1 //===-- ABIMacOSX_arm.cpp ---------------------------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "ABIMacOSX_arm.h"
16 // Other libraries and framework includes
17 #include "llvm/ADT/STLExtras.h"
18 #include "llvm/ADT/Triple.h"
21 #include "lldb/Core/Module.h"
22 #include "lldb/Core/PluginManager.h"
23 #include "lldb/Core/RegisterValue.h"
24 #include "lldb/Core/Scalar.h"
25 #include "lldb/Core/Value.h"
26 #include "lldb/Core/ValueObjectConstResult.h"
27 #include "lldb/Symbol/UnwindPlan.h"
28 #include "lldb/Target/Process.h"
29 #include "lldb/Target/RegisterContext.h"
30 #include "lldb/Target/Target.h"
31 #include "lldb/Target/Thread.h"
32 #include "lldb/Utility/ConstString.h"
33 #include "lldb/Utility/Status.h"
35 #include "Plugins/Process/Utility/ARMDefines.h"
36 #include "Utility/ARM_DWARF_Registers.h"
37 #include "Utility/ARM_ehframe_Registers.h"
40 using namespace lldb_private;
42 static RegisterInfo g_register_infos[] = {
43 // NAME ALT SZ OFF ENCODING FORMAT EH_FRAME
44 // DWARF GENERIC PROCESS PLUGIN
46 // ========== ======= == === ============= ============
47 // ======================= =================== ===========================
48 // ======================= ======================
55 {ehframe_r0, dwarf_r0, LLDB_REGNUM_GENERIC_ARG1, LLDB_INVALID_REGNUM,
67 {ehframe_r1, dwarf_r1, LLDB_REGNUM_GENERIC_ARG2, LLDB_INVALID_REGNUM,
79 {ehframe_r2, dwarf_r2, LLDB_REGNUM_GENERIC_ARG3, LLDB_INVALID_REGNUM,
91 {ehframe_r3, dwarf_r3, LLDB_REGNUM_GENERIC_ARG4, LLDB_INVALID_REGNUM,
103 {ehframe_r4, dwarf_r4, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
104 LLDB_INVALID_REGNUM},
115 {ehframe_r5, dwarf_r5, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
116 LLDB_INVALID_REGNUM},
127 {ehframe_r6, dwarf_r6, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
128 LLDB_INVALID_REGNUM},
139 {ehframe_r7, dwarf_r7, LLDB_REGNUM_GENERIC_FP, LLDB_INVALID_REGNUM,
140 LLDB_INVALID_REGNUM},
151 {ehframe_r8, dwarf_r8, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
152 LLDB_INVALID_REGNUM},
163 {ehframe_r9, dwarf_r9, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
164 LLDB_INVALID_REGNUM},
175 {ehframe_r10, dwarf_r10, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
176 LLDB_INVALID_REGNUM},
187 {ehframe_r11, dwarf_r11, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
188 LLDB_INVALID_REGNUM},
199 {ehframe_r12, dwarf_r12, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
200 LLDB_INVALID_REGNUM},
211 {ehframe_sp, dwarf_sp, LLDB_REGNUM_GENERIC_SP, LLDB_INVALID_REGNUM,
212 LLDB_INVALID_REGNUM},
223 {ehframe_lr, dwarf_lr, LLDB_REGNUM_GENERIC_RA, LLDB_INVALID_REGNUM,
224 LLDB_INVALID_REGNUM},
235 {ehframe_pc, dwarf_pc, LLDB_REGNUM_GENERIC_PC, LLDB_INVALID_REGNUM,
236 LLDB_INVALID_REGNUM},
247 {ehframe_cpsr, dwarf_cpsr, LLDB_REGNUM_GENERIC_FLAGS, LLDB_INVALID_REGNUM,
248 LLDB_INVALID_REGNUM},
259 {LLDB_INVALID_REGNUM, dwarf_s0, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
260 LLDB_INVALID_REGNUM},
271 {LLDB_INVALID_REGNUM, dwarf_s1, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
272 LLDB_INVALID_REGNUM},
283 {LLDB_INVALID_REGNUM, dwarf_s2, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
284 LLDB_INVALID_REGNUM},
295 {LLDB_INVALID_REGNUM, dwarf_s3, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
296 LLDB_INVALID_REGNUM},
307 {LLDB_INVALID_REGNUM, dwarf_s4, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
308 LLDB_INVALID_REGNUM},
319 {LLDB_INVALID_REGNUM, dwarf_s5, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
320 LLDB_INVALID_REGNUM},
331 {LLDB_INVALID_REGNUM, dwarf_s6, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
332 LLDB_INVALID_REGNUM},
343 {LLDB_INVALID_REGNUM, dwarf_s7, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
344 LLDB_INVALID_REGNUM},
355 {LLDB_INVALID_REGNUM, dwarf_s8, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
356 LLDB_INVALID_REGNUM},
367 {LLDB_INVALID_REGNUM, dwarf_s9, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
368 LLDB_INVALID_REGNUM},
379 {LLDB_INVALID_REGNUM, dwarf_s10, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
380 LLDB_INVALID_REGNUM},
391 {LLDB_INVALID_REGNUM, dwarf_s11, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
392 LLDB_INVALID_REGNUM},
403 {LLDB_INVALID_REGNUM, dwarf_s12, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
404 LLDB_INVALID_REGNUM},
415 {LLDB_INVALID_REGNUM, dwarf_s13, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
416 LLDB_INVALID_REGNUM},
427 {LLDB_INVALID_REGNUM, dwarf_s14, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
