Mercurial > flash_v2

annotate packages/cygmon/current/misc/breakpoints.c @ 112:02ea4320376c ecos-sw-2000-07-21

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Merge from eCos master repository on 2000-07-21-21:01:39-BST
author jlarmour
date Fri, 21 Jul 2000 21:34:11 +0000
parents 435cced73e2f
children e0c0827131d1
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1 //==========================================================================
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2 //
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3 // breakpoints.c
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4 //
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5 // Support aribtrary set of breakpoints.
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6 //
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7 //==========================================================================
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8 //####COPYRIGHTBEGIN####
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9 //
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10 // -------------------------------------------
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11 // The contents of this file are subject to the Red Hat eCos Public License
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12 // Version 1.1 (the "License"); you may not use this file except in
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13 // compliance with the License. You may obtain a copy of the License at
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14 // http://www.redhat.com/
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15 //
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16 // Software distributed under the License is distributed on an "AS IS"
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17 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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18 // License for the specific language governing rights and limitations under
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19 // the License.
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20 //
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21 // The Original Code is eCos - Embedded Configurable Operating System,
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22 // released September 30, 1998.
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23 //
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24 // The Initial Developer of the Original Code is Red Hat.
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25 // Portions created by Red Hat are
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26 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
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27 // All Rights Reserved.
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28 // -------------------------------------------
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29 //
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30 //####COPYRIGHTEND####
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31 //==========================================================================
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32 //#####DESCRIPTIONBEGIN####
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33 //
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34 // Author(s):
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35 // Contributors: gthomas
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36 // Date: 1999-10-20
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37 // Purpose:
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38 // Description:
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39 //
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40 //
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41 //####DESCRIPTIONEND####
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42 //
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43 //=========================================================================
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44
112
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45 #include "board.h"
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46
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47 #ifndef USE_ECOS_HAL_BREAKPOINTS
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48
76
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49 #include <stdlib.h>
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50 #ifdef HAVE_BSP
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51 #include <bsp/bsp.h>
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52 #include <bsp/cpu.h>
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53 #endif
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54
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55 #include "monitor.h"
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56 #include "tservice.h"
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57 #include "stub-tservice.h"
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58
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59 #include "fmt_util.h"
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60
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61
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62 static struct bp *last_bp_ptr;
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63 static struct bp *first_bp_ptr;
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64
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65 #ifdef NO_MALLOC
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66 static struct bp *free_bp_list;
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67 static struct bp bp_list[MAX_NUM_BP];
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68 static int curr_bp_num;
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69 #endif
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70
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71 int
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72 add_mon_breakpoint (mem_addr_t location)
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73 {
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74 struct bp *ptr;
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75 struct bp *new_bp_ptr;
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76
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77 for (ptr = first_bp_ptr; ptr != NULL; ptr = ptr->next)
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78 {
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79 if (MEM_ADDR_EQ_P (ptr->address, location))
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80 return 1;
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81 }
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82 #ifdef NO_MALLOC
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83 if (free_bp_list != NULL)
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84 {
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85 new_bp_ptr = free_bp_list;
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86 free_bp_list = new_bp_ptr->next;
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87 }
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88 else
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89 {
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90 if (curr_bp_num < MAX_NUM_BP)
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91 {
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92 new_bp_ptr = &bp_list[curr_bp_num++];
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93 }
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94 else
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95 {
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96 xprintf ("No more breakpoints\n");
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97 return 1;
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98 }
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99 }
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100 #else
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101 new_bp_ptr = (struct bp *)malloc (sizeof (struct bp));
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102 #endif
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103
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104 if (first_bp_ptr == NULL)
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105 {
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106 first_bp_ptr = new_bp_ptr;
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107 }
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108 else
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109 {
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110 last_bp_ptr->next = new_bp_ptr;
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111 }
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112 last_bp_ptr = new_bp_ptr;
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113
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114 last_bp_ptr->next = NULL;
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115 last_bp_ptr->address = location;
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116 last_bp_ptr->in_memory = 0;
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117 return 0;
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118 }
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119
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120
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121 void
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122 install_breakpoints (void)
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123 {
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124 struct bp *ptr = first_bp_ptr;
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125 while (ptr != NULL)
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126 {
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127 set_breakpoint (ptr);
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128 ptr = ptr->next;
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129 }
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130 }
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131
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132
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133 void
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134 clear_breakpoints (void)
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135 {
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136 struct bp *ptr = first_bp_ptr;
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137
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138 while (ptr != NULL)
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139 {
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140 clear_breakpoint (ptr);
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141 ptr = ptr->next;
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142 }
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143 }
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144
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145 int
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146 show_breakpoints (void)
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147 {
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148 struct bp *ptr;
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149
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150 for (ptr = first_bp_ptr; ptr != NULL; ptr = ptr->next)
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151 {
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152 char buf[20];
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153
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154 addr2str (&ptr->address, buf);
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155 xprintf ("%s\n", buf);
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156 }
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157
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158 return 0;
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159 }
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160
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161
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162
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163 int
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164 clear_mon_breakpoint (mem_addr_t location)
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165 {
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166 int error = 0;
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167 struct bp *ptr = first_bp_ptr;
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168 struct bp *prev_ptr = NULL;
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169
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170 /* Scan the list looking for the address to clear */
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171 while (ptr != NULL && !MEM_ADDR_EQ_P (ptr->address, location))
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172 {
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173 /* keep a pointer one behind the current position */
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174 prev_ptr = ptr;
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175 ptr = ptr->next;
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176 }
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177 if (ptr == NULL)
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178 {
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179 xprintf ("That address has no breakpoint on it.\n");
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180 error = 1;
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181 }
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182 else
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183 {
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184 /* Just in case it's still in memory. */
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185 clear_breakpoint (ptr);
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186
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187 /* now we'll point the previous bp->next at the one after the one
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188 we're deleting, unless there is no previous bp. */
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189 if (prev_ptr != NULL)
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190 {
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191 prev_ptr->next = ptr->next;
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192 }
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193
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194 if (first_bp_ptr == ptr)
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195 first_bp_ptr = ptr->next;
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196
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197 if (last_bp_ptr == ptr)
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198 last_bp_ptr = prev_ptr;
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199
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200 /* eliminate the offending bp struct */
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201 #ifdef NO_MALLOC
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202 ptr->next = free_bp_list;
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203 free_bp_list = ptr;
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204 #else
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205 free (ptr);
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206 #endif
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207 }
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208 return error;
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209 }
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210
112
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211 #endif /* USE_ECOS_HAL_BREAKPOINTS */