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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 #ifdef HAVE_ELF_H |
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43 #include <elf.h> |
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44 #endif |
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45 #include "pro_incl.h" |
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46 #include "pro_line.h" |
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47 |
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48 Dwarf_Unsigned _dwarf_pro_add_line_entry(Dwarf_P_Debug, |
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49 Dwarf_Unsigned file_index, |
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50 Dwarf_Addr code_address, |
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51 Dwarf_Unsigned symidx, |
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52 Dwarf_Unsigned line_no, |
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53 Dwarf_Signed col_no, |
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54 Dwarf_Bool is_stmt_begin, |
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55 Dwarf_Bool is_bb_begin, |
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56 Dwarf_Ubyte opc, |
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57 Dwarf_Error * error); |
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58 |
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59 /*------------------------------------------------------------------------- |
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60 Add a entry to the line information section |
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61 file_index: index of file in file entries, obtained from |
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62 add_file_entry() call. |
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63 |
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64 This function actually calls _dwarf_pro_add_line_entry(), with |
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65 an extra parameter, the opcode. Done so that interface calls |
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66 dwarf_lne_set_address() and dwarf_lne_end_sequence() can use |
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67 this internal routine. |
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68 ---------------------------------------------------------------------------*/ |
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69 Dwarf_Unsigned |
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70 dwarf_add_line_entry(Dwarf_P_Debug dbg, |
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71 Dwarf_Unsigned file_index, |
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72 Dwarf_Addr code_address, |
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73 Dwarf_Unsigned line_no, |
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74 Dwarf_Signed col_no, |
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75 Dwarf_Bool is_stmt_begin, |
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76 Dwarf_Bool is_bb_begin, Dwarf_Error * error) |
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77 { |
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78 Dwarf_Unsigned retval; |
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79 |
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80 retval = _dwarf_pro_add_line_entry(dbg, file_index, code_address, 0, |
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81 line_no, col_no, is_stmt_begin, |
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82 is_bb_begin, 0, error); |
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83 return retval; |
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84 } |
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85 |
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86 /*------------------------------------------------------------------------ |
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87 Ask to emit DW_LNE_set_address opcode explicitly. Used by be |
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88 to emit start of a new .text section, or to force a relocated |
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89 address into debug line information entry. |
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90 -------------------------------------------------------------------------*/ |
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91 Dwarf_Unsigned |
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92 dwarf_lne_set_address(Dwarf_P_Debug dbg, |
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93 Dwarf_Addr offs, |
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94 Dwarf_Unsigned symidx, Dwarf_Error * error) |
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95 { |
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96 Dwarf_Ubyte opc; |
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97 Dwarf_Unsigned retval; |
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98 |
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99 opc = DW_LNE_set_address; |
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100 retval = |
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101 _dwarf_pro_add_line_entry(dbg, 0, offs, symidx, 0, 0, 0, 0, opc, |
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102 error); |
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103 return retval; |
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104 } |
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105 |
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106 /*------------------------------------------------------------------------ |
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107 Ask to emit end_seqence opcode. Used normally at the end of a |
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108 compilation unit. Can also be used in the middle if there |
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109 are gaps in the region described by the code address. |
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110 -------------------------------------------------------------------------*/ |
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111 Dwarf_Unsigned |
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112 dwarf_lne_end_sequence(Dwarf_P_Debug dbg, |
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113 Dwarf_Addr end_address, Dwarf_Error * error) |
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114 { |
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115 Dwarf_Ubyte opc; |
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116 Dwarf_Unsigned retval; |
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117 |
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118 opc = DW_LNE_end_sequence; |
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119 retval = |
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120 _dwarf_pro_add_line_entry(dbg, 0, end_address, 0, 0, 0, 0, 0, |
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121 opc, error); |
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122 return retval; |
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123 } |
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124 |
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125 /*---------------------------------------------------------------------------- |
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126 Add an entry in the internal list of lines mantained by producer. |
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127 Opc indicates if an opcode needs to be generated, rather than just |
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128 an entry in the matrix. During opcodes generation time, these |
