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1 /*++
2
3 Copyright (c) 2004 - 2010, Intel Corporation. All rights reserved.<BR>
4 This program and the accompanying materials
5 are licensed and made available under the terms and conditions of the BSD License
6 which accompanies this distribution. The full text of the license may be found at
7 http://opensource.org/licenses/bsd-license.php
8
9 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
10 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
11
12
13 Module Name:
14
15 EdkIIGlueDxeDriverEntryPoint.c
16
17 Abstract:
18
19 Pe/Coff loader
20
21 --*/
22
23 #include "BasePeCoffLibInternals.h"
24
25 /**
26 Retrieves the magic value from the PE/COFF header.
27
28 @param Hdr The buffer in which to return the PE32, PE32+, or TE header.
29
30 @return EFI_IMAGE_NT_OPTIONAL_HDR32_MAGIC - Image is PE32
31 @return EFI_IMAGE_NT_OPTIONAL_HDR64_MAGIC - Image is PE32+
32
33 **/
34 UINT16
35 PeCoffLoaderGetPeHeaderMagicValue (
36 IN EFI_IMAGE_OPTIONAL_HEADER_PTR_UNION Hdr
37 )
38 {
39 //
40 // NOTE: Some versions of Linux ELILO for Itanium have an incorrect magic value
41 // in the PE/COFF Header. If the MachineType is Itanium(IA64) and the
42 // Magic value in the OptionalHeader is EFI_IMAGE_NT_OPTIONAL_HDR32_MAGIC
43 // then override the returned value to EFI_IMAGE_NT_OPTIONAL_HDR64_MAGIC
44 //
45 if (Hdr.Pe32->FileHeader.Machine == EFI_IMAGE_MACHINE_IA64 && Hdr.Pe32->OptionalHeader.Magic == EFI_IMAGE_NT_OPTIONAL_HDR32_MAGIC) {
46 return EFI_IMAGE_NT_OPTIONAL_HDR64_MAGIC;
47 }
48 //
49 // Return the magic value from the PC/COFF Optional Header
50 //
51 return Hdr.Pe32->OptionalHeader.Magic;
52 }
53
54
55 /**
56 Retrieves the PE or TE Header from a PE/COFF or TE image.
57
58 @param ImageContext The context of the image being loaded.
59 @param Hdr The buffer in which to return the PE32, PE32+, or TE header.
60
61 @retval RETURN_SUCCESS The PE or TE Header is read.
62 @retval Other The error status from reading the PE/COFF or TE image using the ImageRead function.
63
64 **/
65 RETURN_STATUS
66 GluePeCoffLoaderGetPeHeader (
67 IN OUT PE_COFF_LOADER_IMAGE_CONTEXT *ImageContext,
68 OUT EFI_IMAGE_OPTIONAL_HEADER_PTR_UNION Hdr
69 )
70 {
71 RETURN_STATUS Status;
72 EFI_IMAGE_DOS_HEADER DosHdr;
73 UINTN Size;
74 UINT16 Magic;
75
76 //
77 // Read the DOS image header to check for it's existance
78 //
79 Size = sizeof (EFI_IMAGE_DOS_HEADER);
80 Status = ImageContext->ImageRead (
81 ImageContext->Handle,
82 0,
83 &Size,
84 &DosHdr
85 );
86 if (RETURN_ERROR (Status)) {
87 ImageContext->ImageError = IMAGE_ERROR_IMAGE_READ;
88 return Status;
89 }
90
91 ImageContext->PeCoffHeaderOffset = 0;
92 if (DosHdr.e_magic == EFI_IMAGE_DOS_SIGNATURE) {
93 //
94 // DOS image header is present, so read the PE header after the DOS image
95 // header
96 //
97 ImageContext->PeCoffHeaderOffset = DosHdr.e_lfanew;
98 }
99
100 //
101 // Read the PE/COFF Header. For PE32 (32-bit) this will read in too much
102 // data, but that should not hurt anythine. Hdr.Pe32->OptionalHeader.Magic
103 // determins if this is a PE32 or PE32+ image. The magic is in the same
104 // location in both images.
105 //
106 Size = sizeof (EFI_IMAGE_OPTIONAL_HEADER_UNION);
107 Status = ImageContext->ImageRead (
108 ImageContext->Handle,
109 ImageContext->PeCoffHeaderOffset,
110 &Size,
111 Hdr.Pe32
112 );
113 if (RETURN_ERROR (Status)) {
114 ImageContext->ImageError = IMAGE_ERROR_IMAGE_READ;
115 return Status;
116 }
117
118 //
119 // Use Signature to figure out if we understand the image format
120 //
121 if (Hdr.Te->Signature == EFI_TE_IMAGE_HEADER_SIGNATURE) {
122 ImageContext->IsTeImage = TRUE;
123 ImageContext->Machine = Hdr.Te->Machine;
124 ImageContext->ImageType = (UINT16)(Hdr.Te->Subsystem);
125 ImageContext->ImageSize = 0;
126 ImageContext->SectionAlignment = 4096;
127 ImageContext->SizeOfHeaders = sizeof (EFI_TE_IMAGE_HEADER) + (UINTN)Hdr.Te->BaseOfCode - (UINTN)Hdr.Te->StrippedSize;
128
129 } else if (Hdr.Pe32->Signature == EFI_IMAGE_NT_SIGNATURE) {
130 ImageContext->IsTeImage = FALSE;
131 ImageContext->Machine = Hdr.Pe32->FileHeader.Machine;
132
133 Magic = PeCoffLoaderGetPeHeaderMagicValue (Hdr);
134
135 if (Magic == EFI_IMAGE_NT_OPTIONAL_HDR32_MAGIC) {
136 //
137 // Use PE32 offset
138 //
139 ImageContext->ImageType = Hdr.Pe32->OptionalHeader.Subsystem;
140 ImageContext->ImageSize = (UINT64)Hdr.Pe32->OptionalHeader.SizeOfImage;
141 ImageContext->SectionAlignment = Hdr.Pe32->OptionalHeader.SectionAlignment;
142 ImageContext->SizeOfHeaders = Hdr.Pe32->OptionalHeader.SizeOfHeaders;
143
144 } else if (Magic == EFI_IMAGE_NT_OPTIONAL_HDR64_MAGIC) {
145 //
146 // Use PE32+ offset
147 //
148 ImageContext->ImageType = Hdr.Pe32Plus->OptionalHeader.Subsystem;
149 ImageContext->ImageSize = (UINT64) Hdr.Pe32Plus->OptionalHeader.SizeOfImage;
150 ImageContext->SectionAlignment = Hdr.Pe32Plus->OptionalHeader.SectionAlignment;
151 ImageContext->SizeOfHeaders = Hdr.Pe32Plus->OptionalHeader.SizeOfHeaders;
152 } else {
153 ImageContext->ImageError = IMAGE_ERROR_INVALID_MACHINE_TYPE;
154 return RETURN_UNSUPPORTED;
155 }
156 } else {
157 ImageContext->ImageError = IMAGE_ERROR_INVALID_MACHINE_TYPE;
158 return RETURN_UNSUPPORTED;
159 }
160
161 if (!PeCoffLoaderImageFormatSupported (ImageContext->Machine)) {
162 //
163 // If the PE/COFF loader does not support the image type return
164 // unsupported. This library can suport lots of types of images
165 // this does not mean the user of this library can call the entry
166 // point of the image.
