server/context_x86_64.c

   1 /*
   2  * x86-64 register context support
   3  *
   4  * Copyright (C) 1999, 2005 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 __x86_64__
  24
  25 #include <assert.h>
  26 #include <errno.h>
  27 #include <stdarg.h>
  28 #include <unistd.h>
  29
  30 #define NONAMELESSUNION
  31 #include "windef.h"
  32 #include "winbase.h"
  33
  34 #include "file.h"
  35 #include "thread.h"
  36 #include "request.h"
  37
  38 /* copy a context structure according to the flags */
  39 void copy_context( CONTEXT *to, const CONTEXT *from, unsigned int flags )
  40 {
  41     flags &= ~CONTEXT_AMD64;  /* get rid of CPU id */
  42     if (flags & CONTEXT_CONTROL)
  43     {
  44         to->Rbp    = from->Rbp;
  45         to->Rip    = from->Rip;
  46         to->Rsp    = from->Rsp;
  47         to->SegCs  = from->SegCs;
  48         to->SegSs  = from->SegSs;
  49         to->EFlags = from->EFlags;
  50         to->MxCsr  = from->MxCsr;
  51     }
  52     if (flags & CONTEXT_INTEGER)
  53     {
  54         to->Rax = from->Rax;
  55         to->Rcx = from->Rcx;
  56         to->Rdx = from->Rdx;
  57         to->Rbx = from->Rbx;
  58         to->Rsi = from->Rsi;
  59         to->Rdi = from->Rdi;
  60         to->R8  = from->R8;
  61         to->R9  = from->R9;
  62         to->R10 = from->R10;
  63         to->R11 = from->R11;
  64         to->R12 = from->R12;
  65         to->R13 = from->R13;
  66         to->R14 = from->R14;
  67         to->R15 = from->R15;
  68     }
  69     if (flags & CONTEXT_SEGMENTS)
  70     {
  71         to->SegDs = from->SegDs;
  72         to->SegEs = from->SegEs;
  73         to->SegFs = from->SegFs;
  74         to->SegGs = from->SegGs;
  75     }
  76     if (flags & CONTEXT_FLOATING_POINT)
  77     {
  78         to->u.FltSave = from->u.FltSave;
  79     }
  80     /* we don't bother copying the debug registers, since they */
  81     /* always need to be accessed by ptrace anyway */
  82     to->ContextFlags |= flags & ~CONTEXT_DEBUG_REGISTERS;
  83 }
  84
  85 /* retrieve the current instruction pointer of a context */
  86 void *get_context_ip( const CONTEXT *context )
  87 {
  88     return (void *)context->Rip;
  89 }
  90
  91 /* return the context flag that contains the CPU id */
  92 unsigned int get_context_cpu_flag(void)
  93 {
  94     return CONTEXT_AMD64;
  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_AMD64);
 102 }
 103
 104 #endif  /* __x86_64__ */