diff options
Diffstat (limited to 'scripts/headers_install.sh')
| -rwxr-xr-x | scripts/headers_install.sh | 108 |
1 files changed, 82 insertions, 26 deletions
diff --git a/scripts/headers_install.sh b/scripts/headers_install.sh index 593f8879c641..f7d9b114de8f 100755 --- a/scripts/headers_install.sh +++ b/scripts/headers_install.sh @@ -1,47 +1,103 @@ #!/bin/sh # SPDX-License-Identifier: GPL-2.0 -if [ $# -lt 2 ] +if [ $# -ne 2 ] then - echo "Usage: headers_install.sh OUTDIR SRCDIR [FILES...]" + 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 "OUTDIR: directory to write each userspace header FILE to." - echo "SRCDIR: source directory where files are picked." - echo "FILES: list of header files to operate on." + 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 -OUTDIR="$1" -shift -SRCDIR="$1" -shift +trap 'rm -f $OUTFILE $TMPFILE' EXIT -# Iterate through files listed on command line +# SPDX-License-Identifier with GPL variants must have "WITH Linux-syscall-note" +if [ -n "$(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 +' $OUTFILE) -FILE= -trap 'rm -f "$OUTDIR/$FILE" "$OUTDIR/$FILE.sed"' EXIT -for i in "$@" +# 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 $configs do - FILE="$(basename "$i")" - sed -E \ - -e 's/([[:space:](])(__user|__force|__iomem)[[:space:]]/\1/g' \ - -e 's/__attribute_const__([[:space:]]|$)/\1/g' \ - -e 's@^#include <linux/compiler(|_types).h>@@' \ - -e 's/(^|[^a-zA-Z0-9])__packed([^a-zA-Z0-9_]|$)/\1__attribute__((packed))\2/g' \ - -e 's/(^|[[:space:](])(inline|asm|volatile)([[:space:](]|$)/\1__\2__\3/g' \ - -e 's@#(ifndef|define|endif[[:space:]]*/[*])[[:space:]]*_UAPI@#\1 @' \ - "$SRCDIR/$i" > "$OUTDIR/$FILE.sed" || exit 1 - scripts/unifdef -U__KERNEL__ -D__EXPORTED_HEADERS__ "$OUTDIR/$FILE.sed" \ - > "$OUTDIR/$FILE" - [ $? -gt 1 ] && exit 1 - rm -f "$OUTDIR/$FILE.sed" + 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 |