forked from OSchip/llvm-project
3199 lines
134 KiB
C++
3199 lines
134 KiB
C++
//===-- DWARFExpression.cpp -------------------------------------*- C++ -*-===//
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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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#include "lldb/Expression/DWARFExpression.h"
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#include <vector>
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#include "lldb/Core/DataEncoder.h"
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#include "lldb/Core/dwarf.h"
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#include "lldb/Core/Log.h"
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#include "lldb/Core/RegisterValue.h"
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#include "lldb/Core/StreamString.h"
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#include "lldb/Core/Scalar.h"
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#include "lldb/Core/Value.h"
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#include "lldb/Core/VMRange.h"
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#include "lldb/Expression/ClangExpressionDeclMap.h"
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#include "lldb/Expression/ClangExpressionVariable.h"
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#include "lldb/Host/Endian.h"
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#include "lldb/Host/Host.h"
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#include "lldb/lldb-private-log.h"
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#include "lldb/Symbol/ClangASTType.h"
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#include "lldb/Symbol/ClangASTContext.h"
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#include "lldb/Symbol/Type.h"
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#include "lldb/Target/ABI.h"
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#include "lldb/Target/ExecutionContext.h"
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#include "lldb/Target/Process.h"
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#include "lldb/Target/RegisterContext.h"
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#include "lldb/Target/StackFrame.h"
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using namespace lldb;
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using namespace lldb_private;
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const char *
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DW_OP_value_to_name (uint32_t val)
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{
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static char invalid[100];
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switch (val) {
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case 0x03: return "DW_OP_addr";
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case 0x06: return "DW_OP_deref";
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case 0x08: return "DW_OP_const1u";
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case 0x09: return "DW_OP_const1s";
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case 0x0a: return "DW_OP_const2u";
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case 0x0b: return "DW_OP_const2s";
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case 0x0c: return "DW_OP_const4u";
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case 0x0d: return "DW_OP_const4s";
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case 0x0e: return "DW_OP_const8u";
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case 0x0f: return "DW_OP_const8s";
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case 0x10: return "DW_OP_constu";
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case 0x11: return "DW_OP_consts";
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case 0x12: return "DW_OP_dup";
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case 0x13: return "DW_OP_drop";
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case 0x14: return "DW_OP_over";
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case 0x15: return "DW_OP_pick";
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case 0x16: return "DW_OP_swap";
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case 0x17: return "DW_OP_rot";
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case 0x18: return "DW_OP_xderef";
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case 0x19: return "DW_OP_abs";
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case 0x1a: return "DW_OP_and";
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case 0x1b: return "DW_OP_div";
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case 0x1c: return "DW_OP_minus";
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case 0x1d: return "DW_OP_mod";
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case 0x1e: return "DW_OP_mul";
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case 0x1f: return "DW_OP_neg";
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case 0x20: return "DW_OP_not";
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case 0x21: return "DW_OP_or";
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case 0x22: return "DW_OP_plus";
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case 0x23: return "DW_OP_plus_uconst";
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case 0x24: return "DW_OP_shl";
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case 0x25: return "DW_OP_shr";
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case 0x26: return "DW_OP_shra";
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case 0x27: return "DW_OP_xor";
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case 0x2f: return "DW_OP_skip";
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case 0x28: return "DW_OP_bra";
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case 0x29: return "DW_OP_eq";
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case 0x2a: return "DW_OP_ge";
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case 0x2b: return "DW_OP_gt";
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case 0x2c: return "DW_OP_le";
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case 0x2d: return "DW_OP_lt";
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case 0x2e: return "DW_OP_ne";
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case 0x30: return "DW_OP_lit0";
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case 0x31: return "DW_OP_lit1";
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case 0x32: return "DW_OP_lit2";
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case 0x33: return "DW_OP_lit3";
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case 0x34: return "DW_OP_lit4";
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case 0x35: return "DW_OP_lit5";
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case 0x36: return "DW_OP_lit6";
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case 0x37: return "DW_OP_lit7";
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case 0x38: return "DW_OP_lit8";
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case 0x39: return "DW_OP_lit9";
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case 0x3a: return "DW_OP_lit10";
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case 0x3b: return "DW_OP_lit11";
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case 0x3c: return "DW_OP_lit12";
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case 0x3d: return "DW_OP_lit13";
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case 0x3e: return "DW_OP_lit14";
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case 0x3f: return "DW_OP_lit15";
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case 0x40: return "DW_OP_lit16";
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case 0x41: return "DW_OP_lit17";
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case 0x42: return "DW_OP_lit18";
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case 0x43: return "DW_OP_lit19";
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case 0x44: return "DW_OP_lit20";
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case 0x45: return "DW_OP_lit21";
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case 0x46: return "DW_OP_lit22";
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case 0x47: return "DW_OP_lit23";
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case 0x48: return "DW_OP_lit24";
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case 0x49: return "DW_OP_lit25";
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case 0x4a: return "DW_OP_lit26";
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case 0x4b: return "DW_OP_lit27";
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case 0x4c: return "DW_OP_lit28";
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case 0x4d: return "DW_OP_lit29";
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case 0x4e: return "DW_OP_lit30";
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case 0x4f: return "DW_OP_lit31";
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case 0x50: return "DW_OP_reg0";
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case 0x51: return "DW_OP_reg1";
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case 0x52: return "DW_OP_reg2";
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case 0x53: return "DW_OP_reg3";
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case 0x54: return "DW_OP_reg4";
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case 0x55: return "DW_OP_reg5";
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case 0x56: return "DW_OP_reg6";
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case 0x57: return "DW_OP_reg7";
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case 0x58: return "DW_OP_reg8";
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case 0x59: return "DW_OP_reg9";
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case 0x5a: return "DW_OP_reg10";
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case 0x5b: return "DW_OP_reg11";
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case 0x5c: return "DW_OP_reg12";
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case 0x5d: return "DW_OP_reg13";
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case 0x5e: return "DW_OP_reg14";
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case 0x5f: return "DW_OP_reg15";
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case 0x60: return "DW_OP_reg16";
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case 0x61: return "DW_OP_reg17";
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case 0x62: return "DW_OP_reg18";
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case 0x63: return "DW_OP_reg19";
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case 0x64: return "DW_OP_reg20";
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case 0x65: return "DW_OP_reg21";
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case 0x66: return "DW_OP_reg22";
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case 0x67: return "DW_OP_reg23";
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case 0x68: return "DW_OP_reg24";
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case 0x69: return "DW_OP_reg25";
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case 0x6a: return "DW_OP_reg26";
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case 0x6b: return "DW_OP_reg27";
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case 0x6c: return "DW_OP_reg28";
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case 0x6d: return "DW_OP_reg29";
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case 0x6e: return "DW_OP_reg30";
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case 0x6f: return "DW_OP_reg31";
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case 0x70: return "DW_OP_breg0";
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case 0x71: return "DW_OP_breg1";
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case 0x72: return "DW_OP_breg2";
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case 0x73: return "DW_OP_breg3";
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case 0x74: return "DW_OP_breg4";
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case 0x75: return "DW_OP_breg5";
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case 0x76: return "DW_OP_breg6";
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case 0x77: return "DW_OP_breg7";
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case 0x78: return "DW_OP_breg8";
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case 0x79: return "DW_OP_breg9";
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case 0x7a: return "DW_OP_breg10";
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case 0x7b: return "DW_OP_breg11";
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case 0x7c: return "DW_OP_breg12";
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case 0x7d: return "DW_OP_breg13";
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case 0x7e: return "DW_OP_breg14";
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case 0x7f: return "DW_OP_breg15";
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case 0x80: return "DW_OP_breg16";
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case 0x81: return "DW_OP_breg17";
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case 0x82: return "DW_OP_breg18";
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case 0x83: return "DW_OP_breg19";
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case 0x84: return "DW_OP_breg20";
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case 0x85: return "DW_OP_breg21";
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case 0x86: return "DW_OP_breg22";
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case 0x87: return "DW_OP_breg23";
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case 0x88: return "DW_OP_breg24";
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case 0x89: return "DW_OP_breg25";
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case 0x8a: return "DW_OP_breg26";
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case 0x8b: return "DW_OP_breg27";
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case 0x8c: return "DW_OP_breg28";
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case 0x8d: return "DW_OP_breg29";
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case 0x8e: return "DW_OP_breg30";
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case 0x8f: return "DW_OP_breg31";
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case 0x90: return "DW_OP_regx";
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case 0x91: return "DW_OP_fbreg";
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case 0x92: return "DW_OP_bregx";
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case 0x93: return "DW_OP_piece";
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case 0x94: return "DW_OP_deref_size";
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case 0x95: return "DW_OP_xderef_size";
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case 0x96: return "DW_OP_nop";
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case 0x97: return "DW_OP_push_object_address";
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case 0x98: return "DW_OP_call2";
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case 0x99: return "DW_OP_call4";
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case 0x9a: return "DW_OP_call_ref";
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// case DW_OP_APPLE_array_ref: return "DW_OP_APPLE_array_ref";
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// case DW_OP_APPLE_extern: return "DW_OP_APPLE_extern";
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case DW_OP_APPLE_uninit: return "DW_OP_APPLE_uninit";
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// case DW_OP_APPLE_assign: return "DW_OP_APPLE_assign";
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// case DW_OP_APPLE_address_of: return "DW_OP_APPLE_address_of";
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// case DW_OP_APPLE_value_of: return "DW_OP_APPLE_value_of";
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// case DW_OP_APPLE_deref_type: return "DW_OP_APPLE_deref_type";
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// case DW_OP_APPLE_expr_local: return "DW_OP_APPLE_expr_local";
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// case DW_OP_APPLE_constf: return "DW_OP_APPLE_constf";
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// case DW_OP_APPLE_scalar_cast: return "DW_OP_APPLE_scalar_cast";
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// case DW_OP_APPLE_clang_cast: return "DW_OP_APPLE_clang_cast";
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// case DW_OP_APPLE_clear: return "DW_OP_APPLE_clear";
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// case DW_OP_APPLE_error: return "DW_OP_APPLE_error";
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default:
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snprintf (invalid, sizeof(invalid), "Unknown DW_OP constant: 0x%x", val);
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return invalid;
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}
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}
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//----------------------------------------------------------------------
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// DWARFExpression constructor
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//----------------------------------------------------------------------
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DWARFExpression::DWARFExpression() :
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m_data(),
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m_reg_kind (eRegisterKindDWARF),
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m_loclist_slide (LLDB_INVALID_ADDRESS)
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{
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}
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DWARFExpression::DWARFExpression(const DWARFExpression& rhs) :
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m_data(rhs.m_data),
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m_reg_kind (rhs.m_reg_kind),
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m_loclist_slide(rhs.m_loclist_slide)
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{
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}
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DWARFExpression::DWARFExpression(const DataExtractor& data, uint32_t data_offset, uint32_t data_length) :
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m_data(data, data_offset, data_length),
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m_reg_kind (eRegisterKindDWARF),
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m_loclist_slide(LLDB_INVALID_ADDRESS)
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{
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}
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//----------------------------------------------------------------------
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// Destructor
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//----------------------------------------------------------------------
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DWARFExpression::~DWARFExpression()
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{
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}
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bool
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DWARFExpression::IsValid() const
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{
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return m_data.GetByteSize() > 0;
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}
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void
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DWARFExpression::SetOpcodeData (const DataExtractor& data)
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{
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m_data = data;
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}
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void
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DWARFExpression::CopyOpcodeData (const DataExtractor& data, uint32_t data_offset, uint32_t data_length)
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{
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const uint8_t *bytes = data.PeekData(data_offset, data_length);
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if (bytes)
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{
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m_data.SetData(DataBufferSP(new DataBufferHeap(bytes, data_length)));
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m_data.SetByteOrder(data.GetByteOrder());
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m_data.SetAddressByteSize(data.GetAddressByteSize());
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}
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}
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void
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DWARFExpression::SetOpcodeData (const DataExtractor& data, uint32_t data_offset, uint32_t data_length)
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{
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m_data.SetData(data, data_offset, data_length);
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}
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void
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DWARFExpression::DumpLocation (Stream *s, uint32_t offset, uint32_t length, lldb::DescriptionLevel level, ABI *abi) const
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{
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if (!m_data.ValidOffsetForDataOfSize(offset, length))
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return;
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const uint32_t start_offset = offset;
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const uint32_t end_offset = offset + length;
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while (m_data.ValidOffset(offset) && offset < end_offset)
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{
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const uint32_t op_offset = offset;
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const uint8_t op = m_data.GetU8(&offset);
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switch (level)
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{
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default:
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break;
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case lldb::eDescriptionLevelBrief:
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if (offset > start_offset)
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s->PutChar(' ');
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break;
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case lldb::eDescriptionLevelFull:
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case lldb::eDescriptionLevelVerbose:
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if (offset > start_offset)
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s->EOL();
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s->Indent();
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if (level == lldb::eDescriptionLevelFull)
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break;
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// Fall through for verbose and print offset and DW_OP prefix..
