uml: speed up exec
[linux-2.6.git] / 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 }