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gerrit-public.fairphone.software / toolchain / llvm-project / 30bfa3623b6ec59fc03cba486040eef77cd5f847 / . / lldb / source / Expression / DWARFExpression.cpp
blob: b36be8e545d9d276255e225269c8d22e8c720546 [file] [log] [blame]
Chris Lattner30fdc8d2010-06-08 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
Virgile Bellobdae3782013-08-28 12:14:27 +0000[diff] [blame]12// C Includes
13#include <inttypes.h>
14
15// C++ Includes
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]16#include <vector>
17
Greg Clayton2fc93ea2011-11-13 04:15:56 +0000[diff] [blame]18#include "lldb/Core/DataEncoder.h"
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]19#include "lldb/Core/dwarf.h"
20#include "lldb/Core/Log.h"
Greg Clayton7349bd92011-05-09 20:18:18 +0000[diff] [blame]21#include "lldb/Core/RegisterValue.h"
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]22#include "lldb/Core/StreamString.h"
23#include "lldb/Core/Scalar.h"
24#include "lldb/Core/Value.h"
Greg Clayton016a95e2010-09-14 02:20:48 +0000[diff] [blame]25#include "lldb/Core/VMRange.h"
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]26
27#include "lldb/Expression/ClangExpressionDeclMap.h"
28#include "lldb/Expression/ClangExpressionVariable.h"
29
Greg Clayton7fb56d02011-02-01 01:31:41 +0000[diff] [blame]30#include "lldb/Host/Endian.h"
Jim Inghamf220d592011-12-01 03:01:30 +0000[diff] [blame]31#include "lldb/Host/Host.h"
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]32
33#include "lldb/lldb-private-log.h"
34
Greg Claytonafacd142011-09-02 01:15:17 +0000[diff] [blame]35#include "lldb/Target/ABI.h"
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]36#include "lldb/Target/ExecutionContext.h"
37#include "lldb/Target/Process.h"
38#include "lldb/Target/RegisterContext.h"
39#include "lldb/Target/StackFrame.h"
Ashok Thirumurthi6e264d32013-07-29 16:05:11 +0000[diff] [blame]40#include "lldb/Target/StackID.h"
Richard Mitton0a558352013-10-17 21:14:00 +0000[diff] [blame]41#include "lldb/Target/Thread.h"
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]42
43using namespace lldb;
44using namespace lldb_private;
45
Richard Mitton0a558352013-10-17 21:14:00 +0000[diff] [blame]46// TODO- why is this also defined (in a better way) in DWARFDefines.cpp?
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]47const char *
48DW_OP_value_to_name (uint32_t val)
49{
50 static char invalid[100];
51 switch (val) {
52 case 0x03: return "DW_OP_addr";
53 case 0x06: return "DW_OP_deref";
54 case 0x08: return "DW_OP_const1u";
55 case 0x09: return "DW_OP_const1s";
56 case 0x0a: return "DW_OP_const2u";
57 case 0x0b: return "DW_OP_const2s";
58 case 0x0c: return "DW_OP_const4u";
59 case 0x0d: return "DW_OP_const4s";
60 case 0x0e: return "DW_OP_const8u";
61 case 0x0f: return "DW_OP_const8s";
62 case 0x10: return "DW_OP_constu";
63 case 0x11: return "DW_OP_consts";
64 case 0x12: return "DW_OP_dup";
65 case 0x13: return "DW_OP_drop";
66 case 0x14: return "DW_OP_over";
67 case 0x15: return "DW_OP_pick";
68 case 0x16: return "DW_OP_swap";
69 case 0x17: return "DW_OP_rot";
70 case 0x18: return "DW_OP_xderef";
71 case 0x19: return "DW_OP_abs";
72 case 0x1a: return "DW_OP_and";
73 case 0x1b: return "DW_OP_div";
74 case 0x1c: return "DW_OP_minus";
75 case 0x1d: return "DW_OP_mod";
76 case 0x1e: return "DW_OP_mul";
77 case 0x1f: return "DW_OP_neg";
78 case 0x20: return "DW_OP_not";
79 case 0x21: return "DW_OP_or";
80 case 0x22: return "DW_OP_plus";
81 case 0x23: return "DW_OP_plus_uconst";
82 case 0x24: return "DW_OP_shl";
83 case 0x25: return "DW_OP_shr";
84 case 0x26: return "DW_OP_shra";
85 case 0x27: return "DW_OP_xor";
86 case 0x2f: return "DW_OP_skip";
87 case 0x28: return "DW_OP_bra";
88 case 0x29: return "DW_OP_eq";
89 case 0x2a: return "DW_OP_ge";
90 case 0x2b: return "DW_OP_gt";
91 case 0x2c: return "DW_OP_le";
92 case 0x2d: return "DW_OP_lt";
93 case 0x2e: return "DW_OP_ne";
94 case 0x30: return "DW_OP_lit0";
95 case 0x31: return "DW_OP_lit1";
96 case 0x32: return "DW_OP_lit2";
97 case 0x33: return "DW_OP_lit3";
98 case 0x34: return "DW_OP_lit4";
99 case 0x35: return "DW_OP_lit5";
100 case 0x36: return "DW_OP_lit6";
101 case 0x37: return "DW_OP_lit7";
102 case 0x38: return "DW_OP_lit8";
103 case 0x39: return "DW_OP_lit9";
104 case 0x3a: return "DW_OP_lit10";
105 case 0x3b: return "DW_OP_lit11";
106 case 0x3c: return "DW_OP_lit12";
107 case 0x3d: return "DW_OP_lit13";
108 case 0x3e: return "DW_OP_lit14";
109 case 0x3f: return "DW_OP_lit15";
110 case 0x40: return "DW_OP_lit16";
111 case 0x41: return "DW_OP_lit17";
112 case 0x42: return "DW_OP_lit18";
113 case 0x43: return "DW_OP_lit19";
114 case 0x44: return "DW_OP_lit20";
115 case 0x45: return "DW_OP_lit21";
116 case 0x46: return "DW_OP_lit22";
117 case 0x47: return "DW_OP_lit23";
118 case 0x48: return "DW_OP_lit24";
119 case 0x49: return "DW_OP_lit25";
120 case 0x4a: return "DW_OP_lit26";
121 case 0x4b: return "DW_OP_lit27";
122 case 0x4c: return "DW_OP_lit28";
123 case 0x4d: return "DW_OP_lit29";
124 case 0x4e: return "DW_OP_lit30";
125 case 0x4f: return "DW_OP_lit31";
126 case 0x50: return "DW_OP_reg0";
127 case 0x51: return "DW_OP_reg1";
128 case 0x52: return "DW_OP_reg2";
129 case 0x53: return "DW_OP_reg3";
130 case 0x54: return "DW_OP_reg4";
131 case 0x55: return "DW_OP_reg5";
132 case 0x56: return "DW_OP_reg6";
133 case 0x57: return "DW_OP_reg7";
134 case 0x58: return "DW_OP_reg8";
135 case 0x59: return "DW_OP_reg9";
136 case 0x5a: return "DW_OP_reg10";
137 case 0x5b: return "DW_OP_reg11";
138 case 0x5c: return "DW_OP_reg12";
139 case 0x5d: return "DW_OP_reg13";
140 case 0x5e: return "DW_OP_reg14";
141 case 0x5f: return "DW_OP_reg15";
142 case 0x60: return "DW_OP_reg16";
143 case 0x61: return "DW_OP_reg17";
144 case 0x62: return "DW_OP_reg18";
145 case 0x63: return "DW_OP_reg19";
146 case 0x64: return "DW_OP_reg20";
147 case 0x65: return "DW_OP_reg21";
148 case 0x66: return "DW_OP_reg22";
149 case 0x67: return "DW_OP_reg23";
150 case 0x68: return "DW_OP_reg24";
151 case 0x69: return "DW_OP_reg25";
152 case 0x6a: return "DW_OP_reg26";
153 case 0x6b: return "DW_OP_reg27";
154 case 0x6c: return "DW_OP_reg28";
155 case 0x6d: return "DW_OP_reg29";
156 case 0x6e: return "DW_OP_reg30";
157 case 0x6f: return "DW_OP_reg31";
158 case 0x70: return "DW_OP_breg0";
159 case 0x71: return "DW_OP_breg1";
160 case 0x72: return "DW_OP_breg2";
161 case 0x73: return "DW_OP_breg3";
162 case 0x74: return "DW_OP_breg4";
163 case 0x75: return "DW_OP_breg5";
164 case 0x76: return "DW_OP_breg6";
165 case 0x77: return "DW_OP_breg7";
166 case 0x78: return "DW_OP_breg8";
167 case 0x79: return "DW_OP_breg9";
168 case 0x7a: return "DW_OP_breg10";
169 case 0x7b: return "DW_OP_breg11";
170 case 0x7c: return "DW_OP_breg12";
171 case 0x7d: return "DW_OP_breg13";
172 case 0x7e: return "DW_OP_breg14";
173 case 0x7f: return "DW_OP_breg15";
174 case 0x80: return "DW_OP_breg16";
175 case 0x81: return "DW_OP_breg17";
176 case 0x82: return "DW_OP_breg18";
177 case 0x83: return "DW_OP_breg19";
178 case 0x84: return "DW_OP_breg20";
179 case 0x85: return "DW_OP_breg21";
180 case 0x86: return "DW_OP_breg22";
181 case 0x87: return "DW_OP_breg23";
182 case 0x88: return "DW_OP_breg24";
183 case 0x89: return "DW_OP_breg25";
184 case 0x8a: return "DW_OP_breg26";
185 case 0x8b: return "DW_OP_breg27";
186 case 0x8c: return "DW_OP_breg28";
187 case 0x8d: return "DW_OP_breg29";
188 case 0x8e: return "DW_OP_breg30";
189 case 0x8f: return "DW_OP_breg31";
190 case 0x90: return "DW_OP_regx";
191 case 0x91: return "DW_OP_fbreg";
192 case 0x92: return "DW_OP_bregx";
193 case 0x93: return "DW_OP_piece";
194 case 0x94: return "DW_OP_deref_size";
195 case 0x95: return "DW_OP_xderef_size";
196 case 0x96: return "DW_OP_nop";
197 case 0x97: return "DW_OP_push_object_address";
198 case 0x98: return "DW_OP_call2";
199 case 0x99: return "DW_OP_call4";
200 case 0x9a: return "DW_OP_call_ref";
Greg Clayton2fc93ea2011-11-13 04:15:56 +0000[diff] [blame]201// case DW_OP_APPLE_array_ref: return "DW_OP_APPLE_array_ref";
202// case DW_OP_APPLE_extern: return "DW_OP_APPLE_extern";
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]203 case DW_OP_APPLE_uninit: return "DW_OP_APPLE_uninit";
Greg Clayton2fc93ea2011-11-13 04:15:56 +0000[diff] [blame]204// case DW_OP_APPLE_assign: return "DW_OP_APPLE_assign";
205// case DW_OP_APPLE_address_of: return "DW_OP_APPLE_address_of";
206// case DW_OP_APPLE_value_of: return "DW_OP_APPLE_value_of";
207// case DW_OP_APPLE_deref_type: return "DW_OP_APPLE_deref_type";
208// case DW_OP_APPLE_expr_local: return "DW_OP_APPLE_expr_local";
209// case DW_OP_APPLE_constf: return "DW_OP_APPLE_constf";
210// case DW_OP_APPLE_scalar_cast: return "DW_OP_APPLE_scalar_cast";
211// case DW_OP_APPLE_clang_cast: return "DW_OP_APPLE_clang_cast";
212// case DW_OP_APPLE_clear: return "DW_OP_APPLE_clear";
213// case DW_OP_APPLE_error: return "DW_OP_APPLE_error";
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]214 default:
215 snprintf (invalid, sizeof(invalid), "Unknown DW_OP constant: 0x%x", val);
216 return invalid;
217 }
218}
219
220
221//----------------------------------------------------------------------
222// DWARFExpression constructor
223//----------------------------------------------------------------------
224DWARFExpression::DWARFExpression() :
Richard Mitton0a558352013-10-17 21:14:00 +0000[diff] [blame]225 m_module_wp(),
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]226 m_data(),
227 m_reg_kind (eRegisterKindDWARF),
Greg Clayton1a65ae12011-01-25 23:55:37 +0000[diff] [blame]228 m_loclist_slide (LLDB_INVALID_ADDRESS)
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]229{
230}
231
232DWARFExpression::DWARFExpression(const DWARFExpression& rhs) :
Richard Mitton0a558352013-10-17 21:14:00 +0000[diff] [blame]233 m_module_wp(rhs.m_module_wp),
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]234 m_data(rhs.m_data),
235 m_reg_kind (rhs.m_reg_kind),
Greg Clayton1a65ae12011-01-25 23:55:37 +0000[diff] [blame]236 m_loclist_slide(rhs.m_loclist_slide)
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]237{
238}
239
240
Richard Mitton0a558352013-10-17 21:14:00 +0000[diff] [blame]241DWARFExpression::DWARFExpression(lldb::ModuleSP module_sp, const DataExtractor& data, lldb::offset_t data_offset, lldb::offset_t data_length) :
242 m_module_wp(),
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]243 m_data(data, data_offset, data_length),
244 m_reg_kind (eRegisterKindDWARF),
Greg Clayton1a65ae12011-01-25 23:55:37 +0000[diff] [blame]245 m_loclist_slide(LLDB_INVALID_ADDRESS)
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]246{
Richard Mitton0a558352013-10-17 21:14:00 +0000[diff] [blame]247 if (module_sp)
248 m_module_wp = module_sp;
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]249}
250
251//----------------------------------------------------------------------
252// Destructor
253//----------------------------------------------------------------------
254DWARFExpression::~DWARFExpression()
255{
256}
257
258
259bool
260DWARFExpression::IsValid() const
261{
262 return m_data.GetByteSize() > 0;
263}
264
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]265void
Greg Clayton016a95e2010-09-14 02:20:48 +0000[diff] [blame]266DWARFExpression::SetOpcodeData (const DataExtractor& data)
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]267{
268 m_data = data;
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]269}
270
271void
Richard Mitton0a558352013-10-17 21:14:00 +0000[diff] [blame]272DWARFExpression::CopyOpcodeData (lldb::ModuleSP module_sp, const DataExtractor& data, lldb::offset_t data_offset, lldb::offset_t data_length)
Greg Clayton8179bca2012-08-10 23:33:27 +0000[diff] [blame]273{
274 const uint8_t *bytes = data.PeekData(data_offset, data_length);
Greg Clayton7f4c7432012-08-11 00:49:14 +0000[diff] [blame]275 if (bytes)
276 {
Richard Mitton0a558352013-10-17 21:14:00 +0000[diff] [blame]277 m_module_wp = module_sp;
Greg Clayton7f4c7432012-08-11 00:49:14 +0000[diff] [blame]278 m_data.SetData(DataBufferSP(new DataBufferHeap(bytes, data_length)));
279 m_data.SetByteOrder(data.GetByteOrder());
280 m_data.SetAddressByteSize(data.GetAddressByteSize());
281 }
Greg Clayton8179bca2012-08-10 23:33:27 +0000[diff] [blame]282}
283
284void
Richard Mitton0a558352013-10-17 21:14:00 +0000[diff] [blame]285DWARFExpression::SetOpcodeData (lldb::ModuleSP module_sp, const DataExtractor& data, lldb::offset_t data_offset, lldb::offset_t data_length)
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]286{
Richard Mitton0a558352013-10-17 21:14:00 +0000[diff] [blame]287 m_module_wp = module_sp;
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]288 m_data.SetData(data, data_offset, data_length);
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]289}
290
291void
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]292DWARFExpression::DumpLocation (Stream *s, lldb::offset_t offset, lldb::offset_t length, lldb::DescriptionLevel level, ABI *abi) const
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]293{
294 if (!m_data.ValidOffsetForDataOfSize(offset, length))
295 return;
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]296 const lldb::offset_t start_offset = offset;
297 const lldb::offset_t end_offset = offset + length;
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]298 while (m_data.ValidOffset(offset) && offset < end_offset)
299 {
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]300 const lldb::offset_t op_offset = offset;
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]301 const uint8_t op = m_data.GetU8(&offset);
302
303 switch (level)
304 {
Greg Claytonc982c762010-07-09 20:39:50 +0000[diff] [blame]305 default:
306 break;
307
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]308 case lldb::eDescriptionLevelBrief:
309 if (offset > start_offset)
310 s->PutChar(' ');
311 break;
312
313 case lldb::eDescriptionLevelFull:
314 case lldb::eDescriptionLevelVerbose:
315 if (offset > start_offset)
316 s->EOL();
317 s->Indent();
318 if (level == lldb::eDescriptionLevelFull)
319 break;
320 // Fall through for verbose and print offset and DW_OP prefix..
