ReactOS  0.4.14-dev-384-g5b37caa
winldr.c
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1 /*
2  * PROJECT: EFI Windows Loader
3  * LICENSE: GPL - See COPYING in the top level directory
4  * FILE: boot/freeldr/freeldr/arch/i386/winldr.c
5  * PURPOSE: Memory related routines
6  * PROGRAMMERS: Aleksey Bragin (aleksey@reactos.org)
7  */
8 
9 /* INCLUDES ******************************************************************/
10 
11 #include <freeldr.h>
12 #include <ndk/asm.h>
13 #include "../../winldr.h"
14 
15 #include <debug.h>
16 DBG_DEFAULT_CHANNEL(WINDOWS);
17 
18 // This is needed because headers define wrong one for ReactOS
19 #undef KIP0PCRADDRESS
20 #define KIP0PCRADDRESS 0xffdff000
21 
22 #define SELFMAP_ENTRY 0x300
23 
24 // This is needed only for SetProcessorContext routine
25 #pragma pack(2)
26 typedef struct
27 {
30 } GDTIDT;
31 #pragma pack(4)
32 
33 /*
34  * Consider adding these definitions into
35  * ntoskrnl/include/internal/i386/intrin_i.h and/or the NDK.
36  */
37 
38 #define DPL_SYSTEM 0
39 #define DPL_USER 3
40 
41 #define TYPE_TSS16A 0x01 // 16-bit Task State Segment (Available)
42 #define TYPE_LDT 0x02 // Local Descriptor Table
43 #define TYPE_TSS16B 0x03 // 16-bit Task State Segment (Busy)
44 #define TYPE_CALL16 0x04 // 16-bit Call Gate
45 #define TYPE_TASK 0x05 // Task Gate (I386_TASK_GATE)
46 #define TYPE_INT16 0x06 // 16-bit Interrupt Gate
47 #define TYPE_TRAP16 0x07 // 16-bit Trap Gate
48 // #define TYPE_RESERVED_1 0x08
49 #define TYPE_TSS32A 0x09 // 32-bit Task State Segment (Available) (I386_TSS)
50 // #define TYPE_RESERVED_2 0x0A
51 #define TYPE_TSS32B 0x0B // 32-bit Task State Segment (Busy) (I386_ACTIVE_TSS)
52 #define TYPE_CALL32 0x0C // 32-bit Call Gate (I386_CALL_GATE)
53 // #define TYPE_RESERVED_3 0x0D
54 #define TYPE_INT32 0x0E // 32-bit Interrupt Gate (I386_INTERRUPT_GATE)
55 #define TYPE_TRAP32 0x0F // 32-bit Trap Gate (I386_TRAP_GATE)
56 
57 #define DESCRIPTOR_ACCESSED 0x1
58 #define DESCRIPTOR_READ_WRITE 0x2
59 #define DESCRIPTOR_EXECUTE_READ 0x2
60 #define DESCRIPTOR_EXPAND_DOWN 0x4
61 #define DESCRIPTOR_CONFORMING 0x4
62 #define DESCRIPTOR_CODE 0x8
63 
64 #define TYPE_CODE (0x10 | DESCRIPTOR_CODE | DESCRIPTOR_EXECUTE_READ)
65 #define TYPE_DATA (0x10 | DESCRIPTOR_READ_WRITE)
66 
70  IN PVOID pGdt,
71  IN USHORT Selector)
72 {
73  return (PKGDTENTRY)((ULONG_PTR)pGdt + (Selector & ~RPL_MASK));
74 }
75 
77 VOID
80  IN ULONG32 Base)
81 {
82  Entry->BaseLow = (USHORT)(Base & 0xffff);
83  Entry->HighWord.Bytes.BaseMid = (UCHAR)((Base >> 16) & 0xff);
84  Entry->HighWord.Bytes.BaseHi = (UCHAR)((Base >> 24) & 0xff);
85  // Entry->BaseUpper = (ULONG)(Base >> 32);
86 }
87 
89 VOID
92  IN ULONG Limit)
93 {
94  if (Limit < 0x100000)
95  {
96  Entry->HighWord.Bits.Granularity = 0;
97  }
98  else
99  {
100  Limit >>= 12;
101  Entry->HighWord.Bits.Granularity = 1;
102  }
103  Entry->LimitLow = (USHORT)(Limit & 0xffff);
104  Entry->HighWord.Bits.LimitHi = ((Limit >> 16) & 0x0f);
105 }
106 
107 VOID
110  IN ULONG32 Base,
111  IN ULONG Limit,
112  IN UCHAR Type,
113  IN UCHAR Dpl,
114  IN BOOLEAN Granularity,
115  IN UCHAR SegMode) // 0: 16-bit, 1: 32-bit, 2: 64-bit
116 {
119  Entry->HighWord.Bits.Type = (Type & 0x1f);
120  Entry->HighWord.Bits.Dpl = (Dpl & 0x3);
121  Entry->HighWord.Bits.Pres = (Type != 0); // Present, must be 1 when the GDT entry is valid.
122  Entry->HighWord.Bits.Sys = 0; // System
123  Entry->HighWord.Bits.Reserved_0 = 0; // LongMode = !!(SegMode & 1);
124  Entry->HighWord.Bits.Default_Big = !!(SegMode & 2);
125  Entry->HighWord.Bits.Granularity |= !!Granularity; // The flag may have been already set by KiSetGdtDescriptorLimit().
