| /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| #ifndef _ASM_X86_KPROBES_H |
| #define _ASM_X86_KPROBES_H |
| /* |
| * Kernel Probes (KProbes) |
| * |
| * Copyright (C) IBM Corporation, 2002, 2004 |
| * |
| * See arch/x86/kernel/kprobes.c for x86 kprobes history. |
| */ |
| |
| #include <asm-generic/kprobes.h> |
| |
| #ifdef CONFIG_KPROBES |
| #include <linux/types.h> |
| #include <linux/ptrace.h> |
| #include <linux/percpu.h> |
| #include <asm/text-patching.h> |
| #include <asm/insn.h> |
| |
| #define __ARCH_WANT_KPROBES_INSN_SLOT |
| |
| struct pt_regs; |
| struct kprobe; |
| |
| typedef u8 kprobe_opcode_t; |
| |
| #define MAX_STACK_SIZE 64 |
| #define CUR_STACK_SIZE(ADDR) \ |
| (current_top_of_stack() - (unsigned long)(ADDR)) |
| #define MIN_STACK_SIZE(ADDR) \ |
| (MAX_STACK_SIZE < CUR_STACK_SIZE(ADDR) ? \ |
| MAX_STACK_SIZE : CUR_STACK_SIZE(ADDR)) |
| |
| #define flush_insn_slot(p) do { } while (0) |
| |
| /* optinsn template addresses */ |
| extern __visible kprobe_opcode_t optprobe_template_entry[]; |
| extern __visible kprobe_opcode_t optprobe_template_val[]; |
| extern __visible kprobe_opcode_t optprobe_template_call[]; |
| extern __visible kprobe_opcode_t optprobe_template_end[]; |
| #define MAX_OPTIMIZED_LENGTH (MAX_INSN_SIZE + DISP32_SIZE) |
| #define MAX_OPTINSN_SIZE \ |
| (((unsigned long)optprobe_template_end - \ |
| (unsigned long)optprobe_template_entry) + \ |
| MAX_OPTIMIZED_LENGTH + JMP32_INSN_SIZE) |
| |
| extern const int kretprobe_blacklist_size; |
| |
| void arch_remove_kprobe(struct kprobe *p); |
| asmlinkage void kretprobe_trampoline(void); |
| |
| extern void arch_kprobe_override_function(struct pt_regs *regs); |
| |
| /* Architecture specific copy of original instruction*/ |
| struct arch_specific_insn { |
| /* copy of the original instruction */ |
| kprobe_opcode_t *insn; |
| /* |
| * boostable = false: This instruction type is not boostable. |
| * boostable = true: This instruction has been boosted: we have |
| * added a relative jump after the instruction copy in insn, |
| * so no single-step and fixup are needed (unless there's |
| * a post_handler). |
| */ |
| bool boostable; |
| bool if_modifier; |
| }; |
| |
| struct arch_optimized_insn { |
| /* copy of the original instructions */ |
| kprobe_opcode_t copied_insn[DISP32_SIZE]; |
| /* detour code buffer */ |
| kprobe_opcode_t *insn; |
| /* the size of instructions copied to detour code buffer */ |
| size_t size; |
| }; |
| |
| /* Return true (!0) if optinsn is prepared for optimization. */ |
| static inline int arch_prepared_optinsn(struct arch_optimized_insn *optinsn) |
| { |
| return optinsn->size; |
| } |
| |
| struct prev_kprobe { |
| struct kprobe *kp; |
| unsigned long status; |
| unsigned long old_flags; |
| unsigned long saved_flags; |
| }; |
| |
| /* per-cpu kprobe control block */ |
| struct kprobe_ctlblk { |
| unsigned long kprobe_status; |
| unsigned long kprobe_old_flags; |
| unsigned long kprobe_saved_flags; |
| struct prev_kprobe prev_kprobe; |
| }; |
| |
| extern int kprobe_fault_handler(struct pt_regs *regs, int trapnr); |
| extern int kprobe_exceptions_notify(struct notifier_block *self, |
| unsigned long val, void *data); |
| extern int kprobe_int3_handler(struct pt_regs *regs); |
| extern int kprobe_debug_handler(struct pt_regs *regs); |
| |
| #endif /* CONFIG_KPROBES */ |
| #endif /* _ASM_X86_KPROBES_H */ |