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
14 static inline int pt_regs_trap_type(struct pt_regs *regs)
15 {
16 return regs->magic & 0x1ff;
17 }
18
19 static inline bool pt_regs_is_syscall(struct pt_regs *regs)
20 {
21 return (regs->tstate & TSTATE_SYSCALL);
22 }
23
24 static 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
40 struct 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
51 struct global_pmu_snapshot {
52 unsigned long pcr[4];
53 unsigned long pic[4];
54 };
55
56 union global_cpu_snapshot {
57 struct global_reg_snapshot reg;
58 struct global_pmu_snapshot pmu;
59 };
60
61 extern 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])
71 static inline int is_syscall_success(struct pt_regs *regs)
72 {
73 return !(regs->tstate & (TSTATE_XCARRY | TSTATE_ICARRY));
74 }
75
76 static inline long regs_return_value(struct pt_regs *regs)
77 {
78 return regs->u_regs[UREG_I0];
79 }
80 #ifdef CONFIG_SMP
81 unsigned 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
88 int regs_query_register_offset(const char *name);
89 unsigned 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 */
101 static 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. */
112 static 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
122 static inline bool pt_regs_is_syscall(struct pt_regs *regs)
123 {
124 return (regs->psr & PSR_SYSCALL);
125 }
126
127 static 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])
146 unsigned 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
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