0,0 → 1,89 |
/* |
* Copyright (c) 2001-2004 Jakub Jermar |
* 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 generic |
* @{ |
*/ |
/** @file |
*/ |
|
#ifndef KERN_CONTEXT_H_ |
#define KERN_CONTEXT_H_ |
|
#include <arch/types.h> |
#include <arch/context.h> |
|
|
#ifndef context_set |
#define context_set(c, _pc, stack, size) \ |
(c)->pc = (uintptr_t) (_pc); \ |
(c)->sp = ((uintptr_t) (stack)) + (size) - SP_DELTA; |
#endif /* context_set */ |
|
extern int context_save_arch(context_t *c) __attribute__ ((returns_twice)); |
extern void context_restore_arch(context_t *c) __attribute__ ((noreturn)); |
|
/** Save register context. |
* |
* Save current register context (including stack pointers) |
* to context structure. |
* |
* Note that call to context_restore() will return at the same |
* address as the corresponding call to context_save(). |
* |
* This MUST be a macro, gcc -O0 does not inline functions even |
* if they are marked inline and context_save_arch must be called |
* from level <= that when context_restore is called. |
* |
* @param c Context structure. |
* |
* @return context_save() returns 1, context_restore() returns 0. |
*/ |
#define context_save(c) context_save_arch(c) |
|
/** Restore register context. |
* |
* Restore previously saved register context (including stack pointers) |
* from context structure. |
* |
* Note that this function does not normally return. |
* Instead, it returns at the same address as the |
* corresponding call to context_save(), the only |
* difference being return value. |
* |
* @param c Context structure. |
*/ |
static inline void context_restore(context_t *c) |
{ |
context_restore_arch(c); |
} |
|
#endif |
|
/** @} |
*/ |