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1 /* |
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2 |
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3 Copyright (C) 2000,2004 Silicon Graphics, Inc. All Rights Reserved. |
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4 |
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5 This program is free software; you can redistribute it and/or modify it |
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6 under the terms of version 2.1 of the GNU Lesser General Public License |
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7 as published by the Free Software Foundation. |
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8 |
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9 This program is distributed in the hope that it would be useful, but |
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10 WITHOUT ANY WARRANTY; without even the implied warranty of |
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11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
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12 |
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13 Further, this software is distributed without any warranty that it is |
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14 free of the rightful claim of any third person regarding infringement |
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15 or the like. Any license provided herein, whether implied or |
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16 otherwise, applies only to this software file. Patent licenses, if |
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17 any, provided herein do not apply to combinations of this program with |
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18 other software, or any other product whatsoever. |
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19 |
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20 You should have received a copy of the GNU Lesser General Public |
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21 License along with this program; if not, write the Free Software |
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22 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston MA 02110-1301, |
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23 USA. |
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24 |
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25 Contact information: Silicon Graphics, Inc., 1500 Crittenden Lane, |
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26 Mountain View, CA 94043, or: |
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27 |
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28 http://www.sgi.com |
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29 |
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30 For further information regarding this notice, see: |
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31 |
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32 http://oss.sgi.com/projects/GenInfo/NoticeExplan |
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33 |
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34 */ |
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35 |
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36 |
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37 |
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38 #include "config.h" |
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39 #include "libdwarfdefs.h" |
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40 #include <stdio.h> |
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41 #include <string.h> |
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42 /*#include <elfaccess.h> */ |
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43 #include "pro_incl.h" |
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44 |
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45 |
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46 /*Do initial alloc of newslots slots. |
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47 Fails only if malloc fails. |
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48 |
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49 Supposed to be called before any relocs allocated. |
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50 Ignored if after any allocated. |
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51 |
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52 Part of an optimization, so that for a known 'newslots' |
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53 relocations count we can preallocate the right size block. |
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54 Called from just 2 places. |
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55 |
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56 returns DW_DLV_OK or DW_DLV_ERROR |
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57 */ |
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58 int |
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59 _dwarf_pro_pre_alloc_n_reloc_slots(Dwarf_P_Debug dbg, |
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60 int rel_sec_index, |
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61 Dwarf_Unsigned newslots) |
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62 { |
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63 unsigned long len; |
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64 struct Dwarf_P_Relocation_Block_s *data; |
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65 Dwarf_P_Per_Reloc_Sect prel = &dbg->de_reloc_sect[rel_sec_index]; |
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66 unsigned long slots_in_blk = (unsigned long) newslots; |
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67 unsigned long rel_rec_size = dbg->de_relocation_record_size; |
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68 |
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69 if (prel->pr_first_block) |
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70 return DW_DLV_OK; /* do nothing */ |
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71 |
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72 len = sizeof(struct Dwarf_P_Relocation_Block_s) + |
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73 slots_in_blk * rel_rec_size; |
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74 |
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75 |
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76 data = (struct Dwarf_P_Relocation_Block_s *) |
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77 _dwarf_p_get_alloc(dbg, len); |
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78 if (!data) { |
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79 return DW_DLV_ERROR; |
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80 } |
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81 data->rb_slots_in_block = slots_in_blk; /* could use default |
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82 here, as fallback in |
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83 case our origininal |
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84 estimate wrong. When |
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85 we call this we |
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86 presumably know what |
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87 we are doing, so |
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88 keep this count for |
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89 now */ |
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90 data->rb_next_slot_to_use = 0; |
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91 data->rb_where_to_add_next = |
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92 ((char *) data) + sizeof(struct Dwarf_P_Relocation_Block_s); |
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93 data->rb_data = data->rb_where_to_add_next; |
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94 |
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95 prel->pr_first_block = data; |
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96 prel->pr_last_block = data; |
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97 prel->pr_block_count = 1; |
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98 |
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99 |
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100 return DW_DLV_OK; |
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101 } |
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102 |
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103 |
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104 /*Do alloc of slots. |
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105 Fails only if malloc fails. |
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106 |
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107 Only allocator used. |
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108 |
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109 returns DW_DLV_OK or DW_DLV_ERROR |
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110 */ |
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111 int |
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112 _dwarf_pro_alloc_reloc_slots(Dwarf_P_Debug dbg, int rel_sec_index) |
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113 { |
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114 unsigned long len; |
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115 struct Dwarf_P_Relocation_Block_s *data; |
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116 Dwarf_P_Per_Reloc_Sect prel = &dbg->de_reloc_sect[rel_sec_index]; |
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117 unsigned long slots_in_blk = prel->pr_slots_per_block_to_alloc; |
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118 unsigned long rel_rec_size = dbg->de_relocation_record_size; |
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119 |
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120 len = sizeof(struct Dwarf_P_Relocation_Block_s) + |
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121 slots_in_blk * rel_rec_size; |
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122 |
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123 data = (struct Dwarf_P_Relocation_Block_s *) |
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124 _dwarf_p_get_alloc(dbg, len); |
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125 if (!data) { |
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126 return DW_DLV_ERROR; |
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127 } |
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128 |
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129 if (prel->pr_first_block) { |
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130 prel->pr_last_block->rb_next = data; |
