dlls/wow64/wow64_private.h

   1 /*
   2  * WoW64 private definitions
   3  *
   4  * Copyright 2021 Alexandre Julliard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #ifndef __WOW64_PRIVATE_H
  22 #define __WOW64_PRIVATE_H
  23
  24 #include "syscall.h"
  25 #include "struct32.h"
  26
  27 #define SYSCALL_ENTRY(func) extern NTSTATUS WINAPI wow64_ ## func( UINT *args ) DECLSPEC_HIDDEN;
  28 ALL_SYSCALLS
  29 #undef SYSCALL_ENTRY
  30
  31 void * WINAPI Wow64AllocateTemp( SIZE_T size );
  32 void   WINAPI Wow64ApcRoutine( ULONG_PTR arg1, ULONG_PTR arg2, ULONG_PTR arg3, CONTEXT *context );
  33 void   WINAPI Wow64PassExceptionToGuest( EXCEPTION_POINTERS *ptrs );
  34
  35 extern void init_image_mapping( HMODULE module ) DECLSPEC_HIDDEN;
  36 extern void init_file_redirects(void) DECLSPEC_HIDDEN;
  37 extern BOOL get_file_redirect( OBJECT_ATTRIBUTES *attr ) DECLSPEC_HIDDEN;
  38
  39 extern USHORT native_machine DECLSPEC_HIDDEN;
  40 extern USHORT current_machine DECLSPEC_HIDDEN;
  41 extern ULONG_PTR args_alignment DECLSPEC_HIDDEN;
  42 extern ULONG_PTR highest_user_address DECLSPEC_HIDDEN;
  43 extern ULONG_PTR default_zero_bits DECLSPEC_HIDDEN;
  44 extern SYSTEM_DLL_INIT_BLOCK *pLdrSystemDllInitBlock DECLSPEC_HIDDEN;
  45
  46 struct object_attr64
  47 {
  48     OBJECT_ATTRIBUTES   attr;
  49     UNICODE_STRING      str;
  50     SECURITY_DESCRIPTOR sd;
  51 };
  52
  53 static inline void *get_rva( HMODULE module, DWORD va )
  54 {
  55     return (void *)((char *)module + va);
  56 }
  57
  58 /* cf. GetSystemWow64Directory2 */
  59 static inline const WCHAR *get_machine_wow64_dir( USHORT machine )
  60 {
  61     switch (machine)
  62     {
  63     case IMAGE_FILE_MACHINE_TARGET_HOST: return L"\\??\\C:\\windows\\system32";
  64     case IMAGE_FILE_MACHINE_I386:        return L"\\??\\C:\\windows\\syswow64";
  65     case IMAGE_FILE_MACHINE_ARMNT:       return L"\\??\\C:\\windows\\sysarm32";
  66     case IMAGE_FILE_MACHINE_AMD64:       return L"\\??\\C:\\windows\\sysx8664";
  67     case IMAGE_FILE_MACHINE_ARM64:       return L"\\??\\C:\\windows\\sysarm64";
  68     default: return NULL;
  69     }
  70 }
  71
  72 static inline ULONG get_ulong( UINT **args ) { return *(*args)++; }
  73 static inline HANDLE get_handle( UINT **args ) { return LongToHandle( *(*args)++ ); }
  74 static inline void *get_ptr( UINT **args ) { return ULongToPtr( *(*args)++ ); }
  75
  76 static inline ULONG64 get_ulong64( UINT **args )
  77 {
  78     ULONG64 ret;
  79
  80     *args = (UINT *)(((ULONG_PTR)*args + args_alignment - 1) & ~(args_alignment - 1));
  81     ret = *(ULONG64 *)*args;
  82     *args += 2;
  83     return ret;
  84 }
  85
  86 static inline ULONG_PTR get_zero_bits( ULONG_PTR zero_bits )
  87 {
  88     return zero_bits ? zero_bits : default_zero_bits;
  89 }
  90
  91 static inline void **addr_32to64( void **addr, ULONG *addr32 )
  92 {
  93     if (!addr32) return NULL;
  94     *addr = ULongToPtr( *addr32 );
  95     return addr;
  96 }
  97
  98 static inline SIZE_T *size_32to64( SIZE_T *size, ULONG *size32 )
  99 {
 100     if (!size32) return NULL;
 101     *size = *size32;
 102     return size;
 103 }
 104
 105 static inline void *apc_32to64( ULONG func )
 106 {
 107     return func ? Wow64ApcRoutine : NULL;
 108 }
 109
 110 static inline void *apc_param_32to64( ULONG func, ULONG context )
 111 {
 112     if (!func) return ULongToPtr( context );
 113     return (void *)(ULONG_PTR)(((ULONG64)func << 32) | context);
 114 }
 115
 116 static inline IO_STATUS_BLOCK *iosb_32to64( IO_STATUS_BLOCK *io, IO_STATUS_BLOCK32 *io32 )
 117 {
 118     if (!io32) return NULL;
 119     io->Pointer = io32;
 120     return io;
 121 }
 122
 123 static inline UNICODE_STRING *unicode_str_32to64( UNICODE_STRING *str, const UNICODE_STRING32 *str32 )
 124 {
 125     if (!str32) return NULL;
 126     str->Length = str32->Length;
 127     str->MaximumLength = str32->MaximumLength;
 128     str->Buffer = ULongToPtr( str32->Buffer );
 129     return str;
 130 }
 131
