4 Copyright (c) 2010 - 2014, Intel Corporation. All rights reserved.<BR>
5 Portions copyright (c) 2013-2014, ARM Ltd. All rights reserved.<BR>
7 This program and the accompanying materials are licensed and made available
8 under the terms and conditions of the BSD License which accompanies this
9 distribution. The full text of the license may be found at
10 http://opensource.org/licenses/bsd-license.php
12 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
13 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
17 #include "WinNtInclude.h"
30 #include <Common/UefiBaseTypes.h>
31 #include <IndustryStandard/PeImage.h>
33 #include "PeCoffLib.h"
34 #include "EfiUtilityMsgs.h"
37 #include "ElfConvert.h"
38 #include "Elf64Convert.h"
49 SECTION_FILTER_TYPES FilterType
77 // Rename ELF32 strucutres to common names to help when porting to ELF64.
79 typedef Elf64_Shdr Elf_Shdr
;
80 typedef Elf64_Ehdr Elf_Ehdr
;
81 typedef Elf64_Rel Elf_Rel
;
82 typedef Elf64_Rela Elf_Rela
;
83 typedef Elf64_Sym Elf_Sym
;
84 typedef Elf64_Phdr Elf_Phdr
;
85 typedef Elf64_Dyn Elf_Dyn
;
86 #define ELFCLASS ELFCLASS64
87 #define ELF_R_TYPE(r) ELF64_R_TYPE(r)
88 #define ELF_R_SYM(r) ELF64_R_SYM(r)
91 // Well known ELF structures.
93 STATIC Elf_Ehdr
*mEhdr
;
94 STATIC Elf_Shdr
*mShdrBase
;
95 STATIC Elf_Phdr
*mPhdrBase
;
100 STATIC UINT32 mCoffAlignment
= 0x20;
103 // PE section alignment.
105 STATIC
const UINT16 mCoffNbrSections
= 4;
108 // ELF sections to offset in Coff file.
110 STATIC UINT32
*mCoffSectionsOffset
= NULL
;
113 // Offsets in COFF file
115 STATIC UINT32 mNtHdrOffset
;
116 STATIC UINT32 mTextOffset
;
117 STATIC UINT32 mDataOffset
;
118 STATIC UINT32 mHiiRsrcOffset
;
119 STATIC UINT32 mRelocOffset
;
120 STATIC UINT32 mDebugOffset
;
123 // Initialization Function
128 ELF_FUNCTION_TABLE
*ElfFunctions
132 // Initialize data pointer and structures.
134 VerboseMsg ("Set EHDR");
135 mEhdr
= (Elf_Ehdr
*) FileBuffer
;
138 // Check the ELF64 specific header information.
140 VerboseMsg ("Check ELF64 Header Information");
141 if (mEhdr
->e_ident
[EI_CLASS
] != ELFCLASS64
) {
142 Error (NULL
, 0, 3000, "Unsupported", "ELF EI_DATA not ELFCLASS64");
145 if (mEhdr
->e_ident
[EI_DATA
] != ELFDATA2LSB
) {
146 Error (NULL
, 0, 3000, "Unsupported", "ELF EI_DATA not ELFDATA2LSB");
149 if ((mEhdr
->e_type
!= ET_EXEC
) && (mEhdr
->e_type
!= ET_DYN
)) {
150 Error (NULL
, 0, 3000, "Unsupported", "ELF e_type not ET_EXEC or ET_DYN");
153 if (!((mEhdr
->e_machine
== EM_X86_64
) || (mEhdr
->e_machine
== EM_AARCH64
))) {
154 Error (NULL
, 0, 3000, "Unsupported", "ELF e_machine not EM_X86_64 or EM_AARCH64");
157 if (mEhdr
->e_version
!= EV_CURRENT
) {
158 Error (NULL
, 0, 3000, "Unsupported", "ELF e_version (%u) not EV_CURRENT (%d)", (unsigned) mEhdr
->e_version
, EV_CURRENT
);
163 // Update section header pointers
165 VerboseMsg ("Update Header Pointers");
166 mShdrBase
= (Elf_Shdr
*)((UINT8
*)mEhdr
+ mEhdr
->e_shoff
);
167 mPhdrBase
= (Elf_Phdr
*)((UINT8
*)mEhdr
+ mEhdr
->e_phoff
);
170 // Create COFF Section offset buffer and zero.
172 VerboseMsg ("Create COFF Section Offset Buffer");
173 mCoffSectionsOffset
= (UINT32
*)malloc(mEhdr
->e_shnum
* sizeof (UINT32
));
174 memset(mCoffSectionsOffset
, 0, mEhdr
->e_shnum
* sizeof(UINT32
));
177 // Fill in function pointers.
