First cut of PowerPC(64) support in LLDB.

[jhibbits]

Summary

This adds preliminary support for PowerPC/PowerPC64, for FreeBSD. There are
some issues still:

• Breakpoints don't work well on powerpc64.
• Shared libraries don't yet get loaded for a 32-bit process on powerpc64 host.
• Backtraces don't work. This is due to PowerPC ABI using a backchain pointer in memory, instead of a dedicated frame pointer register for the backchain.
• Breakpoints on functions without debug info may not work correctly for 32-bit powerpc.

[zturner]

I don't think I'm the right person to review this change, but I've added Greg Clayton and Jim Ingham. If nothing else, they can help you find a better reviewer.

[clayborg]

Everything looks good except there is no need to add "eCore_ppc_powerpc" as we already have "eCore_ppc_generic", and no need to add "eCore_ppc64_powerpc64" as we already have "eCore_ppc64_generic". Feel free to keep the new "powerpc" and "powerpc64" string entries in the ArchSpec table, but I still use the eCore_ppc_generic and eCore_ppc64_generic core definitions.

[jhibbits]

In D5988#9, @clayborg wrote:

Everything looks good except there is no need to add "eCore_ppc_powerpc" as we already have "eCore_ppc_generic", and no need to add "eCore_ppc64_powerpc64" as we already have "eCore_ppc64_generic". Feel free to keep the new "powerpc" and "powerpc64" string entries in the ArchSpec table, but I still use the eCore_ppc_generic and eCore_ppc64_generic core definitions.

Thanks, Greg. I was also hesitant about the ArchSpec table, because of this duplication. The only reason I added these was to appease the static_assert that follows the table. Adding two new entries required adding two new enum items as well. If changing the assert to '>=' from '==' is sufficient, I'll go ahead with that and remove the new definitions. Otherwise, do you have any suggestion on how best to handle this?

[clayborg]

Ah, I see what you mean about the static assert. In that case can you just use the "ppc" and "ppc64" entries? Or rename them to be "powerpc" and "powerpc64"? We want our triples to match what llvm uses for PowerPC so if llvm doesn't use "ppc" or "ppc64", just rename the entries in the "g_core_definitions" table, otherwise, use the "ppc" and "ppc64" entries.

[jhibbits]

Remove the ArchSpec changes, and use 'powerpc*' instead of both 'ppc' and 'powerpc'.

Also handle an API change.

[clayborg]

Looks good.

[jhibbits]

Closed by commit rL220944 (authored by @jhibbits).

[emaste]

source/Core/ArchSpec.cpp

22

Leftover from earlier debugging?

source/Host/freebsd/Host.cpp

304

Do we have a source for the magic constant?

312

can we just return buf_sp here instead?

source/Plugins/ABI/CMakeLists.txt

2–3

ppc should sort before ppc64

source/Plugins/ABI/SysV-ppc/ABISysV_ppc.cpp

264

Should we have a log for this?

634

Debug log or error return for these cases?

1032

you should be able to use a register ID in kinds here rather than comparing strings, I'd think

source/Plugins/Platform/FreeBSD/PlatformFreeBSD.cpp

331

Maybe a phabricator issue, but whitespace seems off here - tabs vs. spaces?

source/Plugins/Process/elf-core/RegisterContextPOSIXCore_powerpc.cpp

51

llvm_unreachable("powerpc::WriteFPR unimplemented"); perhaps?

source/Target/Thread.cpp

2284–2285

ppc should sort first

source/lldb.cpp

232

ppc and ppc64 ::Initialize but only pp64 ::Terminate

[jhibbits]

There's still lots of work left to do on this, which I'll work on for future patches. I'll fix the immediate problems, though, in a patch I'll submit tonight or tomorrow.

source/Core/ArchSpec.cpp

22

Yup. Thought I had removed all the debug stuff. Guess I missed some

source/Host/freebsd/Host.cpp

304

This constant is probably only good for powerpc. It's derived from SHARED_PAGE - sizeof(struct freebsd32_ps_strings). It's probably better to add a sysctl to the kernel to get the information of any given process. What do you think?

312

This is a direct copy of GetAuxData() below. So they can both be updated the same. I'm not sure the rationale of GetAuxData() doing it, so figured the best solution for now is to just copy it.

source/Plugins/ABI/CMakeLists.txt

2–3

Oops. Fixing in a new patch, with the others.

source/Plugins/ABI/SysV-ppc/ABISysV_ppc.cpp

264

Log or TODO/FIXME, yes. I'll add something.

634

Shamelessly copied from SysV-x86_64. The else{} block should be logged, though. Will add that.

1032

That's a better way, yes. I did it this way because ABISysV-x86_64 does this. I'll fix it in a future patch. Still lots of work left before this is really complete.

source/Plugins/Platform/FreeBSD/PlatformFreeBSD.cpp

331

Yup, this was one of the first changes I had made, and used tabs. Fixed in next patch.

source/Plugins/Process/elf-core/RegisterContextPOSIXCore_powerpc.cpp

51

Good idea. I'll include it in a future patch, for both GPR and FPR.

source/Target/Thread.cpp

2284–2285

Oops, next patch.

source/lldb.cpp

232

Fixing in a new patch.

[loladiro]

lldb/trunk/source/Plugins/Makefile

16 ↗

(On Diff #15601)

Missing ABI/SysV-ppc

[jhibbits]

lldb/trunk/source/Plugins/Makefile

16 ↗

(On Diff #15601)

Yeah, I noticed this, too. It's been fixed in a newer revision, along with other bugs.

lib/Makefile

USEDLIBS = lldbAPI.a \
   lldbDataFormatters.a \
   lldbExpression.a \
   lldbHostCommon.a \
   lldbInitAndLog.a \
   lldbInterpreter.a \
   lldbPluginABIMacOSX_arm.a \
   lldbPluginABIMacOSX_arm64.a \
   lldbPluginABIMacOSX_i386.a \
+  lldbPluginABISysV_ppc64.a \
   lldbPluginABISysV_x86_64.a \
   lldbPluginABISysV_hexagon.a \
   lldbPluginDisassemblerLLVM.a \
   lldbPluginDynamicLoaderStatic.a \
   lldbPluginDynamicLoaderPOSIX.a \
   lldbPluginDynamicLoaderHexagon.a \
   lldbPluginEmulateInstructionARM.a \
   lldbPluginEmulateInstructionARM64.a \

source/CMakeLists.txt

set( LLDB_USED_LIBS
   lldbPluginUnwindAssemblyX86
   lldbPluginAppleObjCRuntime
   lldbPluginCXXItaniumABI
   lldbPluginABIMacOSX_arm
   lldbPluginABIMacOSX_arm64
   lldbPluginABIMacOSX_i386
   lldbPluginABISysV_x86_64
   lldbPluginABISysV_hexagon
+  lldbPluginABISysV_ppc
+  lldbPluginABISysV_ppc64
   lldbPluginInstructionARM
   lldbPluginInstructionARM64
   lldbPluginObjectFilePECOFF
   lldbPluginOSPython
   lldbPluginMemoryHistoryASan
   lldbPluginInstrumentationRuntimeAddressSanitizer
   )
 

source/Core/ArchSpec.cpp

 
 #include <string>
 
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/Support/COFF.h"
 #include "llvm/Support/ELF.h"
 #include "llvm/Support/Host.h"
 #include "lldb/Utility/SafeMachO.h"
+#include "lldb/Core/Log.h"
 #include "lldb/Core/RegularExpression.h"
 #include "lldb/Core/StringList.h"
 #include "lldb/Host/Endian.h"
 #include "lldb/Host/HostInfo.h"
 #include "lldb/Target/Platform.h"
 
 using namespace lldb;
 using namespace lldb_private;
static const CoreDefinition g_core_definitions[] =
     { eByteOrderLittle, 4, 2, 4, llvm::Triple::thumb  , ArchSpec::eCore_thumbv7m        , "thumbv7m"  },
     { eByteOrderLittle, 4, 2, 4, llvm::Triple::thumb  , ArchSpec::eCore_thumbv7em       , "thumbv7em" },
     { eByteOrderLittle, 8, 4, 4, llvm::Triple::aarch64, ArchSpec::eCore_arm_arm64       , "arm64"     },
     { eByteOrderLittle, 8, 4, 4, llvm::Triple::aarch64, ArchSpec::eCore_arm_armv8       , "armv8"     },
     { eByteOrderLittle, 8, 4, 4, llvm::Triple::aarch64, ArchSpec::eCore_arm_aarch64     , "aarch64"   },
 
     { eByteOrderBig   , 8, 4, 4, llvm::Triple::mips64 , ArchSpec::eCore_mips64          , "mips64"    },
     
-    { eByteOrderBig   , 4, 4, 4, llvm::Triple::ppc    , ArchSpec::eCore_ppc_generic     , "ppc"       },
+    { eByteOrderBig   , 4, 4, 4, llvm::Triple::ppc    , ArchSpec::eCore_ppc_generic     , "powerpc"   },
     { eByteOrderBig   , 4, 4, 4, llvm::Triple::ppc    , ArchSpec::eCore_ppc_ppc601      , "ppc601"    },
     { eByteOrderBig   , 4, 4, 4, llvm::Triple::ppc    , ArchSpec::eCore_ppc_ppc602      , "ppc602"    },
     { eByteOrderBig   , 4, 4, 4, llvm::Triple::ppc    , ArchSpec::eCore_ppc_ppc603      , "ppc603"    },
     { eByteOrderBig   , 4, 4, 4, llvm::Triple::ppc    , ArchSpec::eCore_ppc_ppc603e     , "ppc603e"   },
     { eByteOrderBig   , 4, 4, 4, llvm::Triple::ppc    , ArchSpec::eCore_ppc_ppc603ev    , "ppc603ev"  },
     { eByteOrderBig   , 4, 4, 4, llvm::Triple::ppc    , ArchSpec::eCore_ppc_ppc604      , "ppc604"    },
     { eByteOrderBig   , 4, 4, 4, llvm::Triple::ppc    , ArchSpec::eCore_ppc_ppc604e     , "ppc604e"   },
     { eByteOrderBig   , 4, 4, 4, llvm::Triple::ppc    , ArchSpec::eCore_ppc_ppc620      , "ppc620"    },
     { eByteOrderBig   , 4, 4, 4, llvm::Triple::ppc    , ArchSpec::eCore_ppc_ppc750      , "ppc750"    },
     { eByteOrderBig   , 4, 4, 4, llvm::Triple::ppc    , ArchSpec::eCore_ppc_ppc7400     , "ppc7400"   },
     { eByteOrderBig   , 4, 4, 4, llvm::Triple::ppc    , ArchSpec::eCore_ppc_ppc7450     , "ppc7450"   },
     { eByteOrderBig   , 4, 4, 4, llvm::Triple::ppc    , ArchSpec::eCore_ppc_ppc970      , "ppc970"    },
     
-    { eByteOrderBig   , 8, 4, 4, llvm::Triple::ppc64  , ArchSpec::eCore_ppc64_generic   , "ppc64"     },
+    { eByteOrderBig   , 8, 4, 4, llvm::Triple::ppc64  , ArchSpec::eCore_ppc64_generic   , "powerpc64" },
     { eByteOrderBig   , 8, 4, 4, llvm::Triple::ppc64  , ArchSpec::eCore_ppc64_ppc970_64 , "ppc970-64" },
     
     { eByteOrderLittle, 4, 4, 4, llvm::Triple::sparc  , ArchSpec::eCore_sparc_generic   , "sparc"     },
     { eByteOrderLittle, 8, 4, 4, llvm::Triple::sparcv9, ArchSpec::eCore_sparc9_generic  , "sparcv9"   },
 
