1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
|
//===-- AuxVector.h ---------------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef liblldb_AuxVector_H_
#define liblldb_AuxVector_H_
#include <vector>
#include "lldb/lldb-forward.h"
namespace lldb_private {
class DataExtractor;
}
/// @class AuxVector
/// Represents a processes auxiliary vector.
///
/// When a process is loaded on Linux a vector of values is placed onto the
/// stack communicating operating system specific information. On
/// construction this class locates and parses this information and provides a
/// simple read-only interface to the entries found.
class AuxVector {
public:
AuxVector(lldb_private::Process *process);
struct Entry {
uint64_t type;
uint64_t value;
Entry() : type(0), value(0) {}
};
/// Constants describing the type of entry.
/// On Linux, running "LD_SHOW_AUXV=1 ./executable" will spew AUX
/// information. Added AUXV prefix to avoid potential conflicts with system-
/// defined macros
enum EntryType {
AUXV_AT_NULL = 0, ///< End of auxv.
AUXV_AT_IGNORE = 1, ///< Ignore entry.
AUXV_AT_EXECFD = 2, ///< File descriptor of program.
AUXV_AT_PHDR = 3, ///< Program headers.
AUXV_AT_PHENT = 4, ///< Size of program header.
AUXV_AT_PHNUM = 5, ///< Number of program headers.
AUXV_AT_PAGESZ = 6, ///< Page size.
AUXV_AT_BASE = 7, ///< Interpreter base address.
AUXV_AT_FLAGS = 8, ///< Flags.
AUXV_AT_ENTRY = 9, ///< Program entry point.
AUXV_AT_NOTELF = 10, ///< Set if program is not an ELF.
AUXV_AT_UID = 11, ///< UID.
AUXV_AT_EUID = 12, ///< Effective UID.
AUXV_AT_GID = 13, ///< GID.
AUXV_AT_EGID = 14, ///< Effective GID.
AUXV_AT_CLKTCK = 17, ///< Clock frequency (e.g. times(2)).
AUXV_AT_PLATFORM = 15, ///< String identifying platform.
AUXV_AT_HWCAP = 16, ///< Machine dependent hints about processor capabilities.
AUXV_AT_FPUCW = 18, ///< Used FPU control word.
AUXV_AT_DCACHEBSIZE = 19, ///< Data cache block size.
AUXV_AT_ICACHEBSIZE = 20, ///< Instruction cache block size.
AUXV_AT_UCACHEBSIZE = 21, ///< Unified cache block size.
AUXV_AT_IGNOREPPC = 22, ///< Entry should be ignored.
AUXV_AT_SECURE = 23, ///< Boolean, was exec setuid-like?
AUXV_AT_BASE_PLATFORM = 24, ///< String identifying real platforms.
AUXV_AT_RANDOM = 25, ///< Address of 16 random bytes.
AUXV_AT_EXECFN = 31, ///< Filename of executable.
AUXV_AT_SYSINFO = 32, ///< Pointer to the global system page used for system
///calls and other nice things.
AUXV_AT_SYSINFO_EHDR = 33,
AUXV_AT_L1I_CACHESHAPE = 34, ///< Shapes of the caches.
AUXV_AT_L1D_CACHESHAPE = 35,
AUXV_AT_L2_CACHESHAPE = 36,
AUXV_AT_L3_CACHESHAPE = 37,
};
private:
typedef std::vector<Entry> EntryVector;
public:
typedef EntryVector::const_iterator iterator;
iterator begin() const { return m_auxv.begin(); }
iterator end() const { return m_auxv.end(); }
iterator FindEntry(EntryType type) const;
static const char *GetEntryName(const Entry &entry) {
return GetEntryName(static_cast<EntryType>(entry.type));
}
static const char *GetEntryName(EntryType type);
void DumpToLog(lldb_private::Log *log) const;
private:
lldb_private::Process *m_process;
EntryVector m_auxv;
lldb::DataBufferSP GetAuxvData();
void ParseAuxv(lldb_private::DataExtractor &data);
};
#endif
|
