#include "llvm/ADT/Triple.h"
#include "llvm/Object/MachO.h"
#include "llvm/Object/MachOFormat.h"
+#include "llvm/Support/Format.h"
#include "llvm/Support/MemoryBuffer.h"
-#include "llvm/Support/raw_ostream.h"
#include <cctype>
#include <cstring>
return object_error::success;
}
-error_code MachOObjectFile::getSymbolOffset(DataRefImpl DRI,
- uint64_t &Result) const {
- uint64_t SectionOffset;
- uint8_t SectionIndex;
+error_code MachOObjectFile::getSymbolFileOffset(DataRefImpl DRI,
+ uint64_t &Result) const {
if (MachOObj->is64Bit()) {
InMemoryStruct<macho::Symbol64TableEntry> Entry;
getSymbol64TableEntry(DRI, Entry);
Result = Entry->Value;
- SectionIndex = Entry->SectionIndex;
+ if (Entry->SectionIndex) {
+ InMemoryStruct<macho::Section64> Section;
+ getSection64(Sections[Entry->SectionIndex-1], Section);
+ Result += Section->Offset - Section->Address;
+ }
} else {
InMemoryStruct<macho::SymbolTableEntry> Entry;
getSymbolTableEntry(DRI, Entry);
Result = Entry->Value;
- SectionIndex = Entry->SectionIndex;
+ if (Entry->SectionIndex) {
+ InMemoryStruct<macho::Section> Section;
+ getSection(Sections[Entry->SectionIndex-1], Section);
+ Result += Section->Offset - Section->Address;
+ }
}
- getSectionAddress(Sections[SectionIndex-1], SectionOffset);
- Result -= SectionOffset;
return object_error::success;
}
error_code MachOObjectFile::getSymbolSize(DataRefImpl DRI,
uint64_t &Result) const {
- Result = UnknownAddressOrSize;
+ uint32_t LoadCommandCount = MachOObj->getHeader().NumLoadCommands;
+ uint64_t BeginOffset;
+ uint64_t EndOffset = 0;
+ uint8_t SectionIndex;
+ if (MachOObj->is64Bit()) {
+ InMemoryStruct<macho::Symbol64TableEntry> Entry;
+ getSymbol64TableEntry(DRI, Entry);
+ BeginOffset = Entry->Value;
+ SectionIndex = Entry->SectionIndex;
+ if (!SectionIndex) {
+ Result = UnknownAddressOrSize;
+ return object_error::success;
+ }
+ // Unfortunately symbols are unsorted so we need to touch all
+ // symbols from load command
+ DRI.d.b = 0;
+ uint32_t Command = DRI.d.a;
+ while (Command == DRI.d.a) {
+ moveToNextSymbol(DRI);
+ if (DRI.d.a < LoadCommandCount) {
+ getSymbol64TableEntry(DRI, Entry);
+ if (Entry->SectionIndex == SectionIndex && Entry->Value > BeginOffset)
+ if (!EndOffset || Entry->Value < EndOffset)
+ EndOffset = Entry->Value;
+ }
+ DRI.d.b++;
+ }
+ } else {
+ InMemoryStruct<macho::SymbolTableEntry> Entry;
+ getSymbolTableEntry(DRI, Entry);
+ BeginOffset = Entry->Value;
+ SectionIndex = Entry->SectionIndex;
+ if (!SectionIndex) {
+ Result = UnknownAddressOrSize;
+ return object_error::success;
+ }
+ // Unfortunately symbols are unsorted so we need to touch all
+ // symbols from load command
+ DRI.d.b = 0;
+ uint32_t Command = DRI.d.a;
+ while (Command == DRI.d.a) {
+ moveToNextSymbol(DRI);
+ if (DRI.d.a < LoadCommandCount) {
+ getSymbolTableEntry(DRI, Entry);
+ if (Entry->SectionIndex == SectionIndex && Entry->Value > BeginOffset)
+ if (!EndOffset || Entry->Value < EndOffset)
+ EndOffset = Entry->Value;
+ }
+ DRI.d.b++;
+ }
+ }
+ if (!EndOffset) {
+ uint64_t Size;
+ getSectionSize(Sections[SectionIndex-1], Size);
+ getSectionAddress(Sections[SectionIndex-1], EndOffset);
+ EndOffset += Size;
+ }