     { eByteOrderLittle, 4, 1, 15, llvm::Triple::x86    , ArchSpec::eCore_x86_32_i386    , "i386"      },
     { eByteOrderLittle, 4, 1, 15, llvm::Triple::x86    , ArchSpec::eCore_x86_32_i486    , "i486"      },
     { eByteOrderLittle, 4, 1, 15, llvm::Triple::x86    , ArchSpec::eCore_x86_32_i486sx  , "i486sx"    },

source/Host/freebsd/Host.cpp

if (GetFreeBSDProcessArgs(NULL, process_info))
         GetFreeBSDProcessUserAndGroup(process_info);
         return true;
     }
 
     process_info.Clear();
     return false;
 }
 
+static lldb::DataBufferSP
+GetAuxvData32(lldb_private::Process *process)
+{
+    struct {
+        uint32_t ps_argvstr;
+        int ps_nargvstr;
+        uint32_t ps_envstr;
+        int ps_nenvstr;
+    } ps_strings;
+    void *ps_strings_addr, *auxv_addr;
+    struct privElf32_Auxinfo { int a_type; unsigned int a_val; } aux_info32[AT_COUNT];
+    struct ptrace_io_desc pid;
+    DataBufferSP buf_sp;
+    std::unique_ptr<DataBufferHeap> buf_ap(new DataBufferHeap(1024, 0));
+
+    ps_strings_addr = (void *)0xffffdff0;
+    pid.piod_op = PIOD_READ_D;
+    pid.piod_addr = &ps_strings;
+    pid.piod_offs = ps_strings_addr;
+    pid.piod_len = sizeof(ps_strings);
+    if (::ptrace(PT_IO, process->GetID(), (caddr_t)&pid, 0)) {
+        perror("failed to fetch ps_strings");
+        buf_ap.release();
+        goto done;
+    }
+
+    auxv_addr = (void *)(ps_strings.ps_envstr + sizeof(uint32_t) * (ps_strings.ps_nenvstr + 1));
+
+    pid.piod_addr = aux_info32;
+    pid.piod_offs = auxv_addr;
+    pid.piod_len = sizeof(aux_info32);
+    if (::ptrace(PT_IO, process->GetID(), (caddr_t)&pid, 0)) {
+        perror("failed to fetch aux_info");
+        buf_ap.release();
+        goto done;
+    }
+    memcpy(buf_ap->GetBytes(), aux_info32, pid.piod_len);
+    buf_sp.reset(buf_ap.release());
+
+    done:
+    return buf_sp;
+}
+
 lldb::DataBufferSP
 Host::GetAuxvData(lldb_private::Process *process)
 {
    int mib[2] = { CTL_KERN, KERN_PS_STRINGS };
    void *ps_strings_addr, *auxv_addr;
    size_t ps_strings_size = sizeof(void *);
    Elf_Auxinfo aux_info[AT_COUNT];
    struct ps_strings ps_strings;
    struct ptrace_io_desc pid;
    DataBufferSP buf_sp;
+
+   if (process->GetAddressByteSize() < HostInfo::GetArchitecture().GetAddressByteSize())
+           return GetAuxvData32(process);
+
    std::unique_ptr<DataBufferHeap> buf_ap(new DataBufferHeap(1024, 0));
 
    if (::sysctl(mib, 2, &ps_strings_addr, &ps_strings_size, NULL, 0) == 0) {
            pid.piod_op = PIOD_READ_D;
            pid.piod_addr = &ps_strings;
            pid.piod_offs = ps_strings_addr;
            pid.piod_len = sizeof(ps_strings);
            if (::ptrace(PT_IO, process->GetID(), (caddr_t)&pid, 0)) {

source/Plugins/ABI/CMakeLists.txt

 add_subdirectory(SysV-hexagon)
+add_subdirectory(SysV-ppc64)
+add_subdirectory(SysV-ppc)
 add_subdirectory(SysV-x86_64)
 add_subdirectory(MacOSX-i386)
 add_subdirectory(MacOSX-arm)
 add_subdirectory(MacOSX-arm64)

source/Plugins/ABI/SysV-ppc/ABISysV_ppc.h

+//===-- ABISysV_ppc.h ----------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef liblldb_ABISysV_ppc_h_
+#define liblldb_ABISysV_ppc_h_
+
+// C Includes
+// C++ Includes
+// Other libraries and framework includes
+// Project includes
+#include "lldb/lldb-private.h"
+#include "lldb/Target/ABI.h"
+
+class ABISysV_ppc :
+    public lldb_private::ABI
+{
+public:
+
+    ~ABISysV_ppc()
+    {
+    }
+
+    virtual size_t
+    GetRedZoneSize () const;
+
+    virtual 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;
+    
+    virtual bool
+    GetArgumentValues (lldb_private::Thread &thread,
+                       lldb_private::ValueList &values) const;
+    
+    virtual lldb_private::Error
+    SetReturnValueObject(lldb::StackFrameSP &frame_sp, lldb::ValueObjectSP &new_value);
+
+protected:
+    lldb::ValueObjectSP
+    GetReturnValueObjectSimple (lldb_private::Thread &thread,
+                                lldb_private::ClangASTType &ast_type) const;
+    
+public:    
+    virtual lldb::ValueObjectSP
+    GetReturnValueObjectImpl (lldb_private::Thread &thread,
+                          lldb_private::ClangASTType &type) const;
+
+    virtual bool
+    CreateFunctionEntryUnwindPlan (lldb_private::UnwindPlan &unwind_plan);
+    
+    virtual bool
+    CreateDefaultUnwindPlan (lldb_private::UnwindPlan &unwind_plan);
+        
+    virtual bool
+    RegisterIsVolatile (const lldb_private::RegisterInfo *reg_info);
+    
+    virtual bool
+    StackUsesFrames ()
+    {
+        return true;
+    }
+    
+    // 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).
+    // Whitelisting 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.
+    virtual bool
+    CallFrameAddressIsValid (lldb::addr_t cfa)
+    {
+        // 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;
+    }
+    
+    virtual bool
+    CodeAddressIsValid (lldb::addr_t pc)
+    {
+        // We have a 64 bit address space, so anything is valid as opcodes
+        // aren't fixed width...
+        return true;
+    }
+
+    virtual bool
+    FunctionCallsChangeCFA ()
+    {
+        return true;
+    }
+
+    virtual const lldb_private::RegisterInfo *
+    GetRegisterInfoArray (uint32_t &count);
+    //------------------------------------------------------------------
+    // Static Functions
+    //------------------------------------------------------------------
+    static void
+    Initialize();
+
+    static void
+    Terminate();
+
+    static lldb::ABISP
+    CreateInstance (const lldb_private::ArchSpec &arch);
+
+    static lldb_private::ConstString
+    GetPluginNameStatic();
+    
+    //------------------------------------------------------------------
+    // PluginInterface protocol
+    //------------------------------------------------------------------
+    virtual lldb_private::ConstString
+    GetPluginName();
+
+    virtual uint32_t
+    GetPluginVersion();
+
+protected:
+    void
+    CreateRegisterMapIfNeeded ();
+
+    bool
+    RegisterIsCalleeSaved (const lldb_private::RegisterInfo *reg_info);
+
+private:
+    ABISysV_ppc() : lldb_private::ABI() { } // Call CreateInstance instead.
+};
+
+#endif  // liblldb_ABI_h_

source/Plugins/ABI/SysV-ppc/ABISysV_ppc.cpp

+//===-- ABISysV_ppc.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_ppc.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_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 (const ArchSpec &arch)
+{
+    static ABISP g_abi_sp;
+    if (arch.GetTriple().getArch() == llvm::Triple::ppc)
+    {
+        if (!g_abi_sp)
+            g_abi_sp.reset (new ABISysV_ppc);
+        return g_abi_sp;
+    }
+    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%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_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?
+        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_ppc::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_ppc::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
+            {
+            }
+        }
+
+        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_ppc::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_ppc::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 ("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 = 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 (LLDB_REGNUM_GENERIC_SP);
+    row->SetCFAOffset (8);
+    row->SetOffset (0);
+
+    row->SetRegisterLocationToAtCFAPlusOffset(pc_reg_num, ptr_size * -1, true);
+    row->SetRegisterLocationToAtCFAPlusOffset(sp_reg_num, ptr_size * -2, true);
+
+    unwind_plan.AppendRow (row);
+    unwind_plan.SetSourceName ("ppc default unwind plan");
+    unwind_plan.SetSourcedFromCompiler (eLazyBoolNo);
+    unwind_plan.SetUnwindPlanValidAtAllInstructions (eLazyBoolNo);
+    unwind_plan.SetReturnAddressRegister(gcc_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;
+}
+

source/Plugins/ABI/SysV-ppc/CMakeLists.txt

+set(LLVM_NO_RTTI 1)
+
+add_lldb_library(lldbPluginABISysV_ppc
+  ABISysV_ppc.cpp
+  )

source/Plugins/ABI/SysV-ppc/Makefile

+##===- source/Plugins/ABI/SysV-hexagon/Makefile -------------*- Makefile -*-===##
+# 
+#                     The LLVM Compiler Infrastructure
+#
+# This file is distributed under the University of Illinois Open Source
+# License. See LICENSE.TXT for details.
+# 
+##===----------------------------------------------------------------------===##
+
+LLDB_LEVEL := ../../../..
+LIBRARYNAME := lldbPluginABISysV_ppc
+BUILD_ARCHIVE = 1
+
+include $(LLDB_LEVEL)/Makefile

source/Plugins/ABI/SysV-ppc64/ABISysV_ppc64.h

+//===-- ABISysV_ppc64.h ----------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef liblldb_ABISysV_ppc64_h_
+#define liblldb_ABISysV_ppc64_h_
+
+// C Includes
+// C++ Includes
+// Other libraries and framework includes
+// Project includes
+#include "lldb/lldb-private.h"
+#include "lldb/Target/ABI.h"
+
+class ABISysV_ppc64 :
+    public lldb_private::ABI
+{
+public:
+
+    ~ABISysV_ppc64()
+    {
+    }
+
+    virtual size_t
+    GetRedZoneSize () const;
+
+    virtual 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;
+    
+    virtual bool
+    GetArgumentValues (lldb_private::Thread &thread,
+                       lldb_private::ValueList &values) const;
+    
+    virtual lldb_private::Error
+    SetReturnValueObject(lldb::StackFrameSP &frame_sp, lldb::ValueObjectSP &new_value);
+
+protected:
+    lldb::ValueObjectSP
+    GetReturnValueObjectSimple (lldb_private::Thread &thread,
+                                lldb_private::ClangASTType &ast_type) const;
+    
+public:    
+    virtual lldb::ValueObjectSP
+    GetReturnValueObjectImpl (lldb_private::Thread &thread,
+                          lldb_private::ClangASTType &type) const;
+
+    virtual bool
+    CreateFunctionEntryUnwindPlan (lldb_private::UnwindPlan &unwind_plan);
+    
+    virtual bool
+    CreateDefaultUnwindPlan (lldb_private::UnwindPlan &unwind_plan);
+        
+    virtual bool
+    RegisterIsVolatile (const lldb_private::RegisterInfo *reg_info);
+    
+    virtual bool
+    StackUsesFrames ()
+    {
+        return true;
+    }
+    
+    // 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).
+    // Whitelisting 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.
+    virtual bool
+    CallFrameAddressIsValid (lldb::addr_t cfa)
+    {
+        // 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;
+    }
+    
+    virtual bool
+    CodeAddressIsValid (lldb::addr_t pc)
+    {
+        // We have a 64 bit address space, so anything is valid as opcodes
+        // aren't fixed width...
+        return true;
+    }
+
+    virtual bool
+    FunctionCallsChangeCFA ()
+    {
+        return true;
+    }
+
+    virtual const lldb_private::RegisterInfo *
+    GetRegisterInfoArray (uint32_t &count);
+    //------------------------------------------------------------------
+    // Static Functions
+    //------------------------------------------------------------------
+    static void
+    Initialize();
+
+    static void
+    Terminate();
+
+    static lldb::ABISP
+    CreateInstance (const lldb_private::ArchSpec &arch);
+
+    static lldb_private::ConstString
+    GetPluginNameStatic();
+    
+    //------------------------------------------------------------------
+    // PluginInterface protocol
+    //------------------------------------------------------------------
+    virtual lldb_private::ConstString
+    GetPluginName();
+
+    virtual uint32_t
+    GetPluginVersion();
+
+protected:
+    void
+    CreateRegisterMapIfNeeded ();
+
+    bool
+    RegisterIsCalleeSaved (const lldb_private::RegisterInfo *reg_info);
+
+private:
+    ABISysV_ppc64() : lldb_private::ABI() { } // Call CreateInstance instead.
+};
+
+#endif  // liblldb_ABI_h_

source/Plugins/ABI/SysV-ppc64/ABISysV_ppc64.cpp

+//===-- 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
+            {
+            }
+        }
+
+        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 (LLDB_REGNUM_GENERIC_SP);
+    row->SetCFAOffset (48);
+    row->SetOffset (0);
+
+    row->SetRegisterLocationToAtCFAPlusOffset(pc_reg_num, ptr_size * -4, true);
+    row->SetRegisterLocationToAtCFAPlusOffset(sp_reg_num, ptr_size * -6, true);
+    row->SetRegisterLocationToAtCFAPlusOffset(gcc_dwarf_cr, ptr_size * -5, 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;
+}
+

source/Plugins/ABI/SysV-ppc64/CMakeLists.txt

+set(LLVM_NO_RTTI 1)
+
+add_lldb_library(lldbPluginABISysV_ppc64
+  ABISysV_ppc64.cpp
+  )

source/Plugins/ABI/SysV-ppc64/Makefile

+##===- source/Plugins/ABI/SysV-hexagon/Makefile -------------*- Makefile -*-===##
+# 
+#                     The LLVM Compiler Infrastructure
+#
+# This file is distributed under the University of Illinois Open Source
+# License. See LICENSE.TXT for details.
+# 
+##===----------------------------------------------------------------------===##
+
+LLDB_LEVEL := ../../../..
+LIBRARYNAME := lldbPluginABISysV_ppc64
+BUILD_ARCHIVE = 1
+
+include $(LLDB_LEVEL)/Makefile

source/Plugins/DynamicLoader/POSIX-DYLD/DynamicLoaderPOSIXDYLD.cpp

if (m_auxv.get() == NULL)
         return LLDB_INVALID_ADDRESS;
 
