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gerrit-public.fairphone.software / fp2-dev / platform / external / lldb / 4c32029943b762dbba4750137d606c59adf26fe8 / . / source / Expression / DWARFExpression.cpp
blob: 538afb71d5601238c0c8f67444933eb3a1ab6eb3 [file] [log] [blame]
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1//===-- DWARFExpression.cpp -------------------------------------*- C++ -*-===//
2//
3// The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10#include "lldb/Expression/DWARFExpression.h"
11
12#include <vector>
13
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]14#include "lldb/Core/DataEncoder.h"
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]15#include "lldb/Core/dwarf.h"
16#include "lldb/Core/Log.h"
Greg Clayton061b79d2011-05-09 20:18:18 +0000[diff] [blame]17#include "lldb/Core/RegisterValue.h"
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]18#include "lldb/Core/StreamString.h"
19#include "lldb/Core/Scalar.h"
20#include "lldb/Core/Value.h"
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]21#include "lldb/Core/VMRange.h"
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]22
23#include "lldb/Expression/ClangExpressionDeclMap.h"
24#include "lldb/Expression/ClangExpressionVariable.h"
25
Greg Claytoncd548032011-02-01 01:31:41 +0000[diff] [blame]26#include "lldb/Host/Endian.h"
Jim Ingham8521b842011-12-01 03:01:30 +0000[diff] [blame]27#include "lldb/Host/Host.h"
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]28
29#include "lldb/lldb-private-log.h"
30
Greg Clayton1674b122010-07-21 22:12:05 +0000[diff] [blame]31#include "lldb/Symbol/ClangASTType.h"
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]32#include "lldb/Symbol/ClangASTContext.h"
33#include "lldb/Symbol/Type.h"
34
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]35#include "lldb/Target/ABI.h"
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]36#include "lldb/Target/ExecutionContext.h"
37#include "lldb/Target/Process.h"
38#include "lldb/Target/RegisterContext.h"
39#include "lldb/Target/StackFrame.h"
40
41using namespace lldb;
42using namespace lldb_private;
43
44const char *
45DW_OP_value_to_name (uint32_t val)
46{
47 static char invalid[100];
48 switch (val) {
49 case 0x03: return "DW_OP_addr";
50 case 0x06: return "DW_OP_deref";
51 case 0x08: return "DW_OP_const1u";
52 case 0x09: return "DW_OP_const1s";
53 case 0x0a: return "DW_OP_const2u";
54 case 0x0b: return "DW_OP_const2s";
55 case 0x0c: return "DW_OP_const4u";
56 case 0x0d: return "DW_OP_const4s";
57 case 0x0e: return "DW_OP_const8u";
58 case 0x0f: return "DW_OP_const8s";
59 case 0x10: return "DW_OP_constu";
60 case 0x11: return "DW_OP_consts";
61 case 0x12: return "DW_OP_dup";
62 case 0x13: return "DW_OP_drop";
63 case 0x14: return "DW_OP_over";
64 case 0x15: return "DW_OP_pick";
65 case 0x16: return "DW_OP_swap";
66 case 0x17: return "DW_OP_rot";
67 case 0x18: return "DW_OP_xderef";
68 case 0x19: return "DW_OP_abs";
69 case 0x1a: return "DW_OP_and";
70 case 0x1b: return "DW_OP_div";
71 case 0x1c: return "DW_OP_minus";
72 case 0x1d: return "DW_OP_mod";
73 case 0x1e: return "DW_OP_mul";
74 case 0x1f: return "DW_OP_neg";
75 case 0x20: return "DW_OP_not";
76 case 0x21: return "DW_OP_or";
77 case 0x22: return "DW_OP_plus";
78 case 0x23: return "DW_OP_plus_uconst";
79 case 0x24: return "DW_OP_shl";
80 case 0x25: return "DW_OP_shr";
81 case 0x26: return "DW_OP_shra";
82 case 0x27: return "DW_OP_xor";
83 case 0x2f: return "DW_OP_skip";
84 case 0x28: return "DW_OP_bra";
85 case 0x29: return "DW_OP_eq";
86 case 0x2a: return "DW_OP_ge";
87 case 0x2b: return "DW_OP_gt";
88 case 0x2c: return "DW_OP_le";
89 case 0x2d: return "DW_OP_lt";
90 case 0x2e: return "DW_OP_ne";
91 case 0x30: return "DW_OP_lit0";
92 case 0x31: return "DW_OP_lit1";
93 case 0x32: return "DW_OP_lit2";
94 case 0x33: return "DW_OP_lit3";
95 case 0x34: return "DW_OP_lit4";
96 case 0x35: return "DW_OP_lit5";
97 case 0x36: return "DW_OP_lit6";
98 case 0x37: return "DW_OP_lit7";
99 case 0x38: return "DW_OP_lit8";
100 case 0x39: return "DW_OP_lit9";
101 case 0x3a: return "DW_OP_lit10";
102 case 0x3b: return "DW_OP_lit11";
103 case 0x3c: return "DW_OP_lit12";
104 case 0x3d: return "DW_OP_lit13";
105 case 0x3e: return "DW_OP_lit14";
106 case 0x3f: return "DW_OP_lit15";
107 case 0x40: return "DW_OP_lit16";
108 case 0x41: return "DW_OP_lit17";
109 case 0x42: return "DW_OP_lit18";
110 case 0x43: return "DW_OP_lit19";
111 case 0x44: return "DW_OP_lit20";
112 case 0x45: return "DW_OP_lit21";
113 case 0x46: return "DW_OP_lit22";
114 case 0x47: return "DW_OP_lit23";
115 case 0x48: return "DW_OP_lit24";
116 case 0x49: return "DW_OP_lit25";
117 case 0x4a: return "DW_OP_lit26";
118 case 0x4b: return "DW_OP_lit27";
119 case 0x4c: return "DW_OP_lit28";
120 case 0x4d: return "DW_OP_lit29";
121 case 0x4e: return "DW_OP_lit30";
122 case 0x4f: return "DW_OP_lit31";
123 case 0x50: return "DW_OP_reg0";
124 case 0x51: return "DW_OP_reg1";
125 case 0x52: return "DW_OP_reg2";
126 case 0x53: return "DW_OP_reg3";
127 case 0x54: return "DW_OP_reg4";
128 case 0x55: return "DW_OP_reg5";
129 case 0x56: return "DW_OP_reg6";
130 case 0x57: return "DW_OP_reg7";
131 case 0x58: return "DW_OP_reg8";
132 case 0x59: return "DW_OP_reg9";
133 case 0x5a: return "DW_OP_reg10";
134 case 0x5b: return "DW_OP_reg11";
135 case 0x5c: return "DW_OP_reg12";
136 case 0x5d: return "DW_OP_reg13";
137 case 0x5e: return "DW_OP_reg14";
138 case 0x5f: return "DW_OP_reg15";
139 case 0x60: return "DW_OP_reg16";
140 case 0x61: return "DW_OP_reg17";
141 case 0x62: return "DW_OP_reg18";
142 case 0x63: return "DW_OP_reg19";
143 case 0x64: return "DW_OP_reg20";
144 case 0x65: return "DW_OP_reg21";
145 case 0x66: return "DW_OP_reg22";
146 case 0x67: return "DW_OP_reg23";
147 case 0x68: return "DW_OP_reg24";
148 case 0x69: return "DW_OP_reg25";
149 case 0x6a: return "DW_OP_reg26";
150 case 0x6b: return "DW_OP_reg27";
151 case 0x6c: return "DW_OP_reg28";
152 case 0x6d: return "DW_OP_reg29";
153 case 0x6e: return "DW_OP_reg30";
154 case 0x6f: return "DW_OP_reg31";
155 case 0x70: return "DW_OP_breg0";
156 case 0x71: return "DW_OP_breg1";
157 case 0x72: return "DW_OP_breg2";
158 case 0x73: return "DW_OP_breg3";
159 case 0x74: return "DW_OP_breg4";
160 case 0x75: return "DW_OP_breg5";
161 case 0x76: return "DW_OP_breg6";
162 case 0x77: return "DW_OP_breg7";
163 case 0x78: return "DW_OP_breg8";
164 case 0x79: return "DW_OP_breg9";
165 case 0x7a: return "DW_OP_breg10";
166 case 0x7b: return "DW_OP_breg11";
167 case 0x7c: return "DW_OP_breg12";
168 case 0x7d: return "DW_OP_breg13";
169 case 0x7e: return "DW_OP_breg14";
170 case 0x7f: return "DW_OP_breg15";
171 case 0x80: return "DW_OP_breg16";
172 case 0x81: return "DW_OP_breg17";
173 case 0x82: return "DW_OP_breg18";
174 case 0x83: return "DW_OP_breg19";
175 case 0x84: return "DW_OP_breg20";
176 case 0x85: return "DW_OP_breg21";
177 case 0x86: return "DW_OP_breg22";
178 case 0x87: return "DW_OP_breg23";
179 case 0x88: return "DW_OP_breg24";
180 case 0x89: return "DW_OP_breg25";
181 case 0x8a: return "DW_OP_breg26";
182 case 0x8b: return "DW_OP_breg27";
183 case 0x8c: return "DW_OP_breg28";
184 case 0x8d: return "DW_OP_breg29";
185 case 0x8e: return "DW_OP_breg30";
186 case 0x8f: return "DW_OP_breg31";
187 case 0x90: return "DW_OP_regx";
188 case 0x91: return "DW_OP_fbreg";
189 case 0x92: return "DW_OP_bregx";
190 case 0x93: return "DW_OP_piece";
191 case 0x94: return "DW_OP_deref_size";
192 case 0x95: return "DW_OP_xderef_size";
193 case 0x96: return "DW_OP_nop";
194 case 0x97: return "DW_OP_push_object_address";
195 case 0x98: return "DW_OP_call2";
196 case 0x99: return "DW_OP_call4";
197 case 0x9a: return "DW_OP_call_ref";
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]198// case DW_OP_APPLE_array_ref: return "DW_OP_APPLE_array_ref";
199// case DW_OP_APPLE_extern: return "DW_OP_APPLE_extern";
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]200 case DW_OP_APPLE_uninit: return "DW_OP_APPLE_uninit";
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]201// case DW_OP_APPLE_assign: return "DW_OP_APPLE_assign";
202// case DW_OP_APPLE_address_of: return "DW_OP_APPLE_address_of";
203// case DW_OP_APPLE_value_of: return "DW_OP_APPLE_value_of";
204// case DW_OP_APPLE_deref_type: return "DW_OP_APPLE_deref_type";
205// case DW_OP_APPLE_expr_local: return "DW_OP_APPLE_expr_local";
206// case DW_OP_APPLE_constf: return "DW_OP_APPLE_constf";
207// case DW_OP_APPLE_scalar_cast: return "DW_OP_APPLE_scalar_cast";
208// case DW_OP_APPLE_clang_cast: return "DW_OP_APPLE_clang_cast";
209// case DW_OP_APPLE_clear: return "DW_OP_APPLE_clear";
210// case DW_OP_APPLE_error: return "DW_OP_APPLE_error";
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]211 default:
212 snprintf (invalid, sizeof(invalid), "Unknown DW_OP constant: 0x%x", val);
213 return invalid;
214 }
215}
216
217
218//----------------------------------------------------------------------
219// DWARFExpression constructor
220//----------------------------------------------------------------------
221DWARFExpression::DWARFExpression() :
222 m_data(),
223 m_reg_kind (eRegisterKindDWARF),
Greg Claytonbdcb6ab2011-01-25 23:55:37 +0000[diff] [blame]224 m_loclist_slide (LLDB_INVALID_ADDRESS)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]225{
226}
227
228DWARFExpression::DWARFExpression(const DWARFExpression& rhs) :
229 m_data(rhs.m_data),
230 m_reg_kind (rhs.m_reg_kind),
Greg Claytonbdcb6ab2011-01-25 23:55:37 +0000[diff] [blame]231 m_loclist_slide(rhs.m_loclist_slide)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]232{
233}
234
235
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]236DWARFExpression::DWARFExpression(const DataExtractor& data, uint32_t data_offset, uint32_t data_length) :
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]237 m_data(data, data_offset, data_length),
238 m_reg_kind (eRegisterKindDWARF),
Greg Claytonbdcb6ab2011-01-25 23:55:37 +0000[diff] [blame]239 m_loclist_slide(LLDB_INVALID_ADDRESS)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]240{
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]241}
242
243//----------------------------------------------------------------------
244// Destructor
245//----------------------------------------------------------------------
246DWARFExpression::~DWARFExpression()
247{
248}
249
250
251bool
252DWARFExpression::IsValid() const
253{
254 return m_data.GetByteSize() > 0;
255}
256
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]257void
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]258DWARFExpression::SetOpcodeData (const DataExtractor& data)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]259{
260 m_data = data;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]261}
262
263void
Greg Clayton4fa86fe2012-08-10 23:33:27 +0000[diff] [blame]264DWARFExpression::CopyOpcodeData (const DataExtractor& data, uint32_t data_offset, uint32_t data_length)
265{
266 const uint8_t *bytes = data.PeekData(data_offset, data_length);
Greg Claytoncaddaf42012-08-11 00:49:14 +0000[diff] [blame]267 if (bytes)
268 {
269 m_data.SetData(DataBufferSP(new DataBufferHeap(bytes, data_length)));
270 m_data.SetByteOrder(data.GetByteOrder());
271 m_data.SetAddressByteSize(data.GetAddressByteSize());
272 }
Greg Clayton4fa86fe2012-08-10 23:33:27 +0000[diff] [blame]273}
274
275void
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]276DWARFExpression::SetOpcodeData (const DataExtractor& data, uint32_t data_offset, uint32_t data_length)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]277{
278 m_data.SetData(data, data_offset, data_length);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]279}
280
281void
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]282DWARFExpression::DumpLocation (Stream *s, uint32_t offset, uint32_t length, lldb::DescriptionLevel level, ABI *abi) const
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]283{
284 if (!m_data.ValidOffsetForDataOfSize(offset, length))
285 return;
286 const uint32_t start_offset = offset;
287 const uint32_t end_offset = offset + length;
288 while (m_data.ValidOffset(offset) && offset < end_offset)
289 {
290 const uint32_t op_offset = offset;
291 const uint8_t op = m_data.GetU8(&offset);
292
293 switch (level)
294 {
Greg Clayton54e7afa2010-07-09 20:39:50 +0000[diff] [blame]295 default:
296 break;
297
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]298 case lldb::eDescriptionLevelBrief:
299 if (offset > start_offset)
300 s->PutChar(' ');
301 break;
302
303 case lldb::eDescriptionLevelFull:
304 case lldb::eDescriptionLevelVerbose:
305 if (offset > start_offset)
306 s->EOL();
307 s->Indent();
308 if (level == lldb::eDescriptionLevelFull)
309 break;
310 // Fall through for verbose and print offset and DW_OP prefix..
