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
20 * This struct defines the way the registers are stored
21 * on the stack during an exception.
25 unsigned long regs[31];
28 #endif /* __ASSEMBLY__ */
30 #else /* CONFIG_ARM64 */
32 #define USR26_MODE 0x00
33 #define FIQ26_MODE 0x01
34 #define IRQ26_MODE 0x02
35 #define SVC26_MODE 0x03
44 #define SYSTEM_MODE 0x1f
45 #define MODE_MASK 0x1f
50 #define CC_V_BIT (1 << 28)
51 #define CC_C_BIT (1 << 29)
52 #define CC_Z_BIT (1 << 30)
53 #define CC_N_BIT (1 << 31)
58 /* this struct defines the way the registers are stored on the
59 stack during a system call. */
65 #define ARM_cpsr uregs[16]
66 #define ARM_pc uregs[15]
67 #define ARM_lr uregs[14]
68 #define ARM_sp uregs[13]
69 #define ARM_ip uregs[12]
70 #define ARM_fp uregs[11]
71 #define ARM_r10 uregs[10]
72 #define ARM_r9 uregs[9]
73 #define ARM_r8 uregs[8]
74 #define ARM_r7 uregs[7]
75 #define ARM_r6 uregs[6]
76 #define ARM_r5 uregs[5]
77 #define ARM_r4 uregs[4]
78 #define ARM_r3 uregs[3]
79 #define ARM_r2 uregs[2]
80 #define ARM_r1 uregs[1]
81 #define ARM_r0 uregs[0]
82 #define ARM_ORIG_r0 uregs[17]
86 #define user_mode(regs) \
87 (((regs)->ARM_cpsr & 0xf) == 0)
89 #if CONFIG_IS_ENABLED(SYS_THUMB_BUILD)
90 #define thumb_mode(regs) \
91 (((regs)->ARM_cpsr & T_BIT))
93 #define thumb_mode(regs) (0)
96 #define processor_mode(regs) \
97 ((regs)->ARM_cpsr & MODE_MASK)
99 #define interrupts_enabled(regs) \
100 (!((regs)->ARM_cpsr & I_BIT))
102 #define fast_interrupts_enabled(regs) \
103 (!((regs)->ARM_cpsr & F_BIT))
105 #define condition_codes(regs) \
106 ((regs)->ARM_cpsr & (CC_V_BIT|CC_C_BIT|CC_Z_BIT|CC_N_BIT))
108 /* Are the current registers suitable for user mode?
109 * (used to maintain security in signal handlers)
111 static inline int valid_user_regs(struct pt_regs *regs)
113 if ((regs->ARM_cpsr & 0xf) == 0 &&
114 (regs->ARM_cpsr & (F_BIT|I_BIT)) == 0)
118 * Force CPSR to something logical...
120 regs->ARM_cpsr &= (CC_V_BIT|CC_C_BIT|CC_Z_BIT|CC_N_BIT|0x10);
125 #endif /* __KERNEL__ */
127 #endif /* __ASSEMBLY__ */
129 #endif /* CONFIG_ARM64 */