1 //===-- ABIMacOSX_i386.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 "ABIMacOSX_i386.h"
11
12 #include "lldb/Core/ConstString.h"
13 #include "lldb/Core/Error.h"
14 #include "lldb/Core/Module.h"
15 #include "lldb/Core/PluginManager.h"
16 #include "lldb/Core/RegisterValue.h"
17 #include "lldb/Core/Scalar.h"
18 #include "lldb/Core/ValueObjectConstResult.h"
19 #include "lldb/Symbol/ClangASTContext.h"
20 #include "lldb/Symbol/UnwindPlan.h"
21 #include "lldb/Target/Process.h"
22 #include "lldb/Target/RegisterContext.h"
23 #include "lldb/Target/Target.h"
24 #include "lldb/Target/Thread.h"
25
26 #include "llvm/ADT/Triple.h"
27
28 #include <vector>
29
30 using namespace lldb;
31 using namespace lldb_private;
32
33 enum
34 {
35 gcc_eax = 0,
36 gcc_ecx,
37 gcc_edx,
38 gcc_ebx,
39 gcc_ebp,
40 gcc_esp,
41 gcc_esi,
42 gcc_edi,
43 gcc_eip,
44 gcc_eflags
45 };
46
47 enum
48 {
49 dwarf_eax = 0,
50 dwarf_ecx,
51 dwarf_edx,
52 dwarf_ebx,
53 dwarf_esp,
54 dwarf_ebp,
55 dwarf_esi,
56 dwarf_edi,
57 dwarf_eip,
58 dwarf_eflags,
59 dwarf_stmm0 = 11,
60 dwarf_stmm1,
61 dwarf_stmm2,
62 dwarf_stmm3,
63 dwarf_stmm4,
64 dwarf_stmm5,
65 dwarf_stmm6,
66 dwarf_stmm7,
67 dwarf_xmm0 = 21,
68 dwarf_xmm1,
69 dwarf_xmm2,
70 dwarf_xmm3,
71 dwarf_xmm4,
72 dwarf_xmm5,
73 dwarf_xmm6,
74 dwarf_xmm7,
75 dwarf_ymm0 = dwarf_xmm0,
76 dwarf_ymm1 = dwarf_xmm1,
77 dwarf_ymm2 = dwarf_xmm2,
78 dwarf_ymm3 = dwarf_xmm3,
79 dwarf_ymm4 = dwarf_xmm4,
80 dwarf_ymm5 = dwarf_xmm5,
81 dwarf_ymm6 = dwarf_xmm6,
82 dwarf_ymm7 = dwarf_xmm7
83 };
84
85 enum
86 {
87 gdb_eax = 0,
88 gdb_ecx = 1,
89 gdb_edx = 2,
90 gdb_ebx = 3,
91 gdb_esp = 4,
92 gdb_ebp = 5,
93 gdb_esi = 6,
94 gdb_edi = 7,
95 gdb_eip = 8,
96 gdb_eflags = 9,
97 gdb_cs = 10,
98 gdb_ss = 11,
99 gdb_ds = 12,
100 gdb_es = 13,
101 gdb_fs = 14,
102 gdb_gs = 15,
103 gdb_stmm0 = 16,
104 gdb_stmm1 = 17,
105 gdb_stmm2 = 18,
106 gdb_stmm3 = 19,
107 gdb_stmm4 = 20,
108 gdb_stmm5 = 21,
109 gdb_stmm6 = 22,
110 gdb_stmm7 = 23,
111 gdb_fctrl = 24, gdb_fcw = gdb_fctrl,
112 gdb_fstat = 25, gdb_fsw = gdb_fstat,
113 gdb_ftag = 26, gdb_ftw = gdb_ftag,
114 gdb_fiseg = 27, gdb_fpu_cs = gdb_fiseg,
115 gdb_fioff = 28, gdb_ip = gdb_fioff,
116 gdb_foseg = 29, gdb_fpu_ds = gdb_foseg,
117 gdb_fooff = 30, gdb_dp = gdb_fooff,
118 gdb_fop = 31,
119 gdb_xmm0 = 32,
120 gdb_xmm1 = 33,
121 gdb_xmm2 = 34,
122 gdb_xmm3 = 35,
123 gdb_xmm4 = 36,
124 gdb_xmm5 = 37,
125 gdb_xmm6 = 38,
126 gdb_xmm7 = 39,
127 gdb_mxcsr = 40,
128 gdb_mm0 = 41,
129 gdb_mm1 = 42,
130 gdb_mm2 = 43,
131 gdb_mm3 = 44,
132 gdb_mm4 = 45,
133 gdb_mm5 = 46,
134 gdb_mm6 = 47,
135 gdb_mm7 = 48,
136 gdb_ymm0 = gdb_xmm0,
137 gdb_ymm1 = gdb_xmm1,
138 gdb_ymm2 = gdb_xmm2,
139 gdb_ymm3 = gdb_xmm3,
140 gdb_ymm4 = gdb_xmm4,
141 gdb_ymm5 = gdb_xmm5,
142 gdb_ymm6 = gdb_xmm6,
143 gdb_ymm7 = gdb_xmm7
144 };
145
146
147 static RegisterInfo g_register_infos[] =
148 {
149 // NAME ALT SZ OFF ENCODING FORMAT COMPILER DWARF GENERIC GDB LLDB NATIVE VALUE REGS INVALIDATE REGS
150 // ====== ======= == === ============= ============ ===================== ===================== ============================ ==================== ====================== ========== ===============
151 { "eax", NULL, 4, 0, eEncodingUint , eFormatHex , { gcc_eax , dwarf_eax , LLDB_INVALID_REGNUM , gdb_eax , LLDB_INVALID_REGNUM }, NULL, NULL},
152 { "ebx" , NULL, 4, 0, eEncodingUint , eFormatHex , { gcc_ebx , dwarf_ebx , LLDB_INVALID_REGNUM , gdb_ebx , LLDB_INVALID_REGNUM }, NULL, NULL},
153 { "ecx" , NULL, 4, 0, eEncodingUint , eFormatHex , { gcc_ecx , dwarf_ecx , LLDB_REGNUM_GENERIC_ARG4 , gdb_ecx , LLDB_INVALID_REGNUM }, NULL, NULL},
154 { "edx" , NULL, 4, 0, eEncodingUint , eFormatHex , { gcc_edx , dwarf_edx , LLDB_REGNUM_GENERIC_ARG3 , gdb_edx , LLDB_INVALID_REGNUM }, NULL, NULL},
