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llvm-mirror/tools/llvm-readobj/ARMEHABIPrinter.h
Zachary Turner 6491f0eb80 Move llvm-readobj/StreamWriter to Support. 
We wish to re-use this from llvm-pdbdump, and it provides a nice
way to print structured data in scoped format that could prove
useful for many other dumping tools as well.  Moving to support
and changing name to ScopedPrinter to better reflect its purpose.

llvm-svn: 268342
2016-05-03 00:28:04 +00:00

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//===--- ARMEHABIPrinter.h - ARM EHABI Unwind Information Printer ----------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_TOOLS_LLVM_READOBJ_ARMEHABIPRINTER_H
#define LLVM_TOOLS_LLVM_READOBJ_ARMEHABIPRINTER_H
#include "Error.h"
#include "llvm-readobj.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/Object/ELF.h"
#include "llvm/Object/ELFTypes.h"
#include "llvm/Support/ARMEHABI.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/Endian.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/ScopedPrinter.h"
#include "llvm/Support/type_traits.h"
namespace llvm {
namespace ARM {
namespace EHABI {
class OpcodeDecoder {
ScopedPrinter &SW;
raw_ostream &OS;
struct RingEntry {
uint8_t Mask;
uint8_t Value;
void (OpcodeDecoder::*Routine)(const uint8_t *Opcodes, unsigned &OI);
};
static const RingEntry Ring[];
void Decode_00xxxxxx(const uint8_t *Opcodes, unsigned &OI);
void Decode_01xxxxxx(const uint8_t *Opcodes, unsigned &OI);
void Decode_1000iiii_iiiiiiii(const uint8_t *Opcodes, unsigned &OI);
void Decode_10011101(const uint8_t *Opcodes, unsigned &OI);
void Decode_10011111(const uint8_t *Opcodes, unsigned &OI);
void Decode_1001nnnn(const uint8_t *Opcodes, unsigned &OI);
void Decode_10100nnn(const uint8_t *Opcodes, unsigned &OI);
void Decode_10101nnn(const uint8_t *Opcodes, unsigned &OI);
void Decode_10110000(const uint8_t *Opcodes, unsigned &OI);
void Decode_10110001_0000iiii(const uint8_t *Opcodes, unsigned &OI);
void Decode_10110010_uleb128(const uint8_t *Opcodes, unsigned &OI);
void Decode_10110011_sssscccc(const uint8_t *Opcodes, unsigned &OI);
void Decode_101101nn(const uint8_t *Opcodes, unsigned &OI);
void Decode_10111nnn(const uint8_t *Opcodes, unsigned &OI);
void Decode_11000110_sssscccc(const uint8_t *Opcodes, unsigned &OI);
void Decode_11000111_0000iiii(const uint8_t *Opcodes, unsigned &OI);
void Decode_11001000_sssscccc(const uint8_t *Opcodes, unsigned &OI);
void Decode_11001001_sssscccc(const uint8_t *Opcodes, unsigned &OI);
void Decode_11001yyy(const uint8_t *Opcodes, unsigned &OI);
void Decode_11000nnn(const uint8_t *Opcodes, unsigned &OI);