 132 static inline CLIENT_ID *client_id_32to64( CLIENT_ID *id, const CLIENT_ID32 *id32 )
 133 {
 134     if (!id32) return NULL;
 135     id->UniqueProcess = LongToHandle( id32->UniqueProcess );
 136     id->UniqueThread = LongToHandle( id32->UniqueThread );
 137     return id;
 138 }
 139
 140 static inline SECURITY_DESCRIPTOR *secdesc_32to64( SECURITY_DESCRIPTOR *out, const SECURITY_DESCRIPTOR *in )
 141 {
 142     /* relative descr has the same layout for 32 and 64 */
 143     const SECURITY_DESCRIPTOR_RELATIVE *sd = (const SECURITY_DESCRIPTOR_RELATIVE *)in;
 144
 145     if (!in) return NULL;
 146     out->Revision = sd->Revision;
 147     out->Sbz1     = sd->Sbz1;
 148     out->Control  = sd->Control & ~SE_SELF_RELATIVE;
 149     if (sd->Control & SE_SELF_RELATIVE)
 150     {
 151         out->Owner = sd->Owner ? (PSID)((BYTE *)sd + sd->Owner) : NULL;
 152         out->Group = sd->Group ? (PSID)((BYTE *)sd + sd->Group) : NULL;
 153         out->Sacl = ((sd->Control & SE_SACL_PRESENT) && sd->Sacl) ? (PSID)((BYTE *)sd + sd->Sacl) : NULL;
 154         out->Dacl = ((sd->Control & SE_DACL_PRESENT) && sd->Dacl) ? (PSID)((BYTE *)sd + sd->Dacl) : NULL;
 155     }
 156     else
 157     {
 158         out->Owner = ULongToPtr( sd->Owner );
 159         out->Group = ULongToPtr( sd->Group );
 160         out->Sacl = (sd->Control & SE_SACL_PRESENT) ? ULongToPtr( sd->Sacl ) : NULL;
 161         out->Dacl = (sd->Control & SE_DACL_PRESENT) ? ULongToPtr( sd->Dacl ) : NULL;
 162     }
 163     return out;
 164 }
 165
 166 static inline OBJECT_ATTRIBUTES *objattr_32to64( struct object_attr64 *out, const OBJECT_ATTRIBUTES32 *in )
 167 {
 168     memset( out, 0, sizeof(*out) );
 169     if (!in) return NULL;
 170     if (in->Length != sizeof(*in)) return &out->attr;
 171
 172     out->attr.Length = sizeof(out->attr);
 173     out->attr.RootDirectory = LongToHandle( in->RootDirectory );
 174     out->attr.Attributes = in->Attributes;
 175     out->attr.ObjectName = unicode_str_32to64( &out->str, ULongToPtr( in->ObjectName ));
 176     out->attr.SecurityQualityOfService = ULongToPtr( in->SecurityQualityOfService );
 177     out->attr.SecurityDescriptor = secdesc_32to64( &out->sd, ULongToPtr( in->SecurityDescriptor ));
 178     return &out->attr;
 179 }
 180
 181 static inline OBJECT_ATTRIBUTES *objattr_32to64_redirect( struct object_attr64 *out,
 182                                                           const OBJECT_ATTRIBUTES32 *in )
 183 {
 184     OBJECT_ATTRIBUTES *attr = objattr_32to64( out, in );
 185
 186     if (attr) get_file_redirect( attr );
 187     return attr;
 188 }
 189
 190 static inline void put_handle( ULONG *handle32, HANDLE handle )
 191 {
 192     *handle32 = HandleToULong( handle );
 193 }
 194
 195 static inline void put_addr( ULONG *addr32, void *addr )
 196 {
 197     if (addr32) *addr32 = PtrToUlong( addr );
 198 }
 199
 200 static inline void put_size( ULONG *size32, SIZE_T size )
 201 {
 202     if (size32) *size32 = min( size, MAXDWORD );
 203 }
 204
 205 static inline void put_client_id( CLIENT_ID32 *id32, const CLIENT_ID *id )
 206 {
 207     if (!id32) return;
 208     id32->UniqueProcess = HandleToLong( id->UniqueProcess );
 209     id32->UniqueThread = HandleToLong( id->UniqueThread );
 210 }
 211
 212 static inline void put_iosb( IO_STATUS_BLOCK32 *io32, const IO_STATUS_BLOCK *io )
 213 {
 214     /* sync I/O modifies the 64-bit iosb right away, so in that case we update the 32-bit one */
 215     /* async I/O leaves the 64-bit one untouched and updates the 32-bit one directly later on */
 216     if (io32 && io->Pointer != io32)
 217     {
 218         io32->Status = io->Status;
 219         io32->Information = io->Information;
 220     }
 221 }
 222
 223 extern void put_section_image_info( SECTION_IMAGE_INFORMATION32 *info32,
 224                                     const SECTION_IMAGE_INFORMATION *info ) DECLSPEC_HIDDEN;
 225 extern void put_vm_counters( VM_COUNTERS_EX32 *info32, const VM_COUNTERS_EX *info,
 226                              ULONG size ) DECLSPEC_HIDDEN;
 227
 228 #endif /* __WOW64_PRIVATE_H */