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]321 s->Printf("0x%8.8" PRIx64 ": %s", op_offset, op >= DW_OP_APPLE_uninit ? "DW_OP_APPLE_" : "DW_OP_");
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]322 break;
323 }
324
325 switch (op)
326 {
Greg Claytonc749eb82011-07-11 05:12:02 +0000[diff] [blame]327 case DW_OP_addr: *s << "DW_OP_addr(" << m_data.GetAddress(&offset) << ") "; break; // 0x03 1 address
328 case DW_OP_deref: *s << "DW_OP_deref"; break; // 0x06
329 case DW_OP_const1u: s->Printf("DW_OP_const1u(0x%2.2x) ", m_data.GetU8(&offset)); break; // 0x08 1 1-byte constant
330 case DW_OP_const1s: s->Printf("DW_OP_const1s(0x%2.2x) ", m_data.GetU8(&offset)); break; // 0x09 1 1-byte constant
331 case DW_OP_const2u: s->Printf("DW_OP_const2u(0x%4.4x) ", m_data.GetU16(&offset)); break; // 0x0a 1 2-byte constant
332 case DW_OP_const2s: s->Printf("DW_OP_const2s(0x%4.4x) ", m_data.GetU16(&offset)); break; // 0x0b 1 2-byte constant
333 case DW_OP_const4u: s->Printf("DW_OP_const4u(0x%8.8x) ", m_data.GetU32(&offset)); break; // 0x0c 1 4-byte constant
334 case DW_OP_const4s: s->Printf("DW_OP_const4s(0x%8.8x) ", m_data.GetU32(&offset)); break; // 0x0d 1 4-byte constant
Daniel Malead01b2952012-11-29 21:49:15 +0000[diff] [blame]335 case DW_OP_const8u: s->Printf("DW_OP_const8u(0x%16.16" PRIx64 ") ", m_data.GetU64(&offset)); break; // 0x0e 1 8-byte constant
336 case DW_OP_const8s: s->Printf("DW_OP_const8s(0x%16.16" PRIx64 ") ", m_data.GetU64(&offset)); break; // 0x0f 1 8-byte constant
337 case DW_OP_constu: s->Printf("DW_OP_constu(0x%" PRIx64 ") ", m_data.GetULEB128(&offset)); break; // 0x10 1 ULEB128 constant
338 case DW_OP_consts: s->Printf("DW_OP_consts(0x%" PRId64 ") ", m_data.GetSLEB128(&offset)); break; // 0x11 1 SLEB128 constant
Greg Claytonc749eb82011-07-11 05:12:02 +0000[diff] [blame]339 case DW_OP_dup: s->PutCString("DW_OP_dup"); break; // 0x12
340 case DW_OP_drop: s->PutCString("DW_OP_drop"); break; // 0x13
341 case DW_OP_over: s->PutCString("DW_OP_over"); break; // 0x14
342 case DW_OP_pick: s->Printf("DW_OP_pick(0x%2.2x) ", m_data.GetU8(&offset)); break; // 0x15 1 1-byte stack index
343 case DW_OP_swap: s->PutCString("DW_OP_swap"); break; // 0x16
344 case DW_OP_rot: s->PutCString("DW_OP_rot"); break; // 0x17
345 case DW_OP_xderef: s->PutCString("DW_OP_xderef"); break; // 0x18
346 case DW_OP_abs: s->PutCString("DW_OP_abs"); break; // 0x19
347 case DW_OP_and: s->PutCString("DW_OP_and"); break; // 0x1a
348 case DW_OP_div: s->PutCString("DW_OP_div"); break; // 0x1b
349 case DW_OP_minus: s->PutCString("DW_OP_minus"); break; // 0x1c
350 case DW_OP_mod: s->PutCString("DW_OP_mod"); break; // 0x1d
351 case DW_OP_mul: s->PutCString("DW_OP_mul"); break; // 0x1e
352 case DW_OP_neg: s->PutCString("DW_OP_neg"); break; // 0x1f
353 case DW_OP_not: s->PutCString("DW_OP_not"); break; // 0x20
354 case DW_OP_or: s->PutCString("DW_OP_or"); break; // 0x21
355 case DW_OP_plus: s->PutCString("DW_OP_plus"); break; // 0x22
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]356 case DW_OP_plus_uconst: // 0x23 1 ULEB128 addend
Daniel Malead01b2952012-11-29 21:49:15 +0000[diff] [blame]357 s->Printf("DW_OP_plus_uconst(0x%" PRIx64 ") ", m_data.GetULEB128(&offset));
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]358 break;
359
Greg Claytonc749eb82011-07-11 05:12:02 +0000[diff] [blame]360 case DW_OP_shl: s->PutCString("DW_OP_shl"); break; // 0x24
361 case DW_OP_shr: s->PutCString("DW_OP_shr"); break; // 0x25
362 case DW_OP_shra: s->PutCString("DW_OP_shra"); break; // 0x26
363 case DW_OP_xor: s->PutCString("DW_OP_xor"); break; // 0x27
364 case DW_OP_skip: s->Printf("DW_OP_skip(0x%4.4x)", m_data.GetU16(&offset)); break; // 0x2f 1 signed 2-byte constant
365 case DW_OP_bra: s->Printf("DW_OP_bra(0x%4.4x)", m_data.GetU16(&offset)); break; // 0x28 1 signed 2-byte constant
366 case DW_OP_eq: s->PutCString("DW_OP_eq"); break; // 0x29
367 case DW_OP_ge: s->PutCString("DW_OP_ge"); break; // 0x2a
368 case DW_OP_gt: s->PutCString("DW_OP_gt"); break; // 0x2b
369 case DW_OP_le: s->PutCString("DW_OP_le"); break; // 0x2c
370 case DW_OP_lt: s->PutCString("DW_OP_lt"); break; // 0x2d
371 case DW_OP_ne: s->PutCString("DW_OP_ne"); break; // 0x2e
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]372
373 case DW_OP_lit0: // 0x30
374 case DW_OP_lit1: // 0x31
375 case DW_OP_lit2: // 0x32
376 case DW_OP_lit3: // 0x33
377 case DW_OP_lit4: // 0x34
378 case DW_OP_lit5: // 0x35
379 case DW_OP_lit6: // 0x36
380 case DW_OP_lit7: // 0x37
381 case DW_OP_lit8: // 0x38
382 case DW_OP_lit9: // 0x39
383 case DW_OP_lit10: // 0x3A
384 case DW_OP_lit11: // 0x3B
385 case DW_OP_lit12: // 0x3C
386 case DW_OP_lit13: // 0x3D
387 case DW_OP_lit14: // 0x3E
388 case DW_OP_lit15: // 0x3F
389 case DW_OP_lit16: // 0x40
390 case DW_OP_lit17: // 0x41
391 case DW_OP_lit18: // 0x42
392 case DW_OP_lit19: // 0x43
393 case DW_OP_lit20: // 0x44
394 case DW_OP_lit21: // 0x45
395 case DW_OP_lit22: // 0x46
396 case DW_OP_lit23: // 0x47
397 case DW_OP_lit24: // 0x48
398 case DW_OP_lit25: // 0x49
399 case DW_OP_lit26: // 0x4A
400 case DW_OP_lit27: // 0x4B
401 case DW_OP_lit28: // 0x4C
402 case DW_OP_lit29: // 0x4D
403 case DW_OP_lit30: // 0x4E
Greg Claytonc749eb82011-07-11 05:12:02 +0000[diff] [blame]404 case DW_OP_lit31: s->Printf("DW_OP_lit%i", op - DW_OP_lit0); break; // 0x4f
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]405
406 case DW_OP_reg0: // 0x50
407 case DW_OP_reg1: // 0x51
408 case DW_OP_reg2: // 0x52
409 case DW_OP_reg3: // 0x53
410 case DW_OP_reg4: // 0x54
411 case DW_OP_reg5: // 0x55
412 case DW_OP_reg6: // 0x56
413 case DW_OP_reg7: // 0x57
414 case DW_OP_reg8: // 0x58
415 case DW_OP_reg9: // 0x59
416 case DW_OP_reg10: // 0x5A
417 case DW_OP_reg11: // 0x5B
418 case DW_OP_reg12: // 0x5C
419 case DW_OP_reg13: // 0x5D
420 case DW_OP_reg14: // 0x5E
421 case DW_OP_reg15: // 0x5F
422 case DW_OP_reg16: // 0x60
423 case DW_OP_reg17: // 0x61
424 case DW_OP_reg18: // 0x62
425 case DW_OP_reg19: // 0x63
426 case DW_OP_reg20: // 0x64
427 case DW_OP_reg21: // 0x65
428 case DW_OP_reg22: // 0x66
429 case DW_OP_reg23: // 0x67
430 case DW_OP_reg24: // 0x68
431 case DW_OP_reg25: // 0x69
432 case DW_OP_reg26: // 0x6A
433 case DW_OP_reg27: // 0x6B
434 case DW_OP_reg28: // 0x6C
435 case DW_OP_reg29: // 0x6D
436 case DW_OP_reg30: // 0x6E
Greg Claytonafacd142011-09-02 01:15:17 +0000[diff] [blame]437 case DW_OP_reg31: // 0x6F
438 {
439 uint32_t reg_num = op - DW_OP_reg0;
440 if (abi)
441 {
442 RegisterInfo reg_info;
443 if (abi->GetRegisterInfoByKind(m_reg_kind, reg_num, reg_info))
444 {
445 if (reg_info.name)
446 {
447 s->PutCString (reg_info.name);
448 break;
449 }
450 else if (reg_info.alt_name)
451 {
452 s->PutCString (reg_info.alt_name);
453 break;
454 }
455 }
456 }
457 s->Printf("DW_OP_reg%u", reg_num); break;
458 }
459 break;
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]460
461 case DW_OP_breg0:
462 case DW_OP_breg1:
463 case DW_OP_breg2:
464 case DW_OP_breg3:
465 case DW_OP_breg4:
466 case DW_OP_breg5:
467 case DW_OP_breg6:
468 case DW_OP_breg7:
469 case DW_OP_breg8:
470 case DW_OP_breg9:
471 case DW_OP_breg10:
472 case DW_OP_breg11:
473 case DW_OP_breg12:
474 case DW_OP_breg13:
475 case DW_OP_breg14:
476 case DW_OP_breg15:
477 case DW_OP_breg16:
478 case DW_OP_breg17:
479 case DW_OP_breg18:
480 case DW_OP_breg19:
481 case DW_OP_breg20:
482 case DW_OP_breg21:
483 case DW_OP_breg22:
484 case DW_OP_breg23:
485 case DW_OP_breg24:
486 case DW_OP_breg25:
487 case DW_OP_breg26:
488 case DW_OP_breg27:
489 case DW_OP_breg28:
490 case DW_OP_breg29:
491 case DW_OP_breg30:
Greg Claytonafacd142011-09-02 01:15:17 +0000[diff] [blame]492 case DW_OP_breg31:
493 {
494 uint32_t reg_num = op - DW_OP_breg0;
495 int64_t reg_offset = m_data.GetSLEB128(&offset);
496 if (abi)
497 {
498 RegisterInfo reg_info;
499 if (abi->GetRegisterInfoByKind(m_reg_kind, reg_num, reg_info))
500 {
501 if (reg_info.name)
502 {
Daniel Malead01b2952012-11-29 21:49:15 +0000[diff] [blame]503 s->Printf("[%s%+" PRIi64 "]", reg_info.name, reg_offset);
Greg Claytonafacd142011-09-02 01:15:17 +0000[diff] [blame]504 break;
505 }
506 else if (reg_info.alt_name)
507 {
Daniel Malead01b2952012-11-29 21:49:15 +0000[diff] [blame]508 s->Printf("[%s%+" PRIi64 "]", reg_info.alt_name, reg_offset);
Greg Claytonafacd142011-09-02 01:15:17 +0000[diff] [blame]509 break;
510 }
511 }
512 }
Daniel Malead01b2952012-11-29 21:49:15 +0000[diff] [blame]513 s->Printf("DW_OP_breg%i(0x%" PRIx64 ")", reg_num, reg_offset);
Greg Claytonafacd142011-09-02 01:15:17 +0000[diff] [blame]514 }
515 break;
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]516
517 case DW_OP_regx: // 0x90 1 ULEB128 register
Greg Claytonafacd142011-09-02 01:15:17 +0000[diff] [blame]518 {
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]519 uint32_t reg_num = m_data.GetULEB128(&offset);
Greg Claytonafacd142011-09-02 01:15:17 +0000[diff] [blame]520 if (abi)
521 {
522 RegisterInfo reg_info;
523 if (abi->GetRegisterInfoByKind(m_reg_kind, reg_num, reg_info))
524 {
525 if (reg_info.name)
526 {
527 s->PutCString (reg_info.name);
528 break;
529 }
530 else if (reg_info.alt_name)
531 {
532 s->PutCString (reg_info.alt_name);
533 break;
534 }
535 }
536 }
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]537 s->Printf("DW_OP_regx(%" PRIu32 ")", reg_num); break;
Greg Claytonafacd142011-09-02 01:15:17 +0000[diff] [blame]538 }
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]539 break;
540 case DW_OP_fbreg: // 0x91 1 SLEB128 offset
Daniel Malead01b2952012-11-29 21:49:15 +0000[diff] [blame]541 s->Printf("DW_OP_fbreg(%" PRIi64 ")",m_data.GetSLEB128(&offset));
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]542 break;
543 case DW_OP_bregx: // 0x92 2 ULEB128 register followed by SLEB128 offset
Greg Claytonafacd142011-09-02 01:15:17 +0000[diff] [blame]544 {
545 uint32_t reg_num = m_data.GetULEB128(&offset);
546 int64_t reg_offset = m_data.GetSLEB128(&offset);
547 if (abi)
548 {
549 RegisterInfo reg_info;
550 if (abi->GetRegisterInfoByKind(m_reg_kind, reg_num, reg_info))
551 {
552 if (reg_info.name)
553 {
Daniel Malead01b2952012-11-29 21:49:15 +0000[diff] [blame]554 s->Printf("[%s%+" PRIi64 "]", reg_info.name, reg_offset);
Greg Claytonafacd142011-09-02 01:15:17 +0000[diff] [blame]555 break;
556 }
557 else if (reg_info.alt_name)
558 {
Daniel Malead01b2952012-11-29 21:49:15 +0000[diff] [blame]559 s->Printf("[%s%+" PRIi64 "]", reg_info.alt_name, reg_offset);
Greg Claytonafacd142011-09-02 01:15:17 +0000[diff] [blame]560 break;
561 }
562 }
563 }
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]564 s->Printf("DW_OP_bregx(reg=%" PRIu32 ",offset=%" PRIi64 ")", reg_num, reg_offset);
Greg Claytonafacd142011-09-02 01:15:17 +0000[diff] [blame]565 }
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]566 break;
567 case DW_OP_piece: // 0x93 1 ULEB128 size of piece addressed
Daniel Malead01b2952012-11-29 21:49:15 +0000[diff] [blame]568 s->Printf("DW_OP_piece(0x%" PRIx64 ")", m_data.GetULEB128(&offset));
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]569 break;
570 case DW_OP_deref_size: // 0x94 1 1-byte size of data retrieved
Greg Claytonc749eb82011-07-11 05:12:02 +0000[diff] [blame]571 s->Printf("DW_OP_deref_size(0x%2.2x)", m_data.GetU8(&offset));
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]572 break;
573 case DW_OP_xderef_size: // 0x95 1 1-byte size of data retrieved
Greg Claytonc749eb82011-07-11 05:12:02 +0000[diff] [blame]574 s->Printf("DW_OP_xderef_size(0x%2.2x)", m_data.GetU8(&offset));
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]575 break;
