Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[linux-2.6-microblaze.git] / scripts / headers_install.sh
1 #!/bin/sh
2 # SPDX-License-Identifier: GPL-2.0
3
4 if [ $# -ne 2 ]
5 then
6         echo "Usage: headers_install.sh INFILE OUTFILE"
7         echo
8         echo "Prepares kernel header files for use by user space, by removing"
9         echo "all compiler.h definitions and #includes, removing any"
10         echo "#ifdef __KERNEL__ sections, and putting __underscores__ around"
11         echo "asm/inline/volatile keywords."
12         echo
13         echo "INFILE: header file to operate on"
14         echo "OUTFILE: output file which the processed header is writen to"
15
16         exit 1
17 fi
18
19 # Grab arguments
20 INFILE=$1
21 OUTFILE=$2
22 TMPFILE=$OUTFILE.tmp
23
24 trap 'rm -f $OUTFILE $TMPFILE' EXIT
25
26 # SPDX-License-Identifier with GPL variants must have "WITH Linux-syscall-note"
27 if [ -n "$(sed -n -e "/SPDX-License-Identifier:.*GPL-/{/WITH Linux-syscall-note/!p}" $INFILE)" ]; then
28         echo "error: $INFILE: missing \"WITH Linux-syscall-note\" for SPDX-License-Identifier" >&2
29         exit 1
30 fi
31
32 sed -E -e '
33         s/([[:space:](])(__user|__force|__iomem)[[:space:]]/\1/g
34         s/__attribute_const__([[:space:]]|$)/\1/g
35         s@^#include <linux/compiler(|_types).h>@@
36         s/(^|[^a-zA-Z0-9])__packed([^a-zA-Z0-9_]|$)/\1__attribute__((packed))\2/g
37         s/(^|[[:space:](])(inline|asm|volatile)([[:space:](]|$)/\1__\2__\3/g
38         s@#(ifndef|define|endif[[:space:]]*/[*])[[:space:]]*_UAPI@#\1 @
39 ' $INFILE > $TMPFILE || exit 1
40
41 scripts/unifdef -U__KERNEL__ -D__EXPORTED_HEADERS__ $TMPFILE > $OUTFILE
42 [ $? -gt 1 ] && exit 1
43
44 # Remove /* ... */ style comments, and find CONFIG_ references in code
45 configs=$(sed -e '
46 :comment
47         s:/\*[^*][^*]*:/*:
48         s:/\*\*\**\([^/]\):/*\1:
49         t comment
50         s:/\*\*/: :
51         t comment
52         /\/\*/! b check
53         N
54         b comment
55 :print
56         P
57         D
58 :check
59         s:^\(CONFIG_[[:alnum:]_]*\):\1\n:
60         t print
61         s:^[[:alnum:]_][[:alnum:]_]*::
62         s:^[^[:alnum:]_][^[:alnum:]_]*::
63         t check
64         d
65 ' $OUTFILE)
66
67 # The entries in the following list are not warned.
68 # Please do not add a new entry. This list is only for existing ones.
69 # The list will be reduced gradually, and deleted eventually. (hopefully)
70 #
71 # The format is <file-name>:<CONFIG-option> in each line.
72 config_leak_ignores="
73 arch/alpha/include/uapi/asm/setup.h:CONFIG_ALPHA_LEGACY_START_ADDRESS
74 arch/arc/include/uapi/asm/page.h:CONFIG_ARC_PAGE_SIZE_16K
75 arch/arc/include/uapi/asm/page.h:CONFIG_ARC_PAGE_SIZE_4K
76 arch/arc/include/uapi/asm/swab.h:CONFIG_ARC_HAS_SWAPE
77 arch/arm/include/uapi/asm/ptrace.h:CONFIG_CPU_ENDIAN_BE8
78 arch/hexagon/include/uapi/asm/ptrace.h:CONFIG_HEXAGON_ARCH_VERSION
79 arch/hexagon/include/uapi/asm/user.h:CONFIG_HEXAGON_ARCH_VERSION
80 arch/ia64/include/uapi/asm/cmpxchg.h:CONFIG_IA64_DEBUG_CMPXCHG
81 arch/m68k/include/uapi/asm/ptrace.h:CONFIG_COLDFIRE
82 arch/nios2/include/uapi/asm/swab.h:CONFIG_NIOS2_CI_SWAB_NO
83 arch/nios2/include/uapi/asm/swab.h:CONFIG_NIOS2_CI_SWAB_SUPPORT
84 arch/sh/include/uapi/asm/ptrace.h:CONFIG_CPU_SH5
85 arch/sh/include/uapi/asm/sigcontext.h:CONFIG_CPU_SH5
86 arch/sh/include/uapi/asm/stat.h:CONFIG_CPU_SH5
87 arch/x86/include/uapi/asm/auxvec.h:CONFIG_IA32_EMULATION
88 arch/x86/include/uapi/asm/auxvec.h:CONFIG_X86_64
89 arch/x86/include/uapi/asm/mman.h:CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS
90 include/uapi/asm-generic/fcntl.h:CONFIG_64BIT
91 include/uapi/linux/atmdev.h:CONFIG_COMPAT
92 include/uapi/linux/elfcore.h:CONFIG_BINFMT_ELF_FDPIC
93 include/uapi/linux/eventpoll.h:CONFIG_PM_SLEEP
94 include/uapi/linux/hw_breakpoint.h:CONFIG_HAVE_MIXED_BREAKPOINTS_REGS
95 include/uapi/linux/pktcdvd.h:CONFIG_CDROM_PKTCDVD_WCACHE
96 include/uapi/linux/raw.h:CONFIG_MAX_RAW_DEVS
97 "
98
99 for c in $configs
100 do
101         warn=1
102
103         for ignore in $config_leak_ignores
104         do
105                 if echo "$INFILE:$c" | grep -q "$ignore$"; then
106                         warn=
107                         break
108                 fi
109         done
110
111         if [ "$warn" = 1 ]; then
112                 echo "warning: $INFILE: leak $c to user-space" >&2
113         fi
114 done
115
116 rm -f $TMPFILE
117 trap - EXIT