]> CyberLeo.Net >> Repos - FreeBSD/releng/10.2.git/blob - contrib/llvm/tools/lldb/source/Plugins/DynamicLoader/POSIX-DYLD/AuxVector.cpp
- Copy stable/10@285827 to releng/10.2 in preparation for 10.2-RC1
[FreeBSD/releng/10.2.git] / contrib / llvm / tools / lldb / source / Plugins / DynamicLoader / POSIX-DYLD / AuxVector.cpp
1 //===-- AuxVector.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 // C Includes
11 #include <fcntl.h>
12 #include <sys/stat.h>
13 #include <sys/types.h>
14
15 // C++ Includes
16 // Other libraries and framework includes
17 #include "lldb/Core/DataBufferHeap.h"
18 #include "lldb/Core/DataExtractor.h"
19 #include "lldb/Core/Log.h"
20 #include "lldb/Target/Process.h"
21
22 #if defined(__linux__) || defined(__FreeBSD__)
23 #include "Plugins/Process/elf-core/ProcessElfCore.h"
24 #endif
25
26 #include "AuxVector.h"
27
28 using namespace lldb;
29 using namespace lldb_private;
30
31 static bool
32 GetMaxU64(DataExtractor &data,
33           lldb::offset_t *offset_ptr,
34           uint64_t *value,
35           unsigned int byte_size)
36 {
37     lldb::offset_t saved_offset = *offset_ptr;
38     *value = data.GetMaxU64(offset_ptr, byte_size);
39     return *offset_ptr != saved_offset;
40 }
41
42 static bool
43 ParseAuxvEntry(DataExtractor &data,
44                AuxVector::Entry &entry,
45                lldb::offset_t *offset_ptr,
46                unsigned int byte_size)
47 {
48     if (!GetMaxU64(data, offset_ptr, &entry.type, byte_size))
49         return false;
50
51     if (!GetMaxU64(data, offset_ptr, &entry.value, byte_size))
52         return false;
53
54     return true;
55 }
56
57 DataBufferSP
58 AuxVector::GetAuxvData()
59 {
60 #if defined(__linux__) || defined(__FreeBSD__)
61     if (m_process->GetPluginName() == ProcessElfCore::GetPluginNameStatic())
62         return static_cast<ProcessElfCore *>(m_process)->GetAuxvData();
63 #endif
64     return lldb_private::Host::GetAuxvData(m_process);
65 }
66
67 void
68 AuxVector::ParseAuxv(DataExtractor &data)
69 {
70     const unsigned int byte_size  = m_process->GetAddressByteSize();
71     lldb::offset_t offset = 0;
72
73     for (;;) 
74     {
75         Entry entry;
76
77         if (!ParseAuxvEntry(data, entry, &offset, byte_size))
78             break;
79
80         if (entry.type == AT_NULL)
81             break;
82
83         if (entry.type == AT_IGNORE)
84             continue;
85
86         m_auxv.push_back(entry);
87     }
88 }
89
90 AuxVector::AuxVector(Process *process)
91     : m_process(process)
92 {
93     DataExtractor data;
94     Log *log(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_DYNAMIC_LOADER));
95
96     data.SetData(GetAuxvData());
97     data.SetByteOrder(m_process->GetByteOrder());
98     data.SetAddressByteSize(m_process->GetAddressByteSize());
99     
100     ParseAuxv(data);
101
102     if (log)
103         DumpToLog(log);
104 }
105
106 AuxVector::iterator 
107 AuxVector::FindEntry(EntryType type) const
108 {
109     for (iterator I = begin(); I != end(); ++I)
110     {
111         if (I->type == static_cast<uint64_t>(type))
112             return I;
113     }
114
115     return end();
116 }
117
118 void
119 AuxVector::DumpToLog(Log *log) const
120 {
121     if (!log)
122         return;
123
124     log->PutCString("AuxVector: ");
125     for (iterator I = begin(); I != end(); ++I)
126     {
127         log->Printf("   %s [%" PRIu64 "]: %" PRIx64, GetEntryName(*I), I->type, I->value);
128     }
129 }
130
131 const char *
132 AuxVector::GetEntryName(EntryType type)
133 {
134     const char *name = "AT_???";
135
136 #define ENTRY_NAME(_type) _type: name = #_type
137     switch (type) 
138     {
139     case ENTRY_NAME(AT_NULL);           break;
140     case ENTRY_NAME(AT_IGNORE);         break;
141     case ENTRY_NAME(AT_EXECFD);         break;
142     case ENTRY_NAME(AT_PHDR);           break;
143     case ENTRY_NAME(AT_PHENT);          break;
144     case ENTRY_NAME(AT_PHNUM);          break;
145     case ENTRY_NAME(AT_PAGESZ);         break;
146     case ENTRY_NAME(AT_BASE);           break;
147     case ENTRY_NAME(AT_FLAGS);          break;
148     case ENTRY_NAME(AT_ENTRY);          break;
149     case ENTRY_NAME(AT_NOTELF);         break;
150     case ENTRY_NAME(AT_UID);            break;
151     case ENTRY_NAME(AT_EUID);           break;
152     case ENTRY_NAME(AT_GID);            break;
153     case ENTRY_NAME(AT_EGID);           break;
154     case ENTRY_NAME(AT_CLKTCK);         break;
155     case ENTRY_NAME(AT_PLATFORM);       break;
156     case ENTRY_NAME(AT_HWCAP);          break;
157     case ENTRY_NAME(AT_FPUCW);          break;
158     case ENTRY_NAME(AT_DCACHEBSIZE);    break;
159     case ENTRY_NAME(AT_ICACHEBSIZE);    break;
160     case ENTRY_NAME(AT_UCACHEBSIZE);    break;
161     case ENTRY_NAME(AT_IGNOREPPC);      break;
162     case ENTRY_NAME(AT_SECURE);         break;
163     case ENTRY_NAME(AT_BASE_PLATFORM);  break;
164     case ENTRY_NAME(AT_RANDOM);         break;
165     case ENTRY_NAME(AT_EXECFN);         break;
166     case ENTRY_NAME(AT_SYSINFO);        break;
167     case ENTRY_NAME(AT_SYSINFO_EHDR);   break;
168     case ENTRY_NAME(AT_L1I_CACHESHAPE); break;
169     case ENTRY_NAME(AT_L1D_CACHESHAPE); break;
170     case ENTRY_NAME(AT_L2_CACHESHAPE);  break;
171     case ENTRY_NAME(AT_L3_CACHESHAPE);  break;
172     }
173 #undef ENTRY_NAME
174
175     return name;
176 }
177