311 s->Printf("0x%8.8x: %s", op_offset, op >= DW_OP_APPLE_uninit ? "DW_OP_APPLE_" : "DW_OP_");
312 break;
313 }
314
315 switch (op)
316 {
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]317 case DW_OP_addr: *s << "DW_OP_addr(" << m_data.GetAddress(&offset) << ") "; break; // 0x03 1 address
318 case DW_OP_deref: *s << "DW_OP_deref"; break; // 0x06
319 case DW_OP_const1u: s->Printf("DW_OP_const1u(0x%2.2x) ", m_data.GetU8(&offset)); break; // 0x08 1 1-byte constant
320 case DW_OP_const1s: s->Printf("DW_OP_const1s(0x%2.2x) ", m_data.GetU8(&offset)); break; // 0x09 1 1-byte constant
321 case DW_OP_const2u: s->Printf("DW_OP_const2u(0x%4.4x) ", m_data.GetU16(&offset)); break; // 0x0a 1 2-byte constant
322 case DW_OP_const2s: s->Printf("DW_OP_const2s(0x%4.4x) ", m_data.GetU16(&offset)); break; // 0x0b 1 2-byte constant
323 case DW_OP_const4u: s->Printf("DW_OP_const4u(0x%8.8x) ", m_data.GetU32(&offset)); break; // 0x0c 1 4-byte constant
324 case DW_OP_const4s: s->Printf("DW_OP_const4s(0x%8.8x) ", m_data.GetU32(&offset)); break; // 0x0d 1 4-byte constant
Daniel Malea5f35a4b2012-11-29 21:49:15 +0000[diff] [blame]325 case DW_OP_const8u: s->Printf("DW_OP_const8u(0x%16.16" PRIx64 ") ", m_data.GetU64(&offset)); break; // 0x0e 1 8-byte constant
326 case DW_OP_const8s: s->Printf("DW_OP_const8s(0x%16.16" PRIx64 ") ", m_data.GetU64(&offset)); break; // 0x0f 1 8-byte constant
327 case DW_OP_constu: s->Printf("DW_OP_constu(0x%" PRIx64 ") ", m_data.GetULEB128(&offset)); break; // 0x10 1 ULEB128 constant
328 case DW_OP_consts: s->Printf("DW_OP_consts(0x%" PRId64 ") ", m_data.GetSLEB128(&offset)); break; // 0x11 1 SLEB128 constant
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]329 case DW_OP_dup: s->PutCString("DW_OP_dup"); break; // 0x12
330 case DW_OP_drop: s->PutCString("DW_OP_drop"); break; // 0x13
331 case DW_OP_over: s->PutCString("DW_OP_over"); break; // 0x14
332 case DW_OP_pick: s->Printf("DW_OP_pick(0x%2.2x) ", m_data.GetU8(&offset)); break; // 0x15 1 1-byte stack index
333 case DW_OP_swap: s->PutCString("DW_OP_swap"); break; // 0x16
334 case DW_OP_rot: s->PutCString("DW_OP_rot"); break; // 0x17
335 case DW_OP_xderef: s->PutCString("DW_OP_xderef"); break; // 0x18
336 case DW_OP_abs: s->PutCString("DW_OP_abs"); break; // 0x19
337 case DW_OP_and: s->PutCString("DW_OP_and"); break; // 0x1a
338 case DW_OP_div: s->PutCString("DW_OP_div"); break; // 0x1b
339 case DW_OP_minus: s->PutCString("DW_OP_minus"); break; // 0x1c
340 case DW_OP_mod: s->PutCString("DW_OP_mod"); break; // 0x1d
341 case DW_OP_mul: s->PutCString("DW_OP_mul"); break; // 0x1e
342 case DW_OP_neg: s->PutCString("DW_OP_neg"); break; // 0x1f
343 case DW_OP_not: s->PutCString("DW_OP_not"); break; // 0x20
344 case DW_OP_or: s->PutCString("DW_OP_or"); break; // 0x21
345 case DW_OP_plus: s->PutCString("DW_OP_plus"); break; // 0x22
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]346 case DW_OP_plus_uconst: // 0x23 1 ULEB128 addend
Daniel Malea5f35a4b2012-11-29 21:49:15 +0000[diff] [blame]347 s->Printf("DW_OP_plus_uconst(0x%" PRIx64 ") ", m_data.GetULEB128(&offset));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]348 break;
349
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]350 case DW_OP_shl: s->PutCString("DW_OP_shl"); break; // 0x24
351 case DW_OP_shr: s->PutCString("DW_OP_shr"); break; // 0x25
352 case DW_OP_shra: s->PutCString("DW_OP_shra"); break; // 0x26
353 case DW_OP_xor: s->PutCString("DW_OP_xor"); break; // 0x27
354 case DW_OP_skip: s->Printf("DW_OP_skip(0x%4.4x)", m_data.GetU16(&offset)); break; // 0x2f 1 signed 2-byte constant
355 case DW_OP_bra: s->Printf("DW_OP_bra(0x%4.4x)", m_data.GetU16(&offset)); break; // 0x28 1 signed 2-byte constant
356 case DW_OP_eq: s->PutCString("DW_OP_eq"); break; // 0x29
357 case DW_OP_ge: s->PutCString("DW_OP_ge"); break; // 0x2a
358 case DW_OP_gt: s->PutCString("DW_OP_gt"); break; // 0x2b
359 case DW_OP_le: s->PutCString("DW_OP_le"); break; // 0x2c
360 case DW_OP_lt: s->PutCString("DW_OP_lt"); break; // 0x2d
361 case DW_OP_ne: s->PutCString("DW_OP_ne"); break; // 0x2e
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]362
363 case DW_OP_lit0: // 0x30
364 case DW_OP_lit1: // 0x31
365 case DW_OP_lit2: // 0x32
366 case DW_OP_lit3: // 0x33
367 case DW_OP_lit4: // 0x34
368 case DW_OP_lit5: // 0x35
369 case DW_OP_lit6: // 0x36
370 case DW_OP_lit7: // 0x37
371 case DW_OP_lit8: // 0x38
372 case DW_OP_lit9: // 0x39
373 case DW_OP_lit10: // 0x3A
374 case DW_OP_lit11: // 0x3B
375 case DW_OP_lit12: // 0x3C
376 case DW_OP_lit13: // 0x3D
377 case DW_OP_lit14: // 0x3E
378 case DW_OP_lit15: // 0x3F
379 case DW_OP_lit16: // 0x40
380 case DW_OP_lit17: // 0x41
381 case DW_OP_lit18: // 0x42
382 case DW_OP_lit19: // 0x43
383 case DW_OP_lit20: // 0x44
384 case DW_OP_lit21: // 0x45
385 case DW_OP_lit22: // 0x46
386 case DW_OP_lit23: // 0x47
387 case DW_OP_lit24: // 0x48
388 case DW_OP_lit25: // 0x49
389 case DW_OP_lit26: // 0x4A
390 case DW_OP_lit27: // 0x4B
391 case DW_OP_lit28: // 0x4C
392 case DW_OP_lit29: // 0x4D
393 case DW_OP_lit30: // 0x4E
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]394 case DW_OP_lit31: s->Printf("DW_OP_lit%i", op - DW_OP_lit0); break; // 0x4f
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]395
396 case DW_OP_reg0: // 0x50
397 case DW_OP_reg1: // 0x51
398 case DW_OP_reg2: // 0x52
399 case DW_OP_reg3: // 0x53
400 case DW_OP_reg4: // 0x54
401 case DW_OP_reg5: // 0x55
402 case DW_OP_reg6: // 0x56
403 case DW_OP_reg7: // 0x57
404 case DW_OP_reg8: // 0x58
405 case DW_OP_reg9: // 0x59
406 case DW_OP_reg10: // 0x5A
407 case DW_OP_reg11: // 0x5B
408 case DW_OP_reg12: // 0x5C
409 case DW_OP_reg13: // 0x5D
410 case DW_OP_reg14: // 0x5E
411 case DW_OP_reg15: // 0x5F
412 case DW_OP_reg16: // 0x60
413 case DW_OP_reg17: // 0x61
414 case DW_OP_reg18: // 0x62
415 case DW_OP_reg19: // 0x63
416 case DW_OP_reg20: // 0x64
417 case DW_OP_reg21: // 0x65
418 case DW_OP_reg22: // 0x66
419 case DW_OP_reg23: // 0x67
420 case DW_OP_reg24: // 0x68
421 case DW_OP_reg25: // 0x69
422 case DW_OP_reg26: // 0x6A
423 case DW_OP_reg27: // 0x6B
424 case DW_OP_reg28: // 0x6C
425 case DW_OP_reg29: // 0x6D
426 case DW_OP_reg30: // 0x6E
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]427 case DW_OP_reg31: // 0x6F
428 {
429 uint32_t reg_num = op - DW_OP_reg0;
430 if (abi)
431 {
432 RegisterInfo reg_info;
433 if (abi->GetRegisterInfoByKind(m_reg_kind, reg_num, reg_info))
434 {
435 if (reg_info.name)
436 {
437 s->PutCString (reg_info.name);
438 break;
439 }
440 else if (reg_info.alt_name)
441 {
442 s->PutCString (reg_info.alt_name);
443 break;
444 }
445 }
446 }
447 s->Printf("DW_OP_reg%u", reg_num); break;
448 }
449 break;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]450
451 case DW_OP_breg0:
452 case DW_OP_breg1:
453 case DW_OP_breg2:
454 case DW_OP_breg3:
455 case DW_OP_breg4:
456 case DW_OP_breg5:
457 case DW_OP_breg6:
458 case DW_OP_breg7:
459 case DW_OP_breg8:
460 case DW_OP_breg9:
461 case DW_OP_breg10:
462 case DW_OP_breg11:
463 case DW_OP_breg12:
464 case DW_OP_breg13:
465 case DW_OP_breg14:
466 case DW_OP_breg15:
467 case DW_OP_breg16:
468 case DW_OP_breg17:
469 case DW_OP_breg18:
470 case DW_OP_breg19:
471 case DW_OP_breg20:
472 case DW_OP_breg21:
473 case DW_OP_breg22:
474 case DW_OP_breg23:
475 case DW_OP_breg24:
476 case DW_OP_breg25:
477 case DW_OP_breg26:
478 case DW_OP_breg27:
479 case DW_OP_breg28:
480 case DW_OP_breg29:
481 case DW_OP_breg30:
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]482 case DW_OP_breg31:
483 {
484 uint32_t reg_num = op - DW_OP_breg0;
485 int64_t reg_offset = m_data.GetSLEB128(&offset);
486 if (abi)
487 {
488 RegisterInfo reg_info;
489 if (abi->GetRegisterInfoByKind(m_reg_kind, reg_num, reg_info))
490 {
491 if (reg_info.name)
492 {
Daniel Malea5f35a4b2012-11-29 21:49:15 +0000[diff] [blame]493 s->Printf("[%s%+" PRIi64 "]", reg_info.name, reg_offset);
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]494 break;
495 }
496 else if (reg_info.alt_name)
497 {
Daniel Malea5f35a4b2012-11-29 21:49:15 +0000[diff] [blame]498 s->Printf("[%s%+" PRIi64 "]", reg_info.alt_name, reg_offset);
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]499 break;
500 }
501 }
502 }
Daniel Malea5f35a4b2012-11-29 21:49:15 +0000[diff] [blame]503 s->Printf("DW_OP_breg%i(0x%" PRIx64 ")", reg_num, reg_offset);
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]504 }
505 break;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]506
507 case DW_OP_regx: // 0x90 1 ULEB128 register
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]508 {
509 uint64_t reg_num = m_data.GetULEB128(&offset);
510 if (abi)
511 {
512 RegisterInfo reg_info;
513 if (abi->GetRegisterInfoByKind(m_reg_kind, reg_num, reg_info))
514 {
515 if (reg_info.name)
516 {
517 s->PutCString (reg_info.name);
518 break;
519 }
520 else if (reg_info.alt_name)
521 {
522 s->PutCString (reg_info.alt_name);
523 break;
524 }
525 }
526 }
Daniel Malea5f35a4b2012-11-29 21:49:15 +0000[diff] [blame]527 s->Printf("DW_OP_regx(%" PRIu64 ")", reg_num); break;
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]528 }
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]529 break;
530 case DW_OP_fbreg: // 0x91 1 SLEB128 offset
Daniel Malea5f35a4b2012-11-29 21:49:15 +0000[diff] [blame]531 s->Printf("DW_OP_fbreg(%" PRIi64 ")",m_data.GetSLEB128(&offset));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]532 break;
533 case DW_OP_bregx: // 0x92 2 ULEB128 register followed by SLEB128 offset
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]534 {
535 uint32_t reg_num = m_data.GetULEB128(&offset);
536 int64_t reg_offset = m_data.GetSLEB128(&offset);
537 if (abi)
538 {
539 RegisterInfo reg_info;
540 if (abi->GetRegisterInfoByKind(m_reg_kind, reg_num, reg_info))
541 {
542 if (reg_info.name)
543 {
Daniel Malea5f35a4b2012-11-29 21:49:15 +0000[diff] [blame]544 s->Printf("[%s%+" PRIi64 "]", reg_info.name, reg_offset);
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]545 break;
546 }
547 else if (reg_info.alt_name)
548 {
Daniel Malea5f35a4b2012-11-29 21:49:15 +0000[diff] [blame]549 s->Printf("[%s%+" PRIi64 "]", reg_info.alt_name, reg_offset);
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]550 break;
551 }
552 }
553 }
Daniel Malea5f35a4b2012-11-29 21:49:15 +0000[diff] [blame]554 s->Printf("DW_OP_bregx(reg=%u,offset=%" PRIi64 ")", reg_num, reg_offset);
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]555 }
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]556 break;
557 case DW_OP_piece: // 0x93 1 ULEB128 size of piece addressed
Daniel Malea5f35a4b2012-11-29 21:49:15 +0000[diff] [blame]558 s->Printf("DW_OP_piece(0x%" PRIx64 ")", m_data.GetULEB128(&offset));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]559 break;
560 case DW_OP_deref_size: // 0x94 1 1-byte size of data retrieved
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]561 s->Printf("DW_OP_deref_size(0x%2.2x)", m_data.GetU8(&offset));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]562 break;
563 case DW_OP_xderef_size: // 0x95 1 1-byte size of data retrieved
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]564 s->Printf("DW_OP_xderef_size(0x%2.2x)", m_data.GetU8(&offset));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]565 break;
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]566 case DW_OP_nop: s->PutCString("DW_OP_nop"); break; // 0x96
567 case DW_OP_push_object_address: s->PutCString("DW_OP_push_object_address"); break; // 0x97 DWARF3
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]568 case DW_OP_call2: // 0x98 DWARF3 1 2-byte offset of DIE
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]569 s->Printf("DW_OP_call2(0x%4.4x)", m_data.GetU16(&offset));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]570 break;
571 case DW_OP_call4: // 0x99 DWARF3 1 4-byte offset of DIE
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]572 s->Printf("DW_OP_call4(0x%8.8x)", m_data.GetU32(&offset));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]573 break;
574 case DW_OP_call_ref: // 0x9a DWARF3 1 4- or 8-byte offset of DIE
Daniel Malea5f35a4b2012-11-29 21:49:15 +0000[diff] [blame]575 s->Printf("DW_OP_call_ref(0x%8.8" PRIx64 ")", m_data.GetAddress(&offset));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]576 break;
577// case DW_OP_form_tls_address: s << "form_tls_address"; break; // 0x9b DWARF3
578// case DW_OP_call_frame_cfa: s << "call_frame_cfa"; break; // 0x9c DWARF3
579// case DW_OP_bit_piece: // 0x9d DWARF3 2
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]580// s->Printf("DW_OP_bit_piece(0x%x, 0x%x)", m_data.GetULEB128(&offset), m_data.GetULEB128(&offset));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]581// break;
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]582// case DW_OP_lo_user: s->PutCString("DW_OP_lo_user"); break; // 0xe0
583// case DW_OP_hi_user: s->PutCString("DW_OP_hi_user"); break; // 0xff
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]584// case DW_OP_APPLE_extern:
Daniel Malea5f35a4b2012-11-29 21:49:15 +0000[diff] [blame]585// s->Printf("DW_OP_APPLE_extern(%" PRIu64 ")", m_data.GetULEB128(&offset));
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]586// break;
587// case DW_OP_APPLE_array_ref:
588// s->PutCString("DW_OP_APPLE_array_ref");
589// break;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]590 case DW_OP_APPLE_uninit:
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]591 s->PutCString("DW_OP_APPLE_uninit"); // 0xF0
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]592 break;
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]593// case DW_OP_APPLE_assign: // 0xF1 - pops value off and assigns it to second item on stack (2nd item must have assignable context)
594// s->PutCString("DW_OP_APPLE_assign");
595// break;
596// 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)
597// s->PutCString("DW_OP_APPLE_address_of");
598// break;
599// 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)
600// s->PutCString("DW_OP_APPLE_value_of");
601// break;
602// 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)
603// s->PutCString("DW_OP_APPLE_deref_type");
604// break;
605// case DW_OP_APPLE_expr_local: // 0xF5 - ULEB128 expression local index
Daniel Malea5f35a4b2012-11-29 21:49:15 +0000[diff] [blame]606// s->Printf("DW_OP_APPLE_expr_local(%" PRIu64 ")", m_data.GetULEB128(&offset));
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]607// break;
608// case DW_OP_APPLE_constf: // 0xF6 - 1 byte float size, followed by constant float data
609// {
610// uint8_t float_length = m_data.GetU8(&offset);
611// s->Printf("DW_OP_APPLE_constf(<%u> ", float_length);
612// m_data.Dump(s, offset, eFormatHex, float_length, 1, UINT32_MAX, DW_INVALID_ADDRESS, 0, 0);
613// s->PutChar(')');
614// // Consume the float data
615// m_data.GetData(&offset, float_length);
616// }
617// break;
618// case DW_OP_APPLE_scalar_cast:
619// s->Printf("DW_OP_APPLE_scalar_cast(%s)", Scalar::GetValueTypeAsCString ((Scalar::Type)m_data.GetU8(&offset)));
620// break;
621// case DW_OP_APPLE_clang_cast:
622// {
623// clang::Type *clang_type = (clang::Type *)m_data.GetMaxU64(&offset, sizeof(void*));
624// s->Printf("DW_OP_APPLE_clang_cast(%p)", clang_type);
625// }
626// break;
627// case DW_OP_APPLE_clear:
628// s->PutCString("DW_OP_APPLE_clear");
629// break;
630// case DW_OP_APPLE_error: // 0xFF - Stops expression evaluation and returns an error (no args)
631// s->PutCString("DW_OP_APPLE_error");
632// break;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]633 }
634 }
635}
636
637void
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]638DWARFExpression::SetLocationListSlide (addr_t slide)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]639{
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]640 m_loclist_slide = slide;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]641}
642
643int
644DWARFExpression::GetRegisterKind ()
645{
646 return m_reg_kind;
647}
648
649void
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]650DWARFExpression::SetRegisterKind (RegisterKind reg_kind)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]651{
652 m_reg_kind = reg_kind;
653}
654
655bool
656DWARFExpression::IsLocationList() const
657{
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]658 return m_loclist_slide != LLDB_INVALID_ADDRESS;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]659}
660
661void
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]662DWARFExpression::GetDescription (Stream *s, lldb::DescriptionLevel level, addr_t location_list_base_addr, ABI *abi) const
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]663{
664 if (IsLocationList())
665 {
666 // We have a location list
667 uint32_t offset = 0;
668 uint32_t count = 0;
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]669 addr_t curr_base_addr = location_list_base_addr;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]670 while (m_data.ValidOffset(offset))
671 {
672 lldb::addr_t begin_addr_offset = m_data.GetAddress(&offset);
673 lldb::addr_t end_addr_offset = m_data.GetAddress(&offset);
674 if (begin_addr_offset < end_addr_offset)
675 {
676 if (count > 0)
677 s->PutCString(", ");
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]678 VMRange addr_range(curr_base_addr + begin_addr_offset, curr_base_addr + end_addr_offset);
679 addr_range.Dump(s, 0, 8);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]680 s->PutChar('{');
681 uint32_t location_length = m_data.GetU16(&offset);
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]682 DumpLocation (s, offset, location_length, level, abi);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]683 s->PutChar('}');
684 offset += location_length;
685 }
686 else if (begin_addr_offset == 0 && end_addr_offset == 0)
687 {
688 // The end of the location list is marked by both the start and end offset being zero
689 break;
690 }
691 else
692 {
Greg Claytonb3448432011-03-24 21:19:54 +0000[diff] [blame]693 if ((m_data.GetAddressByteSize() == 4 && (begin_addr_offset == UINT32_MAX)) ||
694 (m_data.GetAddressByteSize() == 8 && (begin_addr_offset == UINT64_MAX)))
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]695 {
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]696 curr_base_addr = end_addr_offset + location_list_base_addr;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]697 // We have a new base address
698 if (count > 0)
699 s->PutCString(", ");
700 *s << "base_addr = " << end_addr_offset;
701 }
702 }
703
704 count++;
705 }
706 }
707 else
708 {
709 // We have a normal location that contains DW_OP location opcodes
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]710 DumpLocation (s, 0, m_data.GetByteSize(), level, abi);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]711 }
712}
713
714static bool
715ReadRegisterValueAsScalar
716(
Greg Clayton061b79d2011-05-09 20:18:18 +0000[diff] [blame]717 RegisterContext *reg_ctx,
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]718 uint32_t reg_kind,
719 uint32_t reg_num,
720 Error *error_ptr,
721 Value &value
722)
723{
Greg Clayton061b79d2011-05-09 20:18:18 +0000[diff] [blame]724 if (reg_ctx == NULL)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]725 {
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]726 if (error_ptr)
727 error_ptr->SetErrorStringWithFormat("No register context in frame.\n");
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]728 }
729 else
730 {
Greg Clayton061b79d2011-05-09 20:18:18 +0000[diff] [blame]731 uint32_t native_reg = reg_ctx->ConvertRegisterKindToRegisterNumber(reg_kind, reg_num);
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]732 if (native_reg == LLDB_INVALID_REGNUM)
733 {
734 if (error_ptr)
735 error_ptr->SetErrorStringWithFormat("Unable to convert register kind=%u reg_num=%u to a native register number.\n", reg_kind, reg_num);
736 }
737 else
738 {
Greg Clayton061b79d2011-05-09 20:18:18 +0000[diff] [blame]739 const RegisterInfo *reg_info = reg_ctx->GetRegisterInfoAtIndex(native_reg);
740 RegisterValue reg_value;
741 if (reg_ctx->ReadRegister (reg_info, reg_value))
742 {
743 if (reg_value.GetScalarValue(value.GetScalar()))
744 {
745 value.SetValueType (Value::eValueTypeScalar);
Greg Clayton82f07462011-05-30 00:49:24 +0000[diff] [blame]746 value.SetContext (Value::eContextTypeRegisterInfo,
747 const_cast<RegisterInfo *>(reg_info));
Greg Clayton061b79d2011-05-09 20:18:18 +0000[diff] [blame]748 if (error_ptr)
749 error_ptr->Clear();
750 return true;
751 }
752 else
753 {
Greg Clayton82f07462011-05-30 00:49:24 +0000[diff] [blame]754 // If we get this error, then we need to implement a value
755 // buffer in the dwarf expression evaluation function...