void Decode_11010nnn(const uint8_t *Opcodes, unsigned &OI);
void Decode_11xxxyyy(const uint8_t *Opcodes, unsigned &OI);
void PrintGPR(uint16_t GPRMask);
void PrintRegisters(uint32_t Mask, StringRef Prefix);
public:
OpcodeDecoder(ScopedPrinter &SW) : SW(SW), OS(SW.getOStream()) {}
void Decode(const uint8_t *Opcodes, off_t Offset, size_t Length);
};
const OpcodeDecoder::RingEntry OpcodeDecoder::Ring[] = {
{ 0xc0, 0x00, &OpcodeDecoder::Decode_00xxxxxx },
{ 0xc0, 0x40, &OpcodeDecoder::Decode_01xxxxxx },
{ 0xf0, 0x80, &OpcodeDecoder::Decode_1000iiii_iiiiiiii },
{ 0xff, 0x9d, &OpcodeDecoder::Decode_10011101 },
{ 0xff, 0x9f, &OpcodeDecoder::Decode_10011111 },
{ 0xf0, 0x90, &OpcodeDecoder::Decode_1001nnnn },
{ 0xf8, 0xa0, &OpcodeDecoder::Decode_10100nnn },
{ 0xf8, 0xa8, &OpcodeDecoder::Decode_10101nnn },
{ 0xff, 0xb0, &OpcodeDecoder::Decode_10110000 },
{ 0xff, 0xb1, &OpcodeDecoder::Decode_10110001_0000iiii },
{ 0xff, 0xb2, &OpcodeDecoder::Decode_10110010_uleb128 },
{ 0xff, 0xb3, &OpcodeDecoder::Decode_10110011_sssscccc },
{ 0xfc, 0xb4, &OpcodeDecoder::Decode_101101nn },
{ 0xf8, 0xb8, &OpcodeDecoder::Decode_10111nnn },
{ 0xff, 0xc6, &OpcodeDecoder::Decode_11000110_sssscccc },
{ 0xff, 0xc7, &OpcodeDecoder::Decode_11000111_0000iiii },
{ 0xff, 0xc8, &OpcodeDecoder::Decode_11001000_sssscccc },
{ 0xff, 0xc9, &OpcodeDecoder::Decode_11001001_sssscccc },
{ 0xc8, 0xc8, &OpcodeDecoder::Decode_11001yyy },
{ 0xf8, 0xc0, &OpcodeDecoder::Decode_11000nnn },
{ 0xf8, 0xd0, &OpcodeDecoder::Decode_11010nnn },
{ 0xc0, 0xc0, &OpcodeDecoder::Decode_11xxxyyy },
};
void OpcodeDecoder::Decode_00xxxxxx(const uint8_t *Opcodes, unsigned &OI) {
uint8_t Opcode = Opcodes[OI++ ^ 3];
SW.startLine() << format("0x%02X ; vsp = vsp + %u\n", Opcode,
((Opcode & 0x3f) << 2) + 4);
}
void OpcodeDecoder::Decode_01xxxxxx(const uint8_t *Opcodes, unsigned &OI) {
uint8_t Opcode = Opcodes[OI++ ^ 3];
SW.startLine() << format("0x%02X ; vsp = vsp - %u\n", Opcode,
((Opcode & 0x3f) << 2) + 4);
}
void OpcodeDecoder::Decode_1000iiii_iiiiiiii(const uint8_t *Opcodes,
unsigned &OI) {
uint8_t Opcode0 = Opcodes[OI++ ^ 3];
uint8_t Opcode1 = Opcodes[OI++ ^ 3];
uint16_t GPRMask = (Opcode1 << 4) | ((Opcode0 & 0x0f) << 12);
SW.startLine()
<< format("0x%02X 0x%02X ; %s",
Opcode0, Opcode1, GPRMask ? "pop " : "refuse to unwind");
if (GPRMask)
PrintGPR(GPRMask);
OS << '\n';
}
void OpcodeDecoder::Decode_10011101(const uint8_t *Opcodes, unsigned &OI) {
uint8_t Opcode = Opcodes[OI++ ^ 3];
SW.startLine() << format("0x%02X ; reserved (ARM MOVrr)\n", Opcode);
}
void OpcodeDecoder::Decode_10011111(const uint8_t *Opcodes, unsigned &OI) {
