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 SYSTEM_DLL_INIT_BLOCK *pLdrSystemDllInitBlock DECLSPEC_HIDDEN;
  43
  44 struct object_attr64
  45 {
  46     OBJECT_ATTRIBUTES   attr;
  47     UNICODE_STRING      str;
  48     SECURITY_DESCRIPTOR sd;
  49 };
  50
  51 static inline void *get_rva( HMODULE module, DWORD va )
  52 {
  53     return (void *)((char *)module + va);
  54 }
  55
  56 /* cf. GetSystemWow64Directory2 */
  57 static inline const WCHAR *get_machine_wow64_dir( USHORT machine )
  58 {
  59     switch (machine)
  60     {
  61     case IMAGE_FILE_MACHINE_TARGET_HOST: return L"\\??\\C:\\windows\\system32";
  62     case IMAGE_FILE_MACHINE_I386:        return L"\\??\\C:\\windows\\syswow64";
  63     case IMAGE_FILE_MACHINE_ARMNT:       return L"\\??\\C:\\windows\\sysarm32";
  64     case IMAGE_FILE_MACHINE_AMD64:       return L"\\??\\C:\\windows\\sysx8664";
  65     case IMAGE_FILE_MACHINE_ARM64:       return L"\\??\\C:\\windows\\sysarm64";
  66     default: return NULL;
  67     }
  68 }
  69
  70 static inline ULONG get_ulong( UINT **args ) { return *(*args)++; }
  71 static inline HANDLE get_handle( UINT **args ) { return LongToHandle( *(*args)++ ); }
  72 static inline void *get_ptr( UINT **args ) { return ULongToPtr( *(*args)++ ); }
  73
  74 static inline ULONG64 get_ulong64( UINT **args )
  75 {
  76     ULONG64 ret;
  77
  78     *args = (UINT *)(((ULONG_PTR)*args + args_alignment - 1) & ~(args_alignment - 1));
  79     ret = *(ULONG64 *)*args;
  80     *args += 2;
  81     return ret;
  82 }
  83
  84 static inline ULONG_PTR get_zero_bits( ULONG_PTR zero_bits )
  85 {
  86     return zero_bits ? zero_bits : 0x7fffffff;
  87 }
  88
  89 static inline void **addr_32to64( void **addr, ULONG *addr32 )
  90 {
  91     if (!addr32) return NULL;
  92     *addr = ULongToPtr( *addr32 );
  93     return addr;
  94 }
  95
  96 static inline SIZE_T *size_32to64( SIZE_T *size, ULONG *size32 )
  97 {
  98     if (!size32) return NULL;
  99     *size = *size32;
 100     return size;
 101 }
 102
 103 static inline void *apc_32to64( ULONG func )
 104 {
 105     return func ? Wow64ApcRoutine : NULL;
 106 }
 107
 108 static inline void *apc_param_32to64( ULONG func, ULONG context )
 109 {
 110     if (!func) return ULongToPtr( context );
 111     return (void *)(ULONG_PTR)(((ULONG64)func << 32) | context);
 112 }
 113
 114 static inline IO_STATUS_BLOCK *iosb_32to64( IO_STATUS_BLOCK *io, IO_STATUS_BLOCK32 *io32 )
 115 {
 116     if (!io32) return NULL;
 117     io->Pointer = io32;
 118     return io;
 119 }
 120
 121 static inline UNICODE_STRING *unicode_str_32to64( UNICODE_STRING *str, const UNICODE_STRING32 *str32 )
 122 {
 123     if (!str32) return NULL;
 124     str->Length = str32->Length;
 125     str->MaximumLength = str32->MaximumLength;
 126     str->Buffer = ULongToPtr( str32->Buffer );
 127     return str;
 128 }
 129
 130 static inline CLIENT_ID *client_id_32to64( CLIENT_ID *id, const CLIENT_ID32 *id32 )
 131 {
 132     if (!id32) return NULL;
 133     id->UniqueProcess = LongToHandle( id32->UniqueProcess );
 134     id->UniqueThread = LongToHandle( id32->UniqueThread );
 135     return id;
 136 }
 137
 138 static inline SECURITY_DESCRIPTOR *secdesc_32to64( SECURITY_DESCRIPTOR *out, const SECURITY_DESCRIPTOR *in )
 139 {
 140     /* relative descr has the same layout for 32 and 64 */
 141     const SECURITY_DESCRIPTOR_RELATIVE *sd = (const SECURITY_DESCRIPTOR_RELATIVE *)in;
 142
 143     if (!in) return NULL;