Greg Clayton061b79d2011-05-09 20:18:18 +0000[diff] [blame]756 if (error_ptr)
Greg Clayton82f07462011-05-30 00:49:24 +0000[diff] [blame]757 error_ptr->SetErrorStringWithFormat ("register %s can't be converted to a scalar value",
758 reg_info->name);
Greg Clayton061b79d2011-05-09 20:18:18 +0000[diff] [blame]759 }
760 }
761 else
762 {
763 if (error_ptr)
Greg Clayton82f07462011-05-30 00:49:24 +0000[diff] [blame]764 error_ptr->SetErrorStringWithFormat("register %s is not available", reg_info->name);
Greg Clayton061b79d2011-05-09 20:18:18 +0000[diff] [blame]765 }
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]766 }
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]767 }
768 return false;
769}
770
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]771//bool
772//DWARFExpression::LocationListContainsLoadAddress (Process* process, const Address &addr) const
773//{
774// return LocationListContainsLoadAddress(process, addr.GetLoadAddress(process));
775//}
776//
777//bool
778//DWARFExpression::LocationListContainsLoadAddress (Process* process, addr_t load_addr) const
779//{
780// if (load_addr == LLDB_INVALID_ADDRESS)
781// return false;
782//
783// if (IsLocationList())
784// {
785// uint32_t offset = 0;
786//
787// addr_t loc_list_base_addr = m_loclist_slide.GetLoadAddress(process);
788//
789// if (loc_list_base_addr == LLDB_INVALID_ADDRESS)
790// return false;
791//
792// while (m_data.ValidOffset(offset))
793// {
794// // We need to figure out what the value is for the location.
795// addr_t lo_pc = m_data.GetAddress(&offset);
796// addr_t hi_pc = m_data.GetAddress(&offset);
797// if (lo_pc == 0 && hi_pc == 0)
798// break;
799// else
800// {
801// lo_pc += loc_list_base_addr;
802// hi_pc += loc_list_base_addr;
803//
804// if (lo_pc <= load_addr && load_addr < hi_pc)
805// return true;
806//
807// offset += m_data.GetU16(&offset);
808// }
809// }
810// }
811// return false;
812//}
Greg Claytonb04e7a82010-08-24 21:05:24 +0000[diff] [blame]813
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]814static uint32_t
815GetOpcodeDataSize (const DataExtractor &data, const uint32_t data_offset, const uint8_t op)
816{
817 uint32_t offset = data_offset;
818 switch (op)
819 {
820 case DW_OP_addr:
821 case DW_OP_call_ref: // 0x9a 1 address sized offset of DIE (DWARF3)
822 return data.GetAddressByteSize();
823
824 // Opcodes with no arguments
825 case DW_OP_deref: // 0x06
826 case DW_OP_dup: // 0x12
827 case DW_OP_drop: // 0x13
828 case DW_OP_over: // 0x14
829 case DW_OP_swap: // 0x16
830 case DW_OP_rot: // 0x17
831 case DW_OP_xderef: // 0x18
832 case DW_OP_abs: // 0x19
833 case DW_OP_and: // 0x1a
834 case DW_OP_div: // 0x1b
835 case DW_OP_minus: // 0x1c
836 case DW_OP_mod: // 0x1d
837 case DW_OP_mul: // 0x1e
838 case DW_OP_neg: // 0x1f
839 case DW_OP_not: // 0x20
840 case DW_OP_or: // 0x21
841 case DW_OP_plus: // 0x22
842 case DW_OP_shl: // 0x24
843 case DW_OP_shr: // 0x25
844 case DW_OP_shra: // 0x26
845 case DW_OP_xor: // 0x27
846 case DW_OP_eq: // 0x29
847 case DW_OP_ge: // 0x2a
848 case DW_OP_gt: // 0x2b
849 case DW_OP_le: // 0x2c
850 case DW_OP_lt: // 0x2d
851 case DW_OP_ne: // 0x2e
852 case DW_OP_lit0: // 0x30
853 case DW_OP_lit1: // 0x31
854 case DW_OP_lit2: // 0x32
855 case DW_OP_lit3: // 0x33
856 case DW_OP_lit4: // 0x34
857 case DW_OP_lit5: // 0x35
858 case DW_OP_lit6: // 0x36
859 case DW_OP_lit7: // 0x37
860 case DW_OP_lit8: // 0x38
861 case DW_OP_lit9: // 0x39
862 case DW_OP_lit10: // 0x3A
863 case DW_OP_lit11: // 0x3B
864 case DW_OP_lit12: // 0x3C
865 case DW_OP_lit13: // 0x3D
866 case DW_OP_lit14: // 0x3E
867 case DW_OP_lit15: // 0x3F
868 case DW_OP_lit16: // 0x40
869 case DW_OP_lit17: // 0x41
870 case DW_OP_lit18: // 0x42
871 case DW_OP_lit19: // 0x43
872 case DW_OP_lit20: // 0x44
873 case DW_OP_lit21: // 0x45
874 case DW_OP_lit22: // 0x46
875 case DW_OP_lit23: // 0x47
876 case DW_OP_lit24: // 0x48
877 case DW_OP_lit25: // 0x49
878 case DW_OP_lit26: // 0x4A
879 case DW_OP_lit27: // 0x4B
880 case DW_OP_lit28: // 0x4C
881 case DW_OP_lit29: // 0x4D
882 case DW_OP_lit30: // 0x4E
883 case DW_OP_lit31: // 0x4f
884 case DW_OP_reg0: // 0x50
885 case DW_OP_reg1: // 0x51
886 case DW_OP_reg2: // 0x52
887 case DW_OP_reg3: // 0x53
888 case DW_OP_reg4: // 0x54
889 case DW_OP_reg5: // 0x55
890 case DW_OP_reg6: // 0x56
891 case DW_OP_reg7: // 0x57
892 case DW_OP_reg8: // 0x58
893 case DW_OP_reg9: // 0x59
894 case DW_OP_reg10: // 0x5A
895 case DW_OP_reg11: // 0x5B
896 case DW_OP_reg12: // 0x5C
897 case DW_OP_reg13: // 0x5D
898 case DW_OP_reg14: // 0x5E
899 case DW_OP_reg15: // 0x5F
900 case DW_OP_reg16: // 0x60
901 case DW_OP_reg17: // 0x61
902 case DW_OP_reg18: // 0x62
903 case DW_OP_reg19: // 0x63
904 case DW_OP_reg20: // 0x64
905 case DW_OP_reg21: // 0x65
906 case DW_OP_reg22: // 0x66
907 case DW_OP_reg23: // 0x67
908 case DW_OP_reg24: // 0x68
909 case DW_OP_reg25: // 0x69
910 case DW_OP_reg26: // 0x6A
911 case DW_OP_reg27: // 0x6B
912 case DW_OP_reg28: // 0x6C
913 case DW_OP_reg29: // 0x6D
914 case DW_OP_reg30: // 0x6E
915 case DW_OP_reg31: // 0x6F
916 case DW_OP_nop: // 0x96
917 case DW_OP_push_object_address: // 0x97 DWARF3
918 case DW_OP_form_tls_address: // 0x9b DWARF3
919 case DW_OP_call_frame_cfa: // 0x9c DWARF3
Greg Claytonc6c37562011-12-01 04:06:15 +0000[diff] [blame]920 case DW_OP_stack_value: // 0x9f DWARF4
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]921 return 0;
922
923 // Opcodes with a single 1 byte arguments
924 case DW_OP_const1u: // 0x08 1 1-byte constant
925 case DW_OP_const1s: // 0x09 1 1-byte constant
926 case DW_OP_pick: // 0x15 1 1-byte stack index
927 case DW_OP_deref_size: // 0x94 1 1-byte size of data retrieved
928 case DW_OP_xderef_size: // 0x95 1 1-byte size of data retrieved
929 return 1;
930
931 // Opcodes with a single 2 byte arguments
932 case DW_OP_const2u: // 0x0a 1 2-byte constant
933 case DW_OP_const2s: // 0x0b 1 2-byte constant
934 case DW_OP_skip: // 0x2f 1 signed 2-byte constant
935 case DW_OP_bra: // 0x28 1 signed 2-byte constant
936 case DW_OP_call2: // 0x98 1 2-byte offset of DIE (DWARF3)
937 return 2;
938
939 // Opcodes with a single 4 byte arguments
940 case DW_OP_const4u: // 0x0c 1 4-byte constant
941 case DW_OP_const4s: // 0x0d 1 4-byte constant
942 case DW_OP_call4: // 0x99 1 4-byte offset of DIE (DWARF3)
943 return 4;
944
945 // Opcodes with a single 8 byte arguments
946 case DW_OP_const8u: // 0x0e 1 8-byte constant
947 case DW_OP_const8s: // 0x0f 1 8-byte constant
948 return 8;
949
950 // All opcodes that have a single ULEB (signed or unsigned) argument
951 case DW_OP_constu: // 0x10 1 ULEB128 constant
952 case DW_OP_consts: // 0x11 1 SLEB128 constant
953 case DW_OP_plus_uconst: // 0x23 1 ULEB128 addend
954 case DW_OP_breg0: // 0x70 1 ULEB128 register
955 case DW_OP_breg1: // 0x71 1 ULEB128 register
956 case DW_OP_breg2: // 0x72 1 ULEB128 register
957 case DW_OP_breg3: // 0x73 1 ULEB128 register
958 case DW_OP_breg4: // 0x74 1 ULEB128 register
959 case DW_OP_breg5: // 0x75 1 ULEB128 register
960 case DW_OP_breg6: // 0x76 1 ULEB128 register
961 case DW_OP_breg7: // 0x77 1 ULEB128 register
962 case DW_OP_breg8: // 0x78 1 ULEB128 register
963 case DW_OP_breg9: // 0x79 1 ULEB128 register
964 case DW_OP_breg10: // 0x7a 1 ULEB128 register
965 case DW_OP_breg11: // 0x7b 1 ULEB128 register
966 case DW_OP_breg12: // 0x7c 1 ULEB128 register
967 case DW_OP_breg13: // 0x7d 1 ULEB128 register
968 case DW_OP_breg14: // 0x7e 1 ULEB128 register
969 case DW_OP_breg15: // 0x7f 1 ULEB128 register
970 case DW_OP_breg16: // 0x80 1 ULEB128 register
971 case DW_OP_breg17: // 0x81 1 ULEB128 register
972 case DW_OP_breg18: // 0x82 1 ULEB128 register
973 case DW_OP_breg19: // 0x83 1 ULEB128 register
974 case DW_OP_breg20: // 0x84 1 ULEB128 register
975 case DW_OP_breg21: // 0x85 1 ULEB128 register
976 case DW_OP_breg22: // 0x86 1 ULEB128 register
977 case DW_OP_breg23: // 0x87 1 ULEB128 register
978 case DW_OP_breg24: // 0x88 1 ULEB128 register
979 case DW_OP_breg25: // 0x89 1 ULEB128 register
980 case DW_OP_breg26: // 0x8a 1 ULEB128 register
981 case DW_OP_breg27: // 0x8b 1 ULEB128 register
982 case DW_OP_breg28: // 0x8c 1 ULEB128 register
983 case DW_OP_breg29: // 0x8d 1 ULEB128 register
984 case DW_OP_breg30: // 0x8e 1 ULEB128 register
985 case DW_OP_breg31: // 0x8f 1 ULEB128 register
986 case DW_OP_regx: // 0x90 1 ULEB128 register
987 case DW_OP_fbreg: // 0x91 1 SLEB128 offset
988 case DW_OP_piece: // 0x93 1 ULEB128 size of piece addressed
989 data.Skip_LEB128(&offset);
990 return offset - data_offset;
991
Greg Claytonc6c37562011-12-01 04:06:15 +0000[diff] [blame]992 // All opcodes that have a 2 ULEB (signed or unsigned) arguments
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]993 case DW_OP_bregx: // 0x92 2 ULEB128 register followed by SLEB128 offset
994 case DW_OP_bit_piece: // 0x9d ULEB128 bit size, ULEB128 bit offset (DWARF3);
995 data.Skip_LEB128(&offset);
996 data.Skip_LEB128(&offset);
997 return offset - data_offset;
Greg Claytonc6c37562011-12-01 04:06:15 +0000[diff] [blame]998
999 case DW_OP_implicit_value: // 0x9e ULEB128 size followed by block of that size (DWARF4)
1000 {
1001 uint64_t block_len = data.Skip_LEB128(&offset);
1002 offset += block_len;
1003 return offset - data_offset;
1004 }
1005
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]1006 default:
Greg Clayton2f28ece2012-01-04 22:56:43 +0000[diff] [blame]1007 break;
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]1008 }
1009 return UINT32_MAX;
1010}
1011
1012bool
Greg Clayton2f28ece2012-01-04 22:56:43 +0000[diff] [blame]1013DWARFExpression::LocationContains_DW_OP_addr (lldb::addr_t file_addr, bool &error) const
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]1014{
Greg Clayton2f28ece2012-01-04 22:56:43 +0000[diff] [blame]1015 error = false;
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]1016 if (IsLocationList())
1017 return false;
1018 uint32_t offset = 0;
1019 while (m_data.ValidOffset(offset))
1020 {
1021 const uint8_t op = m_data.GetU8(&offset);
1022
1023 if (op == DW_OP_addr)
1024 {
1025 if (file_addr == LLDB_INVALID_ADDRESS)
1026 return true;
1027 addr_t op_file_addr = m_data.GetAddress(&offset);
1028 if (op_file_addr == file_addr)
1029 return true;
1030 }
1031 else
1032 {
1033 const uint32_t op_arg_size = GetOpcodeDataSize (m_data, offset, op);
1034 if (op_arg_size == UINT32_MAX)
Greg Clayton2f28ece2012-01-04 22:56:43 +0000[diff] [blame]1035 {
1036 error = true;
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]1037 break;
Greg Clayton2f28ece2012-01-04 22:56:43 +0000[diff] [blame]1038 }
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]1039 offset += op_arg_size;
1040 }
1041 }
1042 return false;
1043}
1044
1045bool
1046DWARFExpression::Update_DW_OP_addr (lldb::addr_t file_addr)
1047{
1048 if (IsLocationList())
1049 return false;
1050 uint32_t offset = 0;
1051 while (m_data.ValidOffset(offset))
1052 {
1053 const uint8_t op = m_data.GetU8(&offset);
1054
1055 if (op == DW_OP_addr)
1056 {
1057 const uint8_t addr_byte_size = m_data.GetAddressByteSize();
1058 // We have to make a copy of the data as we don't know if this
1059 // data is from a read only memory mapped buffer, so we duplicate
1060 // all of the data first, then modify it, and if all goes well,
1061 // we then replace the data for this expression
1062
1063 // So first we copy the data into a heap buffer
1064 std::auto_ptr<DataBufferHeap> head_data_ap (new DataBufferHeap (m_data.GetDataStart(),
1065 m_data.GetByteSize()));
1066
1067 // Make en encoder so we can write the address into the buffer using
1068 // the correct byte order (endianness)
1069 DataEncoder encoder (head_data_ap->GetBytes(),
1070 head_data_ap->GetByteSize(),
1071 m_data.GetByteOrder(),
1072 addr_byte_size);
1073
1074 // Replace the address in the new buffer
1075 if (encoder.PutMaxU64 (offset, addr_byte_size, file_addr) == UINT32_MAX)
1076 return false;
1077
1078 // All went well, so now we can reset the data using a shared
1079 // pointer to the heap data so "m_data" will now correctly
1080 // manage the heap data.