     AuxVector::iterator I = m_auxv->FindEntry(AuxVector::AT_ENTRY);
 
     if (I == m_auxv->end())
         return LLDB_INVALID_ADDRESS;
 
     m_entry_point = static_cast<addr_t>(I->value);
+
+    const ArchSpec &arch = m_process->GetTarget().GetArchitecture();
+
+    // On ppc64, the entry point is actually a descriptor.  Dereference it.
+    if (arch.GetMachine() == llvm::Triple::ppc64)
+        m_entry_point = ReadUnsignedIntWithSizeInBytes(m_entry_point, 8);
+
     return m_entry_point;
 }
 
 lldb::addr_t
 DynamicLoaderPOSIXDYLD::GetThreadLocalData (const lldb::ModuleSP module, const lldb::ThreadSP thread)
 {
     auto it = m_loaded_modules.find (module);
     if (it == m_loaded_modules.end())

source/Plugins/Makefile

 ##===- source/Plugins/Makefile -----------------------------*- Makefile -*-===##
 # 
 #                     The LLVM Compiler Infrastructure
 #
 # This file is distributed under the University of Illinois Open Source
 # License. See LICENSE.TXT for details.
 # 
 ##===----------------------------------------------------------------------===##
 
 LLDB_LEVEL := ../..
 
 include $(LLDB_LEVEL)/../../Makefile.config
 
 
 PARALLEL_DIRS := ABI/MacOSX-arm ABI/MacOSX-arm64 ABI/MacOSX-i386 ABI/SysV-x86_64 \
-  ABI/SysV-hexagon \
+  ABI/SysV-hexagon ABI/SysV-ppc64 \
   Disassembler/llvm \
   ObjectContainer/BSD-Archive ObjectFile/ELF ObjectFile/PECOFF \
   ObjectFile/JIT SymbolFile/DWARF SymbolFile/Symtab Process/Utility \
   DynamicLoader/Static Platform Process/gdb-remote \
   Instruction/ARM Instruction/ARM64 \
   UnwindAssembly/InstEmulation UnwindAssembly/x86 \
   LanguageRuntime/CPlusPlus/ItaniumABI \
   LanguageRuntime/ObjC/AppleObjCRuntime \

source/Plugins/ObjectFile/ELF/ELFHeader.cpp

 {
     unsigned slot = 0;
 
     switch (e_machine)
     {
     default:
         assert(false && "architecture not supported");
         break;
+    case EM_PPC:
+        slot = R_PPC_JMP_SLOT;
+        break;
+    case EM_PPC64:
+        slot = R_PPC64_JMP_SLOT;
+        break;
     case EM_386:
     case EM_486:
         slot = R_386_JUMP_SLOT;
         break;
     case EM_X86_64:
         slot = R_X86_64_JUMP_SLOT;
         break;
     case EM_ARM:

source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp

ObjectFileELF::ParseSymbols (Symtab *symtab,
     static ConstString ctors_section_name(".ctors");
     static ConstString dtors_section_name(".dtors");
 
     static ConstString data_section_name(".data");
     static ConstString rodata_section_name(".rodata");
     static ConstString rodata1_section_name(".rodata1");
     static ConstString data2_section_name(".data1");
     static ConstString bss_section_name(".bss");
+    static ConstString opd_section_name(".opd");    // For ppc64
 
     //StreamFile strm(stdout, false);
     unsigned i;
     for (i = 0; i < num_symbols; ++i)
     {
         if (symbol.Parse(symtab_data, &offset) == false)
             break;
         

source/Plugins/Platform/FreeBSD/PlatformFreeBSD.cpp

PlatformFreeBSD::GetSoftwareBreakpointTrapOpcode (Target &target, BreakpointSite *bp_site)
     case llvm::Triple::x86:
     case llvm::Triple::x86_64:
         {
             static const uint8_t g_i386_opcode[] = { 0xCC };
             trap_opcode = g_i386_opcode;
             trap_opcode_size = sizeof(g_i386_opcode);
         }
         break;
+  case llvm::Triple::ppc:
+  case llvm::Triple::ppc64:
+    {
+      static const uint8_t g_ppc_opcode[] = { 0x7f, 0xe0, 0x00, 0x08 };
+      trap_opcode = g_ppc_opcode;
+      trap_opcode_size = sizeof(g_ppc_opcode);
+    }
     }
 
     if (bp_site->SetTrapOpcode(trap_opcode, trap_opcode_size))
         return trap_opcode_size;
 
     return 0;
 }
 

source/Plugins/Process/FreeBSD/ProcessMonitor.cpp

#ifdef __amd64__
             struct reg *r = (struct reg *) addr;
 
             log->Printf("PT_GETREGS: ip=0x%lx", r->r_rip);
             log->Printf("PT_GETREGS: sp=0x%lx", r->r_rsp);
             log->Printf("PT_GETREGS: bp=0x%lx", r->r_rbp);
             log->Printf("PT_GETREGS: ax=0x%lx", r->r_rax);
         }
 #endif
+#ifndef __powerpc__
         if (req == PT_GETDBREGS || req == PT_SETDBREGS) {
             struct dbreg *r = (struct dbreg *) addr;
             char setget = (req == PT_GETDBREGS) ? 'G' : 'S';
 
             for (int i = 0; i <= 7; i++)
                 log->Printf("PT_%cETDBREGS: dr[%d]=0x%lx", setget, i, r->dr[i]);
         }
+#endif
     }
      
     return result;
 }
 
 // Wrapper for ptrace when logging is not required.
 // Sets errno to 0 prior to calling ptrace.
 extern long

source/Plugins/Process/POSIX/CMakeLists.txt

 set(LLVM_NO_RTTI 1)
 
 include_directories(.)
 include_directories(../Linux)
 include_directories(../Utility)
 
 add_lldb_library(lldbPluginProcessPOSIX
   POSIXStopInfo.cpp
   POSIXThread.cpp
   ProcessMessage.cpp
   ProcessPOSIX.cpp
   ProcessPOSIXLog.cpp
   RegisterContextPOSIXProcessMonitor_arm64.cpp
   RegisterContextPOSIXProcessMonitor_mips64.cpp
+  RegisterContextPOSIXProcessMonitor_powerpc.cpp
   RegisterContextPOSIXProcessMonitor_x86.cpp
   )

source/Plugins/Process/POSIX/POSIXThread.cpp

 #include "llvm/ADT/SmallString.h"
 #include "POSIXStopInfo.h"
 #include "POSIXThread.h"
 #include "ProcessPOSIX.h"
 #include "ProcessPOSIXLog.h"
 #include "Plugins/Process/Linux/ProcessMonitor.h"
 #include "RegisterContextPOSIXProcessMonitor_arm64.h"
 #include "RegisterContextPOSIXProcessMonitor_mips64.h"
+#include "RegisterContextPOSIXProcessMonitor_powerpc.h"
 #include "RegisterContextPOSIXProcessMonitor_x86.h"
 #include "Plugins/Process/Utility/RegisterContextLinux_arm64.h"
 #include "Plugins/Process/Utility/RegisterContextLinux_i386.h"
 #include "Plugins/Process/Utility/RegisterContextLinux_x86_64.h"
 #include "Plugins/Process/Utility/RegisterContextFreeBSD_i386.h"
 #include "Plugins/Process/Utility/RegisterContextFreeBSD_mips64.h"
+#include "Plugins/Process/Utility/RegisterContextFreeBSD_powerpc.h"
 #include "Plugins/Process/Utility/RegisterContextFreeBSD_x86_64.h"
 #include "Plugins/Process/Utility/UnwindLLDB.h"
 
 using namespace lldb;
 using namespace lldb_private;
 
 
 POSIXThread::POSIXThread(Process &process, lldb::tid_t tid)
if (!m_reg_context_sp)
         RegisterInfoInterface *reg_interface = NULL;
         const ArchSpec &target_arch = GetProcess()->GetTarget().GetArchitecture();
 
         switch (target_arch.GetTriple().getOS())
         {
             case llvm::Triple::FreeBSD:
                 switch (target_arch.GetMachine())
                 {
+                    case llvm::Triple::ppc:
+#ifndef __powerpc64__
+                        reg_interface = new RegisterContextFreeBSD_powerpc32(target_arch);
+                        break;
+#endif
+                    case llvm::Triple::ppc64:
+                        reg_interface = new RegisterContextFreeBSD_powerpc64(target_arch);
+                        break;
                     case llvm::Triple::mips64:
                         reg_interface = new RegisterContextFreeBSD_mips64(target_arch);
                         break;
                     case llvm::Triple::x86:
                         reg_interface = new RegisterContextFreeBSD_i386(target_arch);
                         break;
                     case llvm::Triple::x86_64:
                         reg_interface = new RegisterContextFreeBSD_x86_64(target_arch);
#endif
                 }
             case llvm::Triple::mips64:
                 {
                     RegisterContextPOSIXProcessMonitor_mips64 *reg_ctx = new RegisterContextPOSIXProcessMonitor_mips64(*this, 0, reg_interface);
                     m_posix_thread = reg_ctx;
                     m_reg_context_sp.reset(reg_ctx);
                     break;
                 }
+            case llvm::Triple::ppc:
+            case llvm::Triple::ppc64:
+                {
+                    RegisterContextPOSIXProcessMonitor_powerpc *reg_ctx = new RegisterContextPOSIXProcessMonitor_powerpc(*this, 0, reg_interface);
+                    m_posix_thread = reg_ctx;
+                    m_reg_context_sp.reset(reg_ctx);
+                    break;
+                }
             case llvm::Triple::x86:
             case llvm::Triple::x86_64:
                 {
                     RegisterContextPOSIXProcessMonitor_x86_64 *reg_ctx = new RegisterContextPOSIXProcessMonitor_x86_64(*this, 0, reg_interface);
                     m_posix_thread = reg_ctx;
                     m_reg_context_sp.reset(reg_ctx);
                     break;
                 }
POSIXThread::GetRegisterIndexFromOffset(unsigned offset)
     switch (arch.GetMachine())
     {
     default:
         llvm_unreachable("CPU type not supported!");
         break;
 
     case llvm::Triple::aarch64:
     case llvm::Triple::mips64:
+    case llvm::Triple::ppc:
+    case llvm::Triple::ppc64:
     case llvm::Triple::x86:
     case llvm::Triple::x86_64:
         {
             POSIXBreakpointProtocol* reg_ctx = GetPOSIXBreakpointProtocol();
             reg = reg_ctx->GetRegisterIndexFromOffset(offset);
         }
         break;
     }
POSIXThread::GetRegisterName(unsigned reg)
     switch (arch.GetMachine())
     {
     default:
         assert(false && "CPU type not supported!");
         break;
 
     case llvm::Triple::aarch64:
     case llvm::Triple::mips64:
+    case llvm::Triple::ppc:
+    case llvm::Triple::ppc64:
     case llvm::Triple::x86:
     case llvm::Triple::x86_64:
         name = GetRegisterContext()->GetRegisterName(reg);
         break;
     }
     return name;
 }
 
 const char *
 POSIXThread::GetRegisterNameFromOffset(unsigned offset)
 {
     return GetRegisterName(GetRegisterIndexFromOffset(offset));
 }
 

source/Plugins/Process/POSIX/RegisterContextPOSIXProcessMonitor_powerpc.h

+//===-- RegisterContextPOSIXProcessMonitor_powerpc.h -------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef liblldb_RegisterContextPOSIXProcessMonitor_powerpc_H_
+#define liblldb_RegisterContextPOSIXProcessMonitor_powerpc_H_
+
+#include "Plugins/Process/Utility/RegisterContextPOSIX_powerpc.h"
+
+class RegisterContextPOSIXProcessMonitor_powerpc:
+    public RegisterContextPOSIX_powerpc,
+    public POSIXBreakpointProtocol
+{
+public:
+    RegisterContextPOSIXProcessMonitor_powerpc(lldb_private::Thread &thread,
+                                              uint32_t concrete_frame_idx,
+                                              lldb_private::RegisterInfoInterface *register_info);
+
+protected:
+    bool
+    ReadGPR();
+
+    bool
+    ReadFPR();
+
+    bool
+    WriteGPR();
+
+    bool
+    WriteFPR();
+
+    // lldb_private::RegisterContext
+    bool
+    ReadRegister(const unsigned reg, lldb_private::RegisterValue &value);
+
+    bool
+    WriteRegister(const unsigned reg, const lldb_private::RegisterValue &value);
+
+    bool
+    ReadRegister(const lldb_private::RegisterInfo *reg_info, lldb_private::RegisterValue &value);
+
+    bool
+    WriteRegister(const lldb_private::RegisterInfo *reg_info, const lldb_private::RegisterValue &value);
+
+    bool
+    ReadAllRegisterValues(lldb::DataBufferSP &data_sp);
+
+    bool
+    WriteAllRegisterValues(const lldb::DataBufferSP &data_sp);
+
+    uint32_t
+    SetHardwareWatchpoint(lldb::addr_t addr, size_t size, bool read, bool write);
+
+    bool
+    ClearHardwareWatchpoint(uint32_t hw_index);
+
+    bool
+    HardwareSingleStep(bool enable);
+
+    // POSIXBreakpointProtocol
+    bool
+    UpdateAfterBreakpoint();
+
+    unsigned
+    GetRegisterIndexFromOffset(unsigned offset);
+
+    bool
+    IsWatchpointHit(uint32_t hw_index);
+
+    bool
+    ClearWatchpointHits();
+
+    lldb::addr_t
+    GetWatchpointAddress(uint32_t hw_index);
+
+    bool
+    IsWatchpointVacant(uint32_t hw_index);
+
+    bool
+    SetHardwareWatchpointWithIndex(lldb::addr_t addr, size_t size, bool read, bool write, uint32_t hw_index);
+
+    uint32_t
+    NumSupportedHardwareWatchpoints();
+
+private:
+    ProcessMonitor &
+    GetMonitor();
+};
+
+#endif

