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Unified Diff: obsolete/gdb-utils/src/dwarf_reader/dwarf_vm_decode.cc

Issue 10928195: First round of dead file removal (Closed) Base URL: https://github.com/samclegg/nativeclient-sdk.git@master
Patch Set: Created 8 years, 3 months ago
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Index: obsolete/gdb-utils/src/dwarf_reader/dwarf_vm_decode.cc
diff --git a/obsolete/gdb-utils/src/dwarf_reader/dwarf_vm_decode.cc b/obsolete/gdb-utils/src/dwarf_reader/dwarf_vm_decode.cc
deleted file mode 100644
index ce2e9f9e5673c4353158ce2cdae8838b81ca13a4..0000000000000000000000000000000000000000
--- a/obsolete/gdb-utils/src/dwarf_reader/dwarf_vm_decode.cc
+++ /dev/null
@@ -1,930 +0,0 @@
-// Copyright 2010 Google, Inc. All Rights reserved
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
- // met:
-//
-// * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-// * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-// * Neither the path of Google Inc. nor the paths of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-#include <vector>
-
-#include "common/dwarf/bytereader-inl.h"
-#include "common/dwarf/bytereader.h"
-#include "common/dwarf/dwarf2enums.h"
-
-#include "common/types.h"
-#include "dwarf_reader/dwarf_parse.h"
-#include "dwarf_reader/dwarf_vm.h"
-
-#ifdef WIN32
-#pragma warning (disable:4244)
-#endif
-
-using namespace dwarf2reader;
-
-#define Error(x) do { vm->ErrorString(x); return 0; } while(0)
-#define NEEDS(n) if (stack_.size() < (n)) Error("Stack underflow");
-
-namespace dwarf_reader {
-
-#define address_t uint32
-#define signed_address_t int32
-#define StackTop() (&stack_.back())
-#define StackSecond() (&stack_[stack_.size()-2])
-#define StackThird() (&stack_[stack_.size()-3])
-#define SignedStackTop() ((signed_address_t*) StackTop())
-#define SignedStackSecond() ((signed_address_t*) StackSecond())
-#define SignedStackThird() ((signed_address_t*) StackThird())
-
-uint32_t DwarfRun32(IDwarfVM *vm, ByteReader *reader, const char *program, int length) {
- std::vector<uint32> stack_;
- const char *program_end = program + length;
-
- stack_.push_back(0);
- while (program < program_end) {
- uint8 opcode = reader->ReadOneByte(program);
- program++;
- switch (opcode) {
-
- // Register name operators
- case DW_OP_reg0:
- case DW_OP_reg1:
- case DW_OP_reg2:
- case DW_OP_reg3:
- case DW_OP_reg4:
- case DW_OP_reg5:
- case DW_OP_reg6:
- case DW_OP_reg7:
- case DW_OP_reg8:
- case DW_OP_reg9:
- case DW_OP_reg10:
- case DW_OP_reg11:
- case DW_OP_reg12:
- case DW_OP_reg13:
- case DW_OP_reg14:
- case DW_OP_reg15:
- case DW_OP_reg16:
- case DW_OP_reg17:
- case DW_OP_reg18:
- case DW_OP_reg19:
- case DW_OP_reg20:
- case DW_OP_reg21:
- case DW_OP_reg22:
- case DW_OP_reg23:
- case DW_OP_reg24:
- case DW_OP_reg25:
- case DW_OP_reg26:
- case DW_OP_reg27:
- case DW_OP_reg28:
- case DW_OP_reg29:
- case DW_OP_reg30:
- case DW_OP_reg31:
- stack_.push_back(opcode - DW_OP_reg0);
- break;
-
- case DW_OP_regX: {
- size_t len;
- stack_.push_back(reader->ReadUnsignedLEB128(program, &len));
- program += len;
- break;
- }
-
- // Literal encodings
-
- case DW_OP_lit0:
- case DW_OP_lit1:
- case DW_OP_lit2:
- case DW_OP_lit3:
- case DW_OP_lit4:
- case DW_OP_lit5:
- case DW_OP_lit6:
- case DW_OP_lit7:
- case DW_OP_lit8:
- case DW_OP_lit9:
- case DW_OP_lit10:
- case DW_OP_lit11:
- case DW_OP_lit12:
- case DW_OP_lit13:
- case DW_OP_lit14:
- case DW_OP_lit15:
- case DW_OP_lit16:
- case DW_OP_lit17:
- case DW_OP_lit18:
- case DW_OP_lit19:
- case DW_OP_lit20:
- case DW_OP_lit21:
- case DW_OP_lit22:
- case DW_OP_lit23:
- case DW_OP_lit24:
- case DW_OP_lit25:
