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authorEd Maste <emaste@FreeBSD.org>2015-02-06 21:38:51 +0000
committerEd Maste <emaste@FreeBSD.org>2015-02-06 21:38:51 +0000
commit205afe679855a4ce8149cdaa94d3f0868ce796dc (patch)
tree09bc83f73246ee3c7a779605cd0122093d2a8a19 /source/Plugins/ABI/SysV-ppc64/ABISysV_ppc64.cpp
parent0cac4ca3916ac24ab6139d03cbfd18db9e715bfe (diff)
downloadsrc-205afe679855a4ce8149cdaa94d3f0868ce796dc.tar.gz
src-205afe679855a4ce8149cdaa94d3f0868ce796dc.zip
Import LLDB as of upstream SVN r225923 (git 2b588ecd)vendor/lldb/lldb-r225923
This corresponds with the branchpoint for the 3.6 release. A number of files not required for the FreeBSD build have been removed. Sponsored by: DARPA, AFRL
Notes
Notes: svn path=/vendor/lldb/dist/; revision=278332 svn path=/vendor/lldb/lldb-r225923/; revision=278333; tag=vendor/lldb/lldb-r225923
Diffstat (limited to 'source/Plugins/ABI/SysV-ppc64/ABISysV_ppc64.cpp')
-rw-r--r--source/Plugins/ABI/SysV-ppc64/ABISysV_ppc64.cpp1124
1 files changed, 1124 insertions, 0 deletions
diff --git a/source/Plugins/ABI/SysV-ppc64/ABISysV_ppc64.cpp b/source/Plugins/ABI/SysV-ppc64/ABISysV_ppc64.cpp
new file mode 100644
index 000000000000..46f1e1023f0a
--- /dev/null
+++ b/source/Plugins/ABI/SysV-ppc64/ABISysV_ppc64.cpp
@@ -0,0 +1,1124 @@
+//===-- ABISysV_ppc64.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_ppc64.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/ClangASTContext.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 gcc_dwarf_regnums
+{
+ gcc_dwarf_r0 = 0,
+ gcc_dwarf_r1,
+ gcc_dwarf_r2,
+ gcc_dwarf_r3,
+ gcc_dwarf_r4,
+ gcc_dwarf_r5,
+ gcc_dwarf_r6,
+ gcc_dwarf_r7,
+ gcc_dwarf_r8,
+ gcc_dwarf_r9,
+ gcc_dwarf_r10,
+ gcc_dwarf_r11,
+ gcc_dwarf_r12,
+ gcc_dwarf_r13,
+ gcc_dwarf_r14,
+ gcc_dwarf_r15,
+ gcc_dwarf_r16,
+ gcc_dwarf_r17,
+ gcc_dwarf_r18,
+ gcc_dwarf_r19,
+ gcc_dwarf_r20,
+ gcc_dwarf_r21,
+ gcc_dwarf_r22,
+ gcc_dwarf_r23,
+ gcc_dwarf_r24,
+ gcc_dwarf_r25,
+ gcc_dwarf_r26,
+ gcc_dwarf_r27,
+ gcc_dwarf_r28,
+ gcc_dwarf_r29,
+ gcc_dwarf_r30,
+ gcc_dwarf_r31,
+ gcc_dwarf_f0,
+ gcc_dwarf_f1,
+ gcc_dwarf_f2,
+ gcc_dwarf_f3,
+ gcc_dwarf_f4,
+ gcc_dwarf_f5,
+ gcc_dwarf_f6,
+ gcc_dwarf_f7,
+ gcc_dwarf_f8,
+ gcc_dwarf_f9,
+ gcc_dwarf_f10,
+ gcc_dwarf_f11,
+ gcc_dwarf_f12,
+ gcc_dwarf_f13,
+ gcc_dwarf_f14,
+ gcc_dwarf_f15,
+ gcc_dwarf_f16,
+ gcc_dwarf_f17,
+ gcc_dwarf_f18,
+ gcc_dwarf_f19,
+ gcc_dwarf_f20,
+ gcc_dwarf_f21,
+ gcc_dwarf_f22,
+ gcc_dwarf_f23,
+ gcc_dwarf_f24,
+ gcc_dwarf_f25,
+ gcc_dwarf_f26,
+ gcc_dwarf_f27,
+ gcc_dwarf_f28,
+ gcc_dwarf_f29,
+ gcc_dwarf_f30,
+ gcc_dwarf_f31,
+ gcc_dwarf_cr,
+ gcc_dwarf_fpscr,
+ gcc_dwarf_xer = 101,
