1*c1bf207dSDavid Daney /* 2*c1bf207dSDavid Daney * Kernel Probes (KProbes) 3*c1bf207dSDavid Daney * include/asm-mips/kprobes.h 4*c1bf207dSDavid Daney * 5*c1bf207dSDavid Daney * Copyright 2006 Sony Corp. 6*c1bf207dSDavid Daney * Copyright 2010 Cavium Networks 7*c1bf207dSDavid Daney * 8*c1bf207dSDavid Daney * This program is free software; you can redistribute it and/or modify 9*c1bf207dSDavid Daney * it under the terms of the GNU General Public License as published by 10*c1bf207dSDavid Daney * the Free Software Foundation; version 2 of the License. 11*c1bf207dSDavid Daney * 12*c1bf207dSDavid Daney * This program is distributed in the hope that it will be useful, 13*c1bf207dSDavid Daney * but WITHOUT ANY WARRANTY; without even the implied warranty of 14*c1bf207dSDavid Daney * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15*c1bf207dSDavid Daney * GNU General Public License for more details. 16*c1bf207dSDavid Daney * 17*c1bf207dSDavid Daney * You should have received a copy of the GNU General Public License 18*c1bf207dSDavid Daney * along with this program; if not, write to the Free Software 19*c1bf207dSDavid Daney * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 20*c1bf207dSDavid Daney */ 21*c1bf207dSDavid Daney 22*c1bf207dSDavid Daney #ifndef _ASM_KPROBES_H 23*c1bf207dSDavid Daney #define _ASM_KPROBES_H 24*c1bf207dSDavid Daney 25*c1bf207dSDavid Daney #include <linux/ptrace.h> 26*c1bf207dSDavid Daney #include <linux/types.h> 27*c1bf207dSDavid Daney 28*c1bf207dSDavid Daney #include <asm/cacheflush.h> 29*c1bf207dSDavid Daney #include <asm/kdebug.h> 30*c1bf207dSDavid Daney #include <asm/inst.h> 31*c1bf207dSDavid Daney 32*c1bf207dSDavid Daney #define __ARCH_WANT_KPROBES_INSN_SLOT 33*c1bf207dSDavid Daney 34*c1bf207dSDavid Daney struct kprobe; 35*c1bf207dSDavid Daney struct pt_regs; 36*c1bf207dSDavid Daney 37*c1bf207dSDavid Daney typedef union mips_instruction kprobe_opcode_t; 38*c1bf207dSDavid Daney 39*c1bf207dSDavid Daney #define MAX_INSN_SIZE 2 40*c1bf207dSDavid Daney 41*c1bf207dSDavid Daney #define flush_insn_slot(p) \ 42*c1bf207dSDavid Daney do { \ 43*c1bf207dSDavid Daney flush_icache_range((unsigned long)p->addr, \ 44*c1bf207dSDavid Daney (unsigned long)p->addr + \ 45*c1bf207dSDavid Daney (MAX_INSN_SIZE * sizeof(kprobe_opcode_t))); \ 46*c1bf207dSDavid Daney } while (0) 47*c1bf207dSDavid Daney 48*c1bf207dSDavid Daney 49*c1bf207dSDavid Daney #define kretprobe_blacklist_size 0 50*c1bf207dSDavid Daney 51*c1bf207dSDavid Daney void arch_remove_kprobe(struct kprobe *p); 52*c1bf207dSDavid Daney 53*c1bf207dSDavid Daney /* Architecture specific copy of original instruction*/ 54*c1bf207dSDavid Daney struct arch_specific_insn { 55*c1bf207dSDavid Daney /* copy of the original instruction */ 56*c1bf207dSDavid Daney kprobe_opcode_t *insn; 57*c1bf207dSDavid Daney }; 58*c1bf207dSDavid Daney 59*c1bf207dSDavid Daney struct prev_kprobe { 60*c1bf207dSDavid Daney struct kprobe *kp; 61*c1bf207dSDavid Daney unsigned long status; 62*c1bf207dSDavid Daney unsigned long old_SR; 63*c1bf207dSDavid Daney unsigned long saved_SR; 64*c1bf207dSDavid Daney unsigned long saved_epc; 65*c1bf207dSDavid Daney }; 66*c1bf207dSDavid Daney 67*c1bf207dSDavid Daney #define MAX_JPROBES_STACK_SIZE 128 68*c1bf207dSDavid Daney #define MAX_JPROBES_STACK_ADDR \ 69*c1bf207dSDavid Daney (((unsigned long)current_thread_info()) + THREAD_SIZE - 32 - sizeof(struct pt_regs)) 70*c1bf207dSDavid Daney 71*c1bf207dSDavid Daney #define MIN_JPROBES_STACK_SIZE(ADDR) \ 72*c1bf207dSDavid Daney ((((ADDR) + MAX_JPROBES_STACK_SIZE) > MAX_JPROBES_STACK_ADDR) \ 73*c1bf207dSDavid Daney ? MAX_JPROBES_STACK_ADDR - (ADDR) \ 74*c1bf207dSDavid Daney : MAX_JPROBES_STACK_SIZE) 75*c1bf207dSDavid Daney 76*c1bf207dSDavid Daney 77*c1bf207dSDavid Daney /* per-cpu kprobe control block */ 78*c1bf207dSDavid Daney struct kprobe_ctlblk { 79*c1bf207dSDavid Daney unsigned long kprobe_status; 80*c1bf207dSDavid Daney unsigned long kprobe_old_SR; 81*c1bf207dSDavid Daney unsigned long kprobe_saved_SR; 82*c1bf207dSDavid Daney unsigned long kprobe_saved_epc; 83*c1bf207dSDavid Daney unsigned long jprobe_saved_sp; 84*c1bf207dSDavid Daney struct pt_regs jprobe_saved_regs; 85*c1bf207dSDavid Daney u8 jprobes_stack[MAX_JPROBES_STACK_SIZE]; 86*c1bf207dSDavid Daney struct prev_kprobe prev_kprobe; 87*c1bf207dSDavid Daney }; 88*c1bf207dSDavid Daney 89*c1bf207dSDavid Daney extern int kprobe_exceptions_notify(struct notifier_block *self, 90*c1bf207dSDavid Daney unsigned long val, void *data); 91*c1bf207dSDavid Daney 92*c1bf207dSDavid Daney #endif /* _ASM_KPROBES_H */ 93