1081 m_data.SetData (DataBufferSP (head_data_ap.release()));
1082 return true;
1083 }
1084 else
1085 {
1086 const uint32_t op_arg_size = GetOpcodeDataSize (m_data, offset, op);
1087 if (op_arg_size == UINT32_MAX)
1088 break;
1089 offset += op_arg_size;
1090 }
1091 }
1092 return false;
1093}
1094
Greg Claytonb04e7a82010-08-24 21:05:24 +0000[diff] [blame]1095bool
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1096DWARFExpression::LocationListContainsAddress (lldb::addr_t loclist_base_addr, lldb::addr_t addr) const
Greg Claytonb04e7a82010-08-24 21:05:24 +0000[diff] [blame]1097{
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1098 if (addr == LLDB_INVALID_ADDRESS)
Greg Claytonb04e7a82010-08-24 21:05:24 +0000[diff] [blame]1099 return false;
1100
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1101 if (IsLocationList())
1102 {
1103 uint32_t offset = 0;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1104
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1105 if (loclist_base_addr == LLDB_INVALID_ADDRESS)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1106 return false;
1107
1108 while (m_data.ValidOffset(offset))
1109 {
1110 // We need to figure out what the value is for the location.
1111 addr_t lo_pc = m_data.GetAddress(&offset);
1112 addr_t hi_pc = m_data.GetAddress(&offset);
1113 if (lo_pc == 0 && hi_pc == 0)
1114 break;
1115 else
1116 {
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1117 lo_pc += loclist_base_addr - m_loclist_slide;
1118 hi_pc += loclist_base_addr - m_loclist_slide;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1119
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1120 if (lo_pc <= addr && addr < hi_pc)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1121 return true;
1122
1123 offset += m_data.GetU16(&offset);
1124 }
1125 }
1126 }
1127 return false;
1128}
Greg Claytonb04e7a82010-08-24 21:05:24 +0000[diff] [blame]1129
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1130bool
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]1131DWARFExpression::GetLocation (addr_t base_addr, addr_t pc, uint32_t &offset, uint32_t &length)
1132{
1133 offset = 0;
1134 if (!IsLocationList())
1135 {
1136 length = m_data.GetByteSize();
1137 return true;
1138 }
1139
1140 if (base_addr != LLDB_INVALID_ADDRESS && pc != LLDB_INVALID_ADDRESS)
1141 {
1142 addr_t curr_base_addr = base_addr;
1143
1144 while (m_data.ValidOffset(offset))
1145 {
1146 // We need to figure out what the value is for the location.
1147 addr_t lo_pc = m_data.GetAddress(&offset);
1148 addr_t hi_pc = m_data.GetAddress(&offset);
1149 if (lo_pc == 0 && hi_pc == 0)
1150 {
1151 break;
1152 }
1153 else
1154 {
1155 lo_pc += curr_base_addr - m_loclist_slide;
1156 hi_pc += curr_base_addr - m_loclist_slide;
1157
1158 length = m_data.GetU16(&offset);
1159
1160 if (length > 0 && lo_pc <= pc && pc < hi_pc)
1161 return true;
1162
1163 offset += length;
1164 }
1165 }
1166 }
1167 offset = UINT32_MAX;
1168 length = 0;
1169 return false;
1170}
1171
1172bool
1173DWARFExpression::DumpLocationForAddress (Stream *s,
1174 lldb::DescriptionLevel level,
1175 addr_t base_addr,
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]1176 addr_t address,
1177 ABI *abi)
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]1178{
1179 uint32_t offset = 0;
1180 uint32_t length = 0;
1181
1182 if (GetLocation (base_addr, address, offset, length))
1183 {
1184 if (length > 0)
1185 {
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]1186 DumpLocation(s, offset, length, level, abi);
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]1187 return true;
1188 }
1189 }
1190 return false;
1191}
1192
1193bool
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1194DWARFExpression::Evaluate
1195(
1196 ExecutionContextScope *exe_scope,
1197 clang::ASTContext *ast_context,
Greg Claytonbdcb6ab2011-01-25 23:55:37 +0000[diff] [blame]1198 ClangExpressionVariableList *expr_locals,
1199 ClangExpressionDeclMap *decl_map,
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1200 lldb::addr_t loclist_base_load_addr,
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1201 const Value* initial_value_ptr,
1202 Value& result,
1203 Error *error_ptr
1204) const
1205{
1206 ExecutionContext exe_ctx (exe_scope);
Greg Claytonbdcb6ab2011-01-25 23:55:37 +0000[diff] [blame]1207 return Evaluate(&exe_ctx, ast_context, expr_locals, decl_map, NULL, loclist_base_load_addr, initial_value_ptr, result, error_ptr);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1208}
1209
1210bool
1211DWARFExpression::Evaluate
1212(
1213 ExecutionContext *exe_ctx,
1214 clang::ASTContext *ast_context,
Greg Claytonbdcb6ab2011-01-25 23:55:37 +0000[diff] [blame]1215 ClangExpressionVariableList *expr_locals,
1216 ClangExpressionDeclMap *decl_map,
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]1217 RegisterContext *reg_ctx,
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1218 lldb::addr_t loclist_base_load_addr,
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1219 const Value* initial_value_ptr,
1220 Value& result,
1221 Error *error_ptr
1222) const
1223{
1224 if (IsLocationList())
1225 {
1226 uint32_t offset = 0;
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]1227 addr_t pc;
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]1228 StackFrame *frame = NULL;
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]1229 if (reg_ctx)
1230 pc = reg_ctx->GetPC();
1231 else
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]1232 {
1233 frame = exe_ctx->GetFramePtr();
Sean Callanan86106812012-03-10 03:03:46 +0000[diff] [blame]1234 if (!frame)
1235 return false;
1236 RegisterContextSP reg_ctx_sp = frame->GetRegisterContext();
1237 if (!reg_ctx_sp)
1238 return false;
1239 pc = reg_ctx_sp->GetPC();
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]1240 }
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1241
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1242 if (loclist_base_load_addr != LLDB_INVALID_ADDRESS)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1243 {
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1244 if (pc == LLDB_INVALID_ADDRESS)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1245 {
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1246 if (error_ptr)
1247 error_ptr->SetErrorString("Invalid PC in frame.");
1248 return false;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1249 }
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1250
1251 addr_t curr_loclist_base_load_addr = loclist_base_load_addr;
1252
1253 while (m_data.ValidOffset(offset))
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1254 {
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1255 // We need to figure out what the value is for the location.
1256 addr_t lo_pc = m_data.GetAddress(&offset);
1257 addr_t hi_pc = m_data.GetAddress(&offset);
1258 if (lo_pc == 0 && hi_pc == 0)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1259 {
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1260 break;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1261 }
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1262 else
1263 {
1264 lo_pc += curr_loclist_base_load_addr - m_loclist_slide;
1265 hi_pc += curr_loclist_base_load_addr - m_loclist_slide;
1266
1267 uint16_t length = m_data.GetU16(&offset);
1268
1269 if (length > 0 && lo_pc <= pc && pc < hi_pc)
1270 {
Greg Claytonbdcb6ab2011-01-25 23:55:37 +0000[diff] [blame]1271 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);
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1272 }
1273 offset += length;
1274 }
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1275 }
1276 }
1277 if (error_ptr)
Greg Clayton82f07462011-05-30 00:49:24 +0000[diff] [blame]1278 error_ptr->SetErrorString ("variable not available");
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1279 return false;
1280 }
1281
1282 // Not a location list, just a single expression.
Greg Claytonbdcb6ab2011-01-25 23:55:37 +0000[diff] [blame]1283 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);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1284}
1285
1286
1287
1288bool
1289DWARFExpression::Evaluate
1290(
1291 ExecutionContext *exe_ctx,
1292 clang::ASTContext *ast_context,
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1293 ClangExpressionVariableList *expr_locals,
1294 ClangExpressionDeclMap *decl_map,
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]1295 RegisterContext *reg_ctx,
Greg Claytonbdcb6ab2011-01-25 23:55:37 +0000[diff] [blame]1296 const DataExtractor& opcodes,
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1297 const uint32_t opcodes_offset,
1298 const uint32_t opcodes_length,
1299 const uint32_t reg_kind,
1300 const Value* initial_value_ptr,
1301 Value& result,
1302 Error *error_ptr
1303)
1304{
1305 std::vector<Value> stack;
1306
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]1307 Process *process = NULL;
1308 StackFrame *frame = NULL;
1309
1310 if (exe_ctx)
1311 {
1312 process = exe_ctx->GetProcessPtr();
1313 frame = exe_ctx->GetFramePtr();
1314 }
1315 if (reg_ctx == NULL && frame)
1316 reg_ctx = frame->GetRegisterContext().get();
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]1317
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1318 if (initial_value_ptr)
1319 stack.push_back(*initial_value_ptr);
1320
1321 uint32_t offset = opcodes_offset;
1322 const uint32_t end_offset = opcodes_offset + opcodes_length;
1323 Value tmp;
1324 uint32_t reg_num;
1325
1326 // Make sure all of the data is available in opcodes.
1327 if (!opcodes.ValidOffsetForDataOfSize(opcodes_offset, opcodes_length))
1328 {
1329 if (error_ptr)
1330 error_ptr->SetErrorString ("Invalid offset and/or length for opcodes buffer.");
1331 return false;
1332 }
Greg Claytone005f2c2010-11-06 01:53:30 +0000[diff] [blame]1333 LogSP log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1334
1335
1336 while (opcodes.ValidOffset(offset) && offset < end_offset)
1337 {
1338 const uint32_t op_offset = offset;
1339 const uint8_t op = opcodes.GetU8(&offset);
1340
Sean Callanan67bbb112011-10-14 20:34:21 +0000[diff] [blame]1341 if (log && log->GetVerbose())
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1342 {
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1343 size_t count = stack.size();
Jason Molenda7e5fa7f2011-09-20 21:44:10 +0000[diff] [blame]1344 log->Printf("Stack before operation has %lu values:", count);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1345 for (size_t i=0; i<count; ++i)
1346 {
1347 StreamString new_value;
Daniel Malea5f35a4b2012-11-29 21:49:15 +0000[diff] [blame]1348 new_value.Printf("[%" PRIu64 "]", (uint64_t)i);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1349 stack[i].Dump(&new_value);
Sean Callanan6184dfe2010-06-23 00:47:48 +0000[diff] [blame]1350 log->Printf(" %s", new_value.GetData());
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1351 }
1352 log->Printf("0x%8.8x: %s", op_offset, DW_OP_value_to_name(op));
1353 }
1354 switch (op)
1355 {
1356 //----------------------------------------------------------------------
1357 // The DW_OP_addr operation has a single operand that encodes a machine
1358 // address and whose size is the size of an address on the target machine.
1359 //----------------------------------------------------------------------
1360 case DW_OP_addr:
Greg Clayton801417e2011-07-07 01:59:51 +0000[diff] [blame]1361 stack.push_back(Scalar(opcodes.GetAddress(&offset)));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1362 stack.back().SetValueType (Value::eValueTypeFileAddress);
1363 break;
1364
1365 //----------------------------------------------------------------------
1366 // The DW_OP_addr_sect_offset4 is used for any location expressions in
1367 // shared libraries that have a location like:
1368 // DW_OP_addr(0x1000)
1369 // If this address resides in a shared library, then this virtual
1370 // address won't make sense when it is evaluated in the context of a
1371 // running process where shared libraries have been slid. To account for
1372 // this, this new address type where we can store the section pointer
1373 // and a 4 byte offset.
1374 //----------------------------------------------------------------------
1375// case DW_OP_addr_sect_offset4:
1376// {
1377// result_type = eResultTypeFileAddress;
1378// lldb::Section *sect = (lldb::Section *)opcodes.GetMaxU64(&offset, sizeof(void *));
1379// lldb::addr_t sect_offset = opcodes.GetU32(&offset);
1380//
1381// Address so_addr (sect, sect_offset);
1382// lldb::addr_t load_addr = so_addr.GetLoadAddress();
1383// if (load_addr != LLDB_INVALID_ADDRESS)
1384// {
1385// // We successfully resolve a file address to a load
1386// // address.
1387// stack.push_back(load_addr);
1388// break;
1389// }
1390// else
1391// {
1392// // We were able
1393// if (error_ptr)
1394// error_ptr->SetErrorStringWithFormat ("Section %s in %s is not currently loaded.\n", sect->GetName().AsCString(), sect->GetModule()->GetFileSpec().GetFilename().AsCString());
1395// return false;
1396// }
1397// }
1398// break;
1399
1400 //----------------------------------------------------------------------
1401 // OPCODE: DW_OP_deref
1402 // OPERANDS: none
1403 // DESCRIPTION: Pops the top stack entry and treats it as an address.
1404 // The value retrieved from that address is pushed. The size of the
1405 // data retrieved from the dereferenced address is the size of an
1406 // address on the target machine.
1407 //----------------------------------------------------------------------
1408 case DW_OP_deref:
1409 {
1410 Value::ValueType value_type = stack.back().GetValueType();
1411 switch (value_type)
1412 {
1413 case Value::eValueTypeHostAddress:
1414 {
1415 void *src = (void *)stack.back().GetScalar().ULongLong();
1416 intptr_t ptr;
1417 ::memcpy (&ptr, src, sizeof(void *));
1418 stack.back().GetScalar() = ptr;
1419 stack.back().ClearContext();
1420 }
1421 break;
1422 case Value::eValueTypeLoadAddress:
1423 if (exe_ctx)
1424 {
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]1425 if (process)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1426 {
1427 lldb::addr_t pointer_addr = stack.back().GetScalar().ULongLong(LLDB_INVALID_ADDRESS);
1428 uint8_t addr_bytes[sizeof(lldb::addr_t)];
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]1429 uint32_t addr_size = process->GetAddressByteSize();
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1430 Error error;
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]1431 if (process->ReadMemory(pointer_addr, &addr_bytes, addr_size, error) == addr_size)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1432 {
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]1433 DataExtractor addr_data(addr_bytes, sizeof(addr_bytes), process->GetByteOrder(), addr_size);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1434 uint32_t addr_data_offset = 0;
1435 stack.back().GetScalar() = addr_data.GetPointer(&addr_data_offset);
1436 stack.back().ClearContext();
1437 }
1438 else
1439 {
1440 if (error_ptr)
Daniel Malea5f35a4b2012-11-29 21:49:15 +0000[diff] [blame]1441 error_ptr->SetErrorStringWithFormat ("Failed to dereference pointer from 0x%" PRIx64 " for DW_OP_deref: %s\n",
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1442 pointer_addr,
1443 error.AsCString());
1444 return false;
1445 }
1446 }
1447 else
1448 {
1449 if (error_ptr)
1450 error_ptr->SetErrorStringWithFormat ("NULL process for DW_OP_deref.\n");
1451 return false;
1452 }
1453 }
1454 else
1455 {
1456 if (error_ptr)
1457 error_ptr->SetErrorStringWithFormat ("NULL execution context for DW_OP_deref.\n");
1458 return false;
1459 }
1460 break;
1461
1462 default:
1463 break;
1464 }
1465
1466 }
1467 break;
1468
1469 //----------------------------------------------------------------------
1470 // OPCODE: DW_OP_deref_size
1471 // OPERANDS: 1
1472 // 1 - uint8_t that specifies the size of the data to dereference.