+ gcc_dwarf_lr = 108,
+ gcc_dwarf_ctr,
+ gcc_dwarf_pc,
+ gcc_dwarf_cfa,
+};
+
+enum gdb_regnums
+{
+ gdb_r0 = 0,
+ gdb_r1,
+ gdb_r2,
+ gdb_r3,
+ gdb_r4,
+ gdb_r5,
+ gdb_r6,
+ gdb_r7,
+ gdb_r8,
+ gdb_r9,
+ gdb_r10,
+ gdb_r11,
+ gdb_r12,
+ gdb_r13,
+ gdb_r14,
+ gdb_r15,
+ gdb_r16,
+ gdb_r17,
+ gdb_r18,
+ gdb_r19,
+ gdb_r20,
+ gdb_r21,
+ gdb_r22,
+ gdb_r23,
+ gdb_r24,
+ gdb_r25,
+ gdb_r26,
+ gdb_r27,
+ gdb_r28,
+ gdb_r29,
+ gdb_r30,
+ gdb_r31,
+ gdb_lr,
+ gdb_cr,
+ gdb_xer,
+ gdb_ctr,
+ gdb_pc,
+};
+
+
+// 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}, NULL, NULL }
+static const RegisterInfo
+g_register_infos[] =
+{
+ // General purpose registers. GCC, DWARF, Generic, GDB
+ DEFINE_GPR(r0, NULL, gcc_dwarf_r0, gcc_dwarf_r0, LLDB_INVALID_REGNUM, gdb_r0),
+ DEFINE_GPR(r1, "sp", gcc_dwarf_r1, gcc_dwarf_r1, LLDB_REGNUM_GENERIC_SP, gdb_r1),
+ DEFINE_GPR(r2, NULL, gcc_dwarf_r2, gcc_dwarf_r2, LLDB_INVALID_REGNUM, gdb_r2),
+ DEFINE_GPR(r3, "arg1",gcc_dwarf_r3, gcc_dwarf_r3, LLDB_REGNUM_GENERIC_ARG1, gdb_r3),
+ DEFINE_GPR(r4, "arg2",gcc_dwarf_r4, gcc_dwarf_r4, LLDB_REGNUM_GENERIC_ARG2 ,gdb_r4),
+ DEFINE_GPR(r5, "arg3",gcc_dwarf_r5, gcc_dwarf_r5, LLDB_REGNUM_GENERIC_ARG3, gdb_r5),
+ DEFINE_GPR(r6, "arg4",gcc_dwarf_r6, gcc_dwarf_r6, LLDB_REGNUM_GENERIC_ARG4, gdb_r6),
+ DEFINE_GPR(r7, "arg5",gcc_dwarf_r7, gcc_dwarf_r7, LLDB_REGNUM_GENERIC_ARG5, gdb_r7),
+ DEFINE_GPR(r8, "arg6",gcc_dwarf_r8, gcc_dwarf_r8, LLDB_REGNUM_GENERIC_ARG6, gdb_r8),
+ DEFINE_GPR(r9, "arg7",gcc_dwarf_r9, gcc_dwarf_r9, LLDB_REGNUM_GENERIC_ARG7, gdb_r9),
+ DEFINE_GPR(r10, "arg8",gcc_dwarf_r10, gcc_dwarf_r10, LLDB_REGNUM_GENERIC_ARG8, gdb_r10),
+ DEFINE_GPR(r11, NULL, gcc_dwarf_r11, gcc_dwarf_r11, LLDB_INVALID_REGNUM, gdb_r11),
+ DEFINE_GPR(r12, NULL, gcc_dwarf_r12, gcc_dwarf_r12, LLDB_INVALID_REGNUM, gdb_r12),
+ DEFINE_GPR(r13, NULL, gcc_dwarf_r13, gcc_dwarf_r13, LLDB_INVALID_REGNUM, gdb_r13),
+ DEFINE_GPR(r14, NULL, gcc_dwarf_r14, gcc_dwarf_r14, LLDB_INVALID_REGNUM, gdb_r14),
+ DEFINE_GPR(r15, NULL, gcc_dwarf_r15, gcc_dwarf_r15, LLDB_INVALID_REGNUM, gdb_r15),
+ DEFINE_GPR(r16, NULL, gcc_dwarf_r16, gcc_dwarf_r16, LLDB_INVALID_REGNUM, gdb_r16),
+ DEFINE_GPR(r17, NULL, gcc_dwarf_r17, gcc_dwarf_r17, LLDB_INVALID_REGNUM, gdb_r17),
+ DEFINE_GPR(r18, NULL, gcc_dwarf_r18, gcc_dwarf_r18, LLDB_INVALID_REGNUM, gdb_r18),
+ DEFINE_GPR(r19, NULL, gcc_dwarf_r19, gcc_dwarf_r19, LLDB_INVALID_REGNUM, gdb_r19),
+ DEFINE_GPR(r20, NULL, gcc_dwarf_r20, gcc_dwarf_r20, LLDB_INVALID_REGNUM, gdb_r20),
+ DEFINE_GPR(r21, NULL, gcc_dwarf_r21, gcc_dwarf_r21, LLDB_INVALID_REGNUM, gdb_r21),
+ DEFINE_GPR(r22, NULL, gcc_dwarf_r22, gcc_dwarf_r22, LLDB_INVALID_REGNUM, gdb_r22),
