VOID
CVfrErrorHandle::PrintMsg (
IN UINT32 LineNum,
IN CHAR8 *TokName,
IN CONST CHAR8 *MsgType,
IN CONST CHAR8 *ErrorMsg
)
{
CHAR8 *FileName = NULL;
UINT32 FileLine;
if (strncmp ("Warning", MsgType, strlen ("Warning")) == 0) {
VerboseMsg ((CHAR8 *) ErrorMsg);
return;
}
GetFileNameLineNum (LineNum, &FileName, &FileLine);
Error (FileName, FileLine, 0x3000, TokName, (CHAR8 *) "\t%s\n", (CHAR8 *) ErrorMsg);
}
STATIC
VOID
ScanSections32 (
VOID
)
{
UINT32 i;
EFI_IMAGE_DOS_HEADER *DosHdr;
EFI_IMAGE_OPTIONAL_HEADER_UNION *NtHdr;
UINT32 CoffEntry;
UINT32 SectionCount;
BOOLEAN FoundSection;
CoffEntry = 0;
mCoffOffset = 0;
//
// Coff file start with a DOS header.
//
mCoffOffset = sizeof(EFI_IMAGE_DOS_HEADER) + 0x40;
mNtHdrOffset = mCoffOffset;
switch (mEhdr->e_machine) {
case EM_386:
case EM_ARM:
mCoffOffset += sizeof (EFI_IMAGE_NT_HEADERS32);
break;
default:
VerboseMsg ("%s unknown e_machine type. Assume IA-32", (UINTN)mEhdr->e_machine);
mCoffOffset += sizeof (EFI_IMAGE_NT_HEADERS32);
break;
}
mTableOffset = mCoffOffset;
mCoffOffset += mCoffNbrSections * sizeof(EFI_IMAGE_SECTION_HEADER);
//
// First text sections.
//
mCoffOffset = CoffAlign(mCoffOffset);
mTextOffset = mCoffOffset;
FoundSection = FALSE;
SectionCount = 0;
for (i = 0; i < mEhdr->e_shnum; i++) {
Elf_Shdr *shdr = GetShdrByIndex(i);
if (IsTextShdr(shdr)) {
if ((shdr->sh_addralign != 0) && (shdr->sh_addralign != 1)) {
// the alignment field is valid
if ((shdr->sh_addr & (shdr->sh_addralign - 1)) == 0) {
// if the section address is aligned we must align PE/COFF
mCoffOffset = (mCoffOffset + shdr->sh_addralign - 1) & ~(shdr->sh_addralign - 1);
} else if ((shdr->sh_addr % shdr->sh_addralign) != (mCoffOffset % shdr->sh_addralign)) {
// ARM RVCT tools have behavior outside of the ELF specification to try
// and make images smaller. If sh_addr is not aligned to sh_addralign
// then the section needs to preserve sh_addr MOD sh_addralign.
// Normally doing nothing here works great.
Error (NULL, 0, 3000, "Invalid", "Unsupported section alignment.");
}
}
/* Relocate entry. */
if ((mEhdr->e_entry >= shdr->sh_addr) &&
(mEhdr->e_entry < shdr->sh_addr + shdr->sh_size)) {
CoffEntry = mCoffOffset + mEhdr->e_entry - shdr->sh_addr;
}
//
// Set mTextOffset with the offset of the first '.text' section
//
if (!FoundSection) {
mTextOffset = mCoffOffset;
FoundSection = TRUE;
}
mCoffSectionsOffset[i] = mCoffOffset;
mCoffOffset += shdr->sh_size;
SectionCount ++;
}
}
if (!FoundSection) {
Error (NULL, 0, 3000, "Invalid", "Did not find any '.text' section.");
assert (FALSE);
}
if (mEhdr->e_machine != EM_ARM) {
mCoffOffset = CoffAlign(mCoffOffset);
}
if (SectionCount > 1 && mOutImageType == FW_EFI_IMAGE) {
Warning (NULL, 0, 0, NULL, "Mulitple sections in %s are merged into 1 text section. Source level debug might not work correctly.", mInImageName);
}
//
// Then data sections.
//
mDataOffset = mCoffOffset;
FoundSection = FALSE;
SectionCount = 0;
for (i = 0; i < mEhdr->e_shnum; i++) {
Elf_Shdr *shdr = GetShdrByIndex(i);
if (IsDataShdr(shdr)) {
if ((shdr->sh_addralign != 0) && (shdr->sh_addralign != 1)) {
// the alignment field is valid
if ((shdr->sh_addr & (shdr->sh_addralign - 1)) == 0) {
// if the section address is aligned we must align PE/COFF
mCoffOffset = (mCoffOffset + shdr->sh_addralign - 1) & ~(shdr->sh_addralign - 1);
} else if ((shdr->sh_addr % shdr->sh_addralign) != (mCoffOffset % shdr->sh_addralign)) {
// ARM RVCT tools have behavior outside of the ELF specification to try
// and make images smaller. If sh_addr is not aligned to sh_addralign
// then the section needs to preserve sh_addr MOD sh_addralign.
// Normally doing nothing here works great.
Error (NULL, 0, 3000, "Invalid", "Unsupported section alignment.");
}
}
//
// Set mDataOffset with the offset of the first '.data' section
//
if (!FoundSection) {
mDataOffset = mCoffOffset;
FoundSection = TRUE;
}
mCoffSectionsOffset[i] = mCoffOffset;
mCoffOffset += shdr->sh_size;
SectionCount ++;
}
}
mCoffOffset = CoffAlign(mCoffOffset);
if (SectionCount > 1 && mOutImageType == FW_EFI_IMAGE) {
Warning (NULL, 0, 0, NULL, "Mulitple sections in %s are merged into 1 data section. Source level debug might not work correctly.", mInImageName);
}
//
// The HII resource sections.
//
mHiiRsrcOffset = mCoffOffset;
for (i = 0; i < mEhdr->e_shnum; i++) {
Elf_Shdr *shdr = GetShdrByIndex(i);
if (IsHiiRsrcShdr(shdr)) {
if ((shdr->sh_addralign != 0) && (shdr->sh_addralign != 1)) {
// the alignment field is valid
if ((shdr->sh_addr & (shdr->sh_addralign - 1)) == 0) {
// if the section address is aligned we must align PE/COFF
mCoffOffset = (mCoffOffset + shdr->sh_addralign - 1) & ~(shdr->sh_addralign - 1);
} else if ((shdr->sh_addr % shdr->sh_addralign) != (mCoffOffset % shdr->sh_addralign)) {
// ARM RVCT tools have behavior outside of the ELF specification to try
// and make images smaller. If sh_addr is not aligned to sh_addralign
// then the section needs to preserve sh_addr MOD sh_addralign.
// Normally doing nothing here works great.
Error (NULL, 0, 3000, "Invalid", "Unsupported section alignment.");
}
}
if (shdr->sh_size != 0) {
mHiiRsrcOffset = mCoffOffset;
mCoffSectionsOffset[i] = mCoffOffset;
mCoffOffset += shdr->sh_size;
mCoffOffset = CoffAlign(mCoffOffset);
SetHiiResourceHeader ((UINT8*) mEhdr + shdr->sh_offset, mHiiRsrcOffset);
}
break;
}
}
mRelocOffset = mCoffOffset;
//
// Allocate base Coff file. Will be expanded later for relocations.
//
mCoffFile = (UINT8 *)malloc(mCoffOffset);
memset(mCoffFile, 0, mCoffOffset);
//
// Fill headers.
