dh_32bit, BS2_SEL_CS32, 08e00h, 00000h ; p=1 dpl=0 type=int32gate
464	dw bs2Trap_1eh_32bit, BS2_SEL_CS32, 08e00h, 00000h ; p=1 dpl=0 type=int32gate
465	dw bs2Trap_1fh_32bit, BS2_SEL_CS32, 08e00h, 00000h ; p=1 dpl=0 type=int32gate
466	dw bs2TrapService32bit,BS2_SEL_CS32,0ee00h, 00000h, 0, 0, 0, 0 ; p=1 dpl=3 type=int32gate
467	%define BS2_TRAP_SERVICE_NO 30h
468	;; @todo
469	bs2Idt32bitEnd
470
471	;
472	; 32-bit trap handlers.
473	;
474	BITS 32
475	%macro bs2Trap_XX_32bit_macro 1
476	bs2Trap_ %+ %1 %+ _32bit:
477	push %1
478	jmp bs2Trap_XX_32bit
479	%endmacro
480	%macro bs2Trap_XX_32bit_macro_no_err 1
481	bs2Trap_ %+ %1 %+ _32bit:
482	push 0
483	push %1
484	jmp bs2Trap_XX_32bit
485	%endmacro
486	bs2Trap_XX_32bit_macro_no_err 00h
487	bs2Trap_XX_32bit_macro_no_err 01h
488	bs2Trap_XX_32bit_macro_no_err 02h
489	bs2Trap_XX_32bit_macro_no_err 03h
490	bs2Trap_XX_32bit_macro_no_err 04h
491	bs2Trap_XX_32bit_macro_no_err 05h
492	bs2Trap_XX_32bit_macro_no_err 06h
493	bs2Trap_XX_32bit_macro_no_err 07h
494	bs2Trap_XX_32bit_macro 08h
495	bs2Trap_XX_32bit_macro_no_err 09h
496	bs2Trap_XX_32bit_macro 0ah
497	bs2Trap_XX_32bit_macro 0bh
498	bs2Trap_XX_32bit_macro 0ch
499	bs2Trap_XX_32bit_macro 0dh
500	bs2Trap_XX_32bit_macro 0eh
501	bs2Trap_XX_32bit_macro_no_err 0fh
502	bs2Trap_XX_32bit_macro_no_err 10h
503	bs2Trap_XX_32bit_macro 11h
504	bs2Trap_XX_32bit_macro_no_err 12h
505	bs2Trap_XX_32bit_macro_no_err 13h
506	bs2Trap_XX_32bit_macro_no_err 14h
507	bs2Trap_XX_32bit_macro_no_err 15h
508	bs2Trap_XX_32bit_macro_no_err 16h
509	bs2Trap_XX_32bit_macro_no_err 17h
510	bs2Trap_XX_32bit_macro_no_err 18h
511	bs2Trap_XX_32bit_macro_no_err 19h
512	bs2Trap_XX_32bit_macro_no_err 1ah
513	bs2Trap_XX_32bit_macro_no_err 1bh
514	bs2Trap_XX_32bit_macro_no_err 1ch
515	bs2Trap_XX_32bit_macro_no_err 1dh
516	bs2Trap_XX_32bit_macro_no_err 1eh
517	bs2Trap_XX_32bit_macro_no_err 1fh
518
519	;;
520	; Common 32-bit trap handler.
521	;
522	; return GS ebp + 2ch - v86
523	; return FS ebp + 28h - v86
524	; return DS ebp + 24h - v86
525	; return ES ebp + 20h - v86
526	; return SS ebp + 1ch - higher privilege
527	; return ESP ebp + 18h - higher privilege
528	; return EFLAGS ebp + 14h
529	; return CS ebp + 10h
530	; return EIP ebp + 0ch
531	; error code ebp + 08h
532	; vector # ebp + 04h
533	BITS 32
534	BEGINCODEHIGH
535	BEGINPROC bs2Trap_XX_32bit
536	push ebp ; ebp + 00h
537	mov ebp, esp
538	pushfd ; ebp - 04h
539	push eax ; ebp - 08h
540	push ebx ; ebp - 0ch
541	push ecx ; ebp - 10h
542	push ds ; ebp - 14h
543
544	mov eax, ss ; load flat DS. Using SS here because of conforming IDTE.CS tests.
545	mov ds, ax
546
547	pushfd ; Clear the AC flag.
548	and dword [esp], ~X86_EFL_AC
549	popfd
550
551	;
552	; Benchmark mode? Then resume the action right away!
553	;
554	mov eax, [ebp + 04h]
555	cmp [g_u8TrapBenchmarkNo], al
556	jne .test_mode
557	cmp byte [g_fTrapPrepared], 0
558	je .test_mode
559	mov eax, [g_TrapResumeRIP]
560	mov [ebp + 0ch], eax
561
562	pop ds
563	pop ecx
564	pop ebx
565	;pop eax
566	;popfd
567	leave
568	add esp, 08h ; Skip the vector # and error code.
569	xor eax, eax
570	iret
571
572
573	;
574	; Update the globals.
575	;
576	.test_mode:
577	xor ecx, ecx ; zero register
578	inc dword [g_u32cTraps]
579	mov eax, [ebp + 04h]
580	mov [g_u8LastTrapNo], al
581	mov eax, [ebp + 08h]
582	mov [g_u64LastTrapErr], eax
583	mov [g_u64LastTrapErr + 4], ecx
584	mov eax, [ebp - 04h]
585	mov [g_u64LastTrapHandlerRFlags], eax
586	mov dword [g_u64LastTrapHandlerRFlags + 4], ecx
587	mov ax, cs
588	mov [g_u16LastTrapHandlerCS], ax
589	mov ax, ss
590	mov [g_u16LastTrapHandlerSS], ax
591	lea eax, [ebp + 4]
592	mov [g_u64LastTrapHandlerRSP], eax
593	mov [g_u64LastTrapHandlerRSP + 4], ecx
594
595	;
596	; Save the registers.