1473 // DESCRIPTION: Behaves like the DW_OP_deref operation: it pops the top
1474 // stack entry and treats it as an address. The value retrieved from that
1475 // address is pushed. In the DW_OP_deref_size operation, however, the
1476 // size in bytes of the data retrieved from the dereferenced address is
1477 // specified by the single operand. This operand is a 1-byte unsigned
1478 // integral constant whose value may not be larger than the size of an
1479 // address on the target machine. The data retrieved is zero extended
1480 // to the size of an address on the target machine before being pushed
1481 // on the expression stack.
1482 //----------------------------------------------------------------------
1483 case DW_OP_deref_size:
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]1484 {
1485 uint8_t size = opcodes.GetU8(&offset);
1486 Value::ValueType value_type = stack.back().GetValueType();
1487 switch (value_type)
1488 {
1489 case Value::eValueTypeHostAddress:
1490 {
1491 void *src = (void *)stack.back().GetScalar().ULongLong();
1492 intptr_t ptr;
1493 ::memcpy (&ptr, src, sizeof(void *));
1494 // I can't decide whether the size operand should apply to the bytes in their
1495 // lldb-host endianness or the target endianness.. I doubt this'll ever come up
1496 // but I'll opt for assuming big endian regardless.
1497 switch (size)
1498 {
1499 case 1: ptr = ptr & 0xff; break;
1500 case 2: ptr = ptr & 0xffff; break;
1501 case 3: ptr = ptr & 0xffffff; break;
1502 case 4: ptr = ptr & 0xffffffff; break;
Jason Molendaa99bcaa2010-11-29 21:38:58 +0000[diff] [blame]1503 // the casts are added to work around the case where intptr_t is a 32 bit quantity;
1504 // presumably we won't hit the 5..7 cases if (void*) is 32-bits in this program.
1505 case 5: ptr = (intptr_t) ptr & 0xffffffffffULL; break;
1506 case 6: ptr = (intptr_t) ptr & 0xffffffffffffULL; break;
1507 case 7: ptr = (intptr_t) ptr & 0xffffffffffffffULL; break;
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]1508 default: break;
1509 }
1510 stack.back().GetScalar() = ptr;
1511 stack.back().ClearContext();
1512 }
1513 break;
1514 case Value::eValueTypeLoadAddress:
1515 if (exe_ctx)
1516 {
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]1517 if (process)
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]1518 {
1519 lldb::addr_t pointer_addr = stack.back().GetScalar().ULongLong(LLDB_INVALID_ADDRESS);
1520 uint8_t addr_bytes[sizeof(lldb::addr_t)];
1521 Error error;
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]1522 if (process->ReadMemory(pointer_addr, &addr_bytes, size, error) == size)
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]1523 {
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]1524 DataExtractor addr_data(addr_bytes, sizeof(addr_bytes), process->GetByteOrder(), size);
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]1525 uint32_t addr_data_offset = 0;
1526 switch (size)
1527 {
1528 case 1: stack.back().GetScalar() = addr_data.GetU8(&addr_data_offset); break;
1529 case 2: stack.back().GetScalar() = addr_data.GetU16(&addr_data_offset); break;
1530 case 4: stack.back().GetScalar() = addr_data.GetU32(&addr_data_offset); break;
1531 case 8: stack.back().GetScalar() = addr_data.GetU64(&addr_data_offset); break;
1532 default: stack.back().GetScalar() = addr_data.GetPointer(&addr_data_offset);
1533 }
1534 stack.back().ClearContext();
1535 }
1536 else
1537 {
1538 if (error_ptr)
Daniel Malea5f35a4b2012-11-29 21:49:15 +0000[diff] [blame]1539 error_ptr->SetErrorStringWithFormat ("Failed to dereference pointer from 0x%" PRIx64 " for DW_OP_deref: %s\n",
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]1540 pointer_addr,
1541 error.AsCString());
1542 return false;
1543 }
1544 }
1545 else
1546 {
1547 if (error_ptr)
1548 error_ptr->SetErrorStringWithFormat ("NULL process for DW_OP_deref.\n");
1549 return false;
1550 }
1551 }
1552 else
1553 {
1554 if (error_ptr)
1555 error_ptr->SetErrorStringWithFormat ("NULL execution context for DW_OP_deref.\n");
1556 return false;
1557 }
1558 break;
1559
1560 default:
1561 break;
1562 }
1563
1564 }
1565 break;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1566
1567 //----------------------------------------------------------------------
1568 // OPCODE: DW_OP_xderef_size
1569 // OPERANDS: 1
1570 // 1 - uint8_t that specifies the size of the data to dereference.
1571 // DESCRIPTION: Behaves like the DW_OP_xderef operation: the entry at
1572 // the top of the stack is treated as an address. The second stack
Greg Clayton33ed1702010-08-24 00:45:41 +0000[diff] [blame]1573 // entry is treated as an "address space identifier" for those
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1574 // architectures that support multiple address spaces. The top two
1575 // stack elements are popped, a data item is retrieved through an
1576 // implementation-defined address calculation and pushed as the new
1577 // stack top. In the DW_OP_xderef_size operation, however, the size in
1578 // bytes of the data retrieved from the dereferenced address is
1579 // specified by the single operand. This operand is a 1-byte unsigned
1580 // integral constant whose value may not be larger than the size of an
1581 // address on the target machine. The data retrieved is zero extended
1582 // to the size of an address on the target machine before being pushed
1583 // on the expression stack.
1584 //----------------------------------------------------------------------
1585 case DW_OP_xderef_size:
1586 if (error_ptr)
1587 error_ptr->SetErrorString("Unimplemented opcode: DW_OP_xderef_size.");
1588 return false;
1589 //----------------------------------------------------------------------
1590 // OPCODE: DW_OP_xderef
1591 // OPERANDS: none
1592 // DESCRIPTION: Provides an extended dereference mechanism. The entry at
1593 // the top of the stack is treated as an address. The second stack entry
1594 // is treated as an "address space identifier" for those architectures
1595 // that support multiple address spaces. The top two stack elements are
1596 // popped, a data item is retrieved through an implementation-defined
1597 // address calculation and pushed as the new stack top. The size of the
1598 // data retrieved from the dereferenced address is the size of an address
1599 // on the target machine.
1600 //----------------------------------------------------------------------
1601 case DW_OP_xderef:
1602 if (error_ptr)
1603 error_ptr->SetErrorString("Unimplemented opcode: DW_OP_xderef.");
1604 return false;
1605
1606 //----------------------------------------------------------------------
1607 // All DW_OP_constXXX opcodes have a single operand as noted below:
1608 //
1609 // Opcode Operand 1
1610 // --------------- ----------------------------------------------------
1611 // DW_OP_const1u 1-byte unsigned integer constant
1612 // DW_OP_const1s 1-byte signed integer constant
1613 // DW_OP_const2u 2-byte unsigned integer constant
1614 // DW_OP_const2s 2-byte signed integer constant
1615 // DW_OP_const4u 4-byte unsigned integer constant
1616 // DW_OP_const4s 4-byte signed integer constant
1617 // DW_OP_const8u 8-byte unsigned integer constant
1618 // DW_OP_const8s 8-byte signed integer constant
1619 // DW_OP_constu unsigned LEB128 integer constant
1620 // DW_OP_consts signed LEB128 integer constant
1621 //----------------------------------------------------------------------
Greg Clayton801417e2011-07-07 01:59:51 +0000[diff] [blame]1622 case DW_OP_const1u : stack.push_back(Scalar(( uint8_t)opcodes.GetU8 (&offset))); break;
1623 case DW_OP_const1s : stack.push_back(Scalar(( int8_t)opcodes.GetU8 (&offset))); break;
1624 case DW_OP_const2u : stack.push_back(Scalar((uint16_t)opcodes.GetU16 (&offset))); break;
1625 case DW_OP_const2s : stack.push_back(Scalar(( int16_t)opcodes.GetU16 (&offset))); break;
1626 case DW_OP_const4u : stack.push_back(Scalar((uint32_t)opcodes.GetU32 (&offset))); break;
1627 case DW_OP_const4s : stack.push_back(Scalar(( int32_t)opcodes.GetU32 (&offset))); break;
1628 case DW_OP_const8u : stack.push_back(Scalar((uint64_t)opcodes.GetU64 (&offset))); break;
1629 case DW_OP_const8s : stack.push_back(Scalar(( int64_t)opcodes.GetU64 (&offset))); break;
1630 case DW_OP_constu : stack.push_back(Scalar(opcodes.GetULEB128 (&offset))); break;
1631 case DW_OP_consts : stack.push_back(Scalar(opcodes.GetSLEB128 (&offset))); break;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1632
1633 //----------------------------------------------------------------------
1634 // OPCODE: DW_OP_dup
1635 // OPERANDS: none
1636 // DESCRIPTION: duplicates the value at the top of the stack
1637 //----------------------------------------------------------------------
1638 case DW_OP_dup:
1639 if (stack.empty())
1640 {
1641 if (error_ptr)
1642 error_ptr->SetErrorString("Expression stack empty for DW_OP_dup.");
1643 return false;
1644 }
1645 else
1646 stack.push_back(stack.back());
1647 break;
1648
1649 //----------------------------------------------------------------------
1650 // OPCODE: DW_OP_drop
1651 // OPERANDS: none
1652 // DESCRIPTION: pops the value at the top of the stack
1653 //----------------------------------------------------------------------
1654 case DW_OP_drop:
1655 if (stack.empty())
1656 {
1657 if (error_ptr)
1658 error_ptr->SetErrorString("Expression stack empty for DW_OP_drop.");
1659 return false;
1660 }
1661 else
1662 stack.pop_back();
1663 break;
1664
1665 //----------------------------------------------------------------------
1666 // OPCODE: DW_OP_over
1667 // OPERANDS: none
1668 // DESCRIPTION: Duplicates the entry currently second in the stack at
1669 // the top of the stack.
1670 //----------------------------------------------------------------------
1671 case DW_OP_over:
1672 if (stack.size() < 2)
1673 {
1674 if (error_ptr)
1675 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_over.");
1676 return false;
1677 }
1678 else
1679 stack.push_back(stack[stack.size() - 2]);
1680 break;
1681
1682
1683 //----------------------------------------------------------------------
1684 // OPCODE: DW_OP_pick
1685 // OPERANDS: uint8_t index into the current stack
1686 // DESCRIPTION: The stack entry with the specified index (0 through 255,
1687 // inclusive) is pushed on the stack
1688 //----------------------------------------------------------------------
1689 case DW_OP_pick:
1690 {
1691 uint8_t pick_idx = opcodes.GetU8(&offset);
1692 if (pick_idx < stack.size())
1693 stack.push_back(stack[pick_idx]);
1694 else
1695 {
1696 if (error_ptr)
1697 error_ptr->SetErrorStringWithFormat("Index %u out of range for DW_OP_pick.\n", pick_idx);
1698 return false;
1699 }
1700 }
1701 break;
1702
1703 //----------------------------------------------------------------------
1704 // OPCODE: DW_OP_swap
1705 // OPERANDS: none
1706 // DESCRIPTION: swaps the top two stack entries. The entry at the top
1707 // of the stack becomes the second stack entry, and the second entry
1708 // becomes the top of the stack
1709 //----------------------------------------------------------------------
1710 case DW_OP_swap:
1711 if (stack.size() < 2)
1712 {
1713 if (error_ptr)
1714 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_swap.");
1715 return false;
1716 }
1717 else
1718 {
1719 tmp = stack.back();
1720 stack.back() = stack[stack.size() - 2];
1721 stack[stack.size() - 2] = tmp;
1722 }
1723 break;
1724
1725 //----------------------------------------------------------------------
1726 // OPCODE: DW_OP_rot
1727 // OPERANDS: none
1728 // DESCRIPTION: Rotates the first three stack entries. The entry at
1729 // the top of the stack becomes the third stack entry, the second
1730 // entry becomes the top of the stack, and the third entry becomes
1731 // the second entry.
1732 //----------------------------------------------------------------------
1733 case DW_OP_rot:
1734 if (stack.size() < 3)
1735 {
1736 if (error_ptr)
1737 error_ptr->SetErrorString("Expression stack needs at least 3 items for DW_OP_rot.");
1738 return false;
1739 }
1740 else
1741 {
1742 size_t last_idx = stack.size() - 1;
1743 Value old_top = stack[last_idx];
1744 stack[last_idx] = stack[last_idx - 1];
1745 stack[last_idx - 1] = stack[last_idx - 2];
1746 stack[last_idx - 2] = old_top;
1747 }
1748 break;
1749
1750 //----------------------------------------------------------------------
1751 // OPCODE: DW_OP_abs
1752 // OPERANDS: none
1753 // DESCRIPTION: pops the top stack entry, interprets it as a signed
1754 // value and pushes its absolute value. If the absolute value can not be
1755 // represented, the result is undefined.
1756 //----------------------------------------------------------------------
1757 case DW_OP_abs:
1758 if (stack.empty())
1759 {
1760 if (error_ptr)
1761 error_ptr->SetErrorString("Expression stack needs at least 1 item for DW_OP_abs.");
1762 return false;
1763 }
1764 else if (stack.back().ResolveValue(exe_ctx, ast_context).AbsoluteValue() == false)
1765 {
1766 if (error_ptr)
1767 error_ptr->SetErrorString("Failed to take the absolute value of the first stack item.");
1768 return false;
1769 }
1770 break;
1771
1772 //----------------------------------------------------------------------
1773 // OPCODE: DW_OP_and
1774 // OPERANDS: none
1775 // DESCRIPTION: pops the top two stack values, performs a bitwise and
1776 // operation on the two, and pushes the result.
1777 //----------------------------------------------------------------------
1778 case DW_OP_and:
1779 if (stack.size() < 2)
1780 {
1781 if (error_ptr)
1782 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_and.");
1783 return false;
1784 }
1785 else
1786 {
1787 tmp = stack.back();
1788 stack.pop_back();
1789 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) & tmp.ResolveValue(exe_ctx, ast_context);
1790 }
1791 break;
1792
1793 //----------------------------------------------------------------------
1794 // OPCODE: DW_OP_div
1795 // OPERANDS: none
1796 // DESCRIPTION: pops the top two stack values, divides the former second
1797 // entry by the former top of the stack using signed division, and
1798 // pushes the result.
1799 //----------------------------------------------------------------------
1800 case DW_OP_div:
1801 if (stack.size() < 2)
1802 {
1803 if (error_ptr)
1804 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_div.");
1805 return false;
1806 }
1807 else
1808 {
1809 tmp = stack.back();
1810 if (tmp.ResolveValue(exe_ctx, ast_context).IsZero())
1811 {
1812 if (error_ptr)
1813 error_ptr->SetErrorString("Divide by zero.");
1814 return false;
1815 }
1816 else
1817 {
1818 stack.pop_back();
1819 stack.back() = stack.back().ResolveValue(exe_ctx, ast_context) / tmp.ResolveValue(exe_ctx, ast_context);
1820 if (!stack.back().ResolveValue(exe_ctx, ast_context).IsValid())
1821 {
1822 if (error_ptr)
1823 error_ptr->SetErrorString("Divide failed.");
1824 return false;
1825 }
1826 }
1827 }
1828 break;
1829
1830 //----------------------------------------------------------------------
1831 // OPCODE: DW_OP_minus
1832 // OPERANDS: none
1833 // DESCRIPTION: pops the top two stack values, subtracts the former top
1834 // of the stack from the former second entry, and pushes the result.
1835 //----------------------------------------------------------------------
1836 case DW_OP_minus:
1837 if (stack.size() < 2)
1838 {
1839 if (error_ptr)
1840 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_minus.");
1841 return false;
1842 }
1843 else
1844 {
1845 tmp = stack.back();
1846 stack.pop_back();
1847 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) - tmp.ResolveValue(exe_ctx, ast_context);
1848 }
1849 break;
1850
1851 //----------------------------------------------------------------------
1852 // OPCODE: DW_OP_mod
1853 // OPERANDS: none
1854 // DESCRIPTION: pops the top two stack values and pushes the result of
1855 // the calculation: former second stack entry modulo the former top of
1856 // the stack.
1857 //----------------------------------------------------------------------
1858 case DW_OP_mod:
1859 if (stack.size() < 2)
1860 {
1861 if (error_ptr)
1862 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_mod.");
1863 return false;
1864 }
1865 else
1866 {
1867 tmp = stack.back();
1868 stack.pop_back();
1869 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) % tmp.ResolveValue(exe_ctx, ast_context);
1870 }
1871 break;
1872
1873
1874 //----------------------------------------------------------------------
1875 // OPCODE: DW_OP_mul
1876 // OPERANDS: none
1877 // DESCRIPTION: pops the top two stack entries, multiplies them
1878 // together, and pushes the result.
1879 //----------------------------------------------------------------------
1880 case DW_OP_mul:
1881 if (stack.size() < 2)
1882 {
1883 if (error_ptr)
1884 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_mul.");
1885 return false;
1886 }
1887 else
1888 {
1889 tmp = stack.back();
1890 stack.pop_back();
1891 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) * tmp.ResolveValue(exe_ctx, ast_context);
1892 }
1893 break;
1894
1895 //----------------------------------------------------------------------
1896 // OPCODE: DW_OP_neg
1897 // OPERANDS: none
1898 // DESCRIPTION: pops the top stack entry, and pushes its negation.
