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Rev | Author | Line No. | Line |
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5217 | serge | 1 | /* stabs.c -- Parse COFF debugging information |
6324 | serge | 2 | Copyright (C) 1996-2015 Free Software Foundation, Inc. |
5217 | serge | 3 | Written by Ian Lance Taylor |
4 | |||
5 | This file is part of GNU Binutils. |
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6 | |||
7 | This program is free software; you can redistribute it and/or modify |
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8 | it under the terms of the GNU General Public License as published by |
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9 | the Free Software Foundation; either version 3 of the License, or |
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10 | (at your option) any later version. |
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11 | |||
12 | This program is distributed in the hope that it will be useful, |
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13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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15 | GNU General Public License for more details. |
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16 | |||
17 | You should have received a copy of the GNU General Public License |
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18 | along with this program; if not, write to the Free Software |
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19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA |
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20 | 02110-1301, USA. */ |
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21 | |||
22 | /* This file contains code which parses COFF debugging information. */ |
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23 | |||
24 | #include "sysdep.h" |
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25 | #include "bfd.h" |
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26 | #include "coff/internal.h" |
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27 | #include "libiberty.h" |
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28 | #include "bucomm.h" |
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29 | #include "debug.h" |
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30 | #include "budbg.h" |
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31 | |||
32 | /* FIXME: We should not need this BFD internal file. We need it for |
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33 | the N_BTMASK, etc., values. */ |
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34 | #include "libcoff.h" |
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35 | |||
36 | /* These macros extract the right mask and shifts for this BFD. They |
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37 | assume that there is a local variable named ABFD. This is so that |
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38 | macros like ISFCN and DECREF, from coff/internal.h, will work |
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39 | without modification. */ |
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40 | #define N_BTMASK (coff_data (abfd)->local_n_btmask) |
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41 | #define N_BTSHFT (coff_data (abfd)->local_n_btshft) |
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42 | #define N_TMASK (coff_data (abfd)->local_n_tmask) |
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43 | #define N_TSHIFT (coff_data (abfd)->local_n_tshift) |
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44 | |||
45 | /* This structure is used to hold the symbols, as well as the current |
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46 | location within the symbols. */ |
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47 | |||
48 | struct coff_symbols |
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49 | { |
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50 | /* The symbols. */ |
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51 | asymbol **syms; |
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52 | /* The number of symbols. */ |
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53 | long symcount; |
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54 | /* The index of the current symbol. */ |
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55 | long symno; |
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56 | /* The index of the current symbol in the COFF symbol table (where |
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57 | each auxent counts as a symbol). */ |
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58 | long coff_symno; |
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59 | }; |
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60 | |||
61 | /* The largest basic type we are prepared to handle. */ |
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62 | |||
63 | #define T_MAX (T_LNGDBL) |
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64 | |||
65 | /* This structure is used to hold slots. */ |
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66 | |||
67 | struct coff_slots |
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68 | { |
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69 | /* Next set of slots. */ |
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70 | struct coff_slots *next; |
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71 | /* Slots. */ |
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72 | #define COFF_SLOTS (16) |
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73 | debug_type slots[COFF_SLOTS]; |
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74 | }; |
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75 | |||
76 | /* This structure is used to map symbol indices to types. */ |
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77 | |||
78 | struct coff_types |
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79 | { |
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80 | /* Slots. */ |
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81 | struct coff_slots *slots; |