597	;
598	lea ebx, [g_LastTrapRegs]
599	mov eax, [ebp - 08h]
600	mov [ebx + BS2REGS.rax], eax
601	mov [ebx + BS2REGS.rax + 4], ecx
602	mov eax, [ebp - 0ch]
603	mov [ebx + BS2REGS.rbx], eax
604	mov [ebx + BS2REGS.rbx + 4], ecx
605	mov eax, [ebp - 10h]
606	mov [ebx + BS2REGS.rcx], eax
607	mov [ebx + BS2REGS.rcx + 4], ecx
608	mov [ebx + BS2REGS.rdx], edx
609	mov [ebx + BS2REGS.rdx + 4], ecx
610	mov [ebx + BS2REGS.rdi], edi
611	mov [ebx + BS2REGS.rdi + 4], ecx
612	mov [ebx + BS2REGS.rsi], esi
613	mov [ebx + BS2REGS.rsi + 4], ecx
614	mov eax, [ebp]
615	mov [ebx + BS2REGS.rbp], eax
616	mov [ebx + BS2REGS.rbp + 4], ecx
617	mov eax, [ebp + 0ch]
618	mov [ebx + BS2REGS.rip], eax
619	mov [ebx + BS2REGS.rip + 4], ecx
620	mov [ebx + BS2REGS.r8], ecx
621	mov [ebx + BS2REGS.r8 + 4], ecx
622	mov [ebx + BS2REGS.r9], ecx
623	mov [ebx + BS2REGS.r9 + 4], ecx
624	mov [ebx + BS2REGS.r10], ecx
625	mov [ebx + BS2REGS.r10 + 4], ecx
626	mov [ebx + BS2REGS.r11], ecx
627	mov [ebx + BS2REGS.r11 + 4], ecx
628	mov [ebx + BS2REGS.r12], ecx
629	mov [ebx + BS2REGS.r12 + 4], ecx
630	mov [ebx + BS2REGS.r13], ecx
631	mov [ebx + BS2REGS.r13 + 4], ecx
632	mov [ebx + BS2REGS.r14], ecx
633	mov [ebx + BS2REGS.r14 + 4], ecx
634	mov [ebx + BS2REGS.r15], ecx
635	mov [ebx + BS2REGS.r15 + 4], ecx
636	mov eax, [ebp + 14h]
637	mov [ebx + BS2REGS.rflags], eax
638	mov [ebx + BS2REGS.rflags+4],ecx
639	mov eax, [ebp + 10h]
640	mov [ebx + BS2REGS.cs], ax
641	mov [ebx + BS2REGS.cBits], byte 32
642
643	; Part of the stack varies depending on the trap context.
644	test dword [ebx + BS2REGS.rflags], X86_EFL_VM
645	jnz .v86
646	test ax, 7h
647	jz .ring0
648
649	.ring0:
650	lea eax, [ebp + 18h]
651	mov [ebx + BS2REGS.rsp], eax
652	mov [ebx + BS2REGS.rsp + 4], ecx
653	mov [ebx + BS2REGS.ss], ss
654	mov eax, [ebp - 14h]
655	mov [ebx + BS2REGS.ds], ax
656	mov [ebx + BS2REGS.es], es
657	mov [ebx + BS2REGS.fs], fs
658	mov [ebx + BS2REGS.gs], gs
659	jmp .do_crX
660
661	.higher_privilege:
662	mov eax, [ebp + 18h]
663	mov [ebx + BS2REGS.rsp], eax
664	mov [ebx + BS2REGS.rsp + 4], ecx
665	mov eax, [ebp + 20h]
666	mov [ebx + BS2REGS.ss], ax
667	mov eax, [ebp - 14h]
668	mov [ebx + BS2REGS.ds], ax
669	mov [ebx + BS2REGS.es], es
670	mov [ebx + BS2REGS.fs], fs
671	mov [ebx + BS2REGS.gs], gs
672	jmp .do_crX
673
674	.v86:
675	mov eax, [ebp + 18h]
676	mov [ebx + BS2REGS.rsp], eax
677	mov [ebx + BS2REGS.rsp + 4], ecx
678	mov eax, [ebp + 1ch]
679	mov [ebx + BS2REGS.ss], ax
680	mov eax, [ebp + 24h]
681	mov [ebx + BS2REGS.ds], ax
682	mov eax, [ebp + 20h]
683	mov [ebx + BS2REGS.es], ax
684	mov eax, [ebp + 28h]
685	mov [ebx + BS2REGS.fs], ax
686	mov eax, [ebp + 2ch]
687	mov [ebx + BS2REGS.gs], ax
688	;jmp .do_crX
689
690	.do_crX:
691	; The CRx registers are only accessible from ring-0 (CS=conforming, CPL < 0)
692	test byte [ebx + BS2REGS.ss], 3
693	jnz .skip_crX
694	mov eax, cr0
695	mov [ebx + BS2REGS.cr0], eax
696	mov [ebx + BS2REGS.cr0 + 4], ecx
697	mov eax, cr2
698	mov [ebx + BS2REGS.cr2], eax
699	mov [ebx + BS2REGS.cr2 + 4], ecx
700	mov eax, cr3
701	mov [ebx + BS2REGS.cr3], eax
702	mov [ebx + BS2REGS.cr3 + 4], ecx
703	mov eax, cr4
704	mov [ebx + BS2REGS.cr4], eax
705	mov [ebx + BS2REGS.cr4 + 4], ecx
706	mov [ebx + BS2REGS.cr8], ecx
707	mov [ebx + BS2REGS.cr8 + 4], ecx
708	.skip_crX:
709
710	;
711	; Advance to a prepared resume position or panic.
712	;
713	cmp byte [g_fTrapPrepared], 0
714	je .no_resume_pos
715	mov byte [g_fTrapPrepared], 0
716	mov eax, [g_TrapResumeRIP]
717	mov [ebp + 0ch], eax
718
719	.resume:
720	%ifdef BS2_WITH_XCPT_DB_CLEARING_TF
721	cmp byte [ebp + 04h], X86_XCPT_DB ; make sure we won't trap again due to a TF.
722	jne .resume_no_clear_trap_flags
723	and word [ebp + 14h], ~X86_EFL_TF
724	.resume_no_clear_trap_flags:
725	%endif
726	pop ds
727	pop ecx
728	pop ebx
729	pop eax
730	;popfd
731	leave
732	add esp, 8h
733	iret
734
735
736	.no_resume_pos:
737	;
738	; Look for a trap record.
739	;
740	mov ecx, [g_cTrapRecs] ; the number of records.
741	test ecx, ecx
742	jz .panic
743	mov eax, [g_LastTrapRegs + BS2REGS.rip]
744	sub eax, [g_pTrapRecBase] ; the offWhere we're looking for.
745	jb .panic
746
747	; Look starting at the previous record first.
748	mov ebx, [g_iTrapRecLast]
749	sub ecx, ebx
750	jbe .traprec_loop2 ; g_iTrapRecLast is out of range.
751	shl ebx, BS2TRAPREC_SIZE_SHIFT
752	add ebx, [g_paTrapRecs] ; ebx points to the record we hit last time.
