mirror of
https://github.com/RPCS3/llvm-mirror.git
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83b930d662
This removes a report_fatal_error from library and avoids checking a section property for every section entry. llvm-svn: 246656
563 lines
20 KiB
C++
563 lines
20 KiB
C++
//===--- ARMEHABIPrinter.h - ARM EHABI Unwind Information Printer ----------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_TOOLS_LLVM_READOBJ_ARMEHABIPRINTER_H
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#define LLVM_TOOLS_LLVM_READOBJ_ARMEHABIPRINTER_H
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#include "Error.h"
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#include "StreamWriter.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/Object/ELF.h"
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#include "llvm/Object/ELFTypes.h"
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#include "llvm/Support/ARMEHABI.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/Endian.h"
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#include "llvm/Support/Format.h"
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#include "llvm/Support/type_traits.h"
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namespace llvm {
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namespace ARM {
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namespace EHABI {
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class OpcodeDecoder {
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StreamWriter &SW;
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raw_ostream &OS;
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struct RingEntry {
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uint8_t Mask;
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uint8_t Value;
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void (OpcodeDecoder::*Routine)(const uint8_t *Opcodes, unsigned &OI);
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};
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static const RingEntry Ring[];
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void Decode_00xxxxxx(const uint8_t *Opcodes, unsigned &OI);
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void Decode_01xxxxxx(const uint8_t *Opcodes, unsigned &OI);
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void Decode_1000iiii_iiiiiiii(const uint8_t *Opcodes, unsigned &OI);
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void Decode_10011101(const uint8_t *Opcodes, unsigned &OI);
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void Decode_10011111(const uint8_t *Opcodes, unsigned &OI);
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void Decode_1001nnnn(const uint8_t *Opcodes, unsigned &OI);
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void Decode_10100nnn(const uint8_t *Opcodes, unsigned &OI);
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void Decode_10101nnn(const uint8_t *Opcodes, unsigned &OI);
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void Decode_10110000(const uint8_t *Opcodes, unsigned &OI);
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void Decode_10110001_0000iiii(const uint8_t *Opcodes, unsigned &OI);
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void Decode_10110010_uleb128(const uint8_t *Opcodes, unsigned &OI);
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void Decode_10110011_sssscccc(const uint8_t *Opcodes, unsigned &OI);
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void Decode_101101nn(const uint8_t *Opcodes, unsigned &OI);
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void Decode_10111nnn(const uint8_t *Opcodes, unsigned &OI);
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void Decode_11000110_sssscccc(const uint8_t *Opcodes, unsigned &OI);
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void Decode_11000111_0000iiii(const uint8_t *Opcodes, unsigned &OI);
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void Decode_11001000_sssscccc(const uint8_t *Opcodes, unsigned &OI);
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void Decode_11001001_sssscccc(const uint8_t *Opcodes, unsigned &OI);
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void Decode_11001yyy(const uint8_t *Opcodes, unsigned &OI);
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void Decode_11000nnn(const uint8_t *Opcodes, unsigned &OI);
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void Decode_11010nnn(const uint8_t *Opcodes, unsigned &OI);
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void Decode_11xxxyyy(const uint8_t *Opcodes, unsigned &OI);
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void PrintGPR(uint16_t GPRMask);
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void PrintRegisters(uint32_t Mask, StringRef Prefix);
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public:
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OpcodeDecoder(StreamWriter &SW) : SW(SW), OS(SW.getOStream()) {}
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void Decode(const uint8_t *Opcodes, off_t Offset, size_t Length);
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};
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const OpcodeDecoder::RingEntry OpcodeDecoder::Ring[] = {
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{ 0xc0, 0x00, &OpcodeDecoder::Decode_00xxxxxx },
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{ 0xc0, 0x40, &OpcodeDecoder::Decode_01xxxxxx },
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{ 0xf0, 0x80, &OpcodeDecoder::Decode_1000iiii_iiiiiiii },
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{ 0xff, 0x9d, &OpcodeDecoder::Decode_10011101 },
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{ 0xff, 0x9f, &OpcodeDecoder::Decode_10011111 },
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{ 0xf0, 0x90, &OpcodeDecoder::Decode_1001nnnn },
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{ 0xf8, 0xa0, &OpcodeDecoder::Decode_10100nnn },
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{ 0xf8, 0xa8, &OpcodeDecoder::Decode_10101nnn },
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{ 0xff, 0xb0, &OpcodeDecoder::Decode_10110000 },
