93 lines
3.0 KiB
C
93 lines
3.0 KiB
C
/*
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ChibiOS/RT - Copyright (C) 2006-2007 Giovanni Di Sirio.
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This file is part of ChibiOS/RT.
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ChibiOS/RT is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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ChibiOS/RT 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @addtogroup WIN32SIM_CORE
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* @{
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*/
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#include <ch.h>
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/*
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* This file is a template of the system driver functions provided by a port.
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* Some of the following functions may be implemented as macros in chcore.h if
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* the implementer decides that there is an advantage in doing so, as example
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* because performance concerns.
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*/
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/**
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* Prints a message on the system console.
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* @param msg pointer to the message
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* @note The function is declared as a weak symbol, it is possible to redefine
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* it in your application code.
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*/
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__attribute__((weak))
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void sys_puts(char *msg) {
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}
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/**
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* Performs a context switch between two threads.
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* @param otp the thread to be switched out
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* @param ntp the thread to be switched in
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* @note The function is declared as a weak symbol, it is possible to redefine
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* it in your application code.
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*/
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__attribute__((naked, weak))
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void sys_switch(Thread *otp, Thread *ntp) {
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register struct intctx *esp asm("esp");
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asm volatile ("push %ebp \n\t" \
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"push %esi \n\t" \
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"push %edi \n\t" \
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"push %ebx");
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otp->p_ctx.esp = esp;
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esp = ntp->p_ctx.esp;
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asm volatile ("pop %ebx \n\t" \
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"pop %edi \n\t" \
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"pop %esi \n\t" \
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"pop %ebp \n\t" \
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"ret" : : "r" (esp));
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}
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/**
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* Halts the system. In this implementation it just exits the simulation.
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* @note The function is declared as a weak symbol, it is possible to redefine
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* it in your application code.
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*/
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__attribute__((weak))
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void sys_halt(void) {
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exit(2);
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}
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/**
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* Threads return point, it just invokes @p chThdExit().
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* @note The function is declared as a weak symbol, it is possible to redefine
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* it in your application code.
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*/
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__attribute__((naked, weak))
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void threadexit(void) {
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asm volatile ("push %eax \n\t" \
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"call _chThdExit");
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}
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}
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/** @} */
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