LXR linux/arch/ia64/include/asm/syscall.h

   1/* SPDX-License-Identifier: GPL-2.0-only */
   2/*
   3 * Access to user system call parameters and results
   4 *
   5 * Copyright (C) 2008 Intel Corp.  Shaohua Li <shaohua.li@intel.com>
   6 *
   7 * See asm-generic/syscall.h for descriptions of what we must do here.
   8 */
   9
  10#ifndef _ASM_SYSCALL_H
  11#define _ASM_SYSCALL_H  1
  12
  13#include <uapi/linux/audit.h>
  14#include <linux/sched.h>
  15#include <linux/err.h>
  16
  17static inline long syscall_get_nr(struct task_struct *task,
  18                                  struct pt_regs *regs)
  19{
  20        if ((long)regs->cr_ifs < 0) /* Not a syscall */
  21                return -1;
  22
  23        return regs->r15;
  24}
  25
  26static inline void syscall_rollback(struct task_struct *task,
  27                                    struct pt_regs *regs)
  28{
  29        /* do nothing */
  30}
  31
  32static inline long syscall_get_error(struct task_struct *task,
  33                                     struct pt_regs *regs)
  34{
  35        return regs->r10 == -1 ? -regs->r8:0;
  36}
  37
  38static inline long syscall_get_return_value(struct task_struct *task,
  39                                            struct pt_regs *regs)
  40{
  41        return regs->r8;
  42}
  43
  44static inline void syscall_set_return_value(struct task_struct *task,
  45                                            struct pt_regs *regs,
  46                                            int error, long val)
  47{
  48        if (error) {
  49                /* error < 0, but ia64 uses > 0 return value */
  50                regs->r8 = -error;
  51                regs->r10 = -1;
  52        } else {
  53                regs->r8 = val;
  54                regs->r10 = 0;
  55        }
  56}
  57
  58extern void ia64_syscall_get_set_arguments(struct task_struct *task,
  59        struct pt_regs *regs, unsigned long *args, int rw);
  60static inline void syscall_get_arguments(struct task_struct *task,
  61                                         struct pt_regs *regs,
  62                                         unsigned long *args)
  63{
  64        ia64_syscall_get_set_arguments(task, regs, args, 0);
  65}
  66
  67static inline void syscall_set_arguments(struct task_struct *task,
  68                                         struct pt_regs *regs,
  69                                         unsigned long *args)
  70{
  71        ia64_syscall_get_set_arguments(task, regs, args, 1);
  72}
  73
  74static inline int syscall_get_arch(struct task_struct *task)
  75{
  76        return AUDIT_ARCH_IA64;
  77}
  78#endif  /* _ASM_SYSCALL_H */
  79