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-rw-r--r--lldb/source/Plugins/ABI/PowerPC/ABIPowerPC.cpp24
-rw-r--r--lldb/source/Plugins/ABI/PowerPC/ABIPowerPC.h17
-rw-r--r--lldb/source/Plugins/ABI/PowerPC/ABISysV_ppc.cpp982
-rw-r--r--lldb/source/Plugins/ABI/PowerPC/ABISysV_ppc.h102
-rw-r--r--lldb/source/Plugins/ABI/PowerPC/ABISysV_ppc64.cpp1087
-rw-r--r--lldb/source/Plugins/ABI/PowerPC/ABISysV_ppc64.h104
6 files changed, 2316 insertions, 0 deletions
diff --git a/lldb/source/Plugins/ABI/PowerPC/ABIPowerPC.cpp b/lldb/source/Plugins/ABI/PowerPC/ABIPowerPC.cpp
new file mode 100644
index 0000000000000..b561e3c93f571
--- /dev/null
+++ b/lldb/source/Plugins/ABI/PowerPC/ABIPowerPC.cpp
@@ -0,0 +1,24 @@
+//===-- PowerPC.h ---------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "ABIPowerPC.h"
+#include "ABISysV_ppc.h"
+#include "ABISysV_ppc64.h"
+#include "lldb/Core/PluginManager.h"
+
+LLDB_PLUGIN_DEFINE(ABIPowerPC)
+
+void ABIPowerPC::Initialize() {
+ ABISysV_ppc::Initialize();
+ ABISysV_ppc64::Initialize();
+}
+
+void ABIPowerPC::Terminate() {
+ ABISysV_ppc::Terminate();
+ ABISysV_ppc64::Terminate();
+}
diff --git a/lldb/source/Plugins/ABI/PowerPC/ABIPowerPC.h b/lldb/source/Plugins/ABI/PowerPC/ABIPowerPC.h
new file mode 100644
index 0000000000000..5e745eae0a422
--- /dev/null
+++ b/lldb/source/Plugins/ABI/PowerPC/ABIPowerPC.h
@@ -0,0 +1,17 @@
+//===-- PowerPC.h -----------------------------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLDB_SOURCE_PLUGINS_ABI_POWERPC_ABIPOWERPC_H
+#define LLDB_SOURCE_PLUGINS_ABI_POWERPC_ABIPOWERPC_H
+
+class ABIPowerPC {
+public:
+ static void Initialize();
+ static void Terminate();
+};
+#endif
diff --git a/lldb/source/Plugins/ABI/PowerPC/ABISysV_ppc.cpp b/lldb/source/Plugins/ABI/PowerPC/ABISysV_ppc.cpp
new file mode 100644
index 0000000000000..6f5eded7b0315
--- /dev/null
+++ b/lldb/source/Plugins/ABI/PowerPC/ABISysV_ppc.cpp
@@ -0,0 +1,982 @@
+//===-- ABISysV_ppc.cpp ---------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "ABISysV_ppc.h"
+
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/ADT/Triple.h"
+
+#include "lldb/Core/Module.h"
+#include "lldb/Core/PluginManager.h"
+#include "lldb/Core/Value.h"
+#include "lldb/Core/ValueObjectConstResult.h"
+#include "lldb/Core/ValueObjectMemory.h"
+#include "lldb/Core/ValueObjectRegister.h"
+#include "lldb/Symbol/UnwindPlan.h"
+#include "lldb/Target/Process.h"
+#include "lldb/Target/RegisterContext.h"
+#include "lldb/Target/StackFrame.h"
+#include "lldb/Target/Target.h"
+#include "lldb/Target/Thread.h"
+#include "lldb/Utility/ConstString.h"
+#include "lldb/Utility/DataExtractor.h"
+#include "lldb/Utility/Log.h"
+#include "lldb/Utility/RegisterValue.h"
+#include "lldb/Utility/Status.h"
+
+using namespace lldb;
+using namespace lldb_private;
+
+LLDB_PLUGIN_DEFINE(ABISysV_ppc)
+
+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_f0,
+ dwarf_f1,
+ dwarf_f2,
+ dwarf_f3,
+ dwarf_f4,
+ dwarf_f5,
+ dwarf_f6,
+ dwarf_f7,
+ dwarf_f8,
+ dwarf_f9,
+ dwarf_f10,
+ dwarf_f11,
+ dwarf_f12,
+ dwarf_f13,
+ dwarf_f14,
+ dwarf_f15,
+ dwarf_f16,
+ dwarf_f17,
+ dwarf_f18,
+ dwarf_f19,
+ dwarf_f20,
+ dwarf_f21,
+ dwarf_f22,
+ dwarf_f23,
+ dwarf_f24,
+ dwarf_f25,
+ dwarf_f26,
+ dwarf_f27,
+ dwarf_f28,
+ dwarf_f29,
+ dwarf_f30,
+ dwarf_f31,
+ dwarf_cr,
+ dwarf_fpscr,
+ dwarf_xer = 101,
+ dwarf_lr = 108,
+ dwarf_ctr,
+ dwarf_pc,
+ dwarf_cfa,
+};
+
+// Note that the size and offset will be updated by platform-specific classes.
+#define DEFINE_GPR(reg, alt, kind1, kind2, kind3, kind4) \
+ { \
+ #reg, alt, 8, 0, eEncodingUint, eFormatHex, {kind1, kind2, kind3, kind4 }, \
+ nullptr, nullptr, nullptr, 0 \
+ }
+
+static const RegisterInfo g_register_infos[] = {
+ // General purpose registers. eh_frame, DWARF,
+ // Generic, Process Plugin
+ DEFINE_GPR(r0, nullptr, dwarf_r0, dwarf_r0, LLDB_INVALID_REGNUM,
+ LLDB_INVALID_REGNUM),
+ DEFINE_GPR(r1, "sp", dwarf_r1, dwarf_r1, LLDB_REGNUM_GENERIC_SP,
+ LLDB_INVALID_REGNUM),
+ DEFINE_GPR(r2, nullptr, dwarf_r2, dwarf_r2, LLDB_INVALID_REGNUM,
+ LLDB_INVALID_REGNUM),
+ DEFINE_GPR(r3, "arg1", dwarf_r3, dwarf_r3, LLDB_REGNUM_GENERIC_ARG1,
+ LLDB_INVALID_REGNUM),
+ DEFINE_GPR(r4, "arg2", dwarf_r4, dwarf_r4, LLDB_REGNUM_GENERIC_ARG2,
+ LLDB_INVALID_REGNUM),
+ DEFINE_GPR(r5, "arg3", dwarf_r5, dwarf_r5, LLDB_REGNUM_GENERIC_ARG3,
+ LLDB_INVALID_REGNUM),
+ DEFINE_GPR(r6, "arg4", dwarf_r6, dwarf_r6, LLDB_REGNUM_GENERIC_ARG4,
+ LLDB_INVALID_REGNUM),
+ DEFINE_GPR(r7, "arg5", dwarf_r7, dwarf_r7, LLDB_REGNUM_GENERIC_ARG5,
+ LLDB_INVALID_REGNUM),
+ DEFINE_GPR(r8, "arg6", dwarf_r8, dwarf_r8, LLDB_REGNUM_GENERIC_ARG6,
+ LLDB_INVALID_REGNUM),
+ DEFINE_GPR(r9, "arg7", dwarf_r9, dwarf_r9, LLDB_REGNUM_GENERIC_ARG7,
+ LLDB_INVALID_REGNUM),
+ DEFINE_GPR(r10, "arg8", dwarf_r10, dwarf_r10, LLDB_REGNUM_GENERIC_ARG8,
+ LLDB_INVALID_REGNUM),
+ DEFINE_GPR(r11, nullptr, dwarf_r11, dwarf_r11, LLDB_INVALID_REGNUM,
+ LLDB_INVALID_REGNUM),
+ DEFINE_GPR(r12, nullptr, dwarf_r12, dwarf_r12, LLDB_INVALID_REGNUM,
+ LLDB_INVALID_REGNUM),
+ DEFINE_GPR(r13, nullptr, dwarf_r13, dwarf_r13, LLDB_INVALID_REGNUM,
+ LLDB_INVALID_REGNUM),
+ DEFINE_GPR(r14, nullptr, dwarf_r14, dwarf_r14, LLDB_INVALID_REGNUM,
+ LLDB_INVALID_REGNUM),
+ DEFINE_GPR(r15, nullptr, dwarf_r15, dwarf_r15, LLDB_INVALID_REGNUM,
+ LLDB_INVALID_REGNUM),
+ DEFINE_GPR(r16, nullptr, dwarf_r16, dwarf_r16, LLDB_INVALID_REGNUM,
+ LLDB_INVALID_REGNUM),
+ DEFINE_GPR(r17, nullptr, dwarf_r17, dwarf_r17, LLDB_INVALID_REGNUM,
+ LLDB_INVALID_REGNUM),
+ DEFINE_GPR(r18, nullptr, dwarf_r18, dwarf_r18, LLDB_INVALID_REGNUM,
+ LLDB_INVALID_REGNUM),
+ DEFINE_GPR(r19, nullptr, dwarf_r19, dwarf_r19, LLDB_INVALID_REGNUM,
+ LLDB_INVALID_REGNUM),
+ DEFINE_GPR(r20, nullptr, dwarf_r20, dwarf_r20, LLDB_INVALID_REGNUM,
+ LLDB_INVALID_REGNUM),
+ DEFINE_GPR(r21, nullptr, dwarf_r21, dwarf_r21, LLDB_INVALID_REGNUM,
+ LLDB_INVALID_REGNUM),
+ DEFINE_GPR(r22, nullptr, dwarf_r22, dwarf_r22, LLDB_INVALID_REGNUM,
+ LLDB_INVALID_REGNUM),
+ DEFINE_GPR(r23, nullptr, dwarf_r23, dwarf_r23, LLDB_INVALID_REGNUM,
+ LLDB_INVALID_REGNUM),
+ DEFINE_GPR(r24, nullptr, dwarf_r24, dwarf_r24, LLDB_INVALID_REGNUM,
+ LLDB_INVALID_REGNUM),
+ DEFINE_GPR(r25, nullptr, dwarf_r25, dwarf_r25, LLDB_INVALID_REGNUM,
+ LLDB_INVALID_REGNUM),
+ DEFINE_GPR(r26, nullptr, dwarf_r26, dwarf_r26, LLDB_INVALID_REGNUM,
+ LLDB_INVALID_REGNUM),
+ DEFINE_GPR(r27, nullptr, dwarf_r27, dwarf_r27, LLDB_INVALID_REGNUM,
+ LLDB_INVALID_REGNUM),
+ DEFINE_GPR(r28, nullptr, dwarf_r28, dwarf_r28, LLDB_INVALID_REGNUM,
+ LLDB_INVALID_REGNUM),
+ DEFINE_GPR(r29, nullptr, dwarf_r29, dwarf_r29, LLDB_INVALID_REGNUM,
+ LLDB_INVALID_REGNUM),
+ DEFINE_GPR(r30, nullptr, dwarf_r30, dwarf_r30, LLDB_INVALID_REGNUM,
+ LLDB_INVALID_REGNUM),
+ DEFINE_GPR(r31, nullptr, dwarf_r31, dwarf_r31, LLDB_INVALID_REGNUM,
+ LLDB_INVALID_REGNUM),
+ DEFINE_GPR(lr, "lr", dwarf_lr, dwarf_lr, LLDB_REGNUM_GENERIC_RA,
+ LLDB_INVALID_REGNUM),
+ DEFINE_GPR(cr, "cr", dwarf_cr, dwarf_cr, LLDB_REGNUM_GENERIC_FLAGS,
+ LLDB_INVALID_REGNUM),
+ DEFINE_GPR(xer, "xer", dwarf_xer, dwarf_xer, LLDB_INVALID_REGNUM,
+ LLDB_INVALID_REGNUM),
+ DEFINE_GPR(ctr, "ctr", dwarf_ctr, dwarf_ctr, LLDB_INVALID_REGNUM,
+ LLDB_INVALID_REGNUM),
+ DEFINE_GPR(pc, "pc", dwarf_pc, dwarf_pc, LLDB_REGNUM_GENERIC_PC,
+ LLDB_INVALID_REGNUM),
+ {nullptr,
+ nullptr,
+ 8,
+ 0,
+ eEncodingUint,
+ eFormatHex,
+ {dwarf_cfa, dwarf_cfa, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM},
+ nullptr,
+ nullptr,
+ nullptr,
+ 0}};
+
+static const uint32_t k_num_register_infos =
+ llvm::array_lengthof(g_register_infos);
+
