projects / thirdparty / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 0b73214f | 1 | /* SPDX-License-Identifier: GPL-2.0+ */ |
| 4ba069b8 MG |
2 | #ifndef _ASM_S390_KPROBES_H |
| 3 | #define _ASM_S390_KPROBES_H | |
| 4 | /* | |
| 5 | * Kernel Probes (KProbes) | |
| 6 | * | |
| a53c8fab | 7 | * Copyright IBM Corp. 2002, 2006 |
| 4ba069b8 MG |
8 | * |
| 9 | * 2002-Oct Created by Vamsi Krishna S <vamsi_krishna@in.ibm.com> Kernel | |
| 10 | * Probes initial implementation ( includes suggestions from | |
| 11 | * Rusty Russell). | |
| 12 | * 2004-Nov Modified for PPC64 by Ananth N Mavinakayanahalli | |
| 13 | * <ananth@in.ibm.com> | |
| 14 | * 2005-Dec Used as a template for s390 by Mike Grundy | |
| 15 | * <grundym@us.ibm.com> | |
| 16 | */ | |
| db55947d | 17 | #include <linux/types.h> |
| 527618ab | 18 | #include <asm/ctlreg.h> |
| 7d134b2c LR |
19 | #include <asm-generic/kprobes.h> |
| 20 | ||
| 21 | #define BREAKPOINT_INSTRUCTION 0x0002 | |
| 22 | ||
| db55947d HC |
23 | #define FIXUP_PSW_NORMAL 0x08 |
| 24 | #define FIXUP_BRANCH_NOT_TAKEN 0x04 | |
| 25 | #define FIXUP_RETURN_REGISTER 0x02 | |
| 26 | #define FIXUP_NOT_REQUIRED 0x01 | |
| 27 | ||
| 28 | int probe_is_prohibited_opcode(u16 *insn); | |
| 29 | int probe_get_fixup_type(u16 *insn); | |
| 30 | int probe_is_insn_relative_long(u16 *insn); | |
| 31 | ||
| 7d134b2c | 32 | #ifdef CONFIG_KPROBES |
| 4ba069b8 MG |
33 | #include <linux/ptrace.h> |
| 34 | #include <linux/percpu.h> | |
| 68db0cf1 | 35 | #include <linux/sched/task_stack.h> |
| 4ba069b8 | 36 | |
| 63c40436 HC |
37 | #define __ARCH_WANT_KPROBES_INSN_SLOT |
| 38 | ||
| 4ba069b8 MG |
39 | struct pt_regs; |
| 40 | struct kprobe; | |
| 41 | ||
| 42 | typedef u16 kprobe_opcode_t; | |
| 4ba069b8 MG |
43 | |
| 44 | /* Maximum instruction size is 3 (16bit) halfwords: */ | |
| 45 | #define MAX_INSN_SIZE 0x0003 | |
| 46 | #define MAX_STACK_SIZE 64 | |
| 47 | #define MIN_STACK_SIZE(ADDR) (((MAX_STACK_SIZE) < \ | |
| c3bdf2e1 | 48 | (((unsigned long)task_stack_page(current)) + THREAD_SIZE - (ADDR))) \ |
| 4ba069b8 | 49 | ? (MAX_STACK_SIZE) \ |
| c3bdf2e1 | 50 | : (((unsigned long)task_stack_page(current)) + THREAD_SIZE - (ADDR))) |
| 4ba069b8 | 51 | |
| f438d914 | 52 | #define kretprobe_blacklist_size 0 |
| 4ba069b8 | 53 | |
| 4ba069b8 MG |
54 | /* Architecture specific copy of original instruction */ |
| 55 | struct arch_specific_insn { | |
| 56 | /* copy of original instruction */ | |
| 63c40436 | 57 | kprobe_opcode_t *insn; |
| 4ba069b8 MG |
58 | }; |
| 59 | ||
| 4ba069b8 MG |
60 | struct prev_kprobe { |
| 61 | struct kprobe *kp; | |
| 62 | unsigned long status; | |
| 4ba069b8 MG |
63 | }; |
| 64 | ||
| 65 | /* per-cpu kprobe control block */ | |
| 66 | struct kprobe_ctlblk { | |
| 67 | unsigned long kprobe_status; | |
| 68 | unsigned long kprobe_saved_imask; | |
| 527618ab | 69 | struct ctlreg kprobe_saved_ctl[3]; |
| 4ba069b8 | 70 | struct prev_kprobe prev_kprobe; |
| 4ba069b8 MG |
71 | }; |
| 72 | ||
| 73 | void arch_remove_kprobe(struct kprobe *p); | |
| 4ba069b8 | 74 | |
| 33464e3b | 75 | int kprobe_fault_handler(struct pt_regs *regs, int trapnr); |
| 33464e3b | 76 | |
| 4ba069b8 MG |
77 | #define flush_insn_slot(p) do { } while (0) |
| 78 | ||
| 7d134b2c | 79 | #endif /* CONFIG_KPROBES */ |
| 4ba069b8 | 80 | #endif /* _ASM_S390_KPROBES_H */ |