2 * arch/arm/include/asm/ptrace.h
4 * Copyright (C) 1996-2003 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_ARM_PTRACE_H
11 #define __ASM_ARM_PTRACE_H
13 #include <asm/hwcap.h>
15 #define PTRACE_GETREGS 12
16 #define PTRACE_SETREGS 13
17 #define PTRACE_GETFPREGS 14
18 #define PTRACE_SETFPREGS 15
19 /* PTRACE_ATTACH is 16 */
20 /* PTRACE_DETACH is 17 */
21 #define PTRACE_GETWMMXREGS 18
22 #define PTRACE_SETWMMXREGS 19
24 #define PTRACE_OLDSETOPTIONS 21
25 #define PTRACE_GET_THREAD_AREA 22
26 #define PTRACE_SET_SYSCALL 23
27 /* PTRACE_SYSCALL is 24 */
28 #define PTRACE_GETCRUNCHREGS 25
29 #define PTRACE_SETCRUNCHREGS 26
30 #define PTRACE_GETVFPREGS 27
31 #define PTRACE_SETVFPREGS 28
36 #define USR26_MODE 0x00000000
37 #define FIQ26_MODE 0x00000001
38 #define IRQ26_MODE 0x00000002
39 #define SVC26_MODE 0x00000003
40 #define USR_MODE 0x00000010
41 #define FIQ_MODE 0x00000011
42 #define IRQ_MODE 0x00000012
43 #define SVC_MODE 0x00000013
44 #define ABT_MODE 0x00000017
45 #define UND_MODE 0x0000001b
46 #define SYSTEM_MODE 0x0000001f
47 #define MODE32_BIT 0x00000010
48 #define MODE_MASK 0x0000001f
49 #define PSR_T_BIT 0x00000020
50 #define PSR_F_BIT 0x00000040
51 #define PSR_I_BIT 0x00000080
52 #define PSR_A_BIT 0x00000100
53 #define PSR_J_BIT 0x01000000
54 #define PSR_Q_BIT 0x08000000
55 #define PSR_V_BIT 0x10000000
56 #define PSR_C_BIT 0x20000000
57 #define PSR_Z_BIT 0x40000000
58 #define PSR_N_BIT 0x80000000
63 #define PSR_f 0xff000000 /* Flags */
64 #define PSR_s 0x00ff0000 /* Status */
65 #define PSR_x 0x0000ff00 /* Extension */
66 #define PSR_c 0x000000ff /* Control */
71 * This struct defines the way the registers are stored on the
72 * stack during a system call. Note that sizeof(struct pt_regs)
73 * has to be a multiple of 8.
79 #define ARM_cpsr uregs[16]
80 #define ARM_pc uregs[15]
81 #define ARM_lr uregs[14]
82 #define ARM_sp uregs[13]
83 #define ARM_ip uregs[12]
84 #define ARM_fp uregs[11]
85 #define ARM_r10 uregs[10]
86 #define ARM_r9 uregs[9]
87 #define ARM_r8 uregs[8]
88 #define ARM_r7 uregs[7]
89 #define ARM_r6 uregs[6]
90 #define ARM_r5 uregs[5]
91 #define ARM_r4 uregs[4]
92 #define ARM_r3 uregs[3]
93 #define ARM_r2 uregs[2]
94 #define ARM_r1 uregs[1]
95 #define ARM_r0 uregs[0]
96 #define ARM_ORIG_r0 uregs[17]
100 #define user_mode(regs) \
101 (((regs)->ARM_cpsr & 0xf) == 0)
103 #ifdef CONFIG_ARM_THUMB
104 #define thumb_mode(regs) \
105 (((regs)->ARM_cpsr & PSR_T_BIT))
107 #define thumb_mode(regs) (0)
110 #define isa_mode(regs) \
111 ((((regs)->ARM_cpsr & PSR_J_BIT) >> 23) | \
112 (((regs)->ARM_cpsr & PSR_T_BIT) >> 5))
114 #define processor_mode(regs) \
115 ((regs)->ARM_cpsr & MODE_MASK)
117 #define interrupts_enabled(regs) \
118 (!((regs)->ARM_cpsr & PSR_I_BIT))
120 #define fast_interrupts_enabled(regs) \
121 (!((regs)->ARM_cpsr & PSR_F_BIT))
123 /* Are the current registers suitable for user mode?
124 * (used to maintain security in signal handlers)
126 static inline int valid_user_regs(struct pt_regs *regs)
128 if (user_mode(regs) && (regs->ARM_cpsr & PSR_I_BIT) == 0) {
129 regs->ARM_cpsr &= ~(PSR_F_BIT | PSR_A_BIT);
134 * Force CPSR to something logical...
136 regs->ARM_cpsr &= PSR_f | PSR_s | (PSR_x & ~PSR_A_BIT) | PSR_T_BIT | MODE32_BIT;
137 if (!(elf_hwcap & HWCAP_26BIT))
138 regs->ARM_cpsr |= USR_MODE;
143 #define instruction_pointer(regs) (regs)->ARM_pc
146 extern unsigned long profile_pc(struct pt_regs *regs);
148 #define profile_pc(regs) instruction_pointer(regs)
151 #define predicate(x) ((x) & 0xf0000000)
152 #define PREDICATE_ALWAYS 0xe0000000
154 #endif /* __KERNEL__ */
156 #endif /* __ASSEMBLY__ */