+const lldb_private::RegisterInfo *
+ABISysV_ppc::GetRegisterInfoArray(uint32_t &count) {
+ count = k_num_register_infos;
+ return g_register_infos;
+}
+
+size_t ABISysV_ppc::GetRedZoneSize() const { return 224; }
+
+// Static Functions
+
+ABISP
+ABISysV_ppc::CreateInstance(lldb::ProcessSP process_sp, const ArchSpec &arch) {
+ if (arch.GetTriple().getArch() == llvm::Triple::ppc) {
+ return ABISP(
+ new ABISysV_ppc(std::move(process_sp), MakeMCRegisterInfo(arch)));
+ }
+ return ABISP();
+}
+
+bool ABISysV_ppc::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_ppc::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%" PRIu64 " = 0x%" PRIx64, static_cast<uint64_t>(i + 1),
+ args[i]);
+ s.PutCString(")");
+ log->PutString(s.GetString());
+ }
+
+ RegisterContext *reg_ctx = thread.GetRegisterContext().get();
+ if (!reg_ctx)
+ return false;
+
+ const RegisterInfo *reg_info = nullptr;
+
+ 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);
+ LLDB_LOGF(log, "About to write arg%" PRIu64 " (0x%" PRIx64 ") into %s",
+ static_cast<uint64_t>(i + 1), args[i], reg_info->name);
+ if (!reg_ctx->WriteRegisterFromUnsigned(reg_info, args[i]))
+ return false;
+ }
+
+ // First, align the SP
+
+ LLDB_LOGF(log, "16-byte aligning SP: 0x%" PRIx64 " to 0x%" PRIx64,
+ (uint64_t)sp, (uint64_t)(sp & ~0xfull));
+
+ sp &= ~(0xfull); // 16-byte alignment
+
+ sp -= 8;
+
+ Status 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);
+ ProcessSP process_sp(thread.GetProcess());
+
+ RegisterValue reg_value;
+
+ LLDB_LOGF(log,
+ "Pushing the return address onto the stack: 0x%" PRIx64
+ ": 0x%" PRIx64,
+ (uint64_t)sp, (uint64_t)return_addr);
+
+ // Save return address onto the stack
+ if (!process_sp->WritePointerToMemory(sp, return_addr, error))
+ return false;
+
+ // %r1 is set to the actual stack value.
+
+ LLDB_LOGF(log, "Writing SP: 0x%" PRIx64, (uint64_t)sp);
+
+ if (!reg_ctx->WriteRegisterFromUnsigned(sp_reg_info, sp))
+ return false;
+
+ // %pc is set to the address of the called function.
+
+ LLDB_LOGF(log, "Writing IP: 0x%" PRIx64, (uint64_t)func_addr);
+
+ if (!reg_ctx->WriteRegisterFromUnsigned(pc_reg_info, func_addr))
+ return false;
+
+ return true;
+}
+
+static bool ReadIntegerArgument(Scalar &scalar, unsigned int bit_width,
+ bool is_signed, Thread &thread,
+ uint32_t *argument_register_ids,
+ unsigned int &current_argument_register,
+ addr_t &current_stack_argument) {
+ if (bit_width > 64)
+ return false; // Scalar can't hold large integer arguments
+
+ if (current_argument_register < 6) {
+ scalar = thread.GetRegisterContext()->ReadRegisterAsUnsigned(
+ argument_register_ids[current_argument_register], 0);
+ current_argument_register++;
+ if (is_signed)
+ scalar.SignExtend(bit_width);
+ } else {
+ uint32_t byte_size = (bit_width + (8 - 1)) / 8;
+ Status error;
+ if (thread.GetProcess()->ReadScalarIntegerFromMemory(
+ current_stack_argument, byte_size, is_signed, scalar, error)) {
+ current_stack_argument += byte_size;
+ return true;
+ }
+ return false;
+ }
+ return true;
+}
+
+bool ABISysV_ppc::GetArgumentValues(Thread &thread, ValueList &values) const {
+ unsigned int num_values = values.GetSize();
+ unsigned int value_index;
+
+ // Extract the register context so we can read arguments from registers
+
+ RegisterContext *reg_ctx = thread.GetRegisterContext().get();
+
+ if (!reg_ctx)
+ return false;
+
+ // Get the pointer to the first stack argument so we have a place to start
+ // when reading data
+
+ addr_t sp = reg_ctx->GetSP(0);
+
+ if (!sp)
+ return false;
+
+ addr_t current_stack_argument = sp + 48; // jump over return address
+
+ uint32_t argument_register_ids[8];
+
+ argument_register_ids[0] =
+ reg_ctx->GetRegisterInfo(eRegisterKindGeneric, LLDB_REGNUM_GENERIC_ARG1)
+ ->kinds[eRegisterKindLLDB];
+ argument_register_ids[1] =
+ reg_ctx->GetRegisterInfo(eRegisterKindGeneric, LLDB_REGNUM_GENERIC_ARG2)
+ ->kinds[eRegisterKindLLDB];
+ argument_register_ids[2] =
+ reg_ctx->GetRegisterInfo(eRegisterKindGeneric, LLDB_REGNUM_GENERIC_ARG3)
+ ->kinds[eRegisterKindLLDB];
+ argument_register_ids[3] =
+ reg_ctx->GetRegisterInfo(eRegisterKindGeneric, LLDB_REGNUM_GENERIC_ARG4)
+ ->kinds[eRegisterKindLLDB];
+ argument_register_ids[4] =
+ reg_ctx->GetRegisterInfo(eRegisterKindGeneric, LLDB_REGNUM_GENERIC_ARG5)
+ ->kinds[eRegisterKindLLDB];
+ argument_register_ids[5] =
+ reg_ctx->GetRegisterInfo(eRegisterKindGeneric, LLDB_REGNUM_GENERIC_ARG6)
+ ->kinds[eRegisterKindLLDB];
+ argument_register_ids[6] =
+ reg_ctx->GetRegisterInfo(eRegisterKindGeneric, LLDB_REGNUM_GENERIC_ARG7)
+ ->kinds[eRegisterKindLLDB];
+ argument_register_ids[7] =
+ reg_ctx->GetRegisterInfo(eRegisterKindGeneric, LLDB_REGNUM_GENERIC_ARG8)
+ ->kinds[eRegisterKindLLDB];
+
+ unsigned int current_argument_register = 0;
+
+ for (value_index = 0; value_index < num_values; ++value_index) {
+ Value *value = values.GetValueAtIndex(value_index);
+
+ if (!value)
+ return false;
+
+ // We currently only support extracting values with Clang QualTypes. Do we
+ // care about others?
+ CompilerType compiler_type = value->GetCompilerType();
+ llvm::Optional<uint64_t> bit_size = compiler_type.GetBitSize(&thread);
+ if (!bit_size)
+ return false;
+ bool is_signed;
+ if (compiler_type.IsIntegerOrEnumerationType(is_signed))
+ ReadIntegerArgument(value->GetScalar(), *bit_size, is_signed, thread,
+ argument_register_ids, current_argument_register,
+ current_stack_argument);
+ else if (compiler_type.IsPointerType())
+ ReadIntegerArgument(value->GetScalar(), *bit_size, false, thread,
+ argument_register_ids, current_argument_register,
+ current_stack_argument);
+ }
+
+ return true;
+}
+
+Status ABISysV_ppc::SetReturnValueObject(lldb::StackFrameSP &frame_sp,
+ lldb::ValueObjectSP &new_value_sp) {
+ Status 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();
+
+ bool is_signed;
+ uint32_t count;
+ bool is_complex;
+
+ RegisterContext *reg_ctx = thread->GetRegisterContext().get();
+
+ bool set_it_simple = false;
+ if (compiler_type.IsIntegerOrEnumerationType(is_signed) ||
+ compiler_type.IsPointerType()) {
+ const RegisterInfo *reg_info = reg_ctx->GetRegisterInfoByName("r3", 0);
+
+ DataExtractor data;
+ Status 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;
+ }
+ lldb::offset_t offset = 0;
+ if (num_bytes <= 8) {
+ uint64_t raw_value = data.GetMaxU64(&offset, num_bytes);
+
+ if (reg_ctx->WriteRegisterFromUnsigned(reg_info, raw_value))
+ set_it_simple = true;
+ } else {
+ error.SetErrorString("We don't support returning longer than 64 bit "
+ "integer values at present.");
+ }
+ } else if (compiler_type.IsFloatingPointType(count, is_complex)) {
+ if (is_complex)
+ error.SetErrorString(
+ "We don't support returning complex values at present");
+ else {
+ llvm::Optional<uint64_t> bit_width =
+ compiler_type.GetBitSize(frame_sp.get());
+ if (!bit_width) {
+ error.SetErrorString("can't get type size");
+ return error;
+ }
+ if (*bit_width <= 64) {
+ DataExtractor data;
+ Status 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;
+ }
+
+ unsigned char buffer[16];
+ ByteOrder byte_order = data.GetByteOrder();
+
+ data.CopyByteOrderedData(0, num_bytes, buffer, 16, byte_order);
+ set_it_simple = true;
+ } else {
+ // FIXME - don't know how to do 80 bit long doubles yet.
+ error.SetErrorString(
+ "We don't support returning float values > 64 bits at present");
+ }
+ }
+ }
+
+ if (!set_it_simple) {
+ // Okay we've got a structure or something that doesn't fit in a simple
+ // register. We should figure out where it really goes, but we don't
+ // support this yet.