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82 | /* Basic types. */ |
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83 | debug_type basic[T_MAX + 1]; |
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84 | }; |
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85 | |||
6324 | serge | 86 | static debug_type *coff_get_slot (struct coff_types *, long); |
5217 | serge | 87 | static debug_type parse_coff_type |
88 | (bfd *, struct coff_symbols *, struct coff_types *, long, int, |
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89 | union internal_auxent *, bfd_boolean, void *); |
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90 | static debug_type parse_coff_base_type |
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91 | (bfd *, struct coff_symbols *, struct coff_types *, long, int, |
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92 | union internal_auxent *, void *); |
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93 | static debug_type parse_coff_struct_type |
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94 | (bfd *, struct coff_symbols *, struct coff_types *, int, |
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95 | union internal_auxent *, void *); |
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96 | static debug_type parse_coff_enum_type |
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97 | (bfd *, struct coff_symbols *, struct coff_types *, |
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98 | union internal_auxent *, void *); |
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99 | static bfd_boolean parse_coff_symbol |
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100 | (bfd *, struct coff_types *, asymbol *, long, struct internal_syment *, |
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101 | void *, debug_type, bfd_boolean); |
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102 | static bfd_boolean external_coff_symbol_p (int sym_class); |
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103 | |||
104 | /* Return the slot for a type. */ |
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105 | |||
106 | static debug_type * |
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6324 | serge | 107 | coff_get_slot (struct coff_types *types, long indx) |
5217 | serge | 108 | { |
109 | struct coff_slots **pps; |
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110 | |||
111 | pps = &types->slots; |
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112 | |||
6324 | serge | 113 | /* PR 17512: file: 078-18333-0.001:0.1. |
114 | FIXME: The value of 1000 is a guess. Maybe a better heuristic is needed. */ |
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115 | if (indx / COFF_SLOTS > 1000) |
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116 | fatal (_("Excessively large slot index: %lx"), indx); |
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117 | |||
5217 | serge | 118 | while (indx >= COFF_SLOTS) |
119 | { |
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120 | if (*pps == NULL) |
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121 | { |
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122 | *pps = (struct coff_slots *) xmalloc (sizeof **pps); |
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123 | memset (*pps, 0, sizeof **pps); |
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124 | } |
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125 | pps = &(*pps)->next; |
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126 | indx -= COFF_SLOTS; |
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127 | } |
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128 | |||
129 | if (*pps == NULL) |
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130 | { |
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131 | *pps = (struct coff_slots *) xmalloc (sizeof **pps); |
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132 | memset (*pps, 0, sizeof **pps); |
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133 | } |
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134 | |||
135 | return (*pps)->slots + indx; |
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136 | } |
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137 | |||
138 | /* Parse a COFF type code in NTYPE. */ |
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139 | |||
140 | static debug_type |
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141 | parse_coff_type (bfd *abfd, struct coff_symbols *symbols, |
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142 | struct coff_types *types, long coff_symno, int ntype, |
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143 | union internal_auxent *pauxent, bfd_boolean useaux, |
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144 | void *dhandle) |
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145 | { |
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146 | debug_type type; |
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147 | |||
148 | if ((ntype & ~N_BTMASK) != 0) |
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149 | { |
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150 | int newtype; |
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151 | |||
152 | newtype = DECREF (ntype); |
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153 | |||
154 | if (ISPTR (ntype)) |
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155 | { |
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156 | type = parse_coff_type (abfd, symbols, types, coff_symno, newtype, |
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157 | pauxent, useaux, dhandle); |
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158 | type = debug_make_pointer_type (dhandle, type); |
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159 | } |
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160 | else if (ISFCN (ntype)) |
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161 | { |
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162 | type = parse_coff_type (abfd, symbols, types, coff_symno, newtype, |
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163 | pauxent, useaux, dhandle); |
