/*
* Copyright (c) 2008 Josef Cejka
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/** @addtogroup ia32
* @{
*/
/** @file
*/
#ifndef KERN_ia32_CONTEXT_OFFSET_H_
#define KERN_ia32_CONTEXT_OFFSET_H_
#define OFFSET_SP 0x0
#define OFFSET_PC 0x4
#define OFFSET_EBX 0x8
#define OFFSET_ESI 0xC
#define OFFSET_EDI 0x10
#define OFFSET_EBP 0x14
#ifdef KERNEL
# define OFFSET_IPL 0x18
#else
# define OFFSET_TLS 0x18
#endif
#ifdef __ASM__
# ctx: address of the structure with saved context
# pc: return address
.macro CONTEXT_SAVE_ARCH_CORE ctx:req pc:req
movl %esp,OFFSET_SP(\ctx) # %esp -> ctx->sp
movl \pc,OFFSET_PC(\ctx) # %eip -> ctx->pc
movl %ebx,OFFSET_EBX(\ctx) # %ebx -> ctx->ebx
movl %esi,OFFSET_ESI(\ctx) # %esi -> ctx->esi
movl %edi,OFFSET_EDI(\ctx) # %edi -> ctx->edi
movl %ebp,OFFSET_EBP(\ctx) # %ebp -> ctx->ebp
.endm
# ctx: address of the structure with saved context
.macro CONTEXT_RESTORE_ARCH_CORE ctx:req pc:req
movl OFFSET_SP(\ctx),%esp # ctx->sp -> %esp
movl OFFSET_PC(\ctx),\pc # ctx->pc -> \pc
movl OFFSET_EBX(\ctx),%ebx # ctx->ebx -> %ebx
movl OFFSET_ESI(\ctx),%esi # ctx->esi -> %esi
movl OFFSET_EDI(\ctx),%edi # ctx->edi -> %edi
movl OFFSET_EBP(\ctx),%ebp # ctx->ebp -> %ebp
.endm
#endif /* __ASM__ */
#endif
/** @}
*/