LXR linux/arch/sh/include/asm/syscall

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef __ASM_SH_SYSCALL_64_H
   3#define __ASM_SH_SYSCALL_64_H
   4
   5#include <uapi/linux/audit.h>
   6#include <linux/kernel.h>
   7#include <linux/sched.h>
   8#include <asm/ptrace.h>
   9
  10/* The system call number is given by the user in R9 */
  11static inline long syscall_get_nr(struct task_struct *task,
  12                                  struct pt_regs *regs)
  13{
  14        return (regs->syscall_nr >= 0) ? regs->regs[9] : -1L;
  15}
  16
  17static inline void syscall_rollback(struct task_struct *task,
  18                                    struct pt_regs *regs)
  19{
  20        /*
  21         * XXX: This needs some thought. On SH we don't
  22         * save away the original R9 value anywhere.
  23         */
  24}
  25
  26static inline long syscall_get_error(struct task_struct *task,
  27                                     struct pt_regs *regs)
  28{
  29        return IS_ERR_VALUE(regs->regs[9]) ? regs->regs[9] : 0;
  30}
  31
  32static inline long syscall_get_return_value(struct task_struct *task,
  33                                            struct pt_regs *regs)
  34{
  35        return regs->regs[9];
  36}
  37
  38static inline void syscall_set_return_value(struct task_struct *task,
  39                                            struct pt_regs *regs,
  40                                            int error, long val)
  41{
  42        if (error)
  43                regs->regs[9] = -error;
  44        else
  45                regs->regs[9] = val;
  46}
  47
  48static inline void syscall_get_arguments(struct task_struct *task,
  49                                         struct pt_regs *regs,
  50                                         unsigned long *args)
  51{
  52        memcpy(args, &regs->regs[2], 6 * sizeof(args[0]));
  53}
  54
  55static inline void syscall_set_arguments(struct task_struct *task,
  56                                         struct pt_regs *regs,
  57                                         const unsigned long *args)
  58{
  59        memcpy(&regs->regs[2], args, 6 * sizeof(args[0]));
  60}
  61
  62static inline int syscall_get_arch(struct task_struct *task)
  63{
  64        int arch = AUDIT_ARCH_SH;
  65
  66#ifdef CONFIG_64BIT
  67        arch |= __AUDIT_ARCH_64BIT;
  68#endif
  69#ifdef CONFIG_CPU_LITTLE_ENDIAN
  70        arch |= __AUDIT_ARCH_LE;
  71#endif
  72
  73        return arch;
  74}
  75#endif /* __ASM_SH_SYSCALL_64_H */
  76