- case DW_OP_lit26:
- case DW_OP_lit27:
- case DW_OP_lit28:
- case DW_OP_lit29:
- case DW_OP_lit30:
- case DW_OP_lit31:
- stack_.push_back(opcode - DW_OP_lit0);
- break;
-
- case DW_OP_addr:
- stack_.push_back(reader->ReadAddress(program));
- program += reader->AddressSize();
- break;
-
- case DW_OP_const1u:
- stack_.push_back(reader->ReadOneByte(program));
- program++;
- break;
-
- case DW_OP_const1s:
- stack_.push_back(static_cast<int8>(reader->ReadOneByte(program)));
- program++;
- break;
-
- case DW_OP_const2u:
- stack_.push_back(reader->ReadTwoBytes(program));
- program += 2;
- break;
-
- case DW_OP_const2s:
- stack_.push_back(static_cast<int16>(reader->ReadTwoBytes(program)));
- program += 2;
- break;
-
- case DW_OP_const4u:
- stack_.push_back(reader->ReadFourBytes(program));
- program += 4;
- break;
-
- case DW_OP_const4s:
- stack_.push_back(static_cast<int32>(reader->ReadFourBytes(program)));
- program += 4;
- break;
-
- case DW_OP_const8u:
- stack_.push_back(reader->ReadEightBytes(program));
- program += 8;
- break;
-
- case DW_OP_const8s:
- stack_.push_back(static_cast<int64>(reader->ReadEightBytes(program)));
- program += 8;
- break;
-
- case DW_OP_constu: {
- size_t len;
- stack_.push_back(reader->ReadUnsignedLEB128(program, &len));
- program += len;
- break;
- }
-
- case DW_OP_consts: {
- size_t len;
- stack_.push_back(reader->ReadSignedLEB128(program, &len));
- program += len;
- break;
- }
-
- // Register based addressing
-
- case DW_OP_fbreg: {
- size_t len;
- stack_.push_back(reader->ReadSignedLEB128(program, &len) + vm->ReadFrameBase());
- program += len;
- break;
- }
-
- case DW_OP_breg0:
- case DW_OP_breg1:
- case DW_OP_breg2:
- case DW_OP_breg3:
- case DW_OP_breg4:
- case DW_OP_breg5:
- case DW_OP_breg6:
- case DW_OP_breg7:
- case DW_OP_breg8:
- case DW_OP_breg9:
- case DW_OP_breg10:
- case DW_OP_breg11:
- case DW_OP_breg12:
- case DW_OP_breg13:
- case DW_OP_breg14:
- case DW_OP_breg15:
- case DW_OP_breg16:
- case DW_OP_breg17:
- case DW_OP_breg18:
- case DW_OP_breg19:
- case DW_OP_breg20:
- case DW_OP_breg21:
- case DW_OP_breg22:
- case DW_OP_breg23:
- case DW_OP_breg24:
- case DW_OP_breg25:
- case DW_OP_breg26:
- case DW_OP_breg27:
- case DW_OP_breg28:
- case DW_OP_breg29:
- case DW_OP_breg30:
- case DW_OP_breg31: {
- size_t len;
- stack_.push_back(reader->ReadSignedLEB128(program, &len) +
- vm->ReadRegister(opcode - DW_OP_breg0));
- program += len;
- break;
- }
-
- case DW_OP_bregX: {
- size_t len;
- uint64 reg = reader->ReadUnsignedLEB128(program, &len);
- program += len;
- stack_.push_back(reader->ReadSignedLEB128(program, &len) + vm->ReadRegister(reg));
- program += len;
- break;
- }
-
- // Stack operations
-
- case DW_OP_dup:
- NEEDS(1)
- stack_.push_back(*StackTop());
- break;
-
- case DW_OP_drop:
- NEEDS(1)
- stack_.pop_back();
- break;
-
- case DW_OP_pick: {
- int ofs = stack_.size() - 1 - reader->ReadOneByte(program);
- program++;
- if (ofs < 0) Error("DW_OP_pick: bad offset");
- stack_.push_back(stack_[ofs]);
- break;
- }
-
- case DW_OP_over:
- NEEDS(2)
- stack_.push_back(*StackSecond());
- break;
-
- case DW_OP_swap: {
- NEEDS(2)
- address_t tmp = *StackTop();
- *StackTop() = *StackSecond();
- *StackSecond() = tmp;
- break;
- }
-
- case DW_OP_rot: {
- NEEDS(3)
- address_t tmp = *StackTop();
- *StackTop() = *StackThird();
- *StackThird() = *StackSecond();
- *StackSecond() = tmp;
- break;
- }
-
- case DW_OP_deref:
- NEEDS(1)
- *StackTop() = vm->ReadMemory(*StackTop(), reader->AddressSize());
- break;
-
- case DW_OP_deref_size:
- NEEDS(1)
- *StackTop() = vm->ReadMemory(*StackTop(), *program++);
- break;
-
- // DW_OP_xderef and DW_OP_xderef_size not supported.