179 VerboseMsg ("Fill in Function Pointers");
180 ElfFunctions
->ScanSections
= ScanSections64
;
181 ElfFunctions
->WriteSections
= WriteSections64
;
182 ElfFunctions
->WriteRelocations
= WriteRelocations64
;
183 ElfFunctions
->WriteDebug
= WriteDebug64
;
184 ElfFunctions
->SetImageSize
= SetImageSize64
;
185 ElfFunctions
->CleanUp
= CleanUp64
;
192 // Header by Index functions
200 if (Num
>= mEhdr
->e_shnum
)
202 return (Elf_Shdr
*)((UINT8
*)mShdrBase
+ Num
* mEhdr
->e_shentsize
);
211 return (Offset
+ mCoffAlignment
- 1) & ~(mCoffAlignment
- 1);
220 return (Offset
+ 3) & ~3;
232 return (BOOLEAN
) ((Shdr
->sh_flags
& (SHF_WRITE
| SHF_ALLOC
)) == SHF_ALLOC
);
241 Elf_Shdr
*Namedr
= GetShdrByIndex(mEhdr
->e_shstrndx
);
243 return (BOOLEAN
) (strcmp((CHAR8
*)mEhdr
+ Namedr
->sh_offset
+ Shdr
->sh_name
, ELF_HII_SECTION_NAME
) == 0);
252 if (IsHiiRsrcShdr(Shdr
)) {
255 return (BOOLEAN
) (Shdr
->sh_flags
& (SHF_WRITE
| SHF_ALLOC
)) == (SHF_ALLOC
| SHF_WRITE
);
259 // Elf functions interface implementation
269 EFI_IMAGE_DOS_HEADER
*DosHdr
;
270 EFI_IMAGE_OPTIONAL_HEADER_UNION
*NtHdr
;
273 BOOLEAN FoundSection
;
279 // Coff file start with a DOS header.
281 mCoffOffset
= sizeof(EFI_IMAGE_DOS_HEADER
) + 0x40;
282 mNtHdrOffset
= mCoffOffset
;
283 switch (mEhdr
->e_machine
) {
287 mCoffOffset
+= sizeof (EFI_IMAGE_NT_HEADERS64
);
290 VerboseMsg ("%s unknown e_machine type. Assume X64", (UINTN
)mEhdr
->e_machine
);
291 mCoffOffset
+= sizeof (EFI_IMAGE_NT_HEADERS64
);
295 mTableOffset
= mCoffOffset
;
296 mCoffOffset
+= mCoffNbrSections
* sizeof(EFI_IMAGE_SECTION_HEADER
);
299 // Set mCoffAlignment to the maximum alignment of the input sections
302 for (i
= 0; i
< mEhdr
->e_shnum
; i
++) {
303 Elf_Shdr
*shdr
= GetShdrByIndex(i
);
304 if (shdr
->sh_addralign
<= mCoffAlignment
) {
307 if (IsTextShdr(shdr
) || IsDataShdr(shdr
) || IsHiiRsrcShdr(shdr
)) {
308 mCoffAlignment
= (UINT32
)shdr
->sh_addralign
;
313 // Move the PE/COFF header right before the first section. This will help us
314 // save space when converting to TE.
316 if (mCoffAlignment
> mCoffOffset
) {
317 mNtHdrOffset
+= mCoffAlignment
- mCoffOffset
;
318 mTableOffset
+= mCoffAlignment
- mCoffOffset
;
319 mCoffOffset
= mCoffAlignment
;
323 // First text sections.
325 mCoffOffset
= CoffAlign(mCoffOffset
);
326 mTextOffset
= mCoffOffset
;
327 FoundSection
= FALSE
;
329 for (i
= 0; i
< mEhdr
->e_shnum
; i
++) {
330 Elf_Shdr
*shdr
= GetShdrByIndex(i
);
331 if (IsTextShdr(shdr
)) {
332 if ((shdr
->sh_addralign
!= 0) && (shdr
->sh_addralign
!= 1)) {
333 // the alignment field is valid
334 if ((shdr
->sh_addr
& (shdr
->sh_addralign
- 1)) == 0) {
335 // if the section address is aligned we must align PE/COFF
336 mCoffOffset
= (UINT32
) ((mCoffOffset
+ shdr
->sh_addralign
- 1) & ~(shdr
->sh_addralign
- 1));
338 Error (NULL
, 0, 3000, "Invalid", "Section address not aligned to its own alignment.");
342 /* Relocate entry. */
343 if ((mEhdr
->e_entry
>= shdr
->sh_addr
) &&
344 (mEhdr
->e_entry
< shdr
->sh_addr
+ shdr
->sh_size
)) {
345 CoffEntry
= (UINT32
) (mCoffOffset
+ mEhdr
->e_entry
- shdr
->sh_addr
);
349 // Set mTextOffset with the offset of the first '.text' section
352 mTextOffset
= mCoffOffset
;
356 mCoffSectionsOffset
[i
] = mCoffOffset
;
357 mCoffOffset
+= (UINT32
) shdr
->sh_size
;
363 Error (NULL
, 0, 3000, "Invalid", "Did not find any '.text' section.");
367 mDebugOffset
= DebugRvaAlign(mCoffOffset
);
368 mCoffOffset
= CoffAlign(mCoffOffset
);
370 if (SectionCount
> 1 && mOutImageType
== FW_EFI_IMAGE
) {
371 Warning (NULL
, 0, 0, NULL
, "Mulitple sections in %s are merged into 1 text section. Source level debug might not work correctly.", mInImageName
);
375 // Then data sections.