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s->Printf("0x%8.8x: %s", op_offset, op >= DW_OP_APPLE_uninit ? "DW_OP_APPLE_" : "DW_OP_");
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break;
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}
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switch (op)
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{
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case DW_OP_addr: *s << "DW_OP_addr(" << m_data.GetAddress(&offset) << ") "; break; // 0x03 1 address
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case DW_OP_deref: *s << "DW_OP_deref"; break; // 0x06
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case DW_OP_const1u: s->Printf("DW_OP_const1u(0x%2.2x) ", m_data.GetU8(&offset)); break; // 0x08 1 1-byte constant
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case DW_OP_const1s: s->Printf("DW_OP_const1s(0x%2.2x) ", m_data.GetU8(&offset)); break; // 0x09 1 1-byte constant
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case DW_OP_const2u: s->Printf("DW_OP_const2u(0x%4.4x) ", m_data.GetU16(&offset)); break; // 0x0a 1 2-byte constant
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case DW_OP_const2s: s->Printf("DW_OP_const2s(0x%4.4x) ", m_data.GetU16(&offset)); break; // 0x0b 1 2-byte constant
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case DW_OP_const4u: s->Printf("DW_OP_const4u(0x%8.8x) ", m_data.GetU32(&offset)); break; // 0x0c 1 4-byte constant
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case DW_OP_const4s: s->Printf("DW_OP_const4s(0x%8.8x) ", m_data.GetU32(&offset)); break; // 0x0d 1 4-byte constant
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case DW_OP_const8u: s->Printf("DW_OP_const8u(0x%16.16llx) ", m_data.GetU64(&offset)); break; // 0x0e 1 8-byte constant
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case DW_OP_const8s: s->Printf("DW_OP_const8s(0x%16.16llx) ", m_data.GetU64(&offset)); break; // 0x0f 1 8-byte constant
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case DW_OP_constu: s->Printf("DW_OP_constu(0x%llx) ", m_data.GetULEB128(&offset)); break; // 0x10 1 ULEB128 constant
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case DW_OP_consts: s->Printf("DW_OP_consts(0x%lld) ", m_data.GetSLEB128(&offset)); break; // 0x11 1 SLEB128 constant
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case DW_OP_dup: s->PutCString("DW_OP_dup"); break; // 0x12
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case DW_OP_drop: s->PutCString("DW_OP_drop"); break; // 0x13
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case DW_OP_over: s->PutCString("DW_OP_over"); break; // 0x14
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case DW_OP_pick: s->Printf("DW_OP_pick(0x%2.2x) ", m_data.GetU8(&offset)); break; // 0x15 1 1-byte stack index
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case DW_OP_swap: s->PutCString("DW_OP_swap"); break; // 0x16
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case DW_OP_rot: s->PutCString("DW_OP_rot"); break; // 0x17
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case DW_OP_xderef: s->PutCString("DW_OP_xderef"); break; // 0x18
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case DW_OP_abs: s->PutCString("DW_OP_abs"); break; // 0x19
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case DW_OP_and: s->PutCString("DW_OP_and"); break; // 0x1a
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case DW_OP_div: s->PutCString("DW_OP_div"); break; // 0x1b
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case DW_OP_minus: s->PutCString("DW_OP_minus"); break; // 0x1c
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case DW_OP_mod: s->PutCString("DW_OP_mod"); break; // 0x1d
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case DW_OP_mul: s->PutCString("DW_OP_mul"); break; // 0x1e
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case DW_OP_neg: s->PutCString("DW_OP_neg"); break; // 0x1f
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case DW_OP_not: s->PutCString("DW_OP_not"); break; // 0x20
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case DW_OP_or: s->PutCString("DW_OP_or"); break; // 0x21
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case DW_OP_plus: s->PutCString("DW_OP_plus"); break; // 0x22
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case DW_OP_plus_uconst: // 0x23 1 ULEB128 addend
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s->Printf("DW_OP_plus_uconst(0x%llx) ", m_data.GetULEB128(&offset));
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break;
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case DW_OP_shl: s->PutCString("DW_OP_shl"); break; // 0x24
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case DW_OP_shr: s->PutCString("DW_OP_shr"); break; // 0x25
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case DW_OP_shra: s->PutCString("DW_OP_shra"); break; // 0x26
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case DW_OP_xor: s->PutCString("DW_OP_xor"); break; // 0x27
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case DW_OP_skip: s->Printf("DW_OP_skip(0x%4.4x)", m_data.GetU16(&offset)); break; // 0x2f 1 signed 2-byte constant
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case DW_OP_bra: s->Printf("DW_OP_bra(0x%4.4x)", m_data.GetU16(&offset)); break; // 0x28 1 signed 2-byte constant
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case DW_OP_eq: s->PutCString("DW_OP_eq"); break; // 0x29
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case DW_OP_ge: s->PutCString("DW_OP_ge"); break; // 0x2a
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case DW_OP_gt: s->PutCString("DW_OP_gt"); break; // 0x2b
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case DW_OP_le: s->PutCString("DW_OP_le"); break; // 0x2c
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case DW_OP_lt: s->PutCString("DW_OP_lt"); break; // 0x2d
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case DW_OP_ne: s->PutCString("DW_OP_ne"); break; // 0x2e
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case DW_OP_lit0: // 0x30
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case DW_OP_lit1: // 0x31
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case DW_OP_lit2: // 0x32
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case DW_OP_lit3: // 0x33
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case DW_OP_lit4: // 0x34
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case DW_OP_lit5: // 0x35
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case DW_OP_lit6: // 0x36
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case DW_OP_lit7: // 0x37
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case DW_OP_lit8: // 0x38
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case DW_OP_lit9: // 0x39
|
|
case DW_OP_lit10: // 0x3A
|
|
case DW_OP_lit11: // 0x3B
|
|
case DW_OP_lit12: // 0x3C
|
|
case DW_OP_lit13: // 0x3D
|
|
case DW_OP_lit14: // 0x3E
|
|
case DW_OP_lit15: // 0x3F
|
|
case DW_OP_lit16: // 0x40
|
|
case DW_OP_lit17: // 0x41
|
|
case DW_OP_lit18: // 0x42
|
|
case DW_OP_lit19: // 0x43
|
|
case DW_OP_lit20: // 0x44
|
|
case DW_OP_lit21: // 0x45
|
|
case DW_OP_lit22: // 0x46
|
|
case DW_OP_lit23: // 0x47
|
|
case DW_OP_lit24: // 0x48
|
|
case DW_OP_lit25: // 0x49
|
|
case DW_OP_lit26: // 0x4A
|
|
case DW_OP_lit27: // 0x4B
|
|
case DW_OP_lit28: // 0x4C
|
|
case DW_OP_lit29: // 0x4D
|
|
case DW_OP_lit30: // 0x4E
|
|
case DW_OP_lit31: s->Printf("DW_OP_lit%i", op - DW_OP_lit0); break; // 0x4f
|
|
|
|
case DW_OP_reg0: // 0x50
|
|
case DW_OP_reg1: // 0x51
|
|
case DW_OP_reg2: // 0x52
|
|
case DW_OP_reg3: // 0x53
|
|
case DW_OP_reg4: // 0x54
|
|
case DW_OP_reg5: // 0x55
|
|
case DW_OP_reg6: // 0x56
|
|
case DW_OP_reg7: // 0x57
|
|
case DW_OP_reg8: // 0x58
|
|
case DW_OP_reg9: // 0x59
|
|
case DW_OP_reg10: // 0x5A
|
|
case DW_OP_reg11: // 0x5B
|
|
case DW_OP_reg12: // 0x5C
|
|
case DW_OP_reg13: // 0x5D
|
|
case DW_OP_reg14: // 0x5E
|
|
case DW_OP_reg15: // 0x5F
|
|
case DW_OP_reg16: // 0x60
|
|
case DW_OP_reg17: // 0x61
|
|
case DW_OP_reg18: // 0x62
|
|
case DW_OP_reg19: // 0x63
|
|
case DW_OP_reg20: // 0x64
|
|
case DW_OP_reg21: // 0x65
|
|
case DW_OP_reg22: // 0x66
|
|
case DW_OP_reg23: // 0x67
|
|
case DW_OP_reg24: // 0x68
|
|
case DW_OP_reg25: // 0x69
|
|
case DW_OP_reg26: // 0x6A
|
|
case DW_OP_reg27: // 0x6B
|
|
case DW_OP_reg28: // 0x6C
|
|
case DW_OP_reg29: // 0x6D
|
|
case DW_OP_reg30: // 0x6E
|
|
case DW_OP_reg31: // 0x6F
|
|
{
|
|
uint32_t reg_num = op - DW_OP_reg0;
|
|
if (abi)
|
|
{
|
|
RegisterInfo reg_info;
|
|
if (abi->GetRegisterInfoByKind(m_reg_kind, reg_num, reg_info))
|
|
{
|
|
if (reg_info.name)
|
|
{
|
|
s->PutCString (reg_info.name);
|
|
break;
|
|
}
|
|
else if (reg_info.alt_name)
|
|
{
|
|
s->PutCString (reg_info.alt_name);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
s->Printf("DW_OP_reg%u", reg_num); break;
|
|
}
|
|
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:
|
|
{
|
|
uint32_t reg_num = op - DW_OP_breg0;
|
|
int64_t reg_offset = m_data.GetSLEB128(&offset);
|
|
if (abi)
|
|
{
|
|
RegisterInfo reg_info;
|
|
if (abi->GetRegisterInfoByKind(m_reg_kind, reg_num, reg_info))
|
|
{
|
|
if (reg_info.name)
|
|
{
|
|
s->Printf("[%s%+lli]", reg_info.name, reg_offset);
|
|
break;
|
|
}
|
|
else if (reg_info.alt_name)
|
|
{
|
|
s->Printf("[%s%+lli]", reg_info.alt_name, reg_offset);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
s->Printf("DW_OP_breg%i(0x%llx)", reg_num, reg_offset);
|
|
}
|
|
break;
|
|
|
|
case DW_OP_regx: // 0x90 1 ULEB128 register
|
|
{
|
|
uint64_t reg_num = m_data.GetULEB128(&offset);
|
|
if (abi)
|
|
{
|
|
RegisterInfo reg_info;
|
|
if (abi->GetRegisterInfoByKind(m_reg_kind, reg_num, reg_info))
|
|
{
|
|
if (reg_info.name)
|
|
{
|
|
s->PutCString (reg_info.name);
|
|
break;
|
|
}
|
|
else if (reg_info.alt_name)
|
|
{
|
|
s->PutCString (reg_info.alt_name);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
s->Printf("DW_OP_regx(%llu)", reg_num); break;
|
|
}
|
|
break;
|
|
case DW_OP_fbreg: // 0x91 1 SLEB128 offset
|
|
s->Printf("DW_OP_fbreg(%lli)",m_data.GetSLEB128(&offset));
|
|
break;
|
|
case DW_OP_bregx: // 0x92 2 ULEB128 register followed by SLEB128 offset
|
|
{
|
|
uint32_t reg_num = m_data.GetULEB128(&offset);
|
|
int64_t reg_offset = m_data.GetSLEB128(&offset);
|
|
if (abi)
|
|
{
|
|
RegisterInfo reg_info;
|
|
if (abi->GetRegisterInfoByKind(m_reg_kind, reg_num, reg_info))
|
|
{
|
|
if (reg_info.name)
|
|
{
|
|
s->Printf("[%s%+lli]", reg_info.name, reg_offset);
|
|
break;
|
|
}
|
|
else if (reg_info.alt_name)
|
|
{
|
|
s->Printf("[%s%+lli]", reg_info.alt_name, reg_offset);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
s->Printf("DW_OP_bregx(reg=%u,offset=%lli)", reg_num, reg_offset);
|
|
}
|
|
break;
|
|
case DW_OP_piece: // 0x93 1 ULEB128 size of piece addressed
|
|
s->Printf("DW_OP_piece(0x%llx)", m_data.GetULEB128(&offset));
|
|
break;
|
|
case DW_OP_deref_size: // 0x94 1 1-byte size of data retrieved
|
|
s->Printf("DW_OP_deref_size(0x%2.2x)", m_data.GetU8(&offset));
|
|
break;
|
|
case DW_OP_xderef_size: // 0x95 1 1-byte size of data retrieved
|
|
s->Printf("DW_OP_xderef_size(0x%2.2x)", m_data.GetU8(&offset));
|
|
break;
|
|
case DW_OP_nop: s->PutCString("DW_OP_nop"); break; // 0x96
|
|
case DW_OP_push_object_address: s->PutCString("DW_OP_push_object_address"); break; // 0x97 DWARF3
|
|
case DW_OP_call2: // 0x98 DWARF3 1 2-byte offset of DIE
|
|
s->Printf("DW_OP_call2(0x%4.4x)", m_data.GetU16(&offset));
|
|
break;
|
|
case DW_OP_call4: // 0x99 DWARF3 1 4-byte offset of DIE
|
|
s->Printf("DW_OP_call4(0x%8.8x)", m_data.GetU32(&offset));
|
|
break;
|
|
case DW_OP_call_ref: // 0x9a DWARF3 1 4- or 8-byte offset of DIE
|
|
s->Printf("DW_OP_call_ref(0x%8.8llx)", m_data.GetAddress(&offset));
|
|
break;
|
|
// case DW_OP_form_tls_address: s << "form_tls_address"; break; // 0x9b DWARF3
|
|
