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 static inline int flat_get_addr_from_rp(u32 __user *rp, u32 relval, u32 flags,
  13                                         u32 *addr, u32 *persistent)
  14 {
  15 #ifdef CONFIG_CPU_HAS_NO_UNALIGNED
  16         return copy_from_user(addr, rp, 4) ? -EFAULT : 0;
  17 #else
  18         return get_user(*addr, rp);
  19 #endif
  20 }
  21
  22 static inline int flat_put_addr_at_rp(u32 __user *rp, u32 addr, u32 rel)
  23 {
  24 #ifdef CONFIG_CPU_HAS_NO_UNALIGNED
  25         return copy_to_user(rp, &addr, 4) ? -EFAULT : 0;
  26 #else
  27         return put_user(addr, rp);
  28 #endif
  29 }
  30
  31 #define FLAT_PLAT_INIT(regs) \
  32         do { \
  33                 if (current->mm) \
  34                         (regs)->d5 = current->mm->start_data; \
  35         } while (0)
  36
  37 #endif /* __M68KNOMMU_FLAT_H__ */