//
DosHdr = (EFI_IMAGE_DOS_HEADER *)mCoffFile;
DosHdr->e_magic = EFI_IMAGE_DOS_SIGNATURE;
DosHdr->e_lfanew = mNtHdrOffset;
NtHdr = (EFI_IMAGE_OPTIONAL_HEADER_UNION*)(mCoffFile + mNtHdrOffset);
NtHdr->Pe32.Signature = EFI_IMAGE_NT_SIGNATURE;
switch (mEhdr->e_machine) {
case EM_386:
NtHdr->Pe32.FileHeader.Machine = EFI_IMAGE_MACHINE_IA32;
NtHdr->Pe32.OptionalHeader.Magic = EFI_IMAGE_NT_OPTIONAL_HDR32_MAGIC;
break;
case EM_ARM:
NtHdr->Pe32.FileHeader.Machine = EFI_IMAGE_MACHINE_ARMT;
NtHdr->Pe32.OptionalHeader.Magic = EFI_IMAGE_NT_OPTIONAL_HDR32_MAGIC;
break;
default:
VerboseMsg ("%s unknown e_machine type. Assume IA-32", (UINTN)mEhdr->e_machine);
NtHdr->Pe32.FileHeader.Machine = EFI_IMAGE_MACHINE_IA32;
NtHdr->Pe32.OptionalHeader.Magic = EFI_IMAGE_NT_OPTIONAL_HDR32_MAGIC;
}
NtHdr->Pe32.FileHeader.NumberOfSections = mCoffNbrSections;
NtHdr->Pe32.FileHeader.TimeDateStamp = (UINT32) time(NULL);
mImageTimeStamp = NtHdr->Pe32.FileHeader.TimeDateStamp;
NtHdr->Pe32.FileHeader.PointerToSymbolTable = 0;
NtHdr->Pe32.FileHeader.NumberOfSymbols = 0;
NtHdr->Pe32.FileHeader.SizeOfOptionalHeader = sizeof(NtHdr->Pe32.OptionalHeader);
NtHdr->Pe32.FileHeader.Characteristics = EFI_IMAGE_FILE_EXECUTABLE_IMAGE
| EFI_IMAGE_FILE_LINE_NUMS_STRIPPED
| EFI_IMAGE_FILE_LOCAL_SYMS_STRIPPED
| EFI_IMAGE_FILE_32BIT_MACHINE;
NtHdr->Pe32.OptionalHeader.SizeOfCode = mDataOffset - mTextOffset;
NtHdr->Pe32.OptionalHeader.SizeOfInitializedData = mRelocOffset - mDataOffset;
NtHdr->Pe32.OptionalHeader.SizeOfUninitializedData = 0;
NtHdr->Pe32.OptionalHeader.AddressOfEntryPoint = CoffEntry;
NtHdr->Pe32.OptionalHeader.BaseOfCode = mTextOffset;
NtHdr->Pe32.OptionalHeader.BaseOfData = mDataOffset;
NtHdr->Pe32.OptionalHeader.ImageBase = 0;
NtHdr->Pe32.OptionalHeader.SectionAlignment = mCoffAlignment;
NtHdr->Pe32.OptionalHeader.FileAlignment = mCoffAlignment;
NtHdr->Pe32.OptionalHeader.SizeOfImage = 0;
NtHdr->Pe32.OptionalHeader.SizeOfHeaders = mTextOffset;
NtHdr->Pe32.OptionalHeader.NumberOfRvaAndSizes = EFI_IMAGE_NUMBER_OF_DIRECTORY_ENTRIES;
//
// Section headers.
//
if ((mDataOffset - mTextOffset) > 0) {
CreateSectionHeader (".text", mTextOffset, mDataOffset - mTextOffset,
EFI_IMAGE_SCN_CNT_CODE
| EFI_IMAGE_SCN_MEM_EXECUTE
| EFI_IMAGE_SCN_MEM_READ);
} else {
// Don't make a section of size 0.
NtHdr->Pe32.FileHeader.NumberOfSections--;
}
if ((mHiiRsrcOffset - mDataOffset) > 0) {
CreateSectionHeader (".data", mDataOffset, mHiiRsrcOffset - mDataOffset,
EFI_IMAGE_SCN_CNT_INITIALIZED_DATA
| EFI_IMAGE_SCN_MEM_WRITE
| EFI_IMAGE_SCN_MEM_READ);
} else {
// Don't make a section of size 0.
NtHdr->Pe32.FileHeader.NumberOfSections--;
}
if ((mRelocOffset - mHiiRsrcOffset) > 0) {
CreateSectionHeader (".rsrc", mHiiRsrcOffset, mRelocOffset - mHiiRsrcOffset,
EFI_IMAGE_SCN_CNT_INITIALIZED_DATA
| EFI_IMAGE_SCN_MEM_READ);
NtHdr->Pe32.OptionalHeader.DataDirectory[EFI_IMAGE_DIRECTORY_ENTRY_RESOURCE].Size = mRelocOffset - mHiiRsrcOffset;
NtHdr->Pe32.OptionalHeader.DataDirectory[EFI_IMAGE_DIRECTORY_ENTRY_RESOURCE].VirtualAddress = mHiiRsrcOffset;
} else {
// Don't make a section of size 0.
NtHdr->Pe32.FileHeader.NumberOfSections--;
}
}
STATIC
BOOLEAN
WriteSections32 (
SECTION_FILTER_TYPES FilterType
)
{
UINT32 Idx;
Elf_Shdr *SecShdr;
UINT32 SecOffset;
BOOLEAN (*Filter)(Elf_Shdr *);
//
// Initialize filter pointer
//
switch (FilterType) {
case SECTION_TEXT:
Filter = IsTextShdr;
break;
case SECTION_HII:
Filter = IsHiiRsrcShdr;
break;
case SECTION_DATA:
Filter = IsDataShdr;
break;
default:
return FALSE;
}
//
// First: copy sections.
//
for (Idx = 0; Idx < mEhdr->e_shnum; Idx++) {
Elf_Shdr *Shdr = GetShdrByIndex(Idx);
if ((*Filter)(Shdr)) {
switch (Shdr->sh_type) {
case SHT_PROGBITS:
/* Copy. */
memcpy(mCoffFile + mCoffSectionsOffset[Idx],
(UINT8*)mEhdr + Shdr->sh_offset,
Shdr->sh_size);
break;
case SHT_NOBITS:
memset(mCoffFile + mCoffSectionsOffset[Idx], 0, Shdr->sh_size);
break;
default:
//
// Ignore for unkown section type.
//
VerboseMsg ("%s unknown section type %x. We directly copy this section into Coff file", mInImageName, (unsigned)Shdr->sh_type);
break;
}
}
}
//
// Second: apply relocations.
//
for (Idx = 0; Idx < mEhdr->e_shnum; Idx++) {
//
// Determine if this is a relocation section.
//
Elf_Shdr *RelShdr = GetShdrByIndex(Idx);
if ((RelShdr->sh_type != SHT_REL) && (RelShdr->sh_type != SHT_RELA)) {
continue;
}
//
// Relocation section found. Now extract section information that the relocations
// apply to in the ELF data and the new COFF data.
//
SecShdr = GetShdrByIndex(RelShdr->sh_info);
SecOffset = mCoffSectionsOffset[RelShdr->sh_info];
//
// Only process relocations for the current filter type.
//
if (RelShdr->sh_type == SHT_REL && (*Filter)(SecShdr)) {
UINT32 RelOffset;
//
// Determine the symbol table referenced by the relocation data.
//
Elf_Shdr *SymtabShdr = GetShdrByIndex(RelShdr->sh_link);
UINT8 *Symtab = (UINT8*)mEhdr + SymtabShdr->sh_offset;
//
// Process all relocation entries for this section.
//
for (RelOffset = 0; RelOffset < RelShdr->sh_size; RelOffset += RelShdr->sh_entsize) {
//
// Set pointer to relocation entry
//
Elf_Rel *Rel = (Elf_Rel *)((UINT8*)mEhdr + RelShdr->sh_offset + RelOffset);
//
// Set pointer to symbol table entry associated with the relocation entry.
//
Elf_Sym *Sym = (Elf_Sym *)(Symtab + ELF_R_SYM(Rel->r_info) * SymtabShdr->sh_entsize);
Elf_Shdr *SymShdr;
UINT8 *Targ;
UINT16 Address;
//
// Check section header index found in symbol table and get the section
// header location.
//
if (Sym->st_shndx == SHN_UNDEF
|| Sym->st_shndx == SHN_ABS
|| Sym->st_shndx > mEhdr->e_shnum) {
Error (NULL, 0, 3000, "Invalid", "%s bad symbol definition.", mInImageName);
}
SymShdr = GetShdrByIndex(Sym->st_shndx);
//
// Convert the relocation data to a pointer into the coff file.
//
// Note:
// r_offset is the virtual address of the storage unit to be relocated.
// sh_addr is the virtual address for the base of the section.
//
Targ = mCoffFile + SecOffset + (Rel->r_offset - SecShdr->sh_addr);
//
// Determine how to handle each relocation type based on the machine type.
//
if (mEhdr->e_machine == EM_386) {
switch (ELF_R_TYPE(Rel->r_info)) {
case R_386_NONE:
break;
case R_386_32:
//
// Absolute relocation.
