LXR linux/arch/arm/include/asm/flat.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/*
   3 * arch/arm/include/asm/flat.h -- uClinux flat-format executables
   4 */
   5
   6#ifndef __ARM_FLAT_H__
   7#define __ARM_FLAT_H__
   8
   9#include <linux/uaccess.h>
  10
  11#define flat_argvp_envp_on_stack()              1
  12#define flat_old_ram_flag(flags)                (flags)
  13#define flat_reloc_valid(reloc, size)           ((reloc) <= (size))
  14
  15static inline int flat_get_addr_from_rp(u32 __user *rp, u32 relval, u32 flags,
  16                                        u32 *addr, u32 *persistent)
  17{
  18#ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
  19        return copy_from_user(addr, rp, 4) ? -EFAULT : 0;
  20#else
  21        return get_user(*addr, rp);
  22#endif
  23}
  24
  25static inline int flat_put_addr_at_rp(u32 __user *rp, u32 addr, u32 rel)
  26{
  27#ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
  28        return copy_to_user(rp, &addr, 4) ? -EFAULT : 0;
  29#else
  30        return put_user(addr, rp);
  31#endif
  32}
  33
  34#define flat_get_relocate_addr(rel)             (rel)
  35#define flat_set_persistent(relval, p)          0
  36
  37#endif /* __ARM_FLAT_H__ */
  38