167 //
168 return RETURN_UNSUPPORTED;
169 }
170
171 return RETURN_SUCCESS;
172 }
173
174
175 /**
176 Retrieves information about a PE/COFF image.
177
178 Computes the PeCoffHeaderOffset, ImageAddress, ImageSize, DestinationAddress, CodeView,
179 PdbPointer, RelocationsStripped, SectionAlignment, SizeOfHeaders, and DebugDirectoryEntryRva
180 fields of the ImageContext structure. If ImageContext is NULL, then return RETURN_INVALID_PARAMETER.
181 If the PE/COFF image accessed through the ImageRead service in the ImageContext structure is not
182 a supported PE/COFF image type, then return RETURN_UNSUPPORTED. If any errors occur while
183 computing the fields of ImageContext, then the error status is returned in the ImageError field of
184 ImageContext.
185
186 @param ImageContext Pointer to the image context structure that describes the PE/COFF
187 image that needs to be examined by this function.
188
189 @retval RETURN_SUCCESS The information on the PE/COFF image was collected.
190 @retval RETURN_INVALID_PARAMETER ImageContext is NULL.
191 @retval RETURN_UNSUPPORTED The PE/COFF image is not supported.
192
193 **/
194 RETURN_STATUS
195 EFIAPI
196 GluePeCoffLoaderGetImageInfo (
197 IN OUT PE_COFF_LOADER_IMAGE_CONTEXT *ImageContext
198 )
199 {
200 RETURN_STATUS Status;
201 EFI_IMAGE_OPTIONAL_HEADER_UNION HdrData;
202 EFI_IMAGE_OPTIONAL_HEADER_PTR_UNION Hdr;
203 EFI_IMAGE_DATA_DIRECTORY *DebugDirectoryEntry;
204 UINTN Size;
205 UINTN Index;
206 UINTN DebugDirectoryEntryRva;
207 UINTN DebugDirectoryEntryFileOffset;
208 UINTN SectionHeaderOffset;
209 EFI_IMAGE_SECTION_HEADER SectionHeader;
210 EFI_IMAGE_DEBUG_DIRECTORY_ENTRY DebugEntry;
211 UINT32 NumberOfRvaAndSizes;
212 UINT16 Magic;
213
214 if (NULL == ImageContext) {
215 return RETURN_INVALID_PARAMETER;
216 }
217 //
218 // Assume success
219 //
220 ImageContext->ImageError = IMAGE_ERROR_SUCCESS;
221
222 Hdr.Union = &HdrData;
223 Status = PeCoffLoaderGetPeHeader (ImageContext, Hdr);
224 if (RETURN_ERROR (Status)) {
225 return Status;
226 }
227
228 Magic = PeCoffLoaderGetPeHeaderMagicValue (Hdr);
229
230 //
231 // Retrieve the base address of the image
232 //
233 if (!(ImageContext->IsTeImage)) {
234 if (Magic == EFI_IMAGE_NT_OPTIONAL_HDR32_MAGIC) {
235 //
236 // Use PE32 offset
237 //
238 ImageContext->ImageAddress = Hdr.Pe32->OptionalHeader.ImageBase;
239 } else {
240 //
241 // Use PE32+ offset
242 //
243 ImageContext->ImageAddress = Hdr.Pe32Plus->OptionalHeader.ImageBase;
244 }
245 } else {
246 ImageContext->ImageAddress = (PHYSICAL_ADDRESS)(Hdr.Te->ImageBase + Hdr.Te->StrippedSize - sizeof (EFI_TE_IMAGE_HEADER));
247 }
248
249 //
250 // Initialize the alternate destination address to 0 indicating that it
251 // should not be used.
252 //
253 ImageContext->DestinationAddress = 0;
254
255 //
256 // Initialize the codeview pointer.
257 //
258 ImageContext->CodeView = NULL;
259 ImageContext->PdbPointer = NULL;
260
261 //
262 // Three cases with regards to relocations:
263 // - Image has base relocs, RELOCS_STRIPPED==0 => image is relocatable
264 // - Image has no base relocs, RELOCS_STRIPPED==1 => Image is not relocatable
265 // - Image has no base relocs, RELOCS_STRIPPED==0 => Image is relocatable but
266 // has no base relocs to apply
267 // Obviously having base relocations with RELOCS_STRIPPED==1 is invalid.
268 //
269 // Look at the file header to determine if relocations have been stripped, and
270 // save this info in the image context for later use.
271 //
272 if ((!(ImageContext->IsTeImage)) && ((Hdr.Pe32->FileHeader.Characteristics & EFI_IMAGE_FILE_RELOCS_STRIPPED) != 0)) {
273 ImageContext->RelocationsStripped = TRUE;
274 } else {
275 ImageContext->RelocationsStripped = FALSE;
276 }
277
278 if (!(ImageContext->IsTeImage)) {
279 if (Magic == EFI_IMAGE_NT_OPTIONAL_HDR32_MAGIC) {
280 //
281 // Use PE32 offset
282 //
283 NumberOfRvaAndSizes = Hdr.Pe32->OptionalHeader.NumberOfRvaAndSizes;
284 DebugDirectoryEntry = (EFI_IMAGE_DATA_DIRECTORY *)&(Hdr.Pe32->OptionalHeader.DataDirectory[EFI_IMAGE_DIRECTORY_ENTRY_DEBUG]);
285 } else {
286 //
287 // Use PE32+ offset
288 //
289 NumberOfRvaAndSizes = Hdr.Pe32Plus->OptionalHeader.NumberOfRvaAndSizes;
290 DebugDirectoryEntry = (EFI_IMAGE_DATA_DIRECTORY *)&(Hdr.Pe32Plus->OptionalHeader.DataDirectory[EFI_IMAGE_DIRECTORY_ENTRY_DEBUG]);
291 }
292
293 if (NumberOfRvaAndSizes > EFI_IMAGE_DIRECTORY_ENTRY_DEBUG) {
294
295 DebugDirectoryEntryRva = DebugDirectoryEntry->VirtualAddress;
296
297 //
298 // Determine the file offset of the debug directory... This means we walk
299 // the sections to find which section contains the RVA of the debug
300 // directory
301 //
302 DebugDirectoryEntryFileOffset = 0;
303
304 SectionHeaderOffset = (UINTN)(
305 ImageContext->PeCoffHeaderOffset +
306 sizeof (UINT32) +
307 sizeof (EFI_IMAGE_FILE_HEADER) +
308 Hdr.Pe32->FileHeader.SizeOfOptionalHeader
309 );
310
311 for (Index = 0; Index < Hdr.Pe32->FileHeader.NumberOfSections; Index++) {
312 //
313 // Read section header from file
314 //
315 Size = sizeof (EFI_IMAGE_SECTION_HEADER);
316 Status = ImageContext->ImageRead (
317 ImageContext->Handle,
318 SectionHeaderOffset,
319 &Size,
320 &SectionHeader
321 );
322 if (RETURN_ERROR (Status)) {
323 ImageContext->ImageError = IMAGE_ERROR_IMAGE_READ;
324 return Status;
325 }
326
327 if (DebugDirectoryEntryRva >= SectionHeader.VirtualAddress &&
328 DebugDirectoryEntryRva < SectionHeader.VirtualAddress + SectionHeader.Misc.VirtualSize) {
329
330 DebugDirectoryEntryFileOffset = DebugDirectoryEntryRva - SectionHeader.VirtualAddress + SectionHeader.PointerToRawData;
331 break;
332 }
333
334 SectionHeaderOffset += sizeof (EFI_IMAGE_SECTION_HEADER);
335 }
336
