| //===-- ABISysV_mips64.cpp ----------------------------------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "ABISysV_mips64.h" |
| |
| #include "lldb/Core/ConstString.h" |
| #include "lldb/Core/DataExtractor.h" |
| #include "lldb/Core/Error.h" |
| #include "lldb/Core/Log.h" |
| #include "lldb/Core/Module.h" |
| #include "lldb/Core/PluginManager.h" |
| #include "lldb/Core/RegisterValue.h" |
| #include "lldb/Core/Value.h" |
| #include "lldb/Core/ValueObjectConstResult.h" |
| #include "lldb/Core/ValueObjectRegister.h" |
| #include "lldb/Core/ValueObjectMemory.h" |
| #include "lldb/Symbol/UnwindPlan.h" |
| #include "lldb/Target/Target.h" |
| #include "lldb/Target/Process.h" |
| #include "lldb/Target/RegisterContext.h" |
| #include "lldb/Target/StackFrame.h" |
| #include "lldb/Target/Thread.h" |
| |
| #include "llvm/ADT/STLExtras.h" |
| #include "llvm/ADT/Triple.h" |
| |
| using namespace lldb; |
| using namespace lldb_private; |
| |
| enum dwarf_regnums |
| { |
| dwarf_r0 = 0, |
| dwarf_r1, |
| dwarf_r2, |
| dwarf_r3, |
| dwarf_r4, |
| dwarf_r5, |
| dwarf_r6, |
| dwarf_r7, |
| dwarf_r8, |
| dwarf_r9, |
| dwarf_r10, |
| dwarf_r11, |
| dwarf_r12, |
| dwarf_r13, |
| dwarf_r14, |
| dwarf_r15, |
| dwarf_r16, |
| dwarf_r17, |
| dwarf_r18, |
| dwarf_r19, |
| dwarf_r20, |
| dwarf_r21, |
| dwarf_r22, |
| dwarf_r23, |
| dwarf_r24, |
| dwarf_r25, |
| dwarf_r26, |
| dwarf_r27, |
| dwarf_r28, |
| dwarf_r29, |
| dwarf_r30, |
| dwarf_r31, |
| dwarf_sr, |
| dwarf_lo, |
| dwarf_hi, |
| dwarf_bad, |
| dwarf_cause, |
| dwarf_pc |
| }; |
| |
| static const RegisterInfo |
| g_register_infos_mips64[] = |
| { |
| // NAME ALT SZ OFF ENCODING FORMAT EH_FRAME DWARF GENERIC PROCESS PLUGIN LLDB NATIVE VALUE REGS INVALIDATE REGS |
| // ======== ====== == === ============= ========== ============= ================= ==================== ================= ==================== ========== =============== |
| { "r0" , "zero", 8, 0, eEncodingUint, eFormatHex, { dwarf_r0, dwarf_r0, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "r1" , "AT", 8, 0, eEncodingUint, eFormatHex, { dwarf_r1, dwarf_r1, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "r2" , "v0", 8, 0, eEncodingUint, eFormatHex, { dwarf_r2, dwarf_r2, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "r3" , "v1", 8, 0, eEncodingUint, eFormatHex, { dwarf_r3, dwarf_r3, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "r4" , "arg1", 8, 0, eEncodingUint, eFormatHex, { dwarf_r4, dwarf_r4, LLDB_REGNUM_GENERIC_ARG1, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "r5" , "arg2", 8, 0, eEncodingUint, eFormatHex, { dwarf_r5, dwarf_r5, LLDB_REGNUM_GENERIC_ARG2, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "r6" , "arg3", 8, 0, eEncodingUint, eFormatHex, { dwarf_r6, dwarf_r6, LLDB_REGNUM_GENERIC_ARG3, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "r7" , "arg4", 8, 0, eEncodingUint, eFormatHex, { dwarf_r7, dwarf_r7, LLDB_REGNUM_GENERIC_ARG4, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "r8" , "arg5", 8, 0, eEncodingUint, eFormatHex, { dwarf_r8, dwarf_r8, LLDB_REGNUM_GENERIC_ARG5, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "r9" , "arg6", 8, 0, eEncodingUint, eFormatHex, { dwarf_r9, dwarf_r9, LLDB_REGNUM_GENERIC_ARG6, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "r10" , "arg7", 8, 0, eEncodingUint, eFormatHex, { dwarf_r10, dwarf_r10, LLDB_REGNUM_GENERIC_ARG7, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "r11" , "arg8", 8, 0, eEncodingUint, eFormatHex, { dwarf_r11, dwarf_r11, LLDB_REGNUM_GENERIC_ARG8, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "r12" , NULL, 8, 0, eEncodingUint, eFormatHex, { dwarf_r12, dwarf_r12, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "r13" , NULL, 8, 