// Converts Targ from a absolute virtual address to the absolute
// COFF address.
//
*(UINT32 *)Targ = *(UINT32 *)Targ - SymShdr->sh_addr
+ mCoffSectionsOffset[Sym->st_shndx];
break;
case R_386_PC32:
//
// Relative relocation: Symbol - Ip + Addend
//
*(UINT32 *)Targ = *(UINT32 *)Targ
+ (mCoffSectionsOffset[Sym->st_shndx] - SymShdr->sh_addr)
- (SecOffset - SecShdr->sh_addr);
break;
default:
Error (NULL, 0, 3000, "Invalid", "%s unsupported ELF EM_386 relocation 0x%x.", mInImageName, (unsigned) ELF_R_TYPE(Rel->r_info));
}
} else if (mEhdr->e_machine == EM_ARM) {
switch (ELF32_R_TYPE(Rel->r_info)) {
case R_ARM_RBASE:
// No relocation - no action required
// break skipped
case R_ARM_PC24:
case R_ARM_XPC25:
case R_ARM_THM_PC22:
case R_ARM_THM_JUMP19:
case R_ARM_CALL:
case R_ARM_JMP24:
case R_ARM_THM_JUMP24:
case R_ARM_PREL31:
case R_ARM_MOVW_PREL_NC:
case R_ARM_MOVT_PREL:
case R_ARM_THM_MOVW_PREL_NC:
case R_ARM_THM_MOVT_PREL:
case R_ARM_THM_JMP6:
case R_ARM_THM_ALU_PREL_11_0:
case R_ARM_THM_PC12:
case R_ARM_REL32_NOI:
case R_ARM_ALU_PC_G0_NC:
case R_ARM_ALU_PC_G0:
case R_ARM_ALU_PC_G1_NC:
case R_ARM_ALU_PC_G1:
case R_ARM_ALU_PC_G2:
case R_ARM_LDR_PC_G1:
case R_ARM_LDR_PC_G2:
case R_ARM_LDRS_PC_G0:
case R_ARM_LDRS_PC_G1:
case R_ARM_LDRS_PC_G2:
case R_ARM_LDC_PC_G0:
case R_ARM_LDC_PC_G1:
case R_ARM_LDC_PC_G2:
case R_ARM_GOT_PREL:
case R_ARM_THM_JUMP11:
case R_ARM_THM_JUMP8:
case R_ARM_TLS_GD32:
case R_ARM_TLS_LDM32:
case R_ARM_TLS_IE32:
// Thease are all PC-relative relocations and don't require modification
// GCC does not seem to have the concept of a application that just needs to get relocated.
break;
case R_ARM_THM_MOVW_ABS_NC:
// MOVW is only lower 16-bits of the addres
Address = (UINT16)(Sym->st_value - SymShdr->sh_addr + mCoffSectionsOffset[Sym->st_shndx]);
ThumbMovtImmediatePatch ((UINT16 *)Targ, Address);
break;
case R_ARM_THM_MOVT_ABS:
// MOVT is only upper 16-bits of the addres
Address = (UINT16)((Sym->st_value - SymShdr->sh_addr + mCoffSectionsOffset[Sym->st_shndx]) >> 16);
ThumbMovtImmediatePatch ((UINT16 *)Targ, Address);
break;
case R_ARM_ABS32:
case R_ARM_RABS32:
//
// Absolute relocation.
//
*(UINT32 *)Targ = *(UINT32 *)Targ - SymShdr->sh_addr + mCoffSectionsOffset[Sym->st_shndx];
break;
default:
Error (NULL, 0, 3000, "Invalid", "WriteSections (): %s unsupported ELF EM_ARM relocation 0x%x.", mInImageName, (unsigned) ELF32_R_TYPE(Rel->r_info));
}
}
}
}
}
STATIC
VOID
WriteRelocations64 (
VOID
)
{
UINT32 Index;
EFI_IMAGE_OPTIONAL_HEADER_UNION *NtHdr;
EFI_IMAGE_DATA_DIRECTORY *Dir;
for (Index = 0; Index < mEhdr->e_shnum; Index++) {
Elf_Shdr *RelShdr = GetShdrByIndex(Index);
if ((RelShdr->sh_type == SHT_REL) || (RelShdr->sh_type == SHT_RELA)) {
Elf_Shdr *SecShdr = GetShdrByIndex (RelShdr->sh_info);
if (IsTextShdr(SecShdr) || IsDataShdr(SecShdr)) {
UINT64 RelIdx;
for (RelIdx = 0; RelIdx < RelShdr->sh_size; RelIdx += RelShdr->sh_entsize) {
Elf_Rela *Rel = (Elf_Rela *)((UINT8*)mEhdr + RelShdr->sh_offset + RelIdx);
if (mEhdr->e_machine == EM_X86_64) {
switch (ELF_R_TYPE(Rel->r_info)) {
case R_X86_64_NONE:
case R_X86_64_PC32:
break;
case R_X86_64_64:
VerboseMsg ("EFI_IMAGE_REL_BASED_DIR64 Offset: 0x%08X",
mCoffSectionsOffset[RelShdr->sh_info] + (Rel->r_offset - SecShdr->sh_addr));
CoffAddFixup(
(UINT32) ((UINT64) mCoffSectionsOffset[RelShdr->sh_info]
+ (Rel->r_offset - SecShdr->sh_addr)),
EFI_IMAGE_REL_BASED_DIR64);
break;
case R_X86_64_32S:
case R_X86_64_32:
VerboseMsg ("EFI_IMAGE_REL_BASED_HIGHLOW Offset: 0x%08X",
mCoffSectionsOffset[RelShdr->sh_info] + (Rel->r_offset - SecShdr->sh_addr));
CoffAddFixup(
(UINT32) ((UINT64) mCoffSectionsOffset[RelShdr->sh_info]
+ (Rel->r_offset - SecShdr->sh_addr)),
EFI_IMAGE_REL_BASED_HIGHLOW);
break;
default:
Error (NULL, 0, 3000, "Invalid", "%s unsupported ELF EM_X86_64 relocation 0x%x.", mInImageName, (unsigned) ELF_R_TYPE(Rel->r_info));
}
} else {
Error (NULL, 0, 3000, "Not Supported", "This tool does not support relocations for ELF with e_machine %u (processor type).", (unsigned) mEhdr->e_machine);
}
}
}
}
}
//
// Pad by adding empty entries.
//
while (mCoffOffset & (mCoffAlignment - 1)) {
CoffAddFixupEntry(0);
}
NtHdr = (EFI_IMAGE_OPTIONAL_HEADER_UNION *)(mCoffFile + mNtHdrOffset);
Dir = &NtHdr->Pe32Plus.OptionalHeader.DataDirectory[EFI_IMAGE_DIRECTORY_ENTRY_BASERELOC];
Dir->Size = mCoffOffset - mRelocOffset;
if (Dir->Size == 0) {
// If no relocations, null out the directory entry and don't add the .reloc section
Dir->VirtualAddress = 0;
NtHdr->Pe32Plus.FileHeader.NumberOfSections--;
} else {
Dir->VirtualAddress = mRelocOffset;
CreateSectionHeader (".reloc", mRelocOffset, mCoffOffset - mRelocOffset,
EFI_IMAGE_SCN_CNT_INITIALIZED_DATA
| EFI_IMAGE_SCN_MEM_DISCARDABLE
| EFI_IMAGE_SCN_MEM_READ);
}
}
BOOLEAN
ConvertElf (
UINT8 **FileBuffer,
UINT32 *FileLength
)
{
ELF_FUNCTION_TABLE ElfFunctions;
UINT8 EiClass;
//
// Determine ELF type and set function table pointer correctly.
//
VerboseMsg ("Check Elf Image Header");
EiClass = (*FileBuffer)[EI_CLASS];
if (EiClass == ELFCLASS32) {
if (!InitializeElf32 (*FileBuffer, &ElfFunctions)) {
return FALSE;
}
} else if (EiClass == ELFCLASS64) {
if (!InitializeElf64 (*FileBuffer, &ElfFunctions)) {
return FALSE;
}
} else {
Error (NULL, 0, 3000, "Unsupported", "ELF EI_CLASS not supported.");
return FALSE;
}
//
// Compute sections new address.