126  // Entry->MustBeZero = 0;
127 }
128 
130 VOID
133  IN ULONG32 Base,
134  IN ULONG Limit,
135  IN UCHAR Type,
136  IN UCHAR Dpl,
137  IN UCHAR SegMode) // 0: 16-bit, 1: 32-bit, 2: 64-bit
138 {
139  KiSetGdtEntryEx(Entry, Base, Limit, Type, Dpl, FALSE, SegMode);
140 }
141 
142 #if 0
143 VOID
144 DumpGDTEntry(ULONG_PTR Base, ULONG Selector)
145 {
146  PKGDTENTRY pGdt = (PKGDTENTRY)((ULONG_PTR)Base + Selector);
147 
148  TRACE("\n"
149  "Selector 0x%04x\n"
150  "===============\n"
151  "LimitLow = 0x%04x\n"
152  "BaseLow = 0x%04x\n"
153  "HighWord.Bytes.BaseMid = 0x%02x\n"
154  "HighWord.Bytes.Flags1 = 0x%02x\n"
155  "HighWord.Bytes.Flags2 = 0x%02x\n"
156  "HighWord.Bytes.BaseHi = 0x%02x\n"
157  "\n",
158  Selector,
159  pGdt->LimitLow, pGdt->BaseLow,
160  pGdt->HighWord.Bytes.BaseMid,
161  pGdt->HighWord.Bytes.Flags1,
162  pGdt->HighWord.Bytes.Flags2,
163  pGdt->HighWord.Bytes.BaseHi);
164 }
165 #endif
166 
167 /* GLOBALS *******************************************************************/
168 
171 
176 
180 
181 /* FUNCTIONS *****************************************************************/
182 
183 static
184 BOOLEAN
186 {
187  ULONG NumPageTables, TotalSize;
188  PUCHAR Buffer;
189  // It's better to allocate PDE + PTEs contiguous
190 
191  // Max number of entries = MaxPageNum >> 10
192  // FIXME: This is a number to describe ALL physical memory
193  // and windows doesn't expect ALL memory mapped...
194  NumPageTables = TotalPagesInLookupTable >> 10;
195 
196  TRACE("NumPageTables = %d\n", NumPageTables);
197 
198  // Allocate memory block for all these things:
199  // PDE, HAL mapping page table, physical mapping, kernel mapping
200  TotalSize = (1 + 1 + NumPageTables * 2) * MM_PAGE_SIZE;
201 
202  // PDE+HAL+KernelPTEs == MemoryData
204 
205  // Physical PTEs = FirmwareTemporary
206  PhysicalPageTablesBuffer = (PUCHAR)Buffer + TotalSize - NumPageTables*MM_PAGE_SIZE;
208  NumPageTables*MM_PAGE_SIZE,
210 
211  // This check is now redundant
212  if (Buffer + (TotalSize - NumPageTables*MM_PAGE_SIZE) !=
214  {
215  TRACE("There was a problem allocating two adjacent blocks of memory!");
216  }
217 
219  {
220  UiMessageBox("Impossible to allocate memory block for page tables!");
221  return FALSE;
222  }
223 
224  // Zero all this memory block
225  RtlZeroMemory(Buffer, TotalSize);
226 
227  // Set up pointers correctly now
229 
230  // Map the page directory at 0xC0000000 (maps itself)
231  PDE[SELFMAP_ENTRY].PageFrameNumber = (ULONG)PDE >> MM_PAGE_SHIFT;
232  PDE[SELFMAP_ENTRY].Valid = 1;
233  PDE[SELFMAP_ENTRY].Write = 1;
234 
235  // The last PDE slot is allocated for HAL's memory mapping (Virtual Addresses 0xFFC00000 - 0xFFFFFFFF)
236  HalPageTable = (PHARDWARE_PTE)&Buffer[MM_PAGE_SIZE*1];
237 
238  // Map it
239  PDE[1023].PageFrameNumber = (ULONG)HalPageTable >> MM_PAGE_SHIFT;
240  PDE[1023].Valid = 1;
241  PDE[1023].Write = 1;
242 
243  // Store pointer to the table for easier access
244  KernelPageTablesBuffer = &Buffer[MM_PAGE_SIZE*2];
245 
246  // Zero counters of page tables used
247  PhysicalPageTables = 0;
248  KernelPageTables = 0;
249 
250  return TRUE;
251 }
252 
253 static
254 VOID
256 {
257  //Print(L"Creating PDE Entry %X\n", Entry);
258 
259  // Identity mapping
260  *PhysicalPT = (PHARDWARE_PTE)&PhysicalPageTablesBuffer[PhysicalPageTables*MM_PAGE_SIZE];
262 
263  PDE[Entry].PageFrameNumber = (ULONG)*PhysicalPT >> MM_PAGE_SHIFT;
264  PDE[Entry].Valid = 1;
265  PDE[Entry].Write = 1;
266 
267  if (Entry+(KSEG0_BASE >> 22) > 1023)
268  {
269  TRACE("WARNING! Entry: %X > 1023\n", Entry+(KSEG0_BASE >> 22));