0, eEncodingUint, eFormatHex, { dwarf_r13, dwarf_r13, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "r14" , NULL, 8, 0, eEncodingUint, eFormatHex, { dwarf_r14, dwarf_r14, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "r15" , NULL, 8, 0, eEncodingUint, eFormatHex, { dwarf_r15, dwarf_r15, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "r16" , NULL, 8, 0, eEncodingUint, eFormatHex, { dwarf_r16, dwarf_r16, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "r17" , NULL, 8, 0, eEncodingUint, eFormatHex, { dwarf_r17, dwarf_r17, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "r18" , NULL, 8, 0, eEncodingUint, eFormatHex, { dwarf_r18, dwarf_r18, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "r19" , NULL, 8, 0, eEncodingUint, eFormatHex, { dwarf_r19, dwarf_r19, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "r20" , NULL, 8, 0, eEncodingUint, eFormatHex, { dwarf_r20, dwarf_r20, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "r21" , NULL, 8, 0, eEncodingUint, eFormatHex, { dwarf_r21, dwarf_r21, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "r22" , NULL, 8, 0, eEncodingUint, eFormatHex, { dwarf_r22, dwarf_r22, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "r23" , NULL, 8, 0, eEncodingUint, eFormatHex, { dwarf_r23, dwarf_r23, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "r24" , NULL, 8, 0, eEncodingUint, eFormatHex, { dwarf_r24, dwarf_r24, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "r25" , NULL, 8, 0, eEncodingUint, eFormatHex, { dwarf_r25, dwarf_r25, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "r26" , NULL, 8, 0, eEncodingUint, eFormatHex, { dwarf_r26, dwarf_r26, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "r27" , NULL, 8, 0, eEncodingUint, eFormatHex, { dwarf_r27, dwarf_r27, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "r28" , "gp", 8, 0, eEncodingUint, eFormatHex, { dwarf_r28, dwarf_r28, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "r29" , "sp", 8, 0, eEncodingUint, eFormatHex, { dwarf_r29, dwarf_r29, LLDB_REGNUM_GENERIC_SP, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "r30" , "fp", 8, 0, eEncodingUint, eFormatHex, { dwarf_r30, dwarf_r30, LLDB_REGNUM_GENERIC_FP, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "r31" , "ra", 8, 0, eEncodingUint, eFormatHex, { dwarf_r31, dwarf_r31, LLDB_REGNUM_GENERIC_RA, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "sr" , NULL, 4, 0, eEncodingUint, eFormatHex, { dwarf_sr, dwarf_sr, LLDB_REGNUM_GENERIC_FLAGS, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "lo" , NULL, 8, 0, eEncodingUint, eFormatHex, { dwarf_lo, dwarf_lo, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "hi" , NULL, 8, 0, eEncodingUint, eFormatHex, { dwarf_hi, dwarf_hi, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "bad" , NULL, 8, 0, eEncodingUint, eFormatHex, { dwarf_bad, dwarf_bad, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "cause" , NULL, 8, 0, eEncodingUint, eFormatHex, { dwarf_cause, dwarf_cause, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "pc" , NULL, 8, 0, eEncodingUint, eFormatHex, { dwarf_pc, dwarf_pc, LLDB_REGNUM_GENERIC_PC, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM }, NULL, NULL}, |
| }; |
| |
| static const uint32_t k_num_register_infos = llvm::array_lengthof(g_register_infos_mips64); |
| |
| const lldb_private::RegisterInfo * |
| ABISysV_mips64::GetRegisterInfoArray (uint32_t &count) |
| { |
| count = k_num_register_infos; |
| return g_register_infos_mips64; |
| } |
| |
| size_t |
| ABISysV_mips64::GetRedZoneSize () const |
| { |
| return 0; |
| } |
| |
| //------------------------------------------------------------------ |
| // Static Functions |
| //------------------------------------------------------------------ |
| ABISP |
