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annotate syscalls.c @ 89:fc21fb5b171b default tip

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Make error message more useful
author Daniel O'Connor <darius@dons.net.au>
date Fri, 13 Mar 2015 11:39:59 +1030
parents 0e7d687a2322
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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
36
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20 int *
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21 __errno(void) {
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22 static int _errno;
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23
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24 return(&errno);
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25 }
0
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27 int
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28 _kill(int pid, int sig) {
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29 pid = pid; sig = sig; /* avoid warnings */
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30 errno = EINVAL;
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31 return -1;
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32 }
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33
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34 void
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35 _exit(int status) {
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36 printf("_exit called with parameter %d\r\n", status);
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37 __disable_irq();
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38 while(1)
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39 ;
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40 }
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41
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42 int
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43 _getpid(void) {
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44 return 1;
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45 }
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46
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47 extern char _end; /* Defined by the linker */
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48 static char *heap_end;
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49
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50 char *
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51 get_heap_end(void) {
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52 return (char*) heap_end;
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53 }
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54
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55 char *
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56 get_stack_top(void) {
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57 /* Use MSP (vs PSP) - the processor is in Thread mode out of reset */
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58 return (char*) __get_MSP();
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59 }
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60
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61 caddr_t
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62 _sbrk(int incr) {
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63 char *prev_heap_end;
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64
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65 if (heap_end == 0) {
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66 heap_end = &_end;
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67 }
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68 prev_heap_end = heap_end;
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69
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70 if (heap_end + incr > get_stack_top()) {
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71 printf("Heap and stack collision\r\n");
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72 abort();
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73 }
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74
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75 heap_end += incr;
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76 return (caddr_t) prev_heap_end;
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77 }
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78
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79 int
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80 _close(int file) {
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81 file = file; /* avoid warning */
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82 return -1;
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83 }
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84
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85 int
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86 _fstat(int file, struct stat *st) {
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87 file = file; /* avoid warning */
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88 st->st_mode = S_IFCHR;
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89 return 0;
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90 }
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91
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92 int
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93 _isatty(int file) {
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94 file = file; /* avoid warning */
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95 return 1;
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96 }
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97
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98 int
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99 _lseek(int file, int ptr, int dir) {
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100 file = file; /* avoid warning */
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101 ptr = ptr; /* avoid warning */
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102 dir = dir; /* avoid warning */
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103 return 0;
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104 }
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105
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106 int
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107 _read(int file, char *ptr, int len) {
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108 file = file; /* avoid warning */
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109 ptr = ptr; /* avoid warning */
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110 len = len; /* avoid warning */
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111 return 0;
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112 }
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113
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114 int
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115 _write(int file, char *ptr, int len) {
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116 int todo;
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117
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118 for (todo = 0; todo < len; todo++) {
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119 if (file == 1 || file == 2)
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120 if (*ptr == '\n')
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121 comm_put('\r');
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122 comm_put(*ptr);
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123 ptr++;
0
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124 }
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125 return len;
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126 }
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127
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128 int
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129 _gettimeofday_r(struct _reent *reent __attribute__((unused)), struct timeval *tp, void *tzp __attribute__((unused))) {
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130 tp->tv_sec = RTC_GetCounter();
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131 tp->tv_usec = RTC_PS2USEC(RTC_GetDivider());
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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 int
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137 settimeofday(const struct timeval *tp, const struct timezone *tzp __attribute__((unused))) {
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138 RTC_SetCounter(tp->tv_sec);
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139
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140 return 0;
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141 }
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142
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143 clock_t
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144 _clock (void) {
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145 return RTC_GetCounter();
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146 }
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147
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148 void
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149 __tz_lock (void) {
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150 }
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151
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152
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153 void
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154 __tz_unlock (void) {
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155 }
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156
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157 /* Set tzinfo directly so we don't need tzset() which requires getenv() */
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158 #ifdef USE_UTC
3
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159 static __tzinfo_type tzinfo = {1, 0,
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160 { {'J', 0, 0, 0, 0, (time_t)0, 0L },
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161 {'J', 0, 0, 0, 0, (time_t)0, 0L }
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162 }
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163 };
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164 #else
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165 /* ACST (south)
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166 * Switch from DST 3am 1st Sunday of April: -9.5 hours to UTC
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167 * Switch to DST 2am 1st Sunday October: -10.5 hours to UTC
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168 *
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169 * Copied from http://www.sourceware.org/ml/newlib/2008/msg00311.html
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170 */
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171 static __tzinfo_type tzinfo = {0, 0, {
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172 {'M', 4, 5, 0, 10800, (time_t)0, -34200L },
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173 {'M', 10, 5, 0, 7200, (time_t)0, -37800L }
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174 }
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175 };
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176 #endif
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177
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178 __tzinfo_type *
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179 __gettzinfo (void) {
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180 return &tzinfo;
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181 }
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182
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183 /* Stub, required for strftime?! */
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184 int
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185 _open(const char *name __attribute__((unused)), int mode __attribute__((unused)), ...) {
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186 return -1;
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187 }