usr/src/cmd/sgs/libld/common/ldentry.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  *      Copyright (c) 1988 AT&T
  24  *        All Rights Reserved
  25  *
  26  * Copyright (c) 1992, 2010, Oracle and/or its affiliates. All rights reserved.
  27  */
  28
  29 #include        <stdio.h>
  30 #include        <string.h>
  31 #include        "msg.h"
  32 #include        "_libld.h"
  33
  34
  35 /*
  36  * Print a virtual address map of input and output sections together with
  37  * multiple symbol definitions (if they exist).
  38  */
  39 static Boolean  symbol_title = TRUE;
  40
  41 static void
  42 sym_muldef_title()
  43 {
  44         (void) printf(MSG_INTL(MSG_ENT_MUL_FMT_TIL_0),
  45             MSG_INTL(MSG_ENT_MUL_TIL_0));
  46         (void) printf(MSG_INTL(MSG_ENT_MUL_FMT_TIL_1),
  47             MSG_INTL(MSG_ENT_MUL_ITM_SYM),
  48             MSG_INTL(MSG_ENT_MUL_ITM_DEF_0),
  49             MSG_INTL(MSG_ENT_MUL_ITM_DEF_1));
  50         symbol_title = FALSE;
  51 }
  52
  53 void
  54 ld_map_out(Ofl_desc *ofl)
  55 {
  56         Sg_desc         *sgp;
  57         Is_desc         *isp;
  58         Sym_avlnode     *sav;
  59         Aliste          idx1;
  60
  61         (void) printf(MSG_INTL(MSG_ENT_MAP_FMT_TIL_1),
  62             MSG_INTL(MSG_ENT_MAP_TITLE_1));
  63         if (ofl->ofl_flags & FLG_OF_RELOBJ)
  64                 (void) printf(MSG_INTL(MSG_ENT_MAP_FMT_TIL_2),
  65                     MSG_INTL(MSG_ENT_ITM_OUTPUT),
  66                     MSG_INTL(MSG_ENT_ITM_INPUT),
  67                     MSG_INTL(MSG_ENT_ITM_NEW),
  68                     MSG_INTL(MSG_ENT_ITM_SECTION),
  69                     MSG_INTL(MSG_ENT_ITM_SECTION),
  70                     MSG_INTL(MSG_ENT_ITM_DISPMNT),
  71                     MSG_INTL(MSG_ENT_ITM_SIZE));
  72         else
  73                 (void) printf(MSG_INTL(MSG_ENT_MAP_FMT_TIL_3),
  74                     MSG_INTL(MSG_ENT_ITM_OUTPUT),
  75                     MSG_INTL(MSG_ENT_ITM_INPUT),
  76                     MSG_INTL(MSG_ENT_ITM_VIRTUAL),
  77                     MSG_INTL(MSG_ENT_ITM_SECTION),
  78                     MSG_INTL(MSG_ENT_ITM_SECTION),
  79                     MSG_INTL(MSG_ENT_ITM_ADDRESS),
  80                     MSG_INTL(MSG_ENT_ITM_SIZE));
  81
  82         for (APLIST_TRAVERSE(ofl->ofl_segs, idx1, sgp)) {
  83                 Os_desc *osp;
  84                 Aliste  idx2;
  85
  86                 if (sgp->sg_phdr.p_type != PT_LOAD)
  87                         continue;
  88
  89                 for (APLIST_TRAVERSE(sgp->sg_osdescs, idx2, osp)) {
  90                         int     os_isdescs_idx;
  91                         Aliste  idx3;
  92
  93                         (void) printf(MSG_INTL(MSG_ENT_MAP_ENTRY_1),
  94                             osp->os_name, EC_ADDR(osp->os_shdr->sh_addr),
  95                             EC_XWORD(osp->os_shdr->sh_size));
  96
  97                         OS_ISDESCS_TRAVERSE(os_isdescs_idx, osp, idx3, isp) {
  98                                 Addr    addr;
  99
 100                                 /*
 101                                  * Although there seems little point in printing
 102                                  * discarded (empty) sections, especially as
 103                                  * diagnostics under -Dsegments,details are more
 104                                  * informative, continue printing them.  There
 105                                  * are user scripts, fragile to say the least,
 106                                  * that grep(1) through load-map output to
 107                                  * discover object requirements.  These scripts
 108                                  * don't grep for all input sections types (ie.
 109                                  * .picdata), and have become dependent on null
 110                                  * sections (ie. .text) existing in the
 111                                  * load-map output.
