1 /* 2 3 Copyright (C) 2000,2004 Silicon Graphics, Inc. All Rights Reserved. 4 5 This program is free software; you can redistribute it and/or modify it 6 under the terms of version 2.1 of the GNU Lesser General Public License 7 as published by the Free Software Foundation. 8 9 This program is distributed in the hope that it would be useful, but 10 WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 12 13 Further, this software is distributed without any warranty that it is 14 free of the rightful claim of any third person regarding infringement 15 or the like. Any license provided herein, whether implied or 16 otherwise, applies only to this software file. Patent licenses, if 17 any, provided herein do not apply to combinations of this program with 18 other software, or any other product whatsoever. 19 20 You should have received a copy of the GNU Lesser General Public 21 License along with this program; if not, write the Free Software 22 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston MA 02110-1301, 23 USA. 24 25 Contact information: Silicon Graphics, Inc., 1500 Crittenden Lane, 26 Mountain View, CA 94043, or: 27 28 http://www.sgi.com 29 30 For further information regarding this notice, see: 31 32 http://oss.sgi.com/projects/GenInfo/NoticeExplan 33 34 */ 35 36 37 38 #include "config.h" 39 #include "libdwarfdefs.h" 40 #include <stdio.h> 41 #include <string.h> 42 #ifdef HAVE_ELFACCESS_H 43 #include <elfaccess.h> 44 #endif 45 #include "pro_incl.h" 46 #include "pro_section.h" 47 48 49 /* 50 This function adds another type name to the 51 list of type names for the given Dwarf_P_Debug. 52 It returns 0 on error, and 1 otherwise. 53 */ 54 Dwarf_Unsigned 55 dwarf_add_typename(Dwarf_P_Debug dbg, 56 Dwarf_P_Die die, 57 char *type_name, Dwarf_Error * error) 58 { 59 return 60 _dwarf_add_simple_name_entry(dbg, die, type_name, 61 dwarf_snk_typename, error); 62 } 63 64 /* 65 The following is the generic 'add a simple name entry' 66 for any of the simple name sections. 67 68 See enum dwarf_sn_kind in pro_opaque.h 69 70 */ 71 Dwarf_Unsigned 72 _dwarf_add_simple_name_entry(Dwarf_P_Debug dbg, 73 Dwarf_P_Die die, 74 char *entry_name, 75 enum dwarf_sn_kind entrykind, 76 Dwarf_Error * error) 77 { 78 Dwarf_P_Simple_nameentry nameentry; 79 Dwarf_P_Simple_name_header hdr; 80 char *name; 81 int uword_size; 82 83 if (dbg == NULL) { 84 _dwarf_p_error(NULL, error, DW_DLE_DBG_NULL); 85 return (0); 86 } 87 88 if (die == NULL) { 89 _dwarf_p_error(NULL, error, DW_DLE_DIE_NULL); 90 return (0); 91 } 92 93 94 nameentry = (Dwarf_P_Simple_nameentry) 95 _dwarf_p_get_alloc(dbg, 96 sizeof(struct Dwarf_P_Simple_nameentry_s)); 97 if (nameentry == NULL) { 98 _dwarf_p_error(dbg, error, DW_DLE_ALLOC_FAIL); 99 return (0); 100 } 101 102 name = _dwarf_p_get_alloc(dbg, strlen(entry_name) + 1); 103 if (name == NULL) { 104 _dwarf_p_error(dbg, error, DW_DLE_ALLOC_FAIL); 105 return (0); 106 } 107 strcpy(name, entry_name); 108 109 nameentry->sne_die = die; 110 nameentry->sne_name = name; 111 nameentry->sne_name_len = strlen(name); 112 uword_size = dbg->de_offset_size; 113 114 hdr = &dbg->de_simple_name_headers[entrykind]; 115 if (hdr->sn_head == NULL) 116 hdr->sn_head = hdr->sn_tail = nameentry; 117 else { 118 hdr->sn_tail->sne_next = nameentry; 119 hdr->sn_tail = nameentry; 120 } 121 hdr->sn_count++; 122 hdr->sn_net_len += uword_size + nameentry->sne_name_len + 1; 123 124 return (1); 125 } 126 127 128 129 /* 130 _dwarf_transform_simplename_to_disk writes 131 ".rel.debug_pubnames", 132 ".rel.debug_funcnames", sgi extension 133 ".rel.debug_typenames", sgi extension 134 ".rel.debug_varnames", sgi extension 135 ".rel.debug_weaknames", sgi extension 136 to disk. 137 section_index indexes one of those sections. 138 entrykind is one of those 'kind's. 139 140 */ 141 int 142 _dwarf_transform_simplename_to_disk(Dwarf_P_Debug dbg, enum dwarf_sn_kind entrykind, int section_index, /* in 143 de_elf_sects 144 etc 145 */ 146 Dwarf_Error * error) 147 { 148 149 150 /* Used to fill in 0. */ 151 const Dwarf_Signed big_zero = 0; 152 153 /* Used to scan the section data buffers. */ 154 Dwarf_P_Section_Data debug_sect; 155 156 Dwarf_Signed debug_info_size; 157 158 Dwarf_P_Simple_nameentry nameentry_original; 159 Dwarf_P_Simple_nameentry nameentry; 160 Dwarf_Small *stream_bytes; 161 Dwarf_Small *cur_stream_bytes_ptr; 162 Dwarf_Unsigned stream_bytes_count; 163 Dwarf_Unsigned adjusted_length; /* count excluding length field 164 */ 165 166 167 int uword_size = dbg->de_offset_size; 168 int extension_size = dbg->de_64bit_extension ? 