Greg Claytonc749eb82011-07-11 05:12:02 +0000[diff] [blame]576 case DW_OP_nop: s->PutCString("DW_OP_nop"); break; // 0x96
577 case DW_OP_push_object_address: s->PutCString("DW_OP_push_object_address"); break; // 0x97 DWARF3
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]578 case DW_OP_call2: // 0x98 DWARF3 1 2-byte offset of DIE
Greg Claytonc749eb82011-07-11 05:12:02 +0000[diff] [blame]579 s->Printf("DW_OP_call2(0x%4.4x)", m_data.GetU16(&offset));
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]580 break;
581 case DW_OP_call4: // 0x99 DWARF3 1 4-byte offset of DIE
Greg Claytonc749eb82011-07-11 05:12:02 +0000[diff] [blame]582 s->Printf("DW_OP_call4(0x%8.8x)", m_data.GetU32(&offset));
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]583 break;
584 case DW_OP_call_ref: // 0x9a DWARF3 1 4- or 8-byte offset of DIE
Daniel Malead01b2952012-11-29 21:49:15 +0000[diff] [blame]585 s->Printf("DW_OP_call_ref(0x%8.8" PRIx64 ")", m_data.GetAddress(&offset));
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]586 break;
587// case DW_OP_form_tls_address: s << "form_tls_address"; break; // 0x9b DWARF3
588// case DW_OP_call_frame_cfa: s << "call_frame_cfa"; break; // 0x9c DWARF3
589// case DW_OP_bit_piece: // 0x9d DWARF3 2
Greg Claytonc749eb82011-07-11 05:12:02 +0000[diff] [blame]590// s->Printf("DW_OP_bit_piece(0x%x, 0x%x)", m_data.GetULEB128(&offset), m_data.GetULEB128(&offset));
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]591// break;
Greg Claytonc749eb82011-07-11 05:12:02 +0000[diff] [blame]592// case DW_OP_lo_user: s->PutCString("DW_OP_lo_user"); break; // 0xe0
593// case DW_OP_hi_user: s->PutCString("DW_OP_hi_user"); break; // 0xff
Greg Clayton2fc93ea2011-11-13 04:15:56 +0000[diff] [blame]594// case DW_OP_APPLE_extern:
Daniel Malead01b2952012-11-29 21:49:15 +0000[diff] [blame]595// s->Printf("DW_OP_APPLE_extern(%" PRIu64 ")", m_data.GetULEB128(&offset));
Greg Clayton2fc93ea2011-11-13 04:15:56 +0000[diff] [blame]596// break;
597// case DW_OP_APPLE_array_ref:
598// s->PutCString("DW_OP_APPLE_array_ref");
599// break;
Richard Mitton0a558352013-10-17 21:14:00 +0000[diff] [blame]600 case DW_OP_GNU_push_tls_address:
601 s->PutCString("DW_OP_GNU_push_tls_address"); // 0xe0
602 break;
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]603 case DW_OP_APPLE_uninit:
Greg Claytonc749eb82011-07-11 05:12:02 +0000[diff] [blame]604 s->PutCString("DW_OP_APPLE_uninit"); // 0xF0
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]605 break;
Greg Clayton2fc93ea2011-11-13 04:15:56 +0000[diff] [blame]606// case DW_OP_APPLE_assign: // 0xF1 - pops value off and assigns it to second item on stack (2nd item must have assignable context)
607// s->PutCString("DW_OP_APPLE_assign");
608// break;
609// 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)
610// s->PutCString("DW_OP_APPLE_address_of");
611// break;
612// 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)
613// s->PutCString("DW_OP_APPLE_value_of");
614// break;
615// 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)
616// s->PutCString("DW_OP_APPLE_deref_type");
617// break;
618// case DW_OP_APPLE_expr_local: // 0xF5 - ULEB128 expression local index
Daniel Malead01b2952012-11-29 21:49:15 +0000[diff] [blame]619// s->Printf("DW_OP_APPLE_expr_local(%" PRIu64 ")", m_data.GetULEB128(&offset));
Greg Clayton2fc93ea2011-11-13 04:15:56 +0000[diff] [blame]620// break;
621// case DW_OP_APPLE_constf: // 0xF6 - 1 byte float size, followed by constant float data
622// {
623// uint8_t float_length = m_data.GetU8(&offset);
624// s->Printf("DW_OP_APPLE_constf(<%u> ", float_length);
625// m_data.Dump(s, offset, eFormatHex, float_length, 1, UINT32_MAX, DW_INVALID_ADDRESS, 0, 0);
626// s->PutChar(')');
627// // Consume the float data
628// m_data.GetData(&offset, float_length);
629// }
630// break;
631// case DW_OP_APPLE_scalar_cast:
632// s->Printf("DW_OP_APPLE_scalar_cast(%s)", Scalar::GetValueTypeAsCString ((Scalar::Type)m_data.GetU8(&offset)));
633// break;
634// case DW_OP_APPLE_clang_cast:
635// {
636// clang::Type *clang_type = (clang::Type *)m_data.GetMaxU64(&offset, sizeof(void*));
637// s->Printf("DW_OP_APPLE_clang_cast(%p)", clang_type);
638// }
639// break;
640// case DW_OP_APPLE_clear:
641// s->PutCString("DW_OP_APPLE_clear");
642// break;
643// case DW_OP_APPLE_error: // 0xFF - Stops expression evaluation and returns an error (no args)
644// s->PutCString("DW_OP_APPLE_error");
645// break;
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]646 }
647 }
648}
649
650void
Greg Clayton016a95e2010-09-14 02:20:48 +0000[diff] [blame]651DWARFExpression::SetLocationListSlide (addr_t slide)
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]652{
Greg Clayton016a95e2010-09-14 02:20:48 +0000[diff] [blame]653 m_loclist_slide = slide;
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]654}
655
656int
657DWARFExpression::GetRegisterKind ()
658{
659 return m_reg_kind;
660}
661
662void
Greg Claytonafacd142011-09-02 01:15:17 +0000[diff] [blame]663DWARFExpression::SetRegisterKind (RegisterKind reg_kind)
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]664{
665 m_reg_kind = reg_kind;
666}
667
668bool
669DWARFExpression::IsLocationList() const
670{
Greg Clayton016a95e2010-09-14 02:20:48 +0000[diff] [blame]671 return m_loclist_slide != LLDB_INVALID_ADDRESS;
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]672}
673
674void
Greg Claytonafacd142011-09-02 01:15:17 +0000[diff] [blame]675DWARFExpression::GetDescription (Stream *s, lldb::DescriptionLevel level, addr_t location_list_base_addr, ABI *abi) const
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]676{
677 if (IsLocationList())
678 {
679 // We have a location list
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]680 lldb::offset_t offset = 0;
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]681 uint32_t count = 0;
Greg Clayton016a95e2010-09-14 02:20:48 +0000[diff] [blame]682 addr_t curr_base_addr = location_list_base_addr;
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]683 while (m_data.ValidOffset(offset))
684 {
685 lldb::addr_t begin_addr_offset = m_data.GetAddress(&offset);
686 lldb::addr_t end_addr_offset = m_data.GetAddress(&offset);
687 if (begin_addr_offset < end_addr_offset)
688 {
689 if (count > 0)
690 s->PutCString(", ");
Greg Clayton016a95e2010-09-14 02:20:48 +0000[diff] [blame]691 VMRange addr_range(curr_base_addr + begin_addr_offset, curr_base_addr + end_addr_offset);
692 addr_range.Dump(s, 0, 8);
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]693 s->PutChar('{');
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]694 lldb::offset_t location_length = m_data.GetU16(&offset);
Greg Claytonafacd142011-09-02 01:15:17 +0000[diff] [blame]695 DumpLocation (s, offset, location_length, level, abi);
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]696 s->PutChar('}');
697 offset += location_length;
698 }
699 else if (begin_addr_offset == 0 && end_addr_offset == 0)
700 {
701 // The end of the location list is marked by both the start and end offset being zero
702 break;
703 }
704 else
705 {
Greg Claytone0d378b2011-03-24 21:19:54 +0000[diff] [blame]706 if ((m_data.GetAddressByteSize() == 4 && (begin_addr_offset == UINT32_MAX)) ||
707 (m_data.GetAddressByteSize() == 8 && (begin_addr_offset == UINT64_MAX)))
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]708 {
Greg Clayton016a95e2010-09-14 02:20:48 +0000[diff] [blame]709 curr_base_addr = end_addr_offset + location_list_base_addr;
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]710 // We have a new base address
711 if (count > 0)
712 s->PutCString(", ");
713 *s << "base_addr = " << end_addr_offset;
714 }
715 }
716
717 count++;
718 }
719 }
720 else
721 {
722 // We have a normal location that contains DW_OP location opcodes
Greg Claytonafacd142011-09-02 01:15:17 +0000[diff] [blame]723 DumpLocation (s, 0, m_data.GetByteSize(), level, abi);
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]724 }
725}
726
727static bool
728ReadRegisterValueAsScalar
729(
Greg Clayton7349bd92011-05-09 20:18:18 +0000[diff] [blame]730 RegisterContext *reg_ctx,
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]731 uint32_t reg_kind,
732 uint32_t reg_num,
733 Error *error_ptr,
734 Value &value
735)
736{
Greg Clayton7349bd92011-05-09 20:18:18 +0000[diff] [blame]737 if (reg_ctx == NULL)
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]738 {
Jason Molenda2d107dd2010-11-20 01:28:30 +0000[diff] [blame]739 if (error_ptr)
740 error_ptr->SetErrorStringWithFormat("No register context in frame.\n");
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]741 }
742 else
743 {
Greg Clayton7349bd92011-05-09 20:18:18 +0000[diff] [blame]744 uint32_t native_reg = reg_ctx->ConvertRegisterKindToRegisterNumber(reg_kind, reg_num);
Jason Molenda2d107dd2010-11-20 01:28:30 +0000[diff] [blame]745 if (native_reg == LLDB_INVALID_REGNUM)
746 {
747 if (error_ptr)
748 error_ptr->SetErrorStringWithFormat("Unable to convert register kind=%u reg_num=%u to a native register number.\n", reg_kind, reg_num);
749 }
750 else
751 {
Greg Clayton7349bd92011-05-09 20:18:18 +0000[diff] [blame]752 const RegisterInfo *reg_info = reg_ctx->GetRegisterInfoAtIndex(native_reg);
753 RegisterValue reg_value;
754 if (reg_ctx->ReadRegister (reg_info, reg_value))
755 {
756 if (reg_value.GetScalarValue(value.GetScalar()))
757 {
758 value.SetValueType (Value::eValueTypeScalar);
Greg Clayton007d5be2011-05-30 00:49:24 +0000[diff] [blame]759 value.SetContext (Value::eContextTypeRegisterInfo,
760 const_cast<RegisterInfo *>(reg_info));
Greg Clayton7349bd92011-05-09 20:18:18 +0000[diff] [blame]761 if (error_ptr)
762 error_ptr->Clear();
763 return true;
764 }
765 else
766 {
Greg Clayton007d5be2011-05-30 00:49:24 +0000[diff] [blame]767 // If we get this error, then we need to implement a value
768 // buffer in the dwarf expression evaluation function...
Greg Clayton7349bd92011-05-09 20:18:18 +0000[diff] [blame]769 if (error_ptr)
Greg Clayton007d5be2011-05-30 00:49:24 +0000[diff] [blame]770 error_ptr->SetErrorStringWithFormat ("register %s can't be converted to a scalar value",
771 reg_info->name);
Greg Clayton7349bd92011-05-09 20:18:18 +0000[diff] [blame]772 }
773 }
774 else
775 {
776 if (error_ptr)
Greg Clayton007d5be2011-05-30 00:49:24 +0000[diff] [blame]777 error_ptr->SetErrorStringWithFormat("register %s is not available", reg_info->name);
Greg Clayton7349bd92011-05-09 20:18:18 +0000[diff] [blame]778 }
Jason Molenda2d107dd2010-11-20 01:28:30 +0000[diff] [blame]779 }
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]780 }
781 return false;
782}
783
Greg Clayton016a95e2010-09-14 02:20:48 +0000[diff] [blame]784//bool
785//DWARFExpression::LocationListContainsLoadAddress (Process* process, const Address &addr) const
786//{
787// return LocationListContainsLoadAddress(process, addr.GetLoadAddress(process));
788//}
789//
790//bool
791//DWARFExpression::LocationListContainsLoadAddress (Process* process, addr_t load_addr) const
792//{
793// if (load_addr == LLDB_INVALID_ADDRESS)
794// return false;
795//
796// if (IsLocationList())
797// {
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]798// lldb::offset_t offset = 0;
Greg Clayton016a95e2010-09-14 02:20:48 +0000[diff] [blame]799//
800// addr_t loc_list_base_addr = m_loclist_slide.GetLoadAddress(process);
801//
802// if (loc_list_base_addr == LLDB_INVALID_ADDRESS)
803// return false;
804//
805// while (m_data.ValidOffset(offset))
806// {
807// // We need to figure out what the value is for the location.