337 if (DebugDirectoryEntryFileOffset != 0) {
338 for (Index = 0; Index < DebugDirectoryEntry->Size; Index += sizeof (EFI_IMAGE_DEBUG_DIRECTORY_ENTRY)) {
339 //
340 // Read next debug directory entry
341 //
342 Size = sizeof (EFI_IMAGE_DEBUG_DIRECTORY_ENTRY);
343 Status = ImageContext->ImageRead (
344 ImageContext->Handle,
345 DebugDirectoryEntryFileOffset,
346 &Size,
347 &DebugEntry
348 );
349 if (RETURN_ERROR (Status)) {
350 ImageContext->ImageError = IMAGE_ERROR_IMAGE_READ;
351 return Status;
352 }
353 if (DebugEntry.Type == EFI_IMAGE_DEBUG_TYPE_CODEVIEW) {
354 ImageContext->DebugDirectoryEntryRva = (UINT32) (DebugDirectoryEntryRva + Index);
355 if (DebugEntry.RVA == 0 && DebugEntry.FileOffset != 0) {
356 ImageContext->ImageSize += DebugEntry.SizeOfData;
357 }
358
359 return RETURN_SUCCESS;
360 }
361 }
362 }
363 }
364 } else {
365
366 DebugDirectoryEntry = &Hdr.Te->DataDirectory[1];
367 DebugDirectoryEntryRva = DebugDirectoryEntry->VirtualAddress;
368 SectionHeaderOffset = (UINTN)(sizeof (EFI_TE_IMAGE_HEADER));
369
370 DebugDirectoryEntryFileOffset = 0;
371
372 for (Index = 0; Index < Hdr.Te->NumberOfSections;) {
373 //
374 // Read section header from file
375 //
376 Size = sizeof (EFI_IMAGE_SECTION_HEADER);
377 Status = ImageContext->ImageRead (
378 ImageContext->Handle,
379 SectionHeaderOffset,
380 &Size,
381 &SectionHeader
382 );
383 if (RETURN_ERROR (Status)) {
384 ImageContext->ImageError = IMAGE_ERROR_IMAGE_READ;
385 return Status;
386 }
387
388 if (DebugDirectoryEntryRva >= SectionHeader.VirtualAddress &&
389 DebugDirectoryEntryRva < SectionHeader.VirtualAddress + SectionHeader.Misc.VirtualSize) {
390 DebugDirectoryEntryFileOffset = DebugDirectoryEntryRva -
391 SectionHeader.VirtualAddress +
392 SectionHeader.PointerToRawData +
393 sizeof (EFI_TE_IMAGE_HEADER) -
394 Hdr.Te->StrippedSize;
395
396 //
397 // File offset of the debug directory was found, if this is not the last
398 // section, then skip to the last section for calculating the image size.
399 //
400 if (Index < (UINTN) Hdr.Te->NumberOfSections - 1) {
401 SectionHeaderOffset += (Hdr.Te->NumberOfSections - 1 - Index) * sizeof (EFI_IMAGE_SECTION_HEADER);
402 Index = Hdr.Te->NumberOfSections - 1;
403 continue;
404 }
405 }
406
407 //
408 // In Te image header there is not a field to describe the ImageSize.
409 // Actually, the ImageSize equals the RVA plus the VirtualSize of
410 // the last section mapped into memory (Must be rounded up to
411 // a mulitple of Section Alignment). Per the PE/COFF specification, the
412 // section headers in the Section Table must appear in order of the RVA
413 // values for the corresponding sections. So the ImageSize can be determined
414 // by the RVA and the VirtualSize of the last section header in the
415 // Section Table.
416 //
417 if ((++Index) == (UINTN)Hdr.Te->NumberOfSections) {
418 ImageContext->ImageSize = (SectionHeader.VirtualAddress + SectionHeader.Misc.VirtualSize +
419 ImageContext->SectionAlignment - 1) & ~(ImageContext->SectionAlignment - 1);
420 }
421
422 SectionHeaderOffset += sizeof (EFI_IMAGE_SECTION_HEADER);
423 }
424
425 if (DebugDirectoryEntryFileOffset != 0) {
426 for (Index = 0; Index < DebugDirectoryEntry->Size; Index += sizeof (EFI_IMAGE_DEBUG_DIRECTORY_ENTRY)) {
427 //
428 // Read next debug directory entry
429 //
430 Size = sizeof (EFI_IMAGE_DEBUG_DIRECTORY_ENTRY);
431 Status = ImageContext->ImageRead (
432 ImageContext->Handle,
433 DebugDirectoryEntryFileOffset,
434 &Size,
435 &DebugEntry
436 );
437 if (RETURN_ERROR (Status)) {
438 ImageContext->ImageError = IMAGE_ERROR_IMAGE_READ;
439 return Status;
440 }
441
442 if (DebugEntry.Type == EFI_IMAGE_DEBUG_TYPE_CODEVIEW) {
443 ImageContext->DebugDirectoryEntryRva = (UINT32) (DebugDirectoryEntryRva + Index);
444 return RETURN_SUCCESS;
445 }
446 }
447 }
448 }
449
450 return RETURN_SUCCESS;
451 }
452
453
454 /**
455 Converts an image address to the loaded address.
456
457 @param ImageContext The context of the image being loaded.
458 @param Address The address to be converted to the loaded address.
459
460 @return The converted address or NULL if the address can not be converted.
461
462 **/
463 VOID *
464 GluePeCoffLoaderImageAddress (
465 IN OUT PE_COFF_LOADER_IMAGE_CONTEXT *ImageContext,
466 IN UINTN Address
467 )
468 {
469 //
470 // @bug Check to make sure ImageSize is correct for the relocated image.
471 // it may only work for the file we start with and not the relocated image
472 //
473 if (Address >= ImageContext->ImageSize) {
474 ImageContext->ImageError = IMAGE_ERROR_INVALID_IMAGE_ADDRESS;
475 return NULL;
476 }
477
478 return (CHAR8 *)((UINTN) ImageContext->ImageAddress + Address);
479 }
480
481 /**
482 Applies relocation fixups to a PE/COFF image that was loaded with PeCoffLoaderLoadImage().
483
484 If the DestinationAddress field of ImageContext is 0, then use the ImageAddress field of
485 ImageContext as the relocation base address. Otherwise, use the DestinationAddress field
486 of ImageContext as the relocation base address. The caller must allocate the relocation
487 fixup log buffer and fill in the FixupData field of ImageContext prior to calling this function.
488 If ImageContext is NULL, then ASSERT().
489
490 @param ImageContext Pointer to the image context structure that describes the PE/COFF
491 image that is being relocated.
492
493 @retval RETURN_SUCCESS The PE/COFF image was relocated.
494 Extended status information is in the ImageError field of ImageContext.
495 @retval RETURN_LOAD_ERROR The image in not a valid PE/COFF image.
496 Extended status information is in the ImageError field of ImageContext.
497 @retval RETURN_UNSUPPORTED A relocation record type is not supported.
