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41 lines
1.1 KiB
41 lines
1.1 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
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/* |
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* livepatch.h - powerpc-specific Kernel Live Patching Core |
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* |
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* Copyright (C) 2015-2016, SUSE, IBM Corp. |
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*/ |
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#ifndef _ASM_POWERPC_LIVEPATCH_H |
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#define _ASM_POWERPC_LIVEPATCH_H |
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#include <linux/module.h> |
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#include <linux/ftrace.h> |
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#include <linux/sched/task_stack.h> |
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#ifdef CONFIG_LIVEPATCH |
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static inline void klp_arch_set_pc(struct ftrace_regs *fregs, unsigned long ip) |
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{ |
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struct pt_regs *regs = ftrace_get_regs(fregs); |
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regs_set_return_ip(regs, ip); |
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} |
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#define klp_get_ftrace_location klp_get_ftrace_location |
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static inline unsigned long klp_get_ftrace_location(unsigned long faddr) |
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{ |
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/* |
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* Live patch works only with -mprofile-kernel on PPC. In this case, |
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* the ftrace location is always within the first 16 bytes. |
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*/ |
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return ftrace_location_range(faddr, faddr + 16); |
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} |
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static inline void klp_init_thread_info(struct task_struct *p) |
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{ |
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/* + 1 to account for STACK_END_MAGIC */ |
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task_thread_info(p)->livepatch_sp = end_of_stack(p) + 1; |
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} |
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#else |
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static inline void klp_init_thread_info(struct task_struct *p) { } |
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#endif /* CONFIG_LIVEPATCH */ |
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#endif /* _ASM_POWERPC_LIVEPATCH_H */
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