ddb: add support for ELF symbol tables

* ddb/db_elf.c: New file.
* ddb/db_elf.h: Likewise.
* Makefrag.am (libkernel_a_SOURCES): Add db_elf.{c,h}.
* ddb/db_sym.c (dummy_db_sym_init): New stub db_sym_init function.
(db_sym_switch): Add ELF functions.
* ddb/db_sym.h (SYMTAB_ELF): New macro.
(elf_db_sym_init): New declaration.
* i386/i386at/model_dep.c (c_boot_entry): Get ELF section header
information from the multiboot structure, and call elf_db_sym_init.

1 files changed, 52 insertions, 0 deletions

diff --git a/ddb/db_elf.h b/ddb/db_elf.h
new file mode 100644
index 0000000..12b8286
--- /dev/null
+++ b/ddb/db_elf.h
@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2013 Free Software Foundation.
+ *
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef _DDB_DB_ELF_H_
+#define _DDB_DB_ELF_H_
+
+#include <ddb/db_sym.h>
+#include <machine/db_machdep.h>
+
+extern boolean_t
+elf_db_line_at_pc(
+	db_symtab_t	*stab,
+	db_sym_t	sym,
+	char		**file,
+	int		*line,
+	db_addr_t	pc);
+
+extern db_sym_t
+elf_db_lookup(
+	db_symtab_t	*stab,
+	char *		symstr);
+
+extern db_sym_t
+elf_db_search_symbol(
+	db_symtab_t *	symtab,
+	db_addr_t	off,
+	db_strategy_t	strategy,
+	db_expr_t	*diffp);
+
+extern void
+elf_db_symbol_values(
+	db_symtab_t	*stab,
+	db_sym_t	sym,
+	char		**namep,
+	db_expr_t	*valuep);
+
+#endif /* _DDB_DB_ELF_H_ */