mirror of
https://git.zx2c4.com/wireguard-go
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342 lines
13 KiB
Go
342 lines
13 KiB
Go
/* SPDX-License-Identifier: MIT
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*
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* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
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*/
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package memmod
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import "unsafe"
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const (
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IMAGE_DOS_SIGNATURE = 0x5A4D // MZ
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IMAGE_OS2_SIGNATURE = 0x454E // NE
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IMAGE_OS2_SIGNATURE_LE = 0x454C // LE
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IMAGE_VXD_SIGNATURE = 0x454C // LE
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IMAGE_NT_SIGNATURE = 0x00004550 // PE00
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)
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// DOS .EXE header
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type IMAGE_DOS_HEADER struct {
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E_magic uint16 // Magic number
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E_cblp uint16 // Bytes on last page of file
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E_cp uint16 // Pages in file
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E_crlc uint16 // Relocations
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E_cparhdr uint16 // Size of header in paragraphs
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E_minalloc uint16 // Minimum extra paragraphs needed
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E_maxalloc uint16 // Maximum extra paragraphs needed
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E_ss uint16 // Initial (relative) SS value
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E_sp uint16 // Initial SP value
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E_csum uint16 // Checksum
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E_ip uint16 // Initial IP value
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E_cs uint16 // Initial (relative) CS value
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E_lfarlc uint16 // File address of relocation table
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E_ovno uint16 // Overlay number
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E_res [4]uint16 // Reserved words
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E_oemid uint16 // OEM identifier (for e_oeminfo)
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E_oeminfo uint16 // OEM information; e_oemid specific
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E_res2 [10]uint16 // Reserved words
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E_lfanew int32 // File address of new exe header
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}
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// File header format
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type IMAGE_FILE_HEADER struct {
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Machine uint16
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NumberOfSections uint16
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TimeDateStamp uint32
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PointerToSymbolTable uint32
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NumberOfSymbols uint32
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SizeOfOptionalHeader uint16
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Characteristics uint16
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}
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const (
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IMAGE_SIZEOF_FILE_HEADER = 20
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IMAGE_FILE_RELOCS_STRIPPED = 0x0001 // Relocation info stripped from file.
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IMAGE_FILE_EXECUTABLE_IMAGE = 0x0002 // File is executable (i.e. no unresolved external references).
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IMAGE_FILE_LINE_NUMS_STRIPPED = 0x0004 // Line nunbers stripped from file.
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IMAGE_FILE_LOCAL_SYMS_STRIPPED = 0x0008 // Local symbols stripped from file.
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IMAGE_FILE_AGGRESIVE_WS_TRIM = 0x0010 // Aggressively trim working set
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IMAGE_FILE_LARGE_ADDRESS_AWARE = 0x0020 // App can handle >2gb addresses
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IMAGE_FILE_BYTES_REVERSED_LO = 0x0080 // Bytes of machine word are reversed.
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IMAGE_FILE_32BIT_MACHINE = 0x0100 // 32 bit word machine.
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IMAGE_FILE_DEBUG_STRIPPED = 0x0200 // Debugging info stripped from file in .DBG file
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IMAGE_FILE_REMOVABLE_RUN_FROM_SWAP = 0x0400 // If Image is on removable media, copy and run from the swap file.
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IMAGE_FILE_NET_RUN_FROM_SWAP = 0x0800 // If Image is on Net, copy and run from the swap file.
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IMAGE_FILE_SYSTEM = 0x1000 // System File.
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IMAGE_FILE_DLL = 0x2000 // File is a DLL.
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IMAGE_FILE_UP_SYSTEM_ONLY = 0x4000 // File should only be run on a UP machine
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IMAGE_FILE_BYTES_REVERSED_HI = 0x8000 // Bytes of machine word are reversed.
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IMAGE_FILE_MACHINE_UNKNOWN = 0
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IMAGE_FILE_MACHINE_TARGET_HOST = 0x0001 // Useful for indicating we want to interact with the host and not a WoW guest.