+ error.SetErrorString("We only support setting simple integer and float "
+ "return types at present.");
+ }
+
+ return error;
+}
+
+ValueObjectSP ABISysV_ppc::GetReturnValueObjectSimple(
+ Thread &thread, CompilerType &return_compiler_type) const {
+ ValueObjectSP return_valobj_sp;
+ Value value;
+
+ if (!return_compiler_type)
+ return return_valobj_sp;
+
+ // value.SetContext (Value::eContextTypeClangType, return_value_type);
+ value.SetCompilerType(return_compiler_type);
+
+ RegisterContext *reg_ctx = thread.GetRegisterContext().get();
+ if (!reg_ctx)
+ return return_valobj_sp;
+
+ const uint32_t type_flags = return_compiler_type.GetTypeInfo();
+ if (type_flags & eTypeIsScalar) {
+ value.SetValueType(Value::eValueTypeScalar);
+
+ bool success = false;
+ if (type_flags & eTypeIsInteger) {
+ // Extract the register context so we can read arguments from registers
+
+ llvm::Optional<uint64_t> byte_size =
+ return_compiler_type.GetByteSize(nullptr);
+ if (!byte_size)
+ return return_valobj_sp;
+ uint64_t raw_value = thread.GetRegisterContext()->ReadRegisterAsUnsigned(
+ reg_ctx->GetRegisterInfoByName("r3", 0), 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 {
+ llvm::Optional<uint64_t> byte_size =
+ return_compiler_type.GetByteSize(nullptr);
+ if (byte_size && *byte_size <= sizeof(long double)) {
+ const RegisterInfo *f1_info = reg_ctx->GetRegisterInfoByName("f1", 0);
+ RegisterValue f1_value;
+ if (reg_ctx->ReadRegister(f1_info, f1_value)) {
+ DataExtractor data;
+ if (f1_value.GetData(data)) {
+ lldb::offset_t offset = 0;
+ if (*byte_size == sizeof(float)) {
+ value.GetScalar() = (float)data.GetFloat(&offset);
+ success = true;
+ } else if (*byte_size == sizeof(double)) {
+ value.GetScalar() = (double)data.GetDouble(&offset);
+ success = true;
+ }
+ }
+ }
+ }
+ }
+ }
+
+ if (success)
+ return_valobj_sp = ValueObjectConstResult::Create(
+ thread.GetStackFrameAtIndex(0).get(), value, ConstString(""));
+ } else if (type_flags & eTypeIsPointer) {
+ unsigned r3_id =
+ reg_ctx->GetRegisterInfoByName("r3", 0)->kinds[eRegisterKindLLDB];
+ value.GetScalar() =
+ (uint64_t)thread.GetRegisterContext()->ReadRegisterAsUnsigned(r3_id, 0);
+ value.SetValueType(Value::eValueTypeScalar);
+ return_valobj_sp = ValueObjectConstResult::Create(
+ thread.GetStackFrameAtIndex(0).get(), value, ConstString(""));
+ } else if (type_flags & eTypeIsVector) {
+ llvm::Optional<uint64_t> byte_size =
+ return_compiler_type.GetByteSize(nullptr);
+ if (byte_size && *byte_size > 0) {
+ const RegisterInfo *altivec_reg = reg_ctx->GetRegisterInfoByName("v2", 0);
+ if (altivec_reg) {
+ if (*byte_size <= altivec_reg->byte_size) {
+ ProcessSP process_sp(thread.GetProcess());
+ if (process_sp) {
+ std::unique_ptr<DataBufferHeap> heap_data_up(
+ new DataBufferHeap(*byte_size, 0));
+ const ByteOrder byte_order = process_sp->GetByteOrder();
+ RegisterValue reg_value;
+ if (reg_ctx->ReadRegister(altivec_reg, reg_value)) {
+ Status error;
+ if (reg_value.GetAsMemoryData(
+ altivec_reg, heap_data_up->GetBytes(),
+ heap_data_up->GetByteSize(), byte_order, error)) {
+ DataExtractor data(DataBufferSP(heap_data_up.release()),
+ byte_order,
+ process_sp->GetTarget()
+ .GetArchitecture()
+ .GetAddressByteSize());
+ return_valobj_sp = ValueObjectConstResult::Create(
+ &thread, return_compiler_type, ConstString(""), data);
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+
+ return return_valobj_sp;
+}
+
+ValueObjectSP ABISysV_ppc::GetReturnValueObjectImpl(
+ Thread &thread, CompilerType &return_compiler_type) const {
+ ValueObjectSP return_valobj_sp;
+
+ if (!return_compiler_type)
+ return return_valobj_sp;
+
+ ExecutionContext exe_ctx(thread.shared_from_this());
+ return_valobj_sp = GetReturnValueObjectSimple(thread, return_compiler_type);
+ if (return_valobj_sp)
+ return return_valobj_sp;
+
+ RegisterContextSP reg_ctx_sp = thread.GetRegisterContext();
+ if (!reg_ctx_sp)
+ return return_valobj_sp;
+
+ llvm::Optional<uint64_t> bit_width = return_compiler_type.GetBitSize(&thread);
+ if (!bit_width)
+ return return_valobj_sp;
+ if (return_compiler_type.IsAggregateType()) {
+ Target *target = exe_ctx.GetTargetPtr();
+ bool is_memory = true;
+ if (*bit_width <= 128) {
+ ByteOrder target_byte_order = target->GetArchitecture().GetByteOrder();
+ DataBufferSP data_sp(new DataBufferHeap(16, 0));
+ DataExtractor return_ext(data_sp, target_byte_order,
+ target->GetArchitecture().GetAddressByteSize());
+
+ const RegisterInfo *r3_info = reg_ctx_sp->GetRegisterInfoByName("r3", 0);
+ const RegisterInfo *rdx_info =
+ reg_ctx_sp->GetRegisterInfoByName("rdx", 0);
+
+ RegisterValue r3_value, rdx_value;
+ reg_ctx_sp->ReadRegister(r3_info, r3_value);
+ reg_ctx_sp->ReadRegister(rdx_info, rdx_value);
+
+ DataExtractor r3_data, rdx_data;
+
+ r3_value.GetData(r3_data);
+ rdx_value.GetData(rdx_data);
+
+ uint32_t fp_bytes =
+ 0; // Tracks how much of the xmm registers we've consumed so far
+ uint32_t integer_bytes =
+ 0; // Tracks how much of the r3/rds registers we've consumed so far
+
+ const uint32_t num_children = return_compiler_type.GetNumFields();
+
+ // Since we are in the small struct regime, assume we are not in memory.
+ is_memory = false;
+
+ for (uint32_t idx = 0; idx < num_children; idx++) {
+ std::string name;
+ uint64_t field_bit_offset = 0;
+ bool is_signed;
+ bool is_complex;
+ uint32_t count;
+
+ CompilerType field_compiler_type = return_compiler_type.GetFieldAtIndex(
+ idx, name, &field_bit_offset, nullptr, nullptr);
+ llvm::Optional<uint64_t> field_bit_width =
+ field_compiler_type.GetBitSize(&thread);
+ if (!field_bit_width)
+ return return_valobj_sp;
+
+ // If there are any unaligned fields, this is stored in memory.
+ if (field_bit_offset % *field_bit_width != 0) {
+ is_memory = true;
+ break;
+ }
+
+ uint32_t field_byte_width = *field_bit_width / 8;
+ uint32_t field_byte_offset = field_bit_offset / 8;
+
+ DataExtractor *copy_from_extractor = nullptr;
+ uint32_t copy_from_offset = 0;
+
+ if (field_compiler_type.IsIntegerOrEnumerationType(is_signed) ||
+ field_compiler_type.IsPointerType()) {
+ if (integer_bytes < 8) {
+ if (integer_bytes + field_byte_width <= 8) {
+ // This is in RAX, copy from register to our result structure:
+ copy_from_extractor = &r3_data;
+ copy_from_offset = integer_bytes;
+ integer_bytes += field_byte_width;
+ } else {
+ // The next field wouldn't fit in the remaining space, so we
+ // pushed it to rdx.
+ copy_from_extractor = &rdx_data;
+ copy_from_offset = 0;
+ integer_bytes = 8 + field_byte_width;
+ }
+ } else if (integer_bytes + field_byte_width <= 16) {
+ copy_from_extractor = &rdx_data;
+ copy_from_offset = integer_bytes - 8;
+ integer_bytes += field_byte_width;
+ } else {
+ // The last field didn't fit. I can't see how that would happen
+ // w/o the overall size being greater than 16 bytes. For now,
+ // return a nullptr return value object.
+ return return_valobj_sp;
+ }
+ } else if (field_compiler_type.IsFloatingPointType(count, is_complex)) {
+ // Structs with long doubles are always passed in memory.
+ if (*field_bit_width == 128) {
+ is_memory = true;
+ break;
+ } else if (*field_bit_width == 64) {
+ copy_from_offset = 0;
+ fp_bytes += field_byte_width;
+ } else if (*field_bit_width == 32) {
+ // This one is kind of complicated. If we are in an "eightbyte"
+ // with another float, we'll be stuffed into an xmm register with
+ // it. If we are in an "eightbyte" with one or more ints, then we
+ // will be stuffed into the appropriate GPR with them.
+ bool in_gpr;
+ if (field_byte_offset % 8 == 0) {
+ // We are at the beginning of one of the eightbytes, so check the
+ // next element (if any)
+ if (idx == num_children - 1)
+ in_gpr = false;
+ else {
+ uint64_t next_field_bit_offset = 0;
+ CompilerType next_field_compiler_type =
+ return_compiler_type.GetFieldAtIndex(idx + 1, name,
+ &next_field_bit_offset,
+ nullptr, nullptr);
+ if (next_field_compiler_type.IsIntegerOrEnumerationType(
+ is_signed))
+ in_gpr = true;
+ else {
+ copy_from_offset = 0;
+ in_gpr = false;
+ }
+ }
+ } else if (field_byte_offset % 4 == 0) {
+ // We are inside of an eightbyte, so see if the field before us
+ // is floating point: This could happen if somebody put padding
+ // in the structure.
+ if (idx == 0)
+ in_gpr = false;
+ else {
+ uint64_t prev_field_bit_offset = 0;
+ CompilerType prev_field_compiler_type =
+ return_compiler_type.GetFieldAtIndex(idx - 1, name,
+ &prev_field_bit_offset,
+ nullptr, nullptr);
+ if (prev_field_compiler_type.IsIntegerOrEnumerationType(
+ is_signed))
+ in_gpr = true;
+ else {
+ copy_from_offset = 4;
+ in_gpr = false;
+ }
+ }
+ } else {
+ is_memory = true;
+ continue;
+ }
+
+ // Okay, we've figured out whether we are in GPR or XMM, now figure
+ // out which one.