uint8_t Opcode = Opcodes[OI++ ^ 3];
SW.startLine() << format("0x%02X ; reserved (WiMMX MOVrr)\n", Opcode);
}
void OpcodeDecoder::Decode_1001nnnn(const uint8_t *Opcodes, unsigned &OI) {
uint8_t Opcode = Opcodes[OI++ ^ 3];
SW.startLine() << format("0x%02X ; vsp = r%u\n", Opcode, (Opcode & 0x0f));
}
void OpcodeDecoder::Decode_10100nnn(const uint8_t *Opcodes, unsigned &OI) {
uint8_t Opcode = Opcodes[OI++ ^ 3];
SW.startLine() << format("0x%02X ; pop ", Opcode);
PrintGPR((((1 << ((Opcode & 0x7) + 1)) - 1) << 4));
OS << '\n';
}
void OpcodeDecoder::Decode_10101nnn(const uint8_t *Opcodes, unsigned &OI) {
uint8_t Opcode = Opcodes[OI++ ^ 3];
SW.startLine() << format("0x%02X ; pop ", Opcode);
PrintGPR((((1 << ((Opcode & 0x7) + 1)) - 1) << 4) | (1 << 14));
OS << '\n';
}
void OpcodeDecoder::Decode_10110000(const uint8_t *Opcodes, unsigned &OI) {
uint8_t Opcode = Opcodes[OI++ ^ 3];
SW.startLine() << format("0x%02X ; finish\n", Opcode);
}
void OpcodeDecoder::Decode_10110001_0000iiii(const uint8_t *Opcodes,
unsigned &OI) {
uint8_t Opcode0 = Opcodes[OI++ ^ 3];
uint8_t Opcode1 = Opcodes[OI++ ^ 3];
SW.startLine()
<< format("0x%02X 0x%02X ; %s", Opcode0, Opcode1,
((Opcode1 & 0xf0) || Opcode1 == 0x00) ? "spare" : "pop ");
if (((Opcode1 & 0xf0) == 0x00) && Opcode1)
PrintGPR((Opcode1 & 0x0f));
OS << '\n';
}
void OpcodeDecoder::Decode_10110010_uleb128(const uint8_t *Opcodes,
unsigned &OI) {
uint8_t Opcode = Opcodes[OI++ ^ 3];
SW.startLine() << format("0x%02X ", Opcode);
SmallVector<uint8_t, 4> ULEB;
do { ULEB.push_back(Opcodes[OI ^ 3]); } while (Opcodes[OI++ ^ 3] & 0x80);
for (unsigned BI = 0, BE = ULEB.size(); BI != BE; ++BI)
OS << format("0x%02X ", ULEB[BI]);
uint64_t Value = 0;
for (unsigned BI = 0, BE = ULEB.size(); BI != BE; ++BI)
Value = Value | ((ULEB[BI] & 0x7f) << (7 * BI));
OS << format("; vsp = vsp + %" PRIu64 "\n", 0x204 + (Value << 2));
}
void OpcodeDecoder::Decode_10110011_sssscccc(const uint8_t *Opcodes,
unsigned &OI) {
uint8_t Opcode0 = Opcodes[OI++ ^ 3];
uint8_t Opcode1 = Opcodes[OI++ ^ 3];
SW.startLine() << format("0x%02X 0x%02X ; pop ", Opcode0, Opcode1);
uint8_t Start = ((Opcode1 & 0xf0) >> 4);
uint8_t Count = ((Opcode1 & 0x0f) >> 0);
PrintRegisters((((1 << (Count + 1)) - 1) << Start), "d");
OS << '\n';
}
void OpcodeDecoder::Decode_101101nn(const uint8_t *Opcodes, unsigned &OI) {
uint8_t Opcode = Opcodes[OI++ ^ 3];
SW.startLine() << format("0x%02X ; spare\n", Opcode);
}
void OpcodeDecoder::Decode_10111nnn(const uint8_t *Opcodes, unsigned &OI) {
uint8_t Opcode = Opcodes[OI++ ^ 3];
SW.startLine() << format("0x%02X ; pop ", Opcode);
PrintRegisters((((1 << ((Opcode & 0x07) + 1)) - 1) << 8), "d");
