4 Copyright (c) 2010 - 2014, Intel Corporation. All rights reserved.<BR>
5 Portions copyright (c) 2013, 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 "Elf32Convert.h"
49 SECTION_FILTER_TYPES FilterType
77 // Rename ELF32 strucutres to common names to help when porting to ELF64.
79 typedef Elf32_Shdr Elf_Shdr
;
80 typedef Elf32_Ehdr Elf_Ehdr
;
81 typedef Elf32_Rel Elf_Rel
;
82 typedef Elf32_Sym Elf_Sym
;
83 typedef Elf32_Phdr Elf_Phdr
;
84 typedef Elf32_Dyn Elf_Dyn
;
85 #define ELFCLASS ELFCLASS32
86 #define ELF_R_TYPE(r) ELF32_R_TYPE(r)
87 #define ELF_R_SYM(r) ELF32_R_SYM(r)
90 // Well known ELF structures.
92 STATIC Elf_Ehdr
*mEhdr
;
93 STATIC Elf_Shdr
*mShdrBase
;
94 STATIC Elf_Phdr
*mPhdrBase
;
99 STATIC UINT32 mCoffAlignment
= 0x20;
102 // PE section alignment.
104 STATIC
const UINT16 mCoffNbrSections
= 4;
107 // ELF sections to offset in Coff file.
109 STATIC UINT32
*mCoffSectionsOffset
= NULL
;
112 // Offsets in COFF file
114 STATIC UINT32 mNtHdrOffset
;
115 STATIC UINT32 mTextOffset
;
116 STATIC UINT32 mDataOffset
;
117 STATIC UINT32 mHiiRsrcOffset
;
118 STATIC UINT32 mRelocOffset
;
119 STATIC UINT32 mDebugOffset
;
122 // Initialization Function
127 ELF_FUNCTION_TABLE
*ElfFunctions
131 // Initialize data pointer and structures.
133 mEhdr
= (Elf_Ehdr
*) FileBuffer
;
136 // Check the ELF32 specific header information.
138 if (mEhdr
->e_ident
[EI_CLASS
] != ELFCLASS32
) {
139 Error (NULL
, 0, 3000, "Unsupported", "ELF EI_DATA not ELFCLASS32");
142 if (mEhdr
->e_ident
[EI_DATA
] != ELFDATA2LSB
) {
143 Error (NULL
, 0, 3000, "Unsupported", "ELF EI_DATA not ELFDATA2LSB");
146 if ((mEhdr
->e_type
!= ET_EXEC
) && (mEhdr
->e_type
!= ET_DYN
)) {
147 Error (NULL
, 0, 3000, "Unsupported", "ELF e_type not ET_EXEC or ET_DYN");
150 if (!((mEhdr
->e_machine
== EM_386
) || (mEhdr
->e_machine
== EM_ARM
))) {
151 Error (NULL
, 0, 3000, "Unsupported", "ELF e_machine not EM_386 or EM_ARM");
154 if (mEhdr
->e_version
!= EV_CURRENT
) {
155 Error (NULL
, 0, 3000, "Unsupported", "ELF e_version (%u) not EV_CURRENT (%d)", (unsigned) mEhdr
->e_version
, EV_CURRENT
);
160 // Update section header pointers
162 mShdrBase
= (Elf_Shdr
*)((UINT8
*)mEhdr
+ mEhdr
->e_shoff
);
163 mPhdrBase
= (Elf_Phdr
*)((UINT8
*)mEhdr
+ mEhdr
->e_phoff
);
166 // Create COFF Section offset buffer and zero.
168 mCoffSectionsOffset
= (UINT32
*)malloc(mEhdr
->e_shnum
* sizeof (UINT32
));
169 memset(mCoffSectionsOffset
, 0, mEhdr
->e_shnum
* sizeof(UINT32
));
172 // Fill in function pointers.