 144     out->Revision = sd->Revision;
 145     out->Sbz1     = sd->Sbz1;
 146     out->Control  = sd->Control & ~SE_SELF_RELATIVE;
 147     if (sd->Control & SE_SELF_RELATIVE)
 148     {
 149         out->Owner = sd->Owner ? (PSID)((BYTE *)sd + sd->Owner) : NULL;
 150         out->Group = sd->Group ? (PSID)((BYTE *)sd + sd->Group) : NULL;
 151         out->Sacl = ((sd->Control & SE_SACL_PRESENT) && sd->Sacl) ? (PSID)((BYTE *)sd + sd->Sacl) : NULL;
 152         out->Dacl = ((sd->Control & SE_DACL_PRESENT) && sd->Dacl) ? (PSID)((BYTE *)sd + sd->Dacl) : NULL;
 153     }
 154     else
 155     {
 156         out->Owner = ULongToPtr( sd->Owner );
 157         out->Group = ULongToPtr( sd->Group );
 158         out->Sacl = (sd->Control & SE_SACL_PRESENT) ? ULongToPtr( sd->Sacl ) : NULL;
 159         out->Dacl = (sd->Control & SE_DACL_PRESENT) ? ULongToPtr( sd->Dacl ) : NULL;
 160     }
 161     return out;
 162 }
 163
 164 static inline OBJECT_ATTRIBUTES *objattr_32to64( struct object_attr64 *out, const OBJECT_ATTRIBUTES32 *in )
 165 {
 166     memset( out, 0, sizeof(*out) );
 167     if (!in) return NULL;
 168     if (in->Length != sizeof(*in)) return &out->attr;
 169
 170     out->attr.Length = sizeof(out->attr);
 171     out->attr.RootDirectory = LongToHandle( in->RootDirectory );
 172     out->attr.Attributes = in->Attributes;
 173     out->attr.ObjectName = unicode_str_32to64( &out->str, ULongToPtr( in->ObjectName ));
 174     out->attr.SecurityQualityOfService = ULongToPtr( in->SecurityQualityOfService );
 175     out->attr.SecurityDescriptor = secdesc_32to64( &out->sd, ULongToPtr( in->SecurityDescriptor ));
 176     return &out->attr;
 177 }
 178
 179 static inline OBJECT_ATTRIBUTES *objattr_32to64_redirect( struct object_attr64 *out,
 180                                                           const OBJECT_ATTRIBUTES32 *in )
 181 {
 182     OBJECT_ATTRIBUTES *attr = objattr_32to64( out, in );
 183
 184     if (attr) get_file_redirect( attr );
 185     return attr;
 186 }
 187
 188 static inline void put_handle( ULONG *handle32, HANDLE handle )
 189 {
 190     *handle32 = HandleToULong( handle );
 191 }
 192
 193 static inline void put_addr( ULONG *addr32, void *addr )
 194 {
 195     if (addr32) *addr32 = PtrToUlong( addr );
 196 }
 197
 198 static inline void put_size( ULONG *size32, SIZE_T size )
 199 {
 200     if (size32) *size32 = min( size, MAXDWORD );
 201 }
 202
 203 static inline void put_client_id( CLIENT_ID32 *id32, const CLIENT_ID *id )
 204 {
 205     if (!id32) return;
 206     id32->UniqueProcess = HandleToLong( id->UniqueProcess );
 207     id32->UniqueThread = HandleToLong( id->UniqueThread );
 208 }
 209
 210 static inline void put_iosb( IO_STATUS_BLOCK32 *io32, const IO_STATUS_BLOCK *io )
 211 {
 212     /* sync I/O modifies the 64-bit iosb right away, so in that case we update the 32-bit one */
 213     /* async I/O leaves the 64-bit one untouched and updates the 32-bit one directly later on */
 214     if (io32 && io->Pointer != io32)
 215     {
 216         io32->Status = io->Status;
 217         io32->Information = io->Information;
 218     }
 219 }
 220
 221 extern void put_section_image_info( SECTION_IMAGE_INFORMATION32 *info32,
 222                                     const SECTION_IMAGE_INFORMATION *info ) DECLSPEC_HIDDEN;
 223 extern void put_vm_counters( VM_COUNTERS_EX32 *info32, const VM_COUNTERS_EX *info,
 224                              ULONG size ) DECLSPEC_HIDDEN;
 225
 226 #endif /* __WOW64_PRIVATE_H */