2 * Based on arch/arm/include/asm/ptrace.h
4 * Copyright (C) 1996-2003 Russell King
5 * Copyright (C) 2012 ARM Ltd.
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
19 #ifndef __ASM_PTRACE_H
20 #define __ASM_PTRACE_H
22 #include <uapi/asm/ptrace.h>
24 #define _PSR_PAN_BIT 22
26 /* Current Exception Level values, as contained in CurrentEL */
27 #define CurrentEL_EL1 (1 << 2)
28 #define CurrentEL_EL2 (2 << 2)
30 /* AArch32-specific ptrace requests */
31 #define COMPAT_PTRACE_GETREGS 12
32 #define COMPAT_PTRACE_SETREGS 13
33 #define COMPAT_PTRACE_GET_THREAD_AREA 22
34 #define COMPAT_PTRACE_SET_SYSCALL 23
35 #define COMPAT_PTRACE_GETVFPREGS 27
36 #define COMPAT_PTRACE_SETVFPREGS 28
37 #define COMPAT_PTRACE_GETHBPREGS 29
38 #define COMPAT_PTRACE_SETHBPREGS 30
40 /* AArch32 CPSR bits */
41 #define COMPAT_PSR_MODE_MASK 0x0000001f
42 #define COMPAT_PSR_MODE_USR 0x00000010
43 #define COMPAT_PSR_MODE_FIQ 0x00000011
44 #define COMPAT_PSR_MODE_IRQ 0x00000012
45 #define COMPAT_PSR_MODE_SVC 0x00000013
46 #define COMPAT_PSR_MODE_ABT 0x00000017
47 #define COMPAT_PSR_MODE_HYP 0x0000001a
48 #define COMPAT_PSR_MODE_UND 0x0000001b
49 #define COMPAT_PSR_MODE_SYS 0x0000001f
50 #define COMPAT_PSR_T_BIT 0x00000020
51 #define COMPAT_PSR_E_BIT 0x00000200
52 #define COMPAT_PSR_F_BIT 0x00000040
53 #define COMPAT_PSR_I_BIT 0x00000080
54 #define COMPAT_PSR_A_BIT 0x00000100
55 #define COMPAT_PSR_E_BIT 0x00000200
56 #define COMPAT_PSR_J_BIT 0x01000000
57 #define COMPAT_PSR_Q_BIT 0x08000000
58 #define COMPAT_PSR_V_BIT 0x10000000
59 #define COMPAT_PSR_C_BIT 0x20000000
60 #define COMPAT_PSR_Z_BIT 0x40000000
61 #define COMPAT_PSR_N_BIT 0x80000000
62 #define COMPAT_PSR_IT_MASK 0x0600fc00 /* If-Then execution state mask */
63 #define COMPAT_PSR_GE_MASK 0x000f0000
65 #ifdef CONFIG_CPU_BIG_ENDIAN
66 #define COMPAT_PSR_ENDSTATE COMPAT_PSR_E_BIT
68 #define COMPAT_PSR_ENDSTATE 0
72 * These are 'magic' values for PTRACE_PEEKUSR that return info about where a
73 * process is located in memory.
75 #define COMPAT_PT_TEXT_ADDR 0x10000
76 #define COMPAT_PT_DATA_ADDR 0x10004
77 #define COMPAT_PT_TEXT_END_ADDR 0x10008
80 /* sizeof(struct user) for AArch32 */
81 #define COMPAT_USER_SZ 296
83 /* Architecturally defined mapping between AArch32 and AArch64 registers */
84 #define compat_usr(x) regs[(x)]
85 #define compat_fp regs[11]
86 #define compat_sp regs[13]
87 #define compat_lr regs[14]
88 #define compat_sp_hyp regs[15]
89 #define compat_lr_irq regs[16]
90 #define compat_sp_irq regs[17]
91 #define compat_lr_svc regs[18]
92 #define compat_sp_svc regs[19]
93 #define compat_lr_abt regs[20]
94 #define compat_sp_abt regs[21]
95 #define compat_lr_und regs[22]
96 #define compat_sp_und regs[23]
97 #define compat_r8_fiq regs[24]
98 #define compat_r9_fiq regs[25]
99 #define compat_r10_fiq regs[26]
100 #define compat_r11_fiq regs[27]
101 #define compat_r12_fiq regs[28]
102 #define compat_sp_fiq regs[29]
103 #define compat_lr_fiq regs[30]
106 * This struct defines the way the registers are stored on the stack during an
107 * exception. Note that sizeof(struct pt_regs) has to be a multiple of 16 (for
108 * stack alignment). struct user_pt_regs must form a prefix of struct pt_regs.
112 struct user_pt_regs user_regs;
123 u64 unused; // maintain 16 byte alignment
126 #define MAX_REG_OFFSET offsetof(struct pt_regs, pstate)
128 #define arch_has_single_step() (1)
131 #define compat_thumb_mode(regs) \
132 (((regs)->pstate & COMPAT_PSR_T_BIT))
134 #define compat_thumb_mode(regs) (0)
137 #define user_mode(regs) \
138 (((regs)->pstate & PSR_MODE_MASK) == PSR_MODE_EL0t)
140 #define compat_user_mode(regs) \
141 (((regs)->pstate & (PSR_MODE32_BIT | PSR_MODE_MASK)) == \
142 (PSR_MODE32_BIT | PSR_MODE_EL0t))
144 #define processor_mode(regs) \
145 ((regs)->pstate & PSR_MODE_MASK)
147 #define interrupts_enabled(regs) \
148 (!((regs)->pstate & PSR_I_BIT))
150 #define fast_interrupts_enabled(regs) \
151 (!((regs)->pstate & PSR_F_BIT))
153 #define GET_USP(regs) \
154 (!compat_user_mode(regs) ? (regs)->sp : (regs)->compat_sp)
156 #define SET_USP(ptregs, value) \
157 (!compat_user_mode(regs) ? ((regs)->sp = value) : ((regs)->compat_sp = value))
159 extern int regs_query_register_offset(const char *name);
160 extern const char *regs_query_register_name(unsigned int offset);
161 extern unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs,
165 * regs_get_register() - get register value from its offset
166 * @regs: pt_regs from which register value is gotten
167 * @offset: offset of the register.
169 * regs_get_register returns the value of a register whose offset from @regs.
170 * The @offset is the offset of the register in struct pt_regs.
171 * If @offset is bigger than MAX_REG_OFFSET, this returns 0.
173 static inline u64 regs_get_register(struct pt_regs *regs, unsigned int offset)
180 val = regs->regs[offset];
182 case offsetof(struct pt_regs, sp) >> 3:
185 case offsetof(struct pt_regs, pc) >> 3:
188 case offsetof(struct pt_regs, pstate) >> 3:
198 /* Valid only for Kernel mode traps. */
199 static inline unsigned long kernel_stack_pointer(struct pt_regs *regs)
204 static inline unsigned long regs_return_value(struct pt_regs *regs)
206 return regs->regs[0];
209 /* We must avoid circular header include via sched.h */
211 int valid_user_regs(struct user_pt_regs *regs, struct task_struct *task);
213 #define GET_IP(regs) ((unsigned long)(regs)->pc)
214 #define SET_IP(regs, value) ((regs)->pc = ((u64) (value)))
216 #define GET_FP(ptregs) ((unsigned long)(ptregs)->regs[29])
217 #define SET_FP(ptregs, value) ((ptregs)->regs[29] = ((u64) (value)))
219 #include <asm-generic/ptrace.h>
222 extern unsigned long profile_pc(struct pt_regs *regs);
224 #endif /* __ASSEMBLY__ */