// case DW_OP_call_frame_cfa: s << "call_frame_cfa"; break; // 0x9c DWARF3
|
|
// case DW_OP_bit_piece: // 0x9d DWARF3 2
|
|
// s->Printf("DW_OP_bit_piece(0x%x, 0x%x)", m_data.GetULEB128(&offset), m_data.GetULEB128(&offset));
|
|
// break;
|
|
// case DW_OP_lo_user: s->PutCString("DW_OP_lo_user"); break; // 0xe0
|
|
// case DW_OP_hi_user: s->PutCString("DW_OP_hi_user"); break; // 0xff
|
|
// case DW_OP_APPLE_extern:
|
|
// s->Printf("DW_OP_APPLE_extern(%llu)", m_data.GetULEB128(&offset));
|
|
// break;
|
|
// case DW_OP_APPLE_array_ref:
|
|
// s->PutCString("DW_OP_APPLE_array_ref");
|
|
// break;
|
|
case DW_OP_APPLE_uninit:
|
|
s->PutCString("DW_OP_APPLE_uninit"); // 0xF0
|
|
break;
|
|
// case DW_OP_APPLE_assign: // 0xF1 - pops value off and assigns it to second item on stack (2nd item must have assignable context)
|
|
// s->PutCString("DW_OP_APPLE_assign");
|
|
// break;
|
|
// case DW_OP_APPLE_address_of: // 0xF2 - gets the address of the top stack item (top item must be a variable, or have value_type that is an address already)
|
|
// s->PutCString("DW_OP_APPLE_address_of");
|
|
// break;
|
|
// case DW_OP_APPLE_value_of: // 0xF3 - pops the value off the stack and pushes the value of that object (top item must be a variable, or expression local)
|
|
// s->PutCString("DW_OP_APPLE_value_of");
|
|
// break;
|
|
// case DW_OP_APPLE_deref_type: // 0xF4 - gets the address of the top stack item (top item must be a variable, or a clang type)
|
|
// s->PutCString("DW_OP_APPLE_deref_type");
|
|
// break;
|
|
// case DW_OP_APPLE_expr_local: // 0xF5 - ULEB128 expression local index
|
|
// s->Printf("DW_OP_APPLE_expr_local(%llu)", m_data.GetULEB128(&offset));
|
|
// break;
|
|
// case DW_OP_APPLE_constf: // 0xF6 - 1 byte float size, followed by constant float data
|
|
// {
|
|
// uint8_t float_length = m_data.GetU8(&offset);
|
|
// s->Printf("DW_OP_APPLE_constf(<%u> ", float_length);
|
|
// m_data.Dump(s, offset, eFormatHex, float_length, 1, UINT32_MAX, DW_INVALID_ADDRESS, 0, 0);
|
|
// s->PutChar(')');
|
|
// // Consume the float data
|
|
// m_data.GetData(&offset, float_length);
|
|
// }
|
|
// break;
|
|
// case DW_OP_APPLE_scalar_cast:
|
|
// s->Printf("DW_OP_APPLE_scalar_cast(%s)", Scalar::GetValueTypeAsCString ((Scalar::Type)m_data.GetU8(&offset)));
|
|
// break;
|
|
// case DW_OP_APPLE_clang_cast:
|
|
// {
|
|
// clang::Type *clang_type = (clang::Type *)m_data.GetMaxU64(&offset, sizeof(void*));
|
|
// s->Printf("DW_OP_APPLE_clang_cast(%p)", clang_type);
|
|
// }
|
|
// break;
|
|
// case DW_OP_APPLE_clear:
|
|
// s->PutCString("DW_OP_APPLE_clear");
|
|
// break;
|
|
// case DW_OP_APPLE_error: // 0xFF - Stops expression evaluation and returns an error (no args)
|
|
// s->PutCString("DW_OP_APPLE_error");
|
|
// break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
DWARFExpression::SetLocationListSlide (addr_t slide)
|
|
{
|
|
m_loclist_slide = slide;
|
|
}
|
|
|
|
int
|
|
DWARFExpression::GetRegisterKind ()
|
|
{
|
|
return m_reg_kind;
|
|
}
|
|
|
|
void
|
|
DWARFExpression::SetRegisterKind (RegisterKind reg_kind)
|
|
{
|
|
m_reg_kind = reg_kind;
|
|
}
|
|
|
|
bool
|
|
DWARFExpression::IsLocationList() const
|
|
{
|
|
return m_loclist_slide != LLDB_INVALID_ADDRESS;
|
|
}
|
|
|
|
void
|
|
DWARFExpression::GetDescription (Stream *s, lldb::DescriptionLevel level, addr_t location_list_base_addr, ABI *abi) const
|
|
{
|
|
if (IsLocationList())
|
|
{
|
|
// We have a location list
|
|
uint32_t offset = 0;
|
|
uint32_t count = 0;
|
|
addr_t curr_base_addr = location_list_base_addr;
|
|
while (m_data.ValidOffset(offset))
|
|
{
|
|
lldb::addr_t begin_addr_offset = m_data.GetAddress(&offset);
|
|
lldb::addr_t end_addr_offset = m_data.GetAddress(&offset);
|
|
if (begin_addr_offset < end_addr_offset)
|
|
{
|
|
if (count > 0)
|
|
s->PutCString(", ");
|
|
VMRange addr_range(curr_base_addr + begin_addr_offset, curr_base_addr + end_addr_offset);
|
|
addr_range.Dump(s, 0, 8);
|
|
s->PutChar('{');
|
|
uint32_t location_length = m_data.GetU16(&offset);
|
|
DumpLocation (s, offset, location_length, level, abi);
|
|
s->PutChar('}');
|
|
offset += location_length;
|
|
}
|
|
else if (begin_addr_offset == 0 && end_addr_offset == 0)
|
|
{
|
|
// The end of the location list is marked by both the start and end offset being zero
|
|
break;
|
|
}
|
|
else
|
|
{
|
|
if ((m_data.GetAddressByteSize() == 4 && (begin_addr_offset == UINT32_MAX)) ||
|
|
(m_data.GetAddressByteSize() == 8 && (begin_addr_offset == UINT64_MAX)))
|
|
{
|
|
curr_base_addr = end_addr_offset + location_list_base_addr;
|
|
// We have a new base address
|
|
if (count > 0)
|
|
s->PutCString(", ");
|
|
*s << "base_addr = " << end_addr_offset;
|
|
}
|
|
}
|
|
|
|
count++;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// We have a normal location that contains DW_OP location opcodes
|
|
DumpLocation (s, 0, m_data.GetByteSize(), level, abi);
|
|
}
|
|
}
|
|
|
|
static bool
|
|
ReadRegisterValueAsScalar
|
|
(
|
|
RegisterContext *reg_ctx,
|
|
uint32_t reg_kind,
|
|
uint32_t reg_num,
|
|
Error *error_ptr,
|
|
Value &value
|
|
)
|
|
{
|
|
if (reg_ctx == NULL)
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorStringWithFormat("No register context in frame.\n");
|
|
}
|
|
else
|
|
{
|
|
uint32_t native_reg = reg_ctx->ConvertRegisterKindToRegisterNumber(reg_kind, reg_num);
|
|
if (native_reg == LLDB_INVALID_REGNUM)
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorStringWithFormat("Unable to convert register kind=%u reg_num=%u to a native register number.\n", reg_kind, reg_num);
|
|
}
|
|
else
|
|
{
|
|
const RegisterInfo *reg_info = reg_ctx->GetRegisterInfoAtIndex(native_reg);
|
|
RegisterValue reg_value;
|
|
if (reg_ctx->ReadRegister (reg_info, reg_value))
|
|
{
|
|
if (reg_value.GetScalarValue(value.GetScalar()))
|
|
{
|
|
value.SetValueType (Value::eValueTypeScalar);
|
|
value.SetContext (Value::eContextTypeRegisterInfo,
|
|
const_cast<RegisterInfo *>(reg_info));
|
|
if (error_ptr)
|
|
error_ptr->Clear();
|
|
return true;
|
|
}
|
|
else
|
|
{
|
|
// If we get this error, then we need to implement a value
|
|
// buffer in the dwarf expression evaluation function...
|
|
if (error_ptr)
|
|
error_ptr->SetErrorStringWithFormat ("register %s can't be converted to a scalar value",
|
|
reg_info->name);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorStringWithFormat("register %s is not available", reg_info->name);
|
|
}
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
//bool
|
|
//DWARFExpression::LocationListContainsLoadAddress (Process* process, const Address &addr) const
|
|
//{
|
|
// return LocationListContainsLoadAddress(process, addr.GetLoadAddress(process));
|
|
//}
|
|
//
|
|
//bool
|
|
//DWARFExpression::LocationListContainsLoadAddress (Process* process, addr_t load_addr) const
|
|
//{
|
|
// if (load_addr == LLDB_INVALID_ADDRESS)
|
|
// return false;
|
|
//
|
|
// if (IsLocationList())
|
|
// {
|
|
// uint32_t offset = 0;
|
|
//
|
|
// addr_t loc_list_base_addr = m_loclist_slide.GetLoadAddress(process);
|
|
//
|
|
// if (loc_list_base_addr == LLDB_INVALID_ADDRESS)
|
|
// return false;
|
|
//
|
|
// while (m_data.ValidOffset(offset))
|
|
// {
|
|
// // We need to figure out what the value is for the location.
|
|
// addr_t lo_pc = m_data.GetAddress(&offset);
|
|
// addr_t hi_pc = m_data.GetAddress(&offset);
|
|
// if (lo_pc == 0 && hi_pc == 0)
|
|
// break;
|
|
// else
|
|
// {
|
|
// lo_pc += loc_list_base_addr;
|
|
// hi_pc += loc_list_base_addr;
|
|
//
|
|
// if (lo_pc <= load_addr && load_addr < hi_pc)
|
|
// return true;
|
|
//
|
|
// offset += m_data.GetU16(&offset);
|
|
// }
|
|
// }
|
|
// }
|
|
// return false;
|
|
//}
|
|
|
|
static uint32_t
|
|
GetOpcodeDataSize (const DataExtractor &data, const uint32_t data_offset, const uint8_t op)
|
|
{
|
|
uint32_t offset = data_offset;
|
|
switch (op)
|
|
{
|
|
case DW_OP_addr:
|
|
case DW_OP_call_ref: // 0x9a 1 address sized offset of DIE (DWARF3)
|
|
return data.GetAddressByteSize();
|
|
|
|
// Opcodes with no arguments
|
|
case DW_OP_deref: // 0x06
|
|
case DW_OP_dup: // 0x12
|
|
case DW_OP_drop: // 0x13
|
|
case DW_OP_over: // 0x14
|
|
case DW_OP_swap: // 0x16
|
|
case DW_OP_rot: // 0x17
|
|
case DW_OP_xderef: // 0x18
|
|
case DW_OP_abs: // 0x19
|
|
case DW_OP_and: // 0x1a
|
|
case DW_OP_div: // 0x1b
|
|
case DW_OP_minus: // 0x1c
|
|
case DW_OP_mod: // 0x1d
|
|
case DW_OP_mul: // 0x1e
|
|
case DW_OP_neg: // 0x1f
|
|
case DW_OP_not: // 0x20
|
|
case DW_OP_or: // 0x21
|
|
case DW_OP_plus: // 0x22
|
|
case DW_OP_shl: // 0x24
|
|
case DW_OP_shr: // 0x25
|
|
case DW_OP_shra: // 0x26
|
|
case DW_OP_xor: // 0x27
|
|
case DW_OP_eq: // 0x29
|
|
case DW_OP_ge: // 0x2a
|
|
case DW_OP_gt: // 0x2b
|
|
case DW_OP_le: // 0x2c
|
|
case DW_OP_lt: // 0x2d
|
|
case DW_OP_ne: // 0x2e
|
|
case DW_OP_lit0: // 0x30
|
|
case DW_OP_lit1: // 0x31
|
|
case DW_OP_lit2: // 0x32
|
|
case DW_OP_lit3: // 0x33
|
|
case DW_OP_lit4: // 0x34
|
|
case DW_OP_lit5: // 0x35
|
|
case DW_OP_lit6: // 0x36
|
|
case DW_OP_lit7: // 0x37
|
|
case DW_OP_lit8: // 0x38
|
|
case DW_OP_lit9: // 0x39
|
|
case DW_OP_lit10: // 0x3A
|
|
case DW_OP_lit11: // 0x3B
|
|
case DW_OP_lit12: // 0x3C
|
|
case DW_OP_lit13: // 0x3D
|
|
case DW_OP_lit14: // 0x3E
|
|
case DW_OP_lit15: // 0x3F
|
|
case DW_OP_lit16: // 0x40
|
|
case DW_OP_lit17: // 0x41
|
|
case DW_OP_lit18: // 0x42
|
|
case DW_OP_lit19: // 0x43
|
|
case DW_OP_lit20: // 0x44
|
|
case DW_OP_lit21: // 0x45
|
|
case DW_OP_lit22: // 0x46
|
|
case DW_OP_lit23: // 0x47
|
|
case DW_OP_lit24: // 0x48
|
|
case DW_OP_lit25: // 0x49
|
|
case DW_OP_lit26: // 0x4A
|
|
case DW_OP_lit27: // 0x4B
|
|
case DW_OP_lit28: // 0x4C
|
|
case DW_OP_lit29: // 0x4D
|
|
case DW_OP_lit30: // 0x4E
|
|
case DW_OP_lit31: // 0x4f
|
|
case DW_OP_reg0: // 0x50
|
|
case DW_OP_reg1: // 0x51
|
|
case DW_OP_reg2: // 0x52
|
|
case DW_OP_reg3: // 0x53
|
|
case DW_OP_reg4: // 0x54
|
|
case DW_OP_reg5: // 0x55
|
|
case DW_OP_reg6: // 0x56
|
|
case DW_OP_reg7: // 0x57
|
|
case DW_OP_reg8: // 0x58
|
|
case DW_OP_reg9: // 0x59
|
|
case DW_OP_reg10: // 0x5A
|
|
case DW_OP_reg11: // 0x5B
|
|
case DW_OP_reg12: // 0x5C
|
|
case DW_OP_reg13: // 0x5D
|
|
case DW_OP_reg14: // 0x5E
|
|
case DW_OP_reg15: // 0x5F
|
|
case DW_OP_reg16: // 0x60
|
|
case DW_OP_reg17: // 0x61
|
|
case DW_OP_reg18: // 0x62
|
|
case DW_OP_reg19: // 0x63
|
|
case DW_OP_reg20: // 0x64
|
|
case DW_OP_reg21: // 0x65
|
|
case DW_OP_reg22: // 0x66
|
|
case DW_OP_reg23: // 0x67
|
|
case DW_OP_reg24: // 0x68
|
|
case DW_OP_reg25: // 0x69
|
|
case DW_OP_reg26: // 0x6A
|
|
case DW_OP_reg27: // 0x6B
|
|
case DW_OP_reg28: // 0x6C
|
|
case DW_OP_reg29: // 0x6D
|
|
case DW_OP_reg30: // 0x6E
|
|
case DW_OP_reg31: // 0x6F
|
|
case DW_OP_nop: // 0x96
|
|
case DW_OP_push_object_address: // 0x97 DWARF3
|
|
case DW_OP_form_tls_address: // 0x9b DWARF3
|
|
case DW_OP_call_frame_cfa: // 0x9c DWARF3
|
|
case DW_OP_stack_value: // 0x9f DWARF4
|
|
return 0;
|
|
|
|
// Opcodes with a single 1 byte arguments
|
|
case DW_OP_const1u: // 0x08 1 1-byte constant
|
|
case DW_OP_const1s: // 0x09 1 1-byte constant
|
|
case DW_OP_pick: // 0x15 1 1-byte stack index
|
|
case DW_OP_deref_size: // 0x94 1 1-byte size of data retrieved
|
|
case DW_OP_xderef_size: // 0x95 1 1-byte size of data retrieved
|
|
return 1;
|
|
|
|
// Opcodes with a single 2 byte arguments
|
|
case DW_OP_const2u: // 0x0a 1 2-byte constant
|
|
case DW_OP_const2s: // 0x0b 1 2-byte constant
|
|
case DW_OP_skip: // 0x2f 1 signed 2-byte constant
|
|
case DW_OP_bra: // 0x28 1 signed 2-byte constant
|
|
case DW_OP_call2: // 0x98 1 2-byte offset of DIE (DWARF3)
|
|
return 2;
|
|
|
|
// Opcodes with a single 4 byte arguments
|
|
case DW_OP_const4u: // 0x0c 1 4-byte constant
|
|
case DW_OP_const4s: // 0x0d 1 4-byte constant
|
|
case DW_OP_call4: // 0x99 1 4-byte offset of DIE (DWARF3)
|
|
return 4;
|
|
|
|
// Opcodes with a single 8 byte arguments
|
|
case DW_OP_const8u: // 0x0e 1 8-byte constant
|
|
case DW_OP_const8s: // 0x0f 1 8-byte constant
|
|
