arch/sh/include/asm/syscall_64.h

   1 #ifndef __ASM_SH_SYSCALL_64_H
   2 #define __ASM_SH_SYSCALL_64_H
   3
   4 #include <linux/kernel.h>
   5 #include <linux/sched.h>
   6 #include <asm/ptrace.h>
   7
   8 /* The system call number is given by the user in R9 */
   9 static inline long syscall_get_nr(struct task_struct *task,
  10                                   struct pt_regs *regs)
  11 {
  12         return (regs->syscall_nr >= 0) ? regs->regs[9] : -1L;
  13 }
  14
  15 static inline void syscall_rollback(struct task_struct *task,
  16                                     struct pt_regs *regs)
  17 {
  18         /*
  19          * XXX: This needs some thought. On SH we don't
  20          * save away the original R9 value anywhere.
  21          */
  22 }
  23
  24 static inline long syscall_get_error(struct task_struct *task,
  25                                      struct pt_regs *regs)
  26 {
  27         return IS_ERR_VALUE(regs->regs[9]) ? regs->regs[9] : 0;
  28 }
  29
  30 static inline long syscall_get_return_value(struct task_struct *task,
  31                                             struct pt_regs *regs)
  32 {
  33         return regs->regs[9];
  34 }
  35
  36 static inline void syscall_set_return_value(struct task_struct *task,
  37                                             struct pt_regs *regs,
  38                                             int error, long val)
  39 {
  40         if (error)
  41                 regs->regs[9] = -error;
  42         else
  43                 regs->regs[9] = val;
  44 }
  45
  46 static inline void syscall_get_arguments(struct task_struct *task,
  47                                          struct pt_regs *regs,
  48                                          unsigned int i, unsigned int n,
  49                                          unsigned long *args)
  50 {
  51         BUG_ON(i + n > 6);
  52         memcpy(args, &regs->regs[2 + i], n * sizeof(args[0]));
  53 }
  54
  55 static inline void syscall_set_arguments(struct task_struct *task,
  56                                          struct pt_regs *regs,
  57                                          unsigned int i, unsigned int n,
  58                                          const unsigned long *args)
  59 {
  60         BUG_ON(i + n > 6);
  61         memcpy(&regs->regs[2 + i], args, n * sizeof(args[0]));
  62 }
  63
  64 #endif /* __ASM_SH_SYSCALL_64_H */