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 #include "command.h"
  31
  32 /* Hook to relocate symbols at runtime.  If gdb is build natively, this
  33    hook is initialized in by rs6000-nat.c.  If not, it is currently left
  34    NULL and never called. */
  35
  36 void (*xcoff_relocate_symtab_hook) PARAMS ((unsigned int)) = NULL;
  37
  38 #ifdef SOLIB_SYMBOLS_MANUAL
  39
  40 extern struct symtab *current_source_symtab;
  41 extern int            current_source_line;
  42
  43 /* The real work of adding a shared library file to the symtab and
  44    the section list.  */
  45
  46 void
  47 solib_add (arg_string, from_tty, target)
  48      char *arg_string;
  49      int from_tty;
  50      struct target_ops *target;
  51 {
  52   char *val;
  53   struct vmap *vp = vmap;
  54   struct objfile *obj;
  55   struct symtab *saved_symtab;
  56   int saved_line;
  57
  58   int loaded = 0;                       /* true if any shared obj loaded */
  59   int matched = 0;                      /* true if any shared obj matched */
  60
  61   if (arg_string == 0)
  62       re_comp (".");
  63   else if (val = (char *) re_comp (arg_string)) {
  64       error ("Invalid regexp: %s", val);
  65   }
  66   if (!vp || !vp->nxt)
  67     return;
  68
  69   /* save current symbol table and line number, in case they get changed
  70      in symbol loading process. */
  71
  72   saved_symtab = current_source_symtab;
  73   saved_line = current_source_line;
  74
  75   /* skip over the first vmap, it is the main program, always loaded. */
  76   vp = vp->nxt;
  77
  78   for (; vp; vp = vp->nxt) {
  79
  80     if (re_exec (vp->name) || (*vp->member && re_exec (vp->member))) {
  81
  82       matched = 1;
  83
  84       /* if already loaded, continue with the next one. */
  85       if (vp->loaded) {
  86
  87         printf_unfiltered ("%s%s%s%s: already loaded.\n",
  88           *vp->member ? "(" : "",
  89           vp->member,
  90           *vp->member ? ") " : "",
  91           vp->name);
  92         continue;
  93       }
  94
  95       printf_unfiltered ("Loading  %s%s%s%s...",
  96           *vp->member ? "(" : "",
  97           vp->member,
  98           *vp->member ? ") " : "",
  99           vp->name);
 100       gdb_flush (gdb_stdout);
 101
 102       /* This is gross and doesn't work.  If this code is re-enabled,
 103          just stick a objfile member into the struct vmap; that's the
 104          way solib.c (for SunOS/SVR4) does it.  */
 105         obj = lookup_objfile_bfd (vp->bfd);
 106         if (!obj) {
 107           warning ("\nObj structure for the shared object not found. Loading failed.");
 108           continue;
 109         }
 110
 111         syms_from_objfile (obj, 0, 0, 0);
 112         new_symfile_objfile (obj, 0, 0);
 113         vmap_symtab (vp, 0, 0);
 114         printf_unfiltered ("Done.\n");
 115         loaded = vp->loaded = 1;
 116     }
 117   }
 118   /* if any shared object is loaded, then misc_func_vector needs sorting. */
 119   if (loaded) {
 120 #if 0
 121     sort_misc_function_vector ();
 122 #endif
 123     current_source_symtab = saved_symtab;
 124     current_source_line = saved_line;
 125
 126     /* Getting new symbols might change our opinion about what is frameless.
 127        Is this correct?? FIXME. */
 128 /*    reinit_frame_cache(); */
 129   }
 130   else if (!matched)
 131     printf_unfiltered ("No matching shared object found.\n");
 132 }
 133 #endif /* SOLIB_SYMBOLS_MANUAL */
 134
 135 /* Return the module name of a given text address. Note that returned buffer
 136    is not persistent. */
 137
 138 char *
 139 pc_load_segment_name (addr)
 140 CORE_ADDR addr;
 141 {
 142    static char buffer [BUFSIZ];
 143    struct vmap *vp = vmap;
 144
 145    buffer [0] = buffer [1] = '\0';
 146    for (; vp; vp = vp->nxt)
 147      if (vp->tstart <= addr && addr < vp->tend) {
 148         if (*vp->member) {
 149           buffer [0] = '(';
 150           strcat (&buffer[1], vp->member);
 151           strcat (buffer, ")");
 152         }
 153         strcat (buffer, vp->name);
 154         return buffer;
 155      }
 156    return "(unknown load module)";
 157 }
 158
 159 static void solib_info PARAMS ((char *, int));
 160
 161 static void
 162 solib_info (args, from_tty)
 163      char *args;
 164      int from_tty;
 165 {
 166   struct vmap *vp = vmap;
 167
 168   /* Check for new shared libraries loaded with load ().  */
 169   if (xcoff_relocate_symtab_hook != NULL)
 170     (*xcoff_relocate_symtab_hook) (inferior_pid);
 171
 172   if (vp == NULL || vp->nxt == NULL)
 173     {
 174       printf_unfiltered ("No shared libraries loaded at this time.\n");
 175       return;
 176     }
 177
 178   /* Skip over the first vmap, it is the main program, always loaded.  */
 179   vp = vp->nxt;
 180
 181   printf_unfiltered ("\
 182 Text Range              Data Range              Syms    Shared Object Library\n");
 183
 184   for (; vp != NULL; vp = vp->nxt)
 185     {
 186       printf_unfiltered ("0x%08x-0x%08x 0x%08x-0x%08x   %s      %s%s%s%s\n",
 187                          vp->tstart, vp->tend,
 188                          vp->dstart, vp->dend,
 189                          vp->loaded ? "Yes" : "No ",
 190                          *vp->member ? "(" : "",
 191                          vp->member,
 192                          *vp->member ? ") " : "",
 193                          vp->name);
 194     }
 195 }
 196
 197 void
 198 sharedlibrary_command (args, from_tty)
 199      char *args;
 200      int from_tty;
 201 {
 202   dont_repeat ();
 203
 204   /* Check for new shared libraries loaded with load ().  */
 205   if (xcoff_relocate_symtab_hook != NULL)
 206     (*xcoff_relocate_symtab_hook) (inferior_pid);
 207
 208 #ifdef SOLIB_SYMBOLS_MANUAL
 209   solib_add (args, from_tty, (struct target_ops *)0);
 210 #endif /* SOLIB_SYMBOLS_MANUAL */
 211 }
 212
 213 void
 214 _initialize_solib()
 215 {
 216   add_com ("sharedlibrary", class_files, sharedlibrary_command,
 217            "Load shared object library symbols for files matching REGEXP.");
 218   add_info ("sharedlibrary", solib_info,
 219             "Status of loaded shared object libraries");
 220 }