155 { "esi" , NULL, 4, 0, eEncodingUint , eFormatHex , { gcc_esi , dwarf_esi , LLDB_REGNUM_GENERIC_ARG2 , gdb_esi , LLDB_INVALID_REGNUM }, NULL, NULL},
156 { "edi" , NULL, 4, 0, eEncodingUint , eFormatHex , { gcc_edi , dwarf_edi , LLDB_REGNUM_GENERIC_ARG1 , gdb_edi , LLDB_INVALID_REGNUM }, NULL, NULL},
157 { "ebp" , "fp", 4, 0, eEncodingUint , eFormatHex , { gcc_ebp , dwarf_ebp , LLDB_REGNUM_GENERIC_FP , gdb_ebp , LLDB_INVALID_REGNUM }, NULL, NULL},
158 { "esp" , "sp", 4, 0, eEncodingUint , eFormatHex , { gcc_esp , dwarf_esp , LLDB_REGNUM_GENERIC_SP , gdb_esp , LLDB_INVALID_REGNUM }, NULL, NULL},
159 { "eip" , "pc", 4, 0, eEncodingUint , eFormatHex , { gcc_eip , dwarf_eip , LLDB_REGNUM_GENERIC_PC , gdb_eip , LLDB_INVALID_REGNUM }, NULL, NULL},
160 { "eflags", NULL, 4, 0, eEncodingUint , eFormatHex , { LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , LLDB_REGNUM_GENERIC_FLAGS , gdb_eflags , LLDB_INVALID_REGNUM }, NULL, NULL},
161 { "cs" , NULL, 4, 0, eEncodingUint , eFormatHex , { LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , gdb_cs , LLDB_INVALID_REGNUM }, NULL, NULL},
162 { "ss" , NULL, 4, 0, eEncodingUint , eFormatHex , { LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , gdb_ss , LLDB_INVALID_REGNUM }, NULL, NULL},
163 { "ds" , NULL, 4, 0, eEncodingUint , eFormatHex , { LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , gdb_ds , LLDB_INVALID_REGNUM }, NULL, NULL},
164 { "es" , NULL, 4, 0, eEncodingUint , eFormatHex , { LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , gdb_es , LLDB_INVALID_REGNUM }, NULL, NULL},
165 { "fs" , NULL, 4, 0, eEncodingUint , eFormatHex , { LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , gdb_fs , LLDB_INVALID_REGNUM }, NULL, NULL},
166 { "gs" , NULL, 4, 0, eEncodingUint , eFormatHex , { LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , gdb_gs , LLDB_INVALID_REGNUM }, NULL, NULL},
167 { "stmm0" , NULL, 10, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_stmm0 , LLDB_INVALID_REGNUM , gdb_stmm0 , LLDB_INVALID_REGNUM }, NULL, NULL},
168 { "stmm1" , NULL, 10, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_stmm1 , LLDB_INVALID_REGNUM , gdb_stmm1 , LLDB_INVALID_REGNUM }, NULL, NULL},
169 { "stmm2" , NULL, 10, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_stmm2 , LLDB_INVALID_REGNUM , gdb_stmm2 , LLDB_INVALID_REGNUM }, NULL, NULL},
170 { "stmm3" , NULL, 10, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_stmm3 , LLDB_INVALID_REGNUM , gdb_stmm3 , LLDB_INVALID_REGNUM }, NULL, NULL},
171 { "stmm4" , NULL, 10, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_stmm4 , LLDB_INVALID_REGNUM , gdb_stmm4 , LLDB_INVALID_REGNUM }, NULL, NULL},
172 { "stmm5" , NULL, 10, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_stmm5 , LLDB_INVALID_REGNUM , gdb_stmm5 , LLDB_INVALID_REGNUM }, NULL, NULL},
173 { "stmm6" , NULL, 10, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_stmm6 , LLDB_INVALID_REGNUM , gdb_stmm6 , LLDB_INVALID_REGNUM }, NULL, NULL},
174 { "stmm7" , NULL, 10, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_stmm7 , LLDB_INVALID_REGNUM , gdb_stmm7 , LLDB_INVALID_REGNUM }, NULL, NULL},
175 { "fctrl" , NULL, 4, 0, eEncodingUint , eFormatHex , { LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , gdb_fctrl , LLDB_INVALID_REGNUM }, NULL, NULL},
176 { "fstat" , NULL, 4, 0, eEncodingUint , eFormatHex , { LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , gdb_fstat , LLDB_INVALID_REGNUM }, NULL, NULL},
177 { "ftag" , NULL, 4, 0, eEncodingUint , eFormatHex , { LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , gdb_ftag , LLDB_INVALID_REGNUM }, NULL, NULL},
178 { "fiseg" , NULL, 4, 0, eEncodingUint , eFormatHex , { LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , gdb_fiseg , LLDB_INVALID_REGNUM }, NULL, NULL},
