server/context_i386.c

   1 /*
   2  * i386 register context support
   3  *
   4  * Copyright (C) 1999 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 #include "config.h"
  22
  23 #ifdef __i386__
  24
  25 #include <assert.h>
  26 #include <errno.h>
  27 #include <stdarg.h>
  28 #include <unistd.h>
  29
  30 #include "windef.h"
  31
  32 #include "file.h"
  33 #include "thread.h"
  34 #include "request.h"
  35
  36 /* copy a context structure according to the flags */
  37 void copy_context( CONTEXT *to, const CONTEXT *from, unsigned int flags )
  38 {
  39     flags &= ~CONTEXT_i386;  /* get rid of CPU id */
  40     if (flags & CONTEXT_CONTROL)
  41     {
  42         to->Ebp    = from->Ebp;
  43         to->Eip    = from->Eip;
  44         to->Esp    = from->Esp;
  45         to->SegCs  = from->SegCs;
  46         to->SegSs  = from->SegSs;
  47         to->EFlags = from->EFlags;
  48     }
  49     if (flags & CONTEXT_INTEGER)
  50     {
  51         to->Eax = from->Eax;
  52         to->Ebx = from->Ebx;
  53         to->Ecx = from->Ecx;
  54         to->Edx = from->Edx;
  55         to->Esi = from->Esi;
  56         to->Edi = from->Edi;
  57     }
  58     if (flags & CONTEXT_SEGMENTS)
  59     {
  60         to->SegDs = from->SegDs;
  61         to->SegEs = from->SegEs;
  62         to->SegFs = from->SegFs;
  63         to->SegGs = from->SegGs;
  64     }
  65     if (flags & CONTEXT_FLOATING_POINT)
  66     {
  67         to->FloatSave = from->FloatSave;
  68     }
  69     if (flags & CONTEXT_EXTENDED_REGISTERS)
  70     {
  71         memcpy( to->ExtendedRegisters, from->ExtendedRegisters, sizeof(to->ExtendedRegisters) );
  72     }
  73     if (flags & CONTEXT_DEBUG_REGISTERS)
  74     {
  75         to->Dr0 = from->Dr0;
  76         to->Dr1 = from->Dr1;
  77         to->Dr2 = from->Dr2;
  78         to->Dr3 = from->Dr3;
  79         to->Dr6 = from->Dr6;
  80         to->Dr7 = from->Dr7;
  81     }
  82     to->ContextFlags |= flags;
  83 }
  84
  85 /* retrieve the current instruction pointer of a context */
  86 void *get_context_ip( const CONTEXT *context )
  87 {
  88     return (void *)context->Eip;
  89 }
  90
  91 /* return the context flag that contains the CPU id */
  92 unsigned int get_context_cpu_flag(void)
  93 {
  94     return CONTEXT_i386;
  95 }
  96
  97 /* return only the context flags that correspond to system regs */
  98 /* (system regs are the ones we can't access on the client side) */
  99 unsigned int get_context_system_regs( unsigned int flags )
 100 {
 101     return flags & (CONTEXT_DEBUG_REGISTERS & ~CONTEXT_i386);
 102 }
 103
 104 #endif  /* __i386__ */