808// addr_t lo_pc = m_data.GetAddress(&offset);
809// addr_t hi_pc = m_data.GetAddress(&offset);
810// if (lo_pc == 0 && hi_pc == 0)
811// break;
812// else
813// {
814// lo_pc += loc_list_base_addr;
815// hi_pc += loc_list_base_addr;
816//
817// if (lo_pc <= load_addr && load_addr < hi_pc)
818// return true;
819//
820// offset += m_data.GetU16(&offset);
821// }
822// }
823// }
824// return false;
825//}
Greg Clayton9da7bd02010-08-24 21:05:24 +0000[diff] [blame]826
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]827static offset_t
828GetOpcodeDataSize (const DataExtractor &data, const lldb::offset_t data_offset, const uint8_t op)
Greg Clayton2fc93ea2011-11-13 04:15:56 +0000[diff] [blame]829{
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]830 lldb::offset_t offset = data_offset;
Greg Clayton2fc93ea2011-11-13 04:15:56 +0000[diff] [blame]831 switch (op)
832 {
833 case DW_OP_addr:
834 case DW_OP_call_ref: // 0x9a 1 address sized offset of DIE (DWARF3)
835 return data.GetAddressByteSize();
836
837 // Opcodes with no arguments
838 case DW_OP_deref: // 0x06
839 case DW_OP_dup: // 0x12
840 case DW_OP_drop: // 0x13
841 case DW_OP_over: // 0x14
842 case DW_OP_swap: // 0x16
843 case DW_OP_rot: // 0x17
844 case DW_OP_xderef: // 0x18
845 case DW_OP_abs: // 0x19
846 case DW_OP_and: // 0x1a
847 case DW_OP_div: // 0x1b
848 case DW_OP_minus: // 0x1c
849 case DW_OP_mod: // 0x1d
850 case DW_OP_mul: // 0x1e
851 case DW_OP_neg: // 0x1f
852 case DW_OP_not: // 0x20
853 case DW_OP_or: // 0x21
854 case DW_OP_plus: // 0x22
855 case DW_OP_shl: // 0x24
856 case DW_OP_shr: // 0x25
857 case DW_OP_shra: // 0x26
858 case DW_OP_xor: // 0x27
859 case DW_OP_eq: // 0x29
860 case DW_OP_ge: // 0x2a
861 case DW_OP_gt: // 0x2b
862 case DW_OP_le: // 0x2c
863 case DW_OP_lt: // 0x2d
864 case DW_OP_ne: // 0x2e
865 case DW_OP_lit0: // 0x30
866 case DW_OP_lit1: // 0x31
867 case DW_OP_lit2: // 0x32
868 case DW_OP_lit3: // 0x33
869 case DW_OP_lit4: // 0x34
870 case DW_OP_lit5: // 0x35
871 case DW_OP_lit6: // 0x36
872 case DW_OP_lit7: // 0x37
873 case DW_OP_lit8: // 0x38
874 case DW_OP_lit9: // 0x39
875 case DW_OP_lit10: // 0x3A
876 case DW_OP_lit11: // 0x3B
877 case DW_OP_lit12: // 0x3C
878 case DW_OP_lit13: // 0x3D
879 case DW_OP_lit14: // 0x3E
880 case DW_OP_lit15: // 0x3F
881 case DW_OP_lit16: // 0x40
882 case DW_OP_lit17: // 0x41
883 case DW_OP_lit18: // 0x42
884 case DW_OP_lit19: // 0x43
885 case DW_OP_lit20: // 0x44
886 case DW_OP_lit21: // 0x45
887 case DW_OP_lit22: // 0x46
888 case DW_OP_lit23: // 0x47
889 case DW_OP_lit24: // 0x48
890 case DW_OP_lit25: // 0x49
891 case DW_OP_lit26: // 0x4A
892 case DW_OP_lit27: // 0x4B
893 case DW_OP_lit28: // 0x4C
894 case DW_OP_lit29: // 0x4D
895 case DW_OP_lit30: // 0x4E
896 case DW_OP_lit31: // 0x4f
897 case DW_OP_reg0: // 0x50
898 case DW_OP_reg1: // 0x51
899 case DW_OP_reg2: // 0x52
900 case DW_OP_reg3: // 0x53
901 case DW_OP_reg4: // 0x54
902 case DW_OP_reg5: // 0x55
903 case DW_OP_reg6: // 0x56
904 case DW_OP_reg7: // 0x57
905 case DW_OP_reg8: // 0x58
906 case DW_OP_reg9: // 0x59
907 case DW_OP_reg10: // 0x5A
908 case DW_OP_reg11: // 0x5B
909 case DW_OP_reg12: // 0x5C
910 case DW_OP_reg13: // 0x5D
911 case DW_OP_reg14: // 0x5E
912 case DW_OP_reg15: // 0x5F
913 case DW_OP_reg16: // 0x60
914 case DW_OP_reg17: // 0x61
915 case DW_OP_reg18: // 0x62
916 case DW_OP_reg19: // 0x63
917 case DW_OP_reg20: // 0x64
918 case DW_OP_reg21: // 0x65
919 case DW_OP_reg22: // 0x66
920 case DW_OP_reg23: // 0x67
921 case DW_OP_reg24: // 0x68
922 case DW_OP_reg25: // 0x69
923 case DW_OP_reg26: // 0x6A
924 case DW_OP_reg27: // 0x6B
925 case DW_OP_reg28: // 0x6C
926 case DW_OP_reg29: // 0x6D
927 case DW_OP_reg30: // 0x6E
928 case DW_OP_reg31: // 0x6F
929 case DW_OP_nop: // 0x96
930 case DW_OP_push_object_address: // 0x97 DWARF3
931 case DW_OP_form_tls_address: // 0x9b DWARF3
932 case DW_OP_call_frame_cfa: // 0x9c DWARF3
Greg Claytoneaeaf6f2011-12-01 04:06:15 +0000[diff] [blame]933 case DW_OP_stack_value: // 0x9f DWARF4
Richard Mitton0a558352013-10-17 21:14:00 +0000[diff] [blame]934 case DW_OP_GNU_push_tls_address: // 0xe0 GNU extension
935 return 0;
Greg Clayton2fc93ea2011-11-13 04:15:56 +0000[diff] [blame]936
937 // Opcodes with a single 1 byte arguments
938 case DW_OP_const1u: // 0x08 1 1-byte constant
939 case DW_OP_const1s: // 0x09 1 1-byte constant
940 case DW_OP_pick: // 0x15 1 1-byte stack index
941 case DW_OP_deref_size: // 0x94 1 1-byte size of data retrieved
942 case DW_OP_xderef_size: // 0x95 1 1-byte size of data retrieved
943 return 1;
944
945 // Opcodes with a single 2 byte arguments
946 case DW_OP_const2u: // 0x0a 1 2-byte constant
947 case DW_OP_const2s: // 0x0b 1 2-byte constant
948 case DW_OP_skip: // 0x2f 1 signed 2-byte constant
949 case DW_OP_bra: // 0x28 1 signed 2-byte constant
950 case DW_OP_call2: // 0x98 1 2-byte offset of DIE (DWARF3)
951 return 2;
952
953 // Opcodes with a single 4 byte arguments
954 case DW_OP_const4u: // 0x0c 1 4-byte constant
955 case DW_OP_const4s: // 0x0d 1 4-byte constant
956 case DW_OP_call4: // 0x99 1 4-byte offset of DIE (DWARF3)
957 return 4;
958
959 // Opcodes with a single 8 byte arguments
960 case DW_OP_const8u: // 0x0e 1 8-byte constant
961 case DW_OP_const8s: // 0x0f 1 8-byte constant
962 return 8;
963
964 // All opcodes that have a single ULEB (signed or unsigned) argument
965 case DW_OP_constu: // 0x10 1 ULEB128 constant
966 case DW_OP_consts: // 0x11 1 SLEB128 constant
967 case DW_OP_plus_uconst: // 0x23 1 ULEB128 addend
968 case DW_OP_breg0: // 0x70 1 ULEB128 register
969 case DW_OP_breg1: // 0x71 1 ULEB128 register
970 case DW_OP_breg2: // 0x72 1 ULEB128 register
971 case DW_OP_breg3: // 0x73 1 ULEB128 register
972 case DW_OP_breg4: // 0x74 1 ULEB128 register
973 case DW_OP_breg5: // 0x75 1 ULEB128 register
974 case DW_OP_breg6: // 0x76 1 ULEB128 register
975 case DW_OP_breg7: // 0x77 1 ULEB128 register
976 case DW_OP_breg8: // 0x78 1 ULEB128 register
977 case DW_OP_breg9: // 0x79 1 ULEB128 register
978 case DW_OP_breg10: // 0x7a 1 ULEB128 register
979 case DW_OP_breg11: // 0x7b 1 ULEB128 register
980 case DW_OP_breg12: // 0x7c 1 ULEB128 register
981 case DW_OP_breg13: // 0x7d 1 ULEB128 register
982 case DW_OP_breg14: // 0x7e 1 ULEB128 register
983 case DW_OP_breg15: // 0x7f 1 ULEB128 register
984 case DW_OP_breg16: // 0x80 1 ULEB128 register
985 case DW_OP_breg17: // 0x81 1 ULEB128 register
986 case DW_OP_breg18: // 0x82 1 ULEB128 register
987 case DW_OP_breg19: // 0x83 1 ULEB128 register
988 case DW_OP_breg20: // 0x84 1 ULEB128 register
989 case DW_OP_breg21: // 0x85 1 ULEB128 register
990 case DW_OP_breg22: // 0x86 1 ULEB128 register
991 case DW_OP_breg23: // 0x87 1 ULEB128 register
992 case DW_OP_breg24: // 0x88 1 ULEB128 register
993 case DW_OP_breg25: // 0x89 1 ULEB128 register
994 case DW_OP_breg26: // 0x8a 1 ULEB128 register
995 case DW_OP_breg27: // 0x8b 1 ULEB128 register
996 case DW_OP_breg28: // 0x8c 1 ULEB128 register
997 case DW_OP_breg29: // 0x8d 1 ULEB128 register
998 case DW_OP_breg30: // 0x8e 1 ULEB128 register
999 case DW_OP_breg31: // 0x8f 1 ULEB128 register
1000 case DW_OP_regx: // 0x90 1 ULEB128 register
1001 case DW_OP_fbreg: // 0x91 1 SLEB128 offset
1002 case DW_OP_piece: // 0x93 1 ULEB128 size of piece addressed
1003 data.Skip_LEB128(&offset);
1004 return offset - data_offset;
1005
Greg Claytoneaeaf6f2011-12-01 04:06:15 +0000[diff] [blame]1006 // All opcodes that have a 2 ULEB (signed or unsigned) arguments
Greg Clayton2fc93ea2011-11-13 04:15:56 +0000[diff] [blame]1007 case DW_OP_bregx: // 0x92 2 ULEB128 register followed by SLEB128 offset
1008 case DW_OP_bit_piece: // 0x9d ULEB128 bit size, ULEB128 bit offset (DWARF3);
1009 data.Skip_LEB128(&offset);
1010 data.Skip_LEB128(&offset);
1011 return offset - data_offset;
Greg Claytoneaeaf6f2011-12-01 04:06:15 +0000[diff] [blame]1012
1013 case DW_OP_implicit_value: // 0x9e ULEB128 size followed by block of that size (DWARF4)
1014 {
1015 uint64_t block_len = data.Skip_LEB128(&offset);
1016 offset += block_len;
1017 return offset - data_offset;
1018 }
1019
Greg Clayton2fc93ea2011-11-13 04:15:56 +0000[diff] [blame]1020 default:
Greg Clayton96c09682012-01-04 22:56:43 +0000[diff] [blame]1021 break;
Greg Clayton2fc93ea2011-11-13 04:15:56 +0000[diff] [blame]1022 }
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]1023 return LLDB_INVALID_OFFSET;
Greg Clayton2fc93ea2011-11-13 04:15:56 +0000[diff] [blame]1024}
1025
Greg Clayton9422dd62013-03-04 21:46:16 +0000[diff] [blame]1026lldb::addr_t
1027DWARFExpression::GetLocation_DW_OP_addr (uint32_t op_addr_idx, bool &error) const
Greg Clayton2fc93ea2011-11-13 04:15:56 +0000[diff] [blame]1028{
Greg Clayton96c09682012-01-04 22:56:43 +0000[diff] [blame]1029 error = false;
Greg Clayton2fc93ea2011-11-13 04:15:56 +0000[diff] [blame]1030 if (IsLocationList())
Greg Clayton9422dd62013-03-04 21:46:16 +0000[diff] [blame]1031 return LLDB_INVALID_ADDRESS;
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]1032 lldb::offset_t offset = 0;
Greg Clayton9422dd62013-03-04 21:46:16 +0000[diff] [blame]1033 uint32_t curr_op_addr_idx = 0;
Greg Clayton2fc93ea2011-11-13 04:15:56 +0000[diff] [blame]1034 while (m_data.ValidOffset(offset))
1035 {
1036 const uint8_t op = m_data.GetU8(&offset);
1037
1038 if (op == DW_OP_addr)
1039 {
Greg Clayton9422dd62013-03-04 21:46:16 +0000[diff] [blame]1040 const lldb::addr_t op_file_addr = m_data.GetAddress(&offset);
1041 if (curr_op_addr_idx == op_addr_idx)
1042 return op_file_addr;
1043 else
1044 ++curr_op_addr_idx;
Greg Clayton2fc93ea2011-11-13 04:15:56 +0000[diff] [blame]1045 }
1046 else
1047 {
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]1048 const offset_t op_arg_size = GetOpcodeDataSize (m_data, offset, op);
1049 if (op_arg_size == LLDB_INVALID_OFFSET)
Greg Clayton96c09682012-01-04 22:56:43 +0000[diff] [blame]1050 {
1051 error = true;
Greg Clayton2fc93ea2011-11-13 04:15:56 +0000[diff] [blame]1052 break;
Greg Clayton96c09682012-01-04 22:56:43 +0000[diff] [blame]1053 }
Greg Clayton2fc93ea2011-11-13 04:15:56 +0000[diff] [blame]1054 offset += op_arg_size;
1055 }
1056 }
Greg Clayton9422dd62013-03-04 21:46:16 +0000[diff] [blame]1057 return LLDB_INVALID_ADDRESS;
Greg Clayton2fc93ea2011-11-13 04:15:56 +0000[diff] [blame]1058}
1059
1060bool
1061DWARFExpression::Update_DW_OP_addr (lldb::addr_t file_addr)
1062{
1063 if (IsLocationList())
1064 return false;
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]1065 lldb::offset_t offset = 0;
Greg Clayton2fc93ea2011-11-13 04:15:56 +0000[diff] [blame]1066 while (m_data.ValidOffset(offset))
1067 {
1068 const uint8_t op = m_data.GetU8(&offset);
1069
1070 if (op == DW_OP_addr)
1071 {
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]1072 const uint32_t addr_byte_size = m_data.GetAddressByteSize();
Greg Clayton2fc93ea2011-11-13 04:15:56 +0000[diff] [blame]1073 // We have to make a copy of the data as we don't know if this
1074 // data is from a read only memory mapped buffer, so we duplicate
1075 // all of the data first, then modify it, and if all goes well,
1076 // we then replace the data for this expression
1077
1078 // So first we copy the data into a heap buffer
Greg Clayton7b0992d2013-04-18 22:45:39 +0000[diff] [blame]1079 std::unique_ptr<DataBufferHeap> head_data_ap (new DataBufferHeap (m_data.GetDataStart(),
Greg Claytone01e07b2013-04-18 18:10:51 +0000[diff] [blame]1080 m_data.GetByteSize()));
Greg Clayton2fc93ea2011-11-13 04:15:56 +0000[diff] [blame]1081
1082 // Make en encoder so we can write the address into the buffer using
1083 // the correct byte order (endianness)
1084 DataEncoder encoder (head_data_ap->GetBytes(),
1085 head_data_ap->GetByteSize(),
1086 m_data.GetByteOrder(),
1087 addr_byte_size);
1088
1089 // Replace the address in the new buffer
1090 if (encoder.PutMaxU64 (offset, addr_byte_size, file_addr) == UINT32_MAX)
1091 return false;
1092
1093 // All went well, so now we can reset the data using a shared
1094 // pointer to the heap data so "m_data" will now correctly
1095 // manage the heap data.
1096 m_data.SetData (DataBufferSP (head_data_ap.release()));
1097 return true;
1098 }
1099 else
1100 {
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]1101 const offset_t op_arg_size = GetOpcodeDataSize (m_data, offset, op);
1102 if (op_arg_size == LLDB_INVALID_OFFSET)
Greg Clayton2fc93ea2011-11-13 04:15:56 +0000[diff] [blame]1103 break;
1104 offset += op_arg_size;
1105 }
1106 }
1107 return false;
1108}
1109
Greg Clayton9da7bd02010-08-24 21:05:24 +0000[diff] [blame]1110bool
Greg Clayton016a95e2010-09-14 02:20:48 +0000[diff] [blame]1111DWARFExpression::LocationListContainsAddress (lldb::addr_t loclist_base_addr, lldb::addr_t addr) const
Greg Clayton9da7bd02010-08-24 21:05:24 +0000[diff] [blame]1112{
Greg Clayton016a95e2010-09-14 02:20:48 +0000[diff] [blame]1113 if (addr == LLDB_INVALID_ADDRESS)
Greg Clayton9da7bd02010-08-24 21:05:24 +0000[diff] [blame]1114 return false;
1115
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1116 if (IsLocationList())
1117 {
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]1118 lldb::offset_t offset = 0;
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1119
Greg Clayton016a95e2010-09-14 02:20:48 +0000[diff] [blame]1120 if (loclist_base_addr == LLDB_INVALID_ADDRESS)
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1121 return false;
1122
1123 while (m_data.ValidOffset(offset))
1124 {
1125 // We need to figure out what the value is for the location.
1126 addr_t lo_pc = m_data.GetAddress(&offset);
1127 addr_t hi_pc = m_data.GetAddress(&offset);
1128 if (lo_pc == 0 && hi_pc == 0)
1129 break;
1130 else
1131 {
Greg Clayton016a95e2010-09-14 02:20:48 +0000[diff] [blame]1132 lo_pc += loclist_base_addr - m_loclist_slide;
1133 hi_pc += loclist_base_addr - m_loclist_slide;
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1134
Greg Clayton016a95e2010-09-14 02:20:48 +0000[diff] [blame]1135 if (lo_pc <= addr && addr < hi_pc)
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1136 return true;
1137
1138 offset += m_data.GetU16(&offset);
1139 }
1140 }
1141 }
1142 return false;
1143}
Greg Clayton9da7bd02010-08-24 21:05:24 +0000[diff] [blame]1144
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1145bool
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]1146DWARFExpression::GetLocation (addr_t base_addr, addr_t pc, lldb::offset_t &offset, lldb::offset_t &length)
Greg Claytonc749eb82011-07-11 05:12:02 +0000[diff] [blame]1147{
1148 offset = 0;
1149 if (!IsLocationList())
1150 {
1151 length = m_data.GetByteSize();
1152 return true;
1153 }
1154
1155 if (base_addr != LLDB_INVALID_ADDRESS && pc != LLDB_INVALID_ADDRESS)
1156 {
1157 addr_t curr_base_addr = base_addr;
1158
1159 while (m_data.ValidOffset(offset))
1160 {
1161 // We need to figure out what the value is for the location.
