arch/riscv/include/asm/compat.h

   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 */