1 //===-- ArchitecturePPC64.cpp -----------------------------------*- C++ -*-===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #include "Plugins/Architecture/PPC64/ArchitecturePPC64.h"
11 #include "lldb/Core/PluginManager.h"
12 #include "lldb/Symbol/Function.h"
13 #include "lldb/Symbol/Symbol.h"
14 #include "lldb/Target/RegisterContext.h"
15 #include "lldb/Target/Target.h"
16 #include "lldb/Target/Thread.h"
17 #include "lldb/Utility/ArchSpec.h"
18 
19 #include "llvm/BinaryFormat/ELF.h"
20 
21 using namespace lldb_private;
22 using namespace lldb;
23 
GetPluginNameStatic()24 ConstString ArchitecturePPC64::GetPluginNameStatic() {
25   return ConstString("ppc64");
26 }
27 
Initialize()28 void ArchitecturePPC64::Initialize() {
29   PluginManager::RegisterPlugin(GetPluginNameStatic(),
30                                 "PPC64-specific algorithms",
31                                 &ArchitecturePPC64::Create);
32 }
33 
Terminate()34 void ArchitecturePPC64::Terminate() {
35   PluginManager::UnregisterPlugin(&ArchitecturePPC64::Create);
36 }
37 
Create(const ArchSpec & arch)38 std::unique_ptr<Architecture> ArchitecturePPC64::Create(const ArchSpec &arch) {
39   if ((arch.GetMachine() != llvm::Triple::ppc64 &&
40        arch.GetMachine() != llvm::Triple::ppc64le) ||
41       arch.GetTriple().getObjectFormat() != llvm::Triple::ObjectFormatType::ELF)
42     return nullptr;
43   return std::unique_ptr<Architecture>(new ArchitecturePPC64());
44 }
45 
GetPluginName()46 ConstString ArchitecturePPC64::GetPluginName() { return GetPluginNameStatic(); }
GetPluginVersion()47 uint32_t ArchitecturePPC64::GetPluginVersion() { return 1; }
48 
GetLocalEntryOffset(const Symbol & sym)49 static int32_t GetLocalEntryOffset(const Symbol &sym) {
50   unsigned char other = sym.GetFlags() >> 8 & 0xFF;
51   return llvm::ELF::decodePPC64LocalEntryOffset(other);
52 }
53 
GetBytesToSkip(Symbol & func,const Address & curr_addr) const54 size_t ArchitecturePPC64::GetBytesToSkip(Symbol &func,
55                                          const Address &curr_addr) const {
56   if (curr_addr.GetFileAddress() ==
57       func.GetFileAddress() + GetLocalEntryOffset(func))
58     return func.GetPrologueByteSize();
59   return 0;
60 }
61 
AdjustBreakpointAddress(const Symbol & func,Address & addr) const62 void ArchitecturePPC64::AdjustBreakpointAddress(const Symbol &func,
63                                                 Address &addr) const {
64   int32_t loffs = GetLocalEntryOffset(func);
65   if (!loffs)
66     return;
67 
68   addr.SetOffset(addr.GetOffset() + loffs);
69 }
70