174 ElfFunctions
->ScanSections
= ScanSections32
;
175 ElfFunctions
->WriteSections
= WriteSections32
;
176 ElfFunctions
->WriteRelocations
= WriteRelocations32
;
177 ElfFunctions
->WriteDebug
= WriteDebug32
;
178 ElfFunctions
->SetImageSize
= SetImageSize32
;
179 ElfFunctions
->CleanUp
= CleanUp32
;
186 // Header by Index functions
194 if (Num
>= mEhdr
->e_shnum
)
196 return (Elf_Shdr
*)((UINT8
*)mShdrBase
+ Num
* mEhdr
->e_shentsize
);
205 if (num
>= mEhdr
->e_phnum
) {
209 return (Elf_Phdr
*)((UINT8
*)mPhdrBase
+ num
* mEhdr
->e_phentsize
);
218 return (Offset
+ mCoffAlignment
- 1) & ~(mCoffAlignment
- 1);
230 return (BOOLEAN
) ((Shdr
->sh_flags
& (SHF_WRITE
| SHF_ALLOC
)) == SHF_ALLOC
);
239 Elf_Shdr
*Namedr
= GetShdrByIndex(mEhdr
->e_shstrndx
);
241 return (BOOLEAN
) (strcmp((CHAR8
*)mEhdr
+ Namedr
->sh_offset
+ Shdr
->sh_name
, ELF_HII_SECTION_NAME
) == 0);
250 if (IsHiiRsrcShdr(Shdr
)) {
253 return (BOOLEAN
) (Shdr
->sh_flags
& (SHF_WRITE
| SHF_ALLOC
)) == (SHF_ALLOC
| SHF_WRITE
);
257 // Elf functions interface implementation
267 EFI_IMAGE_DOS_HEADER
*DosHdr
;
268 EFI_IMAGE_OPTIONAL_HEADER_UNION
*NtHdr
;
271 BOOLEAN FoundSection
;
277 // Coff file start with a DOS header.
279 mCoffOffset
= sizeof(EFI_IMAGE_DOS_HEADER
) + 0x40;
280 mNtHdrOffset
= mCoffOffset
;
281 switch (mEhdr
->e_machine
) {
284 mCoffOffset
+= sizeof (EFI_IMAGE_NT_HEADERS32
);
287 VerboseMsg ("%s unknown e_machine type. Assume IA-32", (UINTN
)mEhdr
->e_machine
);
288 mCoffOffset
+= sizeof (EFI_IMAGE_NT_HEADERS32
);
292 mTableOffset
= mCoffOffset
;
293 mCoffOffset
+= mCoffNbrSections
* sizeof(EFI_IMAGE_SECTION_HEADER
);
296 // Set mCoffAlignment to the maximum alignment of the input sections
299 for (i
= 0; i
< mEhdr
->e_shnum
; i
++) {
300 Elf_Shdr
*shdr
= GetShdrByIndex(i
);
301 if (shdr
->sh_addralign
<= mCoffAlignment
) {
304 if (IsTextShdr(shdr
) || IsDataShdr(shdr
) || IsHiiRsrcShdr(shdr
)) {
305 mCoffAlignment
= (UINT32
)shdr
->sh_addralign
;
310 // First text sections.
312 mCoffOffset
= CoffAlign(mCoffOffset
);
313 mTextOffset
= mCoffOffset
;
314 FoundSection
= FALSE
;
316 for (i
= 0; i
< mEhdr
->e_shnum
; i
++) {
317 Elf_Shdr
*shdr
= GetShdrByIndex(i
);
318 if (IsTextShdr(shdr
)) {
319 if ((shdr
->sh_addralign
!= 0) && (shdr
->sh_addralign
!= 1)) {
320 // the alignment field is valid
321 if ((shdr
->sh_addr
& (shdr
->sh_addralign
- 1)) == 0) {
322 // if the section address is aligned we must align PE/COFF
323 mCoffOffset
= (mCoffOffset
+ shdr
->sh_addralign
- 1) & ~(shdr
->sh_addralign
- 1);
324 } else if ((shdr
->sh_addr
% shdr
->sh_addralign
) != (mCoffOffset
% shdr
->sh_addralign
)) {
325 // ARM RVCT tools have behavior outside of the ELF specification to try
326 // and make images smaller. If sh_addr is not aligned to sh_addralign
327 // then the section needs to preserve sh_addr MOD sh_addralign.
328 // Normally doing nothing here works great.
329 Error (NULL
, 0, 3000, "Invalid", "Unsupported section alignment.");
333 /* Relocate entry. */
334 if ((mEhdr
->e_entry
>= shdr
->sh_addr
) &&
335 (mEhdr
->e_entry
< shdr
->sh_addr
+ shdr
->sh_size
)) {
336 CoffEntry
= mCoffOffset
+ mEhdr
->e_entry
- shdr
->sh_addr
;
340 // Set mTextOffset with the offset of the first '.text' section
343 mTextOffset
= mCoffOffset
;
347 mCoffSectionsOffset
[i
] = mCoffOffset
;
348 mCoffOffset
+= shdr
->sh_size
;
354 Error (NULL
, 0, 3000, "Invalid", "Did not find any '.text' section.");
358 mDebugOffset
= mCoffOffset
;
360 if (mEhdr
->e_machine
!= EM_ARM
) {
361 mCoffOffset
= CoffAlign(mCoffOffset
);
364 if (SectionCount
> 1 && mOutImageType
== FW_EFI_IMAGE
) {
365 Warning (NULL
, 0, 0, NULL
, "Mulitple sections in %s are merged into 1 text section. Source level debug might not work correctly.", mInImageName
);
369 // Then data sections.