| ABISysV_mips64::CreateInstance (const ArchSpec &arch) |
| { |
| static ABISP g_abi_sp; |
| const llvm::Triple::ArchType arch_type = arch.GetTriple().getArch(); |
| if ((arch_type == llvm::Triple::mips64) || |
| (arch_type == llvm::Triple::mips64el)) |
| { |
| if (!g_abi_sp) |
| g_abi_sp.reset (new ABISysV_mips64); |
| return g_abi_sp; |
| } |
| return ABISP(); |
| } |
| |
| bool |
| ABISysV_mips64::PrepareTrivialCall (Thread &thread, |
| addr_t sp, |
| addr_t func_addr, |
| addr_t return_addr, |
| llvm::ArrayRef<addr_t> args) const |
| { |
| Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS)); |
| |
| if (log) |
| { |
| StreamString s; |
| s.Printf("ABISysV_mips64::PrepareTrivialCall (tid = 0x%" PRIx64 ", sp = 0x%" PRIx64 ", func_addr = 0x%" PRIx64 ", return_addr = 0x%" PRIx64, |
| thread.GetID(), |
| (uint64_t)sp, |
| (uint64_t)func_addr, |
| (uint64_t)return_addr); |
| |
| for (size_t i = 0; i < args.size(); ++i) |
| s.Printf (", arg%zd = 0x%" PRIx64, i + 1, args[i]); |
| s.PutCString (")"); |
| log->PutCString(s.GetString().c_str()); |
| } |
| |
| RegisterContext *reg_ctx = thread.GetRegisterContext().get(); |
| if (!reg_ctx) |
| return false; |
| |
| const RegisterInfo *reg_info = NULL; |
| |
| if (args.size() > 8) // TODO handle more than 8 arguments |
| return false; |
| |
| for (size_t i = 0; i < args.size(); ++i) |
| { |
| reg_info = reg_ctx->GetRegisterInfo(eRegisterKindGeneric, LLDB_REGNUM_GENERIC_ARG1 + i); |
| if (log) |
| log->Printf("About to write arg%zd (0x%" PRIx64 ") into %s", i + 1, args[i], reg_info->name); |
| if (!reg_ctx->WriteRegisterFromUnsigned(reg_info, args[i])) |
| return false; |
| } |
| |
| // First, align the SP |
| |
| if (log) |
| log->Printf("16-byte aligning SP: 0x%" PRIx64 " to 0x%" PRIx64, (uint64_t)sp, (uint64_t)(sp & ~0xfull)); |
| |
| sp &= ~(0xfull); // 16-byte alignment |
| |
| Error error; |
| const RegisterInfo *pc_reg_info = reg_ctx->GetRegisterInfo (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_PC); |
| const RegisterInfo *sp_reg_info = reg_ctx->GetRegisterInfo (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_SP); |
| const RegisterInfo *ra_reg_info = reg_ctx->GetRegisterInfo (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_RA); |
| const RegisterInfo *r25_info = reg_ctx->GetRegisterInfoByName("r25", 0); |
| const RegisterInfo *r0_info = reg_ctx->GetRegisterInfoByName("zero", 0); |
| |
| if (log) |
| log->Printf("Writing R0: 0x%" PRIx64, (uint64_t)0); |
| |
| /* Write r0 with 0, in case we are stopped in syscall, |
| * such setting prevents automatic decrement of the PC. |
| * This clears the bug 23659 for MIPS. |
| */ |
| if (!reg_ctx->WriteRegisterFromUnsigned (r0_info, (uint64_t)0)) |
| return false; |
| |
| if (log) |
| log->Printf("Writing SP: 0x%" PRIx64, (uint64_t)sp); |
| |
| // Set "sp" to the requested value |
| if (!reg_ctx->WriteRegisterFromUnsigned (sp_reg_info, sp)) |
| return false; |
| |
| if (log) |
| log->Printf("Writing RA: 0x%" PRIx64, (uint64_t)return_addr); |
| |
| // Set "ra" to the return address |
| if (!reg_ctx->WriteRegisterFromUnsigned (ra_reg_info, return_addr)) |
| return false; |
| |
| if (log) |
| log->Printf("Writing PC: 0x%" PRIx64, (uint64_t)func_addr); |
| |
| // Set pc to the address of the called function. |
| if (!reg_ctx->WriteRegisterFromUnsigned (pc_reg_info, func_addr)) |
| return false; |
| |
| if (log) |
| log->Printf("Writing r25: 0x%" PRIx64, (uint64_t)func_addr); |
| |
| // All callers of position independent functions must place the address of the called function in t9 (r25) |
| if (!reg_ctx->WriteRegisterFromUnsigned (r25_info, func_addr)) |
| return false; |
| |
| return true; |
| } |
| |
| bool |
| ABISysV_mips64::GetArgumentValues (Thread &thread, ValueList &values) const |
