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  1. /*
  2.  * Copyright (C) 2005 Ondrej Palkovsky
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. #ifndef __amd64_CONTEXT_H__
  30. #define __amd64_CONTEXT_H__
  31.  
  32. #ifndef __amd64_TYPES_H__
  33. #  include <arch/types.h>
  34. #endif
  35.  
  36.  
  37. /* According to ABI the stack MUST be aligned on
  38.  * 16-byte boundary. If it is not, the va_arg calling will
  39.  * panic sooner or later
  40.  */
  41. #define SP_DELTA     16
  42.  
  43. /* We include only registers that must be preserved
  44.  * during function call
  45.  */
  46. struct context {
  47.     __address sp;
  48.     __address pc;
  49.    
  50.     __u64 rbx;
  51.     __u64 rbp;
  52.  
  53.     __u64 r12;
  54.     __u64 r13;
  55.     __u64 r14;
  56.     __u64 r15;
  57.  
  58.     ipl_t ipl;
  59. } __attribute__ ((packed));
  60.  
  61. /** This is passed to interrupt handlers */
  62. struct interrupt_context {
  63.     __u64 rax;
  64.     __u64 rbx;
  65.     __u64 rcx;
  66.     __u64 rdx;
  67.     __u64 rsi;
  68.     __u64 rdi;
  69.     __u64 r8;
  70.     __u64 r9;
  71.     __u64 r10;
  72.     __u64 r11;
  73.     __u64 r12;
  74.     __u64 r13;
  75.     __u64 r14;
  76.     __u64 r15;
  77.     /* These 2 items MUST be last parts of the structure */
  78.     __u64 rbp;
  79.     __u64 stack[0]; /* Additional data on stack */
  80. } __attribute__ ((packed));
  81.  
  82. #endif
  83.