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/*
ChibiOS/RT - Copyright (C) 2006-2007 Giovanni Di Sirio.
This file is part of ChibiOS/RT.
ChibiOS/RT is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
ChibiOS/RT is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @addtogroup WIN32SIM_CORE
* @{
*/
#include <ch.h>
/*
* This file is a template of the system driver functions provided by a port.
* Some of the following functions may be implemented as macros in chcore.h if
* the implementer decides that there is an advantage in doing so, as example
* because performance concerns.
*/
/**
* Prints a message on the system console.
* @param msg pointer to the message
* @note The function is declared as a weak symbol, it is possible to redefine
* it in your application code.
*/
__attribute__((weak))
void sys_puts(char *msg) {
}
/**
* Performs a context switch between two threads.
* @param otp the thread to be switched out
* @param ntp the thread to be switched in
* @note The function is declared as a weak symbol, it is possible to redefine
* it in your application code.
*/
__attribute__((naked, weak))
void sys_switch(Thread *otp, Thread *ntp) {
register struct intctx *esp asm("esp");
asm volatile ("push %ebp \n\t" \
"push %esi \n\t" \
"push %edi \n\t" \
"push %ebx");
otp->p_ctx.esp = esp;
esp = ntp->p_ctx.esp;
asm volatile ("pop %ebx \n\t" \
"pop %edi \n\t" \
"pop %esi \n\t" \
"pop %ebp \n\t" \
"ret" : : "r" (esp));
}
/**
* Halts the system. In this implementation it just exits the simulation.
* @note The function is declared as a weak symbol, it is possible to redefine
* it in your application code.
*/
__attribute__((weak))
void sys_halt(void) {
exit(2);
}
/**
* Threads return point, it just invokes @p chThdExit().
* @note The function is declared as a weak symbol, it is possible to redefine
* it in your application code.
*/
__attribute__((naked, weak))
void threadexit(void) {
asm volatile ("push %eax \n\t" \
"call _chThdExit");
}
}
/** @} */
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