FreeCalypso > hg > fc-magnetite
annotate src/gpf3/ccd/s_padding_0.c @ 516:1ed9de6c90bd
src/g23m-gsm/sms/sms_for.c: bogus malloc removed
The new error handling code that was not present in TCS211 blob version
contains a malloc call that is bogus for 3 reasons:
1) The memory allocation in question is not needed in the first place;
2) libc malloc is used instead of one of the firmware's proper ways;
3) The memory allocation is made inside a function and then never freed,
i.e., a memory leak.
This bug was caught in gcc-built FreeCalypso fw projects (Citrine
and Selenite) because our gcc environment does not allow any use of
libc malloc (any reference to malloc produces a link failure),
but this code from TCS3.2 is wrong even for Magnetite: if this code
path is executed repeatedly over a long time, the many small allocations
made by this malloc call without a subsequent free will eventually
exhaust the malloc heap provided by the TMS470 environment, malloc will
start returning NULL, and the bogus code will treat it as an error.
Because the memory allocation in question is not needed at all,
the fix entails simply removing it.
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sun, 22 Jul 2018 06:04:49 +0000 |
parents | c41a534f33c6 |
children |
rev | line source |
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1 /* |
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2 +----------------------------------------------------------------------------- |
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3 | Project : CCD |
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4 | Modul : s_padding_0.c |
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5 +----------------------------------------------------------------------------- |
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6 | Copyright 2002 Texas Instruments Berlin, AG |
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7 | All rights reserved. |
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8 | |
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9 | This file is confidential and a trade secret of Texas |
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10 | Instruments Berlin, AG |
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11 | The receipt of or possession of this file does not convey |
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12 | any rights to reproduce or disclose its contents or to |
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13 | manufacture, use, or sell anything it may describe, in |
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14 | whole, or in part, without the specific written consent of |
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15 | Texas Instruments Berlin, AG. |
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16 +----------------------------------------------------------------------------- |
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17 | Purpose : Definition of encoding and decoding functions for S_PADDING_0 |
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18 +----------------------------------------------------------------------------- |
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19 */ |
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20 |
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21 |
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22 /* |
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23 * standard definitions like GLOBAL, UCHAR, ERROR etc. |
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24 */ |
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25 #include "typedefs.h" |
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26 #include "header.h" |
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27 |
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28 /* |
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29 * Prototypes of ccd (USE_DRIVER EQ undef) for prototypes only |
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30 * look at ccdapi.h |
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31 */ |
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32 #undef USE_DRIVER |
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33 #include "ccdapi.h" |
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34 |
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35 /* |
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36 * Types and functions for bit access and manipulation |
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37 */ |
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38 #include "ccd_globs.h" |
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39 #include "bitfun.h" |
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40 |
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41 /* |
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42 * Prototypes of ccd internal functions |
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43 */ |
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44 #include "ccd.h" |
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45 |
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46 /* |
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47 * Declaration of coder/decoder tables |
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48 */ |
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49 #include "ccdtable.h" |
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50 #include "ccddata.h" |
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51 |
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52 #ifndef RUN_FLASH |
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53 /* |
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54 +--------------------------------------------------------------------+ |
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55 | PROJECT : CCD MODULE : s_padding_0 | |
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56 | STATE : code ROUTINE : cdc_padd_0_decode | |
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57 +--------------------------------------------------------------------+ |
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58 |
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59 PURPOSE : Decoding of the GSM Type CSN1 spare padding which is |
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60 preceded by a 0 bit. |
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61 If that bit is read as 1 then a protocol extension is |
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62 assumed by CCD. |
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63 This function does not evaluate the encoded bits, since |
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64 their content is irrelevant. |
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65 */ |
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66 |
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67 SHORT cdc_padd_0_decode (const ULONG c_ref, const ULONG e_ref, T_CCD_Globs *globs) |
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68 { |
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69 U16 cixRef; |
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70 #ifdef DEBUG_CCD |
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71 TRACE_CCD (globs, "cdc_padd_0_decode()"); |
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72 #endif |
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73 |
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74 if (bf_readBit(globs) == 1) |
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75 { |
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76 ccd_recordFault (globs, ERR_PROTOCOL_EXTENSION, CONTINUE, (USHORT) e_ref, NULL); |
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77 } |
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78 |
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79 /* |
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80 * Do not decode padding bits. They are not relevant. |
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81 * Just adjust the position pointer in the bit stream buffer. |
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82 * Either to the next octet boundary or to the message end, if necessary. |
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83 */ |
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84 bf_incBitpos (8-(globs->bitpos & 7), globs); |
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85 |
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86 /* First assume padding bits up to an octet boundary. In this case |
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87 * message extension could be made of T, TV or TLV types. |
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88 */ |
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89 globs->SeekTLVExt = TRUE; |
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90 |
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91 cixRef = melem[e_ref].calcIdxRef; |
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92 if (calcidx[cixRef].numPrologSteps > 0) |
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93 { |
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94 U16 msgEnd = (USHORT) calc[calcidx[cixRef].prologStepRef].operand * 8; |
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95 if (msgEnd) |
