release/src-rt-6.x/linux/linux-2.6/arch/um/kernel/skas/exec.c

   1 /*
   2  * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
   3  * Licensed under the GPL
   4  */
   5
   6 #include "linux/kernel.h"
   7 #include "asm/current.h"
   8 #include "asm/page.h"
   9 #include "asm/signal.h"
  10 #include "asm/ptrace.h"
  11 #include "asm/uaccess.h"
  12 #include "asm/mmu_context.h"
  13 #include "tlb.h"
  14 #include "skas.h"
  15 #include "um_mmu.h"
  16 #include "os.h"
  17
  18 void flush_thread_skas(void)
  19 {
  20         void *data = NULL;
  21         unsigned long end = proc_mm ? task_size : CONFIG_STUB_START;
  22         int ret;
  23
  24         ret = unmap(&current->mm->context.skas.id, 0, end, 1, &data);
  25         if(ret){
  26                 printk("flush_thread_skas - clearing address space failed, "
  27                        "err = %d\n", ret);
  28                 force_sig(SIGKILL, current);
  29         }
  30
  31         switch_mm_skas(&current->mm->context.skas.id);
  32 }
  33
  34 void start_thread_skas(struct pt_regs *regs, unsigned long eip,
  35                        unsigned long esp)
  36 {
  37         set_fs(USER_DS);
  38         PT_REGS_IP(regs) = eip;
  39         PT_REGS_SP(regs) = esp;
  40 }