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 <skas.h> 20 #include <os.h> 21 22 void flush_thread(void) 23 { 24 void *data = NULL; 25 int ret; 26 27 arch_flush_thread(¤t->thread.arch); 28 29 ret = unmap(¤t->mm->context.id, 0, STUB_START, 0, &data); 30 ret = ret || unmap(¤t->mm->context.id, STUB_END, 31 host_task_size - STUB_END, 1, &data); 32 if (ret) { 33 printk(KERN_ERR "flush_thread - clearing address space failed, " 34 "err = %d\n", ret); 35 force_sig(SIGKILL); 36 } 37 get_safe_registers(current_pt_regs()->regs.gp, 38 current_pt_regs()->regs.fp); 39 40 __switch_mm(¤t->mm->context.id); 41 } 42 43 void start_thread(struct pt_regs *regs, unsigned long eip, unsigned long esp) 44 { 45 PT_REGS_IP(regs) = eip; 46 PT_REGS_SP(regs) = esp; 47 current->ptrace &= ~PT_DTRACE; 48 #ifdef SUBARCH_EXECVE1 49 SUBARCH_EXECVE1(regs->regs); 50 #endif 51 } 52 EXPORT_SYMBOL(start_thread); 53