| { |
| return false; |
| } |
| |
| Error |
| ABISysV_mips64::SetReturnValueObject(lldb::StackFrameSP &frame_sp, lldb::ValueObjectSP &new_value_sp) |
| { |
| Error error; |
| if (!new_value_sp) |
| { |
| error.SetErrorString("Empty value object for return value."); |
| return error; |
| } |
| |
| CompilerType compiler_type = new_value_sp->GetCompilerType(); |
| if (!compiler_type) |
| { |
| error.SetErrorString ("Null clang type for return value."); |
| return error; |
| } |
| |
| Thread *thread = frame_sp->GetThread().get(); |
| |
| RegisterContext *reg_ctx = thread->GetRegisterContext().get(); |
| |
| if (!reg_ctx) |
| error.SetErrorString("no registers are available"); |
| |
| DataExtractor data; |
| Error data_error; |
| size_t num_bytes = new_value_sp->GetData(data, data_error); |
| if (data_error.Fail()) |
| { |
| error.SetErrorStringWithFormat("Couldn't convert return value to raw data: %s", data_error.AsCString()); |
| return error; |
| } |
| |
| const uint32_t type_flags = compiler_type.GetTypeInfo (NULL); |
| |
| if (type_flags & eTypeIsScalar || |
| type_flags & eTypeIsPointer) |
| { |
| if (type_flags & eTypeIsInteger || |
| type_flags & eTypeIsPointer ) |
| { |
| lldb::offset_t offset = 0; |
| |
| if (num_bytes <= 16) |
| { |
| const RegisterInfo *r2_info = reg_ctx->GetRegisterInfoByName("r2", 0); |
| if (num_bytes <= 8) |
| { |
| uint64_t raw_value = data.GetMaxU64(&offset, num_bytes); |
| |
| if (!reg_ctx->WriteRegisterFromUnsigned (r2_info, raw_value)) |
| error.SetErrorString ("failed to write register r2"); |
| } |
| else |
| { |
| uint64_t raw_value = data.GetMaxU64(&offset, 8); |
| if (reg_ctx->WriteRegisterFromUnsigned (r2_info, raw_value)) |
| { |
| const RegisterInfo *r3_info = reg_ctx->GetRegisterInfoByName("r3", 0); |
| raw_value = data.GetMaxU64(&offset, num_bytes - offset); |
| |
| if (!reg_ctx->WriteRegisterFromUnsigned (r3_info, raw_value)) |
| error.SetErrorString ("failed to write register r3"); |
| } |
| else |
| error.SetErrorString ("failed to write register r2"); |
| } |
| } |
| else |
| { |
| error.SetErrorString("We don't support returning longer than 128 bit integer values at present."); |
| } |
| } |
| else if (type_flags & eTypeIsFloat) |
| { |
| error.SetErrorString("TODO: Handle Float Types."); |
| } |
| } |
| else if (type_flags & eTypeIsVector) |
| { |
| error.SetErrorString("returning vector values are not supported"); |
| } |
| |
| return error; |
| } |
| |
| |
| ValueObjectSP |
| ABISysV_mips64::GetReturnValueObjectSimple (Thread &thread, CompilerType &return_compiler_type) const |
| { |
| ValueObjectSP return_valobj_sp; |
| return return_valobj_sp; |
| } |
| |
| ValueObjectSP |
| ABISysV_mips64::GetReturnValueObjectImpl (Thread &thread, CompilerType &return_compiler_type) const |
| { |
| ValueObjectSP return_valobj_sp; |
| Value value; |
| Error error; |
| |
| ExecutionContext exe_ctx (thread.shared_from_this()); |
| if (exe_ctx.GetTargetPtr() == NULL || exe_ctx.GetProcessPtr() == NULL) |
| return return_valobj_sp; |
| |
| value.SetCompilerType(return_compiler_type); |
| |
| RegisterContext *reg_ctx = thread.GetRegisterContext().get(); |
| if (!reg_ctx) |
| return return_valobj_sp; |
| |
| Target *target = exe_ctx.GetTargetPtr(); |
| const ArchSpec target_arch = target->GetArchitecture(); |
| ByteOrder target_byte_order = target_arch.GetByteOrder(); |
| const size_t byte_size = return_compiler_type.GetByteSize(nullptr); |
| const uint32_t type_flags = return_compiler_type.GetTypeInfo (NULL); |
| uint32_t fp_flag = target_arch.GetFlags () & lldb_private::ArchSpec::eMIPS_ABI_FP_mask; |
| |
| const RegisterInfo *r2_info = reg_ctx->GetRegisterInfoByName("r2", 0); |
| const RegisterInfo *r3_info = reg_ctx->GetRegisterInfoByName("r3", 0); |
