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gerrit-public.fairphone.software / fp2-dev / platform / external / lldb / 21ef5bb658e4582339bedf5befc10c13953bdac0 / . / source / Expression / DWARFExpression.cpp
blob: 1547632bc45d5d6083896cd240eadc385c3ea8cc [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"
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]27
28#include "lldb/lldb-private-log.h"
29
Greg Clayton1674b122010-07-21 22:12:05 +0000[diff] [blame]30#include "lldb/Symbol/ClangASTType.h"
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]31#include "lldb/Symbol/ClangASTContext.h"
32#include "lldb/Symbol/Type.h"
33
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]34#include "lldb/Target/ABI.h"
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]35#include "lldb/Target/ExecutionContext.h"
36#include "lldb/Target/Process.h"
37#include "lldb/Target/RegisterContext.h"
38#include "lldb/Target/StackFrame.h"
39
40using namespace lldb;
41using namespace lldb_private;
42
43const char *
44DW_OP_value_to_name (uint32_t val)
45{
46 static char invalid[100];
47 switch (val) {
48 case 0x03: return "DW_OP_addr";
49 case 0x06: return "DW_OP_deref";
50 case 0x08: return "DW_OP_const1u";
51 case 0x09: return "DW_OP_const1s";
52 case 0x0a: return "DW_OP_const2u";
53 case 0x0b: return "DW_OP_const2s";
54 case 0x0c: return "DW_OP_const4u";
55 case 0x0d: return "DW_OP_const4s";
56 case 0x0e: return "DW_OP_const8u";
57 case 0x0f: return "DW_OP_const8s";
58 case 0x10: return "DW_OP_constu";
59 case 0x11: return "DW_OP_consts";
60 case 0x12: return "DW_OP_dup";
61 case 0x13: return "DW_OP_drop";
62 case 0x14: return "DW_OP_over";
63 case 0x15: return "DW_OP_pick";
64 case 0x16: return "DW_OP_swap";
65 case 0x17: return "DW_OP_rot";
66 case 0x18: return "DW_OP_xderef";
67 case 0x19: return "DW_OP_abs";
68 case 0x1a: return "DW_OP_and";
69 case 0x1b: return "DW_OP_div";
70 case 0x1c: return "DW_OP_minus";
71 case 0x1d: return "DW_OP_mod";
72 case 0x1e: return "DW_OP_mul";
73 case 0x1f: return "DW_OP_neg";
74 case 0x20: return "DW_OP_not";
75 case 0x21: return "DW_OP_or";
76 case 0x22: return "DW_OP_plus";
77 case 0x23: return "DW_OP_plus_uconst";
78 case 0x24: return "DW_OP_shl";
79 case 0x25: return "DW_OP_shr";
80 case 0x26: return "DW_OP_shra";
81 case 0x27: return "DW_OP_xor";
82 case 0x2f: return "DW_OP_skip";
83 case 0x28: return "DW_OP_bra";
84 case 0x29: return "DW_OP_eq";
85 case 0x2a: return "DW_OP_ge";
86 case 0x2b: return "DW_OP_gt";
87 case 0x2c: return "DW_OP_le";
88 case 0x2d: return "DW_OP_lt";
89 case 0x2e: return "DW_OP_ne";
90 case 0x30: return "DW_OP_lit0";
91 case 0x31: return "DW_OP_lit1";
92 case 0x32: return "DW_OP_lit2";
93 case 0x33: return "DW_OP_lit3";
94 case 0x34: return "DW_OP_lit4";
95 case 0x35: return "DW_OP_lit5";
96 case 0x36: return "DW_OP_lit6";
97 case 0x37: return "DW_OP_lit7";
98 case 0x38: return "DW_OP_lit8";
99 case 0x39: return "DW_OP_lit9";
100 case 0x3a: return "DW_OP_lit10";
101 case 0x3b: return "DW_OP_lit11";
102 case 0x3c: return "DW_OP_lit12";
103 case 0x3d: return "DW_OP_lit13";
104 case 0x3e: return "DW_OP_lit14";
105 case 0x3f: return "DW_OP_lit15";
106 case 0x40: return "DW_OP_lit16";
107 case 0x41: return "DW_OP_lit17";
108 case 0x42: return "DW_OP_lit18";
109 case 0x43: return "DW_OP_lit19";
110 case 0x44: return "DW_OP_lit20";
111 case 0x45: return "DW_OP_lit21";
112 case 0x46: return "DW_OP_lit22";
113 case 0x47: return "DW_OP_lit23";
114 case 0x48: return "DW_OP_lit24";
115 case 0x49: return "DW_OP_lit25";
116 case 0x4a: return "DW_OP_lit26";
117 case 0x4b: return "DW_OP_lit27";
118 case 0x4c: return "DW_OP_lit28";
119 case 0x4d: return "DW_OP_lit29";
120 case 0x4e: return "DW_OP_lit30";
121 case 0x4f: return "DW_OP_lit31";
122 case 0x50: return "DW_OP_reg0";
123 case 0x51: return "DW_OP_reg1";
124 case 0x52: return "DW_OP_reg2";
125 case 0x53: return "DW_OP_reg3";
126 case 0x54: return "DW_OP_reg4";
127 case 0x55: return "DW_OP_reg5";
128 case 0x56: return "DW_OP_reg6";
129 case 0x57: return "DW_OP_reg7";
130 case 0x58: return "DW_OP_reg8";
131 case 0x59: return "DW_OP_reg9";
132 case 0x5a: return "DW_OP_reg10";
133 case 0x5b: return "DW_OP_reg11";
134 case 0x5c: return "DW_OP_reg12";
135 case 0x5d: return "DW_OP_reg13";
136 case 0x5e: return "DW_OP_reg14";
137 case 0x5f: return "DW_OP_reg15";
138 case 0x60: return "DW_OP_reg16";
139 case 0x61: return "DW_OP_reg17";
140 case 0x62: return "DW_OP_reg18";
141 case 0x63: return "DW_OP_reg19";
142 case 0x64: return "DW_OP_reg20";
143 case 0x65: return "DW_OP_reg21";
144 case 0x66: return "DW_OP_reg22";
145 case 0x67: return "DW_OP_reg23";
146 case 0x68: return "DW_OP_reg24";
147 case 0x69: return "DW_OP_reg25";
148 case 0x6a: return "DW_OP_reg26";
149 case 0x6b: return "DW_OP_reg27";
150 case 0x6c: return "DW_OP_reg28";
151 case 0x6d: return "DW_OP_reg29";
152 case 0x6e: return "DW_OP_reg30";
153 case 0x6f: return "DW_OP_reg31";
154 case 0x70: return "DW_OP_breg0";
155 case 0x71: return "DW_OP_breg1";
156 case 0x72: return "DW_OP_breg2";
157 case 0x73: return "DW_OP_breg3";
158 case 0x74: return "DW_OP_breg4";
159 case 0x75: return "DW_OP_breg5";
160 case 0x76: return "DW_OP_breg6";
161 case 0x77: return "DW_OP_breg7";
162 case 0x78: return "DW_OP_breg8";
163 case 0x79: return "DW_OP_breg9";
164 case 0x7a: return "DW_OP_breg10";
165 case 0x7b: return "DW_OP_breg11";
166 case 0x7c: return "DW_OP_breg12";
167 case 0x7d: return "DW_OP_breg13";
168 case 0x7e: return "DW_OP_breg14";
169 case 0x7f: return "DW_OP_breg15";
170 case 0x80: return "DW_OP_breg16";
171 case 0x81: return "DW_OP_breg17";
172 case 0x82: return "DW_OP_breg18";
173 case 0x83: return "DW_OP_breg19";
174 case 0x84: return "DW_OP_breg20";
175 case 0x85: return "DW_OP_breg21";
176 case 0x86: return "DW_OP_breg22";
177 case 0x87: return "DW_OP_breg23";
178 case 0x88: return "DW_OP_breg24";
179 case 0x89: return "DW_OP_breg25";
180 case 0x8a: return "DW_OP_breg26";
181 case 0x8b: return "DW_OP_breg27";
182 case 0x8c: return "DW_OP_breg28";
183 case 0x8d: return "DW_OP_breg29";
184 case 0x8e: return "DW_OP_breg30";
185 case 0x8f: return "DW_OP_breg31";
186 case 0x90: return "DW_OP_regx";
187 case 0x91: return "DW_OP_fbreg";
188 case 0x92: return "DW_OP_bregx";
189 case 0x93: return "DW_OP_piece";
190 case 0x94: return "DW_OP_deref_size";
191 case 0x95: return "DW_OP_xderef_size";
192 case 0x96: return "DW_OP_nop";
193 case 0x97: return "DW_OP_push_object_address";
194 case 0x98: return "DW_OP_call2";
195 case 0x99: return "DW_OP_call4";
196 case 0x9a: return "DW_OP_call_ref";
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]197// case DW_OP_APPLE_array_ref: return "DW_OP_APPLE_array_ref";
198// case DW_OP_APPLE_extern: return "DW_OP_APPLE_extern";
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]199 case DW_OP_APPLE_uninit: return "DW_OP_APPLE_uninit";
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]200// case DW_OP_APPLE_assign: return "DW_OP_APPLE_assign";
201// case DW_OP_APPLE_address_of: return "DW_OP_APPLE_address_of";
202// case DW_OP_APPLE_value_of: return "DW_OP_APPLE_value_of";
203// case DW_OP_APPLE_deref_type: return "DW_OP_APPLE_deref_type";
204// case DW_OP_APPLE_expr_local: return "DW_OP_APPLE_expr_local";
205// case DW_OP_APPLE_constf: return "DW_OP_APPLE_constf";
206// case DW_OP_APPLE_scalar_cast: return "DW_OP_APPLE_scalar_cast";
207// case DW_OP_APPLE_clang_cast: return "DW_OP_APPLE_clang_cast";
208// case DW_OP_APPLE_clear: return "DW_OP_APPLE_clear";
209// case DW_OP_APPLE_error: return "DW_OP_APPLE_error";
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]210 default:
211 snprintf (invalid, sizeof(invalid), "Unknown DW_OP constant: 0x%x", val);
212 return invalid;
213 }
214}
215
216
217//----------------------------------------------------------------------
218// DWARFExpression constructor
219//----------------------------------------------------------------------
220DWARFExpression::DWARFExpression() :
221 m_data(),
222 m_reg_kind (eRegisterKindDWARF),
Greg Claytonbdcb6ab2011-01-25 23:55:37 +0000[diff] [blame]223 m_loclist_slide (LLDB_INVALID_ADDRESS)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]224{
225}
226
227DWARFExpression::DWARFExpression(const DWARFExpression& rhs) :
228 m_data(rhs.m_data),
229 m_reg_kind (rhs.m_reg_kind),
Greg Claytonbdcb6ab2011-01-25 23:55:37 +0000[diff] [blame]230 m_loclist_slide(rhs.m_loclist_slide)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]231{
232}
233
234
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]235DWARFExpression::DWARFExpression(const DataExtractor& data, uint32_t data_offset, uint32_t data_length) :
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]236 m_data(data, data_offset, data_length),
237 m_reg_kind (eRegisterKindDWARF),
Greg Claytonbdcb6ab2011-01-25 23:55:37 +0000[diff] [blame]238 m_loclist_slide(LLDB_INVALID_ADDRESS)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]239{
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]240}
241
242//----------------------------------------------------------------------
243// Destructor
244//----------------------------------------------------------------------
245DWARFExpression::~DWARFExpression()
246{
247}
248
249
250bool
251DWARFExpression::IsValid() const
252{
253 return m_data.GetByteSize() > 0;
254}
255
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]256void
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]257DWARFExpression::SetOpcodeData (const DataExtractor& data)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]258{
259 m_data = data;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]260}
261
262void
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]263DWARFExpression::SetOpcodeData (const DataExtractor& data, uint32_t data_offset, uint32_t data_length)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]264{
265 m_data.SetData(data, data_offset, data_length);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]266}
267
268void
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]269DWARFExpression::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]270{
271 if (!m_data.ValidOffsetForDataOfSize(offset, length))
272 return;
273 const uint32_t start_offset = offset;
274 const uint32_t end_offset = offset + length;
275 while (m_data.ValidOffset(offset) && offset < end_offset)
276 {
277 const uint32_t op_offset = offset;
278 const uint8_t op = m_data.GetU8(&offset);
279
280 switch (level)
281 {
Greg Clayton54e7afa2010-07-09 20:39:50 +0000[diff] [blame]282 default:
283 break;
284
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]285 case lldb::eDescriptionLevelBrief:
286 if (offset > start_offset)
287 s->PutChar(' ');
288 break;
289
290 case lldb::eDescriptionLevelFull:
291 case lldb::eDescriptionLevelVerbose:
292 if (offset > start_offset)
293 s->EOL();
294 s->Indent();
295 if (level == lldb::eDescriptionLevelFull)
296 break;
297 // Fall through for verbose and print offset and DW_OP prefix..
