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annotate packages/cygmon/current/misc/breakpoints.c @ 76:435cced73e2f ecos-v1_3_1-release

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eCos v1.3.1 merged from eCos master repository on 2000-03-27-23:22:51-BST
author jlarmour
date Tue, 28 Mar 2000 14:10:45 +0000
parents
children 02ea4320376c
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76
435cced73e2f eCos v1.3.1 merged from eCos master repository on 2000-03-27-23:22:51-BST
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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
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45 #include <stdlib.h>
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46 #ifdef HAVE_BSP
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47 #include <bsp/bsp.h>
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48 #include <bsp/cpu.h>
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49 #endif
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50
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51 #include "monitor.h"
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52 #include "tservice.h"
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53 #include "stub-tservice.h"
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54
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55 #include "fmt_util.h"
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56
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57
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58 static struct bp *last_bp_ptr;
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59 static struct bp *first_bp_ptr;
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60
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61 #ifdef NO_MALLOC
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62 static struct bp *free_bp_list;
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63 static struct bp bp_list[MAX_NUM_BP];
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64 static int curr_bp_num;
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65 #endif
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66
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67 int
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68 add_mon_breakpoint (mem_addr_t location)
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69 {
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70 struct bp *ptr;
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71 struct bp *new_bp_ptr;
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72
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73 for (ptr = first_bp_ptr; ptr != NULL; ptr = ptr->next)
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74 {
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75 if (MEM_ADDR_EQ_P (ptr->address, location))
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76 return 1;
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77 }
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78 #ifdef NO_MALLOC
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79 if (free_bp_list != NULL)
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80 {
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81 new_bp_ptr = free_bp_list;
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82 free_bp_list = new_bp_ptr->next;
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83 }
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84 else
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85 {
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86 if (curr_bp_num < MAX_NUM_BP)
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87 {
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88 new_bp_ptr = &bp_list[curr_bp_num++];
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89 }
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90 else
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91 {
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92 xprintf ("No more breakpoints\n");
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93 return 1;
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94 }
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95 }
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96 #else
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97 new_bp_ptr = (struct bp *)malloc (sizeof (struct bp));
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98 #endif
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99
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100 if (first_bp_ptr == NULL)
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101 {
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102 first_bp_ptr = new_bp_ptr;
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103 }
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104 else
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105 {
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106 last_bp_ptr->next = new_bp_ptr;
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107 }
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108 last_bp_ptr = new_bp_ptr;
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109
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110 last_bp_ptr->next = NULL;
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111 last_bp_ptr->address = location;
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112 last_bp_ptr->in_memory = 0;
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113 return 0;
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114 }
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115
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116
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117 void
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118 install_breakpoints (void)
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119 {
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120 struct bp *ptr = first_bp_ptr;
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121 while (ptr != NULL)
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122 {
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123 set_breakpoint (ptr);
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124 ptr = ptr->next;
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125 }
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126 }
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127
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128
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129 void
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130 clear_breakpoints (void)
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131 {
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132 struct bp *ptr = first_bp_ptr;
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133
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134 while (ptr != NULL)
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135 {
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136 clear_breakpoint (ptr);
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137 ptr = ptr->next;
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138 }
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139 }
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140
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141 int
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142 show_breakpoints (void)
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143 {
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144 struct bp *ptr;
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145
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146 for (ptr = first_bp_ptr; ptr != NULL; ptr = ptr->next)
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147 {
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148 char buf[20];
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149
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150 addr2str (&ptr->address, buf);
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151 xprintf ("%s\n", buf);
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152 }
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153
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154 return 0;
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155 }
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156
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157
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158
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159 int
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160 clear_mon_breakpoint (mem_addr_t location)
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161 {
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162 int error = 0;
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163 struct bp *ptr = first_bp_ptr;
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164 struct bp *prev_ptr = NULL;
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165
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166 /* Scan the list looking for the address to clear */
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167 while (ptr != NULL && !MEM_ADDR_EQ_P (ptr->address, location))
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168 {
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169 /* keep a pointer one behind the current position */
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170 prev_ptr = ptr;
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171 ptr = ptr->next;
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172 }
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173 if (ptr == NULL)
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174 {
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175 xprintf ("That address has no breakpoint on it.\n");
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176 error = 1;
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177 }
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178 else
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179 {
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180 /* Just in case it's still in memory. */
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181 clear_breakpoint (ptr);
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182
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183 /* now we'll point the previous bp->next at the one after the one
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184 we're deleting, unless there is no previous bp. */
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185 if (prev_ptr != NULL)
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186 {
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187 prev_ptr->next = ptr->next;
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188 }
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189
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190 if (first_bp_ptr == ptr)
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191 first_bp_ptr = ptr->next;
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192
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193 if (last_bp_ptr == ptr)
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194 last_bp_ptr = prev_ptr;
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195
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196 /* eliminate the offending bp struct */
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197 #ifdef NO_MALLOC
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198 ptr->next = free_bp_list;
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199 free_bp_list = ptr;
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200 #else
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201 free (ptr);
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202 #endif
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203 }
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204 return error;
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205 }
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206