arch/riscv/include/asm/uprobes.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #ifndef _ASM_RISCV_UPROBES_H
   4 #define _ASM_RISCV_UPROBES_H
   5
   6 #include <asm/probes.h>
   7 #include <asm/patch.h>
   8 #include <asm/bug.h>
   9
  10 #define MAX_UINSN_BYTES         8
  11
  12 #ifdef CONFIG_RISCV_ISA_C
  13 #define UPROBE_SWBP_INSN        __BUG_INSN_16
  14 #define UPROBE_SWBP_INSN_SIZE   2
  15 #else
  16 #define UPROBE_SWBP_INSN        __BUG_INSN_32
  17 #define UPROBE_SWBP_INSN_SIZE   4
  18 #endif
  19 #define UPROBE_XOL_SLOT_BYTES   MAX_UINSN_BYTES
  20
  21 typedef u32 uprobe_opcode_t;
  22
  23 struct arch_uprobe_task {
  24         unsigned long   saved_cause;
  25 };
  26
  27 struct arch_uprobe {
  28         union {
  29                 u8 insn[MAX_UINSN_BYTES];
  30                 u8 ixol[MAX_UINSN_BYTES];
  31         };
  32         struct arch_probe_insn api;
  33         unsigned long insn_size;
  34         bool simulate;
  35 };
  36
  37 #ifdef CONFIG_UPROBES
  38 bool uprobe_breakpoint_handler(struct pt_regs *regs);
  39 bool uprobe_single_step_handler(struct pt_regs *regs);
  40 #else
  41 static inline bool uprobe_breakpoint_handler(struct pt_regs *regs)
  42 {
  43         return false;
  44 }
  45
  46 static inline bool uprobe_single_step_handler(struct pt_regs *regs)
  47 {
  48         return false;
  49 }
  50 #endif /* CONFIG_UPROBES */
  51 #endif /* _ASM_RISCV_UPROBES_H */