| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 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 | |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 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) |
| 19 | static inline int flat_get_addr_from_rp(u32 __user *rp, u32 relval, u32 flags, |
| David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 20 | u32 *addr) |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 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 | |
| 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__ */ |