-
- // Arithmetic and logical operations
-
- case DW_OP_abs:
- NEEDS(1)
- *StackTop() = abs(*SignedStackTop());
- break;
-
- case DW_OP_and:
- NEEDS(2)
- *StackSecond() &= *StackTop();
- stack_.pop_back();
- break;
-
- case DW_OP_div:
- NEEDS(2)
- *SignedStackSecond() /= *SignedStackTop();
- stack_.pop_back();
- break;
-
- case DW_OP_minus:
- NEEDS(2)
- *StackSecond() -= *StackTop();
- stack_.pop_back();
- break;
-
- case DW_OP_mod:
- NEEDS(2)
- *StackSecond() %= *StackTop();
- stack_.pop_back();
- break;
-
- case DW_OP_mul:
- NEEDS(2)
- *StackSecond() *= *StackTop();
- stack_.pop_back();
- break;
-
- case DW_OP_neg:
- NEEDS(1)
- *SignedStackTop() = -*SignedStackTop();
- break;
-
- case DW_OP_not:
- NEEDS(1)
- *StackTop() = ~*StackTop();
- break;
-
- case DW_OP_or:
- NEEDS(2)
- *StackSecond() |= *StackTop();
- stack_.pop_back();
- break;
-
- case DW_OP_plus:
- NEEDS(2)
- *StackSecond() += *StackTop();
- stack_.pop_back();
- break;
-
- case DW_OP_plus_uconst: {
- NEEDS(1)
- size_t len;
- *StackTop() += reader->ReadUnsignedLEB128(program, &len);
- program += len;
- break;
- }
-
- case DW_OP_shl:
- NEEDS(2)
- *StackSecond() <<= *StackTop();
- stack_.pop_back();
- break;
-
- case DW_OP_shr:
- NEEDS(2)
- *StackSecond() >>= *StackTop();
- stack_.pop_back();
- break;
-
- case DW_OP_shra:
- NEEDS(2)
- *SignedStackSecond() >>= *StackTop();
- stack_.pop_back();
- break;
-
- case DW_OP_xor:
- NEEDS(2)
- *StackSecond() ^= *StackTop();
- stack_.pop_back();
- break;
-
- // Control flow operators
-
- case DW_OP_le:
- NEEDS(2)
- *StackSecond() = *SignedStackSecond() <= *SignedStackTop();
- stack_.pop_back();
- break;
-
- case DW_OP_ge:
- NEEDS(2)
- *StackSecond() = *SignedStackSecond() >= *SignedStackTop();
- stack_.pop_back();
- break;
-
- case DW_OP_eq:
- NEEDS(2)
- *StackSecond() = *SignedStackSecond() == *SignedStackTop();
- stack_.pop_back();
- break;
-
- case DW_OP_lt:
- NEEDS(2)
- *StackSecond() = *SignedStackSecond() < *SignedStackTop();
- stack_.pop_back();
- break;
-
- case DW_OP_gt:
- NEEDS(2)
- *StackSecond() = *SignedStackSecond() > *SignedStackTop();
- stack_.pop_back();
- break;
-
- case DW_OP_ne:
- NEEDS(2)
- *StackSecond() = *SignedStackSecond() != *SignedStackTop();
- stack_.pop_back();
- break;
-
- case DW_OP_skip:
- program += 2 + static_cast<int16>(reader->ReadTwoBytes(program));
- break;
-
- case DW_OP_bra: {
- NEEDS(1)
- if (*StackTop()) {
- program += static_cast<int16>(reader->ReadTwoBytes(program));
- }
- program += 2;
- stack_.pop_back();
- break;
- }
-
- // Special operations
-
- case DW_OP_piece:
- // The result at the top of the stack has a 'piece size' given
- // by the argument. We do not currently do anything with this number.
