#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/Triple.h"
+#include "llvm/Config/config.h"
#include "llvm/DebugInfo/DIContext.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCContext.h"
#include <algorithm>
#include <cstring>
#include <system_error>
+
+#if HAVE_CXXABI_H
+#include <cxxabi.h>
+#endif
+
using namespace llvm;
using namespace object;
static cl::opt<bool>
- UseDbg("g", cl::desc("Print line information from debug info if available"));
+ UseDbg("g",
+ cl::desc("Print line information from debug info if available"));
-static cl::opt<std::string>
- DSYMFile("dsym", cl::desc("Use .dSYM file for debug info"));
+static cl::opt<std::string> DSYMFile("dsym",
+ cl::desc("Use .dSYM file for debug info"));
-static cl::opt<bool>
- FullLeadingAddr("full-leading-addr",
- cl::desc("Print full leading address"));
+static cl::opt<bool> FullLeadingAddr("full-leading-addr",
+ cl::desc("Print full leading address"));
static cl::opt<bool>
PrintImmHex("print-imm-hex",
typedef std::vector<DiceTableEntry> DiceTable;
typedef DiceTable::iterator dice_table_iterator;
-static bool
-compareDiceTableEntries(const DiceTableEntry i,
- const DiceTableEntry j) {
- return i.first == j.first;
+// This is used to search for a data in code table entry for the PC being
+// disassembled. The j parameter has the PC in j.first. A single data in code
+// table entry can cover many bytes for each of its Kind's. So if the offset,
+// aka the i.first value, of the data in code table entry plus its Length
+// covers the PC being searched for this will return true. If not it will
+// return false.
+static bool compareDiceTableEntries(const DiceTableEntry &i,
+ const DiceTableEntry &j) {
+ uint16_t Length;
+ i.second.getLength(Length);
+
+ return j.first >= i.first && j.first < i.first + Length;
}
-static void DumpDataInCode(const char *bytes, uint64_t Size,
- unsigned short Kind) {
- uint64_t Value;
+static uint64_t DumpDataInCode(const char *bytes, uint64_t Length,
+ unsigned short Kind) {
+ uint32_t Value, Size = 1;
switch (Kind) {
+ default:
case MachO::DICE_KIND_DATA:
- switch (Size) {
- case 4:
- Value = bytes[3] << 24 |
- bytes[2] << 16 |
- bytes[1] << 8 |
- bytes[0];
+ if (Length >= 4) {
+ if (!NoShowRawInsn)
+ DumpBytes(StringRef(bytes, 4));
+ Value = bytes[3] << 24 | bytes[2] << 16 | bytes[1] << 8 | bytes[0];
outs() << "\t.long " << Value;
- break;
- case 2:
- Value = bytes[1] << 8 |
- bytes[0];
+ Size = 4;
+ } else if (Length >= 2) {
+ if (!NoShowRawInsn)
+ DumpBytes(StringRef(bytes, 2));
+ Value = bytes[1] << 8 | bytes[0];
outs() << "\t.short " << Value;
- break;
- case 1:
+ Size = 2;
+ } else {
+ if (!NoShowRawInsn)
+ DumpBytes(StringRef(bytes, 2));
Value = bytes[0];
outs() << "\t.byte " << Value;
- break;
+ Size = 1;
}
- outs() << "\t@ KIND_DATA\n";
+ if (Kind == MachO::DICE_KIND_DATA)
+ outs() << "\t@ KIND_DATA\n";
+ else
+ outs() << "\t@ data in code kind = " << Kind << "\n";
break;
case MachO::DICE_KIND_JUMP_TABLE8:
+ if (!NoShowRawInsn)
+ DumpBytes(StringRef(bytes, 1));
Value = bytes[0];
- outs() << "\t.byte " << Value << "\t@ KIND_JUMP_TABLE8";
+ outs() << "\t.byte " << format("%3u", Value) << "\t@ KIND_JUMP_TABLE8\n";
+ Size = 1;
break;
case MachO::DICE_KIND_JUMP_TABLE16:
- Value = bytes[1] << 8 |
- bytes[0];
- outs() << "\t.short " << Value << "\t@ KIND_JUMP_TABLE16";
+ if (!NoShowRawInsn)
+ DumpBytes(StringRef(bytes, 2));
+ Value = bytes[1] << 8 | bytes[0];
+ outs() << "\t.short " << format("%5u", Value & 0xffff)
+ << "\t@ KIND_JUMP_TABLE16\n";
+ Size = 2;
break;
case MachO::DICE_KIND_JUMP_TABLE32:
- Value = bytes[3] << 24 |
- bytes[2] << 16 |
- bytes[1] << 8 |
- bytes[0];
- outs() << "\t.long " << Value << "\t@ KIND_JUMP_TABLE32";
- break;
- default:
- outs() << "\t@ data in code kind = " << Kind << "\n";
+ case MachO::DICE_KIND_ABS_JUMP_TABLE32:
+ if (!NoShowRawInsn)
+ DumpBytes(StringRef(bytes, 4));
+ Value = bytes[3] << 24 | bytes[2] << 16 | bytes[1] << 8 | bytes[0];
+ outs() << "\t.long " << Value;
+ if (Kind == MachO::DICE_KIND_JUMP_TABLE32)
+ outs() << "\t@ KIND_JUMP_TABLE32\n";
+ else
+ outs() << "\t@ KIND_ABS_JUMP_TABLE32\n";
+ Size = 4;
break;
}
+ return Size;
}
static void getSectionsAndSymbols(const MachO::mach_header Header,
MachOObjectFile::LoadCommandInfo Command =
MachOObj->getFirstLoadCommandInfo();
bool BaseSegmentAddressSet = false;
- for (unsigned i = 0; ; ++i) {
+ for (unsigned i = 0;; ++i) {
if (Command.C.cmd == MachO::LC_FUNCTION_STARTS) {
// We found a function starts segment, parse the addresses for later
// consumption.
MachO::linkedit_data_command LLC =
- MachOObj->getLinkeditDataLoadCommand(Command);
+ MachOObj->getLinkeditDataLoadCommand(Command);
MachOObj->ReadULEB128s(LLC.dataoff, FoundFns);
- }
- else if (Command.C.cmd == MachO::LC_SEGMENT) {
- MachO::segment_command SLC =
- MachOObj->getSegmentLoadCommand(Command);
+ } else if (Command.C.cmd == MachO::LC_SEGMENT) {
+ MachO::segment_command SLC = MachOObj->getSegmentLoadCommand(Command);
StringRef SegName = SLC.segname;
- if(!BaseSegmentAddressSet && SegName != "__PAGEZERO") {
+ if (!BaseSegmentAddressSet && SegName != "__PAGEZERO") {
BaseSegmentAddressSet = true;
BaseSegmentAddress = SLC.vmaddr;
}
}
typedef DenseMap<uint64_t, StringRef> SymbolAddressMap;
+typedef std::pair<uint64_t, const char *> BindInfoEntry;
+typedef std::vector<BindInfoEntry> BindTable;
+typedef BindTable::iterator bind_table_iterator;
// The block of info used by the Symbolizer call backs.
struct DisassembleInfo {
MachOObjectFile *O;
SectionRef S;
SymbolAddressMap *AddrMap;
+ std::vector<SectionRef> *Sections;
+ const char *class_name;
+ const char *selector_name;
+ char *method;
+ char *demangled_name;
+ BindTable *bindtable;
};
+// GuessSymbolName is passed the address of what might be a symbol and a
+// pointer to the DisassembleInfo struct. It returns the name of a symbol
+// with that address or nullptr if no symbol is found with that address.
+static const char *GuessSymbolName(uint64_t value,
+ struct DisassembleInfo *info) {
+ const char *SymbolName = nullptr;
+ // A DenseMap can't lookup up some values.
+ if (value != 0xffffffffffffffffULL && value != 0xfffffffffffffffeULL) {
+ StringRef name = info->AddrMap->lookup(value);
+ if (!name.empty())
+ SymbolName = name.data();
+ }
+ return SymbolName;
+}
+
// SymbolizerGetOpInfo() is the operand information call back function.
// This is called to get the symbolic information for operand(s) of an
// instruction when it is being done. This routine does this from
unsigned int Arch = info->O->getArch();
if (Arch == Triple::x86) {
+ if (Size != 1 && Size != 2 && Size != 4 && Size != 0)
+ return 0;
+ // First search the section's relocation entries (if any) for an entry
+ // for this section offset.
