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
  15 static 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
  25 static 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__ */