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Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * linux/arch/unicore32/include/asm/ptrace.h
4 *
5 * Code specific to PKUnity SoC and UniCore ISA
6 *
7 * Copyright (C) 2001-2010 GUAN Xue-tao
8 */
9#ifndef __UNICORE_PTRACE_H__
10#define __UNICORE_PTRACE_H__
11
12#include <uapi/asm/ptrace.h>
13
14#ifndef __ASSEMBLY__
15
16#define user_mode(regs) \
17 (processor_mode(regs) == USER_MODE)
18
19#define processor_mode(regs) \
20 ((regs)->UCreg_asr & MODE_MASK)
21
22#define interrupts_enabled(regs) \
23 (!((regs)->UCreg_asr & PSR_I_BIT))
24
25#define fast_interrupts_enabled(regs) \
26 (!((regs)->UCreg_asr & PSR_R_BIT))
27
28/* Are the current registers suitable for user mode?
29 * (used to maintain security in signal handlers)
30 */
31static inline int valid_user_regs(struct pt_regs *regs)
32{
33 unsigned long mode = regs->UCreg_asr & MODE_MASK;
34
35 /*
36 * Always clear the R (REAL) bits
37 */
38 regs->UCreg_asr &= ~(PSR_R_BIT);
39
40 if ((regs->UCreg_asr & PSR_I_BIT) == 0) {
41 if (mode == USER_MODE)
42 return 1;
43 }
44
45 /*
46 * Force ASR to something logical...
47 */
48 regs->UCreg_asr &= PSR_f | USER_MODE;
49
50 return 0;
51}
52
53#define instruction_pointer(regs) ((regs)->UCreg_pc)
54#define user_stack_pointer(regs) ((regs)->UCreg_sp)
55#define profile_pc(regs) instruction_pointer(regs)
56
57#endif /* __ASSEMBLY__ */
58#endif