+ if (in_gpr) {
+ if (integer_bytes < 8) {
+ // This is in RAX, copy from register to our result structure:
+ copy_from_extractor = &r3_data;
+ copy_from_offset = integer_bytes;
+ integer_bytes += field_byte_width;
+ } else {
+ copy_from_extractor = &rdx_data;
+ copy_from_offset = integer_bytes - 8;
+ integer_bytes += field_byte_width;
+ }
+ } else {
+ fp_bytes += field_byte_width;
+ }
+ }
+ }
+
+ // These two tests are just sanity checks. If I somehow get the type
+ // calculation wrong above it is better to just return nothing than to
+ // assert or crash.
+ if (!copy_from_extractor)
+ return return_valobj_sp;
+ if (copy_from_offset + field_byte_width >
+ copy_from_extractor->GetByteSize())
+ return return_valobj_sp;
+
+ copy_from_extractor->CopyByteOrderedData(
+ copy_from_offset, field_byte_width,
+ data_sp->GetBytes() + field_byte_offset, field_byte_width,
+ target_byte_order);
+ }
+
+ if (!is_memory) {
+ // The result is in our data buffer. Let's make a variable object out
+ // of it:
+ return_valobj_sp = ValueObjectConstResult::Create(
+ &thread, return_compiler_type, ConstString(""), return_ext);
+ }
+ }
+
+ // FIXME: This is just taking a guess, r3 may very well no longer hold the
+ // return storage location.
+ // If we are going to do this right, when we make a new frame we should
+ // check to see if it uses a memory return, and if we are at the first
+ // instruction and if so stash away the return location. Then we would
+ // only return the memory return value if we know it is valid.
+
+ if (is_memory) {
+ unsigned r3_id =
+ reg_ctx_sp->GetRegisterInfoByName("r3", 0)->kinds[eRegisterKindLLDB];
+ lldb::addr_t storage_addr =
+ (uint64_t)thread.GetRegisterContext()->ReadRegisterAsUnsigned(r3_id,
+ 0);
+ return_valobj_sp = ValueObjectMemory::Create(
+ &thread, "", Address(storage_addr, nullptr), return_compiler_type);
+ }
+ }
+
+ return return_valobj_sp;
+}
+
+bool ABISysV_ppc::CreateFunctionEntryUnwindPlan(UnwindPlan &unwind_plan) {
+ unwind_plan.Clear();
+ unwind_plan.SetRegisterKind(eRegisterKindDWARF);
+
+ uint32_t lr_reg_num = dwarf_lr;
+ uint32_t sp_reg_num = dwarf_r1;
+ uint32_t pc_reg_num = dwarf_pc;
+
+ UnwindPlan::RowSP row(new UnwindPlan::Row);
+
+ // Our Call Frame Address is the stack pointer value
+ row->GetCFAValue().SetIsRegisterPlusOffset(sp_reg_num, 0);
+
+ // The previous PC is in the LR
+ row->SetRegisterLocationToRegister(pc_reg_num, lr_reg_num, true);
+ unwind_plan.AppendRow(row);
+
+ // All other registers are the same.
+
+ unwind_plan.SetSourceName("ppc at-func-entry default");
+ unwind_plan.SetSourcedFromCompiler(eLazyBoolNo);
+
+ return true;
+}
+
+bool ABISysV_ppc::CreateDefaultUnwindPlan(UnwindPlan &unwind_plan) {
+ unwind_plan.Clear();
+ unwind_plan.SetRegisterKind(eRegisterKindDWARF);
+
+ uint32_t sp_reg_num = dwarf_r1;
+ uint32_t pc_reg_num = dwarf_lr;
+
+ UnwindPlan::RowSP row(new UnwindPlan::Row);
+
+ const int32_t ptr_size = 4;
+ row->GetCFAValue().SetIsRegisterDereferenced(sp_reg_num);
+
+ row->SetRegisterLocationToAtCFAPlusOffset(pc_reg_num, ptr_size * 1, true);
+ row->SetRegisterLocationToIsCFAPlusOffset(sp_reg_num, 0, true);
+
+ unwind_plan.AppendRow(row);
+ unwind_plan.SetSourceName("ppc default unwind plan");
+ unwind_plan.SetSourcedFromCompiler(eLazyBoolNo);
+ unwind_plan.SetUnwindPlanValidAtAllInstructions(eLazyBoolNo);
+ unwind_plan.SetUnwindPlanForSignalTrap(eLazyBoolNo);
+ unwind_plan.SetReturnAddressRegister(dwarf_lr);
+ return true;
+}
+
+bool ABISysV_ppc::RegisterIsVolatile(const RegisterInfo *reg_info) {
+ return !RegisterIsCalleeSaved(reg_info);
+}
+
+// See "Register Usage" in the
+// "System V Application Binary Interface"
+// "64-bit PowerPC ELF Application Binary Interface Supplement" current version
+// is 1.9 released 2004 at http://refspecs.linuxfoundation.org/ELF/ppc/PPC-
+// elf64abi-1.9.pdf
+
+bool ABISysV_ppc::RegisterIsCalleeSaved(const RegisterInfo *reg_info) {
+ if (reg_info) {
+ // Preserved registers are :
+ // r1,r2,r13-r31
+ // f14-f31 (not yet)
+ // v20-v31 (not yet)
+ // vrsave (not yet)
+
+ const char *name = reg_info->name;
+ if (name[0] == 'r') {
+ if ((name[1] == '1' || name[1] == '2') && name[2] == '\0')
+ return true;
+ if (name[1] == '1' && name[2] > '2')
+ return true;
+ if ((name[1] == '2' || name[1] == '3') && name[2] != '\0')
+ return true;
+ }
+
+ if (name[0] == 'f' && name[1] >= '0' && name[1] <= '9') {
+ if (name[3] == '1' && name[4] >= '4')
+ return true;
+ if ((name[3] == '2' || name[3] == '3') && name[4] != '\0')
+ return true;
+ }
+
+ if (name[0] == 's' && name[1] == 'p' && name[2] == '\0') // sp
+ return true;
+ if (name[0] == 'f' && name[1] == 'p' && name[2] == '\0') // fp
+ return true;
+ if (name[0] == 'p' && name[1] == 'c' && name[2] == '\0') // pc
+ return true;
+ }
+ return false;
+}
+
+void ABISysV_ppc::Initialize() {
+ PluginManager::RegisterPlugin(GetPluginNameStatic(),
+ "System V ABI for ppc targets", CreateInstance);
+}
+
+void ABISysV_ppc::Terminate() {
+ PluginManager::UnregisterPlugin(CreateInstance);
+}
+
+lldb_private::ConstString ABISysV_ppc::GetPluginNameStatic() {
+ static ConstString g_name("sysv-ppc");
+ return g_name;
+}
+
+// PluginInterface protocol
+
+lldb_private::ConstString ABISysV_ppc::GetPluginName() {
+ return GetPluginNameStatic();
+}
+
+uint32_t ABISysV_ppc::GetPluginVersion() { return 1; }
diff --git a/lldb/source/Plugins/ABI/PowerPC/ABISysV_ppc.h b/lldb/source/Plugins/ABI/PowerPC/ABISysV_ppc.h
new file mode 100644
index 0000000000000..4a586849e5857
--- /dev/null
+++ b/lldb/source/Plugins/ABI/PowerPC/ABISysV_ppc.h
@@ -0,0 +1,102 @@
+//===-- ABISysV_ppc.h ----------------------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLDB_SOURCE_PLUGINS_ABI_POWERPC_ABISYSV_PPC_H
+#define LLDB_SOURCE_PLUGINS_ABI_POWERPC_ABISYSV_PPC_H
+
+#include "lldb/Target/ABI.h"
+#include "lldb/lldb-private.h"
+
+class ABISysV_ppc : public lldb_private::RegInfoBasedABI {
+public:
+ ~ABISysV_ppc() override = default;
+
+ size_t GetRedZoneSize() const override;
+
+ bool PrepareTrivialCall(lldb_private::Thread &thread, lldb::addr_t sp,
+ lldb::addr_t functionAddress,
+ lldb::addr_t returnAddress,
+ llvm::ArrayRef<lldb::addr_t> args) const override;
+
+ bool GetArgumentValues(lldb_private::Thread &thread,
+ lldb_private::ValueList &values) const override;
+
+ lldb_private::Status
+ SetReturnValueObject(lldb::StackFrameSP &frame_sp,
+ lldb::ValueObjectSP &new_value) override;
+
+ lldb::ValueObjectSP
+ GetReturnValueObjectImpl(lldb_private::Thread &thread,
+ lldb_private::CompilerType &type) const override;
+
+ bool
+ CreateFunctionEntryUnwindPlan(lldb_private::UnwindPlan &unwind_plan) override;
+
+ bool CreateDefaultUnwindPlan(lldb_private::UnwindPlan &unwind_plan) override;
+
+ bool RegisterIsVolatile(const lldb_private::RegisterInfo *reg_info) override;
+
+ // The SysV ppc ABI requires that stack frames be 16 byte aligned.
+ // When there is a trap handler on the stack, e.g. _sigtramp in userland
+ // code, we've seen that the stack pointer is often not aligned properly
+ // before the handler is invoked. This means that lldb will stop the unwind
+ // early -- before the function which caused the trap.
+ //
+ // To work around this, we relax that alignment to be just word-size
+ // (8-bytes).
+ // Allowing the trap handlers for user space would be easy (_sigtramp) but
+ // in other environments there can be a large number of different functions
+ // involved in async traps.
+ bool CallFrameAddressIsValid(lldb::addr_t cfa) override {
+ // Make sure the stack call frame addresses are 8 byte aligned
+ if (cfa & (8ull - 1ull))
+ return false; // Not 8 byte aligned
+ if (cfa == 0)
+ return false; // Zero is not a valid stack address
+ return true;
+ }
+
+ bool CodeAddressIsValid(lldb::addr_t pc) override {
+ // We have a 64 bit address space, so anything is valid as opcodes
+ // aren't fixed width...
+ return true;
+ }
+
+ const lldb_private::RegisterInfo *
+ GetRegisterInfoArray(uint32_t &count) override;
+
+ // Static Functions
+
+ static void Initialize();
+
+ static void Terminate();
+
+ static lldb::ABISP CreateInstance(lldb::ProcessSP process_sp, const lldb_private::ArchSpec &arch);
+
+ static lldb_private::ConstString GetPluginNameStatic();
+
+ // PluginInterface protocol
+
+ lldb_private::ConstString GetPluginName() override;
+
+ uint32_t GetPluginVersion() override;
+
+protected:
+ void CreateRegisterMapIfNeeded();
+
+ lldb::ValueObjectSP
+ GetReturnValueObjectSimple(lldb_private::Thread &thread,
+ lldb_private::CompilerType &ast_type) const;
+
+ bool RegisterIsCalleeSaved(const lldb_private::RegisterInfo *reg_info);
+
+private:
+ using lldb_private::RegInfoBasedABI::RegInfoBasedABI; // Call CreateInstance instead.
