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

1 files changed, 131 insertions, 0 deletions

diff --git a/gnu/usr.bin/binutils/gdb/coff-solib.c b/gnu/usr.bin/binutils/gdb/coff-solib.c
new file mode 100644
index 00000000000..c0cfcf5d7bd
--- /dev/null
+++ b/gnu/usr.bin/binutils/gdb/coff-solib.c
@@ -0,0 +1,131 @@
+/* Handle COFF SVR3 shared libraries for GDB, the GNU Debugger.
+   Copyright 1993 Free Software Foundation, Inc.
+   
+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.  */
+
+
+#include "defs.h"
+
+#include "frame.h"
+#include "bfd.h"
+#include "gdbcore.h"
+#include "symtab.h"
+
+/*
+
+GLOBAL FUNCTION
+
+	coff_solib_add -- add a shared library files to the symtab list.  We
+	examine the `.lib' section of the exec file and determine the names of
+	the shared libraries.
+
+	This function is responsible for discovering those names and
+	addresses, and saving sufficient information about them to allow
+	their symbols to be read at a later time.
+
+SYNOPSIS
+
+	void coff_solib_add (char *arg_string, int from_tty,
+			     struct target_ops *target)
+
+DESCRIPTION
+
+*/
+
+void
+coff_solib_add (arg_string, from_tty, target)
+     char *arg_string;
+     int from_tty;
+     struct target_ops *target;
+{	
+  asection *libsect;
+
+  libsect = bfd_get_section_by_name (exec_bfd, ".lib");
+
+  if (libsect)
+    {
+      int libsize;
+      unsigned char *lib;
+      struct libent
+	{
+	  bfd_byte len[4];
+	  bfd_byte nameoffset[4];
+	};
+
+      libsize = bfd_section_size (exec_bfd, libsect);
+
+      lib = (unsigned char *) alloca (libsize);
+
+      bfd_get_section_contents (exec_bfd, libsect, lib, 0, libsize);
+
+      while (libsize > 0)
+	{
+	  struct libent *ent;
+	  struct objfile *objfile;
+	  int len, nameoffset;
+	  char *filename;
+
+	  ent = (struct libent *)lib;
+
+	  len = bfd_get_32 (exec_bfd, ent->len);
+
+	  nameoffset = bfd_get_32 (exec_bfd, ent->nameoffset);
+
+	  if (len <= 0)
+	    break;
+
+	  filename = (char *)ent + nameoffset * 4;
+
+	  objfile = symbol_file_add (filename, from_tty,
+				     0, /* addr */
+				     0, /* not mainline */
+				     0, /* not mapped */
+				     0); /* Not readnow */
+	  libsize -= len * 4;
+	  lib += len * 4;
+	}
+
+      /* Getting new symbols may change our opinion about what is
+	 frameless.  */
+      reinit_frame_cache ();
+    }
+}
+
+/*
+  
+GLOBAL FUNCTION
+  
+	coff_solib_create_inferior_hook -- shared library startup support
+  
+SYNOPSIS
+  
+	void coff_solib_create_inferior_hook()
+  
+DESCRIPTION
+  
+	When gdb starts up the inferior, the kernel maps in the shared
+	libraries.  We get here with the target stopped at it's first
+	instruction, and the libraries already mapped.  At this	point, this
+	function gets called via expansion of the macro
+	SOLIB_CREATE_INFERIOR_HOOK.
+  */
+
+void 
+coff_solib_create_inferior_hook()
+{
+  coff_solib_add ((char *) 0, 0, (struct target_ops *) 0);
+}