Michael Grundy | 4ba069b | 2006-09-20 15:58:39 +0200 | [diff] [blame] | 1 | #ifndef _ASM_S390_KPROBES_H |
| 2 | #define _ASM_S390_KPROBES_H |
| 3 | /* |
| 4 | * Kernel Probes (KProbes) |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 19 | * |
Heiko Carstens | a53c8fa | 2012-07-20 11:15:04 +0200 | [diff] [blame] | 20 | * Copyright IBM Corp. 2002, 2006 |
Michael Grundy | 4ba069b | 2006-09-20 15:58:39 +0200 | [diff] [blame] | 21 | * |
| 22 | * 2002-Oct Created by Vamsi Krishna S <vamsi_krishna@in.ibm.com> Kernel |
| 23 | * Probes initial implementation ( includes suggestions from |
| 24 | * Rusty Russell). |
| 25 | * 2004-Nov Modified for PPC64 by Ananth N Mavinakayanahalli |
| 26 | * <ananth@in.ibm.com> |
| 27 | * 2005-Dec Used as a template for s390 by Mike Grundy |
| 28 | * <grundym@us.ibm.com> |
| 29 | */ |
| 30 | #include <linux/types.h> |
| 31 | #include <linux/ptrace.h> |
| 32 | #include <linux/percpu.h> |
| 33 | |
Heiko Carstens | 63c4043 | 2013-09-11 14:24:14 -0700 | [diff] [blame] | 34 | #define __ARCH_WANT_KPROBES_INSN_SLOT |
| 35 | |
Michael Grundy | 4ba069b | 2006-09-20 15:58:39 +0200 | [diff] [blame] | 36 | struct pt_regs; |
| 37 | struct kprobe; |
| 38 | |
| 39 | typedef u16 kprobe_opcode_t; |
| 40 | #define BREAKPOINT_INSTRUCTION 0x0002 |
| 41 | |
| 42 | /* Maximum instruction size is 3 (16bit) halfwords: */ |
| 43 | #define MAX_INSN_SIZE 0x0003 |
| 44 | #define MAX_STACK_SIZE 64 |
| 45 | #define MIN_STACK_SIZE(ADDR) (((MAX_STACK_SIZE) < \ |
| 46 | (((unsigned long)current_thread_info()) + THREAD_SIZE - (ADDR))) \ |
| 47 | ? (MAX_STACK_SIZE) \ |
| 48 | : (((unsigned long)current_thread_info()) + THREAD_SIZE - (ADDR))) |
| 49 | |
Masami Hiramatsu | f438d91 | 2007-10-16 01:27:49 -0700 | [diff] [blame] | 50 | #define kretprobe_blacklist_size 0 |
Michael Grundy | 4ba069b | 2006-09-20 15:58:39 +0200 | [diff] [blame] | 51 | |
| 52 | #define KPROBE_SWAP_INST 0x10 |
| 53 | |
| 54 | #define FIXUP_PSW_NORMAL 0x08 |
| 55 | #define FIXUP_BRANCH_NOT_TAKEN 0x04 |
| 56 | #define FIXUP_RETURN_REGISTER 0x02 |
| 57 | #define FIXUP_NOT_REQUIRED 0x01 |
| 58 | |
| 59 | /* Architecture specific copy of original instruction */ |
| 60 | struct arch_specific_insn { |
| 61 | /* copy of original instruction */ |
Heiko Carstens | 63c4043 | 2013-09-11 14:24:14 -0700 | [diff] [blame] | 62 | kprobe_opcode_t *insn; |
Heiko Carstens | c933146 | 2014-10-15 12:17:38 +0200 | [diff] [blame^] | 63 | unsigned int is_ftrace_insn : 1; |
Michael Grundy | 4ba069b | 2006-09-20 15:58:39 +0200 | [diff] [blame] | 64 | }; |
| 65 | |
Michael Grundy | 4ba069b | 2006-09-20 15:58:39 +0200 | [diff] [blame] | 66 | struct prev_kprobe { |
| 67 | struct kprobe *kp; |
| 68 | unsigned long status; |
Michael Grundy | 4ba069b | 2006-09-20 15:58:39 +0200 | [diff] [blame] | 69 | }; |
| 70 | |
| 71 | /* per-cpu kprobe control block */ |
| 72 | struct kprobe_ctlblk { |
| 73 | unsigned long kprobe_status; |
| 74 | unsigned long kprobe_saved_imask; |
| 75 | unsigned long kprobe_saved_ctl[3]; |
Michael Grundy | 4ba069b | 2006-09-20 15:58:39 +0200 | [diff] [blame] | 76 | struct prev_kprobe prev_kprobe; |
Martin Schwidefsky | 92b8cbf | 2011-01-05 12:47:22 +0100 | [diff] [blame] | 77 | struct pt_regs jprobe_saved_regs; |
Michael Grundy | 4ba069b | 2006-09-20 15:58:39 +0200 | [diff] [blame] | 78 | kprobe_opcode_t jprobes_stack[MAX_STACK_SIZE]; |
| 79 | }; |
| 80 | |
| 81 | void arch_remove_kprobe(struct kprobe *p); |
| 82 | void kretprobe_trampoline(void); |
Michael Grundy | 4ba069b | 2006-09-20 15:58:39 +0200 | [diff] [blame] | 83 | |
Christoph Hellwig | 33464e3 | 2007-05-04 18:47:46 +0200 | [diff] [blame] | 84 | int kprobe_fault_handler(struct pt_regs *regs, int trapnr); |
| 85 | int kprobe_exceptions_notify(struct notifier_block *self, |
| 86 | unsigned long val, void *data); |
| 87 | |
Jan Willeke | 975fab1 | 2014-09-22 16:37:27 +0200 | [diff] [blame] | 88 | int probe_is_prohibited_opcode(u16 *insn); |
| 89 | int probe_get_fixup_type(u16 *insn); |
| 90 | int probe_is_insn_relative_long(u16 *insn); |
| 91 | |
Michael Grundy | 4ba069b | 2006-09-20 15:58:39 +0200 | [diff] [blame] | 92 | #define flush_insn_slot(p) do { } while (0) |
| 93 | |
| 94 | #endif /* _ASM_S390_KPROBES_H */ |