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1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * arch/arm/include/asm/flat.h -- uClinux flat-format executables
4  */
5 
6 #ifndef __ARM_FLAT_H__
7 #define __ARM_FLAT_H__
8 
9 #include <linux/uaccess.h>
10 
11 #define	flat_argvp_envp_on_stack()		1
12 #define	flat_old_ram_flag(flags)		(flags)
13 #define	flat_reloc_valid(reloc, size)		((reloc) <= (size))
14 
flat_get_addr_from_rp(u32 __user * rp,u32 relval,u32 flags,u32 * addr,u32 * persistent)15 static inline int flat_get_addr_from_rp(u32 __user *rp, u32 relval, u32 flags,
16 					u32 *addr, u32 *persistent)
17 {
18 #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
19 	return copy_from_user(addr, rp, 4) ? -EFAULT : 0;
20 #else
21 	return get_user(*addr, rp);
22 #endif
23 }
24 
flat_put_addr_at_rp(u32 __user * rp,u32 addr,u32 rel)25 static inline int flat_put_addr_at_rp(u32 __user *rp, u32 addr, u32 rel)
26 {
27 #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
28 	return copy_to_user(rp, &addr, 4) ? -EFAULT : 0;
29 #else
30 	return put_user(addr, rp);
31 #endif
32 }
33 
34 #define	flat_get_relocate_addr(rel)		(rel)
35 #define	flat_set_persistent(relval, p)		0
36 
37 #endif /* __ARM_FLAT_H__ */
38