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164 | type = debug_make_function_type (dhandle, type, (debug_type *) NULL, |
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165 | FALSE); |
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166 | } |
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167 | else if (ISARY (ntype)) |
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168 | { |
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169 | int n; |
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170 | |||
171 | if (pauxent == NULL) |
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172 | n = 0; |
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173 | else |
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174 | { |
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175 | unsigned short *dim; |
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176 | int i; |
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177 | |||
178 | /* FIXME: If pauxent->x_sym.x_tagndx.l == 0, gdb sets |
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179 | the c_naux field of the syment to 0. */ |
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180 | |||
181 | /* Move the dimensions down, so that the next array |
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182 | picks up the next one. */ |
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183 | dim = pauxent->x_sym.x_fcnary.x_ary.x_dimen; |
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184 | n = dim[0]; |
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185 | for (i = 0; *dim != 0 && i < DIMNUM - 1; i++, dim++) |
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186 | *dim = *(dim + 1); |
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187 | *dim = 0; |
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188 | } |
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189 | |||
190 | type = parse_coff_type (abfd, symbols, types, coff_symno, newtype, |
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191 | pauxent, FALSE, dhandle); |
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192 | type = debug_make_array_type (dhandle, type, |
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193 | parse_coff_base_type (abfd, symbols, |
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194 | types, |
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195 | coff_symno, |
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196 | T_INT, |
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197 | NULL, dhandle), |
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198 | 0, n - 1, FALSE); |
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199 | } |
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200 | else |
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201 | { |
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202 | non_fatal (_("parse_coff_type: Bad type code 0x%x"), ntype); |
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203 | return DEBUG_TYPE_NULL; |
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204 | } |
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205 | |||
206 | return type; |
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207 | } |
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208 | |||
209 | if (pauxent != NULL && pauxent->x_sym.x_tagndx.l > 0) |
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210 | { |
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211 | debug_type *slot; |
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212 | |||
213 | /* This is a reference to an existing type. FIXME: gdb checks |
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214 | that the class is not C_STRTAG, nor C_UNTAG, nor C_ENTAG. */ |
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215 | slot = coff_get_slot (types, pauxent->x_sym.x_tagndx.l); |
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216 | if (*slot != DEBUG_TYPE_NULL) |
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217 | return *slot; |
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218 | else |
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219 | return debug_make_indirect_type (dhandle, slot, (const char *) NULL); |
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220 | } |
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221 | |||
222 | /* If the aux entry has already been used for something, useaux will |
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223 | have been set to false, indicating that parse_coff_base_type |
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224 | should not use it. We need to do it this way, rather than simply |
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225 | passing pauxent as NULL, because we need to be able handle |
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226 | multiple array dimensions while still discarding pauxent after |
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227 | having handled all of them. */ |
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228 | if (! useaux) |
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229 | pauxent = NULL; |
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230 | |||
231 | return parse_coff_base_type (abfd, symbols, types, coff_symno, ntype, |
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232 | pauxent, dhandle); |
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233 | } |
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234 | |||
235 | /* Parse a basic COFF type in NTYPE. */ |
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236 | |||
237 | static debug_type |
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238 | parse_coff_base_type (bfd *abfd, struct coff_symbols *symbols, |
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239 | struct coff_types *types, long coff_symno, int ntype, |
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240 | union internal_auxent *pauxent, void *dhandle) |
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241 | { |
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242 | debug_type ret; |