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IMAGE_FILE_MACHINE_I386 = 0x014c // Intel 386.
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IMAGE_FILE_MACHINE_R3000 = 0x0162 // MIPS little-endian, 0x160 big-endian
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IMAGE_FILE_MACHINE_R4000 = 0x0166 // MIPS little-endian
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IMAGE_FILE_MACHINE_R10000 = 0x0168 // MIPS little-endian
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IMAGE_FILE_MACHINE_WCEMIPSV2 = 0x0169 // MIPS little-endian WCE v2
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IMAGE_FILE_MACHINE_ALPHA = 0x0184 // Alpha_AXP
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IMAGE_FILE_MACHINE_SH3 = 0x01a2 // SH3 little-endian
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IMAGE_FILE_MACHINE_SH3DSP = 0x01a3
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IMAGE_FILE_MACHINE_SH3E = 0x01a4 // SH3E little-endian
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IMAGE_FILE_MACHINE_SH4 = 0x01a6 // SH4 little-endian
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IMAGE_FILE_MACHINE_SH5 = 0x01a8 // SH5
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IMAGE_FILE_MACHINE_ARM = 0x01c0 // ARM Little-Endian
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IMAGE_FILE_MACHINE_THUMB = 0x01c2 // ARM Thumb/Thumb-2 Little-Endian
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IMAGE_FILE_MACHINE_ARMNT = 0x01c4 // ARM Thumb-2 Little-Endian
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IMAGE_FILE_MACHINE_AM33 = 0x01d3
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IMAGE_FILE_MACHINE_POWERPC = 0x01F0 // IBM PowerPC Little-Endian
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IMAGE_FILE_MACHINE_POWERPCFP = 0x01f1
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IMAGE_FILE_MACHINE_IA64 = 0x0200 // Intel 64
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IMAGE_FILE_MACHINE_MIPS16 = 0x0266 // MIPS
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IMAGE_FILE_MACHINE_ALPHA64 = 0x0284 // ALPHA64
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IMAGE_FILE_MACHINE_MIPSFPU = 0x0366 // MIPS
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IMAGE_FILE_MACHINE_MIPSFPU16 = 0x0466 // MIPS
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IMAGE_FILE_MACHINE_AXP64 = IMAGE_FILE_MACHINE_ALPHA64
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IMAGE_FILE_MACHINE_TRICORE = 0x0520 // Infineon
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IMAGE_FILE_MACHINE_CEF = 0x0CEF
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IMAGE_FILE_MACHINE_EBC = 0x0EBC // EFI Byte Code
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IMAGE_FILE_MACHINE_AMD64 = 0x8664 // AMD64 (K8)
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IMAGE_FILE_MACHINE_M32R = 0x9041 // M32R little-endian
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IMAGE_FILE_MACHINE_ARM64 = 0xAA64 // ARM64 Little-Endian
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IMAGE_FILE_MACHINE_CEE = 0xC0EE
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)
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// Directory format
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type IMAGE_DATA_DIRECTORY struct {
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VirtualAddress uint32
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Size uint32
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}
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const IMAGE_NUMBEROF_DIRECTORY_ENTRIES = 16
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type IMAGE_NT_HEADERS struct {
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Signature uint32
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FileHeader IMAGE_FILE_HEADER
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OptionalHeader IMAGE_OPTIONAL_HEADER
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}
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func (ntheader *IMAGE_NT_HEADERS) Sections() []IMAGE_SECTION_HEADER {
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return (*[0xffff]IMAGE_SECTION_HEADER)(unsafe.Pointer(
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(uintptr)(unsafe.Pointer(ntheader)) +
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unsafe.Offsetof(ntheader.OptionalHeader) +
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uintptr(ntheader.FileHeader.SizeOfOptionalHeader)))[:ntheader.FileHeader.NumberOfSections]
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}
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const (
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IMAGE_DIRECTORY_ENTRY_EXPORT = 0 // Export Directory
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IMAGE_DIRECTORY_ENTRY_IMPORT = 1 // Import Directory
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IMAGE_DIRECTORY_ENTRY_RESOURCE = 2 // Resource Directory