+ Result = EndOffset - BeginOffset;
return object_error::success;
}
if (index == 0)
Res = end_sections();
else
- Res = section_iterator(SectionRef(Sections[index], this));
+ Res = section_iterator(SectionRef(Sections[index-1], this));
return object_error::success;
}
}
InMemoryStruct<macho::RelocationEntry> RE;
getRelocation(Rel, RE);
- Res = reinterpret_cast<uintptr_t>(sectAddress + RE->Word0);
+
+ unsigned Arch = getArch();
+ bool isScattered = (Arch != Triple::x86_64) &&
+ (RE->Word0 & macho::RF_Scattered);
+ uint64_t RelAddr = 0;
+ if (isScattered)
+ RelAddr = RE->Word0 & 0xFFFFFF;
+ else
+ RelAddr = RE->Word0;
+
+ Res = reinterpret_cast<uintptr_t>(sectAddress + RelAddr);
+ return object_error::success;
+}
+error_code MachOObjectFile::getRelocationOffset(DataRefImpl Rel,
+ uint64_t &Res) const {
+ InMemoryStruct<macho::RelocationEntry> RE;
+ getRelocation(Rel, RE);
+
+ unsigned Arch = getArch();
+ bool isScattered = (Arch != Triple::x86_64) &&
+ (RE->Word0 & macho::RF_Scattered);
+ if (isScattered)
+ Res = RE->Word0 & 0xFFFFFF;
+ else
+ Res = RE->Word0;
return object_error::success;
}
error_code MachOObjectFile::getRelocationSymbol(DataRefImpl Rel,
StringRef res;
InMemoryStruct<macho::RelocationEntry> RE;
getRelocation(Rel, RE);
- unsigned r_type = (RE->Word1 >> 28) & 0xF;
unsigned Arch = getArch();
+ bool isScattered = (Arch != Triple::x86_64) &&
+ (RE->Word0 & macho::RF_Scattered);
+
+ unsigned r_type;
+ if (isScattered)
+ r_type = (RE->Word0 >> 24) & 0xF;
+ else
+ r_type = (RE->Word1 >> 28) & 0xF;
+
switch (Arch) {
case Triple::x86: {
const char* Table[] = {
"GENERIC_RELOC_VANILLA",
"GENERIC_RELOC_PAIR",
"GENERIC_RELOC_SECTDIFF",
+ "GENERIC_RELOC_PB_LA_PTR",
"GENERIC_RELOC_LOCAL_SECTDIFF",
- "GENERIC_RELOC_PB_LA_PTR" };
+ "GENERIC_RELOC_TLV" };
- if (r_type > 4)
+ if (r_type > 6)
res = "Unknown";
else
res = Table[r_type];
report_fatal_error(ec.message());
}
-error_code
-MachOObjectFile::getRelocationTargetName(uint32_t Idx, StringRef &S) const {
- bool isExtern = (Idx >> 27) & 1;
- uint32_t Val = Idx & 0xFFFFFF;
- error_code ec;
+void MachOObjectFile::printRelocationTargetName(
+ InMemoryStruct<macho::RelocationEntry>& RE,
+ raw_string_ostream &fmt) const {
+ unsigned Arch = getArch();
+ bool isScattered = (Arch != Triple::x86_64) &&
+ (RE->Word0 & macho::RF_Scattered);
+
+ // Target of a scattered relocation is an address. In the interest of
+ // generating pretty output, scan through the symbol table looking for a
+ // symbol that aligns with that address. If we find one, print it.
+ // Otherwise, we just print the hex address of the target.
+ if (isScattered) {
+ uint32_t Val = RE->Word1;
+
+ error_code ec;
+ for (symbol_iterator SI = begin_symbols(), SE = end_symbols(); SI != SE;
+ SI.increment(ec)) {
+ if (ec) report_fatal_error(ec.message());
+
+ uint64_t Addr;
+ StringRef Name;
+
+ if ((ec = SI->getAddress(Addr)))
+ report_fatal_error(ec.message());
+ if (Addr != Val) continue;
+ if ((ec = SI->getName(Name)))
+ report_fatal_error(ec.message());
+ fmt << Name;
+ return;
+ }
+
+ // If we couldn't find a symbol that this relocation refers to, try
+ // to find a section beginning instead.