//
VerboseMsg ("Compute sections new address.");
ElfFunctions.ScanSections ();
//
// Write and relocate sections.
//
VerboseMsg ("Write and relocate sections.");
ElfFunctions.WriteSections (SECTION_TEXT);
ElfFunctions.WriteSections (SECTION_DATA);
ElfFunctions.WriteSections (SECTION_HII);
//
// Translate and write relocations.
//
VerboseMsg ("Translate and write relocations.");
ElfFunctions.WriteRelocations ();
//
// Write debug info.
//
VerboseMsg ("Write debug info.");
ElfFunctions.WriteDebug ();
//
// Make sure image size is correct before returning the new image.
//
VerboseMsg ("Set image size.");
ElfFunctions.SetImageSize ();
//
// Replace.
//
free (*FileBuffer);
*FileBuffer = mCoffFile;
*FileLength = mCoffOffset;
//
// Free resources used by ELF functions.
//
ElfFunctions.CleanUp ();
return TRUE;
}
STATIC
BOOLEAN
WriteSections64 (
SECTION_FILTER_TYPES FilterType
)
{
UINT32 Idx;
Elf_Shdr *SecShdr;
UINT32 SecOffset;
BOOLEAN (*Filter)(Elf_Shdr *);
//
// Initialize filter pointer
//
switch (FilterType) {
case SECTION_TEXT:
Filter = IsTextShdr;
break;
case SECTION_HII:
Filter = IsHiiRsrcShdr;
break;
case SECTION_DATA:
Filter = IsDataShdr;
break;
default:
return FALSE;
}
//
// First: copy sections.
//
for (Idx = 0; Idx < mEhdr->e_shnum; Idx++) {
Elf_Shdr *Shdr = GetShdrByIndex(Idx);
if ((*Filter)(Shdr)) {
switch (Shdr->sh_type) {
case SHT_PROGBITS:
/* Copy. */
memcpy(mCoffFile + mCoffSectionsOffset[Idx],
(UINT8*)mEhdr + Shdr->sh_offset,
(size_t) Shdr->sh_size);
break;
case SHT_NOBITS:
memset(mCoffFile + mCoffSectionsOffset[Idx], 0, (size_t) Shdr->sh_size);
break;
default:
//
// Ignore for unkown section type.
//
VerboseMsg ("%s unknown section type %x. We directly copy this section into Coff file", mInImageName, (unsigned)Shdr->sh_type);
break;
}
}
}
//
// Second: apply relocations.
//
VerboseMsg ("Applying Relocations...");
for (Idx = 0; Idx < mEhdr->e_shnum; Idx++) {
Elf_Shdr *RelShdr = GetShdrByIndex(Idx);
if ((RelShdr->sh_type != SHT_REL) && (RelShdr->sh_type != SHT_RELA)) {
continue;
}
SecShdr = GetShdrByIndex(RelShdr->sh_info);
SecOffset = mCoffSectionsOffset[RelShdr->sh_info];
if (RelShdr->sh_type == SHT_RELA && (*Filter)(SecShdr)) {
UINT64 RelIdx;
Elf_Shdr *SymtabShdr = GetShdrByIndex(RelShdr->sh_link);
UINT8 *Symtab = (UINT8*)mEhdr + SymtabShdr->sh_offset;
for (RelIdx = 0; RelIdx < RelShdr->sh_size; RelIdx += (UINT32) RelShdr->sh_entsize) {
Elf_Rela *Rel = (Elf_Rela *)((UINT8*)mEhdr + RelShdr->sh_offset + RelIdx);
Elf_Sym *Sym = (Elf_Sym *)(Symtab + ELF_R_SYM(Rel->r_info) * SymtabShdr->sh_entsize);
Elf_Shdr *SymShdr;
UINT8 *Targ;
if (Sym->st_shndx == SHN_UNDEF
|| Sym->st_shndx == SHN_ABS
|| Sym->st_shndx > mEhdr->e_shnum) {
Error (NULL, 0, 3000, "Invalid", "%s bad symbol definition.", mInImageName);
}
SymShdr = GetShdrByIndex(Sym->st_shndx);
//
// Note: r_offset in a memory address.
// Convert it to a pointer in the coff file.
//
Targ = mCoffFile + SecOffset + (Rel->r_offset - SecShdr->sh_addr);
if (mEhdr->e_machine == EM_X86_64) {
switch (ELF_R_TYPE(Rel->r_info)) {
case R_X86_64_NONE:
break;
case R_X86_64_64:
//
// Absolute relocation.
//
VerboseMsg ("R_X86_64_64");
VerboseMsg ("Offset: 0x%08X, Addend: 0x%016LX",
(UINT32)(SecOffset + (Rel->r_offset - SecShdr->sh_addr)),
*(UINT64 *)Targ);
*(UINT64 *)Targ = *(UINT64 *)Targ - SymShdr->sh_addr + mCoffSectionsOffset[Sym->st_shndx];
VerboseMsg ("Relocation: 0x%016LX", *(UINT64*)Targ);
break;
case R_X86_64_32:
VerboseMsg ("R_X86_64_32");
VerboseMsg ("Offset: 0x%08X, Addend: 0x%08X",
(UINT32)(SecOffset + (Rel->r_offset - SecShdr->sh_addr)),
*(UINT32 *)Targ);
*(UINT32 *)Targ = (UINT32)((UINT64)(*(UINT32 *)Targ) - SymShdr->sh_addr + mCoffSectionsOffset[Sym->st_shndx]);
VerboseMsg ("Relocation: 0x%08X", *(UINT32*)Targ);
break;
case R_X86_64_32S:
VerboseMsg ("R_X86_64_32S");
VerboseMsg ("Offset: 0x%08X, Addend: 0x%08X",
(UINT32)(SecOffset + (Rel->r_offset - SecShdr->sh_addr)),
*(UINT32 *)Targ);
*(INT32 *)Targ = (INT32)((INT64)(*(INT32 *)Targ) - SymShdr->sh_addr + mCoffSectionsOffset[Sym->st_shndx]);
VerboseMsg ("Relocation: 0x%08X", *(UINT32*)Targ);
break;
case R_X86_64_PC32:
//
// Relative relocation: Symbol - Ip + Addend
//
VerboseMsg ("R_X86_64_PC32");
VerboseMsg ("Offset: 0x%08X, Addend: 0x%08X",
(UINT32)(SecOffset + (Rel->r_offset - SecShdr->sh_addr)),
*(UINT32 *)Targ);
*(UINT32 *)Targ = (UINT32) (*(UINT32 *)Targ
+ (mCoffSectionsOffset[Sym->st_shndx] - SymShdr->sh_addr)
- (SecOffset - SecShdr->sh_addr));
VerboseMsg ("Relocation: 0x%08X", *(UINT32 *)Targ);
break;
default:
Error (NULL, 0, 3000, "Invalid", "%s unsupported ELF EM_X86_64 relocation 0x%x.", mInImageName, (unsigned) ELF_R_TYPE(Rel->r_info));
}
} else {
Error (NULL, 0, 3000, "Invalid", "Not EM_X86_X64");
}
}
}
}
return TRUE;
}
//
// Initialization Function
//
BOOLEAN
InitializeElf64 (
UINT8 *FileBuffer,
ELF_FUNCTION_TABLE *ElfFunctions
)
{
//
// Initialize data pointer and structures.
//
VerboseMsg ("Set EHDR");
mEhdr = (Elf_Ehdr*) FileBuffer;
//
// Check the ELF64 specific header information.
//
VerboseMsg ("Check ELF64 Header Information");
if (mEhdr->e_ident[EI_CLASS] != ELFCLASS64) {
Error (NULL, 0, 3000, "Unsupported", "ELF EI_DATA not ELFCLASS64");
return FALSE;
}
if (mEhdr->e_ident[EI_DATA] != ELFDATA2LSB) {
Error (NULL, 0, 3000, "Unsupported", "ELF EI_DATA not ELFDATA2LSB");
return FALSE;
}
if ((mEhdr->e_type != ET_EXEC) && (mEhdr->e_type != ET_DYN)) {
Error (NULL, 0, 3000, "Unsupported", "ELF e_type not ET_EXEC or ET_DYN");
return FALSE;
}
if (!((mEhdr->e_machine == EM_X86_64))) {
Error (NULL, 0, 3000, "Unsupported", "ELF e_machine not EM_X86_64");
return FALSE;
}
if (mEhdr->e_version != EV_CURRENT) {
Error (NULL, 0, 3000, "Unsupported", "ELF e_version (%u) not EV_CURRENT (%d)", (unsigned) mEhdr->e_version, EV_CURRENT);
return FALSE;
}
//
// Update section header pointers
//
VerboseMsg ("Update Header Pointers");
mShdrBase = (Elf_Shdr *)((UINT8 *)mEhdr + mEhdr->e_shoff);
mPhdrBase = (Elf_Phdr *)((UINT8 *)mEhdr + mEhdr->e_phoff);
//
// Create COFF Section offset buffer and zero.