270  }
271 
272  // Kernel-mode mapping
273  *KernelPT = (PHARDWARE_PTE)&KernelPageTablesBuffer[KernelPageTables*MM_PAGE_SIZE];
275 
276  PDE[Entry+(KSEG0_BASE >> 22)].PageFrameNumber = ((ULONG)*KernelPT >> MM_PAGE_SHIFT);
277  PDE[Entry+(KSEG0_BASE >> 22)].Valid = 1;
278  PDE[Entry+(KSEG0_BASE >> 22)].Write = 1;
279 }
280 
281 BOOLEAN
283  IN PFN_COUNT NumberOfPages,
284  IN BOOLEAN KernelMapping)
285 {
286  PHARDWARE_PTE PhysicalPT;
287  PHARDWARE_PTE KernelPT;
288  PFN_COUNT Entry, Page;
289 
290  TRACE("MempSetupPaging: SP 0x%X, Number: 0x%X, Kernel: %s\n",
291  StartPage, NumberOfPages, KernelMapping ? "yes" : "no");
292 
293  // HACK
294  if (StartPage+NumberOfPages >= 0x80000)
295  {
296  //
297  // We cannot map this as it requires more than 1 PDE
298  // and in fact it's not possible at all ;)
299  //
300  //Print(L"skipping...\n");
301  return TRUE;
302  }
303 
304  //
305  // Now actually set up the page tables for identity mapping
306  //
307  for (Page = StartPage; Page < StartPage + NumberOfPages; Page++)
308  {
309  Entry = Page >> 10;
310 
311  if (((PULONG)PDE)[Entry] == 0)
312  {
313  MempAllocatePTE(Entry, &PhysicalPT, &KernelPT);
314  }
315  else
316  {
317  PhysicalPT = (PHARDWARE_PTE)(PDE[Entry].PageFrameNumber << MM_PAGE_SHIFT);
318  KernelPT = (PHARDWARE_PTE)(PDE[Entry+(KSEG0_BASE >> 22)].PageFrameNumber << MM_PAGE_SHIFT);
319  }
320 
321  PhysicalPT[Page & 0x3ff].PageFrameNumber = Page;
322  PhysicalPT[Page & 0x3ff].Valid = (Page != 0);
323  PhysicalPT[Page & 0x3ff].Write = (Page != 0);
324 
325  if (KernelMapping)
326  {
327  if (KernelPT[Page & 0x3ff].Valid) WARN("xxx already mapped \n");
328  KernelPT[Page & 0x3ff].PageFrameNumber = Page;
329  KernelPT[Page & 0x3ff].Valid = (Page != 0);
330  KernelPT[Page & 0x3ff].Write = (Page != 0);
331  }
332  }
333 
334  return TRUE;
335 }
336 
337 VOID
339 {
340  PHARDWARE_PTE KernelPT;
341  PFN_NUMBER Entry = (Page >> 10) + (KSEG0_BASE >> 22);
342 
343  /* Don't unmap page directory or HAL entries */
344  if (Entry == SELFMAP_ENTRY || Entry == 1023)
345  return;
346 
347  if (PDE[Entry].Valid)
348  {
349  KernelPT = (PHARDWARE_PTE)(PDE[Entry].PageFrameNumber << MM_PAGE_SHIFT);
350 
351  if (KernelPT)
352  {
353  KernelPT[Page & 0x3ff].PageFrameNumber = 0;
354  KernelPT[Page & 0x3ff].Valid = 0;
355  KernelPT[Page & 0x3ff].Write = 0;
356  }
357  }
358 }
359 
360 static
361 VOID
363 {
364  BOOLEAN LocalAPIC;
365  LARGE_INTEGER MsrValue;
366  ULONG APICAddress, CpuInfo[4];
367 
368  /* Check if we have a local APIC */
369  __cpuid((int*)CpuInfo, 1);
370  LocalAPIC = (((CpuInfo[3] >> 9) & 1) != 0);
371 
372  /* If there is no APIC, just return */
373  if (!LocalAPIC)
374  return;
375 
376  /* Read the APIC Address */
377  MsrValue.QuadPart = __readmsr(0x1B);
378  APICAddress = (MsrValue.LowPart & 0xFFFFF000);
379 
380  TRACE("Local APIC detected at address 0x%x\n",
381  APICAddress);
382 
383  /* Map it */
384  HalPageTable[(APIC_BASE - 0xFFC00000) >> MM_PAGE_SHIFT].PageFrameNumber
385  = APICAddress >> MM_PAGE_SHIFT;
386  HalPageTable[(APIC_BASE - 0xFFC00000) >> MM_PAGE_SHIFT].Valid = 1;
387  HalPageTable[(APIC_BASE - 0xFFC00000) >> MM_PAGE_SHIFT].Write = 1;
388  HalPageTable[(APIC_BASE - 0xFFC00000) >> MM_PAGE_SHIFT].WriteThrough = 1;
389  HalPageTable[(APIC_BASE - 0xFFC00000) >> MM_PAGE_SHIFT].CacheDisable = 1;
390 }
391 
392 static
393 BOOLEAN
395 {
396  TRACE("HalPageTable: 0x%X\n", HalPageTable);
397 
398  /*
399  * The Page Tables have been setup, make special handling
400  * for the boot processor PCR and KI_USER_SHARED_DATA.
