| 131 | }; |
| 132 | |
| 133 | int lwp_user_space_init(struct rt_lwp *lwp, rt_bool_t is_fork) |
| 134 | { |
| 135 | void *stk_addr; |
| 136 | int err = -RT_ENOMEM; |
| 137 | const size_t flags = MMF_MAP_PRIVATE; |
| 138 | |
| 139 | err = arch_user_space_init(lwp); |
| 140 | if (err == RT_EOK) |
| 141 | { |
| 142 | if (!is_fork) |
| 143 | { |
| 144 | stk_addr = (void *)USER_STACK_VSTART; |
| 145 | err = rt_aspace_map(lwp->aspace, &stk_addr, |
| 146 | USER_STACK_VEND - USER_STACK_VSTART, |
| 147 | MMU_MAP_U_RWCB, flags, &STACK_OBJ, 0); |
| 148 | } |
| 149 | } |
| 150 | |
| 151 | return err; |
| 152 | } |
| 153 | |
| 154 | void lwp_aspace_switch(struct rt_thread *thread) |
| 155 | { |