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243 | bfd_boolean set_basic; |
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244 | const char *name; |
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245 | debug_type *slot; |
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246 | |||
247 | if (ntype >= 0 |
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248 | && ntype <= T_MAX |
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249 | && types->basic[ntype] != DEBUG_TYPE_NULL) |
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250 | return types->basic[ntype]; |
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251 | |||
252 | set_basic = TRUE; |
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253 | name = NULL; |
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254 | |||
255 | switch (ntype) |
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256 | { |
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257 | default: |
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258 | ret = debug_make_void_type (dhandle); |
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259 | break; |
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260 | |||
261 | case T_NULL: |
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262 | case T_VOID: |
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263 | ret = debug_make_void_type (dhandle); |
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264 | name = "void"; |
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265 | break; |
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266 | |||
267 | case T_CHAR: |
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268 | ret = debug_make_int_type (dhandle, 1, FALSE); |
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269 | name = "char"; |
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270 | break; |
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271 | |||
272 | case T_SHORT: |
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273 | ret = debug_make_int_type (dhandle, 2, FALSE); |
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274 | name = "short"; |
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275 | break; |
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276 | |||
277 | case T_INT: |
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278 | /* FIXME: Perhaps the size should depend upon the architecture. */ |
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279 | ret = debug_make_int_type (dhandle, 4, FALSE); |
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280 | name = "int"; |
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281 | break; |
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282 | |||
283 | case T_LONG: |
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284 | ret = debug_make_int_type (dhandle, 4, FALSE); |
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285 | name = "long"; |
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286 | break; |
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287 | |||
288 | case T_FLOAT: |
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289 | ret = debug_make_float_type (dhandle, 4); |
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290 | name = "float"; |
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291 | break; |
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292 | |||
293 | case T_DOUBLE: |
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294 | ret = debug_make_float_type (dhandle, 8); |
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295 | name = "double"; |
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296 | break; |
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297 | |||
298 | case T_LNGDBL: |
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299 | ret = debug_make_float_type (dhandle, 12); |
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300 | name = "long double"; |
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301 | break; |
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302 | |||
303 | case T_UCHAR: |
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304 | ret = debug_make_int_type (dhandle, 1, TRUE); |
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305 | name = "unsigned char"; |
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306 | break; |
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307 | |||
308 | case T_USHORT: |
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309 | ret = debug_make_int_type (dhandle, 2, TRUE); |
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310 | name = "unsigned short"; |
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311 | break; |
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312 | |||
313 | case T_UINT: |
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314 | ret = debug_make_int_type (dhandle, 4, TRUE); |
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315 | name = "unsigned int"; |
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316 | break; |
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317 | |||
318 | case T_ULONG: |
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319 | ret = debug_make_int_type (dhandle, 4, TRUE); |
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320 | name = "unsigned long"; |
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321 | break; |
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322 | |||
323 | case T_STRUCT: |
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324 | if (pauxent == NULL) |
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325 | ret = debug_make_struct_type (dhandle, TRUE, 0, |
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326 | (debug_field *) NULL); |
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327 | else |
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328 | ret = parse_coff_struct_type (abfd, symbols, types, ntype, pauxent, |
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329 | dhandle); |
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330 | |||
331 | slot = coff_get_slot (types, coff_symno); |
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332 | *slot = ret; |
