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)
flat_get_addr_from_rp(u32 __user * rp,u32 relval,u32 flags,u32 * addr)19 static 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
flat_put_addr_at_rp(u32 __user * rp,u32 addr,u32 rel)29 static 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
