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,addr_t * arg1_ptr,addr_t * arg2_ptr,addr_t * arg3_ptr,addr_t * arg4_ptr,addr_t * arg5_ptr,addr_t * arg6_ptr) const249 ABIMacOSX_i386::PrepareTrivialCall (Thread &thread,
250 addr_t sp,
251 addr_t func_addr,
252 addr_t return_addr,
253 addr_t *arg1_ptr,
254 addr_t *arg2_ptr,
255 addr_t *arg3_ptr,
256 addr_t *arg4_ptr,
257 addr_t *arg5_ptr,
258 addr_t *arg6_ptr) const
259 {
260 RegisterContext *reg_ctx = thread.GetRegisterContext().get();
261 if (!reg_ctx)
262 return false;
263 uint32_t pc_reg_num = reg_ctx->ConvertRegisterKindToRegisterNumber (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_PC);
264 uint32_t sp_reg_num = reg_ctx->ConvertRegisterKindToRegisterNumber (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_SP);
265
266 // When writing a register value down to memory, the register info used
267 // to write memory just needs to have the correct size of a 32 bit register,
268 // the actual register it pertains to is not important, just the size needs
269 // to be correct. Here we use "eax"...
270 const RegisterInfo *reg_info_32 = reg_ctx->GetRegisterInfoByName("eax");
271 if (!reg_info_32)
272 return false; // TODO this should actually never happen
273
274 // Make room for the argument(s) on the stack
275
276 Error error;
277 RegisterValue reg_value;
278
279 // Write any arguments onto the stack
280 if (arg1_ptr)
281 {
282 sp -= 4;
283 if (arg2_ptr)
284 {
285 sp -= 4;
286 if (arg3_ptr)
287 {
288 sp -= 4;
289 if (arg4_ptr)
290 {
291 sp -= 4;
292 if (arg5_ptr)
293 {
294 sp -= 4;
295 if (arg6_ptr)
296 {
297 sp -= 4;
298 }
299 }
300 }
301 }
302 }
303 }
304
305 // Align the SP
306 sp &= ~(16ull-1ull); // 16-byte alignment
307
308 if (arg1_ptr)
309 {
310 reg_value.SetUInt32(*arg1_ptr);
311 error = reg_ctx->WriteRegisterValueToMemory (reg_info_32,
312 sp,
313 reg_info_32->byte_size,
314 reg_value);
315 if (error.Fail())
316 return false;
317
318 if (arg2_ptr)
319 {
320 reg_value.SetUInt32(*arg2_ptr);
321 // The register info used to write memory just needs to have the correct
322 // size of a 32 bit register, the actual register it pertains to is not
323 // important, just the size needs to be correct. Here we use "eax"...
324 error = reg_ctx->WriteRegisterValueToMemory (reg_info_32,
325 sp + 4,
326 reg_info_32->byte_size,
327 reg_value);
328 if (error.Fail())
329 return false;
330
331 if (arg3_ptr)
332 {
333 reg_value.SetUInt32(*arg3_ptr);
334 // The register info used to write memory just needs to have the correct
335 // size of a 32 bit register, the actual register it pertains to is not
336 // important, just the size needs to be correct. Here we use "eax"...
337 error = reg_ctx->WriteRegisterValueToMemory (reg_info_32,
338 sp + 8,
339 reg_info_32->byte_size,
340 reg_value);
341 if (error.Fail())
342 return false;
343
344 if (arg4_ptr)
345 {
346 reg_value.SetUInt32(*arg4_ptr);
347 // The register info used to write memory just needs to have the correct
348 // size of a 32 bit register, the actual register it pertains to is not
349 // important, just the size needs to be correct. Here we use "eax"...
350 error = reg_ctx->WriteRegisterValueToMemory (reg_info_32,
351 sp + 12,
352 reg_info_32->byte_size,
353 reg_value);
354 if (error.Fail())
355 return false;
356 if (arg5_ptr)
357 {
358 reg_value.SetUInt32(*arg5_ptr);
359 // The register info used to write memory just needs to have the correct
360 // size of a 32 bit register, the actual register it pertains to is not
361 // important, just the size needs to be correct. Here we use "eax"...
