| 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 | |
| 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) |
| 24 | static 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 | |
| 34 | static 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__ */ |