+ uint32_t sect_addr = info->S.getAddress();
+ uint32_t sect_offset = (Pc + Offset) - sect_addr;
+ bool reloc_found = false;
+ DataRefImpl Rel;
+ MachO::any_relocation_info RE;
+ bool isExtern = false;
+ SymbolRef Symbol;
+ bool r_scattered = false;
+ uint32_t r_value, pair_r_value, r_type;
+ for (const RelocationRef &Reloc : info->S.relocations()) {
+ uint64_t RelocOffset;
+ Reloc.getOffset(RelocOffset);
+ if (RelocOffset == sect_offset) {
+ Rel = Reloc.getRawDataRefImpl();
+ RE = info->O->getRelocation(Rel);
+ r_type = info->O->getAnyRelocationType(RE);
+ r_scattered = info->O->isRelocationScattered(RE);
+ if (r_scattered) {
+ r_value = info->O->getScatteredRelocationValue(RE);
+ if (r_type == MachO::GENERIC_RELOC_SECTDIFF ||
+ r_type == MachO::GENERIC_RELOC_LOCAL_SECTDIFF) {
+ DataRefImpl RelNext = Rel;
+ info->O->moveRelocationNext(RelNext);
+ MachO::any_relocation_info RENext;
+ RENext = info->O->getRelocation(RelNext);
+ if (info->O->isRelocationScattered(RENext))
+ pair_r_value = info->O->getScatteredRelocationValue(RENext);
+ else
+ return 0;
+ }
+ } else {
+ isExtern = info->O->getPlainRelocationExternal(RE);
+ if (isExtern) {
+ symbol_iterator RelocSym = Reloc.getSymbol();
+ Symbol = *RelocSym;
+ }
+ }
+ reloc_found = true;
+ break;
+ }
+ }
+ if (reloc_found && isExtern) {
+ StringRef SymName;
+ Symbol.getName(SymName);
+ const char *name = SymName.data();
+ op_info->AddSymbol.Present = 1;
+ op_info->AddSymbol.Name = name;
+ // For i386 extern relocation entries the value in the instruction is
+ // the offset from the symbol, and value is already set in op_info->Value.
+ return 1;
+ }
+ if (reloc_found && (r_type == MachO::GENERIC_RELOC_SECTDIFF ||
+ r_type == MachO::GENERIC_RELOC_LOCAL_SECTDIFF)) {
+ const char *add = GuessSymbolName(r_value, info);
+ const char *sub = GuessSymbolName(pair_r_value, info);
+ uint32_t offset = value - (r_value - pair_r_value);
+ op_info->AddSymbol.Present = 1;
+ if (add != nullptr)
+ op_info->AddSymbol.Name = add;
+ else
+ op_info->AddSymbol.Value = r_value;
+ op_info->SubtractSymbol.Present = 1;
+ if (sub != nullptr)
+ op_info->SubtractSymbol.Name = sub;
+ else
+ op_info->SubtractSymbol.Value = pair_r_value;
+ op_info->Value = offset;
+ return 1;
+ }
+ // TODO:
+ // Second search the external relocation entries of a fully linked image
+ // (if any) for an entry that matches this segment offset.
+ // uint32_t seg_offset = (Pc + Offset);
return 0;
} else if (Arch == Triple::x86_64) {
if (Size != 1 && Size != 2 && Size != 4 && Size != 0)
// TODO:
// Second search the external relocation entries of a fully linked image
// (if any) for an entry that matches this segment offset.
- //uint64_t seg_offset = (Pc + Offset);
+ // uint64_t seg_offset = (Pc + Offset);
return 0;
} else if (Arch == Triple::arm) {
- return 0;
+ if (Offset != 0 || (Size != 4 && Size != 2))
+ return 0;
+ // First search the section's relocation entries (if any) for an entry
+ // for this section offset.
+ uint32_t sect_addr = info->S.getAddress();
+ uint32_t sect_offset = (Pc + Offset) - sect_addr;
+ bool reloc_found = false;
+ DataRefImpl Rel;
+ MachO::any_relocation_info RE;
+ bool isExtern = false;
+ SymbolRef Symbol;
+ bool r_scattered = false;
+ uint32_t r_value, pair_r_value, r_type, r_length, other_half;
+ for (const RelocationRef &Reloc : info->S.relocations()) {
+ uint64_t RelocOffset;
+ Reloc.getOffset(RelocOffset);
+ if (RelocOffset == sect_offset) {
+ Rel = Reloc.getRawDataRefImpl();
+ RE = info->O->getRelocation(Rel);
+ r_length = info->O->getAnyRelocationLength(RE);
+ r_scattered = info->O->isRelocationScattered(RE);
+ if (r_scattered) {
+ r_value = info->O->getScatteredRelocationValue(RE);
+ r_type = info->O->getScatteredRelocationType(RE);
+ } else {
+ r_type = info->O->getAnyRelocationType(RE);
+ isExtern = info->O->getPlainRelocationExternal(RE);
+ if (isExtern) {
+ symbol_iterator RelocSym = Reloc.getSymbol();
+ Symbol = *RelocSym;
+ }
+ }
+ if (r_type == MachO::ARM_RELOC_HALF ||
+ r_type == MachO::ARM_RELOC_SECTDIFF ||
+ r_type == MachO::ARM_RELOC_LOCAL_SECTDIFF ||
+ r_type == MachO::ARM_RELOC_HALF_SECTDIFF) {
+ DataRefImpl RelNext = Rel;
+ info->O->moveRelocationNext(RelNext);
+ MachO::any_relocation_info RENext;
+ RENext = info->O->getRelocation(RelNext);
+ other_half = info->O->getAnyRelocationAddress(RENext) & 0xffff;
+ if (info->O->isRelocationScattered(RENext))
+ pair_r_value = info->O->getScatteredRelocationValue(RENext);
+ }
+ reloc_found = true;
+ break;
+ }
+ }
+ if (reloc_found && isExtern) {
+ StringRef SymName;
+ Symbol.getName(SymName);
+ const char *name = SymName.data();
+ op_info->AddSymbol.Present = 1;
+ op_info->AddSymbol.Name = name;
+ if (value != 0) {
+ switch (r_type) {
+ case MachO::ARM_RELOC_HALF:
+ if ((r_length & 0x1) == 1) {
+ op_info->Value = value << 16 | other_half;
+ op_info->VariantKind = LLVMDisassembler_VariantKind_ARM_HI16;
+ } else {
+ op_info->Value = other_half << 16 | value;
+ op_info->VariantKind = LLVMDisassembler_VariantKind_ARM_LO16;
+ }
+ break;
+ default:
+ break;
+ }
+ } else {
+ switch (r_type) {
+ case MachO::ARM_RELOC_HALF:
+ if ((r_length & 0x1) == 1) {
+ op_info->Value = value << 16 | other_half;
+ op_info->VariantKind = LLVMDisassembler_VariantKind_ARM_HI16;
+ } else {
+ op_info->Value = other_half << 16 | value;
+ op_info->VariantKind = LLVMDisassembler_VariantKind_ARM_LO16;
+ }
+ break;
+ default:
+ break;
+ }
+ }
+ return 1;
+ }
+ // If we have a branch that is not an external relocation entry then
+ // return 0 so the code in tryAddingSymbolicOperand() can use the
+ // SymbolLookUp call back with the branch target address to look up the
+ // symbol and possiblity add an annotation for a symbol stub.