371 mDataOffset
= mCoffOffset
;
372 FoundSection
= FALSE
;
374 for (i
= 0; i
< mEhdr
->e_shnum
; i
++) {
375 Elf_Shdr
*shdr
= GetShdrByIndex(i
);
376 if (IsDataShdr(shdr
)) {
377 if ((shdr
->sh_addralign
!= 0) && (shdr
->sh_addralign
!= 1)) {
378 // the alignment field is valid
379 if ((shdr
->sh_addr
& (shdr
->sh_addralign
- 1)) == 0) {
380 // if the section address is aligned we must align PE/COFF
381 mCoffOffset
= (mCoffOffset
+ shdr
->sh_addralign
- 1) & ~(shdr
->sh_addralign
- 1);
382 } else if ((shdr
->sh_addr
% shdr
->sh_addralign
) != (mCoffOffset
% shdr
->sh_addralign
)) {
383 // ARM RVCT tools have behavior outside of the ELF specification to try
384 // and make images smaller. If sh_addr is not aligned to sh_addralign
385 // then the section needs to preserve sh_addr MOD sh_addralign.
386 // Normally doing nothing here works great.
387 Error (NULL
, 0, 3000, "Invalid", "Unsupported section alignment.");
392 // Set mDataOffset with the offset of the first '.data' section
395 mDataOffset
= mCoffOffset
;
399 mCoffSectionsOffset
[i
] = mCoffOffset
;
400 mCoffOffset
+= shdr
->sh_size
;
405 if (SectionCount
> 1 && mOutImageType
== FW_EFI_IMAGE
) {
406 Warning (NULL
, 0, 0, NULL
, "Mulitple sections in %s are merged into 1 data section. Source level debug might not work correctly.", mInImageName
);
410 // Make room for .debug data in .data (or .text if .data is empty) instead of
411 // putting it in a section of its own. This is explicitly allowed by the
412 // PE/COFF spec, and prevents bloat in the binary when using large values for
413 // section alignment.
415 if (SectionCount
> 0) {
416 mDebugOffset
= mCoffOffset
;
418 mCoffOffset
= mDebugOffset
+ sizeof(EFI_IMAGE_DEBUG_DIRECTORY_ENTRY
) +
419 sizeof(EFI_IMAGE_DEBUG_CODEVIEW_NB10_ENTRY
) +
420 strlen(mInImageName
) + 1;
422 mCoffOffset
= CoffAlign(mCoffOffset
);
423 if (SectionCount
== 0) {
424 mDataOffset
= mCoffOffset
;
428 // The HII resource sections.
430 mHiiRsrcOffset
= mCoffOffset
;
431 for (i
= 0; i
< mEhdr
->e_shnum
; i
++) {
432 Elf_Shdr
*shdr
= GetShdrByIndex(i
);
433 if (IsHiiRsrcShdr(shdr
)) {
434 if ((shdr
->sh_addralign
!= 0) && (shdr
->sh_addralign
!= 1)) {
435 // the alignment field is valid
436 if ((shdr
->sh_addr
& (shdr
->sh_addralign
- 1)) == 0) {
437 // if the section address is aligned we must align PE/COFF
438 mCoffOffset
= (mCoffOffset
+ shdr
->sh_addralign
- 1) & ~(shdr
->sh_addralign
- 1);
439 } else if ((shdr
->sh_addr
% shdr
->sh_addralign
) != (mCoffOffset
% shdr
->sh_addralign
)) {
440 // ARM RVCT tools have behavior outside of the ELF specification to try
441 // and make images smaller. If sh_addr is not aligned to sh_addralign
442 // then the section needs to preserve sh_addr MOD sh_addralign.
443 // Normally doing nothing here works great.
444 Error (NULL
, 0, 3000, "Invalid", "Unsupported section alignment.");
447 if (shdr
->sh_size
!= 0) {
448 mHiiRsrcOffset
= mCoffOffset
;
449 mCoffSectionsOffset
[i
] = mCoffOffset
;
450 mCoffOffset
+= shdr
->sh_size
;
451 mCoffOffset
= CoffAlign(mCoffOffset
);
452 SetHiiResourceHeader ((UINT8
*) mEhdr
+ shdr
->sh_offset
, mHiiRsrcOffset
);
458 mRelocOffset
= mCoffOffset
;
461 // Allocate base Coff file. Will be expanded later for relocations.