source/Plugins/Process/POSIX/RegisterContextPOSIXProcessMonitor_powerpc.cpp

+//===-- RegisterContextPOSIXProcessMonitor_powerpc.h ------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===---------------------------------------------------------------------===//
+
+#include "lldb/Target/Thread.h"
+#include "lldb/Core/RegisterValue.h"
+
+#include "RegisterContextPOSIX_powerpc.h"
+#include "ProcessPOSIX.h"
+#include "RegisterContextPOSIXProcessMonitor_powerpc.h"
+#include "ProcessMonitor.h"
+
+using namespace lldb_private;
+using namespace lldb;
+
+#define REG_CONTEXT_SIZE (GetGPRSize())
+
+RegisterContextPOSIXProcessMonitor_powerpc::RegisterContextPOSIXProcessMonitor_powerpc(Thread &thread,
+                                                                                     uint32_t concrete_frame_idx,
+                                                                                     lldb_private::RegisterInfoInterface *register_info)
+    : RegisterContextPOSIX_powerpc(thread, concrete_frame_idx, register_info)
+{
+}
+
+ProcessMonitor &
+RegisterContextPOSIXProcessMonitor_powerpc::GetMonitor()
+{
+    ProcessSP base = CalculateProcess();
+    ProcessPOSIX *process = static_cast<ProcessPOSIX*>(base.get());
+    return process->GetMonitor();
+}
+
+bool
+RegisterContextPOSIXProcessMonitor_powerpc::ReadGPR()
+{
+     ProcessMonitor &monitor = GetMonitor();
+     return monitor.ReadGPR(m_thread.GetID(), &m_gpr_powerpc, GetGPRSize());
+}
+
+bool
+RegisterContextPOSIXProcessMonitor_powerpc::ReadFPR()
+{
+    // XXX not yet implemented
+    return false;
+}
+
+bool
+RegisterContextPOSIXProcessMonitor_powerpc::WriteGPR()
+{
+    ProcessMonitor &monitor = GetMonitor();
+    return monitor.WriteGPR(m_thread.GetID(), &m_gpr_powerpc, GetGPRSize());
+}
+
+bool
+RegisterContextPOSIXProcessMonitor_powerpc::WriteFPR()
+{
+    // XXX not yet implemented
+    return false;
+}
+
+bool
+RegisterContextPOSIXProcessMonitor_powerpc::ReadRegister(const unsigned reg,
+                                                        RegisterValue &value)
+{
+    ProcessMonitor &monitor = GetMonitor();
+    return monitor.ReadRegisterValue(m_thread.GetID(),
+                                     GetRegisterOffset(reg),
+                                     GetRegisterName(reg),
+                                     GetRegisterSize(reg),
+                                     value);
+}
+
+bool
+RegisterContextPOSIXProcessMonitor_powerpc::WriteRegister(const unsigned reg,
+                                                         const RegisterValue &value)
+{
+    unsigned reg_to_write = reg;
+    RegisterValue value_to_write = value;
+
+    // Check if this is a subregister of a full register.
+    const RegisterInfo *reg_info = GetRegisterInfoAtIndex(reg);
+    if (reg_info->invalidate_regs && (reg_info->invalidate_regs[0] != LLDB_INVALID_REGNUM))
+    {
+        RegisterValue full_value;
+        uint32_t full_reg = reg_info->invalidate_regs[0];
+        const RegisterInfo *full_reg_info = GetRegisterInfoAtIndex(full_reg);
+
+        // Read the full register.
+        if (ReadRegister(full_reg_info, full_value))
+        {
+            Error error;
+            ByteOrder byte_order = GetByteOrder();
+            uint8_t dst[RegisterValue::kMaxRegisterByteSize];
+
+            // Get the bytes for the full register.
+            const uint32_t dest_size = full_value.GetAsMemoryData (full_reg_info,
+                                                                   dst,
+                                                                   sizeof(dst),
+                                                                   byte_order,
+                                                                   error);
+            if (error.Success() && dest_size)
+            {
+                uint8_t src[RegisterValue::kMaxRegisterByteSize];
+
+                // Get the bytes for the source data.
+                const uint32_t src_size = value.GetAsMemoryData (reg_info, src, sizeof(src), byte_order, error);
+                if (error.Success() && src_size && (src_size < dest_size))
+                {
+                    // Copy the src bytes to the destination.
+                    memcpy (dst + (reg_info->byte_offset & 0x1), src, src_size);
+                    // Set this full register as the value to write.
+                    value_to_write.SetBytes(dst, full_value.GetByteSize(), byte_order);
+                    value_to_write.SetType(full_reg_info);
+                    reg_to_write = full_reg;
+                }
+            }
+        }
+    }
+
+    ProcessMonitor &monitor = GetMonitor();
+    return monitor.WriteRegisterValue(m_thread.GetID(),
+                                      GetRegisterOffset(reg_to_write),
+                                      GetRegisterName(reg_to_write),
+                                      value_to_write);
+}
+
+bool
+RegisterContextPOSIXProcessMonitor_powerpc::ReadRegister(const RegisterInfo *reg_info, RegisterValue &value)
+{
+    if (!reg_info)
+        return false;
+
+    const uint32_t reg = reg_info->kinds[eRegisterKindLLDB];
+
+    if (IsFPR(reg))
+    {
+        if (!ReadFPR())
+            return false;
+    }
+    else
+    {
+        uint32_t full_reg = reg;
+        bool is_subreg = reg_info->invalidate_regs && (reg_info->invalidate_regs[0] != LLDB_INVALID_REGNUM);
+
+        if (is_subreg)
+        {
+            // Read the full aligned 64-bit register.
+            full_reg = reg_info->invalidate_regs[0];
+        }
+
+        bool success = ReadRegister(full_reg, value);
+
+        if (success)
+        {
+            // If our read was not aligned (for ah,bh,ch,dh), shift our returned value one byte to the right.
+            if (is_subreg && (reg_info->byte_offset & 0x1))
+                value.SetUInt64(value.GetAsUInt64() >> 8);
+
+            // If our return byte size was greater than the return value reg size, then
+            // use the type specified by reg_info rather than the uint64_t default
+            if (value.GetByteSize() > reg_info->byte_size)
+                value.SetType(reg_info);
+        }
+        return success;
+    }
+
+    return false;
+}
+
+bool
+RegisterContextPOSIXProcessMonitor_powerpc::WriteRegister(const RegisterInfo *reg_info, const RegisterValue &value)
+{
+    const uint32_t reg = reg_info->kinds[eRegisterKindLLDB];
+
+    if (IsGPR(reg))
+        return WriteRegister(reg, value);
+
+    return false;
+}
+
+bool
+RegisterContextPOSIXProcessMonitor_powerpc::ReadAllRegisterValues(DataBufferSP &data_sp)
+{
+    bool success = false;
+    data_sp.reset (new DataBufferHeap (REG_CONTEXT_SIZE, 0));
+    if (data_sp && ReadGPR () && ReadFPR ())
+    {
+        uint8_t *dst = data_sp->GetBytes();
+        success = dst != 0;
+
+        if (success)
+        {
+            ::memcpy (dst, &m_gpr_powerpc, GetGPRSize());
+            dst += GetGPRSize();
+        }
+    }
+    return success;
+}
+
+bool
+RegisterContextPOSIXProcessMonitor_powerpc::WriteAllRegisterValues(const DataBufferSP &data_sp)
+{
+    bool success = false;
+    if (data_sp && data_sp->GetByteSize() == REG_CONTEXT_SIZE)
+    {
+        uint8_t *src = data_sp->GetBytes();
+        if (src)
+        {
+            ::memcpy (&m_gpr_powerpc, src, GetGPRSize());
+
+            if (WriteGPR())
+            {
+                src += GetGPRSize();
+            }
+        }
+    }
+    return success;
+}
+
+uint32_t
+RegisterContextPOSIXProcessMonitor_powerpc::SetHardwareWatchpoint(addr_t addr, size_t size,
+                                              bool read, bool write)
+{
+    const uint32_t num_hw_watchpoints = NumSupportedHardwareWatchpoints();
+    uint32_t hw_index;
+
+    for (hw_index = 0; hw_index < num_hw_watchpoints; ++hw_index)
+    {
+        if (IsWatchpointVacant(hw_index))
+            return SetHardwareWatchpointWithIndex(addr, size,
+                                                  read, write,
+                                                  hw_index);
+    }
+
+    return LLDB_INVALID_INDEX32;
+}
+
+bool
+RegisterContextPOSIXProcessMonitor_powerpc::ClearHardwareWatchpoint(uint32_t hw_index)
+{
+    return false;
+}
+
+bool
+RegisterContextPOSIXProcessMonitor_powerpc::HardwareSingleStep(bool enable)
+{
+    return false;
+}
+
+bool
+RegisterContextPOSIXProcessMonitor_powerpc::UpdateAfterBreakpoint()
+{
+    lldb::addr_t pc;
+
+    if ((pc = GetPC()) == LLDB_INVALID_ADDRESS)
+        return false;
+
+    return true;
+}
+
+unsigned
+RegisterContextPOSIXProcessMonitor_powerpc::GetRegisterIndexFromOffset(unsigned offset)
+{
+    unsigned reg;
+    for (reg = 0; reg < k_num_registers_powerpc; reg++)
+    {
+        if (GetRegisterInfo()[reg].byte_offset == offset)
+            break;
+    }
+    assert(reg < k_num_registers_powerpc && "Invalid register offset.");
+    return reg;
+}
+
+bool
+RegisterContextPOSIXProcessMonitor_powerpc::IsWatchpointHit(uint32_t hw_index)
+{
+    return false;
+}
+
+bool
+RegisterContextPOSIXProcessMonitor_powerpc::ClearWatchpointHits()
+{
+    return false;
+}
+
+addr_t
+RegisterContextPOSIXProcessMonitor_powerpc::GetWatchpointAddress(uint32_t hw_index)
+{
+    return LLDB_INVALID_ADDRESS;
+}
+
+bool
+RegisterContextPOSIXProcessMonitor_powerpc::IsWatchpointVacant(uint32_t hw_index)
+{
+    return false;
+}
+
+bool
+RegisterContextPOSIXProcessMonitor_powerpc::SetHardwareWatchpointWithIndex(addr_t addr, size_t size,
+                                                       bool read, bool write,
+                                                       uint32_t hw_index)
+{
+    return false;
+}
+
+uint32_t
+RegisterContextPOSIXProcessMonitor_powerpc::NumSupportedHardwareWatchpoints()
+{
+    return 0;
+}
+

source/Plugins/Process/Utility/CMakeLists.txt

add_lldb_library(lldbPluginProcessUtility
   LinuxSignals.cpp
   RegisterContextDarwin_arm.cpp
   RegisterContextDarwin_arm64.cpp
   RegisterContextDarwin_i386.cpp
   RegisterContextDarwin_x86_64.cpp
   RegisterContextDummy.cpp
   RegisterContextFreeBSD_i386.cpp
   RegisterContextFreeBSD_mips64.cpp
+  RegisterContextFreeBSD_powerpc.cpp
   RegisterContextFreeBSD_x86_64.cpp
   RegisterContextHistory.cpp
   RegisterContextLinux_arm64.cpp
   RegisterContextLinux_i386.cpp
   RegisterContextLinux_x86_64.cpp
   RegisterContextLLDB.cpp
   RegisterContextMacOSXFrameBackchain.cpp
   RegisterContextMach_arm.cpp
   RegisterContextMach_i386.cpp
   RegisterContextMach_x86_64.cpp
   RegisterContextMemory.cpp
   RegisterContextPOSIX_arm64.cpp
   RegisterContextPOSIX_mips64.cpp
+  RegisterContextPOSIX_powerpc.cpp
   RegisterContextPOSIX_x86.cpp
   RegisterContextThreadMemory.cpp
   StopInfoMachException.cpp
   ThreadMemory.cpp
   UnwindLLDB.cpp
   UnwindMacOSXFrameBackchain.cpp
   )