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131 prel->pr_last_block = data; |
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132 prel->pr_block_count += 1; |
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133 |
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134 } else { |
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135 |
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136 prel->pr_first_block = data; |
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137 prel->pr_last_block = data; |
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138 prel->pr_block_count = 1; |
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139 } |
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140 |
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141 data->rb_slots_in_block = slots_in_blk; |
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142 data->rb_next_slot_to_use = 0; |
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143 data->rb_where_to_add_next = |
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144 ((char *) data) + sizeof(struct Dwarf_P_Relocation_Block_s); |
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145 data->rb_data = data->rb_where_to_add_next; |
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146 |
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147 return DW_DLV_OK; |
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148 |
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149 } |
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150 |
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151 /* |
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152 Reserve a slot. return DW_DLV_OK if succeeds. |
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153 |
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154 Return DW_DLV_ERROR if fails (malloc error). |
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155 |
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156 Use the relrec_to_fill to pass back a pointer to |
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157 a slot space to use. |
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158 */ |
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159 int |
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160 _dwarf_pro_reloc_get_a_slot(Dwarf_P_Debug dbg, |
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161 int base_sec_index, void **relrec_to_fill) |
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162 { |
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163 struct Dwarf_P_Relocation_Block_s *data; |
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164 Dwarf_P_Per_Reloc_Sect prel = &dbg->de_reloc_sect[base_sec_index]; |
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165 unsigned long rel_rec_size = dbg->de_relocation_record_size; |
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166 |
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167 char *ret_addr; |
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168 |
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169 data = prel->pr_last_block; |
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170 if ((data == 0) || |
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171 (data->rb_next_slot_to_use >= data->rb_slots_in_block)) { |
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172 int res; |
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173 |
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174 res = _dwarf_pro_alloc_reloc_slots(dbg, base_sec_index); |
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175 if (res != DW_DLV_OK) { |
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176 return res; |
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177 } |
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178 } |
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179 |
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180 data = prel->pr_last_block; |
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181 /* now we have an empty slot */ |
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182 ret_addr = data->rb_where_to_add_next; |
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183 |
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184 data->rb_where_to_add_next += rel_rec_size; |
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185 data->rb_next_slot_to_use += 1; |
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186 |
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187 prel->pr_reloc_total_count += 1; |
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188 |
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189 *relrec_to_fill = (void *) ret_addr; |
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190 |
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191 return DW_DLV_OK; |
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192 |
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193 } |
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194 |
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195 /* |
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196 On success returns count of |
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197 .rel.* sections that are symbolic |
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198 thru count_of_relocation_sections. |
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199 |
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200 On success, returns DW_DLV_OK. |
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201 |
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202 If this is not a 'symbolic' run, returns |
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203 DW_DLV_NO_ENTRY. |
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204 |
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205 No errors are possible. |
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206 |
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207 |
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208 |
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209 |
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210 */ |
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211 |
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212 /*ARGSUSED*/ int |
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213 dwarf_get_relocation_info_count(Dwarf_P_Debug dbg, |
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214 Dwarf_Unsigned * |
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215 count_of_relocation_sections, |
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216 int *drd_buffer_version, |
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217 Dwarf_Error * error) |
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218 { |
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219 if (dbg->de_flags & DW_DLC_SYMBOLIC_RELOCATIONS) { |
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220 int i; |
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221 unsigned int count = 0; |
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222 |
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223 for (i = 0; i < NUM_DEBUG_SECTIONS; ++i) { |
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224 if (dbg->de_reloc_sect[i].pr_reloc_total_count > 0) { |
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225 ++count; |
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226 } |
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227 } |
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228 *count_of_relocation_sections = (Dwarf_Unsigned) count; |
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229 *drd_buffer_version = DWARF_DRD_BUFFER_VERSION; |
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230 return DW_DLV_OK; |
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231 } |
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232 return DW_DLV_NO_ENTRY; |
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233 } |
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234 |
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235 int |
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236 dwarf_get_relocation_info(Dwarf_P_Debug dbg, |
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237 Dwarf_Signed * elf_section_index, |
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238 Dwarf_Signed * elf_section_index_link, |
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239 Dwarf_Unsigned * relocation_buffer_count, |
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240 Dwarf_Relocation_Data * reldata_buffer, |
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241 Dwarf_Error * error) |
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242 { |
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243 int next = dbg->de_reloc_next_to_return; |
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244 |
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245 if (dbg->de_flags & DW_DLC_SYMBOLIC_RELOCATIONS) { |
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246 int i; |
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247 |
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248 for (i = next; i < NUM_DEBUG_SECTIONS; ++i) { |
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249 Dwarf_P_Per_Reloc_Sect prel = &dbg->de_reloc_sect[i]; |
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250 |
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251 if (prel->pr_reloc_total_count > 0) { |
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252 dbg->de_reloc_next_to_return = i + 1; |
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253 |
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254 |
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255 /* ASSERT: prel->.pr_block_count == 1 */ |
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256 |
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257 *elf_section_index = prel->pr_sect_num_of_reloc_sect; |
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258 *elf_section_index_link = dbg->de_elf_sects[i]; |
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259 *relocation_buffer_count = prel->pr_reloc_total_count; |
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260 *reldata_buffer = (Dwarf_Relocation_Data) |
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261 (prel->pr_first_block->rb_data); |
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262 return DW_DLV_OK; |
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263 } |
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264 } |
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265 DWARF_P_DBG_ERROR(dbg, DW_DLE_REL_ALLOC, DW_DLV_ERROR); |
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266 } |
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267 return DW_DLV_NO_ENTRY; |
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268 } |