return 8;
|
|
|
|
// All opcodes that have a single ULEB (signed or unsigned) argument
|
|
case DW_OP_constu: // 0x10 1 ULEB128 constant
|
|
case DW_OP_consts: // 0x11 1 SLEB128 constant
|
|
case DW_OP_plus_uconst: // 0x23 1 ULEB128 addend
|
|
case DW_OP_breg0: // 0x70 1 ULEB128 register
|
|
case DW_OP_breg1: // 0x71 1 ULEB128 register
|
|
case DW_OP_breg2: // 0x72 1 ULEB128 register
|
|
case DW_OP_breg3: // 0x73 1 ULEB128 register
|
|
case DW_OP_breg4: // 0x74 1 ULEB128 register
|
|
case DW_OP_breg5: // 0x75 1 ULEB128 register
|
|
case DW_OP_breg6: // 0x76 1 ULEB128 register
|
|
case DW_OP_breg7: // 0x77 1 ULEB128 register
|
|
case DW_OP_breg8: // 0x78 1 ULEB128 register
|
|
case DW_OP_breg9: // 0x79 1 ULEB128 register
|
|
case DW_OP_breg10: // 0x7a 1 ULEB128 register
|
|
case DW_OP_breg11: // 0x7b 1 ULEB128 register
|
|
case DW_OP_breg12: // 0x7c 1 ULEB128 register
|
|
case DW_OP_breg13: // 0x7d 1 ULEB128 register
|
|
case DW_OP_breg14: // 0x7e 1 ULEB128 register
|
|
case DW_OP_breg15: // 0x7f 1 ULEB128 register
|
|
case DW_OP_breg16: // 0x80 1 ULEB128 register
|
|
case DW_OP_breg17: // 0x81 1 ULEB128 register
|
|
case DW_OP_breg18: // 0x82 1 ULEB128 register
|
|
case DW_OP_breg19: // 0x83 1 ULEB128 register
|
|
case DW_OP_breg20: // 0x84 1 ULEB128 register
|
|
case DW_OP_breg21: // 0x85 1 ULEB128 register
|
|
case DW_OP_breg22: // 0x86 1 ULEB128 register
|
|
case DW_OP_breg23: // 0x87 1 ULEB128 register
|
|
case DW_OP_breg24: // 0x88 1 ULEB128 register
|
|
case DW_OP_breg25: // 0x89 1 ULEB128 register
|
|
case DW_OP_breg26: // 0x8a 1 ULEB128 register
|
|
case DW_OP_breg27: // 0x8b 1 ULEB128 register
|
|
case DW_OP_breg28: // 0x8c 1 ULEB128 register
|
|
case DW_OP_breg29: // 0x8d 1 ULEB128 register
|
|
case DW_OP_breg30: // 0x8e 1 ULEB128 register
|
|
case DW_OP_breg31: // 0x8f 1 ULEB128 register
|
|
case DW_OP_regx: // 0x90 1 ULEB128 register
|
|
case DW_OP_fbreg: // 0x91 1 SLEB128 offset
|
|
case DW_OP_piece: // 0x93 1 ULEB128 size of piece addressed
|
|
data.Skip_LEB128(&offset);
|
|
return offset - data_offset;
|
|
|
|
// All opcodes that have a 2 ULEB (signed or unsigned) arguments
|
|
case DW_OP_bregx: // 0x92 2 ULEB128 register followed by SLEB128 offset
|
|
case DW_OP_bit_piece: // 0x9d ULEB128 bit size, ULEB128 bit offset (DWARF3);
|
|
data.Skip_LEB128(&offset);
|
|
data.Skip_LEB128(&offset);
|
|
return offset - data_offset;
|
|
|
|
case DW_OP_implicit_value: // 0x9e ULEB128 size followed by block of that size (DWARF4)
|
|
{
|
|
uint64_t block_len = data.Skip_LEB128(&offset);
|
|
offset += block_len;
|
|
return offset - data_offset;
|
|
}
|
|
|
|
default:
|
|
break;
|
|
}
|
|
return UINT32_MAX;
|
|
}
|
|
|
|
bool
|
|
DWARFExpression::LocationContains_DW_OP_addr (lldb::addr_t file_addr, bool &error) const
|
|
{
|
|
error = false;
|
|
if (IsLocationList())
|
|
return false;
|
|
uint32_t offset = 0;
|
|
while (m_data.ValidOffset(offset))
|
|
{
|
|
const uint8_t op = m_data.GetU8(&offset);
|
|
|
|
if (op == DW_OP_addr)
|
|
{
|
|
if (file_addr == LLDB_INVALID_ADDRESS)
|
|
return true;
|
|
addr_t op_file_addr = m_data.GetAddress(&offset);
|
|
if (op_file_addr == file_addr)
|
|
return true;
|
|
}
|
|
else
|
|
{
|
|
const uint32_t op_arg_size = GetOpcodeDataSize (m_data, offset, op);
|
|
if (op_arg_size == UINT32_MAX)
|
|
{
|
|
error = true;
|
|
break;
|
|
}
|
|
offset += op_arg_size;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
DWARFExpression::Update_DW_OP_addr (lldb::addr_t file_addr)
|
|
{
|
|
if (IsLocationList())
|
|
return false;
|
|
uint32_t offset = 0;
|
|
while (m_data.ValidOffset(offset))
|
|
{
|
|
const uint8_t op = m_data.GetU8(&offset);
|
|
|
|
if (op == DW_OP_addr)
|
|
{
|
|
const uint8_t addr_byte_size = m_data.GetAddressByteSize();
|
|
// We have to make a copy of the data as we don't know if this
|
|
// data is from a read only memory mapped buffer, so we duplicate
|
|
// all of the data first, then modify it, and if all goes well,
|
|
// we then replace the data for this expression
|
|
|
|
// So first we copy the data into a heap buffer
|
|
std::auto_ptr<DataBufferHeap> head_data_ap (new DataBufferHeap (m_data.GetDataStart(),
|
|
m_data.GetByteSize()));
|
|
|
|
// Make en encoder so we can write the address into the buffer using
|
|
// the correct byte order (endianness)
|
|
DataEncoder encoder (head_data_ap->GetBytes(),
|
|
head_data_ap->GetByteSize(),
|
|
m_data.GetByteOrder(),
|
|
addr_byte_size);
|
|
|
|
// Replace the address in the new buffer
|
|
if (encoder.PutMaxU64 (offset, addr_byte_size, file_addr) == UINT32_MAX)
|
|
return false;
|
|
|
|
// All went well, so now we can reset the data using a shared
|
|
// pointer to the heap data so "m_data" will now correctly
|
|
// manage the heap data.
|
|
m_data.SetData (DataBufferSP (head_data_ap.release()));
|
|
return true;
|
|
}
|
|
else
|
|
{
|
|
const uint32_t op_arg_size = GetOpcodeDataSize (m_data, offset, op);
|
|
if (op_arg_size == UINT32_MAX)
|
|
break;
|
|
offset += op_arg_size;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
DWARFExpression::LocationListContainsAddress (lldb::addr_t loclist_base_addr, lldb::addr_t addr) const
|
|
{
|
|
if (addr == LLDB_INVALID_ADDRESS)
|
|
return false;
|
|
|
|
if (IsLocationList())
|
|
{
|
|
uint32_t offset = 0;
|
|
|
|
if (loclist_base_addr == LLDB_INVALID_ADDRESS)
|
|
return false;
|
|
|
|
while (m_data.ValidOffset(offset))
|
|
{
|
|
// We need to figure out what the value is for the location.
|
|
addr_t lo_pc = m_data.GetAddress(&offset);
|
|
addr_t hi_pc = m_data.GetAddress(&offset);
|
|
if (lo_pc == 0 && hi_pc == 0)
|
|
break;
|
|
else
|
|
{
|
|
lo_pc += loclist_base_addr - m_loclist_slide;
|
|
hi_pc += loclist_base_addr - m_loclist_slide;
|
|
|
|
if (lo_pc <= addr && addr < hi_pc)
|
|
return true;
|
|
|
|
offset += m_data.GetU16(&offset);
|
|
}
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
DWARFExpression::GetLocation (addr_t base_addr, addr_t pc, uint32_t &offset, uint32_t &length)
|
|
{
|
|
offset = 0;
|
|
if (!IsLocationList())
|
|
{
|
|
length = m_data.GetByteSize();
|
|
return true;
|
|
}
|
|
|
|
if (base_addr != LLDB_INVALID_ADDRESS && pc != LLDB_INVALID_ADDRESS)
|
|
{
|
|
addr_t curr_base_addr = base_addr;
|
|
|
|
while (m_data.ValidOffset(offset))
|
|
{
|
|
// We need to figure out what the value is for the location.
|
|
addr_t lo_pc = m_data.GetAddress(&offset);
|
|
addr_t hi_pc = m_data.GetAddress(&offset);
|
|
if (lo_pc == 0 && hi_pc == 0)
|
|
{
|
|
break;
|
|
}
|
|
else
|
|
{
|
|
lo_pc += curr_base_addr - m_loclist_slide;
|
|
hi_pc += curr_base_addr - m_loclist_slide;
|
|
|
|
length = m_data.GetU16(&offset);
|
|
|
|
if (length > 0 && lo_pc <= pc && pc < hi_pc)
|
|
return true;
|
|
|
|
offset += length;
|
|
}
|
|
}
|
|
}
|
|
offset = UINT32_MAX;
|
|
length = 0;
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
DWARFExpression::DumpLocationForAddress (Stream *s,
|
|
lldb::DescriptionLevel level,
|
|
addr_t base_addr,
|
|
addr_t address,
|
|
ABI *abi)
|
|
{
|
|
uint32_t offset = 0;
|
|
uint32_t length = 0;
|
|
|
|
if (GetLocation (base_addr, address, offset, length))
|
|
{
|
|
if (length > 0)
|
|
{
|
|
DumpLocation(s, offset, length, level, abi);
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
DWARFExpression::Evaluate
|
|
(
|
|
ExecutionContextScope *exe_scope,
|
|
clang::ASTContext *ast_context,
|
|
ClangExpressionVariableList *expr_locals,
|
|
ClangExpressionDeclMap *decl_map,
|
|
lldb::addr_t loclist_base_load_addr,
|
|
const Value* initial_value_ptr,
|
|
Value& result,
|
|
Error *error_ptr
|
|
) const
|
|
{
|
|
ExecutionContext exe_ctx (exe_scope);
|
|
return Evaluate(&exe_ctx, ast_context, expr_locals, decl_map, NULL, loclist_base_load_addr, initial_value_ptr, result, error_ptr);
|
|
}
|
|
|
|
bool
|
|
DWARFExpression::Evaluate
|
|
(
|
|
ExecutionContext *exe_ctx,
|
|
clang::ASTContext *ast_context,
|
|
ClangExpressionVariableList *expr_locals,
|
|
ClangExpressionDeclMap *decl_map,
|
|
RegisterContext *reg_ctx,
|
|
lldb::addr_t loclist_base_load_addr,
|
|
const Value* initial_value_ptr,
|
|
Value& result,
|
|
Error *error_ptr
|
|
) const
|
|
{
|
|
if (IsLocationList())
|
|
{
|
|
uint32_t offset = 0;
|
|
addr_t pc;
|
|
StackFrame *frame = NULL;
|
|
if (reg_ctx)
|
|
pc = reg_ctx->GetPC();
|
|
else
|
|
{
|
|
frame = exe_ctx->GetFramePtr();
|
|
if (!frame)
|
|
return false;
|
|
RegisterContextSP reg_ctx_sp = frame->GetRegisterContext();
|
|
if (!reg_ctx_sp)
|
|
return false;
|
|
pc = reg_ctx_sp->GetPC();
|
|
}
|
|
|
|
if (loclist_base_load_addr != LLDB_INVALID_ADDRESS)
|
|
{
|
|
if (pc == LLDB_INVALID_ADDRESS)
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("Invalid PC in frame.");
|
|
return false;
|
|
}
|
|
|
|
addr_t curr_loclist_base_load_addr = loclist_base_load_addr;
|
|
|
|
while (m_data.ValidOffset(offset))
|
|
{
|
|
// We need to figure out what the value is for the location.
|
|
addr_t lo_pc = m_data.GetAddress(&offset);
|
|
addr_t hi_pc = m_data.GetAddress(&offset);
|
|
if (lo_pc == 0 && hi_pc == 0)
|
|
{
|
|
break;
|
|
}
|
|
else
|
|
{
|
|
lo_pc += curr_loclist_base_load_addr - m_loclist_slide;
|
|
hi_pc += curr_loclist_base_load_addr - m_loclist_slide;
|
|
|
|
uint16_t length = m_data.GetU16(&offset);
|
|
|
|
if (length > 0 && lo_pc <= pc && pc < hi_pc)
|
|
{
|
|
return DWARFExpression::Evaluate (exe_ctx, ast_context, expr_locals, decl_map, reg_ctx, m_data, offset, length, m_reg_kind, initial_value_ptr, result, error_ptr);
|
|
}
|
|
offset += length;
|
|
}
|
|
}
|
|
}
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString ("variable not available");
|
|
return false;
|
|
}
|
|
|
|
// Not a location list, just a single expression.
|
|
return DWARFExpression::Evaluate (exe_ctx, ast_context, expr_locals, decl_map, reg_ctx, m_data, 0, m_data.GetByteSize(), m_reg_kind, initial_value_ptr, result, error_ptr);
|
|
}
|
|
|
|
|
|
|
|
bool
|
|
DWARFExpression::Evaluate
|
|
(
|
|
ExecutionContext *exe_ctx,
|
|
clang::ASTContext *ast_context,
|
|
ClangExpressionVariableList *expr_locals,
|
|
ClangExpressionDeclMap *decl_map,
|
|
RegisterContext *reg_ctx,
|
|
const DataExtractor& opcodes,
|
|
const uint32_t opcodes_offset,
|
|
const uint32_t opcodes_length,
|
|
const uint32_t reg_kind,
|
|
const Value* initial_value_ptr,
|
|
Value& result,
|
|
Error *error_ptr
|
|
)
|
|
{
|
|
std::vector<Value> stack;
|
|
|
|
Process *process = NULL;
|
|
StackFrame *frame = NULL;
|
|
|
|
if (exe_ctx)
|
|
{
|
|
process = exe_ctx->GetProcessPtr();
|
|
frame = exe_ctx->GetFramePtr();
|
|
}
|
|
if (reg_ctx == NULL && frame)
|
|
reg_ctx = frame->GetRegisterContext().get();
|
|
|
|
if (initial_value_ptr)
|
|
stack.push_back(*initial_value_ptr);
|
|
|
|
uint32_t offset = opcodes_offset;
|
|
const uint32_t end_offset = opcodes_offset + opcodes_length;
|
|
Value tmp;
|
|
uint32_t reg_num;
|
|
|
|
// Make sure all of the data is available in opcodes.
|
|
if (!opcodes.ValidOffsetForDataOfSize(opcodes_offset, opcodes_length))
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString ("Invalid offset and/or length for opcodes buffer.");
|
|
return false;
|
|
}
|
|
LogSP log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
|
|
|
|
|
|
while (opcodes.ValidOffset(offset) && offset < end_offset)
|
|
{
|
|
const uint32_t op_offset = offset;
|
|
const uint8_t op = opcodes.GetU8(&offset);
|
|
|
|
if (log && log->GetVerbose())
|
|
{
|
|
size_t count = stack.size();
|
|
log->Printf("Stack before operation has %lu values:", count);
|
|
for (size_t i=0; i<count; ++i)
|
|
{
|
|
StreamString new_value;
|
|
new_value.Printf("[%zu]", i);
|
|
stack[i].Dump(&new_value);
|
|
log->Printf(" %s", new_value.GetData());
|
|
}
|
|
log->Printf("0x%8.8x: %s", op_offset, DW_OP_value_to_name(op));
|
|
}
|
|
switch (op)
|
|
{
|
|
//----------------------------------------------------------------------
|
|
// The DW_OP_addr operation has a single operand that encodes a machine
|
|
// address and whose size is the size of an address on the target machine.
