updated the build script to patch for new freebsd kernels

README.md

@@ -36,8 +36,10 @@ interface) is never disrupted.
   (`patches/patch-*.c` and `patches/patch-Makefile`). Safe to re-run.
 - `build.sh` — builds `if_bwn.ko` (`sys/modules/bwn`), `bhndb_pci.ko`
   (`sys/modules/bhnd/bhndb_pci`), and `bwn_v4_n.ko` (from `src/firmware/`);
-  installs them to `/boot/modules` and `/boot/kernel`; and appends
-  `bwn_v4_n_load="YES"` to `/boot/loader.conf` if missing (Fix 5).
+  installs them to `/boot/modules` and `/boot/kernel`; appends
+  `bwn_v4_n_load="YES"` to `/boot/loader.conf` if missing (Fix 5); and
+  regenerates `/boot/kernel/linker.hints` and `/boot/modules/linker.hints`
+  with `kldxref` so the loader finds the new modules (no manual step).
 
 ### Manual build (equivalent to build.sh)
 
@@ -58,6 +60,12 @@ install -m 444 src/firmware/bwn_v4_n.ko /boot/modules/
 
 # 4. loader.conf (Fix 5)
 echo 'bwn_v4_n_load="YES"' >> /boot/loader.conf
+
+# 5. Regenerate linker.hints so the loader indexes the new modules
+#    (else /boot/kernel/linker.hints stays empty -> 'linker.hints file
+#    truncated' warnings and modules fail to auto-load at boot).
+kldxref /boot/kernel
+kldxref /boot/modules
 ```
 
 ## Directory layout

build.sh

@@ -11,6 +11,9 @@
 #   2. Builds bhndb_pci.ko(sys/modules/bhnd/bhndb_pci) -> /boot/kernel/bhndb_pci.ko
 #   3. Builds bwn_v4_n.ko (src/firmware)          -> /boot/modules/bwn_v4_n.ko
 #   4. Adds "bwn_v4_n_load=YES" to /boot/loader.conf (Fix 5) if missing.
+#   5. Regenerates /boot/kernel/linker.hints (for bhndb_pci.ko) and
+#      /boot/modules/linker.hints (for if_bwn.ko + bwn_v4_n.ko) with kldxref
+#      so the loader finds the new modules without manual intervention.
 #
 # All changes take effect on the NEXT reboot (modules are only loaded at
 # boot). The running kernel is NOT touched, so an active SSH session (e.g.
@@ -20,6 +23,13 @@
 # NO_MSI quirk), so TX interrupts are delivered and the "device timeout" /
 # detach-panic / heap-corruption issues are resolved.
 set -e
+
+# Re-exec as root if we are not already (build + install + kldxref need it).
+if [ "$(id -u)" -ne 0 ]; then
+  echo "build.sh needs root (install + kldxref); re-execing via sudo..."
+  exec sudo "$0" "$@"
+fi
+
 SRC="${1:-/usr/src}"
 HERE="$(cd "$(dirname "$0")" && pwd)"
 
@@ -58,7 +68,19 @@ else
   echo "    already present, skipped"
 fi
 
+echo "==> Regenerating linker.hints (no manual kldxref needed)"
+# The kernel hints file indexes /boot/kernel (where bhndb_pci.ko lives); the
+# modules hints file indexes /boot/modules (if_bwn.ko + bwn_v4_n.ko). If either
+# is stale/empty the loader prints "linker.hints file truncated" and may fail
+# to auto-load modules, so rebuild both from the modules currently present.
+kldxref /boot/kernel
+kldxref /boot/modules
+echo "    /boot/kernel/linker.hints:    $(wc -c < /boot/kernel/linker.hints) bytes"
+echo "    /boot/modules/linker.hints:   $(wc -c < /boot/modules/linker.hints) bytes"
+
 echo
-echo "==> All modules built and installed. REBOOT to activate."
+echo "==> All modules built, installed and indexed. REBOOT to activate."
 echo "    After reboot, create the interface with:"
 echo "        ifconfig wlan create wlandev bwn0 [wap]"
+
+exit 0