463 mCoffFile
= (UINT8
*)malloc(mCoffOffset
);
464 memset(mCoffFile
, 0, mCoffOffset
);
469 DosHdr
= (EFI_IMAGE_DOS_HEADER
*)mCoffFile
;
470 DosHdr
->e_magic
= EFI_IMAGE_DOS_SIGNATURE
;
471 DosHdr
->e_lfanew
= mNtHdrOffset
;
473 NtHdr
= (EFI_IMAGE_OPTIONAL_HEADER_UNION
*)(mCoffFile
+ mNtHdrOffset
);
475 NtHdr
->Pe32
.Signature
= EFI_IMAGE_NT_SIGNATURE
;
477 switch (mEhdr
->e_machine
) {
479 NtHdr
->Pe32
.FileHeader
.Machine
= EFI_IMAGE_MACHINE_IA32
;
480 NtHdr
->Pe32
.OptionalHeader
.Magic
= EFI_IMAGE_NT_OPTIONAL_HDR32_MAGIC
;
483 NtHdr
->Pe32
.FileHeader
.Machine
= EFI_IMAGE_MACHINE_ARMT
;
484 NtHdr
->Pe32
.OptionalHeader
.Magic
= EFI_IMAGE_NT_OPTIONAL_HDR32_MAGIC
;
487 VerboseMsg ("%s unknown e_machine type. Assume IA-32", (UINTN
)mEhdr
->e_machine
);
488 NtHdr
->Pe32
.FileHeader
.Machine
= EFI_IMAGE_MACHINE_IA32
;
489 NtHdr
->Pe32
.OptionalHeader
.Magic
= EFI_IMAGE_NT_OPTIONAL_HDR32_MAGIC
;
492 NtHdr
->Pe32
.FileHeader
.NumberOfSections
= mCoffNbrSections
;
493 NtHdr
->Pe32
.FileHeader
.TimeDateStamp
= (UINT32
) time(NULL
);
494 mImageTimeStamp
= NtHdr
->Pe32
.FileHeader
.TimeDateStamp
;
495 NtHdr
->Pe32
.FileHeader
.PointerToSymbolTable
= 0;
496 NtHdr
->Pe32
.FileHeader
.NumberOfSymbols
= 0;
497 NtHdr
->Pe32
.FileHeader
.SizeOfOptionalHeader
= sizeof(NtHdr
->Pe32
.OptionalHeader
);
498 NtHdr
->Pe32
.FileHeader
.Characteristics
= EFI_IMAGE_FILE_EXECUTABLE_IMAGE
499 | EFI_IMAGE_FILE_LINE_NUMS_STRIPPED
500 | EFI_IMAGE_FILE_LOCAL_SYMS_STRIPPED
501 | EFI_IMAGE_FILE_32BIT_MACHINE
;
503 NtHdr
->Pe32
.OptionalHeader
.SizeOfCode
= mDataOffset
- mTextOffset
;
504 NtHdr
->Pe32
.OptionalHeader
.SizeOfInitializedData
= mRelocOffset
- mDataOffset
;
505 NtHdr
->Pe32
.OptionalHeader
.SizeOfUninitializedData
= 0;
506 NtHdr
->Pe32
.OptionalHeader
.AddressOfEntryPoint
= CoffEntry
;
508 NtHdr
->Pe32
.OptionalHeader
.BaseOfCode
= mTextOffset
;
510 NtHdr
->Pe32
.OptionalHeader
.BaseOfData
= mDataOffset
;
511 NtHdr
->Pe32
.OptionalHeader
.ImageBase
= 0;
512 NtHdr
->Pe32
.OptionalHeader
.SectionAlignment
= mCoffAlignment
;
513 NtHdr
->Pe32
.OptionalHeader
.FileAlignment
= mCoffAlignment
;
514 NtHdr
->Pe32
.OptionalHeader
.SizeOfImage
= 0;
516 NtHdr
->Pe32
.OptionalHeader
.SizeOfHeaders
= mTextOffset
;
517 NtHdr
->Pe32
.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
->Pe32
.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
->Pe32
.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
->Pe32
.OptionalHeader
.DataDirectory
[EFI_IMAGE_DIRECTORY_ENTRY_RESOURCE
].Size
= mRelocOffset
- mHiiRsrcOffset
;
548 NtHdr
->Pe32
.OptionalHeader
.DataDirectory
[EFI_IMAGE_DIRECTORY_ENTRY_RESOURCE
].VirtualAddress
= mHiiRsrcOffset
;
550 // Don't make a section of size 0.
