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Linux/arch/um/kernel/exec.c

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  1 /*
  2  * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
  3  * Licensed under the GPL
  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(&current->thread.arch);
 28 
 29         ret = unmap(&current->mm->context.id, 0, STUB_START, 0, &data);
 30         ret = ret || unmap(&current->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, current);
 36         }
 37         get_safe_registers(current_pt_regs()->regs.gp,
 38                            current_pt_regs()->regs.fp);
 39 
 40         __switch_mm(&current->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 

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