753	.traprec_loop1_next:
754	cmp [ebx + BS2TRAPREC.offWhere], eax
755	je .traprec_found
756	add ebx, BS2TRAPREC_size
757	dec ecx
758	jnz .traprec_loop1_next
759
760	; Start searching from the start, stopping at the previous record.
761	.traprec_loop2:
762	mov ecx, [g_iTrapRecLast]
763	or ecx, ecx
764	jz .panic ; not found.
765	mov ebx, [g_paTrapRecs]
766	.traprec_loop2_next:
767	cmp [ebx + BS2TRAPREC.offWhere], eax
768	je .traprec_found
769	add ebx, BS2TRAPREC_size
770	dec ecx
771	jnz .traprec_loop2_next
772	jmp .panic ; not found
773
774	.traprec_found:
775	; Remember the hit for the next trap.
776	mov eax, ebx
777	sub eax, [g_paTrapRecs]
778	shr eax, BS2TRAPREC_SIZE_SHIFT
779	mov [g_iTrapRecLast], eax
780
781	;
782	; Fail the test if we got the wrong trap or error code.
783	;
784	mov al, [g_u8LastTrapNo]
785	cmp al, [ebx + BS2TRAPREC.u8TrapNo]
786	je .traprec_ok_trap
787	push eax
788	movzx eax, byte [ebx + BS2TRAPREC.u8TrapNo]
789	push eax
790	push .s_szWrongTrap
791	call NAME(TestFailedF_p32)
792	add esp, 12
793
794	.traprec_ok_trap:
795	mov ax, [g_u64LastTrapErr]
796	cmp ax, [ebx + BS2TRAPREC.u16ErrCd]
797	je .traprec_ok_err_cd
798	push eax
799	movzx eax, word [ebx + BS2TRAPREC.u16ErrCd]
800	push eax
801	push .s_szWrongErrCd
802	call NAME(TestFailedF_p32)
803	add esp, 12
804
805	.traprec_ok_err_cd:
806	;
807	; Advance the EIP and resume execution.
808	;
809	movzx eax, byte [ebx + BS2TRAPREC.offResumeAddend]
810	add eax, [g_LastTrapRegs + BS2REGS.rip]
811	mov [ebp + 0ch], eax
812	jmp .resume
813
814
815	;
816	; Write panic message and then halt.
817	;
818	.panic:
819	push dword [g_LastTrapRegs + BS2REGS.rflags]
820	push dword [g_LastTrapRegs + BS2REGS.ss]
821	push dword [g_LastTrapRegs + BS2REGS.gs]
822	push dword [g_LastTrapRegs + BS2REGS.fs]
823	push dword [g_LastTrapRegs + BS2REGS.es]
824	push dword [g_LastTrapRegs + BS2REGS.ds]
825	push dword [g_LastTrapRegs + BS2REGS.cs]
826	; line break
827	push dword [g_LastTrapRegs + BS2REGS.cr4]
828	push dword [g_LastTrapRegs + BS2REGS.cr3]
829	push dword [g_LastTrapRegs + BS2REGS.cr0]
830	push dword [g_LastTrapRegs + BS2REGS.rbp]
831	push dword [g_LastTrapRegs + BS2REGS.rsp]
832	push dword [g_LastTrapRegs + BS2REGS.rip]
833	; line break
834	push dword [g_LastTrapRegs + BS2REGS.rdi]
835	push dword [g_LastTrapRegs + BS2REGS.rsi]
836	push dword [g_LastTrapRegs + BS2REGS.rdx]
837	push dword [g_LastTrapRegs + BS2REGS.rcx]
838	push dword [g_LastTrapRegs + BS2REGS.rbx]
839	push dword [g_LastTrapRegs + BS2REGS.rax]
840	; line break
841	mov eax, [ebp + 08h]
842	push eax
843	mov eax, cr2
844	push eax
845	mov eax, [ebp + 0ch]
846	push eax
847	movzx eax, word [ebp + 10h]
848	push eax
849	movzx eax, byte [ebp + 04h]
850	push eax
851	push .s_szPanicMsg
852	call NAME(TestFailedF_p32)
853
854	call Bs2Panic
855	jmp .panic ; paranoia
856
857	.s_szPanicMsg:
858	db 'trap #%RX8 at %RX16:%RX32 cr2=%RX32 err=%RX32', 13, 10
859	db 'eax=%RX32 ebx=%RX32 ecx=%RX32 edx=%RX32 esi=%RX32 edi=%RX32', 13, 10
860	db 'eip=%RX32 esp=%RX32 ebp=%RX32 cr0=%RX32 cr3=%RX32 cr4=%RX32', 13, 10
861	db 'cs=%RX16 ds=%RX16 es=%RX16 fs=%RX16 gs=%RX16 ss=%RX16 eflags=%RX32', 13, 10
862	db 0
863	.s_szWrongTrap:
864	db 'Expected trap %RX8 got %RX8', 13, 10, 0
865	.s_szWrongErrCd:
866	db 'Expected errcd %RX16 got %RX16', 13, 10, 0
867	ENDPROC bs2Trap_XX_32bit
868
869	;;
870	; Service IRQ handler, 32-bit version.
871	;
872	; Takes requests in eax and later maybe parameters in other registers.
873	;
874	; return GS ebp + 24h - v86
875	; return FS ebp + 20h - v86
876	; return DS ebp + 1ch - v86
877	; return ES ebp + 18h - v86
878	; return SS ebp + 14h - higher privilege
879	; return ESP ebp + 10h - higher privilege
880	; return EFLAGS ebp + 0ch
881	; return CS ebp + 08h
882	; return EIP ebp + 04h
883	BEGINCODELOW
884	BEGINPROC bs2TrapService32bit
885	jmp .highsegment
886	BEGINCODEHIGH
887	.highsegment:
888	push ebp ; ebp
889	mov ebp, esp
890	push eax ; ebp - 04h
891	push edx ; ebp - 08h
892	push ecx ; ebp - 0ch
893	push ebx ; ebp - 10h
894	push ds ; ebp - 14h
895
896	mov dx, ss
897	mov ds, dx
898
899	;
900	; Classify the caller context in cl.
901	;; @todo What if CS on the stack is conforming?