179 { "fioff" , NULL, 4, 0, eEncodingUint , eFormatHex , { LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , gdb_fioff , LLDB_INVALID_REGNUM }, NULL, NULL},
180 { "foseg" , NULL, 4, 0, eEncodingUint , eFormatHex , { LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , gdb_foseg , LLDB_INVALID_REGNUM }, NULL, NULL},
181 { "fooff" , NULL, 4, 0, eEncodingUint , eFormatHex , { LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , gdb_fooff , LLDB_INVALID_REGNUM }, NULL, NULL},
182 { "fop" , NULL, 4, 0, eEncodingUint , eFormatHex , { LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , gdb_fop , LLDB_INVALID_REGNUM }, NULL, NULL},
183 { "xmm0" , NULL, 16, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_xmm0 , LLDB_INVALID_REGNUM , gdb_xmm0 , LLDB_INVALID_REGNUM }, NULL, NULL},
184 { "xmm1" , NULL, 16, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_xmm1 , LLDB_INVALID_REGNUM , gdb_xmm1 , LLDB_INVALID_REGNUM }, NULL, NULL},
185 { "xmm2" , NULL, 16, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_xmm2 , LLDB_INVALID_REGNUM , gdb_xmm2 , LLDB_INVALID_REGNUM }, NULL, NULL},
186 { "xmm3" , NULL, 16, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_xmm3 , LLDB_INVALID_REGNUM , gdb_xmm3 , LLDB_INVALID_REGNUM }, NULL, NULL},
187 { "xmm4" , NULL, 16, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_xmm4 , LLDB_INVALID_REGNUM , gdb_xmm4 , LLDB_INVALID_REGNUM }, NULL, NULL},
188 { "xmm5" , NULL, 16, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_xmm5 , LLDB_INVALID_REGNUM , gdb_xmm5 , LLDB_INVALID_REGNUM }, NULL, NULL},
189 { "xmm6" , NULL, 16, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_xmm6 , LLDB_INVALID_REGNUM , gdb_xmm6 , LLDB_INVALID_REGNUM }, NULL, NULL},
190 { "xmm7" , NULL, 16, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_xmm7 , LLDB_INVALID_REGNUM , gdb_xmm7 , LLDB_INVALID_REGNUM }, NULL, NULL},
191 { "mxcsr" , NULL, 4, 0, eEncodingUint , eFormatHex , { LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , gdb_mxcsr , LLDB_INVALID_REGNUM }, NULL, NULL},
192 { "ymm0" , NULL, 32, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_ymm0 , LLDB_INVALID_REGNUM , gdb_ymm0 , LLDB_INVALID_REGNUM }, NULL, NULL},
193 { "ymm1" , NULL, 32, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_ymm1 , LLDB_INVALID_REGNUM , gdb_ymm1 , LLDB_INVALID_REGNUM }, NULL, NULL},
194 { "ymm2" , NULL, 32, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_ymm2 , LLDB_INVALID_REGNUM , gdb_ymm2 , LLDB_INVALID_REGNUM }, NULL, NULL},
195 { "ymm3" , NULL, 32, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_ymm3 , LLDB_INVALID_REGNUM , gdb_ymm3 , LLDB_INVALID_REGNUM }, NULL, NULL},
196 { "ymm4" , NULL, 32, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_ymm4 , LLDB_INVALID_REGNUM , gdb_ymm4 , LLDB_INVALID_REGNUM }, NULL, NULL},
197 { "ymm5" , NULL, 32, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_ymm5 , LLDB_INVALID_REGNUM , gdb_ymm5 , LLDB_INVALID_REGNUM }, NULL, NULL},
198 { "ymm6" , NULL, 32, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_ymm6 , LLDB_INVALID_REGNUM , gdb_ymm6 , LLDB_INVALID_REGNUM }, NULL, NULL},
199 { "ymm7" , NULL, 32, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_ymm7 , LLDB_INVALID_REGNUM , gdb_ymm7 , LLDB_INVALID_REGNUM }, NULL, NULL}
200 };
201
202 static const uint32_t k_num_register_infos = sizeof(g_register_infos)/sizeof(RegisterInfo);
203 static bool g_register_info_names_constified = false;
204
205 const lldb_private::RegisterInfo *
GetRegisterInfoArray(uint32_t & count)206 ABIMacOSX_i386::GetRegisterInfoArray (uint32_t &count)
207 {
208 // Make the C-string names and alt_names for the register infos into const
209 // C-string values by having the ConstString unique the names in the global
210 // constant C-string pool.
