gdb/xcoffsolib.c

   1 /* Shared library support for RS/6000 (xcoff) object files, for GDB.
   2    Copyright 1991, 1992 Free Software Foundation.
   3    Contributed by IBM Corporation.
   4
   5 This file is part of GDB.
   6
   7 This program is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2 of the License, or
  10 (at your option) any later version.
  11
  12 This program is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with this program; if not, write to the Free Software
  19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  20
  21 #if 0
  22 #include <sys/types.h>
  23 #include <sys/ldr.h>
  24 #endif
  25
  26 #include "defs.h"
  27 #include "bfd.h"
  28 #include "xcoffsolib.h"
  29 #include "inferior.h"
  30
  31 /* Hook to relocate symbols at runtime.  If gdb is build natively, this
  32    hook is initialized in by rs6000-nat.c.  If not, it is currently left
  33    NULL and never called. */
  34
  35 void (*xcoff_relocate_symtab_hook) PARAMS ((unsigned int)) = NULL;
  36
  37 #ifdef SOLIB_SYMBOLS_MANUAL
  38
  39 extern struct symtab *current_source_symtab;
  40 extern int            current_source_line;
  41
  42 /* The real work of adding a shared library file to the symtab and
  43    the section list.  */
  44
  45 void
  46 solib_add (arg_string, from_tty, target)
  47      char *arg_string;
  48      int from_tty;
  49      struct target_ops *target;
  50 {
  51   char *val;
  52   struct vmap *vp = vmap;
  53   struct objfile *obj;
  54   struct symtab *saved_symtab;
  55   int saved_line;
  56
  57   int loaded = 0;                       /* true if any shared obj loaded */
  58   int matched = 0;                      /* true if any shared obj matched */
  59
  60   if (arg_string == 0)
  61       re_comp (".");
  62   else if (val = (char *) re_comp (arg_string)) {
  63       error ("Invalid regexp: %s", val);
  64   }
  65   if (!vp || !vp->nxt)
  66     return;
  67
  68   /* save current symbol table and line number, in case they get changed
  69      in symbol loading process. */
  70
  71   saved_symtab = current_source_symtab;
  72   saved_line = current_source_line;
  73
  74   /* skip over the first vmap, it is the main program, always loaded. */
  75   vp = vp->nxt;
  76
  77   for (; vp; vp = vp->nxt) {
  78
  79     if (re_exec (vp->name) || (*vp->member && re_exec (vp->member))) {
  80
  81       matched = 1;
  82
  83       /* if already loaded, continue with the next one. */
  84       if (vp->loaded) {
  85
  86         printf_unfiltered ("%s%s%s%s: already loaded.\n",
  87           *vp->member ? "(" : "",
  88           vp->member,
  89           *vp->member ? ") " : "",
  90           vp->name);
  91         continue;
  92       }
  93
  94       printf_unfiltered ("Loading  %s%s%s%s...",
  95           *vp->member ? "(" : "",
  96           vp->member,
  97           *vp->member ? ") " : "",
  98           vp->name);
  99       gdb_flush (gdb_stdout);
 100
 101       /* This is gross and doesn't work.  If this code is re-enabled,
 102          just stick a objfile member into the struct vmap; that's the
 103          way solib.c (for SunOS/SVR4) does it.  */
 104         obj = lookup_objfile_bfd (vp->bfd);
 105         if (!obj) {
 106           warning ("\nObj structure for the shared object not found. Loading failed.");
 107           continue;
 108         }
 109
 110         syms_from_objfile (obj, 0, 0, 0);
 111         new_symfile_objfile (obj, 0, 0);
 112         vmap_symtab (vp, 0, 0);
 113         printf_unfiltered ("Done.\n");
 114         loaded = vp->loaded = 1;
 115     }
 116   }
 117   /* if any shared object is loaded, then misc_func_vector needs sorting. */
 118   if (loaded) {
 119 #if 0
 120     sort_misc_function_vector ();
 121 #endif
 122     current_source_symtab = saved_symtab;
 123     current_source_line = saved_line;
 124
 125     /* Getting new symbols might change our opinion about what is frameless.
 126        Is this correct?? FIXME. */
 127 /*    reinit_frame_cache(); */
 128   }
 129   else if (!matched)
 130     printf_unfiltered ("No matching shared object found.\n");
 131 }
 132 #endif /* SOLIB_SYMBOLS_MANUAL */
 133
 134 /* Return the module name of a given text address. Note that returned buffer
 135    is not persistent. */
 136
 137 char *
 138 pc_load_segment_name (addr)
 139 CORE_ADDR addr;
 140 {
 141    static char buffer [BUFSIZ];
 142    struct vmap *vp = vmap;
 143
 144    buffer [0] = buffer [1] = '\0';
 145    for (; vp; vp = vp->nxt)
 146      if (vp->tstart <= addr && addr < vp->tend) {
 147         if (*vp->member) {
 148           buffer [0] = '(';
 149           strcat (&buffer[1], vp->member);
 150           strcat (buffer, ")");
 151         }
 152         strcat (buffer, vp->name);
 153         return buffer;
 154      }
 155    return "(unknown load module)";
 156 }
 157
 158 static void solib_info PARAMS ((char *, int));
 159
 160 static void
 161 solib_info (args, from_tty)
 162      char *args;
 163      int from_tty;
 164 {
 165   struct vmap *vp = vmap;
 166
 167   /* Check for new shared libraries loaded with load ().  */
 168   if (xcoff_relocate_symtab_hook != NULL)
 169     (*xcoff_relocate_symtab_hook) (inferior_pid);
 170
 171   if (vp == NULL || vp->nxt == NULL)
 172     {
 173       printf_unfiltered ("No shared libraries loaded at this time.\n");
 174       return;
 175     }
 176
 177   /* Skip over the first vmap, it is the main program, always loaded.  */
 178   vp = vp->nxt;
 179
 180   printf_unfiltered ("\
 181 Text Range              Data Range              Syms    Shared Object Library\n");
 182
 183   for (; vp != NULL; vp = vp->nxt)
 184     {
 185       printf_unfiltered ("0x%08x-0x%08x 0x%08x-0x%08x   %s      %s%s%s%s\n",
 186                          vp->tstart, vp->tend,
 187                          vp->dstart, vp->dend,
 188                          vp->loaded ? "Yes" : "No ",
 189                          *vp->member ? "(" : "",
 190                          vp->member,
 191                          *vp->member ? ") " : "",
 192                          vp->name);
 193     }
 194 }
 195
 196 void
 197 sharedlibrary_command (args, from_tty)
 198      char *args;
 199      int from_tty;
 200 {
 201   dont_repeat ();
 202
 203   /* Check for new shared libraries loaded with load ().  */
 204   if (xcoff_relocate_symtab_hook != NULL)
 205     (*xcoff_relocate_symtab_hook) (inferior_pid);
 206
 207 #ifdef SOLIB_SYMBOLS_MANUAL
 208   solib_add (args, from_tty, (struct target_ops *)0);
 209 #endif /* SOLIB_SYMBOLS_MANUAL */
 210 }
 211
 212 void
 213 _initialize_solib()
 214 {
 215   add_com ("sharedlibrary", class_files, sharedlibrary_command,
 216            "Load shared object library symbols for files matching REGEXP.");
 217   add_info ("sharedlibrary", solib_info,
 218             "Status of loaded shared object libraries");
 219 }