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wintun: remove memmod option for dll loading

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Only wireguard-windows used this, and it's moving to wgnt exclusively.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
This commit is contained in:
Jason A. Donenfeld 2021-10-16 22:49:38 -06:00
parent dfd688b6aa
commit ba9e364dab
13 changed files with 39 additions and 1481 deletions
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54
tun/wintun/dll_fromfile_windows.go
View file

@ -1,54 +0,0 @@
//go:build !load_wintun_from_rsrc
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2019 WireGuard LLC. All Rights Reserved.
*/
package wintun
import (
"fmt"
"sync"
"sync/atomic"
"unsafe"
"golang.org/x/sys/windows"
)
type lazyDLL struct {
Name string
mu sync.Mutex
module windows.Handle
onLoad func(d *lazyDLL)
}
func (d *lazyDLL) Load() error {
if atomic.LoadPointer((*unsafe.Pointer)(unsafe.Pointer(&d.module))) != nil {
return nil
}
d.mu.Lock()
defer d.mu.Unlock()
if d.module != 0 {
return nil
}
const (
LOAD_LIBRARY_SEARCH_APPLICATION_DIR = 0x00000200
LOAD_LIBRARY_SEARCH_SYSTEM32 = 0x00000800
)
module, err := windows.LoadLibraryEx(d.Name, 0, LOAD_LIBRARY_SEARCH_APPLICATION_DIR|LOAD_LIBRARY_SEARCH_SYSTEM32)
if err != nil {
return fmt.Errorf("Unable to load library: %w", err)
}
atomic.StorePointer((*unsafe.Pointer)(unsafe.Pointer(&d.module)), unsafe.Pointer(module))
if d.onLoad != nil {
d.onLoad(d)
}
return nil
}
func (p *lazyProc) nameToAddr() (uintptr, error) {
return windows.GetProcAddress(p.dll.module, p.Name)
}

61
tun/wintun/dll_fromrsrc_windows.go
View file

@ -1,61 +0,0 @@
//go:build load_wintun_from_rsrc
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2019 WireGuard LLC. All Rights Reserved.
*/
package wintun
import (
"fmt"
"sync"
"sync/atomic"
"unsafe"
"golang.org/x/sys/windows"
"golang.zx2c4.com/wireguard/tun/wintun/memmod"
)
type lazyDLL struct {
Name string
mu sync.Mutex
module *memmod.Module
onLoad func(d *lazyDLL)
}
func (d *lazyDLL) Load() error {
if atomic.LoadPointer((*unsafe.Pointer)(unsafe.Pointer(&d.module))) != nil {
return nil
}
d.mu.Lock()
defer d.mu.Unlock()
if d.module != nil {
return nil
}
const ourModule windows.Handle = 0
resInfo, err := windows.FindResource(ourModule, d.Name, windows.RT_RCDATA)
if err != nil {
return fmt.Errorf("Unable to find \"%v\" RCDATA resource: %w", d.Name, err)
}
data, err := windows.LoadResourceData(ourModule, resInfo)
if err != nil {
return fmt.Errorf("Unable to load resource: %w", err)
}
module, err := memmod.LoadLibrary(data)
if err != nil {
return fmt.Errorf("Unable to load library: %w", err)
}
atomic.StorePointer((*unsafe.Pointer)(unsafe.Pointer(&d.module)), unsafe.Pointer(module))
if d.onLoad != nil {
d.onLoad(d)
}
return nil
}
func (p *lazyProc) nameToAddr() (uintptr, error) {
return p.dll.module.ProcAddressByName(p.Name)
}

39
tun/wintun/dll_windows.go
View file

@ -10,6 +10,8 @@ import (
"sync"
"sync/atomic"
"unsafe"
"golang.org/x/sys/windows"
)
func newLazyDLL(name string, onLoad func(d *lazyDLL)) *lazyDLL {
@ -57,3 +59,40 @@ func (p *lazyProc) Addr() uintptr {
}
return p.addr
}
type lazyDLL struct {
Name string
mu sync.Mutex
module windows.Handle
onLoad func(d *lazyDLL)
}
func (d *lazyDLL) Load() error {
if atomic.LoadPointer((*unsafe.Pointer)(unsafe.Pointer(&d.module))) != nil {
return nil
}
d.mu.Lock()
defer d.mu.Unlock()
if d.module != 0 {
return nil
}
const (
LOAD_LIBRARY_SEARCH_APPLICATION_DIR = 0x00000200
LOAD_LIBRARY_SEARCH_SYSTEM32 = 0x00000800
)
module, err := windows.LoadLibraryEx(d.Name, 0, LOAD_LIBRARY_SEARCH_APPLICATION_DIR|LOAD_LIBRARY_SEARCH_SYSTEM32)
if err != nil {
return fmt.Errorf("Unable to load library: %w", err)
}
atomic.StorePointer((*unsafe.Pointer)(unsafe.Pointer(&d.module)), unsafe.Pointer(module))
if d.onLoad != nil {
d.onLoad(d)
}
return nil
}
func (p *lazyProc) nameToAddr() (uintptr, error) {
return windows.GetProcAddress(p.dll.module, p.Name)
}

