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 23 void flush_thread(void) 24 { 25 void *data = NULL; 26 int ret; 27 28 arch_flush_thread(¤t->thread.arch); 29 30 ret = unmap(¤t->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(¤t->mm->context.id); 40 } 41 42 void 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 } 51 EXPORT_SYMBOL(start_thread); 52