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333 | |||
334 | set_basic = FALSE; |
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335 | break; |
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336 | |||
337 | case T_UNION: |
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338 | if (pauxent == NULL) |
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339 | ret = debug_make_struct_type (dhandle, FALSE, 0, (debug_field *) NULL); |
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340 | else |
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341 | ret = parse_coff_struct_type (abfd, symbols, types, ntype, pauxent, |
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342 | dhandle); |
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343 | |||
344 | slot = coff_get_slot (types, coff_symno); |
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345 | *slot = ret; |
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346 | |||
347 | set_basic = FALSE; |
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348 | break; |
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349 | |||
350 | case T_ENUM: |
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351 | if (pauxent == NULL) |
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352 | ret = debug_make_enum_type (dhandle, (const char **) NULL, |
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353 | (bfd_signed_vma *) NULL); |
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354 | else |
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355 | ret = parse_coff_enum_type (abfd, symbols, types, pauxent, dhandle); |
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356 | |||
357 | slot = coff_get_slot (types, coff_symno); |
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358 | *slot = ret; |
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359 | |||
360 | set_basic = FALSE; |
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361 | break; |
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362 | } |
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363 | |||
364 | if (name != NULL) |
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365 | ret = debug_name_type (dhandle, name, ret); |
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366 | |||
367 | if (set_basic |
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368 | && ntype >= 0 |
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369 | && ntype <= T_MAX) |
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370 | types->basic[ntype] = ret; |
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371 | |||
372 | return ret; |
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373 | } |
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374 | |||
375 | /* Parse a struct type. */ |
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376 | |||
377 | static debug_type |
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378 | parse_coff_struct_type (bfd *abfd, struct coff_symbols *symbols, |
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379 | struct coff_types *types, int ntype, |
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380 | union internal_auxent *pauxent, void *dhandle) |
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381 | { |
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382 | long symend; |
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383 | int alloc; |
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384 | debug_field *fields; |
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385 | int count; |
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386 | bfd_boolean done; |
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387 | |||
388 | symend = pauxent->x_sym.x_fcnary.x_fcn.x_endndx.l; |
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389 | |||
390 | alloc = 10; |
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391 | fields = (debug_field *) xmalloc (alloc * sizeof *fields); |
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392 | count = 0; |
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393 | |||
394 | done = FALSE; |
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395 | while (! done |
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396 | && symbols->coff_symno < symend |
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397 | && symbols->symno < symbols->symcount) |
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398 | { |
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399 | asymbol *sym; |
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400 | long this_coff_symno; |
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401 | struct internal_syment syment; |
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402 | union internal_auxent auxent; |
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403 | union internal_auxent *psubaux; |
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404 | bfd_vma bitpos = 0, bitsize = 0; |
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405 | |||
406 | sym = symbols->syms[symbols->symno]; |
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407 | |||
408 | if (! bfd_coff_get_syment (abfd, sym, &syment)) |
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409 | { |
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410 | non_fatal (_("bfd_coff_get_syment failed: %s"), |
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411 | bfd_errmsg (bfd_get_error ())); |
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412 | return DEBUG_TYPE_NULL; |
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413 | } |
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414 | |||
415 | this_coff_symno = symbols->coff_symno; |
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416 | |||
417 | ++symbols->symno; |
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418 | symbols->coff_symno += 1 + syment.n_numaux; |
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419 | |||
420 | if (syment.n_numaux == 0) |
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421 | psubaux = NULL; |
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422 | else |
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423 | { |
