original development tree for Linux kernel GTP module; now long in mainline.
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/*
* Copyright (C) 2000, 2001 Jeff Dike (jdike@karaya.com)
* Licensed under the GPL
*/
#include "linux/slab.h"
#include "linux/smp_lock.h"
#include "linux/ptrace.h"
#include "asm/ptrace.h"
#include "asm/pgtable.h"
#include "asm/tlbflush.h"
#include "asm/uaccess.h"
#include "user_util.h"
#include "kern_util.h"
#include "mem_user.h"
#include "kern.h"
#include "irq_user.h"
#include "tlb.h"
#include "os.h"
#include "choose-mode.h"
#include "mode_kern.h"
void flush_thread(void)
{
arch_flush_thread(&current->thread.arch);
CHOOSE_MODE(flush_thread_tt(), flush_thread_skas());
}
void start_thread(struct pt_regs *regs, unsigned long eip, unsigned long esp)
{
CHOOSE_MODE_PROC(start_thread_tt, start_thread_skas, regs, eip, esp);
}
#ifdef CONFIG_TTY_LOG
extern void log_exec(char **argv, void *tty);
#endif
static long execve1(char *file, char __user * __user *argv,
char __user *__user *env)
{
long error;
struct tty_struct *tty;
#ifdef CONFIG_TTY_LOG
mutex_lock(&tty_mutex);
tty = get_current_tty();
if (tty)
log_exec(argv, tty);
mutex_unlock(&tty_mutex);
#endif
error = do_execve(file, argv, env, &current->thread.regs);
if (error == 0){
task_lock(current);
current->ptrace &= ~PT_DTRACE;
#ifdef SUBARCH_EXECVE1
SUBARCH_EXECVE1(&current->thread.regs.regs);
#endif
task_unlock(current);
set_cmdline(current_cmd());
}
return(error);
}
long um_execve(char *file, char __user *__user *argv, char __user *__user *env)
{
long err;
err = execve1(file, argv, env);
if(!err)
do_longjmp(current->thread.exec_buf, 1);
return(err);
}
long sys_execve(char __user *file, char __user *__user *argv,
char __user *__user *env)
{
long error;
char *filename;
lock_kernel();
filename = getname(file);
error = PTR_ERR(filename);
if (IS_ERR(filename)) goto out;
error = execve1(filename, argv, env);
putname(filename);
out:
unlock_kernel();
return(error);
}