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

source code of linux/arch/um/kernel/exec.c