arch/h8300/include/asm/flat.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * arch/h8300/asm/include/flat.h -- uClinux flat-format executables
   4  */
   5
   6 #ifndef __H8300_FLAT_H__
   7 #define __H8300_FLAT_H__
   8
   9 #include <asm/unaligned.h>
  10
  11 #define flat_argvp_envp_on_stack()              1
  12 #define flat_old_ram_flag(flags)                1
  13 #define flat_reloc_valid(reloc, size)           ((reloc) <= (size))
  14 #define flat_set_persistent(relval, p)          0
  15
  16 /*
  17  * on the H8 a couple of the relocations have an instruction in the
  18  * top byte.  As there can only be 24bits of address space,  we just
  19  * always preserve that 8bits at the top,  when it isn't an instruction
  20  * is is 0 (davidm@snapgear.com)
  21  */
  22
  23 #define flat_get_relocate_addr(rel)             (rel & ~0x00000001)
  24 static inline int flat_get_addr_from_rp(u32 __user *rp, u32 relval, u32 flags,
  25                                         u32 *addr, u32 *persistent)
  26 {
  27         u32 val = get_unaligned((__force u32 *)rp);
  28         if (!(flags & FLAT_FLAG_GOTPIC))
  29                 val &= 0x00ffffff;
  30         *addr = val;
  31         return 0;
  32 }
  33
  34 static inline int flat_put_addr_at_rp(u32 __user *rp, u32 addr, u32 rel)
  35 {
  36         u32 *p = (__force u32 *)rp;
  37         put_unaligned((addr & 0x00ffffff) | (*(char *)p << 24), p);
  38         return 0;
  39 }
  40
  41 #endif /* __H8300_FLAT_H__ */