1162 addr_t lo_pc = m_data.GetAddress(&offset);
1163 addr_t hi_pc = m_data.GetAddress(&offset);
1164 if (lo_pc == 0 && hi_pc == 0)
1165 {
1166 break;
1167 }
1168 else
1169 {
1170 lo_pc += curr_base_addr - m_loclist_slide;
1171 hi_pc += curr_base_addr - m_loclist_slide;
1172
1173 length = m_data.GetU16(&offset);
1174
1175 if (length > 0 && lo_pc <= pc && pc < hi_pc)
1176 return true;
1177
1178 offset += length;
1179 }
1180 }
1181 }
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]1182 offset = LLDB_INVALID_OFFSET;
Greg Claytonc749eb82011-07-11 05:12:02 +0000[diff] [blame]1183 length = 0;
1184 return false;
1185}
1186
1187bool
1188DWARFExpression::DumpLocationForAddress (Stream *s,
1189 lldb::DescriptionLevel level,
1190 addr_t base_addr,
Greg Claytonafacd142011-09-02 01:15:17 +0000[diff] [blame]1191 addr_t address,
1192 ABI *abi)
Greg Claytonc749eb82011-07-11 05:12:02 +0000[diff] [blame]1193{
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]1194 lldb::offset_t offset = 0;
1195 lldb::offset_t length = 0;
Greg Claytonc749eb82011-07-11 05:12:02 +0000[diff] [blame]1196
1197 if (GetLocation (base_addr, address, offset, length))
1198 {
1199 if (length > 0)
1200 {
Greg Claytonafacd142011-09-02 01:15:17 +0000[diff] [blame]1201 DumpLocation(s, offset, length, level, abi);
Greg Claytonc749eb82011-07-11 05:12:02 +0000[diff] [blame]1202 return true;
1203 }
1204 }
1205 return false;
1206}
1207
1208bool
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1209DWARFExpression::Evaluate
1210(
1211 ExecutionContextScope *exe_scope,
Greg Clayton1a65ae12011-01-25 23:55:37 +0000[diff] [blame]1212 ClangExpressionVariableList *expr_locals,
1213 ClangExpressionDeclMap *decl_map,
Greg Clayton016a95e2010-09-14 02:20:48 +0000[diff] [blame]1214 lldb::addr_t loclist_base_load_addr,
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1215 const Value* initial_value_ptr,
1216 Value& result,
1217 Error *error_ptr
1218) const
1219{
1220 ExecutionContext exe_ctx (exe_scope);
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]1221 return Evaluate(&exe_ctx, expr_locals, decl_map, NULL, loclist_base_load_addr, initial_value_ptr, result, error_ptr);
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1222}
1223
1224bool
1225DWARFExpression::Evaluate
1226(
1227 ExecutionContext *exe_ctx,
Greg Clayton1a65ae12011-01-25 23:55:37 +0000[diff] [blame]1228 ClangExpressionVariableList *expr_locals,
1229 ClangExpressionDeclMap *decl_map,
Jason Molenda2d107dd2010-11-20 01:28:30 +0000[diff] [blame]1230 RegisterContext *reg_ctx,
Greg Clayton016a95e2010-09-14 02:20:48 +0000[diff] [blame]1231 lldb::addr_t loclist_base_load_addr,
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1232 const Value* initial_value_ptr,
1233 Value& result,
1234 Error *error_ptr
1235) const
1236{
Richard Mitton0a558352013-10-17 21:14:00 +0000[diff] [blame]1237 ModuleSP module_sp = m_module_wp.lock();
1238
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1239 if (IsLocationList())
1240 {
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]1241 lldb::offset_t offset = 0;
Jason Molenda2d107dd2010-11-20 01:28:30 +0000[diff] [blame]1242 addr_t pc;
Greg Claytonc14ee322011-09-22 04:58:26 +0000[diff] [blame]1243 StackFrame *frame = NULL;
Jason Molenda2d107dd2010-11-20 01:28:30 +0000[diff] [blame]1244 if (reg_ctx)
1245 pc = reg_ctx->GetPC();
1246 else
Greg Claytonc14ee322011-09-22 04:58:26 +0000[diff] [blame]1247 {
1248 frame = exe_ctx->GetFramePtr();
Sean Callananb7de9602012-03-10 03:03:46 +0000[diff] [blame]1249 if (!frame)
1250 return false;
1251 RegisterContextSP reg_ctx_sp = frame->GetRegisterContext();
1252 if (!reg_ctx_sp)
1253 return false;
1254 pc = reg_ctx_sp->GetPC();
Greg Claytonc14ee322011-09-22 04:58:26 +0000[diff] [blame]1255 }
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1256
Greg Clayton016a95e2010-09-14 02:20:48 +0000[diff] [blame]1257 if (loclist_base_load_addr != LLDB_INVALID_ADDRESS)
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1258 {
Greg Clayton016a95e2010-09-14 02:20:48 +0000[diff] [blame]1259 if (pc == LLDB_INVALID_ADDRESS)
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1260 {
Greg Clayton016a95e2010-09-14 02:20:48 +0000[diff] [blame]1261 if (error_ptr)
1262 error_ptr->SetErrorString("Invalid PC in frame.");
1263 return false;
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1264 }
Greg Clayton016a95e2010-09-14 02:20:48 +0000[diff] [blame]1265
1266 addr_t curr_loclist_base_load_addr = loclist_base_load_addr;
1267
1268 while (m_data.ValidOffset(offset))
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1269 {
Greg Clayton016a95e2010-09-14 02:20:48 +0000[diff] [blame]1270 // We need to figure out what the value is for the location.
1271 addr_t lo_pc = m_data.GetAddress(&offset);
1272 addr_t hi_pc = m_data.GetAddress(&offset);
1273 if (lo_pc == 0 && hi_pc == 0)
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1274 {
Greg Clayton016a95e2010-09-14 02:20:48 +0000[diff] [blame]1275 break;
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1276 }
Greg Clayton016a95e2010-09-14 02:20:48 +0000[diff] [blame]1277 else
1278 {
1279 lo_pc += curr_loclist_base_load_addr - m_loclist_slide;
1280 hi_pc += curr_loclist_base_load_addr - m_loclist_slide;
1281
1282 uint16_t length = m_data.GetU16(&offset);
1283
1284 if (length > 0 && lo_pc <= pc && pc < hi_pc)
1285 {
Richard Mitton0a558352013-10-17 21:14:00 +0000[diff] [blame]1286 return DWARFExpression::Evaluate (exe_ctx, expr_locals, decl_map, reg_ctx, module_sp, m_data, offset, length, m_reg_kind, initial_value_ptr, result, error_ptr);
Greg Clayton016a95e2010-09-14 02:20:48 +0000[diff] [blame]1287 }
1288 offset += length;
1289 }
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1290 }
1291 }
1292 if (error_ptr)
Greg Clayton007d5be2011-05-30 00:49:24 +0000[diff] [blame]1293 error_ptr->SetErrorString ("variable not available");
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1294 return false;
1295 }
1296
1297 // Not a location list, just a single expression.
Richard Mitton0a558352013-10-17 21:14:00 +0000[diff] [blame]1298 return DWARFExpression::Evaluate (exe_ctx, expr_locals, decl_map, reg_ctx, module_sp, m_data, 0, m_data.GetByteSize(), m_reg_kind, initial_value_ptr, result, error_ptr);
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1299}
1300
1301
1302
1303bool
1304DWARFExpression::Evaluate
1305(
1306 ExecutionContext *exe_ctx,
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1307 ClangExpressionVariableList *expr_locals,
1308 ClangExpressionDeclMap *decl_map,
Jason Molenda2d107dd2010-11-20 01:28:30 +0000[diff] [blame]1309 RegisterContext *reg_ctx,
Richard Mitton0a558352013-10-17 21:14:00 +0000[diff] [blame]1310 lldb::ModuleSP opcode_ctx,
Greg Clayton1a65ae12011-01-25 23:55:37 +0000[diff] [blame]1311 const DataExtractor& opcodes,
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]1312 const lldb::offset_t opcodes_offset,
1313 const lldb::offset_t opcodes_length,
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1314 const uint32_t reg_kind,
1315 const Value* initial_value_ptr,
1316 Value& result,
1317 Error *error_ptr
1318)
1319{
Greg Clayton9e9f2192013-05-17 00:55:28 +0000[diff] [blame]1320
1321 if (opcodes_length == 0)
1322 {
1323 if (error_ptr)
1324 error_ptr->SetErrorString ("no location, value may have been optimized out");
1325 return false;
1326 }
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1327 std::vector<Value> stack;
1328
Greg Claytonc14ee322011-09-22 04:58:26 +0000[diff] [blame]1329 Process *process = NULL;
1330 StackFrame *frame = NULL;
1331
1332 if (exe_ctx)
1333 {
1334 process = exe_ctx->GetProcessPtr();
1335 frame = exe_ctx->GetFramePtr();
1336 }
1337 if (reg_ctx == NULL && frame)
1338 reg_ctx = frame->GetRegisterContext().get();
Jason Molenda2d107dd2010-11-20 01:28:30 +0000[diff] [blame]1339
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1340 if (initial_value_ptr)
1341 stack.push_back(*initial_value_ptr);
1342
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]1343 lldb::offset_t offset = opcodes_offset;
1344 const lldb::offset_t end_offset = opcodes_offset + opcodes_length;
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1345 Value tmp;
1346 uint32_t reg_num;
1347
1348 // Make sure all of the data is available in opcodes.
1349 if (!opcodes.ValidOffsetForDataOfSize(opcodes_offset, opcodes_length))
1350 {
1351 if (error_ptr)
Greg Clayton9e9f2192013-05-17 00:55:28 +0000[diff] [blame]1352 error_ptr->SetErrorString ("invalid offset and/or length for opcodes buffer.");
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1353 return false;
1354 }
Greg Clayton5160ce52013-03-27 23:08:40 +0000[diff] [blame]1355 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1356
1357
1358 while (opcodes.ValidOffset(offset) && offset < end_offset)
1359 {
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]1360 const lldb::offset_t op_offset = offset;
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1361 const uint8_t op = opcodes.GetU8(&offset);
1362
Sean Callanan7dd98122011-10-14 20:34:21 +0000[diff] [blame]1363 if (log && log->GetVerbose())
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1364 {
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1365 size_t count = stack.size();
Sylvestre Ledru779f9212013-10-31 23:55:19 +0000[diff] [blame]1366 log->Printf("Stack before operation has %zu values:", count);
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1367 for (size_t i=0; i<count; ++i)
1368 {
1369 StreamString new_value;
Daniel Malead01b2952012-11-29 21:49:15 +0000[diff] [blame]1370 new_value.Printf("[%" PRIu64 "]", (uint64_t)i);
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1371 stack[i].Dump(&new_value);
Sean Callananf06ba8d2010-06-23 00:47:48 +0000[diff] [blame]1372 log->Printf(" %s", new_value.GetData());
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1373 }
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]1374 log->Printf("0x%8.8" PRIx64 ": %s", op_offset, DW_OP_value_to_name(op));
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1375 }
1376 switch (op)
1377 {
1378 //----------------------------------------------------------------------
1379 // The DW_OP_addr operation has a single operand that encodes a machine
1380 // address and whose size is the size of an address on the target machine.
1381 //----------------------------------------------------------------------
1382 case DW_OP_addr:
Greg Clayton644247c2011-07-07 01:59:51 +0000[diff] [blame]1383 stack.push_back(Scalar(opcodes.GetAddress(&offset)));
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1384 stack.back().SetValueType (Value::eValueTypeFileAddress);
1385 break;
1386
1387 //----------------------------------------------------------------------
1388 // The DW_OP_addr_sect_offset4 is used for any location expressions in
1389 // shared libraries that have a location like:
1390 // DW_OP_addr(0x1000)
1391 // If this address resides in a shared library, then this virtual
1392 // address won't make sense when it is evaluated in the context of a
1393 // running process where shared libraries have been slid. To account for
1394 // this, this new address type where we can store the section pointer
1395 // and a 4 byte offset.
1396 //----------------------------------------------------------------------
1397// case DW_OP_addr_sect_offset4:
1398// {
1399// result_type = eResultTypeFileAddress;
1400// lldb::Section *sect = (lldb::Section *)opcodes.GetMaxU64(&offset, sizeof(void *));
1401// lldb::addr_t sect_offset = opcodes.GetU32(&offset);
1402//
1403// Address so_addr (sect, sect_offset);
1404// lldb::addr_t load_addr = so_addr.GetLoadAddress();
1405// if (load_addr != LLDB_INVALID_ADDRESS)
1406// {
1407// // We successfully resolve a file address to a load
1408// // address.
1409// stack.push_back(load_addr);
1410// break;
1411// }
1412// else
1413// {
1414// // We were able
1415// if (error_ptr)
1416// error_ptr->SetErrorStringWithFormat ("Section %s in %s is not currently loaded.\n", sect->GetName().AsCString(), sect->GetModule()->GetFileSpec().GetFilename().AsCString());
1417// return false;
1418// }
1419// }
1420// break;
1421
1422 //----------------------------------------------------------------------
1423 // OPCODE: DW_OP_deref
1424 // OPERANDS: none
1425 // DESCRIPTION: Pops the top stack entry and treats it as an address.
1426 // The value retrieved from that address is pushed. The size of the
1427 // data retrieved from the dereferenced address is the size of an
1428 // address on the target machine.
1429 //----------------------------------------------------------------------
1430 case DW_OP_deref:
1431 {
1432 Value::ValueType value_type = stack.back().GetValueType();
1433 switch (value_type)
1434 {
1435 case Value::eValueTypeHostAddress:
1436 {
1437 void *src = (void *)stack.back().GetScalar().ULongLong();
1438 intptr_t ptr;
1439 ::memcpy (&ptr, src, sizeof(void *));
1440 stack.back().GetScalar() = ptr;
1441 stack.back().ClearContext();
1442 }
1443 break;
1444 case Value::eValueTypeLoadAddress:
1445 if (exe_ctx)
1446 {
Greg Claytonc14ee322011-09-22 04:58:26 +0000[diff] [blame]1447 if (process)
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1448 {
1449 lldb::addr_t pointer_addr = stack.back().GetScalar().ULongLong(LLDB_INVALID_ADDRESS);
1450 uint8_t addr_bytes[sizeof(lldb::addr_t)];
Greg Claytonc14ee322011-09-22 04:58:26 +0000[diff] [blame]1451 uint32_t addr_size = process->GetAddressByteSize();
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1452 Error error;
Greg Claytonc14ee322011-09-22 04:58:26 +0000[diff] [blame]1453 if (process->ReadMemory(pointer_addr, &addr_bytes, addr_size, error) == addr_size)
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1454 {
Greg Claytonc14ee322011-09-22 04:58:26 +0000[diff] [blame]1455 DataExtractor addr_data(addr_bytes, sizeof(addr_bytes), process->GetByteOrder(), addr_size);
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]1456 lldb::offset_t addr_data_offset = 0;
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1457 stack.back().GetScalar() = addr_data.GetPointer(&addr_data_offset);
1458 stack.back().ClearContext();
1459 }
1460 else
1461 {
1462 if (error_ptr)
Daniel Malead01b2952012-11-29 21:49:15 +0000[diff] [blame]1463 error_ptr->SetErrorStringWithFormat ("Failed to dereference pointer from 0x%" PRIx64 " for DW_OP_deref: %s\n",
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1464 pointer_addr,
1465 error.AsCString());
1466 return false;
1467 }
1468 }
1469 else
1470 {
1471 if (error_ptr)
1472 error_ptr->SetErrorStringWithFormat ("NULL process for DW_OP_deref.\n");
1473 return false;
1474 }
1475 }
1476 else
1477 {
1478 if (error_ptr)
1479 error_ptr->SetErrorStringWithFormat ("NULL execution context for DW_OP_deref.\n");
1480 return false;
1481 }
1482 break;
1483
1484 default:
1485 break;
1486 }
1487
1488 }
1489 break;
1490
1491 //----------------------------------------------------------------------
1492 // OPCODE: DW_OP_deref_size
1493 // OPERANDS: 1
1494 // 1 - uint8_t that specifies the size of the data to dereference.
1495 // DESCRIPTION: Behaves like the DW_OP_deref operation: it pops the top
1496 // stack entry and treats it as an address. The value retrieved from that
1497 // address is pushed. In the DW_OP_deref_size operation, however, the
1498 // size in bytes of the data retrieved from the dereferenced address is
1499 // specified by the single operand. This operand is a 1-byte unsigned
1500 // integral constant whose value may not be larger than the size of an
1501 // address on the target machine. The data retrieved is zero extended
1502 // to the size of an address on the target machine before being pushed
1503 // on the expression stack.
1504 //----------------------------------------------------------------------
1505 case DW_OP_deref_size:
Jason Molenda2d107dd2010-11-20 01:28:30 +0000[diff] [blame]1506 {
1507 uint8_t size = opcodes.GetU8(&offset);
1508 Value::ValueType value_type = stack.back().GetValueType();
1509 switch (value_type)
1510 {
1511 case Value::eValueTypeHostAddress:
1512 {
1513 void *src = (void *)stack.back().GetScalar().ULongLong();
1514 intptr_t ptr;
1515 ::memcpy (&ptr, src, sizeof(void *));
1516 // I can't decide whether the size operand should apply to the bytes in their
1517 // lldb-host endianness or the target endianness.. I doubt this'll ever come up
1518 // but I'll opt for assuming big endian regardless.
1519 switch (size)
1520 {
1521 case 1: ptr = ptr & 0xff; break;
1522 case 2: ptr = ptr & 0xffff; break;
1523 case 3: ptr = ptr & 0xffffff; break;
1524 case 4: ptr = ptr & 0xffffffff; break;
Jason Molendac1903402010-11-29 21:38:58 +0000[diff] [blame]1525 // the casts are added to work around the case where intptr_t is a 32 bit quantity;
1526 // presumably we won't hit the 5..7 cases if (void*) is 32-bits in this program.
