^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /* SPDX-License-Identifier: GPL-2.0-or-later */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) #ifndef _ASM_X86_KPROBES_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) #define _ASM_X86_KPROBES_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Kernel Probes (KProbes)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Copyright (C) IBM Corporation, 2002, 2004
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * See arch/x86/kernel/kprobes.c for x86 kprobes history.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <asm-generic/kprobes.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #ifdef CONFIG_KPROBES
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/ptrace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/percpu.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <asm/text-patching.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <asm/insn.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #define __ARCH_WANT_KPROBES_INSN_SLOT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) struct pt_regs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) struct kprobe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) typedef u8 kprobe_opcode_t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #define MAX_STACK_SIZE 64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #define CUR_STACK_SIZE(ADDR) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) (current_top_of_stack() - (unsigned long)(ADDR))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #define MIN_STACK_SIZE(ADDR) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) (MAX_STACK_SIZE < CUR_STACK_SIZE(ADDR) ? \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) MAX_STACK_SIZE : CUR_STACK_SIZE(ADDR))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #define flush_insn_slot(p) do { } while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) /* optinsn template addresses */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) extern __visible kprobe_opcode_t optprobe_template_entry[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) extern __visible kprobe_opcode_t optprobe_template_clac[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) extern __visible kprobe_opcode_t optprobe_template_val[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) extern __visible kprobe_opcode_t optprobe_template_call[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) extern __visible kprobe_opcode_t optprobe_template_end[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #define MAX_OPTIMIZED_LENGTH (MAX_INSN_SIZE + DISP32_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #define MAX_OPTINSN_SIZE \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) (((unsigned long)optprobe_template_end - \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) (unsigned long)optprobe_template_entry) + \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) MAX_OPTIMIZED_LENGTH + JMP32_INSN_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) extern const int kretprobe_blacklist_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) void arch_remove_kprobe(struct kprobe *p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) asmlinkage void kretprobe_trampoline(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) extern void arch_kprobe_override_function(struct pt_regs *regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) /* Architecture specific copy of original instruction*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) struct arch_specific_insn {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) /* copy of the original instruction */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) kprobe_opcode_t *insn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) * boostable = false: This instruction type is not boostable.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) * boostable = true: This instruction has been boosted: we have
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) * added a relative jump after the instruction copy in insn,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) * so no single-step and fixup are needed (unless there's
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) * a post_handler).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) bool boostable;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) bool if_modifier;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) /* Number of bytes of text poked */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) int tp_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) struct arch_optimized_insn {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) /* copy of the original instructions */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) kprobe_opcode_t copied_insn[DISP32_SIZE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) /* detour code buffer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) kprobe_opcode_t *insn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) /* the size of instructions copied to detour code buffer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) size_t size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) /* Return true (!0) if optinsn is prepared for optimization. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) static inline int arch_prepared_optinsn(struct arch_optimized_insn *optinsn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) return optinsn->size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) struct prev_kprobe {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) struct kprobe *kp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) unsigned long status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) unsigned long old_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) unsigned long saved_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) /* per-cpu kprobe control block */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) struct kprobe_ctlblk {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) unsigned long kprobe_status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) unsigned long kprobe_old_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) unsigned long kprobe_saved_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) struct prev_kprobe prev_kprobe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) extern int kprobe_fault_handler(struct pt_regs *regs, int trapnr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) extern int kprobe_exceptions_notify(struct notifier_block *self,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) unsigned long val, void *data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) extern int kprobe_int3_handler(struct pt_regs *regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) extern int kprobe_debug_handler(struct pt_regs *regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) static inline int kprobe_debug_handler(struct pt_regs *regs) { return 0; }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) #endif /* CONFIG_KPROBES */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) #endif /* _ASM_X86_KPROBES_H */
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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