OS << '\n';
}
void OpcodeDecoder::Decode_11000110_sssscccc(const uint8_t *Opcodes,
unsigned &OI) {
uint8_t Opcode0 = Opcodes[OI++ ^ 3];
uint8_t Opcode1 = Opcodes[OI++ ^ 3];
SW.startLine() << format("0x%02X 0x%02X ; pop ", Opcode0, Opcode1);
uint8_t Start = ((Opcode1 & 0xf0) >> 4);
uint8_t Count = ((Opcode1 & 0x0f) >> 0);
PrintRegisters((((1 << (Count + 1)) - 1) << Start), "wR");
OS << '\n';
}
void OpcodeDecoder::Decode_11000111_0000iiii(const uint8_t *Opcodes,
unsigned &OI) {
uint8_t Opcode0 = Opcodes[OI++ ^ 3];
uint8_t Opcode1 = Opcodes[OI++ ^ 3];
SW.startLine()
<< format("0x%02X 0x%02X ; %s", Opcode0, Opcode1,
((Opcode1 & 0xf0) || Opcode1 == 0x00) ? "spare" : "pop ");
if ((Opcode1 & 0xf0) == 0x00 && Opcode1)
PrintRegisters(Opcode1 & 0x0f, "wCGR");
OS << '\n';
}
void OpcodeDecoder::Decode_11001000_sssscccc(const uint8_t *Opcodes,
unsigned &OI) {
uint8_t Opcode0 = Opcodes[OI++ ^ 3];
uint8_t Opcode1 = Opcodes[OI++ ^ 3];
SW.startLine() << format("0x%02X 0x%02X ; pop ", Opcode0, Opcode1);
uint8_t Start = 16 + ((Opcode1 & 0xf0) >> 4);
uint8_t Count = ((Opcode1 & 0x0f) >> 0);
PrintRegisters((((1 << (Count + 1)) - 1) << Start), "d");
OS << '\n';
}
void OpcodeDecoder::Decode_11001001_sssscccc(const uint8_t *Opcodes,
unsigned &OI) {
uint8_t Opcode0 = Opcodes[OI++ ^ 3];
uint8_t Opcode1 = Opcodes[OI++ ^ 3];
SW.startLine() << format("0x%02X 0x%02X ; pop ", Opcode0, Opcode1);
uint8_t Start = ((Opcode1 & 0xf0) >> 4);
uint8_t Count = ((Opcode1 & 0x0f) >> 0);
PrintRegisters((((1 << (Count + 1)) - 1) << Start), "d");
OS << '\n';
}
void OpcodeDecoder::Decode_11001yyy(const uint8_t *Opcodes, unsigned &OI) {
uint8_t Opcode = Opcodes[OI++ ^ 3];
SW.startLine() << format("0x%02X ; spare\n", Opcode);
}
void OpcodeDecoder::Decode_11000nnn(const uint8_t *Opcodes, unsigned &OI) {
uint8_t Opcode = Opcodes[OI++ ^ 3];
SW.startLine() << format("0x%02X ; pop ", Opcode);
PrintRegisters((((1 << ((Opcode & 0x07) + 1)) - 1) << 10), "wR");
OS << '\n';
}
void OpcodeDecoder::Decode_11010nnn(const uint8_t *Opcodes, unsigned &OI) {
uint8_t Opcode = Opcodes[OI++ ^ 3];
SW.startLine() << format("0x%02X ; pop ", Opcode);
PrintRegisters((((1 << ((Opcode & 0x07) + 1)) - 1) << 8), "d");
OS << '\n';
}
void OpcodeDecoder::Decode_11xxxyyy(const uint8_t *Opcodes, unsigned &OI) {
uint8_t Opcode = Opcodes[OI++ ^ 3];
SW.startLine() << format("0x%02X ; spare\n", Opcode);
}
void OpcodeDecoder::PrintGPR(uint16_t GPRMask) {
static const char *GPRRegisterNames[16] = {
"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10",
"fp", "ip", "sp", "lr", "pc"
};
OS << '{';
bool Comma = false;
for (unsigned RI = 0, RE = 17; RI < RE; ++RI) {