377 mDataOffset
= mCoffOffset
;
378 FoundSection
= FALSE
;
380 for (i
= 0; i
< mEhdr
->e_shnum
; i
++) {
381 Elf_Shdr
*shdr
= GetShdrByIndex(i
);
382 if (IsDataShdr(shdr
)) {
383 if ((shdr
->sh_addralign
!= 0) && (shdr
->sh_addralign
!= 1)) {
384 // the alignment field is valid
385 if ((shdr
->sh_addr
& (shdr
->sh_addralign
- 1)) == 0) {
386 // if the section address is aligned we must align PE/COFF
387 mCoffOffset
= (UINT32
) ((mCoffOffset
+ shdr
->sh_addralign
- 1) & ~(shdr
->sh_addralign
- 1));
389 Error (NULL
, 0, 3000, "Invalid", "Section address not aligned to its own alignment.");
394 // Set mDataOffset with the offset of the first '.data' section
397 mDataOffset
= mCoffOffset
;
400 mCoffSectionsOffset
[i
] = mCoffOffset
;
401 mCoffOffset
+= (UINT32
) shdr
->sh_size
;
407 // Make room for .debug data in .data (or .text if .data is empty) instead of
408 // putting it in a section of its own. This is explicitly allowed by the
409 // PE/COFF spec, and prevents bloat in the binary when using large values for
410 // section alignment.
412 if (SectionCount
> 0) {
413 mDebugOffset
= DebugRvaAlign(mCoffOffset
);
415 mCoffOffset
= mDebugOffset
+ sizeof(EFI_IMAGE_DEBUG_DIRECTORY_ENTRY
) +
416 sizeof(EFI_IMAGE_DEBUG_CODEVIEW_NB10_ENTRY
) +
417 strlen(mInImageName
) + 1;
419 mCoffOffset
= CoffAlign(mCoffOffset
);
420 if (SectionCount
== 0) {
421 mDataOffset
= mCoffOffset
;
424 if (SectionCount
> 1 && mOutImageType
== FW_EFI_IMAGE
) {
425 Warning (NULL
, 0, 0, NULL
, "Mulitple sections in %s are merged into 1 data section. Source level debug might not work correctly.", mInImageName
);
429 // The HII resource sections.
431 mHiiRsrcOffset
= mCoffOffset
;
432 for (i
= 0; i
< mEhdr
->e_shnum
; i
++) {
433 Elf_Shdr
*shdr
= GetShdrByIndex(i
);
434 if (IsHiiRsrcShdr(shdr
)) {
435 if ((shdr
->sh_addralign
!= 0) && (shdr
->sh_addralign
!= 1)) {
436 // the alignment field is valid
437 if ((shdr
->sh_addr
& (shdr
->sh_addralign
- 1)) == 0) {
438 // if the section address is aligned we must align PE/COFF
439 mCoffOffset
= (UINT32
) ((mCoffOffset
+ shdr
->sh_addralign
- 1) & ~(shdr
->sh_addralign
- 1));
441 Error (NULL
, 0, 3000, "Invalid", "Section address not aligned to its own alignment.");
444 if (shdr
->sh_size
!= 0) {
445 mHiiRsrcOffset
= mCoffOffset
;
446 mCoffSectionsOffset
[i
] = mCoffOffset
;
447 mCoffOffset
+= (UINT32
) shdr
->sh_size
;
448 mCoffOffset
= CoffAlign(mCoffOffset
);
449 SetHiiResourceHeader ((UINT8
*) mEhdr
+ shdr
->sh_offset
, mHiiRsrcOffset
);
455 mRelocOffset
= mCoffOffset
;
458 // Allocate base Coff file. Will be expanded later for relocations.