428 LLDB_INVALID_REGNUM},
439 {LLDB_INVALID_REGNUM, dwarf_s15, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
440 LLDB_INVALID_REGNUM},
451 {LLDB_INVALID_REGNUM, dwarf_s16, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
452 LLDB_INVALID_REGNUM},
463 {LLDB_INVALID_REGNUM, dwarf_s17, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
464 LLDB_INVALID_REGNUM},
475 {LLDB_INVALID_REGNUM, dwarf_s18, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
476 LLDB_INVALID_REGNUM},
487 {LLDB_INVALID_REGNUM, dwarf_s19, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
488 LLDB_INVALID_REGNUM},
499 {LLDB_INVALID_REGNUM, dwarf_s20, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
500 LLDB_INVALID_REGNUM},
511 {LLDB_INVALID_REGNUM, dwarf_s21, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
512 LLDB_INVALID_REGNUM},
523 {LLDB_INVALID_REGNUM, dwarf_s22, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
524 LLDB_INVALID_REGNUM},
535 {LLDB_INVALID_REGNUM, dwarf_s23, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
536 LLDB_INVALID_REGNUM},
547 {LLDB_INVALID_REGNUM, dwarf_s24, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
548 LLDB_INVALID_REGNUM},
559 {LLDB_INVALID_REGNUM, dwarf_s25, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
560 LLDB_INVALID_REGNUM},
571 {LLDB_INVALID_REGNUM, dwarf_s26, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
572 LLDB_INVALID_REGNUM},
583 {LLDB_INVALID_REGNUM, dwarf_s27, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
584 LLDB_INVALID_REGNUM},
595 {LLDB_INVALID_REGNUM, dwarf_s28, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
596 LLDB_INVALID_REGNUM},
607 {LLDB_INVALID_REGNUM, dwarf_s29, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
608 LLDB_INVALID_REGNUM},
619 {LLDB_INVALID_REGNUM, dwarf_s30, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
620 LLDB_INVALID_REGNUM},
631 {LLDB_INVALID_REGNUM, dwarf_s31, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
632 LLDB_INVALID_REGNUM},
643 {LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
644 LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM},
655 {LLDB_INVALID_REGNUM, dwarf_d0, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
656 LLDB_INVALID_REGNUM},
667 {LLDB_INVALID_REGNUM, dwarf_d1, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
668 LLDB_INVALID_REGNUM},
679 {LLDB_INVALID_REGNUM, dwarf_d2, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
680 LLDB_INVALID_REGNUM},
691 {LLDB_INVALID_REGNUM, dwarf_d3, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
692 LLDB_INVALID_REGNUM},
703 {LLDB_INVALID_REGNUM, dwarf_d4, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
704 LLDB_INVALID_REGNUM},
715 {LLDB_INVALID_REGNUM, dwarf_d5, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
716 LLDB_INVALID_REGNUM},
727 {LLDB_INVALID_REGNUM, dwarf_d6, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
728 LLDB_INVALID_REGNUM},
739 {LLDB_INVALID_REGNUM, dwarf_d7, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
740 LLDB_INVALID_REGNUM},
751 {LLDB_INVALID_REGNUM, dwarf_d8, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
752 LLDB_INVALID_REGNUM},
763 {LLDB_INVALID_REGNUM, dwarf_d9, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
764 LLDB_INVALID_REGNUM},
775 {LLDB_INVALID_REGNUM, dwarf_d10, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
776 LLDB_INVALID_REGNUM},
787 {LLDB_INVALID_REGNUM, dwarf_d11, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
788 LLDB_INVALID_REGNUM},
799 {LLDB_INVALID_REGNUM, dwarf_d12, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
800 LLDB_INVALID_REGNUM},
811 {LLDB_INVALID_REGNUM, dwarf_d13, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
812 LLDB_INVALID_REGNUM},
823 {LLDB_INVALID_REGNUM, dwarf_d14, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
824 LLDB_INVALID_REGNUM},
835 {LLDB_INVALID_REGNUM, dwarf_d15, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
836 LLDB_INVALID_REGNUM},
847 {LLDB_INVALID_REGNUM, dwarf_d16, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
848 LLDB_INVALID_REGNUM},
859 {LLDB_INVALID_REGNUM, dwarf_d17, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
860 LLDB_INVALID_REGNUM},
871 {LLDB_INVALID_REGNUM, dwarf_d18, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
872 LLDB_INVALID_REGNUM},
883 {LLDB_INVALID_REGNUM, dwarf_d19, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
884 LLDB_INVALID_REGNUM},
895 {LLDB_INVALID_REGNUM, dwarf_d20, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
