kbuild: add debug package to pacman PKGBUILD

Add a new debug package to the PKGBUILD for the pacman-pkg target. The
debug package includes the non-stripped vmlinux file with debug symbols
for kernel debugging and profiling. The file is installed at
/usr/src/debug/${pkgbase}, with a symbolic link at
/usr/lib/modules/$(uname -r)/build/vmlinux. The debug package is built
by default.

Signed-off-by: Jose Fernandez <jose.fernandez@linux.dev>
Reviewed-by: Peter Jung <ptr1337@cachyos.org>
Acked-by: Thomas Weißschuh <linux@weissschuh.net>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

diff --git a/scripts/package/PKGBUILD b/scripts/package/PKGBUILD
index 839cd5e634d20b311a63a5cb80a88d627fa0bc00..f83493838cf96ac9f209c6fc8f9b219705f9715b 100644 (file)
--- a/scripts/package/PKGBUILD
+++ b/scripts/package/PKGBUILD
@@ -5,7 +5,7 @@
 pkgbase=${PACMAN_PKGBASE:-linux-upstream}
 pkgname=("${pkgbase}")
 
-_extrapackages=${PACMAN_EXTRAPACKAGES-headers api-headers}
+_extrapackages=${PACMAN_EXTRAPACKAGES-headers api-headers debug}
 for pkg in $_extrapackages; do
        pkgname+=("${pkgbase}-${pkg}")
 done
@@ -111,6 +111,19 @@ _package-api-headers() {
        ${MAKE} headers_install INSTALL_HDR_PATH="${pkgdir}/usr"
 }
 
+_package-debug(){
+       pkgdesc="Non-stripped vmlinux file for the ${pkgdesc} kernel"
+
+       local debugdir="${pkgdir}/usr/src/debug/${pkgbase}"
+       local builddir="${pkgdir}/usr/${MODLIB}/build"
+
+       _prologue
+
+       install -Dt "${debugdir}" -m644 vmlinux
+       mkdir -p "${builddir}"
+       ln -sr "${debugdir}/vmlinux" "${builddir}/vmlinux"
+}
+
 for _p in "${pkgname[@]}"; do
        eval "package_$_p() {
                $(declare -f "_package${_p#$pkgbase}")