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129 opcodes will be used. |
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130 -----------------------------------------------------------------------------*/ |
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131 Dwarf_Unsigned |
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132 _dwarf_pro_add_line_entry(Dwarf_P_Debug dbg, |
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133 Dwarf_Unsigned file_index, |
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134 Dwarf_Addr code_address, |
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135 Dwarf_Unsigned symidx, |
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136 Dwarf_Unsigned line_no, |
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137 Dwarf_Signed col_no, |
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138 Dwarf_Bool is_stmt_begin, |
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139 Dwarf_Bool is_bb_begin, |
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140 Dwarf_Ubyte opc, Dwarf_Error * error) |
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141 { |
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142 if (dbg->de_lines == NULL) { |
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143 dbg->de_lines = (Dwarf_P_Line) |
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144 _dwarf_p_get_alloc(dbg, sizeof(struct Dwarf_P_Line_s)); |
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145 if (dbg->de_lines == NULL) { |
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146 DWARF_P_DBG_ERROR(dbg, DW_DLE_LINE_ALLOC, DW_DLV_NOCOUNT); |
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147 } |
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148 dbg->de_last_line = dbg->de_lines; |
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149 _dwarf_pro_reg_init(dbg->de_lines); |
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150 |
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151 } else { |
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152 dbg->de_last_line->dpl_next = (Dwarf_P_Line) |
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153 _dwarf_p_get_alloc(dbg, sizeof(struct Dwarf_P_Line_s)); |
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154 if (dbg->de_last_line->dpl_next == NULL) { |
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155 DWARF_P_DBG_ERROR(dbg, DW_DLE_LINE_ALLOC, DW_DLV_NOCOUNT); |
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156 } |
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157 dbg->de_last_line = dbg->de_last_line->dpl_next; |
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158 _dwarf_pro_reg_init(dbg->de_last_line); |
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159 } |
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160 dbg->de_last_line->dpl_address = code_address; |
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161 dbg->de_last_line->dpl_file = (unsigned long) file_index; |
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162 dbg->de_last_line->dpl_line = (unsigned long) line_no; |
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163 dbg->de_last_line->dpl_column = (unsigned long) col_no; |
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164 dbg->de_last_line->dpl_is_stmt = is_stmt_begin; |
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165 dbg->de_last_line->dpl_basic_block = is_bb_begin; |
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166 dbg->de_last_line->dpl_opc = opc; |
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167 dbg->de_last_line->dpl_r_symidx = symidx; |
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168 |
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169 return (0); |
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170 } |
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171 |
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172 /*----------------------------------------------------------------------- |
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173 Add a directory declaration to the debug_line section. Stored |
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174 in linked list. |
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175 ------------------------------------------------------------------------*/ |
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176 Dwarf_Unsigned |
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177 dwarf_add_directory_decl(Dwarf_P_Debug dbg, |
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178 char *name, Dwarf_Error * error) |
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179 { |
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180 if (dbg->de_inc_dirs == NULL) { |
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181 dbg->de_inc_dirs = (Dwarf_P_Inc_Dir) |
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182 _dwarf_p_get_alloc(dbg, sizeof(struct Dwarf_P_Inc_Dir_s)); |
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183 if (dbg->de_inc_dirs == NULL) { |
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184 DWARF_P_DBG_ERROR(dbg, DW_DLE_INCDIR_ALLOC, DW_DLV_NOCOUNT); |
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185 } |
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186 dbg->de_last_inc_dir = dbg->de_inc_dirs; |
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187 dbg->de_n_inc_dirs = 1; |
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188 } else { |
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189 dbg->de_last_inc_dir->did_next = (Dwarf_P_Inc_Dir) |
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190 _dwarf_p_get_alloc(dbg, sizeof(struct Dwarf_P_Inc_Dir_s)); |
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191 if (dbg->de_last_inc_dir->did_next == NULL) { |
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192 DWARF_P_DBG_ERROR(dbg, DW_DLE_INCDIR_ALLOC, DW_DLV_NOCOUNT); |
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193 } |
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194 dbg->de_last_inc_dir = dbg->de_last_inc_dir->did_next; |
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195 dbg->de_n_inc_dirs++; |
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196 } |
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197 dbg->de_last_inc_dir->did_name = |
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198 (char *) _dwarf_p_get_alloc(dbg, strlen(name) + 1); |
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199 if (dbg->de_last_inc_dir->did_name == NULL) { |
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200 DWARF_P_DBG_ERROR(dbg, DW_DLE_STRING_ALLOC, DW_DLV_NOCOUNT); |
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201 } |
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202 strcpy(dbg->de_last_inc_dir->did_name, name); |
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203 dbg->de_last_inc_dir->did_next = NULL; |
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204 |
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205 return dbg->de_n_inc_dirs; |
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206 } |
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207 |
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208 /*----------------------------------------------------------------------- |
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209 Add a file entry declaration to the debug_line section. Stored |
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210 in linked list. The data is immediately encodes as leb128 |
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211 and stored in Dwarf_P_F_Entry_s struct. |
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212 ------------------------------------------------------------------------*/ |