//
VerboseMsg ("Create COFF Section Offset Buffer");
mCoffSectionsOffset = (UINT32 *)malloc(mEhdr->e_shnum * sizeof (UINT32));
memset(mCoffSectionsOffset, 0, mEhdr->e_shnum * sizeof(UINT32));
//
// Fill in function pointers.
//
VerboseMsg ("Fill in Function Pointers");
ElfFunctions->ScanSections = ScanSections64;
ElfFunctions->WriteSections = WriteSections64;
ElfFunctions->WriteRelocations = WriteRelocations64;
ElfFunctions->WriteDebug = WriteDebug64;
ElfFunctions->SetImageSize = SetImageSize64;
ElfFunctions->CleanUp = CleanUp64;
return TRUE;
}
STATIC
VOID
ScanSections32 (
VOID
)
{
UINT32 i;
EFI_IMAGE_DOS_HEADER *DosHdr;
EFI_IMAGE_OPTIONAL_HEADER_UNION *NtHdr;
UINT32 CoffEntry;
UINT32 SectionCount;
BOOLEAN FoundSection;
CoffEntry = 0;
mCoffOffset = 0;
//
// Coff file start with a DOS header.
//
mCoffOffset = sizeof(EFI_IMAGE_DOS_HEADER) + 0x40;
mNtHdrOffset = mCoffOffset;
switch (mEhdr->e_machine) {
case EM_386:
case EM_ARM:
mCoffOffset += sizeof (EFI_IMAGE_NT_HEADERS32);
break;
default:
VerboseMsg ("%s unknown e_machine type. Assume IA-32", (UINTN)mEhdr->e_machine);
mCoffOffset += sizeof (EFI_IMAGE_NT_HEADERS32);
break;
}
mTableOffset = mCoffOffset;
mCoffOffset += mCoffNbrSections * sizeof(EFI_IMAGE_SECTION_HEADER);
//
// Set mCoffAlignment to the maximum alignment of the input sections
// we care about
//
for (i = 0; i < mEhdr->e_shnum; i++) {
Elf_Shdr *shdr = GetShdrByIndex(i);
if (shdr->sh_addralign <= mCoffAlignment) {
continue;
}
if (IsTextShdr(shdr) || IsDataShdr(shdr) || IsHiiRsrcShdr(shdr)) {
mCoffAlignment = (UINT32)shdr->sh_addralign;
}
}
//
// Move the PE/COFF header right before the first section. This will help us
// save space when converting to TE.
//
if (mCoffAlignment > mCoffOffset) {
mNtHdrOffset += mCoffAlignment - mCoffOffset;
mTableOffset += mCoffAlignment - mCoffOffset;
mCoffOffset = mCoffAlignment;
}
//
// First text sections.
//
mCoffOffset = CoffAlign(mCoffOffset);
mTextOffset = mCoffOffset;
FoundSection = FALSE;
SectionCount = 0;
for (i = 0; i < mEhdr->e_shnum; i++) {
Elf_Shdr *shdr = GetShdrByIndex(i);
if (IsTextShdr(shdr)) {
if ((shdr->sh_addralign != 0) && (shdr->sh_addralign != 1)) {
// the alignment field is valid
if ((shdr->sh_addr & (shdr->sh_addralign - 1)) == 0) {
// if the section address is aligned we must align PE/COFF
mCoffOffset = (mCoffOffset + shdr->sh_addralign - 1) & ~(shdr->sh_addralign - 1);
} else {
Error (NULL, 0, 3000, "Invalid", "Section address not aligned to its own alignment.");
}
}
/* Relocate entry. */
if ((mEhdr->e_entry >= shdr->sh_addr) &&
(mEhdr->e_entry < shdr->sh_addr + shdr->sh_size)) {
CoffEntry = mCoffOffset + mEhdr->e_entry - shdr->sh_addr;
}
//
// Set mTextOffset with the offset of the first '.text' section
//
if (!FoundSection) {
mTextOffset = mCoffOffset;
FoundSection = TRUE;
}
mCoffSectionsOffset[i] = mCoffOffset;
mCoffOffset += shdr->sh_size;
SectionCount ++;
}
}
if (!FoundSection) {
Error (NULL, 0, 3000, "Invalid", "Did not find any '.text' section.");
assert (FALSE);
}
mDebugOffset = DebugRvaAlign(mCoffOffset);
mCoffOffset = CoffAlign(mCoffOffset);
if (SectionCount > 1 && mOutImageType == FW_EFI_IMAGE) {
Warning (NULL, 0, 0, NULL, "Mulitple sections in %s are merged into 1 text section. Source level debug might not work correctly.", mInImageName);
}
//
// Then data sections.
//
mDataOffset = mCoffOffset;
FoundSection = FALSE;
SectionCount = 0;
for (i = 0; i < mEhdr->e_shnum; i++) {
Elf_Shdr *shdr = GetShdrByIndex(i);
if (IsDataShdr(shdr)) {
if ((shdr->sh_addralign != 0) && (shdr->sh_addralign != 1)) {
// the alignment field is valid
if ((shdr->sh_addr & (shdr->sh_addralign - 1)) == 0) {
// if the section address is aligned we must align PE/COFF
mCoffOffset = (mCoffOffset + shdr->sh_addralign - 1) & ~(shdr->sh_addralign - 1);
} else {
Error (NULL, 0, 3000, "Invalid", "Section address not aligned to its own alignment.");
}
}
//
// Set mDataOffset with the offset of the first '.data' section
//
if (!FoundSection) {
mDataOffset = mCoffOffset;
FoundSection = TRUE;
}
mCoffSectionsOffset[i] = mCoffOffset;
mCoffOffset += shdr->sh_size;
SectionCount ++;
}
}
if (SectionCount > 1 && mOutImageType == FW_EFI_IMAGE) {
Warning (NULL, 0, 0, NULL, "Mulitple sections in %s are merged into 1 data section. Source level debug might not work correctly.", mInImageName);
}
//
// Make room for .debug data in .data (or .text if .data is empty) instead of
// putting it in a section of its own. This is explicitly allowed by the
// PE/COFF spec, and prevents bloat in the binary when using large values for
// section alignment.
//
if (SectionCount > 0) {
mDebugOffset = DebugRvaAlign(mCoffOffset);
}
mCoffOffset = mDebugOffset + sizeof(EFI_IMAGE_DEBUG_DIRECTORY_ENTRY) +
sizeof(EFI_IMAGE_DEBUG_CODEVIEW_NB10_ENTRY) +
strlen(mInImageName) + 1;
mCoffOffset = CoffAlign(mCoffOffset);
if (SectionCount == 0) {
mDataOffset = mCoffOffset;
}
//
// The HII resource sections.
//
mHiiRsrcOffset = mCoffOffset;
for (i = 0; i < mEhdr->e_shnum; i++) {
Elf_Shdr *shdr = GetShdrByIndex(i);
if (IsHiiRsrcShdr(shdr)) {
if ((shdr->sh_addralign != 0) && (shdr->sh_addralign != 1)) {
// the alignment field is valid
if ((shdr->sh_addr & (shdr->sh_addralign - 1)) == 0) {
// if the section address is aligned we must align PE/COFF
mCoffOffset = (mCoffOffset + shdr->sh_addralign - 1) & ~(shdr->sh_addralign - 1);
} else {
Error (NULL, 0, 3000, "Invalid", "Section address not aligned to its own alignment.");
}
}
if (shdr->sh_size != 0) {
mHiiRsrcOffset = mCoffOffset;
mCoffSectionsOffset[i] = mCoffOffset;
mCoffOffset += shdr->sh_size;
mCoffOffset = CoffAlign(mCoffOffset);
SetHiiResourceHeader ((UINT8*) mEhdr + shdr->sh_offset, mHiiRsrcOffset);
}
break;
}
}
mRelocOffset = mCoffOffset;
//
// Allocate base Coff file. Will be expanded later for relocations.