460 mCoffFile
= (UINT8
*)malloc(mCoffOffset
);
461 memset(mCoffFile
, 0, mCoffOffset
);
466 DosHdr
= (EFI_IMAGE_DOS_HEADER
*)mCoffFile
;
467 DosHdr
->e_magic
= EFI_IMAGE_DOS_SIGNATURE
;
468 DosHdr
->e_lfanew
= mNtHdrOffset
;
470 NtHdr
= (EFI_IMAGE_OPTIONAL_HEADER_UNION
*)(mCoffFile
+ mNtHdrOffset
);
472 NtHdr
->Pe32Plus
.Signature
= EFI_IMAGE_NT_SIGNATURE
;
474 switch (mEhdr
->e_machine
) {
476 NtHdr
->Pe32Plus
.FileHeader
.Machine
= EFI_IMAGE_MACHINE_X64
;
477 NtHdr
->Pe32Plus
.OptionalHeader
.Magic
= EFI_IMAGE_NT_OPTIONAL_HDR64_MAGIC
;
480 NtHdr
->Pe32Plus
.FileHeader
.Machine
= EFI_IMAGE_MACHINE_IPF
;
481 NtHdr
->Pe32Plus
.OptionalHeader
.Magic
= EFI_IMAGE_NT_OPTIONAL_HDR64_MAGIC
;
484 NtHdr
->Pe32Plus
.FileHeader
.Machine
= EFI_IMAGE_MACHINE_AARCH64
;
485 NtHdr
->Pe32Plus
.OptionalHeader
.Magic
= EFI_IMAGE_NT_OPTIONAL_HDR64_MAGIC
;
488 VerboseMsg ("%s unknown e_machine type. Assume X64", (UINTN
)mEhdr
->e_machine
);
489 NtHdr
->Pe32Plus
.FileHeader
.Machine
= EFI_IMAGE_MACHINE_X64
;
490 NtHdr
->Pe32Plus
.OptionalHeader
.Magic
= EFI_IMAGE_NT_OPTIONAL_HDR64_MAGIC
;
493 NtHdr
->Pe32Plus
.FileHeader
.NumberOfSections
= mCoffNbrSections
;
494 NtHdr
->Pe32Plus
.FileHeader
.TimeDateStamp
= (UINT32
) time(NULL
);
495 mImageTimeStamp
= NtHdr
->Pe32Plus
.FileHeader
.TimeDateStamp
;
496 NtHdr
->Pe32Plus
.FileHeader
.PointerToSymbolTable
= 0;
497 NtHdr
->Pe32Plus
.FileHeader
.NumberOfSymbols
= 0;
498 NtHdr
->Pe32Plus
.FileHeader
.SizeOfOptionalHeader
= sizeof(NtHdr
->Pe32Plus
.OptionalHeader
);
499 NtHdr
->Pe32Plus
.FileHeader
.Characteristics
= EFI_IMAGE_FILE_EXECUTABLE_IMAGE
500 | EFI_IMAGE_FILE_LINE_NUMS_STRIPPED
501 | EFI_IMAGE_FILE_LOCAL_SYMS_STRIPPED
502 | EFI_IMAGE_FILE_LARGE_ADDRESS_AWARE
;
504 NtHdr
->Pe32Plus
.OptionalHeader
.SizeOfCode
= mDataOffset
- mTextOffset
;
505 NtHdr
->Pe32Plus
.OptionalHeader
.SizeOfInitializedData
= mRelocOffset
- mDataOffset
;
506 NtHdr
->Pe32Plus
.OptionalHeader
.SizeOfUninitializedData
= 0;
507 NtHdr
->Pe32Plus
.OptionalHeader
.AddressOfEntryPoint
= CoffEntry
;
509 NtHdr
->Pe32Plus
.OptionalHeader
.BaseOfCode
= mTextOffset
;
511 NtHdr
->Pe32Plus
.OptionalHeader
.ImageBase
= 0;
512 NtHdr
->Pe32Plus
.OptionalHeader
.SectionAlignment
= mCoffAlignment
;
513 NtHdr
->Pe32Plus
.OptionalHeader
.FileAlignment
= mCoffAlignment
;
514 NtHdr
->Pe32Plus
.OptionalHeader
.SizeOfImage
= 0;
516 NtHdr
->Pe32Plus
.OptionalHeader
.SizeOfHeaders
= mTextOffset
;
517 NtHdr
->Pe32Plus
.OptionalHeader
.NumberOfRvaAndSizes
= EFI_IMAGE_NUMBER_OF_DIRECTORY_ENTRIES
;
522 if ((mDataOffset
- mTextOffset
) > 0) {
523 CreateSectionHeader (".text", mTextOffset
, mDataOffset
- mTextOffset
,
524 EFI_IMAGE_SCN_CNT_CODE
525 | EFI_IMAGE_SCN_MEM_EXECUTE
526 | EFI_IMAGE_SCN_MEM_READ
);
528 // Don't make a section of size 0.
529 NtHdr
->Pe32Plus
.FileHeader
.NumberOfSections
--;
532 if ((mHiiRsrcOffset
- mDataOffset
) > 0) {
533 CreateSectionHeader (".data", mDataOffset
, mHiiRsrcOffset
- mDataOffset
,
534 EFI_IMAGE_SCN_CNT_INITIALIZED_DATA
535 | EFI_IMAGE_SCN_MEM_WRITE
536 | EFI_IMAGE_SCN_MEM_READ
);
538 // Don't make a section of size 0.
