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 */ 62