Add DDB symbol support for ELF and KLD. The KLD support only supports global

symbols so its not too useful.  Changes to the kernel linker to allow it to
supply DDB with symbols will come later.

1 files changed, 137 insertions, 0 deletions

diff --git a/sys/ddb/db_kld.c b/sys/ddb/db_kld.c
new file mode 100644
index 0000000..48ba135
--- /dev/null
+++ b/sys/ddb/db_kld.c
@@ -0,0 +1,137 @@
+/*
+ * Mach Operating System
+ * Copyright (c) 1991,1990 Carnegie Mellon University
+ * All Rights Reserved.
+ *
+ * Permission to use, copy, modify and distribute this software and its
+ * documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ *
+ * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS
+ * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
+ * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ *
+ * Carnegie Mellon requests users of this software to return to
+ *
+ *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
+ *  School of Computer Science
+ *  Carnegie Mellon University
+ *  Pittsburgh PA 15213-3890
+ *
+ * any improvements or extensions that they make and grant Carnegie the
+ * rights to redistribute these changes.
+ *
+ *	$Id$
+ *	from db_aout.c,v 1.20 1998/06/07 17:09:36 dfr Exp
+ */
+
+/*
+ *	Author: David B. Golub, Carnegie Mellon University
+ *	Date:	7/90
+ */
+/*
+ * Symbol table routines for a.out format files.
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/linker.h>
+
+#include <machine/bootinfo.h>
+
+#include <ddb/ddb.h>
+#include <ddb/db_sym.h>
+
+extern linker_file_t linker_kernel_file;
+
+#define KF linker_kernel_file
+
+db_sym_t
+X_db_lookup(stab, symstr)
+	db_symtab_t	*stab;
+	char *		symstr;
+{
+	linker_sym_t sym;
+
+	if (!KF)
+		return 0;
+
+	if (KF->ops->lookup_symbol(KF, symstr, &sym) == 0)
+	    return (db_sym_t) sym;
+	else
+	    return (db_sym_t) 0;
+}
+
+db_sym_t
+X_db_search_symbol(symtab, off, strategy, diffp)
+	db_symtab_t *	symtab;
+	register
+	db_addr_t	off;
+	db_strategy_t	strategy;
+	db_expr_t	*diffp;		/* in/out */
+{
+	linker_sym_t sym;
+	long diff;
+
+	if (!KF)
+		return 0;
+
+	if (KF->ops->search_symbol(KF, (caddr_t) off, &sym, &diff) == 0) {
+		*diffp = (db_expr_t) diff;
+		return (db_sym_t) sym;
+	}
+
+	return 0;
+}
+
+/*
+ * Return the name and value for a symbol.
+ */
+void
+X_db_symbol_values(dbsym, namep, valuep)
+	db_sym_t	dbsym;
+	char		**namep;
+	db_expr_t	*valuep;
+{
+	linker_sym_t sym = (linker_sym_t) dbsym;
+	linker_symval_t symval;
+
+	KF->ops->symbol_values(KF, sym, &symval);
+	if (namep)
+	    *namep = (char*) symval.name;
+	if (valuep)
+	    *valuep = (db_expr_t) symval.value;
+}
+
+
+boolean_t
+X_db_line_at_pc(symtab, cursym, filename, linenum, off)
+	db_symtab_t *	symtab;
+	db_sym_t	cursym;
+	char 		**filename;
+	int 		*linenum;
+	db_expr_t	off;
+{
+	return FALSE;
+}
+
+boolean_t
+X_db_sym_numargs(symtab, cursym, nargp, argnamep)
+	db_symtab_t *	symtab;
+	db_sym_t	cursym;
+	int		*nargp;
+	char		**argnamep;
+{
+	return FALSE;
+}
+
+/*
+ * Initialization routine for a.out files.
+ */
+void
+kdb_init()
+{
+	db_add_symbol_table(0, 0, "kernel", 0);
+}