401  */
402  HalPageTable[(KI_USER_SHARED_DATA - 0xFFC00000) >> MM_PAGE_SHIFT].PageFrameNumber = PcrBasePage+1;
403  HalPageTable[(KI_USER_SHARED_DATA - 0xFFC00000) >> MM_PAGE_SHIFT].Valid = 1;
404  HalPageTable[(KI_USER_SHARED_DATA - 0xFFC00000) >> MM_PAGE_SHIFT].Write = 1;
405 
406  HalPageTable[(KIP0PCRADDRESS - 0xFFC00000) >> MM_PAGE_SHIFT].PageFrameNumber = PcrBasePage;
407  HalPageTable[(KIP0PCRADDRESS - 0xFFC00000) >> MM_PAGE_SHIFT].Valid = 1;
408  HalPageTable[(KIP0PCRADDRESS - 0xFFC00000) >> MM_PAGE_SHIFT].Write = 1;
409 
410  /* Map APIC */
411  WinLdrpMapApic();
412 
413  /* Map VGA memory */
414  //VideoMemoryBase = MmMapIoSpace(0xb8000, 4000, MmNonCached);
415  //TRACE("VideoMemoryBase: 0x%X\n", VideoMemoryBase);
416 
417  return TRUE;
418 }
419 
420 #define ExtendedBIOSDataArea ((PULONG)0x740)
421 #define ExtendedBIOSDataSize ((PULONG)0x744)
422 #define RomFontPointers ((PULONG)0x700)
423 
424 static
426 {
427  /* Get the address of the BIOS ROM fonts. Win 2003 videoprt reads these
428  values from address 0x700 .. 0x718 and store them in the registry
429  in HKLM\System\CurrentControlSet\Control\Wow\RomFontPointers */
431 
432  /* Store address of the extended BIOS data area in 0x740 */
434 
435  if (*ExtendedBIOSDataArea == 0 && *ExtendedBIOSDataSize == 0)
436  {
437  WARN("Couldn't get address of extended BIOS data area\n");
438  }
439  else
440  {
441  TRACE("*ExtendedBIOSDataArea = 0x%lx\n", *ExtendedBIOSDataArea);
442  }
443 }
444 
446 {
447  ULONG TssSize;
448  //ULONG TssPages;
449  ULONG_PTR Pcr = 0;
450  ULONG_PTR Tss = 0;
451  ULONG BlockSize, NumPages;
452 
453  LoaderBlock->u.I386.CommonDataArea = NULL; // Force No ABIOS support
454  LoaderBlock->u.I386.MachineType = MACHINE_TYPE_ISA;
455 
456  /* Allocate 2 pages for PCR: one for the boot processor PCR and one for KI_USER_SHARED_DATA */
457  Pcr = (ULONG_PTR)MmAllocateMemoryWithType(2 * MM_PAGE_SIZE, LoaderStartupPcrPage);
458  PcrBasePage = Pcr >> MM_PAGE_SHIFT;
459  if (Pcr == 0)
460  {
461  UiMessageBox("Could not allocate PCR.");
462  return;
463  }
464 
465  /* Allocate TSS */
466  TssSize = (sizeof(KTSS) + MM_PAGE_SIZE) & ~(MM_PAGE_SIZE - 1);
467  //TssPages = TssSize / MM_PAGE_SIZE;
468 
470  TssBasePage = Tss >> MM_PAGE_SHIFT;
471  if (Tss == 0)
472  {
473  UiMessageBox("Could not allocate TSS.");
474  return;
