1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __SPARC_PTRACE_H
3#define __SPARC_PTRACE_H
4
5#include <uapi/asm/ptrace.h>
6
7#if defined(__sparc__) && defined(__arch64__)
8#ifndef __ASSEMBLY__
9
10#include <linux/compiler.h>
11#include <linux/threads.h>
12#include <asm/switch_to.h>
13
14static inline int pt_regs_trap_type(struct pt_regs *regs)
15{
16	return regs->magic & 0x1ff;
17}
18
19static inline bool pt_regs_is_syscall(struct pt_regs *regs)
20{
21	return (regs->tstate & TSTATE_SYSCALL);
22}
23
24static inline bool pt_regs_clear_syscall(struct pt_regs *regs)
25{
26	return (regs->tstate &= ~TSTATE_SYSCALL);
27}
28
29#define arch_ptrace_stop_needed() \
30({	flush_user_windows(); \
31	get_thread_wsaved() != 0; \
32})
33
34#define arch_ptrace_stop() \
35	synchronize_user_stack()
36
37#define current_pt_regs() \
38	((struct pt_regs *)((unsigned long)current_thread_info() + THREAD_SIZE) - 1)
39
40struct global_reg_snapshot {
41	unsigned long		tstate;
42	unsigned long		tpc;
43	unsigned long		tnpc;
44	unsigned long		o7;
45	unsigned long		i7;
46	unsigned long		rpc;
47	struct thread_info	*thread;
48	unsigned long		pad1;
49};
50
51struct global_pmu_snapshot {
52	unsigned long		pcr[4];
53	unsigned long		pic[4];
54};
55
56union global_cpu_snapshot {
57	struct global_reg_snapshot	reg;
58	struct global_pmu_snapshot	pmu;
59};
60
61extern union global_cpu_snapshot global_cpu_snapshot[NR_CPUS];
62
63#define force_successful_syscall_return() set_thread_noerror(1)
64#define user_mode(regs) (!((regs)->tstate & TSTATE_PRIV))
65#define instruction_pointer(regs) ((regs)->tpc)
66#define instruction_pointer_set(regs, val) do { \
67		(regs)->tpc = (val); \
68		(regs)->tnpc = (val)+4; \
69	} while (0)
70#define user_stack_pointer(regs) ((regs)->u_regs[UREG_FP])
71static inline int is_syscall_success(struct pt_regs *regs)
72{
73	return !(regs->tstate & (TSTATE_XCARRY | TSTATE_ICARRY));
74}
75
76static inline long regs_return_value(struct pt_regs *regs)
77{
78	return regs->u_regs[UREG_I0];
79}
80#ifdef CONFIG_SMP
81unsigned long profile_pc(struct pt_regs *);
82#else
83#define profile_pc(regs) instruction_pointer(regs)
84#endif
85
86#define MAX_REG_OFFSET (offsetof(struct pt_regs, magic))
87
88int regs_query_register_offset(const char *name);
89unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs, unsigned int n);
90
91/**
92 * regs_get_register() - get register value from its offset
93 * @regs:	pt_regs from which register value is gotten
94 * @offset:	offset number of the register.
95 *
96 * regs_get_register returns the value of a register whose
97 * offset from @regs. The @offset is the offset of the register
98 * in struct pt_regs. If @offset is bigger than MAX_REG_OFFSET,
99 * this returns 0.
100 */
101static inline unsigned long regs_get_register(struct pt_regs *regs,
102					     unsigned long offset)
103{
104	if (unlikely(offset >= MAX_REG_OFFSET))
105		return 0;
106	if (offset == PT_V9_Y)
107		return *(unsigned int *)((unsigned long)regs + offset);
108	return *(unsigned long *)((unsigned long)regs + offset);
109}
110
111/* Valid only for Kernel mode traps. */
112static inline unsigned long kernel_stack_pointer(struct pt_regs *regs)
113{
114	return regs->u_regs[UREG_I6];
115}
116#else /* __ASSEMBLY__ */
117#endif /* __ASSEMBLY__ */
118#else /* (defined(__sparc__) && defined(__arch64__)) */
119#ifndef __ASSEMBLY__
120#include <asm/switch_to.h>
121
122static inline bool pt_regs_is_syscall(struct pt_regs *regs)
123{
124	return (regs->psr & PSR_SYSCALL);
125}
126
127static inline bool pt_regs_clear_syscall(struct pt_regs *regs)
128{
129	return (regs->psr &= ~PSR_SYSCALL);
130}
131
132#define arch_ptrace_stop_needed() \
133({	flush_user_windows(); \
134	current_thread_info()->w_saved != 0;	\
135})
136
137#define arch_ptrace_stop() \
138	synchronize_user_stack()
139
140#define current_pt_regs() \
141	((struct pt_regs *)((unsigned long)current_thread_info() + THREAD_SIZE) - 1)
142
143#define user_mode(regs) (!((regs)->psr & PSR_PS))
144#define instruction_pointer(regs) ((regs)->pc)
145#define user_stack_pointer(regs) ((regs)->u_regs[UREG_FP])
146unsigned long profile_pc(struct pt_regs *);
147#else /* (!__ASSEMBLY__) */
148#endif /* (!__ASSEMBLY__) */
149#endif /* (defined(__sparc__) && defined(__arch64__)) */
150#define STACK_BIAS		2047
151
152/* global_reg_snapshot offsets */
153#define GR_SNAP_TSTATE	0x00
154#define GR_SNAP_TPC	0x08
155#define GR_SNAP_TNPC	0x10
156#define GR_SNAP_O7	0x18
157#define GR_SNAP_I7	0x20
158#define GR_SNAP_RPC	0x28
159#define GR_SNAP_THREAD	0x30
160#define GR_SNAP_PAD1	0x38
161
162#endif /* !(__SPARC_PTRACE_H) */
163