 112                                  */
 113                                 if (isp->is_flags & FLG_IS_DISCARD) {
 114                                         addr = 0;
 115                                 } else {
 116                                         addr = (Addr)
 117                                             _elf_getxoff(isp->is_indata);
 118                                         if (!(ofl->ofl_flags & FLG_OF_RELOBJ))
 119                                                 addr += isp->is_osdesc->
 120                                                     os_shdr->sh_addr;
 121                                 }
 122
 123                                 (void) printf(MSG_INTL(MSG_ENT_MAP_ENTRY_2),
 124                                     isp->is_name, EC_ADDR(addr),
 125                                     EC_XWORD(isp->is_shdr->sh_size),
 126                                     ((isp->is_file != NULL) ?
 127                                     (char *)(isp->is_file->ifl_name) :
 128                                     MSG_INTL(MSG_STR_NULL)));
 129                         }
 130                 }
 131         }
 132
 133         if (ofl->ofl_flags & FLG_OF_RELOBJ)
 134                 return;
 135
 136         /*
 137          * Check for any multiply referenced symbols (ie. symbols that have
 138          * been overridden from a shared library).
 139          */
 140         for (sav = avl_first(&ofl->ofl_symavl); sav;
 141             sav = AVL_NEXT(&ofl->ofl_symavl, sav)) {
 142                 Sym_desc        *sdp = sav->sav_sdp;
 143                 const char      *name = sdp->sd_name, *ducp, *adcp;
 144                 APlist          *dfiles;
 145                 Aliste          idx;
 146
 147                 if (((dfiles = sdp->sd_aux->sa_dfiles) == NULL) ||
 148                     (aplist_nitems(dfiles) == 1))
 149                         continue;
 150
 151                 /*
 152                  * Files that define a symbol are saved on the `sa_dfiles' list.
 153                  * Ignore symbols that aren't needed, and any special symbols
 154                  * that the link editor may produce (symbols of type ABS and
 155                  * COMMON are not recorded in the first place, however functions
 156                  * like _init() and _fini() commonly have multiple occurrences).
 157                  */
 158                 if ((sdp->sd_ref == REF_DYN_SEEN) ||
 159                     (sdp->sd_aux && sdp->sd_aux->sa_symspec) ||
 160                     (strcmp(MSG_ORIG(MSG_SYM_FINI_U), name) == 0) ||
 161                     (strcmp(MSG_ORIG(MSG_SYM_INIT_U), name) == 0) ||
 162                     (strcmp(MSG_ORIG(MSG_SYM_LIBVER_U), name) == 0))
 163                         continue;
 164
 165                 if (symbol_title)
 166                         sym_muldef_title();
 167
 168                 ducp = sdp->sd_file->ifl_name;
 169                 (void) printf(MSG_INTL(MSG_ENT_MUL_ENTRY_1), demangle(name),
 170                     ducp);
 171                 for (APLIST_TRAVERSE(dfiles, idx, adcp)) {
 172                         /*
 173                          * Ignore the referenced symbol.
 174                          */
 175                         if (strcmp(adcp, ducp) != 0)
 176                                 (void) printf(MSG_INTL(MSG_ENT_MUL_ENTRY_2),
 177                                     adcp);
 178                 }
 179         }
 180 }
 181
 182 /*
 183  * Traverse the entrance criteria list searching for those sections that haven't
 184  * been met and print error message.  (only in the case of reordering)
 185  */
 186 void
 187 ld_ent_check(Ofl_desc * ofl)
 188 {
 189         Ent_desc        *enp;
 190         Aliste          ndx;
 191
 192         /*
 193          *  Try to give as much information to the user about the specific
 194          *  line in the mapfile.  If the line contains a file name then
 195          *  output the filename too.  Hence we have two warning lines -
 196          *  one for criterias where a filename is used and the other
 197          *  for those without a filename.
 198          */
 199         for (APLIST_TRAVERSE(ofl->ofl_ents, ndx, enp)) {
 200                 /*
 201                  * No warning if any of the following hold:
 202                  * -    The segment has no entrance criteria requiring
 203                  *      input section sorting (FLG_SG_IS_ORDER not set).
 204                  * -    The entrance criteria was used to place a section.
 205                  * -    The specific entrance criteria does not require sorting
 206                  */
 207                 if (((enp->ec_segment->sg_flags & FLG_SG_IS_ORDER) == 0) ||
 208                     (enp->ec_flags & FLG_EC_USED) || (enp->ec_ordndx == 0))
 209                         continue;
 210
 211
 212                 if (alist_nitems(enp->ec_files) > 0) {
 213                         ld_eprintf(ofl, ERR_WARNING, MSG_INTL(MSG_ENT_NOSEC_1),
 214                             enp->ec_segment->sg_name, enp->ec_is_name);
 215                 } else {
 216                         ld_eprintf(ofl, ERR_WARNING, MSG_INTL(MSG_ENT_NOSEC_2),
 217                             enp->ec_segment->sg_name, enp->ec_is_name);
 218                 }
 219         }
 220 }