1 files changed, 53 insertions, 0 deletions
diff --git a/kernel/kheaders.c b/kernel/kheaders.c
new file mode 100644
index 000000000000..378088b07f46
--- /dev/null
+++ b/kernel/kheaders.c
@@ -0,0 +1,53 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Provide kernel headers useful to build tracing programs
+ * such as for running eBPF tracing tools.
+ *
+ * (Borrowed code from kernel/configs.c)
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/kobject.h>
+#include <linux/init.h>
+
+/*
+ * Define kernel_headers_data and kernel_headers_data_end, within which the
+ * compressed kernel headers are stored. The file is first compressed with xz.
+ */
+
+asm (
+"	.pushsection .rodata, \"a\"		\n"
+"	.global kernel_headers_data		\n"
+"kernel_headers_data:				\n"
+"	.incbin \"kernel/kheaders_data.tar.xz\"	\n"
+"	.global kernel_headers_data_end		\n"
+"kernel_headers_data_end:			\n"
+"	.popsection				\n"
+);
+
+extern char kernel_headers_data[];
+extern char kernel_headers_data_end[];
+
+static struct bin_attribute kheaders_attr __ro_after_init =
+	__BIN_ATTR_SIMPLE_RO(kheaders.tar.xz, 0444);
+
+static int __init ikheaders_init(void)
+{
+	kheaders_attr.private = kernel_headers_data;
+	kheaders_attr.size = (kernel_headers_data_end -
+			      kernel_headers_data);
+	return sysfs_create_bin_file(kernel_kobj, &kheaders_attr);
+}
+
+static void __exit ikheaders_cleanup(void)
+{
+	sysfs_remove_bin_file(kernel_kobj, &kheaders_attr);
+}
+
+module_init(ikheaders_init);
+module_exit(ikheaders_cleanup);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Joel Fernandes");
+MODULE_DESCRIPTION("Echo the kernel header artifacts used to build the kernel");