+ if (reloc_found && isExtern == 0 && (r_type == MachO::ARM_RELOC_BR24 ||
+ r_type == MachO::ARM_THUMB_RELOC_BR22))
+ return 0;
+
+ uint32_t offset = 0;
+ if (reloc_found) {
+ if (r_type == MachO::ARM_RELOC_HALF ||
+ r_type == MachO::ARM_RELOC_HALF_SECTDIFF) {
+ if ((r_length & 0x1) == 1)
+ value = value << 16 | other_half;
+ else
+ value = other_half << 16 | value;
+ }
+ if (r_scattered && (r_type != MachO::ARM_RELOC_HALF &&
+ r_type != MachO::ARM_RELOC_HALF_SECTDIFF)) {
+ offset = value - r_value;
+ value = r_value;
+ }
+ }
+
+ if (reloc_found && r_type == MachO::ARM_RELOC_HALF_SECTDIFF) {
+ if ((r_length & 0x1) == 1)
+ op_info->VariantKind = LLVMDisassembler_VariantKind_ARM_HI16;
+ else
+ op_info->VariantKind = LLVMDisassembler_VariantKind_ARM_LO16;
+ const char *add = GuessSymbolName(r_value, info);
+ const char *sub = GuessSymbolName(pair_r_value, info);
+ int32_t offset = value - (r_value - pair_r_value);
+ op_info->AddSymbol.Present = 1;
+ if (add != nullptr)
+ op_info->AddSymbol.Name = add;
+ else
+ op_info->AddSymbol.Value = r_value;
+ op_info->SubtractSymbol.Present = 1;
+ if (sub != nullptr)
+ op_info->SubtractSymbol.Name = sub;
+ else
+ op_info->SubtractSymbol.Value = pair_r_value;
+ op_info->Value = offset;
+ return 1;
+ }
+
+ if (reloc_found == false)
+ return 0;
+
+ op_info->AddSymbol.Present = 1;
+ op_info->Value = offset;
+ if (reloc_found) {
+ if (r_type == MachO::ARM_RELOC_HALF) {
+ if ((r_length & 0x1) == 1)
+ op_info->VariantKind = LLVMDisassembler_VariantKind_ARM_HI16;
+ else
+ op_info->VariantKind = LLVMDisassembler_VariantKind_ARM_LO16;
+ }
+ }
+ const char *add = GuessSymbolName(value, info);
+ if (add != nullptr) {
+ op_info->AddSymbol.Name = add;
+ return 1;
+ }
+ op_info->AddSymbol.Value = value;
+ return 1;
} else if (Arch == Triple::aarch64) {
return 0;
} else {
uint32_t index = Sec.reserved1 + (ReferenceValue - Sec.addr) / stride;
if (index < Dysymtab.nindirectsyms) {
uint32_t indirect_symbol =
- info->O->getIndirectSymbolTableEntry(Dysymtab, index);
+ info->O->getIndirectSymbolTableEntry(Dysymtab, index);
if (indirect_symbol < Symtab.nsyms) {
symbol_iterator Sym = info->O->getSymbolByIndex(indirect_symbol);
SymbolRef Symbol = *Sym;
uint32_t index = Sec.reserved1 + (ReferenceValue - Sec.addr) / stride;
if (index < Dysymtab.nindirectsyms) {
uint32_t indirect_symbol =
- info->O->getIndirectSymbolTableEntry(Dysymtab, index);
+ info->O->getIndirectSymbolTableEntry(Dysymtab, index);
if (indirect_symbol < Symtab.nsyms) {
symbol_iterator Sym = info->O->getSymbolByIndex(indirect_symbol);
SymbolRef Symbol = *Sym;
return nullptr;
}
+// method_reference() is called passing it the ReferenceName that might be
+// a reference it to an Objective-C method call. If so then it allocates and
+// assembles a method call string with the values last seen and saved in
+// the DisassembleInfo's class_name and selector_name fields. This is saved
+// into the method field of the info and any previous string is free'ed.
+// Then the class_name field in the info is set to nullptr. The method call
+// string is set into ReferenceName and ReferenceType is set to
+// LLVMDisassembler_ReferenceType_Out_Objc_Message. If this not a method call
+// then both ReferenceType and ReferenceName are left unchanged.
+static void method_reference(struct DisassembleInfo *info,
+ uint64_t *ReferenceType,
+ const char **ReferenceName) {
+ if (*ReferenceName != nullptr) {
+ if (strcmp(*ReferenceName, "_objc_msgSend") == 0) {
+ if (info->selector_name != NULL) {
+ if (info->method != nullptr)
+ free(info->method);
+ if (info->class_name != nullptr) {
+ info->method = (char *)malloc(5 + strlen(info->class_name) +
+ strlen(info->selector_name));
+ if (info->method != nullptr) {
+ strcpy(info->method, "+[");
+ strcat(info->method, info->class_name);
+ strcat(info->method, " ");
+ strcat(info->method, info->selector_name);
+ strcat(info->method, "]");
+ *ReferenceName = info->method;
+ *ReferenceType = LLVMDisassembler_ReferenceType_Out_Objc_Message;
+ }
+ } else {
+ info->method = (char *)malloc(9 + strlen(info->selector_name));
+ if (info->method != nullptr) {
+ strcpy(info->method, "-[%rdi ");
+ strcat(info->method, info->selector_name);
+ strcat(info->method, "]");
+ *ReferenceName = info->method;
+ *ReferenceType = LLVMDisassembler_ReferenceType_Out_Objc_Message;
+ }
+ }
+ info->class_name = nullptr;
+ }
+ } else if (strcmp(*ReferenceName, "_objc_msgSendSuper2") == 0) {
+ if (info->selector_name != NULL) {
+ if (info->method != nullptr)
+ free(info->method);
+ info->method = (char *)malloc(17 + strlen(info->selector_name));
+ if (info->method != nullptr) {
+ strcpy(info->method, "-[[%rdi super] ");
+ strcat(info->method, info->selector_name);
+ strcat(info->method, "]");
+ *ReferenceName = info->method;
+ *ReferenceType = LLVMDisassembler_ReferenceType_Out_Objc_Message;
+ }
+ info->class_name = nullptr;
+ }
+ }
+ }
+}
+
+// GuessPointerPointer() is passed the address of what might be a pointer to
+// a reference to an Objective-C class, selector, message ref or cfstring.
+// If so the value of the pointer is returned and one of the booleans are set
+// to true. If not zero is returned and all the booleans are set to false.
+static uint64_t GuessPointerPointer(uint64_t ReferenceValue,
+ struct DisassembleInfo *info,
+ bool &classref, bool &selref, bool &msgref,
+ bool &cfstring) {
+ classref = false;
+ selref = false;
+ msgref = false;
+ cfstring = false;
+ uint32_t LoadCommandCount = info->O->getHeader().ncmds;
+ MachOObjectFile::LoadCommandInfo Load = info->O->getFirstLoadCommandInfo();
+ for (unsigned I = 0;; ++I) {
+ if (Load.C.cmd == MachO::LC_SEGMENT_64) {
+ MachO::segment_command_64 Seg = info->O->getSegment64LoadCommand(Load);
+ for (unsigned J = 0; J < Seg.nsects; ++J) {
+ MachO::section_64 Sec = info->O->getSection64(Load, J);
+ if ((strncmp(Sec.sectname, "__objc_selrefs", 16) == 0 ||
+ strncmp(Sec.sectname, "__objc_classrefs", 16) == 0 ||
+ strncmp(Sec.sectname, "__objc_superrefs", 16) == 0 ||
+ strncmp(Sec.sectname, "__objc_msgrefs", 16) == 0 ||
+ strncmp(Sec.sectname, "__cfstring", 16) == 0) &&
+ ReferenceValue >= Sec.addr &&
+ ReferenceValue < Sec.addr + Sec.size) {
+ uint64_t sect_offset = ReferenceValue - Sec.addr;
+ uint64_t object_offset = Sec.offset + sect_offset;
+ StringRef MachOContents = info->O->getData();
+ uint64_t object_size = MachOContents.size();
+ const char *object_addr = (const char *)MachOContents.data();
+ if (object_offset < object_size) {
+ uint64_t pointer_value;
+ memcpy(&pointer_value, object_addr + object_offset,
+ sizeof(uint64_t));
+ if (info->O->isLittleEndian() != sys::IsLittleEndianHost)
+ sys::swapByteOrder(pointer_value);
+ if (strncmp(Sec.sectname, "__objc_selrefs", 16) == 0)
+ selref = true;
+ else if (strncmp(Sec.sectname, "__objc_classrefs", 16) == 0 ||
+ strncmp(Sec.sectname, "__objc_superrefs", 16) == 0)
+ classref = true;
+ else if (strncmp(Sec.sectname, "__objc_msgrefs", 16) == 0 &&
+ ReferenceValue + 8 < Sec.addr + Sec.size) {
+ msgref = true;
+ memcpy(&pointer_value, object_addr + object_offset + 8,
+ sizeof(uint64_t));
+ if (info->O->isLittleEndian() != sys::IsLittleEndianHost)
+ sys::swapByteOrder(pointer_value);
+ } else if (strncmp(Sec.sectname, "__cfstring", 16) == 0)
+ cfstring = true;
+ return pointer_value;
+ } else {
+ return 0;
+ }
+ }
+ }
+ }
+ // TODO: Look for LC_SEGMENT for 32-bit Mach-O files.
+ if (I == LoadCommandCount - 1)
+ break;
+ else
+ Load = info->O->getNextLoadCommandInfo(Load);
+ }
+ return 0;
+}
+
+// get_pointer_64 returns a pointer to the bytes in the object file at the
+// Address from a section in the Mach-O file. And indirectly returns the
+// offset into the section, number of bytes left in the section past the offset
+// and which section is was being referenced. If the Address is not in a
+// section nullptr is returned.
+const char *get_pointer_64(uint64_t Address, uint32_t &offset, uint32_t &left,
+ SectionRef &S, DisassembleInfo *info) {
+ offset = 0;
+ left = 0;
+ S = SectionRef();
+ for (unsigned SectIdx = 0; SectIdx != info->Sections->size(); SectIdx++) {
+ uint64_t SectAddress = ((*(info->Sections))[SectIdx]).getAddress();
+ uint64_t SectSize = ((*(info->Sections))[SectIdx]).getSize();
+ if (Address >= SectAddress && Address < SectAddress + SectSize) {
+ S = (*(info->Sections))[SectIdx];
+ offset = Address - SectAddress;
+ left = SectSize - offset;
+ StringRef SectContents;
+ ((*(info->Sections))[SectIdx]).getContents(SectContents);
+ return SectContents.data() + offset;
+ }
+ }
+ return nullptr;
+}
+
+// get_symbol_64() returns the name of a symbol (or nullptr) and the address of
+// the symbol indirectly through n_value. Based on the relocation information
+// for the specified section offset in the specified section reference.