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_addr:
|
|
stack.push_back(Scalar(opcodes.GetAddress(&offset)));
|
|
stack.back().SetValueType (Value::eValueTypeFileAddress);
|
|
break;
|
|
|
|
//----------------------------------------------------------------------
|
|
// The DW_OP_addr_sect_offset4 is used for any location expressions in
|
|
// shared libraries that have a location like:
|
|
// DW_OP_addr(0x1000)
|
|
// If this address resides in a shared library, then this virtual
|
|
// address won't make sense when it is evaluated in the context of a
|
|
// running process where shared libraries have been slid. To account for
|
|
// this, this new address type where we can store the section pointer
|
|
// and a 4 byte offset.
|
|
//----------------------------------------------------------------------
|
|
// case DW_OP_addr_sect_offset4:
|
|
// {
|
|
// result_type = eResultTypeFileAddress;
|
|
// lldb::Section *sect = (lldb::Section *)opcodes.GetMaxU64(&offset, sizeof(void *));
|
|
// lldb::addr_t sect_offset = opcodes.GetU32(&offset);
|
|
//
|
|
// Address so_addr (sect, sect_offset);
|
|
// lldb::addr_t load_addr = so_addr.GetLoadAddress();
|
|
// if (load_addr != LLDB_INVALID_ADDRESS)
|
|
// {
|
|
// // We successfully resolve a file address to a load
|
|
// // address.
|
|
// stack.push_back(load_addr);
|
|
// break;
|
|
// }
|
|
// else
|
|
// {
|
|
// // We were able
|
|
// if (error_ptr)
|
|
// error_ptr->SetErrorStringWithFormat ("Section %s in %s is not currently loaded.\n", sect->GetName().AsCString(), sect->GetModule()->GetFileSpec().GetFilename().AsCString());
|
|
// return false;
|
|
// }
|
|
// }
|
|
// break;
|
|
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_deref
|
|
// OPERANDS: none
|
|
// DESCRIPTION: Pops the top stack entry and treats it as an address.
|
|
// The value retrieved from that address is pushed. The size of the
|
|
// data retrieved from the dereferenced address is the size of an
|
|
// address on the target machine.
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_deref:
|
|
{
|
|
Value::ValueType value_type = stack.back().GetValueType();
|
|
switch (value_type)
|
|
{
|
|
case Value::eValueTypeHostAddress:
|
|
{
|
|
void *src = (void *)stack.back().GetScalar().ULongLong();
|
|
intptr_t ptr;
|
|
::memcpy (&ptr, src, sizeof(void *));
|
|
stack.back().GetScalar() = ptr;
|
|
stack.back().ClearContext();
|
|
}
|
|
break;
|
|
case Value::eValueTypeLoadAddress:
|
|
if (exe_ctx)
|
|
{
|
|
if (process)
|
|
{
|
|
lldb::addr_t pointer_addr = stack.back().GetScalar().ULongLong(LLDB_INVALID_ADDRESS);
|
|
uint8_t addr_bytes[sizeof(lldb::addr_t)];
|
|
uint32_t addr_size = process->GetAddressByteSize();
|
|
Error error;
|
|
if (process->ReadMemory(pointer_addr, &addr_bytes, addr_size, error) == addr_size)
|
|
{
|
|
DataExtractor addr_data(addr_bytes, sizeof(addr_bytes), process->GetByteOrder(), addr_size);
|
|
uint32_t addr_data_offset = 0;
|
|
stack.back().GetScalar() = addr_data.GetPointer(&addr_data_offset);
|
|
stack.back().ClearContext();
|
|
}
|
|
else
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorStringWithFormat ("Failed to dereference pointer from 0x%llx for DW_OP_deref: %s\n",
|
|
pointer_addr,
|
|
error.AsCString());
|
|
return false;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorStringWithFormat ("NULL process for DW_OP_deref.\n");
|
|
return false;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorStringWithFormat ("NULL execution context for DW_OP_deref.\n");
|
|
return false;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
}
|
|
break;
|
|
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_deref_size
|
|
// OPERANDS: 1
|
|
// 1 - uint8_t that specifies the size of the data to dereference.
|
|
// DESCRIPTION: Behaves like the DW_OP_deref operation: it pops the top
|
|
// stack entry and treats it as an address. The value retrieved from that
|
|
// address is pushed. In the DW_OP_deref_size operation, however, the
|
|
// size in bytes of the data retrieved from the dereferenced address is
|
|
// specified by the single operand. This operand is a 1-byte unsigned
|
|
// integral constant whose value may not be larger than the size of an
|
|
// address on the target machine. The data retrieved is zero extended
|
|
// to the size of an address on the target machine before being pushed
|
|
// on the expression stack.
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_deref_size:
|
|
{
|
|
uint8_t size = opcodes.GetU8(&offset);
|
|
Value::ValueType value_type = stack.back().GetValueType();
|
|
switch (value_type)
|
|
{
|
|
case Value::eValueTypeHostAddress:
|
|
{
|
|
void *src = (void *)stack.back().GetScalar().ULongLong();
|
|
intptr_t ptr;
|
|
::memcpy (&ptr, src, sizeof(void *));
|
|
// I can't decide whether the size operand should apply to the bytes in their
|
|
// lldb-host endianness or the target endianness.. I doubt this'll ever come up
|
|
// but I'll opt for assuming big endian regardless.
|
|
switch (size)
|
|
{
|
|
case 1: ptr = ptr & 0xff; break;
|
|
case 2: ptr = ptr & 0xffff; break;
|
|
case 3: ptr = ptr & 0xffffff; break;
|
|
case 4: ptr = ptr & 0xffffffff; break;
|
|
// the casts are added to work around the case where intptr_t is a 32 bit quantity;
|
|
// presumably we won't hit the 5..7 cases if (void*) is 32-bits in this program.
|
|
case 5: ptr = (intptr_t) ptr & 0xffffffffffULL; break;
|
|
case 6: ptr = (intptr_t) ptr & 0xffffffffffffULL; break;
|
|
case 7: ptr = (intptr_t) ptr & 0xffffffffffffffULL; break;
|
|
default: break;
|
|
}
|
|
stack.back().GetScalar() = ptr;
|
|
stack.back().ClearContext();
|
|
}
|
|
break;
|
|
case Value::eValueTypeLoadAddress:
|
|
if (exe_ctx)
|
|
{
|
|
if (process)
|
|
{
|
|
lldb::addr_t pointer_addr = stack.back().GetScalar().ULongLong(LLDB_INVALID_ADDRESS);
|
|
uint8_t addr_bytes[sizeof(lldb::addr_t)];
|
|
Error error;
|
|
if (process->ReadMemory(pointer_addr, &addr_bytes, size, error) == size)
|
|
{
|
|
DataExtractor addr_data(addr_bytes, sizeof(addr_bytes), process->GetByteOrder(), size);
|
|
uint32_t addr_data_offset = 0;
|
|
switch (size)
|
|
{
|
|
case 1: stack.back().GetScalar() = addr_data.GetU8(&addr_data_offset); break;
|
|
case 2: stack.back().GetScalar() = addr_data.GetU16(&addr_data_offset); break;
|
|
case 4: stack.back().GetScalar() = addr_data.GetU32(&addr_data_offset); break;
|
|
case 8: stack.back().GetScalar() = addr_data.GetU64(&addr_data_offset); break;
|
|
default: stack.back().GetScalar() = addr_data.GetPointer(&addr_data_offset);
|
|
}
|
|
stack.back().ClearContext();
|
|
}
|
|
else
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorStringWithFormat ("Failed to dereference pointer from 0x%llx for DW_OP_deref: %s\n",
|
|
pointer_addr,
|
|
error.AsCString());
|
|
return false;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorStringWithFormat ("NULL process for DW_OP_deref.\n");
|
|
return false;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorStringWithFormat ("NULL execution context for DW_OP_deref.\n");
|
|
return false;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
}
|
|
break;
|
|
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_xderef_size
|
|
// OPERANDS: 1
|
|
// 1 - uint8_t that specifies the size of the data to dereference.
|
|
// DESCRIPTION: Behaves like the DW_OP_xderef operation: the entry at
|
|
// the top of the stack is treated as an address. The second stack
|
|
// entry is treated as an "address space identifier" for those
|
|
// architectures that support multiple address spaces. The top two
|
|
// stack elements are popped, a data item is retrieved through an
|
|
// implementation-defined address calculation and pushed as the new
|
|
// stack top. In the DW_OP_xderef_size operation, however, the size in
|
|
// bytes of the data retrieved from the dereferenced address is
|
|
// specified by the single operand. This operand is a 1-byte unsigned
|
|
// integral constant whose value may not be larger than the size of an
|
|
// address on the target machine. The data retrieved is zero extended
|
|
// to the size of an address on the target machine before being pushed
|
|
// on the expression stack.
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_xderef_size:
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("Unimplemented opcode: DW_OP_xderef_size.");
|
|
return false;
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_xderef
|
|
// OPERANDS: none
|
|
// DESCRIPTION: Provides an extended dereference mechanism. The entry at
|
|
// the top of the stack is treated as an address. The second stack entry
|
|
// is treated as an "address space identifier" for those architectures
|
|
// that support multiple address spaces. The top two stack elements are
|
|
// popped, a data item is retrieved through an implementation-defined
|
|
// address calculation and pushed as the new stack top. The size of the
|
|
// data retrieved from the dereferenced address is the size of an address
|
|
// on the target machine.
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_xderef:
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("Unimplemented opcode: DW_OP_xderef.");
|
|
return false;
|
|
|
|
//----------------------------------------------------------------------
|
|
// All DW_OP_constXXX opcodes have a single operand as noted below:
|
|
//
|
|
// Opcode Operand 1
|
|
// --------------- ----------------------------------------------------
|
|
// DW_OP_const1u 1-byte unsigned integer constant
|
|
// DW_OP_const1s 1-byte signed integer constant
|
|
// DW_OP_const2u 2-byte unsigned integer constant
|
|
// DW_OP_const2s 2-byte signed integer constant
|
|
// DW_OP_const4u 4-byte unsigned integer constant
|
|
// DW_OP_const4s 4-byte signed integer constant
|
|
// DW_OP_const8u 8-byte unsigned integer constant
|
|
// DW_OP_const8s 8-byte signed integer constant
|
|
// DW_OP_constu unsigned LEB128 integer constant
|
|
// DW_OP_consts signed LEB128 integer constant
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_const1u : stack.push_back(Scalar(( uint8_t)opcodes.GetU8 (&offset))); break;
|
|
case DW_OP_const1s : stack.push_back(Scalar(( int8_t)opcodes.GetU8 (&offset))); break;
|
|
case DW_OP_const2u : stack.push_back(Scalar((uint16_t)opcodes.GetU16 (&offset))); break;
|
|
case DW_OP_const2s : stack.push_back(Scalar(( int16_t)opcodes.GetU16 (&offset))); break;
|
|
case DW_OP_const4u : stack.push_back(Scalar((uint32_t)opcodes.GetU32 (&offset))); break;
|
|
case DW_OP_const4s : stack.push_back(Scalar(( int32_t)opcodes.GetU32 (&offset))); break;
|
|
case DW_OP_const8u : stack.push_back(Scalar((uint64_t)opcodes.GetU64 (&offset))); break;
|
|
case DW_OP_const8s : stack.push_back(Scalar(( int64_t)opcodes.GetU64 (&offset))); break;
|
|
case DW_OP_constu : stack.push_back(Scalar(opcodes.GetULEB128 (&offset))); break;
|
|
case DW_OP_consts : stack.push_back(Scalar(opcodes.GetSLEB128 (&offset))); break;
|
|
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_dup
|
|
// OPERANDS: none
|
|
// DESCRIPTION: duplicates the value at the top of the stack
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_dup:
|
|
if (stack.empty())
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("Expression stack empty for DW_OP_dup.");
|
|
return false;
|
|
}
|
|
else
|
|
stack.push_back(stack.back());
|
|
break;
|
|
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_drop
|
|
// OPERANDS: none
|
|
// DESCRIPTION: pops the value at the top of the stack
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_drop:
|
|
if (stack.empty())
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("Expression stack empty for DW_OP_drop.");
|
|
return false;
|
|
}
|
|
else
|
|
stack.pop_back();
|
|
break;
|
|
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_over
|
|
// OPERANDS: none
|
|
// DESCRIPTION: Duplicates the entry currently second in the stack at
|
|
// the top of the stack.