| |
| if (type_flags & eTypeIsScalar || |
| type_flags & eTypeIsPointer) |
| { |
| value.SetValueType(Value::eValueTypeScalar); |
| |
| bool success = false; |
| if (type_flags & eTypeIsInteger || |
| type_flags & eTypeIsPointer) |
| { |
| // Extract the register context so we can read arguments from registers |
| // In MIPS register "r2" (v0) holds the integer function return values |
| |
| uint64_t raw_value = reg_ctx->ReadRegisterAsUnsigned(r2_info, 0); |
| |
| const bool is_signed = (type_flags & eTypeIsSigned) != 0; |
| switch (byte_size) |
| { |
| default: |
| break; |
| |
| case sizeof(uint64_t): |
| if (is_signed) |
| value.GetScalar() = (int64_t)(raw_value); |
| else |
| value.GetScalar() = (uint64_t)(raw_value); |
| success = true; |
| break; |
| |
| case sizeof(uint32_t): |
| if (is_signed) |
| value.GetScalar() = (int32_t)(raw_value & UINT32_MAX); |
| else |
| value.GetScalar() = (uint32_t)(raw_value & UINT32_MAX); |
| success = true; |
| break; |
| |
| case sizeof(uint16_t): |
| if (is_signed) |
| value.GetScalar() = (int16_t)(raw_value & UINT16_MAX); |
| else |
| value.GetScalar() = (uint16_t)(raw_value & UINT16_MAX); |
| success = true; |
| break; |
| |
| case sizeof(uint8_t): |
| if (is_signed) |
| value.GetScalar() = (int8_t)(raw_value & UINT8_MAX); |
| else |
| value.GetScalar() = (uint8_t)(raw_value & UINT8_MAX); |
| success = true; |
| break; |
| } |
| } |
| else if (type_flags & eTypeIsFloat) |
| { |
| if (type_flags & eTypeIsComplex) |
| { |
| // Don't handle complex yet. |
| } |
| else if (IsSoftFloat(fp_flag)) |
| { |
| uint64_t raw_value = reg_ctx->ReadRegisterAsUnsigned(r2_info, 0); |
| switch (byte_size) |
| { |
| case 4: |
| value.GetScalar() = *((float *)(&raw_value)); |
| success = true; |
| break; |
| case 8: |
| value.GetScalar() = *((double *)(&raw_value)); |
| success = true; |
| break; |
| case 16: |
| uint64_t result[2]; |
| if (target_byte_order == eByteOrderLittle) |
| { |
| result[0] = raw_value; |
| result[1] = reg_ctx->ReadRegisterAsUnsigned(r3_info, 0); |
| value.GetScalar() = *((long double *)(result)); |
| } |
| else |
| { |
| result[0] = reg_ctx->ReadRegisterAsUnsigned(r3_info, 0); |
| result[1] = raw_value; |
| value.GetScalar() = *((long double *)(result)); |
| } |
| success = true; |
| break; |
| } |
| |
| } |
| else |
| { |
| if (byte_size <= sizeof(long double)) |
| { |
| const RegisterInfo *f0_info = reg_ctx->GetRegisterInfoByName("f0", 0); |
| |
| RegisterValue f0_value; |
| DataExtractor f0_data; |
| |
| reg_ctx->ReadRegister (f0_info, f0_value); |
| |
| |
| f0_value.GetData(f0_data); |
| |
| |
| lldb::offset_t offset = 0; |
| if (byte_size == sizeof(float)) |
| { |
| value.GetScalar() = (float) f0_data.GetFloat(&offset); |
| success = true; |
| } |
| else if (byte_size == sizeof(double)) |
| { |
| value.GetScalar() = (double) f0_data.GetDouble(&offset); |
| success = true; |
| } |
| else if (byte_size == sizeof(long double)) |
| { |
| const RegisterInfo *f2_info = reg_ctx->GetRegisterInfoByName("f2", 0); |
| RegisterValue f2_value; |
| DataExtractor f2_data; |
| reg_ctx->ReadRegister (f2_info, f2_value); |
| DataExtractor *copy_from_extractor = NULL; |
| DataBufferSP data_sp (new DataBufferHeap(16, 0)); |
| DataExtractor return_ext (data_sp, |
| target_byte_order, |
| target->GetArchitecture().GetAddressByteSize()); |
| |
| if (target_byte_order == eByteOrderLittle) |
| { |
| copy_from_extractor = &f0_data; |
| copy_from_extractor->CopyByteOrderedData (0, |
| 8, |
| data_sp->GetBytes(), |
| byte_size - 8, |
| target_byte_order); |
| f2_value.GetData(f2_data); |
| copy_from_extractor = &f2_data; |
| copy_from_extractor->CopyByteOrderedData (0, |
| 8, |
| data_sp->GetBytes() + 8, |
