mirror of
https://github.com/linux-msm/laptops-kernel.git
synced 2026-08-13 14:19:53 -07:00
Thomas HuthandNicolas Schier
77e9bd85dc
A previous patch to headers_install.sh normalized the usage of __ASSEMBLER__ to __ASSEMBLY__ in the UAPI headers due to two reasons: 1) There was the concern that the UAPI headers might be used with non-GCC-compatible compilers, which do not define __ASSEMBLER__ automatically. But other C compilers like PCC (see https://github.com/IanHarvey/pcc/blob/cvs2git/2018.09.20/cc/cc/cc.1#L405) and Tiny-C (see https://repo.or.cz/tinycc.git/commitdiff/a25325e9be13e52a), are defining __ASSEMBLER__ for compiling assembler files, too, so using it in UAPI header files should really be fine. 2) During the migration phase, the UAPI headers will use a mix of *both* __ASSEMBLY__ and __ASSEMBLER__ at the same time, which is ugly and inconsistent. That's true. But since we already shipped a couple of kernel versions that used __ASSEMBLER__ in the UAPI headers for certain architectures, we might now break user space programs that have been developed with these kernel versions if we switch back to __ASSEMBLY__. Thus let's better always use the macro that is defined by the compilers and standardize on __ASSEMBLER__ instead of __ASSEMBLY__ in all of the UAPI header files now. Suggested-by: Thomas Weißschuh <linux@weissschuh.net> Link: https://lore.kernel.org/all/2030a963-33bc-43fe-9a2b-9c626d7d8360@redhat.com/ Reviewed-by: Nicolas Schier <n.schier@fritz.com> Tested-by: Nicolas Schier <n.schier@fritz.com> Signed-off-by: Thomas Huth <thuth@redhat.com> Link: https://patch.msgid.link/20260722072928.24500-1-thuth@redhat.com Signed-off-by: Nicolas Schier <nsc@kernel.org>
76 lines
1.8 KiB
Bash
Executable File
76 lines
1.8 KiB
Bash
Executable File
#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0
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if [ $# -ne 2 ]
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then
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echo "Usage: headers_install.sh INFILE OUTFILE"
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echo
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echo "Prepares kernel header files for use by user space, by removing"
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echo "all compiler.h definitions and #includes, removing any"
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echo "#ifdef __KERNEL__ sections, and putting __underscores__ around"
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echo "asm/inline/volatile keywords."
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echo
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echo "INFILE: header file to operate on"
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echo "OUTFILE: output file which the processed header is written to"
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exit 1
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fi
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# Grab arguments
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INFILE=$1
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OUTFILE=$2
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TMPFILE=$OUTFILE.tmp
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trap 'rm -f $OUTFILE $TMPFILE' EXIT
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# SPDX-License-Identifier with GPL variants must have "WITH Linux-syscall-note"
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if [ -n "$(sed -n -e "/SPDX-License-Identifier:.*GPL-/{/WITH Linux-syscall-note/!p}" $INFILE)" ]; then
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echo "error: $INFILE: missing \"WITH Linux-syscall-note\" for SPDX-License-Identifier" >&2
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exit 1
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fi
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sed -E -e '
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s/([[:space:](])(__user|__force|__iomem)[[:space:]]/\1/g
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s/__attribute_const__([[:space:]]|$)/\1/g
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s@^#include <linux/compiler.h>@@
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s/(^|[^a-zA-Z0-9])__packed([^a-zA-Z0-9_]|$)/\1__attribute__((packed))\2/g
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s/(^|[[:space:](])(inline|asm|volatile)([[:space:](]|$)/\1__\2__\3/g
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s@#(ifndef|define|endif[[:space:]]*/[*])[[:space:]]*_UAPI@#\1 @
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s/__ASSEMBLY__/__ASSEMBLER__/g
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' $INFILE > $TMPFILE || exit 1
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scripts/unifdef -U__KERNEL__ -D__EXPORTED_HEADERS__ $TMPFILE > $OUTFILE
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[ $? -gt 1 ] && exit 1
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# Remove /* ... */ style comments, and find CONFIG_ references in code
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configs=$(sed -e '
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:comment
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s:/\*[^*][^*]*:/*:
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s:/\*\*\**\([^/]\):/*\1:
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t comment
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s:/\*\*/: :
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t comment
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/\/\*/! b check
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N
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b comment
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:print
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P
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D
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:check
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s:^\(CONFIG_[[:alnum:]_]*\):\1\n:
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t print
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s:^[[:alnum:]_][[:alnum:]_]*::
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s:^[^[:alnum:]_][^[:alnum:]_]*::
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t check
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d
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' $OUTFILE)
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for c in $configs
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do
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echo "error: $INFILE: leak $c to user-space" >&2
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exit 1
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done
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rm -f $TMPFILE
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trap - EXIT
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