896 LLDB_INVALID_REGNUM},
907 {LLDB_INVALID_REGNUM, dwarf_d21, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
908 LLDB_INVALID_REGNUM},
919 {LLDB_INVALID_REGNUM, dwarf_d22, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
920 LLDB_INVALID_REGNUM},
931 {LLDB_INVALID_REGNUM, dwarf_d23, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
932 LLDB_INVALID_REGNUM},
943 {LLDB_INVALID_REGNUM, dwarf_d24, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
944 LLDB_INVALID_REGNUM},
955 {LLDB_INVALID_REGNUM, dwarf_d25, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
956 LLDB_INVALID_REGNUM},
967 {LLDB_INVALID_REGNUM, dwarf_d26, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
968 LLDB_INVALID_REGNUM},
979 {LLDB_INVALID_REGNUM, dwarf_d27, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
980 LLDB_INVALID_REGNUM},
991 {LLDB_INVALID_REGNUM, dwarf_d28, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
992 LLDB_INVALID_REGNUM},
1003 {LLDB_INVALID_REGNUM, dwarf_d29, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
1004 LLDB_INVALID_REGNUM},
1015 {LLDB_INVALID_REGNUM, dwarf_d30, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
1016 LLDB_INVALID_REGNUM},
1027 {LLDB_INVALID_REGNUM, dwarf_d31, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
1028 LLDB_INVALID_REGNUM},
1039 {LLDB_INVALID_REGNUM, dwarf_r8_usr, LLDB_INVALID_REGNUM,
1040 LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM},
1051 {LLDB_INVALID_REGNUM, dwarf_r9_usr, LLDB_INVALID_REGNUM,
1052 LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM},
1063 {LLDB_INVALID_REGNUM, dwarf_r10_usr, LLDB_INVALID_REGNUM,
1064 LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM},
1075 {LLDB_INVALID_REGNUM, dwarf_r11_usr, LLDB_INVALID_REGNUM,
1076 LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM},
1087 {LLDB_INVALID_REGNUM, dwarf_r12_usr, LLDB_INVALID_REGNUM,
1088 LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM},
1099 {LLDB_INVALID_REGNUM, dwarf_r13_usr, LLDB_INVALID_REGNUM,
1100 LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM},
1111 {LLDB_INVALID_REGNUM, dwarf_r14_usr, LLDB_INVALID_REGNUM,
1112 LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM},
1123 {LLDB_INVALID_REGNUM, dwarf_r8_fiq, LLDB_INVALID_REGNUM,
1124 LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM},
1135 {LLDB_INVALID_REGNUM, dwarf_r9_fiq, LLDB_INVALID_REGNUM,
1136 LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM},
1147 {LLDB_INVALID_REGNUM, dwarf_r10_fiq, LLDB_INVALID_REGNUM,
1148 LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM},
1159 {LLDB_INVALID_REGNUM, dwarf_r11_fiq, LLDB_INVALID_REGNUM,
1160 LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM},
1171 {LLDB_INVALID_REGNUM, dwarf_r12_fiq, LLDB_INVALID_REGNUM,
1172 LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM},
1183 {LLDB_INVALID_REGNUM, dwarf_r13_fiq, LLDB_INVALID_REGNUM,
1184 LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM},
1195 {LLDB_INVALID_REGNUM, dwarf_r14_fiq, LLDB_INVALID_REGNUM,
1196 LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM},
1207 {LLDB_INVALID_REGNUM, dwarf_r13_irq, LLDB_INVALID_REGNUM,
1208 LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM},
1219 {LLDB_INVALID_REGNUM, dwarf_r14_irq, LLDB_INVALID_REGNUM,
1220 LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM},
1231 {LLDB_INVALID_REGNUM, dwarf_r13_abt, LLDB_INVALID_REGNUM,
1232 LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM},
1243 {LLDB_INVALID_REGNUM, dwarf_r14_abt, LLDB_INVALID_REGNUM,
1244 LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM},
1255 {LLDB_INVALID_REGNUM, dwarf_r13_und, LLDB_INVALID_REGNUM,
1256 LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM},
1267 {LLDB_INVALID_REGNUM, dwarf_r14_und, LLDB_INVALID_REGNUM,
1268 LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM},
1279 {LLDB_INVALID_REGNUM, dwarf_r13_svc, LLDB_INVALID_REGNUM,
1280 LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM},
1291 {LLDB_INVALID_REGNUM, dwarf_r14_svc, LLDB_INVALID_REGNUM,
1292 LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM},
1298 static const uint32_t k_num_register_infos =
1299 llvm::array_lengthof(g_register_infos);
1300 static bool g_register_info_names_constified = false;
1302 const lldb_private::RegisterInfo *
1303 ABIMacOSX_arm::GetRegisterInfoArray(uint32_t &count) {
1304 // Make the C-string names and alt_names for the register infos into const
1305 // C-string values by having the ConstString unique the names in the global
1306 // constant C-string pool.
