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annotate packages/hal/common/current/src/bplist-dynamic.c @ 115:6ed91473a1cd ecos-sw-2000-08-21

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Merge from eCos master repository on 2000-08-21-22:40:54-BST
author jlarmour
date Fri, 25 Aug 2000 17:32:38 +0000
parents 5ad2b71d525e
children 0ae0bc38e387
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1 //==========================================================================
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2 //
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3 // bplist-dynamic.c
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4 //
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5 // Dynamic breakpoint list.
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6 // Currently only statically allocated. (ie NO_MALLOC is assumed)
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7 //
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8 //==========================================================================
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9 //####COPYRIGHTBEGIN####
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10 //
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11 // -------------------------------------------
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12 // The contents of this file are subject to the Red Hat eCos Public License
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13 // Version 1.1 (the "License"); you may not use this file except in
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14 // compliance with the License. You may obtain a copy of the License at
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15 // http://www.redhat.com/
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16 //
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17 // Software distributed under the License is distributed on an "AS IS"
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18 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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19 // License for the specific language governing rights and limitations under
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20 // the License.
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21 //
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22 // The Original Code is eCos - Embedded Configurable Operating System,
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23 // released September 30, 1998.
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24 //
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25 // The Initial Developer of the Original Code is Red Hat.
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26 // Portions created by Red Hat are
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27 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
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28 // All Rights Reserved.
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29 // -------------------------------------------
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30 //
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31 //####COPYRIGHTEND####
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32 //==========================================================================
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33 //#####DESCRIPTIONBEGIN####
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34 //
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35 // Author(s):
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36 // Contributors: dmoseley
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37 // Date: 2000-07-11
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38 // Purpose: Dynamic breakpoint list.
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39 // Description:
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40 //
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41 //
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42 //####DESCRIPTIONEND####
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43 //
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44 //=========================================================================
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45
115
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46 #include <pkgconf/system.h>
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47 #include CYGBLD_HAL_PLATFORM_H
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48
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49 #if defined(CYGNUM_HAL_BREAKPOINT_LIST_SIZE) && (CYGNUM_HAL_BREAKPOINT_LIST_SIZE > 0) && defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS)
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50
115
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51 #define CYGARC_HAL_COMMON_EXPORT_CPU_MACROS
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52 #include <cyg/hal/hal_stub.h>
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53 #include <cyg/hal/hal_arch.h>
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54 #include <cyg/hal/hal_cache.h>
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55
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56 /*
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57 * A simple target breakpoint list without using malloc.
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58 * To use this package, you must define HAL_BREAKINST_SIZE to be the size
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59 * in bytes of a trap instruction (max if there's more than one),
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60 * HAL_BREAKINST to the opcode value of the instruction, and
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61 * HAL_BREAKINST_TYPE to be the type necessary to hold the opcode value.
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62 */
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63
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64 struct breakpoint_list {
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65 target_register_t addr;
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66 char old_contents [HAL_BREAKINST_SIZE];
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67 struct breakpoint_list *next;
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68 char in_memory;
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69 } *breakpoint_list = NULL;
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70
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71 static HAL_BREAKINST_TYPE break_inst = HAL_BREAKINST;
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72 static void *_break_inst = &break_inst;
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73
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74 static struct breakpoint_list bp_list [CYGNUM_HAL_BREAKPOINT_LIST_SIZE];
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75 static struct breakpoint_list *free_bp_list = NULL;
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76 static int curr_bp_num = 0;
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77
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78 int
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79 __set_breakpoint (target_register_t addr)
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80 {
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81 struct breakpoint_list **addent = &breakpoint_list;
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82 struct breakpoint_list *l = breakpoint_list;
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83 struct breakpoint_list *newent;
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84
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85 while (l != NULL && l->addr < addr)
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86 {
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87 addent = &l->next;
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88 l = l->next;
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89 }
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90
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91 if (l != NULL && l->addr == addr)
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92 return 2;
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93
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94 if (free_bp_list != NULL)
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95 {
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96 newent = free_bp_list;
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97 free_bp_list = free_bp_list->next;
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98 }
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99 else
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100 {
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101 if (curr_bp_num < CYGNUM_HAL_BREAKPOINT_LIST_SIZE)
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102 {
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103 newent = &bp_list[curr_bp_num++];
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104 }
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105 else
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106 {
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107 return 1;
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108 }
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109 }
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110
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111 newent->addr = addr;
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112 newent->in_memory = 0;
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113 newent->next = l;
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114 *addent = newent;