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424 | if (! bfd_coff_get_auxent (abfd, sym, 0, &auxent)) |
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425 | { |
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426 | non_fatal (_("bfd_coff_get_auxent failed: %s"), |
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427 | bfd_errmsg (bfd_get_error ())); |
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428 | return DEBUG_TYPE_NULL; |
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429 | } |
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430 | psubaux = &auxent; |
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431 | } |
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432 | |||
433 | switch (syment.n_sclass) |
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434 | { |
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435 | case C_MOS: |
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436 | case C_MOU: |
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437 | bitpos = 8 * bfd_asymbol_value (sym); |
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438 | bitsize = 0; |
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439 | break; |
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440 | |||
441 | case C_FIELD: |
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442 | bitpos = bfd_asymbol_value (sym); |
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443 | bitsize = auxent.x_sym.x_misc.x_lnsz.x_size; |
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444 | break; |
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445 | |||
446 | case C_EOS: |
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447 | done = TRUE; |
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448 | break; |
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449 | } |
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450 | |||
451 | if (! done) |
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452 | { |
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453 | debug_type ftype; |
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454 | debug_field f; |
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455 | |||
456 | ftype = parse_coff_type (abfd, symbols, types, this_coff_symno, |
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457 | syment.n_type, psubaux, TRUE, dhandle); |
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458 | f = debug_make_field (dhandle, bfd_asymbol_name (sym), ftype, |
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459 | bitpos, bitsize, DEBUG_VISIBILITY_PUBLIC); |
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460 | if (f == DEBUG_FIELD_NULL) |
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461 | return DEBUG_TYPE_NULL; |
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462 | |||
463 | if (count + 1 >= alloc) |
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464 | { |
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465 | alloc += 10; |
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466 | fields = ((debug_field *) |
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467 | xrealloc (fields, alloc * sizeof *fields)); |
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468 | } |
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469 | |||
470 | fields[count] = f; |
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471 | ++count; |
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472 | } |
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473 | } |
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474 | |||
475 | fields[count] = DEBUG_FIELD_NULL; |
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476 | |||
477 | return debug_make_struct_type (dhandle, ntype == T_STRUCT, |
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478 | pauxent->x_sym.x_misc.x_lnsz.x_size, |
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479 | fields); |
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480 | } |
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481 | |||
482 | /* Parse an enum type. */ |
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483 | |||
484 | static debug_type |
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485 | parse_coff_enum_type (bfd *abfd, struct coff_symbols *symbols, |
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486 | struct coff_types *types ATTRIBUTE_UNUSED, |
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487 | union internal_auxent *pauxent, void *dhandle) |
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488 | { |
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489 | long symend; |
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490 | int alloc; |
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491 | const char **names; |
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492 | bfd_signed_vma *vals; |
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493 | int count; |
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494 | bfd_boolean done; |
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495 | |||
496 | symend = pauxent->x_sym.x_fcnary.x_fcn.x_endndx.l; |
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497 | |||
498 | alloc = 10; |
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499 | names = (const char **) xmalloc (alloc * sizeof *names); |
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500 | vals = (bfd_signed_vma *) xmalloc (alloc * sizeof *vals); |
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501 | count = 0; |
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502 | |||
503 | done = FALSE; |
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504 | while (! done |
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505 | && symbols->coff_symno < symend |
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506 | && symbols->symno < symbols->symcount) |
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507 | { |
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508 | asymbol *sym; |
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509 | struct internal_syment syment; |