+};
+
+#endif // LLDB_SOURCE_PLUGINS_ABI_POWERPC_ABISYSV_PPC_H
diff --git a/lldb/source/Plugins/ABI/PowerPC/ABISysV_ppc64.cpp b/lldb/source/Plugins/ABI/PowerPC/ABISysV_ppc64.cpp
new file mode 100644
index 0000000000000..251ac972fd768
--- /dev/null
+++ b/lldb/source/Plugins/ABI/PowerPC/ABISysV_ppc64.cpp
@@ -0,0 +1,1087 @@
+//===-- ABISysV_ppc64.cpp -------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "ABISysV_ppc64.h"
+
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/ADT/Triple.h"
+
+#include "Plugins/TypeSystem/Clang/TypeSystemClang.h"
+#include "Utility/PPC64LE_DWARF_Registers.h"
+#include "Utility/PPC64_DWARF_Registers.h"
+#include "lldb/Core/Module.h"
+#include "lldb/Core/PluginManager.h"
+#include "lldb/Core/Value.h"
+#include "lldb/Core/ValueObjectConstResult.h"
+#include "lldb/Core/ValueObjectMemory.h"
+#include "lldb/Core/ValueObjectRegister.h"
+#include "lldb/Symbol/UnwindPlan.h"
+#include "lldb/Target/Process.h"
+#include "lldb/Target/RegisterContext.h"
+#include "lldb/Target/StackFrame.h"
+#include "lldb/Target/Target.h"
+#include "lldb/Target/Thread.h"
+#include "lldb/Utility/ConstString.h"
+#include "lldb/Utility/DataExtractor.h"
+#include "lldb/Utility/Log.h"
+#include "lldb/Utility/RegisterValue.h"
+#include "lldb/Utility/Status.h"
+
+#include "clang/AST/ASTContext.h"
+#include "clang/AST/Attr.h"
+#include "clang/AST/Decl.h"
+
+#define DECLARE_REGISTER_INFOS_PPC64_STRUCT
+#include "Plugins/Process/Utility/RegisterInfos_ppc64.h"
+#undef DECLARE_REGISTER_INFOS_PPC64_STRUCT
+
+#define DECLARE_REGISTER_INFOS_PPC64LE_STRUCT
+#include "Plugins/Process/Utility/RegisterInfos_ppc64le.h"
+#undef DECLARE_REGISTER_INFOS_PPC64LE_STRUCT
+
+using namespace lldb;
+using namespace lldb_private;
+
+LLDB_PLUGIN_DEFINE(ABISysV_ppc64)
+
+const lldb_private::RegisterInfo *
+ABISysV_ppc64::GetRegisterInfoArray(uint32_t &count) {
+ if (GetByteOrder() == lldb::eByteOrderLittle) {
+ count = llvm::array_lengthof(g_register_infos_ppc64le);
+ return g_register_infos_ppc64le;
+ } else {
+ count = llvm::array_lengthof(g_register_infos_ppc64);
+ return g_register_infos_ppc64;
+ }
+}
+
+size_t ABISysV_ppc64::GetRedZoneSize() const { return 224; }
+
+lldb::ByteOrder ABISysV_ppc64::GetByteOrder() const {
+ return GetProcessSP()->GetByteOrder();
+}
+
+// Static Functions
+
+ABISP
+ABISysV_ppc64::CreateInstance(lldb::ProcessSP process_sp,
+ const ArchSpec &arch) {
+ if (arch.GetTriple().isPPC64())
+ return ABISP(
+ new ABISysV_ppc64(std::move(process_sp), MakeMCRegisterInfo(arch)));
+ return ABISP();
+}
+
+bool ABISysV_ppc64::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_ppc64::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%" PRIu64 " = 0x%" PRIx64, static_cast<uint64_t>(i + 1),
+ args[i]);
+ s.PutCString(")");
+ log->PutString(s.GetString());
+ }
+
+ RegisterContext *reg_ctx = thread.GetRegisterContext().get();
+ if (!reg_ctx)
+ return false;
+
+ const RegisterInfo *reg_info = nullptr;
+
+ 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);
+ LLDB_LOGF(log, "About to write arg%" PRIu64 " (0x%" PRIx64 ") into %s",
+ static_cast<uint64_t>(i + 1), args[i], reg_info->name);
+ if (!reg_ctx->WriteRegisterFromUnsigned(reg_info, args[i]))
+ return false;
+ }
+
+ // First, align the SP
+
+ LLDB_LOGF(log, "16-byte aligning SP: 0x%" PRIx64 " to 0x%" PRIx64,
+ (uint64_t)sp, (uint64_t)(sp & ~0xfull));
+
+ sp &= ~(0xfull); // 16-byte alignment
+
+ sp -= 544; // allocate frame to save TOC, RA and SP.
+
+ Status error;
+ uint64_t reg_value;
+ 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);
+ ProcessSP process_sp(thread.GetProcess());
+ const RegisterInfo *lr_reg_info =
+ reg_ctx->GetRegisterInfo(eRegisterKindGeneric, LLDB_REGNUM_GENERIC_RA);
+ const RegisterInfo *r2_reg_info = reg_ctx->GetRegisterInfoAtIndex(2);
+ const RegisterInfo *r12_reg_info = reg_ctx->GetRegisterInfoAtIndex(12);
+
+ // Save return address onto the stack.
+ LLDB_LOGF(log,
+ "Pushing the return address onto the stack: 0x%" PRIx64
+ "(+16): 0x%" PRIx64,
+ (uint64_t)sp, (uint64_t)return_addr);
+ if (!process_sp->WritePointerToMemory(sp + 16, return_addr, error))
+ return false;
+
+ // Write the return address to link register.
+ LLDB_LOGF(log, "Writing LR: 0x%" PRIx64, (uint64_t)return_addr);
+ if (!reg_ctx->WriteRegisterFromUnsigned(lr_reg_info, return_addr))
+ return false;
+
+ // Write target address to %r12 register.
+ LLDB_LOGF(log, "Writing R12: 0x%" PRIx64, (uint64_t)func_addr);
+ if (!reg_ctx->WriteRegisterFromUnsigned(r12_reg_info, func_addr))
+ return false;
+
+ // Read TOC pointer value.
+ reg_value = reg_ctx->ReadRegisterAsUnsigned(r2_reg_info, 0);
+
+ // Write TOC pointer onto the stack.
+ uint64_t stack_offset;
+ if (GetByteOrder() == lldb::eByteOrderLittle)
+ stack_offset = 24;
+ else
+ stack_offset = 40;
+
+ LLDB_LOGF(log, "Writing R2 (TOC) at SP(0x%" PRIx64 ")+%d: 0x%" PRIx64,
+ (uint64_t)(sp + stack_offset), (int)stack_offset,
+ (uint64_t)reg_value);
+ if (!process_sp->WritePointerToMemory(sp + stack_offset, reg_value, error))
+ return false;
+
+ // Read the current SP value.
+ reg_value = reg_ctx->ReadRegisterAsUnsigned(sp_reg_info, 0);
+
+ // Save current SP onto the stack.
+ LLDB_LOGF(log, "Writing SP at SP(0x%" PRIx64 ")+0: 0x%" PRIx64, (uint64_t)sp,
+ (uint64_t)reg_value);
+ if (!process_sp->WritePointerToMemory(sp, reg_value, error))
+ return false;
+
+ // %r1 is set to the actual stack value.
+ LLDB_LOGF(log, "Writing SP: 0x%" PRIx64, (uint64_t)sp);
+
+ if (!reg_ctx->WriteRegisterFromUnsigned(sp_reg_info, sp))
+ return false;
+
+ // %pc is set to the address of the called function.
+
+ LLDB_LOGF(log, "Writing IP: 0x%" PRIx64, (uint64_t)func_addr);
+
+ if (!reg_ctx->WriteRegisterFromUnsigned(pc_reg_info, func_addr))
+ return false;
+
+ return true;
+}
+
+static bool ReadIntegerArgument(Scalar &scalar, unsigned int bit_width,
+ bool is_signed, Thread &thread,
+ uint32_t *argument_register_ids,
+ unsigned int &current_argument_register,
+ addr_t &current_stack_argument) {
+ if (bit_width > 64)
+ return false; // Scalar can't hold large integer arguments
+
+ if (current_argument_register < 6) {
+ scalar = thread.GetRegisterContext()->ReadRegisterAsUnsigned(
+ argument_register_ids[current_argument_register], 0);
+ current_argument_register++;
+ if (is_signed)
+ scalar.SignExtend(bit_width);
+ } else {
+ uint32_t byte_size = (bit_width + (8 - 1)) / 8;
+ Status error;
+ if (thread.GetProcess()->ReadScalarIntegerFromMemory(
+ current_stack_argument, byte_size, is_signed, scalar, error)) {
+ current_stack_argument += byte_size;
+ return true;
+ }
+ return false;
+ }
+ return true;
+}
+
+bool ABISysV_ppc64::GetArgumentValues(Thread &thread, ValueList &values) const {
+ unsigned int num_values = values.GetSize();
+ unsigned int value_index;
+
+ // Extract the register context so we can read arguments from registers
+
+ RegisterContext *reg_ctx = thread.GetRegisterContext().get();
+
+ if (!reg_ctx)
+ return false;
+
+ // Get the pointer to the first stack argument so we have a place to start
+ // when reading data
+
+ addr_t sp = reg_ctx->GetSP(0);
+
+ if (!sp)
+ return false;
+
+ uint64_t stack_offset;
+ if (GetByteOrder() == lldb::eByteOrderLittle)
+ stack_offset = 32;
+ else
+ stack_offset = 48;
+
+ // jump over return address.
+ addr_t current_stack_argument = sp + stack_offset;
+ uint32_t argument_register_ids[8];
+
+ for (size_t i = 0; i < 8; ++i) {
+ argument_register_ids[i] =
+ reg_ctx
+ ->GetRegisterInfo(eRegisterKindGeneric,
+ LLDB_REGNUM_GENERIC_ARG1 + i)
+ ->kinds[eRegisterKindLLDB];
+ }
+
+ unsigned int current_argument_register = 0;
+
+ for (value_index = 0; value_index < num_values; ++value_index) {
+ Value *value = values.GetValueAtIndex(value_index);
+
+ if (!value)
+ return false;
+
+ // We currently only support extracting values with Clang QualTypes. Do we
+ // care about others?