498 Extended status information is in the ImageError field of ImageContext.
499
500 **/
501 RETURN_STATUS
502 EFIAPI
503 GluePeCoffLoaderRelocateImage (
504 IN OUT PE_COFF_LOADER_IMAGE_CONTEXT *ImageContext
505 )
506 {
507 RETURN_STATUS Status;
508 EFI_IMAGE_OPTIONAL_HEADER_PTR_UNION Hdr;
509 EFI_IMAGE_DATA_DIRECTORY *RelocDir;
510 UINT64 Adjust;
511 EFI_IMAGE_BASE_RELOCATION *RelocBase;
512 EFI_IMAGE_BASE_RELOCATION *RelocBaseEnd;
513 UINT16 *Reloc;
514 UINT16 *RelocEnd;
515 CHAR8 *Fixup;
516 CHAR8 *FixupBase;
517 UINT16 *F16;
518 UINT32 *F32;
519 UINT64 *F64;
520 CHAR8 *FixupData;
521 PHYSICAL_ADDRESS BaseAddress;
522 UINT32 NumberOfRvaAndSizes;
523 UINT16 Magic;
524
525 ASSERT (ImageContext != NULL);
526
527 //
528 // Assume success
529 //
530 ImageContext->ImageError = IMAGE_ERROR_SUCCESS;
531
532 //
533 // If there are no relocation entries, then we are done
534 //
535 if (ImageContext->RelocationsStripped) {
536 return RETURN_SUCCESS;
537 }
538
539 //
540 // If the destination address is not 0, use that rather than the
541 // image address as the relocation target.
542 //
543 if (ImageContext->DestinationAddress != 0) {
544 BaseAddress = ImageContext->DestinationAddress;
545 } else if (!(ImageContext->IsTeImage)) {
546 BaseAddress = ImageContext->ImageAddress;
547 } else {
548 Hdr.Te = (EFI_TE_IMAGE_HEADER *)(UINTN)(ImageContext->ImageAddress);
549 BaseAddress = ImageContext->ImageAddress + sizeof (EFI_TE_IMAGE_HEADER) - Hdr.Te->StrippedSize;
550 }
551
552 if (!(ImageContext->IsTeImage)) {
553 Hdr.Pe32 = (EFI_IMAGE_NT_HEADERS32 *)((UINTN)ImageContext->ImageAddress + ImageContext->PeCoffHeaderOffset);
554
555 Magic = PeCoffLoaderGetPeHeaderMagicValue (Hdr);
556
557 if (Magic == EFI_IMAGE_NT_OPTIONAL_HDR32_MAGIC) {
558 //
559 // Use PE32 offset
560 //
561 Adjust = (UINT64)BaseAddress - Hdr.Pe32->OptionalHeader.ImageBase;
562 Hdr.Pe32->OptionalHeader.ImageBase = (UINT32)BaseAddress;
563
564 NumberOfRvaAndSizes = Hdr.Pe32->OptionalHeader.NumberOfRvaAndSizes;
565 RelocDir = &Hdr.Pe32->OptionalHeader.DataDirectory[EFI_IMAGE_DIRECTORY_ENTRY_BASERELOC];
566 } else {
567 //
568 // Use PE32+ offset
569 //
570 Adjust = (UINT64) BaseAddress - Hdr.Pe32Plus->OptionalHeader.ImageBase;
571 Hdr.Pe32Plus->OptionalHeader.ImageBase = (UINT64)BaseAddress;
572
573 NumberOfRvaAndSizes = Hdr.Pe32Plus->OptionalHeader.NumberOfRvaAndSizes;
574 RelocDir = &Hdr.Pe32Plus->OptionalHeader.DataDirectory[EFI_IMAGE_DIRECTORY_ENTRY_BASERELOC];
575 }
576
577 //
578 // Find the relocation block
579 // Per the PE/COFF spec, you can't assume that a given data directory
580 // is present in the image. You have to check the NumberOfRvaAndSizes in
581 // the optional header to verify a desired directory entry is there.
582 //
583
584 if (NumberOfRvaAndSizes > EFI_IMAGE_DIRECTORY_ENTRY_BASERELOC && RelocDir->Size > 0) {
585 RelocBase = PeCoffLoaderImageAddress (ImageContext, RelocDir->VirtualAddress);
586 RelocBaseEnd = PeCoffLoaderImageAddress (
587 ImageContext,
588 RelocDir->VirtualAddress + RelocDir->Size - 1
589 );
590 if ((RelocBase == NULL) || (RelocBaseEnd == NULL)) {
591 //
592 // If the base start or end address resolved to 0, then fail.
593 //
594 return RETURN_LOAD_ERROR;
595 }
596 } else {
597 //
598 // Set base and end to bypass processing below.
599 //
600 RelocBase = RelocBaseEnd = 0;
601 }
602 } else {
603 Hdr.Te = (EFI_TE_IMAGE_HEADER *)(UINTN)(ImageContext->ImageAddress);
604 Adjust = (UINT64) (BaseAddress - Hdr.Te->ImageBase);
605 Hdr.Te->ImageBase = (UINT64) (BaseAddress);
606
607 //
608 // Find the relocation block
609 //
610 RelocDir = &Hdr.Te->DataDirectory[0];
611 if (RelocDir->Size > 0) {
612 RelocBase = (EFI_IMAGE_BASE_RELOCATION *)(UINTN)(
613 ImageContext->ImageAddress +
614 RelocDir->VirtualAddress +
615 sizeof(EFI_TE_IMAGE_HEADER) -
616 Hdr.Te->StrippedSize
617 );
618 RelocBaseEnd = (EFI_IMAGE_BASE_RELOCATION *) ((UINTN) RelocBase + (UINTN) RelocDir->Size - 1);
619 } else {
620 //
621 // Set base and end to bypass processing below.
622 //
623 RelocBase = NULL;
624 RelocBaseEnd = NULL;
625 }
626 }
627
628 //
629 // Run the relocation information and apply the fixups
630 //
631 FixupData = ImageContext->FixupData;
632 while (RelocBase < RelocBaseEnd) {
633
634 Reloc = (UINT16 *) ((CHAR8 *) RelocBase + sizeof (EFI_IMAGE_BASE_RELOCATION));
635 RelocEnd = (UINT16 *) ((CHAR8 *) RelocBase + RelocBase->SizeOfBlock);
636 if (!(ImageContext->IsTeImage)) {
637 FixupBase = PeCoffLoaderImageAddress (ImageContext, RelocBase->VirtualAddress);
638
639 if (FixupBase == NULL) {
640 //
641 // If the FixupBase address resolved to 0, then fail.