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{ 0xff, 0xb1, &OpcodeDecoder::Decode_10110001_0000iiii },
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{ 0xff, 0xb2, &OpcodeDecoder::Decode_10110010_uleb128 },
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{ 0xff, 0xb3, &OpcodeDecoder::Decode_10110011_sssscccc },
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{ 0xfc, 0xb4, &OpcodeDecoder::Decode_101101nn },
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{ 0xf8, 0xb8, &OpcodeDecoder::Decode_10111nnn },
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{ 0xff, 0xc6, &OpcodeDecoder::Decode_11000110_sssscccc },
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{ 0xff, 0xc7, &OpcodeDecoder::Decode_11000111_0000iiii },
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{ 0xff, 0xc8, &OpcodeDecoder::Decode_11001000_sssscccc },
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{ 0xff, 0xc9, &OpcodeDecoder::Decode_11001001_sssscccc },
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{ 0xc8, 0xc8, &OpcodeDecoder::Decode_11001yyy },
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{ 0xf8, 0xc0, &OpcodeDecoder::Decode_11000nnn },
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{ 0xf8, 0xd0, &OpcodeDecoder::Decode_11010nnn },
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{ 0xc0, 0xc0, &OpcodeDecoder::Decode_11xxxyyy },
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};
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void OpcodeDecoder::Decode_00xxxxxx(const uint8_t *Opcodes, unsigned &OI) {
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uint8_t Opcode = Opcodes[OI++ ^ 3];
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SW.startLine() << format("0x%02X ; vsp = vsp + %u\n", Opcode,
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((Opcode & 0x3f) << 2) + 4);
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}
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void OpcodeDecoder::Decode_01xxxxxx(const uint8_t *Opcodes, unsigned &OI) {
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uint8_t Opcode = Opcodes[OI++ ^ 3];
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SW.startLine() << format("0x%02X ; vsp = vsp - %u\n", Opcode,
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((Opcode & 0x3f) << 2) + 4);
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}
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void OpcodeDecoder::Decode_1000iiii_iiiiiiii(const uint8_t *Opcodes,
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unsigned &OI) {
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uint8_t Opcode0 = Opcodes[OI++ ^ 3];
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uint8_t Opcode1 = Opcodes[OI++ ^ 3];
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uint16_t GPRMask = (Opcode1 << 4) | ((Opcode0 & 0x0f) << 12);
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SW.startLine()
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<< format("0x%02X 0x%02X ; %s",
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Opcode0, Opcode1, GPRMask ? "pop " : "refuse to unwind");
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if (GPRMask)
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PrintGPR(GPRMask);
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OS << '\n';
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}
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void OpcodeDecoder::Decode_10011101(const uint8_t *Opcodes, unsigned &OI) {
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uint8_t Opcode = Opcodes[OI++ ^ 3];
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SW.startLine() << format("0x%02X ; reserved (ARM MOVrr)\n", Opcode);
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}
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void OpcodeDecoder::Decode_10011111(const uint8_t *Opcodes, unsigned &OI) {
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uint8_t Opcode = Opcodes[OI++ ^ 3];
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SW.startLine() << format("0x%02X ; reserved (WiMMX MOVrr)\n", Opcode);
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}
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void OpcodeDecoder::Decode_1001nnnn(const uint8_t *Opcodes, unsigned &OI) {
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uint8_t Opcode = Opcodes[OI++ ^ 3];
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SW.startLine() << format("0x%02X ; vsp = r%u\n", Opcode, (Opcode & 0x0f));
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}
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void OpcodeDecoder::Decode_10100nnn(const uint8_t *Opcodes, unsigned &OI) {
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uint8_t Opcode = Opcodes[OI++ ^ 3];
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SW.startLine() << format("0x%02X ; pop ", Opcode);
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PrintGPR((((1 << ((Opcode & 0x7) + 1)) - 1) << 4));
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OS << '\n';
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}
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void OpcodeDecoder::Decode_10101nnn(const uint8_t *Opcodes, unsigned &OI) {
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uint8_t Opcode = Opcodes[OI++ ^ 3];
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SW.startLine() << format("0x%02X ; pop ", Opcode);
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PrintGPR((((1 << ((Opcode & 0x7) + 1)) - 1) << 4) | (1 << 14));
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OS << '\n';
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}
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void OpcodeDecoder::Decode_10110000(const uint8_t *Opcodes, unsigned &OI) {
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uint8_t Opcode = Opcodes[OI++ ^ 3];
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SW.startLine() << format("0x%02X ; finish\n", Opcode);
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}
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void OpcodeDecoder::Decode_10110001_0000iiii(const uint8_t *Opcodes,
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unsigned &OI) {