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510 | |||
511 | sym = symbols->syms[symbols->symno]; |
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512 | |||
513 | if (! bfd_coff_get_syment (abfd, sym, &syment)) |
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514 | { |
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515 | non_fatal (_("bfd_coff_get_syment failed: %s"), |
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516 | bfd_errmsg (bfd_get_error ())); |
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517 | return DEBUG_TYPE_NULL; |
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518 | } |
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519 | |||
520 | ++symbols->symno; |
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521 | symbols->coff_symno += 1 + syment.n_numaux; |
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522 | |||
523 | switch (syment.n_sclass) |
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524 | { |
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525 | case C_MOE: |
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526 | if (count + 1 >= alloc) |
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527 | { |
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528 | alloc += 10; |
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529 | names = ((const char **) |
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530 | xrealloc (names, alloc * sizeof *names)); |
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531 | vals = ((bfd_signed_vma *) |
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532 | xrealloc (vals, alloc * sizeof *vals)); |
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533 | } |
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534 | |||
535 | names[count] = bfd_asymbol_name (sym); |
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536 | vals[count] = bfd_asymbol_value (sym); |
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537 | ++count; |
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538 | break; |
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539 | |||
540 | case C_EOS: |
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541 | done = TRUE; |
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542 | break; |
||
543 | } |
||
544 | } |
||
545 | |||
546 | names[count] = NULL; |
||
547 | |||
548 | return debug_make_enum_type (dhandle, names, vals); |
||
549 | } |
||
550 | |||
551 | /* Handle a single COFF symbol. */ |
||
552 | |||
553 | static bfd_boolean |
||
554 | parse_coff_symbol (bfd *abfd ATTRIBUTE_UNUSED, struct coff_types *types, |
||
555 | asymbol *sym, long coff_symno, |
||
556 | struct internal_syment *psyment, void *dhandle, |
||
557 | debug_type type, bfd_boolean within_function) |
||
558 | { |
||
559 | switch (psyment->n_sclass) |
||
560 | { |
||
561 | case C_NULL: |
||
562 | break; |
||
563 | |||
564 | case C_AUTO: |
||
565 | if (! debug_record_variable (dhandle, bfd_asymbol_name (sym), type, |
||
566 | DEBUG_LOCAL, bfd_asymbol_value (sym))) |
||
567 | return FALSE; |
||
568 | break; |
||
569 | |||
570 | case C_WEAKEXT: |
||
571 | case C_EXT: |
||
572 | if (! debug_record_variable (dhandle, bfd_asymbol_name (sym), type, |
||
573 | DEBUG_GLOBAL, bfd_asymbol_value (sym))) |
||
574 | return FALSE; |
||
575 | break; |
||
576 | |||
577 | case C_STAT: |
||
578 | if (! debug_record_variable (dhandle, bfd_asymbol_name (sym), type, |
||
579 | (within_function |
||
580 | ? DEBUG_LOCAL_STATIC |
||
581 | : DEBUG_STATIC), |
||
582 | bfd_asymbol_value (sym))) |
||
583 | return FALSE; |
||
584 | break; |
||
585 | |||
586 | case C_REG: |
||
587 | /* FIXME: We may need to convert the register number. */ |
||
588 | if (! debug_record_variable (dhandle, bfd_asymbol_name (sym), type, |
||
589 | DEBUG_REGISTER, bfd_asymbol_value (sym))) |
||
590 | return FALSE; |
||
591 | break; |
||
592 | |||
593 | case C_LABEL: |
||
594 | break; |
||
595 | |||
596 | case C_ARG: |
||
597 | if (! debug_record_parameter (dhandle, bfd_asymbol_name (sym), type, |
||
598 | DEBUG_PARM_STACK, bfd_asymbol_value (sym))) |
||
599 | return FALSE; |
||
600 | break; |
||
601 | |||
602 | case C_REGPARM: |
||
603 | /* FIXME: We may need to convert the register number. */ |
||
604 | if (! debug_record_parameter (dhandle, bfd_asymbol_name (sym), type, |
||
605 | DEBUG_PARM_REG, bfd_asymbol_value (sym))) |
||
606 | return FALSE; |
||
607 | break; |
||
608 | |||
609 | case C_TPDEF: |
||
610 | type = debug_name_type (dhandle, bfd_asymbol_name (sym), type); |
||
611 | if (type == DEBUG_TYPE_NULL) |
||
612 | return FALSE; |
||
613 | break; |
||
614 | |||
615 | case C_STRTAG: |
||
616 | case C_UNTAG: |
||
617 | case C_ENTAG: |
||
618 | { |
||
619 | debug_type *slot; |
||
620 | |||
621 | type = debug_tag_type (dhandle, bfd_asymbol_name (sym), type); |
||
622 | if (type == DEBUG_TYPE_NULL) |
||
623 | return FALSE; |
||
624 | |||
625 | /* Store the named type into the slot, so that references get |
||
626 | the name. */ |
||
627 | slot = coff_get_slot (types, coff_symno); |
||
628 | *slot = type; |
||
629 | } |
||
630 | break; |
||
631 | |||
632 | default: |
||
633 | break; |
||
634 | } |
||
635 | |||
636 | return TRUE; |
||
637 | } |
||
638 | |||
639 | /* Determine if a symbol has external visibility. */ |
||
640 | |||
641 | static bfd_boolean |
||
642 | external_coff_symbol_p (int sym_class) |
||
643 | { |
||
644 | switch (sym_class) |
||
645 | { |
||
646 | case C_EXT: |
||
647 | case C_WEAKEXT: |
||
648 | return TRUE; |
||
649 | default: |
||
650 | break; |
||
651 | } |
||
652 | return FALSE; |
||
653 | } |
||
654 | |||
655 | /* This is the main routine. It looks through all the symbols and |
||
656 | handles them. */ |
||
657 | |||
658 | bfd_boolean |
||
659 | parse_coff (bfd *abfd, asymbol **syms, long symcount, void *dhandle) |
||
660 | { |
||
661 | struct coff_symbols symbols; |
||
662 | struct coff_types types; |
||
663 | int i; |
||
664 | long next_c_file; |
||
665 | const char *fnname; |
||
666 | int fnclass; |
||
667 | int fntype; |
||
668 | bfd_vma fnend; |
||
669 | alent *linenos; |
||
670 | bfd_boolean within_function; |
||
671 | long this_coff_symno; |
||
672 | |||
673 | symbols.syms = syms; |
||