+ DEFINE_GPR(r23, NULL, gcc_dwarf_r23, gcc_dwarf_r23, LLDB_INVALID_REGNUM, gdb_r23),
+ DEFINE_GPR(r24, NULL, gcc_dwarf_r24, gcc_dwarf_r24, LLDB_INVALID_REGNUM, gdb_r24),
+ DEFINE_GPR(r25, NULL, gcc_dwarf_r25, gcc_dwarf_r25, LLDB_INVALID_REGNUM, gdb_r25),
+ DEFINE_GPR(r26, NULL, gcc_dwarf_r26, gcc_dwarf_r26, LLDB_INVALID_REGNUM, gdb_r26),
+ DEFINE_GPR(r27, NULL, gcc_dwarf_r27, gcc_dwarf_r27, LLDB_INVALID_REGNUM, gdb_r27),
+ DEFINE_GPR(r28, NULL, gcc_dwarf_r28, gcc_dwarf_r28, LLDB_INVALID_REGNUM, gdb_r28),
+ DEFINE_GPR(r29, NULL, gcc_dwarf_r29, gcc_dwarf_r29, LLDB_INVALID_REGNUM, gdb_r29),
+ DEFINE_GPR(r30, NULL, gcc_dwarf_r30, gcc_dwarf_r30, LLDB_INVALID_REGNUM, gdb_r30),
+ DEFINE_GPR(r31, NULL, gcc_dwarf_r31, gcc_dwarf_r31, LLDB_INVALID_REGNUM, gdb_r31),
+ DEFINE_GPR(lr, "lr", gcc_dwarf_lr, gcc_dwarf_lr, LLDB_REGNUM_GENERIC_RA, gdb_lr),
+ DEFINE_GPR(cr, "cr", gcc_dwarf_cr, gcc_dwarf_cr, LLDB_REGNUM_GENERIC_FLAGS, LLDB_INVALID_REGNUM),
+ DEFINE_GPR(xer, "xer", gcc_dwarf_xer, gcc_dwarf_xer, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM),
+ DEFINE_GPR(ctr, "ctr", gcc_dwarf_ctr, gcc_dwarf_ctr, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM),
+ DEFINE_GPR(pc, "pc", gcc_dwarf_pc, gcc_dwarf_pc, LLDB_REGNUM_GENERIC_PC, LLDB_INVALID_REGNUM),
+ { NULL, NULL, 8, 0, eEncodingUint, eFormatHex, { gcc_dwarf_cfa, gcc_dwarf_cfa, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, NULL, NULL},
+};
+
+static const uint32_t k_num_register_infos = llvm::array_lengthof(g_register_infos);
+
+const lldb_private::RegisterInfo *
+ABISysV_ppc64::GetRegisterInfoArray (uint32_t &count)
+{
+ count = k_num_register_infos;
+ return g_register_infos;
+}
+
+
+size_t
+ABISysV_ppc64::GetRedZoneSize () const
+{
+ return 224;
+}
+
+//------------------------------------------------------------------
+// Static Functions
+//------------------------------------------------------------------
+ABISP
+ABISysV_ppc64::CreateInstance (const ArchSpec &arch)
+{
+ static ABISP g_abi_sp;
+ if (arch.GetTriple().getArch() == llvm::Triple::ppc64)
+ {
+ if (!g_abi_sp)
+ g_abi_sp.reset (new ABISysV_ppc64);
+ return g_abi_sp;
+ }
+ 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%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
+
+ sp -= 8;
+
+ 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);
+ ProcessSP process_sp (thread.GetProcess());
+
+ RegisterValue reg_value;
+
+#if 0
+ // This code adds an extra frame so that we don't lose the function that we came from
+ // by pushing the PC and the FP and then writing the current FP to point to the FP value
+ // we just pushed. It is disabled for now until the stack backtracing code can be debugged.