298 s->Printf("0x%8.8x: %s", op_offset, op >= DW_OP_APPLE_uninit ? "DW_OP_APPLE_" : "DW_OP_");
299 break;
300 }
301
302 switch (op)
303 {
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]304 case DW_OP_addr: *s << "DW_OP_addr(" << m_data.GetAddress(&offset) << ") "; break; // 0x03 1 address
305 case DW_OP_deref: *s << "DW_OP_deref"; break; // 0x06
306 case DW_OP_const1u: s->Printf("DW_OP_const1u(0x%2.2x) ", m_data.GetU8(&offset)); break; // 0x08 1 1-byte constant
307 case DW_OP_const1s: s->Printf("DW_OP_const1s(0x%2.2x) ", m_data.GetU8(&offset)); break; // 0x09 1 1-byte constant
308 case DW_OP_const2u: s->Printf("DW_OP_const2u(0x%4.4x) ", m_data.GetU16(&offset)); break; // 0x0a 1 2-byte constant
309 case DW_OP_const2s: s->Printf("DW_OP_const2s(0x%4.4x) ", m_data.GetU16(&offset)); break; // 0x0b 1 2-byte constant
310 case DW_OP_const4u: s->Printf("DW_OP_const4u(0x%8.8x) ", m_data.GetU32(&offset)); break; // 0x0c 1 4-byte constant
311 case DW_OP_const4s: s->Printf("DW_OP_const4s(0x%8.8x) ", m_data.GetU32(&offset)); break; // 0x0d 1 4-byte constant
312 case DW_OP_const8u: s->Printf("DW_OP_const8u(0x%16.16llx) ", m_data.GetU64(&offset)); break; // 0x0e 1 8-byte constant
313 case DW_OP_const8s: s->Printf("DW_OP_const8s(0x%16.16llx) ", m_data.GetU64(&offset)); break; // 0x0f 1 8-byte constant
Jason Molenda7e5fa7f2011-09-20 21:44:10 +0000[diff] [blame]314 case DW_OP_constu: s->Printf("DW_OP_constu(0x%llx) ", m_data.GetULEB128(&offset)); break; // 0x10 1 ULEB128 constant
315 case DW_OP_consts: s->Printf("DW_OP_consts(0x%lld) ", m_data.GetSLEB128(&offset)); break; // 0x11 1 SLEB128 constant
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]316 case DW_OP_dup: s->PutCString("DW_OP_dup"); break; // 0x12
317 case DW_OP_drop: s->PutCString("DW_OP_drop"); break; // 0x13
318 case DW_OP_over: s->PutCString("DW_OP_over"); break; // 0x14
319 case DW_OP_pick: s->Printf("DW_OP_pick(0x%2.2x) ", m_data.GetU8(&offset)); break; // 0x15 1 1-byte stack index
320 case DW_OP_swap: s->PutCString("DW_OP_swap"); break; // 0x16
321 case DW_OP_rot: s->PutCString("DW_OP_rot"); break; // 0x17
322 case DW_OP_xderef: s->PutCString("DW_OP_xderef"); break; // 0x18
323 case DW_OP_abs: s->PutCString("DW_OP_abs"); break; // 0x19
324 case DW_OP_and: s->PutCString("DW_OP_and"); break; // 0x1a
325 case DW_OP_div: s->PutCString("DW_OP_div"); break; // 0x1b
326 case DW_OP_minus: s->PutCString("DW_OP_minus"); break; // 0x1c
327 case DW_OP_mod: s->PutCString("DW_OP_mod"); break; // 0x1d
328 case DW_OP_mul: s->PutCString("DW_OP_mul"); break; // 0x1e
329 case DW_OP_neg: s->PutCString("DW_OP_neg"); break; // 0x1f
330 case DW_OP_not: s->PutCString("DW_OP_not"); break; // 0x20
331 case DW_OP_or: s->PutCString("DW_OP_or"); break; // 0x21
332 case DW_OP_plus: s->PutCString("DW_OP_plus"); break; // 0x22
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]333 case DW_OP_plus_uconst: // 0x23 1 ULEB128 addend
Jason Molenda7e5fa7f2011-09-20 21:44:10 +0000[diff] [blame]334 s->Printf("DW_OP_plus_uconst(0x%llx) ", m_data.GetULEB128(&offset));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]335 break;
336
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]337 case DW_OP_shl: s->PutCString("DW_OP_shl"); break; // 0x24
338 case DW_OP_shr: s->PutCString("DW_OP_shr"); break; // 0x25
339 case DW_OP_shra: s->PutCString("DW_OP_shra"); break; // 0x26
340 case DW_OP_xor: s->PutCString("DW_OP_xor"); break; // 0x27
341 case DW_OP_skip: s->Printf("DW_OP_skip(0x%4.4x)", m_data.GetU16(&offset)); break; // 0x2f 1 signed 2-byte constant
342 case DW_OP_bra: s->Printf("DW_OP_bra(0x%4.4x)", m_data.GetU16(&offset)); break; // 0x28 1 signed 2-byte constant
343 case DW_OP_eq: s->PutCString("DW_OP_eq"); break; // 0x29
344 case DW_OP_ge: s->PutCString("DW_OP_ge"); break; // 0x2a
345 case DW_OP_gt: s->PutCString("DW_OP_gt"); break; // 0x2b
346 case DW_OP_le: s->PutCString("DW_OP_le"); break; // 0x2c
347 case DW_OP_lt: s->PutCString("DW_OP_lt"); break; // 0x2d
348 case DW_OP_ne: s->PutCString("DW_OP_ne"); break; // 0x2e
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]349
350 case DW_OP_lit0: // 0x30
351 case DW_OP_lit1: // 0x31
352 case DW_OP_lit2: // 0x32
353 case DW_OP_lit3: // 0x33
354 case DW_OP_lit4: // 0x34
355 case DW_OP_lit5: // 0x35
356 case DW_OP_lit6: // 0x36
357 case DW_OP_lit7: // 0x37
358 case DW_OP_lit8: // 0x38
359 case DW_OP_lit9: // 0x39
360 case DW_OP_lit10: // 0x3A
361 case DW_OP_lit11: // 0x3B
362 case DW_OP_lit12: // 0x3C
363 case DW_OP_lit13: // 0x3D
364 case DW_OP_lit14: // 0x3E
365 case DW_OP_lit15: // 0x3F
366 case DW_OP_lit16: // 0x40
367 case DW_OP_lit17: // 0x41
368 case DW_OP_lit18: // 0x42
369 case DW_OP_lit19: // 0x43
370 case DW_OP_lit20: // 0x44
371 case DW_OP_lit21: // 0x45
372 case DW_OP_lit22: // 0x46
373 case DW_OP_lit23: // 0x47
374 case DW_OP_lit24: // 0x48
375 case DW_OP_lit25: // 0x49
376 case DW_OP_lit26: // 0x4A
377 case DW_OP_lit27: // 0x4B
378 case DW_OP_lit28: // 0x4C
379 case DW_OP_lit29: // 0x4D
380 case DW_OP_lit30: // 0x4E
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]381 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]382
383 case DW_OP_reg0: // 0x50
384 case DW_OP_reg1: // 0x51
385 case DW_OP_reg2: // 0x52
386 case DW_OP_reg3: // 0x53
387 case DW_OP_reg4: // 0x54
388 case DW_OP_reg5: // 0x55
389 case DW_OP_reg6: // 0x56
390 case DW_OP_reg7: // 0x57
391 case DW_OP_reg8: // 0x58
392 case DW_OP_reg9: // 0x59
393 case DW_OP_reg10: // 0x5A
394 case DW_OP_reg11: // 0x5B
395 case DW_OP_reg12: // 0x5C
396 case DW_OP_reg13: // 0x5D
397 case DW_OP_reg14: // 0x5E
398 case DW_OP_reg15: // 0x5F
399 case DW_OP_reg16: // 0x60
400 case DW_OP_reg17: // 0x61
401 case DW_OP_reg18: // 0x62
402 case DW_OP_reg19: // 0x63
403 case DW_OP_reg20: // 0x64
404 case DW_OP_reg21: // 0x65
405 case DW_OP_reg22: // 0x66
406 case DW_OP_reg23: // 0x67
407 case DW_OP_reg24: // 0x68
408 case DW_OP_reg25: // 0x69
409 case DW_OP_reg26: // 0x6A
410 case DW_OP_reg27: // 0x6B
411 case DW_OP_reg28: // 0x6C
412 case DW_OP_reg29: // 0x6D
413 case DW_OP_reg30: // 0x6E
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]414 case DW_OP_reg31: // 0x6F
415 {
416 uint32_t reg_num = op - DW_OP_reg0;
417 if (abi)
418 {
419 RegisterInfo reg_info;
420 if (abi->GetRegisterInfoByKind(m_reg_kind, reg_num, reg_info))
421 {
422 if (reg_info.name)
423 {
424 s->PutCString (reg_info.name);
425 break;
426 }
427 else if (reg_info.alt_name)
428 {
429 s->PutCString (reg_info.alt_name);
430 break;
431 }
432 }
433 }
434 s->Printf("DW_OP_reg%u", reg_num); break;
435 }
436 break;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]437
438 case DW_OP_breg0:
439 case DW_OP_breg1:
440 case DW_OP_breg2:
441 case DW_OP_breg3:
442 case DW_OP_breg4:
443 case DW_OP_breg5:
444 case DW_OP_breg6:
445 case DW_OP_breg7:
446 case DW_OP_breg8:
447 case DW_OP_breg9:
448 case DW_OP_breg10:
449 case DW_OP_breg11:
450 case DW_OP_breg12:
451 case DW_OP_breg13:
452 case DW_OP_breg14:
453 case DW_OP_breg15:
454 case DW_OP_breg16:
455 case DW_OP_breg17:
456 case DW_OP_breg18:
457 case DW_OP_breg19:
458 case DW_OP_breg20:
459 case DW_OP_breg21:
460 case DW_OP_breg22:
461 case DW_OP_breg23:
462 case DW_OP_breg24:
463 case DW_OP_breg25:
464 case DW_OP_breg26:
465 case DW_OP_breg27:
466 case DW_OP_breg28:
467 case DW_OP_breg29:
468 case DW_OP_breg30:
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]469 case DW_OP_breg31:
470 {
471 uint32_t reg_num = op - DW_OP_breg0;
472 int64_t reg_offset = m_data.GetSLEB128(&offset);
473 if (abi)
474 {
475 RegisterInfo reg_info;
476 if (abi->GetRegisterInfoByKind(m_reg_kind, reg_num, reg_info))
477 {
478 if (reg_info.name)
479 {
480 s->Printf("[%s%+lli]", reg_info.name, reg_offset);
481 break;
482 }
483 else if (reg_info.alt_name)
484 {
485 s->Printf("[%s%+lli]", reg_info.alt_name, reg_offset);
486 break;
487 }
488 }
489 }
490 s->Printf("DW_OP_breg%i(0x%llx)", reg_num, reg_offset);
491 }
492 break;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]493
494 case DW_OP_regx: // 0x90 1 ULEB128 register
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]495 {
496 uint64_t reg_num = m_data.GetULEB128(&offset);
497 if (abi)
498 {
499 RegisterInfo reg_info;
500 if (abi->GetRegisterInfoByKind(m_reg_kind, reg_num, reg_info))
501 {
502 if (reg_info.name)
503 {
504 s->PutCString (reg_info.name);
505 break;
506 }
507 else if (reg_info.alt_name)
508 {
509 s->PutCString (reg_info.alt_name);
510 break;
511 }
512 }
513 }
514 s->Printf("DW_OP_regx(%llu)", reg_num); break;
515 }
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]516 break;
517 case DW_OP_fbreg: // 0x91 1 SLEB128 offset
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]518 s->Printf("DW_OP_fbreg(%lli)",m_data.GetSLEB128(&offset));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]519 break;
520 case DW_OP_bregx: // 0x92 2 ULEB128 register followed by SLEB128 offset
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]521 {
522 uint32_t reg_num = m_data.GetULEB128(&offset);
523 int64_t reg_offset = m_data.GetSLEB128(&offset);
524 if (abi)
525 {
526 RegisterInfo reg_info;
527 if (abi->GetRegisterInfoByKind(m_reg_kind, reg_num, reg_info))
528 {
529 if (reg_info.name)
530 {
531 s->Printf("[%s%+lli]", reg_info.name, reg_offset);
532 break;
533 }
534 else if (reg_info.alt_name)
535 {
536 s->Printf("[%s%+lli]", reg_info.alt_name, reg_offset);
537 break;
538 }
539 }
540 }
541 s->Printf("DW_OP_bregx(reg=%u,offset=%lli)", reg_num, reg_offset);
542 }
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]543 break;
544 case DW_OP_piece: // 0x93 1 ULEB128 size of piece addressed
Jason Molenda7e5fa7f2011-09-20 21:44:10 +0000[diff] [blame]545 s->Printf("DW_OP_piece(0x%llx)", m_data.GetULEB128(&offset));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]546 break;
547 case DW_OP_deref_size: // 0x94 1 1-byte size of data retrieved
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]548 s->Printf("DW_OP_deref_size(0x%2.2x)", m_data.GetU8(&offset));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]549 break;
550 case DW_OP_xderef_size: // 0x95 1 1-byte size of data retrieved
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]551 s->Printf("DW_OP_xderef_size(0x%2.2x)", m_data.GetU8(&offset));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]552 break;
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]553 case DW_OP_nop: s->PutCString("DW_OP_nop"); break; // 0x96
554 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]555 case DW_OP_call2: // 0x98 DWARF3 1 2-byte offset of DIE
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]556 s->Printf("DW_OP_call2(0x%4.4x)", m_data.GetU16(&offset));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]557 break;
558 case DW_OP_call4: // 0x99 DWARF3 1 4-byte offset of DIE
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]559 s->Printf("DW_OP_call4(0x%8.8x)", m_data.GetU32(&offset));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]560 break;
561 case DW_OP_call_ref: // 0x9a DWARF3 1 4- or 8-byte offset of DIE
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]562 s->Printf("DW_OP_call_ref(0x%8.8llx)", m_data.GetAddress(&offset));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]563 break;
564// case DW_OP_form_tls_address: s << "form_tls_address"; break; // 0x9b DWARF3
565// case DW_OP_call_frame_cfa: s << "call_frame_cfa"; break; // 0x9c DWARF3
566// case DW_OP_bit_piece: // 0x9d DWARF3 2
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]567// 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]568// break;
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]569// case DW_OP_lo_user: s->PutCString("DW_OP_lo_user"); break; // 0xe0
570// case DW_OP_hi_user: s->PutCString("DW_OP_hi_user"); break; // 0xff
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]571// case DW_OP_APPLE_extern:
572// s->Printf("DW_OP_APPLE_extern(%llu)", m_data.GetULEB128(&offset));
573// break;
574// case DW_OP_APPLE_array_ref:
575// s->PutCString("DW_OP_APPLE_array_ref");
576// break;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]577 case DW_OP_APPLE_uninit:
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]578 s->PutCString("DW_OP_APPLE_uninit"); // 0xF0
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]579 break;
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]580// case DW_OP_APPLE_assign: // 0xF1 - pops value off and assigns it to second item on stack (2nd item must have assignable context)
581// s->PutCString("DW_OP_APPLE_assign");
582// break;
583// 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)
584// s->PutCString("DW_OP_APPLE_address_of");
585// break;
586// 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)
587// s->PutCString("DW_OP_APPLE_value_of");
588// break;
589// 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)
590// s->PutCString("DW_OP_APPLE_deref_type");
591// break;
592// case DW_OP_APPLE_expr_local: // 0xF5 - ULEB128 expression local index
593// s->Printf("DW_OP_APPLE_expr_local(%llu)", m_data.GetULEB128(&offset));
594// break;
595// case DW_OP_APPLE_constf: // 0xF6 - 1 byte float size, followed by constant float data
596// {
597// uint8_t float_length = m_data.GetU8(&offset);
598// s->Printf("DW_OP_APPLE_constf(<%u> ", float_length);
599// m_data.Dump(s, offset, eFormatHex, float_length, 1, UINT32_MAX, DW_INVALID_ADDRESS, 0, 0);
600// s->PutChar(')');
601// // Consume the float data
602// m_data.GetData(&offset, float_length);
603// }
604// break;
605// case DW_OP_APPLE_scalar_cast:
606// s->Printf("DW_OP_APPLE_scalar_cast(%s)", Scalar::GetValueTypeAsCString ((Scalar::Type)m_data.GetU8(&offset)));
607// break;
608// case DW_OP_APPLE_clang_cast:
609// {
610// clang::Type *clang_type = (clang::Type *)m_data.GetMaxU64(&offset, sizeof(void*));
611// s->Printf("DW_OP_APPLE_clang_cast(%p)", clang_type);
612// }
613// break;
614// case DW_OP_APPLE_clear:
615// s->PutCString("DW_OP_APPLE_clear");
616// break;
617// case DW_OP_APPLE_error: // 0xFF - Stops expression evaluation and returns an error (no args)
618// s->PutCString("DW_OP_APPLE_error");
619// break;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]620 }
621 }
622}
623
624void
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]625DWARFExpression::SetLocationListSlide (addr_t slide)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]626{
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]627 m_loclist_slide = slide;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]628}
629
630int
631DWARFExpression::GetRegisterKind ()
632{
633 return m_reg_kind;
634}
635
636void
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]637DWARFExpression::SetRegisterKind (RegisterKind reg_kind)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]638{
639 m_reg_kind = reg_kind;
640}
641
642bool
643DWARFExpression::IsLocationList() const
644{
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]645 return m_loclist_slide != LLDB_INVALID_ADDRESS;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]646}
647
648void
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]649DWARFExpression::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]650{
651 if (IsLocationList())
652 {
653 // We have a location list
654 uint32_t offset = 0;
655 uint32_t count = 0;
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]656 addr_t curr_base_addr = location_list_base_addr;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]657 while (m_data.ValidOffset(offset))
658 {
659 lldb::addr_t begin_addr_offset = m_data.GetAddress(&offset);
660 lldb::addr_t end_addr_offset = m_data.GetAddress(&offset);
661 if (begin_addr_offset < end_addr_offset)
662 {
663 if (count > 0)
664 s->PutCString(", ");
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]665 VMRange addr_range(curr_base_addr + begin_addr_offset, curr_base_addr + end_addr_offset);
666 addr_range.Dump(s, 0, 8);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]667 s->PutChar('{');
668 uint32_t location_length = m_data.GetU16(&offset);
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]669 DumpLocation (s, offset, location_length, level, abi);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]670 s->PutChar('}');
671 offset += location_length;
672 }
673 else if (begin_addr_offset == 0 && end_addr_offset == 0)
674 {
675 // The end of the location list is marked by both the start and end offset being zero
676 break;
677 }
678 else
679 {
Greg Claytonb3448432011-03-24 21:19:54 +0000[diff] [blame]680 if ((m_data.GetAddressByteSize() == 4 && (begin_addr_offset == UINT32_MAX)) ||
681 (m_data.GetAddressByteSize() == 8 && (begin_addr_offset == UINT64_MAX)))
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]682 {
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]683 curr_base_addr = end_addr_offset + location_list_base_addr;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]684 // We have a new base address
685 if (count > 0)
686 s->PutCString(", ");
687 *s << "base_addr = " << end_addr_offset;
688 }
689 }
690
691 count++;
692 }
693 }
694 else
695 {
696 // We have a normal location that contains DW_OP location opcodes
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]697 DumpLocation (s, 0, m_data.GetByteSize(), level, abi);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]698 }
699}
700
701static bool
702ReadRegisterValueAsScalar
703(
Greg Clayton061b79d2011-05-09 20:18:18 +0000[diff] [blame]704 RegisterContext *reg_ctx,
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]705 uint32_t reg_kind,
706 uint32_t reg_num,
707 Error *error_ptr,
708 Value &value
709)
710{
Greg Clayton061b79d2011-05-09 20:18:18 +0000[diff] [blame]711 if (reg_ctx == NULL)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]712 {
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]713 if (error_ptr)
714 error_ptr->SetErrorStringWithFormat("No register context in frame.\n");
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]715 }
716 else
717 {
Greg Clayton061b79d2011-05-09 20:18:18 +0000[diff] [blame]718 uint32_t native_reg = reg_ctx->ConvertRegisterKindToRegisterNumber(reg_kind, reg_num);
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]719 if (native_reg == LLDB_INVALID_REGNUM)
720 {
721 if (error_ptr)
722 error_ptr->SetErrorStringWithFormat("Unable to convert register kind=%u reg_num=%u to a native register number.\n", reg_kind, reg_num);
723 }
724 else
725 {
Greg Clayton061b79d2011-05-09 20:18:18 +0000[diff] [blame]726 const RegisterInfo *reg_info = reg_ctx->GetRegisterInfoAtIndex(native_reg);
727 RegisterValue reg_value;
728 if (reg_ctx->ReadRegister (reg_info, reg_value))
729 {
730 if (reg_value.GetScalarValue(value.GetScalar()))
731 {
732 value.SetValueType (Value::eValueTypeScalar);
Greg Clayton82f07462011-05-30 00:49:24 +0000[diff] [blame]733 value.SetContext (Value::eContextTypeRegisterInfo,
734 const_cast<RegisterInfo *>(reg_info));
Greg Clayton061b79d2011-05-09 20:18:18 +0000[diff] [blame]735 if (error_ptr)
736 error_ptr->Clear();
737 return true;
738 }
739 else
740 {
Greg Clayton82f07462011-05-30 00:49:24 +0000[diff] [blame]741 // If we get this error, then we need to implement a value
742 // buffer in the dwarf expression evaluation function...