642 //
643 return RETURN_LOAD_ERROR;
644 }
645 } else {
646 FixupBase = (CHAR8 *)(UINTN)(ImageContext->ImageAddress +
647 RelocBase->VirtualAddress +
648 sizeof(EFI_TE_IMAGE_HEADER) -
649 Hdr.Te->StrippedSize
650 );
651 }
652
653 if ((CHAR8 *) RelocEnd < (CHAR8 *) ((UINTN) ImageContext->ImageAddress) ||
654 (CHAR8 *) RelocEnd > (CHAR8 *)((UINTN)ImageContext->ImageAddress +
655 (UINTN)ImageContext->ImageSize)) {
656 ImageContext->ImageError = IMAGE_ERROR_FAILED_RELOCATION;
657 return RETURN_LOAD_ERROR;
658 }
659
660 //
661 // Run this relocation record
662 //
663 while (Reloc < RelocEnd) {
664
665 Fixup = FixupBase + (*Reloc & 0xFFF);
666 switch ((*Reloc) >> 12) {
667 case EFI_IMAGE_REL_BASED_ABSOLUTE:
668 break;
669
670 case EFI_IMAGE_REL_BASED_HIGH:
671 F16 = (UINT16 *) Fixup;
672 *F16 = (UINT16) (*F16 + ((UINT16) ((UINT32) Adjust >> 16)));
673 if (FixupData != NULL) {
674 *(UINT16 *) FixupData = *F16;
675 FixupData = FixupData + sizeof (UINT16);
676 }
677 break;
678
679 case EFI_IMAGE_REL_BASED_LOW:
680 F16 = (UINT16 *) Fixup;
681 *F16 = (UINT16) (*F16 + (UINT16) Adjust);
682 if (FixupData != NULL) {
683 *(UINT16 *) FixupData = *F16;
684 FixupData = FixupData + sizeof (UINT16);
685 }
686 break;
687
688 case EFI_IMAGE_REL_BASED_HIGHLOW:
689 F32 = (UINT32 *) Fixup;
690 *F32 = *F32 + (UINT32) Adjust;
691 if (FixupData != NULL) {
692 FixupData = ALIGN_POINTER (FixupData, sizeof (UINT32));
693 *(UINT32 *)FixupData = *F32;
694 FixupData = FixupData + sizeof (UINT32);
695 }
696 break;
697
698 case EFI_IMAGE_REL_BASED_DIR64:
699 F64 = (UINT64 *) Fixup;
700 *F64 = *F64 + (UINT64) Adjust;
701 if (FixupData != NULL) {
702 FixupData = ALIGN_POINTER (FixupData, sizeof(UINT64));
703 *(UINT64 *)(FixupData) = *F64;
704 FixupData = FixupData + sizeof(UINT64);
705 }
706 break;
707
708 default:
709 //
710 // The common code does not handle some of the stranger IPF relocations
711 // PeCoffLoaderRelocateImageEx () addes support for these complex fixups
712 // on IPF and is a No-Op on other archtiectures.
713 //
714 Status = PeCoffLoaderRelocateImageEx (Reloc, Fixup, &FixupData, Adjust);
715 if (RETURN_ERROR (Status)) {
716 ImageContext->ImageError = IMAGE_ERROR_FAILED_RELOCATION;
717 return Status;
718 }
719 }
720
721 //
722 // Next relocation record
723 //
724 Reloc += 1;
725 }
726
727 //
728 // Next reloc block
729 //
730 RelocBase = (EFI_IMAGE_BASE_RELOCATION *) RelocEnd;
731 }
732
733 return RETURN_SUCCESS;
734 }
735
736 /**
737 Loads a PE/COFF image into memory.
738
739 Loads the PE/COFF image accessed through the ImageRead service of ImageContext into the buffer
740 specified by the ImageAddress and ImageSize fields of ImageContext. The caller must allocate
741 the load buffer and fill in the ImageAddress and ImageSize fields prior to calling this function.
742 The EntryPoint, FixupDataSize, CodeView, and PdbPointer fields of ImageContext are computed.
743 If ImageContext is NULL, then ASSERT().
744
745 @param ImageContext Pointer to the image context structure that describes the PE/COFF
746 image that is being loaded.
747
748 @retval RETURN_SUCCESS The PE/COFF image was loaded into the buffer specified by
749 the ImageAddress and ImageSize fields of ImageContext.
750 Extended status information is in the ImageError field of ImageContext.
751 @retval RETURN_BUFFER_TOO_SMALL The caller did not provide a large enough buffer.
752 Extended status information is in the ImageError field of ImageContext.
753 @retval RETURN_LOAD_ERROR The PE/COFF image is an EFI Runtime image with no relocations.
754 Extended status information is in the ImageError field of ImageContext.
755 @retval RETURN_INVALID_PARAMETER The image address is invalid.
756 Extended status information is in the ImageError field of ImageContext.
757
758 **/
759 RETURN_STATUS
760 EFIAPI
761 GluePeCoffLoaderLoadImage (
762 IN OUT PE_COFF_LOADER_IMAGE_CONTEXT *ImageContext
763 )
764 {
765 RETURN_STATUS Status;
766 EFI_IMAGE_OPTIONAL_HEADER_PTR_UNION Hdr;
767 PE_COFF_LOADER_IMAGE_CONTEXT CheckContext;
768 EFI_IMAGE_SECTION_HEADER *FirstSection;
769 EFI_IMAGE_SECTION_HEADER *Section;
770 UINTN NumberOfSections;
771 UINTN Index;
772 CHAR8 *Base;
773 CHAR8 *End;
774 CHAR8 *MaxEnd;
775 EFI_IMAGE_DATA_DIRECTORY *DirectoryEntry;
776 EFI_IMAGE_DEBUG_DIRECTORY_ENTRY *DebugEntry;
777 UINTN Size;
778 UINT32 TempDebugEntryRva;
779 UINT32 NumberOfRvaAndSizes;
780 UINT16 Magic;
781
782 ASSERT (ImageContext != NULL);
783
784 //
785 // Assume success
786 //
787 ImageContext->ImageError = IMAGE_ERROR_SUCCESS;
788
789 //
790 // Copy the provided context info into our local version, get what we
791 // can from the original image, and then use that to make sure everything
792 // is legit.
793 //
794 CopyMem (&CheckContext, ImageContext, sizeof (PE_COFF_LOADER_IMAGE_CONTEXT));
795
796 Status = PeCoffLoaderGetImageInfo (&CheckContext);
797 if (RETURN_ERROR (Status)) {
798 return Status;
799 }
800
801 //
802 // Make sure there is enough allocated space for the image being loaded
803 //
804 if (ImageContext->ImageSize < CheckContext.ImageSize) {
805 ImageContext->ImageError = IMAGE_ERROR_INVALID_IMAGE_SIZE;
806 return RETURN_BUFFER_TOO_SMALL;
807 }
808 if (ImageContext->ImageAddress == 0) {
809 //
810 // Image cannot be loaded into 0 address.
811 //
812 ImageContext->ImageError = IMAGE_ERROR_INVALID_IMAGE_ADDRESS;
813 return RETURN_INVALID_PARAMETER;
814 }
815 //
816 // If there's no relocations, then make sure it's not a runtime driver,
817 // and that it's being loaded at the linked address.
818 //
819 if (CheckContext.RelocationsStripped) {
820 //
821 // If the image does not contain relocations and it is a runtime driver
822 // then return an error.
823 //
824 if (CheckContext.ImageType == EFI_IMAGE_SUBSYSTEM_EFI_RUNTIME_DRIVER) {
825 ImageContext->ImageError = IMAGE_ERROR_INVALID_SUBSYSTEM;
826 return RETURN_LOAD_ERROR;
827 }
828 //
829 // If the image does not contain relocations, and the requested load address
830 // is not the linked address, then return an error.
