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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 | #ifndef _ASM_S390_KPROBES_H #define _ASM_S390_KPROBES_H /* * Kernel Probes (KProbes) * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * * Copyright (C) IBM Corporation, 2002, 2006 * * 2002-Oct Created by Vamsi Krishna S <vamsi_krishna@in.ibm.com> Kernel * Probes initial implementation ( includes suggestions from * Rusty Russell). * 2004-Nov Modified for PPC64 by Ananth N Mavinakayanahalli * <ananth@in.ibm.com> * 2005-Dec Used as a template for s390 by Mike Grundy * <grundym@us.ibm.com> */ #include <linux/types.h> #include <linux/ptrace.h> #include <linux/percpu.h> #define __ARCH_WANT_KPROBES_INSN_SLOT struct pt_regs; struct kprobe; typedef u16 kprobe_opcode_t; #define BREAKPOINT_INSTRUCTION 0x0002 /* Maximum instruction size is 3 (16bit) halfwords: */ #define MAX_INSN_SIZE 0x0003 #define MAX_STACK_SIZE 64 #define MIN_STACK_SIZE(ADDR) (((MAX_STACK_SIZE) < \ (((unsigned long)current_thread_info()) + THREAD_SIZE - (ADDR))) \ ? (MAX_STACK_SIZE) \ : (((unsigned long)current_thread_info()) + THREAD_SIZE - (ADDR))) #define kretprobe_blacklist_size 0 #define KPROBE_SWAP_INST 0x10 #define FIXUP_PSW_NORMAL 0x08 #define FIXUP_BRANCH_NOT_TAKEN 0x04 #define FIXUP_RETURN_REGISTER 0x02 #define FIXUP_NOT_REQUIRED 0x01 /* Architecture specific copy of original instruction */ struct arch_specific_insn { /* copy of original instruction */ kprobe_opcode_t *insn; int fixup; int ilen; int reg; }; struct ins_replace_args { kprobe_opcode_t *ptr; kprobe_opcode_t old; kprobe_opcode_t new; }; struct prev_kprobe { struct kprobe *kp; unsigned long status; unsigned long saved_psw; unsigned long kprobe_saved_imask; unsigned long kprobe_saved_ctl[3]; }; /* per-cpu kprobe control block */ struct kprobe_ctlblk { unsigned long kprobe_status; unsigned long kprobe_saved_imask; unsigned long kprobe_saved_ctl[3]; struct pt_regs jprobe_saved_regs; unsigned long jprobe_saved_r14; unsigned long jprobe_saved_r15; struct prev_kprobe prev_kprobe; kprobe_opcode_t jprobes_stack[MAX_STACK_SIZE]; }; void arch_remove_kprobe(struct kprobe *p); void kretprobe_trampoline(void); int is_prohibited_opcode(kprobe_opcode_t *instruction); void get_instruction_type(struct arch_specific_insn *ainsn); int kprobe_fault_handler(struct pt_regs *regs, int trapnr); int kprobe_exceptions_notify(struct notifier_block *self, unsigned long val, void *data); #define flush_insn_slot(p) do { } while (0) #endif /* _ASM_S390_KPROBES_H */ |