1527 case 5: ptr = (intptr_t) ptr & 0xffffffffffULL; break;
1528 case 6: ptr = (intptr_t) ptr & 0xffffffffffffULL; break;
1529 case 7: ptr = (intptr_t) ptr & 0xffffffffffffffULL; break;
Jason Molenda2d107dd2010-11-20 01:28:30 +0000[diff] [blame]1530 default: break;
1531 }
1532 stack.back().GetScalar() = ptr;
1533 stack.back().ClearContext();
1534 }
1535 break;
1536 case Value::eValueTypeLoadAddress:
1537 if (exe_ctx)
1538 {
Greg Claytonc14ee322011-09-22 04:58:26 +0000[diff] [blame]1539 if (process)
Jason Molenda2d107dd2010-11-20 01:28:30 +0000[diff] [blame]1540 {
1541 lldb::addr_t pointer_addr = stack.back().GetScalar().ULongLong(LLDB_INVALID_ADDRESS);
1542 uint8_t addr_bytes[sizeof(lldb::addr_t)];
1543 Error error;
Greg Claytonc14ee322011-09-22 04:58:26 +0000[diff] [blame]1544 if (process->ReadMemory(pointer_addr, &addr_bytes, size, error) == size)
Jason Molenda2d107dd2010-11-20 01:28:30 +0000[diff] [blame]1545 {
Greg Claytonc14ee322011-09-22 04:58:26 +0000[diff] [blame]1546 DataExtractor addr_data(addr_bytes, sizeof(addr_bytes), process->GetByteOrder(), size);
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]1547 lldb::offset_t addr_data_offset = 0;
Jason Molenda2d107dd2010-11-20 01:28:30 +0000[diff] [blame]1548 switch (size)
1549 {
1550 case 1: stack.back().GetScalar() = addr_data.GetU8(&addr_data_offset); break;
1551 case 2: stack.back().GetScalar() = addr_data.GetU16(&addr_data_offset); break;
1552 case 4: stack.back().GetScalar() = addr_data.GetU32(&addr_data_offset); break;
1553 case 8: stack.back().GetScalar() = addr_data.GetU64(&addr_data_offset); break;
1554 default: stack.back().GetScalar() = addr_data.GetPointer(&addr_data_offset);
1555 }
1556 stack.back().ClearContext();
1557 }
1558 else
1559 {
1560 if (error_ptr)
Daniel Malead01b2952012-11-29 21:49:15 +0000[diff] [blame]1561 error_ptr->SetErrorStringWithFormat ("Failed to dereference pointer from 0x%" PRIx64 " for DW_OP_deref: %s\n",
Jason Molenda2d107dd2010-11-20 01:28:30 +0000[diff] [blame]1562 pointer_addr,
1563 error.AsCString());
1564 return false;
1565 }
1566 }
1567 else
1568 {
1569 if (error_ptr)
1570 error_ptr->SetErrorStringWithFormat ("NULL process for DW_OP_deref.\n");
1571 return false;
1572 }
1573 }
1574 else
1575 {
1576 if (error_ptr)
1577 error_ptr->SetErrorStringWithFormat ("NULL execution context for DW_OP_deref.\n");
1578 return false;
1579 }
1580 break;
1581
1582 default:
1583 break;
1584 }
1585
1586 }
1587 break;
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1588
1589 //----------------------------------------------------------------------
1590 // OPCODE: DW_OP_xderef_size
1591 // OPERANDS: 1
1592 // 1 - uint8_t that specifies the size of the data to dereference.
1593 // DESCRIPTION: Behaves like the DW_OP_xderef operation: the entry at
1594 // the top of the stack is treated as an address. The second stack
Greg Clayton1b72fcb2010-08-24 00:45:41 +0000[diff] [blame]1595 // entry is treated as an "address space identifier" for those
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1596 // architectures that support multiple address spaces. The top two
1597 // stack elements are popped, a data item is retrieved through an
1598 // implementation-defined address calculation and pushed as the new
1599 // stack top. In the DW_OP_xderef_size operation, however, the size in
1600 // bytes of the data retrieved from the dereferenced address is
1601 // specified by the single operand. This operand is a 1-byte unsigned
1602 // integral constant whose value may not be larger than the size of an
1603 // address on the target machine. The data retrieved is zero extended
1604 // to the size of an address on the target machine before being pushed
1605 // on the expression stack.
1606 //----------------------------------------------------------------------
1607 case DW_OP_xderef_size:
1608 if (error_ptr)
1609 error_ptr->SetErrorString("Unimplemented opcode: DW_OP_xderef_size.");
1610 return false;
1611 //----------------------------------------------------------------------
1612 // OPCODE: DW_OP_xderef
1613 // OPERANDS: none
1614 // DESCRIPTION: Provides an extended dereference mechanism. The entry at
1615 // the top of the stack is treated as an address. The second stack entry
1616 // is treated as an "address space identifier" for those architectures
1617 // that support multiple address spaces. The top two stack elements are
1618 // popped, a data item is retrieved through an implementation-defined
1619 // address calculation and pushed as the new stack top. The size of the
1620 // data retrieved from the dereferenced address is the size of an address
1621 // on the target machine.
1622 //----------------------------------------------------------------------
1623 case DW_OP_xderef:
1624 if (error_ptr)
1625 error_ptr->SetErrorString("Unimplemented opcode: DW_OP_xderef.");
1626 return false;
1627
1628 //----------------------------------------------------------------------
1629 // All DW_OP_constXXX opcodes have a single operand as noted below:
1630 //
1631 // Opcode Operand 1
1632 // --------------- ----------------------------------------------------
1633 // DW_OP_const1u 1-byte unsigned integer constant
1634 // DW_OP_const1s 1-byte signed integer constant
1635 // DW_OP_const2u 2-byte unsigned integer constant
1636 // DW_OP_const2s 2-byte signed integer constant
1637 // DW_OP_const4u 4-byte unsigned integer constant
1638 // DW_OP_const4s 4-byte signed integer constant
1639 // DW_OP_const8u 8-byte unsigned integer constant
1640 // DW_OP_const8s 8-byte signed integer constant
1641 // DW_OP_constu unsigned LEB128 integer constant
1642 // DW_OP_consts signed LEB128 integer constant
1643 //----------------------------------------------------------------------
Greg Clayton644247c2011-07-07 01:59:51 +0000[diff] [blame]1644 case DW_OP_const1u : stack.push_back(Scalar(( uint8_t)opcodes.GetU8 (&offset))); break;
1645 case DW_OP_const1s : stack.push_back(Scalar(( int8_t)opcodes.GetU8 (&offset))); break;
1646 case DW_OP_const2u : stack.push_back(Scalar((uint16_t)opcodes.GetU16 (&offset))); break;
1647 case DW_OP_const2s : stack.push_back(Scalar(( int16_t)opcodes.GetU16 (&offset))); break;
1648 case DW_OP_const4u : stack.push_back(Scalar((uint32_t)opcodes.GetU32 (&offset))); break;
1649 case DW_OP_const4s : stack.push_back(Scalar(( int32_t)opcodes.GetU32 (&offset))); break;
1650 case DW_OP_const8u : stack.push_back(Scalar((uint64_t)opcodes.GetU64 (&offset))); break;
1651 case DW_OP_const8s : stack.push_back(Scalar(( int64_t)opcodes.GetU64 (&offset))); break;
1652 case DW_OP_constu : stack.push_back(Scalar(opcodes.GetULEB128 (&offset))); break;
1653 case DW_OP_consts : stack.push_back(Scalar(opcodes.GetSLEB128 (&offset))); break;
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1654
1655 //----------------------------------------------------------------------
1656 // OPCODE: DW_OP_dup
1657 // OPERANDS: none
1658 // DESCRIPTION: duplicates the value at the top of the stack
1659 //----------------------------------------------------------------------
1660 case DW_OP_dup:
1661 if (stack.empty())
1662 {
1663 if (error_ptr)
1664 error_ptr->SetErrorString("Expression stack empty for DW_OP_dup.");
1665 return false;
1666 }
1667 else
1668 stack.push_back(stack.back());
1669 break;
1670
1671 //----------------------------------------------------------------------
1672 // OPCODE: DW_OP_drop
1673 // OPERANDS: none
1674 // DESCRIPTION: pops the value at the top of the stack
1675 //----------------------------------------------------------------------
1676 case DW_OP_drop:
1677 if (stack.empty())
1678 {
1679 if (error_ptr)
1680 error_ptr->SetErrorString("Expression stack empty for DW_OP_drop.");
1681 return false;
1682 }
1683 else
1684 stack.pop_back();
1685 break;
1686
1687 //----------------------------------------------------------------------
1688 // OPCODE: DW_OP_over
1689 // OPERANDS: none
1690 // DESCRIPTION: Duplicates the entry currently second in the stack at
1691 // the top of the stack.
1692 //----------------------------------------------------------------------
1693 case DW_OP_over:
1694 if (stack.size() < 2)
1695 {
1696 if (error_ptr)
1697 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_over.");
1698 return false;
1699 }
1700 else
1701 stack.push_back(stack[stack.size() - 2]);
1702 break;
1703
1704
1705 //----------------------------------------------------------------------
1706 // OPCODE: DW_OP_pick
1707 // OPERANDS: uint8_t index into the current stack
1708 // DESCRIPTION: The stack entry with the specified index (0 through 255,
1709 // inclusive) is pushed on the stack
1710 //----------------------------------------------------------------------
1711 case DW_OP_pick:
1712 {
1713 uint8_t pick_idx = opcodes.GetU8(&offset);
1714 if (pick_idx < stack.size())
1715 stack.push_back(stack[pick_idx]);
1716 else
1717 {
1718 if (error_ptr)
1719 error_ptr->SetErrorStringWithFormat("Index %u out of range for DW_OP_pick.\n", pick_idx);
1720 return false;
1721 }
1722 }
1723 break;
1724
1725 //----------------------------------------------------------------------
1726 // OPCODE: DW_OP_swap
1727 // OPERANDS: none
1728 // DESCRIPTION: swaps the top two stack entries. The entry at the top
1729 // of the stack becomes the second stack entry, and the second entry
1730 // becomes the top of the stack
1731 //----------------------------------------------------------------------
1732 case DW_OP_swap:
1733 if (stack.size() < 2)
1734 {
1735 if (error_ptr)
1736 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_swap.");
1737 return false;
1738 }
1739 else
1740 {
1741 tmp = stack.back();
1742 stack.back() = stack[stack.size() - 2];
1743 stack[stack.size() - 2] = tmp;
1744 }
1745 break;
1746
1747 //----------------------------------------------------------------------
1748 // OPCODE: DW_OP_rot
1749 // OPERANDS: none
1750 // DESCRIPTION: Rotates the first three stack entries. The entry at
1751 // the top of the stack becomes the third stack entry, the second
1752 // entry becomes the top of the stack, and the third entry becomes
1753 // the second entry.
1754 //----------------------------------------------------------------------
1755 case DW_OP_rot:
1756 if (stack.size() < 3)
1757 {
1758 if (error_ptr)
1759 error_ptr->SetErrorString("Expression stack needs at least 3 items for DW_OP_rot.");
1760 return false;
1761 }
1762 else
1763 {
1764 size_t last_idx = stack.size() - 1;
1765 Value old_top = stack[last_idx];
1766 stack[last_idx] = stack[last_idx - 1];
1767 stack[last_idx - 1] = stack[last_idx - 2];
1768 stack[last_idx - 2] = old_top;
1769 }
1770 break;
1771
1772 //----------------------------------------------------------------------
1773 // OPCODE: DW_OP_abs
1774 // OPERANDS: none
1775 // DESCRIPTION: pops the top stack entry, interprets it as a signed
1776 // value and pushes its absolute value. If the absolute value can not be
1777 // represented, the result is undefined.
1778 //----------------------------------------------------------------------
1779 case DW_OP_abs:
1780 if (stack.empty())
1781 {
1782 if (error_ptr)
1783 error_ptr->SetErrorString("Expression stack needs at least 1 item for DW_OP_abs.");
1784 return false;
1785 }
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]1786 else if (stack.back().ResolveValue(exe_ctx).AbsoluteValue() == false)
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1787 {
1788 if (error_ptr)
1789 error_ptr->SetErrorString("Failed to take the absolute value of the first stack item.");
1790 return false;
1791 }
1792 break;
1793
1794 //----------------------------------------------------------------------
1795 // OPCODE: DW_OP_and
1796 // OPERANDS: none
1797 // DESCRIPTION: pops the top two stack values, performs a bitwise and
1798 // operation on the two, and pushes the result.
1799 //----------------------------------------------------------------------
1800 case DW_OP_and:
1801 if (stack.size() < 2)
1802 {
1803 if (error_ptr)
1804 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_and.");
1805 return false;
1806 }
1807 else
1808 {
1809 tmp = stack.back();
1810 stack.pop_back();
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]1811 stack.back().ResolveValue(exe_ctx) = stack.back().ResolveValue(exe_ctx) & tmp.ResolveValue(exe_ctx);
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1812 }
1813 break;
1814
1815 //----------------------------------------------------------------------
1816 // OPCODE: DW_OP_div
1817 // OPERANDS: none
1818 // DESCRIPTION: pops the top two stack values, divides the former second
1819 // entry by the former top of the stack using signed division, and
1820 // pushes the result.
1821 //----------------------------------------------------------------------
1822 case DW_OP_div:
1823 if (stack.size() < 2)
1824 {
1825 if (error_ptr)
1826 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_div.");
1827 return false;
1828 }
1829 else
1830 {
1831 tmp = stack.back();
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]1832 if (tmp.ResolveValue(exe_ctx).IsZero())
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1833 {
1834 if (error_ptr)
1835 error_ptr->SetErrorString("Divide by zero.");
1836 return false;
1837 }
1838 else
1839 {
1840 stack.pop_back();
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]1841 stack.back() = stack.back().ResolveValue(exe_ctx) / tmp.ResolveValue(exe_ctx);
1842 if (!stack.back().ResolveValue(exe_ctx).IsValid())
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1843 {
1844 if (error_ptr)
1845 error_ptr->SetErrorString("Divide failed.");
1846 return false;
1847 }
1848 }
1849 }
1850 break;
1851
1852 //----------------------------------------------------------------------
1853 // OPCODE: DW_OP_minus
1854 // OPERANDS: none
1855 // DESCRIPTION: pops the top two stack values, subtracts the former top
1856 // of the stack from the former second entry, and pushes the result.
1857 //----------------------------------------------------------------------
1858 case DW_OP_minus:
1859 if (stack.size() < 2)
1860 {
1861 if (error_ptr)
1862 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_minus.");
1863 return false;
1864 }
1865 else
1866 {
1867 tmp = stack.back();
1868 stack.pop_back();
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]1869 stack.back().ResolveValue(exe_ctx) = stack.back().ResolveValue(exe_ctx) - tmp.ResolveValue(exe_ctx);
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1870 }
1871 break;
1872
1873 //----------------------------------------------------------------------
1874 // OPCODE: DW_OP_mod
1875 // OPERANDS: none
1876 // DESCRIPTION: pops the top two stack values and pushes the result of
1877 // the calculation: former second stack entry modulo the former top of
1878 // the stack.
1879 //----------------------------------------------------------------------
1880 case DW_OP_mod:
1881 if (stack.size() < 2)
1882 {
1883 if (error_ptr)
1884 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_mod.");
1885 return false;
1886 }
1887 else
1888 {
1889 tmp = stack.back();
1890 stack.pop_back();
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]1891 stack.back().ResolveValue(exe_ctx) = stack.back().ResolveValue(exe_ctx) % tmp.ResolveValue(exe_ctx);
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1892 }
1893 break;
1894
1895
1896 //----------------------------------------------------------------------
1897 // OPCODE: DW_OP_mul
1898 // OPERANDS: none
1899 // DESCRIPTION: pops the top two stack entries, multiplies them
1900 // together, and pushes the result.
1901 //----------------------------------------------------------------------
1902 case DW_OP_mul:
1903 if (stack.size() < 2)
1904 {
1905 if (error_ptr)
1906 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_mul.");
1907 return false;
1908 }
1909 else
1910 {
1911 tmp = stack.back();
1912 stack.pop_back();
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]1913 stack.back().ResolveValue(exe_ctx) = stack.back().ResolveValue(exe_ctx) * tmp.ResolveValue(exe_ctx);
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1914 }
1915 break;
1916
1917 //----------------------------------------------------------------------
1918 // OPCODE: DW_OP_neg
1919 // OPERANDS: none
1920 // DESCRIPTION: pops the top stack entry, and pushes its negation.