| byte_size - 8, |
| target_byte_order); |
| } |
| else |
| { |
| copy_from_extractor = &f0_data; |
| copy_from_extractor->CopyByteOrderedData (0, |
| 8, |
| data_sp->GetBytes() + 8, |
| byte_size - 8, |
| target_byte_order); |
| f2_value.GetData(f2_data); |
| copy_from_extractor = &f2_data; |
| copy_from_extractor->CopyByteOrderedData (0, |
| 8, |
| data_sp->GetBytes(), |
| byte_size - 8, |
| target_byte_order); |
| } |
| |
| return_valobj_sp = ValueObjectConstResult::Create (&thread, |
| return_compiler_type, |
| ConstString(""), |
| return_ext); |
| return return_valobj_sp; |
| |
| } |
| } |
| } |
| } |
| |
| if (success) |
| return_valobj_sp = ValueObjectConstResult::Create (thread.GetStackFrameAtIndex(0).get(), |
| value, |
| ConstString("")); |
| } |
| else if (type_flags & eTypeIsStructUnion || |
| type_flags & eTypeIsClass || |
| type_flags & eTypeIsVector) |
| { |
| // Any structure of up to 16 bytes in size is returned in the registers. |
| if (byte_size <= 16) |
| { |
| DataBufferSP data_sp (new DataBufferHeap(16, 0)); |
| DataExtractor return_ext (data_sp, |
| target_byte_order, |
| target->GetArchitecture().GetAddressByteSize()); |
| |
| RegisterValue r2_value, r3_value, f0_value, f1_value, f2_value; |
| |
| uint32_t integer_bytes = 0; // Tracks how much bytes of r2 and r3 registers we've consumed so far |
| bool use_fp_regs = 0; // True if return values are in FP return registers. |
| bool found_non_fp_field = 0; // True if we found any non floating point field in structure. |
| bool use_r2 = 0; // True if return values are in r2 register. |
| bool use_r3 = 0; // True if return values are in r3 register. |
| bool sucess = 0; // True if the result is copied into our data buffer |
| std::string name; |
| bool is_complex; |
| uint32_t count; |
| const uint32_t num_children = return_compiler_type.GetNumFields (); |
| |
| // A structure consisting of one or two FP values (and nothing else) will be |
| // returned in the two FP return-value registers i.e fp0 and fp2. |
| if (num_children <= 2) |
| { |
| uint64_t field_bit_offset = 0; |
| |
| // Check if this structure contains only floating point fields |
| for (uint32_t idx = 0; idx < num_children; idx++) |
| { |
| CompilerType field_compiler_type = return_compiler_type.GetFieldAtIndex (idx, name, &field_bit_offset, NULL, NULL); |
| |
| if (field_compiler_type.IsFloatingPointType (count, is_complex)) |
| use_fp_regs = 1; |
| else |
| found_non_fp_field = 1; |
| } |
| |
| if (use_fp_regs && !found_non_fp_field) |
| { |
| // We have one or two FP-only values in this structure. Get it from f0/f2 registers. |
| DataExtractor f0_data, f1_data, f2_data; |
| const RegisterInfo *f0_info = reg_ctx->GetRegisterInfoByName("f0", 0); |
| const RegisterInfo *f1_info = reg_ctx->GetRegisterInfoByName("f1", 0); |
| const RegisterInfo *f2_info = reg_ctx->GetRegisterInfoByName("f2", 0); |
| |
| reg_ctx->ReadRegister (f0_info, f0_value); |
| reg_ctx->ReadRegister (f2_info, f2_value); |
| |
| f0_value.GetData(f0_data); |
| f2_value.GetData(f2_data); |
| |
| for (uint32_t idx = 0; idx < num_children; idx++) |
| { |
| CompilerType field_compiler_type = return_compiler_type.GetFieldAtIndex (idx, name, &field_bit_offset, NULL, NULL); |
| const size_t field_byte_width = field_compiler_type.GetByteSize(nullptr); |
| |
| DataExtractor *copy_from_extractor = NULL; |
| |
| if (idx == 0) |
| { |
| if (field_byte_width == 16) // This case is for long double type. |
| { |
| // If structure contains long double type, then it is returned in fp0/fp1 registers. |
| reg_ctx->ReadRegister (f1_info, f1_value); |
| f1_value.GetData(f1_data); |
| |
| if (target_byte_order == eByteOrderLittle) |
| { |
| f0_data.Append(f1_data); |
| copy_from_extractor = &f0_data; |
