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1 #ifndef __SPARC_PTRACE_H
2 #define __SPARC_PTRACE_H
3 
4 #include <uapi/asm/ptrace.h>
5 
6 #if defined(__sparc__) && defined(__arch64__)
7 #ifndef __ASSEMBLY__
8 
9 #include <linux/threads.h>
10 #include <asm/switch_to.h>
11 
pt_regs_trap_type(struct pt_regs * regs)12 static inline int pt_regs_trap_type(struct pt_regs *regs)
13 {
14 	return regs->magic & 0x1ff;
15 }
16 
pt_regs_is_syscall(struct pt_regs * regs)17 static inline bool pt_regs_is_syscall(struct pt_regs *regs)
18 {
19 	return (regs->tstate & TSTATE_SYSCALL);
20 }
21 
pt_regs_clear_syscall(struct pt_regs * regs)22 static inline bool pt_regs_clear_syscall(struct pt_regs *regs)
23 {
24 	return (regs->tstate &= ~TSTATE_SYSCALL);
25 }
26 
27 #define arch_ptrace_stop_needed(exit_code, info) \
28 ({	flush_user_windows(); \
29 	get_thread_wsaved() != 0; \
30 })
31 
32 #define arch_ptrace_stop(exit_code, info) \
33 	synchronize_user_stack()
34 
35 #define current_pt_regs() \
36 	((struct pt_regs *)((unsigned long)current_thread_info() + THREAD_SIZE) - 1)
37 
38 struct global_reg_snapshot {
39 	unsigned long		tstate;
40 	unsigned long		tpc;
41 	unsigned long		tnpc;
42 	unsigned long		o7;
43 	unsigned long		i7;
44 	unsigned long		rpc;
45 	struct thread_info	*thread;
46 	unsigned long		pad1;
47 };
48 
49 struct global_pmu_snapshot {
50 	unsigned long		pcr[4];
51 	unsigned long		pic[4];
52 };
53 
54 union global_cpu_snapshot {
55 	struct global_reg_snapshot	reg;
56 	struct global_pmu_snapshot	pmu;
57 };
58 
59 extern union global_cpu_snapshot global_cpu_snapshot[NR_CPUS];
60 
61 #define force_successful_syscall_return() set_thread_noerror(1)
62 #define user_mode(regs) (!((regs)->tstate & TSTATE_PRIV))
63 #define instruction_pointer(regs) ((regs)->tpc)
64 #define instruction_pointer_set(regs, val) ((regs)->tpc = (val))
65 #define user_stack_pointer(regs) ((regs)->u_regs[UREG_FP])
is_syscall_success(struct pt_regs * regs)66 static inline int is_syscall_success(struct pt_regs *regs)
67 {
68 	return !(regs->tstate & (TSTATE_XCARRY | TSTATE_ICARRY));
69 }
70 
regs_return_value(struct pt_regs * regs)71 static inline long regs_return_value(struct pt_regs *regs)
72 {
73 	return regs->u_regs[UREG_I0];
74 }
75 #ifdef CONFIG_SMP
76 unsigned long profile_pc(struct pt_regs *);
77 #else
78 #define profile_pc(regs) instruction_pointer(regs)
79 #endif
80 #else /* __ASSEMBLY__ */
81 #endif /* __ASSEMBLY__ */
82 #else /* (defined(__sparc__) && defined(__arch64__)) */
83 #ifndef __ASSEMBLY__
84 #include <asm/switch_to.h>
85 
pt_regs_is_syscall(struct pt_regs * regs)86 static inline bool pt_regs_is_syscall(struct pt_regs *regs)
87 {
88 	return (regs->psr & PSR_SYSCALL);
89 }
90 
pt_regs_clear_syscall(struct pt_regs * regs)91 static inline bool pt_regs_clear_syscall(struct pt_regs *regs)
92 {
93 	return (regs->psr &= ~PSR_SYSCALL);
94 }
95 
96 #define arch_ptrace_stop_needed(exit_code, info) \
97 ({	flush_user_windows(); \
98 	current_thread_info()->w_saved != 0;	\
99 })
100 
101 #define arch_ptrace_stop(exit_code, info) \
102 	synchronize_user_stack()
103 
104 #define current_pt_regs() \
105 	((struct pt_regs *)((unsigned long)current_thread_info() + THREAD_SIZE) - 1)
106 
107 #define user_mode(regs) (!((regs)->psr & PSR_PS))
108 #define instruction_pointer(regs) ((regs)->pc)
109 #define user_stack_pointer(regs) ((regs)->u_regs[UREG_FP])
110 unsigned long profile_pc(struct pt_regs *);
111 #else /* (!__ASSEMBLY__) */
112 #endif /* (!__ASSEMBLY__) */
113 #endif /* (defined(__sparc__) && defined(__arch64__)) */
114 #define STACK_BIAS		2047
115 
116 /* global_reg_snapshot offsets */
117 #define GR_SNAP_TSTATE	0x00
118 #define GR_SNAP_TPC	0x08
119 #define GR_SNAP_TNPC	0x10
120 #define GR_SNAP_O7	0x18
121 #define GR_SNAP_I7	0x20
122 #define GR_SNAP_RPC	0x28
123 #define GR_SNAP_THREAD	0x30
124 #define GR_SNAP_PAD1	0x38
125 
126 #endif /* !(__SPARC_PTRACE_H) */
127