LXR linux/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/*
  12 * on the H8 a couple of the relocations have an instruction in the
  13 * top byte.  As there can only be 24bits of address space,  we just
  14 * always preserve that 8bits at the top,  when it isn't an instruction
  15 * is is 0 (davidm@snapgear.com)
  16 */
  17
  18#define flat_get_relocate_addr(rel)             (rel & ~0x00000001)
  19static inline int flat_get_addr_from_rp(u32 __user *rp, u32 relval, u32 flags,
  20                                        u32 *addr)
  21{
  22        u32 val = get_unaligned((__force u32 *)rp);
  23        if (!(flags & FLAT_FLAG_GOTPIC))
  24                val &= 0x00ffffff;
  25        *addr = val;
  26        return 0;
  27}
  28
  29static inline int flat_put_addr_at_rp(u32 __user *rp, u32 addr, u32 rel)
  30{
  31        u32 *p = (__force u32 *)rp;
  32        put_unaligned((addr & 0x00ffffff) | (*(char *)p << 24), p);
  33        return 0;
  34}
  35
  36#endif /* __H8300_FLAT_H__ */
  37