211 if (!g_register_info_names_constified)
212 {
213 g_register_info_names_constified = true;
214 for (uint32_t i=0; i<k_num_register_infos; ++i)
215 {
216 if (g_register_infos[i].name)
217 g_register_infos[i].name = ConstString(g_register_infos[i].name).GetCString();
218 if (g_register_infos[i].alt_name)
219 g_register_infos[i].alt_name = ConstString(g_register_infos[i].alt_name).GetCString();
220 }
221 }
222 count = k_num_register_infos;
223 return g_register_infos;
224 }
225
226 size_t
GetRedZoneSize() const227 ABIMacOSX_i386::GetRedZoneSize () const
228 {
229 return 0;
230 }
231
232 //------------------------------------------------------------------
233 // Static Functions
234 //------------------------------------------------------------------
235 ABISP
CreateInstance(const ArchSpec & arch)236 ABIMacOSX_i386::CreateInstance (const ArchSpec &arch)
237 {
238 static ABISP g_abi_sp;
239 if (arch.GetTriple().getArch() == llvm::Triple::x86)
240 {
241 if (!g_abi_sp)
242 g_abi_sp.reset (new ABIMacOSX_i386);
243 return g_abi_sp;
244 }
245 return ABISP();
246 }
247
248 bool
PrepareTrivialCall(Thread & thread,addr_t sp,addr_t func_addr,addr_t return_addr,llvm::ArrayRef<addr_t> args) const249 ABIMacOSX_i386::PrepareTrivialCall (Thread &thread,
250 addr_t sp,
251 addr_t func_addr,
252 addr_t return_addr,
253 llvm::ArrayRef<addr_t> args) const
254 {
255 RegisterContext *reg_ctx = thread.GetRegisterContext().get();
256 if (!reg_ctx)
257 return false;
258 uint32_t pc_reg_num = reg_ctx->ConvertRegisterKindToRegisterNumber (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_PC);
259 uint32_t sp_reg_num = reg_ctx->ConvertRegisterKindToRegisterNumber (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_SP);
260
261 // When writing a register value down to memory, the register info used
262 // to write memory just needs to have the correct size of a 32 bit register,
263 // the actual register it pertains to is not important, just the size needs
264 // to be correct. Here we use "eax"...
265 const RegisterInfo *reg_info_32 = reg_ctx->GetRegisterInfoByName("eax");
266 if (!reg_info_32)
267 return false; // TODO this should actually never happen
268
269 // Make room for the argument(s) on the stack
270
271 Error error;
272 RegisterValue reg_value;
273
274 // Write any arguments onto the stack
275 sp -= 4 * args.size();
276
277 // Align the SP
278 sp &= ~(16ull-1ull); // 16-byte alignment
279
280 addr_t arg_pos = sp;
281
282 for (addr_t arg : args)
283 {
284 reg_value.SetUInt32(arg);
285 error = reg_ctx->WriteRegisterValueToMemory (reg_info_32,
286 arg_pos,
287 reg_info_32->byte_size,
288 reg_value);
289 if (error.Fail())
290 return false;
291 arg_pos += 4;
292 }
293
294 // The return address is pushed onto the stack (yes after we just set the
295 // alignment above!).
296 sp -= 4;
297 reg_value.SetUInt32(return_addr);
298 error = reg_ctx->WriteRegisterValueToMemory (reg_info_32,
299 sp,
300 reg_info_32->byte_size,
301 reg_value);
302 if (error.Fail())
303 return false;
304
305 // %esp is set to the actual stack value.
306
307 if (!reg_ctx->WriteRegisterFromUnsigned (sp_reg_num, sp))
308 return false;
309
310 // %eip is set to the address of the called function.
