1 /* 2 * Kernel Probes (KProbes) 3 * include/asm-mips/kprobes.h 4 * 5 * Copyright 2006 Sony Corp. 6 * Copyright 2010 Cavium Networks 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; version 2 of the License. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 20 */ 21 22 #ifndef _ASM_KPROBES_H 23 #define _ASM_KPROBES_H 24 25 #include <asm-generic/kprobes.h> 26 27 #ifdef CONFIG_KPROBES 28 #include <linux/ptrace.h> 29 #include <linux/types.h> 30 31 #include <asm/cacheflush.h> 32 #include <asm/kdebug.h> 33 #include <asm/inst.h> 34 35 #define __ARCH_WANT_KPROBES_INSN_SLOT 36 37 struct kprobe; 38 struct pt_regs; 39 40 typedef union mips_instruction kprobe_opcode_t; 41 42 #define MAX_INSN_SIZE 2 43 44 #define flush_insn_slot(p) \ 45 do { \ 46 if (p->addr) \ 47 flush_icache_range((unsigned long)p->addr, \ 48 (unsigned long)p->addr + \ 49 (MAX_INSN_SIZE * sizeof(kprobe_opcode_t))); \ 50 } while (0) 51 52 53 #define kretprobe_blacklist_size 0 54 55 void arch_remove_kprobe(struct kprobe *p); 56 57 /* Architecture specific copy of original instruction*/ 58 struct arch_specific_insn { 59 /* copy of the original instruction */ 60 kprobe_opcode_t *insn; 61 }; 62 63 struct prev_kprobe { 64 struct kprobe *kp; 65 unsigned long status; 66 unsigned long old_SR; 67 unsigned long saved_SR; 68 unsigned long saved_epc; 69 }; 70 71 #define SKIP_DELAYSLOT 0x0001 72 73 /* per-cpu kprobe control block */ 74 struct kprobe_ctlblk { 75 unsigned long kprobe_status; 76 unsigned long kprobe_old_SR; 77 unsigned long kprobe_saved_SR; 78 unsigned long kprobe_saved_epc; 79 /* Per-thread fields, used while emulating branches */ 80 unsigned long flags; 81 unsigned long target_epc; 82 struct prev_kprobe prev_kprobe; 83 }; 84 85 extern int kprobe_exceptions_notify(struct notifier_block *self, 86 unsigned long val, void *data); 87 88 #endif /* CONFIG_KPROBES */ 89 #endif /* _ASM_KPROBES_H */ 90