From 9f7269677c5e70283a16887e1e4b4a1ed95a96fb Mon Sep 17 00:00:00 2001
From: Warner Losh <imp@FreeBSD.org>
Date: Sun, 4 Dec 2022 13:52:22 -0700
Subject: [PATCH] kboot: Add md_addr to metadata

Save the address of where the metadata is loaded.

Sponsored by:		Netflix
---
 stand/common/bootstrap.h | 1 +
 stand/common/modinfo.c   | 4 +++-
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/stand/common/bootstrap.h b/stand/common/bootstrap.h
index cb1c96dc3b69..bbe97e80323b 100644
--- a/stand/common/bootstrap.h
+++ b/stand/common/bootstrap.h
@@ -201,6 +201,7 @@ struct file_metadata
 {
 	size_t		md_size;
 	uint16_t	md_type;
+	vm_offset_t	md_addr;	/* Valid after copied to kernel space */
 	struct file_metadata *md_next;
 	char		md_data[1];	/* data are immediately appended */
 };
diff --git a/stand/common/modinfo.c b/stand/common/modinfo.c
index 0c00b2070274..381bd9dfd719 100644
--- a/stand/common/modinfo.c
+++ b/stand/common/modinfo.c
@@ -95,8 +95,10 @@
 #define MOD_METADATA(a, mm, c) {		\
     COPY32(MODINFO_METADATA | mm->md_type, a, c);\
     COPY32(mm->md_size, a, c);			\
-    if (c)					\
+    if (c) {					\
         archsw.arch_copyin(mm->md_data, a, mm->md_size);\
+	mm->md_addr = a;			\
+    }						\
     a += MOD_ALIGN(mm->md_size);		\
 }