902	;
903	%define BS2_TRP_SRV_CALLER_SAME_RING 0
904	%define BS2_TRP_SRV_CALLER_OTHER_RING 1
905	%define BS2_TRP_SRV_CALLER_VM 2
906	test dword [ebp + 0ch], X86_EFL_VM
907	jnz .vm_ctx
908
909	mov cx, ss
910	mov ch, [ebp + 08h] ; cs
911	and cx, 00303h
912	cmp ch, cl
913	jz .same_ctx
914	mov cl, BS2_TRP_SRV_CALLER_OTHER_RING
915	jmp .done_ctx
916	.vm_ctx:
917	mov cl, BS2_TRP_SRV_CALLER_VM
918	jmp .done_ctx
919	.same_ctx:
920	mov cl, BS2_TRP_SRV_CALLER_SAME_RING
921	.done_ctx:
922
923	;
924	; Switch (eax).
925	;
926	cmp eax, BS2_SYSCALL_TO_RING3
927	jbe .to_ringX
928
929	; Unknown request.
930	.failure:
931	mov eax, -1
932	.return: ; careful with ebp here!
933	pop ds
934	pop ebx
935	pop ecx
936	pop edx
937	;pop eax
938	leave
939	iretd
940
941	;
942	; Switching to the ring specified by eax.
943	; Annoying that ss:esp isn't always restored.
944	;
945	.to_ringX:
946	cmp cl, BS2_TRP_SRV_CALLER_VM
947	je .failure
948	sub al, BS2_SYSCALL_TO_RING0
949
950	; Fake missing stack registers if necessary.
951	cmp cl, BS2_TRP_SRV_CALLER_SAME_RING
952	jnz .have_stack_regs
953
954	sub esp, 8h
955	sub ebp, 8h
956	xor ebx, ebx
957	.move_more:
958	mov edx, [esp + 8 + ebx]
959	mov [esp + ebx], edx
960	add ebx, 4
961	cmp ebx, 9*4
962	jb .move_more
963
964	mov dx, ss
965	mov [ebp + 14h], edx
966	lea edx, [ebp + 18h]
967	mov [ebp + 10h], edx
968
969	.have_stack_regs:
970	; Translate the selector registers
971	mov dx, [ebp - 14h]
972	call bs2SRegToRing
973	mov [ebp - 14h], dx
974
975	mov dx, es
976	call bs2SRegToRing
977	mov es, dx
978
979	mov dx, fs
980	call bs2SRegToRing
981	mov fs, dx
982
983	mov dx, gs
984	call bs2SRegToRing
985	mov gs, dx
986
987	mov dx, [ebp + 08h] ; cs
988	call bs2SRegToRing
989	mov [ebp + 08h], dx
990
991	mov dx, [ebp + 14h] ; ss
992	call bs2SRegToRing
993	mov [ebp + 14h], dx
994
995	or dword [ebp + 0ch], X86_EFL_IOPL ; set IOPL=3
996
997	; If the desired target is ring-0 we cannot use iret.
998	cmp al, 0
999	je .iret_to_ring_with_stack
1000
1001	.done_success:
1002	xor eax, eax
1003	jmp .return
1004
1005	.iret_to_ring_with_stack:
1006	;
1007	; Move the iret-to-same-ring to the desired return position. By also
1008	; moving the saved ebp we make the leave instruction do stack
1009	; adjusting/switching for us.
1010	;
1011	cli ; paranoia, it's disable already.
1012	mov eax, [ebp + 10h]
1013	lea edx, [ebp + 18h]
1014	cmp eax, edx
1015	lea ecx, [ebp + 08h] ; same stack, just shifted 8 bytes
1016	je .move_iret_and_ebp
1017	mov ecx, [ebp + 10h] ; different stack.
1018	sub ecx, 10h
1019	.move_iret_and_ebp:
1020	mov edx, [ebp + 0ch]
1021	mov eax, [ebp + 08h]
1022	mov [ecx + 0ch], edx
1023	mov [ecx + 08h], eax
1024	mov edx, [ebp + 04h]
1025	mov eax, [ebp + 00h]
1026	mov [ecx + 04h], edx
1027	mov [ecx + 00h], eax
1028	mov ebp, ecx
1029	xor eax, eax
1030	jmp .return
1031
1032	ENDPROC bs2TrapService32bit
1033
1034	%endif ; BS2_INC_CMN_PM
1035
1036
1037	%ifdef BS2_INC_CMN_LM
1038	;
1039	; 64-bit TSS (X86TSS64).
1040	;
1041	BEGINCODELOW
1042	ALIGNDATA(16)
1043	bs2Tss64Bit:
1044	dd 0 ; 00h - u32Reserved - Reserved.
1045	dq BS2_R0_STACK_ADDR ; 04h - rsp0 - Ring-0 stack pointer. (static)
1046	dq BS2_R1_STACK_ADDR ; 1ch - rsp1 - Ring-1 stack pointer. (static)
1047	dq BS2_R2_STACK_ADDR ; 14h - rsp2 - Ring-2 stack pointer. (static)
1048	dq 0 ; 2ch - reserved
1049	dq BS2_DF_R0_STACK_ADDR ; 24h - ist1;
1050	dq BS2_R0_STACK_ADDR ; 3ch - ist2;
1051	dq BS2_R0_STACK_ADDR ; 34h - ist3;
1052	dq BS2_R0_STACK_ADDR ; 4ch - ist4;
1053	dq BS2_R0_STACK_ADDR ; 44h - ist5;
1054	dq BS2_R0_STACK_ADDR ; 5ch - ist6;
1055	dq BS2_R0_STACK_ADDR ; 54h - ist7;
1056	dw 0,0,0,0,0 ; 6ch - reserved
1057	dw 0 ; 76h - offIoBitmap - Offset relative to the TSS of the
1058	; 00h - start of the I/O Bitmap and the end of the
1059	; 00h - interrupt redirection bitmap.
1060	bs2Tss64BitEnd:
1061	times (68h - (bs2Tss64BitEnd - bs2Tss64Bit)) db 0
1062	times ((bs2Tss64BitEnd - bs2Tss64Bit) - 68h) db 0
1063
1064	;
1065	; 64-bit IDT (X86DESC64GATE).