| } |
| else |
| { |
| f1_data.Append(f0_data); |
| copy_from_extractor = &f1_data; |
| } |
| } |
| else |
| copy_from_extractor = &f0_data; // This is in f0, copy from register to our result structure |
| } |
| else |
| copy_from_extractor = &f2_data; // This is in f2, copy from register to our result structure |
| |
| // Sanity check to avoid crash |
| if (!copy_from_extractor || field_byte_width > copy_from_extractor->GetByteSize()) |
| return return_valobj_sp; |
| |
| // copy the register contents into our data buffer |
| copy_from_extractor->CopyByteOrderedData (0, |
| field_byte_width, |
| data_sp->GetBytes() + (field_bit_offset/8), |
| field_byte_width, |
| target_byte_order); |
| } |
| |
| // The result is in our data buffer. Create a variable object out of it |
| return_valobj_sp = ValueObjectConstResult::Create (&thread, |
| return_compiler_type, |
| ConstString(""), |
| return_ext); |
| |
| return return_valobj_sp; |
| } |
| } |
| |
| // If we reach here, it means this structure either contains more than two fields or |
| // it contains at least one non floating point type. |
| // In that case, all fields are returned in GP return registers. |
| for (uint32_t idx = 0; idx < num_children; idx++) |
| { |
| uint64_t field_bit_offset = 0; |
| bool is_signed; |
| uint32_t padding; |
| |
| CompilerType field_compiler_type = return_compiler_type.GetFieldAtIndex (idx, name, &field_bit_offset, NULL, NULL); |
| const size_t field_byte_width = field_compiler_type.GetByteSize(nullptr); |
| |
| // if we don't know the size of the field (e.g. invalid type), just bail out |
| if (field_byte_width == 0) |
| break; |
| |
| uint32_t field_byte_offset = field_bit_offset/8; |
| |
| if (field_compiler_type.IsIntegerType (is_signed) |
| || field_compiler_type.IsPointerType () |
| || field_compiler_type.IsFloatingPointType (count, is_complex)) |
| { |
| padding = field_byte_offset - integer_bytes; |
| |
| if (integer_bytes < 8) |
| { |
| // We have not yet consumed r2 completely. |
| if (integer_bytes + field_byte_width + padding <= 8) |
| { |
| // This field fits in r2, copy its value from r2 to our result structure |
| integer_bytes = integer_bytes + field_byte_width + padding; // Increase the consumed bytes. |
| use_r2 = 1; |
| } |
| else |
| { |
| // There isn't enough space left in r2 for this field, so this will be in r3. |
| integer_bytes = integer_bytes + field_byte_width + padding; // Increase the consumed bytes. |
| use_r3 = 1; |
| } |
| } |
| // We already have consumed at-least 8 bytes that means r2 is done, and this field will be in r3. |
| // Check if this field can fit in r3. |
| else if (integer_bytes + field_byte_width + padding <= 16) |
| { |
| integer_bytes = integer_bytes + field_byte_width + padding; |
| use_r3 = 1; |
| } |
| else |
| { |
| // There isn't any space left for this field, this should not happen as we have already checked |
| // the overall size is not greater than 16 bytes. For now, return a NULL return value object. |
| return return_valobj_sp; |
| } |
| } |
| } |
| // Vector types upto 16 bytes are returned in GP return registers |
| if (type_flags & eTypeIsVector) |
| { |
| if (byte_size <= 8) |
| use_r2 = 1; |
| else |
| { |
| use_r2 = 1; |
| use_r3 = 1; |
| } |
| } |
| |
| if (use_r2) |
| { |
| reg_ctx->ReadRegister (r2_info, r2_value); |
| |
| const size_t bytes_copied = r2_value.GetAsMemoryData (r2_info, |
| data_sp->GetBytes(), |
| r2_info->byte_size, |
| target_byte_order, |
| error); |
| if (bytes_copied != r2_info->byte_size) |
| return return_valobj_sp; |
| sucess = 1; |
| } |
| if (use_r3) |
| { |
| reg_ctx->ReadRegister (r3_info, r3_value); |
| const size_t bytes_copied = r3_value.GetAsMemoryData (r3_info, |
