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1 | /* |
2 | * Based on arch/arm/include/asm/ptrace.h | |
3 | * | |
4 | * Copyright (C) 1996-2003 Russell King | |
5 | * Copyright (C) 2012 ARM Ltd. | |
6 | * | |
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. | |
10 | * | |
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. | |
15 | * | |
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/>. | |
18 | */ | |
19 | #ifndef __ASM_PTRACE_H | |
20 | #define __ASM_PTRACE_H | |
21 | ||
22 | #include <linux/types.h> | |
23 | ||
24 | #include <asm/hwcap.h> | |
25 | ||
26 | #define PTRACE_GETREGS 12 | |
27 | #define PTRACE_SETREGS 13 | |
28 | #define PTRACE_GETFPSIMDREGS 14 | |
29 | #define PTRACE_SETFPSIMDREGS 15 | |
30 | /* PTRACE_ATTACH is 16 */ | |
31 | /* PTRACE_DETACH is 17 */ | |
32 | #define PTRACE_GET_THREAD_AREA 22 | |
33 | #define PTRACE_SET_SYSCALL 23 | |
34 | #define PTRACE_GETHBPREGS 29 | |
35 | #define PTRACE_SETHBPREGS 30 | |
36 | ||
37 | /* AArch32-specific ptrace requests */ | |
38 | #define COMPAT_PTRACE_GETVFPREGS 27 | |
39 | #define COMPAT_PTRACE_SETVFPREGS 28 | |
40 | ||
41 | /* | |
42 | * PSR bits | |
43 | */ | |
44 | #define PSR_MODE_EL0t 0x00000000 | |
45 | #define PSR_MODE_EL1t 0x00000004 | |
46 | #define PSR_MODE_EL1h 0x00000005 | |
47 | #define PSR_MODE_EL2t 0x00000008 | |
48 | #define PSR_MODE_EL2h 0x00000009 | |
49 | #define PSR_MODE_EL3t 0x0000000c | |
50 | #define PSR_MODE_EL3h 0x0000000d | |
51 | #define PSR_MODE_MASK 0x0000000f | |
52 | ||
53 | /* AArch32 CPSR bits */ | |
54 | #define PSR_MODE32_BIT 0x00000010 | |
55 | #define COMPAT_PSR_MODE_USR 0x00000010 | |
56 | #define COMPAT_PSR_T_BIT 0x00000020 | |
57 | #define COMPAT_PSR_IT_MASK 0x0600fc00 /* If-Then execution state mask */ | |
58 | ||
59 | /* AArch64 SPSR bits */ | |
60 | #define PSR_F_BIT 0x00000040 | |
61 | #define PSR_I_BIT 0x00000080 | |
62 | #define PSR_A_BIT 0x00000100 | |
63 | #define PSR_D_BIT 0x00000200 | |
64 | #define PSR_Q_BIT 0x08000000 | |
65 | #define PSR_V_BIT 0x10000000 | |
66 | #define PSR_C_BIT 0x20000000 | |
67 | #define PSR_Z_BIT 0x40000000 | |
68 | #define PSR_N_BIT 0x80000000 | |
69 | ||
70 | /* | |
71 | * Groups of PSR bits | |
72 | */ | |
73 | #define PSR_f 0xff000000 /* Flags */ | |
74 | #define PSR_s 0x00ff0000 /* Status */ | |
75 | #define PSR_x 0x0000ff00 /* Extension */ | |
76 | #define PSR_c 0x000000ff /* Control */ | |
77 | ||
78 | /* | |
79 | * These are 'magic' values for PTRACE_PEEKUSR that return info about where a | |
80 | * process is located in memory. | |
81 | */ | |
82 | #define PT_TEXT_ADDR 0x10000 | |
83 | #define PT_DATA_ADDR 0x10004 | |
84 | #define PT_TEXT_END_ADDR 0x10008 | |
85 | ||
86 | #ifndef __ASSEMBLY__ | |
87 | ||
88 | /* | |
89 | * User structures for general purpose, floating point and debug registers. | |
90 | */ | |
91 | struct user_pt_regs { | |
92 | __u64 regs[31]; | |
93 | __u64 sp; | |
94 | __u64 pc; | |
95 | __u64 pstate; | |
96 | }; | |
97 | ||
98 | struct user_fpsimd_state { | |
99 | __uint128_t vregs[32]; | |
100 | __u32 fpsr; | |
101 | __u32 fpcr; | |
102 | }; | |
103 | ||
104 | struct user_hwdebug_state { | |
105 | __u32 dbg_info; | |
106 | struct { | |
107 | __u64 addr; | |
108 | __u32 ctrl; | |