1307 if (!g_register_info_names_constified) {
1308 g_register_info_names_constified = true;
1309 for (uint32_t i = 0; i < k_num_register_infos; ++i) {
1310 if (g_register_infos[i].name)
1311 g_register_infos[i].name =
1312 ConstString(g_register_infos[i].name).GetCString();
1313 if (g_register_infos[i].alt_name)
1314 g_register_infos[i].alt_name =
1315 ConstString(g_register_infos[i].alt_name).GetCString();
1318 count = k_num_register_infos;
1319 return g_register_infos;
1322 size_t ABIMacOSX_arm::GetRedZoneSize() const { return 0; }
1324 //------------------------------------------------------------------
1326 //------------------------------------------------------------------
1329 ABIMacOSX_arm::CreateInstance(ProcessSP process_sp, const ArchSpec &arch) {
1330 static ABISP g_abi_sp;
1331 const llvm::Triple::ArchType arch_type = arch.GetTriple().getArch();
1332 const llvm::Triple::VendorType vendor_type = arch.GetTriple().getVendor();
1334 if (vendor_type == llvm::Triple::Apple) {
1335 if ((arch_type == llvm::Triple::arm) ||
1336 (arch_type == llvm::Triple::thumb)) {
1338 g_abi_sp.reset(new ABIMacOSX_arm(process_sp));
1346 bool ABIMacOSX_arm::PrepareTrivialCall(Thread &thread, addr_t sp,
1347 addr_t function_addr, addr_t return_addr,
1348 llvm::ArrayRef<addr_t> args) const {
1349 RegisterContext *reg_ctx = thread.GetRegisterContext().get();
1353 const uint32_t pc_reg_num = reg_ctx->ConvertRegisterKindToRegisterNumber(
1354 eRegisterKindGeneric, LLDB_REGNUM_GENERIC_PC);
1355 const uint32_t sp_reg_num = reg_ctx->ConvertRegisterKindToRegisterNumber(
1356 eRegisterKindGeneric, LLDB_REGNUM_GENERIC_SP);
1357 const uint32_t ra_reg_num = reg_ctx->ConvertRegisterKindToRegisterNumber(
1358 eRegisterKindGeneric, LLDB_REGNUM_GENERIC_RA);
1360 RegisterValue reg_value;
1362 const char *reg_names[] = {"r0", "r1", "r2", "r3"};
1364 llvm::ArrayRef<addr_t>::iterator ai = args.begin(), ae = args.end();
1366 for (size_t i = 0; i < llvm::array_lengthof(reg_names); ++i) {
1370 reg_value.SetUInt32(*ai);
1371 if (!reg_ctx->WriteRegister(reg_ctx->GetRegisterInfoByName(reg_names[i]),
1379 // Spill onto the stack
1380 size_t num_stack_regs = ae - ai;
1382 sp -= (num_stack_regs * 4);
1383 // Keep the stack 16 byte aligned
1384 sp &= ~(16ull - 1ull);
1386 // just using arg1 to get the right size
1387 const RegisterInfo *reg_info = reg_ctx->GetRegisterInfo(
1388 eRegisterKindGeneric, LLDB_REGNUM_GENERIC_ARG1);
1390 addr_t arg_pos = sp;
1392 for (; ai != ae; ++ai) {
1393 reg_value.SetUInt32(*ai);
1395 ->WriteRegisterValueToMemory(reg_info, arg_pos,
1396 reg_info->byte_size, reg_value)
1399 arg_pos += reg_info->byte_size;
1403 TargetSP target_sp(thread.CalculateTarget());
1406 // Figure out if our return address is ARM or Thumb by using the
1407 // Address::GetCallableLoadAddress(Target*) which will figure out the ARM
1408 // thumb-ness and set the correct address bits for us.
1409 so_addr.SetLoadAddress(return_addr, target_sp.get());
1410 return_addr = so_addr.GetCallableLoadAddress(target_sp.get());
1412 // Set "lr" to the return address
1413 if (!reg_ctx->WriteRegisterFromUnsigned(ra_reg_num, return_addr))
1416 // If bit zero or 1 is set, this must be a thumb function, no need to figure
1417 // this out from the symbols.
1418 so_addr.SetLoadAddress(function_addr, target_sp.get());
1419 function_addr = so_addr.GetCallableLoadAddress(target_sp.get());
1421 const RegisterInfo *cpsr_reg_info = reg_ctx->GetRegisterInfoByName("cpsr");
1422 const uint32_t curr_cpsr = reg_ctx->ReadRegisterAsUnsigned(cpsr_reg_info, 0);
1424 // Make a new CPSR and mask out any Thumb IT (if/then) bits
1425 uint32_t new_cpsr = curr_cpsr & ~MASK_CPSR_IT_MASK;
1426 // If bit zero or 1 is set, this must be thumb...
