2 * linux/include/asm-arm/proc-armv/ptrace.h
4 * Copyright (C) 1996-1999 Russell King
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
10 #ifndef __ASM_PROC_PTRACE_H
11 #define __ASM_PROC_PTRACE_H
13 #define USR26_MODE 0x00
14 #define FIQ26_MODE 0x01
15 #define IRQ26_MODE 0x02
16 #define SVC26_MODE 0x03
23 #define SYSTEM_MODE 0x1f
24 #define MODE_MASK 0x1f
28 #define CC_V_BIT (1 << 28)
29 #define CC_C_BIT (1 << 29)
30 #define CC_Z_BIT (1 << 30)
31 #define CC_N_BIT (1 << 31)
36 /* this struct defines the way the registers are stored on the
37 stack during a system call. */
43 #define ARM_cpsr uregs[16]
44 #define ARM_pc uregs[15]
45 #define ARM_lr uregs[14]
46 #define ARM_sp uregs[13]
47 #define ARM_ip uregs[12]
48 #define ARM_fp uregs[11]
49 #define ARM_r10 uregs[10]
50 #define ARM_r9 uregs[9]
51 #define ARM_r8 uregs[8]
52 #define ARM_r7 uregs[7]
53 #define ARM_r6 uregs[6]
54 #define ARM_r5 uregs[5]
55 #define ARM_r4 uregs[4]
56 #define ARM_r3 uregs[3]
57 #define ARM_r2 uregs[2]
58 #define ARM_r1 uregs[1]
59 #define ARM_r0 uregs[0]
60 #define ARM_ORIG_r0 uregs[17]
64 #define user_mode(regs) \
65 (((regs)->ARM_cpsr & 0xf) == 0)
67 #ifdef CONFIG_ARM_THUMB
68 #define thumb_mode(regs) \
69 (((regs)->ARM_cpsr & T_BIT))
71 #define thumb_mode(regs) (0)
74 #define processor_mode(regs) \
75 ((regs)->ARM_cpsr & MODE_MASK)
77 #define interrupts_enabled(regs) \
78 (!((regs)->ARM_cpsr & I_BIT))
80 #define fast_interrupts_enabled(regs) \
81 (!((regs)->ARM_cpsr & F_BIT))
83 #define condition_codes(regs) \
84 ((regs)->ARM_cpsr & (CC_V_BIT|CC_C_BIT|CC_Z_BIT|CC_N_BIT))
86 /* Are the current registers suitable for user mode?
87 * (used to maintain security in signal handlers)
89 static inline int valid_user_regs(struct pt_regs *regs)
91 if ((regs->ARM_cpsr & 0xf) == 0 &&
92 (regs->ARM_cpsr & (F_BIT|I_BIT)) == 0)
96 * Force CPSR to something logical...
98 regs->ARM_cpsr &= (CC_V_BIT|CC_C_BIT|CC_Z_BIT|CC_N_BIT|0x10);
103 #endif /* __KERNEL__ */
105 #endif /* __ASSEMBLY__ */