4 : 0; 169 170 Dwarf_P_Simple_name_header hdr; 171 172 173 /* ***** BEGIN CODE ***** */ 174 175 debug_info_size = 0; 176 for (debug_sect = dbg->de_debug_sects; debug_sect != NULL; 177 debug_sect = debug_sect->ds_next) { 178 /* We want the size of the .debug_info section for this CU 179 because the dwarf spec requires us to output it below so we 180 look for it specifically. */ 181 if (debug_sect->ds_elf_sect_no == dbg->de_elf_sects[DEBUG_INFO]) { 182 debug_info_size += debug_sect->ds_nbytes; 183 } 184 } 185 186 hdr = &dbg->de_simple_name_headers[entrykind]; 187 /* Size of the .debug_typenames (or similar) section header. */ 188 stream_bytes_count = extension_size + uword_size + /* Size of 189 length 190 field. */ 191 sizeof(Dwarf_Half) + /* Size of version field. */ 192 uword_size + /* Size of .debug_info offset. */ 193 uword_size; /* Size of .debug_names. */ 194 195 196 197 nameentry_original = hdr->sn_head; 198 nameentry = nameentry_original; 199 /* add in the content size */ 200 stream_bytes_count += hdr->sn_net_len; 201 202 /* Size of the last 0 offset. */ 203 stream_bytes_count += uword_size; 204 205 /* Now we know how long the entire section is */ 206 GET_CHUNK(dbg, dbg->de_elf_sects[section_index], 207 stream_bytes, (unsigned long) stream_bytes_count, error); 208 if (stream_bytes == NULL) { 209 _dwarf_p_error(dbg, error, DW_DLE_ALLOC_FAIL); 210 return (0); 211 } 212 cur_stream_bytes_ptr = stream_bytes; 213 214 if (extension_size) { 215 Dwarf_Unsigned x = DISTINGUISHED_VALUE; 216 217 WRITE_UNALIGNED(dbg, cur_stream_bytes_ptr, 218 (const void *) &x, sizeof(x), extension_size); 219 cur_stream_bytes_ptr += extension_size; 220 221 } 222 /* Write the adjusted length of .debug_*names section. */ 223 adjusted_length = stream_bytes_count - uword_size - extension_size; 224 WRITE_UNALIGNED(dbg, cur_stream_bytes_ptr, 225 (const void *) &adjusted_length, 226 sizeof(adjusted_length), uword_size); 227 cur_stream_bytes_ptr += uword_size; 228 229 /* Write the version as 2 bytes. */ 230 { 231 Dwarf_Half verstamp = CURRENT_VERSION_STAMP; 232 233 WRITE_UNALIGNED(dbg, cur_stream_bytes_ptr, 234 (const void *) &verstamp, 235 sizeof(verstamp), sizeof(Dwarf_Half)); 236 cur_stream_bytes_ptr += sizeof(Dwarf_Half); 237 } 238 239 /* Write the offset of the compile-unit. */ 240 WRITE_UNALIGNED(dbg, cur_stream_bytes_ptr, 241 (const void *) &big_zero, 242 sizeof(big_zero), uword_size); 243 cur_stream_bytes_ptr += uword_size; 244 245 /* now create the relocation for the compile_unit offset */ 246 { 247 int res = dbg->de_reloc_name(dbg, 248 section_index, 249 extension_size + uword_size + 250 sizeof(Dwarf_Half) 251 /* r_offset */ 252 , 253 /* debug_info section name symbol */ 254 dbg->de_sect_name_idx[DEBUG_INFO], 255 dwarf_drt_data_reloc, 256 uword_size); 257 258 if (res != DW_DLV_OK) { 259 { 260 _dwarf_p_error(dbg, error, DW_DLE_ALLOC_FAIL); 261 return (0); 262 } 263 } 264 } 265 266 /* Write the size of .debug_info section. */ 267 WRITE_UNALIGNED(dbg, cur_stream_bytes_ptr, 268 (const void *) &debug_info_size, 269 sizeof(debug_info_size), uword_size); 270 cur_stream_bytes_ptr += uword_size; 271 272 273 for (nameentry = nameentry_original; 274 nameentry != NULL; nameentry = nameentry->sne_next) { 275 276 /* Copy offset of die from start of compile-unit. */ 277 WRITE_UNALIGNED(dbg, cur_stream_bytes_ptr, 278 (const void *) &nameentry->sne_die->di_offset, 279 sizeof(nameentry->sne_die->di_offset), 280 uword_size); 281 cur_stream_bytes_ptr += uword_size; 282 283 /* Copy the type name. */ 284 strcpy((char *) cur_stream_bytes_ptr, nameentry->sne_name); 285 cur_stream_bytes_ptr += nameentry->sne_name_len + 1; 286 } 287 288 WRITE_UNALIGNED(dbg, cur_stream_bytes_ptr, 289 (const void *) &big_zero, 290 sizeof(big_zero), uword_size); 291 292 293 294 295 return (int) dbg->de_n_debug_sect; 296 } 297