475  }
476 
477  /* Allocate space for new GDT + IDT */
478  BlockSize = NUM_GDT*sizeof(KGDTENTRY) + NUM_IDT*sizeof(KIDTENTRY);//FIXME: Use GDT/IDT limits here?
479  NumPages = (BlockSize + MM_PAGE_SIZE - 1) >> MM_PAGE_SHIFT;
480  GdtIdt = (PKGDTENTRY)MmAllocateMemoryWithType(NumPages * MM_PAGE_SIZE, LoaderMemoryData);
481  if (GdtIdt == NULL)
482  {
483  UiMessageBox("Could not allocate pages for GDT+IDT!");
484  return;
485  }
486 
487  /* Zero newly prepared GDT+IDT */
488  RtlZeroMemory(GdtIdt, NumPages << MM_PAGE_SHIFT);
489 
490  // Before we start mapping pages, create a block of memory, which will contain
491  // PDE and PTEs
492  if (MempAllocatePageTables() == FALSE)
493  {
494  BugCheck("MempAllocatePageTables failed!\n");
495  }
496 
497  /* Map stuff like PCR, KI_USER_SHARED_DATA and Apic */
499 
500  /* Set some special fields */
502 }
503 
504 
505 VOID
507 {
508  GDTIDT GdtDesc, IdtDesc, OldIdt;
509  PKGDTENTRY pGdt;
510  PKIDTENTRY pIdt;
511  USHORT Ldt = 0;
512  ULONG Pcr;
513  ULONG Tss;
514  //ULONG i;
515 
516  Pcr = KIP0PCRADDRESS;
517  Tss = KSEG0_BASE | (TssBasePage << MM_PAGE_SHIFT);
518 
519  TRACE("GdtIdt %p, Pcr %p, Tss 0x%08x\n",
520  GdtIdt, Pcr, Tss);
521 
522  /* Enable paging */
523  //BS->ExitBootServices(ImageHandle,MapKey);
524 
525  /* Disable Interrupts */
526  _disable();
527 
528  /* Re-initialize EFLAGS */
529  __writeeflags(0);
530 
531  /* Set the PDBR */
533 
534  /* Enable paging by modifying CR0 */
536 
537  /* The Kernel expects the boot processor PCR to be zero-filled on startup */
538  RtlZeroMemory((PVOID)Pcr, MM_PAGE_SIZE);
539 
540  /* Get old values of GDT and IDT */
541  Ke386GetGlobalDescriptorTable(&GdtDesc);
542  __sidt(&IdtDesc);
543 
544  /* Save old IDT */
545  OldIdt.Base = IdtDesc.Base;
546  OldIdt.Limit = IdtDesc.Limit;
547 
548  /* Prepare new IDT+GDT */
549  GdtDesc.Base = KSEG0_BASE | (ULONG_PTR)GdtIdt;
550  GdtDesc.Limit = NUM_GDT * sizeof(KGDTENTRY) - 1;
551  IdtDesc.Base = (ULONG)((PUCHAR)GdtDesc.Base + GdtDesc.Limit + 1);
552  IdtDesc.Limit = NUM_IDT * sizeof(KIDTENTRY) - 1;
553 
554  // ========================
555  // Fill all descriptors now
556  // ========================
557 
558  pGdt = (PKGDTENTRY)GdtDesc.Base;
559  pIdt = (PKIDTENTRY)IdtDesc.Base;
560 
561  /* KGDT_NULL (0x00) Null Selector - Unused */
562  KiSetGdtEntry(KiGetGdtEntry(pGdt, KGDT_NULL), 0x0000, 0, 0, DPL_SYSTEM, 0);
563  // DumpGDTEntry(GdtDesc.Base, KGDT_NULL);
564 
565  /* KGDT_R0_CODE (0x08) Ring 0 Code selector - Flat 4Gb */
566  KiSetGdtEntry(KiGetGdtEntry(pGdt, KGDT_R0_CODE), 0x0000, 0xFFFFFFFF,
567  TYPE_CODE, DPL_SYSTEM, 2);
568  // DumpGDTEntry(GdtDesc.Base, KGDT_R0_CODE);
569 
570  /* KGDT_R0_DATA (0x10) Ring 0 Data selector - Flat 4Gb */
571  KiSetGdtEntry(KiGetGdtEntry(pGdt, KGDT_R0_DATA), 0x0000, 0xFFFFFFFF,
572  TYPE_DATA, DPL_SYSTEM, 2);
573  // DumpGDTEntry(GdtDesc.Base, KGDT_R0_DATA);
574 
575  /* KGDT_R3_CODE (0x18) Ring 3 Code Selector - Flat 2Gb */
576  KiSetGdtEntry(KiGetGdtEntry(pGdt, KGDT_R3_CODE), 0x0000, 0xFFFFFFFF,
577  TYPE_CODE, DPL_USER, 2);
578  // DumpGDTEntry(GdtDesc.Base, KGDT_R3_CODE);
579 
580  /* KGDT_R3_DATA (0x20) Ring 3 Data Selector - Flat 2Gb */
581  KiSetGdtEntry(KiGetGdtEntry(pGdt, KGDT_R3_DATA), 0x0000, 0xFFFFFFFF,
582  TYPE_DATA, DPL_USER, 2);
583  // DumpGDTEntry(GdtDesc.Base, KGDT_R3_DATA);
584 
585  /* KGDT_TSS (0x28) TSS Selector (Ring 0) */
587  0x78-1 /* FIXME: Check this; would be sizeof(KTSS)-1 */,
588  TYPE_TSS32A, DPL_SYSTEM, 0);
589  // DumpGDTEntry(GdtDesc.Base, KGDT_TSS);
590 
591  /*
592  * KGDT_R0_PCR (0x30) PCR Selector (Ring 0)
593  *
594  * IMPORTANT COMPATIBILITY NOTE:
595  * Windows <= Server 2003 sets a Base == KIP0PCRADDRESS (0xffdff000 on x86)
596  * with a Limit of 1 page (LimitLow == 1, Granularity == 1, that is interpreted
597  * as a "Limit" == 0x1fff but is incorrect, of course).