+
+ // Save current PC
+ const RegisterInfo *fp_reg_info = reg_ctx->GetRegisterInfo (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_FP);
+ if (reg_ctx->ReadRegister(pc_reg_info, reg_value))
+ {
+ if (log)
+ log->Printf("Pushing the current PC onto the stack: 0x%" PRIx64 ": 0x%" PRIx64, (uint64_t)sp, reg_value.GetAsUInt64());
+
+ if (!process_sp->WritePointerToMemory(sp, reg_value.GetAsUInt64(), error))
+ return false;
+
+ sp -= 8;
+
+ // Save current FP
+ if (reg_ctx->ReadRegister(fp_reg_info, reg_value))
+ {
+ if (log)
+ log->Printf("Pushing the current FP onto the stack: 0x%" PRIx64 ": 0x%" PRIx64, (uint64_t)sp, reg_value.GetAsUInt64());
+
+ if (!process_sp->WritePointerToMemory(sp, reg_value.GetAsUInt64(), error))
+ return false;
+ }
+ // Setup FP backchain
+ reg_value.SetUInt64 (sp);
+
+ if (log)
+ log->Printf("Writing FP: 0x%" PRIx64 " (for FP backchain)", reg_value.GetAsUInt64());
+
+ if (!reg_ctx->WriteRegister(fp_reg_info, reg_value))
+ {
+ return false;
+ }
+
+ sp -= 8;
+ }
+#endif
+
+ if (log)
+ log->Printf("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.
+
+ if (log)
+ log->Printf("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.
+
+ if (log)
+ log->Printf("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;
+ Error 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;
+
+ 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?
+ ClangASTType clang_type = value->GetClangType();
+ if (!clang_type)
+ return false;
+ bool is_signed;
+
+ if (clang_type.IsIntegerType (is_signed))
+ {
+ ReadIntegerArgument(value->GetScalar(),
+ clang_type.GetBitSize(),
+ is_signed,
+ thread,
+ argument_register_ids,
+ current_argument_register,
+ current_stack_argument);
+ }
+ else if (clang_type.IsPointerType ())
+ {
+ ReadIntegerArgument(value->GetScalar(),
+ clang_type.GetBitSize(),
+ false,
+ thread,
+ argument_register_ids,
+ current_argument_register,
+ current_stack_argument);
+ }
+ }
+
+ return true;
+}
+
+Error
+ABISysV_ppc64::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;
+ }
+
+ ClangASTType clang_type = new_value_sp->GetClangType();
+ if (!clang_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 (clang_type.IsIntegerType (is_signed) || clang_type.IsPointerType())
+ {
+ const RegisterInfo *reg_info = reg_ctx->GetRegisterInfoByName("r3", 0);
+
+ 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;
+ }
+ 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 (clang_type.IsFloatingPointType (count, is_complex))
+ {
+ if (is_complex)
+ error.SetErrorString ("We don't support returning complex values at present");
+ else
+ {
+ size_t bit_width = clang_type.GetBitSize();
+ if (bit_width <= 64)
+ {
+ 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;
+ }
+
+ 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_ppc64::GetReturnValueObjectSimple (Thread &thread,
+ ClangASTType &return_clang_type) const
+{
+ ValueObjectSP return_valobj_sp;
+ Value value;
+
+ if (!return_clang_type)
+ return return_valobj_sp;
+
+ //value.SetContext (Value::eContextTypeClangType, return_value_type);
+ value.SetClangType (return_clang_type);
+
+ RegisterContext *reg_ctx = thread.GetRegisterContext().get();
+ if (!reg_ctx)
+ return return_valobj_sp;
+
+ const uint32_t type_flags = return_clang_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
+
+ const size_t byte_size = return_clang_type.GetByteSize();
+ 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
+ {
+ const size_t byte_size = return_clang_type.GetByteSize();
+ if (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)
+ {
+ const size_t byte_size = return_clang_type.GetByteSize();
+ if (byte_size > 0)
+ {
+
+ const RegisterInfo *altivec_reg = reg_ctx->GetRegisterInfoByName("v0", 0);
+ if (altivec_reg == NULL)
+ altivec_reg = reg_ctx->GetRegisterInfoByName("mm0", 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_ap (new DataBufferHeap(byte_size, 0));