source/Plugins/Process/Utility/RegisterContextFreeBSD_powerpc.h

+//===-- RegisterContextFreeBSD_powerpc.h -------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef liblldb_RegisterContextFreeBSD_powerpc_H_
+#define liblldb_RegisterContextFreeBSD_powerpc_H_
+
+#include "RegisterContextPOSIX.h"
+
+class RegisterContextFreeBSD_powerpc:
+    public lldb_private::RegisterInfoInterface
+{
+public:
+    RegisterContextFreeBSD_powerpc(const lldb_private::ArchSpec &target_arch);
+    virtual ~RegisterContextFreeBSD_powerpc();
+
+    size_t
+    GetGPRSize() const override;
+
+    const lldb_private::RegisterInfo *
+    GetRegisterInfo() const override;
+
+    uint32_t
+    GetRegisterCount() const override;
+};
+
+class RegisterContextFreeBSD_powerpc32:
+    public RegisterContextFreeBSD_powerpc
+{
+public:
+    RegisterContextFreeBSD_powerpc32(const lldb_private::ArchSpec &target_arch);
+    virtual ~RegisterContextFreeBSD_powerpc32();
+
+    size_t
+    GetGPRSize() const override;
+
+    const lldb_private::RegisterInfo *
+    GetRegisterInfo() const override;
+
+    uint32_t
+    GetRegisterCount() const override;
+};
+
+class RegisterContextFreeBSD_powerpc64:
+    public RegisterContextFreeBSD_powerpc
+{
+public:
+    RegisterContextFreeBSD_powerpc64(const lldb_private::ArchSpec &target_arch);
+    virtual ~RegisterContextFreeBSD_powerpc64();
+
+    size_t
+    GetGPRSize() const override;
+
+    const lldb_private::RegisterInfo *
+    GetRegisterInfo() const override;
+
+    uint32_t
+    GetRegisterCount() const override;
+};
+
+#endif

source/Plugins/Process/Utility/RegisterContextFreeBSD_powerpc.cpp

+//===-- RegisterContextFreeBSD_powerpc.cpp ----------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===---------------------------------------------------------------------===//
+
+#include <vector>
+#include "RegisterContextPOSIX_powerpc.h"
+#include "RegisterContextFreeBSD_powerpc.h"
+
+using namespace lldb_private;
+using namespace lldb;
+
+// http://svnweb.freebsd.org/base/head/sys/powerpc/include/reg.h
+typedef struct _GPR64
+{
+    uint64_t r0;
+    uint64_t r1;
+    uint64_t r2;
+    uint64_t r3;
+    uint64_t r4;
+    uint64_t r5;
+    uint64_t r6;
+    uint64_t r7;
+    uint64_t r8;
+    uint64_t r9;
+    uint64_t r10;
+    uint64_t r11;
+    uint64_t r12;
+    uint64_t r13;
+    uint64_t r14;
+    uint64_t r15;
+    uint64_t r16;
+    uint64_t r17;
+    uint64_t r18;
+    uint64_t r19;
+    uint64_t r20;
+    uint64_t r21;
+    uint64_t r22;
+    uint64_t r23;
+    uint64_t r24;
+    uint64_t r25;
+    uint64_t r26;
+    uint64_t r27;
+    uint64_t r28;
+    uint64_t r29;
+    uint64_t r30;
+    uint64_t r31;
+    uint64_t lr;
+    uint64_t cr;
+    uint64_t xer;
+    uint64_t ctr;
+    uint64_t pc;
+} GPR64;
+
+typedef struct _GPR32
+{
+    uint32_t r0;
+    uint32_t r1;
+    uint32_t r2;
+    uint32_t r3;
+    uint32_t r4;
+    uint32_t r5;
+    uint32_t r6;
+    uint32_t r7;
+    uint32_t r8;
+    uint32_t r9;
+    uint32_t r10;
+    uint32_t r11;
+    uint32_t r12;
+    uint32_t r13;
+    uint32_t r14;
+    uint32_t r15;
+    uint32_t r16;
+    uint32_t r17;
+    uint32_t r18;
+    uint32_t r19;
+    uint32_t r20;
+    uint32_t r21;
+    uint32_t r22;
+    uint32_t r23;
+    uint32_t r24;
+    uint32_t r25;
+    uint32_t r26;
+    uint32_t r27;
+    uint32_t r28;
+    uint32_t r29;
+    uint32_t r30;
+    uint32_t r31;
+    uint32_t lr;
+    uint32_t cr;
+    uint32_t xer;
+    uint32_t ctr;
+    uint32_t pc;
+} GPR32;
+
+typedef struct _FPR
+{
+    uint64_t f0;
+    uint64_t f1;
+    uint64_t f2;
+    uint64_t f3;
+    uint64_t f4;
+    uint64_t f5;
+    uint64_t f6;
+    uint64_t f7;
+    uint64_t f8;
+    uint64_t f9;
+    uint64_t f10;
+    uint64_t f11;
+    uint64_t f12;
+    uint64_t f13;
+    uint64_t f14;
+    uint64_t f15;
+    uint64_t f16;
+    uint64_t f17;
+    uint64_t f18;
+    uint64_t f19;
+    uint64_t f20;
+    uint64_t f21;
+    uint64_t f22;
+    uint64_t f23;
+    uint64_t f24;
+    uint64_t f25;
+    uint64_t f26;
+    uint64_t f27;
+    uint64_t f28;
+    uint64_t f29;
+    uint64_t f30;
+    uint64_t f31;
+    uint64_t fpscr;
+} FPR;
+
+//---------------------------------------------------------------------------
+// Include RegisterInfos_powerpc to declare our g_register_infos_powerpc structure.
+//---------------------------------------------------------------------------
+#define DECLARE_REGISTER_INFOS_POWERPC_STRUCT
+#include "RegisterInfos_powerpc.h"
+#undef DECLARE_REGISTER_INFOS_POWERPC_STRUCT
+
+RegisterContextFreeBSD_powerpc::RegisterContextFreeBSD_powerpc(const ArchSpec &target_arch) :
+    RegisterInfoInterface(target_arch)
+{
+}
+
+RegisterContextFreeBSD_powerpc::~RegisterContextFreeBSD_powerpc()
+{
+}
+
+size_t
+RegisterContextFreeBSD_powerpc::GetGPRSize() const
+{
+    return sizeof(GPR64);
+}
+
+const RegisterInfo *
+RegisterContextFreeBSD_powerpc::GetRegisterInfo() const
+{
+    //assert (m_target_arch.GetCore() == ArchSpec::eCore_powerpc);
+    llvm_unreachable("Abstract class!");
+    return NULL;
+}
+
+uint32_t
+RegisterContextFreeBSD_powerpc::GetRegisterCount () const
+{
+    return 0;
+}
+
+RegisterContextFreeBSD_powerpc32::RegisterContextFreeBSD_powerpc32(const ArchSpec &target_arch) :
+    RegisterContextFreeBSD_powerpc(target_arch)
+{
+}
+
+RegisterContextFreeBSD_powerpc32::~RegisterContextFreeBSD_powerpc32()
+{
+}
+
+size_t
+RegisterContextFreeBSD_powerpc32::GetGPRSize() const
+{
+    return sizeof(GPR32);
+}
+
+const RegisterInfo *
+RegisterContextFreeBSD_powerpc32::GetRegisterInfo() const
+{
+    //assert (m_target_arch.GetCore() == ArchSpec::eCore_powerpc);
+    return g_register_infos_powerpc32;
+}
+
+uint32_t
+RegisterContextFreeBSD_powerpc32::GetRegisterCount () const
+{
+    return static_cast<uint32_t> (sizeof (g_register_infos_powerpc32) / sizeof (g_register_infos_powerpc32 [0]));
+}
+
+RegisterContextFreeBSD_powerpc64::RegisterContextFreeBSD_powerpc64(const ArchSpec &target_arch) :
+    RegisterContextFreeBSD_powerpc(target_arch)
+{
+}
+
+RegisterContextFreeBSD_powerpc64::~RegisterContextFreeBSD_powerpc64()
+{
+}
+
+size_t
+RegisterContextFreeBSD_powerpc64::GetGPRSize() const
+{
+    return sizeof(GPR64);
+}
+
+const RegisterInfo *
+RegisterContextFreeBSD_powerpc64::GetRegisterInfo() const
+{
+    //assert (m_target_arch.GetCore() == ArchSpec::eCore_powerpc);
+    return g_register_infos_powerpc64;
+}
+
+uint32_t
+RegisterContextFreeBSD_powerpc64::GetRegisterCount () const
+{
+    return static_cast<uint32_t> (sizeof (g_register_infos_powerpc64) / sizeof (g_register_infos_powerpc64 [0]));
+}

source/Plugins/Process/Utility/RegisterContextMacOSXFrameBackchain.cpp

case eEncodingIEEE754:
             {
                 value.SetUInt64(reg_value, RegisterValue::eTypeDouble);
                 return true;
             }
             break;
 
             // TOOD: need a better way to detect when "long double" types are
             // the same bytes size as "double"
-#if !defined(__arm__) && !defined(__arm64__) && !defined(__aarch64__) && !defined(_MSC_VER) && !defined(__mips__)
+#if !defined(__arm__) && !defined(__arm64__) && !defined(__aarch64__) && !defined(_MSC_VER) && \
+    !defined(__mips__) && !defined(__powerpc__)
         case sizeof (long double):
             if (sizeof (long double) == sizeof(uint32_t))
             {
                 value.SetUInt32(reg_value, RegisterValue::eTypeLongDouble);
                 return true;
             }
             else if (sizeof (long double) == sizeof(uint64_t))
             {

source/Plugins/Process/Utility/RegisterContextPOSIX_powerpc.h

+//===-- RegisterContextPOSIX_powerpc.h ---------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef liblldb_RegisterContextPOSIX_powerpc_H_
+#define liblldb_RegisterContextPOSIX_powerpc_H_
+
+#include "lldb/Core/Log.h"
+#include "RegisterContextPOSIX.h"
+#include "RegisterContext_powerpc.h"
+
+class ProcessMonitor;
+
+// ---------------------------------------------------------------------------
+// Internal codes for all powerpc registers.
+// ---------------------------------------------------------------------------
+enum
+{
+    k_first_gpr_powerpc,
+    gpr_r0_powerpc = k_first_gpr_powerpc,
+    gpr_r1_powerpc,
+    gpr_r2_powerpc,
+    gpr_r3_powerpc,
+    gpr_r4_powerpc,
+    gpr_r5_powerpc,
+    gpr_r6_powerpc,
+    gpr_r7_powerpc,
+    gpr_r8_powerpc,
+    gpr_r9_powerpc,
+    gpr_r10_powerpc,
+    gpr_r11_powerpc,
+    gpr_r12_powerpc,
+    gpr_r13_powerpc,
+    gpr_r14_powerpc,
+    gpr_r15_powerpc,
+    gpr_r16_powerpc,
+    gpr_r17_powerpc,
+    gpr_r18_powerpc,
+    gpr_r19_powerpc,
+    gpr_r20_powerpc,
+    gpr_r21_powerpc,
+    gpr_r22_powerpc,
+    gpr_r23_powerpc,
+    gpr_r24_powerpc,
+    gpr_r25_powerpc,
+    gpr_r26_powerpc,
+    gpr_r27_powerpc,
+    gpr_r28_powerpc,
+    gpr_r29_powerpc,
+    gpr_r30_powerpc,
+    gpr_r31_powerpc,
+    gpr_lr_powerpc,
+    gpr_cr_powerpc,
+    gpr_xer_powerpc,
+    gpr_ctr_powerpc,
+    gpr_pc_powerpc,
+    k_last_gpr_powerpc = gpr_pc_powerpc,
+
+    k_first_fpr,
+    fpr_f0_powerpc = k_first_fpr,
+    fpr_f1_powerpc,
+    fpr_f2_powerpc,
+    fpr_f3_powerpc,
+    fpr_f4_powerpc,
+    fpr_f5_powerpc,
+    fpr_f6_powerpc,
+    fpr_f7_powerpc,
+    fpr_f8_powerpc,
+    fpr_f9_powerpc,
+    fpr_f10_powerpc,
+    fpr_f11_powerpc,
+    fpr_f12_powerpc,
+    fpr_f13_powerpc,
+    fpr_f14_powerpc,
+    fpr_f15_powerpc,
+    fpr_f16_powerpc,
+    fpr_f17_powerpc,
+    fpr_f18_powerpc,
+    fpr_f19_powerpc,
+    fpr_f20_powerpc,
+    fpr_f21_powerpc,
+    fpr_f22_powerpc,
+    fpr_f23_powerpc,
+    fpr_f24_powerpc,
+    fpr_f25_powerpc,
+    fpr_f26_powerpc,
+    fpr_f27_powerpc,
+    fpr_f28_powerpc,
+    fpr_f29_powerpc,
+    fpr_f30_powerpc,
+    fpr_f31_powerpc,
+    fpr_fpscr_powerpc,
+    k_last_fpr = fpr_fpscr_powerpc,
+
+    k_num_registers_powerpc,
+    k_num_gpr_registers_powerpc = k_last_gpr_powerpc - k_first_gpr_powerpc + 1,
+    k_num_fpr_registers_powerpc = k_last_fpr - k_first_fpr + 1,
+};
+
+class RegisterContextPOSIX_powerpc
+  : public lldb_private::RegisterContext
+{
+public:
+    RegisterContextPOSIX_powerpc (lldb_private::Thread &thread,
+                            uint32_t concrete_frame_idx,
+                            lldb_private::RegisterInfoInterface *register_info);
+
+    ~RegisterContextPOSIX_powerpc();
+
+    void
+    Invalidate();
+
+    void
+    InvalidateAllRegisters();
+
+    size_t
+    GetRegisterCount();
+
+    virtual size_t
+    GetGPRSize();
+
+    virtual unsigned
+    GetRegisterSize(unsigned reg);
+
+    virtual unsigned
+    GetRegisterOffset(unsigned reg);
+
+    const lldb_private::RegisterInfo *
+    GetRegisterInfoAtIndex(size_t reg);
+
+    size_t
+    GetRegisterSetCount();
+
+    const lldb_private::RegisterSet *
+    GetRegisterSet(size_t set);
+
+    const char *
+    GetRegisterName(unsigned reg);
+
+    uint32_t
+    ConvertRegisterKindToRegisterNumber(lldb::RegisterKind kind, uint32_t num);
+
+protected:
+    uint64_t m_gpr_powerpc[k_num_gpr_registers_powerpc];         // general purpose registers.
+    std::unique_ptr<lldb_private::RegisterInfoInterface> m_register_info_ap; // Register Info Interface (FreeBSD or Linux)
+
+    // Determines if an extended register set is supported on the processor running the inferior process.
+    virtual bool
+    IsRegisterSetAvailable(size_t set_index);
+
+    virtual const lldb_private::RegisterInfo *
+    GetRegisterInfo();
+
+    bool
+    IsGPR(unsigned reg);
+
+    bool
+    IsFPR(unsigned reg);
+
+    lldb::ByteOrder GetByteOrder();
+
+    virtual bool ReadGPR() = 0;
+    virtual bool ReadFPR() = 0;
+    virtual bool WriteGPR() = 0;
+    virtual bool WriteFPR() = 0;
+};
+
+#endif // #ifndef liblldb_RegisterContextPOSIX_powerpc_H_