693
tun/wintun/memmod/memmod_windows.go
View file

@ -1,693 +0,0 @@
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
*/
package memmod
import (
"errors"
"fmt"
"strings"
"sync"
"syscall"
"unsafe"
"golang.org/x/sys/windows"
)
type addressList struct {
next *addressList
address uintptr
}
func (head *addressList) free() {
for node := head; node != nil; node = node.next {
windows.VirtualFree(node.address, 0, windows.MEM_RELEASE)
}
}
type Module struct {
headers *IMAGE_NT_HEADERS
codeBase uintptr
modules []windows.Handle
initialized bool
isDLL bool
isRelocated bool
nameExports map[string]uint16
entry uintptr
blockedMemory *addressList
}
func (module *Module) headerDirectory(idx int) *IMAGE_DATA_DIRECTORY {
return &module.headers.OptionalHeader.DataDirectory[idx]
}
func (module *Module) copySections(address uintptr, size uintptr, oldHeaders *IMAGE_NT_HEADERS) error {
sections := module.headers.Sections()
for i := range sections {
if sections[i].SizeOfRawData == 0 {
// Section doesn't contain data in the dll itself, but may define uninitialized data.
sectionSize := oldHeaders.OptionalHeader.SectionAlignment
if sectionSize == 0 {
continue
}
dest, err := windows.VirtualAlloc(module.codeBase+uintptr(sections[i].VirtualAddress),
uintptr(sectionSize),
windows.MEM_COMMIT,
windows.PAGE_READWRITE)
if err != nil {
return fmt.Errorf("Error allocating section: %w", err)
}
// Always use position from file to support alignments smaller than page size (allocation above will align to page size).
dest = module.codeBase + uintptr(sections[i].VirtualAddress)
// NOTE: On 64bit systems we truncate to 32bit here but expand again later when "PhysicalAddress" is used.
sections[i].SetPhysicalAddress((uint32)(dest & 0xffffffff))
dst := unsafe.Slice((*byte)(a2p(dest)), sectionSize)
for j := range dst {
dst[j] = 0
}
continue
}
if size < uintptr(sections[i].PointerToRawData+sections[i].SizeOfRawData) {
return errors.New("Incomplete section")
}
// Commit memory block and copy data from dll.
dest, err := windows.VirtualAlloc(module.codeBase+uintptr(sections[i].VirtualAddress),
uintptr(sections[i].SizeOfRawData),
windows.MEM_COMMIT,
windows.PAGE_READWRITE)
if err != nil {
return fmt.Errorf("Error allocating memory block: %w", err)
}
// Always use position from file to support alignments smaller than page size (allocation above will align to page size).
memcpy(
module.codeBase+uintptr(sections[i].VirtualAddress),
address+uintptr(sections[i].PointerToRawData),
uintptr(sections[i].SizeOfRawData))
// NOTE: On 64bit systems we truncate to 32bit here but expand again later when "PhysicalAddress" is used.
sections[i].SetPhysicalAddress((uint32)(dest & 0xffffffff))
}
return nil
}
func (module *Module) realSectionSize(section *IMAGE_SECTION_HEADER) uintptr {
size := section.SizeOfRawData
if size != 0 {
return uintptr(size)
}
if (section.Characteristics & IMAGE_SCN_CNT_INITIALIZED_DATA) != 0 {
return uintptr(module.headers.OptionalHeader.SizeOfInitializedData)
}
if (section.Characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA) != 0 {
return uintptr(module.headers.OptionalHeader.SizeOfUninitializedData)
}
return 0
}
type sectionFinalizeData struct {
address uintptr
alignedAddress uintptr
size uintptr
characteristics uint32
last bool
}
func (module *Module) finalizeSection(sectionData *sectionFinalizeData) error {
if sectionData.size == 0 {
return nil
}
if (sectionData.characteristics & IMAGE_SCN_MEM_DISCARDABLE) != 0 {
// Section is not needed any more and can safely be freed.
if sectionData.address == sectionData.alignedAddress &&
(sectionData.last ||
(sectionData.size%uintptr(module.headers.OptionalHeader.SectionAlignment)) == 0) {
// Only allowed to decommit whole pages.
windows.VirtualFree(sectionData.address, sectionData.size, windows.MEM_DECOMMIT)
}
return nil
}
// determine protection flags based on characteristics
var ProtectionFlags = [8]uint32{
windows.PAGE_NOACCESS, // not writeable, not readable, not executable
windows.PAGE_EXECUTE, // not writeable, not readable, executable
windows.PAGE_READONLY, // not writeable, readable, not executable
windows.PAGE_EXECUTE_READ, // not writeable, readable, executable
windows.PAGE_WRITECOPY, // writeable, not readable, not executable
windows.PAGE_EXECUTE_WRITECOPY, // writeable, not readable, executable
windows.PAGE_READWRITE, // writeable, readable, not executable
windows.PAGE_EXECUTE_READWRITE, // writeable, readable, executable
}
protect := ProtectionFlags[sectionData.characteristics>>29]
if (sectionData.characteristics & IMAGE_SCN_MEM_NOT_CACHED) != 0 {
protect |= windows.PAGE_NOCACHE
}
// Change memory access flags.
var oldProtect uint32
err := windows.VirtualProtect(sectionData.address, sectionData.size, protect, &oldProtect)
if err != nil {
return fmt.Errorf("Error protecting memory page: %w", err)
}
return nil
}
var rtlAddFunctionTable = windows.NewLazySystemDLL("ntdll.dll").NewProc("RtlAddFunctionTable")
func (module *Module) registerExceptionHandlers() {
directory := module.headerDirectory(IMAGE_DIRECTORY_ENTRY_EXCEPTION)
if directory.Size == 0 || directory.VirtualAddress == 0 {
return
}
rtlAddFunctionTable.Call(module.codeBase+uintptr(directory.VirtualAddress), uintptr(directory.Size)/unsafe.Sizeof(IMAGE_RUNTIME_FUNCTION_ENTRY{}), module.codeBase)
}
func (module *Module) finalizeSections() error {
sections := module.headers.Sections()
imageOffset := module.headers.OptionalHeader.imageOffset()
sectionData := sectionFinalizeData{}
sectionData.address = uintptr(sections[0].PhysicalAddress()) | imageOffset
sectionData.alignedAddress = alignDown(sectionData.address, uintptr(module.headers.OptionalHeader.SectionAlignment))
sectionData.size = module.realSectionSize(&sections[0])
sections[0].SetVirtualSize(uint32(sectionData.size))
sectionData.characteristics = sections[0].Characteristics
// Loop through all sections and change access flags.
for i := uint16(1); i < module.headers.FileHeader.NumberOfSections; i++ {
sectionAddress := uintptr(sections[i].PhysicalAddress()) | imageOffset
alignedAddress := alignDown(sectionAddress, uintptr(module.headers.OptionalHeader.SectionAlignment))
sectionSize := module.realSectionSize(&sections[i])
sections[i].SetVirtualSize(uint32(sectionSize))
// Combine access flags of all sections that share a page.
// TODO: We currently share flags of a trailing large section with the page of a first small section. This should be optimized.
if sectionData.alignedAddress == alignedAddress || sectionData.address+sectionData.size > alignedAddress {
// Section shares page with previous.
if (sections[i].Characteristics&IMAGE_SCN_MEM_DISCARDABLE) == 0 || (sectionData.characteristics&IMAGE_SCN_MEM_DISCARDABLE) == 0 {
sectionData.characteristics = (sectionData.characteristics | sections[i].Characteristics) &^ IMAGE_SCN_MEM_DISCARDABLE
} else {
sectionData.characteristics |= sections[i].Characteristics
}
sectionData.size = sectionAddress + sectionSize - sectionData.address
continue
}
err := module.finalizeSection(&sectionData)
if err != nil {
return fmt.Errorf("Error finalizing section: %w", err)
}
sectionData.address = sectionAddress
sectionData.alignedAddress = alignedAddress
sectionData.size = sectionSize
sectionData.characteristics = sections[i].Characteristics
}
sectionData.last = true
err := module.finalizeSection(&sectionData)
if err != nil {
return fmt.Errorf("Error finalizing section: %w", err)
}
return nil
}
func (module *Module) executeTLS() {
directory := module.headerDirectory(IMAGE_DIRECTORY_ENTRY_TLS)
if directory.VirtualAddress == 0 {
return
}
tls := (*IMAGE_TLS_DIRECTORY)(a2p(module.codeBase + uintptr(directory.VirtualAddress)))
callback := tls.AddressOfCallbacks
if callback != 0 {
for {
f := *(*uintptr)(a2p(callback))
if f == 0 {
break
}
syscall.Syscall(f, 3, module.codeBase, uintptr(DLL_PROCESS_ATTACH), uintptr(0))
callback += unsafe.Sizeof(f)
}
}
}
func (module *Module) performBaseRelocation(delta uintptr) (relocated bool, err error) {
directory := module.headerDirectory(IMAGE_DIRECTORY_ENTRY_BASERELOC)
if directory.Size == 0 {
return delta == 0, nil
}
relocationHdr := (*IMAGE_BASE_RELOCATION)(a2p(module.codeBase + uintptr(directory.VirtualAddress)))
for relocationHdr.VirtualAddress > 0 {
dest := module.codeBase + uintptr(relocationHdr.VirtualAddress)
relInfos := unsafe.Slice(
(*uint16)(a2p(uintptr(unsafe.Pointer(relocationHdr))+unsafe.Sizeof(*relocationHdr))),
(uintptr(relocationHdr.SizeOfBlock)-unsafe.Sizeof(*relocationHdr))/unsafe.Sizeof(uint16(0)))
for _, relInfo := range relInfos {
// The upper 4 bits define the type of relocation.
relType := relInfo >> 12
// The lower 12 bits define the offset.
relOffset := uintptr(relInfo & 0xfff)
switch relType {
case IMAGE_REL_BASED_ABSOLUTE:
// Skip relocation.
case IMAGE_REL_BASED_LOW:
*(*uint16)(a2p(dest + relOffset)) += uint16(delta & 0xffff)
break
case IMAGE_REL_BASED_HIGH:
*(*uint16)(a2p(dest + relOffset)) += uint16(uint32(delta) >> 16)
break
case IMAGE_REL_BASED_HIGHLOW:
*(*uint32)(a2p(dest + relOffset)) += uint32(delta)
case IMAGE_REL_BASED_DIR64:
*(*uint64)(a2p(dest + relOffset)) += uint64(delta)
case IMAGE_REL_BASED_THUMB_MOV32:
inst := *(*uint32)(a2p(dest + relOffset))
imm16 := ((inst << 1) & 0x0800) + ((inst << 12) & 0xf000) +
((inst >> 20) & 0x0700) + ((inst >> 16) & 0x00ff)
if (inst & 0x8000fbf0) != 0x0000f240 {
return false, fmt.Errorf("Wrong Thumb2 instruction %08x, expected MOVW", inst)
}
imm16 += uint32(delta) & 0xffff
hiDelta := (uint32(delta&0xffff0000) >> 16) + ((imm16 & 0xffff0000) >> 16)
*(*uint32)(a2p(dest + relOffset)) = (inst & 0x8f00fbf0) + ((imm16 >> 1) & 0x0400) +
((imm16 >> 12) & 0x000f) +
((imm16 << 20) & 0x70000000) +
((imm16 << 16) & 0xff0000)
if hiDelta != 0 {
inst = *(*uint32)(a2p(dest + relOffset + 4))
imm16 = ((inst << 1) & 0x0800) + ((inst << 12) & 0xf000) +
((inst >> 20) & 0x0700) + ((inst >> 16) & 0x00ff)
if (inst & 0x8000fbf0) != 0x0000f2c0 {
return false, fmt.Errorf("Wrong Thumb2 instruction %08x, expected MOVT", inst)
}
imm16 += hiDelta
if imm16 > 0xffff {
return false, fmt.Errorf("Resulting immediate value won't fit: %08x", imm16)
}
*(*uint32)(a2p(dest + relOffset + 4)) = (inst & 0x8f00fbf0) +
((imm16 >> 1) & 0x0400) +
((imm16 >> 12) & 0x000f) +
((imm16 << 20) & 0x70000000) +
((imm16 << 16) & 0xff0000)
}
default:
return false, fmt.Errorf("Unsupported relocation: %v", relType)
}
}
// Advance to next relocation block.
relocationHdr = (*IMAGE_BASE_RELOCATION)(a2p(uintptr(unsafe.Pointer(relocationHdr)) + uintptr(relocationHdr.SizeOfBlock)))
}
return true, nil
}
func (module *Module) buildImportTable() error {
directory := module.headerDirectory(IMAGE_DIRECTORY_ENTRY_IMPORT)
if directory.Size == 0 {
return nil
}
module.modules = make([]windows.Handle, 0, 16)
importDesc := (*IMAGE_IMPORT_DESCRIPTOR)(a2p(module.codeBase + uintptr(directory.VirtualAddress)))
for importDesc.Name != 0 {
handle, err := windows.LoadLibraryEx(windows.BytePtrToString((*byte)(a2p(module.codeBase+uintptr(importDesc.Name)))), 0, windows.LOAD_LIBRARY_SEARCH_SYSTEM32)
if err != nil {
return fmt.Errorf("Error loading module: %w", err)
}
var thunkRef, funcRef *uintptr
if importDesc.OriginalFirstThunk() != 0 {
thunkRef = (*uintptr)(a2p(module.codeBase + uintptr(importDesc.OriginalFirstThunk())))
funcRef = (*uintptr)(a2p(module.codeBase + uintptr(importDesc.FirstThunk)))
} else {
// No hint table.
thunkRef = (*uintptr)(a2p(module.codeBase + uintptr(importDesc.FirstThunk)))
funcRef = (*uintptr)(a2p(module.codeBase + uintptr(importDesc.FirstThunk)))
}
for *thunkRef != 0 {
if IMAGE_SNAP_BY_ORDINAL(*thunkRef) {
*funcRef, err = windows.GetProcAddressByOrdinal(handle, IMAGE_ORDINAL(*thunkRef))
} else {
thunkData := (*IMAGE_IMPORT_BY_NAME)(a2p(module.codeBase + *thunkRef))
*funcRef, err = windows.GetProcAddress(handle, windows.BytePtrToString(&thunkData.Name[0]))
}
if err != nil {
windows.FreeLibrary(handle)
return fmt.Errorf("Error getting function address: %w", err)
}
