diff options
Diffstat (limited to 'source/Plugins/ABI/SysV-mips/ABISysV_mips.cpp')
| -rw-r--r-- | source/Plugins/ABI/SysV-mips/ABISysV_mips.cpp | 121 |
1 files changed, 100 insertions, 21 deletions
diff --git a/source/Plugins/ABI/SysV-mips/ABISysV_mips.cpp b/source/Plugins/ABI/SysV-mips/ABISysV_mips.cpp index 1b77946c1..7e1cf76df 100644 --- a/source/Plugins/ABI/SysV-mips/ABISysV_mips.cpp +++ b/source/Plugins/ABI/SysV-mips/ABISysV_mips.cpp @@ -393,7 +393,11 @@ ABISysV_mips::GetReturnValueObjectImpl (Thread &thread, CompilerType &return_com if (exe_ctx.GetTargetPtr() == NULL || exe_ctx.GetProcessPtr() == NULL) return return_valobj_sp; + Target *target = exe_ctx.GetTargetPtr(); + const ArchSpec target_arch = target->GetArchitecture(); + ByteOrder target_byte_order = target_arch.GetByteOrder(); value.SetCompilerType(return_compiler_type); + uint32_t fp_flag = target_arch.GetFlags() & lldb_private::ArchSpec::eMIPS_ABI_FP_mask; RegisterContext *reg_ctx = thread.GetRegisterContext().get(); if (!reg_ctx) @@ -405,8 +409,7 @@ ABISysV_mips::GetReturnValueObjectImpl (Thread &thread, CompilerType &return_com // In MIPS register "r2" (v0) holds the integer function return values const RegisterInfo *r2_reg_info = reg_ctx->GetRegisterInfoByName("r2", 0); - size_t bit_width = return_compiler_type.GetBitSize(&thread); - + size_t bit_width = return_compiler_type.GetBitSize(&thread); if (return_compiler_type.IsIntegerType (is_signed)) { switch (bit_width) @@ -463,37 +466,107 @@ ABISysV_mips::GetReturnValueObjectImpl (Thread &thread, CompilerType &return_com } else if (return_compiler_type.IsFloatingPointType (count, is_complex)) { - const RegisterInfo *f0_info = reg_ctx->GetRegisterInfoByName("f0", 0); - const RegisterInfo *f1_info = reg_ctx->GetRegisterInfoByName("f1", 0); - - if (count == 1 && !is_complex) + if (IsSoftFloat (fp_flag)) { + uint64_t raw_value = reg_ctx->ReadRegisterAsUnsigned(r2_reg_info, 0); + if (count != 1 && is_complex) + return return_valobj_sp; switch (bit_width) { default: return return_valobj_sp; - case 64: - { - static_assert(sizeof(double) == sizeof(uint64_t), ""); - uint64_t raw_value; - raw_value = reg_ctx->ReadRegisterAsUnsigned(f0_info, 0) & UINT32_MAX; - raw_value |= ((uint64_t)(reg_ctx->ReadRegisterAsUnsigned(f1_info, 0) & UINT32_MAX)) << 32; - value.GetScalar() = *reinterpret_cast<double*>(&raw_value); - break; - } case 32: - { static_assert(sizeof(float) == sizeof(uint32_t), ""); - uint32_t raw_value = reg_ctx->ReadRegisterAsUnsigned(f0_info, 0) & UINT32_MAX; - value.GetScalar() = *reinterpret_cast<float*>(&raw_value); + value.GetScalar() = *((float *)(&raw_value)); + break; + case 64: + static_assert(sizeof(double) == sizeof(uint64_t), ""); + const RegisterInfo *r3_reg_info = reg_ctx->GetRegisterInfoByName("r3", 0); + if (target_byte_order == eByteOrderLittle) + raw_value = ((reg_ctx->ReadRegisterAsUnsigned(r3_reg_info, 0)) << 32) | raw_value; + else + raw_value = (raw_value << 32) | reg_ctx->ReadRegisterAsUnsigned(r3_reg_info, 0); + value.GetScalar() = *((double *)(&raw_value)); break; - } } } + else { - // not handled yet - return return_valobj_sp; + 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 (count == 1 && !is_complex) + { + switch (bit_width) + { + default: + return return_valobj_sp; + case 64: + { + static_assert(sizeof(double) == sizeof(uint64_t), ""); + const RegisterInfo *f1_info = reg_ctx->GetRegisterInfoByName("f1", 0); + RegisterValue f1_value; + DataExtractor f1_data; + reg_ctx->ReadRegister (f1_info, f1_value); + DataExtractor *copy_from_extractor = nullptr; + DataBufferSP data_sp (new DataBufferHeap(8, 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 (offset, + 4, + data_sp->GetBytes(), + 4, + target_byte_order); + f1_value.GetData(f1_data); + copy_from_extractor = &f1_data; + copy_from_extractor->CopyByteOrderedData (offset, + 4, + data_sp->GetBytes() + 4, + 4, + target_byte_order); + } + else + { + copy_from_extractor = &f0_data; + copy_from_extractor->CopyByteOrderedData (offset, + 4, + data_sp->GetBytes() + 4, + 4, + target_byte_order); + f1_value.GetData(f1_data); + copy_from_extractor = &f1_data; + copy_from_extractor->CopyByteOrderedData (offset, + 4, + data_sp->GetBytes(), + 4, + target_byte_order); + } + value.GetScalar() = (double) return_ext.GetDouble(&offset); + break; + } + case 32: + { + static_assert(sizeof(float) == sizeof(uint32_t), ""); + value.GetScalar() = (float) f0_data.GetFloat(&offset); + break; + } + } + } + else + { + // not handled yet + return return_valobj_sp; + } } } else @@ -559,6 +632,12 @@ ABISysV_mips::RegisterIsVolatile (const RegisterInfo *reg_info) } bool +ABISysV_mips::IsSoftFloat(uint32_t fp_flags) const +{ + return (fp_flags == lldb_private::ArchSpec::eMIPS_ABI_FP_SOFT); +} + +bool ABISysV_mips::RegisterIsCalleeSaved (const RegisterInfo *reg_info) { if (reg_info) |