tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 1994, 95, 96, 97, 98, 99, 2000 by Ralf Baechle
7 * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
8 */
9#ifndef _ASM_PTRACE_H
10#define _ASM_PTRACE_H
11
12
13#include <linux/compiler.h>
14#include <linux/linkage.h>
15#include <linux/types.h>
16#include <asm/isadep.h>
17#include <uapi/asm/ptrace.h>
18
19struct task_struct;
20
21extern int ptrace_getregs(struct task_struct *child, __s64 __user *data);
22extern int ptrace_setregs(struct task_struct *child, __s64 __user *data);
23
24extern int ptrace_getfpregs(struct task_struct *child, __u32 __user *data);
25extern int ptrace_setfpregs(struct task_struct *child, __u32 __user *data);
26
27extern int ptrace_get_watch_regs(struct task_struct *child,
28 struct pt_watch_regs __user *addr);
29extern int ptrace_set_watch_regs(struct task_struct *child,
30 struct pt_watch_regs __user *addr);
31
32/*
33 * Does the process account for user or for system time?
34 */
35#define user_mode(regs) (((regs)->cp0_status & KU_MASK) == KU_USER)
36
37static inline int is_syscall_success(struct pt_regs *regs)
38{
39 return !regs->regs[7];
40}
41
42static inline long regs_return_value(struct pt_regs *regs)
43{
44 if (is_syscall_success(regs))
45 return regs->regs[2];
46 else
47 return -regs->regs[2];
48}
49
50#define instruction_pointer(regs) ((regs)->cp0_epc)
51#define profile_pc(regs) instruction_pointer(regs)
52#define user_stack_pointer(r) ((r)->regs[29])
53
54extern asmlinkage void syscall_trace_enter(struct pt_regs *regs);
55extern asmlinkage void syscall_trace_leave(struct pt_regs *regs);
56
57extern void die(const char *, struct pt_regs *) __noreturn;
58
59static inline void die_if_kernel(const char *str, struct pt_regs *regs)
60{
61 if (unlikely(!user_mode(regs)))
62 die(str, regs);
63}
64
65#define current_pt_regs() \
66({ \
67 unsigned long sp = (unsigned long)__builtin_frame_address(0); \
68 (struct pt_regs *)((sp | (THREAD_SIZE - 1)) + 1 - 32) - 1; \
69})
70
71#endif /* _ASM_PTRACE_H */