362 error = reg_ctx->WriteRegisterValueToMemory (reg_info_32,
363 sp + 16,
364 reg_info_32->byte_size,
365 reg_value);
366 if (error.Fail())
367 return false;
368 if (arg6_ptr)
369 {
370 reg_value.SetUInt32(*arg6_ptr);
371 // The register info used to write memory just needs to have the correct
372 // size of a 32 bit register, the actual register it pertains to is not
373 // important, just the size needs to be correct. Here we use "eax"...
374 error = reg_ctx->WriteRegisterValueToMemory (reg_info_32,
375 sp + 20,
376 reg_info_32->byte_size,
377 reg_value);
378 if (error.Fail())
379 return false;
380 }
381 }
382 }
383 }
384 }
385 }
386
387
388 // The return address is pushed onto the stack (yes after we just set the
389 // alignment above!).
390 sp -= 4;
391 reg_value.SetUInt32(return_addr);
392 error = reg_ctx->WriteRegisterValueToMemory (reg_info_32,
393 sp,
394 reg_info_32->byte_size,
395 reg_value);
396 if (error.Fail())
397 return false;
398
399 // %esp is set to the actual stack value.
400
401 if (!reg_ctx->WriteRegisterFromUnsigned (sp_reg_num, sp))
402 return false;
403
404 // %eip is set to the address of the called function.
405
406 if (!reg_ctx->WriteRegisterFromUnsigned (pc_reg_num, func_addr))
407 return false;
408
409 return true;
410 }
411
412 bool
PrepareNormalCall(Thread & thread,addr_t sp,addr_t func_addr,addr_t return_addr,ValueList & args) const413 ABIMacOSX_i386::PrepareNormalCall (Thread &thread,
414 addr_t sp,
415 addr_t func_addr,
416 addr_t return_addr,
417 ValueList &args) const
418 {
419 ExecutionContext exe_ctx (thread.shared_from_this());
420 RegisterContext *reg_ctx = thread.GetRegisterContext().get();
421 if (!reg_ctx)
422 return false;
423
424 Process *process = exe_ctx.GetProcessPtr();
425 Error error;
426 uint32_t fp_reg_num = reg_ctx->ConvertRegisterKindToRegisterNumber (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_FP);
427 uint32_t pc_reg_num = reg_ctx->ConvertRegisterKindToRegisterNumber (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_PC);
428 uint32_t sp_reg_num = reg_ctx->ConvertRegisterKindToRegisterNumber (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_SP);
429
430 // Do the argument layout
431
432 std::vector <uint32_t> argLayout; // 4-byte chunks, as discussed in the ABI Function Call Guide
433
434 size_t numArgs = args.GetSize();
435 size_t index;
436
437 for (index = 0; index < numArgs; ++index)
438 {
439 Value *val = args.GetValueAtIndex(index);
440
441 if (!val)
442 return false;
443
444 switch (val->GetValueType())
445 {
446 case Value::eValueTypeScalar:
447 {
448 Scalar &scalar = val->GetScalar();
449 switch (scalar.GetType())
450 {
451 case Scalar::e_void:
452 return false;
453 case Scalar::e_sint:
454 case Scalar::e_uint:
455 case Scalar::e_slong:
456 case Scalar::e_ulong:
457 case Scalar::e_slonglong:
458 case Scalar::e_ulonglong:
459 {
460 uint64_t data = scalar.ULongLong();
461
462 switch (scalar.GetByteSize())
463 {
464 default:
465 return false;
466 case 1:
467 argLayout.push_back((uint32_t)(data & 0xffull));
468 break;
469 case 2:
470 argLayout.push_back((uint32_t)(data & 0xffffull));
471 break;
472 case 4:
473 argLayout.push_back((uint32_t)(data & 0xffffffffull));
474 break;
475 case 8:
476 argLayout.push_back((uint32_t)(data & 0xffffffffull));
477 argLayout.push_back((uint32_t)(data >> 32));
478 break;
479 }
480 }
481 break;
482 case Scalar::e_float:
483 {
484 float data = scalar.Float();
485 uint32_t dataRaw = *((uint32_t*)(&data));
486 argLayout.push_back(dataRaw);
487 }
488 break;
489 case Scalar::e_double:
490 {
491 double data = scalar.Double();
492 uint32_t *dataRaw = ((uint32_t*)(&data));
493 argLayout.push_back(dataRaw[0]);
494 argLayout.push_back(dataRaw[1]);
495 }
496 break;
497 case Scalar::e_long_double:
498 {
499 long double data = scalar.Double();
500 uint32_t *dataRaw = ((uint32_t*)(&data));
501 while ((argLayout.size() * 4) & 0xf)
502 argLayout.push_back(0);
503 argLayout.push_back(dataRaw[0]);
504 argLayout.push_back(dataRaw[1]);
505 argLayout.push_back(dataRaw[2]);
506 argLayout.push_back(dataRaw[3]);
507 }
508 break;
509 }
510 }
511 break;
512 case Value::eValueTypeHostAddress:
513 {
514 ClangASTType clang_type (val->GetClangType());
515 if (clang_type)
516 {
517 uint32_t cstr_length = 0;
518 if (clang_type.IsCStringType (cstr_length))
519 {
520 const char *cstr = (const char*)val->GetScalar().ULongLong();
521 cstr_length = strlen(cstr);
522
523 // Push the string onto the stack immediately.
