livepatch.h (0337966d121ebebf73a1c346123e8112796e684e) livepatch.h (ed1cd6deb013a11959d17a94e35ce159197632da)
1/*
2 * livepatch.h - powerpc-specific Kernel Live Patching Core
3 *
4 * Copyright (C) 2015-2016, SUSE, IBM Corp.
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version 2

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16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, see <http://www.gnu.org/licenses/>.
18 */
19#ifndef _ASM_POWERPC_LIVEPATCH_H
20#define _ASM_POWERPC_LIVEPATCH_H
21
22#include <linux/module.h>
23#include <linux/ftrace.h>
1/*
2 * livepatch.h - powerpc-specific Kernel Live Patching Core
3 *
4 * Copyright (C) 2015-2016, SUSE, IBM Corp.
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version 2

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16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, see <http://www.gnu.org/licenses/>.
18 */
19#ifndef _ASM_POWERPC_LIVEPATCH_H
20#define _ASM_POWERPC_LIVEPATCH_H
21
22#include <linux/module.h>
23#include <linux/ftrace.h>
24#include <linux/sched/task_stack.h>
24
25#ifdef CONFIG_LIVEPATCH
26static inline int klp_check_compiler_support(void)
27{
28 return 0;
29}
30
31static inline void klp_arch_set_pc(struct pt_regs *regs, unsigned long ip)

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38{
39 /*
40 * Live patch works only with -mprofile-kernel on PPC. In this case,
41 * the ftrace location is always within the first 16 bytes.
42 */
43 return ftrace_location_range(faddr, faddr + 16);
44}
45
25
26#ifdef CONFIG_LIVEPATCH
27static inline int klp_check_compiler_support(void)
28{
29 return 0;
30}
31
32static inline void klp_arch_set_pc(struct pt_regs *regs, unsigned long ip)

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39{
40 /*
41 * Live patch works only with -mprofile-kernel on PPC. In this case,
42 * the ftrace location is always within the first 16 bytes.
43 */
44 return ftrace_location_range(faddr, faddr + 16);
45}
46
46static inline void klp_init_thread_info(struct thread_info *ti)
47static inline void klp_init_thread_info(struct task_struct *p)
47{
48 /* + 1 to account for STACK_END_MAGIC */
48{
49 /* + 1 to account for STACK_END_MAGIC */
49 ti->livepatch_sp = (unsigned long *)(ti + 1) + 1;
50 task_thread_info(p)->livepatch_sp = end_of_stack(p) + 1;
50}
51#else
51}
52#else
52static void klp_init_thread_info(struct thread_info *ti) { }
53static inline void klp_init_thread_info(struct task_struct *p) { }
53#endif /* CONFIG_LIVEPATCH */
54
55#endif /* _ASM_POWERPC_LIVEPATCH_H */
54#endif /* CONFIG_LIVEPATCH */
55
56#endif /* _ASM_POWERPC_LIVEPATCH_H */