thunkRef = (*uintptr)(a2p(uintptr(unsafe.Pointer(thunkRef)) + unsafe.Sizeof(*thunkRef)))
funcRef = (*uintptr)(a2p(uintptr(unsafe.Pointer(funcRef)) + unsafe.Sizeof(*funcRef)))
}
module.modules = append(module.modules, handle)
importDesc = (*IMAGE_IMPORT_DESCRIPTOR)(a2p(uintptr(unsafe.Pointer(importDesc)) + unsafe.Sizeof(*importDesc)))
}
return nil
}
func (module *Module) buildNameExports() error {
directory := module.headerDirectory(IMAGE_DIRECTORY_ENTRY_EXPORT)
if directory.Size == 0 {
return errors.New("No export table found")
}
exports := (*IMAGE_EXPORT_DIRECTORY)(a2p(module.codeBase + uintptr(directory.VirtualAddress)))
if exports.NumberOfNames == 0 || exports.NumberOfFunctions == 0 {
return errors.New("No functions exported")
}
if exports.NumberOfNames == 0 {
return errors.New("No functions exported by name")
}
nameRefs := unsafe.Slice((*uint32)(a2p(module.codeBase+uintptr(exports.AddressOfNames))), exports.NumberOfNames)
ordinals := unsafe.Slice((*uint16)(a2p(module.codeBase+uintptr(exports.AddressOfNameOrdinals))), exports.NumberOfNames)
module.nameExports = make(map[string]uint16)
for i := range nameRefs {
nameArray := windows.BytePtrToString((*byte)(a2p(module.codeBase + uintptr(nameRefs[i]))))
module.nameExports[nameArray] = ordinals[i]
}
return nil
}
type addressRange struct {
start uintptr
end uintptr
}
var loadedAddressRanges []addressRange
var loadedAddressRangesMu sync.RWMutex
var haveHookedRtlPcToFileHeader sync.Once
var hookRtlPcToFileHeaderResult error
func hookRtlPcToFileHeader() error {
var kernelBase windows.Handle
err := windows.GetModuleHandleEx(windows.GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT, windows.StringToUTF16Ptr("kernelbase.dll"), &kernelBase)
if err != nil {
return err
}
imageBase := unsafe.Pointer(kernelBase)
dosHeader := (*IMAGE_DOS_HEADER)(imageBase)
ntHeaders := (*IMAGE_NT_HEADERS)(unsafe.Add(imageBase, dosHeader.E_lfanew))
importsDirectory := ntHeaders.OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_IMPORT]
importDescriptor := (*IMAGE_IMPORT_DESCRIPTOR)(unsafe.Add(imageBase, importsDirectory.VirtualAddress))
for ; importDescriptor.Name != 0; importDescriptor = (*IMAGE_IMPORT_DESCRIPTOR)(unsafe.Add(unsafe.Pointer(importDescriptor), unsafe.Sizeof(*importDescriptor))) {
libraryName := windows.BytePtrToString((*byte)(unsafe.Add(imageBase, importDescriptor.Name)))
if strings.EqualFold(libraryName, "ntdll.dll") {
break
}
}
if importDescriptor.Name == 0 {
return errors.New("ntdll.dll not found")
}
originalThunk := (*uintptr)(unsafe.Add(imageBase, importDescriptor.OriginalFirstThunk()))
thunk := (*uintptr)(unsafe.Add(imageBase, importDescriptor.FirstThunk))
for ; *originalThunk != 0; originalThunk = (*uintptr)(unsafe.Add(unsafe.Pointer(originalThunk), unsafe.Sizeof(*originalThunk))) {
if *originalThunk&IMAGE_ORDINAL_FLAG == 0 {
function := (*IMAGE_IMPORT_BY_NAME)(unsafe.Add(imageBase, *originalThunk))
name := windows.BytePtrToString(&function.Name[0])
if name == "RtlPcToFileHeader" {
break
}
}
thunk = (*uintptr)(unsafe.Add(unsafe.Pointer(thunk), unsafe.Sizeof(*thunk)))
}
if *originalThunk == 0 {
return errors.New("RtlPcToFileHeader not found")
}
var oldProtect uint32
err = windows.VirtualProtect(uintptr(unsafe.Pointer(thunk)), unsafe.Sizeof(*thunk), windows.PAGE_READWRITE, &oldProtect)
if err != nil {
return err
}
originalRtlPcToFileHeader := *thunk
*thunk = windows.NewCallback(func(pcValue uintptr, baseOfImage *uintptr) uintptr {
loadedAddressRangesMu.RLock()
for i := range loadedAddressRanges {
if pcValue >= loadedAddressRanges[i].start && pcValue < loadedAddressRanges[i].end {
pcValue = *thunk
break
}
}
loadedAddressRangesMu.RUnlock()
ret, _, _ := syscall.Syscall(originalRtlPcToFileHeader, 2, pcValue, uintptr(unsafe.Pointer(baseOfImage)), 0)
return ret
})
err = windows.VirtualProtect(uintptr(unsafe.Pointer(thunk)), unsafe.Sizeof(*thunk), oldProtect, &oldProtect)
if err != nil {
return err
}
return nil
}
// LoadLibrary loads module image to memory.
func LoadLibrary(data []byte) (module *Module, err error) {
addr := uintptr(unsafe.Pointer(&data[0]))
size := uintptr(len(data))
if size < unsafe.Sizeof(IMAGE_DOS_HEADER{}) {
return nil, errors.New("Incomplete IMAGE_DOS_HEADER")
}
dosHeader := (*IMAGE_DOS_HEADER)(a2p(addr))
if dosHeader.E_magic != IMAGE_DOS_SIGNATURE {
return nil, fmt.Errorf("Not an MS-DOS binary (provided: %x, expected: %x)", dosHeader.E_magic, IMAGE_DOS_SIGNATURE)
}
if (size < uintptr(dosHeader.E_lfanew)+unsafe.Sizeof(IMAGE_NT_HEADERS{})) {
return nil, errors.New("Incomplete IMAGE_NT_HEADERS")
}
oldHeader := (*IMAGE_NT_HEADERS)(a2p(addr + uintptr(dosHeader.E_lfanew)))
if oldHeader.Signature != IMAGE_NT_SIGNATURE {
return nil, fmt.Errorf("Not an NT binary (provided: %x, expected: %x)", oldHeader.Signature, IMAGE_NT_SIGNATURE)
}
if oldHeader.FileHeader.Machine != imageFileProcess {
return nil, fmt.Errorf("Foreign platform (provided: %x, expected: %x)", oldHeader.FileHeader.Machine, imageFileProcess)
}
if (oldHeader.OptionalHeader.SectionAlignment & 1) != 0 {
return nil, errors.New("Unaligned section")
}
lastSectionEnd := uintptr(0)
sections := oldHeader.Sections()
optionalSectionSize := oldHeader.OptionalHeader.SectionAlignment
for i := range sections {
var endOfSection uintptr
if sections[i].SizeOfRawData == 0 {
// Section without data in the DLL
endOfSection = uintptr(sections[i].VirtualAddress) + uintptr(optionalSectionSize)
} else {
endOfSection = uintptr(sections[i].VirtualAddress) + uintptr(sections[i].SizeOfRawData)
}
if endOfSection > lastSectionEnd {
lastSectionEnd = endOfSection
}
}
alignedImageSize := alignUp(uintptr(oldHeader.OptionalHeader.SizeOfImage), uintptr(oldHeader.OptionalHeader.SectionAlignment))
if alignedImageSize != alignUp(lastSectionEnd, uintptr(oldHeader.OptionalHeader.SectionAlignment)) {
return nil, errors.New("Section is not page-aligned")
}
module = &Module{isDLL: (oldHeader.FileHeader.Characteristics & IMAGE_FILE_DLL) != 0}
defer func() {
if err != nil {
module.Free()
module = nil
}
}()
// Reserve memory for image of library.
// TODO: Is it correct to commit the complete memory region at once? Calling DllEntry raises an exception if we don't.
module.codeBase, err = windows.VirtualAlloc(oldHeader.OptionalHeader.ImageBase,
alignedImageSize,
windows.MEM_RESERVE|windows.MEM_COMMIT,
windows.PAGE_READWRITE)
if err != nil {
// Try to allocate memory at arbitrary position.
module.codeBase, err = windows.VirtualAlloc(0,
alignedImageSize,
windows.MEM_RESERVE|windows.MEM_COMMIT,
windows.PAGE_READWRITE)
if err != nil {
err = fmt.Errorf("Error allocating code: %w", err)
return
}
}
err = module.check4GBBoundaries(alignedImageSize)
if err != nil {
err = fmt.Errorf("Error reallocating code: %w", err)
return
}
if size < uintptr(oldHeader.OptionalHeader.SizeOfHeaders) {
err = errors.New("Incomplete headers")
return
}
// Commit memory for headers.
headers, err := windows.VirtualAlloc(module.codeBase,
uintptr(oldHeader.OptionalHeader.SizeOfHeaders),
windows.MEM_COMMIT,
windows.PAGE_READWRITE)
if err != nil {
err = fmt.Errorf("Error allocating headers: %w", err)
return
}
// Copy PE header to code.
memcpy(headers, addr, uintptr(oldHeader.OptionalHeader.SizeOfHeaders))
module.headers = (*IMAGE_NT_HEADERS)(a2p(headers + uintptr(dosHeader.E_lfanew)))
// Update position.
module.headers.OptionalHeader.ImageBase = module.codeBase
// Copy sections from DLL file block to new memory location.
err = module.copySections(addr, size, oldHeader)
if err != nil {
err = fmt.Errorf("Error copying sections: %w", err)
return
}
// Adjust base address of imported data.
locationDelta := module.headers.OptionalHeader.ImageBase - oldHeader.OptionalHeader.ImageBase
if locationDelta != 0 {
module.isRelocated, err = module.performBaseRelocation(locationDelta)
if err != nil {
err = fmt.Errorf("Error relocating module: %w", err)
return
}
} else {
module.isRelocated = true
}
// Load required dlls and adjust function table of imports.
err = module.buildImportTable()
if err != nil {
err = fmt.Errorf("Error building import table: %w", err)
return
}
// Mark memory pages depending on section headers and release sections that are marked as "discardable".
err = module.finalizeSections()
if err != nil {
err = fmt.Errorf("Error finalizing sections: %w", err)
return
}
// Register exception tables, if they exist.
module.registerExceptionHandlers()
// Register function PCs.
loadedAddressRangesMu.Lock()
loadedAddressRanges = append(loadedAddressRanges, addressRange{module.codeBase, module.codeBase + alignedImageSize})
loadedAddressRangesMu.Unlock()
haveHookedRtlPcToFileHeader.Do(func() {
hookRtlPcToFileHeaderResult = hookRtlPcToFileHeader()
})
err = hookRtlPcToFileHeaderResult
if err != nil {
return
}
// TLS callbacks are executed BEFORE the main loading.
module.executeTLS()
// Get entry point of loaded module.
if module.headers.OptionalHeader.AddressOfEntryPoint != 0 {
module.entry = module.codeBase + uintptr(module.headers.OptionalHeader.AddressOfEntryPoint)
if module.isDLL {
// Notify library about attaching to process.
r0, _, _ := syscall.Syscall(module.entry, 3, module.codeBase, uintptr(DLL_PROCESS_ATTACH), 0)
successful := r0 != 0
if !successful {
err = windows.ERROR_DLL_INIT_FAILED
return
}
module.initialized = true
}
}
module.buildNameExports()
return
}
// Free releases module resources and unloads it.
func (module *Module) Free() {
if module.initialized {
// Notify library about detaching from process.
syscall.Syscall(module.entry, 3, module.codeBase, uintptr(DLL_PROCESS_DETACH), 0)
module.initialized = false
}
if module.modules != nil {
// Free previously opened libraries.
for _, handle := range module.modules {
windows.FreeLibrary(handle)
}
module.modules = nil
}
if module.codeBase != 0 {
windows.VirtualFree(module.codeBase, 0, windows.MEM_RELEASE)
module.codeBase = 0
}
if module.blockedMemory != nil {
module.blockedMemory.free()
module.blockedMemory = nil
}
}
// ProcAddressByName returns function address by exported name.
func (module *Module) ProcAddressByName(name string) (uintptr, error) {
directory := module.headerDirectory(IMAGE_DIRECTORY_ENTRY_EXPORT)
if directory.Size == 0 {
return 0, errors.New("No export table found")
}
exports := (*IMAGE_EXPORT_DIRECTORY)(a2p(module.codeBase + uintptr(directory.VirtualAddress)))
if module.nameExports == nil {
return 0, errors.New("No functions exported by name")
}
if idx, ok := module.nameExports[name]; ok {
if uint32(idx) > exports.NumberOfFunctions {
return 0, errors.New("Ordinal number too high")
}
// AddressOfFunctions contains the RVAs to the "real" functions.
return module.codeBase + uintptr(*(*uint32)(a2p(module.codeBase + uintptr(exports.AddressOfFunctions) + uintptr(idx)*4))), nil
}
return 0, errors.New("Function not found by name")
}
// ProcAddressByOrdinal returns function address by exported ordinal.
func (module *Module) ProcAddressByOrdinal(ordinal uint16) (uintptr, error) {
directory := module.headerDirectory(IMAGE_DIRECTORY_ENTRY_EXPORT)
if directory.Size == 0 {
return 0, errors.New("No export table found")
}
exports := (*IMAGE_EXPORT_DIRECTORY)(a2p(module.codeBase + uintptr(directory.VirtualAddress)))
if uint32(ordinal) < exports.Base {
return 0, errors.New("Ordinal number too low")
}
idx := ordinal - uint16(exports.Base)
if uint32(idx) > exports.NumberOfFunctions {
return 0, errors.New("Ordinal number too high")
}
// AddressOfFunctions contains the RVAs to the "real" functions.
return module.codeBase + uintptr(*(*uint32)(a2p(module.codeBase + uintptr(exports.AddressOfFunctions) + uintptr(idx)*4))), nil
}
func alignDown(value, alignment uintptr) uintptr {
return value & ^(alignment - 1)
}
func alignUp(value, alignment uintptr) uintptr {
return (value + alignment - 1) & ^(alignment - 1)
}
func a2p(addr uintptr) unsafe.Pointer {
return unsafe.Pointer(addr)
}
func memcpy(dst, src, size uintptr) {
copy(unsafe.Slice((*byte)(a2p(dst)), size), unsafe.Slice((*byte)(a2p(src)), size))
}