539 NtHdr
->Pe32Plus
.FileHeader
.NumberOfSections
--;
542 if ((mRelocOffset
- mHiiRsrcOffset
) > 0) {
543 CreateSectionHeader (".rsrc", mHiiRsrcOffset
, mRelocOffset
- mHiiRsrcOffset
,
544 EFI_IMAGE_SCN_CNT_INITIALIZED_DATA
545 | EFI_IMAGE_SCN_MEM_READ
);
547 NtHdr
->Pe32Plus
.OptionalHeader
.DataDirectory
[EFI_IMAGE_DIRECTORY_ENTRY_RESOURCE
].Size
= mRelocOffset
- mHiiRsrcOffset
;
548 NtHdr
->Pe32Plus
.OptionalHeader
.DataDirectory
[EFI_IMAGE_DIRECTORY_ENTRY_RESOURCE
].VirtualAddress
= mHiiRsrcOffset
;
550 // Don't make a section of size 0.
551 NtHdr
->Pe32Plus
.FileHeader
.NumberOfSections
--;
559 SECTION_FILTER_TYPES FilterType
565 BOOLEAN (*Filter
)(Elf_Shdr
*);
568 // Initialize filter pointer
570 switch (FilterType
) {
575 Filter
= IsHiiRsrcShdr
;
585 // First: copy sections.
587 for (Idx
= 0; Idx
< mEhdr
->e_shnum
; Idx
++) {
588 Elf_Shdr
*Shdr
= GetShdrByIndex(Idx
);
589 if ((*Filter
)(Shdr
)) {
590 switch (Shdr
->sh_type
) {
593 memcpy(mCoffFile
+ mCoffSectionsOffset
[Idx
],
594 (UINT8
*)mEhdr
+ Shdr
->sh_offset
,
595 (size_t) Shdr
->sh_size
);
599 memset(mCoffFile
+ mCoffSectionsOffset
[Idx
], 0, (size_t) Shdr
->sh_size
);
604 // Ignore for unkown section type.
606 VerboseMsg ("%s unknown section type %x. We directly copy this section into Coff file", mInImageName
, (unsigned)Shdr
->sh_type
);
613 // Second: apply relocations.
615 VerboseMsg ("Applying Relocations...");
616 for (Idx
= 0; Idx
< mEhdr
->e_shnum
; Idx
++) {
618 // Determine if this is a relocation section.
620 Elf_Shdr
*RelShdr
= GetShdrByIndex(Idx
);
621 if ((RelShdr
->sh_type
!= SHT_REL
) && (RelShdr
->sh_type
!= SHT_RELA
)) {
626 // Relocation section found. Now extract section information that the relocations
627 // apply to in the ELF data and the new COFF data.
629 SecShdr
= GetShdrByIndex(RelShdr
->sh_info
);
630 SecOffset
= mCoffSectionsOffset
[RelShdr
->sh_info
];
633 // Only process relocations for the current filter type.
635 if (RelShdr
->sh_type
== SHT_RELA
&& (*Filter
)(SecShdr
)) {
639 // Determine the symbol table referenced by the relocation data.
641 Elf_Shdr
*SymtabShdr
= GetShdrByIndex(RelShdr
->sh_link
);
642 UINT8
*Symtab
= (UINT8
*)mEhdr
+ SymtabShdr
->sh_offset
;
645 // Process all relocation entries for this section.
647 for (RelIdx
= 0; RelIdx
< RelShdr
->sh_size
; RelIdx
+= (UINT32
) RelShdr
->sh_entsize
) {
650 // Set pointer to relocation entry
652 Elf_Rela
*Rel
= (Elf_Rela
*)((UINT8
*)mEhdr
+ RelShdr
->sh_offset
+ RelIdx
);
655 // Set pointer to symbol table entry associated with the relocation entry.
657 Elf_Sym
*Sym
= (Elf_Sym
*)(Symtab
+ ELF_R_SYM(Rel
->r_info
) * SymtabShdr
->sh_entsize
);
663 // Check section header index found in symbol table and get the section
666 if (Sym
->st_shndx
== SHN_UNDEF
667 || Sym
->st_shndx
== SHN_ABS
668 || Sym
->st_shndx
> mEhdr
->e_shnum
) {
669 Error (NULL
, 0, 3000, "Invalid", "%s bad symbol definition.", mInImageName
);
671 SymShdr
= GetShdrByIndex(Sym
->st_shndx
);
674 // Convert the relocation data to a pointer into the coff file.
677 // r_offset is the virtual address of the storage unit to be relocated.
678 // sh_addr is the virtual address for the base of the section.
