arch/sh/include/asm/kprobes.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __ASM_SH_KPROBES_H
   3 #define __ASM_SH_KPROBES_H
   4
   5 #include <asm-generic/kprobes.h>
   6
   7 #define BREAKPOINT_INSTRUCTION  0xc33a
   8
   9 #ifdef CONFIG_KPROBES
  10
  11 #include <linux/types.h>
  12 #include <linux/ptrace.h>
  13
  14 typedef insn_size_t kprobe_opcode_t;
  15
  16 #define MAX_INSN_SIZE 16
  17 #define MAX_STACK_SIZE 64
  18 #define MIN_STACK_SIZE(ADDR) (((MAX_STACK_SIZE) < \
  19         (((unsigned long)current_thread_info()) + THREAD_SIZE - (ADDR))) \
  20         ? (MAX_STACK_SIZE) \
  21         : (((unsigned long)current_thread_info()) + THREAD_SIZE - (ADDR)))
  22
  23 #define flush_insn_slot(p)              do { } while (0)
  24 #define kretprobe_blacklist_size        0
  25
  26 struct kprobe;
  27
  28 void arch_remove_kprobe(struct kprobe *);
  29 void __kretprobe_trampoline(void);
  30
  31 /* Architecture specific copy of original instruction*/
  32 struct arch_specific_insn {
  33         /* copy of the original instruction */
  34         kprobe_opcode_t insn[MAX_INSN_SIZE];
  35 };
  36
  37 struct prev_kprobe {
  38         struct kprobe *kp;
  39         unsigned long status;
  40 };
  41
  42 /* per-cpu kprobe control block */
  43 struct kprobe_ctlblk {
  44         unsigned long kprobe_status;
  45         struct prev_kprobe prev_kprobe;
  46 };
  47
  48 extern int kprobe_fault_handler(struct pt_regs *regs, int trapnr);
  49 extern int kprobe_handle_illslot(unsigned long pc);
  50 #else
  51
  52 #define kprobe_handle_illslot(pc)       (-1)
  53
  54 #endif /* CONFIG_KPROBES */
  55 #endif /* __ASM_SH_KPROBES_H */