311
312 if (!reg_ctx->WriteRegisterFromUnsigned (pc_reg_num, func_addr))
313 return false;
314
315 return true;
316 }
317
318 bool
PrepareNormalCall(Thread & thread,addr_t sp,addr_t func_addr,addr_t return_addr,ValueList & args) const319 ABIMacOSX_i386::PrepareNormalCall (Thread &thread,
320 addr_t sp,
321 addr_t func_addr,
322 addr_t return_addr,
323 ValueList &args) const
324 {
325 ExecutionContext exe_ctx (thread.shared_from_this());
326 RegisterContext *reg_ctx = thread.GetRegisterContext().get();
327 if (!reg_ctx)
328 return false;
329
330 Process *process = exe_ctx.GetProcessPtr();
331 Error error;
332 uint32_t fp_reg_num = reg_ctx->ConvertRegisterKindToRegisterNumber (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_FP);
333 uint32_t pc_reg_num = reg_ctx->ConvertRegisterKindToRegisterNumber (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_PC);
334 uint32_t sp_reg_num = reg_ctx->ConvertRegisterKindToRegisterNumber (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_SP);
335
336 // Do the argument layout
337
338 std::vector <uint32_t> argLayout; // 4-byte chunks, as discussed in the ABI Function Call Guide
339
340 size_t numArgs = args.GetSize();
341 size_t index;
342
343 for (index = 0; index < numArgs; ++index)
344 {
345 Value *val = args.GetValueAtIndex(index);
346
347 if (!val)
348 return false;
349
350 switch (val->GetValueType())
351 {
352 case Value::eValueTypeScalar:
353 {
354 Scalar &scalar = val->GetScalar();
355 switch (scalar.GetType())
356 {
357 case Scalar::e_void:
358 return false;
359 case Scalar::e_sint:
360 case Scalar::e_uint:
361 case Scalar::e_slong:
362 case Scalar::e_ulong:
363 case Scalar::e_slonglong:
364 case Scalar::e_ulonglong:
365 {
366 uint64_t data = scalar.ULongLong();
367
368 switch (scalar.GetByteSize())
369 {
370 default:
371 return false;
372 case 1:
373 argLayout.push_back((uint32_t)(data & 0xffull));
374 break;
375 case 2:
376 argLayout.push_back((uint32_t)(data & 0xffffull));
377 break;
378 case 4:
379 argLayout.push_back((uint32_t)(data & 0xffffffffull));
380 break;
381 case 8:
382 argLayout.push_back((uint32_t)(data & 0xffffffffull));
383 argLayout.push_back((uint32_t)(data >> 32));
384 break;
385 }
386 }
387 break;
388 case Scalar::e_float:
389 {
390 float data = scalar.Float();
391 uint32_t dataRaw = *((uint32_t*)(&data));
392 argLayout.push_back(dataRaw);
393 }
394 break;
395 case Scalar::e_double:
396 {
397 double data = scalar.Double();
398 uint32_t *dataRaw = ((uint32_t*)(&data));
399 argLayout.push_back(dataRaw[0]);
400 argLayout.push_back(dataRaw[1]);
401 }
402 break;
403 case Scalar::e_long_double:
404 {
405 long double data = scalar.Double();
406 uint32_t *dataRaw = ((uint32_t*)(&data));
407 while ((argLayout.size() * 4) & 0xf)
408 argLayout.push_back(0);
409 argLayout.push_back(dataRaw[0]);
410 argLayout.push_back(dataRaw[1]);
411 argLayout.push_back(dataRaw[2]);
412 argLayout.push_back(dataRaw[3]);
413 }
414 break;
415 }
416 }
417 break;
418 case Value::eValueTypeHostAddress:
419 {
420 ClangASTType clang_type (val->GetClangType());
421 if (clang_type)
422 {
423 uint32_t cstr_length = 0;
424 if (clang_type.IsCStringType (cstr_length))
425 {
426 const char *cstr = (const char*)val->GetScalar().ULongLong();
427 cstr_length = strlen(cstr);
428
429 // Push the string onto the stack immediately.
430
431 sp -= (cstr_length + 1);
432
433 if (process->WriteMemory(sp, cstr, cstr_length + 1, error) != (cstr_length + 1))
434 return false;
435
436 // Put the address of the string into the argument array.
437
438 argLayout.push_back((uint32_t)(sp & 0xffffffff));
439 }
440 else
441 {
442 return false;
443 }
444 }
445 break;
446 }
447 break;
448 case Value::eValueTypeFileAddress:
449 case Value::eValueTypeLoadAddress:
450 default:
451 return false;
452 }
453 }
454
455 // Make room for the arguments on the stack
456
457 sp -= 4 * argLayout.size();
458
459 // Align the SP
460
461 sp &= ~(16ull-1ull); // 16-byte alignment
462
463 // Write the arguments on the stack
464
465 size_t numChunks = argLayout.size();
466
467 for (index = 0; index < numChunks; ++index)
468 if (process->WriteMemory(sp + (index * 4), &argLayout[index], sizeof(uint32_t), error) != sizeof(uint32_t))
469 return false;
470
471 // The return address is pushed onto the stack.