680 // r_offset in a memory address.
681 // Convert it to a pointer in the coff file.
683 Targ
= mCoffFile
+ SecOffset
+ (Rel
->r_offset
- SecShdr
->sh_addr
);
686 // Determine how to handle each relocation type based on the machine type.
688 if (mEhdr
->e_machine
== EM_X86_64
) {
689 switch (ELF_R_TYPE(Rel
->r_info
)) {
694 // Absolute relocation.
696 VerboseMsg ("R_X86_64_64");
697 VerboseMsg ("Offset: 0x%08X, Addend: 0x%016LX",
698 (UINT32
)(SecOffset
+ (Rel
->r_offset
- SecShdr
->sh_addr
)),
700 *(UINT64
*)Targ
= *(UINT64
*)Targ
- SymShdr
->sh_addr
+ mCoffSectionsOffset
[Sym
->st_shndx
];
701 VerboseMsg ("Relocation: 0x%016LX", *(UINT64
*)Targ
);
704 VerboseMsg ("R_X86_64_32");
705 VerboseMsg ("Offset: 0x%08X, Addend: 0x%08X",
706 (UINT32
)(SecOffset
+ (Rel
->r_offset
- SecShdr
->sh_addr
)),
708 *(UINT32
*)Targ
= (UINT32
)((UINT64
)(*(UINT32
*)Targ
) - SymShdr
->sh_addr
+ mCoffSectionsOffset
[Sym
->st_shndx
]);
709 VerboseMsg ("Relocation: 0x%08X", *(UINT32
*)Targ
);
712 VerboseMsg ("R_X86_64_32S");
713 VerboseMsg ("Offset: 0x%08X, Addend: 0x%08X",
714 (UINT32
)(SecOffset
+ (Rel
->r_offset
- SecShdr
->sh_addr
)),
716 *(INT32
*)Targ
= (INT32
)((INT64
)(*(INT32
*)Targ
) - SymShdr
->sh_addr
+ mCoffSectionsOffset
[Sym
->st_shndx
]);
717 VerboseMsg ("Relocation: 0x%08X", *(UINT32
*)Targ
);
721 // Relative relocation: Symbol - Ip + Addend
723 VerboseMsg ("R_X86_64_PC32");
724 VerboseMsg ("Offset: 0x%08X, Addend: 0x%08X",
725 (UINT32
)(SecOffset
+ (Rel
->r_offset
- SecShdr
->sh_addr
)),
727 *(UINT32
*)Targ
= (UINT32
) (*(UINT32
*)Targ
728 + (mCoffSectionsOffset
[Sym
->st_shndx
] - SymShdr
->sh_addr
)
729 - (SecOffset
- SecShdr
->sh_addr
));
730 VerboseMsg ("Relocation: 0x%08X", *(UINT32
*)Targ
);
733 Error (NULL
, 0, 3000, "Invalid", "%s unsupported ELF EM_X86_64 relocation 0x%x.", mInImageName
, (unsigned) ELF_R_TYPE(Rel
->r_info
));
735 } else if (mEhdr
->e_machine
== EM_AARCH64
) {
737 switch (ELF_R_TYPE(Rel
->r_info
)) {
739 case R_AARCH64_ADR_PREL_PG_HI21
:
740 case R_AARCH64_ADD_ABS_LO12_NC
:
741 case R_AARCH64_LDST8_ABS_LO12_NC
:
742 case R_AARCH64_LDST16_ABS_LO12_NC
:
743 case R_AARCH64_LDST32_ABS_LO12_NC
:
744 case R_AARCH64_LDST64_ABS_LO12_NC
:
745 case R_AARCH64_LDST128_ABS_LO12_NC
:
747 // AArch64 PG_H21 relocations are typically paired with ABS_LO12
748 // relocations, where a PC-relative reference with +/- 4 GB range is
749 // split into a relative high part and an absolute low part. Since
750 // the absolute low part represents the offset into a 4 KB page, we
751 // have to make sure that the 4 KB relative offsets of both the
752 // section containing the reference as well as the section to which
753 // it refers have not been changed during PE/COFF conversion (i.e.,
754 // in ScanSections64() above).
756 if (((SecShdr
->sh_addr
^ SecOffset
) & 0xfff) != 0 ||
757 ((SymShdr
->sh_addr
^ mCoffSectionsOffset
[Sym
->st_shndx
]) & 0xfff) != 0 ||
758 mCoffAlignment
< 0x1000) {
759 Error (NULL
, 0, 3000, "Invalid", "WriteSections64(): %s AARCH64 small code model requires 4 KB section alignment.",
765 case R_AARCH64_ADR_PREL_LO21
:
766 case R_AARCH64_CONDBR19
:
767 case R_AARCH64_LD_PREL_LO19
:
768 case R_AARCH64_CALL26
:
769 case R_AARCH64_JUMP26
:
771 // The GCC toolchains (i.e., binutils) may corrupt section relative
772 // relocations when emitting relocation sections into fully linked
773 // binaries. More specifically, they tend to fail to take into
774 // account the fact that a '.rodata + XXX' relocation needs to have
775 // its addend recalculated once .rodata is merged into the .text
776 // section, and the relocation emitted into the .rela.text section.