+const char *get_symbol_64(uint32_t sect_offset, SectionRef S,
+ DisassembleInfo *info, uint64_t &n_value) {
+ n_value = 0;
+ if (info->verbose == false)
+ return nullptr;
+
+ // See if there is an external relocation entry at the sect_offset.
+ bool reloc_found = false;
+ DataRefImpl Rel;
+ MachO::any_relocation_info RE;
+ bool isExtern = false;
+ SymbolRef Symbol;
+ for (const RelocationRef &Reloc : S.relocations()) {
+ uint64_t RelocOffset;
+ Reloc.getOffset(RelocOffset);
+ if (RelocOffset == sect_offset) {
+ Rel = Reloc.getRawDataRefImpl();
+ RE = info->O->getRelocation(Rel);
+ if (info->O->isRelocationScattered(RE))
+ continue;
+ isExtern = info->O->getPlainRelocationExternal(RE);
+ if (isExtern) {
+ symbol_iterator RelocSym = Reloc.getSymbol();
+ Symbol = *RelocSym;
+ }
+ reloc_found = true;
+ break;
+ }
+ }
+ // If there is an external relocation entry for a symbol in this section
+ // at this section_offset then use that symbol's value for the n_value
+ // and return its name.
+ const char *SymbolName = nullptr;
+ if (reloc_found && isExtern) {
+ Symbol.getAddress(n_value);
+ StringRef name;
+ Symbol.getName(name);
+ if (!name.empty()) {
+ SymbolName = name.data();
+ return SymbolName;
+ }
+ }
+
+ // TODO: For fully linked images, look through the external relocation
+ // entries off the dynamic symtab command. For these the r_offset is from the
+ // start of the first writeable segment in the Mach-O file. So the offset
+ // to this section from that segment is passed to this routine by the caller,
+ // as the database_offset. Which is the difference of the section's starting
+ // address and the first writable segment.
+ //
+ // NOTE: need add passing the database_offset to this routine.
+
+ // TODO: We did not find an external relocation entry so look up the
+ // ReferenceValue as an address of a symbol and if found return that symbol's
+ // name.
+ //
+ // NOTE: need add passing the ReferenceValue to this routine. Then that code
+ // would simply be this:
+ // SymbolName = GuessSymbolName(ReferenceValue, info);
+
+ return SymbolName;
+}
+
+// These are structs in the Objective-C meta data and read to produce the
+// comments for disassembly. While these are part of the ABI they are no
+// public defintions. So the are here not in include/llvm/Support/MachO.h .
+
+// The cfstring object in a 64-bit Mach-O file.
+struct cfstring64_t {
+ uint64_t isa; // class64_t * (64-bit pointer)
+ uint64_t flags; // flag bits
+ uint64_t characters; // char * (64-bit pointer)
+ uint64_t length; // number of non-NULL characters in above
+};
+
+// The class object in a 64-bit Mach-O file.
+struct class64_t {
+ uint64_t isa; // class64_t * (64-bit pointer)
+ uint64_t superclass; // class64_t * (64-bit pointer)
+ uint64_t cache; // Cache (64-bit pointer)
+ uint64_t vtable; // IMP * (64-bit pointer)
+ uint64_t data; // class_ro64_t * (64-bit pointer)
+};
+
+struct class_ro64_t {
+ uint32_t flags;
+ uint32_t instanceStart;
+ uint32_t instanceSize;
+ uint32_t reserved;
+ uint64_t ivarLayout; // const uint8_t * (64-bit pointer)
+ uint64_t name; // const char * (64-bit pointer)
+ uint64_t baseMethods; // const method_list_t * (64-bit pointer)
+ uint64_t baseProtocols; // const protocol_list_t * (64-bit pointer)
+ uint64_t ivars; // const ivar_list_t * (64-bit pointer)
+ uint64_t weakIvarLayout; // const uint8_t * (64-bit pointer)
+ uint64_t baseProperties; // const struct objc_property_list (64-bit pointer)
+};
+
+inline void swapStruct(struct cfstring64_t &cfs) {
+ sys::swapByteOrder(cfs.isa);
+ sys::swapByteOrder(cfs.flags);
+ sys::swapByteOrder(cfs.characters);
+ sys::swapByteOrder(cfs.length);
+}
+
+inline void swapStruct(struct class64_t &c) {
+ sys::swapByteOrder(c.isa);
+ sys::swapByteOrder(c.superclass);
+ sys::swapByteOrder(c.cache);
+ sys::swapByteOrder(c.vtable);
+ sys::swapByteOrder(c.data);
+}
+
+inline void swapStruct(struct class_ro64_t &cro) {
+ sys::swapByteOrder(cro.flags);
+ sys::swapByteOrder(cro.instanceStart);
+ sys::swapByteOrder(cro.instanceSize);
+ sys::swapByteOrder(cro.reserved);
+ sys::swapByteOrder(cro.ivarLayout);
+ sys::swapByteOrder(cro.name);
+ sys::swapByteOrder(cro.baseMethods);
+ sys::swapByteOrder(cro.baseProtocols);
+ sys::swapByteOrder(cro.ivars);
+ sys::swapByteOrder(cro.weakIvarLayout);
+ sys::swapByteOrder(cro.baseProperties);
+}
+
+static const char *get_dyld_bind_info_symbolname(uint64_t ReferenceValue,
+ struct DisassembleInfo *info);
+
+// get_objc2_64bit_class_name() is used for disassembly and is passed a pointer
+// to an Objective-C class and returns the class name. It is also passed the
+// address of the pointer, so when the pointer is zero as it can be in an .o
+// file, that is used to look for an external relocation entry with a symbol
+// name.
+const char *get_objc2_64bit_class_name(uint64_t pointer_value,
+ uint64_t ReferenceValue,
+ struct DisassembleInfo *info) {
+ const char *r;
+ uint32_t offset, left;
+ SectionRef S;
+
+ // The pointer_value can be 0 in an object file and have a relocation
+ // entry for the class symbol at the ReferenceValue (the address of the
+ // pointer).
+ if (pointer_value == 0) {
+ r = get_pointer_64(ReferenceValue, offset, left, S, info);
+ if (r == nullptr || left < sizeof(uint64_t))
+ return nullptr;
+ uint64_t n_value;
+ const char *symbol_name = get_symbol_64(offset, S, info, n_value);
+ if (symbol_name == nullptr)
+ return nullptr;
+ const char *class_name = strrchr(symbol_name, '$');
+ if (class_name != nullptr && class_name[1] == '_' && class_name[2] != '\0')
+ return class_name + 2;
+ else
+ return nullptr;
+ }
+
+ // The case were the pointer_value is non-zero and points to a class defined
+ // in this Mach-O file.
+ r = get_pointer_64(pointer_value, offset, left, S, info);
+ if (r == nullptr || left < sizeof(struct class64_t))
+ return nullptr;
+ struct class64_t c;
+ memcpy(&c, r, sizeof(struct class64_t));
+ if (info->O->isLittleEndian() != sys::IsLittleEndianHost)
+ swapStruct(c);
+ if (c.data == 0)
+ return nullptr;
+ r = get_pointer_64(c.data, offset, left, S, info);
+ if (r == nullptr || left < sizeof(struct class_ro64_t))
+ return nullptr;
+ struct class_ro64_t cro;
+ memcpy(&cro, r, sizeof(struct class_ro64_t));
+ if (info->O->isLittleEndian() != sys::IsLittleEndianHost)
+ swapStruct(cro);
+ if (cro.name == 0)
+ return nullptr;
+ const char *name = get_pointer_64(cro.name, offset, left, S, info);
+ return name;
+}
+
+// get_objc2_64bit_cfstring_name is used for disassembly and is passed a
+// pointer to a cfstring and returns its name or nullptr.