- size_t len;
- reader->ReadUnsignedLEB128(program, &len);
- program += len;
- break;
-
- case DW_OP_nop:
- break;
-
- default:
- Error("Unknown opcode");
- }
- }
-
- if (program != program_end) Error("Invalid program length");
- return *StackTop();
-}
-
-#undef address_t
-#undef signed_address_t
-#undef StackTop
-#undef StackSecond
-#undef StackThird
-#undef SignedStackTop
-#undef SignedStackSecond
-#undef SignedStackThird
-
-#define address_t uint64
-#define signed_address_t int64
-#define StackTop() (&stack_.back())
-#define StackSecond() (&stack_[stack_.size()-2])
-#define StackThird() (&stack_[stack_.size()-3])
-#define SignedStackTop() ((signed_address_t*) StackTop())
-#define SignedStackSecond() ((signed_address_t*) StackSecond())
-#define SignedStackThird() ((signed_address_t*) StackThird())
-
-uint64_t DwarfRun64(IDwarfVM *vm, ByteReader *reader, const char *program, int length) {
- std::vector<uint32> stack_;
- const char *program_end = program + length;
-
- stack_.push_back(0);
- while (program < program_end) {
- uint8 opcode = reader->ReadOneByte(program);
- program++;
- switch (opcode) {
-
- // Register name operators
- case DW_OP_reg0:
- case DW_OP_reg1:
- case DW_OP_reg2:
- case DW_OP_reg3:
- case DW_OP_reg4:
- case DW_OP_reg5:
- case DW_OP_reg6:
- case DW_OP_reg7:
- case DW_OP_reg8:
- case DW_OP_reg9:
- case DW_OP_reg10:
- case DW_OP_reg11:
- case DW_OP_reg12:
- case DW_OP_reg13:
- case DW_OP_reg14:
- case DW_OP_reg15:
- case DW_OP_reg16:
- case DW_OP_reg17:
- case DW_OP_reg18:
- case DW_OP_reg19:
- case DW_OP_reg20:
- case DW_OP_reg21:
- case DW_OP_reg22:
- case DW_OP_reg23:
- case DW_OP_reg24:
- case DW_OP_reg25:
- case DW_OP_reg26:
- case DW_OP_reg27:
- case DW_OP_reg28:
- case DW_OP_reg29:
- case DW_OP_reg30:
- case DW_OP_reg31:
- stack_.push_back(opcode - DW_OP_reg0);
- break;
-
- case DW_OP_regX: {
- size_t len;
- stack_.push_back(reader->ReadUnsignedLEB128(program, &len));
- program += len;
- break;
- }
-
- // Literal encodings
-
- case DW_OP_lit0:
- case DW_OP_lit1:
- case DW_OP_lit2:
- case DW_OP_lit3:
- case DW_OP_lit4:
- case DW_OP_lit5:
- case DW_OP_lit6:
- case DW_OP_lit7:
- case DW_OP_lit8:
- case DW_OP_lit9:
- case DW_OP_lit10:
- case DW_OP_lit11:
- case DW_OP_lit12:
- case DW_OP_lit13:
- case DW_OP_lit14:
- case DW_OP_lit15:
- case DW_OP_lit16:
- case DW_OP_lit17:
- case DW_OP_lit18:
- case DW_OP_lit19:
- case DW_OP_lit20:
- case DW_OP_lit21:
- case DW_OP_lit22:
- case DW_OP_lit23:
- case DW_OP_lit24:
- case DW_OP_lit25:
- case DW_OP_lit26:
- case DW_OP_lit27:
- case DW_OP_lit28:
- case DW_OP_lit29:
- case DW_OP_lit30:
- case DW_OP_lit31:
- stack_.push_back(opcode - DW_OP_lit0);
- break;
-
- case DW_OP_addr:
- stack_.push_back(reader->ReadAddress(program));
- program += reader->AddressSize();
- break;
-
- case DW_OP_const1u:
- stack_.push_back(reader->ReadOneByte(program));
- program++;
- break;
-
- case DW_OP_const1s:
- stack_.push_back(static_cast<int8>(reader->ReadOneByte(program)));
- program++;
- break;
-
- case DW_OP_const2u:
- stack_.push_back(reader->ReadTwoBytes(program));
