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 int kprobe_fault_handler(struct pt_regs *regs, int trapnr); 45 46 /* Architecture specific copy of original instruction*/ 47 struct arch_specific_insn { 48 /* copy of the original instruction */ 49 kprobe_opcode_t *insn; 50 }; 51 52 struct prev_kprobe { 53 struct kprobe *kp; 54 unsigned long status; 55 unsigned long old_SR; 56 unsigned long saved_SR; 57 unsigned long saved_epc; 58 }; 59 60 #define SKIP_DELAYSLOT 0x0001 61 62 /* per-cpu kprobe control block */ 63 struct kprobe_ctlblk { 64 unsigned long kprobe_status; 65 unsigned long kprobe_old_SR; 66 unsigned long kprobe_saved_SR; 67 unsigned long kprobe_saved_epc; 68 /* Per-thread fields, used while emulating branches */ 69 unsigned long flags; 70 unsigned long target_epc; 71 struct prev_kprobe prev_kprobe; 72 }; 73 74 extern int kprobe_exceptions_notify(struct notifier_block *self, 75 unsigned long val, void *data); 76 77 #endif /* CONFIG_KPROBES */ 78 #endif /* _ASM_KPROBES_H */ 79