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wireguard-go/tun/wintun/memmod/syscall_windows.go
Jason A. Donenfeld 497ba95de7 memmod: do not use IsBadReadPtr 
It should be enough to check for the trailing zero name.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2021-03-08 21:04:09 -07:00

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/* 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 (
// 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
}
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
}
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