1921 //----------------------------------------------------------------------
1922 case DW_OP_neg:
1923 if (stack.empty())
1924 {
1925 if (error_ptr)
1926 error_ptr->SetErrorString("Expression stack needs at least 1 item for DW_OP_neg.");
1927 return false;
1928 }
1929 else
1930 {
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]1931 if (stack.back().ResolveValue(exe_ctx).UnaryNegate() == false)
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1932 {
1933 if (error_ptr)
1934 error_ptr->SetErrorString("Unary negate failed.");
1935 return false;
1936 }
1937 }
1938 break;
1939
1940 //----------------------------------------------------------------------
1941 // OPCODE: DW_OP_not
1942 // OPERANDS: none
1943 // DESCRIPTION: pops the top stack entry, and pushes its bitwise
1944 // complement
1945 //----------------------------------------------------------------------
1946 case DW_OP_not:
1947 if (stack.empty())
1948 {
1949 if (error_ptr)
1950 error_ptr->SetErrorString("Expression stack needs at least 1 item for DW_OP_not.");
1951 return false;
1952 }
1953 else
1954 {
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]1955 if (stack.back().ResolveValue(exe_ctx).OnesComplement() == false)
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1956 {
1957 if (error_ptr)
1958 error_ptr->SetErrorString("Logical NOT failed.");
1959 return false;
1960 }
1961 }
1962 break;
1963
1964 //----------------------------------------------------------------------
1965 // OPCODE: DW_OP_or
1966 // OPERANDS: none
1967 // DESCRIPTION: pops the top two stack entries, performs a bitwise or
1968 // operation on the two, and pushes the result.
1969 //----------------------------------------------------------------------
1970 case DW_OP_or:
1971 if (stack.size() < 2)
1972 {
1973 if (error_ptr)
1974 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_or.");
1975 return false;
1976 }
1977 else
1978 {
1979 tmp = stack.back();
1980 stack.pop_back();
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]1981 stack.back().ResolveValue(exe_ctx) = stack.back().ResolveValue(exe_ctx) | tmp.ResolveValue(exe_ctx);
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]1982 }
1983 break;
1984
1985 //----------------------------------------------------------------------
1986 // OPCODE: DW_OP_plus
1987 // OPERANDS: none
1988 // DESCRIPTION: pops the top two stack entries, adds them together, and
1989 // pushes the result.
1990 //----------------------------------------------------------------------
1991 case DW_OP_plus:
1992 if (stack.size() < 2)
1993 {
1994 if (error_ptr)
1995 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_plus.");
1996 return false;
1997 }
1998 else
1999 {
2000 tmp = stack.back();
2001 stack.pop_back();
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]2002 stack.back().ResolveValue(exe_ctx) = stack.back().ResolveValue(exe_ctx) + tmp.ResolveValue(exe_ctx);
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2003 }
2004 break;
2005
2006 //----------------------------------------------------------------------
2007 // OPCODE: DW_OP_plus_uconst
2008 // OPERANDS: none
2009 // DESCRIPTION: pops the top stack entry, adds it to the unsigned LEB128
2010 // constant operand and pushes the result.
2011 //----------------------------------------------------------------------
2012 case DW_OP_plus_uconst:
2013 if (stack.empty())
2014 {
2015 if (error_ptr)
2016 error_ptr->SetErrorString("Expression stack needs at least 1 item for DW_OP_plus_uconst.");
2017 return false;
2018 }
2019 else
2020 {
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]2021 const uint64_t uconst_value = opcodes.GetULEB128(&offset);
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2022 // Implicit conversion from a UINT to a Scalar...
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]2023 stack.back().ResolveValue(exe_ctx) += uconst_value;
2024 if (!stack.back().ResolveValue(exe_ctx).IsValid())
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2025 {
2026 if (error_ptr)
2027 error_ptr->SetErrorString("DW_OP_plus_uconst failed.");
2028 return false;
2029 }
2030 }
2031 break;
2032
2033 //----------------------------------------------------------------------
2034 // OPCODE: DW_OP_shl
2035 // OPERANDS: none
2036 // DESCRIPTION: pops the top two stack entries, shifts the former
2037 // second entry left by the number of bits specified by the former top
2038 // of the stack, and pushes the result.
2039 //----------------------------------------------------------------------
2040 case DW_OP_shl:
2041 if (stack.size() < 2)
2042 {
2043 if (error_ptr)
2044 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_shl.");
2045 return false;
2046 }
2047 else
2048 {
2049 tmp = stack.back();
2050 stack.pop_back();
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]2051 stack.back().ResolveValue(exe_ctx) <<= tmp.ResolveValue(exe_ctx);
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2052 }
2053 break;
2054
2055 //----------------------------------------------------------------------
2056 // OPCODE: DW_OP_shr
2057 // OPERANDS: none
2058 // DESCRIPTION: pops the top two stack entries, shifts the former second
2059 // entry right logically (filling with zero bits) by the number of bits
2060 // specified by the former top of the stack, and pushes the result.
2061 //----------------------------------------------------------------------
2062 case DW_OP_shr:
2063 if (stack.size() < 2)
2064 {
2065 if (error_ptr)
2066 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_shr.");
2067 return false;
2068 }
2069 else
2070 {
2071 tmp = stack.back();
2072 stack.pop_back();
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]2073 if (stack.back().ResolveValue(exe_ctx).ShiftRightLogical(tmp.ResolveValue(exe_ctx)) == false)
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2074 {
2075 if (error_ptr)
2076 error_ptr->SetErrorString("DW_OP_shr failed.");
2077 return false;
2078 }
2079 }
2080 break;
2081
2082 //----------------------------------------------------------------------
2083 // OPCODE: DW_OP_shra
2084 // OPERANDS: none
2085 // DESCRIPTION: pops the top two stack entries, shifts the former second
2086 // entry right arithmetically (divide the magnitude by 2, keep the same
2087 // sign for the result) by the number of bits specified by the former
2088 // top of the stack, and pushes the result.
2089 //----------------------------------------------------------------------
2090 case DW_OP_shra:
2091 if (stack.size() < 2)
2092 {
2093 if (error_ptr)
2094 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_shra.");
2095 return false;
2096 }
2097 else
2098 {
2099 tmp = stack.back();
2100 stack.pop_back();
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]2101 stack.back().ResolveValue(exe_ctx) >>= tmp.ResolveValue(exe_ctx);
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2102 }
2103 break;
2104
2105 //----------------------------------------------------------------------
2106 // OPCODE: DW_OP_xor
2107 // OPERANDS: none
2108 // DESCRIPTION: pops the top two stack entries, performs the bitwise
2109 // exclusive-or operation on the two, and pushes the result.
2110 //----------------------------------------------------------------------
2111 case DW_OP_xor:
2112 if (stack.size() < 2)
2113 {
2114 if (error_ptr)
2115 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_xor.");
2116 return false;
2117 }
2118 else
2119 {
2120 tmp = stack.back();
2121 stack.pop_back();
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]2122 stack.back().ResolveValue(exe_ctx) = stack.back().ResolveValue(exe_ctx) ^ tmp.ResolveValue(exe_ctx);
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2123 }
2124 break;
2125
2126
2127 //----------------------------------------------------------------------
2128 // OPCODE: DW_OP_skip
2129 // OPERANDS: int16_t
2130 // DESCRIPTION: An unconditional branch. Its single operand is a 2-byte
2131 // signed integer constant. The 2-byte constant is the number of bytes
2132 // of the DWARF expression to skip forward or backward from the current
2133 // operation, beginning after the 2-byte constant.
2134 //----------------------------------------------------------------------
2135 case DW_OP_skip:
2136 {
2137 int16_t skip_offset = (int16_t)opcodes.GetU16(&offset);
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]2138 lldb::offset_t new_offset = offset + skip_offset;
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2139 if (new_offset >= opcodes_offset && new_offset < end_offset)
2140 offset = new_offset;
2141 else
2142 {
2143 if (error_ptr)
2144 error_ptr->SetErrorString("Invalid opcode offset in DW_OP_skip.");
2145 return false;
2146 }
2147 }
2148 break;
2149
2150 //----------------------------------------------------------------------
2151 // OPCODE: DW_OP_bra
2152 // OPERANDS: int16_t
2153 // DESCRIPTION: A conditional branch. Its single operand is a 2-byte
2154 // signed integer constant. This operation pops the top of stack. If
2155 // the value popped is not the constant 0, the 2-byte constant operand
2156 // is the number of bytes of the DWARF expression to skip forward or
2157 // backward from the current operation, beginning after the 2-byte
2158 // constant.
2159 //----------------------------------------------------------------------
2160 case DW_OP_bra:
2161 {
2162 tmp = stack.back();
2163 stack.pop_back();
2164 int16_t bra_offset = (int16_t)opcodes.GetU16(&offset);
2165 Scalar zero(0);
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]2166 if (tmp.ResolveValue(exe_ctx) != zero)
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2167 {
Greg Claytonc7bece562013-01-25 18:06:21 +0000[diff] [blame]2168 lldb::offset_t new_offset = offset + bra_offset;
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2169 if (new_offset >= opcodes_offset && new_offset < end_offset)
2170 offset = new_offset;
2171 else
2172 {
2173 if (error_ptr)
2174 error_ptr->SetErrorString("Invalid opcode offset in DW_OP_bra.");
2175 return false;
2176 }
2177 }
2178 }
2179 break;
2180
2181 //----------------------------------------------------------------------
2182 // OPCODE: DW_OP_eq
2183 // OPERANDS: none
2184 // DESCRIPTION: pops the top two stack values, compares using the
2185 // equals (==) operator.
2186 // STACK RESULT: push the constant value 1 onto the stack if the result
2187 // of the operation is true or the constant value 0 if the result of the
2188 // operation is false.
2189 //----------------------------------------------------------------------
2190 case DW_OP_eq:
2191 if (stack.size() < 2)
2192 {
2193 if (error_ptr)
2194 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_eq.");
2195 return false;
2196 }
2197 else
2198 {
2199 tmp = stack.back();
2200 stack.pop_back();
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]2201 stack.back().ResolveValue(exe_ctx) = stack.back().ResolveValue(exe_ctx) == tmp.ResolveValue(exe_ctx);
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2202 }
2203 break;
2204
2205 //----------------------------------------------------------------------
2206 // OPCODE: DW_OP_ge
2207 // OPERANDS: none
2208 // DESCRIPTION: pops the top two stack values, compares using the
2209 // greater than or equal to (>=) operator.
2210 // STACK RESULT: push the constant value 1 onto the stack if the result
2211 // of the operation is true or the constant value 0 if the result of the
2212 // operation is false.
2213 //----------------------------------------------------------------------
2214 case DW_OP_ge:
2215 if (stack.size() < 2)
2216 {
2217 if (error_ptr)
2218 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_ge.");
2219 return false;
2220 }
2221 else
2222 {
2223 tmp = stack.back();
2224 stack.pop_back();
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]2225 stack.back().ResolveValue(exe_ctx) = stack.back().ResolveValue(exe_ctx) >= tmp.ResolveValue(exe_ctx);
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2226 }
2227 break;
2228
2229 //----------------------------------------------------------------------
2230 // OPCODE: DW_OP_gt
2231 // OPERANDS: none
2232 // DESCRIPTION: pops the top two stack values, compares using the
2233 // greater than (>) operator.
2234 // STACK RESULT: push the constant value 1 onto the stack if the result
2235 // of the operation is true or the constant value 0 if the result of the
2236 // operation is false.
2237 //----------------------------------------------------------------------
2238 case DW_OP_gt:
2239 if (stack.size() < 2)
2240 {
2241 if (error_ptr)
2242 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_gt.");
2243 return false;
2244 }
2245 else
2246 {
2247 tmp = stack.back();
2248 stack.pop_back();
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]2249 stack.back().ResolveValue(exe_ctx) = stack.back().ResolveValue(exe_ctx) > tmp.ResolveValue(exe_ctx);
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2250 }
2251 break;
2252
2253 //----------------------------------------------------------------------
2254 // OPCODE: DW_OP_le
2255 // OPERANDS: none
2256 // DESCRIPTION: pops the top two stack values, compares using the
2257 // less than or equal to (<=) operator.
2258 // STACK RESULT: push the constant value 1 onto the stack if the result
2259 // of the operation is true or the constant value 0 if the result of the
2260 // operation is false.
2261 //----------------------------------------------------------------------
2262 case DW_OP_le:
2263 if (stack.size() < 2)
2264 {
2265 if (error_ptr)
2266 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_le.");
2267 return false;
2268 }
2269 else
2270 {
2271 tmp = stack.back();
2272 stack.pop_back();
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]2273 stack.back().ResolveValue(exe_ctx) = stack.back().ResolveValue(exe_ctx) <= tmp.ResolveValue(exe_ctx);
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2274 }
2275 break;
2276
2277 //----------------------------------------------------------------------
2278 // OPCODE: DW_OP_lt
2279 // OPERANDS: none
2280 // DESCRIPTION: pops the top two stack values, compares using the
2281 // less than (<) operator.
2282 // STACK RESULT: push the constant value 1 onto the stack if the result
2283 // of the operation is true or the constant value 0 if the result of the
2284 // operation is false.
2285 //----------------------------------------------------------------------
2286 case DW_OP_lt:
2287 if (stack.size() < 2)
2288 {
2289 if (error_ptr)
2290 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_lt.");
2291 return false;
2292 }
2293 else
2294 {
2295 tmp = stack.back();
2296 stack.pop_back();
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]2297 stack.back().ResolveValue(exe_ctx) = stack.back().ResolveValue(exe_ctx) < tmp.ResolveValue(exe_ctx);
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2298 }
2299 break;
2300
2301 //----------------------------------------------------------------------
2302 // OPCODE: DW_OP_ne
2303 // OPERANDS: none
2304 // DESCRIPTION: pops the top two stack values, compares using the
2305 // not equal (!=) operator.
2306 // STACK RESULT: push the constant value 1 onto the stack if the result
2307 // of the operation is true or the constant value 0 if the result of the
2308 // operation is false.
2309 //----------------------------------------------------------------------
2310 case DW_OP_ne:
2311 if (stack.size() < 2)
2312 {
2313 if (error_ptr)
2314 error_ptr->SetErrorString("Expression stack needs at least 2 items for DW_OP_ne.");
2315 return false;
2316 }
2317 else
2318 {
2319 tmp = stack.back();
2320 stack.pop_back();
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]2321 stack.back().ResolveValue(exe_ctx) = stack.back().ResolveValue(exe_ctx) != tmp.ResolveValue(exe_ctx);
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2322 }
2323 break;
2324
2325 //----------------------------------------------------------------------
2326 // OPCODE: DW_OP_litn
2327 // OPERANDS: none
2328 // DESCRIPTION: encode the unsigned literal values from 0 through 31.
2329 // STACK RESULT: push the unsigned literal constant value onto the top
2330 // of the stack.
2331 //----------------------------------------------------------------------
2332 case DW_OP_lit0:
2333 case DW_OP_lit1:
2334 case DW_OP_lit2:
2335 case DW_OP_lit3:
2336 case DW_OP_lit4:
2337 case DW_OP_lit5:
2338 case DW_OP_lit6:
2339 case DW_OP_lit7:
2340 case DW_OP_lit8:
2341 case DW_OP_lit9:
2342 case DW_OP_lit10:
2343 case DW_OP_lit11:
2344 case DW_OP_lit12:
2345 case DW_OP_lit13:
2346 case DW_OP_lit14:
2347 case DW_OP_lit15:
2348 case DW_OP_lit16:
2349 case DW_OP_lit17:
2350 case DW_OP_lit18:
2351 case DW_OP_lit19:
2352 case DW_OP_lit20:
2353 case DW_OP_lit21:
2354 case DW_OP_lit22:
2355 case DW_OP_lit23:
2356 case DW_OP_lit24:
2357 case DW_OP_lit25:
2358 case DW_OP_lit26:
2359 case DW_OP_lit27:
2360 case DW_OP_lit28:
2361 case DW_OP_lit29:
2362 case DW_OP_lit30:
2363 case DW_OP_lit31:
Greg Clayton644247c2011-07-07 01:59:51 +0000[diff] [blame]2364 stack.push_back(Scalar(op - DW_OP_lit0));
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2365 break;
2366
2367 //----------------------------------------------------------------------
2368 // OPCODE: DW_OP_regN
2369 // OPERANDS: none
2370 // DESCRIPTION: Push the value in register n on the top of the stack.