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uint8_t Opcode0 = Opcodes[OI++ ^ 3];
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uint8_t Opcode1 = Opcodes[OI++ ^ 3];
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SW.startLine()
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<< format("0x%02X 0x%02X ; %s", Opcode0, Opcode1,
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((Opcode1 & 0xf0) || Opcode1 == 0x00) ? "spare" : "pop ");
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if (((Opcode1 & 0xf0) == 0x00) && Opcode1)
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PrintGPR((Opcode1 & 0x0f));
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OS << '\n';
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}
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void OpcodeDecoder::Decode_10110010_uleb128(const uint8_t *Opcodes,
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unsigned &OI) {
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uint8_t Opcode = Opcodes[OI++ ^ 3];
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SW.startLine() << format("0x%02X ", Opcode);
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SmallVector<uint8_t, 4> ULEB;
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do { ULEB.push_back(Opcodes[OI ^ 3]); } while (Opcodes[OI++ ^ 3] & 0x80);
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for (unsigned BI = 0, BE = ULEB.size(); BI != BE; ++BI)
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OS << format("0x%02X ", ULEB[BI]);
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uint64_t Value = 0;
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for (unsigned BI = 0, BE = ULEB.size(); BI != BE; ++BI)
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Value = Value | ((ULEB[BI] & 0x7f) << (7 * BI));
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OS << format("; vsp = vsp + %" PRIu64 "\n", 0x204 + (Value << 2));
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}
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void OpcodeDecoder::Decode_10110011_sssscccc(const uint8_t *Opcodes,
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unsigned &OI) {
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uint8_t Opcode0 = Opcodes[OI++ ^ 3];
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uint8_t Opcode1 = Opcodes[OI++ ^ 3];
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SW.startLine() << format("0x%02X 0x%02X ; pop ", Opcode0, Opcode1);
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uint8_t Start = ((Opcode1 & 0xf0) >> 4);
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uint8_t Count = ((Opcode1 & 0x0f) >> 0);
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PrintRegisters((((1 << (Count + 1)) - 1) << Start), "d");
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OS << '\n';
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}
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void OpcodeDecoder::Decode_101101nn(const uint8_t *Opcodes, unsigned &OI) {
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uint8_t Opcode = Opcodes[OI++ ^ 3];
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SW.startLine() << format("0x%02X ; spare\n", Opcode);
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}
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void OpcodeDecoder::Decode_10111nnn(const uint8_t *Opcodes, unsigned &OI) {
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uint8_t Opcode = Opcodes[OI++ ^ 3];
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SW.startLine() << format("0x%02X ; pop ", Opcode);
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PrintRegisters((((1 << ((Opcode & 0x07) + 1)) - 1) << 8), "d");
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OS << '\n';
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}
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void OpcodeDecoder::Decode_11000110_sssscccc(const uint8_t *Opcodes,
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unsigned &OI) {
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uint8_t Opcode0 = Opcodes[OI++ ^ 3];
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uint8_t Opcode1 = Opcodes[OI++ ^ 3];
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SW.startLine() << format("0x%02X 0x%02X ; pop ", Opcode0, Opcode1);
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uint8_t Start = ((Opcode1 & 0xf0) >> 4);
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uint8_t Count = ((Opcode1 & 0x0f) >> 0);
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PrintRegisters((((1 << (Count + 1)) - 1) << Start), "wR");
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OS << '\n';
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}
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void OpcodeDecoder::Decode_11000111_0000iiii(const uint8_t *Opcodes,
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unsigned &OI) {
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uint8_t Opcode0 = Opcodes[OI++ ^ 3];
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uint8_t Opcode1 = Opcodes[OI++ ^ 3];
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SW.startLine()
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<< format("0x%02X 0x%02X ; %s", Opcode0, Opcode1,
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((Opcode1 & 0xf0) || Opcode1 == 0x00) ? "spare" : "pop ");
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if ((Opcode1 & 0xf0) == 0x00 && Opcode1)
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PrintRegisters(Opcode1 & 0x0f, "wCGR");
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OS << '\n';
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}
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void OpcodeDecoder::Decode_11001000_sssscccc(const uint8_t *Opcodes,
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unsigned &OI) {
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uint8_t Opcode0 = Opcodes[OI++ ^ 3];
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uint8_t Opcode1 = Opcodes[OI++ ^ 3];
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SW.startLine() << format("0x%02X 0x%02X ; pop ", Opcode0, Opcode1);