+ CompilerType compiler_type = value->GetCompilerType();
+ llvm::Optional<uint64_t> bit_size = compiler_type.GetBitSize(&thread);
+ if (!bit_size)
+ return false;
+ bool is_signed;
+
+ if (compiler_type.IsIntegerOrEnumerationType(is_signed)) {
+ ReadIntegerArgument(value->GetScalar(), *bit_size, is_signed, thread,
+ argument_register_ids, current_argument_register,
+ current_stack_argument);
+ } else if (compiler_type.IsPointerType()) {
+ ReadIntegerArgument(value->GetScalar(), *bit_size, false, thread,
+ argument_register_ids, current_argument_register,
+ current_stack_argument);
+ }
+ }
+
+ return true;
+}
+
+Status ABISysV_ppc64::SetReturnValueObject(lldb::StackFrameSP &frame_sp,
+ lldb::ValueObjectSP &new_value_sp) {
+ Status 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();
+
+ bool is_signed;
+ uint32_t count;
+ bool is_complex;
+
+ RegisterContext *reg_ctx = thread->GetRegisterContext().get();
+
+ bool set_it_simple = false;
+ if (compiler_type.IsIntegerOrEnumerationType(is_signed) ||
+ compiler_type.IsPointerType()) {
+ const RegisterInfo *reg_info = reg_ctx->GetRegisterInfoByName("r3", 0);
+
+ DataExtractor data;
+ Status 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;
+ }
+ lldb::offset_t offset = 0;
+ if (num_bytes <= 8) {
+ uint64_t raw_value = data.GetMaxU64(&offset, num_bytes);
+
+ if (reg_ctx->WriteRegisterFromUnsigned(reg_info, raw_value))
+ set_it_simple = true;
+ } else {
+ error.SetErrorString("We don't support returning longer than 64 bit "
+ "integer values at present.");
+ }
+ } else if (compiler_type.IsFloatingPointType(count, is_complex)) {
+ if (is_complex)
+ error.SetErrorString(
+ "We don't support returning complex values at present");
+ else {
+ llvm::Optional<uint64_t> bit_width =
+ compiler_type.GetBitSize(frame_sp.get());
+ if (!bit_width) {
+ error.SetErrorString("can't get size of type");
+ return error;
+ }
+ if (*bit_width <= 64) {
+ DataExtractor data;
+ Status 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;
+ }
+
+ unsigned char buffer[16];
+ ByteOrder byte_order = data.GetByteOrder();
+
+ data.CopyByteOrderedData(0, num_bytes, buffer, 16, byte_order);
+ set_it_simple = true;
+ } else {
+ // FIXME - don't know how to do 80 bit long doubles yet.
+ error.SetErrorString(
+ "We don't support returning float values > 64 bits at present");
+ }
+ }
+ }
+
+ if (!set_it_simple) {
+ // Okay we've got a structure or something that doesn't fit in a simple
+ // register. We should figure out where it really goes, but we don't
+ // support this yet.
+ error.SetErrorString("We only support setting simple integer and float "
+ "return types at present.");
+ }
+
+ return error;
+}
+
+//
+// ReturnValueExtractor
+//
+
+namespace {
+
+#define LOG_PREFIX "ReturnValueExtractor: "
+
+class ReturnValueExtractor {
+ // This class represents a register, from which data may be extracted.
+ //
+ // It may be constructed by directly specifying its index (where 0 is the
+ // first register used to return values) or by specifying the offset of a
+ // given struct field, in which case the appropriated register index will be
+ // calculated.
+ class Register {
+ public:
+ enum Type {
+ GPR, // General Purpose Register
+ FPR // Floating Point Register
+ };
+
+ // main constructor
+ //
+ // offs - field offset in struct
+ Register(Type ty, uint32_t index, uint32_t offs, RegisterContext *reg_ctx,
+ ByteOrder byte_order)
+ : m_index(index), m_offs(offs % sizeof(uint64_t)),
+ m_avail(sizeof(uint64_t) - m_offs), m_type(ty), m_reg_ctx(reg_ctx),
+ m_byte_order(byte_order) {}
+
+ // explicit index, no offset
+ Register(Type ty, uint32_t index, RegisterContext *reg_ctx,
+ ByteOrder byte_order)
+ : Register(ty, index, 0, reg_ctx, byte_order) {}
+
+ // GPR, calculate index from offs
+ Register(uint32_t offs, RegisterContext *reg_ctx, ByteOrder byte_order)
+ : Register(GPR, offs / sizeof(uint64_t), offs, reg_ctx, byte_order) {}
+
+ uint32_t Index() const { return m_index; }
+
+ // register offset where data is located
+ uint32_t Offs() const { return m_offs; }
+
+ // available bytes in this register
+ uint32_t Avail() const { return m_avail; }
+
+ bool IsValid() const {
+ if (m_index > 7) {
+ LLDB_LOG(m_log, LOG_PREFIX
+ "No more than 8 registers should be used to return values");
+ return false;
+ }
+ return true;
+ }
+
+ std::string GetName() const {
+ if (m_type == GPR)
+ return ("r" + llvm::Twine(m_index + 3)).str();
+ else
+ return ("f" + llvm::Twine(m_index + 1)).str();
+ }
+
+ // get raw register data
+ bool GetRawData(uint64_t &raw_data) {
+ const RegisterInfo *reg_info =
+ m_reg_ctx->GetRegisterInfoByName(GetName());
+ if (!reg_info) {
+ LLDB_LOG(m_log, LOG_PREFIX "Failed to get RegisterInfo");
+ return false;
+ }
+
+ RegisterValue reg_val;
+ if (!m_reg_ctx->ReadRegister(reg_info, reg_val)) {
+ LLDB_LOG(m_log, LOG_PREFIX "ReadRegister() failed");
+ return false;
+ }
+
+ Status error;
+ uint32_t rc = reg_val.GetAsMemoryData(
+ reg_info, &raw_data, sizeof(raw_data), m_byte_order, error);
+ if (rc != sizeof(raw_data)) {
+ LLDB_LOG(m_log, LOG_PREFIX "GetAsMemoryData() failed");
+ return false;
+ }
+
+ return true;
+ }
+
+ private:
+ uint32_t m_index;
+ uint32_t m_offs;
+ uint32_t m_avail;
+ Type m_type;
+ RegisterContext *m_reg_ctx;
+ ByteOrder m_byte_order;
+ Log *m_log =
+ lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS);
+ };
+
+ Register GetGPR(uint32_t index) const {
+ return Register(Register::GPR, index, m_reg_ctx, m_byte_order);
+ }
+
+ Register GetFPR(uint32_t index) const {
+ return Register(Register::FPR, index, m_reg_ctx, m_byte_order);
+ }
+
+ Register GetGPRByOffs(uint32_t offs) const {
+ return Register(offs, m_reg_ctx, m_byte_order);
+ }
+
+public:
+ // factory
+ static llvm::Expected<ReturnValueExtractor> Create(Thread &thread,
+ CompilerType &type) {
+ RegisterContext *reg_ctx = thread.GetRegisterContext().get();
+ if (!reg_ctx)
+ return llvm::make_error<llvm::StringError>(
+ LOG_PREFIX "Failed to get RegisterContext",
+ llvm::inconvertibleErrorCode());
+
+ ProcessSP process_sp = thread.GetProcess();
+ if (!process_sp)
+ return llvm::make_error<llvm::StringError>(
+ LOG_PREFIX "GetProcess() failed", llvm::inconvertibleErrorCode());
+
+ return ReturnValueExtractor(thread, type, reg_ctx, process_sp);
+ }
+
+ // main method: get value of the type specified at construction time
+ ValueObjectSP GetValue() {
+ const uint32_t type_flags = m_type.GetTypeInfo();
+
+ // call the appropriate type handler
+ ValueSP value_sp;
+ ValueObjectSP valobj_sp;
+ if (type_flags & eTypeIsScalar) {
+ if (type_flags & eTypeIsInteger) {
+ value_sp = GetIntegerValue(0);
+ } else if (type_flags & eTypeIsFloat) {
+ if (type_flags & eTypeIsComplex) {
+ LLDB_LOG(m_log, LOG_PREFIX "Complex numbers are not supported yet");
+ return ValueObjectSP();
+ } else {
+ value_sp = GetFloatValue(m_type, 0);
+ }
+ }
+ } else if (type_flags & eTypeIsPointer) {
+ value_sp = GetPointerValue(0);
+ }
+
+ if (value_sp) {
+ valobj_sp = ValueObjectConstResult::Create(
+ m_thread.GetStackFrameAtIndex(0).get(), *value_sp, ConstString(""));
+ } else if (type_flags & eTypeIsVector) {
+ valobj_sp = GetVectorValueObject();
+ } else if (type_flags & eTypeIsStructUnion || type_flags & eTypeIsClass) {
+ valobj_sp = GetStructValueObject();
+ }
+
+ return valobj_sp;
+ }
+
+private:
+ // data
+ Thread &m_thread;
+ CompilerType &m_type;
+ uint64_t m_byte_size;
+ std::unique_ptr<DataBufferHeap> m_data_up;
+ int32_t m_src_offs = 0;
+ int32_t m_dst_offs = 0;
+ bool m_packed = false;
+ Log *m_log = lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS);
+ RegisterContext *m_reg_ctx;
+ ProcessSP m_process_sp;
+ ByteOrder m_byte_order;
+ uint32_t m_addr_size;
+
+ // methods
+
+ // constructor
+ ReturnValueExtractor(Thread &thread, CompilerType &type,
+ RegisterContext *reg_ctx, ProcessSP process_sp)
+ : m_thread(thread), m_type(type),
+ m_byte_size(m_type.GetByteSize(nullptr).getValueOr(0)),
+ m_data_up(new DataBufferHeap(m_byte_size, 0)), m_reg_ctx(reg_ctx),
+ m_process_sp(process_sp), m_byte_order(process_sp->GetByteOrder()),
+ m_addr_size(
+ process_sp->GetTarget().GetArchitecture().GetAddressByteSize()) {}
+
+ // build a new scalar value
+ ValueSP NewScalarValue(CompilerType &type) {
+ ValueSP value_sp(new Value);
+ value_sp->SetCompilerType(type);
+ value_sp->SetValueType(Value::eValueTypeScalar);
+ return value_sp;
+ }
+
+ // get an integer value in the specified register
+ ValueSP GetIntegerValue(uint32_t reg_index) {
+ uint64_t raw_value;
+ auto reg = GetGPR(reg_index);
+ if (!reg.GetRawData(raw_value))
+ return ValueSP();
+
+ // build value from data
+ ValueSP value_sp(NewScalarValue(m_type));
+
+ uint32_t type_flags = m_type.GetTypeInfo();
+ bool is_signed = (type_flags & eTypeIsSigned) != 0;
+
+ switch (m_byte_size) {
+ case sizeof(uint64_t):
+ if (is_signed)
+ value_sp->GetScalar() = (int64_t)(raw_value);
+ else
+ value_sp->GetScalar() = (uint64_t)(raw_value);
+ break;
+
+ case sizeof(uint32_t):
+ if (is_signed)
+ value_sp->GetScalar() = (int32_t)(raw_value & UINT32_MAX);
+ else
+ value_sp->GetScalar() = (uint32_t)(raw_value & UINT32_MAX);
+ break;
+
+ case sizeof(uint16_t):
+ if (is_signed)
+ value_sp->GetScalar() = (int16_t)(raw_value & UINT16_MAX);
+ else
+ value_sp->GetScalar() = (uint16_t)(raw_value & UINT16_MAX);
+ break;
+
+ case sizeof(uint8_t):
+ if (is_signed)
+ value_sp->GetScalar() = (int8_t)(raw_value & UINT8_MAX);
+ else
+ value_sp->GetScalar() = (uint8_t)(raw_value & UINT8_MAX);
+ break;
+
+ default:
+ llvm_unreachable("Invalid integer size");
+ }
+
+ return value_sp;
+ }
+
+ // get a floating point value on the specified register
+ ValueSP GetFloatValue(CompilerType &type, uint32_t reg_index) {
+ uint64_t raw_data;
+ auto reg = GetFPR(reg_index);
+ if (!reg.GetRawData(raw_data))
+ return {};
+
+ // build value from data
+ ValueSP value_sp(NewScalarValue(type));
+
+ DataExtractor de(&raw_data, sizeof(raw_data), m_byte_order, m_addr_size);
+
+ offset_t offset = 0;
+ llvm::Optional<uint64_t> byte_size = type.GetByteSize(nullptr);
+ if (!byte_size)
+ return {};
+ switch (*byte_size) {
+ case sizeof(float):
+ value_sp->GetScalar() = (float)de.GetDouble(&offset);
+ break;
+
+ case sizeof(double):
+ value_sp->GetScalar() = de.GetDouble(&offset);
+ break;
+
+ default:
+ llvm_unreachable("Invalid floating point size");
+ }
+
+ return value_sp;
+ }
+
+ // get pointer value from register
+ ValueSP GetPointerValue(uint32_t reg_index) {
+ uint64_t raw_data;
+ auto reg = GetGPR(reg_index);
+ if (!reg.GetRawData(raw_data))
+ return ValueSP();
+
+ // build value from raw data
+ ValueSP value_sp(NewScalarValue(m_type));
+ value_sp->GetScalar() = raw_data;
+ return value_sp;
+ }
+
+ // build the ValueObject from our data buffer
+ ValueObjectSP BuildValueObject() {
+ DataExtractor de(DataBufferSP(m_data_up.release()), m_byte_order,
+ m_addr_size);
+ return ValueObjectConstResult::Create(&m_thread, m_type, ConstString(""),
+ de);
+ }
+
+ // get a vector return value
+ ValueObjectSP GetVectorValueObject() {
+ const uint32_t MAX_VRS = 2;
+
+ // get first V register used to return values
+ const RegisterInfo *vr[MAX_VRS];
+ vr[0] = m_reg_ctx->GetRegisterInfoByName("vr2");
+ if (!vr[0]) {
+ LLDB_LOG(m_log, LOG_PREFIX "Failed to get vr2 RegisterInfo");
+ return ValueObjectSP();
+ }
+
+ const uint32_t vr_size = vr[0]->byte_size;
+ size_t vrs = 1;
+ if (m_byte_size > 2 * vr_size) {
+ LLDB_LOG(
+ m_log, LOG_PREFIX
+ "Returning vectors that don't fit in 2 VR regs is not supported");
+ return ValueObjectSP();
+ }
+
+ // load vr3, if needed
+ if (m_byte_size > vr_size) {
+ vrs++;
+ vr[1] = m_reg_ctx->GetRegisterInfoByName("vr3");
+ if (!vr[1]) {
+ LLDB_LOG(m_log, LOG_PREFIX "Failed to get vr3 RegisterInfo");
+ return ValueObjectSP();
+ }
+ }
+
+ // Get the whole contents of vector registers and let the logic here
+ // arrange the data properly.