//
mCoffFile = (UINT8 *)malloc(mCoffOffset);
memset(mCoffFile, 0, mCoffOffset);
//
// Fill headers.
//
DosHdr = (EFI_IMAGE_DOS_HEADER *)mCoffFile;
DosHdr->e_magic = EFI_IMAGE_DOS_SIGNATURE;
DosHdr->e_lfanew = mNtHdrOffset;
NtHdr = (EFI_IMAGE_OPTIONAL_HEADER_UNION*)(mCoffFile + mNtHdrOffset);
NtHdr->Pe32.Signature = EFI_IMAGE_NT_SIGNATURE;
switch (mEhdr->e_machine) {
case EM_386:
NtHdr->Pe32.FileHeader.Machine = EFI_IMAGE_MACHINE_IA32;
NtHdr->Pe32.OptionalHeader.Magic = EFI_IMAGE_NT_OPTIONAL_HDR32_MAGIC;
break;
case EM_ARM:
NtHdr->Pe32.FileHeader.Machine = EFI_IMAGE_MACHINE_ARMT;
NtHdr->Pe32.OptionalHeader.Magic = EFI_IMAGE_NT_OPTIONAL_HDR32_MAGIC;
break;
default:
VerboseMsg ("%s unknown e_machine type. Assume IA-32", (UINTN)mEhdr->e_machine);
NtHdr->Pe32.FileHeader.Machine = EFI_IMAGE_MACHINE_IA32;
NtHdr->Pe32.OptionalHeader.Magic = EFI_IMAGE_NT_OPTIONAL_HDR32_MAGIC;
}
NtHdr->Pe32.FileHeader.NumberOfSections = mCoffNbrSections;
NtHdr->Pe32.FileHeader.TimeDateStamp = (UINT32) time(NULL);
mImageTimeStamp = NtHdr->Pe32.FileHeader.TimeDateStamp;
NtHdr->Pe32.FileHeader.PointerToSymbolTable = 0;
NtHdr->Pe32.FileHeader.NumberOfSymbols = 0;
NtHdr->Pe32.FileHeader.SizeOfOptionalHeader = sizeof(NtHdr->Pe32.OptionalHeader);
NtHdr->Pe32.FileHeader.Characteristics = EFI_IMAGE_FILE_EXECUTABLE_IMAGE
| EFI_IMAGE_FILE_LINE_NUMS_STRIPPED
| EFI_IMAGE_FILE_LOCAL_SYMS_STRIPPED
| EFI_IMAGE_FILE_32BIT_MACHINE;
NtHdr->Pe32.OptionalHeader.SizeOfCode = mDataOffset - mTextOffset;
NtHdr->Pe32.OptionalHeader.SizeOfInitializedData = mRelocOffset - mDataOffset;
NtHdr->Pe32.OptionalHeader.SizeOfUninitializedData = 0;
NtHdr->Pe32.OptionalHeader.AddressOfEntryPoint = CoffEntry;
NtHdr->Pe32.OptionalHeader.BaseOfCode = mTextOffset;
NtHdr->Pe32.OptionalHeader.BaseOfData = mDataOffset;
NtHdr->Pe32.OptionalHeader.ImageBase = 0;
NtHdr->Pe32.OptionalHeader.SectionAlignment = mCoffAlignment;
NtHdr->Pe32.OptionalHeader.FileAlignment = mCoffAlignment;
NtHdr->Pe32.OptionalHeader.SizeOfImage = 0;
NtHdr->Pe32.OptionalHeader.SizeOfHeaders = mTextOffset;
NtHdr->Pe32.OptionalHeader.NumberOfRvaAndSizes = EFI_IMAGE_NUMBER_OF_DIRECTORY_ENTRIES;
//
// Section headers.
//
if ((mDataOffset - mTextOffset) > 0) {
CreateSectionHeader (".text", mTextOffset, mDataOffset - mTextOffset,
EFI_IMAGE_SCN_CNT_CODE
| EFI_IMAGE_SCN_MEM_EXECUTE
| EFI_IMAGE_SCN_MEM_READ);
} else {
// Don't make a section of size 0.
NtHdr->Pe32.FileHeader.NumberOfSections--;
}
if ((mHiiRsrcOffset - mDataOffset) > 0) {
CreateSectionHeader (".data", mDataOffset, mHiiRsrcOffset - mDataOffset,
EFI_IMAGE_SCN_CNT_INITIALIZED_DATA
| EFI_IMAGE_SCN_MEM_WRITE
| EFI_IMAGE_SCN_MEM_READ);
} else {
// Don't make a section of size 0.
NtHdr->Pe32.FileHeader.NumberOfSections--;
}
if ((mRelocOffset - mHiiRsrcOffset) > 0) {
CreateSectionHeader (".rsrc", mHiiRsrcOffset, mRelocOffset - mHiiRsrcOffset,
EFI_IMAGE_SCN_CNT_INITIALIZED_DATA
| EFI_IMAGE_SCN_MEM_READ);
NtHdr->Pe32.OptionalHeader.DataDirectory[EFI_IMAGE_DIRECTORY_ENTRY_RESOURCE].Size = mRelocOffset - mHiiRsrcOffset;
NtHdr->Pe32.OptionalHeader.DataDirectory[EFI_IMAGE_DIRECTORY_ENTRY_RESOURCE].VirtualAddress = mHiiRsrcOffset;
} else {
// Don't make a section of size 0.
NtHdr->Pe32.FileHeader.NumberOfSections--;
}
}
STATIC
BOOLEAN
WriteSections64 (
SECTION_FILTER_TYPES FilterType
)
{
UINT32 Idx;
Elf_Shdr *SecShdr;
UINT32 SecOffset;
BOOLEAN (*Filter)(Elf_Shdr *);
//
// Initialize filter pointer
//
switch (FilterType) {
case SECTION_TEXT:
Filter = IsTextShdr;
break;
case SECTION_HII:
Filter = IsHiiRsrcShdr;
break;
case SECTION_DATA:
Filter = IsDataShdr;
break;
default:
return FALSE;
}
//
// First: copy sections.
//
for (Idx = 0; Idx < mEhdr->e_shnum; Idx++) {
Elf_Shdr *Shdr = GetShdrByIndex(Idx);
if ((*Filter)(Shdr)) {
switch (Shdr->sh_type) {
case SHT_PROGBITS:
/* Copy. */
memcpy(mCoffFile + mCoffSectionsOffset[Idx],
(UINT8*)mEhdr + Shdr->sh_offset,
(size_t) Shdr->sh_size);
break;
case SHT_NOBITS:
memset(mCoffFile + mCoffSectionsOffset[Idx], 0, (size_t) Shdr->sh_size);
break;
default:
//
// Ignore for unkown section type.
//
VerboseMsg ("%s unknown section type %x. We directly copy this section into Coff file", mInImageName, (unsigned)Shdr->sh_type);
break;
}
}
}
//
// Second: apply relocations.
//
VerboseMsg ("Applying Relocations...");
for (Idx = 0; Idx < mEhdr->e_shnum; Idx++) {
//
// Determine if this is a relocation section.
//
Elf_Shdr *RelShdr = GetShdrByIndex(Idx);
if ((RelShdr->sh_type != SHT_REL) && (RelShdr->sh_type != SHT_RELA)) {
continue;
}
//
// Relocation section found. Now extract section information that the relocations
// apply to in the ELF data and the new COFF data.
//
SecShdr = GetShdrByIndex(RelShdr->sh_info);
SecOffset = mCoffSectionsOffset[RelShdr->sh_info];
//
// Only process relocations for the current filter type.
//
if (RelShdr->sh_type == SHT_RELA && (*Filter)(SecShdr)) {
UINT64 RelIdx;
//
// Determine the symbol table referenced by the relocation data.
//
Elf_Shdr *SymtabShdr = GetShdrByIndex(RelShdr->sh_link);
UINT8 *Symtab = (UINT8*)mEhdr + SymtabShdr->sh_offset;
//
// Process all relocation entries for this section.
//
for (RelIdx = 0; RelIdx < RelShdr->sh_size; RelIdx += (UINT32) RelShdr->sh_entsize) {
//
// Set pointer to relocation entry
//
Elf_Rela *Rel = (Elf_Rela *)((UINT8*)mEhdr + RelShdr->sh_offset + RelIdx);
//
// Set pointer to symbol table entry associated with the relocation entry.