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uint8_t Start = 16 + ((Opcode1 & 0xf0) >> 4);
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uint8_t Count = ((Opcode1 & 0x0f) >> 0);
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PrintRegisters((((1 << (Count + 1)) - 1) << Start), "d");
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OS << '\n';
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}
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void OpcodeDecoder::Decode_11001001_sssscccc(const uint8_t *Opcodes,
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unsigned &OI) {
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uint8_t Opcode0 = Opcodes[OI++ ^ 3];
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uint8_t Opcode1 = Opcodes[OI++ ^ 3];
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SW.startLine() << format("0x%02X 0x%02X ; pop ", Opcode0, Opcode1);
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uint8_t Start = ((Opcode1 & 0xf0) >> 4);
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uint8_t Count = ((Opcode1 & 0x0f) >> 0);
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PrintRegisters((((1 << (Count + 1)) - 1) << Start), "d");
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OS << '\n';
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}
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void OpcodeDecoder::Decode_11001yyy(const uint8_t *Opcodes, unsigned &OI) {
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uint8_t Opcode = Opcodes[OI++ ^ 3];
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SW.startLine() << format("0x%02X ; spare\n", Opcode);
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}
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void OpcodeDecoder::Decode_11000nnn(const uint8_t *Opcodes, unsigned &OI) {
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uint8_t Opcode = Opcodes[OI++ ^ 3];
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SW.startLine() << format("0x%02X ; pop ", Opcode);
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PrintRegisters((((1 << ((Opcode & 0x07) + 1)) - 1) << 10), "wR");
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OS << '\n';
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}
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void OpcodeDecoder::Decode_11010nnn(const uint8_t *Opcodes, unsigned &OI) {
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uint8_t Opcode = Opcodes[OI++ ^ 3];
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SW.startLine() << format("0x%02X ; pop ", Opcode);
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PrintRegisters((((1 << ((Opcode & 0x07) + 1)) - 1) << 8), "d");
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OS << '\n';
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}
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void OpcodeDecoder::Decode_11xxxyyy(const uint8_t *Opcodes, unsigned &OI) {
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uint8_t Opcode = Opcodes[OI++ ^ 3];
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SW.startLine() << format("0x%02X ; spare\n", Opcode);
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}
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void OpcodeDecoder::PrintGPR(uint16_t GPRMask) {
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static const char *GPRRegisterNames[16] = {
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"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10",
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"fp", "ip", "sp", "lr", "pc"
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};
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OS << '{';
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bool Comma = false;
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for (unsigned RI = 0, RE = 17; RI < RE; ++RI) {
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if (GPRMask & (1 << RI)) {
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if (Comma)
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OS << ", ";
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OS << GPRRegisterNames[RI];
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Comma = true;
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}
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}
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OS << '}';
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}
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void OpcodeDecoder::PrintRegisters(uint32_t VFPMask, StringRef Prefix) {
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OS << '{';
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bool Comma = false;
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for (unsigned RI = 0, RE = 32; RI < RE; ++RI) {
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if (VFPMask & (1 << RI)) {
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if (Comma)
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OS << ", ";
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OS << Prefix << RI;
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Comma = true;
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}
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}
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OS << '}';
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}
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void OpcodeDecoder::Decode(const uint8_t *Opcodes, off_t Offset, size_t Length) {
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for (unsigned OCI = Offset; OCI < Length + Offset; ) {
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bool Decoded = false;
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for (unsigned REI = 0, REE = array_lengthof(Ring);
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REI != REE && !Decoded; ++REI) {
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if ((Opcodes[OCI ^ 3] & Ring[REI].Mask) == Ring[REI].Value) {
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(this->*Ring[REI].Routine)(Opcodes, OCI);
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Decoded = true;
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break;