831 //
832 if (CheckContext.ImageAddress != ImageContext->ImageAddress) {
833 ImageContext->ImageError = IMAGE_ERROR_INVALID_IMAGE_ADDRESS;
834 return RETURN_INVALID_PARAMETER;
835 }
836 }
837 //
838 // Make sure the allocated space has the proper section alignment
839 //
840 if (!(ImageContext->IsTeImage)) {
841 if ((ImageContext->ImageAddress & (CheckContext.SectionAlignment - 1)) != 0) {
842 ImageContext->ImageError = IMAGE_ERROR_INVALID_SECTION_ALIGNMENT;
843 return RETURN_INVALID_PARAMETER;
844 }
845 }
846 //
847 // Read the entire PE/COFF or TE header into memory
848 //
849 if (!(ImageContext->IsTeImage)) {
850 Status = ImageContext->ImageRead (
851 ImageContext->Handle,
852 0,
853 &ImageContext->SizeOfHeaders,
854 (VOID *) (UINTN) ImageContext->ImageAddress
855 );
856
857 Hdr.Pe32 = (EFI_IMAGE_NT_HEADERS32 *)((UINTN)ImageContext->ImageAddress + ImageContext->PeCoffHeaderOffset);
858
859 FirstSection = (EFI_IMAGE_SECTION_HEADER *) (
860 (UINTN)ImageContext->ImageAddress +
861 ImageContext->PeCoffHeaderOffset +
862 sizeof(UINT32) +
863 sizeof(EFI_IMAGE_FILE_HEADER) +
864 Hdr.Pe32->FileHeader.SizeOfOptionalHeader
865 );
866 NumberOfSections = (UINTN) (Hdr.Pe32->FileHeader.NumberOfSections);
867 } else {
868 Status = ImageContext->ImageRead (
869 ImageContext->Handle,
870 0,
871 &ImageContext->SizeOfHeaders,
872 (void *)(UINTN)ImageContext->ImageAddress
873 );
874
875 Hdr.Te = (EFI_TE_IMAGE_HEADER *)(UINTN)(ImageContext->ImageAddress);
876
877 FirstSection = (EFI_IMAGE_SECTION_HEADER *) (
878 (UINTN)ImageContext->ImageAddress +
879 sizeof(EFI_TE_IMAGE_HEADER)
880 );
881 NumberOfSections = (UINTN) (Hdr.Te->NumberOfSections);
882
883 }
884
885 if (RETURN_ERROR (Status)) {
886 ImageContext->ImageError = IMAGE_ERROR_IMAGE_READ;
887 return RETURN_LOAD_ERROR;
888 }
889
890 //
891 // Load each section of the image
892 //
893 Section = FirstSection;
894 for (Index = 0, MaxEnd = NULL; Index < NumberOfSections; Index++) {
895
896 //
897 // Compute sections address
898 //
899 Base = PeCoffLoaderImageAddress (ImageContext, Section->VirtualAddress);
900 End = PeCoffLoaderImageAddress (
901 ImageContext,
902 Section->VirtualAddress + Section->Misc.VirtualSize - 1
903 );
904 if (ImageContext->IsTeImage) {
905 Base = (CHAR8 *)((UINTN) Base + sizeof (EFI_TE_IMAGE_HEADER) - (UINTN)Hdr.Te->StrippedSize);
906 End = (CHAR8 *)((UINTN) End + sizeof (EFI_TE_IMAGE_HEADER) - (UINTN)Hdr.Te->StrippedSize);
907 }
908
909 if (End > MaxEnd) {
910 MaxEnd = End;
911 }
912 //
913 // If the base start or end address resolved to 0, then fail.
914 //
915 if ((Base == NULL) || (End == NULL)) {
916 ImageContext->ImageError = IMAGE_ERROR_SECTION_NOT_LOADED;
917 return RETURN_LOAD_ERROR;
918 }
919
920 //
921 // Read the section
922 //
923 Size = (UINTN) Section->Misc.VirtualSize;
924 if ((Size == 0) || (Size > Section->SizeOfRawData)) {
925 Size = (UINTN) Section->SizeOfRawData;
926 }
927
928 if (Section->SizeOfRawData) {
929 if (!(ImageContext->IsTeImage)) {
930 Status = ImageContext->ImageRead (
931 ImageContext->Handle,
932 Section->PointerToRawData,
933 &Size,
934 Base
935 );
936 } else {
937 Status = ImageContext->ImageRead (
938 ImageContext->Handle,
939 Section->PointerToRawData + sizeof (EFI_TE_IMAGE_HEADER) - (UINTN)Hdr.Te->StrippedSize,
940 &Size,
941 Base
942 );
943 }
944
945 if (RETURN_ERROR (Status)) {
946 ImageContext->ImageError = IMAGE_ERROR_IMAGE_READ;
947 return Status;
948 }
949 }
950
951 //
952 // If raw size is less then virt size, zero fill the remaining
953 //
954
955 if (Size < Section->Misc.VirtualSize) {
956 ZeroMem (Base + Size, Section->Misc.VirtualSize - Size);
957 }
958
959 //
960 // Next Section
961 //
962 Section += 1;
963 }
964
965 //
966 // Get image's entry point
967 //
968 Magic = PeCoffLoaderGetPeHeaderMagicValue (Hdr);
969 if (!(ImageContext->IsTeImage)) {
970 //
971 // Sizes of AddressOfEntryPoint are different so we need to do this safely
972 //
973 if (Magic == EFI_IMAGE_NT_OPTIONAL_HDR32_MAGIC) {
974 //
975 // Use PE32 offset
976 //
977 ImageContext->EntryPoint = (PHYSICAL_ADDRESS)(UINTN)PeCoffLoaderImageAddress (
978 ImageContext,
979 (UINTN)Hdr.Pe32->OptionalHeader.AddressOfEntryPoint
980 );
981 } else {
982 //
983 // Use PE32+ offset
984 //
985 ImageContext->EntryPoint = (PHYSICAL_ADDRESS)(UINTN)PeCoffLoaderImageAddress (
986 ImageContext,
987 (UINTN)Hdr.Pe32Plus->OptionalHeader.AddressOfEntryPoint
988 );
989 }
990 } else {
991 ImageContext->EntryPoint = (PHYSICAL_ADDRESS) (
992 (UINTN)ImageContext->ImageAddress +
993 (UINTN)Hdr.Te->AddressOfEntryPoint +
994 (UINTN)sizeof(EFI_TE_IMAGE_HEADER) -
995 (UINTN)Hdr.Te->StrippedSize
996 );
997 }
998
999 //
1000 // Determine the size of the fixup data
1001 //
1002 // Per the PE/COFF spec, you can't assume that a given data directory
1003 // is present in the image. You have to check the NumberOfRvaAndSizes in
1004 // the optional header to verify a desired directory entry is there.