524
525 sp -= (cstr_length + 1);
526
527 if (process->WriteMemory(sp, cstr, cstr_length + 1, error) != (cstr_length + 1))
528 return false;
529
530 // Put the address of the string into the argument array.
531
532 argLayout.push_back((uint32_t)(sp & 0xffffffff));
533 }
534 else
535 {
536 return false;
537 }
538 }
539 break;
540 }
541 break;
542 case Value::eValueTypeFileAddress:
543 case Value::eValueTypeLoadAddress:
544 default:
545 return false;
546 }
547 }
548
549 // Make room for the arguments on the stack
550
551 sp -= 4 * argLayout.size();
552
553 // Align the SP
554
555 sp &= ~(16ull-1ull); // 16-byte alignment
556
557 // Write the arguments on the stack
558
559 size_t numChunks = argLayout.size();
560
561 for (index = 0; index < numChunks; ++index)
562 if (process->WriteMemory(sp + (index * 4), &argLayout[index], sizeof(uint32_t), error) != sizeof(uint32_t))
563 return false;
564
565 // The return address is pushed onto the stack.
566
567 sp -= 4;
568 uint32_t returnAddressU32 = return_addr;
569 if (process->WriteMemory (sp, &returnAddressU32, sizeof(returnAddressU32), error) != sizeof(returnAddressU32))
570 return false;
571
572 // %esp is set to the actual stack value.
573
574 if (!reg_ctx->WriteRegisterFromUnsigned(sp_reg_num, sp))
575 return false;
576
577 // %ebp is set to a fake value, in our case 0x0x00000000
578
579 if (!reg_ctx->WriteRegisterFromUnsigned(fp_reg_num, 0x00000000))
580 return false;
581
582 // %eip is set to the address of the called function.
583
584 if (!reg_ctx->WriteRegisterFromUnsigned(pc_reg_num, func_addr))
585 return false;
586
587 return true;
588 }
589
590 static bool
ReadIntegerArgument(Scalar & scalar,unsigned int bit_width,bool is_signed,Process * process,addr_t & current_stack_argument)591 ReadIntegerArgument (Scalar &scalar,
592 unsigned int bit_width,
593 bool is_signed,
594 Process *process,
595 addr_t ¤t_stack_argument)
596 {
597
598 uint32_t byte_size = (bit_width + (8-1))/8;
599 Error error;
600 if (process->ReadScalarIntegerFromMemory(current_stack_argument, byte_size, is_signed, scalar, error))
601 {
602 current_stack_argument += byte_size;
603 return true;
604 }
605 return false;
606 }
607
608 bool
GetArgumentValues(Thread & thread,ValueList & values) const609 ABIMacOSX_i386::GetArgumentValues (Thread &thread,
610 ValueList &values) const
611 {
612 unsigned int num_values = values.GetSize();
613 unsigned int value_index;
614
615 // Get the pointer to the first stack argument so we have a place to start
616 // when reading data
617
618 RegisterContext *reg_ctx = thread.GetRegisterContext().get();
619
620 if (!reg_ctx)
621 return false;
622
623 addr_t sp = reg_ctx->GetSP(0);
624
625 if (!sp)
626 return false;
627
628 addr_t current_stack_argument = sp + 4; // jump over return address
629
630 for (value_index = 0;
631 value_index < num_values;
632 ++value_index)
633 {
634 Value *value = values.GetValueAtIndex(value_index);
635
636 if (!value)
637 return false;
638
639 // We currently only support extracting values with Clang QualTypes.