- program += 2;
- break;
-
- case DW_OP_const2s:
- stack_.push_back(static_cast<int16>(reader->ReadTwoBytes(program)));
- program += 2;
- break;
-
- case DW_OP_const4u:
- stack_.push_back(reader->ReadFourBytes(program));
- program += 4;
- break;
-
- case DW_OP_const4s:
- stack_.push_back(static_cast<int32>(reader->ReadFourBytes(program)));
- program += 4;
- break;
-
- case DW_OP_const8u:
- stack_.push_back(reader->ReadEightBytes(program));
- program += 8;
- break;
-
- case DW_OP_const8s:
- stack_.push_back(static_cast<int64>(reader->ReadEightBytes(program)));
- program += 8;
- break;
-
- case DW_OP_constu: {
- size_t len;
- stack_.push_back(reader->ReadUnsignedLEB128(program, &len));
- program += len;
- break;
- }
-
- case DW_OP_consts: {
- size_t len;
- stack_.push_back(reader->ReadSignedLEB128(program, &len));
- program += len;
- break;
- }
-
- // Register based addressing
-
- case DW_OP_fbreg: {
- size_t len;
- stack_.push_back(reader->ReadSignedLEB128(program, &len) + vm->ReadFrameBase());
- program += len;
- break;
- }
-
- case DW_OP_breg0:
- case DW_OP_breg1:
- case DW_OP_breg2:
- case DW_OP_breg3:
- case DW_OP_breg4:
- case DW_OP_breg5:
- case DW_OP_breg6:
- case DW_OP_breg7:
- case DW_OP_breg8:
- case DW_OP_breg9:
- case DW_OP_breg10:
- case DW_OP_breg11:
- case DW_OP_breg12:
- case DW_OP_breg13:
- case DW_OP_breg14:
- case DW_OP_breg15:
- case DW_OP_breg16:
- case DW_OP_breg17:
- case DW_OP_breg18:
- case DW_OP_breg19:
- case DW_OP_breg20:
- case DW_OP_breg21:
- case DW_OP_breg22:
- case DW_OP_breg23:
- case DW_OP_breg24:
- case DW_OP_breg25:
- case DW_OP_breg26:
- case DW_OP_breg27:
- case DW_OP_breg28:
- case DW_OP_breg29:
- case DW_OP_breg30:
- case DW_OP_breg31: {
- size_t len;
- stack_.push_back(reader->ReadSignedLEB128(program, &len) +
- vm->ReadRegister(opcode - DW_OP_breg0));
- program += len;
- break;
- }
-
- case DW_OP_bregX: {
- size_t len;
- uint64 reg = reader->ReadUnsignedLEB128(program, &len);
- program += len;
- stack_.push_back(reader->ReadSignedLEB128(program, &len) + vm->ReadRegister(reg));
- program += len;
- break;
- }
-
- // Stack operations
-
- case DW_OP_dup:
- NEEDS(1)
- stack_.push_back(*StackTop());
- break;
-
- case DW_OP_drop:
- NEEDS(1)
- stack_.pop_back();
- break;
-
- case DW_OP_pick: {
- int ofs = stack_.size() - 1 - reader->ReadOneByte(program);
- program++;
- if (ofs < 0) Error("DW_OP_pick: bad offset");
- stack_.push_back(stack_[ofs]);
- break;
- }
-
- case DW_OP_over:
- NEEDS(2)
- stack_.push_back(*StackSecond());
- break;
-
- case DW_OP_swap: {
- NEEDS(2)
- address_t tmp = *StackTop();
- *StackTop() = *StackSecond();
- *StackSecond() = tmp;
- break;
- }
-
- case DW_OP_rot: {
- NEEDS(3)
- address_t tmp = *StackTop();
- *StackTop() = *StackThird();
- *StackThird() = *StackSecond();
- *StackSecond() = tmp;
- break;
- }
-
- case DW_OP_deref:
- NEEDS(1)
- *StackTop() = vm->ReadMemory(*StackTop(), reader->AddressSize());
- break;
-
- case DW_OP_deref_size:
- NEEDS(1)
- *StackTop() = vm->ReadMemory(*StackTop(), *program++);
- break;
-
- // DW_OP_xderef and DW_OP_xderef_size not supported.
