Mercurial > ~darius > hgwebdir.cgi > stm32temp

annotate syscalls.c @ 34:07589f738e5e

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Update to reflect reality (ish)
author Daniel O'Connor <darius@dons.net.au>
date Mon, 11 Mar 2013 19:51:34 +1030
parents d3b7d4964807
children 2ecde7a4bc55
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1 /*
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2 * syscalls.c
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3 *
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4 * Created on: 03.12.2009
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5 * Author: Martin Thomas, 3BSD license
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6 */
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7
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8 #include <stdio.h>
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9 #include <reent.h>
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10 #include <errno.h>
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11 #include <stdlib.h> /* abort */
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12 #include <sys/types.h>
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13 #include <sys/stat.h>
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14 #include <sys/time.h>
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15
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16 #include "comm.h"
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17 #include "rtc.h"
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18 #include "stm32f10x.h" /* for _get_PSP() from core_cm3.h*/
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19
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20 #undef errno
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21 extern int errno;
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22
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23 int
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24 _kill(int pid, int sig) {
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25 pid = pid; sig = sig; /* avoid warnings */
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26 errno = EINVAL;
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27 return -1;
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28 }
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29
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30 void
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31 _exit(int status) {
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32 printf("_exit called with parameter %d\r\n", status);
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33 __disable_irq();
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34 while(1)
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35 ;
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36 }
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37
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38 int
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39 _getpid(void) {
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40 return 1;
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41 }
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42
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43 extern char _end; /* Defined by the linker */
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44 static char *heap_end;
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45
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46 char *
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47 get_heap_end(void) {
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48 return (char*) heap_end;
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49 }
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50
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51 char *
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52 get_stack_top(void) {
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53 /* Use MSP (vs PSP) - the processor is in Thread mode out of reset */
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54 return (char*) __get_MSP();
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55 }
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56
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57 caddr_t
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58 _sbrk(int incr) {
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59 char *prev_heap_end;
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60
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61 if (heap_end == 0) {
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62 heap_end = &_end;
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63 }
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64 prev_heap_end = heap_end;
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65
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66 if (heap_end + incr > get_stack_top()) {
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67 printf("Heap and stack collision\r\n");
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68 abort();
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69 }
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70
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71 heap_end += incr;
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72 return (caddr_t) prev_heap_end;
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73 }
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74
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75 int
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76 _close(int file) {
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77 file = file; /* avoid warning */
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78 return -1;
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79 }
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80
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81 int
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82 _fstat(int file, struct stat *st) {
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83 file = file; /* avoid warning */
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84 st->st_mode = S_IFCHR;
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85 return 0;
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86 }
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87
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88 int
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89 _isatty(int file) {
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90 file = file; /* avoid warning */
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91 return 1;
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92 }
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93
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94 int
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95 _lseek(int file, int ptr, int dir) {
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96 file = file; /* avoid warning */
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97 ptr = ptr; /* avoid warning */
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98 dir = dir; /* avoid warning */
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99 return 0;
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100 }
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101
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102 int
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103 _read(int file, char *ptr, int len) {
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104 file = file; /* avoid warning */
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105 ptr = ptr; /* avoid warning */
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106 len = len; /* avoid warning */
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107 return 0;
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108 }
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109
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110 int
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111 _write(int file, char *ptr, int len) {
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112 int todo;
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113
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114 file = file; /* avoid warning */
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115 for (todo = 0; todo < len; todo++) {
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116 comm_put(*ptr++);
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117 }
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118 return len;
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119 }
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120
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121 int
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122 _gettimeofday_r(struct _reent *reent __attribute__((unused)), struct timeval *tp, void *tzp __attribute__((unused))) {
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123 tp->tv_sec = RTC_GetCounter();
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124 tp->tv_usec = RTC_PS2USEC(RTC_GetDivider());
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125
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126 return 0;
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127 }
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128
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129 int
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130 settimeofday(const struct timeval *tp, const struct timezone *tzp __attribute__((unused))) {
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131 RTC_SetCounter(tp->tv_sec);
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132
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133 return 0;
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134 }
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135
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136 clock_t
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137 _clock (void) {
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138 return RTC_GetCounter();
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139 }
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140
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141 void
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142 __tz_lock (void) {
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143 }
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144
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145
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146 void
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147 __tz_unlock (void) {
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148 }
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149
33
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150 /* Set tzinfo directly so we don't need tzset() which requires getenv() */
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151 #ifdef USE_UTC
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152 static __tzinfo_type tzinfo = {1, 0,
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153 { {'J', 0, 0, 0, 0, (time_t)0, 0L },
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154 {'J', 0, 0, 0, 0, (time_t)0, 0L }
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155 }
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156 };
33
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157 #else
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158 /* ACST (south)
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159 * Switch from DST 3am 1st Sunday of April: -9.5 hours to UTC
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160 * Switch to DST 2am 1st Sunday October: -10.5 hours to UTC
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161 *
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162 * Copied from http://www.sourceware.org/ml/newlib/2008/msg00311.html
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163 */
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164 static __tzinfo_type tzinfo = {0, 0, {
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165 {'M', 4, 5, 0, 10800, (time_t)0, -37800L },
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166 {'M', 10, 5, 0, 7200, (time_t)0, -34200L }
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167 }
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168 };
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169 #endif
3
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170
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171 __tzinfo_type *
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172 __gettzinfo (void) {
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173 return &tzinfo;
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174 }
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175
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176 /* Stub, required for strftime?! */
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177 int
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178 _open(const char *name __attribute__((unused)), int mode __attribute__((unused)), ...) {
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179 return -1;
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180 }