640 // Do we care about others?
641 ClangASTType clang_type (value->GetClangType());
642 if (clang_type)
643 {
644 bool is_signed;
645
646 if (clang_type.IsIntegerType (is_signed))
647 {
648 ReadIntegerArgument(value->GetScalar(),
649 clang_type.GetBitSize(),
650 is_signed,
651 thread.GetProcess().get(),
652 current_stack_argument);
653 }
654 else if (clang_type.IsPointerType())
655 {
656 ReadIntegerArgument(value->GetScalar(),
657 clang_type.GetBitSize(),
658 false,
659 thread.GetProcess().get(),
660 current_stack_argument);
661 }
662 }
663 }
664
665 return true;
666 }
667
668 Error
SetReturnValueObject(lldb::StackFrameSP & frame_sp,lldb::ValueObjectSP & new_value_sp)669 ABIMacOSX_i386::SetReturnValueObject(lldb::StackFrameSP &frame_sp, lldb::ValueObjectSP &new_value_sp)
670 {
671 Error error;
672 if (!new_value_sp)
673 {
674 error.SetErrorString("Empty value object for return value.");
675 return error;
676 }
677
678 ClangASTType clang_type = new_value_sp->GetClangType();
679 if (!clang_type)
680 {
681 error.SetErrorString ("Null clang type for return value.");
682 return error;
683 }
684
685 Thread *thread = frame_sp->GetThread().get();
686
687 bool is_signed;
688 uint32_t count;
689 bool is_complex;
690
691 RegisterContext *reg_ctx = thread->GetRegisterContext().get();
692
693 bool set_it_simple = false;
694 if (clang_type.IsIntegerType (is_signed) || clang_type.IsPointerType())
695 {
696 DataExtractor data;
697 size_t num_bytes = new_value_sp->GetData(data);
698 lldb::offset_t offset = 0;
699 if (num_bytes <= 8)
700 {
701 const RegisterInfo *eax_info = reg_ctx->GetRegisterInfoByName("eax", 0);
702 if (num_bytes <= 4)
703 {
704 uint32_t raw_value = data.GetMaxU32(&offset, num_bytes);
705
706 if (reg_ctx->WriteRegisterFromUnsigned (eax_info, raw_value))
707 set_it_simple = true;
708 }
709 else
710 {
711 uint32_t raw_value = data.GetMaxU32(&offset, 4);
712
713 if (reg_ctx->WriteRegisterFromUnsigned (eax_info, raw_value))
714 {
715 const RegisterInfo *edx_info = reg_ctx->GetRegisterInfoByName("edx", 0);
716 uint32_t raw_value = data.GetMaxU32(&offset, num_bytes - offset);
717
718 if (reg_ctx->WriteRegisterFromUnsigned (edx_info, raw_value))
719 set_it_simple = true;
720 }
721 }
722 }
723 else
724 {
725 error.SetErrorString("We don't support returning longer than 64 bit integer values at present.");
726 }
727 }
728 else if (clang_type.IsFloatingPointType (count, is_complex))
729 {
730 if (is_complex)
731 error.SetErrorString ("We don't support returning complex values at present");
732 else
733 error.SetErrorString ("We don't support returning float values at present");
734 }
735
736 if (!set_it_simple)
737 error.SetErrorString ("We only support setting simple integer return types at present.");
738
739 return error;
740 }
741
742 ValueObjectSP
GetReturnValueObjectImpl(Thread & thread,ClangASTType & clang_type) const743 ABIMacOSX_i386::GetReturnValueObjectImpl (Thread &thread,
744 ClangASTType &clang_type) const
745 {
746 Value value;
747 ValueObjectSP return_valobj_sp;
748
749 if (!clang_type)
750 return return_valobj_sp;
751
752 //value.SetContext (Value::eContextTypeClangType, clang_type.GetOpaqueQualType());
753 value.SetClangType (clang_type);
754
755 RegisterContext *reg_ctx = thread.GetRegisterContext().get();
756 if (!reg_ctx)
