1 /* SPDX-License-Identifier: GPL-2.0 */
2 
3 #include <linux/linkage.h>
4 
5 /*
6  * insn_page is a special 4k aligned dummy function for kprobes.
7  * It will contain all kprobed instructions that are out-of-line executed.
8  * The page must be within the kernel image to guarantee that the
9  * out-of-line instructions are within 2GB distance of their original
10  * location. Using a dummy function ensures that the insn_page is within
11  * the text section of the kernel and mapped read-only/executable from
12  * the beginning on, thus avoiding to split large mappings if the page
13  * would be in the data section instead.
14  */
15 	.section .kprobes.text, "ax"
16 	.align 4096
17 ENTRY(kprobes_insn_page)
18 	.rept 2048
19 	.word 0x07fe
20 	.endr
21 ENDPROC(kprobes_insn_page)
22 	.previous
23