source/Plugins/Process/Utility/RegisterContextPOSIX_powerpc.cpp

+//===-- RegisterContextPOSIX_powerpc.cpp -------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include <cstring>
+#include <errno.h>
+#include <stdint.h>
+
+#include "lldb/Core/DataBufferHeap.h"
+#include "lldb/Core/DataExtractor.h"
+#include "lldb/Core/RegisterValue.h"
+#include "lldb/Core/Scalar.h"
+#include "lldb/Target/Target.h"
+#include "lldb/Target/Thread.h"
+#include "lldb/Host/Endian.h"
+#include "llvm/Support/Compiler.h"
+
+#include "RegisterContextPOSIX_powerpc.h"
+#include "Plugins/Process/elf-core/ProcessElfCore.h"
+
+using namespace lldb_private;
+using namespace lldb;
+
+static const
+uint32_t g_gpr_regnums[] =
+{
+    gpr_r0_powerpc,
+    gpr_r1_powerpc,
+    gpr_r2_powerpc,
+    gpr_r3_powerpc,
+    gpr_r4_powerpc,
+    gpr_r5_powerpc,
+    gpr_r6_powerpc,
+    gpr_r7_powerpc,
+    gpr_r8_powerpc,
+    gpr_r9_powerpc,
+    gpr_r10_powerpc,
+    gpr_r11_powerpc,
+    gpr_r12_powerpc,
+    gpr_r13_powerpc,
+    gpr_r14_powerpc,
+    gpr_r15_powerpc,
+    gpr_r16_powerpc,
+    gpr_r17_powerpc,
+    gpr_r18_powerpc,
+    gpr_r19_powerpc,
+    gpr_r20_powerpc,
+    gpr_r21_powerpc,
+    gpr_r22_powerpc,
+    gpr_r23_powerpc,
+    gpr_r24_powerpc,
+    gpr_r25_powerpc,
+    gpr_r26_powerpc,
+    gpr_r27_powerpc,
+    gpr_r28_powerpc,
+    gpr_r29_powerpc,
+    gpr_r30_powerpc,
+    gpr_r31_powerpc,
+    gpr_lr_powerpc,
+    gpr_cr_powerpc,
+    gpr_xer_powerpc,
+    gpr_ctr_powerpc,
+    gpr_pc_powerpc,
+};
+
+static const
+uint32_t g_fpr_regnums[] =
+{
+    fpr_f0_powerpc,
+    fpr_f1_powerpc,
+    fpr_f2_powerpc,
+    fpr_f3_powerpc,
+    fpr_f4_powerpc,
+    fpr_f5_powerpc,
+    fpr_f6_powerpc,
+    fpr_f7_powerpc,
+    fpr_f8_powerpc,
+    fpr_f9_powerpc,
+    fpr_f10_powerpc,
+    fpr_f11_powerpc,
+    fpr_f12_powerpc,
+    fpr_f13_powerpc,
+    fpr_f14_powerpc,
+    fpr_f15_powerpc,
+    fpr_f16_powerpc,
+    fpr_f17_powerpc,
+    fpr_f18_powerpc,
+    fpr_f19_powerpc,
+    fpr_f20_powerpc,
+    fpr_f21_powerpc,
+    fpr_f22_powerpc,
+    fpr_f23_powerpc,
+    fpr_f24_powerpc,
+    fpr_f25_powerpc,
+    fpr_f26_powerpc,
+    fpr_f27_powerpc,
+    fpr_f28_powerpc,
+    fpr_f29_powerpc,
+    fpr_f30_powerpc,
+    fpr_f31_powerpc,
+    fpr_fpscr_powerpc,
+};
+
+// Number of register sets provided by this context.
+enum
+{
+    k_num_register_sets = 2
+};
+
+static const RegisterSet
+g_reg_sets_powerpc[k_num_register_sets] =
+{
+    { "General Purpose Registers",  "gpr", k_num_gpr_registers_powerpc, g_gpr_regnums },
+    { "Floating Point Registers",  "fpr", k_num_fpr_registers_powerpc, g_fpr_regnums },
+};
+
+bool RegisterContextPOSIX_powerpc::IsGPR(unsigned reg)
+{
+    return reg <= k_num_gpr_registers_powerpc;   // GPR's come first.
+}
+
+bool
+RegisterContextPOSIX_powerpc::IsFPR(unsigned reg)
+{
+    // XXX
+    return (reg >= k_first_fpr) && (reg <= k_last_fpr);
+}
+
+RegisterContextPOSIX_powerpc::RegisterContextPOSIX_powerpc(Thread &thread,
+                                               uint32_t concrete_frame_idx,
+                                               RegisterInfoInterface *register_info)
+    : RegisterContext(thread, concrete_frame_idx)
+{
+    m_register_info_ap.reset(register_info);
+
+    // elf-core yet to support ReadFPR()
+    ProcessSP base = CalculateProcess();
+    if (base.get()->GetPluginName() ==  ProcessElfCore::GetPluginNameStatic())
+        return;
+}
+
+RegisterContextPOSIX_powerpc::~RegisterContextPOSIX_powerpc()
+{
+}
+
+void
+RegisterContextPOSIX_powerpc::Invalidate()
+{
+}
+
+void
+RegisterContextPOSIX_powerpc::InvalidateAllRegisters()
+{
+}
+
+unsigned
+RegisterContextPOSIX_powerpc::GetRegisterOffset(unsigned reg)
+{
+    assert(reg < k_num_registers_powerpc && "Invalid register number.");
+    return GetRegisterInfo()[reg].byte_offset;
+}
+
+unsigned
+RegisterContextPOSIX_powerpc::GetRegisterSize(unsigned reg)
+{
+    assert(reg < k_num_registers_powerpc && "Invalid register number.");
+    return GetRegisterInfo()[reg].byte_size;
+}
+
+size_t
+RegisterContextPOSIX_powerpc::GetRegisterCount()
+{
+    size_t num_registers = k_num_registers_powerpc;
+    return num_registers;
+}
+
+size_t
+RegisterContextPOSIX_powerpc::GetGPRSize()
+{
+    return m_register_info_ap->GetGPRSize();
+}
+
+const RegisterInfo *
+RegisterContextPOSIX_powerpc::GetRegisterInfo()
+{
+    // Commonly, this method is overridden and g_register_infos is copied and specialized.
+    // So, use GetRegisterInfo() rather than g_register_infos in this scope.
+    return m_register_info_ap->GetRegisterInfo ();
+}
+
+const RegisterInfo *
+RegisterContextPOSIX_powerpc::GetRegisterInfoAtIndex(size_t reg)
+{
+    if (reg < k_num_registers_powerpc)
+        return &GetRegisterInfo()[reg];
+    else
+        return NULL;
+}
+
+size_t
+RegisterContextPOSIX_powerpc::GetRegisterSetCount()
+{
+    size_t sets = 0;
+    for (size_t set = 0; set < k_num_register_sets; ++set)
+    {
+        if (IsRegisterSetAvailable(set))
+            ++sets;
+    }
+
+    return sets;
+}
+
+const RegisterSet *
+RegisterContextPOSIX_powerpc::GetRegisterSet(size_t set)
+{
+    if (IsRegisterSetAvailable(set))
+        return &g_reg_sets_powerpc[set];
+    else
+        return NULL;
+}
+
+const char *
+RegisterContextPOSIX_powerpc::GetRegisterName(unsigned reg)
+{
+    assert(reg < k_num_registers_powerpc && "Invalid register offset.");
+    return GetRegisterInfo()[reg].name;
+}
+
+lldb::ByteOrder
+RegisterContextPOSIX_powerpc::GetByteOrder()
+{
+    // Get the target process whose privileged thread was used for the register read.
+    lldb::ByteOrder byte_order = eByteOrderInvalid;
+    Process *process = CalculateProcess().get();
+
+    if (process)
+        byte_order = process->GetByteOrder();
+    return byte_order;
+}
+
+bool
+RegisterContextPOSIX_powerpc::IsRegisterSetAvailable(size_t set_index)
+{
+    size_t num_sets = k_num_register_sets;
+
+    return (set_index < num_sets);
+}
+
+// Used when parsing DWARF and EH frame information and any other
+// object file sections that contain register numbers in them.
+uint32_t
+RegisterContextPOSIX_powerpc::ConvertRegisterKindToRegisterNumber(lldb::RegisterKind kind,
+                                                                 uint32_t num)
+{
+    const uint32_t num_regs = GetRegisterCount();
+
+    assert (kind < kNumRegisterKinds);
+    for (uint32_t reg_idx = 0; reg_idx < num_regs; ++reg_idx)
+    {
+        const RegisterInfo *reg_info = GetRegisterInfoAtIndex (reg_idx);
+
+        if (reg_info->kinds[kind] == num)
+            return reg_idx;
+    }
+
+    return LLDB_INVALID_REGNUM;
+}
+

