tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * linux/arch/unicore32/include/asm/ptrace.h
3 *
4 * Code specific to PKUnity SoC and UniCore ISA
5 *
6 * Copyright (C) 2001-2010 GUAN Xue-tao
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12#ifndef __UNICORE_PTRACE_H__
13#define __UNICORE_PTRACE_H__
14
15#include <uapi/asm/ptrace.h>
16
17#ifndef __ASSEMBLY__
18
19#define user_mode(regs) \
20 (processor_mode(regs) == USER_MODE)
21
22#define processor_mode(regs) \
23 ((regs)->UCreg_asr & MODE_MASK)
24
25#define interrupts_enabled(regs) \
26 (!((regs)->UCreg_asr & PSR_I_BIT))
27
28#define fast_interrupts_enabled(regs) \
29 (!((regs)->UCreg_asr & PSR_R_BIT))
30
31/* Are the current registers suitable for user mode?
32 * (used to maintain security in signal handlers)
33 */
34static inline int valid_user_regs(struct pt_regs *regs)
35{
36 unsigned long mode = regs->UCreg_asr & MODE_MASK;
37
38 /*
39 * Always clear the R (REAL) bits
40 */
41 regs->UCreg_asr &= ~(PSR_R_BIT);
42
43 if ((regs->UCreg_asr & PSR_I_BIT) == 0) {
44 if (mode == USER_MODE)
45 return 1;
46 }
47
48 /*
49 * Force ASR to something logical...
50 */
51 regs->UCreg_asr &= PSR_f | USER_MODE;
52
53 return 0;
54}
55
56#define instruction_pointer(regs) ((regs)->UCreg_pc)
57#define user_stack_pointer(regs) ((regs)->UCreg_sp)
58#define profile_pc(regs) instruction_pointer(regs)
59
60#endif /* __ASSEMBLY__ */
61#endif