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/*
* i386 register context support
*
* Copyright (C) 1999 Alexandre Julliard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "config.h"
#ifdef __i386__
#include <assert.h>
#include <errno.h>
#include <stdarg.h>
#include <unistd.h>
#include "windef.h"
#include "file.h"
#include "thread.h"
#include "request.h"
/* copy a context structure according to the flags */
void copy_context( CONTEXT *to, const CONTEXT *from, unsigned int flags )
{
flags &= ~CONTEXT_i386; /* get rid of CPU id */
if (flags & CONTEXT_CONTROL)
{
to->Ebp = from->Ebp;
to->Eip = from->Eip;
to->Esp = from->Esp;
to->SegCs = from->SegCs;
to->SegSs = from->SegSs;
to->EFlags = from->EFlags;
}
if (flags & CONTEXT_INTEGER)
{
to->Eax = from->Eax;
to->Ebx = from->Ebx;
to->Ecx = from->Ecx;
to->Edx = from->Edx;
to->Esi = from->Esi;
to->Edi = from->Edi;
}
if (flags & CONTEXT_SEGMENTS)
{
to->SegDs = from->SegDs;
to->SegEs = from->SegEs;
to->SegFs = from->SegFs;
to->SegGs = from->SegGs;
}
if (flags & CONTEXT_FLOATING_POINT)
{
to->FloatSave = from->FloatSave;
}
if (flags & CONTEXT_EXTENDED_REGISTERS)
{
memcpy( to->ExtendedRegisters, from->ExtendedRegisters, sizeof(to->ExtendedRegisters) );
}
if (flags & CONTEXT_DEBUG_REGISTERS)
{
to->Dr0 = from->Dr0;
to->Dr1 = from->Dr1;
to->Dr2 = from->Dr2;
to->Dr3 = from->Dr3;
to->Dr6 = from->Dr6;
to->Dr7 = from->Dr7;
}
to->ContextFlags |= flags;
}
/* retrieve the current instruction pointer of a context */
void *get_context_ip( const CONTEXT *context )
{
return (void *)context->Eip;
}
/* return the context flag that contains the CPU id */
unsigned int get_context_cpu_flag(void)
{
return CONTEXT_i386;
}
/* return only the context flags that correspond to system regs */
/* (system regs are the ones we can't access on the client side) */
unsigned int get_context_system_regs( unsigned int flags )
{
return flags & (CONTEXT_DEBUG_REGISTERS & ~CONTEXT_i386);
}
#endif /* __i386__ */
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