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The utility macro from the sysfs core is sufficient to implement this attribute. Make use of it. Signed-off-by: Thomas Weißschuh <linux@weissschuh.net> Link: https://lore.kernel.org/r/20241221-sysfs-const-bin_attr-kheaders-v2-1-8205538aa012@weissschuh.net Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
53 lines
1.4 KiB
C
53 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Provide kernel headers useful to build tracing programs
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* such as for running eBPF tracing tools.
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*
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* (Borrowed code from kernel/configs.c)
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/kobject.h>
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#include <linux/init.h>
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/*
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* Define kernel_headers_data and kernel_headers_data_end, within which the
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* compressed kernel headers are stored. The file is first compressed with xz.
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*/
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asm (
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" .pushsection .rodata, \"a\" \n"
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" .global kernel_headers_data \n"
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"kernel_headers_data: \n"
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" .incbin \"kernel/kheaders_data.tar.xz\" \n"
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" .global kernel_headers_data_end \n"
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"kernel_headers_data_end: \n"
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" .popsection \n"
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);
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extern char kernel_headers_data[];
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extern char kernel_headers_data_end[];
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static struct bin_attribute kheaders_attr __ro_after_init =
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__BIN_ATTR_SIMPLE_RO(kheaders.tar.xz, 0444);
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static int __init ikheaders_init(void)
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{
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kheaders_attr.private = kernel_headers_data;
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kheaders_attr.size = (kernel_headers_data_end -
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kernel_headers_data);
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return sysfs_create_bin_file(kernel_kobj, &kheaders_attr);
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}
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static void __exit ikheaders_cleanup(void)
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{
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sysfs_remove_bin_file(kernel_kobj, &kheaders_attr);
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}
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module_init(ikheaders_init);
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module_exit(ikheaders_cleanup);
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MODULE_LICENSE("GPL v2");
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MODULE_AUTHOR("Joel Fernandes");
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MODULE_DESCRIPTION("Echo the kernel header artifacts used to build the kernel");
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