| 1 | |
| 2 | |
| 3 |
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| 4 | if [ $# -ne 2 ]
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| 5 | then
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| 6 | echo "Usage: headers_install.sh INFILE OUTFILE"
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| 7 | echo
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| 8 | echo "Prepares kernel header files for use by user space, by removing"
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| 9 | echo "all compiler.h definitions and #includes, removing any"
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| 10 | echo "#ifdef __KERNEL__ sections, and putting __underscores__ around"
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| 11 | echo "asm/inline/volatile keywords."
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| 12 | echo
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| 13 | echo "INFILE: header file to operate on"
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| 14 | echo "OUTFILE: output file which the processed header is written to"
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| 15 |
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| 16 | exit 1
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| 17 | fi
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| 18 |
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| 19 | |
| 20 | INFILE=$1
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| 21 | OUTFILE=$2
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| 22 | TMPFILE=$OUTFILE.tmp
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| 23 |
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| 24 | trap 'rm -f $OUTFILE $TMPFILE' EXIT
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| 25 |
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| 26 | |
| 27 | if [ -n "$(sed -n -e "/SPDX-License-Identifier:.*GPL-/{/WITH Linux-syscall-note/!p}" $INFILE)" ]; then
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| 28 | echo "error: $INFILE: missing \"WITH Linux-syscall-note\" for SPDX-License-Identifier" >&2
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| 29 | exit 1
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| 30 | fi
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| 31 |
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| 32 | sed -E -e '
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| 33 | s/([[:space:](])(__user|__force|__iomem)[[:space:]]/\1/g
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| 34 | s/__attribute_const__([[:space:]]|$)/\1/g
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| 35 | s@^#include <linux/compiler(|_types).h>@@
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| 36 | s/(^|[^a-zA-Z0-9])__packed([^a-zA-Z0-9_]|$)/\1__attribute__((packed))\2/g
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| 37 | s/(^|[[:space:](])(inline|asm|volatile)([[:space:](]|$)/\1__\2__\3/g
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| 38 | s@#(ifndef|define|endif[[:space:]]*/[*])[[:space:]]*_UAPI@#\1 @
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| 39 | ' $INFILE > $TMPFILE || exit 1
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| 40 |
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| 41 | scripts/unifdef -U__KERNEL__ -D__EXPORTED_HEADERS__ $TMPFILE > $OUTFILE
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| 42 | [ $? -gt 1 ] && exit 1
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| 43 |
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| 44 | |
| 45 | configs=$(sed -e '
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| 46 | :comment
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| 47 | s:/\*[^*][^*]*:/*:
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| 48 | s:/\*\*\**\([^/]\):/*\1:
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| 49 | t comment
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| 50 | s:/\*\*/: :
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| 51 | t comment
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| 52 | /\/\*/! b check
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| 53 | N
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| 54 | b comment
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| 55 | :print
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| 56 | P
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| 57 | D
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| 58 | :check
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| 59 | s:^\(CONFIG_[[:alnum:]_]*\):\1\n:
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| 60 | t print
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| 61 | s:^[[:alnum:]_][[:alnum:]_]*::
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| 62 | s:^[^[:alnum:]_][^[:alnum:]_]*::
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| 63 | t check
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| 64 | d
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| 65 | ' $OUTFILE)
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| 66 |
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| 67 | |
| 68 | |
| 69 | |
| 70 | |
| 71 | |
| 72 | config_leak_ignores="
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| 73 | arch/arc/include/uapi/asm/page.h:CONFIG_ARC_PAGE_SIZE_16K
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| 74 | arch/arc/include/uapi/asm/page.h:CONFIG_ARC_PAGE_SIZE_4K
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| 75 | arch/arc/include/uapi/asm/swab.h:CONFIG_ARC_HAS_SWAPE
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| 76 | arch/arm/include/uapi/asm/ptrace.h:CONFIG_CPU_ENDIAN_BE8
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| 77 | arch/nios2/include/uapi/asm/swab.h:CONFIG_NIOS2_CI_SWAB_NO
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| 78 | arch/nios2/include/uapi/asm/swab.h:CONFIG_NIOS2_CI_SWAB_SUPPORT
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| 79 | arch/x86/include/uapi/asm/auxvec.h:CONFIG_IA32_EMULATION
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| 80 | arch/x86/include/uapi/asm/auxvec.h:CONFIG_X86_64
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| 81 | "
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| 82 |
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| 83 | for c in $configs
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| 84 | do
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| 85 | leak_error=1
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| 86 |
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| 87 | for ignore in $config_leak_ignores
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| 88 | do
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| 89 | if echo "$INFILE:$c" | grep -q "$ignore$"; then
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| 90 | leak_error=
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| 91 | break
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| 92 | fi
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| 93 | done
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| 94 |
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| 95 | if [ "$leak_error" = 1 ]; then
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| 96 | echo "error: $INFILE: leak $c to user-space" >&2
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| 97 | exit 1
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| 98 | fi
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| 99 | done
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| 100 |
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| 101 | rm -f $TMPFILE
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| 102 | trap - EXIT
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