16
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//go:build (windows && 386) || (windows && arm)
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
*/
package memmod
func (opthdr *IMAGE_OPTIONAL_HEADER) imageOffset() uintptr {
return 0
}
func (module *Module) check4GBBoundaries(alignedImageSize uintptr) (err error) {
return
}

8
tun/wintun/memmod/memmod_windows_386.go
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@ -1,8 +0,0 @@
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
*/
package memmod
const imageFileProcess = IMAGE_FILE_MACHINE_I386

36
tun/wintun/memmod/memmod_windows_64.go
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@ -1,36 +0,0 @@
//go:build (windows && amd64) || (windows && arm64)
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
*/
package memmod
import (
"fmt"
"golang.org/x/sys/windows"
)
func (opthdr *IMAGE_OPTIONAL_HEADER) imageOffset() uintptr {
return uintptr(opthdr.ImageBase & 0xffffffff00000000)
}
func (module *Module) check4GBBoundaries(alignedImageSize uintptr) (err error) {
for (module.codeBase >> 32) < ((module.codeBase + alignedImageSize) >> 32) {
node := &addressList{
next: module.blockedMemory,
address: module.codeBase,
}
module.blockedMemory = node
module.codeBase, err = windows.VirtualAlloc(0,
alignedImageSize,
windows.MEM_RESERVE|windows.MEM_COMMIT,
windows.PAGE_READWRITE)
if err != nil {
return fmt.Errorf("Error allocating memory block: %w", err)
}
}
return
}

8
tun/wintun/memmod/memmod_windows_amd64.go
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@ -1,8 +0,0 @@
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
*/
package memmod
const imageFileProcess = IMAGE_FILE_MACHINE_AMD64

8
tun/wintun/memmod/memmod_windows_arm.go
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@ -1,8 +0,0 @@
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
*/
package memmod
const imageFileProcess = IMAGE_FILE_MACHINE_ARMNT

8
tun/wintun/memmod/memmod_windows_arm64.go
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@ -1,8 +0,0 @@
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
*/
package memmod
const imageFileProcess = IMAGE_FILE_MACHINE_ARM64