if (GPRMask & (1 << RI)) {
if (Comma)
OS << ", ";
OS << GPRRegisterNames[RI];
Comma = true;
}
}
OS << '}';
}
void OpcodeDecoder::PrintRegisters(uint32_t VFPMask, StringRef Prefix) {
OS << '{';
bool Comma = false;
for (unsigned RI = 0, RE = 32; RI < RE; ++RI) {
if (VFPMask & (1 << RI)) {
if (Comma)
OS << ", ";
OS << Prefix << RI;
Comma = true;
}
}
OS << '}';
}
void OpcodeDecoder::Decode(const uint8_t *Opcodes, off_t Offset, size_t Length) {
for (unsigned OCI = Offset; OCI < Length + Offset; ) {
bool Decoded = false;
for (unsigned REI = 0, REE = array_lengthof(Ring);
REI != REE && !Decoded; ++REI) {
if ((Opcodes[OCI ^ 3] & Ring[REI].Mask) == Ring[REI].Value) {
(this->*Ring[REI].Routine)(Opcodes, OCI);
Decoded = true;
break;
}
}
if (!Decoded)
SW.startLine() << format("0x%02X ; reserved\n", Opcodes[OCI++ ^ 3]);
}
}
template <typename ET>
class PrinterContext {
typedef typename object::ELFFile<ET>::Elf_Sym Elf_Sym;
typedef typename object::ELFFile<ET>::Elf_Shdr Elf_Shdr;
typedef typename object::ELFFile<ET>::Elf_Rel Elf_Rel;
typedef typename object::ELFFile<ET>::Elf_Word Elf_Word;
ScopedPrinter &SW;
const object::ELFFile<ET> *ELF;
const Elf_Shdr *Symtab;
ArrayRef<Elf_Word> ShndxTable;
static const size_t IndexTableEntrySize;
static uint64_t PREL31(uint32_t Address, uint32_t Place) {
uint64_t Location = Address & 0x7fffffff;
if (Location & 0x04000000)
Location |= (uint64_t) ~0x7fffffff;
return Location + Place;
}
ErrorOr<StringRef> FunctionAtAddress(unsigned Section, uint64_t Address) const;
const Elf_Shdr *FindExceptionTable(unsigned IndexTableIndex,
off_t IndexTableOffset) const;
void PrintIndexTable(unsigned SectionIndex, const Elf_Shdr *IT) const;
void PrintExceptionTable(const Elf_Shdr *IT, const Elf_Shdr *EHT,
uint64_t TableEntryOffset) const;
void PrintOpcodes(const uint8_t *Entry, size_t Length, off_t Offset) const;
public:
PrinterContext(ScopedPrinter &SW, const object::ELFFile<ET> *ELF,
const Elf_Shdr *Symtab)
: SW(SW), ELF(ELF), Symtab(Symtab) {}
void PrintUnwindInformation() const;
};
template <typename ET>
const size_t PrinterContext<ET>::IndexTableEntrySize = 8;
template <typename ET>
ErrorOr<StringRef>
PrinterContext<ET>::FunctionAtAddress(unsigned Section,
uint64_t Address) const {
ErrorOr<StringRef> StrTableOrErr = ELF->getStringTableForSymtab(*Symtab);
error(StrTableOrErr.getError());
StringRef StrTable = *StrTableOrErr;
for (const Elf_Sym &Sym : ELF->symbols(Symtab))
if (Sym.st_shndx == Section && Sym.st_value == Address &&
Sym.getType() == ELF::STT_FUNC) {
auto NameOrErr = Sym.getName(StrTable);
if (!NameOrErr) {
// TODO: Actually report errors helpfully.
