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
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
|
//===- MachOUniversal.cpp - Mach-O universal binary -------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines the MachOUniversalBinary class.
//
//===----------------------------------------------------------------------===//
#include "llvm/Object/MachOUniversal.h"
#include "llvm/Object/MachO.h"
#include "llvm/Object/ObjectFile.h"
#include "llvm/Object/Archive.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/Host.h"
#include "llvm/Support/MemoryBuffer.h"
using namespace llvm;
using namespace object;
template<typename T>
static void SwapStruct(T &Value);
template<>
void SwapStruct(MachO::fat_header &H) {
sys::swapByteOrder(H.magic);
sys::swapByteOrder(H.nfat_arch);
}
template<>
void SwapStruct(MachO::fat_arch &H) {
sys::swapByteOrder(H.cputype);
sys::swapByteOrder(H.cpusubtype);
sys::swapByteOrder(H.offset);
sys::swapByteOrder(H.size);
sys::swapByteOrder(H.align);
}
template<typename T>
static T getUniversalBinaryStruct(const char *Ptr) {
T Res;
memcpy(&Res, Ptr, sizeof(T));
// Universal binary headers have big-endian byte order.
if (sys::IsLittleEndianHost)
SwapStruct(Res);
return Res;
}
MachOUniversalBinary::ObjectForArch::ObjectForArch(
const MachOUniversalBinary *Parent, uint32_t Index)
: Parent(Parent), Index(Index) {
if (!Parent || Index >= Parent->getNumberOfObjects()) {
clear();
} else {
// Parse object header.
StringRef ParentData = Parent->getData();
const char *HeaderPos = ParentData.begin() + sizeof(MachO::fat_header) +
Index * sizeof(MachO::fat_arch);
Header = getUniversalBinaryStruct<MachO::fat_arch>(HeaderPos);
if (ParentData.size() < Header.offset + Header.size) {
clear();
}
}
}
ErrorOr<std::unique_ptr<MachOObjectFile>>
MachOUniversalBinary::ObjectForArch::getAsObjectFile() const {
if (Parent) {
StringRef ParentData = Parent->getData();
StringRef ObjectData = ParentData.substr(Header.offset, Header.size);
StringRef ObjectName = Parent->getFileName();
MemoryBufferRef ObjBuffer(ObjectData, ObjectName);
return ObjectFile::createMachOObjectFile(ObjBuffer);
}
return object_error::parse_failed;
}
std::error_code MachOUniversalBinary::ObjectForArch::getAsArchive(
std::unique_ptr<Archive> &Result) const {
if (Parent) {
StringRef ParentData = Parent->getData();
StringRef ObjectData = ParentData.substr(Header.offset, Header.size);
StringRef ObjectName = Parent->getFileName();
MemoryBufferRef ObjBuffer(ObjectData, ObjectName);
ErrorOr<std::unique_ptr<Archive>> Obj = Archive::create(ObjBuffer);
if (std::error_code EC = Obj.getError())
return EC;
Result = std::move(Obj.get());
return object_error::success;
}
return object_error::parse_failed;
}
void MachOUniversalBinary::anchor() { }
ErrorOr<std::unique_ptr<MachOUniversalBinary>>
MachOUniversalBinary::create(MemoryBufferRef Source) {
std::error_code EC;
std::unique_ptr<MachOUniversalBinary> Ret(
new MachOUniversalBinary(Source, EC));
if (EC)
return EC;
return std::move(Ret);
}
MachOUniversalBinary::MachOUniversalBinary(MemoryBufferRef Source,
std::error_code &ec)
: Binary(Binary::ID_MachOUniversalBinary, Source), NumberOfObjects(0) {
if (Data.getBufferSize() < sizeof(MachO::fat_header)) {
ec = object_error::invalid_file_type;
return;
}
// Check for magic value and sufficient header size.
StringRef Buf = getData();
MachO::fat_header H= getUniversalBinaryStruct<MachO::fat_header>(Buf.begin());
NumberOfObjects = H.nfat_arch;
uint32_t MinSize = sizeof(MachO::fat_header) +
sizeof(MachO::fat_arch) * NumberOfObjects;
if (H.magic != MachO::FAT_MAGIC || Buf.size() < MinSize) {
ec = object_error::parse_failed;
return;
}
ec = object_error::success;
}
static bool getCTMForArch(Triple::ArchType Arch, MachO::CPUType &CTM) {
switch (Arch) {
case Triple::x86: CTM = MachO::CPU_TYPE_I386; return true;
case Triple::x86_64: CTM = MachO::CPU_TYPE_X86_64; return true;
case Triple::arm: CTM = MachO::CPU_TYPE_ARM; return true;
case Triple::sparc: CTM = MachO::CPU_TYPE_SPARC; return true;
case Triple::ppc: CTM = MachO::CPU_TYPE_POWERPC; return true;
case Triple::ppc64: CTM = MachO::CPU_TYPE_POWERPC64; return true;
default: return false;
}
}
ErrorOr<std::unique_ptr<MachOObjectFile>>
MachOUniversalBinary::getObjectForArch(Triple::ArchType Arch) const {
MachO::CPUType CTM;
if (!getCTMForArch(Arch, CTM))
return object_error::arch_not_found;
for (object_iterator I = begin_objects(), E = end_objects(); I != E; ++I) {
if (I->getCPUType() == static_cast<uint32_t>(CTM))
return I->getAsObjectFile();
}
return object_error::arch_not_found;
}
|
