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 #include <linux/config.h>
15 #define USR26_MODE 0x00
16 #define FIQ26_MODE 0x01
17 #define IRQ26_MODE 0x02
18 #define SVC26_MODE 0x03
25 #define SYSTEM_MODE 0x1f
26 #define MODE_MASK 0x1f
30 #define CC_V_BIT (1 << 28)
31 #define CC_C_BIT (1 << 29)
32 #define CC_Z_BIT (1 << 30)
33 #define CC_N_BIT (1 << 31)
38 /* this struct defines the way the registers are stored on the
39 stack during a system call. */
45 #define ARM_cpsr uregs[16]
46 #define ARM_pc uregs[15]
47 #define ARM_lr uregs[14]
48 #define ARM_sp uregs[13]
49 #define ARM_ip uregs[12]
50 #define ARM_fp uregs[11]
51 #define ARM_r10 uregs[10]
52 #define ARM_r9 uregs[9]
53 #define ARM_r8 uregs[8]
54 #define ARM_r7 uregs[7]
55 #define ARM_r6 uregs[6]
56 #define ARM_r5 uregs[5]
57 #define ARM_r4 uregs[4]
58 #define ARM_r3 uregs[3]
59 #define ARM_r2 uregs[2]
60 #define ARM_r1 uregs[1]
61 #define ARM_r0 uregs[0]
62 #define ARM_ORIG_r0 uregs[17]
64 #define instruction_pointer(regs) ((regs)->ARM_ip)
68 #define user_mode(regs) \
69 (((regs)->ARM_cpsr & 0xf) == 0)
71 #ifdef CONFIG_ARM_THUMB
72 #define thumb_mode(regs) \
73 (((regs)->ARM_cpsr & T_BIT))
75 #define thumb_mode(regs) (0)
78 #define processor_mode(regs) \
79 ((regs)->ARM_cpsr & MODE_MASK)
81 #define interrupts_enabled(regs) \
82 (!((regs)->ARM_cpsr & I_BIT))
84 #define fast_interrupts_enabled(regs) \
85 (!((regs)->ARM_cpsr & F_BIT))
87 #define condition_codes(regs) \
88 ((regs)->ARM_cpsr & (CC_V_BIT|CC_C_BIT|CC_Z_BIT|CC_N_BIT))
90 /* Are the current registers suitable for user mode?
91 * (used to maintain security in signal handlers)
93 static inline int valid_user_regs(struct pt_regs *regs)
95 if ((regs->ARM_cpsr & 0xf) == 0 &&
96 (regs->ARM_cpsr & (F_BIT|I_BIT)) == 0)
100 * Force CPSR to something logical...
102 regs->ARM_cpsr &= (CC_V_BIT|CC_C_BIT|CC_Z_BIT|CC_N_BIT|0x10);
107 #endif /* __KERNEL__ */
109 #endif /* __ASSEMBLY__ */