arch/um/kernel/exec_kern.c

   1 /*
   2  * Copyright (C) 2000, 2001 Jeff Dike (jdike@karaya.com)
   3  * Licensed under the GPL
   4  */
   5
   6 #include "linux/slab.h"
   7 #include "linux/smp_lock.h"
   8 #include "linux/ptrace.h"
   9 #include "asm/ptrace.h"
  10 #include "asm/pgtable.h"
  11 #include "asm/tlbflush.h"
  12 #include "asm/uaccess.h"
  13 #include "user_util.h"
  14 #include "kern_util.h"
  15 #include "mem_user.h"
  16 #include "kern.h"
  17 #include "irq_user.h"
  18 #include "tlb.h"
  19 #include "2_5compat.h"
  20 #include "os.h"
  21 #include "time_user.h"
  22 #include "choose-mode.h"
  23 #include "mode_kern.h"
  24
  25 void flush_thread(void)
  26 {
  27         CHOOSE_MODE(flush_thread_tt(), flush_thread_skas());
  28 }
  29
  30 void start_thread(struct pt_regs *regs, unsigned long eip, unsigned long esp)
  31 {
  32         CHOOSE_MODE_PROC(start_thread_tt, start_thread_skas, regs, eip, esp);
  33 }
  34
  35 extern void log_exec(char **argv, void *tty);
  36
  37 static long execve1(char *file, char __user * __user *argv,
  38                     char *__user __user *env)
  39 {
  40         long error;
  41
  42 #ifdef CONFIG_TTY_LOG
  43         log_exec(argv, current->tty);
  44 #endif
  45         error = do_execve(file, argv, env, &current->thread.regs);
  46         if (error == 0){
  47                 task_lock(current);
  48                 current->ptrace &= ~PT_DTRACE;
  49                 task_unlock(current);
  50                 set_cmdline(current_cmd());
  51         }
  52         return(error);
  53 }
  54
  55 long um_execve(char *file, char __user *__user *argv, char __user *__user *env)
  56 {
  57         long err;
  58
  59         err = execve1(file, argv, env);
  60         if(!err)
  61                 do_longjmp(current->thread.exec_buf, 1);
  62         return(err);
  63 }
  64
  65 long sys_execve(char *file, char __user *__user *argv,
  66                 char __user *__user *env)
  67 {
  68         long error;
  69         char *filename;
  70
  71         lock_kernel();
  72         filename = getname((char __user *) file);
  73         error = PTR_ERR(filename);
  74         if (IS_ERR(filename)) goto out;
  75         error = execve1(filename, argv, env);
  76         putname(filename);
  77  out:
  78         unlock_kernel();
  79         return(error);
  80 }
  81
  82 /*
  83  * Overrides for Emacs so that we follow Linus's tabbing style.
  84  * Emacs will notice this stuff at the end of the file and automatically
  85  * adjust the settings for this buffer only.  This must remain at the end
  86  * of the file.
  87  * ---------------------------------------------------------------------------
  88  * Local variables:
  89  * c-file-style: "linux"
  90  * End:
  91  */