LXR linux/arch/um/kernel/exec.c

   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
  22void 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
  43void 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}
  52EXPORT_SYMBOL(start_thread);
  53