757 return return_valobj_sp;
758
759 bool is_signed;
760
761 if (clang_type.IsIntegerType (is_signed))
762 {
763 size_t bit_width = clang_type.GetBitSize();
764
765 unsigned eax_id = reg_ctx->GetRegisterInfoByName("eax", 0)->kinds[eRegisterKindLLDB];
766 unsigned edx_id = reg_ctx->GetRegisterInfoByName("edx", 0)->kinds[eRegisterKindLLDB];
767
768 switch (bit_width)
769 {
770 default:
771 case 128:
772 // Scalar can't hold 128-bit literals, so we don't handle this
773 return return_valobj_sp;
774 case 64:
775 uint64_t raw_value;
776 raw_value = thread.GetRegisterContext()->ReadRegisterAsUnsigned(eax_id, 0) & 0xffffffff;
777 raw_value |= (thread.GetRegisterContext()->ReadRegisterAsUnsigned(edx_id, 0) & 0xffffffff) << 32;
778 if (is_signed)
779 value.GetScalar() = (int64_t)raw_value;
780 else
781 value.GetScalar() = (uint64_t)raw_value;
782 break;
783 case 32:
784 if (is_signed)
785 value.GetScalar() = (int32_t)(thread.GetRegisterContext()->ReadRegisterAsUnsigned(eax_id, 0) & 0xffffffff);
786 else
787 value.GetScalar() = (uint32_t)(thread.GetRegisterContext()->ReadRegisterAsUnsigned(eax_id, 0) & 0xffffffff);
788 break;
789 case 16:
790 if (is_signed)
791 value.GetScalar() = (int16_t)(thread.GetRegisterContext()->ReadRegisterAsUnsigned(eax_id, 0) & 0xffff);
792 else
793 value.GetScalar() = (uint16_t)(thread.GetRegisterContext()->ReadRegisterAsUnsigned(eax_id, 0) & 0xffff);
794 break;
795 case 8:
796 if (is_signed)
797 value.GetScalar() = (int8_t)(thread.GetRegisterContext()->ReadRegisterAsUnsigned(eax_id, 0) & 0xff);
798 else
799 value.GetScalar() = (uint8_t)(thread.GetRegisterContext()->ReadRegisterAsUnsigned(eax_id, 0) & 0xff);
800 break;
801 }
802 }
803 else if (clang_type.IsPointerType ())
804 {
805 unsigned eax_id = reg_ctx->GetRegisterInfoByName("eax", 0)->kinds[eRegisterKindLLDB];
806 uint32_t ptr = thread.GetRegisterContext()->ReadRegisterAsUnsigned(eax_id, 0) & 0xffffffff;
807 value.GetScalar() = ptr;
808 }
809 else
810 {
811 // not handled yet
812 return return_valobj_sp;
813 }
814
815 // If we get here, we have a valid Value, so make our ValueObject out of it:
816
817 return_valobj_sp = ValueObjectConstResult::Create(thread.GetStackFrameAtIndex(0).get(),
818 value,
819 ConstString(""));
820 return return_valobj_sp;
821 }
822
823 bool
CreateFunctionEntryUnwindPlan(UnwindPlan & unwind_plan)824 ABIMacOSX_i386::CreateFunctionEntryUnwindPlan (UnwindPlan &unwind_plan)
825 {
826 uint32_t reg_kind = unwind_plan.GetRegisterKind();
827 uint32_t sp_reg_num = LLDB_INVALID_REGNUM;
828 uint32_t pc_reg_num = LLDB_INVALID_REGNUM;
829
830 switch (reg_kind)
831 {
832 case eRegisterKindDWARF:
833 sp_reg_num = dwarf_esp;
834 pc_reg_num = dwarf_eip;
835 break;
836
837 case eRegisterKindGCC:
838 sp_reg_num = gcc_esp;
839 pc_reg_num = gcc_eip;
840 break;
841
842 case eRegisterKindGDB:
843 sp_reg_num = gdb_esp;
844 pc_reg_num = gdb_eip;
845 break;
846
847 case eRegisterKindGeneric:
848 sp_reg_num = LLDB_REGNUM_GENERIC_SP;
849 pc_reg_num = LLDB_REGNUM_GENERIC_PC;
850 break;
851 }
852
853 if (sp_reg_num == LLDB_INVALID_REGNUM ||
854 pc_reg_num == LLDB_INVALID_REGNUM)
855 return false;
856
857 UnwindPlan::RowSP row(new UnwindPlan::Row);
858 row->SetCFARegister (sp_reg_num);
859 row->SetCFAOffset (4);
860 row->SetRegisterLocationToAtCFAPlusOffset(pc_reg_num, -4, false);
