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#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)
  24static 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
  34static 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__ */
  42