In order to prepare the ground for a build-time optimization, split adjust_autoksyms.sh into two scripts: one that generates autoksyms.h based on all currently available information (whitelist, and .mod files), and the other to inspect the diff between two versions of autoksyms.h and trigger appropriate rebuilds.
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| @@ -1,14 +1,13 @@ | |||
| 1 | #!/bin/sh | 1 | #!/bin/sh |
| 2 | # SPDX-License-Identifier: GPL-2.0-only | 2 | # SPDX-License-Identifier: GPL-2.0-only |
| 3 | 3 | ||
| 4 | # Script to create/update include/generated/autoksyms.h and dependency files | 4 | # Script to update include/generated/autoksyms.h and dependency files |
| 5 | # | 5 | # |
| 6 | # Copyright: (C) 2016 Linaro Limited | 6 | # Copyright: (C) 2016 Linaro Limited |
| 7 | # Created by: Nicolas Pitre, January 2016 | 7 | # Created by: Nicolas Pitre, January 2016 |
| 8 | # | 8 | # |
| 9 | 9 | ||
| 10 | # Create/update the include/generated/autoksyms.h file from the list | 10 | # Update the include/generated/autoksyms.h file. |
| 11 | # of all module's needed symbols as recorded on the second line of *.mod files. | ||
| 12 | # | 11 | # |
| 13 | # For each symbol being added or removed, the corresponding dependency | 12 | # For each symbol being added or removed, the corresponding dependency |
| 14 | # file's timestamp is updated to force a rebuild of the affected source | 13 | # file's timestamp is updated to force a rebuild of the affected source |
| @@ -38,35 +37,8 @@ esac · 23 unmodified lines | |||
| 38 | # We need access to CONFIG_ symbols | 37 | # We need access to CONFIG_ symbols |
| 39 | . include/config/auto.conf | 38 | . include/config/auto.conf |
| 40 | 39 | ||
| 41 | ksym_wl=/dev/null | 40 | # Generate a new symbol list file |
| 42 | if [ -n "$CONFIG_UNUSED_KSYMS_WHITELIST" ]; then | 41 | $CONFIG_SHELL $srctree/scripts/gen_autoksyms.sh "$new_ksyms_file" |
| 43 | # Use 'eval' to expand the whitelist path and check if it is relative | ||
| 44 | eval ksym_wl="$CONFIG_UNUSED_KSYMS_WHITELIST" | ||
| 45 | [ "${ksym_wl}" != "${ksym_wl#/}" ] || ksym_wl="$abs_srctree/$ksym_wl" | ||
| 46 | if [ ! -f "$ksym_wl" ] || [ ! -r "$ksym_wl" ]; then | ||
| 47 | echo "ERROR: '$ksym_wl' whitelist file not found" >&2 | ||
| 48 | exit 1 | ||
| 49 | fi | ||
| 50 | fi | ||
| 51 | |||
| 52 | # Generate a new ksym list file with symbols needed by the current | ||
| 53 | # set of modules. | ||
| 54 | cat > "$new_ksyms_file" << EOT | ||
| 55 | /* | ||
| 56 | * Automatically generated file; DO NOT EDIT. | ||
| 57 | */ | ||
| 58 | |||
| 59 | EOT | ||
| 60 | sed 's/ko$/mod/' modules.order | | ||
| 61 | xargs -n1 sed -n -e '2{s/ /\n/g;/^$/!p;}' -- | | ||
| 62 | cat - "$ksym_wl" | | ||
| 63 | sort -u | | ||
| 64 | sed -e 's/\(.*\)/#define __KSYM_\1 1/' >> "$new_ksyms_file" | ||
| 65 | |||
| 66 | # Special case for modversions (see modpost.c) | ||
| 67 | if [ -n "$CONFIG_MODVERSIONS" ]; then | ||
| 68 | echo "#define __KSYM_module_layout 1" >> "$new_ksyms_file" | ||
| 69 | fi | ||
| 70 | 42 | ||
| 71 | # Extract changes between old and new list and touch corresponding | 43 | # Extract changes between old and new list and touch corresponding |
| 72 | # dependency files. | 44 | # dependency files. |
| @@ -0,0 +1,51 @@ | |||
| 1 | #!/bin/sh | ||
| 2 | # SPDX-License-Identifier: GPL-2.0-only | ||
| 3 | |||
| 4 | # Create an autoksyms.h header file from the list of all module's needed symbols | ||
| 5 | # as recorded on the second line of *.mod files and the user-provided symbol | ||
| 6 | # whitelist. | ||
| 7 | |||
| 8 | set -e | ||
| 9 | |||
| 10 | output_file="$1" | ||
| 11 | |||
| 12 | # Use "make V=1" to debug this script. | ||
| 13 | case "$KBUILD_VERBOSE" in | ||
| 14 | *1*) | ||
| 15 | set -x | ||
| 16 | ;; | ||
| 17 | esac | ||
| 18 | |||
| 19 | # We need access to CONFIG_ symbols | ||
| 20 | . include/config/auto.conf | ||
| 21 | |||
| 22 | ksym_wl=/dev/null | ||
| 23 | if [ -n "$CONFIG_UNUSED_KSYMS_WHITELIST" ]; then | ||
| 24 | # Use 'eval' to expand the whitelist path and check if it is relative | ||
| 25 | eval ksym_wl="$CONFIG_UNUSED_KSYMS_WHITELIST" | ||
| 26 | [ "${ksym_wl}" != "${ksym_wl#/}" ] || ksym_wl="$abs_srctree/$ksym_wl" | ||
| 27 | if [ ! -f "$ksym_wl" ] || [ ! -r "$ksym_wl" ]; then | ||
| 28 | echo "ERROR: '$ksym_wl' whitelist file not found" >&2 | ||
| 29 | exit 1 | ||
| 30 | fi | ||
| 31 | fi | ||
| 32 | |||
| 33 | # Generate a new ksym list file with symbols needed by the current | ||
| 34 | # set of modules. | ||
| 35 | cat > "$output_file" << EOT | ||
| 36 | /* | ||
| 37 | * Automatically generated file; DO NOT EDIT. | ||
| 38 | */ | ||
| 39 | |||
| 40 | EOT | ||
| 41 | |||
| 42 | sed 's/ko$/mod/' modules.order | | ||
| 43 | xargs -n1 sed -n -e '2{s/ /\n/g;/^$/!p;}' -- | | ||
| 44 | cat - "$ksym_wl" | | ||
| 45 | sort -u | | ||
| 46 | sed -e 's/\(.*\)/#define __KSYM_\1 1/' >> "$output_file" | ||
| 47 | |||
| 48 | # Special case for modversions (see modpost.c) | ||
| 49 | if [ -n "$CONFIG_MODVERSIONS" ]; then | ||
| 50 | echo "#define __KSYM_module_layout 1" >> "$output_file" | ||
| 51 | fi | ||