//
Elf_Sym *Sym = (Elf_Sym *)(Symtab + ELF_R_SYM(Rel->r_info) * SymtabShdr->sh_entsize);
Elf_Shdr *SymShdr;
UINT8 *Targ;
//
// Check section header index found in symbol table and get the section
// header location.
//
if (Sym->st_shndx == SHN_UNDEF
|| Sym->st_shndx == SHN_ABS
|| Sym->st_shndx > mEhdr->e_shnum) {
Error (NULL, 0, 3000, "Invalid", "%s bad symbol definition.", mInImageName);
}
SymShdr = GetShdrByIndex(Sym->st_shndx);
//
// Convert the relocation data to a pointer into the coff file.
//
// Note:
// r_offset is the virtual address of the storage unit to be relocated.
// sh_addr is the virtual address for the base of the section.
//
// r_offset in a memory address.
// Convert it to a pointer in the coff file.
//
Targ = mCoffFile + SecOffset + (Rel->r_offset - SecShdr->sh_addr);
//
// Determine how to handle each relocation type based on the machine type.
//
if (mEhdr->e_machine == EM_X86_64) {
switch (ELF_R_TYPE(Rel->r_info)) {
case R_X86_64_NONE:
break;
case R_X86_64_64:
//
// Absolute relocation.
//
VerboseMsg ("R_X86_64_64");
VerboseMsg ("Offset: 0x%08X, Addend: 0x%016LX",
(UINT32)(SecOffset + (Rel->r_offset - SecShdr->sh_addr)),
*(UINT64 *)Targ);
*(UINT64 *)Targ = *(UINT64 *)Targ - SymShdr->sh_addr + mCoffSectionsOffset[Sym->st_shndx];
VerboseMsg ("Relocation: 0x%016LX", *(UINT64*)Targ);
break;
case R_X86_64_32:
VerboseMsg ("R_X86_64_32");
VerboseMsg ("Offset: 0x%08X, Addend: 0x%08X",
(UINT32)(SecOffset + (Rel->r_offset - SecShdr->sh_addr)),
*(UINT32 *)Targ);
*(UINT32 *)Targ = (UINT32)((UINT64)(*(UINT32 *)Targ) - SymShdr->sh_addr + mCoffSectionsOffset[Sym->st_shndx]);
VerboseMsg ("Relocation: 0x%08X", *(UINT32*)Targ);
break;
case R_X86_64_32S:
VerboseMsg ("R_X86_64_32S");
VerboseMsg ("Offset: 0x%08X, Addend: 0x%08X",
(UINT32)(SecOffset + (Rel->r_offset - SecShdr->sh_addr)),
*(UINT32 *)Targ);
*(INT32 *)Targ = (INT32)((INT64)(*(INT32 *)Targ) - SymShdr->sh_addr + mCoffSectionsOffset[Sym->st_shndx]);
VerboseMsg ("Relocation: 0x%08X", *(UINT32*)Targ);
break;
case R_X86_64_PC32:
//
// Relative relocation: Symbol - Ip + Addend
//
VerboseMsg ("R_X86_64_PC32");
VerboseMsg ("Offset: 0x%08X, Addend: 0x%08X",
(UINT32)(SecOffset + (Rel->r_offset - SecShdr->sh_addr)),
*(UINT32 *)Targ);
*(UINT32 *)Targ = (UINT32) (*(UINT32 *)Targ
+ (mCoffSectionsOffset[Sym->st_shndx] - SymShdr->sh_addr)
- (SecOffset - SecShdr->sh_addr));
VerboseMsg ("Relocation: 0x%08X", *(UINT32 *)Targ);
break;
default:
Error (NULL, 0, 3000, "Invalid", "%s unsupported ELF EM_X86_64 relocation 0x%x.", mInImageName, (unsigned) ELF_R_TYPE(Rel->r_info));
}
} else if (mEhdr->e_machine == EM_AARCH64) {
// AARCH64 GCC uses RELA relocation, so all relocations have to be fixed up.
// As opposed to ARM32 using REL.
switch (ELF_R_TYPE(Rel->r_info)) {
case R_AARCH64_ADR_PREL_LO21:
if (Rel->r_addend != 0 ) { /* TODO */
Error (NULL, 0, 3000, "Invalid", "AArch64: R_AARCH64_ADR_PREL_LO21 Need to fixup with addend!.");
}
break;
case R_AARCH64_CONDBR19:
if (Rel->r_addend != 0 ) { /* TODO */
Error (NULL, 0, 3000, "Invalid", "AArch64: R_AARCH64_CONDBR19 Need to fixup with addend!.");
}
break;
case R_AARCH64_LD_PREL_LO19:
if (Rel->r_addend != 0 ) { /* TODO */
Error (NULL, 0, 3000, "Invalid", "AArch64: R_AARCH64_LD_PREL_LO19 Need to fixup with addend!.");
}
break;
case R_AARCH64_CALL26:
case R_AARCH64_JUMP26:
if (Rel->r_addend != 0 ) {
// Some references to static functions sometime start at the base of .text + addend.
// It is safe to ignore these relocations because they patch a `BL` instructions that
// contains an offset from the instruction itself and there is only a single .text section.
// So we check if the symbol is a "section symbol"
if (ELF64_ST_TYPE (Sym->st_info) == STT_SECTION) {
break;
}
Error (NULL, 0, 3000, "Invalid", "AArch64: R_AARCH64_JUMP26 Need to fixup with addend!.");
}
break;
case R_AARCH64_ADR_PREL_PG_HI21:
// TODO : AArch64 'small' memory model.
Error (NULL, 0, 3000, "Invalid", "WriteSections64(): %s unsupported ELF EM_AARCH64 relocation R_AARCH64_ADR_PREL_PG_HI21.", mInImageName);
break;
case R_AARCH64_ADD_ABS_LO12_NC:
// TODO : AArch64 'small' memory model.
Error (NULL, 0, 3000, "Invalid", "WriteSections64(): %s unsupported ELF EM_AARCH64 relocation R_AARCH64_ADD_ABS_LO12_NC.", mInImageName);
break;
// Absolute relocations.
case R_AARCH64_ABS64:
*(UINT64 *)Targ = *(UINT64 *)Targ - SymShdr->sh_addr + mCoffSectionsOffset[Sym->st_shndx];
break;
default:
Error (NULL, 0, 3000, "Invalid", "WriteSections64(): %s unsupported ELF EM_AARCH64 relocation 0x%x.", mInImageName, (unsigned) ELF_R_TYPE(Rel->r_info));
}
} else {
Error (NULL, 0, 3000, "Invalid", "Not a supported machine type");
}
}
}
}
return TRUE;
}
STATIC
BOOLEAN
WriteSections64 (
SECTION_FILTER_TYPES FilterType
)
{
UINT32 Idx;
Elf_Shdr *SecShdr;
UINT32 SecOffset;
BOOLEAN (*Filter)(Elf_Shdr *);
//
// Initialize filter pointer
//
switch (FilterType) {
case SECTION_TEXT:
Filter = IsTextShdr;
break;
case SECTION_HII:
Filter = IsHiiRsrcShdr;
break;
case SECTION_DATA:
Filter = IsDataShdr;
break;
default:
return FALSE;
}
//
// First: copy sections.
//
for (Idx = 0; Idx < mEhdr->e_shnum; Idx++) {
Elf_Shdr *Shdr = GetShdrByIndex(Idx);
if ((*Filter)(Shdr)) {
switch (Shdr->sh_type) {
case SHT_PROGBITS:
/* Copy. */
memcpy(mCoffFile + mCoffSectionsOffset[Idx],
(UINT8*)mEhdr + Shdr->sh_offset,
(size_t) Shdr->sh_size);
break;
case SHT_NOBITS:
memset(mCoffFile + mCoffSectionsOffset[Idx], 0, (size_t) Shdr->sh_size);
break;
default:
//
// Ignore for unkown section type.
//
VerboseMsg ("%s unknown section type %x. We directly copy this section into Coff file", mInImageName, (unsigned)Shdr->sh_type);
break;
}
}
}
//
// Second: apply relocations.
//
VerboseMsg ("Applying Relocations...");
for (Idx = 0; Idx < mEhdr->e_shnum; Idx++) {
//
// Determine if this is a relocation section.
