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_E_BIT 0x00000200
54 #define PSR_J_BIT 0x01000000
55 #define PSR_Q_BIT 0x08000000
56 #define PSR_V_BIT 0x10000000
57 #define PSR_C_BIT 0x20000000
58 #define PSR_Z_BIT 0x40000000
59 #define PSR_N_BIT 0x80000000
64 #define PSR_f 0xff000000 /* Flags */
65 #define PSR_s 0x00ff0000 /* Status */
66 #define PSR_x 0x0000ff00 /* Extension */
67 #define PSR_c 0x000000ff /* Control */
70 * ARMv7 groups of APSR bits
72 #define PSR_ISET_MASK 0x01000010 /* ISA state (J, T) mask */
73 #define PSR_IT_MASK 0x0600fc00 /* If-Then execution state mask */
74 #define PSR_ENDIAN_MASK 0x00000200 /* Endianness state mask */
77 * Default endianness state
79 #ifdef CONFIG_CPU_ENDIAN_BE8
80 #define PSR_ENDSTATE PSR_E_BIT
82 #define PSR_ENDSTATE 0
86 * These are 'magic' values for PTRACE_PEEKUSR that return info about where a
87 * process is located in memory.
89 #define PT_TEXT_ADDR 0x10000
90 #define PT_DATA_ADDR 0x10004
91 #define PT_TEXT_END_ADDR 0x10008
96 * This struct defines the way the registers are stored on the
97 * stack during a system call. Note that sizeof(struct pt_regs)
98 * has to be a multiple of 8.
104 #else /* __KERNEL__ */
106 unsigned long uregs[18];
108 #endif /* __KERNEL__ */
110 #define ARM_cpsr uregs[16]
111 #define ARM_pc uregs[15]
112 #define ARM_lr uregs[14]
113 #define ARM_sp uregs[13]
114 #define ARM_ip uregs[12]
115 #define ARM_fp uregs[11]
116 #define ARM_r10 uregs[10]
117 #define ARM_r9 uregs[9]
118 #define ARM_r8 uregs[8]
119 #define ARM_r7 uregs[7]
120 #define ARM_r6 uregs[6]
121 #define ARM_r5 uregs[5]
122 #define ARM_r4 uregs[4]
123 #define ARM_r3 uregs[3]
124 #define ARM_r2 uregs[2]
125 #define ARM_r1 uregs[1]
126 #define ARM_r0 uregs[0]
127 #define ARM_ORIG_r0 uregs[17]
131 #define arch_has_single_step() (1)
133 #define user_mode(regs) \
134 (((regs)->ARM_cpsr & 0xf) == 0)
136 #ifdef CONFIG_ARM_THUMB
137 #define thumb_mode(regs) \
138 (((regs)->ARM_cpsr & PSR_T_BIT))
140 #define thumb_mode(regs) (0)
143 #define isa_mode(regs) \
144 ((((regs)->ARM_cpsr & PSR_J_BIT) >> 23) | \
145 (((regs)->ARM_cpsr & PSR_T_BIT) >> 5))
147 #define processor_mode(regs) \
148 ((regs)->ARM_cpsr & MODE_MASK)
150 #define interrupts_enabled(regs) \
151 (!((regs)->ARM_cpsr & PSR_I_BIT))
153 #define fast_interrupts_enabled(regs) \
154 (!((regs)->ARM_cpsr & PSR_F_BIT))
156 /* Are the current registers suitable for user mode?
157 * (used to maintain security in signal handlers)
159 static inline int valid_user_regs(struct pt_regs *regs)
161 if (user_mode(regs) && (regs->ARM_cpsr & PSR_I_BIT) == 0) {
162 regs->ARM_cpsr &= ~(PSR_F_BIT | PSR_A_BIT);
167 * Force CPSR to something logical...
169 regs->ARM_cpsr &= PSR_f | PSR_s | (PSR_x & ~PSR_A_BIT) | PSR_T_BIT | MODE32_BIT;
170 if (!(elf_hwcap & HWCAP_26BIT))
171 regs->ARM_cpsr |= USR_MODE;
176 #define instruction_pointer(regs) (regs)->ARM_pc
179 extern unsigned long profile_pc(struct pt_regs *regs);
181 #define profile_pc(regs) instruction_pointer(regs)
184 #define predicate(x) ((x) & 0xf0000000)
185 #define PREDICATE_ALWAYS 0xe0000000
188 * kprobe-based event tracer support
190 #include <linux/stddef.h>
191 #include <linux/types.h>
192 #define MAX_REG_OFFSET (offsetof(struct pt_regs, ARM_ORIG_r0))
194 extern int regs_query_register_offset(const char *name);
195 extern const char *regs_query_register_name(unsigned int offset);
196 extern bool regs_within_kernel_stack(struct pt_regs *regs, unsigned long addr);
197 extern unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs,
201 * regs_get_register() - get register value from its offset
202 * @regs: pt_regs from which register value is gotten
203 * @offset: offset number of the register.
205 * regs_get_register returns the value of a register whose offset from @regs.
206 * The @offset is the offset of the register in struct pt_regs.
207 * If @offset is bigger than MAX_REG_OFFSET, this returns 0.
209 static inline unsigned long regs_get_register(struct pt_regs *regs,
212 if (unlikely(offset > MAX_REG_OFFSET))
214 return *(unsigned long *)((unsigned long)regs + offset);
217 /* Valid only for Kernel mode traps. */
218 static inline unsigned long kernel_stack_pointer(struct pt_regs *regs)
223 #endif /* __KERNEL__ */
225 #endif /* __ASSEMBLY__ */