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115 return 0;
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116 }
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117
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118 int
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119 __remove_breakpoint (target_register_t addr)
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120 {
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121 struct breakpoint_list *l = breakpoint_list;
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122 struct breakpoint_list *prev = NULL;
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123
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124 while (l != NULL && l->addr < addr)
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125 {
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126 prev = l;
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127 l = l->next;
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128 }
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129
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130 if ((l == NULL) || (l->addr != addr))
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131 return 1;
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132
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133 if (l->in_memory)
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134 {
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135 __write_mem_safe (&l->old_contents[0],
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136 (void*)l->addr,
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137 sizeof (l->old_contents));
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138 }
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139
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140 if (prev == NULL)
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141 breakpoint_list = l->next;
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142 else
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143 prev->next = l->next;
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144
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145 l->next = free_bp_list;
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146 free_bp_list = l;
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147
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148 return 0;
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149 }
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150
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151 void
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152 __install_breakpoint_list (void)
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153 {
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154 struct breakpoint_list *l = breakpoint_list;
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155
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156 while (l != NULL)
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157 {
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158 if (! l->in_memory)
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159 {
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160 int len = sizeof (l->old_contents);
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161 if (__read_mem_safe (&l->old_contents[0], (void*)l->addr, len) == len)
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162 {
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163 if (__write_mem_safe (_break_inst, (void*)l->addr, len) == len)
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164 {
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165 l->in_memory = 1;
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166 }
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167 }
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168
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169 }
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170 l = l->next;
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171 }
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172 HAL_ICACHE_SYNC();
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173 }
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174
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175 void
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176 __clear_breakpoint_list (void)
112
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177 {
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178 struct breakpoint_list *l = breakpoint_list;
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179
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180 while (l != NULL)
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181 {
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182 if (l->in_memory)
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183 {
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184 int len = sizeof (l->old_contents);
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185 if (__write_mem_safe (&l->old_contents[0], (void*)l->addr, len) == len)
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186 {
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187 l->in_memory = 0;
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188 }
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189 }
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190 l = l->next;
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191 }
115
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192 HAL_ICACHE_INVALIDATE_ALL();
112
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193 }
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194
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195 int
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196 __display_breakpoint_list (void (*print_func)(target_register_t))
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197 {
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198 struct breakpoint_list *l = breakpoint_list;
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199
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200 while (l != NULL)
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201 {
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202 print_func(l->addr);
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203 l = l->next;
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204 }
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205
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206 return 0;
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207 }
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208
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209 #else // (CYGNUM_HAL_BREAKPOINT_LIST_SIZE == 0) or UNDEFINED
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210
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211 #include <cyg/hal/hal_stub.h> // Our header
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212
115
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213 #ifndef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS
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214 // We don't know that type target_register_t is yet.
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215 // Let's just pick a type so we can compile. Since
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216 // these versions of the functions don't actually do
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217 // anything with the parameters, the actualy types
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218 // don't matter.
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219 typedef unsigned long target_register_t;
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220 #endif
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221
112
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222 int
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223 __set_breakpoint (target_register_t addr)
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224 {
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225 return 1;
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226 }
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227
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228 int
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229 __remove_breakpoint (target_register_t addr)
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230 {
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231 return 1;
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232 }
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233
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234 void
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235 __install_breakpoint_list (void)
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236 {
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237 }
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238
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239 void
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240 __clear_breakpoint_list (void)
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241 {
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242 }
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243
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244 int
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245 __display_breakpoint_list (void (*print_func)(target_register_t))
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246 {
114
5ad2b71d525e Quick fix
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247 return 0;
112
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248 }
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249 #endif // (CYGNUM_HAL_BREAKPOINT_LIST_SIZE > 0)
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250