source/Plugins/Process/Utility/RegisterContext_powerpc.h

+//===-- RegisterContext_powerpc.h --------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef liblldb_RegisterContext_powerpc_H_
+#define liblldb_RegisterContext_powerpc_H_
+
+// GCC and DWARF Register numbers (eRegisterKindGCC & eRegisterKindDWARF)
+enum
+{
+    gcc_dwarf_r0_powerpc = 0,
+    gcc_dwarf_r1_powerpc,
+    gcc_dwarf_r2_powerpc,
+    gcc_dwarf_r3_powerpc,
+    gcc_dwarf_r4_powerpc,
+    gcc_dwarf_r5_powerpc,
+    gcc_dwarf_r6_powerpc,
+    gcc_dwarf_r7_powerpc,
+    gcc_dwarf_r8_powerpc,
+    gcc_dwarf_r9_powerpc,
+    gcc_dwarf_r10_powerpc,
+    gcc_dwarf_r11_powerpc,
+    gcc_dwarf_r12_powerpc,
+    gcc_dwarf_r13_powerpc,
+    gcc_dwarf_r14_powerpc,
+    gcc_dwarf_r15_powerpc,
+    gcc_dwarf_r16_powerpc,
+    gcc_dwarf_r17_powerpc,
+    gcc_dwarf_r18_powerpc,
+    gcc_dwarf_r19_powerpc,
+    gcc_dwarf_r20_powerpc,
+    gcc_dwarf_r21_powerpc,
+    gcc_dwarf_r22_powerpc,
+    gcc_dwarf_r23_powerpc,
+    gcc_dwarf_r24_powerpc,
+    gcc_dwarf_r25_powerpc,
+    gcc_dwarf_r26_powerpc,
+    gcc_dwarf_r27_powerpc,
+    gcc_dwarf_r28_powerpc,
+    gcc_dwarf_r29_powerpc,
+    gcc_dwarf_r30_powerpc,
+    gcc_dwarf_r31_powerpc,
+    gcc_dwarf_f0_powerpc,
+    gcc_dwarf_f1_powerpc,
+    gcc_dwarf_f2_powerpc,
+    gcc_dwarf_f3_powerpc,
+    gcc_dwarf_f4_powerpc,
+    gcc_dwarf_f5_powerpc,
+    gcc_dwarf_f6_powerpc,
+    gcc_dwarf_f7_powerpc,
+    gcc_dwarf_f8_powerpc,
+    gcc_dwarf_f9_powerpc,
+    gcc_dwarf_f10_powerpc,
+    gcc_dwarf_f11_powerpc,
+    gcc_dwarf_f12_powerpc,
+    gcc_dwarf_f13_powerpc,
+    gcc_dwarf_f14_powerpc,
+    gcc_dwarf_f15_powerpc,
+    gcc_dwarf_f16_powerpc,
+    gcc_dwarf_f17_powerpc,
+    gcc_dwarf_f18_powerpc,
+    gcc_dwarf_f19_powerpc,
+    gcc_dwarf_f20_powerpc,
+    gcc_dwarf_f21_powerpc,
+    gcc_dwarf_f22_powerpc,
+    gcc_dwarf_f23_powerpc,
+    gcc_dwarf_f24_powerpc,
+    gcc_dwarf_f25_powerpc,
+    gcc_dwarf_f26_powerpc,
+    gcc_dwarf_f27_powerpc,
+    gcc_dwarf_f28_powerpc,
+    gcc_dwarf_f29_powerpc,
+    gcc_dwarf_f30_powerpc,
+    gcc_dwarf_f31_powerpc,
+    gcc_dwarf_cr_powerpc,
+    gcc_dwarf_fpscr_powerpc,
+    gcc_dwarf_xer_powerpc = 101,
+    gcc_dwarf_lr_powerpc = 108,
+    gcc_dwarf_ctr_powerpc,
+    gcc_dwarf_pc_powerpc,
+};
+
+// GDB Register numbers (eRegisterKindGDB)
+enum
+{
+    gdb_r0_powerpc = 0,
+    gdb_r1_powerpc,
+    gdb_r2_powerpc,
+    gdb_r3_powerpc,
+    gdb_r4_powerpc,
+    gdb_r5_powerpc,
+    gdb_r6_powerpc,
+    gdb_r7_powerpc,
+    gdb_r8_powerpc,
+    gdb_r9_powerpc,
+    gdb_r10_powerpc,
+    gdb_r11_powerpc,
+    gdb_r12_powerpc,
+    gdb_r13_powerpc,
+    gdb_r14_powerpc,
+    gdb_r15_powerpc,
+    gdb_r16_powerpc,
+    gdb_r17_powerpc,
+    gdb_r18_powerpc,
+    gdb_r19_powerpc,
+    gdb_r20_powerpc,
+    gdb_r21_powerpc,
+    gdb_r22_powerpc,
+    gdb_r23_powerpc,
+    gdb_r24_powerpc,
+    gdb_r25_powerpc,
+    gdb_r26_powerpc,
+    gdb_r27_powerpc,
+    gdb_r28_powerpc,
+    gdb_r29_powerpc,
+    gdb_r30_powerpc,
+    gdb_r31_powerpc,
+    gdb_f0_powerpc,
+    gdb_f1_powerpc,
+    gdb_f2_powerpc,
+    gdb_f3_powerpc,
+    gdb_f4_powerpc,
+    gdb_f5_powerpc,
+    gdb_f6_powerpc,
+    gdb_f7_powerpc,
+    gdb_f8_powerpc,
+    gdb_f9_powerpc,
+    gdb_f10_powerpc,
+    gdb_f11_powerpc,
+    gdb_f12_powerpc,
+    gdb_f13_powerpc,
+    gdb_f14_powerpc,
+    gdb_f15_powerpc,
+    gdb_f16_powerpc,
+    gdb_f17_powerpc,
+    gdb_f18_powerpc,
+    gdb_f19_powerpc,
+    gdb_f20_powerpc,
+    gdb_f21_powerpc,
+    gdb_f22_powerpc,
+    gdb_f23_powerpc,
+    gdb_f24_powerpc,
+    gdb_f25_powerpc,
+    gdb_f26_powerpc,
+    gdb_f27_powerpc,
+    gdb_f28_powerpc,
+    gdb_f29_powerpc,
+    gdb_f30_powerpc,
+    gdb_f31_powerpc,
+    gdb_cr_powerpc,
+    gdb_fpscr_powerpc,
+    gdb_xer_powerpc = 101,
+    gdb_lr_powerpc = 108,
+    gdb_ctr_powerpc,
+    gdb_pc_powerpc,
+};
+
+#endif // liblldb_RegisterContext_powerpc_H_

source/Plugins/Process/Utility/RegisterInfos_powerpc.h

+//===-- RegisterInfos_powerpc.h ---------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===---------------------------------------------------------------------===//
+
+#include <stddef.h>
+
+// Computes the offset of the given GPR in the user data area.
+#define GPR_OFFSET(regname)                                                 \
+    (offsetof(GPR, regname))
+#define FPR_OFFSET(regname)                                                 \
+    (offsetof(FPR, regname))
+
+#ifdef DECLARE_REGISTER_INFOS_POWERPC_STRUCT
+
+// Note that the size and offset will be updated by platform-specific classes.
+#define DEFINE_GPR(reg, alt, lldb_kind)           \
+    { #reg, alt, sizeof(((GPR*)NULL)->reg), GPR_OFFSET(reg), eEncodingUint, \
+      eFormatHex, { gcc_dwarf_##reg##_powerpc, gcc_dwarf_##reg##_powerpc, lldb_kind, gdb_##reg##_powerpc, gpr_##reg##_powerpc }, NULL, NULL }
+#define DEFINE_FPR(reg, lldb_kind)           \
+    { #reg, NULL, 8, FPR_OFFSET(reg), eEncodingIEEE754, \
+      eFormatFloat, { gcc_dwarf_##reg##_powerpc, gcc_dwarf_##reg##_powerpc, lldb_kind, gdb_##reg##_powerpc, fpr_##reg##_powerpc }, NULL, NULL }
+
+    // General purpose registers.                 GCC,                  DWARF,              Generic,                GDB
+#define POWERPC_REGS \
+    DEFINE_GPR(r0,       NULL,  LLDB_INVALID_REGNUM), \
+    DEFINE_GPR(r1,       "sp",  LLDB_REGNUM_GENERIC_SP), \
+    DEFINE_GPR(r2,       NULL,  LLDB_INVALID_REGNUM), \
+    DEFINE_GPR(r3,       "arg1",LLDB_REGNUM_GENERIC_ARG1), \
+    DEFINE_GPR(r4,       "arg2",LLDB_REGNUM_GENERIC_ARG2), \
+    DEFINE_GPR(r5,       "arg3",LLDB_REGNUM_GENERIC_ARG3), \
+    DEFINE_GPR(r6,       "arg4",LLDB_REGNUM_GENERIC_ARG4), \
+    DEFINE_GPR(r7,       "arg5",LLDB_REGNUM_GENERIC_ARG5), \
+    DEFINE_GPR(r8,       "arg6",LLDB_REGNUM_GENERIC_ARG6), \
+    DEFINE_GPR(r9,       "arg7",LLDB_REGNUM_GENERIC_ARG7), \
+    DEFINE_GPR(r10,      "arg8",LLDB_REGNUM_GENERIC_ARG8), \
+    DEFINE_GPR(r11,      NULL,  LLDB_INVALID_REGNUM), \
+    DEFINE_GPR(r12,      NULL,  LLDB_INVALID_REGNUM), \
+    DEFINE_GPR(r13,      NULL,  LLDB_INVALID_REGNUM), \
+    DEFINE_GPR(r14,      NULL,  LLDB_INVALID_REGNUM), \
+    DEFINE_GPR(r15,      NULL,  LLDB_INVALID_REGNUM), \
+    DEFINE_GPR(r16,      NULL,  LLDB_INVALID_REGNUM), \
+    DEFINE_GPR(r17,      NULL,  LLDB_INVALID_REGNUM), \
+    DEFINE_GPR(r18,      NULL,  LLDB_INVALID_REGNUM), \
+    DEFINE_GPR(r19,      NULL,  LLDB_INVALID_REGNUM), \
+    DEFINE_GPR(r20,      NULL,  LLDB_INVALID_REGNUM), \
+    DEFINE_GPR(r21,      NULL,  LLDB_INVALID_REGNUM), \
+    DEFINE_GPR(r22,      NULL,  LLDB_INVALID_REGNUM), \
+    DEFINE_GPR(r23,      NULL,  LLDB_INVALID_REGNUM), \
+    DEFINE_GPR(r24,      NULL,  LLDB_INVALID_REGNUM), \
+    DEFINE_GPR(r25,      NULL,  LLDB_INVALID_REGNUM), \
+    DEFINE_GPR(r26,      NULL,  LLDB_INVALID_REGNUM), \
+    DEFINE_GPR(r27,      NULL,  LLDB_INVALID_REGNUM), \
+    DEFINE_GPR(r28,      NULL,  LLDB_INVALID_REGNUM), \
+    DEFINE_GPR(r29,      NULL,  LLDB_INVALID_REGNUM), \
+    DEFINE_GPR(r30,      NULL,  LLDB_INVALID_REGNUM), \
+    DEFINE_GPR(r31,      NULL,  LLDB_INVALID_REGNUM), \
+    DEFINE_GPR(lr,       "lr",  LLDB_REGNUM_GENERIC_RA), \
+    DEFINE_GPR(cr,       "cr",  LLDB_REGNUM_GENERIC_FLAGS), \
+    DEFINE_GPR(xer,      "xer", LLDB_INVALID_REGNUM), \
+    DEFINE_GPR(ctr,      "ctr", LLDB_INVALID_REGNUM), \
+    DEFINE_GPR(pc,       "pc",  LLDB_REGNUM_GENERIC_PC), \
+    DEFINE_FPR(f0,       LLDB_INVALID_REGNUM), \
+    DEFINE_FPR(f1,       LLDB_INVALID_REGNUM), \
+    DEFINE_FPR(f2,       LLDB_INVALID_REGNUM), \
+    DEFINE_FPR(f3,       LLDB_INVALID_REGNUM), \
+    DEFINE_FPR(f4,       LLDB_INVALID_REGNUM), \
+    DEFINE_FPR(f5,       LLDB_INVALID_REGNUM), \
+    DEFINE_FPR(f6,       LLDB_INVALID_REGNUM), \
+    DEFINE_FPR(f7,       LLDB_INVALID_REGNUM), \
+    DEFINE_FPR(f8,       LLDB_INVALID_REGNUM), \
+    DEFINE_FPR(f9,       LLDB_INVALID_REGNUM), \
+    DEFINE_FPR(f10,      LLDB_INVALID_REGNUM), \
+    DEFINE_FPR(f11,      LLDB_INVALID_REGNUM), \
+    DEFINE_FPR(f12,      LLDB_INVALID_REGNUM), \
+    DEFINE_FPR(f13,      LLDB_INVALID_REGNUM), \
+    DEFINE_FPR(f14,      LLDB_INVALID_REGNUM), \
+    DEFINE_FPR(f15,      LLDB_INVALID_REGNUM), \
+    DEFINE_FPR(f16,      LLDB_INVALID_REGNUM), \
+    DEFINE_FPR(f17,      LLDB_INVALID_REGNUM), \
+    DEFINE_FPR(f18,      LLDB_INVALID_REGNUM), \
+    DEFINE_FPR(f19,      LLDB_INVALID_REGNUM), \
+    DEFINE_FPR(f20,      LLDB_INVALID_REGNUM), \
+    DEFINE_FPR(f21,      LLDB_INVALID_REGNUM), \
+    DEFINE_FPR(f22,      LLDB_INVALID_REGNUM), \
+    DEFINE_FPR(f23,      LLDB_INVALID_REGNUM), \
+    DEFINE_FPR(f24,      LLDB_INVALID_REGNUM), \
+    DEFINE_FPR(f25,      LLDB_INVALID_REGNUM), \
+    DEFINE_FPR(f26,      LLDB_INVALID_REGNUM), \
+    DEFINE_FPR(f27,      LLDB_INVALID_REGNUM), \
+    DEFINE_FPR(f28,      LLDB_INVALID_REGNUM), \
+    DEFINE_FPR(f29,      LLDB_INVALID_REGNUM), \
+    DEFINE_FPR(f30,      LLDB_INVALID_REGNUM), \
+    DEFINE_FPR(f31,      LLDB_INVALID_REGNUM), \
+    { "fpscr", NULL, 8, FPR_OFFSET(fpscr), eEncodingUint, eFormatHex, { gcc_dwarf_fpscr_powerpc, gcc_dwarf_fpscr_powerpc, LLDB_INVALID_REGNUM, gdb_fpscr_powerpc, fpr_fpscr_powerpc }, NULL, NULL },
+    //{ NULL, NULL, sizeof(((GPR*)NULL)->r0), 0, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, gpr_cfa_powerpc}, NULL, NULL}
+static RegisterInfo
+g_register_infos_powerpc64[] =
+{
+#define GPR GPR64
+    POWERPC_REGS
+#undef GPR
+};
+
+static RegisterInfo
+g_register_infos_powerpc32[] =
+{
+#define GPR GPR32
+    POWERPC_REGS
+#undef GPR
+};
+static_assert((sizeof(g_register_infos_powerpc32) / sizeof(g_register_infos_powerpc32[0])) == k_num_registers_powerpc,
+    "g_register_infos_powerpc32 has wrong number of register infos");
+static_assert((sizeof(g_register_infos_powerpc64) / sizeof(g_register_infos_powerpc64[0])) == k_num_registers_powerpc,
+    "g_register_infos_powerpc64 has wrong number of register infos");
+
+#undef DEFINE_FPR
+#undef DEFINE_GPR
+
+#endif // DECLARE_REGISTER_INFOS_POWERPC_STRUCT
+
+#undef GPR_OFFSET
+

source/Plugins/Process/elf-core/CMakeLists.txt

 include_directories(../Utility)
 
 set(LLVM_NO_RTTI 1)
 
 add_lldb_library(lldbPluginProcessElfCore
   ProcessElfCore.cpp
   ThreadElfCore.cpp
   RegisterContextPOSIXCore_mips64.cpp
+  RegisterContextPOSIXCore_powerpc.cpp
   RegisterContextPOSIXCore_x86_64.cpp
   )

source/Plugins/Process/elf-core/ProcessElfCore.cpp

 
 // Parse a FreeBSD NT_PRSTATUS note - see FreeBSD sys/procfs.h for details.
 static void
 ParseFreeBSDPrStatus(ThreadData &thread_data, DataExtractor &data,
                      ArchSpec &arch)
 {
     lldb::offset_t offset = 0;
     bool lp64 = (arch.GetMachine() == llvm::Triple::mips64 ||
+                 arch.GetMachine() == llvm::Triple::ppc64 ||
                  arch.GetMachine() == llvm::Triple::x86_64);
     int pr_version = data.GetU32(&offset);
 