861 unwind_plan.AppendRow (row);
862 unwind_plan.SetSourceName ("i386 at-func-entry default");
863 unwind_plan.SetSourcedFromCompiler (eLazyBoolNo);
864 return true;
865 }
866
867 bool
CreateDefaultUnwindPlan(UnwindPlan & unwind_plan)868 ABIMacOSX_i386::CreateDefaultUnwindPlan (UnwindPlan &unwind_plan)
869 {
870 uint32_t fp_reg_num = dwarf_ebp;
871 uint32_t sp_reg_num = dwarf_esp;
872 uint32_t pc_reg_num = dwarf_eip;
873
874 UnwindPlan::RowSP row(new UnwindPlan::Row);
875 const int32_t ptr_size = 4;
876
877 unwind_plan.Clear ();
878 unwind_plan.SetRegisterKind (eRegisterKindDWARF);
879 row->SetCFARegister (fp_reg_num);
880 row->SetCFAOffset (2 * ptr_size);
881 row->SetOffset (0);
882
883 row->SetRegisterLocationToAtCFAPlusOffset(fp_reg_num, ptr_size * -2, true);
884 row->SetRegisterLocationToAtCFAPlusOffset(pc_reg_num, ptr_size * -1, true);
885 row->SetRegisterLocationToAtCFAPlusOffset(sp_reg_num, ptr_size * 0, true);
886
887 unwind_plan.AppendRow (row);
888 unwind_plan.SetSourceName ("i386 default unwind plan");
889 unwind_plan.SetSourcedFromCompiler (eLazyBoolNo);
890 unwind_plan.SetUnwindPlanValidAtAllInstructions (eLazyBoolNo);
891 return true;
892 }
893
894 bool
RegisterIsVolatile(const RegisterInfo * reg_info)895 ABIMacOSX_i386::RegisterIsVolatile (const RegisterInfo *reg_info)
896 {
897 return !RegisterIsCalleeSaved (reg_info);
898 }
899
900 // 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
901
902 bool
RegisterIsCalleeSaved(const RegisterInfo * reg_info)903 ABIMacOSX_i386::RegisterIsCalleeSaved (const RegisterInfo *reg_info)
904 {
905 if (reg_info)
906 {
907 // Saved registers are ebx, ebp, esi, edi, esp, eip
908 const char *name = reg_info->name;
909 if (name[0] == 'e')
910 {
911 switch (name[1])
912 {
913 case 'b':
914 if (name[2] == 'x' || name[2] == 'p')
915 return name[3] == '\0';
916 break;
917 case 'd':
918 if (name[2] == 'i')
919 return name[3] == '\0';
920 break;
921 case 'i':
922 if (name[2] == 'p')
923 return name[3] == '\0';
924 break;
925 case 's':
926 if (name[2] == 'i' || name[2] == 'p')
927 return name[3] == '\0';
928 break;
929 }
930 }
931 if (name[0] == 's' && name[1] == 'p' && name[2] == '\0') // sp
932 return true;
933 if (name[0] == 'f' && name[1] == 'p' && name[2] == '\0') // fp
934 return true;
935 if (name[0] == 'p' && name[1] == 'c' && name[2] == '\0') // pc
936 return true;
937 }
938 return false;
939 }
940
941 void
Initialize()942 ABIMacOSX_i386::Initialize()
943 {
944 PluginManager::RegisterPlugin (GetPluginNameStatic(),
945 "Mac OS X ABI for i386 targets",
946 CreateInstance);
947 }
948
949 void
Terminate()950 ABIMacOSX_i386::Terminate()
951 {
952 PluginManager::UnregisterPlugin (CreateInstance);
953 }
954
955 lldb_private::ConstString
GetPluginNameStatic()956 ABIMacOSX_i386::GetPluginNameStatic ()
957 {
958 static ConstString g_short_name("abi.macosx-i386");
959 return g_short_name;
960
961 }
962
963 //------------------------------------------------------------------
964 // PluginInterface protocol
965 //------------------------------------------------------------------
966 lldb_private::ConstString
GetPluginName()967 ABIMacOSX_i386::GetPluginName()
968 {
969 return GetPluginNameStatic();
970 }
971
972 uint32_t
GetPluginVersion()973 ABIMacOSX_i386::GetPluginVersion()
974 {
975 return 1;
976 }
977
978