674 | symbols.symcount = symcount; |
||
675 | symbols.symno = 0; |
||
676 | symbols.coff_symno = 0; |
||
677 | |||
678 | types.slots = NULL; |
||
679 | for (i = 0; i <= T_MAX; i++) |
||
680 | types.basic[i] = DEBUG_TYPE_NULL; |
||
681 | |||
682 | next_c_file = -1; |
||
683 | fnname = NULL; |
||
684 | fnclass = 0; |
||
685 | fntype = 0; |
||
686 | fnend = 0; |
||
687 | linenos = NULL; |
||
688 | within_function = FALSE; |
||
689 | |||
690 | while (symbols.symno < symcount) |
||
691 | { |
||
692 | asymbol *sym; |
||
693 | const char *name; |
||
694 | struct internal_syment syment; |
||
695 | union internal_auxent auxent; |
||
696 | union internal_auxent *paux; |
||
697 | debug_type type; |
||
698 | |||
699 | sym = syms[symbols.symno]; |
||
700 | |||
701 | if (! bfd_coff_get_syment (abfd, sym, &syment)) |
||
702 | { |
||
703 | non_fatal (_("bfd_coff_get_syment failed: %s"), |
||
704 | bfd_errmsg (bfd_get_error ())); |
||
705 | return FALSE; |
||
706 | } |
||
707 | |||
708 | name = bfd_asymbol_name (sym); |
||
709 | |||
710 | this_coff_symno = symbols.coff_symno; |
||
711 | |||
712 | ++symbols.symno; |
||
713 | symbols.coff_symno += 1 + syment.n_numaux; |
||
714 | |||
715 | /* We only worry about the first auxent, because that is the |
||
716 | only one which is relevant for debugging information. */ |
||
717 | if (syment.n_numaux == 0) |
||
718 | paux = NULL; |
||
719 | else |
||
720 | { |
||
721 | if (! bfd_coff_get_auxent (abfd, sym, 0, &auxent)) |
||
722 | { |
||
723 | non_fatal (_("bfd_coff_get_auxent failed: %s"), |
||
724 | bfd_errmsg (bfd_get_error ())); |
||
725 | return FALSE; |
||
726 | } |
||
727 | paux = &auxent; |
||
728 | } |
||
729 | |||
730 | if (this_coff_symno == next_c_file && syment.n_sclass != C_FILE) |
||
731 | { |
||
732 | /* The last C_FILE symbol points to the first external |
||
733 | symbol. */ |
||
734 | if (! debug_set_filename (dhandle, "*globals*")) |
||
735 | return FALSE; |
||
736 | } |
||
737 | |||
738 | switch (syment.n_sclass) |
||
739 | { |
||
740 | case C_EFCN: |
||
741 | case C_EXTDEF: |
||
742 | case C_ULABEL: |
||
743 | case C_USTATIC: |
||
744 | case C_LINE: |
||
745 | case C_ALIAS: |
||
746 | case C_HIDDEN: |
||
747 | /* Just ignore these classes. */ |
||
748 | break; |
||
749 | |||
750 | case C_FILE: |
||
751 | next_c_file = syment.n_value; |
||
752 | if (! debug_set_filename (dhandle, name)) |
||
753 | return FALSE; |
||
754 | break; |
||
755 | |||
756 | case C_STAT: |
||
757 | /* Ignore static symbols with a type of T_NULL. These |
||
758 | represent section entries. */ |
||
759 | if (syment.n_type == T_NULL) |
||
760 | break; |
||
761 | /* Fall through. */ |
||
762 | case C_WEAKEXT: |
||
763 | case C_EXT: |
||
764 | if (ISFCN (syment.n_type)) |
||
765 | { |
||
766 | fnname = name; |
||
767 | fnclass = syment.n_sclass; |
||
768 | fntype = syment.n_type; |
||
769 | if (syment.n_numaux > 0) |
||
770 | fnend = bfd_asymbol_value (sym) + auxent.x_sym.x_misc.x_fsize; |
||
771 | else |
||
772 | fnend = 0; |
||
773 | linenos = BFD_SEND (abfd, _get_lineno, (abfd, sym)); |
||
774 | break; |
||
775 | } |
||
776 | type = parse_coff_type (abfd, &symbols, &types, this_coff_symno, |
||
777 | syment.n_type, paux, TRUE, dhandle); |
||
778 | if (type == DEBUG_TYPE_NULL) |
||
779 | return FALSE; |
||
780 | if (! parse_coff_symbol (abfd, &types, sym, this_coff_symno, &syment, |
||
781 | dhandle, type, within_function)) |
||
782 | return FALSE; |
||
783 | break; |
||
784 | |||
785 | case C_FCN: |
||
786 | if (strcmp (name, ".bf") == 0) |
||
787 | { |
||
788 | if (fnname == NULL) |
||
789 | { |
||
790 | non_fatal (_("%ld: .bf without preceding function"), |
||
791 | this_coff_symno); |
||
792 | return FALSE; |
||
793 | } |
||
794 | |||
795 | type = parse_coff_type (abfd, &symbols, &types, this_coff_symno, |
||
796 | DECREF (fntype), paux, FALSE, dhandle); |
||
797 | if (type == DEBUG_TYPE_NULL) |
||
798 | return FALSE; |
||
799 | |||
800 | if (! debug_record_function (dhandle, fnname, type, |
||
801 | external_coff_symbol_p (fnclass), |
||
802 | bfd_asymbol_value (sym))) |
||
803 | return FALSE; |
||
804 | |||
805 | if (linenos != NULL) |
||
806 | { |
||
807 | int base; |
||
808 | bfd_vma addr; |
||
809 | |||
810 | if (syment.n_numaux == 0) |
||
811 | base = 0; |
||
812 | else |
||
813 | base = auxent.x_sym.x_misc.x_lnsz.x_lnno - 1; |
||
814 | |||
815 | addr = bfd_get_section_vma (abfd, bfd_get_section (sym)); |
||
816 | |||
817 | ++linenos; |
||
818 | |||
819 | while (linenos->line_number != 0) |
||
820 | { |
||
821 | if (! debug_record_line (dhandle, |
||
822 | linenos->line_number + base, |
||
823 | linenos->u.offset + addr)) |
||
824 | return FALSE; |
||
825 | ++linenos; |
||
826 | } |
||
827 | } |
||
828 | |||
829 | fnname = NULL; |
||
830 | linenos = NULL; |
||
831 | fnclass = 0; |
||
832 | fntype = 0; |
||
833 | |||
834 | within_function = TRUE; |
||
835 | } |
||
836 | else if (strcmp (name, ".ef") == 0) |
||
837 | { |
||
838 | if (! within_function) |
||
839 | { |
||
840 | non_fatal (_("%ld: unexpected .ef\n"), this_coff_symno); |
||
841 | return FALSE; |
||
842 | } |
||
843 | |||
844 | if (bfd_asymbol_value (sym) > fnend) |
||
845 | fnend = bfd_asymbol_value (sym); |
||
846 | if (! debug_end_function (dhandle, fnend)) |
||
847 | return FALSE; |
||
848 | |||
849 | fnend = 0; |
||
850 | within_function = FALSE; |
||
851 | } |
||
852 | break; |
||
853 | |||
854 | case C_BLOCK: |
||
855 | if (strcmp (name, ".bb") == 0) |
||
856 | { |
||
857 | if (! debug_start_block (dhandle, bfd_asymbol_value (sym))) |
||
858 | return FALSE; |
||
859 | } |
||
860 | else if (strcmp (name, ".eb") == 0) |
||
861 | { |
||
862 | if (! debug_end_block (dhandle, bfd_asymbol_value (sym))) |
||
863 | return FALSE; |
||
864 | } |
||
865 | break; |
||
866 | |||
867 | default: |
||
868 | type = parse_coff_type (abfd, &symbols, &types, this_coff_symno, |
||
869 | syment.n_type, paux, TRUE, dhandle); |
||
870 | if (type == DEBUG_TYPE_NULL) |
||
871 | return FALSE; |
||
872 | if (! parse_coff_symbol (abfd, &types, sym, this_coff_symno, &syment, |
||
873 | dhandle, type, within_function)) |
||
874 | return FALSE; |
||
875 | break; |
||
876 | } |
||
877 | } |
||
878 | |||
879 | return TRUE; |
||
880 | }>=>>>>>=>=>> |