+ for (section_iterator SI = begin_sections(), SE = end_sections(); SI != SE;
+ SI.increment(ec)) {
+ if (ec) report_fatal_error(ec.message());
+
+ uint64_t Addr;
+ StringRef Name;
+
+ if ((ec = SI->getAddress(Addr)))
+ report_fatal_error(ec.message());
+ if (Addr != Val) continue;
+ if ((ec = SI->getName(Name)))
+ report_fatal_error(ec.message());
+ fmt << Name;
+ return;
+ }
+
+ fmt << format("0x%x", Val);
+ return;
+ }
+
+ StringRef S;
+ bool isExtern = (RE->Word1 >> 27) & 1;
+ uint32_t Val = RE->Word1 & 0xFFFFFF;
if (isExtern) {
symbol_iterator SI = begin_symbols();
advanceTo(SI, Val);
- ec = SI->getName(S);
+ SI->getName(S);
} else {
section_iterator SI = begin_sections();
advanceTo(SI, Val);
- ec = SI->getName(S);
+ SI->getName(S);
}
- return ec;
+ fmt << S;
}
error_code MachOObjectFile::getRelocationValueString(DataRefImpl Rel,
InMemoryStruct<macho::RelocationEntry> RE;
getRelocation(Rel, RE);
- unsigned Type = (RE->Word1 >> 28) & 0xF;
+ unsigned Arch = getArch();
+ bool isScattered = (Arch != Triple::x86_64) &&
+ (RE->Word0 & macho::RF_Scattered);
std::string fmtbuf;
raw_string_ostream fmt(fmtbuf);
+ unsigned Type;
+ if (isScattered)
+ Type = (RE->Word0 >> 24) & 0xF;
+ else
+ Type = (RE->Word1 >> 28) & 0xF;
+
+ bool isPCRel;
+ if (isScattered)
+ isPCRel = ((RE->Word0 >> 30) & 1);
+ else
+ isPCRel = ((RE->Word1 >> 24) & 1);
+
// Determine any addends that should be displayed with the relocation.
// These require decoding the relocation type, which is triple-specific.
- unsigned Arch = getArch();
// X86_64 has entirely custom relocation types.
if (Arch == Triple::x86_64) {
- StringRef Name;
- if (error_code ec = getRelocationTargetName(RE->Word1, Name))
- report_fatal_error(ec.message());
bool isPCRel = ((RE->Word1 >> 24) & 1);
switch (Type) {
- case 3: // X86_64_RELOC_GOT_LOAD
- case 4: { // X86_64_RELOC_GOT
- fmt << Name << "@GOT";
+ case macho::RIT_X86_64_GOTLoad: // X86_64_RELOC_GOT_LOAD
+ case macho::RIT_X86_64_GOT: { // X86_64_RELOC_GOT
+ printRelocationTargetName(RE, fmt);
+ fmt << "@GOT";
if (isPCRel) fmt << "PCREL";
break;
}
- case 5: { // X86_64_RELOC_SUBTRACTOR
+ case macho::RIT_X86_64_Subtractor: { // X86_64_RELOC_SUBTRACTOR
InMemoryStruct<macho::RelocationEntry> RENext;
DataRefImpl RelNext = Rel;
RelNext.d.a++;
// X86_64_SUBTRACTOR must be followed by a relocation of type
// X86_64_RELOC_UNSIGNED.
+ // NOTE: Scattered relocations don't exist on x86_64.
unsigned RType = (RENext->Word1 >> 28) & 0xF;
if (RType != 0)
report_fatal_error("Expected X86_64_RELOC_UNSIGNED after "
"X86_64_RELOC_SUBTRACTOR.");
- StringRef SucName;
- if (error_code ec = getRelocationTargetName(RENext->Word1, SucName))
- report_fatal_error(ec.message());
-
// The X86_64_RELOC_UNSIGNED contains the minuend symbol,
// X86_64_SUBTRACTOR contains to the subtrahend.
- fmt << SucName << "-" << Name;
+ printRelocationTargetName(RENext, fmt);
+ fmt << "-";
+ printRelocationTargetName(RE, fmt);
}
- case 6: // X86_64_RELOC_SIGNED1
- fmt << Name << "-1";
+ case macho::RIT_X86_64_TLV:
+ printRelocationTargetName(RE, fmt);
+ fmt << "@TLV";
+ if (isPCRel) fmt << "P";
+ break;
+ case macho::RIT_X86_64_Signed1: // X86_64_RELOC_SIGNED1
+ printRelocationTargetName(RE, fmt);
+ fmt << "-1";
break;
- case 7: // X86_64_RELOC_SIGNED2
- fmt << Name << "-2";
+ case macho::RIT_X86_64_Signed2: // X86_64_RELOC_SIGNED2
+ printRelocationTargetName(RE, fmt);
+ fmt << "-2";
break;
- case 8: // X86_64_RELOC_SIGNED4
- fmt << Name << "-4";
+ case macho::RIT_X86_64_Signed4: // X86_64_RELOC_SIGNED4
+ printRelocationTargetName(RE, fmt);
+ fmt << "-4";
break;
default:
- fmt << Name;
+ printRelocationTargetName(RE, fmt);
break;
}
// X86 and ARM share some relocation types in common.
