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 int execve1(char *file, char **argv, char **env)
  38 {
  39         int error;
  40
  41 #ifdef CONFIG_TTY_LOG
  42         log_exec(argv, current->tty);
  43 #endif
  44         error = do_execve(file, argv, env, &current->thread.regs);
  45         if (error == 0){
  46                 current->ptrace &= ~PT_DTRACE;
  47                 set_cmdline(current_cmd());
  48         }
  49         return(error);
  50 }
  51
  52 int um_execve(char *file, char **argv, char **env)
  53 {
  54         int err;
  55
  56         err = execve1(file, argv, env);
  57         if(!err)
  58                 do_longjmp(current->thread.exec_buf, 1);
  59         return(err);
  60 }
  61
  62 int sys_execve(char *file, char **argv, char **env)
  63 {
  64         int error;
  65         char *filename;
  66
  67         lock_kernel();
  68         filename = getname((char *) file);
  69         error = PTR_ERR(filename);
  70         if (IS_ERR(filename)) goto out;
  71         error = execve1(filename, argv, env);
  72         putname(filename);
  73  out:
  74         unlock_kernel();
  75         return(error);
  76 }
  77
  78 /*
  79  * Overrides for Emacs so that we follow Linus's tabbing style.
  80  * Emacs will notice this stuff at the end of the file and automatically
  81  * adjust the settings for this buffer only.  This must remain at the end
  82  * of the file.
  83  * ---------------------------------------------------------------------------
  84  * Local variables:
  85  * c-file-style: "linux"
  86  * End:
  87  */