86 lines
2.2 KiB
C
86 lines
2.2 KiB
C
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/* SPDX-License-Identifier: GPL-2.0+ */
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#ifndef _ASM_S390_KPROBES_H
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#define _ASM_S390_KPROBES_H
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/*
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* Kernel Probes (KProbes)
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*
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* Copyright IBM Corp. 2002, 2006
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*
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* 2002-Oct Created by Vamsi Krishna S <vamsi_krishna@in.ibm.com> Kernel
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* Probes initial implementation ( includes suggestions from
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* Rusty Russell).
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* 2004-Nov Modified for PPC64 by Ananth N Mavinakayanahalli
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* <ananth@in.ibm.com>
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* 2005-Dec Used as a template for s390 by Mike Grundy
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* <grundym@us.ibm.com>
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*/
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#include <linux/types.h>
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#include <asm-generic/kprobes.h>
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#define BREAKPOINT_INSTRUCTION 0x0002
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#define FIXUP_PSW_NORMAL 0x08
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#define FIXUP_BRANCH_NOT_TAKEN 0x04
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#define FIXUP_RETURN_REGISTER 0x02
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#define FIXUP_NOT_REQUIRED 0x01
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int probe_is_prohibited_opcode(u16 *insn);
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int probe_get_fixup_type(u16 *insn);
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int probe_is_insn_relative_long(u16 *insn);
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#ifdef CONFIG_KPROBES
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#include <linux/ptrace.h>
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#include <linux/percpu.h>
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#include <linux/sched/task_stack.h>
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#define __ARCH_WANT_KPROBES_INSN_SLOT
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struct pt_regs;
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struct kprobe;
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typedef u16 kprobe_opcode_t;
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/* Maximum instruction size is 3 (16bit) halfwords: */
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#define MAX_INSN_SIZE 0x0003
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#define MAX_STACK_SIZE 64
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#define MIN_STACK_SIZE(ADDR) (((MAX_STACK_SIZE) < \
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(((unsigned long)task_stack_page(current)) + THREAD_SIZE - (ADDR))) \
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? (MAX_STACK_SIZE) \
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: (((unsigned long)task_stack_page(current)) + THREAD_SIZE - (ADDR)))
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#define kretprobe_blacklist_size 0
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/* Architecture specific copy of original instruction */
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struct arch_specific_insn {
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/* copy of original instruction */
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kprobe_opcode_t *insn;
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unsigned int is_ftrace_insn : 1;
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};
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struct prev_kprobe {
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struct kprobe *kp;
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unsigned long status;
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};
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/* per-cpu kprobe control block */
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struct kprobe_ctlblk {
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unsigned long kprobe_status;
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unsigned long kprobe_saved_imask;
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unsigned long kprobe_saved_ctl[3];
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struct prev_kprobe prev_kprobe;
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struct pt_regs jprobe_saved_regs;
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kprobe_opcode_t jprobes_stack[MAX_STACK_SIZE];
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};
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void arch_remove_kprobe(struct kprobe *p);
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void kretprobe_trampoline(void);
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int kprobe_fault_handler(struct pt_regs *regs, int trapnr);
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int kprobe_exceptions_notify(struct notifier_block *self,
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unsigned long val, void *data);
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#define flush_insn_slot(p) do { } while (0)
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#endif /* CONFIG_KPROBES */
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#endif /* _ASM_S390_KPROBES_H */
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