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annotate packages/cygmon/current/misc/breakpoints.c @ 210:d2c90368aeef

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Merge from eCos master repository on 2002-05-23-21:39:14-BST
author jlarmour
date Thu, 23 May 2002 22:59:51 +0000
parents e0c0827131d1
children
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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 //####ECOSGPLCOPYRIGHTBEGIN####
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9 // -------------------------------------------
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10 // This file is part of eCos, the Embedded Configurable Operating System.
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11 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
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12 //
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13 // eCos is free software; you can redistribute it and/or modify it under
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14 // the terms of the GNU General Public License as published by the Free
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15 // Software Foundation; either version 2 or (at your option) any later version.
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16 //
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17 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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18 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
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19 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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20 // for more details.
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21 //
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22 // You should have received a copy of the GNU General Public License along
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23 // with eCos; if not, write to the Free Software Foundation, Inc.,
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24 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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25 //
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26 // As a special exception, if other files instantiate templates or use macros
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27 // or inline functions from this file, or you compile this file and link it
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28 // with other works to produce a work based on this file, this file does not
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29 // by itself cause the resulting work to be covered by the GNU General Public
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30 // License. However the source code for this file must still be made available
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31 // in accordance with section (3) of the GNU General Public License.
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32 //
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33 // This exception does not invalidate any other reasons why a work based on
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34 // this file might be covered by the GNU General Public License.
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35 //
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36 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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37 // at http://sources.redhat.com/ecos/ecos-license/
208
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38 // -------------------------------------------
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39 //####ECOSGPLCOPYRIGHTEND####
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40 //==========================================================================
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41 //#####DESCRIPTIONBEGIN####
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42 //
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43 // Author(s):
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44 // Contributors: gthomas
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45 // Date: 1999-10-20
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46 // Purpose:
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47 // Description:
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48 //
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49 //
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50 //####DESCRIPTIONEND####
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51 //
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52 //=========================================================================
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53
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54 #include "board.h"
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55
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56 #ifndef USE_ECOS_HAL_BREAKPOINTS
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57
76
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58 #include <stdlib.h>
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59 #ifdef HAVE_BSP
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60 #include <bsp/bsp.h>
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61 #include <bsp/cpu.h>
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62 #endif
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63
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64 #include "monitor.h"
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65 #include "tservice.h"
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66 #include "stub-tservice.h"
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67
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68 #include "fmt_util.h"
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69
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70
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71 static struct bp *last_bp_ptr;
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72 static struct bp *first_bp_ptr;
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73
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74 #ifdef NO_MALLOC
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75 static struct bp *free_bp_list;
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76 static struct bp bp_list[MAX_NUM_BP];
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77 static int curr_bp_num;
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78 #endif
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79
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80 int
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81 add_mon_breakpoint (mem_addr_t location)
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82 {
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83 struct bp *ptr;
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84 struct bp *new_bp_ptr;
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85
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86 for (ptr = first_bp_ptr; ptr != NULL; ptr = ptr->next)
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87 {
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88 if (MEM_ADDR_EQ_P (ptr->address, location))
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89 return 1;
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90 }
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91 #ifdef NO_MALLOC
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92 if (free_bp_list != NULL)
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93 {
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94 new_bp_ptr = free_bp_list;
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95 free_bp_list = new_bp_ptr->next;
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96 }
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97 else
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98 {
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99 if (curr_bp_num < MAX_NUM_BP)
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100 {
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101 new_bp_ptr = &bp_list[curr_bp_num++];
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102 }
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103 else
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104 {
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105 xprintf ("No more breakpoints\n");
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106 return 1;
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107 }
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108 }
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109 #else
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110 new_bp_ptr = (struct bp *)malloc (sizeof (struct bp));
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111 #endif
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112
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113 if (first_bp_ptr == NULL)
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114 {
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115 first_bp_ptr = new_bp_ptr;
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116 }
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117 else
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118 {
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119 last_bp_ptr->next = new_bp_ptr;
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120 }
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121 last_bp_ptr = new_bp_ptr;
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122
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123 last_bp_ptr->next = NULL;
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124 last_bp_ptr->address = location;
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125 last_bp_ptr->in_memory = 0;
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126 return 0;
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127 }
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128
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129
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130 void
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131 install_breakpoints (void)
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132 {
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133 struct bp *ptr = first_bp_ptr;
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134 while (ptr != NULL)
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135 {
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136 set_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
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142 void
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143 clear_breakpoints (void)
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144 {
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145 struct bp *ptr = first_bp_ptr;
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146
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147 while (ptr != NULL)
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148 {
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149 clear_breakpoint (ptr);
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150 ptr = ptr->next;
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151 }
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152 }
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153
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154 int
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155 show_breakpoints (void)
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156 {
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157 struct bp *ptr;
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158
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159 for (ptr = first_bp_ptr; ptr != NULL; ptr = ptr->next)
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160 {
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161 char buf[20];
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162
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163 addr2str (&ptr->address, buf);
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164 xprintf ("%s\n", buf);
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165 }
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166
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167 return 0;
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168 }
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169
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170
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171
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172 int
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173 clear_mon_breakpoint (mem_addr_t location)
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174 {
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175 int error = 0;
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176 struct bp *ptr = first_bp_ptr;
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177 struct bp *prev_ptr = NULL;
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178
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179 /* Scan the list looking for the address to clear */
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180 while (ptr != NULL && !MEM_ADDR_EQ_P (ptr->address, location))
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181 {
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182 /* keep a pointer one behind the current position */
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183 prev_ptr = ptr;
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184 ptr = ptr->next;
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185 }
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186 if (ptr == NULL)
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187 {
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188 xprintf ("That address has no breakpoint on it.\n");
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189 error = 1;
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190 }
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191 else
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192 {
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193 /* Just in case it's still in memory. */
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194 clear_breakpoint (ptr);
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195
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196 /* now we'll point the previous bp->next at the one after the one
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197 we're deleting, unless there is no previous bp. */
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198 if (prev_ptr != NULL)
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199 {
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200 prev_ptr->next = ptr->next;
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201 }
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202
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203 if (first_bp_ptr == ptr)
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204 first_bp_ptr = ptr->next;
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205
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206 if (last_bp_ptr == ptr)
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207 last_bp_ptr = prev_ptr;
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208
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209 /* eliminate the offending bp struct */
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210 #ifdef NO_MALLOC
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211 ptr->next = free_bp_list;
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212 free_bp_list = ptr;
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213 #else
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214 free (ptr);
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215 #endif
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216 }
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217 return error;
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218 }
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219
112
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220 #endif /* USE_ECOS_HAL_BREAKPOINTS */