blob: 3b382b957c088fd929ec6ddd503ec50bfebf7a80 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
|
/*
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 SIMIA32_CORE
* @{
*/
#include <stdlib.h>
#include "ch.h"
#include "hal.h"
/**
* Performs a context switch between two threads.
* @param otp the thread to be switched out
* @param ntp the thread to be switched in
*/
__attribute__((used))
static void __dummy(Thread *otp, Thread *ntp) {
(void)otp; (void)ntp;
#if defined(WIN32)
asm volatile (".globl @port_switch@8 \n\t" \
"@port_switch@8:");
#elif defined(__APPLE__)
asm volatile (".globl _port_switch \n\t" \
"_port_switch:");
#else
asm volatile (".globl port_switch \n\t" \
"port_switch:");
#endif
asm volatile ("push %ebp \n\t" \
"push %esi \n\t" \
"push %edi \n\t" \
"push %ebx \n\t" \
"movl %esp, 12(%ecx) \n\t" \
"movl 12(%edx), %esp \n\t" \
"pop %ebx \n\t" \
"pop %edi \n\t" \
"pop %esi \n\t" \
"pop %ebp \n\t" \
"ret");
}
/**
* Halts the system. In this implementation it just exits the simulation.
*/
__attribute__((fastcall))
void port_halt(void) {
exit(2);
}
/**
* Threads return point, it just invokes @p chThdExit().
*/
void threadexit(void) {
#if defined(WIN32) || defined (__APPLE__)
asm volatile ("push %eax \n\t" \
"call _chThdExit");
#else
asm volatile ("push %eax \n\t" \
"call chThdExit");
#endif
}
/** @} */
|
