name : headers_install.sh #!/bin/sh # SPDX-License-Identifier: GPL-2.0 if [ $# -ne 2 ] then echo "Usage: headers_install.sh INFILE OUTFILE" echo echo "Prepares kernel header files for use by user space, by removing" echo "all compiler.h definitions and #includes, removing any" echo "#ifdef __KERNEL__ sections, and putting __underscores__ around" echo "asm/inline/volatile keywords." echo echo "INFILE: header file to operate on" echo "OUTFILE: output file which the processed header is written to" exit 1 fi # Grab arguments INFILE=$1 OUTFILE=$2 TMPFILE=$OUTFILE.tmp trap 'rm -f $OUTFILE $TMPFILE' EXIT # SPDX-License-Identifier with GPL variants must have "WITH Linux-syscall-note" if [ -n "$(sed -n -e "/SPDX-License-Identifier:.*GPL-/{/WITH Linux-syscall-note/!p}" $INFILE)" ]; then echo "error: $INFILE: missing \"WITH Linux-syscall-note\" for SPDX-License-Identifier" >&2 exit 1 fi sed -E -e ' s/([[:space:](])(__user|__force|__iomem)[[:space:]]/\1/g s/__attribute_const__([[:space:]]|$)/\1/g s@^#include <linux/compiler(|_types).h>@@ s/(^|[^a-zA-Z0-9])__packed([^a-zA-Z0-9_]|$)/\1__attribute__((packed))\2/g s/(^|[[:space:](])(inline|asm|volatile)([[:space:](]|$)/\1__\2__\3/g s@#(ifndef|define|endif[[:space:]]*/[*])[[:space:]]*_UAPI@#\1 @ ' $INFILE > $TMPFILE || exit 1 scripts/unifdef -U__KERNEL__ -D__EXPORTED_HEADERS__ $TMPFILE > $OUTFILE [ $? -gt 1 ] && exit 1 # Remove /* ... */ style comments, and find CONFIG_ references in code configs=$(sed -e ' :comment s:/\*[^*][^*]*:/*: s:/\*\*\**\([^/]\):/*\1: t comment s:/\*\*/: : t comment /\/\*/! b check N b comment :print P D :check s:^\(CONFIG_[[:alnum:]_]*\):\1\n: t print s:^[[:alnum:]_][[:alnum:]_]*:: s:^[^[:alnum:]_][^[:alnum:]_]*:: t check d ' $OUTFILE) # The entries in the following list do not result in an error. # Please do not add a new entry. This list is only for existing ones. # The list will be reduced gradually, and deleted eventually. (hopefully) # # The format is <file-name>:<CONFIG-option> in each line. config_leak_ignores=" arch/arc/include/uapi/asm/page.h:CONFIG_ARC_PAGE_SIZE_16K arch/arc/include/uapi/asm/page.h:CONFIG_ARC_PAGE_SIZE_4K arch/arc/include/uapi/asm/swab.h:CONFIG_ARC_HAS_SWAPE arch/arm/include/uapi/asm/ptrace.h:CONFIG_CPU_ENDIAN_BE8 arch/m68k/include/uapi/asm/ptrace.h:CONFIG_COLDFIRE arch/nios2/include/uapi/asm/swab.h:CONFIG_NIOS2_CI_SWAB_NO arch/nios2/include/uapi/asm/swab.h:CONFIG_NIOS2_CI_SWAB_SUPPORT arch/x86/include/uapi/asm/auxvec.h:CONFIG_IA32_EMULATION arch/x86/include/uapi/asm/auxvec.h:CONFIG_X86_64 " for c in $configs do leak_error=1 for ignore in $config_leak_ignores do if echo "$INFILE:$c" | grep -q "$ignore$"; then leak_error= break fi done if [ "$leak_error" = 1 ]; then echo "error: $INFILE: leak $c to user-space" >&2 exit 1 fi done rm -f $TMPFILE trap - EXIT