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}
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}
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if (!Decoded)
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SW.startLine() << format("0x%02X ; reserved\n", Opcodes[OCI++ ^ 3]);
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}
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}
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template <typename ET>
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class PrinterContext {
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typedef typename object::ELFFile<ET>::Elf_Sym Elf_Sym;
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typedef typename object::ELFFile<ET>::Elf_Shdr Elf_Shdr;
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typedef typename object::ELFFile<ET>::Elf_Rel Elf_Rel;
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typedef typename object::ELFFile<ET>::Elf_Word Elf_Word;
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StreamWriter &SW;
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const object::ELFFile<ET> *ELF;
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const Elf_Shdr *Symtab;
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ArrayRef<Elf_Word> ShndxTable;
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static const size_t IndexTableEntrySize;
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static uint64_t PREL31(uint32_t Address, uint32_t Place) {
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uint64_t Location = Address & 0x7fffffff;
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if (Location & 0x04000000)
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Location |= (uint64_t) ~0x7fffffff;
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return Location + Place;
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}
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ErrorOr<StringRef> FunctionAtAddress(unsigned Section, uint64_t Address) const;
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const Elf_Shdr *FindExceptionTable(unsigned IndexTableIndex,
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off_t IndexTableOffset) const;
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void PrintIndexTable(unsigned SectionIndex, const Elf_Shdr *IT) const;
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void PrintExceptionTable(const Elf_Shdr *IT, const Elf_Shdr *EHT,
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uint64_t TableEntryOffset) const;
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void PrintOpcodes(const uint8_t *Entry, size_t Length, off_t Offset) const;
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public:
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PrinterContext(StreamWriter &SW, const object::ELFFile<ET> *ELF,
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const Elf_Shdr *Symtab)
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: SW(SW), ELF(ELF), Symtab(Symtab) {}
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void PrintUnwindInformation() const;
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};
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template <typename ET>
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const size_t PrinterContext<ET>::IndexTableEntrySize = 8;
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template <typename ET>
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ErrorOr<StringRef>
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PrinterContext<ET>::FunctionAtAddress(unsigned Section,
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uint64_t Address) const {
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ErrorOr<StringRef> StrTableOrErr = ELF->getStringTableForSymtab(*Symtab);
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error(StrTableOrErr.getError());
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StringRef StrTable = *StrTableOrErr;
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for (const Elf_Sym &Sym : ELF->symbols(Symtab))
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if (Sym.st_shndx == Section && Sym.st_value == Address &&
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Sym.getType() == ELF::STT_FUNC)
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return Sym.getName(StrTable);
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return readobj_error::unknown_symbol;
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}
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template <typename ET>
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const typename object::ELFFile<ET>::Elf_Shdr *
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PrinterContext<ET>::FindExceptionTable(unsigned IndexSectionIndex,
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off_t IndexTableOffset) const {
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/// Iterate through the sections, searching for the relocation section
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/// associated with the unwind index table section specified by
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/// IndexSectionIndex. Iterate the associated section searching for the
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/// relocation associated with the index table entry specified by
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/// IndexTableOffset. The symbol is the section symbol for the exception
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/// handling table. Use this symbol to recover the actual exception handling
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/// table.
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for (const Elf_Shdr &Sec : ELF->sections()) {
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if (Sec.sh_type != ELF::SHT_REL || Sec.sh_info != IndexSectionIndex)
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continue;
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ErrorOr<const Elf_Shdr *> SymTabOrErr = ELF->getSection(Sec.sh_link);
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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
|
|
|