1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * arch/h8300/asm/include/flat.h -- uClinux flat-format executables
4*4882a593Smuzhiyun */
5*4882a593Smuzhiyun
6*4882a593Smuzhiyun #ifndef __H8300_FLAT_H__
7*4882a593Smuzhiyun #define __H8300_FLAT_H__
8*4882a593Smuzhiyun
9*4882a593Smuzhiyun #include <asm/unaligned.h>
10*4882a593Smuzhiyun
11*4882a593Smuzhiyun /*
12*4882a593Smuzhiyun * on the H8 a couple of the relocations have an instruction in the
13*4882a593Smuzhiyun * top byte. As there can only be 24bits of address space, we just
14*4882a593Smuzhiyun * always preserve that 8bits at the top, when it isn't an instruction
15*4882a593Smuzhiyun * is is 0 (davidm@snapgear.com)
16*4882a593Smuzhiyun */
17*4882a593Smuzhiyun
18*4882a593Smuzhiyun #define flat_get_relocate_addr(rel) (rel & ~0x00000001)
flat_get_addr_from_rp(u32 __user * rp,u32 relval,u32 flags,u32 * addr)19*4882a593Smuzhiyun static inline int flat_get_addr_from_rp(u32 __user *rp, u32 relval, u32 flags,
20*4882a593Smuzhiyun u32 *addr)
21*4882a593Smuzhiyun {
22*4882a593Smuzhiyun u32 val = get_unaligned((__force u32 *)rp);
23*4882a593Smuzhiyun if (!(flags & FLAT_FLAG_GOTPIC))
24*4882a593Smuzhiyun val &= 0x00ffffff;
25*4882a593Smuzhiyun *addr = val;
26*4882a593Smuzhiyun return 0;
27*4882a593Smuzhiyun }
28*4882a593Smuzhiyun
flat_put_addr_at_rp(u32 __user * rp,u32 addr,u32 rel)29*4882a593Smuzhiyun static inline int flat_put_addr_at_rp(u32 __user *rp, u32 addr, u32 rel)
30*4882a593Smuzhiyun {
31*4882a593Smuzhiyun u32 *p = (__force u32 *)rp;
32*4882a593Smuzhiyun put_unaligned((addr & 0x00ffffff) | (*(char *)p << 24), p);
33*4882a593Smuzhiyun return 0;
34*4882a593Smuzhiyun }
35*4882a593Smuzhiyun
36*4882a593Smuzhiyun #endif /* __H8300_FLAT_H__ */
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