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213 Dwarf_Unsigned |
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214 dwarf_add_file_decl(Dwarf_P_Debug dbg, |
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215 char *name, |
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216 Dwarf_Unsigned dir_idx, |
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217 Dwarf_Unsigned time_mod, |
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218 Dwarf_Unsigned length, Dwarf_Error * error) |
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219 { |
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220 Dwarf_P_F_Entry cur; |
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221 char *ptr; |
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222 int nbytes_idx, nbytes_time, nbytes_len; |
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223 char buffidx[ENCODE_SPACE_NEEDED]; |
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224 char bufftime[ENCODE_SPACE_NEEDED]; |
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225 char bufflen[ENCODE_SPACE_NEEDED]; |
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226 int res; |
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227 |
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228 if (dbg->de_file_entries == NULL) { |
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229 dbg->de_file_entries = (Dwarf_P_F_Entry) |
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230 _dwarf_p_get_alloc(dbg, sizeof(struct Dwarf_P_F_Entry_s)); |
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231 if (dbg->de_file_entries == NULL) { |
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232 DWARF_P_DBG_ERROR(dbg, DW_DLE_FILE_ENTRY_ALLOC, |
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233 DW_DLV_NOCOUNT); |
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234 } |
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235 cur = dbg->de_file_entries; |
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236 dbg->de_last_file_entry = cur; |
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237 dbg->de_n_file_entries = 1; |
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238 } else { |
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239 cur = dbg->de_last_file_entry; |
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240 cur->dfe_next = (Dwarf_P_F_Entry) |
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241 _dwarf_p_get_alloc(dbg, sizeof(struct Dwarf_P_F_Entry_s)); |
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242 if (cur->dfe_next == NULL) { |
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243 DWARF_P_DBG_ERROR(dbg, DW_DLE_FILE_ENTRY_ALLOC, |
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244 DW_DLV_NOCOUNT); |
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245 } |
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246 cur = cur->dfe_next; |
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247 dbg->de_last_file_entry = cur; |
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248 dbg->de_n_file_entries++; |
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249 } |
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250 cur->dfe_name = (char *) _dwarf_p_get_alloc(dbg, strlen(name) + 1); |
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251 if (cur->dfe_name == NULL) { |
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252 DWARF_P_DBG_ERROR(dbg, DW_DLE_ALLOC_FAIL, DW_DLV_NOCOUNT); |
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253 } |
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254 strcpy((char *) cur->dfe_name, name); |
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255 res = _dwarf_pro_encode_leb128_nm(dir_idx, &nbytes_idx, |
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256 buffidx, sizeof(buffidx)); |
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257 if (res != DW_DLV_OK) { |
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258 DWARF_P_DBG_ERROR(dbg, DW_DLE_ALLOC_FAIL, DW_DLV_NOCOUNT); |
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259 } |
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260 res = _dwarf_pro_encode_leb128_nm(time_mod, &nbytes_time, |
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261 bufftime, sizeof(bufftime)); |
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262 if (res != DW_DLV_OK) { |
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263 DWARF_P_DBG_ERROR(dbg, DW_DLE_ALLOC_FAIL, DW_DLV_NOCOUNT); |
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264 } |
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265 res = _dwarf_pro_encode_leb128_nm(length, &nbytes_len, |
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266 bufflen, sizeof(bufflen)); |
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267 cur->dfe_args = (char *) |
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268 _dwarf_p_get_alloc(dbg, nbytes_idx + nbytes_time + nbytes_len); |
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269 if (cur->dfe_args == NULL) { |
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270 DWARF_P_DBG_ERROR(dbg, DW_DLE_ALLOC_FAIL, DW_DLV_NOCOUNT); |
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271 } |
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272 ptr = cur->dfe_args; |
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273 memcpy((void *) ptr, buffidx, nbytes_idx); |
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274 ptr += nbytes_idx; |
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275 memcpy((void *) ptr, bufftime, nbytes_time); |
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276 ptr += nbytes_time; |
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277 memcpy((void *) ptr, bufflen, nbytes_len); |
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278 ptr += nbytes_len; |
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279 cur->dfe_nbytes = nbytes_idx + nbytes_time + nbytes_len; |
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280 cur->dfe_next = NULL; |
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281 |
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282 return dbg->de_n_file_entries; |
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283 } |
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284 |
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285 |
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286 /*--------------------------------------------------------------------- |
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287 Initialize a row of the matrix for line numbers, meaning |
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288 initialize the struct corresponding to it |
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289 ----------------------------------------------------------------------*/ |
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290 void |
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291 _dwarf_pro_reg_init(Dwarf_P_Line cur_line) |
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292 { |
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293 cur_line->dpl_address = 0; |
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294 cur_line->dpl_file = 1; |
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295 cur_line->dpl_line = 1; |
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296 cur_line->dpl_column = 0; |
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297 cur_line->dpl_is_stmt = DEFAULT_IS_STMT; |
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298 cur_line->dpl_basic_block = false; |
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299 cur_line->dpl_next = NULL; |
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300 } |