+
+ RegisterValue vr_val[MAX_VRS];
+ Status error;
+ std::unique_ptr<DataBufferHeap> vr_data(
+ new DataBufferHeap(vrs * vr_size, 0));
+
+ for (uint32_t i = 0; i < vrs; i++) {
+ if (!m_reg_ctx->ReadRegister(vr[i], vr_val[i])) {
+ LLDB_LOG(m_log, LOG_PREFIX "Failed to read vector register contents");
+ return ValueObjectSP();
+ }
+ if (!vr_val[i].GetAsMemoryData(vr[i], vr_data->GetBytes() + i * vr_size,
+ vr_size, m_byte_order, error)) {
+ LLDB_LOG(m_log, LOG_PREFIX "Failed to extract vector register bytes");
+ return ValueObjectSP();
+ }
+ }
+
+ // The compiler generated code seems to always put the vector elements at
+ // the end of the vector register, in case they don't occupy all of it.
+ // This offset variable handles this.
+ uint32_t offs = 0;
+ if (m_byte_size < vr_size)
+ offs = vr_size - m_byte_size;
+
+ // copy extracted data to our buffer
+ memcpy(m_data_up->GetBytes(), vr_data->GetBytes() + offs, m_byte_size);
+ return BuildValueObject();
+ }
+
+ // get a struct return value
+ ValueObjectSP GetStructValueObject() {
+ // case 1: get from stack
+ if (m_byte_size > 2 * sizeof(uint64_t)) {
+ uint64_t addr;
+ auto reg = GetGPR(0);
+ if (!reg.GetRawData(addr))
+ return {};
+
+ Status error;
+ size_t rc = m_process_sp->ReadMemory(addr, m_data_up->GetBytes(),
+ m_byte_size, error);
+ if (rc != m_byte_size) {
+ LLDB_LOG(m_log, LOG_PREFIX "Failed to read memory pointed by r3");
+ return ValueObjectSP();
+ }
+ return BuildValueObject();
+ }
+
+ // get number of children
+ const bool omit_empty_base_classes = true;
+ uint32_t n = m_type.GetNumChildren(omit_empty_base_classes, nullptr);
+ if (!n) {
+ LLDB_LOG(m_log, LOG_PREFIX "No children found in struct");
+ return {};
+ }
+
+ // case 2: homogeneous double or float aggregate
+ CompilerType elem_type;
+ if (m_type.IsHomogeneousAggregate(&elem_type)) {
+ uint32_t type_flags = elem_type.GetTypeInfo();
+ llvm::Optional<uint64_t> elem_size = elem_type.GetByteSize(nullptr);
+ if (!elem_size)
+ return {};
+ if (type_flags & eTypeIsComplex || !(type_flags & eTypeIsFloat)) {
+ LLDB_LOG(m_log,
+ LOG_PREFIX "Unexpected type found in homogeneous aggregate");
+ return {};
+ }
+
+ for (uint32_t i = 0; i < n; i++) {
+ ValueSP val_sp = GetFloatValue(elem_type, i);
+ if (!val_sp)
+ return {};
+
+ // copy to buffer
+ Status error;
+ size_t rc = val_sp->GetScalar().GetAsMemoryData(
+ m_data_up->GetBytes() + m_dst_offs, *elem_size, m_byte_order,
+ error);
+ if (rc != *elem_size) {
+ LLDB_LOG(m_log, LOG_PREFIX "Failed to get float data");
+ return {};
+ }
+ m_dst_offs += *elem_size;
+ }
+ return BuildValueObject();
+ }
+
+ // case 3: get from GPRs
+
+ // first, check if this is a packed struct or not
+ TypeSystemClang *ast =
+ llvm::dyn_cast<TypeSystemClang>(m_type.GetTypeSystem());
+ if (ast) {
+ clang::RecordDecl *record_decl = TypeSystemClang::GetAsRecordDecl(m_type);
+
+ if (record_decl) {
+ auto attrs = record_decl->attrs();
+ for (const auto &attr : attrs) {
+ if (attr->getKind() == clang::attr::Packed) {
+ m_packed = true;
+ break;
+ }
+ }
+ }
+ }
+
+ LLDB_LOG(m_log, LOG_PREFIX "{0} struct",
+ m_packed ? "packed" : "not packed");
+
+ for (uint32_t i = 0; i < n; i++) {
+ std::string name;
+ uint32_t size;
+ GetChildType(i, name, size);
+ // NOTE: the offset returned by GetChildCompilerTypeAtIndex()
+ // can't be used because it never considers alignment bytes
+ // between struct fields.
+ LLDB_LOG(m_log, LOG_PREFIX "field={0}, size={1}", name, size);
+ if (!ExtractField(size))
+ return ValueObjectSP();
+ }
+
+ return BuildValueObject();
+ }
+
+ // extract 'size' bytes at 'offs' from GPRs
+ bool ExtractFromRegs(int32_t offs, uint32_t size, void *buf) {
+ while (size) {
+ auto reg = GetGPRByOffs(offs);
+ if (!reg.IsValid())
+ return false;
+
+ uint32_t n = std::min(reg.Avail(), size);
+ uint64_t raw_data;
+
+ if (!reg.GetRawData(raw_data))
+ return false;
+
+ memcpy(buf, (char *)&raw_data + reg.Offs(), n);
+ offs += n;
+ size -= n;
+ buf = (char *)buf + n;
+ }
+ return true;
+ }
+
+ // extract one field from GPRs and put it in our buffer
+ bool ExtractField(uint32_t size) {
+ auto reg = GetGPRByOffs(m_src_offs);
+ if (!reg.IsValid())
+ return false;
+
+ // handle padding
+ if (!m_packed) {
+ uint32_t n = m_src_offs % size;
+
+ // not 'size' bytes aligned
+ if (n) {
+ LLDB_LOG(m_log,
+ LOG_PREFIX "Extracting {0} alignment bytes at offset {1}", n,
+ m_src_offs);
+ // get alignment bytes
+ if (!ExtractFromRegs(m_src_offs, n, m_data_up->GetBytes() + m_dst_offs))
+ return false;
+ m_src_offs += n;
+ m_dst_offs += n;
+ }
+ }
+
+ // get field
+ LLDB_LOG(m_log, LOG_PREFIX "Extracting {0} field bytes at offset {1}", size,
+ m_src_offs);
+ if (!ExtractFromRegs(m_src_offs, size, m_data_up->GetBytes() + m_dst_offs))
+ return false;
+ m_src_offs += size;
+ m_dst_offs += size;
+ return true;
+ }
+
+ // get child
+ CompilerType GetChildType(uint32_t i, std::string &name, uint32_t &size) {
+ // GetChild constant inputs
+ const bool transparent_pointers = false;
+ const bool omit_empty_base_classes = true;
+ const bool ignore_array_bounds = false;
+ // GetChild output params
+ int32_t child_offs;
+ uint32_t child_bitfield_bit_size;
+ uint32_t child_bitfield_bit_offset;
+ bool child_is_base_class;
+ bool child_is_deref_of_parent;
+ ValueObject *valobj = nullptr;
+ uint64_t language_flags;
+ ExecutionContext exe_ctx;
+ m_thread.CalculateExecutionContext(exe_ctx);
+
+ return m_type.GetChildCompilerTypeAtIndex(
+ &exe_ctx, i, transparent_pointers, omit_empty_base_classes,
+ ignore_array_bounds, name, size, child_offs, child_bitfield_bit_size,
+ child_bitfield_bit_offset, child_is_base_class,
+ child_is_deref_of_parent, valobj, language_flags);
+ }
+};
+
+#undef LOG_PREFIX
+
+} // anonymous namespace
+
+ValueObjectSP
+ABISysV_ppc64::GetReturnValueObjectSimple(Thread &thread,
+ CompilerType &type) const {
+ if (!type)
+ return ValueObjectSP();
+
+ auto exp_extractor = ReturnValueExtractor::Create(thread, type);
+ if (!exp_extractor) {
+ Log *log = lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS);
+ LLDB_LOG_ERROR(log, exp_extractor.takeError(),
+ "Extracting return value failed: {0}");
+ return ValueObjectSP();
+ }
+
+ return exp_extractor.get().GetValue();
+}
+
+ValueObjectSP ABISysV_ppc64::GetReturnValueObjectImpl(
+ Thread &thread, CompilerType &return_compiler_type) const {
+ return GetReturnValueObjectSimple(thread, return_compiler_type);
+}
+
+bool ABISysV_ppc64::CreateFunctionEntryUnwindPlan(UnwindPlan &unwind_plan) {
+ unwind_plan.Clear();
+ unwind_plan.SetRegisterKind(eRegisterKindDWARF);
+
+ uint32_t lr_reg_num;
+ uint32_t sp_reg_num;
+ uint32_t pc_reg_num;
+
+ if (GetByteOrder() == lldb::eByteOrderLittle) {
+ lr_reg_num = ppc64le_dwarf::dwarf_lr_ppc64le;
+ sp_reg_num = ppc64le_dwarf::dwarf_r1_ppc64le;
+ pc_reg_num = ppc64le_dwarf::dwarf_pc_ppc64le;
+ } else {
+ lr_reg_num = ppc64_dwarf::dwarf_lr_ppc64;
+ sp_reg_num = ppc64_dwarf::dwarf_r1_ppc64;
+ pc_reg_num = ppc64_dwarf::dwarf_pc_ppc64;
+ }
+
+ UnwindPlan::RowSP row(new UnwindPlan::Row);
+
+ // Our Call Frame Address is the stack pointer value
+ row->GetCFAValue().SetIsRegisterPlusOffset(sp_reg_num, 0);
+
+ // The previous PC is in the LR
+ row->SetRegisterLocationToRegister(pc_reg_num, lr_reg_num, true);
+ unwind_plan.AppendRow(row);
+
+ // All other registers are the same.