1427 if (function_addr & 1ull)
1428 new_cpsr |= MASK_CPSR_T; // Set T bit in CPSR
1430 new_cpsr &= ~MASK_CPSR_T; // Clear T bit in CPSR
1432 if (new_cpsr != curr_cpsr) {
1433 if (!reg_ctx->WriteRegisterFromUnsigned(cpsr_reg_info, new_cpsr))
1438 ~1ull; // clear bit zero since the CPSR will take care of the mode for us
1440 // Update the sp - stack pointer - to be aligned to 16-bytes
1442 if (!reg_ctx->WriteRegisterFromUnsigned(sp_reg_num, sp))
1445 // Set "pc" to the address requested
1446 if (!reg_ctx->WriteRegisterFromUnsigned(pc_reg_num, function_addr))
1452 bool ABIMacOSX_arm::GetArgumentValues(Thread &thread, ValueList &values) const {
1453 uint32_t num_values = values.GetSize();
1455 ExecutionContext exe_ctx(thread.shared_from_this());
1456 // For now, assume that the types in the AST values come from the Target's
1459 // Extract the register context so we can read arguments from registers
1461 RegisterContext *reg_ctx = thread.GetRegisterContext().get();
1468 for (uint32_t value_idx = 0; value_idx < num_values; ++value_idx) {
1469 // We currently only support extracting values with Clang QualTypes.
1470 // Do we care about others?
1471 Value *value = values.GetValueAtIndex(value_idx);
1476 CompilerType compiler_type = value->GetCompilerType();
1477 if (compiler_type) {
1478 bool is_signed = false;
1479 size_t bit_width = 0;
1480 if (compiler_type.IsIntegerOrEnumerationType(is_signed)) {
1481 bit_width = compiler_type.GetBitSize(&thread);
1482 } else if (compiler_type.IsPointerOrReferenceType()) {
1483 bit_width = compiler_type.GetBitSize(&thread);
1485 // We only handle integer, pointer and reference types currently...
1489 if (bit_width <= (exe_ctx.GetProcessRef().GetAddressByteSize() * 8)) {
1490 if (value_idx < 4) {
1491 // Arguments 1-4 are in r0-r3...
1492 const RegisterInfo *arg_reg_info = nullptr;
1493 // Search by generic ID first, then fall back to by name
1494 uint32_t arg_reg_num = reg_ctx->ConvertRegisterKindToRegisterNumber(
1495 eRegisterKindGeneric, LLDB_REGNUM_GENERIC_ARG1 + value_idx);
1496 if (arg_reg_num != LLDB_INVALID_REGNUM) {
1497 arg_reg_info = reg_ctx->GetRegisterInfoAtIndex(arg_reg_num);
1499 switch (value_idx) {
1501 arg_reg_info = reg_ctx->GetRegisterInfoByName("r0");
1504 arg_reg_info = reg_ctx->GetRegisterInfoByName("r1");
1507 arg_reg_info = reg_ctx->GetRegisterInfoByName("r2");
1510 arg_reg_info = reg_ctx->GetRegisterInfoByName("r3");
1516 RegisterValue reg_value;
1518 if (reg_ctx->ReadRegister(arg_reg_info, reg_value)) {
1520 reg_value.SignExtend(bit_width);
1521 if (!reg_value.GetScalarValue(value->GetScalar()))
1529 // Read the stack pointer if it already hasn't been read
1530 sp = reg_ctx->GetSP(0);
1535 // Arguments 5 on up are on the stack
1536 const uint32_t arg_byte_size = (bit_width + (8 - 1)) / 8;
1538 if (!exe_ctx.GetProcessRef().ReadScalarIntegerFromMemory(
1539 sp, arg_byte_size, is_signed, value->GetScalar(), error))
1542 sp += arg_byte_size;
1550 bool ABIMacOSX_arm::IsArmv7kProcess() const {
1551 bool is_armv7k = false;
1552 ProcessSP process_sp(GetProcessSP());
1554 const ArchSpec &arch(process_sp->GetTarget().GetArchitecture());
1555 const ArchSpec::Core system_core = arch.GetCore();
1556 if (system_core == ArchSpec::eCore_arm_armv7k) {
1563 ValueObjectSP ABIMacOSX_arm::GetReturnValueObjectImpl(
1564 Thread &thread, lldb_private::CompilerType &compiler_type) const {
1566 ValueObjectSP return_valobj_sp;
1569 return return_valobj_sp;
1571 value.SetCompilerType(compiler_type);
1573 RegisterContext *reg_ctx = thread.GetRegisterContext().get();
1575 return return_valobj_sp;
1579 // Get the pointer to the first stack argument so we have a place to start
1580 // when reading data
1582 const RegisterInfo *r0_reg_info = reg_ctx->GetRegisterInfoByName("r0", 0);