551 NtHdr
->Pe32
.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
,
599 memset(mCoffFile
+ mCoffSectionsOffset
[Idx
], 0, 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 for (Idx
= 0; Idx
< mEhdr
->e_shnum
; Idx
++) {
617 // Determine if this is a relocation section.
619 Elf_Shdr
*RelShdr
= GetShdrByIndex(Idx
);
620 if ((RelShdr
->sh_type
!= SHT_REL
) && (RelShdr
->sh_type
!= SHT_RELA
)) {
625 // Relocation section found. Now extract section information that the relocations
626 // apply to in the ELF data and the new COFF data.
628 SecShdr
= GetShdrByIndex(RelShdr
->sh_info
);
629 SecOffset
= mCoffSectionsOffset
[RelShdr
->sh_info
];
632 // Only process relocations for the current filter type.
634 if (RelShdr
->sh_type
== SHT_REL
&& (*Filter
)(SecShdr
)) {
638 // Determine the symbol table referenced by the relocation data.
640 Elf_Shdr
*SymtabShdr
= GetShdrByIndex(RelShdr
->sh_link
);
641 UINT8
*Symtab
= (UINT8
*)mEhdr
+ SymtabShdr
->sh_offset
;
644 // Process all relocation entries for this section.
646 for (RelOffset
= 0; RelOffset
< RelShdr
->sh_size
; RelOffset
+= RelShdr
->sh_entsize
) {
648 // Set pointer to relocation entry
650 Elf_Rel
*Rel
= (Elf_Rel
*)((UINT8
*)mEhdr
+ RelShdr
->sh_offset
+ RelOffset
);
653 // Set pointer to symbol table entry associated with the relocation entry.
655 Elf_Sym
*Sym
= (Elf_Sym
*)(Symtab
+ ELF_R_SYM(Rel
->r_info
) * SymtabShdr
->sh_entsize
);
662 // Check section header index found in symbol table and get the section
665 if (Sym
->st_shndx
== SHN_UNDEF
666 || Sym
->st_shndx
== SHN_ABS
667 || Sym
->st_shndx
> mEhdr
->e_shnum
) {
668 Error (NULL
, 0, 3000, "Invalid", "%s bad symbol definition.", mInImageName
);
670 SymShdr
= GetShdrByIndex(Sym
->st_shndx
);
673 // Convert the relocation data to a pointer into the coff file.
676 // r_offset is the virtual address of the storage unit to be relocated.
677 // sh_addr is the virtual address for the base of the section.
679 Targ
= mCoffFile
+ SecOffset
+ (Rel
->r_offset
- SecShdr
->sh_addr
);
682 // Determine how to handle each relocation type based on the machine type.
684 if (mEhdr
->e_machine
== EM_386
) {
685 switch (ELF_R_TYPE(Rel
->r_info
)) {
690 // Absolute relocation.
691 // Converts Targ from a absolute virtual address to the absolute
694 *(UINT32
*)Targ
= *(UINT32
*)Targ
- SymShdr
->sh_addr
695 + mCoffSectionsOffset
[Sym
->st_shndx
];
699 // Relative relocation: Symbol - Ip + Addend
701 *(UINT32
*)Targ
= *(UINT32
*)Targ
702 + (mCoffSectionsOffset
[Sym
->st_shndx
] - SymShdr
->sh_addr
)
703 - (SecOffset
- SecShdr
->sh_addr
);
706 Error (NULL
, 0, 3000, "Invalid", "%s unsupported ELF EM_386 relocation 0x%x.", mInImageName
, (unsigned) ELF_R_TYPE(Rel
->r_info
));
708 } else if (mEhdr
->e_machine
== EM_ARM
) {
709 switch (ELF32_R_TYPE(Rel
->r_info
)) {
711 // No relocation - no action required
717 case R_ARM_THM_JUMP19
:
720 case R_ARM_THM_JUMP24
:
722 case R_ARM_MOVW_PREL_NC
:
723 case R_ARM_MOVT_PREL
:
724 case R_ARM_THM_MOVW_PREL_NC
:
725 case R_ARM_THM_MOVT_PREL
:
727 case R_ARM_THM_ALU_PREL_11_0
:
729 case R_ARM_REL32_NOI
:
730 case R_ARM_ALU_PC_G0_NC
:
731 case R_ARM_ALU_PC_G0
:
732 case R_ARM_ALU_PC_G1_NC
:
733 case R_ARM_ALU_PC_G1
:
734 case R_ARM_ALU_PC_G2
:
735 case R_ARM_LDR_PC_G1
:
736 case R_ARM_LDR_PC_G2
:
737 case R_ARM_LDRS_PC_G0
:
738 case R_ARM_LDRS_PC_G1
:
739 case R_ARM_LDRS_PC_G2
:
740 case R_ARM_LDC_PC_G0
:
741 case R_ARM_LDC_PC_G1
:
742 case R_ARM_LDC_PC_G2
:
744 case R_ARM_THM_JUMP11
:
745 case R_ARM_THM_JUMP8
:
747 case R_ARM_TLS_LDM32
:
749 // Thease are all PC-relative relocations and don't require modification
750 // GCC does not seem to have the concept of a application that just needs to get relocated.