778 // We cannot really recover from this loss of information, so the
779 // only workaround is to prevent having to recalculate any relative
780 // relocations at all, by using a linker script that ensures that
781 // the offset between the Place and the Symbol is the same in both
782 // the ELF and the PE/COFF versions of the binary.
784 if ((SymShdr
->sh_addr
- SecShdr
->sh_addr
) !=
785 (mCoffSectionsOffset
[Sym
->st_shndx
] - SecOffset
)) {
786 Error (NULL
, 0, 3000, "Invalid", "WriteSections64(): %s AARCH64 relative relocations require identical ELF and PE/COFF section offsets",
791 // Absolute relocations.
792 case R_AARCH64_ABS64
:
793 *(UINT64
*)Targ
= *(UINT64
*)Targ
- SymShdr
->sh_addr
+ mCoffSectionsOffset
[Sym
->st_shndx
];
797 Error (NULL
, 0, 3000, "Invalid", "WriteSections64(): %s unsupported ELF EM_AARCH64 relocation 0x%x.", mInImageName
, (unsigned) ELF_R_TYPE(Rel
->r_info
));
800 Error (NULL
, 0, 3000, "Invalid", "Not a supported machine type");
816 EFI_IMAGE_OPTIONAL_HEADER_UNION
*NtHdr
;
817 EFI_IMAGE_DATA_DIRECTORY
*Dir
;
819 for (Index
= 0; Index
< mEhdr
->e_shnum
; Index
++) {
820 Elf_Shdr
*RelShdr
= GetShdrByIndex(Index
);
821 if ((RelShdr
->sh_type
== SHT_REL
) || (RelShdr
->sh_type
== SHT_RELA
)) {
822 Elf_Shdr
*SecShdr
= GetShdrByIndex (RelShdr
->sh_info
);
823 if (IsTextShdr(SecShdr
) || IsDataShdr(SecShdr
)) {
826 for (RelIdx
= 0; RelIdx
< RelShdr
->sh_size
; RelIdx
+= RelShdr
->sh_entsize
) {
827 Elf_Rela
*Rel
= (Elf_Rela
*)((UINT8
*)mEhdr
+ RelShdr
->sh_offset
+ RelIdx
);
829 if (mEhdr
->e_machine
== EM_X86_64
) {
830 switch (ELF_R_TYPE(Rel
->r_info
)) {
835 VerboseMsg ("EFI_IMAGE_REL_BASED_DIR64 Offset: 0x%08X",
836 mCoffSectionsOffset
[RelShdr
->sh_info
] + (Rel
->r_offset
- SecShdr
->sh_addr
));
838 (UINT32
) ((UINT64
) mCoffSectionsOffset
[RelShdr
->sh_info
]
839 + (Rel
->r_offset
- SecShdr
->sh_addr
)),
840 EFI_IMAGE_REL_BASED_DIR64
);
844 VerboseMsg ("EFI_IMAGE_REL_BASED_HIGHLOW Offset: 0x%08X",
845 mCoffSectionsOffset
[RelShdr
->sh_info
] + (Rel
->r_offset
- SecShdr
->sh_addr
));
847 (UINT32
) ((UINT64
) mCoffSectionsOffset
[RelShdr
->sh_info
]
848 + (Rel
->r_offset
- SecShdr
->sh_addr
)),
849 EFI_IMAGE_REL_BASED_HIGHLOW
);
852 Error (NULL
, 0, 3000, "Invalid", "%s unsupported ELF EM_X86_64 relocation 0x%x.", mInImageName
, (unsigned) ELF_R_TYPE(Rel
->r_info
));
854 } else if (mEhdr
->e_machine
== EM_AARCH64
) {
856 switch (ELF_R_TYPE(Rel
->r_info
)) {
857 case R_AARCH64_ADR_PREL_LO21
:
860 case R_AARCH64_CONDBR19
:
863 case R_AARCH64_LD_PREL_LO19
:
866 case R_AARCH64_CALL26
:
869 case R_AARCH64_JUMP26
:
872 case R_AARCH64_ADR_PREL_PG_HI21
:
873 case R_AARCH64_ADD_ABS_LO12_NC
:
874 case R_AARCH64_LDST8_ABS_LO12_NC
:
875 case R_AARCH64_LDST16_ABS_LO12_NC
:
876 case R_AARCH64_LDST32_ABS_LO12_NC
:
877 case R_AARCH64_LDST64_ABS_LO12_NC
:
878 case R_AARCH64_LDST128_ABS_LO12_NC
:
881 case R_AARCH64_ABS64
:
883 (UINT32
) ((UINT64
) mCoffSectionsOffset
[RelShdr
->sh_info
]
884 + (Rel
->r_offset
- SecShdr
->sh_addr
)),
885 EFI_IMAGE_REL_BASED_DIR64
);
888 case R_AARCH64_ABS32
:
890 (UINT32
) ((UINT64
) mCoffSectionsOffset
[RelShdr
->sh_info
]
891 + (Rel
->r_offset
- SecShdr
->sh_addr
)),
892 EFI_IMAGE_REL_BASED_HIGHLOW
);
896 Error (NULL
, 0, 3000, "Invalid", "WriteRelocations64(): %s unsupported ELF EM_AARCH64 relocation 0x%x.", mInImageName
, (unsigned) ELF_R_TYPE(Rel
->r_info
));
899 Error (NULL
, 0, 3000, "Not Supported", "This tool does not support relocations for ELF with e_machine %u (processor type).", (unsigned) mEhdr
->e_machine
);
907 // Pad by adding empty entries.
