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 "os.h" 20 #include "choose-mode.h" 21 #include "mode_kern.h" 22 23 void flush_thread(void) 24 { 25 arch_flush_thread(¤t->thread.arch); 26 CHOOSE_MODE(flush_thread_tt(), flush_thread_skas()); 27 } 28 29 void start_thread(struct pt_regs *regs, unsigned long eip, unsigned long esp) 30 { 31 CHOOSE_MODE_PROC(start_thread_tt, start_thread_skas, regs, eip, esp); 32 } 33 34 #ifdef CONFIG_TTY_LOG 35 extern void log_exec(char **argv, void *tty); 36 #endif 37 38 static long execve1(char *file, char __user * __user *argv, 39 char __user *__user *env) 40 { 41 long error; 42 struct tty_struct *tty; 43 44 #ifdef CONFIG_TTY_LOG 45 mutex_lock(&tty_mutex); 46 tty = get_current_tty(); 47 if (tty) 48 log_exec(argv, tty); 49 mutex_unlock(&tty_mutex); 50 #endif 51 error = do_execve(file, argv, env, ¤t->thread.regs); 52 if (error == 0){ 53 task_lock(current); 54 current->ptrace &= ~PT_DTRACE; 55 #ifdef SUBARCH_EXECVE1 56 SUBARCH_EXECVE1(¤t->thread.regs.regs); 57 #endif 58 task_unlock(current); 59 set_cmdline(current_cmd()); 60 } 61 return(error); 62 } 63 64 long um_execve(char *file, char __user *__user *argv, char __user *__user *env) 65 { 66 long err; 67 68 err = execve1(file, argv, env); 69 if(!err) 70 do_longjmp(current->thread.exec_buf, 1); 71 return(err); 72 } 73 74 long sys_execve(char __user *file, char __user *__user *argv, 75 char __user *__user *env) 76 { 77 long error; 78 char *filename; 79 80 lock_kernel(); 81 filename = getname(file); 82 error = PTR_ERR(filename); 83 if (IS_ERR(filename)) goto out; 84 error = execve1(filename, argv, env); 85 putname(filename); 86 out: 87 unlock_kernel(); 88 return(error); 89 } 90