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,
  20    Boston, MA 02111-1307, USA.  */
  21
  22 #if 0
  23 #include <sys/types.h>
  24 #include <sys/ldr.h>
  25 #endif
  26
  27 #include "defs.h"
  28 #include "bfd.h"
  29 #include "xcoffsolib.h"
  30 #include "inferior.h"
  31 #include "command.h"
  32
  33 /* Hook to relocate symbols at runtime.  If gdb is build natively, this
  34    hook is initialized in by rs6000-nat.c.  If not, it is currently left
  35    NULL and never called. */
  36
  37 void (*xcoff_relocate_symtab_hook) (unsigned int) = NULL;
  38
  39 #ifdef SOLIB_SYMBOLS_MANUAL
  40
  41 extern struct symtab *current_source_symtab;
  42 extern int current_source_line;
  43
  44 /* The real work of adding a shared library file to the symtab and
  45    the section list.  */
  46
  47 void
  48 solib_add (char *arg_string, int from_tty, struct target_ops *target)
  49 {
  50   char *val;
  51   struct vmap *vp = vmap;
  52   struct objfile *obj;
  53   struct symtab *saved_symtab;
  54   int saved_line;
  55
  56   int loaded = 0;               /* true if any shared obj loaded */
  57   int matched = 0;              /* true if any shared obj matched */
  58
  59   if (arg_string == 0)
  60     re_comp (".");
  61   else if (val = (char *) re_comp (arg_string))
  62     {
  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
  80       if (re_exec (vp->name) || (*vp->member && re_exec (vp->member)))
  81         {
  82
  83           matched = 1;
  84
  85           /* if already loaded, continue with the next one. */
  86           if (vp->loaded)
  87             {
  88
  89               printf_unfiltered ("%s%s%s%s: already loaded.\n",
  90                                  *vp->member ? "(" : "",
  91                                  vp->member,
  92                                  *vp->member ? ") " : "",
  93                                  vp->name);
  94               continue;
  95             }
  96
  97           printf_unfiltered ("Loading  %s%s%s%s...",
  98                              *vp->member ? "(" : "",
  99                              vp->member,
 100                              *vp->member ? ") " : "",
 101                              vp->name);
 102           gdb_flush (gdb_stdout);
 103
 104           /* This is gross and doesn't work.  If this code is re-enabled,
 105              just stick a objfile member into the struct vmap; that's the
 106              way solib.c (for SunOS/SVR4) does it.  */
 107           obj = lookup_objfile_bfd (vp->bfd);
 108           if (!obj)
 109             {
 110               warning ("\nObj structure for the shared object not found. Loading failed.");
 111               continue;
 112             }
 113
 114           syms_from_objfile (obj, NULL, 0, 0);
 115           new_symfile_objfile (obj, 0, 0);
 116           vmap_symtab (vp);
 117           printf_unfiltered ("Done.\n");
 118           loaded = vp->loaded = 1;
 119         }
 120     }
 121   /* if any shared object is loaded, then misc_func_vector needs sorting. */
 122   if (loaded)
 123     {
 124 #if 0
 125       sort_misc_function_vector ();
 126 #endif
 127       current_source_symtab = saved_symtab;
 128       current_source_line = saved_line;
 129
 130       /* Getting new symbols might change our opinion about what is frameless.
 131          Is this correct?? FIXME. */
 132 /*    reinit_frame_cache(); */
 133     }
 134   else if (!matched)
 135     printf_unfiltered ("No matching shared object found.\n");
 136 }
 137 #endif /* SOLIB_SYMBOLS_MANUAL */
 138
 139 /* Return the module name of a given text address. Note that returned buffer
 140    is not persistent. */
 141
 142 char *
 143 pc_load_segment_name (CORE_ADDR addr)
 144 {
 145   static char buffer[BUFSIZ];
 146   struct vmap *vp = vmap;
 147
 148   buffer[0] = buffer[1] = '\0';
 149   for (; vp; vp = vp->nxt)
 150     if (vp->tstart <= addr && addr < vp->tend)
 151       {
 152         if (*vp->member)
 153           {
 154             buffer[0] = '(';
 155             strcat (&buffer[1], vp->member);
 156             strcat (buffer, ")");
 157           }
 158         strcat (buffer, vp->name);
 159         return buffer;
 160       }
 161   return "(unknown load module)";
 162 }
 163
 164 static void solib_info (char *, int);
 165
 166 static void
 167 solib_info (char *args, int from_tty)
 168 {
 169   struct vmap *vp = vmap;
 170
 171   /* Check for new shared libraries loaded with load ().  */
 172   if (xcoff_relocate_symtab_hook != NULL)
 173     (*xcoff_relocate_symtab_hook) (inferior_pid);
 174
 175   if (vp == NULL || vp->nxt == NULL)
 176     {
 177       printf_unfiltered ("No shared libraries loaded at this time.\n");
 178       return;
 179     }
 180
 181   /* Skip over the first vmap, it is the main program, always loaded.  */
 182   vp = vp->nxt;
 183
 184   printf_unfiltered ("\
 185 Text Range              Data Range              Syms    Shared Object Library\n");
 186
 187   for (; vp != NULL; vp = vp->nxt)
 188     {
 189       printf_unfiltered ("0x%s-0x%s     0x%s-0x%s       %s      %s%s%s%s\n",
 190                          paddr (vp->tstart),paddr (vp->tend),
 191                          paddr (vp->dstart), paddr (vp->dend),
 192                          vp->loaded ? "Yes" : "No ",
 193                          *vp->member ? "(" : "",
 194                          vp->member,
 195                          *vp->member ? ") " : "",
 196                          vp->name);
 197     }
 198 }
 199
 200 void
 201 sharedlibrary_command (char *args, int from_tty)
 202 {
 203   dont_repeat ();
 204
 205   /* Check for new shared libraries loaded with load ().  */
 206   if (xcoff_relocate_symtab_hook != NULL)
 207     (*xcoff_relocate_symtab_hook) (inferior_pid);
 208
 209 #ifdef SOLIB_SYMBOLS_MANUAL
 210   solib_add (args, from_tty, (struct target_ops *) 0);
 211 #endif /* SOLIB_SYMBOLS_MANUAL */
 212 }
 213
 214 void
 215 _initialize_solib (void)
 216 {
 217   add_com ("sharedlibrary", class_files, sharedlibrary_command,
 218            "Load shared object library symbols for files matching REGEXP.");
 219   add_info ("sharedlibrary", solib_info,
 220             "Status of loaded shared object libraries");
 221 }