arch/loongarch/include/asm/kprobes.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 #ifndef __ASM_LOONGARCH_KPROBES_H
   3 #define __ASM_LOONGARCH_KPROBES_H
   4
   5 #include <asm-generic/kprobes.h>
   6
   7 #ifdef CONFIG_KPROBES
   8
   9 #include <asm/inst.h>
  10 #include <asm/cacheflush.h>
  11
  12 #define __ARCH_WANT_KPROBES_INSN_SLOT
  13 #define MAX_INSN_SIZE                   2
  14
  15 #define flush_insn_slot(p)                                              \
  16 do {                                                                    \
  17         if (p->addr)                                                    \
  18                 flush_icache_range((unsigned long)p->addr,              \
  19                            (unsigned long)p->addr +                     \
  20                            (MAX_INSN_SIZE * sizeof(kprobe_opcode_t)));  \
  21 } while (0)
  22
  23 #define kretprobe_blacklist_size        0
  24
  25 typedef union loongarch_instruction kprobe_opcode_t;
  26
  27 /* Architecture specific copy of original instruction */
  28 struct arch_specific_insn {
  29         /* copy of the original instruction */
  30         kprobe_opcode_t *insn;
  31         /* restore address after simulation */
  32         unsigned long restore;
  33 };
  34
  35 struct prev_kprobe {
  36         struct kprobe *kp;
  37         unsigned int status;
  38 };
  39
  40 /* per-cpu kprobe control block */
  41 struct kprobe_ctlblk {
  42         unsigned int kprobe_status;
  43         unsigned long saved_status;
  44         struct prev_kprobe prev_kprobe;
  45 };
  46
  47 void arch_remove_kprobe(struct kprobe *p);
  48 bool kprobe_fault_handler(struct pt_regs *regs, int trapnr);
  49 bool kprobe_breakpoint_handler(struct pt_regs *regs);
  50 bool kprobe_singlestep_handler(struct pt_regs *regs);
  51
  52 void __kretprobe_trampoline(void);
  53 void *trampoline_probe_handler(struct pt_regs *regs);
  54
  55 #else /* !CONFIG_KPROBES */
  56
  57 static inline bool kprobe_breakpoint_handler(struct pt_regs *regs) { return false; }
  58 static inline bool kprobe_singlestep_handler(struct pt_regs *regs) { return false; }
  59
  60 #endif /* CONFIG_KPROBES */
  61 #endif /* __ASM_LOONGARCH_KPROBES_H */