909 while (mCoffOffset
& (mCoffAlignment
- 1)) {
910 CoffAddFixupEntry(0);
913 NtHdr
= (EFI_IMAGE_OPTIONAL_HEADER_UNION
*)(mCoffFile
+ mNtHdrOffset
);
914 Dir
= &NtHdr
->Pe32Plus
.OptionalHeader
.DataDirectory
[EFI_IMAGE_DIRECTORY_ENTRY_BASERELOC
];
915 Dir
->Size
= mCoffOffset
- mRelocOffset
;
916 if (Dir
->Size
== 0) {
917 // If no relocations, null out the directory entry and don't add the .reloc section
918 Dir
->VirtualAddress
= 0;
919 NtHdr
->Pe32Plus
.FileHeader
.NumberOfSections
--;
921 Dir
->VirtualAddress
= mRelocOffset
;
922 CreateSectionHeader (".reloc", mRelocOffset
, mCoffOffset
- mRelocOffset
,
923 EFI_IMAGE_SCN_CNT_INITIALIZED_DATA
924 | EFI_IMAGE_SCN_MEM_DISCARDABLE
925 | EFI_IMAGE_SCN_MEM_READ
);
936 EFI_IMAGE_OPTIONAL_HEADER_UNION
*NtHdr
;
937 EFI_IMAGE_DATA_DIRECTORY
*DataDir
;
938 EFI_IMAGE_DEBUG_DIRECTORY_ENTRY
*Dir
;
939 EFI_IMAGE_DEBUG_CODEVIEW_NB10_ENTRY
*Nb10
;
941 Len
= strlen(mInImageName
) + 1;
943 Dir
= (EFI_IMAGE_DEBUG_DIRECTORY_ENTRY
*)(mCoffFile
+ mDebugOffset
);
944 Dir
->Type
= EFI_IMAGE_DEBUG_TYPE_CODEVIEW
;
945 Dir
->SizeOfData
= sizeof(EFI_IMAGE_DEBUG_CODEVIEW_NB10_ENTRY
) + Len
;
946 Dir
->RVA
= mDebugOffset
+ sizeof(EFI_IMAGE_DEBUG_DIRECTORY_ENTRY
);
947 Dir
->FileOffset
= mDebugOffset
+ sizeof(EFI_IMAGE_DEBUG_DIRECTORY_ENTRY
);
949 Nb10
= (EFI_IMAGE_DEBUG_CODEVIEW_NB10_ENTRY
*)(Dir
+ 1);
950 Nb10
->Signature
= CODEVIEW_SIGNATURE_NB10
;
951 strcpy ((char *)(Nb10
+ 1), mInImageName
);
954 NtHdr
= (EFI_IMAGE_OPTIONAL_HEADER_UNION
*)(mCoffFile
+ mNtHdrOffset
);
955 DataDir
= &NtHdr
->Pe32Plus
.OptionalHeader
.DataDirectory
[EFI_IMAGE_DIRECTORY_ENTRY_DEBUG
];
956 DataDir
->VirtualAddress
= mDebugOffset
;
957 DataDir
->Size
= Dir
->SizeOfData
+ sizeof(EFI_IMAGE_DEBUG_DIRECTORY_ENTRY
);
966 EFI_IMAGE_OPTIONAL_HEADER_UNION
*NtHdr
;
971 NtHdr
= (EFI_IMAGE_OPTIONAL_HEADER_UNION
*)(mCoffFile
+ mNtHdrOffset
);
972 NtHdr
->Pe32Plus
.OptionalHeader
.SizeOfImage
= mCoffOffset
;
981 if (mCoffSectionsOffset
!= NULL
) {
982 free (mCoffSectionsOffset
);