472
473 sp -= 4;
474 uint32_t returnAddressU32 = return_addr;
475 if (process->WriteMemory (sp, &returnAddressU32, sizeof(returnAddressU32), error) != sizeof(returnAddressU32))
476 return false;
477
478 // %esp is set to the actual stack value.
479
480 if (!reg_ctx->WriteRegisterFromUnsigned(sp_reg_num, sp))
481 return false;
482
483 // %ebp is set to a fake value, in our case 0x0x00000000
484
485 if (!reg_ctx->WriteRegisterFromUnsigned(fp_reg_num, 0x00000000))
486 return false;
487
488 // %eip is set to the address of the called function.
489
490 if (!reg_ctx->WriteRegisterFromUnsigned(pc_reg_num, func_addr))
491 return false;
492
493 return true;
494 }
495
496 static bool
ReadIntegerArgument(Scalar & scalar,unsigned int bit_width,bool is_signed,Process * process,addr_t & current_stack_argument)497 ReadIntegerArgument (Scalar &scalar,
498 unsigned int bit_width,
499 bool is_signed,
500 Process *process,
501 addr_t ¤t_stack_argument)
502 {
503
504 uint32_t byte_size = (bit_width + (8-1))/8;
505 Error error;
506 if (process->ReadScalarIntegerFromMemory(current_stack_argument, byte_size, is_signed, scalar, error))
507 {
508 current_stack_argument += byte_size;
509 return true;
510 }
511 return false;
512 }
513
514 bool
GetArgumentValues(Thread & thread,ValueList & values) const515 ABIMacOSX_i386::GetArgumentValues (Thread &thread,
516 ValueList &values) const
517 {
518 unsigned int num_values = values.GetSize();
519 unsigned int value_index;
520
521 // Get the pointer to the first stack argument so we have a place to start
522 // when reading data
523
524 RegisterContext *reg_ctx = thread.GetRegisterContext().get();
525
526 if (!reg_ctx)
527 return false;
528
529 addr_t sp = reg_ctx->GetSP(0);
530
531 if (!sp)
532 return false;
533
534 addr_t current_stack_argument = sp + 4; // jump over return address
535
536 for (value_index = 0;
537 value_index < num_values;
538 ++value_index)
539 {
540 Value *value = values.GetValueAtIndex(value_index);
541
542 if (!value)
543 return false;
544
545 // We currently only support extracting values with Clang QualTypes.
546 // Do we care about others?
547 ClangASTType clang_type (value->GetClangType());
548 if (clang_type)
549 {
550 bool is_signed;
551
552 if (clang_type.IsIntegerType (is_signed))
553 {
554 ReadIntegerArgument(value->GetScalar(),
555 clang_type.GetBitSize(),
556 is_signed,
557 thread.GetProcess().get(),
558 current_stack_argument);
559 }
560 else if (clang_type.IsPointerType())
561 {
562 ReadIntegerArgument(value->GetScalar(),
563 clang_type.GetBitSize(),
564 false,
565 thread.GetProcess().get(),
566 current_stack_argument);
567 }
568 }
569 }
570
571 return true;
572 }
573
574 Error
SetReturnValueObject(lldb::StackFrameSP & frame_sp,lldb::ValueObjectSP & new_value_sp)575 ABIMacOSX_i386::SetReturnValueObject(lldb::StackFrameSP &frame_sp, lldb::ValueObjectSP &new_value_sp)
576 {
577 Error error;
578 if (!new_value_sp)
579 {
580 error.SetErrorString("Empty value object for return value.");
581 return error;
582 }
583
584 ClangASTType clang_type = new_value_sp->GetClangType();
585 if (!clang_type)
586 {
587 error.SetErrorString ("Null clang type for return value.");
588 return error;
589 }
590
591 Thread *thread = frame_sp->GetThread().get();
592
593 bool is_signed;
594 uint32_t count;
595 bool is_complex;
596
597 RegisterContext *reg_ctx = thread->GetRegisterContext().get();
598
599 bool set_it_simple = false;
600 if (clang_type.IsIntegerType (is_signed) || clang_type.IsPointerType())
601 {
602 DataExtractor data;
603 size_t num_bytes = new_value_sp->GetData(data);
604 lldb::offset_t offset = 0;
605 if (num_bytes <= 8)
606 {
607 const RegisterInfo *eax_info = reg_ctx->GetRegisterInfoByName("eax", 0);
608 if (num_bytes <= 4)
609 {
610 uint32_t raw_value = data.GetMaxU32(&offset, num_bytes);
611
612 if (reg_ctx->WriteRegisterFromUnsigned (eax_info, raw_value))
