2002-01-03 Michael Snyder <msnyder@redhat.com>

	Implement a "generate-core-file" command in gdb, save target state.
	* gcore.c: New file.  Implement new command 'generate-core-file'.
	Save a corefile image of the current state of the inferior.
	* linux-proc.c: Add linux-specific code for saving corefiles.
	* target.h (struct target_ops): Add new target vectors for saving
	corefiles; to_find_memory_regions and to_make_corefile_notes.
	(target_find_memory_regions): New macro.
	(target_make_corefile_notes): New macro.
	* target.c (update_current_target): Inherit new target methods.
	(dummy_find_memory_regions): New place-holder method.
	(dummy_make_corefile_notes): New place-holder method.
	(init_dummy_target): Initialize new dummy target vectors.
	* exec.c (exec_set_find_memory_regions): New function.
	Allow the exec_ops vector for memory regions to be taken over.
	(exec_make_note_section): New function, target vector method.
	* defs.h (exec_set_find_memory_regions): Export prototype.
	* procfs.c (proc_find_memory_regions): New function, corefile method.
	(procfs_make_note_section): New function, corefile method.
	(init_procfs_ops): Set new target vector pointers.
	(find_memory_regions_callback): New function.
	(procfs_do_thread_registers): New function.
	(procfs_corefile_thread_callback): New function.
	* sol-thread.c (sol_find_memory_regions): New function.
	(sol_make_note_section): New function.
	(init_sol_thread_ops): Initialize new target vectors.
	* inftarg.c (inftarg_set_find_memory_regions): New function.
	Allow to_find_memory_regions vector to be taken over.
	(inftarg_set_make_corefile_notes): New function.
	Allow to_make_corefile_notes vector to be taken over.
	* thread-db.c (thread_db_new_objfile): Don't activate thread-db
	interface layer if not target_has_execution (may be a corefile).
	* config/i386/linux.mh: Add gcore.o to NATDEPFILES.
	* config/sparc/sun4sol2.mh: Ditto.
	* config/alpha/alpha-linux.mh: Ditto.
	* config/arm/linux.mh: Ditto.
	* config/i386/x86-64linux.mh: Ditto.
	* config/ia64/linux.mh: Ditto.
	* config/m68k/linux.mh: Ditto.
	* config/mips/linux.mh: Ditto.
	* config/powerpc/linux.mh: Ditto.
	* config/sparc/linux.mh: Ditto.

1 files changed, 48 insertions, 2 deletions

diff --git a/gdb/exec.c b/gdb/exec.c
index 6e4e85b..404617e 100644
--- a/gdb/exec.c
+++ b/gdb/exec.c
@@ -1,6 +1,6 @@
 /* Work with executable files, for GDB. 
    Copyright 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
-   1998, 1999, 2000, 2001
+   1998, 1999, 2000, 2001, 2002
    Free Software Foundation, Inc.
 
    This file is part of GDB.
@@ -685,10 +685,24 @@ ignore (CORE_ADDR addr, char *contents)
   return 0;
 }
 
+/* Find mapped memory. */
+
+extern void
+exec_set_find_memory_regions (int (*func) (int (*) (CORE_ADDR, 
+						    unsigned long, 
+						    int, int, int, 
+						    void *),
+					   void *))
+{
+  exec_ops.to_find_memory_regions = func;
+}
+
+static char *exec_make_note_section (bfd *, int *);
+
 /* Fill in the exec file target vector.  Very few entries need to be
    defined.  */
 
-void
+static void
 init_exec_ops (void)
 {
   exec_ops.to_shortname = "exec";
@@ -708,6 +722,7 @@ Specify the filename of the executable file.";
   exec_ops.to_clone_and_follow_inferior = find_default_clone_and_follow_inferior;
   exec_ops.to_stratum = file_stratum;
   exec_ops.to_has_memory = 1;
+  exec_ops.to_make_corefile_notes = exec_make_note_section;
   exec_ops.to_magic = OPS_MAGIC;
 }
 
@@ -752,3 +767,34 @@ file itself are wrong.  Each section must be changed separately.  The\n\
 
   add_target (&exec_ops);
 }
+
+static char *
+exec_make_note_section (bfd *obfd, int *note_size)
+{
+  struct cleanup *old_chain;
+  char fname[16] = {'\0'};
+  char psargs[80] = {'\0'};
+  char *note_data = NULL;
+
+  if (get_exec_file (0))
+    {
+      strncpy (fname, strrchr (get_exec_file (0), '/') + 1, sizeof (fname));
+      strncpy (psargs, get_exec_file (0), 
+	       sizeof (psargs));
+      if (get_inferior_args ())
+	{
+	  strncat (psargs, " ", 
+		   sizeof (psargs) - strlen (psargs));
+	  strncat (psargs, get_inferior_args (), 
+		   sizeof (psargs) - strlen (psargs));
+	}
+
+      note_data = (char *) elfcore_write_prpsinfo (obfd, 
+						   note_data, 
+						   note_size, 
+						   fname, 
+						   psargs);
+      make_cleanup (xfree, note_data);
+    }
+  return note_data;
+}