-
- // Arithmetic and logical operations
-
- case DW_OP_abs:
- NEEDS(1)
- *StackTop() = abs(*SignedStackTop());
- break;
-
- case DW_OP_and:
- NEEDS(2)
- *StackSecond() &= *StackTop();
- stack_.pop_back();
- break;
-
- case DW_OP_div:
- NEEDS(2)
- *SignedStackSecond() /= *SignedStackTop();
- stack_.pop_back();
- break;
-
- case DW_OP_minus:
- NEEDS(2)
- *StackSecond() -= *StackTop();
- stack_.pop_back();
- break;
-
- case DW_OP_mod:
- NEEDS(2)
- *StackSecond() %= *StackTop();
- stack_.pop_back();
- break;
-
- case DW_OP_mul:
- NEEDS(2)
- *StackSecond() *= *StackTop();
- stack_.pop_back();
- break;
-
- case DW_OP_neg:
- NEEDS(1)
- *SignedStackTop() = -*SignedStackTop();
- break;
-
- case DW_OP_not:
- NEEDS(1)
- *StackTop() = ~*StackTop();
- break;
-
- case DW_OP_or:
- NEEDS(2)
- *StackSecond() |= *StackTop();
- stack_.pop_back();
- break;
-
- case DW_OP_plus:
- NEEDS(2)
- *StackSecond() += *StackTop();
- stack_.pop_back();
- break;
-
- case DW_OP_plus_uconst: {
- NEEDS(1)
- size_t len;
- *StackTop() += reader->ReadUnsignedLEB128(program, &len);
- program += len;
- break;
- }
-
- case DW_OP_shl:
- NEEDS(2)
- *StackSecond() <<= *StackTop();
- stack_.pop_back();
- break;
-
- case DW_OP_shr:
- NEEDS(2)
- *StackSecond() >>= *StackTop();
- stack_.pop_back();
- break;
-
- case DW_OP_shra:
- NEEDS(2)
- *SignedStackSecond() >>= *StackTop();
- stack_.pop_back();
- break;
-
- case DW_OP_xor:
- NEEDS(2)
- *StackSecond() ^= *StackTop();
- stack_.pop_back();
- break;
-
- // Control flow operators
-
- case DW_OP_le:
- NEEDS(2)
- *StackSecond() = *SignedStackSecond() <= *SignedStackTop();
- stack_.pop_back();
- break;
-
- case DW_OP_ge:
- NEEDS(2)
- *StackSecond() = *SignedStackSecond() >= *SignedStackTop();
- stack_.pop_back();
- break;
-
- case DW_OP_eq:
- NEEDS(2)
- *StackSecond() = *SignedStackSecond() == *SignedStackTop();
- stack_.pop_back();
- break;
-
- case DW_OP_lt:
- NEEDS(2)
- *StackSecond() = *SignedStackSecond() < *SignedStackTop();
- stack_.pop_back();
- break;
-
- case DW_OP_gt:
- NEEDS(2)
- *StackSecond() = *SignedStackSecond() > *SignedStackTop();
- stack_.pop_back();
- break;
-
- case DW_OP_ne:
- NEEDS(2)
- *StackSecond() = *SignedStackSecond() != *SignedStackTop();
- stack_.pop_back();
- break;
-
- case DW_OP_skip:
- program += 2 + static_cast<int16>(reader->ReadTwoBytes(program));
- break;
-
- case DW_OP_bra: {
- NEEDS(1)
- if (*StackTop()) {
- program += static_cast<int16>(reader->ReadTwoBytes(program));
- }
- program += 2;
- stack_.pop_back();
- break;
- }
-
- // Special operations
-
- case DW_OP_piece:
- // The result at the top of the stack has a 'piece size' given
- // by the argument. We do not currently do anything with this number.
- size_t len;
- reader->ReadUnsignedLEB128(program, &len);
- program += len;
- break;
-
- case DW_OP_nop:
- break;
-
- default:
- Error("Unknown opcode");
- }
- }
-
- if (program != program_end) Error("Invalid program length");
- return *StackTop();
-}
-
-
-#undef NEEDS
-
-}
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