1 /* SPDX-License-Identifier: GPL-2.0-only */
2 #ifndef __ASM_COMPAT_H
3 #define __ASM_COMPAT_H
4
5 #define COMPAT_UTS_MACHINE "riscv\0\0"
6
7 /*
8 * Architecture specific compatibility types
9 */
10 #include <linux/types.h>
11 #include <linux/sched.h>
12 #include <linux/sched/task_stack.h>
13 #include <asm-generic/compat.h>
14
15 static inline int is_compat_task(void)
16 {
17 if (!IS_ENABLED(CONFIG_COMPAT))
18 return 0;
19
20 return test_thread_flag(TIF_32BIT);
21 }
22
23 static inline int is_compat_thread(struct thread_info *thread)
24 {
25 if (!IS_ENABLED(CONFIG_COMPAT))
26 return 0;
27
28 return test_ti_thread_flag(thread, TIF_32BIT);
29 }
30
31 static inline void set_compat_task(bool is_compat)
32 {
33 if (is_compat)
34 set_thread_flag(TIF_32BIT);
35 else
36 clear_thread_flag(TIF_32BIT);
37 }
38
39 struct compat_user_regs_struct {
40 compat_ulong_t pc;
41 compat_ulong_t ra;
42 compat_ulong_t sp;
43 compat_ulong_t gp;
44 compat_ulong_t tp;
45 compat_ulong_t t0;
46 compat_ulong_t t1;
47 compat_ulong_t t2;
48 compat_ulong_t s0;
49 compat_ulong_t s1;
50 compat_ulong_t a0;
51 compat_ulong_t a1;
52 compat_ulong_t a2;
53 compat_ulong_t a3;
54 compat_ulong_t a4;
55 compat_ulong_t a5;
56 compat_ulong_t a6;
57 compat_ulong_t a7;
58 compat_ulong_t s2;
59 compat_ulong_t s3;
60 compat_ulong_t s4;
61 compat_ulong_t s5;
62 compat_ulong_t s6;
63 compat_ulong_t s7;
64 compat_ulong_t s8;
65 compat_ulong_t s9;
66 compat_ulong_t s10;
67 compat_ulong_t s11;
68 compat_ulong_t t3;
69 compat_ulong_t t4;
70 compat_ulong_t t5;
71 compat_ulong_t t6;
72 };
73
74 static inline void regs_to_cregs(struct compat_user_regs_struct *cregs,
75 struct pt_regs *regs)
76 {
77 cregs->pc = (compat_ulong_t) regs->epc;
78 cregs->ra = (compat_ulong_t) regs->ra;
79 cregs->sp = (compat_ulong_t) regs->sp;
80 cregs->gp = (compat_ulong_t) regs->gp;
81 cregs->tp = (compat_ulong_t) regs->tp;
82 cregs->t0 = (compat_ulong_t) regs->t0;
83 cregs->t1 = (compat_ulong_t) regs->t1;
84 cregs->t2 = (compat_ulong_t) regs->t2;
85 cregs->s0 = (compat_ulong_t) regs->s0;
86 cregs->s1 = (compat_ulong_t) regs->s1;
87 cregs->a0 = (compat_ulong_t) regs->a0;
88 cregs->a1 = (compat_ulong_t) regs->a1;
89 cregs->a2 = (compat_ulong_t) regs->a2;
90 cregs->a3 = (compat_ulong_t) regs->a3;
91 cregs->a4 = (compat_ulong_t) regs->a4;
92 cregs->a5 = (compat_ulong_t) regs->a5;
93 cregs->a6 = (compat_ulong_t) regs->a6;
94 cregs->a7 = (compat_ulong_t) regs->a7;
95 cregs->s2 = (compat_ulong_t) regs->s2;
96 cregs->s3 = (compat_ulong_t) regs->s3;
97 cregs->s4 = (compat_ulong_t) regs->s4;
98 cregs->s5 = (compat_ulong_t) regs->s5;
99 cregs->s6 = (compat_ulong_t) regs->s6;
100 cregs->s7 = (compat_ulong_t) regs->s7;
101 cregs->s8 = (compat_ulong_t) regs->s8;
102 cregs->s9 = (compat_ulong_t) regs->s9;
103 cregs->s10 = (compat_ulong_t) regs->s10;
104 cregs->s11 = (compat_ulong_t) regs->s11;
105 cregs->t3 = (compat_ulong_t) regs->t3;
106 cregs->t4 = (compat_ulong_t) regs->t4;
107 cregs->t5 = (compat_ulong_t) regs->t5;
108 cregs->t6 = (compat_ulong_t) regs->t6;
109 };
110
111 static inline void cregs_to_regs(struct compat_user_regs_struct *cregs,
112 struct pt_regs *regs)
113 {
114 regs->epc = (unsigned long) cregs->pc;
115 regs->ra = (unsigned long) cregs->ra;
116 regs->sp = (unsigned long) cregs->sp;
117 regs->gp = (unsigned long) cregs->gp;
118 regs->tp = (unsigned long) cregs->tp;
119 regs->t0 = (unsigned long) cregs->t0;
120 regs->t1 = (unsigned long) cregs->t1;
121 regs->t2 = (unsigned long) cregs->t2;
122 regs->s0 = (unsigned long) cregs->s0;
123 regs->s1 = (unsigned long) cregs->s1;
124 regs->a0 = (unsigned long) cregs->a0;
125 regs->a1 = (unsigned long) cregs->a1;
126 regs->a2 = (unsigned long) cregs->a2;
127 regs->a3 = (unsigned long) cregs->a3;
128 regs->a4 = (unsigned long) cregs->a4;
129 regs->a5 = (unsigned long) cregs->a5;
130 regs->a6 = (unsigned long) cregs->a6;
131 regs->a7 = (unsigned long) cregs->a7;
132 regs->s2 = (unsigned long) cregs->s2;
133 regs->s3 = (unsigned long) cregs->s3;
134 regs->s4 = (unsigned long) cregs->s4;
135 regs->s5 = (unsigned long) cregs->s5;
136 regs->s6 = (unsigned long) cregs->s6;
137 regs->s7 = (unsigned long) cregs->s7;
138 regs->s8 = (unsigned long) cregs->s8;
139 regs->s9 = (unsigned long) cregs->s9;
140 regs->s10 = (unsigned long) cregs->s10;
141 regs->s11 = (unsigned long) cregs->s11;
142 regs->t3 = (unsigned long) cregs->t3;
143 regs->t4 = (unsigned long) cregs->t4;
144 regs->t5 = (unsigned long) cregs->t5;
145 regs->t6 = (unsigned long) cregs->t6;
146 };
147
148 #endif /* __ASM_COMPAT_H */
149
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