598  * On Windows Longhorn/Vista+ however, the Base is not hardcoded to KIP0PCRADDRESS
599  * and the limit is set in bytes (Granularity == 0):
600  * Longhorn/Vista reports LimitLow == 0x0fff == MM_PAGE_SIZE - 1, whereas
601  * Windows 7+ uses larger sizes there (not aligned on a page boundary).
602  */
603 #if 1
604  /* Server 2003 way */
606  TYPE_DATA, DPL_SYSTEM, TRUE, 2);
607 #else
608  /* Vista+ way */
609  KiSetGdtEntry(KiGetGdtEntry(pGdt, KGDT_R0_PCR), (ULONG32)Pcr, MM_PAGE_SIZE - 1,
610  TYPE_DATA, DPL_SYSTEM, 2);
611 #endif
612  // DumpGDTEntry(GdtDesc.Base, KGDT_R0_PCR);
613 
614  /* KGDT_R3_TEB (0x38) Thread Environment Block Selector (Ring 3) */
615  KiSetGdtEntry(KiGetGdtEntry(pGdt, KGDT_R3_TEB), 0x0000, 0x0FFF,
617  // DumpGDTEntry(GdtDesc.Base, KGDT_R3_TEB);
618 
619  /* KGDT_VDM_TILE (0x40) VDM BIOS Data Area Selector (Ring 3) */
620  KiSetGdtEntry(KiGetGdtEntry(pGdt, KGDT_VDM_TILE), 0x0400, 0xFFFF,
621  TYPE_DATA, DPL_USER, 0);
622  // DumpGDTEntry(GdtDesc.Base, KGDT_VDM_TILE);
623 
624  /* KGDT_LDT (0x48) LDT Selector (Reserved) */
625  KiSetGdtEntry(KiGetGdtEntry(pGdt, KGDT_LDT), 0x0000, 0, 0, DPL_SYSTEM, 0);
626  // DumpGDTEntry(GdtDesc.Base, KGDT_LDT);
627 
628  /* KGDT_DF_TSS (0x50) Double-Fault Task Switch Selector (Ring 0) */
629  KiSetGdtEntry(KiGetGdtEntry(pGdt, KGDT_DF_TSS), 0x20000 /* FIXME: Not correct! */,
630  0xFFFF /* FIXME: Not correct! */,
631  TYPE_TSS32A, DPL_SYSTEM, 0);
632  // DumpGDTEntry(GdtDesc.Base, KGDT_DF_TSS);
633 
634  /* KGDT_NMI_TSS (0x58) NMI Task Switch Selector (Ring 0) */
635  KiSetGdtEntry(KiGetGdtEntry(pGdt, KGDT_NMI_TSS), 0x20000, 0xFFFF,
636  TYPE_CODE, DPL_SYSTEM, 0);
637  // DumpGDTEntry(GdtDesc.Base, KGDT_NMI_TSS);
638 
639  /* Selector (0x60) - Unused (Reserved) on Windows Longhorn/Vista+ */
640  KiSetGdtEntry(KiGetGdtEntry(pGdt, 0x60), 0x20000 /* FIXME: Maybe not correct, but noone cares */,
641  0xFFFF, TYPE_DATA, DPL_SYSTEM, 0);
642  // DumpGDTEntry(GdtDesc.Base, 0x60);
643 
644  /* Video Display Buffer Selector (0x68) - Unused (Reserved) on Windows Longhorn/Vista+ */
645  KiSetGdtEntry(KiGetGdtEntry(pGdt, 0x68), 0xB8000, 0x3FFF,
646  TYPE_DATA, DPL_SYSTEM, 0);
647  // DumpGDTEntry(GdtDesc.Base, 0x68);
648 
649  /*
650  * GDT Alias Selector (points to GDT) (0x70)
651  *
652  * IMPORTANT COMPATIBILITY NOTE:
653  * The Base is not fixed to 0xFFFF7000 on Windows Longhorn/Vista+.
