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8#ifndef __ASM_PTRACE_H
9#define __ASM_PTRACE_H
10
11#include <asm/cpufeature.h>
12
13#include <uapi/asm/ptrace.h>
14
15
16#define CurrentEL_EL1 (1 << 2)
17#define CurrentEL_EL2 (2 << 2)
18
19#define INIT_PSTATE_EL1 \
20 (PSR_D_BIT | PSR_A_BIT | PSR_I_BIT | PSR_F_BIT | PSR_MODE_EL1h)
21#define INIT_PSTATE_EL2 \
22 (PSR_D_BIT | PSR_A_BIT | PSR_I_BIT | PSR_F_BIT | PSR_MODE_EL2h)
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37
38#define GIC_PRIO_IRQON 0xe0
39#define __GIC_PRIO_IRQOFF (GIC_PRIO_IRQON & ~0x80)
40#define __GIC_PRIO_IRQOFF_NS 0xa0
41#define GIC_PRIO_PSR_I_SET (1 << 4)
42
43#define GIC_PRIO_IRQOFF \
44 ({ \
45 extern struct static_key_false gic_nonsecure_priorities;\
46 u8 __prio = __GIC_PRIO_IRQOFF; \
47 \
48 if (static_branch_unlikely(&gic_nonsecure_priorities)) \
49 __prio = __GIC_PRIO_IRQOFF_NS; \
50 \
51 __prio; \
52 })
53
54
55#define PSR_MODE_THREAD_BIT (1 << 0)
56#define PSR_IL_BIT (1 << 20)
57
58
59#define COMPAT_PTRACE_GETREGS 12
60#define COMPAT_PTRACE_SETREGS 13
61#define COMPAT_PTRACE_GET_THREAD_AREA 22
62#define COMPAT_PTRACE_SET_SYSCALL 23
63#define COMPAT_PTRACE_GETVFPREGS 27
64#define COMPAT_PTRACE_SETVFPREGS 28
65#define COMPAT_PTRACE_GETHBPREGS 29
66#define COMPAT_PTRACE_SETHBPREGS 30
67
68
69#define PSR_AA32_MODE_MASK 0x0000001f
70#define PSR_AA32_MODE_USR 0x00000010
71#define PSR_AA32_MODE_FIQ 0x00000011
72#define PSR_AA32_MODE_IRQ 0x00000012
73#define PSR_AA32_MODE_SVC 0x00000013
74#define PSR_AA32_MODE_ABT 0x00000017
75#define PSR_AA32_MODE_HYP 0x0000001a
76#define PSR_AA32_MODE_UND 0x0000001b
77#define PSR_AA32_MODE_SYS 0x0000001f
78#define PSR_AA32_T_BIT 0x00000020
79#define PSR_AA32_F_BIT 0x00000040
80#define PSR_AA32_I_BIT 0x00000080
81#define PSR_AA32_A_BIT 0x00000100
82#define PSR_AA32_E_BIT 0x00000200
83#define PSR_AA32_PAN_BIT 0x00400000
84#define PSR_AA32_SSBS_BIT 0x00800000
85#define PSR_AA32_DIT_BIT 0x01000000
86#define PSR_AA32_Q_BIT 0x08000000
87#define PSR_AA32_V_BIT 0x10000000
88#define PSR_AA32_C_BIT 0x20000000
89#define PSR_AA32_Z_BIT 0x40000000
90#define PSR_AA32_N_BIT 0x80000000
91#define PSR_AA32_IT_MASK 0x0600fc00
92#define PSR_AA32_GE_MASK 0x000f0000
93
94#ifdef CONFIG_CPU_BIG_ENDIAN
95#define PSR_AA32_ENDSTATE PSR_AA32_E_BIT
96#else
97#define PSR_AA32_ENDSTATE 0
98#endif
99
100
101#define COMPAT_PSR_DIT_BIT 0x00200000
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106
107#define COMPAT_PT_TEXT_ADDR 0x10000
108#define COMPAT_PT_DATA_ADDR 0x10004
109#define COMPAT_PT_TEXT_END_ADDR 0x10008
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117
118#define NO_SYSCALL (-1)
119
120#ifndef __ASSEMBLY__
121#include <linux/bug.h>
122#include <linux/types.h>
123
124
125#define COMPAT_USER_SZ 296
126
127
128#define compat_usr(x) regs[(x)]
129#define compat_fp regs[11]
130#define compat_sp regs[13]
131#define compat_lr regs[14]
132#define compat_sp_hyp regs[15]
133#define compat_lr_irq regs[16]
134#define compat_sp_irq regs[17]
135#define compat_lr_svc regs[18]
136#define compat_sp_svc regs[19]
137#define compat_lr_abt regs[20]
138#define compat_sp_abt regs[21]
139#define compat_lr_und regs[22]
140#define compat_sp_und regs[23]
141#define compat_r8_fiq regs[24]
142#define compat_r9_fiq regs[25]
143#define compat_r10_fiq regs[26]
144#define compat_r11_fiq regs[27]
145#define compat_r12_fiq regs[28]
146#define compat_sp_fiq regs[29]
147#define compat_lr_fiq regs[30]
148
149static inline unsigned long compat_psr_to_pstate(const unsigned long psr)
150{
151 unsigned long pstate;
152
153 pstate = psr & ~COMPAT_PSR_DIT_BIT;
154
155 if (psr & COMPAT_PSR_DIT_BIT)
156 pstate |= PSR_AA32_DIT_BIT;
157
158 return pstate;
159}
160
161static inline unsigned long pstate_to_compat_psr(const unsigned long pstate)
162{
163 unsigned long psr;
164
165 psr = pstate & ~PSR_AA32_DIT_BIT;
166
167 if (pstate & PSR_AA32_DIT_BIT)
168 psr |= COMPAT_PSR_DIT_BIT;
169
170 return psr;
171}
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177
178struct pt_regs {
179 union {
180 struct user_pt_regs user_regs;
181 struct {
182 u64 regs[31];
183 u64 sp;
184 u64 pc;
185 u64 pstate;
186 };
187 };
188 u64 orig_x0;