Greg Clayton061b79d2011-05-09 20:18:18 +0000[diff] [blame]743 if (error_ptr)
Greg Clayton82f07462011-05-30 00:49:24 +0000[diff] [blame]744 error_ptr->SetErrorStringWithFormat ("register %s can't be converted to a scalar value",
745 reg_info->name);
Greg Clayton061b79d2011-05-09 20:18:18 +0000[diff] [blame]746 }
747 }
748 else
749 {
750 if (error_ptr)
Greg Clayton82f07462011-05-30 00:49:24 +0000[diff] [blame]751 error_ptr->SetErrorStringWithFormat("register %s is not available", reg_info->name);
Greg Clayton061b79d2011-05-09 20:18:18 +0000[diff] [blame]752 }
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]753 }
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]754 }
755 return false;
756}
757
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]758//bool
759//DWARFExpression::LocationListContainsLoadAddress (Process* process, const Address &addr) const
760//{
761// return LocationListContainsLoadAddress(process, addr.GetLoadAddress(process));
762//}
763//
764//bool
765//DWARFExpression::LocationListContainsLoadAddress (Process* process, addr_t load_addr) const
766//{
767// if (load_addr == LLDB_INVALID_ADDRESS)
768// return false;
769//
770// if (IsLocationList())
771// {
772// uint32_t offset = 0;
773//
774// addr_t loc_list_base_addr = m_loclist_slide.GetLoadAddress(process);
775//
776// if (loc_list_base_addr == LLDB_INVALID_ADDRESS)
777// return false;
778//
779// while (m_data.ValidOffset(offset))
780// {
781// // We need to figure out what the value is for the location.
782// addr_t lo_pc = m_data.GetAddress(&offset);
783// addr_t hi_pc = m_data.GetAddress(&offset);
784// if (lo_pc == 0 && hi_pc == 0)
785// break;
786// else
787// {
788// lo_pc += loc_list_base_addr;
789// hi_pc += loc_list_base_addr;
790//
791// if (lo_pc <= load_addr && load_addr < hi_pc)
792// return true;
793//
794// offset += m_data.GetU16(&offset);
795// }
796// }
797// }
798// return false;
799//}
Greg Claytonb04e7a82010-08-24 21:05:24 +0000[diff] [blame]800
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]801static uint32_t
802GetOpcodeDataSize (const DataExtractor &data, const uint32_t data_offset, const uint8_t op)
803{
804 uint32_t offset = data_offset;
805 switch (op)
806 {
807 case DW_OP_addr:
808 case DW_OP_call_ref: // 0x9a 1 address sized offset of DIE (DWARF3)
809 return data.GetAddressByteSize();
810
811 // Opcodes with no arguments
812 case DW_OP_deref: // 0x06
813 case DW_OP_dup: // 0x12
814 case DW_OP_drop: // 0x13
815 case DW_OP_over: // 0x14
816 case DW_OP_swap: // 0x16
817 case DW_OP_rot: // 0x17
818 case DW_OP_xderef: // 0x18
819 case DW_OP_abs: // 0x19
820 case DW_OP_and: // 0x1a
821 case DW_OP_div: // 0x1b
822 case DW_OP_minus: // 0x1c
823 case DW_OP_mod: // 0x1d
824 case DW_OP_mul: // 0x1e
825 case DW_OP_neg: // 0x1f
826 case DW_OP_not: // 0x20
827 case DW_OP_or: // 0x21
828 case DW_OP_plus: // 0x22
829 case DW_OP_shl: // 0x24
830 case DW_OP_shr: // 0x25
831 case DW_OP_shra: // 0x26
832 case DW_OP_xor: // 0x27
833 case DW_OP_eq: // 0x29
834 case DW_OP_ge: // 0x2a
835 case DW_OP_gt: // 0x2b
836 case DW_OP_le: // 0x2c
837 case DW_OP_lt: // 0x2d
838 case DW_OP_ne: // 0x2e
839 case DW_OP_lit0: // 0x30
840 case DW_OP_lit1: // 0x31
841 case DW_OP_lit2: // 0x32
842 case DW_OP_lit3: // 0x33
843 case DW_OP_lit4: // 0x34
844 case DW_OP_lit5: // 0x35
845 case DW_OP_lit6: // 0x36
846 case DW_OP_lit7: // 0x37
847 case DW_OP_lit8: // 0x38
848 case DW_OP_lit9: // 0x39
849 case DW_OP_lit10: // 0x3A
850 case DW_OP_lit11: // 0x3B
851 case DW_OP_lit12: // 0x3C
852 case DW_OP_lit13: // 0x3D
853 case DW_OP_lit14: // 0x3E
854 case DW_OP_lit15: // 0x3F
855 case DW_OP_lit16: // 0x40
856 case DW_OP_lit17: // 0x41
857 case DW_OP_lit18: // 0x42
858 case DW_OP_lit19: // 0x43
859 case DW_OP_lit20: // 0x44
860 case DW_OP_lit21: // 0x45
861 case DW_OP_lit22: // 0x46
862 case DW_OP_lit23: // 0x47
863 case DW_OP_lit24: // 0x48
864 case DW_OP_lit25: // 0x49
865 case DW_OP_lit26: // 0x4A
866 case DW_OP_lit27: // 0x4B
867 case DW_OP_lit28: // 0x4C
868 case DW_OP_lit29: // 0x4D
869 case DW_OP_lit30: // 0x4E
870 case DW_OP_lit31: // 0x4f
871 case DW_OP_reg0: // 0x50
872 case DW_OP_reg1: // 0x51
873 case DW_OP_reg2: // 0x52
874 case DW_OP_reg3: // 0x53
875 case DW_OP_reg4: // 0x54
876 case DW_OP_reg5: // 0x55
877 case DW_OP_reg6: // 0x56
878 case DW_OP_reg7: // 0x57
879 case DW_OP_reg8: // 0x58
880 case DW_OP_reg9: // 0x59
881 case DW_OP_reg10: // 0x5A
882 case DW_OP_reg11: // 0x5B
883 case DW_OP_reg12: // 0x5C
884 case DW_OP_reg13: // 0x5D
885 case DW_OP_reg14: // 0x5E
886 case DW_OP_reg15: // 0x5F
887 case DW_OP_reg16: // 0x60
888 case DW_OP_reg17: // 0x61
889 case DW_OP_reg18: // 0x62
890 case DW_OP_reg19: // 0x63
891 case DW_OP_reg20: // 0x64
892 case DW_OP_reg21: // 0x65
893 case DW_OP_reg22: // 0x66
894 case DW_OP_reg23: // 0x67
895 case DW_OP_reg24: // 0x68
896 case DW_OP_reg25: // 0x69
897 case DW_OP_reg26: // 0x6A
898 case DW_OP_reg27: // 0x6B
899 case DW_OP_reg28: // 0x6C
900 case DW_OP_reg29: // 0x6D
901 case DW_OP_reg30: // 0x6E
902 case DW_OP_reg31: // 0x6F
903 case DW_OP_nop: // 0x96
904 case DW_OP_push_object_address: // 0x97 DWARF3
905 case DW_OP_form_tls_address: // 0x9b DWARF3
906 case DW_OP_call_frame_cfa: // 0x9c DWARF3
907 return 0;
908
909 // Opcodes with a single 1 byte arguments
910 case DW_OP_const1u: // 0x08 1 1-byte constant
911 case DW_OP_const1s: // 0x09 1 1-byte constant
912 case DW_OP_pick: // 0x15 1 1-byte stack index
913 case DW_OP_deref_size: // 0x94 1 1-byte size of data retrieved
914 case DW_OP_xderef_size: // 0x95 1 1-byte size of data retrieved
915 return 1;
916
917 // Opcodes with a single 2 byte arguments
918 case DW_OP_const2u: // 0x0a 1 2-byte constant
919 case DW_OP_const2s: // 0x0b 1 2-byte constant
920 case DW_OP_skip: // 0x2f 1 signed 2-byte constant
921 case DW_OP_bra: // 0x28 1 signed 2-byte constant
922 case DW_OP_call2: // 0x98 1 2-byte offset of DIE (DWARF3)
923 return 2;
924
925 // Opcodes with a single 4 byte arguments
926 case DW_OP_const4u: // 0x0c 1 4-byte constant
927 case DW_OP_const4s: // 0x0d 1 4-byte constant
928 case DW_OP_call4: // 0x99 1 4-byte offset of DIE (DWARF3)
929 return 4;
930
931 // Opcodes with a single 8 byte arguments
932 case DW_OP_const8u: // 0x0e 1 8-byte constant
933 case DW_OP_const8s: // 0x0f 1 8-byte constant
934 return 8;
935
936 // All opcodes that have a single ULEB (signed or unsigned) argument
937 case DW_OP_constu: // 0x10 1 ULEB128 constant
938 case DW_OP_consts: // 0x11 1 SLEB128 constant
939 case DW_OP_plus_uconst: // 0x23 1 ULEB128 addend
940 case DW_OP_breg0: // 0x70 1 ULEB128 register
941 case DW_OP_breg1: // 0x71 1 ULEB128 register
942 case DW_OP_breg2: // 0x72 1 ULEB128 register
943 case DW_OP_breg3: // 0x73 1 ULEB128 register
944 case DW_OP_breg4: // 0x74 1 ULEB128 register
945 case DW_OP_breg5: // 0x75 1 ULEB128 register
946 case DW_OP_breg6: // 0x76 1 ULEB128 register
947 case DW_OP_breg7: // 0x77 1 ULEB128 register
948 case DW_OP_breg8: // 0x78 1 ULEB128 register
949 case DW_OP_breg9: // 0x79 1 ULEB128 register
950 case DW_OP_breg10: // 0x7a 1 ULEB128 register
951 case DW_OP_breg11: // 0x7b 1 ULEB128 register
952 case DW_OP_breg12: // 0x7c 1 ULEB128 register
953 case DW_OP_breg13: // 0x7d 1 ULEB128 register
954 case DW_OP_breg14: // 0x7e 1 ULEB128 register
955 case DW_OP_breg15: // 0x7f 1 ULEB128 register
956 case DW_OP_breg16: // 0x80 1 ULEB128 register
957 case DW_OP_breg17: // 0x81 1 ULEB128 register
958 case DW_OP_breg18: // 0x82 1 ULEB128 register
959 case DW_OP_breg19: // 0x83 1 ULEB128 register
960 case DW_OP_breg20: // 0x84 1 ULEB128 register
961 case DW_OP_breg21: // 0x85 1 ULEB128 register
962 case DW_OP_breg22: // 0x86 1 ULEB128 register
963 case DW_OP_breg23: // 0x87 1 ULEB128 register
964 case DW_OP_breg24: // 0x88 1 ULEB128 register
965 case DW_OP_breg25: // 0x89 1 ULEB128 register
966 case DW_OP_breg26: // 0x8a 1 ULEB128 register
967 case DW_OP_breg27: // 0x8b 1 ULEB128 register
968 case DW_OP_breg28: // 0x8c 1 ULEB128 register
969 case DW_OP_breg29: // 0x8d 1 ULEB128 register
970 case DW_OP_breg30: // 0x8e 1 ULEB128 register
971 case DW_OP_breg31: // 0x8f 1 ULEB128 register
972 case DW_OP_regx: // 0x90 1 ULEB128 register
973 case DW_OP_fbreg: // 0x91 1 SLEB128 offset
974 case DW_OP_piece: // 0x93 1 ULEB128 size of piece addressed
975 data.Skip_LEB128(&offset);
976 return offset - data_offset;
977
978 // All opcodes that have a 2 ULEB (signed or unsigned) arguments
979 case DW_OP_bregx: // 0x92 2 ULEB128 register followed by SLEB128 offset
980 case DW_OP_bit_piece: // 0x9d ULEB128 bit size, ULEB128 bit offset (DWARF3);
981 data.Skip_LEB128(&offset);
982 data.Skip_LEB128(&offset);
983 return offset - data_offset;
984 default:
985 assert (!"Unhandled DW_OP_XXX opcode, add support for it");
986 break;
987 }
988 return UINT32_MAX;
989}
990
991bool
992DWARFExpression::LocationContains_DW_OP_addr (lldb::addr_t file_addr) const
993{
994 if (IsLocationList())
995 return false;
996 uint32_t offset = 0;
997 while (m_data.ValidOffset(offset))
998 {
999 const uint8_t op = m_data.GetU8(&offset);
1000
1001 if (op == DW_OP_addr)
1002 {
1003 if (file_addr == LLDB_INVALID_ADDRESS)
1004 return true;
1005 addr_t op_file_addr = m_data.GetAddress(&offset);
1006 if (op_file_addr == file_addr)
1007 return true;
1008 }
1009 else
1010 {
1011 const uint32_t op_arg_size = GetOpcodeDataSize (m_data, offset, op);
1012 if (op_arg_size == UINT32_MAX)
1013 break;
1014 offset += op_arg_size;
1015 }
1016 }
1017 return false;
1018}
1019
1020bool
1021DWARFExpression::Update_DW_OP_addr (lldb::addr_t file_addr)
1022{
1023 if (IsLocationList())
1024 return false;
1025 uint32_t offset = 0;
1026 while (m_data.ValidOffset(offset))
1027 {
1028 const uint8_t op = m_data.GetU8(&offset);
1029
1030 if (op == DW_OP_addr)
1031 {
1032 const uint8_t addr_byte_size = m_data.GetAddressByteSize();
1033 // We have to make a copy of the data as we don't know if this
1034 // data is from a read only memory mapped buffer, so we duplicate
1035 // all of the data first, then modify it, and if all goes well,
1036 // we then replace the data for this expression
1037
1038 // So first we copy the data into a heap buffer
1039 std::auto_ptr<DataBufferHeap> head_data_ap (new DataBufferHeap (m_data.GetDataStart(),
1040 m_data.GetByteSize()));
1041
1042 // Make en encoder so we can write the address into the buffer using
1043 // the correct byte order (endianness)
1044 DataEncoder encoder (head_data_ap->GetBytes(),
1045 head_data_ap->GetByteSize(),
1046 m_data.GetByteOrder(),
1047 addr_byte_size);
1048
1049 // Replace the address in the new buffer
1050 if (encoder.PutMaxU64 (offset, addr_byte_size, file_addr) == UINT32_MAX)
1051 return false;
1052
1053 // All went well, so now we can reset the data using a shared
1054 // pointer to the heap data so "m_data" will now correctly
1055 // manage the heap data.
1056 m_data.SetData (DataBufferSP (head_data_ap.release()));
1057 return true;
1058 }
1059 else
1060 {
1061 const uint32_t op_arg_size = GetOpcodeDataSize (m_data, offset, op);
1062 if (op_arg_size == UINT32_MAX)
1063 break;
1064 offset += op_arg_size;
1065 }
1066 }
1067 return false;
1068}
1069
Greg Claytonb04e7a82010-08-24 21:05:24 +0000[diff] [blame]1070bool
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1071DWARFExpression::LocationListContainsAddress (lldb::addr_t loclist_base_addr, lldb::addr_t addr) const
Greg Claytonb04e7a82010-08-24 21:05:24 +0000[diff] [blame]1072{
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1073 if (addr == LLDB_INVALID_ADDRESS)
Greg Claytonb04e7a82010-08-24 21:05:24 +0000[diff] [blame]1074 return false;
1075
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1076 if (IsLocationList())
1077 {
1078 uint32_t offset = 0;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1079
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1080 if (loclist_base_addr == LLDB_INVALID_ADDRESS)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1081 return false;
1082
1083 while (m_data.ValidOffset(offset))
1084 {
1085 // We need to figure out what the value is for the location.
