1 // SPDX-License-Identifier: GPL-2.0
27 	info.si_call_addr = (void __user *)KSTK_EIP(current);  in trigger_sigsys()
29 	info.si_arch = syscall_get_arch(current);  in trigger_sigsys()
30 	info.si_syscall = syscall_get_nr(current, regs);  in trigger_sigsys()
37 	struct syscall_user_dispatch *sd = &current->syscall_dispatch;  in syscall_user_dispatch()
40 	if (likely(instruction_pointer(regs) - sd->offset < sd->len))  in syscall_user_dispatch()
46 	if (likely(sd->selector)) {  in syscall_user_dispatch()
51 		if (unlikely(__get_user(state, sd->selector))) {  in syscall_user_dispatch()
65 	sd->on_dispatch = true;  in syscall_user_dispatch()
66 	syscall_rollback(current, regs);  in syscall_user_dispatch()
72 static int task_set_syscall_user_dispatch(struct task_struct *task, unsigned long mode,  in task_set_syscall_user_dispatch()  argument
76 	switch (mode) {  in task_set_syscall_user_dispatch()
79 			return -EINVAL;  in task_set_syscall_user_dispatch()
84 		 * sanity against overflow and a 0-sized dispatcher  in task_set_syscall_user_dispatch()
89 			return -EINVAL;  in task_set_syscall_user_dispatch()
93 		 * if current has memory tagging enabled.  in task_set_syscall_user_dispatch()
101 			return -EFAULT;  in task_set_syscall_user_dispatch()
105 		return -EINVAL;  in task_set_syscall_user_dispatch()
108 	task->syscall_dispatch.selector = selector;  in task_set_syscall_user_dispatch()
109 	task->syscall_dispatch.offset = offset;  in task_set_syscall_user_dispatch()
110 	task->syscall_dispatch.len = len;  in task_set_syscall_user_dispatch()
111 	task->syscall_dispatch.on_dispatch = false;  in task_set_syscall_user_dispatch()
113 	if (mode == PR_SYS_DISPATCH_ON)  in task_set_syscall_user_dispatch()
121 int set_syscall_user_dispatch(unsigned long mode, unsigned long offset,  in set_syscall_user_dispatch()  argument
124 	return task_set_syscall_user_dispatch(current, mode, offset, len, selector);  in set_syscall_user_dispatch()
130 	struct syscall_user_dispatch *sd = &task->syscall_dispatch;  in syscall_user_dispatch_get_config()
134 		return -EINVAL;  in syscall_user_dispatch_get_config()
137 		cfg.mode = PR_SYS_DISPATCH_ON;  in syscall_user_dispatch_get_config()
139 		cfg.mode = PR_SYS_DISPATCH_OFF;  in syscall_user_dispatch_get_config()
141 	cfg.offset = sd->offset;  in syscall_user_dispatch_get_config()
142 	cfg.len = sd->len;  in syscall_user_dispatch_get_config()
143 	cfg.selector = (__u64)(uintptr_t)sd->selector;  in syscall_user_dispatch_get_config()
146 		return -EFAULT;  in syscall_user_dispatch_get_config()
157 		return -EINVAL;  in syscall_user_dispatch_set_config()
160 		return -EFAULT;  in syscall_user_dispatch_set_config()
162 	return task_set_syscall_user_dispatch(task, cfg.mode, cfg.offset, cfg.len,  in syscall_user_dispatch_set_config()