85 lines
2.8 KiB
C
85 lines
2.8 KiB
C
/*
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ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010 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 SIMIA32_CORE
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* @{
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*/
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#include <stdlib.h>
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#include "ch.h"
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#include "hal.h"
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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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*/
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__attribute__((used))
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static void __dummy(Thread *ntp, Thread *otp) {
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(void)ntp; (void)otp;
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#if defined(WIN32)
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asm volatile (".globl @port_switch@8 \n\t" \
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"@port_switch@8:");
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#elif defined(__APPLE__)
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asm volatile (".globl _port_switch \n\t" \
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"_port_switch:");
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#else
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asm volatile (".globl port_switch \n\t" \
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"port_switch:");
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#endif
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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 \n\t" \
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"movl %esp, 12(%edx) \n\t" \
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"movl 12(%ecx), %esp \n\t" \
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"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");
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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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*/
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__attribute__((fastcall))
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void port_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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*/
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void threadexit(void) {
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#if defined(WIN32) || defined (__APPLE__)
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asm volatile ("push %eax \n\t" \
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"call _chThdExit");
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#else
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asm volatile ("push %eax \n\t" \
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"call chThdExit");
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#endif
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}
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/** @} */
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