dlls/wow64win/wow64win_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 __WOW64WIN_PRIVATE_H
  22 #define __WOW64WIN_PRIVATE_H
  23
  24 #include "syscall.h"
  25
  26 #define SYSCALL_ENTRY(func) extern NTSTATUS WINAPI wow64_ ## func( UINT *args ) DECLSPEC_HIDDEN;
  27 ALL_WIN32_SYSCALLS
  28 #undef SYSCALL_ENTRY
  29
  30 void * WINAPI Wow64AllocateTemp( SIZE_T size );
  31
  32 struct object_attr64
  33 {
  34     OBJECT_ATTRIBUTES   attr;
  35     UNICODE_STRING      str;
  36     SECURITY_DESCRIPTOR sd;
  37 };
  38
  39 typedef struct
  40 {
  41     ULONG Length;
  42     ULONG RootDirectory;
  43     ULONG ObjectName;
  44     ULONG Attributes;
  45     ULONG SecurityDescriptor;
  46     ULONG SecurityQualityOfService;
  47 } OBJECT_ATTRIBUTES32;
  48
  49 static inline ULONG get_ulong( UINT **args ) { return *(*args)++; }
  50 static inline HANDLE get_handle( UINT **args ) { return LongToHandle( *(*args)++ ); }
  51 static inline void *get_ptr( UINT **args ) { return ULongToPtr( *(*args)++ ); }
  52
  53 static inline void **addr_32to64( void **addr, ULONG *addr32 )
  54 {
  55     if (!addr32) return NULL;
  56     *addr = ULongToPtr( *addr32 );
  57     return addr;
  58 }
  59
  60 static inline SIZE_T *size_32to64( SIZE_T *size, ULONG *size32 )
  61 {
  62     if (!size32) return NULL;
  63     *size = *size32;
  64     return size;
  65 }
  66
  67 static inline void put_addr( ULONG *addr32, void *addr )
  68 {
  69     if (addr32) *addr32 = PtrToUlong( addr );
  70 }
  71
  72 static inline void put_size( ULONG *size32, SIZE_T size )
  73 {
  74     if (size32) *size32 = min( size, MAXDWORD );
  75 }
  76
  77 static inline UNICODE_STRING *unicode_str_32to64( UNICODE_STRING *str, const UNICODE_STRING32 *str32 )
  78 {
  79     if (!str32) return NULL;
  80     str->Length = str32->Length;
  81     str->MaximumLength = str32->MaximumLength;
  82     str->Buffer = ULongToPtr( str32->Buffer );
  83     return str;
  84 }
  85
  86 static inline SECURITY_DESCRIPTOR *secdesc_32to64( SECURITY_DESCRIPTOR *out, const SECURITY_DESCRIPTOR *in )
  87 {
  88     /* relative descr has the same layout for 32 and 64 */
  89     const SECURITY_DESCRIPTOR_RELATIVE *sd = (const SECURITY_DESCRIPTOR_RELATIVE *)in;
  90
  91     if (!in) return NULL;
  92     out->Revision = sd->Revision;
  93     out->Sbz1     = sd->Sbz1;
  94     out->Control  = sd->Control & ~SE_SELF_RELATIVE;
  95     if (sd->Control & SE_SELF_RELATIVE)
  96     {
  97         if (sd->Owner) out->Owner = (PSID)((BYTE *)sd + sd->Owner);
  98         if (sd->Group) out->Group = (PSID)((BYTE *)sd + sd->Group);
  99         if ((sd->Control & SE_SACL_PRESENT) && sd->Sacl) out->Sacl = (PSID)((BYTE *)sd + sd->Sacl);
 100         if ((sd->Control & SE_DACL_PRESENT) && sd->Dacl) out->Dacl = (PSID)((BYTE *)sd + sd->Dacl);
 101     }
 102     else
 103     {
 104         out->Owner = ULongToPtr( sd->Owner );
 105         out->Group = ULongToPtr( sd->Group );
 106         if (sd->Control & SE_SACL_PRESENT) out->Sacl = ULongToPtr( sd->Sacl );
 107         if (sd->Control & SE_DACL_PRESENT) out->Dacl = ULongToPtr( sd->Dacl );
 108     }
 109     return out;
 110 }
 111
 112 static inline OBJECT_ATTRIBUTES *objattr_32to64( struct object_attr64 *out, const OBJECT_ATTRIBUTES32 *in )
 113 {
 114     memset( out, 0, sizeof(*out) );
 115     if (!in) return NULL;
 116     if (in->Length != sizeof(*in)) return &out->attr;
 117
 118     out->attr.Length = sizeof(out->attr);
 119     out->attr.RootDirectory = LongToHandle( in->RootDirectory );
 120     out->attr.Attributes = in->Attributes;
 121     out->attr.ObjectName = unicode_str_32to64( &out->str, ULongToPtr( in->ObjectName ));
 122     out->attr.SecurityQualityOfService = ULongToPtr( in->SecurityQualityOfService );
 123     out->attr.SecurityDescriptor = secdesc_32to64( &out->sd, ULongToPtr( in->SecurityDescriptor ));
 124     return &out->attr;
 125 }
 126
 127 static inline void set_last_error32( DWORD err )
 128 {
 129     TEB *teb = NtCurrentTeb();
 130     TEB32 *teb32 = (TEB32 *)((char *)teb + teb->WowTebOffset);
 131     teb32->LastErrorValue = err;
 132 }
 133
 134 #endif /* __WOW64WIN_PRIVATE_H */