+const char *get_objc2_64bit_cfstring_name(uint64_t ReferenceValue,
+ struct DisassembleInfo *info) {
+ const char *r, *name;
+ uint32_t offset, left;
+ SectionRef S;
+ struct cfstring64_t cfs;
+ uint64_t cfs_characters;
+
+ r = get_pointer_64(ReferenceValue, offset, left, S, info);
+ if (r == nullptr || left < sizeof(struct cfstring64_t))
+ return nullptr;
+ memcpy(&cfs, r, sizeof(struct cfstring64_t));
+ if (info->O->isLittleEndian() != sys::IsLittleEndianHost)
+ swapStruct(cfs);
+ if (cfs.characters == 0) {
+ uint64_t n_value;
+ const char *symbol_name = get_symbol_64(
+ offset + offsetof(struct cfstring64_t, characters), S, info, n_value);
+ if (symbol_name == nullptr)
+ return nullptr;
+ cfs_characters = n_value;
+ } else
+ cfs_characters = cfs.characters;
+ name = get_pointer_64(cfs_characters, offset, left, S, info);
+
+ return name;
+}
+
+// get_objc2_64bit_selref() is used for disassembly and is passed a the address
+// of a pointer to an Objective-C selector reference when the pointer value is
+// zero as in a .o file and is likely to have a external relocation entry with
+// who's symbol's n_value is the real pointer to the selector name. If that is
+// the case the real pointer to the selector name is returned else 0 is
+// returned
+uint64_t get_objc2_64bit_selref(uint64_t ReferenceValue,
+ struct DisassembleInfo *info) {
+ uint32_t offset, left;
+ SectionRef S;
+
+ const char *r = get_pointer_64(ReferenceValue, offset, left, S, info);
+ if (r == nullptr || left < sizeof(uint64_t))
+ return 0;
+ uint64_t n_value;
+ const char *symbol_name = get_symbol_64(offset, S, info, n_value);
+ if (symbol_name == nullptr)
+ return 0;
+ return n_value;
+}
+
// GuessLiteralPointer returns a string which for the item in the Mach-O file
// for the address passed in as ReferenceValue for printing as a comment with
// the instruction and also returns the corresponding type of that item
// cstring is returned and ReferenceType is set to
// LLVMDisassembler_ReferenceType_Out_LitPool_CstrAddr .
//
-// TODO: other literals such as Objective-C CFStrings refs, Selector refs,
-// Message refs, Class refs and a Symbol address in a literal pool are yet
-// to be done here.
+// If ReferenceValue is an address of an Objective-C CFString, Selector ref or
+// Class ref that name is returned and the ReferenceType is set accordingly.
+//
+// Lastly, literals which are Symbol address in a literal pool are looked for
+// and if found the symbol name is returned and ReferenceType is set to
+// LLVMDisassembler_ReferenceType_Out_LitPool_SymAddr .
+//
+// If there is no item in the Mach-O file for the address passed in as
+// ReferenceValue nullptr is returned and ReferenceType is unchanged.
const char *GuessLiteralPointer(uint64_t ReferenceValue, uint64_t ReferencePC,
uint64_t *ReferenceType,
struct DisassembleInfo *info) {
- // TODO: This rouine's code is only for an x86_64 Mach-O file for now.
+ // TODO: This rouine's code and the routines it calls are only work with
+ // x86_64 Mach-O files for now.
unsigned int Arch = info->O->getArch();
if (Arch != Triple::x86_64)
return nullptr;
}
}
- // TODO: the code to look for other literals such as Objective-C CFStrings
- // refs, Selector refs, Message refs, Class refs will be added here.
+ // Look for literals such as Objective-C CFStrings refs, Selector refs,
+ // Message refs and Class refs.
+ bool classref, selref, msgref, cfstring;
+ uint64_t pointer_value = GuessPointerPointer(ReferenceValue, info, classref,
+ selref, msgref, cfstring);
+ if (classref == true && pointer_value == 0) {
+ // Note the ReferenceValue is a pointer into the __objc_classrefs section.
+ // And the pointer_value in that section is typically zero as it will be
+ // set by dyld as part of the "bind information".
+ const char *name = get_dyld_bind_info_symbolname(ReferenceValue, info);
+ if (name != nullptr) {
+ *ReferenceType = LLVMDisassembler_ReferenceType_Out_Objc_Class_Ref;
+ const char *class_name = strrchr(name, '$');
+ if (class_name != nullptr && class_name[1] == '_' &&
+ class_name[2] != '\0') {
+ info->class_name = class_name + 2;
+ return name;
+ }
+ }
+ }
+
+ if (classref == true) {
+ *ReferenceType = LLVMDisassembler_ReferenceType_Out_Objc_Class_Ref;
+ const char *name =
+ get_objc2_64bit_class_name(pointer_value, ReferenceValue, info);
+ if (name != nullptr)
+ info->class_name = name;
+ else
+ name = "bad class ref";
+ return name;
+ }
+
+ if (cfstring == true) {
+ *ReferenceType = LLVMDisassembler_ReferenceType_Out_Objc_CFString_Ref;
+ const char *name = get_objc2_64bit_cfstring_name(ReferenceValue, info);
+ return name;
+ }
+
+ if (selref == true && pointer_value == 0)
+ pointer_value = get_objc2_64bit_selref(ReferenceValue, info);
+
+ if (pointer_value != 0)
+ ReferenceValue = pointer_value;
const char *name = GuessCstringPointer(ReferenceValue, info);
if (name) {
- // TODO: note when the code is added above for Selector refs and Message
- // refs we will need check for that here and set the ReferenceType
- // accordingly.
- *ReferenceType = LLVMDisassembler_ReferenceType_Out_LitPool_CstrAddr;
+ if (pointer_value != 0 && selref == true) {
+ *ReferenceType = LLVMDisassembler_ReferenceType_Out_Objc_Selector_Ref;
+ info->selector_name = name;
+ } else if (pointer_value != 0 && msgref == true) {
+ info->class_name = nullptr;
+ *ReferenceType = LLVMDisassembler_ReferenceType_Out_Objc_Message_Ref;
+ info->selector_name = name;
+ } else
+ *ReferenceType = LLVMDisassembler_ReferenceType_Out_LitPool_CstrAddr;
return name;
}
- // TODO: look for an indirect symbol with this ReferenceValue which is in
- // a literal pool.
+ // Lastly look for an indirect symbol with this ReferenceValue which is in
+ // a literal pool. If found return that symbol name.
+ name = GuessIndirectSymbol(ReferenceValue, info);
+ if (name) {
+ *ReferenceType = LLVMDisassembler_ReferenceType_Out_LitPool_SymAddr;
+ return name;
+ }
return nullptr;
}
// Out type and the ReferenceName will also be set which is added as a comment
// to the disassembled instruction.
//
+#if HAVE_CXXABI_H
// If the symbol name is a C++ mangled name then the demangled name is
// returned through ReferenceName and ReferenceType is set to
// LLVMDisassembler_ReferenceType_DeMangled_Name .
+#endif
//
// When this is called to get a symbol name for a branch target then the
// ReferenceType will be LLVMDisassembler_ReferenceType_In_Branch and then
// ReferenceType will be LLVMDisassembler_ReferenceType_In_PCrel_Load then the
// SymbolValue is checked to be an address of literal pointer, symbol pointer,
// or an Objective-C meta data reference. If so the output ReferenceType is
-// set to correspond to that as well as ReferenceName.
+// set to correspond to that as well as setting the ReferenceName.
const char *SymbolizerSymbolLookUp(void *DisInfo, uint64_t ReferenceValue,
uint64_t *ReferenceType,
uint64_t ReferencePC,
return nullptr;
}
- const char *SymbolName = nullptr;
- StringRef name = info->AddrMap->lookup(ReferenceValue);
- if (!name.empty())
- SymbolName = name.data();
+ const char *SymbolName = GuessSymbolName(ReferenceValue, info);
if (*ReferenceType == LLVMDisassembler_ReferenceType_In_Branch) {
*ReferenceName = GuessIndirectSymbol(ReferenceValue, info);
+ if (*ReferenceName != nullptr) {
+ method_reference(info, ReferenceType, ReferenceName);
+ if (*ReferenceType != LLVMDisassembler_ReferenceType_Out_Objc_Message)
+ *ReferenceType = LLVMDisassembler_ReferenceType_Out_SymbolStub;
+ } else
+#if HAVE_CXXABI_H
+ if (SymbolName != nullptr && strncmp(SymbolName, "__Z", 3) == 0) {
+ if (info->demangled_name != nullptr)
+ free(info->demangled_name);
+ int status;
+ info->demangled_name =
+ abi::__cxa_demangle(SymbolName + 1, nullptr, nullptr, &status);
+ if (info->demangled_name != nullptr) {
+ *ReferenceName = info->demangled_name;
+ *ReferenceType = LLVMDisassembler_ReferenceType_DeMangled_Name;
+ } else
+ *ReferenceType = LLVMDisassembler_ReferenceType_InOut_None;
+ } else
+#endif
+ *ReferenceType = LLVMDisassembler_ReferenceType_InOut_None;
+ } else if (*ReferenceType == LLVMDisassembler_ReferenceType_In_PCrel_Load) {
+ *ReferenceName =
+ GuessLiteralPointer(ReferenceValue, ReferencePC, ReferenceType, info);
if (*ReferenceName)
- *ReferenceType = LLVMDisassembler_ReferenceType_Out_SymbolStub;
+ method_reference(info, ReferenceType, ReferenceName);
else
*ReferenceType = LLVMDisassembler_ReferenceType_InOut_None;
}
- else if (*ReferenceType == LLVMDisassembler_ReferenceType_In_PCrel_Load) {
- *ReferenceName = GuessLiteralPointer(ReferenceValue, ReferencePC,
- ReferenceType, info);
- if (*ReferenceName == nullptr)
- *ReferenceType = LLVMDisassembler_ReferenceType_InOut_None;
- // TODO: other types of references to be added.
