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Diffstat (limited to 'arch/h8300/include/asm/flat.h')
| -rw-r--r-- | arch/h8300/include/asm/flat.h | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/h8300/include/asm/flat.h b/arch/h8300/include/asm/flat.h new file mode 100644 index 000000000..78070f924 --- /dev/null +++ b/arch/h8300/include/asm/flat.h @@ -0,0 +1,36 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * arch/h8300/asm/include/flat.h -- uClinux flat-format executables + */ + +#ifndef __H8300_FLAT_H__ +#define __H8300_FLAT_H__ + +#include <asm/unaligned.h> + +/* + * on the H8 a couple of the relocations have an instruction in the + * top byte. As there can only be 24bits of address space, we just + * always preserve that 8bits at the top, when it isn't an instruction + * is is 0 (davidm@snapgear.com) + */ + +#define flat_get_relocate_addr(rel) (rel & ~0x00000001) +static inline int flat_get_addr_from_rp(u32 __user *rp, u32 relval, u32 flags, + u32 *addr) +{ + u32 val = get_unaligned((__force u32 *)rp); + if (!(flags & FLAT_FLAG_GOTPIC)) + val &= 0x00ffffff; + *addr = val; + return 0; +} + +static inline int flat_put_addr_at_rp(u32 __user *rp, u32 addr, u32 rel) +{ + u32 *p = (__force u32 *)rp; + put_unaligned((addr & 0x00ffffff) | (*(char *)p << 24), p); + return 0; +} + +#endif /* __H8300_FLAT_H__ */ |