753 case R_ARM_THM_MOVW_ABS_NC
:
754 // MOVW is only lower 16-bits of the addres
755 Address
= (UINT16
)(Sym
->st_value
- SymShdr
->sh_addr
+ mCoffSectionsOffset
[Sym
->st_shndx
]);
756 ThumbMovtImmediatePatch ((UINT16
*)Targ
, Address
);
759 case R_ARM_THM_MOVT_ABS
:
760 // MOVT is only upper 16-bits of the addres
761 Address
= (UINT16
)((Sym
->st_value
- SymShdr
->sh_addr
+ mCoffSectionsOffset
[Sym
->st_shndx
]) >> 16);
762 ThumbMovtImmediatePatch ((UINT16
*)Targ
, Address
);
768 // Absolute relocation.
770 *(UINT32
*)Targ
= *(UINT32
*)Targ
- SymShdr
->sh_addr
+ mCoffSectionsOffset
[Sym
->st_shndx
];
774 Error (NULL
, 0, 3000, "Invalid", "WriteSections (): %s unsupported ELF EM_ARM relocation 0x%x.", mInImageName
, (unsigned) ELF32_R_TYPE(Rel
->r_info
));
784 UINTN gMovwOffset
= 0;
793 EFI_IMAGE_OPTIONAL_HEADER_UNION
*NtHdr
;
794 EFI_IMAGE_DATA_DIRECTORY
*Dir
;
795 BOOLEAN FoundRelocations
;
798 UINTN RelElementSize
;
803 Elf32_Phdr
*DynamicSegment
;
804 Elf32_Phdr
*TargetSegment
;
806 for (Index
= 0, FoundRelocations
= FALSE
; Index
< mEhdr
->e_shnum
; Index
++) {
807 Elf_Shdr
*RelShdr
= GetShdrByIndex(Index
);
808 if ((RelShdr
->sh_type
== SHT_REL
) || (RelShdr
->sh_type
== SHT_RELA
)) {
809 Elf_Shdr
*SecShdr
= GetShdrByIndex (RelShdr
->sh_info
);
810 if (IsTextShdr(SecShdr
) || IsDataShdr(SecShdr
)) {
813 FoundRelocations
= TRUE
;
814 for (RelIdx
= 0; RelIdx
< RelShdr
->sh_size
; RelIdx
+= RelShdr
->sh_entsize
) {
815 Elf_Rel
*Rel
= (Elf_Rel
*)((UINT8
*)mEhdr
+ RelShdr
->sh_offset
+ RelIdx
);
817 if (mEhdr
->e_machine
== EM_386
) {
818 switch (ELF_R_TYPE(Rel
->r_info
)) {
822 // No fixup entry required.
827 // Creates a relative relocation entry from the absolute entry.