1005 //
1006 if (!(ImageContext->IsTeImage)) {
1007 if (Magic == EFI_IMAGE_NT_OPTIONAL_HDR32_MAGIC) {
1008 //
1009 // Use PE32 offset
1010 //
1011 NumberOfRvaAndSizes = Hdr.Pe32->OptionalHeader.NumberOfRvaAndSizes;
1012 DirectoryEntry = (EFI_IMAGE_DATA_DIRECTORY *)&Hdr.Pe32->OptionalHeader.DataDirectory[EFI_IMAGE_DIRECTORY_ENTRY_BASERELOC];
1013 } else {
1014 //
1015 // Use PE32+ offset
1016 //
1017 NumberOfRvaAndSizes = Hdr.Pe32Plus->OptionalHeader.NumberOfRvaAndSizes;
1018 DirectoryEntry = (EFI_IMAGE_DATA_DIRECTORY *)&Hdr.Pe32Plus->OptionalHeader.DataDirectory[EFI_IMAGE_DIRECTORY_ENTRY_BASERELOC];
1019 }
1020
1021 if (NumberOfRvaAndSizes > EFI_IMAGE_DIRECTORY_ENTRY_BASERELOC) {
1022 ImageContext->FixupDataSize = DirectoryEntry->Size / sizeof (UINT16) * sizeof (UINTN);
1023 } else {
1024 ImageContext->FixupDataSize = 0;
1025 }
1026 } else {
1027 DirectoryEntry = &Hdr.Te->DataDirectory[0];
1028 ImageContext->FixupDataSize = DirectoryEntry->Size / sizeof (UINT16) * sizeof (UINTN);
1029 }
1030 //
1031 // Consumer must allocate a buffer for the relocation fixup log.
1032 // Only used for runtime drivers.
1033 //
1034 ImageContext->FixupData = NULL;
1035
1036 //
1037 // Load the Codeview info if present
1038 //
1039 if (ImageContext->DebugDirectoryEntryRva != 0) {
1040 if (!(ImageContext->IsTeImage)) {
1041 DebugEntry = PeCoffLoaderImageAddress (
1042 ImageContext,
1043 ImageContext->DebugDirectoryEntryRva
1044 );
1045 } else {
1046 DebugEntry = (EFI_IMAGE_DEBUG_DIRECTORY_ENTRY *)(UINTN)(
1047 ImageContext->ImageAddress +
1048 ImageContext->DebugDirectoryEntryRva +
1049 sizeof(EFI_TE_IMAGE_HEADER) -
1050 Hdr.Te->StrippedSize
1051 );
1052 }
1053
1054 if (DebugEntry != NULL) {
1055 TempDebugEntryRva = DebugEntry->RVA;
1056 if (DebugEntry->RVA == 0 && DebugEntry->FileOffset != 0) {
1057 Section--;
1058 if ((UINTN)Section->SizeOfRawData < Section->Misc.VirtualSize) {
1059 TempDebugEntryRva = Section->VirtualAddress + Section->Misc.VirtualSize;
1060 } else {
1061 TempDebugEntryRva = Section->VirtualAddress + Section->SizeOfRawData;
1062 }
1063 }
1064
1065 if (TempDebugEntryRva != 0) {
1066 if (!(ImageContext->IsTeImage)) {
1067 ImageContext->CodeView = PeCoffLoaderImageAddress (ImageContext, TempDebugEntryRva);
1068 } else {
1069 ImageContext->CodeView = (VOID *)(
1070 (UINTN)ImageContext->ImageAddress +
1071 (UINTN)TempDebugEntryRva +
1072 (UINTN)sizeof (EFI_TE_IMAGE_HEADER) -
1073 (UINTN) Hdr.Te->StrippedSize
1074 );
1075 }
1076
1077 if (ImageContext->CodeView == NULL) {
1078 ImageContext->ImageError = IMAGE_ERROR_IMAGE_READ;
1079 return RETURN_LOAD_ERROR;
1080 }
1081
1082 if (DebugEntry->RVA == 0) {
1083 Size = DebugEntry->SizeOfData;
1084 if (!(ImageContext->IsTeImage)) {
1085 Status = ImageContext->ImageRead (
1086 ImageContext->Handle,
1087 DebugEntry->FileOffset,
1088 &Size,
1089 ImageContext->CodeView
1090 );
1091 } else {
1092 Status = ImageContext->ImageRead (
1093 ImageContext->Handle,
1094 DebugEntry->FileOffset + sizeof (EFI_TE_IMAGE_HEADER) - Hdr.Te->StrippedSize,
1095 &Size,
1096 ImageContext->CodeView
1097 );
1098 //
1099 // Should we apply fix up to this field according to the size difference between PE and TE?
1100 // Because now we maintain TE header fields unfixed, this field will also remain as they are
1101 // in original PE image.
1102 //
1103 }
1104
1105 if (RETURN_ERROR (Status)) {
1106 ImageContext->ImageError = IMAGE_ERROR_IMAGE_READ;
1107 return RETURN_LOAD_ERROR;
1108 }
1109
1110 DebugEntry->RVA = TempDebugEntryRva;
1111 }
1112
1113 switch (*(UINT32 *) ImageContext->CodeView) {
1114 case CODEVIEW_SIGNATURE_NB10:
1115 ImageContext->PdbPointer = (CHAR8 *)ImageContext->CodeView + sizeof (EFI_IMAGE_DEBUG_CODEVIEW_NB10_ENTRY);
1116 break;
1117
1118 case CODEVIEW_SIGNATURE_RSDS:
1119 ImageContext->PdbPointer = (CHAR8 *)ImageContext->CodeView + sizeof (EFI_IMAGE_DEBUG_CODEVIEW_RSDS_ENTRY);
1120 break;
1121
1122 default:
1123 break;
1124 }
1125 }
1126 }
1127 }
1128
1129 return Status;
1130 }
1131
1132
1133 /**
1134 Reapply fixups on a fixed up PE32/PE32+ image to allow virutal calling at EFI
1135 runtime.
1136
1137 PE_COFF_LOADER_IMAGE_CONTEXT.FixupData stores information needed to reapply
1138 the fixups with a virtual mapping.
1139
1140
1141 @param ImageBase Base address of relocated image
1142 @param VirtImageBase Virtual mapping for ImageBase
1143 @param ImageSize Size of the image to relocate
1144 @param RelocationData Location to place results of read
1145
1146 **/
1147 VOID
1148 EFIAPI
1149 PeCoffLoaderRelocateImageForRuntime (
1150 IN PHYSICAL_ADDRESS ImageBase,
1151 IN PHYSICAL_ADDRESS VirtImageBase,
1152 IN UINTN ImageSize,
1153 IN VOID *RelocationData
1154 )
1155 {
1156 CHAR8 *OldBase;
1157 CHAR8 *NewBase;
1158 EFI_IMAGE_DOS_HEADER *DosHdr;
1159 EFI_IMAGE_OPTIONAL_HEADER_PTR_UNION Hdr;
1160 UINT32 NumberOfRvaAndSizes;
1161 EFI_IMAGE_DATA_DIRECTORY *DataDirectory;
1162 EFI_IMAGE_DATA_DIRECTORY *RelocDir;
1163 EFI_IMAGE_BASE_RELOCATION *RelocBase;
1164 EFI_IMAGE_BASE_RELOCATION *RelocBaseEnd;
1165 UINT16 *Reloc;
1166 UINT16 *RelocEnd;
1167 CHAR8 *Fixup;
1168 CHAR8 *FixupBase;
1169 UINT16 *F16;
1170 UINT32 *F32;
1171 UINT64 *F64;
1172 CHAR8 *FixupData;
1173 UINTN Adjust;
1174 RETURN_STATUS Status;
1175 UINT16 Magic;
1176
1177 OldBase = (CHAR8 *)((UINTN)ImageBase);
1178 NewBase = (CHAR8 *)((UINTN)VirtImageBase);
1179 Adjust = (UINTN) NewBase - (UINTN) OldBase;
1180
1181 //
1182 // Find the image's relocate dir info
1183 //
1184 DosHdr = (EFI_IMAGE_DOS_HEADER *)OldBase;
1185 if (DosHdr->e_magic == EFI_IMAGE_DOS_SIGNATURE) {
1186 //
1187 // Valid DOS header so get address of PE header
1188 //
1189 Hdr.Pe32 = (EFI_IMAGE_NT_HEADERS32 *)(((CHAR8 *)DosHdr) + DosHdr->e_lfanew);
1190 } else {
1191 //
1192 // No Dos header so assume image starts with PE header.