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IMAGE_DIRECTORY_ENTRY_EXCEPTION = 3 // Exception Directory
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IMAGE_DIRECTORY_ENTRY_SECURITY = 4 // Security Directory
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IMAGE_DIRECTORY_ENTRY_BASERELOC = 5 // Base Relocation Table
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IMAGE_DIRECTORY_ENTRY_DEBUG = 6 // Debug Directory
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IMAGE_DIRECTORY_ENTRY_COPYRIGHT = 7 // (X86 usage)
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IMAGE_DIRECTORY_ENTRY_ARCHITECTURE = 7 // Architecture Specific Data
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IMAGE_DIRECTORY_ENTRY_GLOBALPTR = 8 // RVA of GP
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IMAGE_DIRECTORY_ENTRY_TLS = 9 // TLS Directory
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IMAGE_DIRECTORY_ENTRY_LOAD_CONFIG = 10 // Load Configuration Directory
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IMAGE_DIRECTORY_ENTRY_BOUND_IMPORT = 11 // Bound Import Directory in headers
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IMAGE_DIRECTORY_ENTRY_IAT = 12 // Import Address Table
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IMAGE_DIRECTORY_ENTRY_DELAY_IMPORT = 13 // Delay Load Import Descriptors
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IMAGE_DIRECTORY_ENTRY_COM_DESCRIPTOR = 14 // COM Runtime descriptor
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)
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const IMAGE_SIZEOF_SHORT_NAME = 8
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// Section header format
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type IMAGE_SECTION_HEADER struct {
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Name [IMAGE_SIZEOF_SHORT_NAME]byte
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physicalAddressOrVirtualSize uint32
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VirtualAddress uint32
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SizeOfRawData uint32
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PointerToRawData uint32
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PointerToRelocations uint32
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PointerToLinenumbers uint32
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NumberOfRelocations uint16
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NumberOfLinenumbers uint16
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Characteristics uint32
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}
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func (ishdr *IMAGE_SECTION_HEADER) PhysicalAddress() uint32 {
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return ishdr.physicalAddressOrVirtualSize
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}
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func (ishdr *IMAGE_SECTION_HEADER) SetPhysicalAddress(addr uint32) {
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ishdr.physicalAddressOrVirtualSize = addr
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}
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func (ishdr *IMAGE_SECTION_HEADER) VirtualSize() uint32 {
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return ishdr.physicalAddressOrVirtualSize
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}
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func (ishdr *IMAGE_SECTION_HEADER) SetVirtualSize(addr uint32) {
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ishdr.physicalAddressOrVirtualSize = addr
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}
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const (
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// Section characteristics.
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IMAGE_SCN_TYPE_REG = 0x00000000 // Reserved.
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IMAGE_SCN_TYPE_DSECT = 0x00000001 // Reserved.
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IMAGE_SCN_TYPE_NOLOAD = 0x00000002 // Reserved.
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IMAGE_SCN_TYPE_GROUP = 0x00000004 // Reserved.
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IMAGE_SCN_TYPE_NO_PAD = 0x00000008 // Reserved.
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IMAGE_SCN_TYPE_COPY = 0x00000010 // Reserved.
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IMAGE_SCN_CNT_CODE = 0x00000020 // Section contains code.
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IMAGE_SCN_CNT_INITIALIZED_DATA = 0x00000040 // Section contains initialized data.
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IMAGE_SCN_CNT_UNINITIALIZED_DATA = 0x00000080 // Section contains uninitialized data.
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IMAGE_SCN_LNK_OTHER = 0x00000100 // Reserved.