1583 if (compiler_type.IsIntegerOrEnumerationType(is_signed)) {
1584 size_t bit_width = compiler_type.GetBitSize(&thread);
1586 switch (bit_width) {
1588 return return_valobj_sp;
1590 if (IsArmv7kProcess()) {
1591 // "A composite type not larger than 16 bytes is returned in r0-r3. The
1593 // as if the result had been stored in memory at a word-aligned address
1595 // loaded into r0-r3 with an ldm instruction"
1597 const RegisterInfo *r1_reg_info =
1598 reg_ctx->GetRegisterInfoByName("r1", 0);
1599 const RegisterInfo *r2_reg_info =
1600 reg_ctx->GetRegisterInfoByName("r2", 0);
1601 const RegisterInfo *r3_reg_info =
1602 reg_ctx->GetRegisterInfoByName("r3", 0);
1603 if (r1_reg_info && r2_reg_info && r3_reg_info) {
1604 const size_t byte_size = compiler_type.GetByteSize(&thread);
1605 ProcessSP process_sp(thread.GetProcess());
1606 if (byte_size <= r0_reg_info->byte_size + r1_reg_info->byte_size +
1607 r2_reg_info->byte_size +
1608 r3_reg_info->byte_size &&
1610 std::unique_ptr<DataBufferHeap> heap_data_ap(
1611 new DataBufferHeap(byte_size, 0));
1612 const ByteOrder byte_order = process_sp->GetByteOrder();
1613 RegisterValue r0_reg_value;
1614 RegisterValue r1_reg_value;
1615 RegisterValue r2_reg_value;
1616 RegisterValue r3_reg_value;
1617 if (reg_ctx->ReadRegister(r0_reg_info, r0_reg_value) &&
1618 reg_ctx->ReadRegister(r1_reg_info, r1_reg_value) &&
1619 reg_ctx->ReadRegister(r2_reg_info, r2_reg_value) &&
1620 reg_ctx->ReadRegister(r3_reg_info, r3_reg_value)) {
1622 if (r0_reg_value.GetAsMemoryData(r0_reg_info,
1623 heap_data_ap->GetBytes() + 0,
1624 4, byte_order, error) &&
1625 r1_reg_value.GetAsMemoryData(r1_reg_info,
1626 heap_data_ap->GetBytes() + 4,
1627 4, byte_order, error) &&
1628 r2_reg_value.GetAsMemoryData(r2_reg_info,
1629 heap_data_ap->GetBytes() + 8,
1630 4, byte_order, error) &&
1631 r3_reg_value.GetAsMemoryData(r3_reg_info,
1632 heap_data_ap->GetBytes() + 12,
1633 4, byte_order, error)) {
1634 DataExtractor data(DataBufferSP(heap_data_ap.release()),
1636 process_sp->GetAddressByteSize());
1638 return_valobj_sp = ValueObjectConstResult::Create(
1639 &thread, compiler_type, ConstString(""), data);
1640 return return_valobj_sp;
1647 return return_valobj_sp;
1651 const RegisterInfo *r1_reg_info = reg_ctx->GetRegisterInfoByName("r1", 0);
1653 raw_value = reg_ctx->ReadRegisterAsUnsigned(r0_reg_info, 0) & UINT32_MAX;
1654 raw_value |= ((uint64_t)(reg_ctx->ReadRegisterAsUnsigned(r1_reg_info, 0) &
1658 value.GetScalar() = (int64_t)raw_value;
1660 value.GetScalar() = (uint64_t)raw_value;
1664 value.GetScalar() = (int32_t)(
1665 reg_ctx->ReadRegisterAsUnsigned(r0_reg_info, 0) & UINT32_MAX);
1667 value.GetScalar() = (uint32_t)(
1668 reg_ctx->ReadRegisterAsUnsigned(r0_reg_info, 0) & UINT32_MAX);
1672 value.GetScalar() = (int16_t)(
1673 reg_ctx->ReadRegisterAsUnsigned(r0_reg_info, 0) & UINT16_MAX);
1675 value.GetScalar() = (uint16_t)(
1676 reg_ctx->ReadRegisterAsUnsigned(r0_reg_info, 0) & UINT16_MAX);
1680 value.GetScalar() = (int8_t)(
1681 reg_ctx->ReadRegisterAsUnsigned(r0_reg_info, 0) & UINT8_MAX);
1683 value.GetScalar() = (uint8_t)(
1684 reg_ctx->ReadRegisterAsUnsigned(r0_reg_info, 0) & UINT8_MAX);
1687 } else if (compiler_type.IsPointerType()) {
1689 thread.GetRegisterContext()->ReadRegisterAsUnsigned(r0_reg_info, 0) &
1691 value.GetScalar() = ptr;
1694 return return_valobj_sp;
1697 // If we get here, we have a valid Value, so make our ValueObject out of it:
1699 return_valobj_sp = ValueObjectConstResult::Create(
1700 thread.GetStackFrameAtIndex(0).get(), value, ConstString(""));
1701 return return_valobj_sp;
1704 Status ABIMacOSX_arm::SetReturnValueObject(lldb::StackFrameSP &frame_sp,
1705 lldb::ValueObjectSP &new_value_sp) {
