1 /* 2 * arch/tile/include/asm/kprobes.h 3 * 4 * Copyright 2012 Tilera Corporation. All Rights Reserved. 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License 8 * as published by the Free Software Foundation, version 2. 9 * 10 * This program is distributed in the hope that it will be useful, but 11 * WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or 13 * NON INFRINGEMENT. See the GNU General Public License for 14 * more details. 15 */ 16 17 #ifndef _ASM_TILE_KPROBES_H 18 #define _ASM_TILE_KPROBES_H 19 20 #include <asm-generic/kprobes.h> 21 22 #ifdef CONFIG_KPROBES 23 24 #include <linux/types.h> 25 #include <linux/ptrace.h> 26 #include <linux/percpu.h> 27 #include <arch/opcode.h> 28 29 #define __ARCH_WANT_KPROBES_INSN_SLOT 30 #define MAX_INSN_SIZE 2 31 32 #define kretprobe_blacklist_size 0 33 34 typedef tile_bundle_bits kprobe_opcode_t; 35 36 #define flush_insn_slot(p) \ 37 flush_icache_range((unsigned long)p->addr, \ 38 (unsigned long)p->addr + \ 39 (MAX_INSN_SIZE * sizeof(kprobe_opcode_t))) 40 41 struct kprobe; 42 43 /* Architecture specific copy of original instruction. */ 44 struct arch_specific_insn { 45 kprobe_opcode_t *insn; 46 }; 47 48 struct prev_kprobe { 49 struct kprobe *kp; 50 unsigned long status; 51 unsigned long saved_pc; 52 }; 53 54 #define MAX_JPROBES_STACK_SIZE 128 55 #define MAX_JPROBES_STACK_ADDR \ 56 (((unsigned long)current_thread_info()) + THREAD_SIZE - 32 \ 57 - sizeof(struct pt_regs)) 58 59 #define MIN_JPROBES_STACK_SIZE(ADDR) \ 60 ((((ADDR) + MAX_JPROBES_STACK_SIZE) > MAX_JPROBES_STACK_ADDR) \ 61 ? MAX_JPROBES_STACK_ADDR - (ADDR) \ 62 : MAX_JPROBES_STACK_SIZE) 63 64 /* per-cpu kprobe control block. */ 65 struct kprobe_ctlblk { 66 unsigned long kprobe_status; 67 unsigned long kprobe_saved_pc; 68 unsigned long jprobe_saved_sp; 69 struct prev_kprobe prev_kprobe; 70 struct pt_regs jprobe_saved_regs; 71 char jprobes_stack[MAX_JPROBES_STACK_SIZE]; 72 }; 73 74 extern tile_bundle_bits breakpoint2_insn; 75 extern tile_bundle_bits breakpoint_insn; 76 77 void arch_remove_kprobe(struct kprobe *); 78 79 extern int kprobe_exceptions_notify(struct notifier_block *self, 80 unsigned long val, void *data); 81 82 #endif /* CONFIG_KPROBES */ 83 #endif /* _ASM_TILE_KPROBES_H */ 84