1899 //----------------------------------------------------------------------
1900 case DW_OP_neg:
1901 if (stack.empty())
1902 {
1903 if (error_ptr)
1904 error_ptr->SetErrorString("Expression stack needs at least 1 item for DW_OP_neg.");
1905 return false;
1906 }
1907 else
1908 {
1909 if (stack.back().ResolveValue(exe_ctx, ast_context).UnaryNegate() == false)
1910 {
1911 if (error_ptr)
1912 error_ptr->SetErrorString("Unary negate failed.");
1913 return false;
1914 }
1915 }
1916 break;
1917
1918 //----------------------------------------------------------------------
1919 // OPCODE: DW_OP_not
1920 // OPERANDS: none
1921 // DESCRIPTION: pops the top stack entry, and pushes its bitwise
1922 // complement
1923 //----------------------------------------------------------------------
1924 case DW_OP_not:
1925 if (stack.empty())
1926 {
1927 if (error_ptr)
1928 error_ptr->SetErrorString("Expression stack needs at least 1 item for DW_OP_not.");
1929 return false;
1930 }
1931 else
1932 {
1933 if (stack.back().ResolveValue(exe_ctx, ast_context).OnesComplement() == false)
1934 {
1935 if (error_ptr)
1936 error_ptr->SetErrorString("Logical NOT failed.");
1937 return false;
1938 }
1939 }
1940 break;
1941
1942 //----------------------------------------------------------------------
1943 // OPCODE: DW_OP_or
1944 // OPERANDS: none
1945 // DESCRIPTION: pops the top two stack entries, performs a bitwise or
1946 // operation on the two, and pushes the result.
1947 //----------------------------------------------------------------------
1948 case DW_OP_or:
1949 if (stack.size() < 2)
1950 {
1951 if (error_ptr)
1952 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_or.");
1953 return false;
1954 }
1955 else
1956 {
1957 tmp = stack.back();
1958 stack.pop_back();
1959 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) | tmp.ResolveValue(exe_ctx, ast_context);
1960 }
1961 break;
1962
1963 //----------------------------------------------------------------------
1964 // OPCODE: DW_OP_plus
1965 // OPERANDS: none
1966 // DESCRIPTION: pops the top two stack entries, adds them together, and
1967 // pushes the result.
1968 //----------------------------------------------------------------------
1969 case DW_OP_plus:
1970 if (stack.size() < 2)
1971 {
1972 if (error_ptr)
1973 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_plus.");
1974 return false;
1975 }
1976 else
1977 {
1978 tmp = stack.back();
1979 stack.pop_back();
1980 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) + tmp.ResolveValue(exe_ctx, ast_context);
1981 }
1982 break;
1983
1984 //----------------------------------------------------------------------
1985 // OPCODE: DW_OP_plus_uconst
1986 // OPERANDS: none
1987 // DESCRIPTION: pops the top stack entry, adds it to the unsigned LEB128
1988 // constant operand and pushes the result.
1989 //----------------------------------------------------------------------
1990 case DW_OP_plus_uconst:
1991 if (stack.empty())
1992 {
1993 if (error_ptr)
1994 error_ptr->SetErrorString("Expression stack needs at least 1 item for DW_OP_plus_uconst.");
1995 return false;
1996 }
1997 else
1998 {
1999 uint32_t uconst_value = opcodes.GetULEB128(&offset);
2000 // Implicit conversion from a UINT to a Scalar...
2001 stack.back().ResolveValue(exe_ctx, ast_context) += uconst_value;
2002 if (!stack.back().ResolveValue(exe_ctx, ast_context).IsValid())
2003 {
2004 if (error_ptr)
2005 error_ptr->SetErrorString("DW_OP_plus_uconst failed.");
2006 return false;
2007 }
2008 }
2009 break;
2010
2011 //----------------------------------------------------------------------
2012 // OPCODE: DW_OP_shl
2013 // OPERANDS: none
2014 // DESCRIPTION: pops the top two stack entries, shifts the former
2015 // second entry left by the number of bits specified by the former top
2016 // of the stack, and pushes the result.
2017 //----------------------------------------------------------------------
2018 case DW_OP_shl:
2019 if (stack.size() < 2)
2020 {
2021 if (error_ptr)
2022 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_shl.");
2023 return false;
2024 }
2025 else
2026 {
2027 tmp = stack.back();
2028 stack.pop_back();
2029 stack.back().ResolveValue(exe_ctx, ast_context) <<= tmp.ResolveValue(exe_ctx, ast_context);
2030 }
2031 break;
2032
2033 //----------------------------------------------------------------------
2034 // OPCODE: DW_OP_shr
2035 // OPERANDS: none
2036 // DESCRIPTION: pops the top two stack entries, shifts the former second
2037 // entry right logically (filling with zero bits) by the number of bits
2038 // specified by the former top of the stack, and pushes the result.
2039 //----------------------------------------------------------------------
2040 case DW_OP_shr:
2041 if (stack.size() < 2)
2042 {
2043 if (error_ptr)
2044 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_shr.");
2045 return false;
2046 }
2047 else
2048 {
2049 tmp = stack.back();
2050 stack.pop_back();
2051 if (stack.back().ResolveValue(exe_ctx, ast_context).ShiftRightLogical(tmp.ResolveValue(exe_ctx, ast_context)) == false)
2052 {
2053 if (error_ptr)
2054 error_ptr->SetErrorString("DW_OP_shr failed.");
2055 return false;
2056 }
2057 }
2058 break;
2059
2060 //----------------------------------------------------------------------
2061 // OPCODE: DW_OP_shra
2062 // OPERANDS: none
2063 // DESCRIPTION: pops the top two stack entries, shifts the former second
2064 // entry right arithmetically (divide the magnitude by 2, keep the same
2065 // sign for the result) by the number of bits specified by the former
2066 // top of the stack, and pushes the result.
2067 //----------------------------------------------------------------------
2068 case DW_OP_shra:
2069 if (stack.size() < 2)
2070 {
2071 if (error_ptr)
2072 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_shra.");
2073 return false;
2074 }
2075 else
2076 {
2077 tmp = stack.back();
2078 stack.pop_back();
2079 stack.back().ResolveValue(exe_ctx, ast_context) >>= tmp.ResolveValue(exe_ctx, ast_context);
2080 }
2081 break;
2082
2083 //----------------------------------------------------------------------
2084 // OPCODE: DW_OP_xor
2085 // OPERANDS: none
2086 // DESCRIPTION: pops the top two stack entries, performs the bitwise
2087 // exclusive-or operation on the two, and pushes the result.
2088 //----------------------------------------------------------------------
2089 case DW_OP_xor:
2090 if (stack.size() < 2)
2091 {
2092 if (error_ptr)
2093 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_xor.");
2094 return false;
2095 }
2096 else
2097 {
2098 tmp = stack.back();
2099 stack.pop_back();
2100 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) ^ tmp.ResolveValue(exe_ctx, ast_context);
2101 }
2102 break;
2103
2104
2105 //----------------------------------------------------------------------
2106 // OPCODE: DW_OP_skip
2107 // OPERANDS: int16_t
2108 // DESCRIPTION: An unconditional branch. Its single operand is a 2-byte
2109 // signed integer constant. The 2-byte constant is the number of bytes
2110 // of the DWARF expression to skip forward or backward from the current
2111 // operation, beginning after the 2-byte constant.
2112 //----------------------------------------------------------------------
2113 case DW_OP_skip:
2114 {
2115 int16_t skip_offset = (int16_t)opcodes.GetU16(&offset);
2116 uint32_t new_offset = offset + skip_offset;
2117 if (new_offset >= opcodes_offset && new_offset < end_offset)
2118 offset = new_offset;
2119 else
2120 {
2121 if (error_ptr)
2122 error_ptr->SetErrorString("Invalid opcode offset in DW_OP_skip.");
2123 return false;
2124 }
2125 }
2126 break;
2127
2128 //----------------------------------------------------------------------
2129 // OPCODE: DW_OP_bra
2130 // OPERANDS: int16_t
2131 // DESCRIPTION: A conditional branch. Its single operand is a 2-byte
2132 // signed integer constant. This operation pops the top of stack. If
2133 // the value popped is not the constant 0, the 2-byte constant operand
2134 // is the number of bytes of the DWARF expression to skip forward or
2135 // backward from the current operation, beginning after the 2-byte
2136 // constant.
2137 //----------------------------------------------------------------------
2138 case DW_OP_bra:
2139 {
2140 tmp = stack.back();
2141 stack.pop_back();
2142 int16_t bra_offset = (int16_t)opcodes.GetU16(&offset);
2143 Scalar zero(0);
2144 if (tmp.ResolveValue(exe_ctx, ast_context) != zero)
2145 {
2146 uint32_t new_offset = offset + bra_offset;
2147 if (new_offset >= opcodes_offset && new_offset < end_offset)
2148 offset = new_offset;
2149 else
2150 {
2151 if (error_ptr)
2152 error_ptr->SetErrorString("Invalid opcode offset in DW_OP_bra.");
2153 return false;
2154 }
2155 }
2156 }
2157 break;
2158
2159 //----------------------------------------------------------------------
2160 // OPCODE: DW_OP_eq
2161 // OPERANDS: none
2162 // DESCRIPTION: pops the top two stack values, compares using the
2163 // equals (==) operator.
2164 // STACK RESULT: push the constant value 1 onto the stack if the result
2165 // of the operation is true or the constant value 0 if the result of the
2166 // operation is false.
2167 //----------------------------------------------------------------------
2168 case DW_OP_eq:
2169 if (stack.size() < 2)
2170 {
2171 if (error_ptr)
2172 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_eq.");
2173 return false;
2174 }
2175 else
2176 {
2177 tmp = stack.back();
2178 stack.pop_back();
2179 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) == tmp.ResolveValue(exe_ctx, ast_context);
2180 }
2181 break;
2182
2183 //----------------------------------------------------------------------
2184 // OPCODE: DW_OP_ge
2185 // OPERANDS: none
2186 // DESCRIPTION: pops the top two stack values, compares using the
2187 // greater than or equal to (>=) operator.
2188 // STACK RESULT: push the constant value 1 onto the stack if the result
2189 // of the operation is true or the constant value 0 if the result of the
2190 // operation is false.
2191 //----------------------------------------------------------------------
2192 case DW_OP_ge:
2193 if (stack.size() < 2)
2194 {
2195 if (error_ptr)
2196 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_ge.");
2197 return false;
2198 }
2199 else
2200 {
2201 tmp = stack.back();
2202 stack.pop_back();
2203 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) >= tmp.ResolveValue(exe_ctx, ast_context);
2204 }
2205 break;
2206
2207 //----------------------------------------------------------------------
2208 // OPCODE: DW_OP_gt
2209 // OPERANDS: none
2210 // DESCRIPTION: pops the top two stack values, compares using the
2211 // greater than (>) operator.
2212 // STACK RESULT: push the constant value 1 onto the stack if the result
2213 // of the operation is true or the constant value 0 if the result of the
2214 // operation is false.
2215 //----------------------------------------------------------------------
2216 case DW_OP_gt:
2217 if (stack.size() < 2)
2218 {
2219 if (error_ptr)
2220 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_gt.");
2221 return false;
2222 }
2223 else
2224 {
2225 tmp = stack.back();
2226 stack.pop_back();
2227 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) > tmp.ResolveValue(exe_ctx, ast_context);
2228 }
2229 break;
2230
2231 //----------------------------------------------------------------------
2232 // OPCODE: DW_OP_le
2233 // OPERANDS: none
2234 // DESCRIPTION: pops the top two stack values, compares using the
2235 // less than or equal to (<=) operator.
2236 // STACK RESULT: push the constant value 1 onto the stack if the result
2237 // of the operation is true or the constant value 0 if the result of the
2238 // operation is false.
2239 //----------------------------------------------------------------------
2240 case DW_OP_le:
2241 if (stack.size() < 2)
2242 {
2243 if (error_ptr)
2244 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_le.");
2245 return false;
2246 }
2247 else
2248 {
2249 tmp = stack.back();
2250 stack.pop_back();
2251 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) <= tmp.ResolveValue(exe_ctx, ast_context);
2252 }
2253 break;
2254
2255 //----------------------------------------------------------------------
2256 // OPCODE: DW_OP_lt
2257 // OPERANDS: none
2258 // DESCRIPTION: pops the top two stack values, compares using the
2259 // less than (<) operator.
2260 // STACK RESULT: push the constant value 1 onto the stack if the result
2261 // of the operation is true or the constant value 0 if the result of the
2262 // operation is false.
2263 //----------------------------------------------------------------------
2264 case DW_OP_lt:
2265 if (stack.size() < 2)
2266 {
2267 if (error_ptr)
2268 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_lt.");
2269 return false;
2270 }
2271 else
2272 {
2273 tmp = stack.back();
2274 stack.pop_back();
2275 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) < tmp.ResolveValue(exe_ctx, ast_context);
2276 }
2277 break;
2278
2279 //----------------------------------------------------------------------
2280 // OPCODE: DW_OP_ne
2281 // OPERANDS: none
2282 // DESCRIPTION: pops the top two stack values, compares using the
2283 // not equal (!=) operator.
2284 // STACK RESULT: push the constant value 1 onto the stack if the result
2285 // of the operation is true or the constant value 0 if the result of the
2286 // operation is false.
2287 //----------------------------------------------------------------------
2288 case DW_OP_ne:
2289 if (stack.size() < 2)
2290 {
2291 if (error_ptr)
2292 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_ne.");
2293 return false;
2294 }
2295 else
2296 {
2297 tmp = stack.back();
2298 stack.pop_back();
2299 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) != tmp.ResolveValue(exe_ctx, ast_context);
2300 }
2301 break;
2302
2303 //----------------------------------------------------------------------
2304 // OPCODE: DW_OP_litn
2305 // OPERANDS: none
2306 // DESCRIPTION: encode the unsigned literal values from 0 through 31.
2307 // STACK RESULT: push the unsigned literal constant value onto the top
2308 // of the stack.
2309 //----------------------------------------------------------------------
2310 case DW_OP_lit0:
2311 case DW_OP_lit1:
2312 case DW_OP_lit2:
2313 case DW_OP_lit3:
2314 case DW_OP_lit4:
2315 case DW_OP_lit5:
2316 case DW_OP_lit6:
2317 case DW_OP_lit7:
2318 case DW_OP_lit8:
2319 case DW_OP_lit9:
2320 case DW_OP_lit10:
2321 case DW_OP_lit11:
2322 case DW_OP_lit12:
2323 case DW_OP_lit13:
2324 case DW_OP_lit14:
2325 case DW_OP_lit15:
2326 case DW_OP_lit16:
2327 case DW_OP_lit17:
2328 case DW_OP_lit18:
2329 case DW_OP_lit19:
2330 case DW_OP_lit20:
2331 case DW_OP_lit21:
2332 case DW_OP_lit22:
2333 case DW_OP_lit23:
2334 case DW_OP_lit24:
2335 case DW_OP_lit25:
2336 case DW_OP_lit26:
2337 case DW_OP_lit27:
2338 case DW_OP_lit28:
2339 case DW_OP_lit29:
2340 case DW_OP_lit30:
2341 case DW_OP_lit31:
Greg Clayton801417e2011-07-07 01:59:51 +0000[diff] [blame]2342 stack.push_back(Scalar(op - DW_OP_lit0));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2343 break;
2344
2345 //----------------------------------------------------------------------
2346 // OPCODE: DW_OP_regN
2347 // OPERANDS: none
2348 // DESCRIPTION: Push the value in register n on the top of the stack.
2349 //----------------------------------------------------------------------
2350 case DW_OP_reg0:
2351 case DW_OP_reg1:
2352 case DW_OP_reg2:
2353 case DW_OP_reg3:
2354 case DW_OP_reg4:
2355 case DW_OP_reg5:
2356 case DW_OP_reg6:
2357 case DW_OP_reg7:
2358 case DW_OP_reg8:
2359 case DW_OP_reg9:
2360 case DW_OP_reg10:
2361 case DW_OP_reg11:
2362 case DW_OP_reg12:
2363 case DW_OP_reg13:
2364 case DW_OP_reg14:
2365 case DW_OP_reg15:
2366 case DW_OP_reg16:
2367 case DW_OP_reg17:
2368 case DW_OP_reg18:
2369 case DW_OP_reg19:
2370 case DW_OP_reg20:
2371 case DW_OP_reg21:
2372 case DW_OP_reg22:
2373 case DW_OP_reg23:
2374 case DW_OP_reg24:
2375 case DW_OP_reg25:
2376 case DW_OP_reg26:
2377 case DW_OP_reg27:
2378 case DW_OP_reg28:
2379 case DW_OP_reg29:
2380 case DW_OP_reg30:
2381 case DW_OP_reg31:
2382 {
2383 reg_num = op - DW_OP_reg0;
2384
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]2385 if (ReadRegisterValueAsScalar (reg_ctx, reg_kind, reg_num, error_ptr, tmp))
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2386 stack.push_back(tmp);
2387 else
2388 return false;
2389 }
2390 break;
2391 //----------------------------------------------------------------------
2392 // OPCODE: DW_OP_regx
2393 // OPERANDS:
2394 // ULEB128 literal operand that encodes the register.