+ const ByteOrder byte_order = process_sp->GetByteOrder();
+ RegisterValue reg_value;
+ if (reg_ctx->ReadRegister(altivec_reg, reg_value))
+ {
+ Error error;
+ if (reg_value.GetAsMemoryData (altivec_reg,
+ heap_data_ap->GetBytes(),
+ heap_data_ap->GetByteSize(),
+ byte_order,
+ error))
+ {
+ DataExtractor data (DataBufferSP (heap_data_ap.release()),
+ byte_order,
+ process_sp->GetTarget().GetArchitecture().GetAddressByteSize());
+ return_valobj_sp = ValueObjectConstResult::Create (&thread,
+ return_clang_type,
+ ConstString(""),
+ data);
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+
+ return return_valobj_sp;
+}
+
+ValueObjectSP
+ABISysV_ppc64::GetReturnValueObjectImpl (Thread &thread, ClangASTType &return_clang_type) const
+{
+ ValueObjectSP return_valobj_sp;
+
+ if (!return_clang_type)
+ return return_valobj_sp;
+
+ ExecutionContext exe_ctx (thread.shared_from_this());
+ return_valobj_sp = GetReturnValueObjectSimple(thread, return_clang_type);
+ if (return_valobj_sp)
+ return return_valobj_sp;
+
+ RegisterContextSP reg_ctx_sp = thread.GetRegisterContext();
+ if (!reg_ctx_sp)
+ return return_valobj_sp;
+
+ const size_t bit_width = return_clang_type.GetBitSize();
+ if (return_clang_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_clang_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;
+
+ ClangASTType field_clang_type = return_clang_type.GetFieldAtIndex (idx, name, &field_bit_offset, NULL, NULL);
+ const size_t field_bit_width = field_clang_type.GetBitSize();
+
+ // 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 = NULL;
+ uint32_t copy_from_offset = 0;
+
+ if (field_clang_type.IsIntegerType (is_signed) || field_clang_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 NULL return value object.
+ return return_valobj_sp;
+ }
+ }
+ else if (field_clang_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;
+ ClangASTType next_field_clang_type = return_clang_type.GetFieldAtIndex (idx + 1,
+ name,
+ &next_field_bit_offset,
+ NULL,
+ NULL);
+ if (next_field_clang_type.IsIntegerType (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;
+ ClangASTType prev_field_clang_type = return_clang_type.GetFieldAtIndex (idx - 1,
+ name,
+ &prev_field_bit_offset,
+ NULL,
+ NULL);
+ if (prev_field_clang_type.IsIntegerType (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_clang_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, NULL),
+ return_clang_type);
+ }
+ }
+
+ return return_valobj_sp;
+}
+
+bool
+ABISysV_ppc64::CreateFunctionEntryUnwindPlan (UnwindPlan &unwind_plan)
+{
+ unwind_plan.Clear();
+ unwind_plan.SetRegisterKind (eRegisterKindDWARF);
+
+ uint32_t lr_reg_num = gcc_dwarf_lr;
+ uint32_t sp_reg_num = gcc_dwarf_r1;
+ uint32_t pc_reg_num = gcc_dwarf_pc;
+
+ UnwindPlan::RowSP row(new UnwindPlan::Row);
+
+ // Our Call Frame Address is the stack pointer value
+ row->SetCFARegister (sp_reg_num);
+
+ // 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 = gcc_dwarf_r1;
+ uint32_t pc_reg_num = gcc_dwarf_lr;
+
+ UnwindPlan::RowSP row(new UnwindPlan::Row);
+
+ const int32_t ptr_size = 8;
+ row->SetCFARegister (sp_reg_num);
+ row->SetCFAType(lldb_private::UnwindPlan::Row::CFAIsRegisterDereferenced);
+
+ row->SetRegisterLocationToAtCFAPlusOffset(pc_reg_num, ptr_size * 2, true);
+ row->SetRegisterLocationToIsCFAPlusOffset(sp_reg_num, 0, true);
+ row->SetRegisterLocationToAtCFAPlusOffset(gcc_dwarf_cr, ptr_size, true);
+
+ unwind_plan.AppendRow (row);
+ unwind_plan.SetSourceName ("ppc64 default unwind plan");
+ unwind_plan.SetSourcedFromCompiler (eLazyBoolNo);
+ unwind_plan.SetUnwindPlanValidAtAllInstructions (eLazyBoolNo);
+ unwind_plan.SetReturnAddressRegister(gcc_dwarf_lr);
+ 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 1.9 released 2004 at http://refspecs.linuxfoundation.org/ELF/ppc64/PPC-elf64abi-1.9.pdf
+
+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 true;
+ 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;
+}
+