+
+ unwind_plan.SetSourceName("ppc64 at-func-entry default");
+ unwind_plan.SetSourcedFromCompiler(eLazyBoolNo);
+
+ return true;
+}
+
+bool ABISysV_ppc64::CreateDefaultUnwindPlan(UnwindPlan &unwind_plan) {
+ unwind_plan.Clear();
+ unwind_plan.SetRegisterKind(eRegisterKindDWARF);
+
+ uint32_t sp_reg_num;
+ uint32_t pc_reg_num;
+ uint32_t cr_reg_num;
+
+ if (GetByteOrder() == lldb::eByteOrderLittle) {
+ sp_reg_num = ppc64le_dwarf::dwarf_r1_ppc64le;
+ pc_reg_num = ppc64le_dwarf::dwarf_lr_ppc64le;
+ cr_reg_num = ppc64le_dwarf::dwarf_cr_ppc64le;
+ } else {
+ sp_reg_num = ppc64_dwarf::dwarf_r1_ppc64;
+ pc_reg_num = ppc64_dwarf::dwarf_lr_ppc64;
+ cr_reg_num = ppc64_dwarf::dwarf_cr_ppc64;
+ }
+
+ UnwindPlan::RowSP row(new UnwindPlan::Row);
+ const int32_t ptr_size = 8;
+ row->GetCFAValue().SetIsRegisterDereferenced(sp_reg_num);
+
+ row->SetRegisterLocationToAtCFAPlusOffset(pc_reg_num, ptr_size * 2, true);
+ row->SetRegisterLocationToIsCFAPlusOffset(sp_reg_num, 0, true);
+ row->SetRegisterLocationToAtCFAPlusOffset(cr_reg_num, ptr_size, true);
+
+ unwind_plan.AppendRow(row);
+ unwind_plan.SetSourceName("ppc64 default unwind plan");
+ unwind_plan.SetSourcedFromCompiler(eLazyBoolNo);
+ unwind_plan.SetUnwindPlanValidAtAllInstructions(eLazyBoolNo);
+ unwind_plan.SetUnwindPlanForSignalTrap(eLazyBoolNo);
+ unwind_plan.SetReturnAddressRegister(pc_reg_num);
+ return true;
+}
+
+bool ABISysV_ppc64::RegisterIsVolatile(const RegisterInfo *reg_info) {
+ return !RegisterIsCalleeSaved(reg_info);
+}
+
+// See "Register Usage" in the
+// "System V Application Binary Interface"
+// "64-bit PowerPC ELF Application Binary Interface Supplement" current version
+// is 2 released 2015 at
+// https://members.openpowerfoundation.org/document/dl/576
+bool ABISysV_ppc64::RegisterIsCalleeSaved(const RegisterInfo *reg_info) {
+ if (reg_info) {
+ // Preserved registers are :
+ // r1,r2,r13-r31
+ // cr2-cr4 (partially preserved)
+ // f14-f31 (not yet)
+ // v20-v31 (not yet)
+ // vrsave (not yet)
+
+ const char *name = reg_info->name;
+ if (name[0] == 'r') {
+ if ((name[1] == '1' || name[1] == '2') && name[2] == '\0')
+ return true;
+ if (name[1] == '1' && name[2] > '2')
+ return true;
+ if ((name[1] == '2' || name[1] == '3') && name[2] != '\0')
+ return true;
+ }
+
+ if (name[0] == 'f' && name[1] >= '0' && name[2] <= '9') {
+ if (name[2] == '\0')
+ return false;
+ if (name[1] == '1' && name[2] >= '4')
+ return true;
+ if ((name[1] == '2' || name[1] == '3') && name[2] != '\0')
+ return true;
+ }
+
+ if (name[0] == 's' && name[1] == 'p' && name[2] == '\0') // sp
+ return true;
+ if (name[0] == 'f' && name[1] == 'p' && name[2] == '\0') // fp
+ return false;
+ if (name[0] == 'p' && name[1] == 'c' && name[2] == '\0') // pc
+ return true;
+ }
+ return false;
+}
+
+void ABISysV_ppc64::Initialize() {
+ PluginManager::RegisterPlugin(
+ GetPluginNameStatic(), "System V ABI for ppc64 targets", CreateInstance);
+}
+
+void ABISysV_ppc64::Terminate() {
+ PluginManager::UnregisterPlugin(CreateInstance);
+}
+
+lldb_private::ConstString ABISysV_ppc64::GetPluginNameStatic() {
+ static ConstString g_name("sysv-ppc64");
+ return g_name;
+}
+
+// PluginInterface protocol
+
+lldb_private::ConstString ABISysV_ppc64::GetPluginName() {
+ return GetPluginNameStatic();
+}
+
+uint32_t ABISysV_ppc64::GetPluginVersion() { return 1; }
diff --git a/lldb/source/Plugins/ABI/PowerPC/ABISysV_ppc64.h b/lldb/source/Plugins/ABI/PowerPC/ABISysV_ppc64.h
new file mode 100644
index 0000000000000..8dcf3ca48b56c
--- /dev/null
+++ b/lldb/source/Plugins/ABI/PowerPC/ABISysV_ppc64.h
@@ -0,0 +1,104 @@
+//===-- ABISysV_ppc64.h ----------------------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLDB_SOURCE_PLUGINS_ABI_POWERPC_ABISYSV_PPC64_H
+#define LLDB_SOURCE_PLUGINS_ABI_POWERPC_ABISYSV_PPC64_H
+
+#include "lldb/Target/ABI.h"
+#include "lldb/lldb-private.h"
+
+class ABISysV_ppc64 : public lldb_private::RegInfoBasedABI {
+public:
+ ~ABISysV_ppc64() override = default;
+
+ size_t GetRedZoneSize() const override;
+
+ bool PrepareTrivialCall(lldb_private::Thread &thread, lldb::addr_t sp,
+ lldb::addr_t functionAddress,
+ lldb::addr_t returnAddress,
+ llvm::ArrayRef<lldb::addr_t> args) const override;
+
+ bool GetArgumentValues(lldb_private::Thread &thread,
+ lldb_private::ValueList &values) const override;
+
+ lldb_private::Status
+ SetReturnValueObject(lldb::StackFrameSP &frame_sp,
+ lldb::ValueObjectSP &new_value) override;
+
+ lldb::ValueObjectSP
+ GetReturnValueObjectImpl(lldb_private::Thread &thread,
+ lldb_private::CompilerType &type) const override;
+
+ bool
+ CreateFunctionEntryUnwindPlan(lldb_private::UnwindPlan &unwind_plan) override;
+
+ bool CreateDefaultUnwindPlan(lldb_private::UnwindPlan &unwind_plan) override;
+
+ bool RegisterIsVolatile(const lldb_private::RegisterInfo *reg_info) override;
+
+ // The SysV ppc64 ABI requires that stack frames be 16 byte aligned.
+ // When there is a trap handler on the stack, e.g. _sigtramp in userland
+ // code, we've seen that the stack pointer is often not aligned properly
+ // before the handler is invoked. This means that lldb will stop the unwind
+ // early -- before the function which caused the trap.
+ //
+ // To work around this, we relax that alignment to be just word-size
+ // (8-bytes).
+ // Allowing the trap handlers for user space would be easy (_sigtramp) but
+ // in other environments there can be a large number of different functions
+ // involved in async traps.
+ bool CallFrameAddressIsValid(lldb::addr_t cfa) override {
+ // Make sure the stack call frame addresses are 8 byte aligned
+ if (cfa & (8ull - 1ull))
+ return false; // Not 8 byte aligned
+ if (cfa == 0)
+ return false; // Zero is not a valid stack address
+ return true;
+ }
+
+ bool CodeAddressIsValid(lldb::addr_t pc) override {
+ // We have a 64 bit address space, so anything is valid as opcodes
+ // aren't fixed width...
+ return true;
+ }
+
+ const lldb_private::RegisterInfo *
+ GetRegisterInfoArray(uint32_t &count) override;
+
+ // Static Functions
+
+ static void Initialize();
+
+ static void Terminate();
+
+ static lldb::ABISP CreateInstance(lldb::ProcessSP process_sp, const lldb_private::ArchSpec &arch);
+
+ static lldb_private::ConstString GetPluginNameStatic();
+
+ // PluginInterface protocol
+
+ lldb_private::ConstString GetPluginName() override;
+
+ uint32_t GetPluginVersion() override;
+
+protected:
+ void CreateRegisterMapIfNeeded();
+
+ lldb::ValueObjectSP
+ GetReturnValueObjectSimple(lldb_private::Thread &thread,
+ lldb_private::CompilerType &ast_type) const;
+
+ bool RegisterIsCalleeSaved(const lldb_private::RegisterInfo *reg_info);
+
+private:
+ using lldb_private::RegInfoBasedABI::RegInfoBasedABI; // Call CreateInstance instead.
+
+ lldb::ByteOrder GetByteOrder() const;
+};
+
+#endif // LLDB_SOURCE_PLUGINS_ABI_POWERPC_ABISYSV_PPC64_H
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-30 02:20:00 +0000