arch/m68k/include/asm/flat.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * flat.h -- uClinux flat-format executables
   4  */
   5
   6 #ifndef __M68KNOMMU_FLAT_H__
   7 #define __M68KNOMMU_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 static inline int flat_get_addr_from_rp(u32 __user *rp, u32 relval, u32 flags,
  15                                         u32 *addr, u32 *persistent)
  16 {
  17 #ifdef CONFIG_CPU_HAS_NO_UNALIGNED
  18         return copy_from_user(addr, rp, 4) ? -EFAULT : 0;
  19 #else
  20         return get_user(*addr, rp);
  21 #endif
  22 }
  23
  24 static inline int flat_put_addr_at_rp(u32 __user *rp, u32 addr, u32 rel)
  25 {
  26 #ifdef CONFIG_CPU_HAS_NO_UNALIGNED
  27         return copy_to_user(rp, &addr, 4) ? -EFAULT : 0;
  28 #else
  29         return put_user(addr, rp);
  30 #endif
  31 }
  32 #define flat_get_relocate_addr(rel)             (rel)
  33
  34 static inline int flat_set_persistent(u32 relval, u32 *persistent)
  35 {
  36         return 0;
  37 }
  38
  39 #define FLAT_PLAT_INIT(regs) \
  40         do { \
  41                 if (current->mm) \
  42                         (regs)->d5 = current->mm->start_data; \
  43         } while (0)
  44
  45 #endif /* __M68KNOMMU_FLAT_H__ */