654  */
655  KiSetGdtEntry(KiGetGdtEntry(pGdt, 0x70), 0xFFFF7000 /* GdtDesc.Base ?? */, GdtDesc.Limit,
656  TYPE_DATA, DPL_SYSTEM, 0);
657  // DumpGDTEntry(GdtDesc.Base, 0x70);
658 
659  /*
660  * Windows <= Server 2003 defines three additional unused but valid
661  * descriptors there, possibly for debugging purposes only.
662  * They are not present on Windows Longhorn/Vista+.
663  */
664  // KiSetGdtEntry(KiGetGdtEntry(pGdt, 0x78), 0x80400000, 0xffff, TYPE_CODE, DPL_SYSTEM, 0);
665  // KiSetGdtEntry(KiGetGdtEntry(pGdt, 0x80), 0x80400000, 0xffff, TYPE_DATA, DPL_SYSTEM, 0);
666  // KiSetGdtEntry(KiGetGdtEntry(pGdt, 0x88), 0x0000, 0, TYPE_DATA, DPL_SYSTEM, 0);
667 
668  /* Copy the old IDT */
669  RtlCopyMemory(pIdt, (PVOID)OldIdt.Base, OldIdt.Limit + 1);
670 
671  /* Mask interrupts */
672  //asm("cli\n"); // they are already masked before enabling paged mode
673 
674  /* Load GDT+IDT */
675  Ke386SetGlobalDescriptorTable(&GdtDesc);
676  __lidt(&IdtDesc);
677 
678  /* Jump to proper CS and clear prefetch queue */
679 #if defined(__GNUC__)
680  asm("ljmp $0x08, $1f\n"
681  "1:\n");
682 #elif defined(_MSC_VER)
683  /* We cannot express the above in MASM so we use this far return instead */
684  __asm
685  {
686  push 8
687  push offset resume
688  retf
689  resume:
690  };
691 #else
692 #error
693 #endif
694 
695  /* Set SS selector */
696  Ke386SetSs(KGDT_R0_DATA);
697 
698  /* Set DS and ES selectors */
699  Ke386SetDs(KGDT_R0_DATA);
700  Ke386SetEs(KGDT_R0_DATA); // This is vital for rep stosd
701 
702  /* LDT = not used ever, thus set to 0 */
703  Ke386SetLocalDescriptorTable(Ldt);
704 
705  /* Load TSR */
706  Ke386SetTr(KGDT_TSS);
707 
708  /* Clear GS */
709  Ke386SetGs(0);
710 
711  /* Set FS to PCR */
712  Ke386SetFs(KGDT_R0_PCR);
713 
714  // Real end of the function, just for information
715  /* do not uncomment!
716  pop edi;
717  pop esi;
718  pop ebx;
719  mov esp, ebp;
720  pop ebp;
721  ret
722  */
723 }
724 
725 #if DBG
726 VOID
727 MempDump(VOID)
728 {
729  PULONG PDE_Addr=(PULONG)PDE;//0xC0300000;
730  int i, j;
731 
732  TRACE("\nPDE\n");
733 
734  for (i=0; i<128; i++)
735  {
736  TRACE("0x%04X | ", i*8);
737 
738  for (j=0; j<8; j++)
739  {
740  TRACE("0x%08X ", PDE_Addr[i*8+j]);
741  }
742 
743  TRACE("\n");
744  }
745 }
746 #endif
ULONG64 Valid
Definition: mmtypes.h:66
static VOID WinLdrpMapApic(VOID)
Definition: winldr.c:362
VOID MempDump(VOID)
Definition: winldr.c:429
struct _KGDTENTRY::@2351::@2352 Bytes
#define ExtendedBIOSDataSize
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#define IN
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#define MachGetExtendedBIOSData(ExtendedBIOSDataArea, ExtendedBIOSDataSize)
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#define TRUE
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NTSYSAPI VOID NTAPI RtlCopyMemory(VOID UNALIGNED *Destination, CONST VOID UNALIGNED *Source, ULONG Length)
#define TYPE_DATA
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unsigned int ULONG32
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PUCHAR KernelPageTablesBuffer
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#define PKGDTENTRY
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Type
Definition: Type.h:6
#define KTSS
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struct _Entry Entry
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#define KIP0PCRADDRESS
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ULONG PFN_COUNT
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USHORT BaseLow
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unsigned char * PUCHAR
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_In_ CLIPOBJ _In_ BRUSHOBJ _In_ LONG x1
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static void WinLdrSetupSpecialDataPointers(VOID)
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GLintptr offset
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_In_opt_ ULONG Base
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#define KGDT_R0_CODE
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__INTRIN_INLINE void __lidt(void *Source)
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PUCHAR PhysicalPageTablesBuffer
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BOOLEAN MempSetupPaging(IN PFN_NUMBER StartPage, IN PFN_NUMBER NumberOfPages, IN BOOLEAN KernelMapping)
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ULONG_PTR PcrBasePage
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static BOOL Write(PBYTE Address, PBYTE Data, SIZE_T Size)
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#define DPL_SYSTEM
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uint32_t ULONG_PTR