1086 addr_t lo_pc = m_data.GetAddress(&offset);
1087 addr_t hi_pc = m_data.GetAddress(&offset);
1088 if (lo_pc == 0 && hi_pc == 0)
1089 break;
1090 else
1091 {
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1092 lo_pc += loclist_base_addr - m_loclist_slide;
1093 hi_pc += loclist_base_addr - m_loclist_slide;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1094
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1095 if (lo_pc <= addr && addr < hi_pc)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1096 return true;
1097
1098 offset += m_data.GetU16(&offset);
1099 }
1100 }
1101 }
1102 return false;
1103}
Greg Claytonb04e7a82010-08-24 21:05:24 +0000[diff] [blame]1104
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1105bool
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]1106DWARFExpression::GetLocation (addr_t base_addr, addr_t pc, uint32_t &offset, uint32_t &length)
1107{
1108 offset = 0;
1109 if (!IsLocationList())
1110 {
1111 length = m_data.GetByteSize();
1112 return true;
1113 }
1114
1115 if (base_addr != LLDB_INVALID_ADDRESS && pc != LLDB_INVALID_ADDRESS)
1116 {
1117 addr_t curr_base_addr = base_addr;
1118
1119 while (m_data.ValidOffset(offset))
1120 {
1121 // We need to figure out what the value is for the location.
1122 addr_t lo_pc = m_data.GetAddress(&offset);
1123 addr_t hi_pc = m_data.GetAddress(&offset);
1124 if (lo_pc == 0 && hi_pc == 0)
1125 {
1126 break;
1127 }
1128 else
1129 {
1130 lo_pc += curr_base_addr - m_loclist_slide;
1131 hi_pc += curr_base_addr - m_loclist_slide;
1132
1133 length = m_data.GetU16(&offset);
1134
1135 if (length > 0 && lo_pc <= pc && pc < hi_pc)
1136 return true;
1137
1138 offset += length;
1139 }
1140 }
1141 }
1142 offset = UINT32_MAX;
1143 length = 0;
1144 return false;
1145}
1146
1147bool
1148DWARFExpression::DumpLocationForAddress (Stream *s,
1149 lldb::DescriptionLevel level,
1150 addr_t base_addr,
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]1151 addr_t address,
1152 ABI *abi)
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]1153{
1154 uint32_t offset = 0;
1155 uint32_t length = 0;
1156
1157 if (GetLocation (base_addr, address, offset, length))
1158 {
1159 if (length > 0)
1160 {
Greg Clayton5c3861d2011-09-02 01:15:17 +0000[diff] [blame]1161 DumpLocation(s, offset, length, level, abi);
Greg Clayton9b82f862011-07-11 05:12:02 +0000[diff] [blame]1162 return true;
1163 }
1164 }
1165 return false;
1166}
1167
1168bool
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1169DWARFExpression::Evaluate
1170(
1171 ExecutionContextScope *exe_scope,
1172 clang::ASTContext *ast_context,
Greg Claytonbdcb6ab2011-01-25 23:55:37 +0000[diff] [blame]1173 ClangExpressionVariableList *expr_locals,
1174 ClangExpressionDeclMap *decl_map,
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1175 lldb::addr_t loclist_base_load_addr,
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1176 const Value* initial_value_ptr,
1177 Value& result,
1178 Error *error_ptr
1179) const
1180{
1181 ExecutionContext exe_ctx (exe_scope);
Greg Claytonbdcb6ab2011-01-25 23:55:37 +0000[diff] [blame]1182 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]1183}
1184
1185bool
1186DWARFExpression::Evaluate
1187(
1188 ExecutionContext *exe_ctx,
1189 clang::ASTContext *ast_context,
Greg Claytonbdcb6ab2011-01-25 23:55:37 +0000[diff] [blame]1190 ClangExpressionVariableList *expr_locals,
1191 ClangExpressionDeclMap *decl_map,
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]1192 RegisterContext *reg_ctx,
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1193 lldb::addr_t loclist_base_load_addr,
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1194 const Value* initial_value_ptr,
1195 Value& result,
1196 Error *error_ptr
1197) const
1198{
1199 if (IsLocationList())
1200 {
1201 uint32_t offset = 0;
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]1202 addr_t pc;
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]1203 StackFrame *frame = NULL;
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]1204 if (reg_ctx)
1205 pc = reg_ctx->GetPC();
1206 else
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]1207 {
1208 frame = exe_ctx->GetFramePtr();
1209 pc = frame->GetRegisterContext()->GetPC();
1210 }
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1211
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1212 if (loclist_base_load_addr != LLDB_INVALID_ADDRESS)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1213 {
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1214 if (pc == LLDB_INVALID_ADDRESS)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1215 {
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1216 if (error_ptr)
1217 error_ptr->SetErrorString("Invalid PC in frame.");
1218 return false;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1219 }
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1220
1221 addr_t curr_loclist_base_load_addr = loclist_base_load_addr;
1222
1223 while (m_data.ValidOffset(offset))
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1224 {
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1225 // We need to figure out what the value is for the location.
1226 addr_t lo_pc = m_data.GetAddress(&offset);
1227 addr_t hi_pc = m_data.GetAddress(&offset);
1228 if (lo_pc == 0 && hi_pc == 0)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1229 {
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1230 break;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1231 }
Greg Clayton178710c2010-09-14 02:20:48 +0000[diff] [blame]1232 else
1233 {
1234 lo_pc += curr_loclist_base_load_addr - m_loclist_slide;
1235 hi_pc += curr_loclist_base_load_addr - m_loclist_slide;
1236
1237 uint16_t length = m_data.GetU16(&offset);
1238
1239 if (length > 0 && lo_pc <= pc && pc < hi_pc)
1240 {
Greg Claytonbdcb6ab2011-01-25 23:55:37 +0000[diff] [blame]1241 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]1242 }
1243 offset += length;
1244 }
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1245 }
1246 }
1247 if (error_ptr)
Greg Clayton82f07462011-05-30 00:49:24 +0000[diff] [blame]1248 error_ptr->SetErrorString ("variable not available");
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1249 return false;
1250 }
1251
1252 // Not a location list, just a single expression.
Greg Claytonbdcb6ab2011-01-25 23:55:37 +0000[diff] [blame]1253 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]1254}
1255
1256
1257
1258bool
1259DWARFExpression::Evaluate
1260(
1261 ExecutionContext *exe_ctx,
1262 clang::ASTContext *ast_context,
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1263 ClangExpressionVariableList *expr_locals,
1264 ClangExpressionDeclMap *decl_map,
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]1265 RegisterContext *reg_ctx,
Greg Claytonbdcb6ab2011-01-25 23:55:37 +0000[diff] [blame]1266 const DataExtractor& opcodes,
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1267 const uint32_t opcodes_offset,
1268 const uint32_t opcodes_length,
1269 const uint32_t reg_kind,
1270 const Value* initial_value_ptr,
1271 Value& result,
1272 Error *error_ptr
1273)
1274{
1275 std::vector<Value> stack;
1276
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]1277 Process *process = NULL;
1278 StackFrame *frame = NULL;
1279
1280 if (exe_ctx)
1281 {
1282 process = exe_ctx->GetProcessPtr();
1283 frame = exe_ctx->GetFramePtr();
1284 }
1285 if (reg_ctx == NULL && frame)
1286 reg_ctx = frame->GetRegisterContext().get();
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]1287
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1288 if (initial_value_ptr)
1289 stack.push_back(*initial_value_ptr);
1290
1291 uint32_t offset = opcodes_offset;
1292 const uint32_t end_offset = opcodes_offset + opcodes_length;
1293 Value tmp;
1294 uint32_t reg_num;
1295
1296 // Make sure all of the data is available in opcodes.
1297 if (!opcodes.ValidOffsetForDataOfSize(opcodes_offset, opcodes_length))
1298 {
1299 if (error_ptr)
1300 error_ptr->SetErrorString ("Invalid offset and/or length for opcodes buffer.");
1301 return false;
1302 }
Greg Claytone005f2c2010-11-06 01:53:30 +0000[diff] [blame]1303 LogSP log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1304
1305
1306 while (opcodes.ValidOffset(offset) && offset < end_offset)
1307 {
1308 const uint32_t op_offset = offset;
1309 const uint8_t op = opcodes.GetU8(&offset);
1310
Sean Callanan67bbb112011-10-14 20:34:21 +0000[diff] [blame]1311 if (log && log->GetVerbose())
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1312 {
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1313 size_t count = stack.size();
Jason Molenda7e5fa7f2011-09-20 21:44:10 +0000[diff] [blame]1314 log->Printf("Stack before operation has %lu values:", count);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1315 for (size_t i=0; i<count; ++i)
1316 {
1317 StreamString new_value;
1318 new_value.Printf("[%zu]", i);
1319 stack[i].Dump(&new_value);
Sean Callanan6184dfe2010-06-23 00:47:48 +0000[diff] [blame]1320 log->Printf(" %s", new_value.GetData());
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1321 }
1322 log->Printf("0x%8.8x: %s", op_offset, DW_OP_value_to_name(op));
1323 }
1324 switch (op)
1325 {
1326 //----------------------------------------------------------------------
1327 // The DW_OP_addr operation has a single operand that encodes a machine
1328 // address and whose size is the size of an address on the target machine.
1329 //----------------------------------------------------------------------
1330 case DW_OP_addr:
Greg Clayton801417e2011-07-07 01:59:51 +0000[diff] [blame]1331 stack.push_back(Scalar(opcodes.GetAddress(&offset)));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1332 stack.back().SetValueType (Value::eValueTypeFileAddress);
1333 break;
1334
1335 //----------------------------------------------------------------------
1336 // The DW_OP_addr_sect_offset4 is used for any location expressions in
1337 // shared libraries that have a location like:
1338 // DW_OP_addr(0x1000)
1339 // If this address resides in a shared library, then this virtual
1340 // address won't make sense when it is evaluated in the context of a
1341 // running process where shared libraries have been slid. To account for
1342 // this, this new address type where we can store the section pointer
1343 // and a 4 byte offset.
1344 //----------------------------------------------------------------------
1345// case DW_OP_addr_sect_offset4:
1346// {
1347// result_type = eResultTypeFileAddress;
1348// lldb::Section *sect = (lldb::Section *)opcodes.GetMaxU64(&offset, sizeof(void *));
1349// lldb::addr_t sect_offset = opcodes.GetU32(&offset);
1350//
1351// Address so_addr (sect, sect_offset);
1352// lldb::addr_t load_addr = so_addr.GetLoadAddress();
1353// if (load_addr != LLDB_INVALID_ADDRESS)
1354// {
1355// // We successfully resolve a file address to a load
1356// // address.
1357// stack.push_back(load_addr);
1358// break;
1359// }
1360// else
1361// {
1362// // We were able
1363// if (error_ptr)
1364// error_ptr->SetErrorStringWithFormat ("Section %s in %s is not currently loaded.\n", sect->GetName().AsCString(), sect->GetModule()->GetFileSpec().GetFilename().AsCString());
1365// return false;
1366// }
1367// }
1368// break;
1369
1370 //----------------------------------------------------------------------
1371 // OPCODE: DW_OP_deref
1372 // OPERANDS: none
1373 // DESCRIPTION: Pops the top stack entry and treats it as an address.
1374 // The value retrieved from that address is pushed. The size of the
1375 // data retrieved from the dereferenced address is the size of an
1376 // address on the target machine.
1377 //----------------------------------------------------------------------
1378 case DW_OP_deref:
1379 {
1380 Value::ValueType value_type = stack.back().GetValueType();
1381 switch (value_type)
1382 {
1383 case Value::eValueTypeHostAddress:
1384 {
1385 void *src = (void *)stack.back().GetScalar().ULongLong();
1386 intptr_t ptr;
1387 ::memcpy (&ptr, src, sizeof(void *));
1388 stack.back().GetScalar() = ptr;
1389 stack.back().ClearContext();
1390 }
1391 break;
1392 case Value::eValueTypeLoadAddress:
1393 if (exe_ctx)
1394 {
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]1395 if (process)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1396 {
1397 lldb::addr_t pointer_addr = stack.back().GetScalar().ULongLong(LLDB_INVALID_ADDRESS);
1398 uint8_t addr_bytes[sizeof(lldb::addr_t)];
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]1399 uint32_t addr_size = process->GetAddressByteSize();
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1400 Error error;
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]1401 if (process->ReadMemory(pointer_addr, &addr_bytes, addr_size, error) == addr_size)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1402 {
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]1403 DataExtractor addr_data(addr_bytes, sizeof(addr_bytes), process->GetByteOrder(), addr_size);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1404 uint32_t addr_data_offset = 0;
1405 stack.back().GetScalar() = addr_data.GetPointer(&addr_data_offset);
1406 stack.back().ClearContext();
1407 }
1408 else
1409 {
1410 if (error_ptr)
1411 error_ptr->SetErrorStringWithFormat ("Failed to dereference pointer from 0x%llx for DW_OP_deref: %s\n",
1412 pointer_addr,
1413 error.AsCString());
1414 return false;
1415 }
1416 }
1417 else
1418 {
1419 if (error_ptr)
1420 error_ptr->SetErrorStringWithFormat ("NULL process for DW_OP_deref.\n");
1421 return false;
1422 }
1423 }
1424 else
1425 {
1426 if (error_ptr)
1427 error_ptr->SetErrorStringWithFormat ("NULL execution context for DW_OP_deref.\n");
1428 return false;
1429 }
1430 break;
1431
1432 default:
1433 break;
1434 }
1435
1436 }
1437 break;
1438
1439 //----------------------------------------------------------------------
1440 // OPCODE: DW_OP_deref_size
1441 // OPERANDS: 1
1442 // 1 - uint8_t that specifies the size of the data to dereference.
1443 // DESCRIPTION: Behaves like the DW_OP_deref operation: it pops the top
1444 // stack entry and treats it as an address. The value retrieved from that
1445 // address is pushed. In the DW_OP_deref_size operation, however, the
1446 // size in bytes of the data retrieved from the dereferenced address is
1447 // specified by the single operand. This operand is a 1-byte unsigned
1448 // integral constant whose value may not be larger than the size of an
1449 // address on the target machine. The data retrieved is zero extended
1450 // to the size of an address on the target machine before being pushed
1451 // on the expression stack.
1452 //----------------------------------------------------------------------
1453 case DW_OP_deref_size:
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]1454 {
1455 uint8_t size = opcodes.GetU8(&offset);
1456 Value::ValueType value_type = stack.back().GetValueType();
1457 switch (value_type)
1458 {
1459 case Value::eValueTypeHostAddress:
1460 {
1461 void *src = (void *)stack.back().GetScalar().ULongLong();
1462 intptr_t ptr;
1463 ::memcpy (&ptr, src, sizeof(void *));
1464 // I can't decide whether the size operand should apply to the bytes in their
1465 // lldb-host endianness or the target endianness.. I doubt this'll ever come up
1466 // but I'll opt for assuming big endian regardless.
1467 switch (size)
1468 {
1469 case 1: ptr = ptr & 0xff; break;
1470 case 2: ptr = ptr & 0xffff; break;
1471 case 3: ptr = ptr & 0xffffff; break;
1472 case 4: ptr = ptr & 0xffffffff; break;
Jason Molendaa99bcaa2010-11-29 21:38:58 +0000[diff] [blame]1473 // the casts are added to work around the case where intptr_t is a 32 bit quantity;
1474 // presumably we won't hit the 5..7 cases if (void*) is 32-bits in this program.