1066	;
1067	BEGINCODELOW
1068	ALIGNDATA(16)
1069	bs2Idt64bit:
1070	dw bs2Trap_00h_64bit, BS2_SEL_CS64, 08e00h, 00000h, 0, 0, 0, 0 ; p=1 dpl=0 type=int64gate
1071	dw bs2Trap_01h_64bit, BS2_SEL_CS64, 08e00h, 00000h, 0, 0, 0, 0 ; p=1 dpl=0 type=int64gate
1072	dw bs2Trap_02h_64bit, BS2_SEL_CS64, 08e00h, 00000h, 0, 0, 0, 0 ; p=1 dpl=0 type=int64gate
1073	bs2Idt64bit_BP:
1074	dw bs2Trap_03h_64bit, BS2_SEL_CS64, 08e00h, 00000h, 0, 0, 0, 0 ; p=1 dpl=0 type=int64gate
1075	dw bs2Trap_04h_64bit, BS2_SEL_CS64, 08e00h, 00000h, 0, 0, 0, 0 ; p=1 dpl=0 type=int64gate
1076	dw bs2Trap_05h_64bit, BS2_SEL_CS64, 08e00h, 00000h, 0, 0, 0, 0 ; p=1 dpl=0 type=int64gate
1077	dw bs2Trap_06h_64bit, BS2_SEL_CS64, 08e00h, 00000h, 0, 0, 0, 0 ; p=1 dpl=0 type=int64gate
1078	dw bs2Trap_07h_64bit, BS2_SEL_CS64, 08e00h, 00000h, 0, 0, 0, 0 ; p=1 dpl=0 type=int64gate
1079	dw bs2Trap_08h_64bit, BS2_SEL_CS64, 08e00h, 00000h, 0, 0, 0, 0 ; p=1 dpl=0 type=int64gate
1080	dw bs2Trap_09h_64bit, BS2_SEL_CS64, 08e00h, 00000h, 0, 0, 0, 0 ; p=1 dpl=0 type=int64gate
1081	dw bs2Trap_0ah_64bit, BS2_SEL_CS64, 08e00h, 00000h, 0, 0, 0, 0 ; p=1 dpl=0 type=int64gate
1082	dw bs2Trap_0bh_64bit, BS2_SEL_CS64, 08e00h, 00000h, 0, 0, 0, 0 ; p=1 dpl=0 type=int64gate
1083	dw bs2Trap_0ch_64bit, BS2_SEL_CS64, 08e00h, 00000h, 0, 0, 0, 0 ; p=1 dpl=0 type=int64gate
1084	dw bs2Trap_0dh_64bit, BS2_SEL_CS64, 08e00h, 00000h, 0, 0, 0, 0 ; p=1 dpl=0 type=int64gate
1085	dw bs2Trap_0eh_64bit, BS2_SEL_CS64, 08e00h, 00000h, 0, 0, 0, 0 ; p=1 dpl=0 type=int64gate
1086	dw bs2Trap_0fh_64bit, BS2_SEL_CS64, 08e00h, 00000h, 0, 0, 0, 0 ; p=1 dpl=0 type=int64gate
1087	dw bs2Trap_10h_64bit, BS2_SEL_CS64, 08e00h, 00000h, 0, 0, 0, 0 ; p=1 dpl=0 type=int64gate
1088	dw bs2Trap_11h_64bit, BS2_SEL_CS64, 08e00h, 00000h, 0, 0, 0, 0 ; p=1 dpl=0 type=int64gate
1089	dw bs2Trap_12h_64bit, BS2_SEL_CS64, 08e00h, 00000h, 0, 0, 0, 0 ; p=1 dpl=0 type=int64gate
1090	dw bs2Trap_13h_64bit, BS2_SEL_CS64, 08e00h, 00000h, 0, 0, 0, 0 ; p=1 dpl=0 type=int64gate
1091	dw bs2Trap_14h_64bit, BS2_SEL_CS64, 08e00h, 00000h, 0, 0, 0, 0 ; p=1 dpl=0 type=int64gate
1092	dw bs2Trap_15h_64bit, BS2_SEL_CS64, 08e00h, 00000h, 0, 0, 0, 0 ; p=1 dpl=0 type=int64gate
1093	dw bs2Trap_16h_64bit, BS2_SEL_CS64, 08e00h, 00000h, 0, 0, 0, 0 ; p=1 dpl=0 type=int64gate
1094	dw bs2Trap_17h_64bit, BS2_SEL_CS64, 08e00h, 00000h, 0, 0, 0, 0 ; p=1 dpl=0 type=int64gate
1095	dw bs2Trap_18h_64bit, BS2_SEL_CS64, 08e00h, 00000h, 0, 0, 0, 0 ; p=1 dpl=0 type=int64gate
1096	dw bs2Trap_19h_64bit, BS2_SEL_CS64, 08e00h, 00000h, 0, 0, 0, 0 ; p=1 dpl=0 type=int64gate
1097	dw bs2Trap_1ah_64bit, BS2_SEL_CS64, 08e00h, 00000h, 0, 0, 0, 0 ; p=1 dpl=0 type=int64gate
1098	dw bs2Trap_1bh_64bit, BS2_SEL_CS64, 08e00h, 00000h, 0, 0, 0, 0 ; p=1 dpl=0 type=int64gate
1099	dw bs2Trap_1ch_64bit, BS2_SEL_CS64, 08e00h, 00000h, 0, 0, 0, 0 ; p=1 dpl=0 type=int64gate
1100	dw bs2Trap_1dh_64bit, BS2_SEL_CS64, 08e00h, 00000h, 0, 0, 0, 0 ; p=1 dpl=0 type=int64gate
1101	dw bs2Trap_1eh_64bit, BS2_SEL_CS64, 08e00h, 00000h, 0, 0, 0, 0 ; p=1 dpl=0 type=int64gate
1102	dw bs2Trap_1fh_64bit, BS2_SEL_CS64, 08e00h, 00000h, 0, 0, 0, 0 ; p=1 dpl=0 type=int64gate
1103	dw bs2TrapService64bit,BS2_SEL_CS64,0ee00h, 00000h, 0, 0, 0, 0 ; p=1 dpl=3 type=int64gate
1104	bs2Idt64bitEnd
1105
1106
1107	;
1108	; 64-bit trap handlers.