- } else {
+#if HAVE_CXXABI_H
+ else if (SymbolName != nullptr && strncmp(SymbolName, "__Z", 3) == 0) {
+ if (info->demangled_name != nullptr)
+ free(info->demangled_name);
+ int status;
+ info->demangled_name =
+ abi::__cxa_demangle(SymbolName + 1, nullptr, nullptr, &status);
+ if (info->demangled_name != nullptr) {
+ *ReferenceName = info->demangled_name;
+ *ReferenceType = LLVMDisassembler_ReferenceType_DeMangled_Name;
+ }
+ }
+#endif
+ else {
*ReferenceName = nullptr;
*ReferenceType = LLVMDisassembler_ReferenceType_InOut_None;
}
return SymbolName;
}
-//
-// This is the memory object used by DisAsm->getInstruction() which has its
-// BasePC. This then allows the 'address' parameter to getInstruction() to
-// be the actual PC of the instruction. Then when a branch dispacement is
-// added to the PC of an instruction, the 'ReferenceValue' passed to the
-// SymbolizerSymbolLookUp() routine is the correct target addresses. As in
-// the case of a fully linked Mach-O file where a section being disassembled
-// generally not linked at address zero.
-//
-class DisasmMemoryObject : public MemoryObject {
- const uint8_t *Bytes;
- uint64_t Size;
- uint64_t BasePC;
-public:
- DisasmMemoryObject(const uint8_t *bytes, uint64_t size, uint64_t basePC) :
- Bytes(bytes), Size(size), BasePC(basePC) {}
-
- uint64_t getBase() const override { return BasePC; }
- uint64_t getExtent() const override { return Size; }
-
- int readByte(uint64_t Addr, uint8_t *Byte) const override {
- if (Addr - BasePC >= Size)
- return -1;
- *Byte = Bytes[Addr - BasePC];
- return 0;
- }
-};
-
/// \brief Emits the comments that are stored in the CommentStream.
/// Each comment in the CommentStream must end with a newline.
static void emitComments(raw_svector_ostream &CommentStream,
std::unique_ptr<const MCRegisterInfo> ThumbMRI;
std::unique_ptr<const MCAsmInfo> ThumbAsmInfo;
std::unique_ptr<const MCSubtargetInfo> ThumbSTI;
- std::unique_ptr<const MCDisassembler> ThumbDisAsm;
+ std::unique_ptr<MCDisassembler> ThumbDisAsm;
std::unique_ptr<MCInstPrinter> ThumbIP;
std::unique_ptr<MCContext> ThumbCtx;
+ std::unique_ptr<MCSymbolizer> ThumbSymbolizer;
+ struct DisassembleInfo ThumbSymbolizerInfo;
+ std::unique_ptr<MCRelocationInfo> ThumbRelInfo;
if (ThumbTarget) {
ThumbMRI.reset(ThumbTarget->createMCRegInfo(ThumbTripleName));
ThumbAsmInfo.reset(
ThumbTarget->createMCSubtargetInfo(ThumbTripleName, MCPU, FeaturesStr));
ThumbCtx.reset(new MCContext(ThumbAsmInfo.get(), ThumbMRI.get(), nullptr));
ThumbDisAsm.reset(ThumbTarget->createMCDisassembler(*ThumbSTI, *ThumbCtx));
- // TODO: add MCSymbolizer here for the ThumbTarget like above for TheTarget.
+ MCContext *PtrThumbCtx = ThumbCtx.get();
+ ThumbRelInfo.reset(
+ ThumbTarget->createMCRelocationInfo(ThumbTripleName, *PtrThumbCtx));
+ if (ThumbRelInfo) {
+ ThumbSymbolizer.reset(ThumbTarget->createMCSymbolizer(
+ ThumbTripleName, SymbolizerGetOpInfo, SymbolizerSymbolLookUp,
+ &ThumbSymbolizerInfo, PtrThumbCtx, ThumbRelInfo.release()));
+ ThumbDisAsm->setSymbolizer(std::move(ThumbSymbolizer));
+ }
int ThumbAsmPrinterVariant = ThumbAsmInfo->getAssemblerDialect();
ThumbIP.reset(ThumbTarget->createMCInstPrinter(
ThumbAsmPrinterVariant, *ThumbAsmInfo, *ThumbInstrInfo, *ThumbMRI,
continue;
StringRef SectName;
- if (Sections[SectIdx].getName(SectName) ||
- SectName != "__text")
+ if (Sections[SectIdx].getName(SectName) || SectName != "__text")
continue; // Skip non-text sections
DataRefImpl DR = Sections[SectIdx].getRawDataRefImpl();
if (SegmentName != "__TEXT")
continue;
- StringRef Bytes;
- Sections[SectIdx].getContents(Bytes);
+ StringRef BytesStr;
+ Sections[SectIdx].getContents(BytesStr);
+ ArrayRef<uint8_t> Bytes(reinterpret_cast<const uint8_t *>(BytesStr.data()),
+ BytesStr.size());
uint64_t SectAddress = Sections[SectIdx].getAddress();
- DisasmMemoryObject MemoryObject((const uint8_t *)Bytes.data(), Bytes.size(),
- SectAddress);
+
bool symbolTableWorked = false;
// Parse relocations.
SymbolizerInfo.O = MachOOF;
SymbolizerInfo.S = Sections[SectIdx];
SymbolizerInfo.AddrMap = &AddrMap;
+ SymbolizerInfo.Sections = &Sections;
+ SymbolizerInfo.class_name = nullptr;
+ SymbolizerInfo.selector_name = nullptr;
+ SymbolizerInfo.method = nullptr;
+ SymbolizerInfo.demangled_name = nullptr;
+ SymbolizerInfo.bindtable = nullptr;
+ // Same for the ThumbSymbolizer
+ ThumbSymbolizerInfo.verbose = true;
+ ThumbSymbolizerInfo.O = MachOOF;
+ ThumbSymbolizerInfo.S = Sections[SectIdx];
+ ThumbSymbolizerInfo.AddrMap = &AddrMap;
+ ThumbSymbolizerInfo.Sections = &Sections;
+ ThumbSymbolizerInfo.class_name = nullptr;
+ ThumbSymbolizerInfo.selector_name = nullptr;
+ ThumbSymbolizerInfo.method = nullptr;
+ ThumbSymbolizerInfo.demangled_name = nullptr;
+ ThumbSymbolizerInfo.bindtable = nullptr;
// Disassemble symbol by symbol.
for (unsigned SymIdx = 0; SymIdx != Symbols.size(); SymIdx++) {
// the end of the section.
bool containsNextSym = false;
uint64_t NextSym = 0;
- uint64_t NextSymIdx = SymIdx+1;
+ uint64_t NextSymIdx = SymIdx + 1;
while (Symbols.size() > NextSymIdx) {
SymbolRef::Type NextSymType;
Symbols[NextSymIdx].getType(NextSymType);
}
uint64_t SectSize = Sections[SectIdx].getSize();
- uint64_t End = containsNextSym ? NextSym : SectSize;
+ uint64_t End = containsNextSym ? NextSym : SectSize;
uint64_t Size;
symbolTableWorked = true;
if (FullLeadingAddr) {
if (MachOOF->is64Bit())
outs() << format("%016" PRIx64, PC);
- else
+ else
outs() << format("%08" PRIx64, PC);
} else {
outs() << format("%8" PRIx64 ":", PC);
// instruction to be disassembled.