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96 { |
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97 msgEnd += globs->bitoffs; |
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98 msgEnd = (USHORT)MINIMUM(globs->maxBitpos, msgEnd); |
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99 bf_setBitpos (msgEnd, globs); |
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100 /* |
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101 * Padding bytes exclude the presence of message extension. |
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102 */ |
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103 globs->SeekTLVExt = FALSE; |
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104 } |
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105 } |
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106 return 1; |
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107 } |
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108 #endif /* !RUN_FLASH */ |
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109 |
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110 #ifndef RUN_FLASH |
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111 /* |
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112 +--------------------------------------------------------------------+ |
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113 | PROJECT : CCD MODULE : s_padding_0.c | |
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114 | STATE : code ROUTINE : cdc_padd_0_encode | |
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115 +--------------------------------------------------------------------+ |
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116 |
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117 PURPOSE : Encoding of the GSM Type CSN1 spare padding which is |
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118 preceded by a 0 bit. |
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119 Supported padding values are 0x00 and 0x2B. |
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120 If the first prologue step is a value msg_len, padding |
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121 is done until globs->bitpos is msg_len*8. |
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122 Otherwise until the octet boundary. |
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123 */ |
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124 |
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125 SHORT cdc_padd_0_encode (const ULONG c_ref, const ULONG e_ref, T_CCD_Globs *globs) |
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126 { |
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127 U8 padd_bit = 0; |
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128 U16 cixRef; |
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129 U16 msgLen = globs->buflen; |
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130 BOOL paddingOctets = FALSE; |
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131 |
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132 #ifdef DEBUG_CCD |
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133 TRACE_CCD (globs, "cdc_padd_0_encode()"); |
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134 #endif |
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135 |
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136 cixRef = melem[e_ref].calcIdxRef; |
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137 |
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138 /* |
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139 * if this element is conditional, check the condition |
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140 */ |
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141 if (calcidx[cixRef].numCondCalcs NEQ 0 |
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142 AND ! ccd_conditionOK (e_ref, globs)) |
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143 return 1; |
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144 |
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145 if (calcidx[cixRef].numPrologSteps > 0) |
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146 { |
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147 if (calc[calcidx[cixRef].prologStepRef].operation NEQ 'P') |
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148 ccd_setError (globs, ERR_INTERNAL_ERROR, BREAK, (USHORT) -1); |
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149 else |
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150 { |
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151 msgLen = (USHORT)(calc[calcidx[cixRef].prologStepRef].operand * 8); |
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152 paddingOctets = TRUE; |
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153 } |
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154 } |
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155 |
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156 /* |
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157 * If there is some space left for spare padding, we will code them. |
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158 * If the bit pos pointer goes beyond the message border, ccd will detect |
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159 * this later and bring a warning. But not here. Reason: saving room. |
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160 */ |
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161 if (globs->bitpos - globs->bitoffs < msgLen ) |
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162 { |
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163 /* |
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164 * The IE should be present in the message so we code 0 bit. |
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165 */ |
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166 bf_writeBit (0, globs); |
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167 |
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168 if (melem[e_ref].elemType EQ 'S' AND spare[melem[e_ref].elemRef].bSize EQ 8) |
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169 { |
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170 ULONG spareVal = spare[melem[e_ref].elemRef].value; |
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171 /* |
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172 * Element is a SPARE of length 8. |
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173 */ |
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174 while (globs->bitpos % 8 NEQ 0) |
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175 { |
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176 switch(spareVal) |
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177 { |
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178 case 0: |
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179 break; |
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180 case 0x2B: |
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181 padd_bit = (UBYTE)GET_HL(0); |
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182 break; |
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183 default: |
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184 ccd_setError (globs, ERR_INTERNAL_ERROR, |
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185 BREAK, |
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186 (USHORT) (globs->bitpos), |
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187 (USHORT) -1); |
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188 } |
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189 bf_writeBit (padd_bit, globs); |
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190 } |
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191 |
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192 /* Write spare padding octets. */ |
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193 if (paddingOctets) |
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194 { |
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195 while (globs->bitpos - globs->bitoffs < msgLen ) |
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196 { |
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197 bf_codeLongNumber (8, spareVal, globs); |
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198 } |
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199 } |
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200 } |
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201 |
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202 else |
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203 { |
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204 ccd_setError (globs, ERR_INVALID_TYPE, |
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205 BREAK, |
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206 (USHORT) (globs->bitpos), |
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207 (USHORT) -1); |
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208 } |
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209 } |
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210 |
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211 return 1; |
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212 } |
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213 #endif /* !RUN_FLASH */ |