189#ifdef __AARCH64EB__
190 u32 unused2;
191 s32 syscallno;
192#else
193 s32 syscallno;
194 u32 unused2;
195#endif
196 u64 sdei_ttbr1;
197
198 u64 pmr_save;
199 u64 stackframe[2];
200
201
202 u64 lockdep_hardirqs;
203 u64 exit_rcu;
204};
205
206static inline bool in_syscall(struct pt_regs const *regs)
207{
208 return regs->syscallno != NO_SYSCALL;
209}
210
211static inline void forget_syscall(struct pt_regs *regs)
212{
213 regs->syscallno = NO_SYSCALL;
214}
215
216#define MAX_REG_OFFSET offsetof(struct pt_regs, pstate)
217
218#define arch_has_single_step() (1)
219
220#ifdef CONFIG_COMPAT
221#define compat_thumb_mode(regs) \
222 (((regs)->pstate & PSR_AA32_T_BIT))
223#else
224#define compat_thumb_mode(regs) (0)
225#endif
226
227#define user_mode(regs) \
228 (((regs)->pstate & PSR_MODE_MASK) == PSR_MODE_EL0t)
229
230#define compat_user_mode(regs) \
231 (((regs)->pstate & (PSR_MODE32_BIT | PSR_MODE_MASK)) == \
232 (PSR_MODE32_BIT | PSR_MODE_EL0t))
233
234#define processor_mode(regs) \
235 ((regs)->pstate & PSR_MODE_MASK)
236
237#define irqs_priority_unmasked(regs) \
238 (system_uses_irq_prio_masking() ? \
239 (regs)->pmr_save == GIC_PRIO_IRQON : \
240 true)
241
242#define interrupts_enabled(regs) \
243 (!((regs)->pstate & PSR_I_BIT) && irqs_priority_unmasked(regs))
244
245#define fast_interrupts_enabled(regs) \
246 (!((regs)->pstate & PSR_F_BIT))
247
248static inline unsigned long user_stack_pointer(struct pt_regs *regs)
249{
250 if (compat_user_mode(regs))
251 return regs->compat_sp;
252 return regs->sp;
253}
254
255extern int regs_query_register_offset(const char *name);
256extern unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs,
257 unsigned int n);
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268static inline u64 regs_get_register(struct pt_regs *regs, unsigned int offset)
269{
270 u64 val = 0;
271
272 WARN_ON(offset & 7);
273
274 offset >>= 3;
275 switch (offset) {
276 case 0 ... 30:
277 val = regs->regs[offset];
278 break;
279 case offsetof(struct pt_regs, sp) >> 3:
280 val = regs->sp;
281 break;
282 case offsetof(struct pt_regs, pc) >> 3:
283 val = regs->pc;
284 break;
285 case offsetof(struct pt_regs, pstate) >> 3:
286 val = regs->pstate;
287 break;
288 default:
289 val = 0;
290 }
291
292 return val;
293}
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298
299static inline unsigned long pt_regs_read_reg(const struct pt_regs *regs, int r)
300{
301 return (r == 31) ? 0 : regs->regs[r];
302}
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308static inline void pt_regs_write_reg(struct pt_regs *regs, int r,
309 unsigned long val)
310{
311 if (r != 31)
312 regs->regs[r] = val;
313}
314
315
316static inline unsigned long kernel_stack_pointer(struct pt_regs *regs)
317{
318 return regs->sp;
319}
320
321static inline unsigned long regs_return_value(struct pt_regs *regs)
322{
323 unsigned long val = regs->regs[0];
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330 if (compat_user_mode(regs))
331 val = sign_extend64(val, 31);
332
333 return val;
334}
335
336static inline void regs_set_return_value(struct pt_regs *regs, unsigned long rc)
337{
338 regs->regs[0] = rc;
339}
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354static inline unsigned long regs_get_kernel_argument(struct pt_regs *regs,
355 unsigned int n)
356{
357#define NR_REG_ARGUMENTS 8
358 if (n < NR_REG_ARGUMENTS)
359 return pt_regs_read_reg(regs, n);
360 return 0;
361}
362
363
364struct task_struct;
365int valid_user_regs(struct user_pt_regs *regs, struct task_struct *task);
366
367static inline unsigned long instruction_pointer(struct pt_regs *regs)
368{
369 return regs->pc;
370}
371static inline void instruction_pointer_set(struct pt_regs *regs,
372 unsigned long val)
373{
374 regs->pc = val;
375}
376
377static inline unsigned long frame_pointer(struct pt_regs *regs)
378{
379 return regs->regs[29];
380}
381
382#define procedure_link_pointer(regs) ((regs)->regs[30])
383
384static inline void procedure_link_pointer_set(struct pt_regs *regs,
385 unsigned long val)
386{
387 procedure_link_pointer(regs) = val;
388}
389
390extern unsigned long profile_pc(struct pt_regs *regs);
391
392#endif
393#endif
394