external/bsd/elftoolchain/dist/libdwarf/libdwarf_sections.c

   1 /*      $NetBSD: libdwarf_sections.c,v 1.2 2014/03/09 16:58:04 christos Exp $   */
   2
   3 /*-
   4  * Copyright (c) 2010 Kai Wang
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  */
  28
  29 #include "_libdwarf.h"
  30
  31 __RCSID("$NetBSD: libdwarf_sections.c,v 1.2 2014/03/09 16:58:04 christos Exp $");
  32 ELFTC_VCSID("Id: libdwarf_sections.c 2379 2012-01-05 02:08:20Z jkoshy ");
  33
  34 #define _SECTION_INIT_SIZE      128
  35
  36 int
  37 _dwarf_section_init(Dwarf_P_Debug dbg, Dwarf_P_Section *dsp, const char *name,
  38     int pseudo, Dwarf_Error *error)
  39 {
  40         Dwarf_P_Section ds;
  41
  42         assert(dbg != NULL && dsp != NULL && name != NULL);
  43
  44         if ((ds = calloc(1, sizeof(struct _Dwarf_P_Section))) == NULL) {
  45                 DWARF_SET_ERROR(dbg, error, DW_DLE_MEMORY);
  46                 return (DW_DLE_MEMORY);
  47         }
  48
  49         if ((ds->ds_name = strdup(name)) == NULL) {
  50                 free(ds);
  51                 DWARF_SET_ERROR(dbg, error, DW_DLE_MEMORY);
  52                 return (DW_DLE_MEMORY);
  53         }
  54
  55         if (!pseudo) {
  56                 ds->ds_cap = _SECTION_INIT_SIZE;
  57                 if ((ds->ds_data = malloc((size_t) ds->ds_cap)) == NULL) {
  58                         free(ds->ds_name);
  59                         free(ds);
  60                         DWARF_SET_ERROR(dbg, error, DW_DLE_MEMORY);
  61                         return (DW_DLE_MEMORY);
  62                 }
  63                 STAILQ_INSERT_TAIL(&dbg->dbgp_seclist, ds, ds_next);
  64                 dbg->dbgp_seccnt++;
  65         }
  66
  67         *dsp = ds;
  68
  69         return (DW_DLE_NONE);
  70 }
  71
  72 void
  73 _dwarf_section_free(Dwarf_P_Debug dbg, Dwarf_P_Section *dsp)
  74 {
  75         Dwarf_P_Section ds, tds;
  76
  77         assert(dbg != NULL && dsp != NULL);
  78
  79         if (*dsp == NULL)
  80                 return;
  81
  82         STAILQ_FOREACH_SAFE(ds, &dbg->dbgp_seclist, ds_next, tds) {
  83                 if (ds == *dsp) {
  84                         STAILQ_REMOVE(&dbg->dbgp_seclist, ds, _Dwarf_P_Section,
  85                             ds_next);
  86                         dbg->dbgp_seccnt--;
  87                         break;
  88                 }
  89         }
  90         ds = *dsp;
  91         if (ds->ds_name)
  92                 free(ds->ds_name);
  93         if (ds->ds_data)
  94                 free(ds->ds_data);
  95         free(ds);
  96         *dsp = NULL;
  97 }
  98
  99 int
 100 _dwarf_pro_callback(Dwarf_P_Debug dbg, char *name, int size,
 101     Dwarf_Unsigned type, Dwarf_Unsigned flags, Dwarf_Unsigned link,
 102     Dwarf_Unsigned info, Dwarf_Unsigned *symndx, int *error)
 103 {
 104         int e, ret, isymndx;
 105
 106         assert(dbg != NULL && name != NULL && symndx != NULL);
 107
 108         if (dbg->dbgp_func_b)
 109                 ret = dbg->dbgp_func_b(name, size, type, flags, link, info,
 110                     symndx, &e);
 111         else {
 112                 ret = dbg->dbgp_func(name, size, type, flags, link, info,
 113                     &isymndx, &e);
 114                 *symndx = isymndx;
 115         }
 116         if (ret < 0) {
 117                 if (error)
 118                         *error = e;
 119         }
 120
 121         return (ret);
 122 }
 123
 124 int
 125 _dwarf_section_callback(Dwarf_P_Debug dbg, Dwarf_P_Section ds,
 126     Dwarf_Unsigned type, Dwarf_Unsigned flags, Dwarf_Unsigned link,
 127     Dwarf_Unsigned info, Dwarf_Error *error)
 128 {
 129         int ret, ndx;
 130
 131         ndx = _dwarf_pro_callback(dbg, ds->ds_name, (int) ds->ds_size,
 132             type, flags, link, info, &ds->ds_symndx, NULL);
 133         if (ndx < 0) {
 134                 ret = DW_DLE_ELF_SECT_ERR;
 135                 DWARF_SET_ERROR(dbg, error, ret);
 136                 return (ret);
 137         }
 138         ds->ds_ndx = ndx;
 139
 140         return (DW_DLE_NONE);
 141 }
 142
 143 int
 144 _dwarf_generate_sections(Dwarf_P_Debug dbg, Dwarf_Error *error)
 145 {
 146         int ret;