2371 //----------------------------------------------------------------------
2372 case DW_OP_reg0:
2373 case DW_OP_reg1:
2374 case DW_OP_reg2:
2375 case DW_OP_reg3:
2376 case DW_OP_reg4:
2377 case DW_OP_reg5:
2378 case DW_OP_reg6:
2379 case DW_OP_reg7:
2380 case DW_OP_reg8:
2381 case DW_OP_reg9:
2382 case DW_OP_reg10:
2383 case DW_OP_reg11:
2384 case DW_OP_reg12:
2385 case DW_OP_reg13:
2386 case DW_OP_reg14:
2387 case DW_OP_reg15:
2388 case DW_OP_reg16:
2389 case DW_OP_reg17:
2390 case DW_OP_reg18:
2391 case DW_OP_reg19:
2392 case DW_OP_reg20:
2393 case DW_OP_reg21:
2394 case DW_OP_reg22:
2395 case DW_OP_reg23:
2396 case DW_OP_reg24:
2397 case DW_OP_reg25:
2398 case DW_OP_reg26:
2399 case DW_OP_reg27:
2400 case DW_OP_reg28:
2401 case DW_OP_reg29:
2402 case DW_OP_reg30:
2403 case DW_OP_reg31:
2404 {
2405 reg_num = op - DW_OP_reg0;
2406
Jason Molenda2d107dd2010-11-20 01:28:30 +0000[diff] [blame]2407 if (ReadRegisterValueAsScalar (reg_ctx, reg_kind, reg_num, error_ptr, tmp))
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2408 stack.push_back(tmp);
2409 else
2410 return false;
2411 }
2412 break;
2413 //----------------------------------------------------------------------
2414 // OPCODE: DW_OP_regx
2415 // OPERANDS:
2416 // ULEB128 literal operand that encodes the register.
2417 // DESCRIPTION: Push the value in register on the top of the stack.
2418 //----------------------------------------------------------------------
2419 case DW_OP_regx:
2420 {
2421 reg_num = opcodes.GetULEB128(&offset);
Jason Molenda2d107dd2010-11-20 01:28:30 +0000[diff] [blame]2422 if (ReadRegisterValueAsScalar (reg_ctx, reg_kind, reg_num, error_ptr, tmp))
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2423 stack.push_back(tmp);
2424 else
2425 return false;
2426 }
2427 break;
2428
2429 //----------------------------------------------------------------------
2430 // OPCODE: DW_OP_bregN
2431 // OPERANDS:
2432 // SLEB128 offset from register N
2433 // DESCRIPTION: Value is in memory at the address specified by register
2434 // N plus an offset.
2435 //----------------------------------------------------------------------
2436 case DW_OP_breg0:
2437 case DW_OP_breg1:
2438 case DW_OP_breg2:
2439 case DW_OP_breg3:
2440 case DW_OP_breg4:
2441 case DW_OP_breg5:
2442 case DW_OP_breg6:
2443 case DW_OP_breg7:
2444 case DW_OP_breg8:
2445 case DW_OP_breg9:
2446 case DW_OP_breg10:
2447 case DW_OP_breg11:
2448 case DW_OP_breg12:
2449 case DW_OP_breg13:
2450 case DW_OP_breg14:
2451 case DW_OP_breg15:
2452 case DW_OP_breg16:
2453 case DW_OP_breg17:
2454 case DW_OP_breg18:
2455 case DW_OP_breg19:
2456 case DW_OP_breg20:
2457 case DW_OP_breg21:
2458 case DW_OP_breg22:
2459 case DW_OP_breg23:
2460 case DW_OP_breg24:
2461 case DW_OP_breg25:
2462 case DW_OP_breg26:
2463 case DW_OP_breg27:
2464 case DW_OP_breg28:
2465 case DW_OP_breg29:
2466 case DW_OP_breg30:
2467 case DW_OP_breg31:
2468 {
2469 reg_num = op - DW_OP_breg0;
2470
Jason Molenda2d107dd2010-11-20 01:28:30 +0000[diff] [blame]2471 if (ReadRegisterValueAsScalar (reg_ctx, reg_kind, reg_num, error_ptr, tmp))
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2472 {
2473 int64_t breg_offset = opcodes.GetSLEB128(&offset);
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]2474 tmp.ResolveValue(exe_ctx) += (uint64_t)breg_offset;
Sean Callanand1a5e012012-01-06 18:24:47 +0000[diff] [blame]2475 tmp.ClearContext();
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2476 stack.push_back(tmp);
2477 stack.back().SetValueType (Value::eValueTypeLoadAddress);
2478 }
2479 else
2480 return false;
2481 }
2482 break;
2483 //----------------------------------------------------------------------
2484 // OPCODE: DW_OP_bregx
2485 // OPERANDS: 2
2486 // ULEB128 literal operand that encodes the register.
2487 // SLEB128 offset from register N
2488 // DESCRIPTION: Value is in memory at the address specified by register
2489 // N plus an offset.
2490 //----------------------------------------------------------------------
2491 case DW_OP_bregx:
2492 {
2493 reg_num = opcodes.GetULEB128(&offset);
2494
Jason Molenda2d107dd2010-11-20 01:28:30 +0000[diff] [blame]2495 if (ReadRegisterValueAsScalar (reg_ctx, reg_kind, reg_num, error_ptr, tmp))
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2496 {
2497 int64_t breg_offset = opcodes.GetSLEB128(&offset);
Greg Clayton57ee3062013-07-11 22:46:58 +0000[diff] [blame]2498 tmp.ResolveValue(exe_ctx) += (uint64_t)breg_offset;
Sean Callanand1a5e012012-01-06 18:24:47 +0000[diff] [blame]2499 tmp.ClearContext();
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2500 stack.push_back(tmp);
2501 stack.back().SetValueType (Value::eValueTypeLoadAddress);
2502 }
2503 else
2504 return false;
2505 }
2506 break;
2507
2508 case DW_OP_fbreg:
Greg Claytonc14ee322011-09-22 04:58:26 +0000[diff] [blame]2509 if (exe_ctx)
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2510 {
Greg Claytonc14ee322011-09-22 04:58:26 +0000[diff] [blame]2511 if (frame)
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2512 {
Greg Claytonc14ee322011-09-22 04:58:26 +0000[diff] [blame]2513 Scalar value;
2514 if (frame->GetFrameBaseValue(value, error_ptr))
2515 {
2516 int64_t fbreg_offset = opcodes.GetSLEB128(&offset);
2517 value += fbreg_offset;
2518 stack.push_back(value);
2519 stack.back().SetValueType (Value::eValueTypeLoadAddress);
2520 }
2521 else
2522 return false;
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2523 }
2524 else
Greg Claytonc14ee322011-09-22 04:58:26 +0000[diff] [blame]2525 {
2526 if (error_ptr)
2527 error_ptr->SetErrorString ("Invalid stack frame in context for DW_OP_fbreg opcode.");
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2528 return false;
Greg Claytonc14ee322011-09-22 04:58:26 +0000[diff] [blame]2529 }
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2530 }
2531 else
2532 {
2533 if (error_ptr)
Greg Claytonc14ee322011-09-22 04:58:26 +0000[diff] [blame]2534 error_ptr->SetErrorStringWithFormat ("NULL execution context for DW_OP_fbreg.\n");
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2535 return false;
2536 }
Greg Claytonc14ee322011-09-22 04:58:26 +0000[diff] [blame]2537
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2538 break;
2539
2540 //----------------------------------------------------------------------
2541 // OPCODE: DW_OP_nop
2542 // OPERANDS: none
2543 // DESCRIPTION: A place holder. It has no effect on the location stack
2544 // or any of its values.
2545 //----------------------------------------------------------------------
2546 case DW_OP_nop:
2547 break;
2548
2549 //----------------------------------------------------------------------
2550 // OPCODE: DW_OP_piece
2551 // OPERANDS: 1
2552 // ULEB128: byte size of the piece
2553 // DESCRIPTION: The operand describes the size in bytes of the piece of
2554 // the object referenced by the DWARF expression whose result is at the
2555 // top of the stack. If the piece is located in a register, but does not
2556 // occupy the entire register, the placement of the piece within that
2557 // register is defined by the ABI.
2558 //
2559 // Many compilers store a single variable in sets of registers, or store
2560 // a variable partially in memory and partially in registers.
2561 // DW_OP_piece provides a way of describing how large a part of a
2562 // variable a particular DWARF expression refers to.
2563 //----------------------------------------------------------------------
2564 case DW_OP_piece:
2565 if (error_ptr)
2566 error_ptr->SetErrorString ("Unimplemented opcode DW_OP_piece.");
2567 return false;
2568
2569 //----------------------------------------------------------------------
2570 // OPCODE: DW_OP_push_object_address
2571 // OPERANDS: none
2572 // DESCRIPTION: Pushes the address of the object currently being
2573 // evaluated as part of evaluation of a user presented expression.
2574 // This object may correspond to an independent variable described by
2575 // its own DIE or it may be a component of an array, structure, or class
2576 // whose address has been dynamically determined by an earlier step
2577 // during user expression evaluation.
2578 //----------------------------------------------------------------------
2579 case DW_OP_push_object_address:
2580 if (error_ptr)
2581 error_ptr->SetErrorString ("Unimplemented opcode DW_OP_push_object_address.");
2582 return false;
2583
2584 //----------------------------------------------------------------------
2585 // OPCODE: DW_OP_call2
2586 // OPERANDS:
2587 // uint16_t compile unit relative offset of a DIE
2588 // DESCRIPTION: Performs subroutine calls during evaluation
2589 // of a DWARF expression. The operand is the 2-byte unsigned offset
2590 // of a debugging information entry in the current compilation unit.
2591 //
2592 // Operand interpretation is exactly like that for DW_FORM_ref2.
2593 //
2594 // This operation transfers control of DWARF expression evaluation
2595 // to the DW_AT_location attribute of the referenced DIE. If there is
2596 // no such attribute, then there is no effect. Execution of the DWARF
2597 // expression of a DW_AT_location attribute may add to and/or remove from
2598 // values on the stack. Execution returns to the point following the call
2599 // when the end of the attribute is reached. Values on the stack at the
2600 // time of the call may be used as parameters by the called expression
2601 // and values left on the stack by the called expression may be used as
2602 // return values by prior agreement between the calling and called
2603 // expressions.
2604 //----------------------------------------------------------------------
2605 case DW_OP_call2:
2606 if (error_ptr)
2607 error_ptr->SetErrorString ("Unimplemented opcode DW_OP_call2.");
2608 return false;
2609 //----------------------------------------------------------------------
2610 // OPCODE: DW_OP_call4
2611 // OPERANDS: 1
2612 // uint32_t compile unit relative offset of a DIE
2613 // DESCRIPTION: Performs a subroutine call during evaluation of a DWARF
2614 // expression. For DW_OP_call4, the operand is a 4-byte unsigned offset
2615 // of a debugging information entry in the current compilation unit.
2616 //
2617 // Operand interpretation DW_OP_call4 is exactly like that for
2618 // DW_FORM_ref4.
2619 //
2620 // This operation transfers control of DWARF expression evaluation
2621 // to the DW_AT_location attribute of the referenced DIE. If there is
2622 // no such attribute, then there is no effect. Execution of the DWARF
2623 // expression of a DW_AT_location attribute may add to and/or remove from
2624 // values on the stack. Execution returns to the point following the call
2625 // when the end of the attribute is reached. Values on the stack at the
2626 // time of the call may be used as parameters by the called expression
2627 // and values left on the stack by the called expression may be used as
2628 // return values by prior agreement between the calling and called
2629 // expressions.
2630 //----------------------------------------------------------------------
2631 case DW_OP_call4:
2632 if (error_ptr)
2633 error_ptr->SetErrorString ("Unimplemented opcode DW_OP_call4.");
2634 return false;
2635
Andrew Kaylor9e9f1db2013-03-06 21:13:09 +0000[diff] [blame]2636 //----------------------------------------------------------------------
2637 // OPCODE: DW_OP_stack_value
2638 // OPERANDS: None
2639 // DESCRIPTION: Specifies that the object does not exist in memory but
2640 // rather is a constant value. The value from the top of the stack is
2641 // the value to be used. This is the actual object value and not the
2642 // location.
2643 //----------------------------------------------------------------------
2644 case DW_OP_stack_value:
2645 stack.back().SetValueType(Value::eValueTypeScalar);
2646 break;
Ashok Thirumurthi6e264d32013-07-29 16:05:11 +0000[diff] [blame]2647
2648 //----------------------------------------------------------------------
2649 // OPCODE: DW_OP_call_frame_cfa
2650 // OPERANDS: None
2651 // DESCRIPTION: Specifies a DWARF expression that pushes the value of
2652 // the canonical frame address consistent with the call frame information
2653 // located in .debug_frame (or in the FDEs of the eh_frame section).
2654 //----------------------------------------------------------------------
2655 case DW_OP_call_frame_cfa:
2656 if (frame)
2657 {
2658 // Note that we don't have to parse FDEs because this DWARF expression
2659 // is commonly evaluated with a valid stack frame.
2660 StackID id = frame->GetStackID();
2661 addr_t cfa = id.GetCallFrameAddress();
2662 if (cfa != LLDB_INVALID_ADDRESS)
2663 {
2664 stack.push_back(Scalar(cfa));
2665 stack.back().SetValueType (Value::eValueTypeHostAddress);
2666 }
2667 else
2668 if (error_ptr)
2669 error_ptr->SetErrorString ("Stack frame does not include a canonical frame address for DW_OP_call_frame_cfa opcode.");
2670 }
2671 else
2672 {
2673 if (error_ptr)
2674 error_ptr->SetErrorString ("Invalid stack frame in context for DW_OP_call_frame_cfa opcode.");
2675 return false;
2676 }
2677 break;
Richard Mitton0a558352013-10-17 21:14:00 +0000[diff] [blame]2678
2679 //----------------------------------------------------------------------
2680 // OPCODE: DW_OP_GNU_push_tls_address
2681 // OPERANDS: none
2682 // DESCRIPTION: Pops a TLS offset from the stack, converts it to
2683 // an absolute value, and pushes it back on.
2684 //----------------------------------------------------------------------
2685 case DW_OP_GNU_push_tls_address:
2686 {
2687 if (stack.size() < 1)
2688 {
2689 if (error_ptr)
2690 error_ptr->SetErrorString("DW_OP_GNU_push_tls_address needs an argument.");
2691 return false;
2692 }
2693
2694 if (!exe_ctx || !opcode_ctx)
2695 {
2696 if (error_ptr)
2697 error_ptr->SetErrorString("No context to evaluate TLS within.");
2698 return false;
2699 }
2700
2701 Thread *thread = exe_ctx->GetThreadPtr();
2702 if (!thread)
2703 {
2704 if (error_ptr)
2705 error_ptr->SetErrorString("No thread to evaluate TLS within.");
2706 return false;
2707 }
2708
2709 // Lookup the TLS block address for this thread and module.
2710 addr_t tls_addr = thread->GetThreadLocalData (opcode_ctx);
2711
2712 if (tls_addr == LLDB_INVALID_ADDRESS)
2713 {
2714 if (error_ptr)
2715 error_ptr->SetErrorString ("No TLS data currently exists for this thread.");
2716 return false;
2717 }
2718
2719 // Convert the TLS offset into the absolute address.
2720 Scalar tmp = stack.back().ResolveValue(exe_ctx);
2721 stack.back() = tmp + tls_addr;
2722 stack.back().SetValueType (Value::eValueTypeLoadAddress);
2723 }
2724 break;
2725
Daniel Malea8f0c4462013-07-30 21:26:24 +0000[diff] [blame]2726 default:
Ashok Thirumurthi3e0afb82013-07-31 03:56:45 +0000[diff] [blame]2727 if (log)
2728 log->Printf("Unhandled opcode %s in DWARFExpression.", DW_OP_value_to_name(op));
2729 break;
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2730 }
2731 }
2732
2733 if (stack.empty())
2734 {
2735 if (error_ptr)
2736 error_ptr->SetErrorString ("Stack empty after evaluation.");
2737 return false;
2738 }
Sean Callanan7dd98122011-10-14 20:34:21 +0000[diff] [blame]2739 else if (log && log->GetVerbose())
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2740 {
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2741 size_t count = stack.size();
Sylvestre Ledru779f9212013-10-31 23:55:19 +0000[diff] [blame]2742 log->Printf("Stack after operation has %zu values:", count);
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2743 for (size_t i=0; i<count; ++i)
2744 {
2745 StreamString new_value;
Daniel Malead01b2952012-11-29 21:49:15 +0000[diff] [blame]2746 new_value.Printf("[%" PRIu64 "]", (uint64_t)i);
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2747 stack[i].Dump(&new_value);
Sean Callananf06ba8d2010-06-23 00:47:48 +0000[diff] [blame]2748 log->Printf(" %s", new_value.GetData());
Chris Lattner30fdc8d2010-06-08 16:52:24 +0000[diff] [blame]2749 }
2750 }
2751
2752 result = stack.back();
2753 return true; // Return true on success
2754}
2755