1707 if (!new_value_sp) {
1708 error.SetErrorString("Empty value object for return value.");
1712 CompilerType compiler_type = new_value_sp->GetCompilerType();
1713 if (!compiler_type) {
1714 error.SetErrorString("Null clang type for return value.");
1718 Thread *thread = frame_sp->GetThread().get();
1724 RegisterContext *reg_ctx = thread->GetRegisterContext().get();
1726 bool set_it_simple = false;
1727 if (compiler_type.IsIntegerOrEnumerationType(is_signed) ||
1728 compiler_type.IsPointerType()) {
1731 size_t num_bytes = new_value_sp->GetData(data, data_error);
1732 if (data_error.Fail()) {
1733 error.SetErrorStringWithFormat(
1734 "Couldn't convert return value to raw data: %s",
1735 data_error.AsCString());
1738 lldb::offset_t offset = 0;
1739 if (num_bytes <= 8) {
1740 const RegisterInfo *r0_info = reg_ctx->GetRegisterInfoByName("r0", 0);
1741 if (num_bytes <= 4) {
1742 uint32_t raw_value = data.GetMaxU32(&offset, num_bytes);
1744 if (reg_ctx->WriteRegisterFromUnsigned(r0_info, raw_value))
1745 set_it_simple = true;
1747 uint32_t raw_value = data.GetMaxU32(&offset, 4);
1749 if (reg_ctx->WriteRegisterFromUnsigned(r0_info, raw_value)) {
1750 const RegisterInfo *r1_info = reg_ctx->GetRegisterInfoByName("r1", 0);
1751 uint32_t raw_value = data.GetMaxU32(&offset, num_bytes - offset);
1753 if (reg_ctx->WriteRegisterFromUnsigned(r1_info, raw_value))
1754 set_it_simple = true;
1757 } else if (num_bytes <= 16 && IsArmv7kProcess()) {
1758 // "A composite type not larger than 16 bytes is returned in r0-r3. The
1760 // as if the result had been stored in memory at a word-aligned address
1762 // loaded into r0-r3 with an ldm instruction"
1764 const RegisterInfo *r0_info = reg_ctx->GetRegisterInfoByName("r0", 0);
1765 const RegisterInfo *r1_info = reg_ctx->GetRegisterInfoByName("r1", 0);
1766 const RegisterInfo *r2_info = reg_ctx->GetRegisterInfoByName("r2", 0);
1767 const RegisterInfo *r3_info = reg_ctx->GetRegisterInfoByName("r3", 0);
1768 lldb::offset_t offset = 0;
1769 uint32_t bytes_written = 4;
1770 uint32_t raw_value = data.GetMaxU64(&offset, 4);
1771 if (reg_ctx->WriteRegisterFromUnsigned(r0_info, raw_value) &&
1772 bytes_written <= num_bytes) {
1774 raw_value = data.GetMaxU64(&offset, 4);
1775 if (bytes_written <= num_bytes &&
1776 reg_ctx->WriteRegisterFromUnsigned(r1_info, raw_value)) {
1778 raw_value = data.GetMaxU64(&offset, 4);
1779 if (bytes_written <= num_bytes &&
1780 reg_ctx->WriteRegisterFromUnsigned(r2_info, raw_value)) {
1782 raw_value = data.GetMaxU64(&offset, 4);
1783 if (bytes_written <= num_bytes &&
1784 reg_ctx->WriteRegisterFromUnsigned(r3_info, raw_value)) {
1785 set_it_simple = true;
1791 error.SetErrorString("We don't support returning longer than 64 bit "
1792 "integer values at present.");
1794 } else if (compiler_type.IsFloatingPointType(count, is_complex)) {
1796 error.SetErrorString(
1797 "We don't support returning complex values at present");
1799 error.SetErrorString(
1800 "We don't support returning float values at present");
1804 error.SetErrorString(
1805 "We only support setting simple integer return types at present.");
1810 bool ABIMacOSX_arm::CreateFunctionEntryUnwindPlan(UnwindPlan &unwind_plan) {
1811 unwind_plan.Clear();
1812 unwind_plan.SetRegisterKind(eRegisterKindDWARF);
1814 uint32_t lr_reg_num = dwarf_lr;
1815 uint32_t sp_reg_num = dwarf_sp;
1816 uint32_t pc_reg_num = dwarf_pc;
1818 UnwindPlan::RowSP row(new UnwindPlan::Row);
1820 // Our Call Frame Address is the stack pointer value
1821 row->GetCFAValue().SetIsRegisterPlusOffset(sp_reg_num, 0);
1823 // The previous PC is in the LR
1824 row->SetRegisterLocationToRegister(pc_reg_num, lr_reg_num, true);
1825 unwind_plan.AppendRow(row);
1827 // All other registers are the same.