398
tun/wintun/memmod/syscall_windows.go
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@ -1,398 +0,0 @@
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
*/
package memmod
import "unsafe"
const (
IMAGE_DOS_SIGNATURE = 0x5A4D // MZ
IMAGE_OS2_SIGNATURE = 0x454E // NE
IMAGE_OS2_SIGNATURE_LE = 0x454C // LE
IMAGE_VXD_SIGNATURE = 0x454C // LE
IMAGE_NT_SIGNATURE = 0x00004550 // PE00
)
// DOS .EXE header
type IMAGE_DOS_HEADER struct {
E_magic uint16 // Magic number
E_cblp uint16 // Bytes on last page of file
E_cp uint16 // Pages in file
E_crlc uint16 // Relocations
E_cparhdr uint16 // Size of header in paragraphs
E_minalloc uint16 // Minimum extra paragraphs needed
E_maxalloc uint16 // Maximum extra paragraphs needed
E_ss uint16 // Initial (relative) SS value
E_sp uint16 // Initial SP value
E_csum uint16 // Checksum
E_ip uint16 // Initial IP value
E_cs uint16 // Initial (relative) CS value
E_lfarlc uint16 // File address of relocation table
E_ovno uint16 // Overlay number
E_res [4]uint16 // Reserved words
E_oemid uint16 // OEM identifier (for e_oeminfo)
E_oeminfo uint16 // OEM information; e_oemid specific
E_res2 [10]uint16 // Reserved words
E_lfanew int32 // File address of new exe header
}
// File header format
type IMAGE_FILE_HEADER struct {
Machine uint16
NumberOfSections uint16
TimeDateStamp uint32
PointerToSymbolTable uint32
NumberOfSymbols uint32
SizeOfOptionalHeader uint16
Characteristics uint16
}
const (
IMAGE_SIZEOF_FILE_HEADER = 20
IMAGE_FILE_RELOCS_STRIPPED = 0x0001 // Relocation info stripped from file.
IMAGE_FILE_EXECUTABLE_IMAGE = 0x0002 // File is executable (i.e. no unresolved external references).
IMAGE_FILE_LINE_NUMS_STRIPPED = 0x0004 // Line nunbers stripped from file.
IMAGE_FILE_LOCAL_SYMS_STRIPPED = 0x0008 // Local symbols stripped from file.
IMAGE_FILE_AGGRESIVE_WS_TRIM = 0x0010 // Aggressively trim working set
IMAGE_FILE_LARGE_ADDRESS_AWARE = 0x0020 // App can handle >2gb addresses
IMAGE_FILE_BYTES_REVERSED_LO = 0x0080 // Bytes of machine word are reversed.
IMAGE_FILE_32BIT_MACHINE = 0x0100 // 32 bit word machine.
IMAGE_FILE_DEBUG_STRIPPED = 0x0200 // Debugging info stripped from file in .DBG file
IMAGE_FILE_REMOVABLE_RUN_FROM_SWAP = 0x0400 // If Image is on removable media, copy and run from the swap file.
IMAGE_FILE_NET_RUN_FROM_SWAP = 0x0800 // If Image is on Net, copy and run from the swap file.
IMAGE_FILE_SYSTEM = 0x1000 // System File.
IMAGE_FILE_DLL = 0x2000 // File is a DLL.
IMAGE_FILE_UP_SYSTEM_ONLY = 0x4000 // File should only be run on a UP machine
IMAGE_FILE_BYTES_REVERSED_HI = 0x8000 // Bytes of machine word are reversed.
IMAGE_FILE_MACHINE_UNKNOWN = 0
IMAGE_FILE_MACHINE_TARGET_HOST = 0x0001 // Useful for indicating we want to interact with the host and not a WoW guest.
IMAGE_FILE_MACHINE_I386 = 0x014c // Intel 386.
IMAGE_FILE_MACHINE_R3000 = 0x0162 // MIPS little-endian, 0x160 big-endian
IMAGE_FILE_MACHINE_R4000 = 0x0166 // MIPS little-endian
IMAGE_FILE_MACHINE_R10000 = 0x0168 // MIPS little-endian
IMAGE_FILE_MACHINE_WCEMIPSV2 = 0x0169 // MIPS little-endian WCE v2
IMAGE_FILE_MACHINE_ALPHA = 0x0184 // Alpha_AXP
IMAGE_FILE_MACHINE_SH3 = 0x01a2 // SH3 little-endian
IMAGE_FILE_MACHINE_SH3DSP = 0x01a3
IMAGE_FILE_MACHINE_SH3E = 0x01a4 // SH3E little-endian
IMAGE_FILE_MACHINE_SH4 = 0x01a6 // SH4 little-endian
IMAGE_FILE_MACHINE_SH5 = 0x01a8 // SH5
IMAGE_FILE_MACHINE_ARM = 0x01c0 // ARM Little-Endian
IMAGE_FILE_MACHINE_THUMB = 0x01c2 // ARM Thumb/Thumb-2 Little-Endian
IMAGE_FILE_MACHINE_ARMNT = 0x01c4 // ARM Thumb-2 Little-Endian
IMAGE_FILE_MACHINE_AM33 = 0x01d3
IMAGE_FILE_MACHINE_POWERPC = 0x01F0 // IBM PowerPC Little-Endian
IMAGE_FILE_MACHINE_POWERPCFP = 0x01f1
IMAGE_FILE_MACHINE_IA64 = 0x0200 // Intel 64
IMAGE_FILE_MACHINE_MIPS16 = 0x0266 // MIPS
IMAGE_FILE_MACHINE_ALPHA64 = 0x0284 // ALPHA64
IMAGE_FILE_MACHINE_MIPSFPU = 0x0366 // MIPS
IMAGE_FILE_MACHINE_MIPSFPU16 = 0x0466 // MIPS
IMAGE_FILE_MACHINE_AXP64 = IMAGE_FILE_MACHINE_ALPHA64
IMAGE_FILE_MACHINE_TRICORE = 0x0520 // Infineon
IMAGE_FILE_MACHINE_CEF = 0x0CEF
IMAGE_FILE_MACHINE_EBC = 0x0EBC // EFI Byte Code
IMAGE_FILE_MACHINE_AMD64 = 0x8664 // AMD64 (K8)
IMAGE_FILE_MACHINE_M32R = 0x9041 // M32R little-endian
IMAGE_FILE_MACHINE_ARM64 = 0xAA64 // ARM64 Little-Endian
IMAGE_FILE_MACHINE_CEE = 0xC0EE
)
// Directory format
type IMAGE_DATA_DIRECTORY struct {
VirtualAddress uint32
Size uint32
}
const IMAGE_NUMBEROF_DIRECTORY_ENTRIES = 16
type IMAGE_NT_HEADERS struct {
Signature uint32
FileHeader IMAGE_FILE_HEADER
OptionalHeader IMAGE_OPTIONAL_HEADER
}
func (ntheader *IMAGE_NT_HEADERS) Sections() []IMAGE_SECTION_HEADER {
return (*[0xffff]IMAGE_SECTION_HEADER)(unsafe.Pointer(
(uintptr)(unsafe.Pointer(ntheader)) +
unsafe.Offsetof(ntheader.OptionalHeader) +
uintptr(ntheader.FileHeader.SizeOfOptionalHeader)))[:ntheader.FileHeader.NumberOfSections]
}
const (
IMAGE_DIRECTORY_ENTRY_EXPORT = 0 // Export Directory
IMAGE_DIRECTORY_ENTRY_IMPORT = 1 // Import Directory
IMAGE_DIRECTORY_ENTRY_RESOURCE = 2 // Resource Directory
IMAGE_DIRECTORY_ENTRY_EXCEPTION = 3 // Exception Directory
IMAGE_DIRECTORY_ENTRY_SECURITY = 4 // Security Directory
IMAGE_DIRECTORY_ENTRY_BASERELOC = 5 // Base Relocation Table
IMAGE_DIRECTORY_ENTRY_DEBUG = 6 // Debug Directory
IMAGE_DIRECTORY_ENTRY_COPYRIGHT = 7 // (X86 usage)
IMAGE_DIRECTORY_ENTRY_ARCHITECTURE = 7 // Architecture Specific Data
IMAGE_DIRECTORY_ENTRY_GLOBALPTR = 8 // RVA of GP
IMAGE_DIRECTORY_ENTRY_TLS = 9 // TLS Directory
IMAGE_DIRECTORY_ENTRY_LOAD_CONFIG = 10 // Load Configuration Directory
IMAGE_DIRECTORY_ENTRY_BOUND_IMPORT = 11 // Bound Import Directory in headers
IMAGE_DIRECTORY_ENTRY_IAT = 12 // Import Address Table
IMAGE_DIRECTORY_ENTRY_DELAY_IMPORT = 13 // Delay Load Import Descriptors
IMAGE_DIRECTORY_ENTRY_COM_DESCRIPTOR = 14 // COM Runtime descriptor
)
const IMAGE_SIZEOF_SHORT_NAME = 8
// Section header format
type IMAGE_SECTION_HEADER struct {
Name [IMAGE_SIZEOF_SHORT_NAME]byte
physicalAddressOrVirtualSize uint32
VirtualAddress uint32
SizeOfRawData uint32
PointerToRawData uint32
PointerToRelocations uint32
PointerToLinenumbers uint32
NumberOfRelocations uint16
NumberOfLinenumbers uint16
Characteristics uint32
}
func (ishdr *IMAGE_SECTION_HEADER) PhysicalAddress() uint32 {
return ishdr.physicalAddressOrVirtualSize
}
func (ishdr *IMAGE_SECTION_HEADER) SetPhysicalAddress(addr uint32) {
ishdr.physicalAddressOrVirtualSize = addr
}
func (ishdr *IMAGE_SECTION_HEADER) VirtualSize() uint32 {
return ishdr.physicalAddressOrVirtualSize
}
func (ishdr *IMAGE_SECTION_HEADER) SetVirtualSize(addr uint32) {
ishdr.physicalAddressOrVirtualSize = addr
}
const (
// Dll characteristics.
IMAGE_DLL_CHARACTERISTICS_HIGH_ENTROPY_VA = 0x0020
IMAGE_DLL_CHARACTERISTICS_DYNAMIC_BASE = 0x0040
IMAGE_DLL_CHARACTERISTICS_FORCE_INTEGRITY = 0x0080
IMAGE_DLL_CHARACTERISTICS_NX_COMPAT = 0x0100
