bf0dc51ca3
Script doesn't honor the Kernel's quiet command mechanism with KBuild; so need to remove info only echo. Added set -x in case make V=1 for keeping debugging handy for script in the future. Bug: 234116152 Test: TH Signed-off-by: Ramji Jiyani <ramjiyani@google.com> Change-Id: Iea881816b9bc8c47157a33da67d6cf5f8357a7be (cherry picked from commit 08a1879c876258e1ad269ab3dc111ffc6750440a)
102 lines
2.6 KiB
Bash
Executable File
102 lines
2.6 KiB
Bash
Executable File
#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0-only
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#
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# Copyright 2021 Google LLC
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# Author: ramjiyani@google.com (Ramji Jiyani)
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#
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#
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# Generates hearder files for GKI modules symbol and export protections
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#
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# Called By: KERNEL_SRC/kernel/Makefile if CONFIG_MODULE_SIG_PROTECT=y
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#
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# gki_module_exported.h: Symbols protected from _export_ by unsigned modules
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# gki_module_protected.h: Symbols protected from _access_ by unsigned modules
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#
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# If valid symbol file doesn't exists then still generates valid C header files for
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# compilation to proceed with no symbols to protect
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#
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# Collect arguments from Makefile
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TARGET=$1
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SRCTREE=$2
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set -e
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#
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# Common Definitions
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#
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# Use "make V=1" to debug this script.
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case "$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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#
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# generate_header():
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# Args: $1 = Name of the header file
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# $2 = Input symbol list
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# $3 = Symbol type (protected/exported)
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#
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generate_header() {
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local header_file=$1
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local symbol_file=$2
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local symbol_type=$3
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if [ -f "${header_file}" ]; then
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rm -f -- "${header_file}"
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fi
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# Find Maximum symbol name length if valid symbol_file exist
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if [ -s "${symbol_file}" ]; then
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# Skip 1st line (symbol header), Trim white spaces & +1 for null termination
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local max_name_len=$(awk '
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{
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$1=$1;
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if ( length > L && NR > 1) {
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L=length
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}
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} END { print ++L }' "${symbol_file}")
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else
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# Set to 1 to generate valid C header file
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local max_name_len=1
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fi
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# Header generation
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cat > "${header_file}" <<- EOT
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/*
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* DO NOT EDIT
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*
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* Build generated header file with GKI module symbols/exports
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*/
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#define NO_OF_$(printf ${symbol_type} | tr [:lower:] [:upper:])_SYMBOLS \\
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$(printf '\t')(sizeof(gki_${symbol_type}_symbols) / sizeof(gki_${symbol_type}_symbols[0]))
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#define MAX_$(printf ${symbol_type} | tr [:lower:] [:upper:])_NAME_LEN (${max_name_len})
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static const char gki_${symbol_type}_symbols[][MAX_$(printf ${symbol_type} |
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tr [:lower:] [:upper:])_NAME_LEN] = {
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EOT
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# If a valid symbol_file present add symbols in an array except the 1st line
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if [ -s "${symbol_file}" ]; then
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sed -e 1d -e 's/^[ \t]*/\t"/;s/[ \t]*$/",/' "${symbol_file}" >> "${header_file}"
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fi
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# Terminate the file
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echo "};" >> "${header_file}"
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}
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if [ "$(basename "${TARGET}")" = "gki_module_protected.h" ]; then
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# Sorted list of protected symbols
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GKI_PROTECTED_SYMBOLS="${SRCTREE}/android/abi_gki_modules_protected"
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generate_header "${TARGET}" "${GKI_PROTECTED_SYMBOLS}" "protected"
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else
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# Sorted list of exported symbols
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GKI_EXPORTED_SYMBOLS="${SRCTREE}/android/abi_gki_modules_exports"
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generate_header "${TARGET}" "${GKI_EXPORTED_SYMBOLS}" "exported"
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fi
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