1829 unwind_plan.SetSourceName("arm at-func-entry default");
1830 unwind_plan.SetSourcedFromCompiler(eLazyBoolNo);
1835 bool ABIMacOSX_arm::CreateDefaultUnwindPlan(UnwindPlan &unwind_plan) {
1836 unwind_plan.Clear();
1837 unwind_plan.SetRegisterKind(eRegisterKindDWARF);
1839 uint32_t fp_reg_num =
1840 dwarf_r7; // apple uses r7 for all frames. Normal arm uses r11
1841 uint32_t pc_reg_num = dwarf_pc;
1843 UnwindPlan::RowSP row(new UnwindPlan::Row);
1844 const int32_t ptr_size = 4;
1846 row->GetCFAValue().SetIsRegisterPlusOffset(fp_reg_num, 2 * ptr_size);
1849 row->SetRegisterLocationToAtCFAPlusOffset(fp_reg_num, ptr_size * -2, true);
1850 row->SetRegisterLocationToAtCFAPlusOffset(pc_reg_num, ptr_size * -1, true);
1852 unwind_plan.AppendRow(row);
1853 unwind_plan.SetSourceName("arm-apple-ios default unwind plan");
1854 unwind_plan.SetSourcedFromCompiler(eLazyBoolNo);
1855 unwind_plan.SetUnwindPlanValidAtAllInstructions(eLazyBoolNo);
1860 // cf. "ARMv6 Function Calling Conventions"
1861 // https://developer.apple.com/library/ios/documentation/Xcode/Conceptual/iPhoneOSABIReference/Articles/ARMv6FunctionCallingConventions.html
1862 // and "ARMv7 Function Calling Conventions"
1863 // https://developer.apple.com/library/ios/documentation/Xcode/Conceptual/iPhoneOSABIReference/Articles/ARMv7FunctionCallingConventions.html
1865 // ARMv7 on iOS general purpose reg rules:
1866 // r0-r3 not preserved (used for argument passing)
1868 // r7 preserved (frame pointer)
1870 // r9 not preserved (usable as volatile scratch register with iOS 3.x and
1872 // r10-r11 preserved
1874 // r13 preserved (stack pointer)
1875 // r14 not preserved (link register)
1876 // r15 preserved (pc)
1877 // cpsr not preserved (different rules for different bits)
1879 // ARMv7 on iOS floating point rules:
1880 // d0-d7 not preserved (aka s0-s15, q0-q3)
1881 // d8-d15 preserved (aka s16-s31, q4-q7)
1882 // d16-d31 not preserved (aka q8-q15)
1884 bool ABIMacOSX_arm::RegisterIsVolatile(const RegisterInfo *reg_info) {
1886 // Volatile registers are: r0, r1, r2, r3, r9, r12, r13 (aka sp)
1887 const char *name = reg_info->name;
1888 if (name[0] == 'r') {
1891 return name[2] == '\0'; // r0
1898 return name[3] == '\0'; // r12, r13 (sp)
1905 return name[2] == '\0'; // r2
1907 return name[2] == '\0'; // r3
1909 return name[2] == '\0'; // r9 (apple-ios only...)
1913 } else if (name[0] == 'd') {
1916 return name[2] == '\0'; // d0 is volatile
1921 return true; // d1 is volatile
1926 return name[3] == '\0'; // d16 - d19 are volatile
1935 return true; // d2 is volatile
1946 return name[3] == '\0'; // d20 - d29 are volatile
1955 return true; // d3 is volatile
1958 return name[3] == '\0'; // d30 - d31 are volatile
1967 return name[2] == '\0'; // d4 - d7 are volatile
1972 } else if (name[0] == 's') {
1975 return name[2] == '\0'; // s0 is volatile
1980 return true; // s1 is volatile
1987 return name[3] == '\0'; // s10 - s15 are volatile
2001 return name[2] == '\0'; // s2 - s9 are volatile
2006 } else if (name[0] == 'q') {
2011 return true; // q1 is volatile
2018 return true; // q10-q15 are volatile
2026 return name[2] == '\0'; // q0-q3 are volatile
2029 return name[2] == '\0'; // q8-q9 are volatile
2033 } else if (name[0] == 's' && name[1] == 'p' && name[2] == '\0')
2039 void ABIMacOSX_arm::Initialize() {
2040 PluginManager::RegisterPlugin(GetPluginNameStatic(),
2041 "Mac OS X ABI for arm targets", CreateInstance);
2044 void ABIMacOSX_arm::Terminate() {
2045 PluginManager::UnregisterPlugin(CreateInstance);
2048 lldb_private::ConstString ABIMacOSX_arm::GetPluginNameStatic() {
2049 static ConstString g_name("macosx-arm");
2053 //------------------------------------------------------------------
2054 // PluginInterface protocol
2055 //------------------------------------------------------------------
2057 lldb_private::ConstString ABIMacOSX_arm::GetPluginName() {
2058 return GetPluginNameStatic();
2061 uint32_t ABIMacOSX_arm::GetPluginVersion() { return 1; }