DiceTable Dice;
Dice.push_back(std::make_pair(PC, DiceRef()));
- dice_table_iterator DTI = std::search(Dices.begin(), Dices.end(),
- Dice.begin(), Dice.end(),
- compareDiceTableEntries);
- if (DTI != Dices.end()){
+ dice_table_iterator DTI =
+ std::search(Dices.begin(), Dices.end(), Dice.begin(), Dice.end(),
+ compareDiceTableEntries);
+ if (DTI != Dices.end()) {
uint16_t Length;
DTI->second.getLength(Length);
- DumpBytes(StringRef(Bytes.data() + Index, Length));
uint16_t Kind;
DTI->second.getKind(Kind);
- DumpDataInCode(Bytes.data() + Index, Length, Kind);
+ Size = DumpDataInCode(reinterpret_cast<const char *>(Bytes.data()) +
+ Index,
+ Length, Kind);
+ if ((Kind == MachO::DICE_KIND_JUMP_TABLE8) &&
+ (PC == (DTI->first + Length - 1)) && (Length & 1))
+ Size++;
continue;
}
bool gotInst;
if (isThumb)
- gotInst = ThumbDisAsm->getInstruction(Inst, Size, MemoryObject, PC,
- DebugOut, Annotations);
+ gotInst = ThumbDisAsm->getInstruction(Inst, Size, Bytes.slice(Index),
+ PC, DebugOut, Annotations);
else
- gotInst = DisAsm->getInstruction(Inst, Size, MemoryObject, PC,
+ gotInst = DisAsm->getInstruction(Inst, Size, Bytes.slice(Index), PC,
DebugOut, Annotations);
if (gotInst) {
if (!NoShowRawInsn) {
- DumpBytes(StringRef(Bytes.data() + Index, Size));
+ DumpBytes(StringRef(
+ reinterpret_cast<const char *>(Bytes.data()) + Index, Size));
}
formatted_raw_ostream FormattedOS(outs());
Annotations.flush();
// Print debug info.
if (diContext) {
- DILineInfo dli =
- diContext->getLineInfoForAddress(PC);
+ DILineInfo dli = diContext->getLineInfoForAddress(PC);
// Print valid line info if it changed.
if (dli != lastLine && dli.Line != 0)
outs() << "\t## " << dli.FileName << ':' << dli.Line << ':'
}
outs() << "\n";
} else {
- errs() << "llvm-objdump: warning: invalid instruction encoding\n";
- if (Size == 0)
- Size = 1; // skip illegible bytes
+ unsigned int Arch = MachOOF->getArch();
+ if (Arch == Triple::x86_64 || Arch == Triple::x86) {
+ outs() << format("\t.byte 0x%02x #bad opcode\n",
+ *(Bytes.data() + Index) & 0xff);
+ Size = 1; // skip exactly one illegible byte and move on.
+ } else {
+ errs() << "llvm-objdump: warning: invalid instruction encoding\n";
+ if (Size == 0)
+ Size = 1; // skip illegible bytes
+ }
}
}
}
MCInst Inst;
uint64_t PC = SectAddress + Index;
- if (DisAsm->getInstruction(Inst, InstSize, MemoryObject, PC,
+ if (DisAsm->getInstruction(Inst, InstSize, Bytes.slice(Index), PC,
DebugOut, nulls())) {
if (FullLeadingAddr) {
if (MachOOF->is64Bit())
outs() << format("%016" PRIx64, PC);
- else
+ else
outs() << format("%08" PRIx64, PC);
} else {
outs() << format("%8" PRIx64 ":", PC);
}
if (!NoShowRawInsn) {
outs() << "\t";
- DumpBytes(StringRef(Bytes.data() + Index, InstSize));
+ DumpBytes(
+ StringRef(reinterpret_cast<const char *>(Bytes.data()) + Index,
+ InstSize));
}
IP->printInst(&Inst, outs(), "");
outs() << "\n";
} else {
- errs() << "llvm-objdump: warning: invalid instruction encoding\n";
- if (InstSize == 0)
- InstSize = 1; // skip illegible bytes
+ unsigned int Arch = MachOOF->getArch();
+ if (Arch == Triple::x86_64 || Arch == Triple::x86) {
+ outs() << format("\t.byte 0x%02x #bad opcode\n",
+ *(Bytes.data() + Index) & 0xff);
+ InstSize = 1; // skip exactly one illegible byte and move on.
+ } else {
+ errs() << "llvm-objdump: warning: invalid instruction encoding\n";
+ if (InstSize == 0)
+ InstSize = 1; // skip illegible bytes
+ }
}
}
}
+ if (SymbolizerInfo.method != nullptr)
+ free(SymbolizerInfo.method);
+ if (SymbolizerInfo.demangled_name != nullptr)
+ free(SymbolizerInfo.demangled_name);
+ if (SymbolizerInfo.bindtable != nullptr)
+ delete SymbolizerInfo.bindtable;
+ if (ThumbSymbolizerInfo.method != nullptr)
+ free(ThumbSymbolizerInfo.method);
+ if (ThumbSymbolizerInfo.demangled_name != nullptr)
+ free(ThumbSymbolizerInfo.demangled_name);
+ if (ThumbSymbolizerInfo.bindtable != nullptr)
+ delete ThumbSymbolizerInfo.bindtable;
}
}
-
//===----------------------------------------------------------------------===//
// __compact_unwind section dumping
//===----------------------------------------------------------------------===//
namespace {
template <typename T> static uint64_t readNext(const char *&Buf) {
- using llvm::support::little;
- using llvm::support::unaligned;
+ using llvm::support::little;
+ using llvm::support::unaligned;
- uint64_t Val = support::endian::read<T, little, unaligned>(Buf);
- Buf += sizeof(T);
- return Val;
- }
+ uint64_t Val = support::endian::read<T, little, unaligned>(Buf);
+ Buf += sizeof(T);
+ return Val;
+}
struct CompactUnwindEntry {
uint32_t OffsetInSection;
RelocationRef LSDAReloc;
CompactUnwindEntry(StringRef Contents, unsigned Offset, bool Is64)
- : OffsetInSection(Offset) {
+ : OffsetInSection(Offset) {
if (Is64)
read<uint64_t>(Contents.data() + Offset);
else
}
private:
- template<typename UIntPtr>
- void read(const char *Buf) {
+ template <typename UIntPtr> void read(const char *Buf) {
FunctionAddr = readNext<UIntPtr>(Buf);
Length = readNext<uint32_t>(Buf);
CompactEncoding = readNext<uint32_t>(Buf);
/// referenced section.
static void findUnwindRelocNameAddend(const MachOObjectFile *Obj,
std::map<uint64_t, SymbolRef> &Symbols,
- const RelocationRef &Reloc,
- uint64_t Addr,
+ const RelocationRef &Reloc, uint64_t Addr,
StringRef &Name, uint64_t &Addend) {
if (Reloc.getSymbol() != Obj->symbol_end()) {
Reloc.getSymbol()->getName(Name);
static void printUnwindRelocDest(const MachOObjectFile *Obj,
std::map<uint64_t, SymbolRef> &Symbols,
- const RelocationRef &Reloc,
- uint64_t Addr) {
+ const RelocationRef &Reloc, uint64_t Addr) {
StringRef Name;
uint64_t Addend;
<< format("0x%" PRIx32, Entry.OffsetInSection) << ":\n";
// 1. Start of the region this entry applies to.
- outs() << " start: "
- << format("0x%" PRIx64, Entry.FunctionAddr) << ' ';
- printUnwindRelocDest(Obj, Symbols, Entry.FunctionReloc,
- Entry.FunctionAddr);
+ outs() << " start: " << format("0x%" PRIx64,
+ Entry.FunctionAddr) << ' ';
+ printUnwindRelocDest(Obj, Symbols, Entry.FunctionReloc, Entry.FunctionAddr);
outs() << '\n';
// 2. Length of the region this entry applies to.
- outs() << " length: "
- << format("0x%" PRIx32, Entry.Length) << '\n';
+ outs() << " length: " << format("0x%" PRIx32, Entry.Length)
+ << '\n';
// 3. The 32-bit compact encoding.
outs() << " compact encoding: "
<< format("0x%08" PRIx32, Entry.CompactEncoding) << '\n';
// 5. This entry's language-specific data area.
