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-rwxr-xr-xscripts/link-vmlinux.sh25
1 files changed, 24 insertions, 1 deletions
diff --git a/scripts/link-vmlinux.sh b/scripts/link-vmlinux.sh
index dc0e8c5a1402..e3c06b9482a2 100755
--- a/scripts/link-vmlinux.sh
+++ b/scripts/link-vmlinux.sh
@@ -35,7 +35,7 @@ set -e
info()
{
if [ "${quiet}" != "silent_" ]; then
- printf " %-7s %s\n" ${1} ${2}
+ printf " %-7s %s\n" "${1}" "${2}"
fi
}
@@ -91,6 +91,25 @@ vmlinux_link()
fi
}
+# generate .BTF typeinfo from DWARF debuginfo
+gen_btf()
+{
+ local pahole_ver;
+
+ if ! [ -x "$(command -v ${PAHOLE})" ]; then
+ info "BTF" "${1}: pahole (${PAHOLE}) is not available"
+ return 0
+ fi
+
+ pahole_ver=$(${PAHOLE} --version | sed -E 's/v([0-9]+)\.([0-9]+)/\1\2/')
+ if [ "${pahole_ver}" -lt "113" ]; then
+ info "BTF" "${1}: pahole version $(${PAHOLE} --version) is too old, need at least v1.13"
+ return 0
+ fi
+
+ info "BTF" ${1}
+ LLVM_OBJCOPY=${OBJCOPY} ${PAHOLE} -J ${1}
+}
# Create ${2} .o file with all symbols from the ${1} object file
kallsyms()
@@ -248,6 +267,10 @@ fi
info LD vmlinux
vmlinux_link "${kallsymso}" vmlinux
+if [ -n "${CONFIG_DEBUG_INFO_BTF}" ]; then
+ gen_btf vmlinux
+fi
+
if [ -n "${CONFIG_BUILDTIME_EXTABLE_SORT}" ]; then
info SORTEX vmlinux
sortextable vmlinux