Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) #include <linux/stddef.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #include <linux/ptrace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/sched/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/sched/task.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/sched/task_stack.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <asm/current.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <asm/processor.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <as-layout.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <mem_user.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <skas.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <os.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) void flush_thread(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	void *data = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	arch_flush_thread(&current->thread.arch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	ret = unmap(&current->mm->context.id, 0, STUB_START, 0, &data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	ret = ret || unmap(&current->mm->context.id, STUB_END,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 			   host_task_size - STUB_END, 1, &data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 		printk(KERN_ERR "flush_thread - clearing address space failed, "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 		       "err = %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 		force_sig(SIGKILL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 	get_safe_registers(current_pt_regs()->regs.gp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 			   current_pt_regs()->regs.fp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 	__switch_mm(&current->mm->context.id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) void start_thread(struct pt_regs *regs, unsigned long eip, unsigned long esp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 	PT_REGS_IP(regs) = eip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	PT_REGS_SP(regs) = esp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 	current->ptrace &= ~PT_DTRACE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #ifdef SUBARCH_EXECVE1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 	SUBARCH_EXECVE1(regs->regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) EXPORT_SYMBOL(start_thread);