From 7085e708787865e0c0c0c0067a58538cd34b52e7 Mon Sep 17 00:00:00 2001
From: Bruce Evans <bde@FreeBSD.org>
Date: Tue, 7 May 2002 10:59:52 +0000
Subject: [PATCH] Reconnect db_elf.c to the build (now under "options
 DDB_NOKLDSYM").  It doesn't actually build yet.

---
 sys/conf/NOTES   | 8 ++++++++
 sys/conf/files   | 1 +
 sys/conf/options | 1 +
 sys/ddb/db_elf.c | 8 ++++++--
 sys/ddb/db_kld.c | 6 ++++++
 5 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/sys/conf/NOTES b/sys/conf/NOTES
index c5f1f7f21d8e..06f4ed34a7ec 100644
--- a/sys/conf/NOTES
+++ b/sys/conf/NOTES
@@ -185,6 +185,14 @@ options 	SYSVMSG
 #
 options 	DDB
 
+#
+# Use direct symbol lookup routines for ddb instead of the kernel linker
+# ones, so that symbols (mostly) work before the kernel linker has been
+# initialized.  This is not the default because it breaks ddb's lookup of
+# symbols in loaded modules.
+#
+#!options 	DDB_NOKLDSYM
+
 #
 # Don't drop into DDB for a panic. Intended for unattended operation
 # where you may want to drop to DDB from the console, but still want
diff --git a/sys/conf/files b/sys/conf/files
index 605d6542348f..e7f520a6430c 100644
--- a/sys/conf/files
+++ b/sys/conf/files
@@ -177,6 +177,7 @@ crypto/sha2/sha2.c	optional ipsec
 ddb/db_access.c		optional ddb
 ddb/db_break.c		optional ddb
 ddb/db_command.c	optional ddb
+ddb/db_elf.c		optional ddb
 ddb/db_examine.c	optional ddb
 ddb/db_expr.c		optional ddb
 ddb/db_input.c		optional ddb
diff --git a/sys/conf/options b/sys/conf/options
index 55eeecc94bb0..dc617f34d824 100644
--- a/sys/conf/options
+++ b/sys/conf/options
@@ -62,6 +62,7 @@ COMPAT_SUNOS	opt_compat.h
 COMPILING_LINT	opt_global.h
 CY_PCI_FASTINTR
 DDB
+DDB_NOKLDSYM	opt_ddb.h
 DDB_UNATTENDED	opt_ddb.h
 GDB_REMOTE_CHAT	opt_ddb.h
 NODEVFS		opt_devfs.h
diff --git a/sys/ddb/db_elf.c b/sys/ddb/db_elf.c
index b4fd53dd118d..97e97cabf167 100644
--- a/sys/ddb/db_elf.c
+++ b/sys/ddb/db_elf.c
@@ -38,10 +38,12 @@
  * POSSIBILITY OF SUCH DAMAGE.
  */
 
-#if defined(__ELF__) && defined(__alpha__)
+#ifdef __ELF__
 
 #include "opt_ddb.h"
 
+#ifdef DDB_NOKLDSYM
+
 #include <sys/types.h>
 #include <sys/param.h>
 #include <sys/systm.h>  
@@ -378,4 +380,6 @@ kdb_init(void)
 		X_db_sym_init(ksym_start, ksym_end, "kernel");
 }
 
-#endif
+#endif /* DDB_NOKLDSYM */
+
+#endif /* __ELF__ */
diff --git a/sys/ddb/db_kld.c b/sys/ddb/db_kld.c
index 9599299a3ebe..903a589671af 100644
--- a/sys/ddb/db_kld.c
+++ b/sys/ddb/db_kld.c
@@ -35,6 +35,10 @@
  * Symbol table routines for kld maintained kernels.
  */
 
+#include "opt_ddb.h"
+
+#ifndef DDB_NOKLDSYM
+
 #include <sys/param.h>
 #include <sys/systm.h>
 #include <sys/linker.h>
@@ -124,3 +128,5 @@ kdb_init()
 {
 	db_add_symbol_table(0, 0, "kernel", 0);
 }
+
+#endif /* !DDB_NOKLDSYM */