consumeError(NameOrErr.takeError());
return readobj_error::unknown_symbol;
}
return *NameOrErr;
}
return readobj_error::unknown_symbol;
}
template <typename ET>
const typename object::ELFFile<ET>::Elf_Shdr *
PrinterContext<ET>::FindExceptionTable(unsigned IndexSectionIndex,
off_t IndexTableOffset) const {
/// Iterate through the sections, searching for the relocation section
/// associated with the unwind index table section specified by
/// IndexSectionIndex. Iterate the associated section searching for the
/// relocation associated with the index table entry specified by
/// IndexTableOffset. The symbol is the section symbol for the exception
/// handling table. Use this symbol to recover the actual exception handling
/// table.
for (const Elf_Shdr &Sec : ELF->sections()) {
if (Sec.sh_type != ELF::SHT_REL || Sec.sh_info != IndexSectionIndex)
continue;
ErrorOr<const Elf_Shdr *> SymTabOrErr = ELF->getSection(Sec.sh_link);
error(SymTabOrErr.getError());
const Elf_Shdr *SymTab = *SymTabOrErr;
for (const Elf_Rel &R : ELF->rels(&Sec)) {
if (R.r_offset != static_cast<unsigned>(IndexTableOffset))
continue;
typename object::ELFFile<ET>::Elf_Rela RelA;
RelA.r_offset = R.r_offset;
RelA.r_info = R.r_info;
RelA.r_addend = 0;
const Elf_Sym *Symbol = ELF->getRelocationSymbol(&RelA, SymTab);
ErrorOr<const Elf_Shdr *> Ret =
ELF->getSection(Symbol, SymTab, ShndxTable);
if (std::error_code EC = Ret.getError())
report_fatal_error(EC.message());
return *Ret;
}
}
return nullptr;
}
template <typename ET>
void PrinterContext<ET>::PrintExceptionTable(const Elf_Shdr *IT,
const Elf_Shdr *EHT,
uint64_t TableEntryOffset) const {
ErrorOr<ArrayRef<uint8_t> > Contents = ELF->getSectionContents(EHT);
if (!Contents)
return;
/// ARM EHABI Section 6.2 - The generic model
///
/// An exception-handling table entry for the generic model is laid out as:
///
/// 3 3
/// 1 0 0
/// +-+------------------------------+
/// |0| personality routine offset |
/// +-+------------------------------+
/// | personality routine data ... |
///
///
/// ARM EHABI Section 6.3 - The ARM-defined compact model
///
/// An exception-handling table entry for the compact model looks like:
///
/// 3 3 2 2 2 2
/// 1 0 8 7 4 3 0
/// +-+---+----+-----------------------+
/// |1| 0 | Ix | data for pers routine |
/// +-+---+----+-----------------------+
/// | more personality routine data |
const support::ulittle32_t Word =
*reinterpret_cast<const support::ulittle32_t *>(Contents->data() + TableEntryOffset);
if (Word & 0x80000000) {
SW.printString("Model", StringRef("Compact"));
unsigned PersonalityIndex = (Word & 0x0f000000) >> 24;
SW.printNumber("PersonalityIndex", PersonalityIndex);
switch (PersonalityIndex) {
case AEABI_UNWIND_CPP_PR0:
PrintOpcodes(Contents->data() + TableEntryOffset, 3, 1);
break;
case AEABI_UNWIND_CPP_PR1:
case AEABI_UNWIND_CPP_PR2:
unsigned AdditionalWords = (Word & 0x00ff0000) >> 16;
PrintOpcodes(Contents->data() + TableEntryOffset, 2 + 4 * AdditionalWords,
2);
break;
}
} else {
SW.printString("Model", StringRef("Generic"));
uint64_t Address = PREL31(Word, EHT->sh_addr);
