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         return test_thread_flag(TIF_32BIT);
  18 }
  19
  20 struct compat_user_regs_struct {
  21         compat_ulong_t pc;
  22         compat_ulong_t ra;
  23         compat_ulong_t sp;
  24         compat_ulong_t gp;
  25         compat_ulong_t tp;
  26         compat_ulong_t t0;
  27         compat_ulong_t t1;
  28         compat_ulong_t t2;
  29         compat_ulong_t s0;
  30         compat_ulong_t s1;
  31         compat_ulong_t a0;
  32         compat_ulong_t a1;
  33         compat_ulong_t a2;
  34         compat_ulong_t a3;
  35         compat_ulong_t a4;
  36         compat_ulong_t a5;
  37         compat_ulong_t a6;
  38         compat_ulong_t a7;
  39         compat_ulong_t s2;
  40         compat_ulong_t s3;
  41         compat_ulong_t s4;
  42         compat_ulong_t s5;
  43         compat_ulong_t s6;
  44         compat_ulong_t s7;
  45         compat_ulong_t s8;
  46         compat_ulong_t s9;
  47         compat_ulong_t s10;
  48         compat_ulong_t s11;
  49         compat_ulong_t t3;
  50         compat_ulong_t t4;
  51         compat_ulong_t t5;
  52         compat_ulong_t t6;
  53 };
  54
  55 static inline void regs_to_cregs(struct compat_user_regs_struct *cregs,
  56                                  struct pt_regs *regs)
  57 {
  58         cregs->pc       = (compat_ulong_t) regs->epc;
  59         cregs->ra       = (compat_ulong_t) regs->ra;
  60         cregs->sp       = (compat_ulong_t) regs->sp;
  61         cregs->gp       = (compat_ulong_t) regs->gp;
  62         cregs->tp       = (compat_ulong_t) regs->tp;
  63         cregs->t0       = (compat_ulong_t) regs->t0;
  64         cregs->t1       = (compat_ulong_t) regs->t1;
  65         cregs->t2       = (compat_ulong_t) regs->t2;
  66         cregs->s0       = (compat_ulong_t) regs->s0;
  67         cregs->s1       = (compat_ulong_t) regs->s1;
  68         cregs->a0       = (compat_ulong_t) regs->a0;
  69         cregs->a1       = (compat_ulong_t) regs->a1;
  70         cregs->a2       = (compat_ulong_t) regs->a2;
  71         cregs->a3       = (compat_ulong_t) regs->a3;
  72         cregs->a4       = (compat_ulong_t) regs->a4;
  73         cregs->a5       = (compat_ulong_t) regs->a5;
  74         cregs->a6       = (compat_ulong_t) regs->a6;
  75         cregs->a7       = (compat_ulong_t) regs->a7;
  76         cregs->s2       = (compat_ulong_t) regs->s2;
  77         cregs->s3       = (compat_ulong_t) regs->s3;
  78         cregs->s4       = (compat_ulong_t) regs->s4;
  79         cregs->s5       = (compat_ulong_t) regs->s5;
  80         cregs->s6       = (compat_ulong_t) regs->s6;
  81         cregs->s7       = (compat_ulong_t) regs->s7;
  82         cregs->s8       = (compat_ulong_t) regs->s8;
  83         cregs->s9       = (compat_ulong_t) regs->s9;
  84         cregs->s10      = (compat_ulong_t) regs->s10;
  85         cregs->s11      = (compat_ulong_t) regs->s11;
  86         cregs->t3       = (compat_ulong_t) regs->t3;
  87         cregs->t4       = (compat_ulong_t) regs->t4;
  88         cregs->t5       = (compat_ulong_t) regs->t5;
  89         cregs->t6       = (compat_ulong_t) regs->t6;
  90 };
  91
  92 static inline void cregs_to_regs(struct compat_user_regs_struct *cregs,
  93                                  struct pt_regs *regs)
  94 {
  95         regs->epc       = (unsigned long) cregs->pc;
  96         regs->ra        = (unsigned long) cregs->ra;
  97         regs->sp        = (unsigned long) cregs->sp;
  98         regs->gp        = (unsigned long) cregs->gp;
  99         regs->tp        = (unsigned long) cregs->tp;
 100         regs->t0        = (unsigned long) cregs->t0;
 101         regs->t1        = (unsigned long) cregs->t1;
 102         regs->t2        = (unsigned long) cregs->t2;
 103         regs->s0        = (unsigned long) cregs->s0;
 104         regs->s1        = (unsigned long) cregs->s1;
 105         regs->a0        = (unsigned long) cregs->a0;
 106         regs->a1        = (unsigned long) cregs->a1;
 107         regs->a2        = (unsigned long) cregs->a2;
 108         regs->a3        = (unsigned long) cregs->a3;
 109         regs->a4        = (unsigned long) cregs->a4;
 110         regs->a5        = (unsigned long) cregs->a5;
 111         regs->a6        = (unsigned long) cregs->a6;
 112         regs->a7        = (unsigned long) cregs->a7;
 113         regs->s2        = (unsigned long) cregs->s2;
 114         regs->s3        = (unsigned long) cregs->s3;
 115         regs->s4        = (unsigned long) cregs->s4;
 116         regs->s5        = (unsigned long) cregs->s5;
 117         regs->s6        = (unsigned long) cregs->s6;
 118         regs->s7        = (unsigned long) cregs->s7;
 119         regs->s8        = (unsigned long) cregs->s8;
 120         regs->s9        = (unsigned long) cregs->s9;
 121         regs->s10       = (unsigned long) cregs->s10;
 122         regs->s11       = (unsigned long) cregs->s11;
 123         regs->t3        = (unsigned long) cregs->t3;
 124         regs->t4        = (unsigned long) cregs->t4;
 125         regs->t5        = (unsigned long) cregs->t5;
 126         regs->t6        = (unsigned long) cregs->t6;
 127 };
 128
 129 #endif /* __ASM_COMPAT_H */