1109	;
1110	BITS 64
1111	%macro bs2Trap_XX_64bit_macro 1
1112	BEGINCODELOW
1113	bs2Trap_ %+ %1 %+ _64bit:
1114	push %1
1115	jmp bs2Trap_XX_64bit
1116	%endmacro
1117	%macro bs2Trap_XX_64bit_macro_no_err 1
1118	bs2Trap_ %+ %1 %+ _64bit:
1119	push 0
1120	push %1
1121	jmp bs2Trap_XX_64bit
1122	%endmacro
1123	bs2Trap_XX_64bit_macro_no_err 00h
1124	bs2Trap_XX_64bit_macro_no_err 01h
1125	bs2Trap_XX_64bit_macro_no_err 02h
1126	bs2Trap_XX_64bit_macro_no_err 03h
1127	bs2Trap_XX_64bit_macro_no_err 04h
1128	bs2Trap_XX_64bit_macro_no_err 05h
1129	bs2Trap_XX_64bit_macro_no_err 06h
1130	bs2Trap_XX_64bit_macro_no_err 07h
1131	bs2Trap_XX_64bit_macro 08h
1132	bs2Trap_XX_64bit_macro_no_err 09h
1133	bs2Trap_XX_64bit_macro 0ah
1134	bs2Trap_XX_64bit_macro 0bh
1135	bs2Trap_XX_64bit_macro 0ch
1136	bs2Trap_XX_64bit_macro 0dh
1137	bs2Trap_XX_64bit_macro 0eh
1138	bs2Trap_XX_64bit_macro_no_err 0fh
1139	bs2Trap_XX_64bit_macro_no_err 10h
1140	bs2Trap_XX_64bit_macro 11h
1141	bs2Trap_XX_64bit_macro_no_err 12h
1142	bs2Trap_XX_64bit_macro_no_err 13h
1143	bs2Trap_XX_64bit_macro_no_err 14h
1144	bs2Trap_XX_64bit_macro_no_err 15h
1145	bs2Trap_XX_64bit_macro_no_err 16h
1146	bs2Trap_XX_64bit_macro_no_err 17h
1147	bs2Trap_XX_64bit_macro_no_err 18h
1148	bs2Trap_XX_64bit_macro_no_err 19h
1149	bs2Trap_XX_64bit_macro_no_err 1ah
1150	bs2Trap_XX_64bit_macro_no_err 1bh
1151	bs2Trap_XX_64bit_macro_no_err 1ch
1152	bs2Trap_XX_64bit_macro_no_err 1dh
1153	bs2Trap_XX_64bit_macro_no_err 1eh
1154	bs2Trap_XX_64bit_macro_no_err 1fh
1155
1156	;;
1157	; Common 64-bit trap handler.
1158	;
1159	; return SS rbp + 38h
1160	; return RSP rbp + 30h
1161	; return RFLAGS rbp + 28h
1162	; return CS rbp + 20h
1163	; return RIP rbp + 18h
1164	; error code rbp + 10h
1165	; vector # rbp + 08h
1166	BEGINCODEHIGH
1167	BEGINPROC bs2Trap_XX_64bit
1168	push rbp ; rbp + 00h
1169	mov rbp, rsp
1170	pushfq ; rbp - 08h
1171	push rax ; rbp - 10h
1172	push rbx ; rbp - 18h
1173
1174	;
1175	; Benchmark mode? Then resume the action right away!
1176	;
1177	mov rax, [rbp + 08h]
1178	cmp [g_u8TrapBenchmarkNo], al
1179	jne .test_mode
1180	cmp byte [g_fTrapPrepared], 0
1181	je .test_mode
1182	mov rax, [g_TrapResumeRIP]
1183	mov [rbp + 18h], rax
1184
1185	pop rbx
1186	;pop rax
1187	;popfq
1188	leave
1189	add rsp, 10h ; Skip the vector # and error code.
1190	xor rax, rax
1191	iretq
1192
1193	;
1194	; Save the trap information
1195	;
1196	.test_mode:
1197	inc dword [g_u32cTraps]
1198	mov rax, [rbp + 08h]
1199	mov [g_u8LastTrapNo], al
1200	mov rax, [rbp + 10h]
1201	mov [g_u64LastTrapErr], rax
1202	mov rax, [rbp - 08h]
1203	mov [g_u64LastTrapHandlerRFlags], rax
1204	mov ax, cs
1205	mov [g_u16LastTrapHandlerCS], ax
1206	mov ax, ss
1207	mov [g_u16LastTrapHandlerSS], ax
1208	lea rax, [rbp + 8]
1209	mov [g_u64LastTrapHandlerRSP], rax
1210
1211	; Save the registers.
1212	lea rbx, [g_LastTrapRegs]
1213	mov rax, [rbp - 10h]
1214	mov [rbx + BS2REGS.rax], rax
1215	mov rax, [rbp - 18h]
1216	mov [rbx + BS2REGS.rbx], rax
1217	mov [rbx + BS2REGS.rcx], rcx
1218	mov [rbx + BS2REGS.rdx], rdx
1219	mov [rbx + BS2REGS.rdi], rdi
1220	mov [rbx + BS2REGS.rsi], rsi
1221	mov rax, [rbp]
1222	mov [rbx + BS2REGS.rbp], rax
1223	mov rax, [rbp + 30h]
1224	mov [rbx + BS2REGS.rsp], rax
1225	mov rax, [rbp + 18h]
1226	mov [rbx + BS2REGS.rip], rax
1227	mov [rbx + BS2REGS.r8], r8
1228	mov [rbx + BS2REGS.r9], r9
1229	mov [rbx + BS2REGS.r10], r10
1230	mov [rbx + BS2REGS.r11], r11
1231	mov [rbx + BS2REGS.r12], r12
1232	mov [rbx + BS2REGS.r13], r13
1233	mov [rbx + BS2REGS.r14], r14
1234	mov [rbx + BS2REGS.r15], r15
1235	mov rax, [rbp + 28h]
1236	mov [rbx + BS2REGS.rflags], rax
1237	mov rax, [rbp + 20h]
1238	mov [rbx + BS2REGS.cs], ax
1239	mov [rbx + BS2REGS.ds], ds
1240	mov [rbx + BS2REGS.es], es
1241	mov [rbx + BS2REGS.fs], fs
1242	mov [rbx + BS2REGS.gs], gs
1243	mov rax, [rbp + 38h]
1244	mov [rbx + BS2REGS.ss], ax
1245	mov [rbx + BS2REGS.cBits], byte 64
1246
1247	; The CRx registers are only accessible from ring-0 (CS=conforming, CPL < 0)
1248	test byte [rbx + BS2REGS.ss], 3
1249	jnz .skip_crX
1250	mov rax, cr0
1251	mov [rbx + BS2REGS.cr0], rax
1252	mov rax, cr2
1253	mov [rbx + BS2REGS.cr2], rax
1254	mov rax, cr3
1255	mov [rbx + BS2REGS.cr3], rax
1256	mov rax, cr4
1257	mov [rbx + BS2REGS.cr4], rax
1258	mov rax, cr8
1259	mov [rbx + BS2REGS.cr8], rax
1260	.skip_crX:
1261
1262	;
1263	; Advance to a prepared resume position or panic.