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IMAGE_SCN_LNK_INFO = 0x00000200 // Section contains comments or some other type of information.
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IMAGE_SCN_TYPE_OVER = 0x00000400 // Reserved.
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IMAGE_SCN_LNK_REMOVE = 0x00000800 // Section contents will not become part of image.
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IMAGE_SCN_LNK_COMDAT = 0x00001000 // Section contents comdat.
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IMAGE_SCN_MEM_PROTECTED = 0x00004000 // Obsolete.
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IMAGE_SCN_NO_DEFER_SPEC_EXC = 0x00004000 // Reset speculative exceptions handling bits in the TLB entries for this section.
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IMAGE_SCN_GPREL = 0x00008000 // Section content can be accessed relative to GP
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IMAGE_SCN_MEM_FARDATA = 0x00008000
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IMAGE_SCN_MEM_SYSHEAP = 0x00010000 // Obsolete.
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IMAGE_SCN_MEM_PURGEABLE = 0x00020000
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IMAGE_SCN_MEM_16BIT = 0x00020000
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IMAGE_SCN_MEM_LOCKED = 0x00040000
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IMAGE_SCN_MEM_PRELOAD = 0x00080000
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IMAGE_SCN_ALIGN_1BYTES = 0x00100000 //
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IMAGE_SCN_ALIGN_2BYTES = 0x00200000 //
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IMAGE_SCN_ALIGN_4BYTES = 0x00300000 //
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IMAGE_SCN_ALIGN_8BYTES = 0x00400000 //
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IMAGE_SCN_ALIGN_16BYTES = 0x00500000 // Default alignment if no others are specified.
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IMAGE_SCN_ALIGN_32BYTES = 0x00600000 //
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IMAGE_SCN_ALIGN_64BYTES = 0x00700000 //
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IMAGE_SCN_ALIGN_128BYTES = 0x00800000 //
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IMAGE_SCN_ALIGN_256BYTES = 0x00900000 //
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IMAGE_SCN_ALIGN_512BYTES = 0x00A00000 //
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IMAGE_SCN_ALIGN_1024BYTES = 0x00B00000 //
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IMAGE_SCN_ALIGN_2048BYTES = 0x00C00000 //
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IMAGE_SCN_ALIGN_4096BYTES = 0x00D00000 //
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IMAGE_SCN_ALIGN_8192BYTES = 0x00E00000 //
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IMAGE_SCN_ALIGN_MASK = 0x00F00000
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IMAGE_SCN_LNK_NRELOC_OVFL = 0x01000000 // Section contains extended relocations.
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IMAGE_SCN_MEM_DISCARDABLE = 0x02000000 // Section can be discarded.
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IMAGE_SCN_MEM_NOT_CACHED = 0x04000000 // Section is not cachable.
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IMAGE_SCN_MEM_NOT_PAGED = 0x08000000 // Section is not pageable.
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IMAGE_SCN_MEM_SHARED = 0x10000000 // Section is shareable.
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IMAGE_SCN_MEM_EXECUTE = 0x20000000 // Section is executable.
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IMAGE_SCN_MEM_READ = 0x40000000 // Section is readable.
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IMAGE_SCN_MEM_WRITE = 0x80000000 // Section is writeable.
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// TLS Characteristic Flags
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IMAGE_SCN_SCALE_INDEX = 0x00000001 // Tls index is scaled.