613 set_it_simple = true;
614 }
615 else
616 {
617 uint32_t raw_value = data.GetMaxU32(&offset, 4);
618
619 if (reg_ctx->WriteRegisterFromUnsigned (eax_info, raw_value))
620 {
621 const RegisterInfo *edx_info = reg_ctx->GetRegisterInfoByName("edx", 0);
622 uint32_t raw_value = data.GetMaxU32(&offset, num_bytes - offset);
623
624 if (reg_ctx->WriteRegisterFromUnsigned (edx_info, raw_value))
625 set_it_simple = true;
626 }
627 }
628 }
629 else
630 {
631 error.SetErrorString("We don't support returning longer than 64 bit integer values at present.");
632 }
633 }
634 else if (clang_type.IsFloatingPointType (count, is_complex))
635 {
636 if (is_complex)
637 error.SetErrorString ("We don't support returning complex values at present");
638 else
639 error.SetErrorString ("We don't support returning float values at present");
640 }
641
642 if (!set_it_simple)
643 error.SetErrorString ("We only support setting simple integer return types at present.");
644
645 return error;
646 }
647
648 ValueObjectSP
GetReturnValueObjectImpl(Thread & thread,ClangASTType & clang_type) const649 ABIMacOSX_i386::GetReturnValueObjectImpl (Thread &thread,
650 ClangASTType &clang_type) const
651 {
652 Value value;
653 ValueObjectSP return_valobj_sp;
654
655 if (!clang_type)
656 return return_valobj_sp;
657
658 //value.SetContext (Value::eContextTypeClangType, clang_type.GetOpaqueQualType());
659 value.SetClangType (clang_type);
660
661 RegisterContext *reg_ctx = thread.GetRegisterContext().get();
662 if (!reg_ctx)
663 return return_valobj_sp;
664
665 bool is_signed;
666
667 if (clang_type.IsIntegerType (is_signed))
668 {
669 size_t bit_width = clang_type.GetBitSize();
670
671 unsigned eax_id = reg_ctx->GetRegisterInfoByName("eax", 0)->kinds[eRegisterKindLLDB];
672 unsigned edx_id = reg_ctx->GetRegisterInfoByName("edx", 0)->kinds[eRegisterKindLLDB];
673
674 switch (bit_width)
675 {
676 default:
677 case 128:
678 // Scalar can't hold 128-bit literals, so we don't handle this
679 return return_valobj_sp;
680 case 64:
681 uint64_t raw_value;
682 raw_value = thread.GetRegisterContext()->ReadRegisterAsUnsigned(eax_id, 0) & 0xffffffff;
683 raw_value |= (thread.GetRegisterContext()->ReadRegisterAsUnsigned(edx_id, 0) & 0xffffffff) << 32;
684 if (is_signed)
685 value.GetScalar() = (int64_t)raw_value;
686 else
687 value.GetScalar() = (uint64_t)raw_value;
688 break;
689 case 32:
690 if (is_signed)
691 value.GetScalar() = (int32_t)(thread.GetRegisterContext()->ReadRegisterAsUnsigned(eax_id, 0) & 0xffffffff);
692 else
693 value.GetScalar() = (uint32_t)(thread.GetRegisterContext()->ReadRegisterAsUnsigned(eax_id, 0) & 0xffffffff);
694 break;
695 case 16:
696 if (is_signed)
697 value.GetScalar() = (int16_t)(thread.GetRegisterContext()->ReadRegisterAsUnsigned(eax_id, 0) & 0xffff);
698 else
699 value.GetScalar() = (uint16_t)(thread.GetRegisterContext()->ReadRegisterAsUnsigned(eax_id, 0) & 0xffff);
700 break;
701 case 8:
702 if (is_signed)
703 value.GetScalar() = (int8_t)(thread.GetRegisterContext()->ReadRegisterAsUnsigned(eax_id, 0) & 0xff);
704 else
705 value.GetScalar() = (uint8_t)(thread.GetRegisterContext()->ReadRegisterAsUnsigned(eax_id, 0) & 0xff);
706 break;
707 }
708 }
709 else if (clang_type.IsPointerType ())
710 {
711 unsigned eax_id = reg_ctx->GetRegisterInfoByName("eax", 0)->kinds[eRegisterKindLLDB];
712 uint32_t ptr = thread.GetRegisterContext()->ReadRegisterAsUnsigned(eax_id, 0) & 0xffffffff;
713 value.GetScalar() = ptr;
714 }
715 else
716 {
717 // not handled yet
718 return return_valobj_sp;
719 }
720
721 // If we get here, we have a valid Value, so make our ValueObject out of it:
722
723 return_valobj_sp = ValueObjectConstResult::Create(thread.GetStackFrameAtIndex(0).get(),
724 value,
725 ConstString(""));
726 return return_valobj_sp;
727 }
728
729 bool