//
Elf_Shdr *RelShdr = GetShdrByIndex(Idx);
if ((RelShdr->sh_type != SHT_REL) && (RelShdr->sh_type != SHT_RELA)) {
continue;
}
//
// Relocation section found. Now extract section information that the relocations
// apply to in the ELF data and the new COFF data.
//
SecShdr = GetShdrByIndex(RelShdr->sh_info);
SecOffset = mCoffSectionsOffset[RelShdr->sh_info];
//
// Only process relocations for the current filter type.
//
if (RelShdr->sh_type == SHT_RELA && (*Filter)(SecShdr)) {
UINT64 RelIdx;
//
// Determine the symbol table referenced by the relocation data.
//
Elf_Shdr *SymtabShdr = GetShdrByIndex(RelShdr->sh_link);
UINT8 *Symtab = (UINT8*)mEhdr + SymtabShdr->sh_offset;
//
// Process all relocation entries for this section.
//
for (RelIdx = 0; RelIdx < RelShdr->sh_size; RelIdx += (UINT32) RelShdr->sh_entsize) {
//
// Set pointer to relocation entry
//
Elf_Rela *Rel = (Elf_Rela *)((UINT8*)mEhdr + RelShdr->sh_offset + RelIdx);
//
// Set pointer to symbol table entry associated with the relocation entry.
//
Elf_Sym *Sym = (Elf_Sym *)(Symtab + ELF_R_SYM(Rel->r_info) * SymtabShdr->sh_entsize);
Elf_Shdr *SymShdr;
UINT8 *Targ;
//
// Check section header index found in symbol table and get the section
// header location.
//
if (Sym->st_shndx == SHN_UNDEF
|| Sym->st_shndx == SHN_ABS
|| Sym->st_shndx > mEhdr->e_shnum) {
Error (NULL, 0, 3000, "Invalid", "%s bad symbol definition.", mInImageName);
}
SymShdr = GetShdrByIndex(Sym->st_shndx);
//
// Convert the relocation data to a pointer into the coff file.
//
// Note:
// r_offset is the virtual address of the storage unit to be relocated.
// sh_addr is the virtual address for the base of the section.
//
// r_offset in a memory address.
// Convert it to a pointer in the coff file.
//
Targ = mCoffFile + SecOffset + (Rel->r_offset - SecShdr->sh_addr);
//
// Determine how to handle each relocation type based on the machine type.
//
if (mEhdr->e_machine == EM_X86_64) {
switch (ELF_R_TYPE(Rel->r_info)) {
case R_X86_64_NONE:
break;
case R_X86_64_64:
//
// Absolute relocation.
//
VerboseMsg ("R_X86_64_64");
VerboseMsg ("Offset: 0x%08X, Addend: 0x%016LX",
(UINT32)(SecOffset + (Rel->r_offset - SecShdr->sh_addr)),
*(UINT64 *)Targ);
*(UINT64 *)Targ = *(UINT64 *)Targ - SymShdr->sh_addr + mCoffSectionsOffset[Sym->st_shndx];
VerboseMsg ("Relocation: 0x%016LX", *(UINT64*)Targ);
break;
case R_X86_64_32:
VerboseMsg ("R_X86_64_32");
VerboseMsg ("Offset: 0x%08X, Addend: 0x%08X",
(UINT32)(SecOffset + (Rel->r_offset - SecShdr->sh_addr)),
*(UINT32 *)Targ);
*(UINT32 *)Targ = (UINT32)((UINT64)(*(UINT32 *)Targ) - SymShdr->sh_addr + mCoffSectionsOffset[Sym->st_shndx]);
VerboseMsg ("Relocation: 0x%08X", *(UINT32*)Targ);
break;
case R_X86_64_32S:
VerboseMsg ("R_X86_64_32S");
VerboseMsg ("Offset: 0x%08X, Addend: 0x%08X",
(UINT32)(SecOffset + (Rel->r_offset - SecShdr->sh_addr)),
*(UINT32 *)Targ);
*(INT32 *)Targ = (INT32)((INT64)(*(INT32 *)Targ) - SymShdr->sh_addr + mCoffSectionsOffset[Sym->st_shndx]);
VerboseMsg ("Relocation: 0x%08X", *(UINT32*)Targ);
break;
case R_X86_64_PC32:
//
// Relative relocation: Symbol - Ip + Addend
//
VerboseMsg ("R_X86_64_PC32");
VerboseMsg ("Offset: 0x%08X, Addend: 0x%08X",
(UINT32)(SecOffset + (Rel->r_offset - SecShdr->sh_addr)),
*(UINT32 *)Targ);
*(UINT32 *)Targ = (UINT32) (*(UINT32 *)Targ
+ (mCoffSectionsOffset[Sym->st_shndx] - SymShdr->sh_addr)
- (SecOffset - SecShdr->sh_addr));
VerboseMsg ("Relocation: 0x%08X", *(UINT32 *)Targ);
break;
default:
Error (NULL, 0, 3000, "Invalid", "%s unsupported ELF EM_X86_64 relocation 0x%x.", mInImageName, (unsigned) ELF_R_TYPE(Rel->r_info));
}
} else if (mEhdr->e_machine == EM_AARCH64) {
switch (ELF_R_TYPE(Rel->r_info)) {
case R_AARCH64_ADR_PREL_PG_HI21:
case R_AARCH64_ADD_ABS_LO12_NC:
case R_AARCH64_LDST8_ABS_LO12_NC:
case R_AARCH64_LDST16_ABS_LO12_NC:
case R_AARCH64_LDST32_ABS_LO12_NC:
case R_AARCH64_LDST64_ABS_LO12_NC:
case R_AARCH64_LDST128_ABS_LO12_NC:
//
// AArch64 PG_H21 relocations are typically paired with ABS_LO12
// relocations, where a PC-relative reference with +/- 4 GB range is
// split into a relative high part and an absolute low part. Since
// the absolute low part represents the offset into a 4 KB page, we
// have to make sure that the 4 KB relative offsets of both the
// section containing the reference as well as the section to which
// it refers have not been changed during PE/COFF conversion (i.e.,
// in ScanSections64() above).
//
if (((SecShdr->sh_addr ^ SecOffset) & 0xfff) != 0 ||
((SymShdr->sh_addr ^ mCoffSectionsOffset[Sym->st_shndx]) & 0xfff) != 0 ||
mCoffAlignment < 0x1000) {
Error (NULL, 0, 3000, "Invalid", "WriteSections64(): %s AARCH64 small code model requires 4 KB section alignment.",
mInImageName);
break;
}
/* fall through */
case R_AARCH64_ADR_PREL_LO21:
case R_AARCH64_CONDBR19:
case R_AARCH64_LD_PREL_LO19:
case R_AARCH64_CALL26:
case R_AARCH64_JUMP26:
//
// The GCC toolchains (i.e., binutils) may corrupt section relative
// relocations when emitting relocation sections into fully linked
// binaries. More specifically, they tend to fail to take into
// account the fact that a '.rodata + XXX' relocation needs to have
// its addend recalculated once .rodata is merged into the .text
// section, and the relocation emitted into the .rela.text section.
//
// We cannot really recover from this loss of information, so the
// only workaround is to prevent having to recalculate any relative
// relocations at all, by using a linker script that ensures that
// the offset between the Place and the Symbol is the same in both
// the ELF and the PE/COFF versions of the binary.
//
if ((SymShdr->sh_addr - SecShdr->sh_addr) !=
(mCoffSectionsOffset[Sym->st_shndx] - SecOffset)) {
Error (NULL, 0, 3000, "Invalid", "WriteSections64(): %s AARCH64 relative relocations require identical ELF and PE/COFF section offsets",
mInImageName);
}
break;
// Absolute relocations.
case R_AARCH64_ABS64:
*(UINT64 *)Targ = *(UINT64 *)Targ - SymShdr->sh_addr + mCoffSectionsOffset[Sym->st_shndx];
break;
default:
Error (NULL, 0, 3000, "Invalid", "WriteSections64(): %s unsupported ELF EM_AARCH64 relocation 0x%x.", mInImageName, (unsigned) ELF_R_TYPE(Rel->r_info));
}
} else {
Error (NULL, 0, 3000, "Invalid", "Not a supported machine type");
}
}
}
}
return TRUE;
}
