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Module object files can contain an undefined reference to __this_module, which isn't resolved until we link the final .ko. The kernel doesn't export this symbol, so ignore it in gen_autoksyms.sh. Signed-off-by: Sami Tolvanen <samitolvanen@google.com> Tested-by: Steve Muckle <smuckle@google.com> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> Tested-by: Ramji Jiyani <ramjiyani@google.com>
62 lines
1.5 KiB
Bash
Executable file
62 lines
1.5 KiB
Bash
Executable file
#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0-only
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# Create an autoksyms.h header file from the list of all module's needed symbols
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# as recorded in *.usyms files and the user-provided symbol whitelist.
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set -e
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# Use "make V=1" to debug this script.
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case "$KBUILD_VERBOSE" in
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*1*)
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set -x
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;;
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esac
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read_modorder=
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if [ "$1" = --modorder ]; then
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shift
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read_modorder=1
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fi
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output_file="$1"
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needed_symbols=
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# Special case for modversions (see modpost.c)
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if grep -q "^CONFIG_MODVERSIONS=y$" include/config/auto.conf; then
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needed_symbols="$needed_symbols module_layout"
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fi
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ksym_wl=$(sed -n 's/^CONFIG_UNUSED_KSYMS_WHITELIST=\(.*\)$/\1/p' include/config/auto.conf)
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if [ -n "$ksym_wl" ]; then
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[ "${ksym_wl}" != "${ksym_wl#/}" ] || ksym_wl="$abs_srctree/$ksym_wl"
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if [ ! -f "$ksym_wl" ] || [ ! -r "$ksym_wl" ]; then
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echo "ERROR: '$ksym_wl' whitelist file not found" >&2
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exit 1
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fi
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fi
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# Generate a new ksym list file with symbols needed by the current
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# set of modules.
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cat > "$output_file" << EOT
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/*
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* Automatically generated file; DO NOT EDIT.
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*/
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EOT
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{
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[ -n "${read_modorder}" ] && sed 's/ko$/usyms/' modules.order | xargs cat
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echo "$needed_symbols"
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[ -n "$ksym_wl" ] && cat "$ksym_wl"
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} | sed -e 's/ /\n/g' | sed -n -e '/^$/!p' |
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# Remove the dot prefix for ppc64; symbol names with a dot (.) hold entry
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# point addresses.
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sed -e 's/^\.//' |
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sort -u |
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# Ignore __this_module. It's not an exported symbol, and will be resolved
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# when the final .ko's are linked.
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grep -v '^__this_module$' |
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sed -e 's/\(.*\)/#define __KSYM_\1 1/' >> "$output_file"
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