     Log *log (GetLogIfAllCategoriesSet(LIBLLDB_LOG_PROCESS));
     if (log)
     {
         if (pr_version > 1)
             log->Printf("FreeBSD PRSTATUS unexpected version %d", pr_version);

source/Plugins/Process/elf-core/RegisterContextPOSIXCore_powerpc.h

+//===-- RegisterContextCorePOSIX_powerpc.h ----------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===---------------------------------------------------------------------===//
+
+#ifndef liblldb_RegisterContextCorePOSIX_powerpc_H_
+#define liblldb_RegisterContextCorePOSIX_powerpc_H_
+
+#include "lldb/Core/DataBufferHeap.h"
+#include "Plugins/Process/Utility/RegisterContextPOSIX_powerpc.h"
+
+class RegisterContextCorePOSIX_powerpc :
+    public RegisterContextPOSIX_powerpc
+{
+public:
+    RegisterContextCorePOSIX_powerpc (lldb_private::Thread &thread,
+                                     lldb_private::RegisterInfoInterface *register_info,
+                                     const lldb_private::DataExtractor &gpregset,
+                                     const lldb_private::DataExtractor &fpregset);
+
+    ~RegisterContextCorePOSIX_powerpc();
+
+    virtual bool
+    ReadRegister(const lldb_private::RegisterInfo *reg_info, lldb_private::RegisterValue &value);
+
+    virtual bool
+    WriteRegister(const lldb_private::RegisterInfo *reg_info, const lldb_private::RegisterValue &value);
+
+    bool
+    ReadAllRegisterValues(lldb::DataBufferSP &data_sp);
+
+    bool
+    WriteAllRegisterValues(const lldb::DataBufferSP &data_sp);
+
+    bool
+    HardwareSingleStep(bool enable);
+
+protected:
+    bool
+    ReadGPR();
+
+    bool
+    ReadFPR();
+
+    bool
+    WriteGPR();
+
+    bool
+    WriteFPR();
+
+private:
+    lldb::DataBufferSP m_gpr_buffer;
+    lldb::DataBufferSP m_fpr_buffer;
+    lldb_private::DataExtractor m_gpr;
+    lldb_private::DataExtractor m_fpr;
+};
+
+#endif // #ifndef liblldb_RegisterContextCorePOSIX_powerpc_H_

source/Plugins/Process/elf-core/RegisterContextPOSIXCore_powerpc.cpp

+//===-- RegisterContextCorePOSIX_powerpc.cpp ---------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "lldb/Core/DataExtractor.h"
+#include "lldb/Core/RegisterValue.h"
+#include "lldb/Target/Thread.h"
+#include "RegisterContextPOSIX.h"
+#include "RegisterContextPOSIXCore_powerpc.h"
+
+using namespace lldb_private;
+
+RegisterContextCorePOSIX_powerpc::RegisterContextCorePOSIX_powerpc(Thread &thread,
+                                                                 RegisterInfoInterface *register_info,
+                                                                 const DataExtractor &gpregset,
+                                                                 const DataExtractor &fpregset)
+    : RegisterContextPOSIX_powerpc(thread, 0, register_info)
+{
+    m_gpr_buffer.reset(new DataBufferHeap(gpregset.GetDataStart(), gpregset.GetByteSize()));
+    m_gpr.SetData(m_gpr_buffer);
+    m_gpr.SetByteOrder(gpregset.GetByteOrder());
+    m_fpr_buffer.reset(new DataBufferHeap(fpregset.GetDataStart(), fpregset.GetByteSize()));
+    m_fpr.SetData(m_fpr_buffer);
+    m_fpr.SetByteOrder(fpregset.GetByteOrder());
+}
+
+RegisterContextCorePOSIX_powerpc::~RegisterContextCorePOSIX_powerpc()
+{
+}
+
+bool
+RegisterContextCorePOSIX_powerpc::ReadGPR()
+{
+    return true;
+}
+
+bool
+RegisterContextCorePOSIX_powerpc::ReadFPR()
+{
+    return true;
+}
+
+bool
+RegisterContextCorePOSIX_powerpc::WriteGPR()
+{
+    assert(0);
+    return false;
+}
+
+bool
+RegisterContextCorePOSIX_powerpc::WriteFPR()
+{
+    assert(0);
+    return false;
+}
+
+bool
+RegisterContextCorePOSIX_powerpc::ReadRegister(const RegisterInfo *reg_info, RegisterValue &value)
+{
+    lldb::offset_t offset = reg_info->byte_offset;
+    if (reg_info->name[0] == 'f') {
+        uint64_t v = m_fpr.GetMaxU64(&offset, reg_info->byte_size);
+        if (offset == reg_info->byte_offset + reg_info->byte_size)
+        {
+            value = v;
+            return true;
+        }
+    } else {
+        uint64_t v = m_gpr.GetMaxU64(&offset, reg_info->byte_size);
+        if (offset == reg_info->byte_offset + reg_info->byte_size)
+        {
+            if (reg_info->byte_size < sizeof(v))
+                value = (uint32_t)v;
+            else
+                value = v;
+            return true;
+        }
+    }
+    return false;
+}
+
+bool
+RegisterContextCorePOSIX_powerpc::ReadAllRegisterValues(lldb::DataBufferSP &data_sp)
+{
+    return false;
+}
+
+bool
+RegisterContextCorePOSIX_powerpc::WriteRegister(const RegisterInfo *reg_info, const RegisterValue &value)
+{
+    return false;
+}
+
+bool
+RegisterContextCorePOSIX_powerpc::WriteAllRegisterValues(const lldb::DataBufferSP &data_sp)
+{
+    return false;
+}
+
+bool
+RegisterContextCorePOSIX_powerpc::HardwareSingleStep(bool enable)
+{
+    return false;
+}

source/Plugins/Process/elf-core/ThreadElfCore.cpp

 #include "lldb/Target/Target.h"
 #include "lldb/Target/Unwind.h"
 
 #include "ThreadElfCore.h"
 #include "ProcessElfCore.h"
 #include "Plugins/Process/Utility/RegisterContextLinux_x86_64.h"
 #include "Plugins/Process/Utility/RegisterContextFreeBSD_i386.h"
 #include "Plugins/Process/Utility/RegisterContextFreeBSD_mips64.h"
+#include "Plugins/Process/Utility/RegisterContextFreeBSD_powerpc.h"
 #include "Plugins/Process/Utility/RegisterContextFreeBSD_x86_64.h"
 #include "RegisterContextPOSIXCore_mips64.h"
+#include "RegisterContextPOSIXCore_powerpc.h"
 #include "RegisterContextPOSIXCore_x86_64.h"
 
 using namespace lldb;
 using namespace lldb_private;
 
 //----------------------------------------------------------------------
 // Construct a Thread object with given data
 //----------------------------------------------------------------------
if (concrete_frame_idx == 0)
         RegisterInfoInterface *reg_interface = NULL;
 
         switch (arch.GetTriple().getOS())
         {
             case llvm::Triple::FreeBSD:
             {
                 switch (arch.GetMachine())
                 {
+                    case llvm::Triple::ppc:
+                        reg_interface = new RegisterContextFreeBSD_powerpc32(arch);
+                        break;
+                    case llvm::Triple::ppc64:
+                        reg_interface = new RegisterContextFreeBSD_powerpc64(arch);
+                        break;
                     case llvm::Triple::mips64:
                         reg_interface = new RegisterContextFreeBSD_mips64(arch);
                         break;
                     case llvm::Triple::x86:
                         reg_interface = new RegisterContextFreeBSD_i386(arch);
                         break;
                     case llvm::Triple::x86_64:
                         reg_interface = new RegisterContextFreeBSD_x86_64(arch);
if (concrete_frame_idx == 0)
                 assert (false && "Architecture or OS not supported");
         }
 
         switch (arch.GetMachine())
         {
             case llvm::Triple::mips64:
                 m_thread_reg_ctx_sp.reset(new RegisterContextCorePOSIX_mips64 (*this, reg_interface, m_gpregset_data, m_fpregset_data));
                 break;
+            case llvm::Triple::ppc:
+            case llvm::Triple::ppc64:
+                m_thread_reg_ctx_sp.reset(new RegisterContextCorePOSIX_powerpc (*this, reg_interface, m_gpregset_data, m_fpregset_data));
+                break;
             case llvm::Triple::x86:
             case llvm::Triple::x86_64:
                 m_thread_reg_ctx_sp.reset(new RegisterContextCorePOSIX_x86_64 (*this, reg_interface, m_gpregset_data, m_fpregset_data));
                 break;
             default:
                 break;
         }
 

source/Target/Thread.cpp

if (m_unwinder_ap.get() == NULL)
         switch (machine)
         {
             case llvm::Triple::x86_64:
             case llvm::Triple::x86:
             case llvm::Triple::arm:
             case llvm::Triple::aarch64:
             case llvm::Triple::thumb:
             case llvm::Triple::mips64:
+            case llvm::Triple::ppc64:
+            case llvm::Triple::ppc:
             case llvm::Triple::hexagon:
                 m_unwinder_ap.reset (new UnwindLLDB (*this));
                 break;
                 
             default:
                 if (target_arch.GetTriple().getVendor() == llvm::Triple::Apple)
                     m_unwinder_ap.reset (new UnwindMacOSXFrameBackchain (*this));
                 break;

source/lldb.cpp

 
 #include "llvm/ADT/StringRef.h"
 #include "llvm/Support/TargetSelect.h"
 
 #include "Plugins/ABI/MacOSX-i386/ABIMacOSX_i386.h"
 #include "Plugins/ABI/MacOSX-arm/ABIMacOSX_arm.h"
 #include "Plugins/ABI/MacOSX-arm64/ABIMacOSX_arm64.h"
 #include "Plugins/ABI/SysV-x86_64/ABISysV_x86_64.h"
+#include "Plugins/ABI/SysV-ppc/ABISysV_ppc.h"
+#include "Plugins/ABI/SysV-ppc64/ABISysV_ppc64.h"
 #include "Plugins/Disassembler/llvm/DisassemblerLLVMC.h"
 #include "Plugins/DynamicLoader/POSIX-DYLD/DynamicLoaderPOSIXDYLD.h"
 #include "Plugins/Instruction/ARM/EmulateInstructionARM.h"
 #include "Plugins/Instruction/ARM64/EmulateInstructionARM64.h"
 #include "Plugins/SymbolVendor/MacOSX/SymbolVendorMacOSX.h"
 #include "Plugins/JITLoader/GDB/JITLoaderGDB.h"
 #include "Plugins/LanguageRuntime/CPlusPlus/ItaniumABI/ItaniumABILanguageRuntime.h"
 #include "Plugins/ObjectContainer/BSD-Archive/ObjectContainerBSDArchive.h"
if (!g_inited)
         llvm::InitializeAllDisassemblers();
         llvm::install_fatal_error_handler(fatal_error_handler, 0);
 
         // Initialize plug-ins
         ABIMacOSX_i386::Initialize();
         ABIMacOSX_arm::Initialize();
         ABIMacOSX_arm64::Initialize();
         ABISysV_x86_64::Initialize();
+        ABISysV_ppc::Initialize();
+        ABISysV_ppc64::Initialize();
         DisassemblerLLVMC::Initialize();
         ObjectContainerBSDArchive::Initialize();
         ObjectFileELF::Initialize();
         SymbolVendorELF::Initialize();
         SymbolFileDWARF::Initialize();
         SymbolFileSymtab::Initialize();
         UnwindAssemblyInstEmulation::Initialize();
         UnwindAssembly_x86::Initialize();
lldb_private::Terminate ()
     Timer scoped_timer (__PRETTY_FUNCTION__, __PRETTY_FUNCTION__);
     
     // Terminate and unload and loaded system or user LLDB plug-ins
     PluginManager::Terminate();
     ABIMacOSX_i386::Terminate();
     ABIMacOSX_arm::Terminate();
     ABIMacOSX_arm64::Terminate();
     ABISysV_x86_64::Terminate();
+    ABISysV_ppc64::Terminate();
     DisassemblerLLVMC::Terminate();
     ObjectContainerBSDArchive::Terminate();
     ObjectFileELF::Terminate();
     SymbolVendorELF::Terminate();
     SymbolFileDWARF::Terminate();
     SymbolFileSymtab::Terminate();
     UnwindAssembly_x86::Terminate();
     UnwindAssemblyInstEmulation::Terminate();