2395 // DESCRIPTION: Push the value in register on the top of the stack.
2396 //----------------------------------------------------------------------
2397 case DW_OP_regx:
2398 {
2399 reg_num = opcodes.GetULEB128(&offset);
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]2400 if (ReadRegisterValueAsScalar (reg_ctx, reg_kind, reg_num, error_ptr, tmp))
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2401 stack.push_back(tmp);
2402 else
2403 return false;
2404 }
2405 break;
2406
2407 //----------------------------------------------------------------------
2408 // OPCODE: DW_OP_bregN
2409 // OPERANDS:
2410 // SLEB128 offset from register N
2411 // DESCRIPTION: Value is in memory at the address specified by register
2412 // N plus an offset.
2413 //----------------------------------------------------------------------
2414 case DW_OP_breg0:
2415 case DW_OP_breg1:
2416 case DW_OP_breg2:
2417 case DW_OP_breg3:
2418 case DW_OP_breg4:
2419 case DW_OP_breg5:
2420 case DW_OP_breg6:
2421 case DW_OP_breg7:
2422 case DW_OP_breg8:
2423 case DW_OP_breg9:
2424 case DW_OP_breg10:
2425 case DW_OP_breg11:
2426 case DW_OP_breg12:
2427 case DW_OP_breg13:
2428 case DW_OP_breg14:
2429 case DW_OP_breg15:
2430 case DW_OP_breg16:
2431 case DW_OP_breg17:
2432 case DW_OP_breg18:
2433 case DW_OP_breg19:
2434 case DW_OP_breg20:
2435 case DW_OP_breg21:
2436 case DW_OP_breg22:
2437 case DW_OP_breg23:
2438 case DW_OP_breg24:
2439 case DW_OP_breg25:
2440 case DW_OP_breg26:
2441 case DW_OP_breg27:
2442 case DW_OP_breg28:
2443 case DW_OP_breg29:
2444 case DW_OP_breg30:
2445 case DW_OP_breg31:
2446 {
2447 reg_num = op - DW_OP_breg0;
2448
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]2449 if (ReadRegisterValueAsScalar (reg_ctx, reg_kind, reg_num, error_ptr, tmp))
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2450 {
2451 int64_t breg_offset = opcodes.GetSLEB128(&offset);
2452 tmp.ResolveValue(exe_ctx, ast_context) += (uint64_t)breg_offset;
Sean Callanan6fc5c712012-01-06 18:24:47 +0000[diff] [blame]2453 tmp.ClearContext();
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2454 stack.push_back(tmp);
2455 stack.back().SetValueType (Value::eValueTypeLoadAddress);
2456 }
2457 else
2458 return false;
2459 }
2460 break;
2461 //----------------------------------------------------------------------
2462 // OPCODE: DW_OP_bregx
2463 // OPERANDS: 2
2464 // ULEB128 literal operand that encodes the register.
2465 // SLEB128 offset from register N
2466 // DESCRIPTION: Value is in memory at the address specified by register
2467 // N plus an offset.
2468 //----------------------------------------------------------------------
2469 case DW_OP_bregx:
2470 {
2471 reg_num = opcodes.GetULEB128(&offset);
2472
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]2473 if (ReadRegisterValueAsScalar (reg_ctx, reg_kind, reg_num, error_ptr, tmp))
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2474 {
2475 int64_t breg_offset = opcodes.GetSLEB128(&offset);
2476 tmp.ResolveValue(exe_ctx, ast_context) += (uint64_t)breg_offset;
Sean Callanan6fc5c712012-01-06 18:24:47 +0000[diff] [blame]2477 tmp.ClearContext();
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2478 stack.push_back(tmp);
2479 stack.back().SetValueType (Value::eValueTypeLoadAddress);
2480 }
2481 else
2482 return false;
2483 }
2484 break;
2485
2486 case DW_OP_fbreg:
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2487 if (exe_ctx)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2488 {
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2489 if (frame)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2490 {
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2491 Scalar value;
2492 if (frame->GetFrameBaseValue(value, error_ptr))
2493 {
2494 int64_t fbreg_offset = opcodes.GetSLEB128(&offset);
2495 value += fbreg_offset;
2496 stack.push_back(value);
2497 stack.back().SetValueType (Value::eValueTypeLoadAddress);
2498 }
2499 else
2500 return false;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2501 }
2502 else
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2503 {
2504 if (error_ptr)
2505 error_ptr->SetErrorString ("Invalid stack frame in context for DW_OP_fbreg opcode.");
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2506 return false;
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2507 }
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2508 }
2509 else
2510 {
2511 if (error_ptr)
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2512 error_ptr->SetErrorStringWithFormat ("NULL execution context for DW_OP_fbreg.\n");
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2513 return false;
2514 }
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2515
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2516 break;
2517
2518 //----------------------------------------------------------------------
2519 // OPCODE: DW_OP_nop
2520 // OPERANDS: none
2521 // DESCRIPTION: A place holder. It has no effect on the location stack
2522 // or any of its values.
2523 //----------------------------------------------------------------------
2524 case DW_OP_nop:
2525 break;
2526
2527 //----------------------------------------------------------------------
2528 // OPCODE: DW_OP_piece
2529 // OPERANDS: 1
2530 // ULEB128: byte size of the piece
2531 // DESCRIPTION: The operand describes the size in bytes of the piece of
2532 // the object referenced by the DWARF expression whose result is at the
2533 // top of the stack. If the piece is located in a register, but does not
2534 // occupy the entire register, the placement of the piece within that
2535 // register is defined by the ABI.
2536 //
2537 // Many compilers store a single variable in sets of registers, or store
2538 // a variable partially in memory and partially in registers.
2539 // DW_OP_piece provides a way of describing how large a part of a
2540 // variable a particular DWARF expression refers to.
2541 //----------------------------------------------------------------------
2542 case DW_OP_piece:
2543 if (error_ptr)
2544 error_ptr->SetErrorString ("Unimplemented opcode DW_OP_piece.");
2545 return false;
2546
2547 //----------------------------------------------------------------------
2548 // OPCODE: DW_OP_push_object_address
2549 // OPERANDS: none
2550 // DESCRIPTION: Pushes the address of the object currently being
2551 // evaluated as part of evaluation of a user presented expression.
2552 // This object may correspond to an independent variable described by
2553 // its own DIE or it may be a component of an array, structure, or class
2554 // whose address has been dynamically determined by an earlier step
2555 // during user expression evaluation.
2556 //----------------------------------------------------------------------
2557 case DW_OP_push_object_address:
2558 if (error_ptr)
2559 error_ptr->SetErrorString ("Unimplemented opcode DW_OP_push_object_address.");
2560 return false;
2561
2562 //----------------------------------------------------------------------
2563 // OPCODE: DW_OP_call2
2564 // OPERANDS:
2565 // uint16_t compile unit relative offset of a DIE
2566 // DESCRIPTION: Performs subroutine calls during evaluation
2567 // of a DWARF expression. The operand is the 2-byte unsigned offset
2568 // of a debugging information entry in the current compilation unit.
2569 //
2570 // Operand interpretation is exactly like that for DW_FORM_ref2.
2571 //
2572 // This operation transfers control of DWARF expression evaluation
2573 // to the DW_AT_location attribute of the referenced DIE. If there is
2574 // no such attribute, then there is no effect. Execution of the DWARF
2575 // expression of a DW_AT_location attribute may add to and/or remove from
2576 // values on the stack. Execution returns to the point following the call
2577 // when the end of the attribute is reached. Values on the stack at the
2578 // time of the call may be used as parameters by the called expression
2579 // and values left on the stack by the called expression may be used as
2580 // return values by prior agreement between the calling and called
2581 // expressions.
2582 //----------------------------------------------------------------------
2583 case DW_OP_call2:
2584 if (error_ptr)
2585 error_ptr->SetErrorString ("Unimplemented opcode DW_OP_call2.");
2586 return false;
2587 //----------------------------------------------------------------------
2588 // OPCODE: DW_OP_call4
2589 // OPERANDS: 1
2590 // uint32_t compile unit relative offset of a DIE
2591 // DESCRIPTION: Performs a subroutine call during evaluation of a DWARF
2592 // expression. For DW_OP_call4, the operand is a 4-byte unsigned offset
2593 // of a debugging information entry in the current compilation unit.
2594 //
2595 // Operand interpretation DW_OP_call4 is exactly like that for
2596 // DW_FORM_ref4.
2597 //
2598 // This operation transfers control of DWARF expression evaluation
2599 // to the DW_AT_location attribute of the referenced DIE. If there is
2600 // no such attribute, then there is no effect. Execution of the DWARF
2601 // expression of a DW_AT_location attribute may add to and/or remove from
2602 // values on the stack. Execution returns to the point following the call
2603 // when the end of the attribute is reached. Values on the stack at the
2604 // time of the call may be used as parameters by the called expression
2605 // and values left on the stack by the called expression may be used as
2606 // return values by prior agreement between the calling and called
2607 // expressions.
2608 //----------------------------------------------------------------------
2609 case DW_OP_call4:
2610 if (error_ptr)
2611 error_ptr->SetErrorString ("Unimplemented opcode DW_OP_call4.");
2612 return false;
2613
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]2614#if 0
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2615 //----------------------------------------------------------------------
2616 // OPCODE: DW_OP_call_ref
2617 // OPERANDS:
2618 // uint32_t absolute DIE offset for 32-bit DWARF or a uint64_t
2619 // absolute DIE offset for 64 bit DWARF.
2620 // DESCRIPTION: Performs a subroutine call during evaluation of a DWARF
2621 // expression. Takes a single operand. In the 32-bit DWARF format, the
2622 // operand is a 4-byte unsigned value; in the 64-bit DWARF format, it
2623 // is an 8-byte unsigned value. The operand is used as the offset of a
2624 // debugging information entry in a .debug_info section which may be
2625 // contained in a shared object for executable other than that
2626 // containing the operator. For references from one shared object or
2627 // executable to another, the relocation must be performed by the
2628 // consumer.
2629 //
2630 // Operand interpretation of DW_OP_call_ref is exactly like that for
2631 // DW_FORM_ref_addr.
2632 //
2633 // This operation transfers control of DWARF expression evaluation
2634 // to the DW_AT_location attribute of the referenced DIE. If there is
2635 // no such attribute, then there is no effect. Execution of the DWARF
2636 // expression of a DW_AT_location attribute may add to and/or remove from
2637 // values on the stack. Execution returns to the point following the call
2638 // when the end of the attribute is reached. Values on the stack at the
2639 // time of the call may be used as parameters by the called expression
2640 // and values left on the stack by the called expression may be used as
2641 // return values by prior agreement between the calling and called
2642 // expressions.
2643 //----------------------------------------------------------------------
2644 case DW_OP_call_ref:
2645 if (error_ptr)
2646 error_ptr->SetErrorString ("Unimplemented opcode DW_OP_call_ref.");
2647 return false;
2648
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]2649 //----------------------------------------------------------------------
2650 // OPCODE: DW_OP_APPLE_array_ref
2651 // OPERANDS: none
2652 // DESCRIPTION: Pops a value off the stack and uses it as the array
2653 // index. Pops a second value off the stack and uses it as the array
2654 // itself. Pushes a value onto the stack representing the element of
2655 // the array specified by the index.
2656 //----------------------------------------------------------------------
2657 case DW_OP_APPLE_array_ref:
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2658 {
2659 if (stack.size() < 2)
2660 {
2661 if (error_ptr)
2662 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_APPLE_array_ref.");
2663 return false;
2664 }
2665
2666 Value index_val = stack.back();
2667 stack.pop_back();
2668 Value array_val = stack.back();
2669 stack.pop_back();
2670
2671 Scalar &index_scalar = index_val.ResolveValue(exe_ctx, ast_context);
Greg Clayton381f9682011-04-01 18:14:08 +0000[diff] [blame]2672 int64_t index = index_scalar.SLongLong(LLONG_MAX);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2673
Greg Clayton381f9682011-04-01 18:14:08 +0000[diff] [blame]2674 if (index == LLONG_MAX)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2675 {
2676 if (error_ptr)
2677 error_ptr->SetErrorString("Invalid array index.");
2678 return false;
2679 }
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]2680
Greg Clayton6916e352010-11-13 03:52:47 +0000[diff] [blame]2681 if (array_val.GetContextType() != Value::eContextTypeClangType)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2682 {
2683 if (error_ptr)
2684 error_ptr->SetErrorString("Arrays without Clang types are unhandled at this time.");
2685 return false;
2686 }
2687
2688 if (array_val.GetValueType() != Value::eValueTypeLoadAddress &&
2689 array_val.GetValueType() != Value::eValueTypeHostAddress)
2690 {
2691 if (error_ptr)
2692 error_ptr->SetErrorString("Array must be stored in memory.");
2693 return false;
2694 }
2695
Greg Clayton462d4142010-09-29 01:12:09 +0000[diff] [blame]2696 void *array_type = array_val.GetClangType();
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2697
2698 void *member_type;
2699 uint64_t size = 0;
2700
2701 if ((!ClangASTContext::IsPointerType(array_type, &member_type)) &&
2702 (!ClangASTContext::IsArrayType(array_type, &member_type, &size)))
2703 {
2704 if (error_ptr)
2705 error_ptr->SetErrorString("Array reference from something that is neither a pointer nor an array.");
2706 return false;
2707 }
2708
2709 if (size && (index >= size || index < 0))
2710 {
2711 if (error_ptr)
Daniel Malea5f35a4b2012-11-29 21:49:15 +0000[diff] [blame]2712 error_ptr->SetErrorStringWithFormat("Out of bounds array access. %" PRId64 " is not in [0, %" PRIu64 "]", index, size);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2713 return false;
2714 }
2715
Greg Clayton960d6a42010-08-03 00:35:52 +0000[diff] [blame]2716 uint64_t member_bit_size = ClangASTType::GetClangTypeBitWidth(ast_context, member_type);
2717 uint64_t member_bit_align = ClangASTType::GetTypeBitAlign(ast_context, member_type);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2718 uint64_t member_bit_incr = ((member_bit_size + member_bit_align - 1) / member_bit_align) * member_bit_align;
2719 if (member_bit_incr % 8)
2720 {
2721 if (error_ptr)
Jason Molenda95b7b432011-09-20 00:26:08 +0000[diff] [blame]2722 error_ptr->SetErrorStringWithFormat("Array increment is not byte aligned");
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2723 return false;
2724 }
2725 int64_t member_offset = (int64_t)(member_bit_incr / 8) * index;
2726
2727 Value member;
2728
Greg Clayton6916e352010-11-13 03:52:47 +0000[diff] [blame]2729 member.SetContext(Value::eContextTypeClangType, member_type);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2730 member.SetValueType(array_val.GetValueType());
2731
2732 addr_t array_base = (addr_t)array_val.GetScalar().ULongLong(LLDB_INVALID_ADDRESS);
2733 addr_t member_loc = array_base + member_offset;
2734 member.GetScalar() = (uint64_t)member_loc;
2735
2736 stack.push_back(member);
2737 }
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]2738 break;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2739
2740 //----------------------------------------------------------------------
2741 // OPCODE: DW_OP_APPLE_uninit
2742 // OPERANDS: none
2743 // DESCRIPTION: Lets us know that the value is currently not initialized
2744 //----------------------------------------------------------------------
2745 case DW_OP_APPLE_uninit:
2746 //return eResultTypeErrorUninitialized;
2747 break; // Ignore this as we have seen cases where this value is incorrectly added
2748
2749 //----------------------------------------------------------------------
2750 // OPCODE: DW_OP_APPLE_assign
2751 // OPERANDS: none
2752 // DESCRIPTION: Pops a value off of the stack and assigns it to the next
2753 // item on the stack which must be something assignable (inferior
2754 // Variable, inferior Type with address, inferior register, or
2755 // expression local variable.
