LXR linux/arch/csky/include/asm/syscall.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2
   3#ifndef __ASM_SYSCALL_H
   4#define __ASM_SYSCALL_H
   5
   6#include <linux/sched.h>
   7#include <linux/err.h>
   8#include <abi/regdef.h>
   9#include <uapi/linux/audit.h>
  10
  11static inline int
  12syscall_get_nr(struct task_struct *task, struct pt_regs *regs)
  13{
  14        return regs_syscallid(regs);
  15}
  16
  17static inline void
  18syscall_rollback(struct task_struct *task, struct pt_regs *regs)
  19{
  20        regs->a0 = regs->orig_a0;
  21}
  22
  23static inline long
  24syscall_get_error(struct task_struct *task, struct pt_regs *regs)
  25{
  26        unsigned long error = regs->a0;
  27
  28        return IS_ERR_VALUE(error) ? error : 0;
  29}
  30
  31static inline long
  32syscall_get_return_value(struct task_struct *task, struct pt_regs *regs)
  33{
  34        return regs->a0;
  35}
  36
  37static inline void
  38syscall_set_return_value(struct task_struct *task, struct pt_regs *regs,
  39                int error, long val)
  40{
  41        regs->a0 = (long) error ?: val;
  42}
  43
  44static inline void
  45syscall_get_arguments(struct task_struct *task, struct pt_regs *regs,
  46                      unsigned int i, unsigned int n, unsigned long *args)
  47{
  48        BUG_ON(i + n > 6);
  49        if (i == 0) {
  50                args[0] = regs->orig_a0;
  51                args++;
  52                i++;
  53                n--;
  54        }
  55        memcpy(args, &regs->a1 + i * sizeof(regs->a1), n * sizeof(args[0]));
  56}
  57
  58static inline void
  59syscall_set_arguments(struct task_struct *task, struct pt_regs *regs,
  60                      unsigned int i, unsigned int n, const unsigned long *args)
  61{
  62        BUG_ON(i + n > 6);
  63        if (i == 0) {
  64                regs->orig_a0 = args[0];
  65                args++;
  66                i++;
  67                n--;
  68        }
  69        memcpy(&regs->a1 + i * sizeof(regs->a1), args, n * sizeof(regs->a0));
  70}
  71
  72static inline int
  73syscall_get_arch(struct task_struct *task)
  74{
  75        return AUDIT_ARCH_CSKY;
  76}
  77
  78#endif  /* __ASM_SYSCALL_H */
  79