 147
 148         /* Produce .debug_info section. */
 149         if ((ret = _dwarf_info_gen(dbg, error)) != DW_DLE_NONE)
 150                 return (ret);
 151
 152         /* Produce .debug_abbrev section. */
 153         if ((ret = _dwarf_abbrev_gen(dbg, error)) != DW_DLE_NONE)
 154                 return (ret);
 155
 156         /* Produce .debug_line section. */
 157         if ((ret = _dwarf_lineno_gen(dbg, error)) != DW_DLE_NONE)
 158                 return (ret);
 159
 160         /* Produce .debug_frame section. */
 161         if ((ret = _dwarf_frame_gen(dbg, error)) != DW_DLE_NONE)
 162                 return (ret);
 163
 164         /* Produce .debug_aranges section. */
 165         if ((ret = _dwarf_arange_gen(dbg, error)) != DW_DLE_NONE)
 166                 return (ret);
 167
 168         /* Produce .debug_macinfo section. */
 169         if ((ret = _dwarf_macinfo_gen(dbg, error)) != DW_DLE_NONE)
 170                 return (ret);
 171
 172         /* Produce .debug_pubnames section. */
 173         if ((ret = _dwarf_nametbl_gen(dbg, ".debug_pubnames", dbg->dbgp_pubs,
 174             error)) != DW_DLE_NONE)
 175                 return (ret);
 176
 177         /* Produce .debug_weaknames section. */
 178         if ((ret = _dwarf_nametbl_gen(dbg, ".debug_weaknames", dbg->dbgp_weaks,
 179             error)) != DW_DLE_NONE)
 180                 return (ret);
 181
 182         /* Produce .debug_funcnames section. */
 183         if ((ret = _dwarf_nametbl_gen(dbg, ".debug_funcnames", dbg->dbgp_funcs,
 184             error)) != DW_DLE_NONE)
 185                 return (ret);
 186
 187         /* Produce .debug_typenames section. */
 188         if ((ret = _dwarf_nametbl_gen(dbg, ".debug_typenames", dbg->dbgp_types,
 189             error)) != DW_DLE_NONE)
 190                 return (ret);
 191
 192         /* Produce .debug_varnames section. */
 193         if ((ret = _dwarf_nametbl_gen(dbg, ".debug_varnames", dbg->dbgp_vars,
 194             error)) != DW_DLE_NONE)
 195                 return (ret);
 196
 197         /* Produce .debug_str section. */
 198         if ((ret = _dwarf_strtab_gen(dbg, error)) != DW_DLE_NONE)
 199                 return (ret);
 200
 201         /* Finally, update and generate all relocation sections. */
 202         if ((ret = _dwarf_reloc_gen(dbg, error)) != DW_DLE_NONE)
 203                 return (ret);
 204
 205         /* Set section/relocation iterator to the first element. */
 206         dbg->dbgp_secpos = STAILQ_FIRST(&dbg->dbgp_seclist);
 207         dbg->dbgp_drspos = STAILQ_FIRST(&dbg->dbgp_drslist);
 208
 209         return (DW_DLE_NONE);
 210 }
 211
 212 Dwarf_Section *
 213 _dwarf_find_section(Dwarf_Debug dbg, const char *name)
 214 {
 215         Dwarf_Section *ds;
 216         Dwarf_Half i;
 217
 218         assert(name != NULL);
 219
 220         for (i = 0; i < dbg->dbg_seccnt; i++) {
 221                 ds = &dbg->dbg_section[i];
 222                 if (ds->ds_name != NULL && !strcmp(ds->ds_name, name))
 223                         return (ds);
 224         }
 225
 226         return (NULL);
 227 }
 228
 229 Dwarf_P_Section
 230 _dwarf_pro_find_section(Dwarf_P_Debug dbg, const char *name)
 231 {
 232         Dwarf_P_Section ds;
 233
 234         assert(dbg != NULL && name != NULL);
 235
 236         STAILQ_FOREACH(ds, &dbg->dbgp_seclist, ds_next) {
 237                 if (ds->ds_name != NULL && !strcmp(ds->ds_name ,name))
 238                         return (ds);
 239         }
 240
 241         return (NULL);
 242 }
 243
 244 void
 245 _dwarf_section_cleanup(Dwarf_P_Debug dbg)
 246 {
 247         Dwarf_P_Section ds, tds;
 248
 249         assert(dbg != NULL && dbg->dbg_mode == DW_DLC_WRITE);
 250
 251         STAILQ_FOREACH_SAFE(ds, &dbg->dbgp_seclist, ds_next, tds) {
 252                 STAILQ_REMOVE(&dbg->dbgp_seclist, ds, _Dwarf_P_Section,
 253                     ds_next);
 254                 if (ds->ds_name)
 255                         free(ds->ds_name);
 256                 if (ds->ds_data)
 257                         free(ds->ds_data);
 258                 free(ds);
 259         }
 260         dbg->dbgp_seccnt = 0;
 261         dbg->dbgp_secpos = 0;
 262 }