| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame^] | 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__ */ |