829 CoffAddFixup(mCoffSectionsOffset
[RelShdr
->sh_info
]
830 + (Rel
->r_offset
- SecShdr
->sh_addr
),
831 EFI_IMAGE_REL_BASED_HIGHLOW
);
834 Error (NULL
, 0, 3000, "Invalid", "%s unsupported ELF EM_386 relocation 0x%x.", mInImageName
, (unsigned) ELF_R_TYPE(Rel
->r_info
));
836 } else if (mEhdr
->e_machine
== EM_ARM
) {
837 switch (ELF32_R_TYPE(Rel
->r_info
)) {
839 // No relocation - no action required
845 case R_ARM_THM_JUMP19
:
848 case R_ARM_THM_JUMP24
:
850 case R_ARM_MOVW_PREL_NC
:
851 case R_ARM_MOVT_PREL
:
852 case R_ARM_THM_MOVW_PREL_NC
:
853 case R_ARM_THM_MOVT_PREL
:
855 case R_ARM_THM_ALU_PREL_11_0
:
857 case R_ARM_REL32_NOI
:
858 case R_ARM_ALU_PC_G0_NC
:
859 case R_ARM_ALU_PC_G0
:
860 case R_ARM_ALU_PC_G1_NC
:
861 case R_ARM_ALU_PC_G1
:
862 case R_ARM_ALU_PC_G2
:
863 case R_ARM_LDR_PC_G1
:
864 case R_ARM_LDR_PC_G2
:
865 case R_ARM_LDRS_PC_G0
:
866 case R_ARM_LDRS_PC_G1
:
867 case R_ARM_LDRS_PC_G2
:
868 case R_ARM_LDC_PC_G0
:
869 case R_ARM_LDC_PC_G1
:
870 case R_ARM_LDC_PC_G2
:
872 case R_ARM_THM_JUMP11
:
873 case R_ARM_THM_JUMP8
:
875 case R_ARM_TLS_LDM32
:
877 // Thease are all PC-relative relocations and don't require modification
880 case R_ARM_THM_MOVW_ABS_NC
:
882 mCoffSectionsOffset
[RelShdr
->sh_info
]
883 + (Rel
->r_offset
- SecShdr
->sh_addr
),
884 EFI_IMAGE_REL_BASED_ARM_MOV32T
887 // PE/COFF treats MOVW/MOVT relocation as single 64-bit instruction
888 // Track this address so we can log an error for unsupported sequence of MOVW/MOVT
889 gMovwOffset
= mCoffSectionsOffset
[RelShdr
->sh_info
] + (Rel
->r_offset
- SecShdr
->sh_addr
);
892 case R_ARM_THM_MOVT_ABS
:
893 if ((gMovwOffset
+ 4) != (mCoffSectionsOffset
[RelShdr
->sh_info
] + (Rel
->r_offset
- SecShdr
->sh_addr
))) {
894 Error (NULL
, 0, 3000, "Not Supported", "PE/COFF requires MOVW+MOVT instruction sequence %x +4 != %x.", gMovwOffset
, mCoffSectionsOffset
[RelShdr
->sh_info
] + (Rel
->r_offset
- SecShdr
->sh_addr
));
901 mCoffSectionsOffset
[RelShdr
->sh_info
]
902 + (Rel
->r_offset
- SecShdr
->sh_addr
),
903 EFI_IMAGE_REL_BASED_HIGHLOW
908 Error (NULL
, 0, 3000, "Invalid", "WriteRelocations(): %s unsupported ELF EM_ARM relocation 0x%x.", mInImageName
, (unsigned) ELF32_R_TYPE(Rel
->r_info
));
911 Error (NULL
, 0, 3000, "Not Supported", "This tool does not support relocations for ELF with e_machine %u (processor type).", (unsigned) mEhdr
->e_machine
);
918 if (!FoundRelocations
&& (mEhdr
->e_machine
== EM_ARM
)) {
919 /* Try again, but look for PT_DYNAMIC instead of SHT_REL */
921 for (Index
= 0; Index
< mEhdr
->e_phnum
; Index
++) {
926 DynamicSegment
= GetPhdrByIndex (Index
);
928 if (DynamicSegment
->p_type
== PT_DYNAMIC
) {
929 Dyn
= (Elf32_Dyn
*) ((UINT8
*)mEhdr
+ DynamicSegment
->p_offset
);
931 while (Dyn
->d_tag
!= DT_NULL
) {
932 switch (Dyn
->d_tag
) {
934 RelOffset
= Dyn
->d_un
.d_val
;
938 RelSize
= Dyn
->d_un
.d_val
;
942 RelElementSize
= Dyn
->d_un
.d_val
;
950 if (( RelOffset
== 0 ) || ( RelSize
== 0 ) || ( RelElementSize
== 0 )) {
951 Error (NULL
, 0, 3000, "Invalid", "%s bad ARM dynamic relocations.", mInImageName
);
954 for (K
= 0; K
< RelSize
; K
+= RelElementSize
) {
956 if (DynamicSegment
->p_paddr
== 0) {
957 // Older versions of the ARM ELF (SWS ESPC 0003 B-02) specification define DT_REL
958 // as an offset in the dynamic segment. p_paddr is defined to be zero for ARM tools
959 Rel
= (Elf32_Rel
*) ((UINT8
*) mEhdr
+ DynamicSegment
->p_offset
+ RelOffset
+ K
);
961 // This is how it reads in the generic ELF specification
962 Rel
= (Elf32_Rel
*) ((UINT8
*) mEhdr
+ RelOffset
+ K
);
965 switch (ELF32_R_TYPE (Rel
->r_info
)) {
970 TargetSegment
= GetPhdrByIndex (ELF32_R_SYM (Rel
->r_info
) - 1);
972 // Note: r_offset in a memory address. Convert it to a pointer in the coff file.
