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