} else if (Arch == Triple::x86 || Arch == Triple::arm) {
// Generic relocation types...
switch (Type) {
- case 1: // GENERIC_RELOC_PAIR - prints no info
+ case macho::RIT_Pair: // GENERIC_RELOC_PAIR - prints no info
return object_error::success;
- case 2: // GENERIC_RELOC_SECTDIFF
- case 4: { // GENERIC_RELOC_LOCAL_SECTDIFF
+ case macho::RIT_Difference: { // GENERIC_RELOC_SECTDIFF
InMemoryStruct<macho::RelocationEntry> RENext;
DataRefImpl RelNext = Rel;
RelNext.d.a++;
// X86 sect diff's must be followed by a relocation of type
// GENERIC_RELOC_PAIR.
- unsigned RType = (RENext->Word1 >> 28) & 0xF;
+ bool isNextScattered = (Arch != Triple::x86_64) &&
+ (RENext->Word0 & macho::RF_Scattered);
+ unsigned RType;
+ if (isNextScattered)
+ RType = (RENext->Word0 >> 24) & 0xF;
+ else
+ RType = (RENext->Word1 >> 28) & 0xF;
if (RType != 1)
report_fatal_error("Expected GENERIC_RELOC_PAIR after "
- "GENERIC_RELOC_SECTDIFF or "
- "GENERIC_RELOC_LOCAL_SECTDIFF.");
+ "GENERIC_RELOC_SECTDIFF.");
- StringRef SucName;
- if (error_code ec = getRelocationTargetName(RENext->Word1, SucName))
- report_fatal_error(ec.message());
-
- StringRef Name;
- if (error_code ec = getRelocationTargetName(RE->Word1, Name))
- report_fatal_error(ec.message());
-
- fmt << Name << "-" << SucName;
+ printRelocationTargetName(RE, fmt);
+ fmt << "-";
+ printRelocationTargetName(RENext, fmt);
break;
}
}
- if (Arch == Triple::x86 && Type != 1) {
+ if (Arch == Triple::x86) {
// All X86 relocations that need special printing were already
// handled in the generic code.
- StringRef Name;
- if (error_code ec = getRelocationTargetName(RE->Word1, Name))
- report_fatal_error(ec.message());
- fmt << Name;
- } else { // ARM-specific relocations
switch (Type) {
- case 8: // ARM_RELOC_HALF
- case 9: { // ARM_RELOC_HALF_SECTDIFF
- StringRef Name;
- if (error_code ec = getRelocationTargetName(RE->Word1, Name))
- report_fatal_error(ec.message());
+ case macho::RIT_Generic_LocalDifference:{// GENERIC_RELOC_LOCAL_SECTDIFF
+ InMemoryStruct<macho::RelocationEntry> RENext;
+ DataRefImpl RelNext = Rel;
+ RelNext.d.a++;
+ getRelocation(RelNext, RENext);
+
+ // X86 sect diff's must be followed by a relocation of type
+ // GENERIC_RELOC_PAIR.
+ bool isNextScattered = (Arch != Triple::x86_64) &&
+ (RENext->Word0 & macho::RF_Scattered);
+ unsigned RType;
+ if (isNextScattered)
+ RType = (RENext->Word0 >> 24) & 0xF;
+ else
+ RType = (RENext->Word1 >> 28) & 0xF;
+ if (RType != 1)
+ report_fatal_error("Expected GENERIC_RELOC_PAIR after "
+ "GENERIC_RELOC_LOCAL_SECTDIFF.");
+ printRelocationTargetName(RE, fmt);
+ fmt << "-";
+ printRelocationTargetName(RENext, fmt);
+ break;
+ }
+ case macho::RIT_Generic_TLV: {
+ printRelocationTargetName(RE, fmt);
+ fmt << "@TLV";
+ if (isPCRel) fmt << "P";
+ break;
+ }
+ default:
+ printRelocationTargetName(RE, fmt);
+ }
+ } else { // ARM-specific relocations
+ switch (Type) {
+ case macho::RIT_ARM_Half: // ARM_RELOC_HALF
+ case macho::RIT_ARM_HalfDifference: { // ARM_RELOC_HALF_SECTDIFF
// Half relocations steal a bit from the length field to encode
// whether this is an upper16 or a lower16 relocation.