1193 //
1194 Hdr.Pe32 = (EFI_IMAGE_NT_HEADERS32 *)OldBase;
1195 }
1196
1197 if (Hdr.Pe32->Signature != EFI_IMAGE_NT_SIGNATURE) {
1198 //
1199 // Not a valid PE image so Exit
1200 //
1201 return ;
1202 }
1203
1204 Magic = PeCoffLoaderGetPeHeaderMagicValue (Hdr);
1205
1206 if (Magic == EFI_IMAGE_NT_OPTIONAL_HDR32_MAGIC) {
1207 //
1208 // Use PE32 offset
1209 //
1210 NumberOfRvaAndSizes = Hdr.Pe32->OptionalHeader.NumberOfRvaAndSizes;
1211 DataDirectory = (EFI_IMAGE_DATA_DIRECTORY *)&(Hdr.Pe32->OptionalHeader.DataDirectory[0]);
1212 } else {
1213 //
1214 // Use PE32+ offset
1215 //
1216 NumberOfRvaAndSizes = Hdr.Pe32Plus->OptionalHeader.NumberOfRvaAndSizes;
1217 DataDirectory = (EFI_IMAGE_DATA_DIRECTORY *)&(Hdr.Pe32Plus->OptionalHeader.DataDirectory[0]);
1218 }
1219
1220 //
1221 // Find the relocation block
1222 //
1223 // Per the PE/COFF spec, you can't assume that a given data directory
1224 // is present in the image. You have to check the NumberOfRvaAndSizes in
1225 // the optional header to verify a desired directory entry is there.
1226 //
1227 if (NumberOfRvaAndSizes > EFI_IMAGE_DIRECTORY_ENTRY_BASERELOC) {
1228 RelocDir = DataDirectory + EFI_IMAGE_DIRECTORY_ENTRY_BASERELOC;
1229 RelocBase = (EFI_IMAGE_BASE_RELOCATION *)(UINTN)(ImageBase + RelocDir->VirtualAddress);
1230 RelocBaseEnd = (EFI_IMAGE_BASE_RELOCATION *)(UINTN)(ImageBase + RelocDir->VirtualAddress + RelocDir->Size);
1231 } else {
1232 //
1233 // Cannot find relocations, cannot continue
1234 //
1235 ASSERT (FALSE);
1236 return ;
1237 }
1238
1239 ASSERT (RelocBase != NULL && RelocBaseEnd != NULL);
1240
1241 //
1242 // Run the whole relocation block. And re-fixup data that has not been
1243 // modified. The FixupData is used to see if the image has been modified
1244 // since it was relocated. This is so data sections that have been updated
1245 // by code will not be fixed up, since that would set them back to
1246 // defaults.
1247 //
1248 FixupData = RelocationData;
1249 while (RelocBase < RelocBaseEnd) {
1250
1251 Reloc = (UINT16 *) ((UINT8 *) RelocBase + sizeof (EFI_IMAGE_BASE_RELOCATION));
1252 RelocEnd = (UINT16 *) ((UINT8 *) RelocBase + RelocBase->SizeOfBlock);
1253 FixupBase = (CHAR8 *) ((UINTN)ImageBase) + RelocBase->VirtualAddress;
1254
1255 //
1256 // Run this relocation record
1257 //
1258 while (Reloc < RelocEnd) {
1259
1260 Fixup = FixupBase + (*Reloc & 0xFFF);
1261 switch ((*Reloc) >> 12) {
1262
1263 case EFI_IMAGE_REL_BASED_ABSOLUTE:
1264 break;
1265
1266 case EFI_IMAGE_REL_BASED_HIGH:
1267 F16 = (UINT16 *) Fixup;
1268 if (*(UINT16 *) FixupData == *F16) {
1269 *F16 = (UINT16) (*F16 + ((UINT16) ((UINT32) Adjust >> 16)));
1270 }
1271
1272 FixupData = FixupData + sizeof (UINT16);
1273 break;
1274
1275 case EFI_IMAGE_REL_BASED_LOW:
1276 F16 = (UINT16 *) Fixup;
1277 if (*(UINT16 *) FixupData == *F16) {
1278 *F16 = (UINT16) (*F16 + ((UINT16) Adjust & 0xffff));
1279 }
1280
1281 FixupData = FixupData + sizeof (UINT16);
1282 break;
1283
1284 case EFI_IMAGE_REL_BASED_HIGHLOW:
1285 F32 = (UINT32 *) Fixup;
1286 FixupData = ALIGN_POINTER (FixupData, sizeof (UINT32));
1287 if (*(UINT32 *) FixupData == *F32) {
1288 *F32 = *F32 + (UINT32) Adjust;
1289 }
1290
1291 FixupData = FixupData + sizeof (UINT32);
1292 break;
1293
1294 case EFI_IMAGE_REL_BASED_DIR64:
1295 F64 = (UINT64 *)Fixup;
1296 FixupData = ALIGN_POINTER (FixupData, sizeof (UINT64));
1297 if (*(UINT64 *) FixupData == *F64) {
1298 *F64 = *F64 + (UINT64)Adjust;
1299 }
1300
1301 FixupData = FixupData + sizeof (UINT64);
1302 break;
1303
1304 case EFI_IMAGE_REL_BASED_HIGHADJ:
1305 //
1306 // Not implemented, but not used in EFI 1.0
1307 //
1308 ASSERT (FALSE);
1309 break;
1310
1311 default:
1312 //
1313 // Only Itanium requires ConvertPeImage_Ex
1314 //
1315 Status = PeHotRelocateImageEx (Reloc, Fixup, &FixupData, Adjust);
1316 if (RETURN_ERROR (Status)) {
1317 return ;
1318 }
1319 }
1320 //
1321 // Next relocation record
1322 //
1323 Reloc += 1;
1324 }
1325 //
1326 // next reloc block
1327 //
1328 RelocBase = (EFI_IMAGE_BASE_RELOCATION *) RelocEnd;
1329 }
1330 }
1331
1332
1333 /**
1334 ImageRead function that operates on a memory buffer whos base is passed into
1335 FileHandle.
1336
1337 @param FileHandle Ponter to baes of the input stream
1338 @param FileOffset Offset to the start of the buffer
1339 @param ReadSize Number of bytes to copy into the buffer
1340 @param Buffer Location to place results of read
1341
1342 @retval RETURN_SUCCESS Data is read from FileOffset from the Handle into
1343 the buffer.
1344 **/
1345 RETURN_STATUS
1346 EFIAPI
1347 PeCoffLoaderImageReadFromMemory (
1348 IN VOID *FileHandle,
1349 IN UINTN FileOffset,
1350 IN OUT UINTN *ReadSize,
1351 OUT VOID *Buffer
1352 )
1353 {
1354 CopyMem (Buffer, ((UINT8 *)FileHandle) + FileOffset, *ReadSize);
1355 return RETURN_SUCCESS;
1356 }
1357
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