IMAGE_DLL_CHARACTERISTICS_NO_ISOLATION = 0x0200
IMAGE_DLL_CHARACTERISTICS_NO_SEH = 0x0400
IMAGE_DLL_CHARACTERISTICS_NO_BIND = 0x0800
IMAGE_DLL_CHARACTERISTICS_APPCONTAINER = 0x1000
IMAGE_DLL_CHARACTERISTICS_WDM_DRIVER = 0x2000
IMAGE_DLL_CHARACTERISTICS_GUARD_CF = 0x4000
IMAGE_DLL_CHARACTERISTICS_TERMINAL_SERVER_AWARE = 0x8000
)
const (
// Section characteristics.
IMAGE_SCN_TYPE_REG = 0x00000000 // Reserved.
IMAGE_SCN_TYPE_DSECT = 0x00000001 // Reserved.
IMAGE_SCN_TYPE_NOLOAD = 0x00000002 // Reserved.
IMAGE_SCN_TYPE_GROUP = 0x00000004 // Reserved.
IMAGE_SCN_TYPE_NO_PAD = 0x00000008 // Reserved.
IMAGE_SCN_TYPE_COPY = 0x00000010 // Reserved.
IMAGE_SCN_CNT_CODE = 0x00000020 // Section contains code.
IMAGE_SCN_CNT_INITIALIZED_DATA = 0x00000040 // Section contains initialized data.
IMAGE_SCN_CNT_UNINITIALIZED_DATA = 0x00000080 // Section contains uninitialized data.
IMAGE_SCN_LNK_OTHER = 0x00000100 // Reserved.
IMAGE_SCN_LNK_INFO = 0x00000200 // Section contains comments or some other type of information.
IMAGE_SCN_TYPE_OVER = 0x00000400 // Reserved.
IMAGE_SCN_LNK_REMOVE = 0x00000800 // Section contents will not become part of image.
IMAGE_SCN_LNK_COMDAT = 0x00001000 // Section contents comdat.
IMAGE_SCN_MEM_PROTECTED = 0x00004000 // Obsolete.
IMAGE_SCN_NO_DEFER_SPEC_EXC = 0x00004000 // Reset speculative exceptions handling bits in the TLB entries for this section.
IMAGE_SCN_GPREL = 0x00008000 // Section content can be accessed relative to GP
IMAGE_SCN_MEM_FARDATA = 0x00008000
IMAGE_SCN_MEM_SYSHEAP = 0x00010000 // Obsolete.
IMAGE_SCN_MEM_PURGEABLE = 0x00020000
IMAGE_SCN_MEM_16BIT = 0x00020000
IMAGE_SCN_MEM_LOCKED = 0x00040000
IMAGE_SCN_MEM_PRELOAD = 0x00080000
IMAGE_SCN_ALIGN_1BYTES = 0x00100000 //
IMAGE_SCN_ALIGN_2BYTES = 0x00200000 //
IMAGE_SCN_ALIGN_4BYTES = 0x00300000 //
IMAGE_SCN_ALIGN_8BYTES = 0x00400000 //
IMAGE_SCN_ALIGN_16BYTES = 0x00500000 // Default alignment if no others are specified.
IMAGE_SCN_ALIGN_32BYTES = 0x00600000 //
IMAGE_SCN_ALIGN_64BYTES = 0x00700000 //
IMAGE_SCN_ALIGN_128BYTES = 0x00800000 //
IMAGE_SCN_ALIGN_256BYTES = 0x00900000 //
IMAGE_SCN_ALIGN_512BYTES = 0x00A00000 //
IMAGE_SCN_ALIGN_1024BYTES = 0x00B00000 //
IMAGE_SCN_ALIGN_2048BYTES = 0x00C00000 //
IMAGE_SCN_ALIGN_4096BYTES = 0x00D00000 //
IMAGE_SCN_ALIGN_8192BYTES = 0x00E00000 //
IMAGE_SCN_ALIGN_MASK = 0x00F00000
IMAGE_SCN_LNK_NRELOC_OVFL = 0x01000000 // Section contains extended relocations.
IMAGE_SCN_MEM_DISCARDABLE = 0x02000000 // Section can be discarded.
IMAGE_SCN_MEM_NOT_CACHED = 0x04000000 // Section is not cachable.
IMAGE_SCN_MEM_NOT_PAGED = 0x08000000 // Section is not pageable.
IMAGE_SCN_MEM_SHARED = 0x10000000 // Section is shareable.
IMAGE_SCN_MEM_EXECUTE = 0x20000000 // Section is executable.
IMAGE_SCN_MEM_READ = 0x40000000 // Section is readable.
IMAGE_SCN_MEM_WRITE = 0x80000000 // Section is writeable.
// TLS Characteristic Flags
IMAGE_SCN_SCALE_INDEX = 0x00000001 // Tls index is scaled.
)
// Based relocation format
type IMAGE_BASE_RELOCATION struct {
VirtualAddress uint32
SizeOfBlock uint32
}
const (
IMAGE_REL_BASED_ABSOLUTE = 0
IMAGE_REL_BASED_HIGH = 1
IMAGE_REL_BASED_LOW = 2
IMAGE_REL_BASED_HIGHLOW = 3
IMAGE_REL_BASED_HIGHADJ = 4
IMAGE_REL_BASED_MACHINE_SPECIFIC_5 = 5
IMAGE_REL_BASED_RESERVED = 6
IMAGE_REL_BASED_MACHINE_SPECIFIC_7 = 7
IMAGE_REL_BASED_MACHINE_SPECIFIC_8 = 8
IMAGE_REL_BASED_MACHINE_SPECIFIC_9 = 9
IMAGE_REL_BASED_DIR64 = 10
IMAGE_REL_BASED_IA64_IMM64 = 9
IMAGE_REL_BASED_MIPS_JMPADDR = 5
IMAGE_REL_BASED_MIPS_JMPADDR16 = 9
IMAGE_REL_BASED_ARM_MOV32 = 5
IMAGE_REL_BASED_THUMB_MOV32 = 7
)
// Export Format
type IMAGE_EXPORT_DIRECTORY struct {
Characteristics uint32
TimeDateStamp uint32
MajorVersion uint16
MinorVersion uint16
Name uint32
Base uint32
NumberOfFunctions uint32
NumberOfNames uint32
AddressOfFunctions uint32 // RVA from base of image
AddressOfNames uint32 // RVA from base of image
AddressOfNameOrdinals uint32 // RVA from base of image
}
type IMAGE_IMPORT_BY_NAME struct {
Hint uint16
Name [1]byte
}
func IMAGE_ORDINAL(ordinal uintptr) uintptr {
return ordinal & 0xffff
}
func IMAGE_SNAP_BY_ORDINAL(ordinal uintptr) bool {
return (ordinal & IMAGE_ORDINAL_FLAG) != 0
}
// Thread Local Storage
type IMAGE_TLS_DIRECTORY struct {
StartAddressOfRawData uintptr
EndAddressOfRawData uintptr
AddressOfIndex uintptr // PDWORD
AddressOfCallbacks uintptr // PIMAGE_TLS_CALLBACK *;
SizeOfZeroFill uint32
Characteristics uint32
}
type IMAGE_IMPORT_DESCRIPTOR struct {
characteristicsOrOriginalFirstThunk uint32 // 0 for terminating null import descriptor
// RVA to original unbound IAT (PIMAGE_THUNK_DATA)
TimeDateStamp uint32 // 0 if not bound,
// -1 if bound, and real date\time stamp
// in IMAGE_DIRECTORY_ENTRY_BOUND_IMPORT (new BIND)
// O.W. date/time stamp of DLL bound to (Old BIND)
ForwarderChain uint32 // -1 if no forwarders
Name uint32
FirstThunk uint32 // RVA to IAT (if bound this IAT has actual addresses)
}
func (imgimpdesc *IMAGE_IMPORT_DESCRIPTOR) Characteristics() uint32 {
return imgimpdesc.characteristicsOrOriginalFirstThunk
}
func (imgimpdesc *IMAGE_IMPORT_DESCRIPTOR) OriginalFirstThunk() uint32 {
return imgimpdesc.characteristicsOrOriginalFirstThunk
}
type IMAGE_DELAYLOAD_DESCRIPTOR struct {
Attributes uint32
DllNameRVA uint32
ModuleHandleRVA uint32
ImportAddressTableRVA uint32
ImportNameTableRVA uint32
BoundImportAddressTableRVA uint32
UnloadInformationTableRVA uint32
TimeDateStamp uint32
}
type IMAGE_LOAD_CONFIG_CODE_INTEGRITY struct {
Flags uint16
Catalog uint16
CatalogOffset uint32
Reserved uint32
}
const (
IMAGE_GUARD_CF_INSTRUMENTED = 0x00000100
IMAGE_GUARD_CFW_INSTRUMENTED = 0x00000200
IMAGE_GUARD_CF_FUNCTION_TABLE_PRESENT = 0x00000400
IMAGE_GUARD_SECURITY_COOKIE_UNUSED = 0x00000800
IMAGE_GUARD_PROTECT_DELAYLOAD_IAT = 0x00001000
IMAGE_GUARD_DELAYLOAD_IAT_IN_ITS_OWN_SECTION = 0x00002000
IMAGE_GUARD_CF_EXPORT_SUPPRESSION_INFO_PRESENT = 0x00004000
IMAGE_GUARD_CF_ENABLE_EXPORT_SUPPRESSION = 0x00008000
IMAGE_GUARD_CF_LONGJUMP_TABLE_PRESENT = 0x00010000
IMAGE_GUARD_RF_INSTRUMENTED = 0x00020000
IMAGE_GUARD_RF_ENABLE = 0x00040000
IMAGE_GUARD_RF_STRICT = 0x00080000
IMAGE_GUARD_RETPOLINE_PRESENT = 0x00100000
IMAGE_GUARD_EH_CONTINUATION_TABLE_PRESENT = 0x00400000
IMAGE_GUARD_XFG_ENABLED = 0x00800000
IMAGE_GUARD_CF_FUNCTION_TABLE_SIZE_MASK = 0xF0000000
IMAGE_GUARD_CF_FUNCTION_TABLE_SIZE_SHIFT = 28
)
type IMAGE_RUNTIME_FUNCTION_ENTRY struct {
BeginAddress uint32
EndAddress uint32
UnwindInfoAddress uint32
}
const (
DLL_PROCESS_ATTACH = 1
DLL_THREAD_ATTACH = 2
DLL_THREAD_DETACH = 3
DLL_PROCESS_DETACH = 0
)
type SYSTEM_INFO struct {
ProcessorArchitecture uint16
Reserved uint16
PageSize uint32
MinimumApplicationAddress uintptr
MaximumApplicationAddress uintptr
ActiveProcessorMask uintptr
NumberOfProcessors uint32
ProcessorType uint32
AllocationGranularity uint32
ProcessorLevel uint16
ProcessorRevision uint16
}