- bool isUpper = (RE->Word1 >> 25) & 1;
+ bool isUpper;
+ if (isScattered)
+ isUpper = (RE->Word0 >> 28) & 1;
+ else
+ isUpper = (RE->Word1 >> 25) & 1;
+
if (isUpper)
- fmt << ":upper16:(" << Name;
+ fmt << ":upper16:(";
else
- fmt << ":lower16:(" << Name;
+ fmt << ":lower16:(";
+ printRelocationTargetName(RE, fmt);
InMemoryStruct<macho::RelocationEntry> RENext;
DataRefImpl RelNext = Rel;
// ARM half relocs must be followed by a relocation of type
// ARM_RELOC_PAIR.
- unsigned RType = (RENext->Word1 >> 28) & 0xF;
+ bool isNextScattered = (Arch != Triple::x86_64) &&
+ (RENext->Word0 & macho::RF_Scattered);
+ unsigned RType;
+ if (isNextScattered)
+ RType = (RENext->Word0 >> 24) & 0xF;
+ else
+ RType = (RENext->Word1 >> 28) & 0xF;
+
if (RType != 1)
report_fatal_error("Expected ARM_RELOC_PAIR after "
"GENERIC_RELOC_HALF");
- // A constant addend for the relocation is stored in the address
- // field of the follow-on relocation. If this is a lower16 relocation
- // we need to shift it left by 16 before using it.
- int32_t Addend = RENext->Word0;
- if (!isUpper) Addend <<= 16;
+ // NOTE: The half of the target virtual address is stashed in the
+ // address field of the secondary relocation, but we can't reverse
+ // engineer the constant offset from it without decoding the movw/movt
+ // instruction to find the other half in its immediate field.
// ARM_RELOC_HALF_SECTDIFF encodes the second section in the
// symbol/section pointer of the follow-on relocation.
- StringRef SucName;
- if (Type == 9) { // ARM_RELOC_HALF_SECTDIFF
- if (error_code ec = getRelocationTargetName(RENext->Word1, SucName))
- report_fatal_error(ec.message());
+ if (Type == macho::RIT_ARM_HalfDifference) {
+ fmt << "-";
+ printRelocationTargetName(RENext, fmt);
}
- if (SucName.size()) fmt << "-" << SucName;
- if (Addend > 0) fmt << "+" << Addend;
- else if (Addend < 0) fmt << Addend;
fmt << ")";
break;
}
default: {
- StringRef Name;
- if (error_code ec = getRelocationTargetName(RE->Word1, Name))
- report_fatal_error(ec.message());
- fmt << Name;
+ printRelocationTargetName(RE, fmt);
}
}
}
- } else {
- StringRef Name;
- if (error_code ec = getRelocationTargetName(RE->Word1, Name))
- report_fatal_error(ec.message());
- fmt << Name;
- }
+ } else
+ printRelocationTargetName(RE, fmt);
fmt.flush();
Result.append(fmtbuf.begin(), fmtbuf.end());
InMemoryStruct<macho::RelocationEntry> RE;
getRelocation(Rel, RE);
- unsigned Type = (RE->Word1 >> 28) & 0xF;
unsigned Arch = getArch();
+ bool isScattered = (Arch != Triple::x86_64) &&
+ (RE->Word0 & macho::RF_Scattered);
+ unsigned Type;
+ if (isScattered)
+ Type = (RE->Word0 >> 24) & 0xF;
+ else
+ Type = (RE->Word1 >> 28) & 0xF;
Result = false;
// On arches that use the generic relocations, GENERIC_RELOC_PAIR
// is always hidden.
if (Arch == Triple::x86 || Arch == Triple::arm) {
- if (Type == 1) Result = true;
+ if (Type == macho::RIT_Pair) Result = true;
} else if (Arch == Triple::x86_64) {
// On x86_64, X86_64_RELOC_UNSIGNED is hidden only when it follows
// an X864_64_RELOC_SUBTRACTOR.
- if (Type == 0 && Rel.d.a > 0) {
+ if (Type == macho::RIT_X86_64_Unsigned && Rel.d.a > 0) {
DataRefImpl RelPrev = Rel;
RelPrev.d.a--;
InMemoryStruct<macho::RelocationEntry> REPrev;
unsigned PrevType = (REPrev->Word1 >> 28) & 0xF;
- if (PrevType == 5) Result = true;
+ if (PrevType == macho::RIT_X86_64_Subtractor) Result = true;
}
}
projects / oota-llvm.git / blobdiff