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)
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// Based relocation format
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type IMAGE_BASE_RELOCATION struct {
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VirtualAddress uint32
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SizeOfBlock uint32
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}
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const (
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IMAGE_REL_BASED_ABSOLUTE = 0
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IMAGE_REL_BASED_HIGH = 1
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IMAGE_REL_BASED_LOW = 2
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IMAGE_REL_BASED_HIGHLOW = 3
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IMAGE_REL_BASED_HIGHADJ = 4
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IMAGE_REL_BASED_MACHINE_SPECIFIC_5 = 5
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IMAGE_REL_BASED_RESERVED = 6
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IMAGE_REL_BASED_MACHINE_SPECIFIC_7 = 7
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IMAGE_REL_BASED_MACHINE_SPECIFIC_8 = 8
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IMAGE_REL_BASED_MACHINE_SPECIFIC_9 = 9
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IMAGE_REL_BASED_DIR64 = 10
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IMAGE_REL_BASED_IA64_IMM64 = 9
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IMAGE_REL_BASED_MIPS_JMPADDR = 5
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IMAGE_REL_BASED_MIPS_JMPADDR16 = 9
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IMAGE_REL_BASED_ARM_MOV32 = 5
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IMAGE_REL_BASED_THUMB_MOV32 = 7
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)
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// Export Format
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type IMAGE_EXPORT_DIRECTORY struct {
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Characteristics uint32
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TimeDateStamp uint32
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MajorVersion uint16
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MinorVersion uint16
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Name uint32
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Base uint32
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NumberOfFunctions uint32
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NumberOfNames uint32
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AddressOfFunctions uint32 // RVA from base of image
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AddressOfNames uint32 // RVA from base of image
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AddressOfNameOrdinals uint32 // RVA from base of image
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}
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type IMAGE_IMPORT_BY_NAME struct {
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Hint uint16
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Name [1]byte
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}
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func IMAGE_ORDINAL(ordinal uintptr) uintptr {
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return ordinal & 0xffff
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}
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func IMAGE_SNAP_BY_ORDINAL(ordinal uintptr) bool {
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return (ordinal & IMAGE_ORDINAL_FLAG) != 0
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}
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// Thread Local Storage
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type IMAGE_TLS_DIRECTORY struct {
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StartAddressOfRawData uintptr
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EndAddressOfRawData uintptr
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AddressOfIndex uintptr // PDWORD
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AddressOfCallbacks uintptr // PIMAGE_TLS_CALLBACK *;
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SizeOfZeroFill uint32
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Characteristics uint32
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}
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type IMAGE_IMPORT_DESCRIPTOR struct {
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characteristicsOrOriginalFirstThunk uint32 // 0 for terminating null import descriptor
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// RVA to original unbound IAT (PIMAGE_THUNK_DATA)
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TimeDateStamp uint32 // 0 if not bound,
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// -1 if bound, and real date\time stamp
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// in IMAGE_DIRECTORY_ENTRY_BOUND_IMPORT (new BIND)
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// O.W. date/time stamp of DLL bound to (Old BIND)
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ForwarderChain uint32 // -1 if no forwarders
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Name uint32
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FirstThunk uint32 // RVA to IAT (if bound this IAT has actual addresses)
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}
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func (imgimpdesc *IMAGE_IMPORT_DESCRIPTOR) Characteristics() uint32 {
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return imgimpdesc.characteristicsOrOriginalFirstThunk
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}
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func (imgimpdesc *IMAGE_IMPORT_DESCRIPTOR) OriginalFirstThunk() uint32 {
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return imgimpdesc.characteristicsOrOriginalFirstThunk
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}
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const (
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DLL_PROCESS_ATTACH = 1
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DLL_THREAD_ATTACH = 2
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DLL_THREAD_DETACH = 3
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DLL_PROCESS_DETACH = 0
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)
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//sys isBadReadPtr(addr uintptr, ucb uintptr) (ret bool) = kernel32.IsBadReadPtr
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type SYSTEM_INFO struct {
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ProcessorArchitecture uint16
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Reserved uint16
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PageSize uint32
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MinimumApplicationAddress uintptr
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MaximumApplicationAddress uintptr
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ActiveProcessorMask uintptr
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NumberOfProcessors uint32
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ProcessorType uint32
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AllocationGranularity uint32
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ProcessorLevel uint16
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ProcessorRevision uint16
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}
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