arch/mips/include/asm/kprobes.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  *  Kernel Probes (KProbes)
   4  *  include/asm-mips/kprobes.h
   5  *
   6  *  Copyright 2006 Sony Corp.
   7  *  Copyright 2010 Cavium Networks
   8  */
   9
  10 #ifndef _ASM_KPROBES_H
  11 #define _ASM_KPROBES_H
  12
  13 #include <asm-generic/kprobes.h>
  14
  15 #ifdef CONFIG_KPROBES
  16 #include <linux/ptrace.h>
  17 #include <linux/types.h>
  18
  19 #include <asm/cacheflush.h>
  20 #include <asm/kdebug.h>
  21 #include <asm/inst.h>
  22
  23 #define  __ARCH_WANT_KPROBES_INSN_SLOT
  24
  25 struct kprobe;
  26 struct pt_regs;
  27
  28 typedef union mips_instruction kprobe_opcode_t;
  29
  30 #define MAX_INSN_SIZE 2
  31
  32 #define flush_insn_slot(p)                                              \
  33 do {                                                                    \
  34         if (p->addr)                                                    \
  35                 flush_icache_range((unsigned long)p->addr,              \
  36                            (unsigned long)p->addr +                     \
  37                            (MAX_INSN_SIZE * sizeof(kprobe_opcode_t)));  \
  38 } while (0)
  39
  40
  41 #define kretprobe_blacklist_size 0
  42
  43 void arch_remove_kprobe(struct kprobe *p);
  44
  45 /* Architecture specific copy of original instruction*/
  46 struct arch_specific_insn {
  47         /* copy of the original instruction */
  48         kprobe_opcode_t *insn;
  49 };
  50
  51 struct prev_kprobe {
  52         struct kprobe *kp;
  53         unsigned long status;
  54         unsigned long old_SR;
  55         unsigned long saved_SR;
  56         unsigned long saved_epc;
  57 };
  58
  59 #define SKIP_DELAYSLOT 0x0001
  60
  61 /* per-cpu kprobe control block */
  62 struct kprobe_ctlblk {
  63         unsigned long kprobe_status;
  64         unsigned long kprobe_old_SR;
  65         unsigned long kprobe_saved_SR;
  66         unsigned long kprobe_saved_epc;
  67         /* Per-thread fields, used while emulating branches */
  68         unsigned long flags;
  69         unsigned long target_epc;
  70         struct prev_kprobe prev_kprobe;
  71 };
  72
  73 extern int kprobe_exceptions_notify(struct notifier_block *self,
  74                                     unsigned long val, void *data);
  75
  76 #endif /* CONFIG_KPROBES */
  77 #endif /* _ASM_KPROBES_H */