SW.printHex("PersonalityRoutineAddress", Address);
if (ErrorOr<StringRef> Name = FunctionAtAddress(EHT->sh_link, Address))
SW.printString("PersonalityRoutineName", *Name);
}
}
template <typename ET>
void PrinterContext<ET>::PrintOpcodes(const uint8_t *Entry,
size_t Length, off_t Offset) const {
ListScope OCC(SW, "Opcodes");
OpcodeDecoder(OCC.W).Decode(Entry, Offset, Length);
}
template <typename ET>
void PrinterContext<ET>::PrintIndexTable(unsigned SectionIndex,
const Elf_Shdr *IT) const {
ErrorOr<ArrayRef<uint8_t> > Contents = ELF->getSectionContents(IT);
if (!Contents)
return;
/// ARM EHABI Section 5 - Index Table Entries
/// * The first word contains a PREL31 offset to the start of a function with
/// bit 31 clear
/// * The second word contains one of:
/// - The PREL31 offset of the start of the table entry for the function,
/// with bit 31 clear
/// - The exception-handling table entry itself with bit 31 set
/// - The special bit pattern EXIDX_CANTUNWIND, indicating that associated
/// frames cannot be unwound
const support::ulittle32_t *Data =
reinterpret_cast<const support::ulittle32_t *>(Contents->data());
const unsigned Entries = IT->sh_size / IndexTableEntrySize;
ListScope E(SW, "Entries");
for (unsigned Entry = 0; Entry < Entries; ++Entry) {
DictScope E(SW, "Entry");
const support::ulittle32_t Word0 =
Data[Entry * (IndexTableEntrySize / sizeof(*Data)) + 0];
const support::ulittle32_t Word1 =
Data[Entry * (IndexTableEntrySize / sizeof(*Data)) + 1];
if (Word0 & 0x80000000) {
errs() << "corrupt unwind data in section " << SectionIndex << "\n";
continue;
}
const uint64_t Offset = PREL31(Word0, IT->sh_addr);
SW.printHex("FunctionAddress", Offset);
if (ErrorOr<StringRef> Name = FunctionAtAddress(IT->sh_link, Offset))
SW.printString("FunctionName", *Name);
if (Word1 == EXIDX_CANTUNWIND) {
SW.printString("Model", StringRef("CantUnwind"));
continue;
}
if (Word1 & 0x80000000) {
SW.printString("Model", StringRef("Compact (Inline)"));
unsigned PersonalityIndex = (Word1 & 0x0f000000) >> 24;
SW.printNumber("PersonalityIndex", PersonalityIndex);
PrintOpcodes(Contents->data() + Entry * IndexTableEntrySize + 4, 3, 1);
} else {
const Elf_Shdr *EHT =
FindExceptionTable(SectionIndex, Entry * IndexTableEntrySize + 4);
if (ErrorOr<StringRef> Name = ELF->getSectionName(EHT))
SW.printString("ExceptionHandlingTable", *Name);
uint64_t TableEntryOffset = PREL31(Word1, IT->sh_addr);
SW.printHex("TableEntryOffset", TableEntryOffset);
PrintExceptionTable(IT, EHT, TableEntryOffset);
}
}
}
template <typename ET>
void PrinterContext<ET>::PrintUnwindInformation() const {
DictScope UI(SW, "UnwindInformation");
int SectionIndex = 0;
for (const Elf_Shdr &Sec : ELF->sections()) {
if (Sec.sh_type == ELF::SHT_ARM_EXIDX) {
DictScope UIT(SW, "UnwindIndexTable");
SW.printNumber("SectionIndex", SectionIndex);
if (ErrorOr<StringRef> SectionName = ELF->getSectionName(&Sec))
SW.printString("SectionName", *SectionName);
SW.printHex("SectionOffset", Sec.sh_offset);
PrintIndexTable(SectionIndex, &Sec);
}
++SectionIndex;
}
}
}
}
}
#endif
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