| data_sp->GetBytes() + r2_info->byte_size, |
| r3_info->byte_size, |
| target_byte_order, |
| error); |
| |
| if (bytes_copied != r3_info->byte_size) |
| return return_valobj_sp; |
| sucess = 1; |
| } |
| if (sucess) |
| { |
| // The result is in our data buffer. Create a variable object out of it |
| return_valobj_sp = ValueObjectConstResult::Create (&thread, |
| return_compiler_type, |
| ConstString(""), |
| return_ext); |
| } |
| return return_valobj_sp; |
| } |
| |
| // Any structure/vector greater than 16 bytes in size is returned in memory. |
| // The pointer to that memory is returned in r2. |
| uint64_t mem_address = reg_ctx->ReadRegisterAsUnsigned(reg_ctx->GetRegisterInfoByName("r2", 0), 0); |
| |
| // We have got the address. Create a memory object out of it |
| return_valobj_sp = ValueObjectMemory::Create (&thread, |
| "", |
| Address (mem_address, NULL), |
| return_compiler_type); |
| } |
| return return_valobj_sp; |
| } |
| |
| bool |
| ABISysV_mips64::CreateFunctionEntryUnwindPlan (UnwindPlan &unwind_plan) |
| { |
| unwind_plan.Clear(); |
| unwind_plan.SetRegisterKind (eRegisterKindDWARF); |
| |
| UnwindPlan::RowSP row(new UnwindPlan::Row); |
| |
| // Our Call Frame Address is the stack pointer value |
| row->GetCFAValue().SetIsRegisterPlusOffset(dwarf_r29, 0); |
| |
| // The previous PC is in the RA |
| row->SetRegisterLocationToRegister(dwarf_pc, dwarf_r31, true); |
| unwind_plan.AppendRow (row); |
| |
| // All other registers are the same. |
| |
| unwind_plan.SetSourceName ("mips64 at-func-entry default"); |
| unwind_plan.SetSourcedFromCompiler (eLazyBoolNo); |
| unwind_plan.SetReturnAddressRegister(dwarf_r31); |
| return true; |
| } |
| |
| bool |
| ABISysV_mips64::CreateDefaultUnwindPlan (UnwindPlan &unwind_plan) |
| { |
| unwind_plan.Clear(); |
| unwind_plan.SetRegisterKind (eRegisterKindDWARF); |
| |
| UnwindPlan::RowSP row(new UnwindPlan::Row); |
| |
| row->GetCFAValue().SetIsRegisterPlusOffset(dwarf_r29, 0); |
| |
| row->SetRegisterLocationToRegister(dwarf_pc, dwarf_r31, true); |
| |
| unwind_plan.AppendRow (row); |
| unwind_plan.SetSourceName ("mips64 default unwind plan"); |
| unwind_plan.SetSourcedFromCompiler (eLazyBoolNo); |
| unwind_plan.SetUnwindPlanValidAtAllInstructions (eLazyBoolNo); |
| return true; |
| } |
| |
| bool |
| ABISysV_mips64::RegisterIsVolatile (const RegisterInfo *reg_info) |
| { |
| return !RegisterIsCalleeSaved (reg_info); |
| } |
| |
| bool |
| ABISysV_mips64::IsSoftFloat (uint32_t fp_flag) const |
| { |
| return (fp_flag == lldb_private::ArchSpec::eMIPS_ABI_FP_SOFT); |
| } |
| |
| bool |
| ABISysV_mips64::RegisterIsCalleeSaved (const RegisterInfo *reg_info) |
| { |
| if (reg_info) |
| { |
| // Preserved registers are : |
| // r16-r23, r28, r29, r30, r31 |
| |
| int reg = ((reg_info->byte_offset) / 8); |
| |
| bool save = (reg >= 16) && (reg <= 23); |
| save |= (reg >= 28) && (reg <= 31); |
| |
| return save; |
| } |
| return false; |
| } |
| |
| void |
| ABISysV_mips64::Initialize() |
| { |
| PluginManager::RegisterPlugin (GetPluginNameStatic(), |
| "System V ABI for mips64 targets", |
| CreateInstance); |
| } |
| |
| void |
| ABISysV_mips64::Terminate() |
| { |
| PluginManager::UnregisterPlugin (CreateInstance); |
| } |
| |
| lldb_private::ConstString |
| ABISysV_mips64::GetPluginNameStatic() |
| { |
| static ConstString g_name("sysv-mips64"); |
| return g_name; |
| } |
| |
| //------------------------------------------------------------------ |
| // PluginInterface protocol |
| //------------------------------------------------------------------ |
| lldb_private::ConstString |
| ABISysV_mips64::GetPluginName() |
| { |
| return GetPluginNameStatic(); |
| } |
| |
| uint32_t |
| ABISysV_mips64::GetPluginVersion() |
| { |
| return 1; |
| } |
