Merge to Cygnus 961112 + add some support (not ready) for shared libs

1 files changed, 220 insertions, 0 deletions

diff --git a/gnu/usr.bin/binutils/gdb/xcoffsolib.c b/gnu/usr.bin/binutils/gdb/xcoffsolib.c
new file mode 100644
index 00000000000..13d8065ea1d
--- /dev/null
+++ b/gnu/usr.bin/binutils/gdb/xcoffsolib.c
@@ -0,0 +1,220 @@
+/* Shared library support for RS/6000 (xcoff) object files, for GDB.
+   Copyright 1991, 1992 Free Software Foundation.
+   Contributed by IBM Corporation.
+
+This file is part of GDB.
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+#if 0
+#include <sys/types.h>
+#include <sys/ldr.h>
+#endif
+
+#include "defs.h"
+#include "bfd.h"
+#include "xcoffsolib.h"
+#include "inferior.h"
+#include "command.h"
+
+/* Hook to relocate symbols at runtime.  If gdb is build natively, this
+   hook is initialized in by rs6000-nat.c.  If not, it is currently left
+   NULL and never called. */
+
+void (*xcoff_relocate_symtab_hook) PARAMS ((unsigned int)) = NULL;
+
+#ifdef SOLIB_SYMBOLS_MANUAL
+
+extern struct symtab *current_source_symtab;
+extern int	      current_source_line;
+
+/* The real work of adding a shared library file to the symtab and
+   the section list.  */
+
+void
+solib_add (arg_string, from_tty, target)
+     char *arg_string;
+     int from_tty;
+     struct target_ops *target;
+{	
+  char *val;
+  struct vmap *vp = vmap;
+  struct objfile *obj;
+  struct symtab *saved_symtab;
+  int saved_line;
+
+  int loaded = 0;			/* true if any shared obj loaded */
+  int matched = 0;			/* true if any shared obj matched */
+
+  if (arg_string == 0)
+      re_comp (".");
+  else if (val = (char *) re_comp (arg_string)) {
+      error ("Invalid regexp: %s", val);
+  }
+  if (!vp || !vp->nxt)
+    return;
+
+  /* save current symbol table and line number, in case they get changed
+     in symbol loading process. */
+ 
+  saved_symtab = current_source_symtab;
+  saved_line = current_source_line;
+
+  /* skip over the first vmap, it is the main program, always loaded. */
+  vp = vp->nxt;
+
+  for (; vp; vp = vp->nxt) {
+
+    if (re_exec (vp->name) || (*vp->member && re_exec (vp->member))) {
+
+      matched = 1;
+
+      /* if already loaded, continue with the next one. */
+      if (vp->loaded) {
+	
+	printf_unfiltered ("%s%s%s%s: already loaded.\n",
+	  *vp->member ? "(" : "",
+	  vp->member,
+	  *vp->member ? ") " : "",
+	  vp->name);
+	continue;
+      }
+
+      printf_unfiltered ("Loading  %s%s%s%s...",
+	  *vp->member ? "(" : "",
+	  vp->member,
+	  *vp->member ? ") " : "",
+	  vp->name);
+      gdb_flush (gdb_stdout);
+
+      /* This is gross and doesn't work.  If this code is re-enabled,
+	 just stick a objfile member into the struct vmap; that's the
+	 way solib.c (for SunOS/SVR4) does it.  */
+	obj = lookup_objfile_bfd (vp->bfd);
+	if (!obj) {
+	  warning ("\nObj structure for the shared object not found. Loading failed.");
+	  continue;
+	}
+
+	syms_from_objfile (obj, 0, 0, 0);
+	new_symfile_objfile (obj, 0, 0);
+	vmap_symtab (vp, 0, 0);
+	printf_unfiltered ("Done.\n");
+	loaded = vp->loaded = 1;
+    }
+  }
+  /* if any shared object is loaded, then misc_func_vector needs sorting. */
+  if (loaded) {
+#if 0
+    sort_misc_function_vector ();
+#endif
+    current_source_symtab = saved_symtab;
+    current_source_line = saved_line;
+
+    /* Getting new symbols might change our opinion about what is frameless.
+       Is this correct?? FIXME. */
+/*    reinit_frame_cache(); */
+  }
+  else if (!matched)
+    printf_unfiltered ("No matching shared object found.\n");
+}
+#endif /* SOLIB_SYMBOLS_MANUAL */
+
+/* Return the module name of a given text address. Note that returned buffer
+   is not persistent. */
+
+char *
+pc_load_segment_name (addr)
+CORE_ADDR addr;
+{
+   static char buffer [BUFSIZ];
+   struct vmap *vp = vmap;
+
+   buffer [0] = buffer [1] = '\0';
+   for (; vp; vp = vp->nxt)
+     if (vp->tstart <= addr && addr < vp->tend) {
+	if (*vp->member) {
+	  buffer [0] = '(';
+	  strcat (&buffer[1], vp->member);
+	  strcat (buffer, ")");
+	}
+	strcat (buffer, vp->name);
+	return buffer;
+     }
+   return "(unknown load module)";
+}
+
+static void solib_info PARAMS ((char *, int));
+
+static void
+solib_info (args, from_tty)
+     char *args;
+     int from_tty;
+{
+  struct vmap *vp = vmap;
+
+  /* Check for new shared libraries loaded with load ().  */
+  if (xcoff_relocate_symtab_hook != NULL)
+    (*xcoff_relocate_symtab_hook) (inferior_pid);
+
+  if (vp == NULL || vp->nxt == NULL)
+    {
+      printf_unfiltered ("No shared libraries loaded at this time.\n");	
+      return;
+    }
+
+  /* Skip over the first vmap, it is the main program, always loaded.  */
+  vp = vp->nxt;
+
+  printf_unfiltered ("\
+Text Range		Data Range		Syms	Shared Object Library\n");
+
+  for (; vp != NULL; vp = vp->nxt)
+    {
+      printf_unfiltered ("0x%08x-0x%08x	0x%08x-0x%08x	%s	%s%s%s%s\n",
+			 vp->tstart, vp->tend,
+			 vp->dstart, vp->dend,
+			 vp->loaded ? "Yes" : "No ",
+			 *vp->member ? "(" : "",
+			 vp->member,
+			 *vp->member ? ") " : "",
+			 vp->name);
+    }
+}
+
+void
+sharedlibrary_command (args, from_tty)
+     char *args;
+     int from_tty;
+{
+  dont_repeat ();
+
+  /* Check for new shared libraries loaded with load ().  */
+  if (xcoff_relocate_symtab_hook != NULL)
+    (*xcoff_relocate_symtab_hook) (inferior_pid);
+
+#ifdef SOLIB_SYMBOLS_MANUAL
+  solib_add (args, from_tty, (struct target_ops *)0);
+#endif /* SOLIB_SYMBOLS_MANUAL */
+}
+
+void
+_initialize_solib()
+{
+  add_com ("sharedlibrary", class_files, sharedlibrary_command,
+	   "Load shared object library symbols for files matching REGEXP.");
+  add_info ("sharedlibrary", solib_info, 
+	    "Status of loaded shared object libraries");
+}