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