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int WINAPI StartPage(_In_ HDC)
#define KGDT_NULL
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#define KGDT_NMI_TSS
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__INTRIN_INLINE void __writecr3(unsigned int Data)
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GLsizei GLenum const GLvoid GLsizei GLenum GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLint GLint GLint GLshort GLshort GLshort GLubyte GLubyte GLubyte GLuint GLuint GLuint GLushort GLushort GLushort GLbyte GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLfloat GLint GLint GLint GLint GLshort GLshort GLshort GLshort GLubyte GLubyte GLubyte GLubyte GLuint GLuint GLuint GLuint GLushort GLushort GLushort GLushort GLboolean const GLdouble const GLfloat const GLint const GLshort const GLbyte const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLdouble const GLfloat const GLfloat const GLint const GLint const GLshort const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort GLenum GLenum GLenum GLfloat GLenum GLint GLenum GLenum GLenum GLfloat GLenum GLenum GLint GLenum GLfloat GLenum GLint GLint GLushort GLenum GLenum GLfloat GLenum GLenum GLint GLfloat const GLubyte GLenum GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLint GLint GLsizei GLsizei GLint GLenum GLenum const GLvoid GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLenum const GLdouble GLenum GLenum const GLfloat GLenum GLenum const GLint GLsizei GLuint GLfloat GLuint GLbitfield GLfloat GLint GLuint GLboolean GLenum GLfloat GLenum GLbitfield GLenum GLfloat GLfloat GLint GLint const GLfloat GLenum GLfloat GLfloat GLint GLint GLfloat GLfloat GLint GLint const GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat const GLdouble const GLfloat const GLdouble const GLfloat GLint i
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struct _HARDWARE_PTE * PHARDWARE_PTE
#define KSEG0_BASE
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__INTRIN_INLINE void __sidt(void *Destination)
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ULONG KernelPageTables
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I386_LOADER_BLOCK I386
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unsigned char BOOLEAN
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__INTRIN_INLINE void __writecr0(unsigned int Data)
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ULONG_PTR TssBasePage
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PFN_NUMBER TotalPagesInLookupTable
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GLsizei GLenum const GLvoid GLsizei GLenum GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLint GLint GLint GLshort GLshort GLshort GLubyte GLubyte GLubyte GLuint GLuint GLuint GLushort GLushort GLushort GLbyte GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLfloat GLint GLint GLint GLint GLshort GLshort GLshort GLshort GLubyte GLubyte GLubyte GLubyte GLuint GLuint GLuint GLuint GLushort GLushort GLushort GLushort GLboolean const GLdouble const GLfloat const GLint const GLshort const GLbyte const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLdouble const GLfloat const GLfloat const GLint const GLint const GLshort const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort GLenum GLenum GLenum GLfloat GLenum GLint GLenum GLenum GLenum GLfloat GLenum GLenum GLint GLenum GLfloat GLenum GLint GLint GLushort GLenum GLenum GLfloat GLenum GLenum GLint GLfloat const GLubyte GLenum GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLint GLint GLsizei GLsizei GLint GLenum GLenum const GLvoid GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLenum const GLdouble GLenum GLenum const GLfloat GLenum GLenum const GLint GLsizei GLuint GLfloat GLuint GLbitfield GLfloat GLint GLuint GLboolean GLenum GLfloat GLenum GLbitfield GLenum GLfloat GLfloat GLint GLint const GLfloat GLenum GLfloat GLfloat GLint GLint GLfloat GLfloat GLint GLint const GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat const GLdouble const GLfloat const GLdouble const GLfloat GLint GLint GLint j
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VOID KiSetGdtEntryEx(IN OUT PKGDTENTRY Entry, IN ULONG32 Base, IN ULONG Limit, IN UCHAR Type, IN UCHAR Dpl, IN BOOLEAN Granularity, IN UCHAR SegMode)
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Definition: winldr.c:90
FORCEINLINE VOID KiSetGdtEntry(IN OUT PKGDTENTRY Entry, IN ULONG32 Base, IN ULONG Limit, IN UCHAR Type, IN UCHAR Dpl, IN UCHAR SegMode)
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union _KGDTENTRY::@2351 HighWord
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