973 Targ
= mCoffFile
+ mCoffSectionsOffset
[ ELF32_R_SYM( Rel
->r_info
) ] + Rel
->r_offset
- TargetSegment
->p_vaddr
;
975 *(UINT32
*)Targ
= *(UINT32
*)Targ
+ mCoffSectionsOffset
[ELF32_R_SYM( Rel
->r_info
)];
977 CoffAddFixup (mCoffSectionsOffset
[ELF32_R_SYM (Rel
->r_info
)] + (Rel
->r_offset
- TargetSegment
->p_vaddr
), EFI_IMAGE_REL_BASED_HIGHLOW
);
981 Error (NULL
, 0, 3000, "Invalid", "%s bad ARM dynamic relocations, unkown type %d.", mInImageName
, ELF32_R_TYPE (Rel
->r_info
));
991 // Pad by adding empty entries.
993 while (mCoffOffset
& (mCoffAlignment
- 1)) {
994 CoffAddFixupEntry(0);
997 NtHdr
= (EFI_IMAGE_OPTIONAL_HEADER_UNION
*)(mCoffFile
+ mNtHdrOffset
);
998 Dir
= &NtHdr
->Pe32
.OptionalHeader
.DataDirectory
[EFI_IMAGE_DIRECTORY_ENTRY_BASERELOC
];
999 Dir
->Size
= mCoffOffset
- mRelocOffset
;
1000 if (Dir
->Size
== 0) {
1001 // If no relocations, null out the directory entry and don't add the .reloc section
1002 Dir
->VirtualAddress
= 0;
1003 NtHdr
->Pe32
.FileHeader
.NumberOfSections
--;
1005 Dir
->VirtualAddress
= mRelocOffset
;
1006 CreateSectionHeader (".reloc", mRelocOffset
, mCoffOffset
- mRelocOffset
,
1007 EFI_IMAGE_SCN_CNT_INITIALIZED_DATA
1008 | EFI_IMAGE_SCN_MEM_DISCARDABLE
1009 | EFI_IMAGE_SCN_MEM_READ
);
1021 EFI_IMAGE_OPTIONAL_HEADER_UNION
*NtHdr
;
1022 EFI_IMAGE_DATA_DIRECTORY
*DataDir
;
1023 EFI_IMAGE_DEBUG_DIRECTORY_ENTRY
*Dir
;
1024 EFI_IMAGE_DEBUG_CODEVIEW_NB10_ENTRY
*Nb10
;
1026 Len
= strlen(mInImageName
) + 1;
1028 Dir
= (EFI_IMAGE_DEBUG_DIRECTORY_ENTRY
*)(mCoffFile
+ mDebugOffset
);
1029 Dir
->Type
= EFI_IMAGE_DEBUG_TYPE_CODEVIEW
;
1030 Dir
->SizeOfData
= sizeof(EFI_IMAGE_DEBUG_CODEVIEW_NB10_ENTRY
) + Len
;
1031 Dir
->RVA
= mDebugOffset
+ sizeof(EFI_IMAGE_DEBUG_DIRECTORY_ENTRY
);
1032 Dir
->FileOffset
= mDebugOffset
+ sizeof(EFI_IMAGE_DEBUG_DIRECTORY_ENTRY
);
1034 Nb10
= (EFI_IMAGE_DEBUG_CODEVIEW_NB10_ENTRY
*)(Dir
+ 1);
1035 Nb10
->Signature
= CODEVIEW_SIGNATURE_NB10
;
1036 strcpy ((char *)(Nb10
+ 1), mInImageName
);
1039 NtHdr
= (EFI_IMAGE_OPTIONAL_HEADER_UNION
*)(mCoffFile
+ mNtHdrOffset
);
1040 DataDir
= &NtHdr
->Pe32
.OptionalHeader
.DataDirectory
[EFI_IMAGE_DIRECTORY_ENTRY_DEBUG
];
1041 DataDir
->VirtualAddress
= mDebugOffset
;
1042 DataDir
->Size
= Dir
->SizeOfData
+ sizeof(EFI_IMAGE_DEBUG_DIRECTORY_ENTRY
);
1051 EFI_IMAGE_OPTIONAL_HEADER_UNION
*NtHdr
;
1056 NtHdr
= (EFI_IMAGE_OPTIONAL_HEADER_UNION
*)(mCoffFile
+ mNtHdrOffset
);
1057 NtHdr
->Pe32
.OptionalHeader
.SizeOfImage
= mCoffOffset
;
1066 if (mCoffSectionsOffset
!= NULL
) {
1067 free (mCoffSectionsOffset
);