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_over:
|
|
if (stack.size() < 2)
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_over.");
|
|
return false;
|
|
}
|
|
else
|
|
stack.push_back(stack[stack.size() - 2]);
|
|
break;
|
|
|
|
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_pick
|
|
// OPERANDS: uint8_t index into the current stack
|
|
// DESCRIPTION: The stack entry with the specified index (0 through 255,
|
|
// inclusive) is pushed on the stack
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_pick:
|
|
{
|
|
uint8_t pick_idx = opcodes.GetU8(&offset);
|
|
if (pick_idx < stack.size())
|
|
stack.push_back(stack[pick_idx]);
|
|
else
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorStringWithFormat("Index %u out of range for DW_OP_pick.\n", pick_idx);
|
|
return false;
|
|
}
|
|
}
|
|
break;
|
|
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_swap
|
|
// OPERANDS: none
|
|
// DESCRIPTION: swaps the top two stack entries. The entry at the top
|
|
// of the stack becomes the second stack entry, and the second entry
|
|
// becomes the top of the stack
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_swap:
|
|
if (stack.size() < 2)
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_swap.");
|
|
return false;
|
|
}
|
|
else
|
|
{
|
|
tmp = stack.back();
|
|
stack.back() = stack[stack.size() - 2];
|
|
stack[stack.size() - 2] = tmp;
|
|
}
|
|
break;
|
|
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_rot
|
|
// OPERANDS: none
|
|
// DESCRIPTION: Rotates the first three stack entries. The entry at
|
|
// the top of the stack becomes the third stack entry, the second
|
|
// entry becomes the top of the stack, and the third entry becomes
|
|
// the second entry.
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_rot:
|
|
if (stack.size() < 3)
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("Expression stack needs at least 3 items for DW_OP_rot.");
|
|
return false;
|
|
}
|
|
else
|
|
{
|
|
size_t last_idx = stack.size() - 1;
|
|
Value old_top = stack[last_idx];
|
|
stack[last_idx] = stack[last_idx - 1];
|
|
stack[last_idx - 1] = stack[last_idx - 2];
|
|
stack[last_idx - 2] = old_top;
|
|
}
|
|
break;
|
|
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_abs
|
|
// OPERANDS: none
|
|
// DESCRIPTION: pops the top stack entry, interprets it as a signed
|
|
// value and pushes its absolute value. If the absolute value can not be
|
|
// represented, the result is undefined.
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_abs:
|
|
if (stack.empty())
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("Expression stack needs at least 1 item for DW_OP_abs.");
|
|
return false;
|
|
}
|
|
else if (stack.back().ResolveValue(exe_ctx, ast_context).AbsoluteValue() == false)
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("Failed to take the absolute value of the first stack item.");
|
|
return false;
|
|
}
|
|
break;
|
|
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_and
|
|
// OPERANDS: none
|
|
// DESCRIPTION: pops the top two stack values, performs a bitwise and
|
|
// operation on the two, and pushes the result.
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_and:
|
|
if (stack.size() < 2)
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_and.");
|
|
return false;
|
|
}
|
|
else
|
|
{
|
|
tmp = stack.back();
|
|
stack.pop_back();
|
|
stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) & tmp.ResolveValue(exe_ctx, ast_context);
|
|
}
|
|
break;
|
|
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_div
|
|
// OPERANDS: none
|
|
// DESCRIPTION: pops the top two stack values, divides the former second
|
|
// entry by the former top of the stack using signed division, and
|
|
// pushes the result.
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_div:
|
|
if (stack.size() < 2)
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_div.");
|
|
return false;
|
|
}
|
|
else
|
|
{
|
|
tmp = stack.back();
|
|
if (tmp.ResolveValue(exe_ctx, ast_context).IsZero())
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("Divide by zero.");
|
|
return false;
|
|
}
|
|
else
|
|
{
|
|
stack.pop_back();
|
|
stack.back() = stack.back().ResolveValue(exe_ctx, ast_context) / tmp.ResolveValue(exe_ctx, ast_context);
|
|
if (!stack.back().ResolveValue(exe_ctx, ast_context).IsValid())
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("Divide failed.");
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_minus
|
|
// OPERANDS: none
|
|
// DESCRIPTION: pops the top two stack values, subtracts the former top
|
|
// of the stack from the former second entry, and pushes the result.
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_minus:
|
|
if (stack.size() < 2)
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_minus.");
|
|
return false;
|
|
}
|
|
else
|
|
{
|
|
tmp = stack.back();
|
|
stack.pop_back();
|
|
stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) - tmp.ResolveValue(exe_ctx, ast_context);
|
|
}
|
|
break;
|
|
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_mod
|
|
// OPERANDS: none
|
|
// DESCRIPTION: pops the top two stack values and pushes the result of
|
|
// the calculation: former second stack entry modulo the former top of
|
|
// the stack.
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_mod:
|
|
if (stack.size() < 2)
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_mod.");
|
|
return false;
|
|
}
|
|
else
|
|
{
|
|
tmp = stack.back();
|
|
stack.pop_back();
|
|
stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) % tmp.ResolveValue(exe_ctx, ast_context);
|
|
}
|
|
break;
|
|
|
|
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_mul
|
|
// OPERANDS: none
|
|
// DESCRIPTION: pops the top two stack entries, multiplies them
|
|
// together, and pushes the result.
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_mul:
|
|
if (stack.size() < 2)
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_mul.");
|
|
return false;
|
|
}
|
|
else
|
|
{
|
|
tmp = stack.back();
|
|
stack.pop_back();
|
|
stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) * tmp.ResolveValue(exe_ctx, ast_context);
|
|
}
|
|
break;
|
|
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_neg
|
|
// OPERANDS: none
|
|
// DESCRIPTION: pops the top stack entry, and pushes its negation.
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_neg:
|
|
if (stack.empty())
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("Expression stack needs at least 1 item for DW_OP_neg.");
|
|
return false;
|
|
}
|
|
else
|
|
{
|
|
if (stack.back().ResolveValue(exe_ctx, ast_context).UnaryNegate() == false)
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("Unary negate failed.");
|
|
return false;
|
|
}
|
|
}
|
|
break;
|
|
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_not
|
|
// OPERANDS: none
|
|
// DESCRIPTION: pops the top stack entry, and pushes its bitwise
|
|
// complement
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_not:
|
|
if (stack.empty())
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("Expression stack needs at least 1 item for DW_OP_not.");
|
|
return false;
|
|
}
|
|
else
|
|
{
|
|
if (stack.back().ResolveValue(exe_ctx, ast_context).OnesComplement() == false)
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("Logical NOT failed.");
|
|
return false;
|
|
}
|
|
}
|
|
break;
|
|
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_or
|
|
// OPERANDS: none
|
|
// DESCRIPTION: pops the top two stack entries, performs a bitwise or
|
|
// operation on the two, and pushes the result.
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_or:
|
|
if (stack.size() < 2)
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_or.");
|
|
return false;
|
|
}
|
|
else
|
|
{
|
|
tmp = stack.back();
|
|
stack.pop_back();
|
|
stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) | tmp.ResolveValue(exe_ctx, ast_context);
|
|
}
|
|
break;
|
|
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_plus
|
|
// OPERANDS: none
|
|
// DESCRIPTION: pops the top two stack entries, adds them together, and
|
|
// pushes the result.
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_plus:
|
|
if (stack.size() < 2)
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_plus.");
|
|
return false;
|
|
}
|
|
else
|
|
{
|
|
tmp = stack.back();
|
|
stack.pop_back();
|
|
stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) + tmp.ResolveValue(exe_ctx, ast_context);
|
|
}
|
|
break;
|
|
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_plus_uconst
|
|
// OPERANDS: none
|
|
// DESCRIPTION: pops the top stack entry, adds it to the unsigned LEB128
|
|
// constant operand and pushes the result.
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_plus_uconst:
|
|
if (stack.empty())
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("Expression stack needs at least 1 item for DW_OP_plus_uconst.");
|
|
return false;
|
|
}
|
|
else
|
|
{
|
|
uint32_t uconst_value = opcodes.GetULEB128(&offset);
|
|
// Implicit conversion from a UINT to a Scalar...
|
|
stack.back().ResolveValue(exe_ctx, ast_context) += uconst_value;
|
|
if (!stack.back().ResolveValue(exe_ctx, ast_context).IsValid())
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("DW_OP_plus_uconst failed.");
|
|
return false;
|
|
}
|
|
}
|
|
break;
|
|
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_shl
|
|
// OPERANDS: none
|
|
// DESCRIPTION: pops the top two stack entries, shifts the former
|
|
// second entry left by the number of bits specified by the former top
|
|
// of the stack, and pushes the result.
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_shl:
|
|
if (stack.size() < 2)
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_shl.");
|
|
return false;
|
|
}
|
|
else
|
|
{
|
|
tmp = stack.back();
|
|
stack.pop_back();
|
|
stack.back().ResolveValue(exe_ctx, ast_context) <<= tmp.ResolveValue(exe_ctx, ast_context);
|
|
}
|
|
break;
|
|
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_shr
|
|
// OPERANDS: none
|
|
// DESCRIPTION: pops the top two stack entries, shifts the former second
|
|
// entry right logically (filling with zero bits) by the number of bits
|
|
// specified by the former top of the stack, and pushes the result.
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_shr:
|
|
if (stack.size() < 2)
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_shr.");
|
|
return false;
|
|
}
|
|
else
|
|
{
|
|
tmp = stack.back();
|
|
stack.pop_back();
|
|
if (stack.back().ResolveValue(exe_ctx, ast_context).ShiftRightLogical(tmp.ResolveValue(exe_ctx, ast_context)) == false)
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("DW_OP_shr failed.");
|
|
return false;
|
|
}
|
|
}
|
|
break;
|
|
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_shra
|
|
// OPERANDS: none
|
|
// DESCRIPTION: pops the top two stack entries, shifts the former second
|
|
// entry right arithmetically (divide the magnitude by 2, keep the same
|
|
// sign for the result) by the number of bits specified by the former
|
|
// top of the stack, and pushes the result.
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_shra:
|
|
if (stack.size() < 2)
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_shra.");
|
|
return false;
|
|
}
|
|
else
|
|
{
|
|
tmp = stack.back();
|
|
stack.pop_back();
|
|
stack.back().ResolveValue(exe_ctx, ast_context) >>= tmp.ResolveValue(exe_ctx, ast_context);
|
|
}
|
|
break;
|
|
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_xor
|
|
// OPERANDS: none
|
|
// DESCRIPTION: pops the top two stack entries, performs the bitwise
|
|
// exclusive-or operation on the two, and pushes the result.
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_xor:
|
|
if (stack.size() < 2)
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_xor.");
|
|
return false;
|
|
}
|
|
else
|
|
{
|
|
tmp = stack.back();
|
|
stack.pop_back();
|
|
stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) ^ tmp.ResolveValue(exe_ctx, ast_context);
|
|
}
|
|
break;
|
|
|
|
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_skip
|
|
// OPERANDS: int16_t
|
|
// DESCRIPTION: An unconditional branch. Its single operand is a 2-byte
|
|
// signed integer constant. The 2-byte constant is the number of bytes
|
|
// of the DWARF expression to skip forward or backward from the current
|
|
// operation, beginning after the 2-byte constant.
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_skip:
|
|
{
|
|
int16_t skip_offset = (int16_t)opcodes.GetU16(&offset);
|
|
uint32_t new_offset = offset + skip_offset;
|
|
if (new_offset >= opcodes_offset && new_offset < end_offset)
|
|
offset = new_offset;
|
|
else
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("Invalid opcode offset in DW_OP_skip.");
|
|
return false;
|
|
}
|
|
}
|
|
break;
|
|
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_bra
|
|
// OPERANDS: int16_t
|
|
// DESCRIPTION: A conditional branch. Its single operand is a 2-byte
|
|
// signed integer constant. This operation pops the top of stack. If
|
|
// the value popped is not the constant 0, the 2-byte constant operand
|
|
// is the number of bytes of the DWARF expression to skip forward or
|
|
// backward from the current operation, beginning after the 2-byte
|
|
// constant.
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_bra:
|
|
{
|
|
tmp = stack.back();
|
|
stack.pop_back();
|
|
int16_t bra_offset = (int16_t)opcodes.GetU16(&offset);
|
|
Scalar zero(0);
|
|
if (tmp.ResolveValue(exe_ctx, ast_context) != zero)
|
|
{
|
|
uint32_t new_offset = offset + bra_offset;
|
|
if (new_offset >= opcodes_offset && new_offset < end_offset)
|
|
offset = new_offset;
|
|
else
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("Invalid opcode offset in DW_OP_bra.");
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_eq
|
|
// OPERANDS: none
|
|
// DESCRIPTION: pops the top two stack values, compares using the
|
|
// equals (==) operator.
|
|
// STACK RESULT: push the constant value 1 onto the stack if the result
|
|
// of the operation is true or the constant value 0 if the result of the
|
|
// operation is false.
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_eq:
|
|
if (stack.size() < 2)
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_eq.");
|
|
return false;
|
|
}
|
|
else
|
|
{
|
|
tmp = stack.back();
|
|
stack.pop_back();
|
|
stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) == tmp.ResolveValue(exe_ctx, ast_context);
|
|
}
|
|
break;
|
|
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_ge
|
|
// OPERANDS: none
|
|
// DESCRIPTION: pops the top two stack values, compares using the
|
|
// greater than or equal to (>=) operator.
|
|
// STACK RESULT: push the constant value 1 onto the stack if the result
|
|
// of the operation is true or the constant value 0 if the result of the
|
|
// operation is false.
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_ge:
|
|
if (stack.size() < 2)
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_ge.");
|
|
return false;
|
|
}
|
|
else
|
|
{
|
|
tmp = stack.back();
|
|
stack.pop_back();
|
|
stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) >= tmp.ResolveValue(exe_ctx, ast_context);
|
|
}
|
|
break;
|
|
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_gt
|
|
// OPERANDS: none
|
|
// DESCRIPTION: pops the top two stack values, compares using the
|
|
// greater than (>) operator.
|
|
// STACK RESULT: push the constant value 1 onto the stack if the result
|
|
// of the operation is true or the constant value 0 if the result of the
|
|
// operation is false.
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_gt:
|
|
if (stack.size() < 2)
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_gt.");
|
|
return false;
|
|
}
|
|
else
|
|
{
|
|
tmp = stack.back();
|
|
stack.pop_back();
|
|
stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) > tmp.ResolveValue(exe_ctx, ast_context);
|
|
}
|
|
break;
|
|
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_le
|
|
// OPERANDS: none
|
|
// DESCRIPTION: pops the top two stack values, compares using the
|
|
// less than or equal to (<=) operator.
|
|
// STACK RESULT: push the constant value 1 onto the stack if the result
|
|
// of the operation is true or the constant value 0 if the result of the
|
|
// operation is false.