96
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@ -1,96 +0,0 @@
//go:build (windows && 386) || (windows && arm)
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
*/
package memmod
// Optional header format
type IMAGE_OPTIONAL_HEADER struct {
Magic uint16
MajorLinkerVersion uint8
MinorLinkerVersion uint8
SizeOfCode uint32
SizeOfInitializedData uint32
SizeOfUninitializedData uint32
AddressOfEntryPoint uint32
BaseOfCode uint32
BaseOfData uint32
ImageBase uintptr
SectionAlignment uint32
FileAlignment uint32
MajorOperatingSystemVersion uint16
MinorOperatingSystemVersion uint16
MajorImageVersion uint16
MinorImageVersion uint16
MajorSubsystemVersion uint16
MinorSubsystemVersion uint16
Win32VersionValue uint32
SizeOfImage uint32
SizeOfHeaders uint32
CheckSum uint32
Subsystem uint16
DllCharacteristics uint16
SizeOfStackReserve uintptr
SizeOfStackCommit uintptr
SizeOfHeapReserve uintptr
SizeOfHeapCommit uintptr
LoaderFlags uint32
NumberOfRvaAndSizes uint32
DataDirectory [IMAGE_NUMBEROF_DIRECTORY_ENTRIES]IMAGE_DATA_DIRECTORY
}
const IMAGE_ORDINAL_FLAG uintptr = 0x80000000
type IMAGE_LOAD_CONFIG_DIRECTORY struct {
Size uint32
TimeDateStamp uint32
MajorVersion uint16
MinorVersion uint16
GlobalFlagsClear uint32
GlobalFlagsSet uint32
CriticalSectionDefaultTimeout uint32
DeCommitFreeBlockThreshold uint32
DeCommitTotalFreeThreshold uint32
LockPrefixTable uint32
MaximumAllocationSize uint32
VirtualMemoryThreshold uint32
ProcessHeapFlags uint32
ProcessAffinityMask uint32
CSDVersion uint16
DependentLoadFlags uint16
EditList uint32
SecurityCookie uint32
SEHandlerTable uint32
SEHandlerCount uint32
GuardCFCheckFunctionPointer uint32
GuardCFDispatchFunctionPointer uint32
GuardCFFunctionTable uint32
GuardCFFunctionCount uint32
GuardFlags uint32
CodeIntegrity IMAGE_LOAD_CONFIG_CODE_INTEGRITY
GuardAddressTakenIatEntryTable uint32
GuardAddressTakenIatEntryCount uint32
GuardLongJumpTargetTable uint32
GuardLongJumpTargetCount uint32
DynamicValueRelocTable uint32
CHPEMetadataPointer uint32
GuardRFFailureRoutine uint32
GuardRFFailureRoutineFunctionPointer uint32
DynamicValueRelocTableOffset uint32
DynamicValueRelocTableSection uint16
Reserved2 uint16
GuardRFVerifyStackPointerFunctionPointer uint32
HotPatchTableOffset uint32
Reserved3 uint32
EnclaveConfigurationPointer uint32
VolatileMetadataPointer uint32
GuardEHContinuationTable uint32
GuardEHContinuationCount uint32
GuardXFGCheckFunctionPointer uint32
GuardXFGDispatchFunctionPointer uint32
GuardXFGTableDispatchFunctionPointer uint32
CastGuardOsDeterminedFailureMode uint32
}