if (Entry.LSDAReloc.getObjectFile()) {
- outs() << " LSDA: "
- << format("0x%" PRIx64, Entry.LSDAAddr) << ' ';
+ outs() << " LSDA: " << format("0x%" PRIx64,
+ Entry.LSDAAddr) << ' ';
printUnwindRelocDest(Obj, Symbols, Entry.LSDAReloc, Entry.LSDAAddr);
outs() << '\n';
}
uint32_t Encoding = readNext<uint32_t>(Pos);
outs() << " [" << i << "]: "
- << "function offset="
- << format("0x%08" PRIx32, FunctionOffset) << ", "
- << "encoding="
- << format("0x%08" PRIx32, Encoding)
- << '\n';
+ << "function offset=" << format("0x%08" PRIx32, FunctionOffset)
+ << ", "
+ << "encoding=" << format("0x%08" PRIx32, Encoding) << '\n';
}
}
Encoding = PageEncodings[EncodingIdx - CommonEncodings.size()];
outs() << " [" << i << "]: "
- << "function offset="
- << format("0x%08" PRIx32, FunctionOffset) << ", "
- << "encoding[" << EncodingIdx << "]="
- << format("0x%08" PRIx32, Encoding)
- << '\n';
+ << "function offset=" << format("0x%08" PRIx32, FunctionOffset)
+ << ", "
+ << "encoding[" << EncodingIdx
+ << "]=" << format("0x%08" PRIx32, Encoding) << '\n';
}
}
-static void
-printMachOUnwindInfoSection(const MachOObjectFile *Obj,
- std::map<uint64_t, SymbolRef> &Symbols,
- const SectionRef &UnwindInfo) {
+static void printMachOUnwindInfoSection(const MachOObjectFile *Obj,
+ std::map<uint64_t, SymbolRef> &Symbols,
+ const SectionRef &UnwindInfo) {
assert(Obj->isLittleEndian() &&
"There should not be a big-endian .o with __unwind_info");
<< '\n';
}
-
//===----------------------------------
// Personality functions used in this executable
//===----------------------------------
IndexEntries.push_back(Entry);
outs() << " [" << i << "]: "
- << "function offset="
- << format("0x%08" PRIx32, Entry.FunctionOffset) << ", "
+ << "function offset=" << format("0x%08" PRIx32, Entry.FunctionOffset)
+ << ", "
<< "2nd level page offset="
<< format("0x%08" PRIx32, Entry.SecondLevelPageStart) << ", "
- << "LSDA offset="
- << format("0x%08" PRIx32, Entry.LSDAStart) << '\n';
+ << "LSDA offset=" << format("0x%08" PRIx32, Entry.LSDAStart) << '\n';
}
-
//===----------------------------------
// Next come the LSDA tables
//===----------------------------------
uint32_t FunctionOffset = readNext<uint32_t>(Pos);
uint32_t LSDAOffset = readNext<uint32_t>(Pos);
outs() << " [" << i << "]: "
- << "function offset="
- << format("0x%08" PRIx32, FunctionOffset) << ", "
- << "LSDA offset="
- << format("0x%08" PRIx32, LSDAOffset) << '\n';
+ << "function offset=" << format("0x%08" PRIx32, FunctionOffset)
+ << ", "
+ << "LSDA offset=" << format("0x%08" PRIx32, LSDAOffset) << '\n';
}
//===----------------------------------
CommonEncodings);
else
llvm_unreachable("Do not know how to print this kind of 2nd level page");
-
}
}
printMachOUnwindInfoSection(Obj, Symbols, Section);
else if (SectName == "__eh_frame")
outs() << "llvm-objdump: warning: unhandled __eh_frame section\n";
-
}
}
if (dyld.name >= dyld.cmdsize)
outs() << " name ?(bad offset " << dyld.name << ")\n";
else {
- const char *P = (const char *)(Ptr)+dyld.name;
+ const char *P = (const char *)(Ptr) + dyld.name;
outs() << " name " << P << " (offset " << dyld.name << ")\n";
}
}
else
outs() << "\n";
if (dl.dylib.name < dl.cmdsize) {
- const char *P = (const char *)(Ptr)+dl.dylib.name;
+ const char *P = (const char *)(Ptr) + dl.dylib.name;
outs() << " name " << P << " (offset " << dl.dylib.name << ")\n";
} else {
outs() << " name ?(bad offset " << dl.dylib.name << ")\n";
} else if (Command.C.cmd == MachO::LC_MAIN) {
MachO::entry_point_command Ep = Obj->getEntryPointCommand(Command);
PrintEntryPointCommand(Ep);
- } else if (Command.C.cmd == MachO::LC_LOAD_DYLIB) {
+ } else if (Command.C.cmd == MachO::LC_LOAD_DYLIB ||
+ Command.C.cmd == MachO::LC_ID_DYLIB ||
+ Command.C.cmd == MachO::LC_LOAD_WEAK_DYLIB ||
+ Command.C.cmd == MachO::LC_REEXPORT_DYLIB ||
+ Command.C.cmd == MachO::LC_LAZY_LOAD_DYLIB ||
+ Command.C.cmd == MachO::LC_LOAD_UPWARD_DYLIB) {
MachO::dylib_command Dl = Obj->getDylibIDLoadCommand(Command);
PrintDylibCommand(Dl, Command.Ptr);
} else if (Command.C.cmd == MachO::LC_CODE_SIGNATURE ||
if (ReExport)
outs() << "[re-export] ";
else
- outs()
- << format("0x%08llX ", Entry.address()); // FIXME:add in base address
+ outs() << format("0x%08llX ",
+ Entry.address()); // FIXME:add in base address
outs() << Entry.name();
if (WeakDef || ThreadLocal || Resolver || Abs) {
bool NeedsComma = false;
}
}
-
//===----------------------------------------------------------------------===//
// rebase table dumping
//===----------------------------------------------------------------------===//
uint64_t Address = sectionTable.address(SegIndex, OffsetInSeg);
// Table lines look like: __DATA __nl_symbol_ptr 0x0000F00C pointer
- outs() << format("%-8s %-18s 0x%08" PRIX64 " %s\n",
- SegmentName.str().c_str(),
- SectionName.str().c_str(), Address,
- Entry.typeName().str().c_str());
+ outs() << format("%-8s %-18s 0x%08" PRIX64 " %s\n",
+ SegmentName.str().c_str(), SectionName.str().c_str(),
+ Address, Entry.typeName().str().c_str());
}
}
return "flat-namespace";
default:
if (Ordinal > 0) {
- std::error_code EC = Obj->getLibraryShortNameByIndex(Ordinal-1,
- DylibName);
+ std::error_code EC =
+ Obj->getLibraryShortNameByIndex(Ordinal - 1, DylibName);
if (EC)
return "<<bad library ordinal>>";
return DylibName;
StringRef Attr;
if (Entry.flags() & MachO::BIND_SYMBOL_FLAGS_WEAK_IMPORT)
Attr = " (weak_import)";
- outs() << left_justify(SegmentName, 8) << " "
+ outs() << left_justify(SegmentName, 8) << " "
<< left_justify(SectionName, 18) << " "
<< format_hex(Address, 10, true) << " "
<< left_justify(Entry.typeName(), 8) << " "
- << format_decimal(Entry.addend(), 8) << " "
+ << format_decimal(Entry.addend(), 8) << " "
<< left_justify(ordinalName(Obj, Entry.ordinal()), 16) << " "
- << Entry.symbolName()
- << Attr << "\n";
+ << Entry.symbolName() << Attr << "\n";
}
}
// Table lines look like:
// __DATA __got 0x00012010 libSystem ___stack_chk_guard
- outs() << left_justify(SegmentName, 8) << " "
+ outs() << left_justify(SegmentName, 8) << " "
<< left_justify(SectionName, 18) << " "
<< format_hex(Address, 10, true) << " "
<< left_justify(ordinalName(Obj, Entry.ordinal()), 16) << " "
}
}
-
//===----------------------------------------------------------------------===//
// weak bind table dumping
//===----------------------------------------------------------------------===//
// Table lines look like:
// __DATA __data 0x00001000 pointer 0 _foo
- outs() << left_justify(SegmentName, 8) << " "
+ outs() << left_justify(SegmentName, 8) << " "
<< left_justify(SectionName, 18) << " "
<< format_hex(Address, 10, true) << " "
<< left_justify(Entry.typeName(), 8) << " "
- << format_decimal(Entry.addend(), 8) << " "
- << Entry.symbolName() << "\n";
+ << format_decimal(Entry.addend(), 8) << " " << Entry.symbolName()
+ << "\n";
}
}
-
+// get_dyld_bind_info_symbolname() is used for disassembly and passed an
+// address, ReferenceValue, in the Mach-O file and looks in the dyld bind
+// information for that address. If the address is found its binding symbol
+// name is returned. If not nullptr is returned.
+static const char *get_dyld_bind_info_symbolname(uint64_t ReferenceValue,
+ struct DisassembleInfo *info) {
+ if (info->bindtable == nullptr) {
+ info->bindtable = new (BindTable);
+ SegInfo sectionTable(info->O);
+ for (const llvm::object::MachOBindEntry &Entry : info->O->bindTable()) {
+ uint32_t SegIndex = Entry.segmentIndex();
+ uint64_t OffsetInSeg = Entry.segmentOffset();
+ uint64_t Address = sectionTable.address(SegIndex, OffsetInSeg);
+ const char *SymbolName = nullptr;
+ StringRef name = Entry.symbolName();
+ if (!name.empty())
+ SymbolName = name.data();
+ info->bindtable->push_back(std::make_pair(Address, SymbolName));
+ }
+ }
+ for (bind_table_iterator BI = info->bindtable->begin(),
+ BE = info->bindtable->end();
+ BI != BE; ++BI) {
+ uint64_t Address = BI->first;
+ if (ReferenceValue == Address) {
+ const char *SymbolName = BI->second;
+ return SymbolName;
+ }
+ }
+ return nullptr;
+}
projects / oota-llvm.git / blobdiff