1475 case 5: ptr = (intptr_t) ptr & 0xffffffffffULL; break;
1476 case 6: ptr = (intptr_t) ptr & 0xffffffffffffULL; break;
1477 case 7: ptr = (intptr_t) ptr & 0xffffffffffffffULL; break;
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]1478 default: break;
1479 }
1480 stack.back().GetScalar() = ptr;
1481 stack.back().ClearContext();
1482 }
1483 break;
1484 case Value::eValueTypeLoadAddress:
1485 if (exe_ctx)
1486 {
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]1487 if (process)
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]1488 {
1489 lldb::addr_t pointer_addr = stack.back().GetScalar().ULongLong(LLDB_INVALID_ADDRESS);
1490 uint8_t addr_bytes[sizeof(lldb::addr_t)];
1491 Error error;
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]1492 if (process->ReadMemory(pointer_addr, &addr_bytes, size, error) == size)
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]1493 {
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]1494 DataExtractor addr_data(addr_bytes, sizeof(addr_bytes), process->GetByteOrder(), size);
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]1495 uint32_t addr_data_offset = 0;
1496 switch (size)
1497 {
1498 case 1: stack.back().GetScalar() = addr_data.GetU8(&addr_data_offset); break;
1499 case 2: stack.back().GetScalar() = addr_data.GetU16(&addr_data_offset); break;
1500 case 4: stack.back().GetScalar() = addr_data.GetU32(&addr_data_offset); break;
1501 case 8: stack.back().GetScalar() = addr_data.GetU64(&addr_data_offset); break;
1502 default: stack.back().GetScalar() = addr_data.GetPointer(&addr_data_offset);
1503 }
1504 stack.back().ClearContext();
1505 }
1506 else
1507 {
1508 if (error_ptr)
1509 error_ptr->SetErrorStringWithFormat ("Failed to dereference pointer from 0x%llx for DW_OP_deref: %s\n",
1510 pointer_addr,
1511 error.AsCString());
1512 return false;
1513 }
1514 }
1515 else
1516 {
1517 if (error_ptr)
1518 error_ptr->SetErrorStringWithFormat ("NULL process for DW_OP_deref.\n");
1519 return false;
1520 }
1521 }
1522 else
1523 {
1524 if (error_ptr)
1525 error_ptr->SetErrorStringWithFormat ("NULL execution context for DW_OP_deref.\n");
1526 return false;
1527 }
1528 break;
1529
1530 default:
1531 break;
1532 }
1533
1534 }
1535 break;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1536
1537 //----------------------------------------------------------------------
1538 // OPCODE: DW_OP_xderef_size
1539 // OPERANDS: 1
1540 // 1 - uint8_t that specifies the size of the data to dereference.
1541 // DESCRIPTION: Behaves like the DW_OP_xderef operation: the entry at
1542 // the top of the stack is treated as an address. The second stack
Greg Clayton33ed1702010-08-24 00:45:41 +0000[diff] [blame]1543 // entry is treated as an "address space identifier" for those
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1544 // architectures that support multiple address spaces. The top two
1545 // stack elements are popped, a data item is retrieved through an
1546 // implementation-defined address calculation and pushed as the new
1547 // stack top. In the DW_OP_xderef_size operation, however, the size in
1548 // bytes of the data retrieved from the dereferenced address is
1549 // specified by the single operand. This operand is a 1-byte unsigned
1550 // integral constant whose value may not be larger than the size of an
1551 // address on the target machine. The data retrieved is zero extended
1552 // to the size of an address on the target machine before being pushed
1553 // on the expression stack.
1554 //----------------------------------------------------------------------
1555 case DW_OP_xderef_size:
1556 if (error_ptr)
1557 error_ptr->SetErrorString("Unimplemented opcode: DW_OP_xderef_size.");
1558 return false;
1559 //----------------------------------------------------------------------
1560 // OPCODE: DW_OP_xderef
1561 // OPERANDS: none
1562 // DESCRIPTION: Provides an extended dereference mechanism. The entry at
1563 // the top of the stack is treated as an address. The second stack entry
1564 // is treated as an "address space identifier" for those architectures
1565 // that support multiple address spaces. The top two stack elements are
1566 // popped, a data item is retrieved through an implementation-defined
1567 // address calculation and pushed as the new stack top. The size of the
1568 // data retrieved from the dereferenced address is the size of an address
1569 // on the target machine.
1570 //----------------------------------------------------------------------
1571 case DW_OP_xderef:
1572 if (error_ptr)
1573 error_ptr->SetErrorString("Unimplemented opcode: DW_OP_xderef.");
1574 return false;
1575
1576 //----------------------------------------------------------------------
1577 // All DW_OP_constXXX opcodes have a single operand as noted below:
1578 //
1579 // Opcode Operand 1
1580 // --------------- ----------------------------------------------------
1581 // DW_OP_const1u 1-byte unsigned integer constant
1582 // DW_OP_const1s 1-byte signed integer constant
1583 // DW_OP_const2u 2-byte unsigned integer constant
1584 // DW_OP_const2s 2-byte signed integer constant
1585 // DW_OP_const4u 4-byte unsigned integer constant
1586 // DW_OP_const4s 4-byte signed integer constant
1587 // DW_OP_const8u 8-byte unsigned integer constant
1588 // DW_OP_const8s 8-byte signed integer constant
1589 // DW_OP_constu unsigned LEB128 integer constant
1590 // DW_OP_consts signed LEB128 integer constant
1591 //----------------------------------------------------------------------
Greg Clayton801417e2011-07-07 01:59:51 +0000[diff] [blame]1592 case DW_OP_const1u : stack.push_back(Scalar(( uint8_t)opcodes.GetU8 (&offset))); break;
1593 case DW_OP_const1s : stack.push_back(Scalar(( int8_t)opcodes.GetU8 (&offset))); break;
1594 case DW_OP_const2u : stack.push_back(Scalar((uint16_t)opcodes.GetU16 (&offset))); break;
1595 case DW_OP_const2s : stack.push_back(Scalar(( int16_t)opcodes.GetU16 (&offset))); break;
1596 case DW_OP_const4u : stack.push_back(Scalar((uint32_t)opcodes.GetU32 (&offset))); break;
1597 case DW_OP_const4s : stack.push_back(Scalar(( int32_t)opcodes.GetU32 (&offset))); break;
1598 case DW_OP_const8u : stack.push_back(Scalar((uint64_t)opcodes.GetU64 (&offset))); break;
1599 case DW_OP_const8s : stack.push_back(Scalar(( int64_t)opcodes.GetU64 (&offset))); break;
1600 case DW_OP_constu : stack.push_back(Scalar(opcodes.GetULEB128 (&offset))); break;
1601 case DW_OP_consts : stack.push_back(Scalar(opcodes.GetSLEB128 (&offset))); break;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]1602
1603 //----------------------------------------------------------------------
1604 // OPCODE: DW_OP_dup
1605 // OPERANDS: none
1606 // DESCRIPTION: duplicates the value at the top of the stack
1607 //----------------------------------------------------------------------
1608 case DW_OP_dup:
1609 if (stack.empty())
1610 {
1611 if (error_ptr)
1612 error_ptr->SetErrorString("Expression stack empty for DW_OP_dup.");
1613 return false;
1614 }
1615 else
1616 stack.push_back(stack.back());
1617 break;
1618
1619 //----------------------------------------------------------------------
1620 // OPCODE: DW_OP_drop
1621 // OPERANDS: none
1622 // DESCRIPTION: pops the value at the top of the stack
1623 //----------------------------------------------------------------------
1624 case DW_OP_drop:
1625 if (stack.empty())
1626 {
1627 if (error_ptr)
1628 error_ptr->SetErrorString("Expression stack empty for DW_OP_drop.");
1629 return false;
1630 }
1631 else
1632 stack.pop_back();
1633 break;
1634
1635 //----------------------------------------------------------------------
1636 // OPCODE: DW_OP_over
1637 // OPERANDS: none
1638 // DESCRIPTION: Duplicates the entry currently second in the stack at
1639 // the top of the stack.
1640 //----------------------------------------------------------------------
1641 case DW_OP_over:
1642 if (stack.size() < 2)
1643 {
1644 if (error_ptr)
1645 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_over.");
1646 return false;
1647 }
1648 else
1649 stack.push_back(stack[stack.size() - 2]);
1650 break;
1651
1652
1653 //----------------------------------------------------------------------
1654 // OPCODE: DW_OP_pick
1655 // OPERANDS: uint8_t index into the current stack
1656 // DESCRIPTION: The stack entry with the specified index (0 through 255,
1657 // inclusive) is pushed on the stack
1658 //----------------------------------------------------------------------
1659 case DW_OP_pick:
1660 {
1661 uint8_t pick_idx = opcodes.GetU8(&offset);
1662 if (pick_idx < stack.size())
1663 stack.push_back(stack[pick_idx]);
1664 else
1665 {
1666 if (error_ptr)
1667 error_ptr->SetErrorStringWithFormat("Index %u out of range for DW_OP_pick.\n", pick_idx);
1668 return false;
1669 }
1670 }
1671 break;
1672
1673 //----------------------------------------------------------------------
1674 // OPCODE: DW_OP_swap
1675 // OPERANDS: none
1676 // DESCRIPTION: swaps the top two stack entries. The entry at the top
1677 // of the stack becomes the second stack entry, and the second entry
1678 // becomes the top of the stack
1679 //----------------------------------------------------------------------
1680 case DW_OP_swap:
1681 if (stack.size() < 2)
1682 {
1683 if (error_ptr)
1684 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_swap.");
1685 return false;
1686 }
1687 else
1688 {
1689 tmp = stack.back();
1690 stack.back() = stack[stack.size() - 2];
1691 stack[stack.size() - 2] = tmp;
1692 }
1693 break;
1694
1695 //----------------------------------------------------------------------
1696 // OPCODE: DW_OP_rot
1697 // OPERANDS: none
1698 // DESCRIPTION: Rotates the first three stack entries. The entry at
1699 // the top of the stack becomes the third stack entry, the second
1700 // entry becomes the top of the stack, and the third entry becomes
1701 // the second entry.
1702 //----------------------------------------------------------------------
1703 case DW_OP_rot:
1704 if (stack.size() < 3)
1705 {
1706 if (error_ptr)
1707 error_ptr->SetErrorString("Expression stack needs at least 3 items for DW_OP_rot.");
1708 return false;
1709 }
1710 else
1711 {
1712 size_t last_idx = stack.size() - 1;
1713 Value old_top = stack[last_idx];
1714 stack[last_idx] = stack[last_idx - 1];
1715 stack[last_idx - 1] = stack[last_idx - 2];
1716 stack[last_idx - 2] = old_top;
1717 }
1718 break;
1719
1720 //----------------------------------------------------------------------
1721 // OPCODE: DW_OP_abs
1722 // OPERANDS: none
1723 // DESCRIPTION: pops the top stack entry, interprets it as a signed
1724 // value and pushes its absolute value. If the absolute value can not be
1725 // represented, the result is undefined.
1726 //----------------------------------------------------------------------
1727 case DW_OP_abs:
1728 if (stack.empty())
1729 {
1730 if (error_ptr)
1731 error_ptr->SetErrorString("Expression stack needs at least 1 item for DW_OP_abs.");
1732 return false;
1733 }
1734 else if (stack.back().ResolveValue(exe_ctx, ast_context).AbsoluteValue() == false)
1735 {
1736 if (error_ptr)
1737 error_ptr->SetErrorString("Failed to take the absolute value of the first stack item.");
1738 return false;
1739 }
1740 break;
1741
1742 //----------------------------------------------------------------------
1743 // OPCODE: DW_OP_and
1744 // OPERANDS: none
1745 // DESCRIPTION: pops the top two stack values, performs a bitwise and
1746 // operation on the two, and pushes the result.
1747 //----------------------------------------------------------------------
1748 case DW_OP_and:
1749 if (stack.size() < 2)
1750 {
1751 if (error_ptr)
1752 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_and.");
1753 return false;
1754 }
1755 else
1756 {
1757 tmp = stack.back();
1758 stack.pop_back();
1759 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) & tmp.ResolveValue(exe_ctx, ast_context);
1760 }
1761 break;
1762
1763 //----------------------------------------------------------------------
1764 // OPCODE: DW_OP_div
1765 // OPERANDS: none
1766 // DESCRIPTION: pops the top two stack values, divides the former second
1767 // entry by the former top of the stack using signed division, and
1768 // pushes the result.
1769 //----------------------------------------------------------------------
1770 case DW_OP_div:
1771 if (stack.size() < 2)
1772 {
1773 if (error_ptr)
1774 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_div.");
1775 return false;
1776 }
1777 else
1778 {
1779 tmp = stack.back();
1780 if (tmp.ResolveValue(exe_ctx, ast_context).IsZero())
1781 {
1782 if (error_ptr)
1783 error_ptr->SetErrorString("Divide by zero.");
1784 return false;
1785 }
1786 else
1787 {
1788 stack.pop_back();
1789 stack.back() = stack.back().ResolveValue(exe_ctx, ast_context) / tmp.ResolveValue(exe_ctx, ast_context);
1790 if (!stack.back().ResolveValue(exe_ctx, ast_context).IsValid())
1791 {
1792 if (error_ptr)
1793 error_ptr->SetErrorString("Divide failed.");
1794 return false;
1795 }
1796 }
1797 }
1798 break;
1799
1800 //----------------------------------------------------------------------
1801 // OPCODE: DW_OP_minus
1802 // OPERANDS: none
1803 // DESCRIPTION: pops the top two stack values, subtracts the former top
1804 // of the stack from the former second entry, and pushes the result.
1805 //----------------------------------------------------------------------
1806 case DW_OP_minus:
1807 if (stack.size() < 2)
1808 {
1809 if (error_ptr)
1810 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_minus.");
1811 return false;
1812 }
1813 else
1814 {
1815 tmp = stack.back();
1816 stack.pop_back();
1817 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) - tmp.ResolveValue(exe_ctx, ast_context);
1818 }
1819 break;
1820
1821 //----------------------------------------------------------------------
1822 // OPCODE: DW_OP_mod
1823 // OPERANDS: none
1824 // DESCRIPTION: pops the top two stack values and pushes the result of
1825 // the calculation: former second stack entry modulo the former top of
1826 // the stack.
1827 //----------------------------------------------------------------------
1828 case DW_OP_mod:
1829 if (stack.size() < 2)
1830 {
1831 if (error_ptr)
1832 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_mod.");
1833 return false;
1834 }
1835 else
1836 {
1837 tmp = stack.back();
1838 stack.pop_back();
1839 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) % tmp.ResolveValue(exe_ctx, ast_context);
1840 }
1841 break;
1842
1843
1844 //----------------------------------------------------------------------
1845 // OPCODE: DW_OP_mul
1846 // OPERANDS: none
1847 // DESCRIPTION: pops the top two stack entries, multiplies them
1848 // together, and pushes the result.
1849 //----------------------------------------------------------------------
1850 case DW_OP_mul:
1851 if (stack.size() < 2)
1852 {
1853 if (error_ptr)
1854 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_mul.");
1855 return false;
1856 }
1857 else
1858 {
1859 tmp = stack.back();
1860 stack.pop_back();
1861 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) * tmp.ResolveValue(exe_ctx, ast_context);
1862 }
1863 break;
1864
1865 //----------------------------------------------------------------------
1866 // OPCODE: DW_OP_neg
1867 // OPERANDS: none
1868 // DESCRIPTION: pops the top stack entry, and pushes its negation.
1869 //----------------------------------------------------------------------
1870 case DW_OP_neg:
1871 if (stack.empty())
1872 {
1873 if (error_ptr)
1874 error_ptr->SetErrorString("Expression stack needs at least 1 item for DW_OP_neg.");
1875 return false;
1876 }
1877 else
1878 {
1879 if (stack.back().ResolveValue(exe_ctx, ast_context).UnaryNegate() == false)
1880 {
1881 if (error_ptr)
1882 error_ptr->SetErrorString("Unary negate failed.");
1883 return false;
1884 }
1885 }
1886 break;
1887
1888 //----------------------------------------------------------------------
1889 // OPCODE: DW_OP_not
1890 // OPERANDS: none
1891 // DESCRIPTION: pops the top stack entry, and pushes its bitwise
1892 // complement
1893 //----------------------------------------------------------------------
1894 case DW_OP_not:
1895 if (stack.empty())
1896 {
1897 if (error_ptr)
1898 error_ptr->SetErrorString("Expression stack needs at least 1 item for DW_OP_not.");
1899 return false;
1900 }
1901 else
1902 {
1903 if (stack.back().ResolveValue(exe_ctx, ast_context).OnesComplement() == false)
1904 {
1905 if (error_ptr)
1906 error_ptr->SetErrorString("Logical NOT failed.");
1907 return false;
1908 }
1909 }
1910 break;
1911
1912 //----------------------------------------------------------------------
1913 // OPCODE: DW_OP_or
1914 // OPERANDS: none
1915 // DESCRIPTION: pops the top two stack entries, performs a bitwise or
1916 // operation on the two, and pushes the result.