109 | } dbg_regs[16]; | |
110 | }; | |
111 | ||
112 | #ifdef __KERNEL__ | |
113 | ||
114 | /* sizeof(struct user) for AArch32 */ | |
115 | #define COMPAT_USER_SZ 296 | |
116 | /* AArch32 uses x13 as the stack pointer... */ | |
117 | #define compat_sp regs[13] | |
118 | /* ... and x14 as the link register. */ | |
119 | #define compat_lr regs[14] | |
120 | ||
121 | /* | |
122 | * This struct defines the way the registers are stored on the stack during an | |
123 | * exception. Note that sizeof(struct pt_regs) has to be a multiple of 16 (for | |
124 | * stack alignment). struct user_pt_regs must form a prefix of struct pt_regs. | |
125 | */ | |
126 | struct pt_regs { | |
127 | union { | |
128 | struct user_pt_regs user_regs; | |
129 | struct { | |
130 | u64 regs[31]; | |
131 | u64 sp; | |
132 | u64 pc; | |
133 | u64 pstate; | |
134 | }; | |
135 | }; | |
136 | u64 orig_x0; | |
137 | u64 syscallno; | |
138 | }; | |
139 | ||
140 | #define arch_has_single_step() (1) | |
141 | ||
142 | #ifdef CONFIG_COMPAT | |
143 | #define compat_thumb_mode(regs) \ | |
144 | (((regs)->pstate & COMPAT_PSR_T_BIT)) | |
145 | #else | |
146 | #define compat_thumb_mode(regs) (0) | |
147 | #endif | |
148 | ||
149 | #define user_mode(regs) \ | |
150 | (((regs)->pstate & PSR_MODE_MASK) == PSR_MODE_EL0t) | |
151 | ||
152 | #define compat_user_mode(regs) \ | |
153 | (((regs)->pstate & (PSR_MODE32_BIT | PSR_MODE_MASK)) == \ | |
154 | (PSR_MODE32_BIT | PSR_MODE_EL0t)) | |
155 | ||
156 | #define processor_mode(regs) \ | |
157 | ((regs)->pstate & PSR_MODE_MASK) | |
158 | ||
159 | #define interrupts_enabled(regs) \ | |
160 | (!((regs)->pstate & PSR_I_BIT)) | |
161 | ||
162 | #define fast_interrupts_enabled(regs) \ | |
163 | (!((regs)->pstate & PSR_F_BIT)) | |
164 | ||
165 | #define user_stack_pointer(regs) \ | |
166 | ((regs)->sp) | |
167 | ||
168 | /* | |
169 | * Are the current registers suitable for user mode? (used to maintain | |
170 | * security in signal handlers) | |
171 | */ | |
172 | static inline int valid_user_regs(struct user_pt_regs *regs) | |
173 | { | |
174 | if (user_mode(regs) && (regs->pstate & PSR_I_BIT) == 0) { | |
175 | regs->pstate &= ~(PSR_F_BIT | PSR_A_BIT); | |
176 | ||
177 | /* The T bit is reserved for AArch64 */ | |
178 | if (!(regs->pstate & PSR_MODE32_BIT)) | |
179 | regs->pstate &= ~COMPAT_PSR_T_BIT; | |
180 | ||
181 | return 1; | |
182 | } | |
183 | ||
184 | /* | |
185 | * Force PSR to something logical... | |
186 | */ | |
187 | regs->pstate &= PSR_f | PSR_s | (PSR_x & ~PSR_A_BIT) | \ | |
188 | COMPAT_PSR_T_BIT | PSR_MODE32_BIT; | |
189 | ||
190 | if (!(regs->pstate & PSR_MODE32_BIT)) { | |
191 | regs->pstate &= ~COMPAT_PSR_T_BIT; | |
192 | regs->pstate |= PSR_MODE_EL0t; | |
193 | } | |
194 | ||
195 | return 0; | |
196 | } | |
197 | ||
198 | #define instruction_pointer(regs) (regs)->pc | |
199 | ||
200 | #ifdef CONFIG_SMP | |
201 | extern unsigned long profile_pc(struct pt_regs *regs); | |
202 | #else | |
203 | #define profile_pc(regs) instruction_pointer(regs) | |
204 | #endif | |
205 | ||
206 | extern int aarch32_break_trap(struct pt_regs *regs); | |
207 | ||
208 | #endif /* __KERNEL__ */ | |
209 | ||
210 | #endif /* __ASSEMBLY__ */ | |
211 | ||
212 | #endif |