95
tun/wintun/memmod/syscall_windows_64.go
View file

@ -1,95 +0,0 @@
//go:build (windows && amd64) || (windows && arm64)
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
*/
package memmod
// Optional header format
type IMAGE_OPTIONAL_HEADER struct {
Magic uint16
MajorLinkerVersion uint8
MinorLinkerVersion uint8
SizeOfCode uint32
SizeOfInitializedData uint32
SizeOfUninitializedData uint32
AddressOfEntryPoint uint32
BaseOfCode uint32
ImageBase uintptr
SectionAlignment uint32
FileAlignment uint32
MajorOperatingSystemVersion uint16
MinorOperatingSystemVersion uint16
MajorImageVersion uint16
MinorImageVersion uint16
MajorSubsystemVersion uint16
MinorSubsystemVersion uint16
Win32VersionValue uint32
SizeOfImage uint32
SizeOfHeaders uint32
CheckSum uint32
Subsystem uint16
DllCharacteristics uint16
SizeOfStackReserve uintptr
SizeOfStackCommit uintptr
SizeOfHeapReserve uintptr
SizeOfHeapCommit uintptr
LoaderFlags uint32
NumberOfRvaAndSizes uint32
DataDirectory [IMAGE_NUMBEROF_DIRECTORY_ENTRIES]IMAGE_DATA_DIRECTORY
}
const IMAGE_ORDINAL_FLAG uintptr = 0x8000000000000000
type IMAGE_LOAD_CONFIG_DIRECTORY struct {
Size uint32
TimeDateStamp uint32
MajorVersion uint16
MinorVersion uint16
GlobalFlagsClear uint32
GlobalFlagsSet uint32
CriticalSectionDefaultTimeout uint32
DeCommitFreeBlockThreshold uint64
DeCommitTotalFreeThreshold uint64
LockPrefixTable uint64
MaximumAllocationSize uint64
VirtualMemoryThreshold uint64
ProcessAffinityMask uint64
ProcessHeapFlags uint32
CSDVersion uint16
DependentLoadFlags uint16
EditList uint64
SecurityCookie uint64
SEHandlerTable uint64
SEHandlerCount uint64
GuardCFCheckFunctionPointer uint64
GuardCFDispatchFunctionPointer uint64
GuardCFFunctionTable uint64
GuardCFFunctionCount uint64
GuardFlags uint32
CodeIntegrity IMAGE_LOAD_CONFIG_CODE_INTEGRITY
GuardAddressTakenIatEntryTable uint64
GuardAddressTakenIatEntryCount uint64
GuardLongJumpTargetTable uint64
GuardLongJumpTargetCount uint64
DynamicValueRelocTable uint64
CHPEMetadataPointer uint64
GuardRFFailureRoutine uint64
GuardRFFailureRoutineFunctionPointer uint64
DynamicValueRelocTableOffset uint32
DynamicValueRelocTableSection uint16
Reserved2 uint16
GuardRFVerifyStackPointerFunctionPointer uint64
HotPatchTableOffset uint32
Reserved3 uint32
EnclaveConfigurationPointer uint64
VolatileMetadataPointer uint64
GuardEHContinuationTable uint64
GuardEHContinuationCount uint64
GuardXFGCheckFunctionPointer uint64
GuardXFGDispatchFunctionPointer uint64
GuardXFGTableDispatchFunctionPointer uint64
CastGuardOsDeterminedFailureMode uint64
}