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_le:
|
|
if (stack.size() < 2)
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_le.");
|
|
return false;
|
|
}
|
|
else
|
|
{
|
|
tmp = stack.back();
|
|
stack.pop_back();
|
|
stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) <= tmp.ResolveValue(exe_ctx, ast_context);
|
|
}
|
|
break;
|
|
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_lt
|
|
// OPERANDS: none
|
|
// DESCRIPTION: pops the top two stack values, compares using the
|
|
// less than (<) operator.
|
|
// STACK RESULT: push the constant value 1 onto the stack if the result
|
|
// of the operation is true or the constant value 0 if the result of the
|
|
// operation is false.
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_lt:
|
|
if (stack.size() < 2)
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_lt.");
|
|
return false;
|
|
}
|
|
else
|
|
{
|
|
tmp = stack.back();
|
|
stack.pop_back();
|
|
stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) < tmp.ResolveValue(exe_ctx, ast_context);
|
|
}
|
|
break;
|
|
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_ne
|
|
// OPERANDS: none
|
|
// DESCRIPTION: pops the top two stack values, compares using the
|
|
// not equal (!=) operator.
|
|
// STACK RESULT: push the constant value 1 onto the stack if the result
|
|
// of the operation is true or the constant value 0 if the result of the
|
|
// operation is false.
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_ne:
|
|
if (stack.size() < 2)
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_ne.");
|
|
return false;
|
|
}
|
|
else
|
|
{
|
|
tmp = stack.back();
|
|
stack.pop_back();
|
|
stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) != tmp.ResolveValue(exe_ctx, ast_context);
|
|
}
|
|
break;
|
|
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_litn
|
|
// OPERANDS: none
|
|
// DESCRIPTION: encode the unsigned literal values from 0 through 31.
|
|
// STACK RESULT: push the unsigned literal constant value onto the top
|
|
// of the stack.
|
|
//----------------------------------------------------------------------
|
|
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(Scalar(op - DW_OP_lit0));
|
|
break;
|
|
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_regN
|
|
// OPERANDS: none
|
|
// DESCRIPTION: Push the value in register n on the top of the stack.
|
|
//----------------------------------------------------------------------
|
|
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:
|
|
{
|
|
reg_num = op - DW_OP_reg0;
|
|
|
|
if (ReadRegisterValueAsScalar (reg_ctx, reg_kind, reg_num, error_ptr, tmp))
|
|
stack.push_back(tmp);
|
|
else
|
|
return false;
|
|
}
|
|
break;
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_regx
|
|
// OPERANDS:
|
|
// ULEB128 literal operand that encodes the register.
|
|
// DESCRIPTION: Push the value in register on the top of the stack.
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_regx:
|
|
{
|
|
reg_num = opcodes.GetULEB128(&offset);
|
|
if (ReadRegisterValueAsScalar (reg_ctx, reg_kind, reg_num, error_ptr, tmp))
|
|
stack.push_back(tmp);
|
|
else
|
|
return false;
|
|
}
|
|
break;
|
|
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_bregN
|
|
// OPERANDS:
|
|
// SLEB128 offset from register N
|
|
// DESCRIPTION: Value is in memory at the address specified by register
|
|
// N plus an offset.
|
|
//----------------------------------------------------------------------
|
|
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:
|
|
{
|
|
reg_num = op - DW_OP_breg0;
|
|
|
|
if (ReadRegisterValueAsScalar (reg_ctx, reg_kind, reg_num, error_ptr, tmp))
|
|
{
|
|
int64_t breg_offset = opcodes.GetSLEB128(&offset);
|
|
tmp.ResolveValue(exe_ctx, ast_context) += (uint64_t)breg_offset;
|
|
tmp.ClearContext();
|
|
stack.push_back(tmp);
|
|
stack.back().SetValueType (Value::eValueTypeLoadAddress);
|
|
}
|
|
else
|
|
return false;
|
|
}
|
|
break;
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_bregx
|
|
// OPERANDS: 2
|
|
// ULEB128 literal operand that encodes the register.
|
|
// SLEB128 offset from register N
|
|
// DESCRIPTION: Value is in memory at the address specified by register
|
|
// N plus an offset.
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_bregx:
|
|
{
|
|
reg_num = opcodes.GetULEB128(&offset);
|
|
|
|
if (ReadRegisterValueAsScalar (reg_ctx, reg_kind, reg_num, error_ptr, tmp))
|
|
{
|
|
int64_t breg_offset = opcodes.GetSLEB128(&offset);
|
|
tmp.ResolveValue(exe_ctx, ast_context) += (uint64_t)breg_offset;
|
|
tmp.ClearContext();
|
|
stack.push_back(tmp);
|
|
stack.back().SetValueType (Value::eValueTypeLoadAddress);
|
|
}
|
|
else
|
|
return false;
|
|
}
|
|
break;
|
|
|
|
case DW_OP_fbreg:
|
|
if (exe_ctx)
|
|
{
|
|
if (frame)
|
|
{
|
|
Scalar value;
|
|
if (frame->GetFrameBaseValue(value, error_ptr))
|
|
{
|
|
int64_t fbreg_offset = opcodes.GetSLEB128(&offset);
|
|
value += fbreg_offset;
|
|
stack.push_back(value);
|
|
stack.back().SetValueType (Value::eValueTypeLoadAddress);
|
|
}
|
|
else
|
|
return false;
|
|
}
|
|
else
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString ("Invalid stack frame in context for DW_OP_fbreg opcode.");
|
|
return false;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorStringWithFormat ("NULL execution context for DW_OP_fbreg.\n");
|
|
return false;
|
|
}
|
|
|
|
break;
|
|
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_nop
|
|
// OPERANDS: none
|
|
// DESCRIPTION: A place holder. It has no effect on the location stack
|
|
// or any of its values.
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_nop:
|
|
break;
|
|
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_piece
|
|
// OPERANDS: 1
|
|
// ULEB128: byte size of the piece
|
|
// DESCRIPTION: The operand describes the size in bytes of the piece of
|
|
// the object referenced by the DWARF expression whose result is at the
|
|
// top of the stack. If the piece is located in a register, but does not
|
|
// occupy the entire register, the placement of the piece within that
|
|
// register is defined by the ABI.
|
|
//
|
|
// Many compilers store a single variable in sets of registers, or store
|
|
// a variable partially in memory and partially in registers.
|
|
// DW_OP_piece provides a way of describing how large a part of a
|
|
// variable a particular DWARF expression refers to.
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_piece:
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString ("Unimplemented opcode DW_OP_piece.");
|
|
return false;
|
|
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_push_object_address
|
|
// OPERANDS: none
|
|
// DESCRIPTION: Pushes the address of the object currently being
|
|
// evaluated as part of evaluation of a user presented expression.
|
|
// This object may correspond to an independent variable described by
|
|
// its own DIE or it may be a component of an array, structure, or class
|
|
// whose address has been dynamically determined by an earlier step
|
|
// during user expression evaluation.
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_push_object_address:
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString ("Unimplemented opcode DW_OP_push_object_address.");
|
|
return false;
|
|
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_call2
|
|
// OPERANDS:
|
|
// uint16_t compile unit relative offset of a DIE
|
|
// DESCRIPTION: Performs subroutine calls during evaluation
|
|
// of a DWARF expression. The operand is the 2-byte unsigned offset
|
|
// of a debugging information entry in the current compilation unit.
|
|
//
|
|
// Operand interpretation is exactly like that for DW_FORM_ref2.
|
|
//
|
|
// This operation transfers control of DWARF expression evaluation
|
|
// to the DW_AT_location attribute of the referenced DIE. If there is
|
|
// no such attribute, then there is no effect. Execution of the DWARF
|
|
// expression of a DW_AT_location attribute may add to and/or remove from
|
|
// values on the stack. Execution returns to the point following the call
|
|
// when the end of the attribute is reached. Values on the stack at the
|
|
// time of the call may be used as parameters by the called expression
|
|
// and values left on the stack by the called expression may be used as
|
|
// return values by prior agreement between the calling and called
|
|
// expressions.
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_call2:
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString ("Unimplemented opcode DW_OP_call2.");
|
|
return false;
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_call4
|
|
// OPERANDS: 1
|
|
// uint32_t compile unit relative offset of a DIE
|
|
// DESCRIPTION: Performs a subroutine call during evaluation of a DWARF
|
|
// expression. For DW_OP_call4, the operand is a 4-byte unsigned offset
|
|
// of a debugging information entry in the current compilation unit.
|
|
//
|
|
// Operand interpretation DW_OP_call4 is exactly like that for
|
|
// DW_FORM_ref4.
|
|
//
|
|
// This operation transfers control of DWARF expression evaluation
|
|
// to the DW_AT_location attribute of the referenced DIE. If there is
|
|
// no such attribute, then there is no effect. Execution of the DWARF
|
|
// expression of a DW_AT_location attribute may add to and/or remove from
|
|
// values on the stack. Execution returns to the point following the call
|
|
// when the end of the attribute is reached. Values on the stack at the
|
|
// time of the call may be used as parameters by the called expression
|
|
// and values left on the stack by the called expression may be used as
|
|
// return values by prior agreement between the calling and called
|
|
// expressions.
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_call4:
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString ("Unimplemented opcode DW_OP_call4.");
|
|
return false;
|
|
|
|
#if 0
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_call_ref
|
|
// OPERANDS:
|
|
// uint32_t absolute DIE offset for 32-bit DWARF or a uint64_t
|
|
// absolute DIE offset for 64 bit DWARF.
|
|
// DESCRIPTION: Performs a subroutine call during evaluation of a DWARF
|
|
// expression. Takes a single operand. In the 32-bit DWARF format, the
|
|
// operand is a 4-byte unsigned value; in the 64-bit DWARF format, it
|
|
// is an 8-byte unsigned value. The operand is used as the offset of a
|
|
// debugging information entry in a .debug_info section which may be
|
|
// contained in a shared object for executable other than that
|
|
// containing the operator. For references from one shared object or
|
|
// executable to another, the relocation must be performed by the
|
|
// consumer.
|
|
//
|
|
// Operand interpretation of DW_OP_call_ref is exactly like that for
|
|
// DW_FORM_ref_addr.
|
|
//
|
|
// This operation transfers control of DWARF expression evaluation
|
|
// to the DW_AT_location attribute of the referenced DIE. If there is
|
|
// no such attribute, then there is no effect. Execution of the DWARF
|
|
// expression of a DW_AT_location attribute may add to and/or remove from
|
|
// values on the stack. Execution returns to the point following the call
|
|
// when the end of the attribute is reached. Values on the stack at the
|
|
// time of the call may be used as parameters by the called expression
|
|
// and values left on the stack by the called expression may be used as
|
|
// return values by prior agreement between the calling and called
|
|
// expressions.
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_call_ref:
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString ("Unimplemented opcode DW_OP_call_ref.");
|
|
return false;
|
|
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_APPLE_array_ref
|
|
// OPERANDS: none
|
|
// DESCRIPTION: Pops a value off the stack and uses it as the array
|
|
// index. Pops a second value off the stack and uses it as the array
|
|
// itself. Pushes a value onto the stack representing the element of
|
|
// the array specified by the index.
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_APPLE_array_ref:
|
|
{
|
|
if (stack.size() < 2)
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_APPLE_array_ref.");
|
|
return false;
|
|
}
|
|
|
|
Value index_val = stack.back();
|
|
stack.pop_back();
|
|
Value array_val = stack.back();
|
|
stack.pop_back();
|
|
|
|
Scalar &index_scalar = index_val.ResolveValue(exe_ctx, ast_context);
|
|
int64_t index = index_scalar.SLongLong(LLONG_MAX);
|
|
|
|
if (index == LLONG_MAX)
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("Invalid array index.");
|
|
return false;
|
|
}
|
|
|
|
if (array_val.GetContextType() != Value::eContextTypeClangType)
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("Arrays without Clang types are unhandled at this time.");
|
|
return false;
|
|
}
|
|
|
|
if (array_val.GetValueType() != Value::eValueTypeLoadAddress &&
|
|
array_val.GetValueType() != Value::eValueTypeHostAddress)
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("Array must be stored in memory.");
|
|
return false;
|
|
}
|
|
|
|
void *array_type = array_val.GetClangType();
|
|
|
|
void *member_type;
|
|
uint64_t size = 0;
|
|
|
|
if ((!ClangASTContext::IsPointerType(array_type, &member_type)) &&
|
|
(!ClangASTContext::IsArrayType(array_type, &member_type, &size)))
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("Array reference from something that is neither a pointer nor an array.");
|
|
return false;
|
|
}
|
|
|
|
if (size && (index >= size || index < 0))
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorStringWithFormat("Out of bounds array access. %lld is not in [0, %llu]", index, size);
|
|
return false;
|
|
}
|
|
|
|
uint64_t member_bit_size = ClangASTType::GetClangTypeBitWidth(ast_context, member_type);
|
|
uint64_t member_bit_align = ClangASTType::GetTypeBitAlign(ast_context, member_type);
|
|
uint64_t member_bit_incr = ((member_bit_size + member_bit_align - 1) / member_bit_align) * member_bit_align;
|
|
if (member_bit_incr % 8)
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorStringWithFormat("Array increment is not byte aligned");
|
|
return false;
|
|
}
|
|
int64_t member_offset = (int64_t)(member_bit_incr / 8) * index;
|
|
|
|
Value member;
|
|
|
|
member.SetContext(Value::eContextTypeClangType, member_type);
|
|
member.SetValueType(array_val.GetValueType());
|
|
|
|
addr_t array_base = (addr_t)array_val.GetScalar().ULongLong(LLDB_INVALID_ADDRESS);
|
|
addr_t member_loc = array_base + member_offset;
|
|
member.GetScalar() = (uint64_t)member_loc;
|
|
|
|
stack.push_back(member);
|
|
}
|
|
break;
|
|
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_APPLE_uninit
|
|
// OPERANDS: none
|
|
// DESCRIPTION: Lets us know that the value is currently not initialized
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_APPLE_uninit:
|
|
//return eResultTypeErrorUninitialized;
|
|
break; // Ignore this as we have seen cases where this value is incorrectly added
|
|
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_APPLE_assign
|
|
// OPERANDS: none
|
|
// DESCRIPTION: Pops a value off of the stack and assigns it to the next
|
|
// item on the stack which must be something assignable (inferior
|
|
// Variable, inferior Type with address, inferior register, or
|
|
// expression local variable.