1917 //----------------------------------------------------------------------
1918 case DW_OP_or:
1919 if (stack.size() < 2)
1920 {
1921 if (error_ptr)
1922 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_or.");
1923 return false;
1924 }
1925 else
1926 {
1927 tmp = stack.back();
1928 stack.pop_back();
1929 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) | tmp.ResolveValue(exe_ctx, ast_context);
1930 }
1931 break;
1932
1933 //----------------------------------------------------------------------
1934 // OPCODE: DW_OP_plus
1935 // OPERANDS: none
1936 // DESCRIPTION: pops the top two stack entries, adds them together, and
1937 // pushes the result.
1938 //----------------------------------------------------------------------
1939 case DW_OP_plus:
1940 if (stack.size() < 2)
1941 {
1942 if (error_ptr)
1943 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_plus.");
1944 return false;
1945 }
1946 else
1947 {
1948 tmp = stack.back();
1949 stack.pop_back();
1950 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) + tmp.ResolveValue(exe_ctx, ast_context);
1951 }
1952 break;
1953
1954 //----------------------------------------------------------------------
1955 // OPCODE: DW_OP_plus_uconst
1956 // OPERANDS: none
1957 // DESCRIPTION: pops the top stack entry, adds it to the unsigned LEB128
1958 // constant operand and pushes the result.
1959 //----------------------------------------------------------------------
1960 case DW_OP_plus_uconst:
1961 if (stack.empty())
1962 {
1963 if (error_ptr)
1964 error_ptr->SetErrorString("Expression stack needs at least 1 item for DW_OP_plus_uconst.");
1965 return false;
1966 }
1967 else
1968 {
1969 uint32_t uconst_value = opcodes.GetULEB128(&offset);
1970 // Implicit conversion from a UINT to a Scalar...
1971 stack.back().ResolveValue(exe_ctx, ast_context) += uconst_value;
1972 if (!stack.back().ResolveValue(exe_ctx, ast_context).IsValid())
1973 {
1974 if (error_ptr)
1975 error_ptr->SetErrorString("DW_OP_plus_uconst failed.");
1976 return false;
1977 }
1978 }
1979 break;
1980
1981 //----------------------------------------------------------------------
1982 // OPCODE: DW_OP_shl
1983 // OPERANDS: none
1984 // DESCRIPTION: pops the top two stack entries, shifts the former
1985 // second entry left by the number of bits specified by the former top
1986 // of the stack, and pushes the result.
1987 //----------------------------------------------------------------------
1988 case DW_OP_shl:
1989 if (stack.size() < 2)
1990 {
1991 if (error_ptr)
1992 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_shl.");
1993 return false;
1994 }
1995 else
1996 {
1997 tmp = stack.back();
1998 stack.pop_back();
1999 stack.back().ResolveValue(exe_ctx, ast_context) <<= tmp.ResolveValue(exe_ctx, ast_context);
2000 }
2001 break;
2002
2003 //----------------------------------------------------------------------
2004 // OPCODE: DW_OP_shr
2005 // OPERANDS: none
2006 // DESCRIPTION: pops the top two stack entries, shifts the former second
2007 // entry right logically (filling with zero bits) by the number of bits
2008 // specified by the former top of the stack, and pushes the result.
2009 //----------------------------------------------------------------------
2010 case DW_OP_shr:
2011 if (stack.size() < 2)
2012 {
2013 if (error_ptr)
2014 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_shr.");
2015 return false;
2016 }
2017 else
2018 {
2019 tmp = stack.back();
2020 stack.pop_back();
2021 if (stack.back().ResolveValue(exe_ctx, ast_context).ShiftRightLogical(tmp.ResolveValue(exe_ctx, ast_context)) == false)
2022 {
2023 if (error_ptr)
2024 error_ptr->SetErrorString("DW_OP_shr failed.");
2025 return false;
2026 }
2027 }
2028 break;
2029
2030 //----------------------------------------------------------------------
2031 // OPCODE: DW_OP_shra
2032 // OPERANDS: none
2033 // DESCRIPTION: pops the top two stack entries, shifts the former second
2034 // entry right arithmetically (divide the magnitude by 2, keep the same
2035 // sign for the result) by the number of bits specified by the former
2036 // top of the stack, and pushes the result.
2037 //----------------------------------------------------------------------
2038 case DW_OP_shra:
2039 if (stack.size() < 2)
2040 {
2041 if (error_ptr)
2042 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_shra.");
2043 return false;
2044 }
2045 else
2046 {
2047 tmp = stack.back();
2048 stack.pop_back();
2049 stack.back().ResolveValue(exe_ctx, ast_context) >>= tmp.ResolveValue(exe_ctx, ast_context);
2050 }
2051 break;
2052
2053 //----------------------------------------------------------------------
2054 // OPCODE: DW_OP_xor
2055 // OPERANDS: none
2056 // DESCRIPTION: pops the top two stack entries, performs the bitwise
2057 // exclusive-or operation on the two, and pushes the result.
2058 //----------------------------------------------------------------------
2059 case DW_OP_xor:
2060 if (stack.size() < 2)
2061 {
2062 if (error_ptr)
2063 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_xor.");
2064 return false;
2065 }
2066 else
2067 {
2068 tmp = stack.back();
2069 stack.pop_back();
2070 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) ^ tmp.ResolveValue(exe_ctx, ast_context);
2071 }
2072 break;
2073
2074
2075 //----------------------------------------------------------------------
2076 // OPCODE: DW_OP_skip
2077 // OPERANDS: int16_t
2078 // DESCRIPTION: An unconditional branch. Its single operand is a 2-byte
2079 // signed integer constant. The 2-byte constant is the number of bytes
2080 // of the DWARF expression to skip forward or backward from the current
2081 // operation, beginning after the 2-byte constant.
2082 //----------------------------------------------------------------------
2083 case DW_OP_skip:
2084 {
2085 int16_t skip_offset = (int16_t)opcodes.GetU16(&offset);
2086 uint32_t new_offset = offset + skip_offset;
2087 if (new_offset >= opcodes_offset && new_offset < end_offset)
2088 offset = new_offset;
2089 else
2090 {
2091 if (error_ptr)
2092 error_ptr->SetErrorString("Invalid opcode offset in DW_OP_skip.");
2093 return false;
2094 }
2095 }
2096 break;
2097
2098 //----------------------------------------------------------------------
2099 // OPCODE: DW_OP_bra
2100 // OPERANDS: int16_t
2101 // DESCRIPTION: A conditional branch. Its single operand is a 2-byte
2102 // signed integer constant. This operation pops the top of stack. If
2103 // the value popped is not the constant 0, the 2-byte constant operand
2104 // is the number of bytes of the DWARF expression to skip forward or
2105 // backward from the current operation, beginning after the 2-byte
2106 // constant.
2107 //----------------------------------------------------------------------
2108 case DW_OP_bra:
2109 {
2110 tmp = stack.back();
2111 stack.pop_back();
2112 int16_t bra_offset = (int16_t)opcodes.GetU16(&offset);
2113 Scalar zero(0);
2114 if (tmp.ResolveValue(exe_ctx, ast_context) != zero)
2115 {
2116 uint32_t new_offset = offset + bra_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_bra.");
2123 return false;
2124 }
2125 }
2126 }
2127 break;
2128
2129 //----------------------------------------------------------------------
2130 // OPCODE: DW_OP_eq
2131 // OPERANDS: none
2132 // DESCRIPTION: pops the top two stack values, compares using the
2133 // equals (==) operator.
2134 // STACK RESULT: push the constant value 1 onto the stack if the result
2135 // of the operation is true or the constant value 0 if the result of the
2136 // operation is false.
2137 //----------------------------------------------------------------------
2138 case DW_OP_eq:
2139 if (stack.size() < 2)
2140 {
2141 if (error_ptr)
2142 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_eq.");
2143 return false;
2144 }
2145 else
2146 {
2147 tmp = stack.back();
2148 stack.pop_back();
2149 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) == tmp.ResolveValue(exe_ctx, ast_context);
2150 }
2151 break;
2152
2153 //----------------------------------------------------------------------
2154 // OPCODE: DW_OP_ge
2155 // OPERANDS: none
2156 // DESCRIPTION: pops the top two stack values, compares using the
2157 // greater than or equal to (>=) operator.
2158 // STACK RESULT: push the constant value 1 onto the stack if the result
2159 // of the operation is true or the constant value 0 if the result of the
2160 // operation is false.
2161 //----------------------------------------------------------------------
2162 case DW_OP_ge:
2163 if (stack.size() < 2)
2164 {
2165 if (error_ptr)
2166 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_ge.");
2167 return false;
2168 }
2169 else
2170 {
2171 tmp = stack.back();
2172 stack.pop_back();
2173 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) >= tmp.ResolveValue(exe_ctx, ast_context);
2174 }
2175 break;
2176
2177 //----------------------------------------------------------------------
2178 // OPCODE: DW_OP_gt
2179 // OPERANDS: none
2180 // DESCRIPTION: pops the top two stack values, compares using the
2181 // greater than (>) operator.
2182 // STACK RESULT: push the constant value 1 onto the stack if the result
2183 // of the operation is true or the constant value 0 if the result of the
2184 // operation is false.
2185 //----------------------------------------------------------------------
2186 case DW_OP_gt:
2187 if (stack.size() < 2)
2188 {
2189 if (error_ptr)
2190 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_gt.");
2191 return false;
2192 }
2193 else
2194 {
2195 tmp = stack.back();
2196 stack.pop_back();
2197 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) > tmp.ResolveValue(exe_ctx, ast_context);
2198 }
2199 break;
2200
2201 //----------------------------------------------------------------------
2202 // OPCODE: DW_OP_le
2203 // OPERANDS: none
2204 // DESCRIPTION: pops the top two stack values, compares using the
2205 // less than or equal to (<=) operator.
2206 // STACK RESULT: push the constant value 1 onto the stack if the result
2207 // of the operation is true or the constant value 0 if the result of the
2208 // operation is false.
2209 //----------------------------------------------------------------------
2210 case DW_OP_le:
2211 if (stack.size() < 2)
2212 {
2213 if (error_ptr)
2214 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_le.");
2215 return false;
2216 }
2217 else
2218 {
2219 tmp = stack.back();
2220 stack.pop_back();
2221 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) <= tmp.ResolveValue(exe_ctx, ast_context);
2222 }
2223 break;
2224
2225 //----------------------------------------------------------------------
2226 // OPCODE: DW_OP_lt
2227 // OPERANDS: none
2228 // DESCRIPTION: pops the top two stack values, compares using the
2229 // less than (<) operator.
2230 // STACK RESULT: push the constant value 1 onto the stack if the result
2231 // of the operation is true or the constant value 0 if the result of the
2232 // operation is false.
2233 //----------------------------------------------------------------------
2234 case DW_OP_lt:
2235 if (stack.size() < 2)
2236 {
2237 if (error_ptr)
2238 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_lt.");
2239 return false;
2240 }
2241 else
2242 {
2243 tmp = stack.back();
2244 stack.pop_back();
2245 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) < tmp.ResolveValue(exe_ctx, ast_context);
2246 }
2247 break;
2248
2249 //----------------------------------------------------------------------
2250 // OPCODE: DW_OP_ne
2251 // OPERANDS: none
2252 // DESCRIPTION: pops the top two stack values, compares using the
2253 // not equal (!=) operator.
2254 // STACK RESULT: push the constant value 1 onto the stack if the result
2255 // of the operation is true or the constant value 0 if the result of the
2256 // operation is false.
2257 //----------------------------------------------------------------------
2258 case DW_OP_ne:
2259 if (stack.size() < 2)
2260 {
2261 if (error_ptr)
2262 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_ne.");
2263 return false;
2264 }
2265 else
2266 {
2267 tmp = stack.back();
2268 stack.pop_back();
2269 stack.back().ResolveValue(exe_ctx, ast_context) = stack.back().ResolveValue(exe_ctx, ast_context) != tmp.ResolveValue(exe_ctx, ast_context);
2270 }
2271 break;
2272
2273 //----------------------------------------------------------------------
2274 // OPCODE: DW_OP_litn
2275 // OPERANDS: none
2276 // DESCRIPTION: encode the unsigned literal values from 0 through 31.
2277 // STACK RESULT: push the unsigned literal constant value onto the top
2278 // of the stack.
2279 //----------------------------------------------------------------------
2280 case DW_OP_lit0:
2281 case DW_OP_lit1:
2282 case DW_OP_lit2:
2283 case DW_OP_lit3:
2284 case DW_OP_lit4:
2285 case DW_OP_lit5:
2286 case DW_OP_lit6:
2287 case DW_OP_lit7:
2288 case DW_OP_lit8:
2289 case DW_OP_lit9:
2290 case DW_OP_lit10:
2291 case DW_OP_lit11:
2292 case DW_OP_lit12:
2293 case DW_OP_lit13:
2294 case DW_OP_lit14:
2295 case DW_OP_lit15:
2296 case DW_OP_lit16:
2297 case DW_OP_lit17:
2298 case DW_OP_lit18:
2299 case DW_OP_lit19:
2300 case DW_OP_lit20:
2301 case DW_OP_lit21:
2302 case DW_OP_lit22:
2303 case DW_OP_lit23:
2304 case DW_OP_lit24:
2305 case DW_OP_lit25:
2306 case DW_OP_lit26:
2307 case DW_OP_lit27:
2308 case DW_OP_lit28:
2309 case DW_OP_lit29:
2310 case DW_OP_lit30:
2311 case DW_OP_lit31:
Greg Clayton801417e2011-07-07 01:59:51 +0000[diff] [blame]2312 stack.push_back(Scalar(op - DW_OP_lit0));
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2313 break;
2314
2315 //----------------------------------------------------------------------
2316 // OPCODE: DW_OP_regN
2317 // OPERANDS: none
2318 // DESCRIPTION: Push the value in register n on the top of the stack.
2319 //----------------------------------------------------------------------
2320 case DW_OP_reg0:
2321 case DW_OP_reg1:
2322 case DW_OP_reg2:
2323 case DW_OP_reg3:
2324 case DW_OP_reg4:
2325 case DW_OP_reg5:
2326 case DW_OP_reg6:
2327 case DW_OP_reg7:
2328 case DW_OP_reg8:
2329 case DW_OP_reg9:
2330 case DW_OP_reg10:
2331 case DW_OP_reg11:
2332 case DW_OP_reg12:
2333 case DW_OP_reg13:
2334 case DW_OP_reg14:
2335 case DW_OP_reg15:
2336 case DW_OP_reg16:
2337 case DW_OP_reg17:
2338 case DW_OP_reg18:
2339 case DW_OP_reg19:
2340 case DW_OP_reg20:
2341 case DW_OP_reg21:
2342 case DW_OP_reg22:
2343 case DW_OP_reg23:
2344 case DW_OP_reg24:
2345 case DW_OP_reg25:
2346 case DW_OP_reg26:
2347 case DW_OP_reg27:
2348 case DW_OP_reg28:
2349 case DW_OP_reg29:
2350 case DW_OP_reg30:
2351 case DW_OP_reg31:
2352 {
2353 reg_num = op - DW_OP_reg0;
2354
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]2355 if (ReadRegisterValueAsScalar (reg_ctx, reg_kind, reg_num, error_ptr, tmp))
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2356 stack.push_back(tmp);
2357 else
2358 return false;
2359 }
2360 break;
2361 //----------------------------------------------------------------------
2362 // OPCODE: DW_OP_regx
2363 // OPERANDS:
2364 // ULEB128 literal operand that encodes the register.
2365 // DESCRIPTION: Push the value in register on the top of the stack.
2366 //----------------------------------------------------------------------
2367 case DW_OP_regx:
2368 {
2369 reg_num = opcodes.GetULEB128(&offset);
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]2370 if (ReadRegisterValueAsScalar (reg_ctx, reg_kind, reg_num, error_ptr, tmp))
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2371 stack.push_back(tmp);
2372 else
2373 return false;
2374 }
2375 break;
2376
2377 //----------------------------------------------------------------------
2378 // OPCODE: DW_OP_bregN
2379 // OPERANDS:
2380 // SLEB128 offset from register N
2381 // DESCRIPTION: Value is in memory at the address specified by register
2382 // N plus an offset.
