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
|
/* -------------------------------------------
Copyright ZKA Technologies
------------------------------------------- */
#include <BootKit/ProgramLoader.hxx>
#include <BootKit/Support.hxx>
#include <BootKit/BootKit.hxx>
#include <KernelKit/PEF.hxx>
#include <KernelKit/PE.hxx>
#include <KernelKit/MSDOS.hxx>
#include <CFKit/LoaderUtils.hxx>
EXTERN_C
{
#include <string.h>
}
extern EfiBootServices* BS;
namespace Boot
{
EXTERN_C Int32 rt_jump_to_address(HEL::HandoverProc baseCode, HEL::HandoverInformationHeader* handover, Char* stackPointer);
ProgramLoader::ProgramLoader(VoidPtr blob)
: fBlob(blob), fStartAddress(nullptr)
{
// detect the format.
const Char* firstBytes = reinterpret_cast<char*>(fBlob);
BTextWriter writer;
if (!firstBytes)
{
// failed to provide a valid pointer.
return;
}
if (firstBytes[0] == kMagMz0 &&
firstBytes[1] == kMagMz1)
{
writer.Write("newosldr: PE32+ executable detected.\r");
ExecHeaderPtr hdrPtr = ldr_find_exec_header(firstBytes);
ExecOptionalHeaderPtr optHdr = ldr_find_opt_exec_header(firstBytes);
auto numSecs = hdrPtr->mNumberOfSections;
writer.Write("newosldr: Major Linker Ver: ").Write(optHdr->mMajorLinkerVersion).Write("\r");
writer.Write("newosldr: Minor Linker Ver: ").Write(optHdr->mMinorLinkerVersion).Write("\r");
writer.Write("newosldr: Major Subsystem Ver: ").Write(optHdr->mMajorSubsystemVersion).Write("\r");
writer.Write("newosldr: Minor Subsystem Ver: ").Write(optHdr->mMinorSubsystemVersion).Write("\r");
writer.Write("newosldr: Magic: ").Write(hdrPtr->mSignature).Write("\r");
constexpr auto cPageSize = 512;
EfiPhysicalAddress loadStartAddress = optHdr->mImageBase;
loadStartAddress += optHdr->mBaseOfData;
writer.Write("newosldr: ImageBase: ").Write(loadStartAddress).Write("\r");
auto numPages = optHdr->mSizeOfImage / cPageSize;
BS->AllocatePages(AllocateAddress, EfiLoaderData, numPages, &loadStartAddress);
ExecSectionHeaderPtr sectPtr = (ExecSectionHeaderPtr)(((Char*)optHdr) + hdrPtr->mSizeOfOptionalHeader);
constexpr auto sectionForCode = ".start";
for (SizeT sectIndex = 0; sectIndex < numSecs; ++sectIndex)
{
ExecSectionHeaderPtr sect = §Ptr[sectIndex];
if (StrCmp(sectionForCode, sect->mName) == 0)
{
fStartAddress = (VoidPtr)((UIntPtr)loadStartAddress + sect->mVirtualAddress);
writer.Write("newosldr: Start Address: ").Write((UIntPtr)fStartAddress).Write("\r");
}
writer.Write("newosldr: offset ").Write(sect->mPointerToRawData).Write(" of ").Write(sect->mName).Write(".\r");
SetMem((VoidPtr)(loadStartAddress + sect->mVirtualAddress), 0, sect->mSizeOfRawData);
CopyMem((VoidPtr)(loadStartAddress + sect->mVirtualAddress), (VoidPtr)((UIntPtr)fBlob + sect->mPointerToRawData), sect->mSizeOfRawData);
}
// ================================ //
// Allocate stack.
// ================================ //
fStackPtr = new Char[optHdr->mSizeOfStackReserve];
}
else if (firstBytes[0] == kPefMagic[0] &&
firstBytes[1] == kPefMagic[1] &&
firstBytes[2] == kPefMagic[2] &&
firstBytes[3] == kPefMagic[3])
{
// ========================================= //
// PEF executable detected.
// ========================================= //
fStartAddress = nullptr;
writer.Write("newosldr: PEF executable detected.\r");
}
else
{
writer.Write("newosldr: Invalid executable.\r");
}
}
/// @note handover header has to be valid!
Void ProgramLoader::Start(HEL::HandoverInformationHeader* handover)
{
BTextWriter writer;
if (!handover)
{
writer.Write("newosldr: Exec format error.\r");
return;
}
HEL::HandoverProc err_fn = [](HEL::HandoverInformationHeader* rcx) -> void {
BTextWriter writer;
writer.Write("newosldr: Exec format error, Thread has been aborted.\r");
EFI::ThrowError(L"Exec-Format-Error", L"Format doesn't match (Thread aborted).");
};
if (!fStartAddress)
{
err_fn(handover);
}
reinterpret_cast<HEL::HandoverProc>(fStartAddress)(handover);
err_fn(handover);
}
const Char* ProgramLoader::GetName()
{
return fBlobName;
}
Void ProgramLoader::SetName(const Char* name)
{
CopyMem(fBlobName, name, StrLen(name));
}
bool ProgramLoader::IsValid()
{
return fStartAddress != nullptr;
}
} // namespace Boot
|