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_APPLE_assign:
|
|
if (stack.size() < 2)
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_APPLE_assign.");
|
|
return false;
|
|
}
|
|
else
|
|
{
|
|
tmp = stack.back();
|
|
stack.pop_back();
|
|
Value::ContextType context_type = stack.back().GetContextType();
|
|
StreamString new_value(Stream::eBinary, 4, lldb::endian::InlHostByteOrder());
|
|
switch (context_type)
|
|
{
|
|
case Value::eContextTypeClangType:
|
|
{
|
|
void *clang_type = stack.back().GetClangType();
|
|
|
|
if (ClangASTContext::IsAggregateType (clang_type))
|
|
{
|
|
Value::ValueType source_value_type = tmp.GetValueType();
|
|
Value::ValueType target_value_type = stack.back().GetValueType();
|
|
|
|
addr_t source_addr = (addr_t)tmp.GetScalar().ULongLong();
|
|
addr_t target_addr = (addr_t)stack.back().GetScalar().ULongLong();
|
|
|
|
size_t byte_size = (ClangASTType::GetClangTypeBitWidth(ast_context, clang_type) + 7) / 8;
|
|
|
|
switch (source_value_type)
|
|
{
|
|
case Value::eValueTypeScalar:
|
|
case Value::eValueTypeFileAddress:
|
|
break;
|
|
|
|
case Value::eValueTypeLoadAddress:
|
|
switch (target_value_type)
|
|
{
|
|
case Value::eValueTypeLoadAddress:
|
|
{
|
|
DataBufferHeap data;
|
|
data.SetByteSize(byte_size);
|
|
|
|
Error error;
|
|
if (process->ReadMemory (source_addr, data.GetBytes(), byte_size, error) != byte_size)
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorStringWithFormat ("Couldn't read a composite type from the target: %s", error.AsCString());
|
|
return false;
|
|
}
|
|
|
|
if (process->WriteMemory (target_addr, data.GetBytes(), byte_size, error) != byte_size)
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorStringWithFormat ("Couldn't write a composite type to the target: %s", error.AsCString());
|
|
return false;
|
|
}
|
|
}
|
|
break;
|
|
case Value::eValueTypeHostAddress:
|
|
if (process->GetByteOrder() != lldb::endian::InlHostByteOrder())
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorStringWithFormat ("Copy of composite types between incompatible byte orders is unimplemented");
|
|
return false;
|
|
}
|
|
else
|
|
{
|
|
Error error;
|
|
if (process->ReadMemory (source_addr, (uint8_t*)target_addr, byte_size, error) != byte_size)
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorStringWithFormat ("Couldn't read a composite type from the target: %s", error.AsCString());
|
|
return false;
|
|
}
|
|
}
|
|
break;
|
|
default:
|
|
return false;
|
|
}
|
|
break;
|
|
case Value::eValueTypeHostAddress:
|
|
switch (target_value_type)
|
|
{
|
|
case Value::eValueTypeLoadAddress:
|
|
if (process->GetByteOrder() != lldb::endian::InlHostByteOrder())
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorStringWithFormat ("Copy of composite types between incompatible byte orders is unimplemented");
|
|
return false;
|
|
}
|
|
else
|
|
{
|
|
Error error;
|
|
if (process->WriteMemory (target_addr, (uint8_t*)source_addr, byte_size, error) != byte_size)
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorStringWithFormat ("Couldn't write a composite type to the target: %s", error.AsCString());
|
|
return false;
|
|
}
|
|
}
|
|
case Value::eValueTypeHostAddress:
|
|
memcpy ((uint8_t*)target_addr, (uint8_t*)source_addr, byte_size);
|
|
break;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (!ClangASTType::SetValueFromScalar (ast_context,
|
|
clang_type,
|
|
tmp.ResolveValue(exe_ctx, ast_context),
|
|
new_value))
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorStringWithFormat ("Couldn't extract a value from an integral type.\n");
|
|
return false;
|
|
}
|
|
|
|
Value::ValueType value_type = stack.back().GetValueType();
|
|
|
|
switch (value_type)
|
|
{
|
|
case Value::eValueTypeLoadAddress:
|
|
case Value::eValueTypeHostAddress:
|
|
{
|
|
AddressType address_type = (value_type == Value::eValueTypeLoadAddress ? eAddressTypeLoad : eAddressTypeHost);
|
|
lldb::addr_t addr = stack.back().GetScalar().ULongLong(LLDB_INVALID_ADDRESS);
|
|
if (!ClangASTType::WriteToMemory (ast_context,
|
|
clang_type,
|
|
exe_ctx,
|
|
addr,
|
|
address_type,
|
|
new_value))
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorStringWithFormat ("Failed to write value to memory at 0x%llx.\n", addr);
|
|
return false;
|
|
}
|
|
}
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
|
|
default:
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString ("Assign failed.");
|
|
return false;
|
|
}
|
|
}
|
|
break;
|
|
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_APPLE_address_of
|
|
// OPERANDS: none
|
|
// DESCRIPTION: Pops a value off of the stack and pushed its address.
|
|
// The top item on the stack must be a variable, or already be a memory
|
|
// location.
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_APPLE_address_of:
|
|
if (stack.empty())
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("Expression stack needs at least 1 item for DW_OP_APPLE_address_of.");
|
|
return false;
|
|
}
|
|
else
|
|
{
|
|
Value::ValueType value_type = stack.back().GetValueType();
|
|
switch (value_type)
|
|
{
|
|
default:
|
|
case Value::eValueTypeScalar: // raw scalar value
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("Top stack item isn't a memory based object.");
|
|
return false;
|
|
|
|
case Value::eValueTypeLoadAddress: // load address value
|
|
case Value::eValueTypeFileAddress: // file address value
|
|
case Value::eValueTypeHostAddress: // host address value (for memory in the process that is using liblldb)
|
|
// Taking the address of an object reduces it to the address
|
|
// of the value and removes any extra context it had.
|
|
//stack.back().SetValueType(Value::eValueTypeScalar);
|
|
stack.back().ClearContext();
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_APPLE_value_of
|
|
// OPERANDS: none
|
|
// DESCRIPTION: Pops a value off of the stack and pushed its value.
|
|
// The top item on the stack must be a variable, expression variable.
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_APPLE_value_of:
|
|
if (stack.empty())
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("Expression stack needs at least 1 items for DW_OP_APPLE_value_of.");
|
|
return false;
|
|
}
|
|
else if (!stack.back().ValueOf(exe_ctx, ast_context))
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString ("Top stack item isn't a valid candidate for DW_OP_APPLE_value_of.");
|
|
return false;
|
|
}
|
|
break;
|
|
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_APPLE_deref_type
|
|
// OPERANDS: none
|
|
// DESCRIPTION: gets the value pointed to by the top stack item
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_APPLE_deref_type:
|
|
{
|
|
if (stack.empty())
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("Expression stack needs at least 1 items for DW_OP_APPLE_deref_type.");
|
|
return false;
|
|
}
|
|
|
|
tmp = stack.back();
|
|
stack.pop_back();
|
|
|
|
if (tmp.GetContextType() != Value::eContextTypeClangType)
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("Item at top of expression stack must have a Clang type");
|
|
return false;
|
|
}
|
|
|
|
void *ptr_type = tmp.GetClangType();
|
|
void *target_type;
|
|
|
|
if (!ClangASTContext::IsPointerType(ptr_type, &target_type))
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("Dereferencing a non-pointer type");
|
|
return false;
|
|
}
|
|
|
|
// TODO do we want all pointers to be dereferenced as load addresses?
|
|
Value::ValueType value_type = tmp.GetValueType();
|
|
|
|
tmp.ResolveValue(exe_ctx, ast_context);
|
|
|
|
tmp.SetValueType(value_type);
|
|
tmp.SetContext(Value::eContextTypeClangType, target_type);
|
|
|
|
stack.push_back(tmp);
|
|
}
|
|
break;
|
|
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_APPLE_expr_local
|
|
// OPERANDS: ULEB128
|
|
// DESCRIPTION: pushes the expression local variable index onto the
|
|
// stack and set the appropriate context so we know the stack item is
|
|
// an expression local variable index.
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_APPLE_expr_local:
|
|
{
|
|
/*
|
|
uint32_t idx = opcodes.GetULEB128(&offset);
|
|
if (expr_locals == NULL)
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorStringWithFormat ("DW_OP_APPLE_expr_local(%u) opcode encountered with no local variable list.\n", idx);
|
|
return false;
|
|
}
|
|
Value *expr_local_variable = expr_locals->GetVariableAtIndex(idx);
|
|
if (expr_local_variable == NULL)
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorStringWithFormat ("DW_OP_APPLE_expr_local(%u) with invalid index %u.\n", idx, idx);
|
|
return false;
|
|
}
|
|
// The proxy code has been removed. If it is ever re-added, please
|
|
// use shared pointers or return by value to avoid possible memory
|
|
// leak (there is no leak here, but in general, no returning pointers
|
|
// that must be manually freed please.
|
|
Value *proxy = expr_local_variable->CreateProxy();
|
|
stack.push_back(*proxy);
|
|
delete proxy;
|
|
//stack.back().SetContext (Value::eContextTypeClangType, expr_local_variable->GetClangType());
|
|
*/
|
|
}
|
|
break;
|
|
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_APPLE_extern
|
|
// OPERANDS: ULEB128
|
|
// DESCRIPTION: pushes a proxy for the extern object index onto the
|
|
// stack.
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_APPLE_extern:
|
|
{
|
|
/*
|
|
uint32_t idx = opcodes.GetULEB128(&offset);
|
|
if (!decl_map)
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorStringWithFormat ("DW_OP_APPLE_extern(%u) opcode encountered with no decl map.\n", idx);
|
|
return false;
|
|
}
|
|
Value *extern_var = decl_map->GetValueForIndex(idx);
|
|
if (!extern_var)
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorStringWithFormat ("DW_OP_APPLE_extern(%u) with invalid index %u.\n", idx, idx);
|
|
return false;
|
|
}
|
|
// The proxy code has been removed. If it is ever re-added, please
|
|
// use shared pointers or return by value to avoid possible memory
|
|
// leak (there is no leak here, but in general, no returning pointers
|
|
// that must be manually freed please.
|
|
Value *proxy = extern_var->CreateProxy();
|
|
stack.push_back(*proxy);
|
|
delete proxy;
|
|
*/
|
|
}
|
|
break;
|
|
|
|
case DW_OP_APPLE_scalar_cast:
|
|
if (stack.empty())
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("Expression stack needs at least 1 item for DW_OP_APPLE_scalar_cast.");
|
|
return false;
|
|
}
|
|
else
|
|
{
|
|
// Simple scalar cast
|
|
if (!stack.back().ResolveValue(exe_ctx, ast_context).Cast((Scalar::Type)opcodes.GetU8(&offset)))
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("Cast failed.");
|
|
return false;
|
|
}
|
|
}
|
|
break;
|
|
|
|
|
|
case DW_OP_APPLE_clang_cast:
|
|
if (stack.empty())
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString("Expression stack needs at least 1 item for DW_OP_APPLE_clang_cast.");
|
|
return false;
|
|
}
|
|
else
|
|
{
|
|
void *clang_type = (void *)opcodes.GetMaxU64(&offset, sizeof(void*));
|
|
stack.back().SetContext (Value::eContextTypeClangType, clang_type);
|
|
}
|
|
break;
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_APPLE_constf
|
|
// OPERANDS: 1 byte float length, followed by that many bytes containing
|
|
// the constant float data.
|
|
// DESCRIPTION: Push a float value onto the expression stack.
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_APPLE_constf: // 0xF6 - 1 byte float size, followed by constant float data
|
|
{
|
|
uint8_t float_length = opcodes.GetU8(&offset);
|
|
if (sizeof(float) == float_length)
|
|
tmp.ResolveValue(exe_ctx, ast_context) = opcodes.GetFloat (&offset);
|
|
else if (sizeof(double) == float_length)
|
|
tmp.ResolveValue(exe_ctx, ast_context) = opcodes.GetDouble (&offset);
|
|
else if (sizeof(long double) == float_length)
|
|
tmp.ResolveValue(exe_ctx, ast_context) = opcodes.GetLongDouble (&offset);
|
|
else
|
|
{
|
|
StreamString new_value;
|
|
opcodes.Dump(&new_value, offset, eFormatBytes, 1, float_length, UINT32_MAX, DW_INVALID_ADDRESS, 0, 0);
|
|
|
|
if (error_ptr)
|
|
error_ptr->SetErrorStringWithFormat ("DW_OP_APPLE_constf(<%u> %s) unsupported float size.\n", float_length, new_value.GetData());
|
|
return false;
|
|
}
|
|
tmp.SetValueType(Value::eValueTypeScalar);
|
|
tmp.ClearContext();
|
|
stack.push_back(tmp);
|
|
}
|
|
break;
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_APPLE_clear
|
|
// OPERANDS: none
|
|
// DESCRIPTION: Clears the expression stack.
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_APPLE_clear:
|
|
stack.clear();
|
|
break;
|
|
|
|
//----------------------------------------------------------------------
|
|
// OPCODE: DW_OP_APPLE_error
|
|
// OPERANDS: none
|
|
// DESCRIPTION: Pops a value off of the stack and pushed its value.
|
|
// The top item on the stack must be a variable, expression variable.
|
|
//----------------------------------------------------------------------
|
|
case DW_OP_APPLE_error: // 0xFF - Stops expression evaluation and returns an error (no args)
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString ("Generic error.");
|
|
return false;
|
|
#endif // #if 0
|
|
|
|
}
|
|
}
|
|
|
|
if (stack.empty())
|
|
{
|
|
if (error_ptr)
|
|
error_ptr->SetErrorString ("Stack empty after evaluation.");
|
|
return false;
|
|
}
|
|
else if (log && log->GetVerbose())
|
|
{
|
|
size_t count = stack.size();
|
|
log->Printf("Stack after operation has %lu values:", count);
|
|
for (size_t i=0; i<count; ++i)
|
|
{
|
|
StreamString new_value;
|
|
new_value.Printf("[%zu]", i);
|
|
stack[i].Dump(&new_value);
|
|
log->Printf(" %s", new_value.GetData());
|
|
}
|
|
}
|
|
|
|
result = stack.back();
|
|
return true; // Return true on success
|
|
}
|
|
|