2383 //----------------------------------------------------------------------
2384 case DW_OP_breg0:
2385 case DW_OP_breg1:
2386 case DW_OP_breg2:
2387 case DW_OP_breg3:
2388 case DW_OP_breg4:
2389 case DW_OP_breg5:
2390 case DW_OP_breg6:
2391 case DW_OP_breg7:
2392 case DW_OP_breg8:
2393 case DW_OP_breg9:
2394 case DW_OP_breg10:
2395 case DW_OP_breg11:
2396 case DW_OP_breg12:
2397 case DW_OP_breg13:
2398 case DW_OP_breg14:
2399 case DW_OP_breg15:
2400 case DW_OP_breg16:
2401 case DW_OP_breg17:
2402 case DW_OP_breg18:
2403 case DW_OP_breg19:
2404 case DW_OP_breg20:
2405 case DW_OP_breg21:
2406 case DW_OP_breg22:
2407 case DW_OP_breg23:
2408 case DW_OP_breg24:
2409 case DW_OP_breg25:
2410 case DW_OP_breg26:
2411 case DW_OP_breg27:
2412 case DW_OP_breg28:
2413 case DW_OP_breg29:
2414 case DW_OP_breg30:
2415 case DW_OP_breg31:
2416 {
2417 reg_num = op - DW_OP_breg0;
2418
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]2419 if (ReadRegisterValueAsScalar (reg_ctx, reg_kind, reg_num, error_ptr, tmp))
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2420 {
2421 int64_t breg_offset = opcodes.GetSLEB128(&offset);
2422 tmp.ResolveValue(exe_ctx, ast_context) += (uint64_t)breg_offset;
2423 stack.push_back(tmp);
2424 stack.back().SetValueType (Value::eValueTypeLoadAddress);
2425 }
2426 else
2427 return false;
2428 }
2429 break;
2430 //----------------------------------------------------------------------
2431 // OPCODE: DW_OP_bregx
2432 // OPERANDS: 2
2433 // ULEB128 literal operand that encodes the register.
2434 // SLEB128 offset from register N
2435 // DESCRIPTION: Value is in memory at the address specified by register
2436 // N plus an offset.
2437 //----------------------------------------------------------------------
2438 case DW_OP_bregx:
2439 {
2440 reg_num = opcodes.GetULEB128(&offset);
2441
Jason Molenda8e69de42010-11-20 01:28:30 +0000[diff] [blame]2442 if (ReadRegisterValueAsScalar (reg_ctx, reg_kind, reg_num, error_ptr, tmp))
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2443 {
2444 int64_t breg_offset = opcodes.GetSLEB128(&offset);
2445 tmp.ResolveValue(exe_ctx, ast_context) += (uint64_t)breg_offset;
2446 stack.push_back(tmp);
2447 stack.back().SetValueType (Value::eValueTypeLoadAddress);
2448 }
2449 else
2450 return false;
2451 }
2452 break;
2453
2454 case DW_OP_fbreg:
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2455 if (exe_ctx)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2456 {
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2457 if (frame)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2458 {
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2459 Scalar value;
2460 if (frame->GetFrameBaseValue(value, error_ptr))
2461 {
2462 int64_t fbreg_offset = opcodes.GetSLEB128(&offset);
2463 value += fbreg_offset;
2464 stack.push_back(value);
2465 stack.back().SetValueType (Value::eValueTypeLoadAddress);
2466 }
2467 else
2468 return false;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2469 }
2470 else
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2471 {
2472 if (error_ptr)
2473 error_ptr->SetErrorString ("Invalid stack frame in context for DW_OP_fbreg opcode.");
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2474 return false;
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2475 }
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2476 }
2477 else
2478 {
2479 if (error_ptr)
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2480 error_ptr->SetErrorStringWithFormat ("NULL execution context for DW_OP_fbreg.\n");
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2481 return false;
2482 }
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2483
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2484 break;
2485
2486 //----------------------------------------------------------------------
2487 // OPCODE: DW_OP_nop
2488 // OPERANDS: none
2489 // DESCRIPTION: A place holder. It has no effect on the location stack
2490 // or any of its values.
2491 //----------------------------------------------------------------------
2492 case DW_OP_nop:
2493 break;
2494
2495 //----------------------------------------------------------------------
2496 // OPCODE: DW_OP_piece
2497 // OPERANDS: 1
2498 // ULEB128: byte size of the piece
2499 // DESCRIPTION: The operand describes the size in bytes of the piece of
2500 // the object referenced by the DWARF expression whose result is at the
2501 // top of the stack. If the piece is located in a register, but does not
2502 // occupy the entire register, the placement of the piece within that
2503 // register is defined by the ABI.
2504 //
2505 // Many compilers store a single variable in sets of registers, or store
2506 // a variable partially in memory and partially in registers.
2507 // DW_OP_piece provides a way of describing how large a part of a
2508 // variable a particular DWARF expression refers to.
2509 //----------------------------------------------------------------------
2510 case DW_OP_piece:
2511 if (error_ptr)
2512 error_ptr->SetErrorString ("Unimplemented opcode DW_OP_piece.");
2513 return false;
2514
2515 //----------------------------------------------------------------------
2516 // OPCODE: DW_OP_push_object_address
2517 // OPERANDS: none
2518 // DESCRIPTION: Pushes the address of the object currently being
2519 // evaluated as part of evaluation of a user presented expression.
2520 // This object may correspond to an independent variable described by
2521 // its own DIE or it may be a component of an array, structure, or class
2522 // whose address has been dynamically determined by an earlier step
2523 // during user expression evaluation.
2524 //----------------------------------------------------------------------
2525 case DW_OP_push_object_address:
2526 if (error_ptr)
2527 error_ptr->SetErrorString ("Unimplemented opcode DW_OP_push_object_address.");
2528 return false;
2529
2530 //----------------------------------------------------------------------
2531 // OPCODE: DW_OP_call2
2532 // OPERANDS:
2533 // uint16_t compile unit relative offset of a DIE
2534 // DESCRIPTION: Performs subroutine calls during evaluation
2535 // of a DWARF expression. The operand is the 2-byte unsigned offset
2536 // of a debugging information entry in the current compilation unit.
2537 //
2538 // Operand interpretation is exactly like that for DW_FORM_ref2.
2539 //
2540 // This operation transfers control of DWARF expression evaluation
2541 // to the DW_AT_location attribute of the referenced DIE. If there is
2542 // no such attribute, then there is no effect. Execution of the DWARF
2543 // expression of a DW_AT_location attribute may add to and/or remove from
2544 // values on the stack. Execution returns to the point following the call
2545 // when the end of the attribute is reached. Values on the stack at the
2546 // time of the call may be used as parameters by the called expression
2547 // and values left on the stack by the called expression may be used as
2548 // return values by prior agreement between the calling and called
2549 // expressions.
2550 //----------------------------------------------------------------------
2551 case DW_OP_call2:
2552 if (error_ptr)
2553 error_ptr->SetErrorString ("Unimplemented opcode DW_OP_call2.");
2554 return false;
2555 //----------------------------------------------------------------------
2556 // OPCODE: DW_OP_call4
2557 // OPERANDS: 1
2558 // uint32_t compile unit relative offset of a DIE
2559 // DESCRIPTION: Performs a subroutine call during evaluation of a DWARF
2560 // expression. For DW_OP_call4, the operand is a 4-byte unsigned offset
2561 // of a debugging information entry in the current compilation unit.
2562 //
2563 // Operand interpretation DW_OP_call4 is exactly like that for
2564 // DW_FORM_ref4.
2565 //
2566 // This operation transfers control of DWARF expression evaluation
2567 // to the DW_AT_location attribute of the referenced DIE. If there is
2568 // no such attribute, then there is no effect. Execution of the DWARF
2569 // expression of a DW_AT_location attribute may add to and/or remove from
2570 // values on the stack. Execution returns to the point following the call
2571 // when the end of the attribute is reached. Values on the stack at the
2572 // time of the call may be used as parameters by the called expression
2573 // and values left on the stack by the called expression may be used as
2574 // return values by prior agreement between the calling and called
2575 // expressions.
2576 //----------------------------------------------------------------------
2577 case DW_OP_call4:
2578 if (error_ptr)
2579 error_ptr->SetErrorString ("Unimplemented opcode DW_OP_call4.");
2580 return false;
2581
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]2582#if 0
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2583 //----------------------------------------------------------------------
2584 // OPCODE: DW_OP_call_ref
2585 // OPERANDS:
2586 // uint32_t absolute DIE offset for 32-bit DWARF or a uint64_t
2587 // absolute DIE offset for 64 bit DWARF.
2588 // DESCRIPTION: Performs a subroutine call during evaluation of a DWARF
2589 // expression. Takes a single operand. In the 32-bit DWARF format, the
2590 // operand is a 4-byte unsigned value; in the 64-bit DWARF format, it
2591 // is an 8-byte unsigned value. The operand is used as the offset of a
2592 // debugging information entry in a .debug_info section which may be
2593 // contained in a shared object for executable other than that
2594 // containing the operator. For references from one shared object or
2595 // executable to another, the relocation must be performed by the
2596 // consumer.
2597 //
2598 // Operand interpretation of DW_OP_call_ref is exactly like that for
2599 // DW_FORM_ref_addr.
2600 //
2601 // This operation transfers control of DWARF expression evaluation
2602 // to the DW_AT_location attribute of the referenced DIE. If there is
2603 // no such attribute, then there is no effect. Execution of the DWARF
2604 // expression of a DW_AT_location attribute may add to and/or remove from
2605 // values on the stack. Execution returns to the point following the call
2606 // when the end of the attribute is reached. Values on the stack at the
2607 // time of the call may be used as parameters by the called expression
2608 // and values left on the stack by the called expression may be used as
2609 // return values by prior agreement between the calling and called
2610 // expressions.
2611 //----------------------------------------------------------------------
2612 case DW_OP_call_ref:
2613 if (error_ptr)
2614 error_ptr->SetErrorString ("Unimplemented opcode DW_OP_call_ref.");
2615 return false;
2616
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]2617 //----------------------------------------------------------------------
2618 // OPCODE: DW_OP_APPLE_array_ref
2619 // OPERANDS: none
2620 // DESCRIPTION: Pops a value off the stack and uses it as the array
2621 // index. Pops a second value off the stack and uses it as the array
2622 // itself. Pushes a value onto the stack representing the element of
2623 // the array specified by the index.
2624 //----------------------------------------------------------------------
2625 case DW_OP_APPLE_array_ref:
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2626 {
2627 if (stack.size() < 2)
2628 {
2629 if (error_ptr)
2630 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_APPLE_array_ref.");
2631 return false;
2632 }
2633
2634 Value index_val = stack.back();
2635 stack.pop_back();
2636 Value array_val = stack.back();
2637 stack.pop_back();
2638
2639 Scalar &index_scalar = index_val.ResolveValue(exe_ctx, ast_context);
Greg Clayton381f9682011-04-01 18:14:08 +0000[diff] [blame]2640 int64_t index = index_scalar.SLongLong(LLONG_MAX);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2641
Greg Clayton381f9682011-04-01 18:14:08 +0000[diff] [blame]2642 if (index == LLONG_MAX)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2643 {
2644 if (error_ptr)
2645 error_ptr->SetErrorString("Invalid array index.");
2646 return false;
2647 }
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]2648
Greg Clayton6916e352010-11-13 03:52:47 +0000[diff] [blame]2649 if (array_val.GetContextType() != Value::eContextTypeClangType)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2650 {
2651 if (error_ptr)
2652 error_ptr->SetErrorString("Arrays without Clang types are unhandled at this time.");
2653 return false;
2654 }
2655
2656 if (array_val.GetValueType() != Value::eValueTypeLoadAddress &&
2657 array_val.GetValueType() != Value::eValueTypeHostAddress)
2658 {
2659 if (error_ptr)
2660 error_ptr->SetErrorString("Array must be stored in memory.");
2661 return false;
2662 }
2663
Greg Clayton462d4142010-09-29 01:12:09 +0000[diff] [blame]2664 void *array_type = array_val.GetClangType();
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2665
2666 void *member_type;
2667 uint64_t size = 0;
2668
2669 if ((!ClangASTContext::IsPointerType(array_type, &member_type)) &&
2670 (!ClangASTContext::IsArrayType(array_type, &member_type, &size)))
2671 {
2672 if (error_ptr)
2673 error_ptr->SetErrorString("Array reference from something that is neither a pointer nor an array.");
2674 return false;
2675 }
2676
2677 if (size && (index >= size || index < 0))
2678 {
2679 if (error_ptr)
2680 error_ptr->SetErrorStringWithFormat("Out of bounds array access. %lld is not in [0, %llu]", index, size);
2681 return false;
2682 }
2683
Greg Clayton960d6a42010-08-03 00:35:52 +0000[diff] [blame]2684 uint64_t member_bit_size = ClangASTType::GetClangTypeBitWidth(ast_context, member_type);
2685 uint64_t member_bit_align = ClangASTType::GetTypeBitAlign(ast_context, member_type);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2686 uint64_t member_bit_incr = ((member_bit_size + member_bit_align - 1) / member_bit_align) * member_bit_align;
2687 if (member_bit_incr % 8)
2688 {
2689 if (error_ptr)
Jason Molenda95b7b432011-09-20 00:26:08 +0000[diff] [blame]2690 error_ptr->SetErrorStringWithFormat("Array increment is not byte aligned");
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2691 return false;
2692 }
2693 int64_t member_offset = (int64_t)(member_bit_incr / 8) * index;
2694
2695 Value member;
2696
Greg Clayton6916e352010-11-13 03:52:47 +0000[diff] [blame]2697 member.SetContext(Value::eContextTypeClangType, member_type);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2698 member.SetValueType(array_val.GetValueType());
2699
2700 addr_t array_base = (addr_t)array_val.GetScalar().ULongLong(LLDB_INVALID_ADDRESS);
2701 addr_t member_loc = array_base + member_offset;
2702 member.GetScalar() = (uint64_t)member_loc;
2703
2704 stack.push_back(member);
2705 }
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]2706 break;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2707
2708 //----------------------------------------------------------------------
2709 // OPCODE: DW_OP_APPLE_uninit
2710 // OPERANDS: none
2711 // DESCRIPTION: Lets us know that the value is currently not initialized
2712 //----------------------------------------------------------------------
2713 case DW_OP_APPLE_uninit:
2714 //return eResultTypeErrorUninitialized;
2715 break; // Ignore this as we have seen cases where this value is incorrectly added
2716
2717 //----------------------------------------------------------------------
2718 // OPCODE: DW_OP_APPLE_assign
2719 // OPERANDS: none
2720 // DESCRIPTION: Pops a value off of the stack and assigns it to the next
2721 // item on the stack which must be something assignable (inferior
2722 // Variable, inferior Type with address, inferior register, or
2723 // expression local variable.
