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 */ 78