1264	;
1265	cmp byte [g_fTrapPrepared], 0
1266	je .no_resume_pos
1267	mov byte [g_fTrapPrepared], 0
1268	mov rax, [g_TrapResumeRIP]
1269	mov [rbp + 18h], rax
1270	jmp .resume
1271
1272	.resume:
1273	%ifdef BS2_WITH_XCPT_DB_CLEARING_TF
1274	cmp byte [rbp + 08h], X86_XCPT_DB ; make sure we won't trap again due to a TF.
1275	jne .resume_no_clear_trap_flags
1276	and word [rbp + 28h], ~X86_EFL_TF
1277	.resume_no_clear_trap_flags:
1278	%endif
1279	pop rbx
1280	pop rax
1281	;popfq
1282	leave
1283	add rsp, 10h
1284	iretq
1285
1286
1287	.no_resume_pos:
1288	;
1289	; Look for a trap record.
1290	;
1291	push rcx
1292
1293	mov ecx, [g_cTrapRecs] ; the number of records.
1294	test ecx, ecx
1295	jz .panic
1296	mov rax, [g_LastTrapRegs + BS2REGS.rip]
1297	sub rax, [g_pTrapRecBase] ; the offWhere we're looking for.
1298	jb .panic
1299	mov rbx, _4G
1300	cmp rax, rbx
1301	jae .panic ; out of range.
1302
1303	; Look starting at the previous record first.
1304	mov ebx, [g_iTrapRecLast]
1305	sub ecx, ebx
1306	jbe .traprec_loop2 ; g_iTrapRecLast is out of range.
1307	shl rbx, BS2TRAPREC_SIZE_SHIFT
1308	add rbx, [g_paTrapRecs] ; ebx points to the record we hit last time.
1309	.traprec_loop1_next:
1310	cmp [rbx + BS2TRAPREC.offWhere], eax
1311	je .traprec_found
1312	add rbx, BS2TRAPREC_size
1313	dec ecx
1314	jnz .traprec_loop1_next
1315
1316	; Start searching from the start, stopping at the previous record.
1317	.traprec_loop2:
1318	mov ecx, [g_iTrapRecLast]
1319	or ecx, ecx
1320	jz .panic ; not found.
1321	mov rbx, [g_paTrapRecs]
1322	.traprec_loop2_next:
1323	cmp [rbx + BS2TRAPREC.offWhere], eax
1324	je .traprec_found
1325	add rbx, BS2TRAPREC_size
1326	dec ecx
1327	jnz .traprec_loop2_next
1328	jmp .panic ; not found
1329
1330	.traprec_found:
1331	; Remember the hit for the next trap.
1332	mov rax, rbx
1333	sub rax, [g_paTrapRecs]
1334	shr rax, BS2TRAPREC_SIZE_SHIFT
1335	mov [g_iTrapRecLast], eax
1336
1337	;
1338	; Fail the test if we got the wrong trap or error code.
1339	;
1340	mov al, [g_u8LastTrapNo wrt rip]
1341	cmp al, [rbx + BS2TRAPREC.u8TrapNo]
1342	je .traprec_ok_trap
1343	push rax
1344	movzx rax, byte [rbx + BS2TRAPREC.u8TrapNo]
1345	push rax
1346	push .s_szWrongTrap
1347	call NAME(TestFailedF_p64)
1348	add rsp, 24
1349
1350	.traprec_ok_trap:
1351	mov ax, [g_u64LastTrapErr wrt rip]
1352	cmp ax, [rbx + BS2TRAPREC.u16ErrCd]
1353	je .traprec_ok_err_cd
1354	push rax
1355	movzx rax, word [rbx + BS2TRAPREC.u16ErrCd]
1356	push rax
1357	push .s_szWrongErrCd
1358	call NAME(TestFailedF_p64)
1359	add rsp, 24
1360
1361	.traprec_ok_err_cd:
1362	;
1363	; Advance the EIP and resume execution.
1364	;
1365	movzx rax, byte [rbx + BS2TRAPREC.offResumeAddend]
1366	add rax, [g_LastTrapRegs + BS2REGS.rip]
1367	mov [rbp + 18h], rax
1368
1369	pop rcx
1370	jmp .resume
1371
1372
1373	;
1374	; Format a panic message and halt.
1375	;
1376	.panic:
1377	lea rbx, [g_LastTrapRegs]
1378	; line break
1379	movzx eax, word [rbx + BS2REGS.ss]
1380	push rax
1381	movzx eax, word [rbx + BS2REGS.gs]
1382	push rax
1383	movzx eax, word [rbx + BS2REGS.fs]
1384	push rax
1385	movzx eax, word [rbx + BS2REGS.es]
1386	push rax
1387	movzx eax, word [rbx + BS2REGS.ds]
1388	push rax
1389	movzx eax, word [rbx + BS2REGS.cs]
1390	push rax
1391	; line break
1392	push qword [rbx + BS2REGS.rbp]
1393	push qword [rbx + BS2REGS.rsp]
1394	push qword [rbx + BS2REGS.rip]
1395	; line break
1396	push qword [rbx + BS2REGS.rflags]
1397	push qword [rbx + BS2REGS.r15]
1398	push qword [rbx + BS2REGS.r14]
1399	; line break
1400	push qword [rbx + BS2REGS.r13]
1401	push qword [rbx + BS2REGS.r12]
1402	push qword [rbx + BS2REGS.r11]
1403	; line break
1404	push qword [rbx + BS2REGS.r10]
1405	push qword [rbx + BS2REGS.r9]
1406	push qword [rbx + BS2REGS.r8]
1407	; line break
1408	push qword [rbx + BS2REGS.rdi]
1409	push qword [rbx + BS2REGS.rsi]
1410	push qword [rbx + BS2REGS.rdx]
1411	; line break
1412	push qword [rbx + BS2REGS.rcx]
1413	push qword [rbx + BS2REGS.rbx]
1414	push qword [rbx + BS2REGS.rax]
1415	; line break
1416	mov eax, [rbx + BS2REGS.cr8]
1417	push rax
1418	mov eax, [rbx + BS2REGS.cr4]
1419	push rax
1420	mov eax, [rbx + BS2REGS.cr3]
1421	push rax
1422	mov eax, [rbx + BS2REGS.cr0]
1423	push rax
1424	; line break
1425	push qword [rbp + 10h]
1426	push qword [rbx + BS2REGS.cr2]
1427	push qword [rbx + BS2REGS.rip]
1428	movzx eax, word [rbp + BS2REGS.ss]
1429	push rax
1430	movzx eax, byte [rbp + 08h]
1431	push rax
1432	push .s_szPanicMsg
1433	call NAME(TestFailedF_p64)
1434
1435	call Bs2Panic
1436	jmp .panic ; paranoia
1437
1438	.s_szPanicMsg:
1439	db 'trap #%RX8 at %RX16:%RX64 cr2=%RX64 err=%RX64', 13, 10
1440	db 'cr0=%RX64 cr3=%RX64 cr4=%RX64 cr8=%RX16', 13, 10
1441	db 'rax=%RX64 rbx=%RX64 rcx=%RX64', 13, 10
1442	db 'rdx=%RX64 rsi=%RX64 rdi=%RX64', 13, 10
1443	db 'r8 =%RX64 r9 =%RX64 r10=%RX64', 13, 10
1444	db 'r11=%RX64 r12=%RX64 r13=%RX64', 13, 10
1445	db 'r14=%RX64 r15=%RX64 rfl=%RX64', 13, 10
1446	db 'rip=%RX64 rsp=%RX64 rbp=%RX64 ', 13, 10
1447	db 'cs=%RX16 ds=%RX16 es=%RX16 fs=%RX16 gs=%RX16 ss=%RX16', 13, 10
1448	db 0
1449	.s_szWrongTrap:
1450	db 'Expected trap %RX8 got %RX8', 13, 10, 0
1451	.s_szWrongErrCd:
1452	db 'Expected errcd %RX16 got %RX16', 13, 10, 0
1453	ENDPROC bs2Trap_XX_64bit
1454
1455
1456	;;
1457	; Service IRQ handler.