2724 //----------------------------------------------------------------------
2725 case DW_OP_APPLE_assign:
2726 if (stack.size() < 2)
2727 {
2728 if (error_ptr)
2729 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_APPLE_assign.");
2730 return false;
2731 }
2732 else
2733 {
2734 tmp = stack.back();
2735 stack.pop_back();
2736 Value::ContextType context_type = stack.back().GetContextType();
Greg Claytoncd548032011-02-01 01:31:41 +0000[diff] [blame]2737 StreamString new_value(Stream::eBinary, 4, lldb::endian::InlHostByteOrder());
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2738 switch (context_type)
2739 {
Greg Clayton6916e352010-11-13 03:52:47 +0000[diff] [blame]2740 case Value::eContextTypeClangType:
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2741 {
Greg Clayton462d4142010-09-29 01:12:09 +0000[diff] [blame]2742 void *clang_type = stack.back().GetClangType();
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2743
2744 if (ClangASTContext::IsAggregateType (clang_type))
2745 {
2746 Value::ValueType source_value_type = tmp.GetValueType();
2747 Value::ValueType target_value_type = stack.back().GetValueType();
2748
2749 addr_t source_addr = (addr_t)tmp.GetScalar().ULongLong();
2750 addr_t target_addr = (addr_t)stack.back().GetScalar().ULongLong();
2751
Greg Clayton960d6a42010-08-03 00:35:52 +0000[diff] [blame]2752 size_t byte_size = (ClangASTType::GetClangTypeBitWidth(ast_context, clang_type) + 7) / 8;
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2753
2754 switch (source_value_type)
2755 {
Greg Clayton4fdf7602011-03-20 04:57:14 +0000[diff] [blame]2756 case Value::eValueTypeScalar:
2757 case Value::eValueTypeFileAddress:
2758 break;
2759
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2760 case Value::eValueTypeLoadAddress:
2761 switch (target_value_type)
2762 {
2763 case Value::eValueTypeLoadAddress:
2764 {
2765 DataBufferHeap data;
2766 data.SetByteSize(byte_size);
2767
2768 Error error;
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2769 if (process->ReadMemory (source_addr, data.GetBytes(), byte_size, error) != byte_size)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2770 {
2771 if (error_ptr)
2772 error_ptr->SetErrorStringWithFormat ("Couldn't read a composite type from the target: %s", error.AsCString());
2773 return false;
2774 }
2775
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2776 if (process->WriteMemory (target_addr, data.GetBytes(), byte_size, error) != byte_size)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2777 {
2778 if (error_ptr)
2779 error_ptr->SetErrorStringWithFormat ("Couldn't write a composite type to the target: %s", error.AsCString());
2780 return false;
2781 }
2782 }
2783 break;
2784 case Value::eValueTypeHostAddress:
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2785 if (process->GetByteOrder() != lldb::endian::InlHostByteOrder())
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2786 {
2787 if (error_ptr)
2788 error_ptr->SetErrorStringWithFormat ("Copy of composite types between incompatible byte orders is unimplemented");
2789 return false;
2790 }
2791 else
2792 {
2793 Error error;
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2794 if (process->ReadMemory (source_addr, (uint8_t*)target_addr, byte_size, error) != byte_size)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2795 {
2796 if (error_ptr)
2797 error_ptr->SetErrorStringWithFormat ("Couldn't read a composite type from the target: %s", error.AsCString());
2798 return false;
2799 }
2800 }
2801 break;
2802 default:
2803 return false;
2804 }
2805 break;
2806 case Value::eValueTypeHostAddress:
2807 switch (target_value_type)
2808 {
2809 case Value::eValueTypeLoadAddress:
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2810 if (process->GetByteOrder() != lldb::endian::InlHostByteOrder())
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2811 {
2812 if (error_ptr)
2813 error_ptr->SetErrorStringWithFormat ("Copy of composite types between incompatible byte orders is unimplemented");
2814 return false;
2815 }
2816 else
2817 {
2818 Error error;
Greg Clayton567e7f32011-09-22 04:58:26 +0000[diff] [blame]2819 if (process->WriteMemory (target_addr, (uint8_t*)source_addr, byte_size, error) != byte_size)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2820 {
2821 if (error_ptr)
2822 error_ptr->SetErrorStringWithFormat ("Couldn't write a composite type to the target: %s", error.AsCString());
2823 return false;
2824 }
2825 }
2826 case Value::eValueTypeHostAddress:
2827 memcpy ((uint8_t*)target_addr, (uint8_t*)source_addr, byte_size);
2828 break;
2829 default:
2830 return false;
2831 }
2832 }
2833 }
2834 else
2835 {
Greg Clayton1674b122010-07-21 22:12:05 +0000[diff] [blame]2836 if (!ClangASTType::SetValueFromScalar (ast_context,
2837 clang_type,
2838 tmp.ResolveValue(exe_ctx, ast_context),
2839 new_value))
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2840 {
2841 if (error_ptr)
2842 error_ptr->SetErrorStringWithFormat ("Couldn't extract a value from an integral type.\n");
2843 return false;
2844 }
2845
2846 Value::ValueType value_type = stack.back().GetValueType();
2847
2848 switch (value_type)
2849 {
2850 case Value::eValueTypeLoadAddress:
2851 case Value::eValueTypeHostAddress:
2852 {
Greg Claytonb3448432011-03-24 21:19:54 +0000[diff] [blame]2853 AddressType address_type = (value_type == Value::eValueTypeLoadAddress ? eAddressTypeLoad : eAddressTypeHost);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2854 lldb::addr_t addr = stack.back().GetScalar().ULongLong(LLDB_INVALID_ADDRESS);
Greg Clayton1674b122010-07-21 22:12:05 +0000[diff] [blame]2855 if (!ClangASTType::WriteToMemory (ast_context,
2856 clang_type,
2857 exe_ctx,
2858 addr,
2859 address_type,
2860 new_value))
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2861 {
2862 if (error_ptr)
2863 error_ptr->SetErrorStringWithFormat ("Failed to write value to memory at 0x%llx.\n", addr);
2864 return false;
2865 }
2866 }
2867 break;
2868
2869 default:
2870 break;
2871 }
2872 }
2873 }
2874 break;
2875
2876 default:
2877 if (error_ptr)
2878 error_ptr->SetErrorString ("Assign failed.");
2879 return false;
2880 }
2881 }
2882 break;
2883
2884 //----------------------------------------------------------------------
2885 // OPCODE: DW_OP_APPLE_address_of
2886 // OPERANDS: none
2887 // DESCRIPTION: Pops a value off of the stack and pushed its address.
2888 // The top item on the stack must be a variable, or already be a memory
2889 // location.
2890 //----------------------------------------------------------------------
2891 case DW_OP_APPLE_address_of:
2892 if (stack.empty())
2893 {
2894 if (error_ptr)
2895 error_ptr->SetErrorString("Expression stack needs at least 1 item for DW_OP_APPLE_address_of.");
2896 return false;
2897 }
2898 else
2899 {
2900 Value::ValueType value_type = stack.back().GetValueType();
2901 switch (value_type)
2902 {
2903 default:
2904 case Value::eValueTypeScalar: // raw scalar value
2905 if (error_ptr)
2906 error_ptr->SetErrorString("Top stack item isn't a memory based object.");
2907 return false;
2908
2909 case Value::eValueTypeLoadAddress: // load address value
2910 case Value::eValueTypeFileAddress: // file address value
2911 case Value::eValueTypeHostAddress: // host address value (for memory in the process that is using liblldb)
2912 // Taking the address of an object reduces it to the address
2913 // of the value and removes any extra context it had.
2914 //stack.back().SetValueType(Value::eValueTypeScalar);
2915 stack.back().ClearContext();
2916 break;
2917 }
2918 }
2919 break;
2920
2921 //----------------------------------------------------------------------
2922 // OPCODE: DW_OP_APPLE_value_of
2923 // OPERANDS: none
2924 // DESCRIPTION: Pops a value off of the stack and pushed its value.
2925 // The top item on the stack must be a variable, expression variable.
2926 //----------------------------------------------------------------------
2927 case DW_OP_APPLE_value_of:
2928 if (stack.empty())
2929 {
2930 if (error_ptr)
2931 error_ptr->SetErrorString("Expression stack needs at least 1 items for DW_OP_APPLE_value_of.");
2932 return false;
2933 }
2934 else if (!stack.back().ValueOf(exe_ctx, ast_context))
2935 {
2936 if (error_ptr)
2937 error_ptr->SetErrorString ("Top stack item isn't a valid candidate for DW_OP_APPLE_value_of.");
2938 return false;
2939 }
2940 break;
2941
2942 //----------------------------------------------------------------------
2943 // OPCODE: DW_OP_APPLE_deref_type
2944 // OPERANDS: none
2945 // DESCRIPTION: gets the value pointed to by the top stack item
2946 //----------------------------------------------------------------------
2947 case DW_OP_APPLE_deref_type:
2948 {
2949 if (stack.empty())
2950 {
2951 if (error_ptr)
2952 error_ptr->SetErrorString("Expression stack needs at least 1 items for DW_OP_APPLE_deref_type.");
2953 return false;
2954 }
2955
2956 tmp = stack.back();
2957 stack.pop_back();
2958
Greg Clayton6916e352010-11-13 03:52:47 +0000[diff] [blame]2959 if (tmp.GetContextType() != Value::eContextTypeClangType)
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2960 {
2961 if (error_ptr)
2962 error_ptr->SetErrorString("Item at top of expression stack must have a Clang type");
2963 return false;
2964 }
2965
Greg Clayton462d4142010-09-29 01:12:09 +0000[diff] [blame]2966 void *ptr_type = tmp.GetClangType();
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2967 void *target_type;
2968
2969 if (!ClangASTContext::IsPointerType(ptr_type, &target_type))
2970 {
2971 if (error_ptr)
2972 error_ptr->SetErrorString("Dereferencing a non-pointer type");
2973 return false;
2974 }
2975
2976 // TODO do we want all pointers to be dereferenced as load addresses?
2977 Value::ValueType value_type = tmp.GetValueType();
2978
2979 tmp.ResolveValue(exe_ctx, ast_context);
2980
2981 tmp.SetValueType(value_type);
Greg Clayton6916e352010-11-13 03:52:47 +0000[diff] [blame]2982 tmp.SetContext(Value::eContextTypeClangType, target_type);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2983
2984 stack.push_back(tmp);
2985 }
2986 break;
2987
2988 //----------------------------------------------------------------------
2989 // OPCODE: DW_OP_APPLE_expr_local
2990 // OPERANDS: ULEB128
2991 // DESCRIPTION: pushes the expression local variable index onto the
2992 // stack and set the appropriate context so we know the stack item is
2993 // an expression local variable index.
2994 //----------------------------------------------------------------------
2995 case DW_OP_APPLE_expr_local:
2996 {
Sean Callanana6223432010-08-20 01:02:30 +0000[diff] [blame]2997 /*
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]2998 uint32_t idx = opcodes.GetULEB128(&offset);
2999 if (expr_locals == NULL)
3000 {
3001 if (error_ptr)
3002 error_ptr->SetErrorStringWithFormat ("DW_OP_APPLE_expr_local(%u) opcode encountered with no local variable list.\n", idx);
3003 return false;
3004 }
3005 Value *expr_local_variable = expr_locals->GetVariableAtIndex(idx);
3006 if (expr_local_variable == NULL)
3007 {
3008 if (error_ptr)
3009 error_ptr->SetErrorStringWithFormat ("DW_OP_APPLE_expr_local(%u) with invalid index %u.\n", idx, idx);
3010 return false;
3011 }
Greg Clayton801417e2011-07-07 01:59:51 +0000[diff] [blame]3012 // The proxy code has been removed. If it is ever re-added, please
3013 // use shared pointers or return by value to avoid possible memory
3014 // leak (there is no leak here, but in general, no returning pointers
3015 // that must be manually freed please.
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3016 Value *proxy = expr_local_variable->CreateProxy();
3017 stack.push_back(*proxy);
3018 delete proxy;
Greg Clayton6916e352010-11-13 03:52:47 +0000[diff] [blame]3019 //stack.back().SetContext (Value::eContextTypeClangType, expr_local_variable->GetClangType());
Sean Callanana6223432010-08-20 01:02:30 +0000[diff] [blame]3020 */
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3021 }
3022 break;
3023
3024 //----------------------------------------------------------------------
3025 // OPCODE: DW_OP_APPLE_extern
3026 // OPERANDS: ULEB128
3027 // DESCRIPTION: pushes a proxy for the extern object index onto the
3028 // stack.
3029 //----------------------------------------------------------------------
3030 case DW_OP_APPLE_extern:
3031 {
Sean Callanan8c127202010-08-23 23:09:38 +0000[diff] [blame]3032 /*
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3033 uint32_t idx = opcodes.GetULEB128(&offset);
3034 if (!decl_map)
3035 {
3036 if (error_ptr)
3037 error_ptr->SetErrorStringWithFormat ("DW_OP_APPLE_extern(%u) opcode encountered with no decl map.\n", idx);
3038 return false;
3039 }
3040 Value *extern_var = decl_map->GetValueForIndex(idx);
3041 if (!extern_var)
3042 {
3043 if (error_ptr)
3044 error_ptr->SetErrorStringWithFormat ("DW_OP_APPLE_extern(%u) with invalid index %u.\n", idx, idx);
3045 return false;
3046 }
Greg Clayton801417e2011-07-07 01:59:51 +0000[diff] [blame]3047 // The proxy code has been removed. If it is ever re-added, please
3048 // use shared pointers or return by value to avoid possible memory
3049 // leak (there is no leak here, but in general, no returning pointers
3050 // that must be manually freed please.
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3051 Value *proxy = extern_var->CreateProxy();
3052 stack.push_back(*proxy);
3053 delete proxy;
Sean Callanan8c127202010-08-23 23:09:38 +0000[diff] [blame]3054 */
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3055 }
3056 break;
3057
3058 case DW_OP_APPLE_scalar_cast:
3059 if (stack.empty())
3060 {
3061 if (error_ptr)
3062 error_ptr->SetErrorString("Expression stack needs at least 1 item for DW_OP_APPLE_scalar_cast.");
3063 return false;
3064 }
3065 else
3066 {
3067 // Simple scalar cast
3068 if (!stack.back().ResolveValue(exe_ctx, ast_context).Cast((Scalar::Type)opcodes.GetU8(&offset)))
3069 {
3070 if (error_ptr)
3071 error_ptr->SetErrorString("Cast failed.");
3072 return false;
3073 }
3074 }
3075 break;
3076
3077
3078 case DW_OP_APPLE_clang_cast:
3079 if (stack.empty())
3080 {
3081 if (error_ptr)
3082 error_ptr->SetErrorString("Expression stack needs at least 1 item for DW_OP_APPLE_clang_cast.");
3083 return false;
3084 }
3085 else
3086 {
3087 void *clang_type = (void *)opcodes.GetMaxU64(&offset, sizeof(void*));
Greg Clayton6916e352010-11-13 03:52:47 +0000[diff] [blame]3088 stack.back().SetContext (Value::eContextTypeClangType, clang_type);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3089 }
3090 break;
3091 //----------------------------------------------------------------------
3092 // OPCODE: DW_OP_APPLE_constf
3093 // OPERANDS: 1 byte float length, followed by that many bytes containing
3094 // the constant float data.
3095 // DESCRIPTION: Push a float value onto the expression stack.
3096 //----------------------------------------------------------------------
3097 case DW_OP_APPLE_constf: // 0xF6 - 1 byte float size, followed by constant float data
3098 {
3099 uint8_t float_length = opcodes.GetU8(&offset);
3100 if (sizeof(float) == float_length)
3101 tmp.ResolveValue(exe_ctx, ast_context) = opcodes.GetFloat (&offset);
3102 else if (sizeof(double) == float_length)
3103 tmp.ResolveValue(exe_ctx, ast_context) = opcodes.GetDouble (&offset);
3104 else if (sizeof(long double) == float_length)
3105 tmp.ResolveValue(exe_ctx, ast_context) = opcodes.GetLongDouble (&offset);
3106 else
3107 {
3108 StreamString new_value;
3109 opcodes.Dump(&new_value, offset, eFormatBytes, 1, float_length, UINT32_MAX, DW_INVALID_ADDRESS, 0, 0);
3110
3111 if (error_ptr)
3112 error_ptr->SetErrorStringWithFormat ("DW_OP_APPLE_constf(<%u> %s) unsupported float size.\n", float_length, new_value.GetData());
3113 return false;
3114 }
3115 tmp.SetValueType(Value::eValueTypeScalar);
3116 tmp.ClearContext();
3117 stack.push_back(tmp);
3118 }
3119 break;
3120 //----------------------------------------------------------------------
3121 // OPCODE: DW_OP_APPLE_clear
3122 // OPERANDS: none
3123 // DESCRIPTION: Clears the expression stack.
3124 //----------------------------------------------------------------------
3125 case DW_OP_APPLE_clear:
3126 stack.clear();
3127 break;
3128
3129 //----------------------------------------------------------------------
3130 // OPCODE: DW_OP_APPLE_error
3131 // OPERANDS: none
3132 // DESCRIPTION: Pops a value off of the stack and pushed its value.
3133 // The top item on the stack must be a variable, expression variable.
3134 //----------------------------------------------------------------------
3135 case DW_OP_APPLE_error: // 0xFF - Stops expression evaluation and returns an error (no args)
3136 if (error_ptr)
3137 error_ptr->SetErrorString ("Generic error.");
3138 return false;
Greg Claytona1b9a902011-11-13 04:15:56 +0000[diff] [blame]3139#endif // #if 0
3140
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3141 }
3142 }
3143
3144 if (stack.empty())
3145 {
3146 if (error_ptr)
3147 error_ptr->SetErrorString ("Stack empty after evaluation.");
3148 return false;
3149 }
Sean Callanan67bbb112011-10-14 20:34:21 +0000[diff] [blame]3150 else if (log && log->GetVerbose())
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3151 {
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3152 size_t count = stack.size();
Jason Molenda7e5fa7f2011-09-20 21:44:10 +0000[diff] [blame]3153 log->Printf("Stack after operation has %lu values:", count);
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3154 for (size_t i=0; i<count; ++i)
3155 {
3156 StreamString new_value;
3157 new_value.Printf("[%zu]", i);
3158 stack[i].Dump(&new_value);
Sean Callanan6184dfe2010-06-23 00:47:48 +0000[diff] [blame]3159 log->Printf(" %s", new_value.GetData());
Chris Lattner24943d22010-06-08 16:52:24 +0000[diff] [blame]3160 }
3161 }
3162
3163 result = stack.back();
3164 return true; // Return true on success
3165}
3166