1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * flat.h -- uClinux flat-format executables 4 */ 5 6 #ifndef __M68KNOMMU_FLAT_H__ 7 #define __M68KNOMMU_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 static inline int flat_get_addr_from_rp(u32 __user *rp, u32 relval, u32 flags, 15 u32 *addr, u32 *persistent) 16 { 17 #ifdef CONFIG_CPU_HAS_NO_UNALIGNED 18 return copy_from_user(addr, rp, 4) ? -EFAULT : 0; 19 #else 20 return get_user(*addr, rp); 21 #endif 22 } 23 24 static inline int flat_put_addr_at_rp(u32 __user *rp, u32 addr, u32 rel) 25 { 26 #ifdef CONFIG_CPU_HAS_NO_UNALIGNED 27 return copy_to_user(rp, &addr, 4) ? -EFAULT : 0; 28 #else 29 return put_user(addr, rp); 30 #endif 31 } 32 #define flat_get_relocate_addr(rel) (rel) 33 34 static inline int flat_set_persistent(u32 relval, u32 *persistent) 35 { 36 return 0; 37 } 38 39 #define FLAT_PLAT_INIT(regs) \ 40 do { \ 41 if (current->mm) \ 42 (regs)->d5 = current->mm->start_data; \ 43 } while (0) 44 45 #endif /* __M68KNOMMU_FLAT_H__ */ 46