2756 //----------------------------------------------------------------------
2757 case DW_OP_APPLE_assign:
2758 if (stack.size() < 2)
2759 {
2760 if (error_ptr)
2761 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_APPLE_assign.");
2762 return false;
2763 }
2764 else
2765 {
2766 tmp = stack.back();
2767 stack.pop_back();
2768 Value::ContextType context_type = stack.back().GetContextType();
Greg Claytoncd548032011-02-01 01:31:41 +0000[diff] [blame]2769 StreamString new_value(Stream::eBinary, 4, lldb::endian::InlHostByteOrder());
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2770 switch (context_type)
2771 {
Greg Clayton6916e352010-11-13 03:52:47 +0000[diff] [blame]2772 case Value::eContextTypeClangType:
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2773 {
Greg Clayton462d4142010-09-29 01:12:09 +0000[diff] [blame]2774 void *clang_type = stack.back().GetClangType();
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2775
2776 if (ClangASTContext::IsAggregateType (clang_type))
2777 {
2778 Value::ValueType source_value_type = tmp.GetValueType();
2779 Value::ValueType target_value_type = stack.back().GetValueType();
2780
2781 addr_t source_addr = (addr_t)tmp.GetScalar().ULongLong();
2782 addr_t target_addr = (addr_t)stack.back().GetScalar().ULongLong();
2783
Greg Clayton960d6a42010-08-03 00:35:52 +0000[diff] [blame]2784 size_t byte_size = (ClangASTType::GetClangTypeBitWidth(ast_context, clang_type) + 7) / 8;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2785
2786 switch (source_value_type)
2787 {
Greg Clayton4fdf7602011-03-20 04:57:14 +0000[diff] [blame]2788 case Value::eValueTypeScalar:
2789 case Value::eValueTypeFileAddress:
2790 break;
2791
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2792 case Value::eValueTypeLoadAddress:
2793 switch (target_value_type)
2794 {
2795 case Value::eValueTypeLoadAddress:
2796 {
2797 DataBufferHeap data;
2798 data.SetByteSize(byte_size);
2799
2800 Error error;
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2801 if (process->ReadMemory (source_addr, data.GetBytes(), byte_size, error) != byte_size)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2802 {
2803 if (error_ptr)
2804 error_ptr->SetErrorStringWithFormat ("Couldn't read a composite type from the target: %s", error.AsCString());
2805 return false;
2806 }
2807
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2808 if (process->WriteMemory (target_addr, data.GetBytes(), byte_size, error) != byte_size)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2809 {
2810 if (error_ptr)
2811 error_ptr->SetErrorStringWithFormat ("Couldn't write a composite type to the target: %s", error.AsCString());
2812 return false;
2813 }
2814 }
2815 break;
2816 case Value::eValueTypeHostAddress:
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2817 if (process->GetByteOrder() != lldb::endian::InlHostByteOrder())
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2818 {
2819 if (error_ptr)
2820 error_ptr->SetErrorStringWithFormat ("Copy of composite types between incompatible byte orders is unimplemented");
2821 return false;
2822 }
2823 else
2824 {
2825 Error error;
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2826 if (process->ReadMemory (source_addr, (uint8_t*)target_addr, byte_size, error) != byte_size)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2827 {
2828 if (error_ptr)
2829 error_ptr->SetErrorStringWithFormat ("Couldn't read a composite type from the target: %s", error.AsCString());
2830 return false;
2831 }
2832 }
2833 break;
2834 default:
2835 return false;
2836 }
2837 break;
2838 case Value::eValueTypeHostAddress:
2839 switch (target_value_type)
2840 {
2841 case Value::eValueTypeLoadAddress:
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2842 if (process->GetByteOrder() != lldb::endian::InlHostByteOrder())
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2843 {
2844 if (error_ptr)
2845 error_ptr->SetErrorStringWithFormat ("Copy of composite types between incompatible byte orders is unimplemented");
2846 return false;
2847 }
2848 else
2849 {
2850 Error error;
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2851 if (process->WriteMemory (target_addr, (uint8_t*)source_addr, byte_size, error) != byte_size)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2852 {
2853 if (error_ptr)
2854 error_ptr->SetErrorStringWithFormat ("Couldn't write a composite type to the target: %s", error.AsCString());
2855 return false;
2856 }
2857 }
2858 case Value::eValueTypeHostAddress:
2859 memcpy ((uint8_t*)target_addr, (uint8_t*)source_addr, byte_size);
2860 break;
2861 default:
2862 return false;
2863 }
2864 }
2865 }
2866 else
2867 {
Greg Clayton1674b122010-07-21 22:12:05 +0000[diff] [blame]2868 if (!ClangASTType::SetValueFromScalar (ast_context,
2869 clang_type,
2870 tmp.ResolveValue(exe_ctx, ast_context),
2871 new_value))
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2872 {
2873 if (error_ptr)
2874 error_ptr->SetErrorStringWithFormat ("Couldn't extract a value from an integral type.\n");
2875 return false;
2876 }
2877
2878 Value::ValueType value_type = stack.back().GetValueType();
2879
2880 switch (value_type)
2881 {
2882 case Value::eValueTypeLoadAddress:
2883 case Value::eValueTypeHostAddress:
2884 {
Greg Claytonb3448432011-03-24 21:19:54 +0000[diff] [blame]2885 AddressType address_type = (value_type == Value::eValueTypeLoadAddress ? eAddressTypeLoad : eAddressTypeHost);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2886 lldb::addr_t addr = stack.back().GetScalar().ULongLong(LLDB_INVALID_ADDRESS);
Greg Clayton1674b122010-07-21 22:12:05 +0000[diff] [blame]2887 if (!ClangASTType::WriteToMemory (ast_context,
2888 clang_type,
2889 exe_ctx,
2890 addr,
2891 address_type,
2892 new_value))
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2893 {
2894 if (error_ptr)
Daniel Malea5f35a4b2012-11-29 21:49:15 +0000[diff] [blame]2895 error_ptr->SetErrorStringWithFormat ("Failed to write value to memory at 0x%" PRIx64 ".\n", addr);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2896 return false;
2897 }
2898 }
2899 break;
2900
2901 default:
2902 break;
2903 }
2904 }
2905 }
2906 break;
2907
2908 default:
2909 if (error_ptr)
2910 error_ptr->SetErrorString ("Assign failed.");
2911 return false;
2912 }
2913 }
2914 break;
2915
2916 //----------------------------------------------------------------------
2917 // OPCODE: DW_OP_APPLE_address_of
2918 // OPERANDS: none
2919 // DESCRIPTION: Pops a value off of the stack and pushed its address.
2920 // The top item on the stack must be a variable, or already be a memory
2921 // location.
2922 //----------------------------------------------------------------------
2923 case DW_OP_APPLE_address_of:
2924 if (stack.empty())
2925 {
2926 if (error_ptr)
2927 error_ptr->SetErrorString("Expression stack needs at least 1 item for DW_OP_APPLE_address_of.");
2928 return false;
2929 }
2930 else
2931 {
2932 Value::ValueType value_type = stack.back().GetValueType();
2933 switch (value_type)
2934 {
2935 default:
2936 case Value::eValueTypeScalar: // raw scalar value
2937 if (error_ptr)
2938 error_ptr->SetErrorString("Top stack item isn't a memory based object.");
2939 return false;
2940
2941 case Value::eValueTypeLoadAddress: // load address value
2942 case Value::eValueTypeFileAddress: // file address value
2943 case Value::eValueTypeHostAddress: // host address value (for memory in the process that is using liblldb)
2944 // Taking the address of an object reduces it to the address
2945 // of the value and removes any extra context it had.
2946 //stack.back().SetValueType(Value::eValueTypeScalar);
2947 stack.back().ClearContext();
2948 break;
2949 }
2950 }
2951 break;
2952
2953 //----------------------------------------------------------------------
2954 // OPCODE: DW_OP_APPLE_value_of
2955 // OPERANDS: none
2956 // DESCRIPTION: Pops a value off of the stack and pushed its value.
2957 // The top item on the stack must be a variable, expression variable.
2958 //----------------------------------------------------------------------
2959 case DW_OP_APPLE_value_of:
2960 if (stack.empty())
2961 {
2962 if (error_ptr)
2963 error_ptr->SetErrorString("Expression stack needs at least 1 items for DW_OP_APPLE_value_of.");
2964 return false;
2965 }
2966 else if (!stack.back().ValueOf(exe_ctx, ast_context))
2967 {
2968 if (error_ptr)
2969 error_ptr->SetErrorString ("Top stack item isn't a valid candidate for DW_OP_APPLE_value_of.");
2970 return false;
2971 }
2972 break;
2973
2974 //----------------------------------------------------------------------
2975 // OPCODE: DW_OP_APPLE_deref_type
2976 // OPERANDS: none
2977 // DESCRIPTION: gets the value pointed to by the top stack item
2978 //----------------------------------------------------------------------
2979 case DW_OP_APPLE_deref_type:
2980 {
2981 if (stack.empty())
2982 {
2983 if (error_ptr)
2984 error_ptr->SetErrorString("Expression stack needs at least 1 items for DW_OP_APPLE_deref_type.");
2985 return false;
2986 }
2987
2988 tmp = stack.back();
2989 stack.pop_back();
2990
Greg Clayton6916e352010-11-13 03:52:47 +0000[diff] [blame]2991 if (tmp.GetContextType() != Value::eContextTypeClangType)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2992 {
2993 if (error_ptr)
2994 error_ptr->SetErrorString("Item at top of expression stack must have a Clang type");
2995 return false;
2996 }
2997
Greg Clayton462d4142010-09-29 01:12:09 +0000[diff] [blame]2998 void *ptr_type = tmp.GetClangType();
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2999 void *target_type;
3000
3001 if (!ClangASTContext::IsPointerType(ptr_type, &target_type))
3002 {
3003 if (error_ptr)
3004 error_ptr->SetErrorString("Dereferencing a non-pointer type");
3005 return false;
3006 }
3007
3008 // TODO do we want all pointers to be dereferenced as load addresses?
3009 Value::ValueType value_type = tmp.GetValueType();
3010
3011 tmp.ResolveValue(exe_ctx, ast_context);
3012
3013 tmp.SetValueType(value_type);
Greg Clayton6916e352010-11-13 03:52:47 +0000[diff] [blame]3014 tmp.SetContext(Value::eContextTypeClangType, target_type);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3015
3016 stack.push_back(tmp);
3017 }
3018 break;
3019
3020 //----------------------------------------------------------------------
3021 // OPCODE: DW_OP_APPLE_expr_local
3022 // OPERANDS: ULEB128
3023 // DESCRIPTION: pushes the expression local variable index onto the
3024 // stack and set the appropriate context so we know the stack item is
3025 // an expression local variable index.
3026 //----------------------------------------------------------------------
3027 case DW_OP_APPLE_expr_local:
3028 {
Sean Callanana6223432010-08-20 01:02:30 +0000[diff] [blame]3029 /*
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3030 uint32_t idx = opcodes.GetULEB128(&offset);
3031 if (expr_locals == NULL)
3032 {
3033 if (error_ptr)
3034 error_ptr->SetErrorStringWithFormat ("DW_OP_APPLE_expr_local(%u) opcode encountered with no local variable list.\n", idx);
3035 return false;
3036 }
3037 Value *expr_local_variable = expr_locals->GetVariableAtIndex(idx);
3038 if (expr_local_variable == NULL)
3039 {
3040 if (error_ptr)
3041 error_ptr->SetErrorStringWithFormat ("DW_OP_APPLE_expr_local(%u) with invalid index %u.\n", idx, idx);
3042 return false;
3043 }
Greg Clayton801417e2011-07-07 01:59:51 +0000[diff] [blame]3044 // The proxy code has been removed. If it is ever re-added, please
3045 // use shared pointers or return by value to avoid possible memory
3046 // leak (there is no leak here, but in general, no returning pointers
3047 // that must be manually freed please.
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3048 Value *proxy = expr_local_variable->CreateProxy();
3049 stack.push_back(*proxy);
3050 delete proxy;
Greg Clayton6916e352010-11-13 03:52:47 +0000[diff] [blame]3051 //stack.back().SetContext (Value::eContextTypeClangType, expr_local_variable->GetClangType());
Sean Callanana6223432010-08-20 01:02:30 +0000[diff] [blame]3052 */
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3053 }
3054 break;
3055
3056 //----------------------------------------------------------------------
3057 // OPCODE: DW_OP_APPLE_extern
3058 // OPERANDS: ULEB128
3059 // DESCRIPTION: pushes a proxy for the extern object index onto the
3060 // stack.
3061 //----------------------------------------------------------------------
3062 case DW_OP_APPLE_extern:
3063 {
Sean Callanan8c127202010-08-23 23:09:38 +0000[diff] [blame]3064 /*
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3065 uint32_t idx = opcodes.GetULEB128(&offset);
3066 if (!decl_map)
3067 {
3068 if (error_ptr)
3069 error_ptr->SetErrorStringWithFormat ("DW_OP_APPLE_extern(%u) opcode encountered with no decl map.\n", idx);
3070 return false;
3071 }
3072 Value *extern_var = decl_map->GetValueForIndex(idx);
3073 if (!extern_var)
3074 {
3075 if (error_ptr)
3076 error_ptr->SetErrorStringWithFormat ("DW_OP_APPLE_extern(%u) with invalid index %u.\n", idx, idx);
3077 return false;
3078 }
Greg Clayton801417e2011-07-07 01:59:51 +0000[diff] [blame]3079 // The proxy code has been removed. If it is ever re-added, please
3080 // use shared pointers or return by value to avoid possible memory
3081 // leak (there is no leak here, but in general, no returning pointers
3082 // that must be manually freed please.
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3083 Value *proxy = extern_var->CreateProxy();
3084 stack.push_back(*proxy);
3085 delete proxy;
Sean Callanan8c127202010-08-23 23:09:38 +0000[diff] [blame]3086 */
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3087 }
3088 break;
3089
3090 case DW_OP_APPLE_scalar_cast:
3091 if (stack.empty())
3092 {
3093 if (error_ptr)
3094 error_ptr->SetErrorString("Expression stack needs at least 1 item for DW_OP_APPLE_scalar_cast.");
3095 return false;
3096 }
3097 else
3098 {
3099 // Simple scalar cast
3100 if (!stack.back().ResolveValue(exe_ctx, ast_context).Cast((Scalar::Type)opcodes.GetU8(&offset)))
3101 {
3102 if (error_ptr)
3103 error_ptr->SetErrorString("Cast failed.");
3104 return false;
3105 }
3106 }
3107 break;
3108
3109
3110 case DW_OP_APPLE_clang_cast:
3111 if (stack.empty())
3112 {
3113 if (error_ptr)
3114 error_ptr->SetErrorString("Expression stack needs at least 1 item for DW_OP_APPLE_clang_cast.");
3115 return false;
3116 }
3117 else
3118 {
3119 void *clang_type = (void *)opcodes.GetMaxU64(&offset, sizeof(void*));
Greg Clayton6916e352010-11-13 03:52:47 +0000[diff] [blame]3120 stack.back().SetContext (Value::eContextTypeClangType, clang_type);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3121 }
3122 break;
3123 //----------------------------------------------------------------------
3124 // OPCODE: DW_OP_APPLE_constf
3125 // OPERANDS: 1 byte float length, followed by that many bytes containing
3126 // the constant float data.
3127 // DESCRIPTION: Push a float value onto the expression stack.
3128 //----------------------------------------------------------------------
3129 case DW_OP_APPLE_constf: // 0xF6 - 1 byte float size, followed by constant float data
3130 {
3131 uint8_t float_length = opcodes.GetU8(&offset);
3132 if (sizeof(float) == float_length)
3133 tmp.ResolveValue(exe_ctx, ast_context) = opcodes.GetFloat (&offset);
3134 else if (sizeof(double) == float_length)
3135 tmp.ResolveValue(exe_ctx, ast_context) = opcodes.GetDouble (&offset);
3136 else if (sizeof(long double) == float_length)
3137 tmp.ResolveValue(exe_ctx, ast_context) = opcodes.GetLongDouble (&offset);
3138 else
3139 {
3140 StreamString new_value;
3141 opcodes.Dump(&new_value, offset, eFormatBytes, 1, float_length, UINT32_MAX, DW_INVALID_ADDRESS, 0, 0);
3142
3143 if (error_ptr)
3144 error_ptr->SetErrorStringWithFormat ("DW_OP_APPLE_constf(<%u> %s) unsupported float size.\n", float_length, new_value.GetData());
3145 return false;
3146 }
3147 tmp.SetValueType(Value::eValueTypeScalar);
3148 tmp.ClearContext();
3149 stack.push_back(tmp);
3150 }
3151 break;
3152 //----------------------------------------------------------------------
3153 // OPCODE: DW_OP_APPLE_clear
3154 // OPERANDS: none
3155 // DESCRIPTION: Clears the expression stack.
3156 //----------------------------------------------------------------------
3157 case DW_OP_APPLE_clear:
3158 stack.clear();
3159 break;
3160
3161 //----------------------------------------------------------------------
3162 // OPCODE: DW_OP_APPLE_error
3163 // OPERANDS: none
3164 // DESCRIPTION: Pops a value off of the stack and pushed its value.
3165 // The top item on the stack must be a variable, expression variable.
3166 //----------------------------------------------------------------------
3167 case DW_OP_APPLE_error: // 0xFF - Stops expression evaluation and returns an error (no args)
3168 if (error_ptr)
3169 error_ptr->SetErrorString ("Generic error.");
3170 return false;
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]3171#endif // #if 0
3172
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3173 }
3174 }
3175
3176 if (stack.empty())
3177 {
3178 if (error_ptr)
3179 error_ptr->SetErrorString ("Stack empty after evaluation.");
3180 return false;
3181 }
Sean Callanan67bbb112011-10-14 20:34:21 +0000[diff] [blame]3182 else if (log && log->GetVerbose())
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3183 {
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3184 size_t count = stack.size();
Jason Molenda7e5fa7f2011-09-20 21:44:10 +0000[diff] [blame]3185 log->Printf("Stack after operation has %lu values:", count);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3186 for (size_t i=0; i<count; ++i)
3187 {
3188 StreamString new_value;
Daniel Malea5f35a4b2012-11-29 21:49:15 +0000[diff] [blame]3189 new_value.Printf("[%" PRIu64 "]", (uint64_t)i);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3190 stack[i].Dump(&new_value);
Sean Callanan6184dfe2010-06-23 00:47:48 +0000[diff] [blame]3191 log->Printf(" %s", new_value.GetData());
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3192 }
3193 }
3194
3195 result = stack.back();
3196 return true; // Return true on success
3197}
3198