CreateFunctionEntryUnwindPlan(UnwindPlan & unwind_plan)730 ABIMacOSX_i386::CreateFunctionEntryUnwindPlan (UnwindPlan &unwind_plan)
731 {
732 unwind_plan.Clear();
733 unwind_plan.SetRegisterKind (eRegisterKindDWARF);
734
735 uint32_t sp_reg_num = dwarf_esp;
736 uint32_t pc_reg_num = dwarf_eip;
737
738 UnwindPlan::RowSP row(new UnwindPlan::Row);
739 row->SetCFARegister (sp_reg_num);
740 row->SetCFAOffset (4);
741 row->SetRegisterLocationToAtCFAPlusOffset(pc_reg_num, -4, false);
742 unwind_plan.AppendRow (row);
743 unwind_plan.SetSourceName ("i386 at-func-entry default");
744 unwind_plan.SetSourcedFromCompiler (eLazyBoolNo);
745 return true;
746 }
747
748 bool
CreateDefaultUnwindPlan(UnwindPlan & unwind_plan)749 ABIMacOSX_i386::CreateDefaultUnwindPlan (UnwindPlan &unwind_plan)
750 {
751 unwind_plan.Clear ();
752 unwind_plan.SetRegisterKind (eRegisterKindDWARF);
753
754 uint32_t fp_reg_num = dwarf_ebp;
755 uint32_t sp_reg_num = dwarf_esp;
756 uint32_t pc_reg_num = dwarf_eip;
757
758 UnwindPlan::RowSP row(new UnwindPlan::Row);
759 const int32_t ptr_size = 4;
760
761 row->SetCFARegister (fp_reg_num);
762 row->SetCFAOffset (2 * ptr_size);
763 row->SetOffset (0);
764
765 row->SetRegisterLocationToAtCFAPlusOffset(fp_reg_num, ptr_size * -2, true);
766 row->SetRegisterLocationToAtCFAPlusOffset(pc_reg_num, ptr_size * -1, true);
767 row->SetRegisterLocationToIsCFAPlusOffset(sp_reg_num, 0, true);
768
769 unwind_plan.AppendRow (row);
770 unwind_plan.SetSourceName ("i386 default unwind plan");
771 unwind_plan.SetSourcedFromCompiler (eLazyBoolNo);
772 unwind_plan.SetUnwindPlanValidAtAllInstructions (eLazyBoolNo);
773 return true;
774 }
775
776 bool
RegisterIsVolatile(const RegisterInfo * reg_info)777 ABIMacOSX_i386::RegisterIsVolatile (const RegisterInfo *reg_info)
778 {
779 return !RegisterIsCalleeSaved (reg_info);
780 }
781
782 // v. http://developer.apple.com/library/mac/#documentation/developertools/Conceptual/LowLevelABI/130-IA-32_Function_Calling_Conventions/IA32.html#//apple_ref/doc/uid/TP40002492-SW4
783
784 bool
RegisterIsCalleeSaved(const RegisterInfo * reg_info)785 ABIMacOSX_i386::RegisterIsCalleeSaved (const RegisterInfo *reg_info)
786 {
787 if (reg_info)
788 {
789 // Saved registers are ebx, ebp, esi, edi, esp, eip
790 const char *name = reg_info->name;
791 if (name[0] == 'e')
792 {
793 switch (name[1])
794 {
795 case 'b':
796 if (name[2] == 'x' || name[2] == 'p')
797 return name[3] == '\0';
798 break;
799 case 'd':
800 if (name[2] == 'i')
801 return name[3] == '\0';
802 break;
803 case 'i':
804 if (name[2] == 'p')
805 return name[3] == '\0';
806 break;
807 case 's':
808 if (name[2] == 'i' || name[2] == 'p')
809 return name[3] == '\0';
810 break;
811 }
812 }
813 if (name[0] == 's' && name[1] == 'p' && name[2] == '\0') // sp
814 return true;
815 if (name[0] == 'f' && name[1] == 'p' && name[2] == '\0') // fp
816 return true;
817 if (name[0] == 'p' && name[1] == 'c' && name[2] == '\0') // pc
818 return true;
819 }
820 return false;
821 }
822
823 void
Initialize()824 ABIMacOSX_i386::Initialize()
825 {
826 PluginManager::RegisterPlugin (GetPluginNameStatic(),
827 "Mac OS X ABI for i386 targets",
828 CreateInstance);
829 }
830
831 void
Terminate()832 ABIMacOSX_i386::Terminate()
833 {
834 PluginManager::UnregisterPlugin (CreateInstance);
835 }
836
837 lldb_private::ConstString
GetPluginNameStatic()838 ABIMacOSX_i386::GetPluginNameStatic ()
839 {
840 static ConstString g_short_name("abi.macosx-i386");
841 return g_short_name;
842
843 }
844
845 //------------------------------------------------------------------
846 // PluginInterface protocol
847 //------------------------------------------------------------------
848 lldb_private::ConstString
GetPluginName()849 ABIMacOSX_i386::GetPluginName()
850 {
851 return GetPluginNameStatic();
852 }
853
854 uint32_t
GetPluginVersion()855 ABIMacOSX_i386::GetPluginVersion()
856 {
857 return 1;
858 }
859
860