1458	;
1459	; Takes requests in eax and later maybe parameters in other registers.
1460	;
1461	; return SS rbp + 28h
1462	; return RSP rbp + 20h
1463	; return RFLAGS rbp + 18h
1464	; return CS rbp + 10h
1465	; return RIP rbp + 08h
1466	BEGINCODELOW
1467	BEGINPROC bs2TrapService64bit
1468	jmp .highsegment
1469	BEGINCODEHIGH
1470	.highsegment:
1471	push rbp
1472	mov rbp, rsp
1473	push rax
1474	push rdx
1475	push rcx
1476
1477
1478	;
1479	; Switch (eax).
1480	;
1481	cmp eax, BS2_SYSCALL_TO_RING3
1482	jbe .to_ringX
1483
1484	; Unknown request.
1485	mov rax, -1
1486	.return:
1487	pop rcx
1488	pop rdx
1489	;pop rax
1490	leave
1491	iretq
1492
1493	;
1494	; Switching to the ring specified by eax.
1495	;
1496	.to_ringX:
1497	sub eax, BS2_SYSCALL_TO_RING0 ; al = new ring number.
1498
1499	mov dx, ds
1500	call bs2SRegToRing
1501	mov ds, dx
1502
1503	mov dx, es
1504	call bs2SRegToRing
1505	mov es, dx
1506
1507	mov dx, fs
1508	call bs2SRegToRing
1509	mov fs, dx
1510
1511	mov dx, gs
1512	call bs2SRegToRing
1513	mov gs, dx
1514
1515	mov dx, [rbp + 10h] ; cs
1516	call bs2SRegToRing
1517	mov [rbp + 10h], dx
1518
1519	mov dx, [rbp + 28h] ; ss
1520	call bs2SRegToRing
1521	mov [rbp + 28h], dx
1522
1523	or dword [ebp + 18h], X86_EFL_IOPL ; set IOPL=3
1524
1525	jmp .done_success
1526
1527	.done_success:
1528	xor eax, eax
1529	jmp .return
1530
1531	ENDPROC bs2TrapService64bit
1532
1533	%endif ; BS2_INC_CMN_LM
1534
1535
1536	;;
1537	; Converts a segment value (dx) to the ring specified by al.
1538	;
1539	; If the selector isn't a known CS, DS or SS selector it will be set to null.
1540	;
1541	; @returns dx
1542	; @param al The desired ring.
1543	; @param dx The segment to convert.
1544	;
1545	; @remarks WARNING! This has to work exactly the same both in 32-bit and 64-bit mode.
1546	;
1547	BEGINCODEHIGH
1548	BITS 32
1549	BEGINPROC bs2SRegToRing
1550	;
1551	; Classify the incoming selector.
1552	;
1553	cmp dx, BS2_SEL_R0_BASE
1554	jb .null
1555	cmp dx, BS2_SEL_R0_BASE + BS2_SEL_GRP_SIZE
1556	jb .ring0
1557
1558	cmp dx, BS2_SEL_R1_BASE
1559	jb .miss
1560	cmp dx, BS2_SEL_R1_BASE + BS2_SEL_GRP_SIZE
1561	jb .ring1
1562
1563	cmp dx, BS2_SEL_R2_BASE
1564	jb .miss
1565	cmp dx, BS2_SEL_R2_BASE + BS2_SEL_GRP_SIZE
1566	jb .ring2
1567
1568	cmp dx, BS2_SEL_R3_BASE
1569	jb .miss
1570	cmp dx, BS2_SEL_R3_BASE + BS2_SEL_GRP_SIZE
1571	jb .ring3
1572	jmp .miss
1573
1574	;
1575	; Convert the incoming selector to ring-0 and then from ring-0 to the
1576	; desired one.
1577	;
1578	.ring0:
1579	cmp al, 0
1580	je .done
1581
1582	add dx, BS2_SEL_R1_BASE - BS2_SEL_R0_BASE
1583	cmp al, 1
1584	je .done
1585
1586	add dx, BS2_SEL_R2_BASE - BS2_SEL_R1_BASE
1587	cmp al, 2
1588	je .done
1589
1590	add dx, BS2_SEL_R3_BASE - BS2_SEL_R2_BASE
1591	cmp al, 3
1592	je .done
1593	.panic:
1594	hlt
1595	jmp .panic
1596
1597	.ring1:
1598	sub dx, BS2_SEL_R1_BASE - BS2_SEL_R0_BASE
1599	jmp .ring0
1600	.ring2:
1601	sub dx, BS2_SEL_R2_BASE - BS2_SEL_R0_BASE
1602	jmp .ring0
1603	.ring3:
1604	sub dx, BS2_SEL_R3_BASE - BS2_SEL_R0_BASE
1605	jmp .ring0
1606
1607	.done:
1608	and dl, ~3h
1609	or dl, al ; set the RPL
1610	ret
1611
1612	.miss:
1613	.null:
1614	xor dx, dx
1615	ret
1616	ENDPROC bs2SRegToRing
1617
1618	BEGINCODELOW
1619

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